Some standard content:
Light Industry Standard of the People's Republic of China
Terminology of pulp and paper-making machinery and equipment
Terminology of pulp and paper-making machinery and equipment1 Subject content and scope of application
This standard specifies the terms related to machinery and equipment for pulp and paper industry. Vocabulary QB/T 16931993
This standard applies to the names, product standards, teaching materials and other relevant technical documents of machinery and equipment for pulp and paper industry. 2 Reference standards
GB/T4687 Technical spectrum of paper, paperboard and pulp Part 1 3 Basic terms
3.1 Pulp
Prepared fibrous material for further processing, which is used in papermaking, regenerated cellulose fiber and film and related industries. Papermaking pulp paper-makingpulp, papergradepulp3.2
Pulp (see 3.1) for papermaking (see 3.19) and paperboard (see 3.20). 3.3 Dissolving pulp
Pulp mainly used for making regenerated cellulose fiber and cellulose chemical derivatives (see 3.1). 3.4 Air-dry pulp
Technically refers to pulp whose moisture content is in balance with the surrounding environment, and commercially refers to pulp with a specified moisture content agreed upon by both the supply and demand parties. This specified moisture content is converted into a commercially specified lower degree of pulp: this degree is generally specified as 90%.
3.5 Pulping
The process of grinding plant fiber raw materials into fiber materials or separating fiber materials from plant fiber raw materials by chemical or mechanical methods or a combination of both.
3.6 Aw-material preparing The necessary treatment process to make the stored plant fiber raw materials meet the requirements of the pulping method. Cooking
Heating plant fiber raw materials with water and chemicals. 3.8
Bleaching
Removing colored matter from pulp (see 3.1) or changing the color of pulp to a certain extent, the purpose is to increase the brightness of pulp (i.e. blue light reflection factor).
3.9 Screening of pulp Pulp (see 3.1) or paper stock (see 3.18) is separated into qualified pulp (or good pulp, see 4.126) and coarse stock (or tailings, see 4.127) by passing pulp (see 3.1) or paper stock (see 3.18) through one or more sieves.
3.10 Pulp cleaning Pulp stock cleaning The removal of useless substances from pulp or paper stock by physical methods such as gravity cleaning or centrifugal cleaning or by passing through a certain size of sieve holes (plastic sieve slits, see 4.128). Approved by the Ministry of Light Industry of the People's Republic of China on March 28, 1993 and implemented on October 1, 1993.
3.11 Wastepaper
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Paper or paper that is reused as raw material for papermaking after treatment. 3.12 Chemical pulp Chemical pulp Pulp made by steaming biological fiber raw materials with chemical liquid to remove a part of non-cellulose components. Chemical pulp with more non-cellulose components removed does not need to be subjected to subsequent mechanical treatment for fiber separation; while semi-chemical pulp only removes a smaller part of non-cellulose components and requires mechanical methods to separate the fibers. Chemical pulp includes sulfate pulp, caustic soda pulp, sulfite pulp, neutral or alkaline sulfite pulp, etc.
3.13 Chemimechanical pulp chenisalmechanical pulp Pulp obtained by mechanically grinding chemically treated plant fiber raw materials. 314 Mechanical pulp mechanicalpilp
Pulp obtained by mechanically grinding plant fiber raw materials. 315 Disk mechanical pulp Fefinermechanicniputip Pulp obtained by mechanically grinding wood chips or grass fiber raw materials directly fed without pretreatment using a disk machine (see 4.94).
3.16 Stonegroundwpodpulp Pulp obtained by grinding debarked logs using a treadmill (see 4, 74). 3.17
papermaking
The process of further treating pulp and conditioning it into stock (see 3.18) to make paper or paperboard on a paper machine or paper machine board. 3.18 Stock
A suspension of a kind of papermaking pulp (see 3.2) after being shredded, purified, etc. and mixed with other papermaking auxiliary materials. Before being placed on the forming curtain of a paper machine or paper machine to form a paper web, this mixed suspension is called paper stock. 3.19 PAPER
A uniform sheet made by depositing or laying vegetable fibers, organic fibers, animal fibers, chemical fibers or a mixture of these fibers on the forming screen of a forming device to form a paper layer and then removing the suspension medium and drying. In a broad sense, it can include paperboard (see 3.20): paper and paperboard are distinguished by their characteristics and uses. 3.20 Board (paperboard)
A general term for certain papers (see 3.19>) with greater basis weight, greater uniformity, and greater thickness. 3.21 Fiber composition (of paper or board) is also called the fiber composition of paper or board, which is the proportion of various fiber materials in the paper or board, usually expressed as a percentage of the total weight of the fiber materials.
3.22 Formation
A paper or paper layer (see 3.23) or a multi-layer paper layer combined with a wet paper web in which the fibers are dispersed, arranged and interwoven to form a stable structural organization.
3.23 Ply (of paper or board) A web of fibers and other solid materials with a uniform composition (see 3.24) formed on the forming wire of a paper or board machine.
3.24 Composition (of paper or board) The nature and proportion of the fiber and non-fibrous components in the paper layer of paper or board. 3.25 Web
A continuous length of paper or paperboard during production and processing. 3.26 Sheet (of paper or bourd) A piece of paper or paperboard with a certain length and width, also called a sheet of paper or paper. Sheet is used to refer to shaped paper.
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3.27 Trimmed width of paper or board
The width of the finished paper web obtained after the paper edges are cut off on the paper machine or paperboard machine or other finishing processing machinery and equipment. reel or roll (of paper or board) 3-28
paper or paperboard wound on a reel or core, the former refers to the base paper roll (see 6.26) wound on a reel (see 6.22), the latter refers to the finished paper roll wound on a rewinder (see 6.29) or rewinder (see 6.30). 3.29 size (of a sheet) size (of a sheet) expressed in terms of width and length, with the narrower side being the width. 3.30 machine direction (longitudinal direction) of paper the direction in the plane of the paper web that is consistent with the paper output direction of the paper or board machine. Crosswise (of paper) Crogs (transverse) direction (of paper) 3.31
The direction in the plane of the paper web that is perpendicular to the longitudinal direction (see 3.30), or the direction parallel to the axes of the screens of the paper or board machine.
3.32 Z-direction (of paper or board) The direction along the thickness of the paper web, that is, the direction perpendicular to the paper web. 3.33 Top side (of paper) The side of a paper web or paper layer formed on a forming device with a forming wire that is in contact with different forming wires. 3.34 Wire side (of paper) The side of a paper web or paper layer formed on a forming device with a forming wire that is in contact with the forming wire. A paper web or paper layer formed on a former with two wires may have two wire sides. 3.35 Broke Paper or board that is broken or rejected at any stage of the papermaking process. Wet broke occurs in the wet section of a paper or board machine and dry broke occurs in the stages after the wet section of a paper or board machine, including finishing (see 3.36). Broke is usually re-refined into stock.
3.36 Finishing (af paper or bard) The physical or mechanical finishing, decorative treatment of paper or board to give it certain characteristics or to meet commercial specifications, or the results of such treatments, such as calendering (see 6.2), moistening (see 6.4) and reeling, cutting, sorting, counting, etc.
3.37 Converting (of paper or board) The process of treating paper or board by a specific method or by applying certain materials or substances to change the properties of the paper or board. Coating (see 7.1), impregnation (see 7.2), lamination (see 7.3), etc. 3.38 Pulp sheet
Sheet of air-dried (see 3.4) commercial pulp.
3.39 Wet pulp lap
Pulp that has been pressed but not dried or air-dried after forming. 4 Pulping machinery and equipment
4.1 Log haul
A type of transport equipment that uses chains to pull logs. Usually divided into longitudinal and transverse types according to the relationship between the original axis and the direction of travel. 4.2 Discsaw
A machine that uses a rotating saw blade to saw logs into sections. Disc saw with horizontal frame and balanced construction4.3
A circular saw with horizontal saw frame and counterweight,49
4.4 Slasher
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A circular saw with multiple mesh saw blades and log feeding chains working simultaneously. 4.5 Sleshmabilt
A circular saw with a saw frame that can move along a track. 4.6 Log pond
A pool or water surface for storing logs.
Log splitter
A machine that splits large-diameter logs along their axial or longitudinal directions. According to the original state of the plate during operation, it can be divided into three types: vertical single-blade, vertical double-blade and horizontal.
4.8 Horizontal log splitter A machine that uses a knife or a blade to move horizontally to pierce the log. 4.9 Knot boring machine is called a knot boring machine, which is a machine that removes knots from the log section used for grinding wood. In terms of knots, it is mainly a suspended electric drill that can be operated by hand and has a mobile workbench.
4.10 Debarking
is called debarking, which removes the outer or inner bark of the log. 4. 11
Drum bark machine
A machine that removes bark by rubbing the knife against the rotating drum. 4. 12 Drum harker Fur branch wood A drum harker fur branch wood is a drum harker suitable for branch wood bark, with a checkerboard-shaped row of mountain-shaped shaving knife groups on the inner wall of the drum. 4.13 Ringbarker
A machine in which the bark is removed by metal stripping blades on a hollow annular rotor as the logs are fed individually. 4.14 Ringbarker with swing arms and thorny rollers feeding mechanism
A ringbarker in which a multi-thorny feeder mounted on three swing arms causes the logs to coincide with the centre of rotation of the barking knives on the hollow rotor. Note: For example, Cambio barker. Ringbarker with chain type barking knives 4.15
A ringbarker with chain type barking knives on a hollow rotor. 4.16 Ringbarker with chuek type harking ringA ringbarker with chuek type barking knives on a hollow rotor. 4.7 Knife barker
A machine that uses a knife disc (see 4.18) or a knife roll (see 4.19) to peel the bark of logs one by one along the axial direction. It is mainly composed of a feeding mechanism, a mechanism for pressing and turning logs, and a knife disc or a knife roll. 4.18 Knife disc
A rotating circular machine with blades for cutting, slicing or grinding. The blades installed on the force disc are also called flying knives (see 4.20).
4.19 Knife roll (drum)
A rotating cylindrical machine with blades for cutting, slicing or grinding. The blades installed on the knife roll are also called flying knives (see 4.20).
4.20 Fly (revolving) knives
A general term for blades for cutting, slicing, cutting and grinding installed on rotating machines. 4.21 Hydrabarker
Equipment that uses high pressure water to impact the surface of logs to remove bark. 50
4.22 Chinping
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Slices logs or slabs into long, wide and thick chips suitable for cooking. 4.23 Chipper
Machine that slices logs, slabs, slabs or bamboo into chips. 4.24 Discchipper
Machine that slices logs or bamboo pressed against a bottom knife with a rotating knife disc. It can be divided into two types: oblique feeding and horizontal feeding according to the feeding direction when cutting the logs.
4.25 Drutuchipper
Machine that presses logs against a rotating knife roller to slice them into chips. 4.26 Double conical chipper A chipper with two truncated cone-shaped blades mounted on a horizontal axis. 4.27 Spiral chipper A spiral chipper with two truncated cone-shaped blades mounted on the same horizontal axis. The blades are arranged in a spiral line. 4.28 Slah chipper A chipper with a forced feeding mechanism consisting of dozens of suction rollers and used for cutting slabs or scraps. 4.29 Chip screen A machine for screening wood chips, bamboo chips and other chips. It is divided into two types according to the shape of the screen plate: flat screen and round screen. Flat screens include vibrating screens and swinging screens. 4.30 Chip crusher A machine for crushing the coarse wood or bamboo chips screened out to make them suitable for cooking. 4.31
squirrel-cage chipcrusherA machine that crushes coarse wood or bamboo chips between a squirrel-cage rotor and a stator. 4.32hammer re-crusherA machine that chops coarse wood or bamboo chips between a rotating hammer and a fixed bottom knife. 4.33Sieve analysis of chipsAn analysis of the percentage of the original dry weight of the chips (including sawdust and small chips, etc.) obtained by passing the chips through a sieve with holes of a specified size, used to evaluate the chipping and screening quality. 4.34
knife drum straw cutterA machine that cuts grass fiber raw materials into chips with a knife roller and a bottom knife, and its feed roller is pressed on the feed belt to form a feeding mechanism. 4.35
Disc cutter
A machine that uses a knife disc and a bottom knife to cut grass fiber materials such as grass into pieces. Its material-cutting mechanism includes upper and lower chains and a chain. 4.36Rag cutter
A machine that uses a knife chain and a bottom knife to break up rags. 4.37Roller bagasse bale openerRoll type bagasse bale openerA machine that uses two rollers with different rotation speeds to break up bagasse bags. 4.38Bagasse baleloosening machineIt has a loosening roller to loosen the bagasse bags. It is mostly used before the squirrel cage pith remover. 4.39 Hammer depither A machine in which bagasse fibers and pith are separated by the impact of a rotating hammer and the pith is removed through a sieve plate. There are two types: vertical and horizontal. Quirrel-cage depither 4.40
A machine in which bagasse fibers and pith are separated in a rotating cage structure and the pith is removed. 4.41 Railruad duster A dust removal device for grass materials or rags, etc., consisting of an exhaust system under 3 to 8 interlocking curved sieve plates. Synonyms: horn dust collector,
4.42 Water film dust collector waterfilmdusterQB/T 1693—1993
A kind of wind dust collector that uses water to spray on the inner wall of the device to form a water film to take away the dust separated by centrifugal force, 4.43 Fanduster
Equipment that uses wind power to separate leather pieces with different weights of pedicle membranes, reed sheaths, etc. and dust. Vibrating screen vibrating screen
A flat screen for screening wood chips, grass chips, etc., and the relevant parameters of its screen frame vibration can change due to load factors. 4.45
Semi-vibrating screen sehi-vibrating screen a flat screen similar to a vibrating screen, and the relevant parameters of its screen frame vibration are fixed in the middle of the screen and variable at both ends ahaking screen ahakingscrcer
A flat screen with constant displacement, velocity and acceleration of the screen frame vibration. Swinging screen
A flat screen in which the frame of the screen swings in the plane of the screen plate. 4.48 Chip bin
Equipment for storing wood chips, bamboo chips or grass and other fiber raw materials before cooking. Synonym, silo.
4.49 Conical-bottomed chip bin A chip bin with a square or conical bottom (see 4.48) unloaded by its own weight or equipped with a discharger. 4.50 Livebottomed chip bin A chip bin with slightly inclined side walls and a spiral, scraper or chain discharger at the bottom. 4.51 Batch cooking
A cooking method in which the whole cooking process is completed and the pulp is discharged before re-feeding to start the next cooking process. 4.52 Continuous cooking A cooking method in which the material is continuously fed into the digester and the material is continuously discharged after the cooking process is completed. Indirect cooking A cooking method in which the liquid is extracted from the digester during the cooking process and the heat is recycled into the digester. 4.54 Multistage cooking process A cooking method in which two or more cooking liquids with different acidity, composition (formula) or concentration are used for soaking or cooking. 4.55 Rotary spherical digester A spherical rotary digester used in the intermittent cooking method. 4.56 Blowing jaurnal of spherical digester A hollow jaurnal of spherical digester (see 4.55) that serves as a passage for the pulp to be discharged when the pulp is sprayed after cooking. 4.57 Vertical digester Also known as vertical, it is a digester with a cylindrical body and a conical bottom, equipped with a circulating heating system. 4.58 Digester lining Acid-resistant brick lining for vertical digesters of sulfite pulp. Jeedpacker
Equipment for loading the material into the digester evenly and tightly. There are two types: airflow type and machine cutting type. 4.60 Blow fank
A cylindrical mass storage container for receiving the pulp sprayed out of the digester. Its bottom has a conical bottom or a flat bottom, and is equipped with an agitator. 4.61 Blow pin
A concrete structure for receiving the pulp sprayed out of the digester in a small paper mill. 4.62 Vertical continuous digester A vertical round tower-shaped continuous digester that withstands high air pressure. The material is divided into impregnation, heating, cooking, heat diffusion washing and cooling zones, and the material is fed into the digester by a high pressure feeder.
method, such as Kinihyt continuous digester QB/T1693-1993
4.63 Horizontal tubular continuous digester A digester (tube) with a solid axis and stacked and equipped with a speed-adjustable screw propeller. The digested material passes through each tube sequentially and is heated and cooked into pulp.
For example, Pandin continuous digester. 4.64 Lineated tubular canlinuous digester A digester tube installed at a 45-degree angle and equipped with a scraper conveyor. The material enters and the pulp is discharged at the upper end of the tube. The material is preheated, impregnated, and steam and carbonyl phase cooked during the cooking process. Note: For example, MD (Mexsing-Iurker) steam cooker and Bauer (Hauer) continuous steam cooker. 4.65# Steaming pen sicam chamber
Equipment for heating the sheet with steam before the continuous steam cooker. Usually equipped with a sheet conveying device. 4.66 Low pressure feeder low pressure feeder low pressure feeder device with a conical rotor with a compartment to input the sheet into the steam chamber, 4.67
High pressure feeder high pressurc Icecler feeder between the upper and lower steam chambers of the continuous steam cooker and the top of the steam cooker. Its conical rotor has several groups of material passage cavities, which are connected to the steam cooker, the liquid medicine circulation system and the top of the pot during operation, and the sheet and liquid medicine are input into the steam cooker. 4.68 Pocket type feeder A feeding device for continuous digesters: its pot-shaped or cylindrical rotor has 7 to 10 compartments, and the steam pressure balance pipe makes the shaft force balanced and the rotation smooth.
4.69 Screw feeder screwIcedcr
A device that uses a variable pitch circular or conical screw to press the uniformly hooked sheet into a plug (see 4.70) and then feed it into a horizontal continuous digester. 4.70 Chip pluig or feed plug (far horizantaltubular cantinuous digester)
The sheet is squeezed into a plug shape by the screw feeder, and it also acts as a seal for the horizontal continuous digester. 4.71 Discharger for continuous digester is also called discharge valve, which is the discharge device of continuous digester. There are many types such as curved arm type, wing type, mantis rotary type and plug type. 4.72 Blow valve
A non-material device of continuous digester, which is a valve that discharges the cooked pulp into the blow pot or blow tank or blow bin. Its characteristics are fast opening and small resistance.
4.73 Cold blow off
At the end of cooking, waste liquid (black liquor, see 4.227) is injected to reduce the pulp temperature before blowing. 4.74 Grinder
Equipment that presses peeled logs against the working surface of a rotating grinding stone by hydraulic or mechanical force to break the wood into fibers. 4.75 Continuous grinder A grinder in which logs are continuously pressed against the grinding stone at the feeding position. 4.76 Intermittent grinder A grinder in which the grinding stone is not installed at the feeding position and does not grind the logs. 4.77 Hydraulic grinder A grinder in which the pressure plate is pushed by the hydraulic cylinder to press the logs against the grinding stone. 4.78 Packel grinder
A hydraulic grinder in which a space called a material bag is formed between the pressure plate and the working surface of the grinding stone to hold a certain amount of logs. Usually equipped with two or three material bags. 5.3
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4.79 Dual-packet type hydraulic grinder A hydraulic wood grinder equipped with two materials, one on each side of the grinding stone. Jiang: For example, the Great Northern (Ireat Varthern) wood grinder. 4.80 Cylinder bag type wood grinder grinder with slidingPacket A continuous hydraulic wood grinder with a sliding wood bag above two material bags and a retractable sleeve hydraulic cylinder. Note: For example, Kamyr grinder. Pressure wood grinder pressuregrinder
A wood grinder in which the entire wood grinding device is set in a closed working chamber so that the grinding operation is carried out under a certain pressure. 4.82 Tuagazinegrinder A water pressure wood grinder with a certain amount of logs stored above the grinding stone so that the logs are placed between the grinding stone surface and the pressure plate. Although it is an intermittent wood grinder, it is close to continuous operation. 4.83 Chain grinder
A grinding machine that uses a pair of winged endless chains installed on both sides of the ancient wood storage to press the log sections onto the grinding stone working surface under the wood storage for continuous grinding operations.
4.B4 Single-chain grinder A chain grinder with a pair of wood feeding chains on both sides of the storage. 4.85 Dual-chain grinder: a chain grinder with two pairs of wood feeding chains on both sides of the wood storage; 4.86 Lever grinder: a continuous grinder with pairs of levers acting alternately on both sides of an upright wood storage to press the original wood onto the grinding stone working surface under the wood storage for grinding;
for example, the KMW KMW wood grinder; 4.87 Ring type grinder: a grinder in which the grinding stone is eccentrically installed in a slowly rotating feed ring to form a shape-changing extrusion zone to achieve the grinding pressure. Note: For example, in a Ruberta wood grinder, 4.88 Grind-stone
is a cylindrical rotating part used in a wood grinder to grind logs into pulp. Its cylindrical surface is the working surface. It was originally made of natural stone, but now it is mostly made of artificial grindstones such as cement grindstone and ceramic grindstone (see 4.89). 4.89 Ceramic grind-stone is also called sintered grindstone, and its working layer is assembled from sintered ceramic blocks. 4.90 Sharpness of grindstone In order to determine whether the grindstone needs to be engraved to maintain the effect of grinding wood, a parameter value defined by Klemn's formula is: Sharpness of grindstone 5-Pulp pit humidity-Water temperature Mill pulp pit concentration
Where: S is a dimensionless parameter.
4.91 grinder pit
The pit under the grindstone of a grinder, used to receive the pulp ground by the grindstone and to cool and clean the surface of the grindstone uniformly. burring device of grind-stone 4. 92
A device used with a grinder to carve grooves of a certain shape on the working surface of the grindstone. 4.93 burr (grindstone dresscr) A cutting tool used in a grindstone device (see 4.92) to carve grooves of a certain shape directly on the working surface of the grindstone. 4.94 Disk Refiner
A machine that refines the material or pulp in the process of moving from the center to the circumference under the action of the high-speed rotating grinding disc (see 4.96). It can be divided into various types according to the number of moving discs (see 4.97). 4.95 Chip Washer
A device that removes heavy impurities and absorbs moisture from the material before it enters the disc grinder (see 4.94). 4.96 Grinding disc (disk grinding): A brush disc in the disc grinder that has the function of disintegrating and refining the material or pulp. The grinding disc (see 4.99) that is a whole mesh or divided into several fan-shaped pieces is directly or through a disc support to form a mesh disc and then assembled on a moving or fixed disc. Rotating plate of disc refiner 4.97
The grinding disc in the grinding brush of a disc refiner that is driven to rotate by a motor (see 4.96). 4.98 Static plate of disc refiner The non-rotating grinding disc in the grinding pair of a disc refiner. 4.99 Disc refiner plate A circular or shaped disc with grinding grooves (see 4.100) mounted on a circular disc to form a grinding disc (see 4.96). 4.100 Grooved pattern of disc refiner plate The grooves on the disc refiner plate (see 4.99) have different shapes according to the requirements of the refining, and the geometric parameters such as the square spacing, depth spacing, etc. Single disc refiner single disc refiner 4.101
A disc refiner with a brush grinding pair and only one dry-rotating moving disc (see 4.97) 4.102 Double disc refiner double disc refiner A disc refiner with a grinding pair formed by two moving discs (see 4.97) rotating in opposite directions. 4.103 Triple disc refiner A disc refiner with three grinding discs, two grinding brushes and a moving disc in the middle. It is mostly used for pulping. Its two grinding pairs are connected in series or in parallel. 4.104 Pulp washer
Equipment with three functions of filter pressing, diffusion and displacement, used to wash out the cooking or bleaching residue contained in the pulp, as well as to wash mechanical pulp, waste paper pulp, etc. It includes various types of filters with drum-shaped or belt-shaped filter surfaces that use vacuum, mechanical extrusion or liquid level difference as filtering power.
4.105 Thickener (decker) Various types of filters that dehydrate pulp to increase its concentration. 4.106 Washing press (for pulp) Pulp dewatering machine that uses mechanical pressure as filtering power, used for washing and concentrating pulp. Dilution factor
The amount of washing water introduced into the cooking or bleaching residue to wash a unit mass of pulp, that is, the difference between the amount of washing water added to the washing system during the pulp washing operation and the amount of water remaining in the pulp after washing, generally used to calculate the amount of water used for pulp washing. Displacement ratio of pulp washing 4. 108
The ratio of the actual reduction of dissolved solids in pulp after washing to the theoretical maximum possible reduction can be used to evaluate the washing effect of a washing section or a single washing equipment. 4.109 Drainer
A concrete tank-like structure with a filter bottom for intermittently washing pulp in a small paper machine. 4.110 Drum type vacuum washer A drum type vacuum filter used for milling, in which the drum with the filter screen is surrounded by a closed chamber that is divided on the circumference and is connected to the vacuum source connected to the vacuum distribution valve as the drum rotates to suck the full. 4.111 Horizontal belt type vacuum washer A pulp washer in which an endless belt and filter screen move horizontally on the surface of the vacuum filter box to filter and dewater the pulp. 4.112 Drum type pressure pulp washer drum type pressure wax her 55 || tt || QB/T1693--1993 || tt || A pulp washer in which the pulp outside the drum is filtered and dehydrated in the drum under the pressure of the pressurized air in the sealed tank shell. 4.113 Gravity suction pulp washer drum type gravity suction pulp washer The closed chambers separated on the circumference of the drum are discharged through their own individually configured inclined drainage pipes, and when the drum rotates, the drainage pipe mouth overflows and flows out of the drum bottom water surface to form a continuous suction filtration by the gravity flow of the liquid in the pipe under the potential difference to wash the pulp. Because of its characteristics that it does not require a distribution valve and uses the water level drop in the closed pipe for suction, it is also called a non-width pulp washer or a drop-type pulp washer. 4.114 Ring Diffusion Washer A pulp washer that works on the principle of continuous diffusion washing and is used at the top of an upflow bleaching tower (see 4.164). It is characterized in that the washing water is sent from a rotating washing pipe to a sieve ring that can be raised and lowered for pulp washing. The pulp is washed as the sieve ring rises, and the sieve ring can be quickly lowered for cleaning.
4.115Multi-stage counter-current washing systemMulti-stage counter-current washing systemA pulp washing system consisting of multiple pulp washing equipment in which the washing liquid and the washed pulp flow in the opposite direction. Each washing stage into which the pulp enters will be washed by the washing liquid from the following stage, and the pulp will be washed with warm water in the last washing stage before leaving the washing system. 4.116Disc vacuum filterA continuous filter consisting of multiple rotating discs forming a filter surface and a distribution valve connected to a vacuum source, used for pulp washing and white water fiber recovery.
4.117Screw PressweshcrA pulp dewatering and washing equipment that uses a variable diameter or pitch screw rotating in a circular or cylindrical filter plate to perform extrusion and dewatering operations, used for the recovery of hot boiling residues.
4.118 Twin-roll press washer A device that uses a pair of grooved rollers to press the pulp to extract high-concentration cooking residue and wash the pulp, also known as a grooved press. 4.119 Ecentrie drum press washer A pulp washing device that uses a small filter drum eccentrically installed inside a large filter drum to dewater by rotating and squeezing. 4.120 Cylinder decker A pulp thickening and dewatering device that uses a filter drum (round mesh cage) composed of a cage frame and a filter mesh as a filter element and uses the liquid level difference inside and outside the mesh cage as the main filtering power.
4.121 Open var type pressure thickener A round mesh thickener with a special structure of high liquid level and a filter drum groove. Note: For example, Kamyr thickener. 4.122 Double Mould Thickener Equipment that uses the mutual squeezing of two filter drums with different diameters and the position difference between the inner and outer filter drums to dehydrate the pulp. 4.123 Twin (Toulsle) Wire Thickener/Washer Equipment that squeezes and dehydrates the pulp between two endless nets, and can be used for wet pulping. 4.124
Screen
A machine that uses pressure difference, gravity, etc. as power to screen the pulp (see 3.9) and uses mechanical vibration or hydraulic pulses to keep the screen plate (see 4.125) clean to achieve continuous screening operations. 4.125 Screen Plate
A metal plate with round holes or long chain-shaped openings that can retain coarser materials when the material passes through. It can be made into a flat plate or a round drum. The latter is called a screen drum.
4.126 Accepted pulp
Pulp that passes through the screen plate in the pulp screen, or pulp that has been purified (see 3.10). Synonymous: Good pulp
4.127 Rejec1
QB/T 1693—1993
Pulp that is blocked by the screen plate in the pulp screen or discharged from the slag discharge 11 after purification (see 3.10). For screening and purification equipment, this part of the pulp is called consumable slag. The pulp that has a low fiber content and can be screened or purified again is often called tailings to distinguish it from the coarse slag that is discharged in the process flow.
4.128 Reenhale
In a broad sense, it refers to the aperture on the screen plate that performs the screening function, regardless of its shape and geometric structure: it also refers to the cylindrical or conical holes on the screen plate.
4. 129 Acreen cut, screen slot A narrow strip of long holes on the screen plate.
4.130 Percentage perforation of screen plate The percentage of the area of the screen holes (continued) on the screen plate to the total area of the screen plate. 4.131 Centrifugal screen A pulp screening machine that uses centrifugal force pulses to keep the holes on the screen plate unobstructed or to allow pulp to pass through the screen plate. There are many types. 4.132 A centrifugal screen model A The rotor generates centrifugal force and pulp flow pressure pulses to keep the hole chain on the screen drum unobstructed, and the qualified pulp is mainly driven by the pressure difference between the inlet and outlet pulp to pass through the centrifugal screen of the screen drum.
To: For example, Apmew belt.
4.133B centrifugal screen madelB The bladed rotor rotating in the fixed screen drum makes the slurry move forward in a spiral shape under the action of centrifugal force, and the qualified slurry flows out through the screen drum. The pressure difference between the inlet and outlet slurry also plays a role in driving the qualified slurry to pass through the screen drum. Note: For example, Biffar screen.
4.134C centrifugal screen model C The slurry introduced into the slurry distributor located in the center of the fixed screen drum by the central duct is thrown onto the screen drum by the centrifugal force of the blades on the rotor for screening. There are many types of centrifugal screens. For example, Cowan screen.
4.135CX centrifugal screen model CX The blades on the rotor generate centrifugal force and axial thrust as well as pumping pulses. It is an efficient C-type centrifugal screen. 4.136 Pressure screen prcssurescreen
Slurry passes through the screen drum or screen plate by conveying pressure, and the slurry does not contact the air during the selection process.
4.137 Pressure screen with rotary foils or vanes Pressure screen with rotary foils or vanes on the inside or outside of the fixed screen drum or on one side of the fixed screen plate to produce pressure pulses to keep the screen plate holes unobstructed.
4.138 Inward (outward)-flow pressure screen Slurry passes through the screen drum from the outside (inside) of the fixed screen drum, and the good slurry flows out from the inside (outside) of the screen drum. This mainly refers to the slurry flow direction of the rotary screen with only one screen drum.
4.139Double drum rotary foil screen.doublednimpressscreenwithrotaryfoils
A pressure screen with two concentrically arranged screen drums and two groups of rotating blades, which forms various combinations in terms of the relative positions of the rotor and the screen drum and the pulp inlet and the screen drum.
Stage (of pulp purification) &screening ar cleaning stage of accepted Btock4.140
The number of screening and cleaning times experienced by the good stock (see 4.126) in pulp screening and purification, calculated from the production of the good stock. The pulp screen used for the first screening of pulp is the first stage screen.
4.T41Segment (of pulp screening and purification) screening or cleaning stage of reject stock The number of screening and cleaning times experienced by the tail stock (see 4.127) in pulp screening and purification, calculated from the production of the tail stock. The pulp screen used for the first 57
screening of pulp is the first stage screen. QB/T1693--1993
4.142·Gain type two-stage series single drum pressure screen Eor screening inscries
Pressure screen that performs two-stage screening operations in sequence on the upper and lower sections of the same screen drum. It draws out the first-stage coarse or pulp section and the second-stage submerged pulp, and the outlet pulp flow pressure is slightly higher than the inlet pulp pressure. Note: The word is PSV type positive force screen.
4.143 Rotary drum type pressure screen rotary drum type pressure screen is composed of a fixed blade group and a rotating screen drum, which realizes the first-stage sedimentation separation and the second-stage screening. Horizontal pressure screen pressure screen with horizontal shaft4.144
Pressure screen that uses the pressure pulse formed by the blades rotating on the horizontal axis to clean the vertical slow circular screen plate. 4.145 Wormknotter
A coarse screening device in which a circular cylinder with screen holes rotates to make the pulp move along the spiral baffle plate and remove coarse impurities. 4.146 Inward (outward)-flow vibrating sereen A type of pulp screening machine that uses the perturbation of the screen drum or pulp trough to keep the holes or slots on the rotating screen drum unobstructed. 4.147 Rotary screen with low frequency vibrating trough A type of internal flow pulp screening machine, the screen drum rotates in the pulp trough, and its screen holes or slits are kept unobstructed by the low frequency vibration of the pulp trough and the water spray pipe outside the pulp surface.
4.148 Rotary screen with low frequency vibrating drum A type of external flow pulp screening machine, the holes on the rotating screen drum in the pulp trough are kept unobstructed by the low frequency vibration of the screen drum itself and water spray. 4.149 Rotary screen with high frequency vibrating trough A type of internal flow pulp screening machine, the screen drum rotates in the pulp trough, and its holes and slits are kept unobstructed by the high frequency perturbation of the pulp and water spray. 4.150 High frequency rotary screen A type of internal flow pulp screening machine, the rotating screen drum in the pulp trough simultaneously makes high frequency sweeping motion to keep the holes unobstructed. Low-profile diaphragm screen diaphragm screen
A kind of open pulp screening machine in which the hole chain of the flat screen plate located in the pulp tank is kept unobstructed by the recoil of the pulp flow due to the low-particle vibration of the diaphragm at the bottom of the pulp tank
4.152 High-frequency vibrating screen highfrequency vibrating screen A kind of open pulp screening machine in which the holes of the screen plate fixed on the screen frame are kept unobstructed by the high-frequency vibration caused by the eccentric weight on the rotating shaft in the middle of the screen.
Previous: Jansson screen.
4.153 Low-frequency frame type knot remover vibrating knotter A flat screen plate with sieve holes is kept unobstructed by low-frequency vibration at one end. It is a device for removing pulp knots. It is mostly used in wood pulp production. Sand table, sind trap, riffler4.154
A kind of open channel or groove that removes heavier impurities from paper stock by sedimentation principle. It can be a water filter structure or a wooden structure.4.155 Vortex cleaner Vortex cleaner is referred to as a deslagging device or desander. It uses the vortex flow to remove the different impurities in the pulp. A hydraulic separator that separates materials by centrifugal force to remove heavier or lighter impurities. It has many types, and its common feature is that it has no power parts. Note: For example, CenLriclerner separator. 4.156 Cylindrical vortex cleaner A full-flow cleaner in which the slurry flow is separated by impurities in a cylindrical body, and the heavier impurities flow along the bottom of the wall through the small holes on the partition into the collector surface and are discharged upward from the center outlet. Note: For example, Vurtaj cleaner. 4.157 Canical vortex cleaner 58
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