HG/T 20535-1993 Chemical solid material loading and unloading system design regulations
Some standard content:
Industry Standard of the People's Republic of China
Design Specification for Loading and Unloading System of Chemical Solid MaterialsDesiga Tegulatisea for loading and unloading solid materialsH20535-93
Main Editor: The Sixth Design Institute of the Ministry of Chemical Industry
Approved by: Ministry of Chemical Industry
Implementation Period: October 1994-1994
1 General Provisions
1..1 These provisions apply to the design of solid material handling systems for new or expanded large-scale chemical enterprises.
1.0.2 The loading and unloading method shall be determined by the material handling system, production scale, mechanization level and the inspection method.
1.0.3 Efforts should be made to improve the level of mechanization and automation of loading and unloading systems. We should avoid the tendency to pursue high levels of automation without considering investment effects, and avoid the tendency to adopt large-scale manual labor without considering the working conditions and intensity of operators.
1.4 Loading and unloading system equipment should give priority to high-quality products that meet national standards and national standards: the performance of the equipment should be adapted to the material characteristics (such as the performance of the parts, the performance of the parts, the load resistance, etc.). The selection of equipment should not only consider the investment, but also the reliability of operation, service life and maintenance costs. 1.0.5 For the loading and unloading of the same type of goods, the same type of standardized products should be selected as much as possible to facilitate maintenance and technical management. When the loading volume is not large, the variety of goods is large and the factory adopts more than one type of transportation, it is recommended to develop a multi-functional equipment to expand the scope of use of the machine to cope with the operation of a variety of goods.
1.0.6 The design of the loading and unloading system should take into account the dynamic relationship between loading and unloading, transportation and storage. For enterprises with multiple modes of transportation, the loading and unloading machinery and personnel should be uniformly equipped with unified auxiliary facilities and living facilities to improve the labor productivity and operation efficiency of the loading system.
1.0. In addition, for flammable, toxic, radioactive and dust-generating chemical materials, the regional layout and system design of the loading system should comply with the current <Regulations on Fire Prevention and Fire Prevention of Refining and Chemical Industry Design, Regulations on Fire Prevention of Buildings and Dangerous Goods Transportation> and <Regulations on Safety and Health of Chemical Powder Engineering Design>. 1.0.8 It also stipulates that if there is a conflict with the relevant standards and regulations issued by the state, the national standards and regulations shall be followed.
1.0.9 The standards adopted in this regulation are:
JTJ212
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2 Railway Loading and Unloading
2. 1—The most important regulations
2.1.1 Chemical enterprises transporting chemical solid (raw) fuels by railway should set up heavy vehicle lines, loading and unloading operation lines, empty vehicle lines and locomotive running lines according to the operation requirements agreed with the railway department. If necessary, they should also set up empty vehicle routine inspection lines, spare vehicle storage lines, vehicle temporary inspection lines, "no flipping" vehicle unloading lines, track weighing lines and unloading lines. When conditions are appropriate, the unloading yard should be arranged in the form of heavy vehicle line, unloading equipment, empty vehicle line, and joint layout (i.e., quality general layout). ). The loading and unloading operation shall not be located on the side road. The minimum load is greater than 2.5%. 1.1.2 The loading and unloading buildings (structures) shall comply with the railway construction limits (GB146.2-83). The loading machinery shall not enter the locomotive vehicle limits (GH146.1-83) when not in operation. 2.1.3 The unloading capacity of raw materials and fuel and the loading capacity of finished products shall be determined according to the one-time entry and exit vehicle regulations and the temporary stay time allowed in the factory stipulated in the "railway construction agreement". If there is no agreement, the following parameters can be used to determine: 2.1.3. [The number of railway vehicles entering the factory is calculated using the following formula: K...Q.
The number of railway vehicles entering the factory at one time, vehicles (large factories do not transport more than 60 vehicles at most), M.-
The annual transportation imbalance coefficient is generally taken as 1.2--1.5N.-The number of vehicles entering the factory per month, generally taken as 1~2 times; Q-the average net load of the truck, t (take 501) S1
Q, annual transportation quantity t:
J), annual planned transportation number.
2.1.3.2 The allowed stay time of railway vehicles in the factory is 4: for unloading of raw materials and fuel. The number of vehicles for loading and unloading is:
2.14 When the unloading line is also used as the train inspection line, it is not suitable to use a high platform, otherwise a straight path for train personnel to pass should be set up.
2.1.5 When the extended car can pass the unloading device, the unloading delay control should consider the important results of the car passing through the unloading device, and the plan should be approved by the Ministry of Railways, and the prohibition of the car passing through the unloading device should be reviewed. 2.1.6 The entry of the river car operation area should be equipped with a "missing track" signal, and whether the soft track transmission and unloading machinery are equipped with a closed device or derailer should be considered according to the specific situation. 2.1.7 Determine the length of the track tracking of the unloading machine. If there are more than two unloading machines on the same track, the length of the track occupied by one of the unloading machines should be considered. 2.1. Design the unloading platform or variable material platform for unloading with separate train groups: the effective length of the platform or receiving core is 5-7 times longer than the length of the train: the train group can unload the car at the same time. 2.2 Bulk material unloading platform
2.2.1 The dimensions of the unloading platform should generally meet the following requirements: 2.2.1. The roadbed should be higher than the two sides. When the two sides of the floor are used as the receiving site, the height from the hot pool surface to the two floors is 1.5m for one-time unloading and 2.5m for two-time unloading.
2.21.2 The width of the expressway roadbed is 2.0~2.4m. When using K1XDG type bottom door vehicles, it should not be less than 2.2m.
2.2.1.3 The central angle between the wall and the floor should be 0.0°, and should not be less than 75° under any circumstances
2.2.1.4
Find a platform to get rid of the two sensitive lines and set up the concrete floor: the width is 4.~Em.
2.2.2 When the platform is set up on both sides to receive materials, the width of the platform surface should be 1.5m larger than the grab bucket width. 2.2.3 If a large unloading platform is required, a pedestrian and mechanical crossing passage should be considered according to its physical conditions. Unloading work should be carried out at railway crossings and fast roads where pedestrians pass by: 2.2.4 Some thawing facilities can be set up in production areas and special materials as needed. 2.2.5 Various loading and unloading platforms should be equipped with sound and light signal switch buttons.
2.2.6 A rest room for operators and an engineer's station should be set up near the loading and unloading device. 2.3 Selection of bulk material unloading method
2.3.1 Loading with a movable scraper (belt) conveyor, and short-distance loading. Generally, the comprehensive production capacity of a single device is 50--100t/h. 2.3.2 The production capacity of a chain loader is 300--120t/h. 2.3.3 Loading across the railway in the silo is suitable for loading materials with special lines in the factory area, such as pyrite slag, boiler slag, coke, etc.
2.3.4 The selection of bulk material jumping method should comply with the provisions of the original design plan of chemical mechanized transportation:
2.3.5 When using a dumper to unload, a rotary car or a chain bucket oxygen car should be equipped as an auxiliary car.
2.3.6 Factories that use bottom-opening trucks to transport materials must reserve space for screw unloading machines.
2.3.7 When using a bucket truck to unload large materials, it is advisable to use a belt chain bucket truck.
2.3.8 When using a screw unloading truck with a relatively large size and relatively high material, the rotating blades should be made of welded wear-resistant materials.
2.3.9 The selection of grab bucket bridge cranes shall be based on the provisions of the 53 regulations for the design of the storage yard and warehouse.
2.3.10 The number of loading and unloading machinery shall be determined by calculation and selection in accordance with Appendix A of these regulations. 2.4 Selection of loading methods for packaged goods
2.4.1 Large and medium-sized chemical plants can load 25-50kg bagged goods. When the loading capacity is less than 350 kg per day (one time), a loading machine can be used. The production capacity of the loading machine and the allowable stay time of the whole vehicle are determined by the loading capacity of the whole vehicle. When selecting the model, attention should be paid to matching the capacity of the loading machine with the capacity of the transportation system. 2.4.1 When the loading capacity of small and medium-sized chemical plants for loading 25-50kg bagged goods is less than 350 kg per day (one time), a chartered vehicle can be used: 3.4.3. Large-scale vehicles use loaders for centralized loading. According to the number of vehicles coming at one time and the allowed vehicle stay time, more than 4 loaders are required. If the total loading capacity cannot be met, a mobile belt conveyor can be used as an auxiliary equipment for the loaders. For small-scale vehicles with small loading volume, in order to reduce the dynamic strength, a mobile belt conveyor can also be used. For loading and unloading, a bridge-type hook crane can be used for the goods that are collected or grouped by network or group. For platforms with large layout, a gantry crane can be used. For lifting, large and medium-sized factories use bridge cranes, and small factories can use electric single-case cranes. In order to save investment width, mobile serpentine cranes can be selected when there are several common loading and unloading facilities for goods. 24.5 For piece goods that are stacked on pallets using automatic or semi-automatic stackers or manually, it is advisable to use manual transportation and loading operations: when the pallets are separated and loaded into the truck, if the amount of goods loaded is less than or equal to 1, a forklift can be used to load directly, and the loading and unloading operations can be carried out directly in the car compartment. The forklift used in the industry should have a small turning radius, and the lifting weight should generally not exceed 1.5t. When the pallet is not full or the goods are only loaded on a few trucks, a combination of forklift transfer and manual unloading can be used.
2.4.6 When unloading small bagged and packaged chemical goods from the truck, a double truck, battery truck, vertical mobile belt conveyor and manual unloading can be used. The selection principle of the truck is 2.4.5
2.4. When loading small chemical materials in barrels or boxes, the loading method should be standardized. Quantity, the weight of each piece is reasonable to select the loading plan. If there are conditions to use the truck for direct loading, the truck loading plan should be used first.
2.4.8 When using a crane to load and unload trucks! When using a truck to load piece goods in barrels, special lifting equipment should be equipped to improve loading and unloading efficiency. 2.4.9 Forklifts are used to transport piece goods. The horizontal transportation distance is less than 150 meters. For long-distance high transportation, it is advisable to use a trailer truck.
2.4.10 The selection of forklifts should be based on the provisions of the bulk yard warehouse design regulations 3. 1. 5 Process layout
2.5.1 Dirty regulations
2.5.1.1 Industrial storage must ensure that the process is reasonable, convenient and safe to operate. Considering the operation, maintenance, installation and maintenance of the equipment, strive to be tight and neat. 2. 5. 1.2 The clearance height of corridors, storages, staircases, etc. in buildings shall not be less than 2.2m.
2.5.1.3 The clearance of all equipment shall not be less than 1rl, and shall not be less than 0.8m when it is difficult to arrange.
2.5.1.4 When the length of underground receiving ladders, lower corridors, etc. exceeds 60m, stairwells shall be provided at both ends.
2.5.1.5 Where there is a possibility of endangering the operation The exposed rotating equipment or parts should be equipped with safety guards or fences.
2.5.1.6 When the mobile power supply is from the sky line + the transmission line should be higher than the ground (or level>2.6, the mobile equipment is generally powered by a reel cable and has a 55-degree connection with a shallow head.
2.5.1. When the water level is high or the terrain is suitable, it can be used as a ground measure. 2.5.2 The layout of the tipping machine should meet the following requirements: 2.5.2.1 The tipping machine and its shunting system should be selected according to the year, type, size, required tipping capacity, power quality, and line configuration factors: The full car system should strive to have fewer links, be safe and reliable, and try to avoid vehicles when there are accidents. When the pressure release method is adopted, in addition to ensuring that the release is in place, the empty car shunting speed and the loaded car (or the release speed when the empty car> the stopper) should be less than the allowed safety value of the vehicle and the stopper.
2.5.2.2 The shaving machine room is generally equipped with a 15/3t electric straightening bridge crane. The crane can be effectively located on the transmission side of the east village. 2.5.2.3 The tipping machine and its shunting system should have a separate control room. In addition, a communication station should be set up at an appropriate location on the ground: the control room and the observation area should be equipped with corresponding lighting and sound signals: the tipping machine control room is generally located at the vehicle entrance. It must be closed and equipped with air conditioning (single cooling) device:
2.5.2.4 The moving car is close to the control system, but the clearance net outside the outdoor area of the tipping machine should not be less than 1500~2000m
2.5 2.5 When the transmission is in progress, the steel wire rope and the retracting wheel should be tension-resistant. 2.5.2.6 The dumper room should be equipped with installation holes leading to the dumper. The bottom floor should be equipped with electric single-travel vehicles and automatic reeds with a weight of not less than 31 kg. 2.5.2.7 Two receiving hoppers should be installed under each dumper. The total length of the material hopper along the railway line should not be less than 14m, and the total weight should not be less than 120t. The material should be relatively stable. The angle is greater than 15° and the coal should not be less than 60°. A plate must be added to the top of the receiving hopper. The hole size is 400mmX-0(mm-600mmX600mm-2.5.3. The process layout of the screw unloading machine must meet the following requirements. 2.5.3.1 The bridge type screw unloading machine used for single-track railway is generally 56
8000m, and the bridge type screw unloading machine used for double-track railway is generally 1000m. 155ctmm or: 2500mm
2.5.3.2 The engine room of the unloading vehicle should be located on the opposite side of the self-sliding line. The engine room door should be equipped with a safety interlock and the door should be kept closed during driving. The engine room should be equipped with an air conditioner. 2.5.3.3 Depending on the number of fuel tankers, a maintenance span for the unloading vehicle should be set at one or both ends of the material, and lifting equipment and lifting holes should be installed. The maintenance span can be appropriately raised to provide space for the construction of the fuel tank unloading vehicle. 2.5.3.4 In addition, a gas walkway can be set up, with a total length of 700m, and the column should not be less than 410mm
1.5.4 The layout of the bridge crane should comply with the provisions of the "Bulk Material Yard and Warehouse Design Regulations".
2.5.5 The layout of the bridge and gantry crane should be in accordance with the design regulations and regulations of the bulk material yard and warehouse. | |tt||2.5.6 The original material addition process shall meet the following requirements: 2.5.6.1 When the effective length of the material is less than the length of one car, it should not be greater than 1/2 of the length of the incoming train. When the continuous line type coal is adopted, the annual line length is generally 10 car lengths, and the maximum length is greater than the length of the incoming train. 2.5.6.2 According to the arrangement of the belt conveyor, the receiving surface is divided into the following three categories:
. Single track single belt conveyor - single track, with a temporary belt conveyor and a belt conveyor output gear configured on the material track, one of which is used as a spare
b. Single track double belt conveyor - single track, with two belt conveyors installed, each belt conveyor is equipped with a feeder, and six equipment are used. c. Double-track double-belt conveyor double-track railway - simultaneous unloading, there are belt conveyors in the gear, and each belt conveyor is equipped with a feeder for single use. d. The three types of materials mentioned above are divided into two types: scraping material and side scraping material. There are six basic types in total. Please refer to Appendix B for the specifications of each type of materials.
2.5.6.3 The main dimensions of the chain test material are generally: single-line nominal width ti500mm, upper construction span 9000mm: double-line material upper width 13001 railway line 6206500m material sugar cane construction span 15000mm,
2.5.6.4 The upper filling distance of the material is generally 6000mm. When the material is pushed into the powder by a spreader, the column distance is generally not less than 7000mm. When the upper structure is closed and the locomotive passes through, the roof should be buried: 1.5.6.5 The inclination of the trough wall is generally not less than 60°, the inner wall and the lower bearing surface should be smooth and resistant to electricity, and the corners inside the sugar can be smooth. The clearance between the nozzle and the hopper can be 60mm. The clearance between the outer edge of the hopper platform and the impeller feeder can be 100mm. The top of the beam inside the material pusher should be a three-dimensional cross-section, with a slight cut at the bottom of the beam, and the angle between the sharp angle slope and the horizontal plane is 6° to prevent pre-accumulation of materials on the beam. The lower part of the two end screens of the trough should be inclined inward, and the support surface should be about 100mm above the lower edge of the two end wall to prevent the material blocks from falling to the ground. 2.5.66 A walkway should be set on the upper part of the trough. The width of the walkway on both sides of the single-track trough should not be less than &Hmm; the width of the middle walkway of the double-track trough should not be less than 120mm, and the height of the walkway on both sides should not be less than Ro0mm, and the walkway height should be 30mm. 2.5.7 The rail surface is 400mm higher than the rail surface. 2.5.6.8. When the vehicle needs to be manually opened and closed and the bottom needs to be cleaned, the size of the hole (the effective size at the joint of the civil engineering structure) is generally 200m. When there is no need to close the door and the method, the minimum size can be determined according to the maximum temperature of the incoming material. Z.5.6. There should be a single-throw type hoist for the feeder rail at both ends of the underground part. 2.5. The net width of the main running channel of the 10-material belt conveyor should not be less than 1500mm (partial width should not be less than 7Hmm), and the net width of the pick-up passage should not be less than Less than 58
700mm. The minimum clearance distance between two impeller feeders in parallel position shall not be less than 600mm.
2..7 Storage warehouse loading process layout shall meet the following requirements 2.5.7.1 The total effective storage capacity of the loading warehouse shall generally be 1.2~1.5 design load. Anti-blocking bag and variable pick-up device shall be provided for materials with different properties. 2.5.7.2 The intersection angle of the storage warehouse wall can be increased by the following formula: +(10°--15\)
Where? - The static friction angle between the material and the bottom of the warehouse, (2.5.7. 2)
2.5.7.3 The shape and size of the storage unloading port should be determined according to the size and moisture content of the material and the required loading capacity. The shape of the unloading port is generally square, but it can also be rectangular or shaped. The minimum size of the square unloading port can be calculated using the following formula: R=K(-80)tg
The side length of the square unloading port, m
(2.5.7.3)
K-empirical coefficient, for external materials, use =2.F, for non-secondary materials (raw coal), use K-2.4;
uThe maximum size of the material block mm;
The static positive angle of the material can be used instead.
4The capacity of the loading equipment on the loading line can be used to meet the requirements when the internal loading 2.5.7. 4
Requirements for completing a group of cars. The time required to complete the loading of a group of cars is calculated based on the characteristics of the car. The section shall not exceed 20,000, and the 100~20Ct track shall be used for measurement. 2.5.7.6 Under the premise of ensuring the number of loading points in 2.5.7.4, single-point loading is generally adopted, and multi-point loading can also be adopted.
2.5.8 The layout of the surface unloading platform process should meet the following requirements: 2.5..1 The high-speed platform from the flat-top to the platform plane is mainly determined according to the type of bulk car. The 1.8m high platform is used for 301 micro-cars and its upper side plate is used for loading: 2.5m.2.8ra.3.3m Each track is used for 35t, 50t, GDt cars and does not put down its 59
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