Some standard content:
ICS13.030.50
Machinery Industry Standard of the People's Republic of China
JB/T9054-2000
Centrifugal dust collector
Centrifugaldustcollector
Published on April 24, 2000
State Bureau of Machinery Industry
Implementation on October 1, 2000
JB/T9054-2000
This standard is a revision of JB/T9054-1999 (ZBJ8800989) "Technical Conditions for Centrifugal Dust Collectors". Compared with JB/T9054-1999, the main technical content of this standard has changed as follows: - In view of the fact that this standard is a product standard, the name of the standard has been changed from "Technical Conditions for Centrifugal Dust Collectors" to "Centrifugal Dust Collectors"; - Added the expression regulations for model specifications: The technical indicators of high-efficiency centrifugal dust collectors and ordinary centrifugal dust collectors are given; - Modified the test method and proposed specific test conditions; - Supplemented the content of manufacturing technical requirements and acceptance rules. This standard replaces JB/T9054-1999 from the date of implementation. This standard is proposed and managed by the Technical Committee for Standardization of Mechanical Dust Removal and Harmful Gas Treatment Equipment of the Technical Committee for Standardization of Environmental Protection Machinery.
The main drafting units of this standard are: Donghua University (formerly China Textile University), Xi'an University of Architecture and Technology, the Sixth Design Institute of the Ministry of Machinery Industry, the Fourth Design Institute of the Ministry of Machinery Industry, and Taicang Dust Removal Equipment Factory, Jiangsu Province. The main drafters of this standard are: Shen Henggen, Kang Yanming, Gao Honglan, Xue Mingshan, and Lu Weiguang. This standard was first issued in March 1989 as ZBJ88009-89, and the standard number was adjusted to JB/T9054-1999 in April 1999. 1
1 Scope
Machinery Industry Standard of the People's Republic of China
Centrifugal dust collector
Centrifugal dust collector
JB/T9054-2000
Replaces JB/T9054-1999
This standard specifies the definition, type and model specification representation method, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of centrifugal dust collectors.
This standard applies to the design, manufacture, quality inspection and use of hand centrifugal dust collectors. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are all valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest version of the following standards. GB/T 699—1999
GB/T7001988
GB/T 985—1988
GB/T986—1988
GB/T1800.3—1998
GB/T1804—1992
GB/T 6414—1986
GB/T9079—1988
GB/T12138—1989
GB/T13306—1991
JB/T53133—1994
3 Definitions
High-quality carbon structural steel
Carbon structural steel
Basic forms and dimensions of weld grooves for gas welding, manual arc welding and gas shielded welding Basic forms and dimensions of weld grooves for submerged arc welding Basis of limits and fits Part 3: Table of numerical values of standard tolerances and basic deviations General tolerances Unspecified tolerances for linear dimensions
Dimensional tolerances of castings
Methods for testing smoke from industrial furnaces
Performance test methods for bag dust collectors
Quality classification of mechanical rotary back-blowing bag dust collectors This standard adopts the following definitions.
3.1 Centrifugal dust collector centrifugal dust collector is a device that uses the dust-laden airflow to change its direction to generate centrifugal force to separate and capture dust particles. 3.2 Dust collection efficiency collection efficiency Under certain working conditions, when the dust-laden airflow passes through the dust collector, the ratio of the amount of dust captured in the same time to the amount of dust entering (mass method), or the ratio of the difference between the amount of dust entering and the amount of dust discharged to the amount of dust entering (concentration method), expressed as a percentage. 3.3 Pressure drop pressure drop: resistance resistance When the dust-laden airflow passes through the dust collector, the absolute value of the total pressure difference between the inlet section and the outlet section of the dust collector, unit Pa. 3.4 Specific consumption of steels required Approved by the State Bureau of Machinery Industry on April 24, 2000 Implementation on October 1, 2000
JB/T9054-2000
Ratio of the mass of steel consumed by the centrifugal dust collector body (the mass of the equipment between the inlet and outlet flanges of the dust collector and above the ash outlet flange) to the amount of gas processed, in kg/kNm/h or kg/km/h. 4 Types and model specifications
4.1 Types
Centrifugal dust collectors in this standard include: Tangential flow reversal cyclone dust collectors with tangential or axial air intake and reverse airflow exhaust and their combined dust collectors: Direct current cyclone dust collectors with tangential or axial air intake and direct current exhaust and their combined dust collectors: Cyclone dust collectors with multiple tangential airflows to enhance the rotation of the main airflow.
4.2 Model specifications
The model specifications of centrifugal dust collectors can be expressed according to the model specifications used by the manufacturer, but the prefix should be added with "C" and a brief description of the model should be given.
Expression method:
Drum diameter, dm
The number of units in the dust collector (single drum can be omitted) Manufacturer model expression
Centrifugal dust collector
4.3 Basic technical parameters
Dust collector drum diameter, gas volume, applicable temperature, dust removal efficiency, pressure loss or resistance, steel consumption rate. 5 Technical requirements
5.1 Implementation conditions
The dust collector shall comply with the requirements of this standard and shall be manufactured and inspected in accordance with the drawings, technical documents approved by the prescribed procedures and the agreement between the supply and demand parties. 5.2 Dust collector performance requirements
5.2.1 High-efficiency centrifugal dust collector
Under cold test conditions, the dust removal efficiency is measured to be above 95% with a pressure loss below 1600Pa, and the air leakage rate is not more than 2%. 5.2.2 Ordinary centrifugal dust collector
Under cold test conditions, the dust removal efficiency is measured to be above 80% with a pressure loss below 1000Pa, and the air leakage rate is not more than 2%. 5.2.3 The engineering application technical parameters provided by the dust collector performance should explain the technical conditions of the test: temperature and humidity of the dust-laden gas, type of dust entering the dust collector, dust concentration, density and dispersion of the dust, etc. 5.3 Manufacturing technical requirements
5.3.1. Materials
Select appropriate materials for dust collector processing according to different use occasions and conditions. Metal materials should comply with the relevant provisions and design material selection requirements of GB/T699 and GB/T700. For capturing coal smoke, casting production dust, cement dust and other dusts with high hardness, wear-resistant measures should be adopted in the parts of the contact surface with dust-containing air flow velocity greater than 15m/s. Anti-corrosion measures should be adopted for dust removal of highly corrosive dust-containing gases. 5.3.2 Steel plate parts
JB/T9054-2000
Steel plate parts meet the requirements of the drawings. When the basic size is greater than 80 to 1600mm, its tolerance meets the IT13 level in GB/T1800.3: when the basic size is equal to or less than 80mm, its tolerance value is 0.5mm; when the basic size is greater than 1600mm, its tolerance value is 2.5mm. The minimum width of steel plate splicing shall not be less than 300mm, and the misalignment of the splicing is not allowed to exceed 20% of the plate thickness. The spliced steel plate should be leveled, and the flatness deviation of the steel plate shall be less than 1.5% per meter and the total length shall not exceed 5mm. Diagonal deviation of square parts: When the diagonal size is less than 1000mm, the difference between the two diagonals is less than 3mm; when the diagonal size is equal to or greater than 1000mm, the difference between the two diagonals is less than 5mm. 5.3.3 Flange
The sides of the rectangular flange must be kept straight, and the flatness deviation is less than 1.5% per meter. The diagonal length deviation of the rectangular flange shall be as specified in Table 1. The difference between the maximum inner diameter and the minimum inner diameter of the circular flange shall be less than 5% of the flange inner diameter, and the maximum deviation shall be less than 5mm. The gap between the flange inner diameter and the pipe is less than 1mm, and the outward flange of the angle steel flange shall not exceed 2mm. The surface roughness of the flange hole shall not be greater than the pregnancy. The center circle diameter of the circular flange bolt hole, the chord length deviation of the two adjacent bolt holes is ±0.6mm, the chord length deviation of any two bolt holes of the flange is as specified in Table 2, and the center distance deviation of the two bolt holes of the rectangular flange is as specified in Table 3. The deviation between the center of the circular flange bolt hole and the center of the flange inner diameter is less than 2.0mm for rolled flanges and less than 3.0mm for gas-cut flanges.0mm. The surface roughness of the flange outer edge shall not be greater than V. Table 1 Diagonal length deviation of rectangular flange
Length dimension L
Length deviation
Bolt hole center circle diameter D
Chord length deviation
Hole spacing design dimension S
Center distance deviation
5.3.4 Coil
≤500
≤250
>500~1200
>1200~2 000
>2000-3150
Table 2 Deviation of center distance between any two bolt holes of circular flange≤500
>500~1200
Table 3 Deviation of center distance between any two bolt holes of rectangular flange>250~500
>500~1000
>1000~3150
The inner diameter deviation of circular coils shall comply with the provisions of Table 4. The difference between the maximum inner diameter and the minimum inner diameter on the same section of the frustum-shaped coil shall be less than 5% of the designed inner diameter. The end face misalignment of circular and frustum-shaped coils shall be less than 2.0mm. The depth of the coil correction hammer shall not exceed 0.5mm, and there shall be no more than three hammer marks in every 2500cm2 of the cylinder part and every 200cm2 of the cone part. Table 4 Inner diameter deviation of circular coil
Inner diameter D of cylinder
Inner surface radius deviation
5.3.5 Assembled parts
≤500
>500~1200
Before assembly, first check whether each component meets the requirements of the drawings and technical conditions. Unqualified components shall not be assembled. The coaxial variation deviation of assembled coaxial parts shall not exceed 3% of the inner diameter of the cylinder and shall not exceed 5.0mm. The parallelism deviation of the parts with parallel axes is required to be less than 2.0mm. The overall dimension deviation is generally in accordance with the IT17 level of GB/T1800.3-1998. The deviation of each flange surface perpendicular to the main axis of the dust collector or the pipe is less than 1% of the flange outer diameter (less than 100mm is calculated as 100mm, and the rectangle is calculated as the long side). The weld gap of the assembled parts shall meet the requirements of GB/T985, and the maximum shall not exceed 2.0mm. The surface of the assembled parts shall not have obvious hammer marks, knocks and bumps.
5.3.6 Welded parts
JB/T90542000
Welding shall comply with the relevant provisions of GB/T985 and GB/T986. The height of the protrusion of the weld is less than 1.0mm. The height of the weld after grinding to remove defects or mechanical damage shall not be lower than the parent material. The slag on the weld and the spatter on the surface of the weld must be removed. The welding deformation caused by welding shall not exceed the allowable dimensional deviation of the weld, otherwise it shall be corrected. 5.3.7 Castings
Castings shall comply with the relevant provisions of GB/T6414. For welding between metal parts of different materials, attention should be paid to the selection of welding rods and the adjustment of welding methods. Cracks must be repaired by welding.
5.3.8 Wear-resistant layer
The wear-resistant layer of the dust collector shall be processed strictly in accordance with the design drawings and process requirements. It must be ensured from the structural point of view that the wear-resistant layer of the dust collector will not have penetrating cracks or fall off during transportation. The wear-resistant layer shall be made into physical test blocks according to the required shape and size for inspection. The thickness of the wear-resistant layer of the dust collector lining is not allowed to have positive deviation, and the maximum negative deviation shall not exceed 3mm. The surface of the wear-resistant layer after laying must be smooth, and no obvious bumps are allowed. The local bump amount C shall meet the requirements of Table 5. For the longitudinal joints of the wear-resistant layer, when the diameter of the cylinder is less than 1.0m, there shall be no more than two; when it is greater than or equal to 1.0m, there shall be no more than three. The maintenance shall be carried out strictly in accordance with the process requirements, and the surface of the wear-resistant layer after maintenance shall not have dust or cracks. If conditions permit, lay the masonry on site as much as possible. Table 5 Local concave and convex amount of wear-resistant layer
Inner diameter of wear-resistant layer D
Local concave and convex amount C
5.3.9 Painting
≤500
>500~800
The dust collector can be painted only after the quality management department of the manufacturer has passed the various manufacturing quality inspections. The painting quality should comply with the relevant provisions of JB/T53133. The temperature resistance of the selected paint should meet the use temperature. The dust collector shipped in sections can be unpainted within the area of 100mm from the edge of the weld groove. The inner surface of the dust collector and the inner surface of the parts shipped as a whole with the dust collector can be unpainted. Before painting, the metal surface should be dry, and oil, rust, welding spatter, burrs and other debris that affect the quality should be removed. Painting work should be avoided under the scorching sun, rain, snow and dense fog. The coating on the outer surface of the dust collector should be uniform and should not have defects such as bubbles, cracks and peeling. The outer surface of the dust collector is painted with one layer of anti-rust paint, one layer of primer and one layer of topcoat. The latter layer of paint should be applied after the previous layer of paint is dry. 6 Test method
6.1 Wear-resistant layer
Each batch of wear-resistant layer raw materials used should have a quality inspection report from the quality inspection department, requiring that its compressive strength and wear resistance should not be lower than the performance parameters required by the material. When spot checking the wear-resistant layer of the dust collector, the strength test can be carried out on the physical test blocks made with the same formula and process.
When spot checking the wear-resistant layer of metal parts, the material test blocks of the same batch of finished products can be tested. 6.2 Welded parts
For welds with high air tightness requirements, kerosene permeability tests of not less than 5% of the weld length should be carried out. During the test, the side of the weld that can be inspected should be cleaned and smeared with white powder slurry. After drying, kerosene should be applied on the other side of the weld to make the surface sufficiently wetted. After 30 minutes, there is no oil stain on the white powder to be qualified. The number of repairs of welded parts shall not exceed two times. 6.3 Performance test
6.3.1 Cold performance test
JB/T9054-2000
For the cold performance test, refer to GB/T12138 to make the test bench pipeline, measuring points and install the dust collector to be tested. The pressure loss test of the dust collector can be directly tested with ambient airflow. The dust removal efficiency test adopts the mass method. The dust generation should be carried out after the system has been running for more than 2 minutes without dust generation and the dust collection has been cleared. The variable load dust removal efficiency test should be carried out from high to low according to the amount of gas processed. The dust particle size distribution measurement results must indicate the measurement method. The dust analysis for testing the classification efficiency must use the same measurement method. The cold test dust should use 325 self-medical talcum powder with a mass median diameter of 8~12um. For specific engineering applications, dust similar to the use conditions can also be used, and the dust mass median diameter should be less than 15um. It should be dried before use and cooled to room temperature in a closed container with a dehumidifier for standby use.
The cold test benchmark working condition of the dust collector is: room temperature, relative humidity below 70%, the test dust is 325 mesh medical talcum powder, and the inlet concentration is 3~5g/m.
6.3.2 Hot performance test
The hot performance test of the dust collector is carried out in accordance with GB/T9079. The measuring point should be set at the cross section of the stable airflow section. The dust removal efficiency test adopts the concentration method and ensures constant speed sampling. During the test, the measuring working condition should be stable and the load fluctuation should not exceed 5%. The test results should refer to the technical conditions for the operation of the system given in 5.2.3.
7 Inspection rules
7.1 Inspection items
The dust collector inspection is divided into type inspection and factory inspection. The inspection items are as specified in Table 6. Table 6 Inspection items for dust collectors
Name of inspection items
Appearance quality inspection
Welding quality inspectionwww.bzxz.net
Processing and assembly quality inspection
Wear-resistant layer quality inspection
Dust removal efficiency
Pressure loss
Air leakage rate
7.2 Factory inspection
7.2.1 Factory inspection shall be carried out according to the items specified in Table 6. 7.2.2 Inspection according to other technical requirements specified in the order agreement Type inspection
7.2.3 Products leaving the factory must be inspected and qualified by the factory quality inspection department and accompanied by a product certificate. 7.3 Type inspection
7.3.1 Type inspection shall be carried out for dust collectors in any of the following situations: a) When a new product is finalized;
b) When the structure, manufacturing process and materials of the finalized product have changed significantly; c) When production is resumed after more than one year of suspension; d) When production is transferred to another factory;
e) When the technical supervision department makes a request.
Factory inspection
7.3.2 Sampling inspection shall be carried out according to the items specified in Table 6. The samples shall be drawn from the factory products or from the use site. Remarks
7.4 Principles for judging qualified products
JB/T9054-2000
If one of the main items or two of the other items are unqualified, it shall be judged as a defective product. 8 Warranty period
Within one year from the date of delivery, if the dust collector is damaged or cannot work normally due to manufacturing quality problems, the dust collector manufacturer shall be responsible for repairing or replacing parts for the user.
9 Marking, packaging, transportation and storage
9.1 Technical documents and nameplate
9.1.1 Technical Documents
Technical documents include: product certificate, product manual and installation drawing. The main contents of the product manual include: dust collector application scope: dust collector performance characteristics (processing gas volume-resistance dust removal efficiency change curve during cold test, engineering application measurement data, etc.), dust collector selection and performance calculation method, product installation instructions and schematics, maintenance and management methods.
9.1.2 Nameplate
The size and form of the product nameplate shall comply with the provisions of GB/T13306. The nameplate is installed in a position that is easy to observe and should include the following contents: manufacturer name, product model and number, product implementation standard number, rated processing gas volume (m/h), applicable temperature (℃), dust removal efficiency (%), resistance (Pa), weight (kg), manufacturing date. 9.2 Packaging, transportation and storage
9.2.1 Packaging
The packaging of the dust collector must be easy to lift regardless of the packaging form. For heavier parts and components, a lifting structure should be designed. The specific packaging structure is designed and determined by each manufacturer based on the principle of using local materials. The dust collector needs to wait for the paint to dry completely and pass the inspection before it can be packaged according to the packing list (delivery list). The packing list is packed with oil paper or plastic bags, fixed in a component, and marked with "packing list inside" on the component. The dust collector assembled and shipped out of the factory is generally packaged naked, which can be tightened with a tightening hoop to prevent the dust collector from rolling or moving. A sealing cover is installed on the upward loose opening to prevent rainwater or foreign objects from invading. The relative connection dimensions of each component or segment should be strictly checked before leaving the factory for bulk delivery of parts or segments. When the dust collector is transported over a long distance, necessary packaging should be made. The packaging must be strong enough to withstand multiple handling and loading and unloading to ensure safe and reliable delivery to the destination.
Railway transportation packaging should comply with the regulations of the People's Republic of China on railway freight transportation, truck full load reinforcement and overload cargo transportation rules. Road and water transportation shall comply with the regulations of the relevant departments. 9.2.2 Transportation
After the dust collector is packed, the following shipping marks should be made in obvious places: factory number, total number of pieces, shipping station (port), arrival station (port), shipping unit, consignee, factory or packing date, volume (length × width × height), gross weight and net weight (kg). 9.2.3 Storage
The dust collector should be stored in a rainproof, moisture-proof and well-ventilated place. Rainproof measures should be taken for short-term outdoor storage. 6
People's Republic of China
Mechanical Industry Standard
Centrifugal Dust Collector
JB/T9054-2000
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing
100044)
Word count 14,000
Format 880×12301/16 Printing sheet 3/4
First edition in August 2000 First printing in August 2000 Price 12.00 yuan
Print run 1-500
2000-076
Mechanical Industry Standard Service Network: 006
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.