Some standard content:
ICS23.160
Machinery Industry Standard of the People's Republic of China
JB/T10278-2001
FashDryers
Published on 2001-06-04
China Machinery Industry Federation
Implemented on 2001-10-01
JB/T10278—2001
The product model of this standard is compiled in accordance with the provisions of JB/T6924-1998 "Drying Equipment Product Model Compilation Method". Appendix A and Appendix B of this standard are the appendices of the standard. This standard is proposed and managed by the Mechanical Industry Drying Equipment Standardization Technical Committee. The drafting unit of this standard: Chengdu Wangjiang Dryer Factory, Sichuan Province. The main drafters of this standard: Chen Jingwen, Long Haiyun, Huang Guiyuan, Chen Yunshan. This standard is published for the first time.
1 Scope
Machinery Industry Standard of the People's Republic of China
Flash Dryers
FlashDryers
JB/T10278—2001
This standard specifies the types and basic parameters, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage requirements of flash dryers.
This standard applies to straight tube, cyclone and pulse tube flash dryers (hereinafter referred to as dryers). Other types of flash dryers can also be implemented as a reference.
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 valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB191—2000
GB/T 6388—1986
GB/T 37681996Www.bzxZ.net
GB/T133061991
JB/T16211993
SJ/T106741995
3 Terms
This standard adopts the following definitions.
Packaging storage and transportation pictorial signs
Transport packaging delivery and receipt signs
Acoustics, sound pressure method for measuring the sound power level of noise sources, simple method for measuring the surface on the reflecting surface using the envelope measurement sign
Industrial boiler smoke box steel bacon
General technical conditions for coating
Technical conditions
Unit heat consumption (symbol: g): The heat consumed by the dryer when dehydrating 1kg during drying operation, in kJ/kg. 4 Structural type and basic parameters
4.1 The dryer is mainly composed of a feeder (screw feeder), a drying tube and a separation device. 4.2 Product model
4.2.1 Representation method
Approved by China Machinery Industry Federation on June 4, 2001, implemented on October 1, 2001
4.2.2 Model example
JB/T10278—2001
Main parameter. Expressed by dehydration capacity, kg/h
Auxiliary characteristic (structural type) code. The straight tube type is represented by the first letter of the Chinese Pinyin "Z", the cyclone type is represented by the first letter of the Chinese Pinyin "×", and the pulse tube type is represented by the first letter of the Chinese Pinyin "M"
Main characteristic code. The professional code is represented by the first letter of the Chinese Pinyin Q of the word "气" in "气气". The first letter G of the Chinese pinyin of the word "干" in "干" indicates that GQZ-500 indicates a straight tube airflow dryer with a dehydration capacity of 500kg/h per hour. Basic parameters
The basic parameters of the straight tube dryer shall comply with the provisions of Table 1. 4.3.1
Table 1 Basic parameters
GQZ-100
GQZ-250
GQZ-500
GQZ-750
GQZ-1000
GQZ-1500
GQZ-2000
Dehydration capacity
Unit heat consumption
≤6700
Pulse tube type, cyclone type and other types of airflow dryers shall refer to the basic parameters of the corresponding specifications in Table 1 for implementation. 5 Requirements
5.1 The dryer shall comply with the requirements of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 5.2 Requirements for working environment conditions:
a) The working environment temperature shall not be higher than 40℃ and not lower than 4℃; b) The relative humidity shall not be higher than 90%.
5.3 Manufacturing quality requirements
5.3.1 The materials used for the main components of the dryer shall comply with the design requirements. 5.3.2 The welding quality shall comply with the requirements of the drawings. The welds shall not have defects such as cracks, slag inclusions, pores, weld nodules, arc pits, etc. 5.3.3 The roughness Ra of the inner wall surface (including welds) of the airflow duct in contact with the material shall be less than 12.5um 5.3.4 The manufacturing quality of the dust exhaust hood of the dryer shall comply with the provisions of JB/T1621. 5.3.5 The supporting equipment of the dryer, the purchased (co-purchased) parts (blower, induced draft fan, flue gas induced draft fan, motor, cyclone separator, bag filter, etc.) shall comply with their respective product standards and have a certificate of conformity. 2
JB/T10278—2001
5.3.6 The electrical control equipment, electrical appliances and installation quality of the dryer must comply with the national electrical appliances and installation technical standards. 5.4 Appearance quality requirements
5.4.1 The appearance quality of the dryer coating shall comply with the appearance quality requirements of Class II coating in 1.3.1 of SJ/T10674-1995. 5.4.2 The outer surface of the drying pipe shall be flat and not deformed, and the connection of each section of the air pipe shall be firm and airtight. According to user requirements, a device for laying an insulation layer can be added on the outer surface of the drying pipe.
5.4.3 Temperature and pressure monitoring devices shall be left on the pipeline. 5.4.4 Each transmission part should be equipped with a protective safety device. Parts that rotate in one direction should also be marked with the direction of movement. 5.5 No-load performance requirements
5.5.1 After the screw feeder runs idle for 2 hours, the temperature rise of the bearing and reducer should not exceed 20°C. 5.5.2 The fan, feeder and discharger should run smoothly without abnormal phenomena, and the damper should be flexible and reliable. 5.5.3 Check each frame, there should be no obvious deformation and large vibration, and the pipe connections should not be loose or leaking. 5.6 Load performance requirements
5.6.1 When the drying performance test is carried out according to Appendix A, the dehydration volume should comply with the provisions of Table 1. 5.6.2 When the drying performance test is carried out according to Appendix B, the unit heat consumption should comply with the provisions in Table 1. 5.6.3 The dryer should be able to meet the requirements of drying other materials within the scope of use. 5.6.4 The working noise of the dryer should comply with the provisions of Table 1. 5.7 Reliability requirements
Under the maintenance, upkeep and correct operation rules of the dryer, the reliable working time of the dryer host should be no less than 10,000 hours. 6 Test methods
6.1 According to Appendix A, the dehydration capacity of the dryer shall be tested and measured, and the results shall comply with the provisions of Table 1. 6.2 According to Appendix B, the unit heat consumption of the dryer shall be measured, and the results shall comply with the provisions of Table 1. 6.3 The noise of the dryer shall be measured with a sound level meter, that is, the noise values of no less than 4 points around the feed inlet of the airflow drying pipe 1m away and 1.5m above the ground shall be averaged. The background noise shall be processed according to the requirements of 8.2 of GB/T3768-1996. 6.4 The dryer shall be able to meet the drying of other materials within the applicable scope. According to the process conditions and requirements for material drying operations in actual production, on-site operation shall be carried out to verify the degree to which the dryer meets the user's requirements for the drying of the material (which can be evaluated according to the technical agreement or contract). 6.5 The reliability test of the dryer can be carried out at the test point established by the user's factory. Keep good work records and submit reports, which should meet the requirements of 5.7.
7 Inspection rules
7.1 The dryer must be inspected and qualified by the manufacturer's product quality inspection department and accompanied by a product quality certificate before it can leave the factory. 7.2 The inspection of the dryer is divided into factory inspection and type inspection. 7.2.1 Factory inspection
7.2.1.1 Each dryer must undergo factory inspection. Each dryer should undergo a no-load running test of no less than 2 hours and be inspected in accordance with the requirements of 5.4 and 5.5.
7.2.1.2 When the dryer is assembled on site, the factory inspection items are carried out at the installation and commissioning production site, and the on-site commissioning report can be used as the basis for inspection acceptance or delivery.
7.2.2 Type inspection
JB/T10278—2001
7.2.2.1 Type inspection shall be carried out when any of the following conditions are met: a) When the product is trial-produced or transferred to another factory for production; b) When the product is produced again after being discontinued for two years;
c) Every two years during normal production;
d) When there are major changes in product structure, materials, or processes; e) When the national quality supervision agency proposes a requirement for type inspection. 7.2.2.2 In addition to all the contents of the factory inspection, the type inspection shall also be carried out in accordance with the requirements of 5.6. 7.2.2.3 For the type inspection, one sample shall be randomly sampled from the products that have passed the factory inspection, or the sample and materials may be inspected at the production site after negotiation.
7.2.2.4 Judgment rules
If there is any unqualified item in the items to be inspected for the type inspection, double sampling shall be carried out for re-inspection of the item. If the re-inspection still fails, the product shall be judged as unqualified.
8 Marking, packaging, transportation, storage
8.1 Marking
8.1.1 Product marking
Each product shall be fixed with a product label in a conspicuous place. Its type, size and technical requirements shall comply with the provisions of GBT13306. Its contents shall include:
a) Product name:
b) Manufacturer's name and address;
c) Trademark:
d) Product model:
e) Manufacturing date:
Product factory number;
g) Product main parameters.
8.2 Packaging
8.2.1 Packaging marking
There shall be markings such as shipping and receiving, packaging and storage on the outer surface of the product packaging material. The packaging marking shall comply with the provisions of GB/T6388 and GB191.
8.2.2 Packaging
The dryer is unpackaged. According to the special requirements of the user, it can be packed by parts. The product parts should be fixed reliably in the box and have rainproof facilities.
8.2.3 The accompanying documents of the product should include:
a) Product certificate:
b) Product instruction manual (including product installation diagram and foundation diagram):c) Packing list (random spare parts list).
8.3 Transportation
JB/T10278—2001
Dryers and packaging must not be damaged during transportation. There should be a canopy or other rainproof measures during transportation. 8.4 Storage
1 The storage warehouse should be flat, ventilated and dry. 8.4.1
2 When stored outdoors, there should be a canopy or other rainproof measures. 8.4.2
If the storage time exceeds 18 months, maintenance should be carried out once. 5
Test instruments
JB/T10278—2001
Appendix A
(Appendix of the standard)
Determination method of dehydration amount of air flow dryer
A1.1 The moisture content of the material is determined by the weight loss method, and the oven (or infrared moisture meter) is used for determination, and the baking temperature is not higher than 105℃. The baking temperature error of the oven is not more than 1℃. A1.2
A1.3 The inlet and outlet hot air temperatures are measured by a digital thermometer with an error (including sensor) not more than 0.5℃. A1.4 The ambient temperature is measured by an experimental mercury thermometer with an error not more than 0.5℃. A1.5 The ambient humidity is measured by a hygrometer.
A1.6 The gas flow rate is measured by an anemometer. Before the experiment, the instruments and meters used should be inspected and calibrated to ensure the accuracy requirements. A17
Test conditions
Edible corn flour with a moisture content of ≤40%45% (wet basis) and a particle size of 0.1~0.5mm was selected. The working conditions of A22 dryer shall meet the following requirements: a) Inlet hot air temperature: 130℃±5℃
b) Outlet hot air temperature: 70℃±5℃; c) Gas flow rate in drying tube: 25~30m/sd) Moisture content of finished materials (wet basis): ≤10% A3 Test steps
After the dryer reaches the working conditions specified in A22, start feeding, take samples of finished materials at the outlet of the dryer, and measure the moisture content. When the moisture content reaches the specified value, start timing and collect the amount of finished materials at the outlet of the dryer at the same time. It should continue to work for 2h (uninterruptedly), weigh the finished materials collected within 2h, take samples of finished materials every 30min during the continuous monitoring period, and measure the moisture content. After the end, use the arithmetic average method to calculate the average moisture content of the finished materials using the moisture content measured four times. A4 Calculation of evaporation moisture
The evaporation moisture is calculated according to formula (A1):
W——evaporation moisture, kg/h;G,—finished product material quantity, kg/h:
Material moisture content before drying (wet basis), %:W
(1-w2)t
w2——finished product material moisture content after drying (wet basis), %;Test measurement time, h.
(AI)
JB/T10278—2001
Appendix B
(Standard Appendix)
Measurement method of unit heat consumption of airflow dryer
The unit heat consumption of airflow dryer can be measured simultaneously with the dehydration measurement, and the fuel consumption used during the test can be measured. The low calorific value of the fuel (coal, oil, gas) used in the test should be tested before the test. Calculation of unit heat consumption
-Unit heat consumption, kJ/kg(HO)
Where: q——
B——fuel consumption during the test, kg; Q%——low calorific value of fuel, kJ/kg; AW. —Total dehydration during the test, kg. Note: The above units are applicable to coal fuel.
...........................................(B)
Republic
Mechanical Industry Standard
Airflow Dryer
JB/T10278-2001
Published and issued by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Format 880×1230
1/16 Printing Sheet 3/4
4 Word Count 16.000
First Edition in September 2001
First Printing in September 2001
Print Quantity 1-500
Price 1200 Yuan
2001-095
Mechanical Industry Standard Service Network: http/wwwJB.ac.cn1084 The ambient temperature is measured with an experimental mercury thermometer with an error of no more than ±0.5℃. A1.5 The ambient humidity is measured with a hygrometer.
A1.6 The gas velocity is measured with an anemometer. Before the experiment, the instruments and meters used should be inspected and calibrated to ensure the accuracy requirements. A17
Test conditions
Edible corn flour with a moisture content of ≤40%45% (wet basis) and a particle size of 0.1~0.5mm is selected. The working conditions of A22 dryer shall meet the following requirements: a) Inlet hot air temperature: 130℃±5℃
b) Outlet hot air temperature: 70℃±5℃; c) Gas flow rate in drying tube: 25~30m/sd) Moisture content of finished materials (wet basis): ≤10% A3 Test steps
After the dryer reaches the working conditions specified in A22, start feeding, take samples of finished materials at the outlet of the dryer, and measure the moisture content. When the moisture content reaches the specified value, start timing and collect the amount of finished materials at the outlet of the dryer at the same time. It should continue to work for 2h (uninterruptedly), weigh the finished materials collected within 2h, take samples of finished materials every 30min during the continuous monitoring period, and measure the moisture content. After the end, use the arithmetic average method to calculate the average moisture content of the finished materials using the moisture content measured four times. A4 Calculation of evaporation moisture
The evaporation moisture is calculated according to formula (A1):
W——evaporation moisture, kg/h;G,—finished product material quantity, kg/h:
Material moisture content before drying (wet basis), %:W
(1-w2)t
w2——finished product material moisture content after drying (wet basis), %;Test measurement time, h.
(AI)
JB/T10278—2001
Appendix B
(Standard Appendix)
Measurement method of unit heat consumption of airflow dryer
The unit heat consumption of airflow dryer can be measured simultaneously with the dehydration measurement, and the fuel consumption used during the test can be measured. The low calorific value of the fuel (coal, oil, gas) used in the test should be tested before the test. Calculation of unit heat consumption
-Unit heat consumption, kJ/kg(HO)
Where: q——
B——fuel consumption during the test, kg; Q%——low calorific value of fuel, kJ/kg; AW. —Total dehydration during the test, kg. Note: The above units are applicable to coal fuel.
...........................................(B)
Republic
Mechanical Industry Standard
Airflow Dryer
JB/T10278-2001
Published and issued by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Format 880×1230
1/16 Printing Sheet 3/4
4 Word Count 16.000
First Edition in September 2001
First Printing in September 2001
Print Quantity 1-500
Price 1200 Yuan
2001-095
Mechanical Industry Standard Service Network: http/wwwJB.ac.cn1084 The ambient temperature is measured with an experimental mercury thermometer with an error of no more than ±0.5℃. A1.5 The ambient humidity is measured with a hygrometer.
A1.6 The gas velocity is measured with an anemometer. Before the experiment, the instruments and meters used should be inspected and calibrated to ensure the accuracy requirements. A17
Test conditions
Edible corn flour with a moisture content of ≤40%45% (wet basis) and a particle size of 0.1~0.5mm is selected. The working conditions of A22 dryer shall meet the following requirements: a) Inlet hot air temperature: 130℃±5℃
b) Outlet hot air temperature: 70℃±5℃; c) Gas flow rate in drying tube: 25~30m/sd) Moisture content of finished materials (wet basis): ≤10% A3 Test steps
After the dryer reaches the working conditions specified in A22, start feeding, take samples of finished materials at the outlet of the dryer, and measure the moisture content. When the moisture content reaches the specified value, start timing and collect the amount of finished materials at the outlet of the dryer at the same time. It should continue to work for 2h (uninterruptedly), weigh the finished materials collected within 2h, take samples of finished materials every 30min during the continuous monitoring period, and measure the moisture content. After the end, use the arithmetic average method to calculate the average moisture content of the finished materials using the moisture content measured four times. A4 Calculation of evaporation moisture
The evaporation moisture is calculated according to formula (A1):
W——evaporation moisture, kg/h;G,—finished product material quantity, kg/h:
Material moisture content before drying (wet basis), %:W
(1-w2)t
w2——finished product material moisture content after drying (wet basis), %;Test measurement time, h.
(AI)
JB/T10278—2001
Appendix B
(Standard Appendix)
Measurement method of unit heat consumption of airflow dryer
The unit heat consumption of airflow dryer can be measured simultaneously with the dehydration measurement, and the fuel consumption used during the test can be measured. The low calorific value of the fuel (coal, oil, gas) used in the test should be tested before the test. Calculation of unit heat consumption
-Unit heat consumption, kJ/kg(HO)
Where: q——
B——fuel consumption during the test, kg; Q%——low calorific value of fuel, kJ/kg; AW. —Total dehydration during the test, kg. Note: The above units are applicable to coal fuel.
...........................................(B)
Republic
Mechanical Industry Standard
Airflow Dryer
JB/T10278-2001
Published and issued by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Format 880×1230
1/16 Printing Sheet 3/4
4 Word Count 16.000
First Edition in September 2001
First Printing in September 2001
Print Quantity 1-500
Price 1200 Yuan
2001-095
Mechanical Industry Standard Service Network: http/wwwJB.ac.cn108
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