This standard specifies the model requirements and test methods for the simulation test of airflow distribution in electrostatic precipitators. JB/T 7671-1995 Simulation test method for airflow distribution in electrostatic precipitators JB/T7671-1995 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T7671-95
Electrostatic precipitator
Air flow distribution simulation test method
Issued on June 16, 1995bzxZ.net
Ministry of Machinery Industry of the People's Republic of China
Implementation on July 1, 1996
Mechanical Industry Standard of the People's Republic of China
Electrostatic precipitator
Air flow distribution simulation test method
1 Subject content and scope of application
This standard specifies the model requirements and test methods for the air flow distribution simulation test of electrostatic precipitator, JB/T7671-95
This standard is applicable to dry, plate and horizontal electrostatic precipitators, and is also applicable to the air flow distribution simulation test of other types of electrostatic precipitators. 2 Reference standards
GB/T13931 Performance test method of electrostatic precipitator JB5910
3 Model requirements
Technical conditions of electrostatic precipitator
3.1 According to the inlet flue and body size provided by the user, design the airflow distribution simulation test model. 3.2 The model design shall comply with the provisions of Article 5.1.3.1 of GB/T13931. For electrostatic precipitators with a nominal flow area greater than 200m2, the model ratio is allowed to be no less than 1:16. 3.3 The model must have sufficient strength and sealing, and a transparent viewing case seal is allowed to be set to observe the vortex, backflow and dead corner of the airflow. 3.4 Set a door or hole that can be opened and closed at the appropriate position of the model inlet head to facilitate disassembly and adjustment during the test. 4 Test method
4.1 Test instrument
Standard pitot tube, S-shaped pitot tube, ground anemometer or hot ball anemometer. The instrument should be calibrated regularly by the quality supervision and inspection department of measuring instruments.
4.2 Test section
It is set at the inlet end of the first electric field, that is, the front end of the simulated electrode. 4.3 Measurement point arrangement
In principle, the entire section is divided into small rectangles of equal area, and its midpoint is taken as the representative wind speed measurement point. The longitudinal and transverse measurement points are not less than 8x8.
4.4 Simulation test
4.4.1 The simulated fluid flow rate should meet the principle of dynamic similarity. According to the principle of self-modeling zone, the Reynolds number in the simulated electric field channel should be not less than 4000.
4.4.2 When a multi-head electrostatic precipitator is used and there is only one air intake source, the inlet flue needs to be tested for air flow distribution. The relative error between the sub-flows should not be greater than 10%. If it does not meet the requirements, a guide plate or damping plate can be set in the flue to adjust it. Approved by the Ministry of Machinery Industry on June 16, 1995
Implemented on July 1, 1996
JB/T7671-95
4.4.3 The direction of the airflow in the simulated electric field can be determined by silk thread, smoke, smoke belt or other qualitative techniques. It is required that the airflow in the electric field has no vortex, no backflow, no dead angle, and the flow direction is consistent with the axis of the electrostatic precipitator. 4.5 Evaluation basis
4.5.1 The test method of airflow distribution shall comply with the provisions of GB/T13931, 4.5.2 The relative root mean square deviation of the uniformity of airflow distribution shall comply with the provisions of Article 4.4 of JB5910. Additional remarks:
This standard is proposed and managed by the Electrostatic Precipitator Standardization Technical Committee of the Ministry of Machinery Industry. This standard is drafted by Shanghai Metallurgical Mining Machinery Factory and Zhuji Electrostatic Precipitator Research Institute. The main drafters of this standard are Yuan Hongrui, Xu Shouqing and Zhu Huafu.
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