JB/T 8537-1997 Laboratory test method for dust resistivity

JB/T 8537-1997 This standard is a revision of ZB J88 007-89 "Dust specific resistivity test method". This standard specifies the method for laboratory dust specific resistivity test. This standard is applicable to industrial dust specific resistivity determination. JB/T 8537-1997 Dust specific resistivity laboratory test method JB/T8537-1997 standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/F8537-1997
Laboratory Test Method for Dust Specific Resistivity
1.997-0-4 15 Issued
Ministry of Urban and Rural Industry of the People's Republic of China
1998-01-01 Implementation
B/I6537---1997
This standard is a revision of the BJ8-89 small specific resistance test method. The name of this standard is changed to facilitate the distinction between field test standards. This standard will take effect from 1 to 2 BJ88907-89. This standard was proposed by the Environmental Protection Machinery Standardization Technical Committee of the Ministry of Machinery Industry and the Electrical Engineering Division of the Institute of Electrical Engineering. This standard was drafted by: Jiangfei Electromechanical Research Institute Co., Ltd. This standard was drafted by: Feng Xiaohe, Zhou Goufei. This standard was issued in 1989.
! The standard is the laboratory test method of dust resistivity. This standard is used for the test of dust resistivity in industrial dust scanners. 2 Definitions 2.1 The test method of dust resistivity is the test method of the test method of dust resistivity in industrial dust scanners. 3.2 The test method of dust resistivity is the test method of the test method of dust resistivity in industrial dust scanners. 3.3 The test method of dust resistivity is the test method of the test method of dust resistivity in industrial dust scanners. 3.4 The test method of dust resistivity is the test method of the test method of dust resistivity in industrial dust scanners. 3.5 The test method of dust resistivity is the test method of the test method of dust resistivity in industrial dust scanners. 3.6 The test method of dust resistivity is the test method of the test method of dust resistivity in industrial dust scanners. 3.7 The test method of dust resistivity is the test method of the test method of dust resistivity in industrial dust scanners. 3.8 The test method of dust resistivity is the test method of the test method of dust resistivity in industrial dust scanners. 3.9 The test method of dust resistivity is the test method of the test method of dust resistivity in industrial dust scanners. 07-60
The dust produced by the machine under the heat is 1~204m in diameter, such as powder. 1.4 Non-volume density g/c1*
refers to the ratio of the dust particles formed by the natural volume in the dust pan to the volume of the dust pan. 2.5 Dust layer porosity .cmm
According to the ratio of the air volume of the middle layer to the air volume of the test pan 2.6 Burning beans .9
Dust properties are the determination of the combustion process of fuels. The air is dry and the proportion of raw materials is less than 75 2. The ratio of the weight of the new tip after ignition to the weight of the sample after drying. 3. Test equipment 3.1 The ratio value should be determined under the model product conditions. It needs to have temperature adjustment, temperature adjustment, and automatic control system. The test equipment is as shown in Figure 1. 3.2 Laboratory comparison electrode is determined according to the track 2: 3.3.1 Photographic equipment) Good conductivity:
Will not deform after heating
) Will not react chemically with some gases
) Environment and weather filtering:
) Good insulation: ") The pole is flat and smooth. High-voltage tip discharge is eliminated. Approved by the Ministry of Machinery Industry on 1997-14-15
Implemented on 1998-01-01
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JB/T85371997
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3.3.2 The agent tester is as specified in Table 1,
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3. 3.3 Test box
JB/T 8537.1997
n~2nkv
10---3X1D-\ A
16--4000
（6--1515
The test box has an adjustable range from room temperature to 400<The test temperature can be maintained within 0.017\B, and the self-convection cooling requirement is from 40 to s0
Note: T is the test temperature. Downward,
3.3.4 The output voltage of the direct current system is ~20 kV, the current is -10 mA, and the maximum output voltage fluctuation should be less than 0.2°C. 3.3.5 Humidity system
The steam supply of the evaporation system is monitored by the control of the electro-optical point meter in the test hoop, and the quantitative analysis method is used for calibration. The required humidity is set by adjusting the steam regulating valve and the electric positive receiving of the control water heater. Test steps
4. Preparation of samples
The samples should be gently crushed by brushless sieve and sieved by 1711. Remove foreign matter. Bottle and label. 4.2 Test preparation
When the sample is loaded into the half tray, the thickness of the sample is required to become 5m, the density of the powder layer is uniform, and the weight difference of the four dust trays filled with oxygen dust samples is not more than 10%, and the main tray containing the sample should not move when it is put into the test. The negative ion should be well connected. The dust trap on the center of the transformer layer cannot be overtaken by dust (5 times the dust is not filled in the soft hole between the upper and lower protection rings of the transformer. The protection ring is well grounded. The palm electrode is pressed on the ammeter and then connected to the ground. 4.3 Closed test of the electric step temperature and breakdown voltage
When the test voltage is in a two-digit relationship with the planned voltage, the temperature should be 15CC or 35C. This depends on the temperature of the electrostatic precipitator, and it should be done once a month. Or several tests with different impurities, when doing this test, the average speed of the electric field should be less than 2V/m. After that, the increase in the field is measured at 2kV/cm, and the dust layer is stopped. Note the specific electric field strength and the impact voltage at each point,
4.4 specific resistance test
specific electric field test starts from the normal mixing time, and the temperature sequence must be high. For coal, start the test from 90C, and the leakage between each measuring point 0, flow to 210C, special business to be able to measure 330 or 4CC.1 other samples should be based on the needs of the conditions,
the received voltage during the test must be 85%~95% of the main output voltage, but the added voltage cannot pass the power density medium more than 3%10: A/test about the activity must reach the expected state and stable (the temperature change within 10rn must be less than 0.01F), the change of the temperature must also be controlled within the required 5 must, wait for the temperature to After the temperature reaches the required state, it is stable for a month, and then the voltage is applied to the measured voltage point, which is stable for 30% and cannot exceed 1m, and the voltage and current values ​​are read. After burning, the specific electric value is calculated according to the formula: P-
In the formula,
This resistance·cm:
4—Upper electrode area, cm
-—Test voltage.hv;
Dust thickness.cm
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JR/T 8537-1997
The same method is used to measure 120, -6, 180.210C. After all the tests are completed, take out the dust plate and measure the quality of the material. If the structure layer is reduced by 0.5m, the actual thickness of the dust room is used to calculate the electric field strength and specific resistance. 5 Test report
) The relationship between specific resistance and temperature, humidity and electric resistance has been established. 4 small
Bin Education Commission
JB/8537-1997
TB/T6537-199
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