GB/T 11653-2000 Technical performance and test methods of dust removal units
Some standard content:
National Standard of the People's Republic of China
GB/T 11653 2000
Technical performance and testing method of dust collecting unit
2000-09-26 Issued
Implementation on 2001-02-01
Issued by the State Administration of Quality and Technical Supervision
GH, T11653-2000
This standard is a revision of GB/T11653-18U Technical performance and testing method of dust collecting unit>. Compared with GB/T11653-1989, this standard has the following changes: The definitions of some terms have been changed.
Complete the technical specifications.
The calculation formula of the population of the hole group has been changed, the definition of the pressure has been determined, and the original purchase and calculation formula have been added. The method and calculation formula of using the air delivery instrument to measure the factory air have been added.
The unit has been rectified.
This standard replaces B/T 1162-1989 from the date of implementation. The appendix of this standard is the standard summary. This standard is proposed by the National Machinery Industry Association. This standard is issued by the National Machinery Industry Association. The originating units of this standard are: Dajin City Ventilator Factory, Harbin Hydrogen Production Industry Company, Shanghai Environmental Protection Equipment Factory. The main drafters of this standard are: Bai Xiuchun, Hao Shupan, Xie Lecheng, Huang Jianqi. 1. Standard of the People's Republic of China
Technical performance and test method of dust removal unit
Perforuaner of dust removal unitand measurement
This standard specifies the basic performance, test method and indicators that must be achieved for dust removal units. GA/T11653—200
Replacement G1/T11653—1889
User standard is applicable to dust removal units working in the operation bridge: This standard is used in the annual new production of dust removal units, sampling inspection of products before leaving the factory, assessment of product pressure during use and performance inspection by national quality authorities. This standard is not used for electrostatic mobile dust removal units: 2 Reference standards
The provisions contained in the following standards are referenced in this standard to constitute the provisions of this standard. When this standard is published, the versions shown are valid. All standards need to be revised, and all parties using this standard should explore the possibility of using the following standard versions as soon as possible. H/T123·201 Standardized air duct test for industrial ventilators GB/T5748—1985 Method for determination of dust potential in workplace air B/T12136993 Performance test method for towed dust collector GB16297—196 Comprehensive release standard for atmospheric pollutants GB/T16845.1—1997 Dust removal technology Part 1: Common terms GB/T16845.2-1997 Dust removal military terminology Part 1: Quick-acting, pass-through and transport dust collectors TJ35—1U7% Design hygiene standard for industrial enterprises 3 Definitions This standard adopts the following definitions 3.1 Standard refers to the state when the pressure is 273K and the pressure is 101.S2=ka. 3.2 Typical use: When the machine torque is appropriate to the designed wind volume and rated resistance, the fan is fully discharged from the supply network (only the daily period is consumed),
3.3 Rated resistance, the machine body resistance under normal working conditions reaches the designed air volume. 3.4 This place is a place where workers often or regularly stay during production. 3.5 Unit noise, the noise emitted by the unit body under certain conditions is measured. When the unit has no clean air duct, the dry air produced is included in the machine noise, and the sound pressure is used as the meter dB(A). 4 Unit technical performance
4.1 Emission concentration
) When the collected air from the operation is discharged to the operation site after purification, the emission concentration shall not exceed 1) 30% of the allowable duct specified in Chapter 2 of 36-199.
b) When discharged into the atmospheric circulation after purification by the unit, it shall comply with the provisions of 6B1529. National Quality and Technical Supervision 20000926 approved 2001-02-01 implementation
4.2 Service pressure
GB/T11653-20
Except for units without vertical dust hood and suction duct, the service pressure under the design (nominal) air volume shall not be less than 2J1P, 4.3 The wind speed
shall not exceed 3%.
4.4 Noise (Garbage)
Under normal working conditions, a single unit shall not exceed 75B (A) when working normally. High negative pressure dust removal units are generally 00)P and 3. The speed shall not exceed BCA:
4.5 The wind speed of the filter type dust removal machine should not exceed 2m/min5 Measurement and calculation items of the machine
) Atmospheric temperature, humidity and pressure!
h) Inlet and outlet gas temperature and temperature; ) Inlet and outlet gas static pressure, dynamic pressure, total pressure) Inlet and outlet pipe internal gas flow rate and flow rate monitoring: ) Dust content in gas in inlet and outlet pipes
f) Unit noise generation and environmental noise;
) Dust removal;
h) Wind speed:
) Strong force:
j) Unit (body) noise protection
6 Measurement requirements
61 The inlet and outlet of the unit shall be suitable for the internal gas static pressure, dynamic pressure, flow, dust content and other items. The same items shall be measured simultaneously. 6.2 The installation shown in Figure 1 shall be adopted.
6.3 The arrangement of dosage points shall comply with the provisions of Articles 6.1 and 5 of B/T12138--1983. 6 The inlet and outlet screens of the test device should be placed in a place that is not affected by other airflows. The air intake space is located at the center of the air intake duct section. No friction objects should be present within the range of 1.5 diameters. The distance between the outlet end and the center of the obstacle should be such that there is no external force risk to the extended path when the sieve device reaches the maximum speed.
6.5 The test duct should adopt a round cross-section. Its area should be as equal to the air intake surface of the test unit as possible. If it does not change, the pipe diameter should be changed as shown in Figure 2 to obtain high air. 6.6 Calculate the inlet windage using the inlet central flow meter (the output value in Figure 1). The collector should be made into the shape or color shown in Figure 3 and made according to the requirements of GB/T1236--20CU: a round collector is preferred.
6.7 The outer dimensions of the inlet.
6.8 The rectifier is installed with a rectifier mesh. The mesh spacing is 1C times the mesh diameter. The mesh structure is made according to the requirements of GB/T1236-2CU 25.2:
The two throttles are round (the end piece diameter should be less than one tenth of the wind diameter. The throttle flow is also determined by the company.
6.9 When measuring the unit in the field, the operating conditions should meet the design requirements and the section operation should be stable. The number of measuring points must meet the requirements of 3. The measuring surface should be selected as close to the machine as possible, and the distance between the upper and lower flanges should be greater than 3D. If the distance between the flanges cannot meet the requirements of 31), the number of measuring points should be increased accordingly. 6.10 Static pressure measuring station 5.
5.1! The structure of the special hole in the dust collection pipe is as follows: 6.2
GB/T11653
1 collector: 2 life plan: 3--correct joint: 4 fast flow metal mesh change standard before, - air inlet pipe test, 6-difference period; dust collector: 9 fast support 10 air outlet; 11-base: 12-atmospheric pressure gauge change diameter
Figure 1 prototype test device
Figure 2 variable belt
GH/T11653-200
National 3 collector group
Mourning flow pressure
1: test connection; 2-
Figure 5 static pressure lake structure
7 performance measurement and calculation
7. 1 Group degree measurement
GB/T 11653—2000
1—：2—short pipe: 5—measurement: 5—certificate 5 shade, 1, station structure
7.1.1 The surface temperature meter (thermometer) should have a graduation value of >0.5Y.7.1.2 The ambient temperature measurement unit
should measure the ambient temperature in the area before the air inlet, which is also the inlet temperature.7.1.3 The number of measurement points and the measurement should be in accordance with the provisions of 5.4, 6. and Figure-7, and the average value should be taken: 7. 2 Humidity measurement
The dry bulb method can be used to measure the humidity of the atmosphere. The effect of humidity on the change of the dry bulb dust collection unit can be calculated. The performance measurement of the dust collection unit should be carried out at a relative humidity of less than 30% in the air flow: 7.3 Principle of measurement
7.3.1 The atmospheric pressure should be higher than 1 kP.
.3.2. Use standard Pitot pressure gauge and 11-type pressure gauge to measure the static pressure of gas in pipeline, dynamic pressure. 7.4.1 Use flow collector to measure flow, according to formula (:): Q
Where: 2
Unit population flow, shift;
2 730E.: R-
(273 + t)
Fluid collector quantity, see riding indication A (standard attachment): Collector decomposition system effect, see benefit level A (standard attached record) Actual flow collector potential pressure value (absorbent light is negative value, PE: inlet gas humidity, C;
pressure k.
Entering unit standard flow according to formula:
Q: = 7 359 - e. - α. - F
Where: G
The crew can standardize the normal wind speed, m/.
7.4.2 Measurement of dynamic pressure flow in the pipeline
GB/T 11653--2000
7.4.2.1 Dynamic pressure balance adopts multi-point measurement, and the measurement point distribution should comply with the provisions of Figure 1 and 6.3.5.9. Each point needs to measure 3 points, and take the average value of the square of the dynamic pressure. When measuring the dynamic pressure, the gas flow should be checked. The deviation should not be greater than 5. The average value of the root of the dynamic pressure is calculated according to formula 3):
Where A
is the measured dynamic pressure, Pa:
7.4.2.2 Gas flow in the pipeline is calculated by formula [4]H: Y+++
(273+)
2730XF| |tt||E+0.01 force
Where: 4——gas flow/b
F——the appropriate cross-sectional area of the measuring disk,
the gas temperature at the measuring position, bzxZ.net
the static pressure at the measuring position, the suction end is a negative value, P:, the standard flow rate in the pipe is calculated according to the formula (),
Q=7350F
Formula: h
Standard frequency mi/h:
measurement disk surface temperature,
measurement cross-sectional static pressure, suction end is adjusted to a negative value, Ps, 7.4.3 Use wind speed position to measure flow.
e(B. + c.051p)
You can use thermal grade wind speed receiver or other digital wind speed receiver to distinguish the appropriate flow, and the selection of measuring points should meet the requirements of 1, 6.3 and 6.9. The flow rate is calculated according to formula (5):
Q - 3 600 V - F
Where:
gas flow volume, m/h;
V-average velocity, m/a:
product-load volume, m".
standard flow rate is calculated according to formula (7):
Where:
-standard state measurement, gh;
number =
pressure-gas static pressure at the measuring point, negative value for suction wax, Pa. 7.5 Measurement of inlet and outlet dust concentration
7.5. 1 Use a meter to determine the dust concentration at the inlet and outlet of the unit. The inlet dust concentration can also be measured by a dust plate, the dust generation time and air volume, and the inlet dust concentration. The outlet concentration can also be determined by using a calibrated rapid relative concentration meter. 7.5.2 The measurement point arrangement should comply with the provisions of Figure 1, 3.3 and 6.S. The sampling method outside the tube should be used. The sampling tube should be parallel to the air flow, and the distance between them should not exceed 5.
7.5.3 When testing the sample machine, use 225-day dry powder (median color d is 8~12um). For units with special purposes, the corresponding dust can be used. The dust reduction rate during the dust removal process is (4+1.5)s/s. The dust generation must be continuous in the sampling system. The dust is well dispersed and there is no dust deposition in the pipeline.
Preparation and removal of the membrane load shall be in accordance with B/T5748.
7.5.4 Dust concentration meter
CB/I 11653-2000
7.5.4.1 The method of weighing the dust emission and determining the occurrence time is connected to the formula (8) to calculate the inlet dust density 604
Where:
-inlet dust velocity + 9/m:
dust emission and interval tin
M-total amount of dust detected during the time: E: Q-inlet standard air volume m/.
7.5.4.2 The dust concentration of the gas during the measurement of the filter membrane (>) is determined by the formula (9): C--8
V,=V+K
K = 1. 585 ~ 273 - t.
in: -
dust content in the air (mg/m3);
before sampling (mg);
- falling film (mass after sample connection (mg); - sampling volume under standard conditions;
sampling rate; II:
K - single-digit adjustment coefficient
- sample flow rate (flow meter reading), 1./nin.. - sampling time, mia:
atmospheric outlet F at the rubber column location;
- indication method before flow, Pa;
temperature before flow meter,
1.6 inch pressure measurement calculation
7.5., under normal working conditions of the group, suitable By changing the wind area of the metal mesh after the collector, take the daily throttling adjustment to make the unit reach the designed value to determine the working pressure of the unit: when passing through the pool type machine, it is necessary to overcome the dust and latent ash, and continuously and evenly occur. When the static pressure value of the slurry flow meter is shown and the volume is the maximum air volume <before dust holding>%, clean it according to the cleaning method specified in the product, and record the static pressure value after adding ash. This is accompanied by five times of generation. Please ash, want to measure the dynamic position of the measuring plate before cleaning, static pressure reading
7.6.? In the dust removal system, the working pressure of the unit is equal to the mesh resistance before the unit, and the scene is measured at the specified position of 6.0. 7.5.3 The working pressure of the unit is calculated by batch method (1(0)~2: 7.6.3.1 Convenient method to support the flux:
=- 2i -
Use pressure, Pa:
Measure the static method of pulling, warm artificial, Pa:, a dynamic position of the measuring plate is suitable, Pa.
7.6.3.2 Make the static joint adjustment plate: #=-- * - 1.74 X
(2731t)(H10.001p)Q
(273—(E 0.0U1P
-( 113
or+:\
Benefit cross-sectional area, m:
Two measurements and temperature, C.
7.6.3.3 Use anemometer to measure:
CB/T11653—200C
Special P =- Pe - 1. + × 10-+ 5-+0.0010y.23 +
Gas flow rate in pipeline, kg/mt;
Gas flow rate in pipeline, m/s,
7.? The noise of the unit was measured. The unit was placed in a place without strong sound reflection except the ground. The unit was operated normally. The outlet of the air inlet duct should be treated with silencer. When the length of the air inlet duct is less than 6 meters, the inlet should be buried. The measuring point should be 11 meters away from the outer wall of the unit and 1.5 meters away from the ground. The average of four points should be taken. After the unit is turned off, the environmental noise should be measured in the original position. The average value is 7.? If the difference between the measured noise values of the scan is less than dB(A), take the arithmetic mean; otherwise, calculate the average value according to formula (13): fx = 10lp(m. + 1o, ko; + ) - 5.02 where:
average value
measured value at each point dB(A).
The ambient noise level is the same as above
7.7.3 The noise level of the unit (the actual noise) is calculated according to formula (14); L, = 10lg (1c.f, —100)
Where: E.
Unit (real noise of the unit), B(A): ambient back-end noise, DB(A):
7.8 Calculation of full wind rate
The leakage rate of the unit is calculated according to formula (15),
The gradual wind rate of the unit,
The standard wind speed of the unit, m/5;
The output state m
If the difference is not too big (less than 5), it can be calculated by formula (16—
Complete.9 Calculation of the dust removal rate of the unit
Calculation of the dust removal rate of the unit by formula 17
In the formula:
Dust removal rate·%
Dust content at the standard flow of the unit inlet is ng/m; Dust content at the standard flow of the unit is ng/m; Unit air flow rate, tt||-( 13 )
GB/T 11653—2000
Quick production test position
A1 blood neck bladder
A1.1 Determination of flow coefficient
or: e
|| Re ||tt| ... Fm/s
Kinematic viscosity coefficient
14.8314.90
15.6315.1c
15.5716,60:61616.2516.34 16.4316.2A1.2 Determination of pulse expansion coefficient
16.60 -15.6n15.70
:6.6:15.71
16.B116.91
17.0117.11
51-0551
Where...is the coefficient
actual atmospheric pressure, Pa.
A2 Only the determination of composite coefficient
E -o,- mluArne -2
In the formula Et
An combination system effect:
R-section required.
In equal diameter 0 yuan 0 for road three 0011076 three 0.98215, +n.... a. = 0. 54
In 0.5m straight wait 2 when m00063+0.0478+0.05533, r=0. 57- 5—1, 2U5 8n -. 15 33d3Enno
a. 313 1 + t. f62 3 — f. 315 7d:3G
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