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HJ 2526-2012

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HJ 2526-2012English399 Add to Cart Days<=3 Technical requirements for environmental protection products. Portable cooking fume detector Valid HJ 2526-2012
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Detail Information of HJ 2526-2012; HJ2526-2012
Description (Translated English): Technical requirements for environmental protection products. Portable cooking fume detector
Sector / Industry: Environmental Protection Industry Standard
Classification of Chinese Standard: N56
Classification of International Standard: 13.040.99
Word Count Estimation: 15,197
Quoted Standard: GB/T 191; GB 6388; GB/T 13306; GB/T 13384; GB/T 16157-1996; GB 18483-2001; HJ/T 212
Drafting Organization: China Environmental Protection Industry Association
Regulation (derived from): Department of Environmental Protection Notice No. 47 of 2012;
Summary: This standard provides a portable smoke detector diet (hereinafter referred to as the instrument) definition, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage and so on. This standard applies to the test

HJ 2526-2012
Technical requirements for environmental protection products.Portable cooking fume detector
People's Republic of China Environmental Protection Industry Standard
Environmental protection product technical requirements portable diet oil
Smoke detector
Technical requirements for environmental protection products
Portable cooking fume detector
Published on.2012-7-31
2012-11-1 Implementation
Ministry of Environmental Protection released
Preface II
1 Scope 1
2 Normative references 1
3 Terms and Definitions.1
4 Basic requirements 1
5 Performance requirements 3
6 Test method 3
7 Inspection rules 7
8 Marking, packaging, transportation and storage..8
Appendix A (informative appendix) standard soot generating device and its use method.9
In order to implement the "Environmental Protection Law of the People's Republic of China", strengthen the management of the emission of cooking fumes and regulate the detection of soot
Design and production of the instrument, the development of this standard.
This standard specifies the definition, technical requirements, inspection methods, inspection rules, signs, and portable smoking fume detectors.
Packaging, transportation, storage, etc.
This standard is the first release.
This standard was formulated by the Science and Technology Standards Department of the Ministry of Environmental Protection.
This standard is mainly drafted by. China Environmental Protection Industry Association, Beijing Zhonghua Science and Technology Co., Ltd., Qingdao Minghua
Electronic Instrument Co., Ltd.
This standard was approved by the Ministry of Environmental Protection on July 31,.2012.
This standard has been implemented since November 1,.2012.
This standard is explained by the Ministry of Environmental Protection.
Environmental protection product technical requirements portable diet oil smoke detector
1 Scope of application
This standard specifies the definition, technical requirements, test methods and inspections of portable food fume detectors (hereinafter referred to as instruments).
Rules, signs, packaging, transportation, storage, etc.
This standard is applicable to instruments that use the charge detection principle to test the concentration of dietary soot.
2 Normative references
The contents of this standard refer to the terms in the following documents. For undated references, the valid version applies to this standard.
GB/T 191 packaging and transportation icon logo
GB 6388 transport packaging receipt and delivery mark
GB/T 13306 signage
General technical conditions for GB/T 15464 instrumentation packaging
GB/T 16157-1996 Determination of particulate matter in fixed pollution source exhaust gas and sampling method of gaseous pollutants
GB 18483-2001 Cooking Industry Soot Emission Standard (Trial)
HJ/T 212 pollution source online automatic monitoring (monitoring) system data transmission standard
3 Terms and definitions
The following terms and definitions apply to this standard
3.1 Dietary fume
Refers to the oil, organic matter and its pyrolysis or cracking products that are volatilized during food cooking and processing.
3.2 Portable Fume Detector
Refers to the detection instrument that is easy to carry and can directly read the soot concentration data and related parameters on the spot. Sampling unit
And the data processing unit and other parts.
3.3 Principle of charge detection
The soot aerosol particles are charged by the high voltage electric field, and are pushed to the charge collection net under the action of the electric field force and the flowing air flow.
An electrical signal is generated in a circuit connected to the collection network, and the change of the signal is proportional to the concentration of the discharged soot, and the detection signal is
The soot concentration can be obtained by processing and conversion.
3.4 Standard status
Refers to the state when the temperature is 273K and the pressure is 101.325kPa.
4 basic requirements
4.1 Appearance
4.1.1 The structural parts such as the panel and the chassis of the instrument shall meet the requirements of the design documents. The surface of the product shall be free of obvious dents, scratches and cracks.
Seam, deformation and pollution, plating parts should be free of obvious scratches, shedding, rust and mechanical damage. The parts of this product should be fastened without looseness.
Keyboards, switches, buttons and connectors should be installed correctly, operate flexibly, reliably plugged, and accessible.
4.1.2 Under normal operating conditions, it can work smoothly for a long time without any factors affecting personal safety.
4.1.3 Each component is not prone to mechanical and electrical faults, and the entire device should be free from potential safety hazards.
4.1.4 The heat-bonding part of each component of the instrument shall not be deformed or changed due to heat.
4.1.5 Instruments and detachable parts should be easy to maintain and inspect.
4.2 Instrument construction and function
1. Charged area 2. Signal capture network 3. Sample tube 4. Pitot tube (S type) 5. Smoke temperature sensor 6. Signal output line 7. Moisture test tube
8. Flow meter front temperature sensor 9. Flow meter front pressure sensor 10. Flow sensor 11. Air pump 12. Single chip control system
13. Operation keys 14. Printer 15. Display 16. High voltage module
Figure 1 Schematic diagram of the detector
4.2.1 The instrument is mainly composed of three parts. sampling unit, detection unit and data processing unit.
4.2.2 Sampling unit
The sampling unit consists of a sampling tube, a heating unit, a connecting hose, a flow sensor, and a fan (pump) for collection.
Sample smoke to be tested. The heating unit should have sufficient heating power, and the heating temperature range should be controlled between 120 °C and 160 °C. sampling
The pipe material shall be made of materials resistant to high temperature, corrosion, non-absorption or chemical reaction with the pollutant to be tested, and may be at a certain temperature and
Maintain sufficient mechanical strength at the flow rate.
4.2.3 Detection unit
The detection unit is a sensing assembly that converts the soot concentration into an electrical signal, which is composed of a high voltage electrostatic generator, a charged tube, and a signal capture.
Net composition.
a) The high voltage module shall be capable of providing the high DC voltage required to fully charge the soot as it flows through the charging tube.
b) The charged tube shall be capable of charging the soot aerosol particles collected by the sampling unit.
c) The signal trapping net should enable the charged soot aerosol particles to release the charge and should be easy to install and easy to clean and replace.
4.2.4 Data Processing Unit
The data processing unit is composed of signal detection, amplification, analog-to-digital conversion, data processing and display, etc., and the detection unit can be
The obtained electrical signal is converted into soot concentration and can be correctly displayed on the display directly during the detection process, and automatically after the detection is completed.
Statistics and the average of the concentrations are shown.
4.2.5 The instrument shall have the function of storing and printing test data, and the storage capacity shall not be less than 30 sets of data.
4.2.6 The instrument shall have the function of communicating with the computer, and the interface type shall comply with the provisions of HJ/T 212.
4.2.7 The instrument time display should be unaffected by the continuity of the power supply and the time can be adjusted as needed.
5 performance requirements
5.1 Detection concentration range. (0 ~ 30.0) mg/m3.
5.2 Detection accuracy
5.2.1 Soot concentration ≤4.0 mg/m3. ≤±10%;
5.2.2 Soot concentration > 4.0 mg/m3. ≤ ± 5% FS.
5.3 Repeatability error of soot concentration. ≤±5%.
5.4 Instrument flow indication error. ≤ ± 5%.
5.5 Flow stability error. ≤ ± 5%.
5.6 1 hour zero drift of the instrument. ≤0.3 mg/m3.
5.7 Sample tube heating temperature range. 120 ° C ~ 160 ° C.
5.8 Sampling tube sealing. When the negative pressure in the sampling tube is (4~4.2) kPa, the pressure drop in the first minute is ≤120Pa.
5.9 When the sampling tube adopts the constant velocity sampling tube structure, the correction coefficient of the pitot tube (S type) is 0.84±0.01; the constant velocity tracking of the instrument
Response time. ≤ 20s.
5.10 Instrument pumping capacity. When the pumping flow rate is 60 L/min, the system negative pressure. ≤ -2kPa.
5.11 Pressure indication error
5.11.1 Pressure indication error before flowmeter. ≤±2.5%FS;
5.11.2 Dynamic pressure indication error. ≤ ± 2% FS;
5.11.3 Static pressure indication error. ≤ ± 4% FS;
5.12 Temperature indication error
5.12.1 Temperature indication error before flowmeter. ≤±2.5°C;
5.12.2 Flue gas temperature indication error. ≤ ± 3 ° C.
5.13 Oil smoke comparison test, the maximum relative error. ≤ 25%.
5.14 Insulation resistance of the instrument. ≥20MΩ.
5.15 Dielectric strength of the instrument. between the power phase and the casing (ground) under normal environmental conditions and when the analyzer is turned off.
Apply 50Hz, 1500V AC voltage for 1 minute, there should be no arcing and breakdown.
6 Test methods
6.1 Inspection conditions
6.1.1 Environmental conditions
a) Ambient temperature. -20 ° C ~ 40 ° C;
b) soot temperature. ≤120 ° C;
c) Relative humidity. ≤90%;
d) atmospheric pressure. (86 ~ 106) kPa;
e) Supply voltage. AC 220V/50Hz.
6.1.2 Standard instruments and equipment for inspection Electronic balance index value. 0.1mg. The maximum range of the electronic balance should be greater than the total weight of the soot generator. Electronic stopwatch division value. 0.01s. Tilting micromanometer. (0 ~ 2500) Pa, the division value. 2Pa. The second standard of glass thermometer, the division value. 0.1 °C. Semiconductor point thermometer, division value. 2 °C. Accumulated gas flow meter accuracy. ≥2.5, instantaneous flow. ≤120L/min, indexing value. 1L/min. Others. U-type differential pressure gauge, vacuum gauge, two-way valve, pressure generating device.
6.2 Visual inspection
6.2.1 Visual inspection of the appearance of the instrument, manual operation of switches, buttons and connectors shall comply with the requirements of 4.1.1;
6.2.2 The structure and function of the inspection shall be in accordance with the requirements of 4.2 in the performance inspection process.
6.3 Performance test
6.3.1 Measurement range, instrument accuracy test
Connect the soot generator, sampling tube and main unit according to the requirements of Appendix A, “The cooking fume generating device and its use method”.
it is good. With the soot generator that has been calibrated, the heating temperature is adjusted from the low to the high in the measuring range of the instrument by about 3
The three points of mg/m3, 15 mg/m3, and 30 mg/m3 uniformly produce soot. Start the instrument and check it after zero calibration. correspond
At each test point, the soot generator temporarily leaves the balance weighing platform and immediately calibrates the electronic balance to zero and puts the oil smoke on.
At the same time, record the weight of the soot generator G1, the initial reading of the gas flow meter V1, press the electronic stopwatch to time. Every 60 seconds
Record the readings of the instrument once, record a total of 10 times, and calculate the average value C. After 5 minutes, press the electronic stopwatch to stop timing.
Record the weight G2 of the soot generator and the reading V2 of the gas flow meter. Repeat the calculation of the average value three times for each point.
12 ×⎟⎠
⎛ −−
VVCδ (1)
Where. δ -- accuracy error;
C -- the average reading of the soot concentration instrument, mg/m3;
V2-V1 -- the volume of gas flowing through the sampling tube during the test, m3;
G1-G2 -- The amount of soot produced during the test, mg.
6.3.2 Repetitive error test of soot concentration
Select 6 consecutive data in the recorded data of 6.3.1 and calculate the repeatability error as follows.
i 0
)( 2
1 ×−
=θ (2)
Where. θ -- repeatability error;
IC -- the measured value of the ith time, mg/m3;
C -- average of 6 measurements, mg/m3;
n -- number of measurements.
6.3.3 Instrument flow indication error test
Connect the cumulative flow meter to the inlet of the instrument sampling tube with a rubber tube, start the instrument, and adjust the instrument flow to 80.
L/min, after the flow is stable, press the stopwatch and note the initial reading V0 of the cumulative flowmeter, record one every interval of 1min.
The indicated flow rate of the secondary instrument is qi, and the stop reading of the cumulative flowmeter is recorded while the timing is stopped after 10 minutes, and the flow is calculated as follows.
Measurement error.
0max ×−= Q
Qqiε (3)
Where. εmax -- maximum flow indication error;
Qi -- instrument indicating flow, L/min;
Q -- The instrument theoretically calculates the flow rate, ie Q = (V1-V0)/10, L/min.
6.3.4 Instrument flow stability error test
According to the test data of 6.3.3, select 6 instrumental value flow record values, and calculate the flow stability error according to the following formula.
Qqi 0
) ( 2 ×−
−=τ (4)
Where. τ -- flow stability error;
Qi -- instrument indicating flow, L/min;
q -- Average instrumentation flow rate, L/min.
6.3.5 Instrument zero drift test
Start the instrument, preheat for 10min, debug the soot to display the concentration value to zero, record the initial value 0p, record every 10min
Display the value, record a total of 7 times, calculate the maximum offset according to the formula.
0ppp id −= (5)
Where. dp -- maximum offset, mg/m3;
Ip -- the display value of the i-th time, mg/m3;
0p -- initial display value, mg/m3.
6.3.6 Instrument sampling tube heating temperature range test
Place the temperature probe of the semiconductor thermometer on the outer surface of the heating part of the sampling tube, wrap it with the insulation tape, and start
The instrument can automatically disconnect the heating power when the temperature rises to 160 ° C; when the temperature is lower than 120 ° C, it can automatically turn on the heating
power supply.
6.3.7 Instrument sample tube sealing test
The front end of the sampling tube is connected to the vacuum meter, and the outlet end is connected to the host through the valve, and the power of the main pump is turned on, and the value of the vacuum meter is indicated.
When reaching (4~4.2) kPa, close the valve quickly, press the electronic stopwatch at the same time, and read the vacuum to indicate the value within the first minute.
The falling value.
6.3.8 Instrument constant velocity tracking response time test
The two ends of the pitot tube are connected with a rubber tube and a tilting micro-pressure gauge, and the flow rate is adjusted to be 5 m/s; 10 m/s; 15 m/s; 20 m/s;
25m/s five checkpoints, using the stopwatch to record the actual sample flow shown on the display and the theoretical flow basis calculated from the flue gas flow rate
The time used when this is equal.
6.3.9 Instrument pumping capacity test
Start the instrument and adjust the dynamic pressure value of the pitot tube so that the flow rate of the instrument reaches 60 L/min.
Display value.
6.3.10 Instrument pressure indication error test Pressure indication error test before flowmeter
Uniformly select four measuring points including 0 points in the measurement range, and connect the three-way to the output of the pressure generator.
Terminate the standard pressure gauge and connect the other end to the vacuum pressure measurement port before the flowmeter. Adjust the output pressure to the verification point, and record the label separately
The quasi-pressure gauge and the instrument pressure indication value, each time the up-and-down stroke, calculate the pressure indication error by formula (6), with 8 calculation results
The value with the largest absolute value is used as the test result.
( ) 0×−=
Pp bs
Pδ (6)
Where. pδ - pressure indication error;
Sp -- the pressure test value of the instrument under test, kPa;
Bp -- standard pressure gauge test value, kPa;
p -- the full scale value of the pressure measuring device being tested, kPa. Dynamic pressure indication error test
Select 0, 100, 500, 900Pa four verification points, connect the tee to the output of the pressure generator, and connect one end to the standard pressure.
For the force gauge, the other end is connected to the dynamic pressure measuring port of the instrument, and the remaining steps are the same as Static pressure indication error test
Uniformly select five measuring points including 0 within the measuring range, and connect a tee at the output end of the pressure generator.
The standard pressure gauge is terminated, and the other end is connected to another tee. The remaining two ends of the tee are respectively connected to the pitot tube, and the remaining steps are the same.
Note. If the pressure measurement port before the flowmeter is inside the instrument and cannot be measured without turning on the whole machine, this data can be given by the sample supply unit.
6.3.11 Instrument temperature indication error test Temperature indication error test before flowmeter
Turn on the power of the instrument and place the standard thermometer and the temperature sensing element before the flowmeter at the same measuring point under the test environment.
Simultaneously measure and record two temperature measurement indication values, and calculate the indication error according to formula (7).
( ) 0×−=
Ttδ (7)
Where. tδ - temperature indication error, °C
St -- measured value of the instrument under test, °C
Bt -- standard thermometer measurement, °C
Note. When the temperature sensing element before the flowmeter is inside the instrument, the data can be given by the sample supply unit when the whole machine cannot be measured. Flue gas temperature indication error test
Connect the flue gas temperature measuring probe to the instrument and place it in the same position as the standard heat source.
The test is carried out at three temperature points of 60 ° C, 80 ° C and 120 ° C. After the indication is stable, the detected temperature value and the indication value of the standard thermometer are respectively recorded.
The indication error is calculated according to formula (7), and the value with the largest absolute value in the calculation result is used as the inspection result.
6.3.12 Oil smoke comparison test
The standard soot generating device is shown in Appendix A, and the six soot concentrations are measured by the measuring instrument and the national standard method (GB 18483-2001).
In the comparison experiment, the average value of the relative error of the soot concentration relative error is calculated. During the comparison experiment, the tester and the national standard method should be guaranteed.
Measure the consistency of the oil smoke.
6.3.13 Insulation resistance test
Under normal circumstances, turn off the meter and measure with a nationally specified impedance meter (DC 500V insulation impedance meter).
Insulation resistance between the case and the case.
6.3.14 Instrument dielectric strength test
Under normal environmental conditions and when the analyzer is turned off, 50 Hz, 1500 V is applied between the power supply phase and the chassis (ground).
The AC voltage lasts 1 minute. After the test is over, the instrument should work properly.
7 Inspection rules
7.1 Inspection classification
The inspection of the instrument is divided into factory inspection and type inspection.
7.2 Factory inspection
Before the instrument leaves the factory, it shall be inspected one by one according to the items specified in Table 1. If it fails, it shall be a non-conforming product.
7.3 Type inspection
7.3.1 Type inspection shall be carried out when one of the following conditions occurs.
a) new product type identification;
b) when there is a major change in the structure, materials or workmanship that may affect the main performance of the product;
c) in normal production, once every two years;
d) when production is suspended for more than two years;
e) When the factory inspection result is significantly different from the result of the last type inspection.
7.3.2 The type inspection shall be taken from the factory-qualified products, and the inspection items are shown in Table 1.
Table 1 Test items, technical requirements and test methods for diet fume detector
No. Item Name Technical Requirements Inspection Method Factory Inspection Type Inspection
1 Appearance 4.1 6.2 √ √
2 Construction and function 4.2 6.2 √ √
3 Detection concentration range 5.1 6.3.1 -- √
4 Detection accuracy 5.2 6.3.1 -- √
5 Repeatability error 5.3 6.3.2 -- √
6 Flow indication error 5.4 6.3.3 √ √
7 Flow stability error 5.5 6.3.4 √ √
8 1 hour zero drift 5.6 6.3.5 -- √
9 sampling tube heating temperature range 5.7 6.3.6 √ √
10 Sample tube tightness 5.8 6.3.7 √ √
11 Constant speed response time 5.9 6.3.8 √ √
12 Instrument pumping capacity 5.10 6.3.9 √ √
13 Pressure indication error 5.11 6.3.10 √ √
14 Temperature indication error 5.12 6.3.11 √ √
15 fume comparison experiment 5.13 6.3.12 -- √
16 Instrument insulation resistance 5.14 6.3.13 √ √
17 Instrument dielectric strength 5.15 6.3.14 -- √
7.4 Decision rules
7.4.1 If the product meets the requirements of the standard after inspection, it is judged as qualified.
7.4.2 If there are unqualified items in the sample, the sample shall be doubled and the unqualified items shall be re-examined.
The grid can still determine that the batch is qualified.
7.4.3 If there is still a re-examination item in the re-inspection product, it is judged that the batch of products is unqualified.
8 Marking, packaging, transportation and storage
8.1 mark
The instrument shall be provided with product signs in obvious parts, and the signs shall comply with the provisions of GB/T 13306.
8.2 Packaging
8.2.1 The packaging form shall comply with the provisions of GB/T 15464.
8.2.2 When the equipment is shipped from the factory, all joints, pipe ends and flange faces shall be protected.
8.2.3 Before packing, all the wearing parts such as instruments and meters should be protected against impact.
8.2.4 There should be a receipt and delivery mark and a storage and transportation mark outside the package, and it complies with the provisions of GB/T 191.
8.3 Transportation
The detector should be lightly loaded and unloaded, must not fall, avoid being crushed and collided, and pay attention to moisture, sun and fire.
8.4 Storage
The detector should be stored in a clean space to prevent dust, water and moisture, and to avoid crushing and collision.
Appendix A
(informative appendix)
Standard soot generating device and using method thereof
A 1 principle
A 1.1 A certain weight of edible oil is weighed 1g for the first time above the smoke temperature, and after a period of time t, the second time
When weigh 2g, the amount of soot generated in t time is δg = 1g - 2g.
A 1.2 If the fumes that occur are drawn into the detection tube (or the sampling tube with the collection filter cartridge) by a certain amount of gas, then the gas is in that time.
The theoretical formula for the soot concentration C of the body is.
C =
Gδ1000 (A.1)
Where. C -- the theoretical calculation of the concentration of soot, mg/m3;
Δg -- the amount of soot produced in a certain period of time, mg;
Q-- soot flow, L/min.
A 1.3 If the soot concentration value measured by the soot detector is sC, the relative error 1δ and relative standard between the detected value and the theoretical calculated value
The formula for calculating the deviation 2δ is.
01 ×−= C
CCsδ (A.2)
( )
n 0
2 ×−
−= ∑ =δ (A.3)
Where. 1δ - relative error of soot concentration;
2δ -- the relative standard error of soot concentration;
C -- the theoretical calculation of the concentration of soot, mg/m3;
Cs -- the concentration measured by the instrument (when the soot sampler is used, it is the smoke measured by infrared method after carbon tetrachloride extraction)
Degree), mg/m3;
Csi -- the ith test value at the same smoke temperature point (when the soot sampler is used, it is the carbon tetrachloride extract
Take the post-infrared method to measure the soot concentration value), mg/m3, i≥6;
n -- number of tests, n ≥ 6.
Calibration and use of A 2 soot generator
A 2.1 Preparation of standard oil
Pour the 500ml Erlenmeyer flask into edible peanut oil (or soy oil, rapeseed oil, blending oil, etc.) and place it on the electric stove.
A glass condenser tube with a conical opening and another flask placed below the other end of the condenser tube. Warm up to 120 ° C for 30 min, then heat up
The oil was refluxed at 300 ° C for 2 hours, and the volatile oil was obtained.
A 2.2 If it is difficult to prepare the standard oil according to the above method, the oil can be thermostated at.200 ° C for 30 min, after the oil temperature drops.
Remove the upper layer of oil for use.
Note. If the comparison test is carried out with the soot sampler, the standard oil should be divided into two parts and oiled separately under the same temperature, time and flow conditions.
Test of smoke detector and soot sampler.
A 2.3 The soot generating device can refer to HJ/T 62-2001 “Technical Requirements and Testing Technical Specifications for Cooking Fume Purification Equipment” 5.1.2
The prescribed method is as follows.
A 2.3.1 Determine the rate of soot generation
The preparation oil was evenly divided into three portions, and the rate of soot generation was determined according to the temperature and time specified in the table below. Pay attention to the temperature to be specified
Weighed and started to weigh.
Table A.1 Test record of fume incidence rate
Temperature °C
Sample number
(0~30)min (30~60)min
Smoke amount
Smoke amount
A 2.3.2 Connect the device according to Figure A.1. When the fume is stable, start the peristaltic pump and adjust to the appropriate number of revolutions.
Simulate the cooking environment by going to the heating block. Then take the oil cup out, quickly weigh it on the electronic balance and record the initial weight, then quickly
Return to the original position, start the instrument power, adjust the flow to 60 L/min or 80 L/min (if the comparison experiment, the two
The flow should be strictly consistent) and press the electronic stopwatch to time. When the determined experimental time is reached, press the stopwatch while stopping
Stop sampling and quickly weigh the final weight of the oil cup. Calculate the theoretical soot concentration C and smoke smoke according to the formulas (A.1), (A.2), and (A.3).
The relative error 1δ and the relative standard deviation 2δ of the measured value of the measuring instrument (or soot sampler).
1. Water cup 2. Adjustable speed peristaltic pump 3. Heating electric furnace 4. Heating block 5. Oil cup 6. Intake cone 7. Sampling test tube
8. Heating controller 9. Bracket 10. Instrument panel 11. Rubber tube
Figure A.1 Schematic diagram of the soot generating device
Related standard:   HJ 2527-2012  HJ 2528-2012
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