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HJ 1012-2018: Ambient air and stationary source emission - Specifications and test procedures for hydrocarbons, methane and nonmethane hydrocarbons portable total monitoring instrument
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Ambient air and stationary source emission - Specifications and test procedures for hydrocarbons, methane and nonmethane hydrocarbons portable total monitoring instrument
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HJ 1012-2018
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Basic data | Standard ID | HJ 1012-2018 (HJ1012-2018) | | Description (Translated English) | Ambient air and stationary source emission - Specifications and test procedures for hydrocarbons, methane and nonmethane hydrocarbons portable total monitoring instrument | | Sector / Industry | Environmental Protection Industry Standard | | Classification of Chinese Standard | Z15 | | Word Count Estimation | 20,247 | | Date of Issue | 2018-12-29 | | Date of Implementation | 2019-07-01 | | Regulation (derived from) | Ministry of Ecology and Environment Announcement No. 75 of 2018 | | Issuing agency(ies) | Ministry of Ecology and Environment | HJ 1012-2018: Ambient air and stationary source emission - Specifications and test procedures for hydrocarbons, methane and nonmethane hydrocarbons portable total monitoring instrument
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Ambient air and stationary source emission - Specifications and test procedures for hydrocarbons, methane and nonmethane hydrocarbons portable total monitoring instrument
National Environmental Protection Standard of the People's Republic
Ambient air and exhaust gas total hydrocarbons, methane and non-A
Technical requirements and detection of alkane total hydrocarbon portable monitor
method
Ambient air and stationary source emission-Specifications and test
Procedures for hydrocarbons, methane and nonmethane hydrocarbons
Portable total monitoring instrument
2 0 1 8 - 1 2 - 2 9 Release 2 0 1 9 - 0 7 - 0 1 Implementation
Department of Ecology and Environment
i directory
Foreword...ii
1 Scope...1
2 Normative references...1
3 Terms and Definitions...1
4 Structure of the instrument... 2
5 Technical requirements...3
6 Performance indicators...5
7 Detection method...7
8 Quality Assurance...12
9 Test items...13
Foreword
To protect the "Environmental Protection Law of the People's Republic of China" and the "Air Pollution Control Law of the People's Republic of China"
Environment, safeguarding human health, regulating the regulation of ambient air and fixed pollution sources, total hydrocarbons, methane and non-methane total hydrocarbons
The performance and quality of the tester shall be formulated in accordance with this standard.
This standard specifies the main technical requirements, testing items and testing of portable monitors for total hydrocarbons, methane and non-methane total hydrocarbons.
method.
This standard is the first release.
This standard is formulated by the Department of Eco-Environmental Monitoring, the Department of Regulations and Standards of the Ministry of Ecology and Environment.
This standard was drafted. China Environmental Monitoring Station.
This standard is approved by the Ministry of Ecology and Environment on December 29,.2018.
This standard has been implemented since July 1,.2019.
This standard is explained by the Ministry of Ecology and Environment.
1 Ambient air and exhaust gas total hydrocarbon, methane and non-methane total hydrocarbon portable monitor
Technical requirements and testing methods
1 Scope of application
This standard specifies the composition, technical requirements and performance indicators of portable monitors for total hydrocarbons, methane and non-methane total hydrocarbons.
And detection methods.
This standard applies to ambient air and fixed pollution source exhaust gas, methane and non-methane total hydrocarbon portable monitor (below
Design, production and testing of the "instrument" for short.
For the instruments used in different occasions, the detection range of the corresponding instrument is specified. For ambient air and ambient air pollution
Instrument for emergency monitoring of dyeing accidents This standard is called type I instrument. It is used to fix the instrument for monitoring the pollution of waste gas. This standard is called II.
Type instrument.
2 Normative references
This standard refers to the following documents or their terms. For undated references, the valid version applies to this
standard.
GB 3836.1 Explosive environment Part 1. General requirements for equipment
GB/T 4208 enclosure protection grade (IP code)
GB/T 16157 Determination of particulate matter in fixed pollution source exhaust gas and sampling method of gaseous pollutants
Determination of total hydrocarbons, methane and non-methane total hydrocarbons from stationary sources - Gas chromatographic method
HJ 168 Technical Guidelines for Standardization and Revision of Environmental Monitoring and Analysis Methods
HJ 604 Determination of total hydrocarbons, methane and non-methane total hydrocarbons - Direct injection - Gas chromatography
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Total hydrocarbons (THC)
Under the conditions specified by HJ 38 and HJ 604, the total amount of gaseous organic compounds in response to the hydrogen flame ionization detector
And (except unless otherwise stated, the results are in terms of carbon).
3.2
Nonmethane hydrocarbons (NMHC)
Under the conditions specified by HJ 38 and HJ 604, other gaseous states other than methane are responsive on the hydrogen flame ionization detector.
The sum of the organic compounds (the results are in terms of carbon unless otherwise stated).
23.3
Instrument detection limit
The instrument can qualitatively detect the minimum concentration of the substance to be tested from the sample within a given confidence level.
3.4
Quantitative measurement repeatability
Under a set of repetitive measurement conditions, based on the measurement precision of the indication value of the component to be tested, the instrument is continuously measured multiple times.
The same standard substance is expressed based on the relative standard deviation of the indication values of one or more of the components to be tested.
3.5
Response factor
In this standard, a hydrogen flame ionization detector measures the response of other gaseous organic compounds relative to the measured methane response.
The dimensionless ratio.
3.6
Parallel instrumentation parallelism
Under the same environmental conditions, the relative standard deviation of the measurement results of the same test object by two sets of the same type of system.
3.7
Conversion efficiency
The efficiency of oxidizing gaseous organic compounds other than methane using a catalytic oxidation unit.
4 structure of the instrument
4.1 Overall structural composition of the instrument
The instrument structure mainly includes sample collection and transmission unit, sample separation/pretreatment unit, analysis unit, and data acquisition.
And processing units, auxiliary equipment, etc. Depending on the measurement method and principle of the instrument, the instrument may have all or part of the above.
The structural composition, power supply and gas supply should ensure the needs of on-site monitoring work.
4.2 Sample Collection and Transfer Unit
It mainly includes sampling probe, sample transmission pipeline, flow control equipment and sampling pump. For the specific technical requirements, see 5.1.4.
And 5.2.4.1.
4.3 Sample separation/pretreatment unit
Mainly includes sample filter components and chromatographic separation components/high temperature catalytic components; sample separation/pretreatment component units
Materials and installations shall not affect instrument measurements. See 5.2.4.2 for specific technical requirements.
4.4 Analysis unit
It is used to measure and analyze the collected samples. For specific technical requirements, see 5.2.4.3.
34.5 Data Acquisition and Processing Unit
Used to collect, process, and store monitoring data, and to transmit monitoring data and device operating status according to central computer commands
Information; specific technical requirements for the data acquisition and processing unit are given in 5.2.4.5.
4.6 Auxiliary equipment
The portable instrument adopts the extraction measurement method, and its auxiliary equipment mainly includes exhaust gas discharge device, back-blowing purification and its control.
Equipment, condensate discharge equipment, explosion-proof equipment, etc.
5 Technical requirements
5.1 Type I Instrument Technical Requirements
5.1.1 General requirements
Same as 5.2.1.
5.1.2 Working conditions
Same as 5.2.2.
5.1.3 Security requirements
Same as 5.2.3.
5.1.4 Functional requirements
In addition to the sample collection and transmission unit heating, insulation and filtration functions, and the sampling pump to overcome the negative pressure function must not be required
In addition, the remaining requirements are the same as 5.2.4. The sample collection and transmission unit has a heating function, and the heating temperature is generally not lower than
120 ° C, and above the sampling pressure of the gas sample water dew point value or hydrocarbon dew point value (whichever is the maximum) 20 ° C or more,
The actual temperature value should be displayed in the instrument.
45.2 Type II instrument technical requirements
5.2.1 Appearance requirements
5.2.1.1 The instrument shall have a nameplate, and the nameplate shall be marked with the name, model number, production unit, factory number, date of manufacture, etc.
information.
5.2.1.2 The surface of the instrument should be intact, no obvious defects, each zero, the parts are connected reliably, and the operation keys and buttons are used.
Flexible and accurate positioning.
5.2.1.3 The instrument panel is clearly displayed, the color is firm, the characters and logos are easy to identify, and there are no defects affecting the reading.
5.2.1.4 The outer casing or cover of the instrument shall be corrosion-resistant, well sealed, dust-proof and rain-proof. The instrument shall at least reach GB/T 4208.
Medium IP55 protection level requirements. If the use environment has explosion-proof requirements, it must be implemented in accordance with the relevant provisions of GB 3836.1.
5.2.1.5 The instrument should have good portability and mobility, and the total instrument quality (including sampling and pretreatment equipment) should not exceed
30 kg.
5.2.2 Working conditions
a) Ambient temperature. (0 ~ 40) ° C;
b) Relative humidity. ≤ 85%;
c) Atmospheric pressure. (80 ~ 106) kPa;
d) Supply voltage. AC (220 ± 22) V, (50 ± 1) Hz. A DC 24 V power supply is available.
Note. Under special environmental conditions, the configuration of the equipment should meet the requirements of local environmental conditions.
5.2.3 Security requirements
5.2.3.1 Insulation resistance
Insulation of the power terminal of the instrument to the ground or the cabinet under the condition of ambient temperature (15~35) °C and relative humidity ≤ 85%
The resistance is not less than 20 MΩ.
5.2.3.2 Insulation strength
At an ambient temperature of (15 ~ 35) ° C, relative humidity ≤ 85%, the instrument is at 1500 V (RMS), 50 Hz
Under the sine wave test voltage for 1 min, there should be no breakdown or arcing.
The instrument shall have a leakage protection device with good grounding measures to prevent damage to the system caused by lightning strikes.
5.2.4 Functional requirements
5.2.4.1 Sample collection and transmission unit requirements
5.2.4.1.1 The sample collection component must have heating, heat preservation and filtration functions, and the heating temperature is generally not lower than 120 °C.
And above the flue gas temperature of 20 ° C or more, the actual temperature value should be able to display in the instrument. Sample collection components should also have particles
Object filtering function. The front or rear end of the sampling device should have a particulate filter that is easy to replace or clean, and the filter material
The material should not adsorb and react with gaseous contaminants. The filter should be able to filter at least 5 μm particle size. Pick
The 5 sample pump should have sufficient pumping capacity to overcome the negative pressure of the flue. The instrument should ensure accurate and reliable sampling flow.
5.2.4.1.2 The material of the sample collection component shall be selected to withstand high temperature, corrosion and non-adsorption, and not against gaseous pollutants.
The materials should not affect the normal measurement of the pollutants to be tested.
5.2.4.1.3 The sample transfer line should be of moderate length. Stable, uniform heating and insulation should be used when using heat tracing lines
Function; its heating temperature is generally not lower than 120 ° C, and higher than the flue gas temperature of 20 ° C or more, the actual temperature value should be able to be in the instrument
Shown in .
5.2.4.1.4 Sample collection and transmission components shall have functional requirements for complete system calibration.
5.2.4.1.5 Sample transfer lines shall use materials that do not adsorb and do not react with gaseous contaminants.
5.2.4.2 Sample separation/pretreatment unit requirements
5.2.4.2.1 Equipment and its components should be easily cleaned and replaced.
5.2.4.2.2 If the dehumidification function is set, it shall be ensured that the dehumidification process of the sample will not cause loss of gaseous pollutants.
5.2.4.2.3 The material of the pretreatment equipment shall be a material that does not adsorb and does not react with gaseous pollutants.
5.2.4.2.4 To prevent particle contamination of the analyzer, a fine filter should be provided before the gas sample enters the analyzer;
The material of the filter material should not adsorb and react with gaseous pollutants. The filter should be able to filter at least (0.5~1)μm.
Particulate matter of particle size.
5.2.4.3 Analytical instrument requirements
5.2.4.3.1 Analytical instruments and their associated devices shall have automatic recording and storage of data files, query of historical data, and re-entry
The function of printing and printing.
5.2.4.3.2 Analytical instruments using a hydrogen flame ionization detector shall have real-time automatic detection of the current flame state, or weekly
The function of automatically detecting the flame state.
5.2.4.3.3 Analytical instruments using a hydrogen flame ionization detector shall have a flame detected by an automatic flame detection function
After the fault condition is extinguished, the function of automatic/manual ignition and the instrument resumes normal operation.
5.2.4.4 Calibration function requirements
5.2.4.4.1 With manual and/or automatic mode calibration.
5.2.4.4.2 With external calibration method.
5.2.4.5 Data Acquisition and Processing Unit Requirements
5.2.4.5.1 The instrument shall be capable of displaying, storing and outputting monitoring data and reports.
5.2.4.5.2 Data values that are at least 10% below their zero point and above the range should be displayed and recorded.
5.2.4.5.3 It has the function of displaying and setting the system time and time label, and the data is the average value of the setting period.
65.2.4.5.4 It has the function of displaying real-time data and querying historical data, and can output in the form of reports or reports.
5.2.4.5.5 It has digital signal output function and data wired/wireless network transmission function.
5.2.4.5.6 Software with Chinese data collection, recording, processing and control.
6 Performance indicators
6.1 Type I instrument performance indicators
6.1.1 Method performance indicators
6.1.1.1 Instrument detection limit
Instrument detection limit. ≤ 0.13 μmol/mol (0.07 mg/m3, in terms of carbon).
6.1.1.2 Sample blank
The sample blank should be less than the instrument detection limit.
6.1.1.3 Quantitative measurement repeatability
Relative standard deviation. ≤ 2.0% (methane).
6.1.1.4 Linearity error
Linearity error. no more than ±2.0% of full scale (methane).
6.1.1.5 spike recovery rate
The spike recovery should be between 80% and 120%.
6.1.2 Instrument performance indicators
6.1.2.1 Instrument analysis cycle
Instrument analysis period. ≤ 2 min.
6.1.2.2 Impact of changes in ambient temperature
The ambient temperature varies from (0 to 40) °C, and the change of the measured value of all measured components of the instrument. no more than ±5.0% full
Range.
6.1.2.3 Effect of supply voltage variation
The supply voltage varies by ±10%, and the change of the measured value of all measured components of the instrument. no more than ±2.0% of full scale.
6.1.2.4 Effect of oxygen
The effect of oxygen on non-methane total hydrocarbon measurements does not exceed ±5.0% of full scale.
76.1.2.5 Response factor
The mass response factor of each VOCs component relative to methane should meet a certain range, as shown in Table 1.
Table 1 Scope of response factors for each component
Sequence number response factor range
1 Propane 0.9～1.2
2 aliphatic hydrocarbons 0.8 to 1.2
3 aromatic hydrocarbons 0.8 to 1.2
4 dichloromethane 0.75~1.15
6.1.2.6 Parallelism between instruments
Two sets of instruments measure the relative standard deviation of the same standard sample value ≤ 5.0%.
6.1.2.7 Conversion efficiency
An instrument that catalyzes the oxidation of non-methane total hydrocarbons using catalytic oxidation techniques should have a conversion efficiency of ≥95%.
6.2 Type II instrument performance indicators
6.2.1 Method performance indicators
6.2.1.1 Instrument detection limit
Instrument detection limit. ≤ 1.49 μmol/mol (0.8 mg/m3, in terms of carbon).
6.2.1.2 Sample blank
The sample blank should be less than the instrument detection limit.
6.2.1.3 Quantitative measurement repeatability
Relative standard deviation. ≤ 2.0% (methane).
6.2.1.4 Linearity error
Linearity error. no more than ±2.0% of full scale (methane).
6.2.1.5 Standardized recovery rate
The spike recovery should be between 80% and 120%.
6.2.2 Instrument performance indicators
6.2.2.1 Instrument analysis cycle
Instrument analysis period. ≤ 2 min.
86.2.2.2 Effect of changes in ambient temperature
The ambient temperature varies from (0 to 40) °C, and the change of the measured value of all measured components of the instrument. no more than ±5.0% full
Range.
6.2.2.3 Effect of injection flow changes
The injection flow rate changes by ±10%, and the change of the measured value of all measured components of the instrument. no more than ±2.0% of full scale.
6.2.2.4 Effect of supply voltage variation
The supply voltage varies by ±10%, and the change of the measured value of all measured components of the instrument. no more than ±2.0% of full scale.
6.2.2.5 Effect of vibration
After the vibration test according to the specified vibration conditions and frequency, the change of the indication values of all measured components of the instrument. no more than
±2.0% of full scale.
6.2.2.6 Effect of oxygen
Effect of oxygen on the measurement of non-methane total hydrocarbons. no more than ±5.0% of full scale.
6.2.2.7 Response factor
The relative mass response factor of each VOCs component should meet a certain range, as shown in Table 1.
6.2.2.8 Parallelism between instruments
Two sets of instruments measure the relative standard deviation of the same standard sample. ≤5.0%.
6.2.2.9 Conversion efficiency
The equipment for oxidizing non-methane total hydrocarbons using catalytic oxidation technology should have a conversion efficiency of ≥95%.
7 Detection methods
7.1 General requirements
7.1.1 At least 2 sets of instruments of the same type shall be taken for simultaneous testing at the designated site.
7.1.2 Unplanned maintenance, overhaul and adjustment of the instrument are not permitted except during calibration.
7.1.3 If the test is interrupted due to the power supply problem, after the power supply returns to normal, continue the test and the completed test
Test indicators and data are valid.
7.1.4 If the test is interrupted due to instrument failure, after the instrument returns to normal, the test is restarted and the test has been completed.
Test indicators and data are invalidated; during the test, the number of failures per instrument (set) is ≤2 times.
7.1.5 The test data of each technical indicator is the final result stored by the instrument data acquisition and processing unit.
7.1.6 The instrument detection range of type I instruments is not more than 20 mg/m3 (non-methane total hydrocarbons, in terms of carbon), type II instruments
The detection range is no more than.200 mg/m3 (non-methane total hydrocarbons, in terms of carbon).
97.2 Standard substance requirements
7.2.1 Standard gas. Commercially available certified standard gas, uncertainty ≤ 2.0%.
7.2.2 Nitrogen can be used for zero gas, wherein the hydrocarbon should not be higher than 0.3 mg/m3; the range calibration gas should be methane standard gas.
Body, a lower concentration of standard gas can be obtained by dilution with a high concentration of standard gas.
7.3 Type I and Type II instrument detection methods
7.3.1 Instrument detection limit
The instrument is turned on and the operation method is called up, so that the instrument is in an optimal operating state, and zero gas or hydrocarbon removal near the detection limit is introduced.
The gas spiked sample is continuously measured 7 times after the reading is stable, and the measured concentration value X is recorded.
Where i is the number of measurements (i = 1, 2..., n),
Calculate the standard deviation S of the acquired data according to formula (1)
To S
Recorded as the zero noise of the instrument.
( )
n 2
XX
∑ (1)
Where. S
-- zero noise, μmol/mol (mg/m3);
-- concentration measured at the i-th injection, μmol/mol (mg/m3);
-- The average concentration of the n injections, μmol/mol (mg/m3);
i -- the serial number of the recorded data (i = 1 ~ 7);
n -- The total number of recorded data (n=7).
Calculate the instrument detection limit R of the instrument to be tested according to formula (2)
DL
. The instrument detection limits of Type I and Type II instruments should be separated
Requirements of 6.1.1.1, 6.2.1.1.
03.143DLR S= (2)
Where. R
DL
-- the minimum detection limit of the analytical instrument to be tested, μmol/mol (mg/m3);
-- Zero noise value of the analytical instrument to be tested, μmol/mol (mg/m3);
3.143 -- 7 consecutive injections, t values in the 99% confidence interval.
7.3.2 Sample blank
After the instrument is running to the optimum state, zero or no hydrocarbon air is introduced, and the result of the blank measurement is measured, and the measurement is repeated three times.
The maximum value of the sample blanks of Type I and Type II instruments shall comply with the requirements of 6.1.1.2 and 6.2.1.2, respectively.
7.3.3 Quantitative measurement repeatability
After the instrument to be tested is stable, pass the concentration (50%±5%) of the calibration gas (methane), and wait for the reading to stabilize.
Recorded display value C
Repeat the above test operation at least 6 times using the same concentration calibration gas, and calculate the instrument to be tested according to formula (3).
Quantitative measurement repeatability. The quantitative measurement repeatability of Type I and Type II instruments shall comply with the requirements of 6.1.1.3 and 6.2.1.3, respectively.
( )
×=
CC
(3)
Where. S
-- Quantitative measurement repeatability of the instrument to be tested, %;
- the i-th measurement of the range gas, μmol/mol (mg/m3);
C--the average value of the range gas measurement, μmol/mol (mg/m3);
I--the serial number of the recorded data (i=1~n);
n--Number of measurements (n ≥ 6).
7.3.4 Linearity error
After the instrument to be tested is stable and calibrated, the concentration is (20%±5%) full scale, (40%±5%)
Range, (60% ± 5%) full scale and (80% ± 5%) full scale standard gas (methane); recorded separately after recording
The instrument indicates the value of all measured components of each standard gas, and then enters zero gas to wait for the instrument to return to zero.
Repeat the above steps 3 times, calculate the measurement error of all measurement components of each concentration standard gas of the instrument to be tested according to formula (4).
Percentage of full scale L
Ei
, type I, type II instruments L
Ei
The maximum values shall comply with the requirements of 6.1.1.4 and 6.2.1.4, respectively.
( )
0×
CC
Sidi
Ei
(4)
Where. L
Ei
-- The linear error of the i-th concentration standard gas measured by the analytical instrument to be tested, %;
Si
-- the nominal value of the i-th concentration standard gas concentration, μmol/mol (mg/m3);
-- The analytical instrument to be tested measures the average value of the third measurement of the i-th concentration standard gas, μmol/mol (mg/m3);
i--Measure the standard gas number (i = 1 ~ 4);
R--the full scale value of the instrument to be tested, μmol/mol (mg/m3).
7.3.5 Standard recovery rate
Collect three actual samples, add a certain amount of methane and propane standard materials, add the scalar amount and the midpoint of the standard curve.
The concentration is matched. Calculate the spiked recovery rate of the sample and calculate the addition of the type I and II instruments in section A.4.2 of HJ 168.
The yield should meet the requirements of 6.1.1.5 and 6.2.1.5, respectively.
7.3.6 Instrument analysis cycle
The instrument analysis period refers to the time interval between two sets of adjacent measurement results when the instrument is continuously running. Type I and Type II instruments
The instrumental analysis cycle shall comply with the requirements of 6.1.2.1 and 6.2.2.1, respectively.
7.3.7 Impact of changes in am...
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