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HJ
ENVIRONMENTAL PROTECTION STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
Specifications and test procedures for nonmethane
hydrocarbons continuous emission monitoring
system in stationary sources
Issued on. DECEMBER 29, 2018
Implemented on. JULY 01, 2019
Issued by. Ministry of Ecological Environment
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 System composition and structure... 5
5 Technical requirements... 7
6 Performance indicators... 11
7 Testing method... 13
8 Quality assurance... 27
9 Testing items... 30
Appendix A (Normative) NMHC-CEMS daily report, monthly report, annual
report... 33
Appendix B (Informative) Original record of laboratory testing and on-site
testing... 38
Appendix C (Normative) Calculation of conversion of volume concentration to
mass concentration in carbon... 47
Foreword
This standard is hereby formulated, to implement the "Environmental Protection
Law of the People's Republic of China" and "The Air Pollution Prevention Law
of the People's Republic of China", protect the ecological environment and
human health, regulate the performance and quality of the nonmethane
hydrocarbons continuous emission monitoring system in stationary sources,
implement monitoring for the emission pollutants from the stationary
atmospheric pollution source.
This standard specifies the main technical requirements, test items, test
methods for the nonmethane hydrocarbons continuous emission monitoring
system in stationary sources.
Appendices A and C of this standard are normative appendixes. Appendix B is
an informative appendix.
This standard is issued for the first time.
This standard was formulated by the Department of Ecological Environment
Monitoring, the Department of Regulations and Standards of the Ministry of
Ecological Environment.
Drafting organization of this standard. China Environmental Monitoring Station.
This standard was approved by the Ministry of Ecological Environment, on
December 29, 2018.
This standard will be implemented on July 1, 2019.
This standard is interpreted by the Ministry of Ecological Environment.
Specifications and test procedures for nonmethane
hydrocarbons continuous emission monitoring
system in stationary sources
1 Scope
This standard specifies the composition structure, technical requirements,
performance indicators, detection methods of nonmethane hydrocarbons
continuous emission monitoring system in stationary sources.
This standard applies to the design, production, testing of nonmethane
hydrocarbons continuous emission monitoring system in stationary sources.
2 Normative references
This standard refers to the following documents or their clauses. For undated
reference documents, their valid versions are applicable to this standard.
GB 3836.1 Explosive atmospheres - Part 1.Equipment - General
requirements
GB/T 4208 Degrees of protection provided by enclosure (IP code)
GB/T 16157 The determination of particulates and sampling methods of
gaseous pollutants emitted from exhaust gas of stationary source
HJ 38 Stationary source emission - Determination of total hydrocarbons,
methane and nonmethane hydrocarbons - Gas chromatography
HJ 75 Specifications for continuous emissions monitoring of SO2, NOX, and
particulate matter in the flue gas emitted from stationary sources
HJ 76 Specifications and test procedures for continuous emission monitoring
system for SO2, NOX and particulate matter in flue gas emitted from
stationary
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Nonmethane hydrocarbons (NMHC)
Under the conditions specified in the HJ 38 standard, the sum of other
gaseous organic compounds than methane, which respond on the hydrogen
flame ionization detector, as calculated in carbon, unless otherwise specified.
3.2
Nonmethane hydrocarbons continuous emission monitoring system
(NMHC-CEMS)
All equipment, which is required to continuously monitor the emission
concentration and volume of non-methane hydrocarbons in exhaust gas
from stationary sources, as referred to as NMHC-CEMS.
3.3
Analysis cycle time
The time interval, between the two sets of measurement results, which is
given when the system is running continuously.
4 System composition and structure
4.1 System composition
The stationary pollution source NMHC-CEMS consists of a non-methane
hydrocarbon monitoring unit, a waste gas parameter monitoring unit, a data
collection and processing unit, as shown in Figure 1.The system measures the
concentration of non-methane hydrocarbons in the exhaust gas AND the
exhaust gas parameters (temperature, pressure, flow rate or flow, humidity,
etc.).
4.2 System structure
The NMHC-CEMS's system structure mainly includes sample collection and
transmission devices, pretreatment equipment, analysis instruments, data
collection and transmission equipment, other auxiliary equipment, etc.
Depending on the measurement method and principle of the system, the
system may consist of all or part of the above structure.
4.2.3 Analytical instruments
The analytical instrument is used to measure and analyze the collected waste
gas samples from the pollution source. For specific technical requirements, see
5.4.3.
4.2.4 Data collection and transmission equipment
Data collection and transmission equipment is used to collect, process, store
monitoring data. It can transmit monitoring data and equipment working status
information, according to the commands from central computer. See 5.4.4 for
specific technical requirements.
5 Technical requirements
5.1 Appearance requirements
5.2 Working conditions
NMHC-CEMS shall work normally under the following conditions.
5.3.2 Insulation strength
When the ambient temperature is (15 ~ 35) °C and the relative humidity is ≤
85%, the system shall last for 1 min, under 1500 V (effective value), 50 Hz sine
wave test voltage; there shall be no breakdown or arcing.
5.3.3 The system shall have a leakage protection device and good grounding
measures, to prevent damage to the system, which is caused by lightning
strikes.
5.4 Functional requirements
5.4.1 Requirements for sample collection and transmission devices
5.4.1.1 The sample collection and transmission device shall select the materials,
which are resistant to high temperature, corrosion, non-absorptive, non-reactive
with the pollutants under test; meanwhile, it shall not affect the normal
measurement of the pollutants under test.
5.4.1.6 The sampling pump shall have sufficient suction capacity, to overcome
the negative pressure of the flue; ensure that the sampling flow is accurate,
reliable, and relatively stable.
5.4.2 Pretreatment equipment
5.4.2.1 The pretreatment equipment and its components shall be easy to clean
and replace. It shall be made of materials, which do not absorb and do not react
with the pollutants under test.
5.4.2.2 In order to prevent particles from polluting the analyzer, a fine filter can
be set, before the gas sample enters the analyzer. The fine filter shall be able
to filter particles, which have a particle size of (0.5 ~ 2) μm at least.
5.4.3 Requirements of analytical instrument
5.4.4.4 It has a digital signal output function.
5.4.4.5 It has Chinese data collection, recording, processing and control
software. For data collection, recording, processing requirements, see
Appendix B in HJ 76.
5.4.6 Requirements of calibration function
5.4.6.1 The system shall be able to be calibrated manually and/or automatically.
5.4.6.2 For the system, which adopts the extraction measurement method, it
shall have a fixed and easy-to-operate calibration gas full-system calibration
function.
6 Performance indicators
6.1 Laboratory testing
6.1.1 Analysis cycle
System analysis cycle. ≤ 2 min.
6.1.5 24h drift
24 h zero drift and span drift. Not more than ± 3% of full scale.
6.1.6 The influence of environmental temperature changes
When the ambient temperature changes within the span of (15 ~ 35) °C, the
change of non-methane hydrocarbon's indication value. Not more than ±5% of
full scale.
6.1.10 Response factor
When the system measures non-methane hydrocarbons, the relative mass
response factors of other VOCs, as relative to propane, must meet a certain
span of requirements, as shown in Table 1.
6.2 On-site detection of pollutant discharge
6.2.1 Analysis cycle
System analysis cycle. ≤ 3 min.
6.2.2 24h drift
24 h zero drift and span drift. Not more than ± 3% of full scale.
6.2.3 Accuracy
When using the reference method to make measurement, the average
concentration of the non-methane hydrocarbon is.
6.2.4 Performance indicators of exhaust gas parameters
The performance indicator requirements of exhaust gas parameters (oxygen,
flow rate, flue gas temperature, humidity) shall meet the relevant requirements
of HJ 76.
7 Testing method
7.1 Laboratory testing requirements and methods
7.1.1 General requirements
7.1.1.1 Take at least 3 sets of systems of the same model for simultaneous
testing, at the designated laboratory site.
7.1.1.5 If the test is interrupted due to a system failure, restart the test after the
system returns to normal; the completed test indicators and data will be invalid.
During the test period, the number of system failures per unit (set) is ≤ 2.
7.1.1.6 For systems with automatic calibration function, it may set any cycle;
the system will perform automatic calibration; during the testing, the automatic
calibration cycle shall be set to ≥ 24 h.
7.1.2 Standard material requirements
7.1.2.1 Calibration gas. Commercially available certified calibration gas, which
has an uncertainty of ≤ 2.0%.
7.1.3 Laboratory testing methods
7.1.3.1 Analysis cycle
The analysis cycle time refers to the time interval, between the two sets of
measurement results, which are given, during continuous operation of NMHC-
CEMS. There are 3 measurements in 3 consecutive days. The daily analysis
cycle time shall meet the requirements of Table 3.
7.1.3.3 Repeatability
After the system under test is running stably, lead in the span calibration gas.
Record the measured value, after the displayed value is stable. Repeat the
above operation, at least 6 times, by the use of the span calibration gas of the
same concentration. Calculate the repeatability (relative standard deviation) of
the system under test, according to formula (2). The results shall meet the
requirements of Table 3.
7.2.2 On-site testing methods
7.2.2.1 Analysis cycle
The on-site testing method of the analysis cycle time is consistent with the
laboratory testing method, as shown in 7.1.3.1.The results shall meet the
requirements of Table 4.
7.2.2.2 24h drift
The detection methods of on-site 24h zero drift and span drift are consistent
with the laboratory detection methods, as shown in 7.1.3.5.The results shall
meet the requirements of Table 4.
7.2.2.4 Exhaust gas parameters
Refer to HJ 76, for the detection method of exhaust gas parameters (oxygen,
flow rate, smoke temperature, humidity).
8 Quality assurance
8.1 Installation quality assurance
8.1.1 The installation location and on-site supporting environmental conditions
shall meet the requirements of the HJ 75 standard.
8.2 Testing quality assurance
8.2.1 The on-site testing shall be carried out, under the condition that the
stationary pollution source discharges pollutants normally. During the initial
inspection and re-inspection, a dedicated person must be responsible for
supervising the working conditions AND maintain it relatively stable during the
test.
8.2.4 For complete extraction and dilution extraction systems, when performing
zero and span calibration, in principle, the zero gas and calibration gas must
pass through the same path as the sample gas (such as sample collection
device, transmission pipeline, pretreatment, etc.).
8.3 Daily operation quality assurance
8.3.1 Regular calibration
9 Testing items
For the stationary pollution source waste gas NMHC-CEMS, the laboratory
testing and on-site testing items are as shown in Table 3 and Table 4.The on-
site testing items of exhaust gas parameters are as shown in Table 5.See
Appendix B, for the relevant record form.
HJ
ENVIRONMENTAL PROTECTION STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
Specifications and test procedures for nonmethane
hydrocarbons continuous emission monitoring
system in stationary sources
Issued on. DECEMBER 29, 2018
Implemented on. JULY 01, 2019
Issued by. Ministry of Ecological Environment
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 System composition and structure... 5
5 Technical requirements... 7
6 Performance indicators... 11
7 Testing method... 13
8 Quality assurance... 27
9 Testing items... 30
Appendix A (Normative) NMHC-CEMS daily report, monthly report, annual
report... 33
Appendix B (Informative) Original record of laboratory testing and on-site
testing... 38
Appendix C (Normative) Calculation of conversion of volume concentration to
mass concentration in carbon... 47
Foreword
This standard is hereby formulated, to implement the "Environmental Protection
Law of the People's Republic of China" and "The Air Pollution Prevention Law
of the People's Republic of China", protect the ecological environment and
human health, regulate the performance and quality of the nonmethane
hydrocarbons continuous emission monitoring system in stationary sources,
implement monitoring for the emission pollutants from the stationary
atmospheric pollution source.
This standard specifies the main technical requirements, test items, test
methods for the nonmethane hydrocarbons continuous emission monitoring
system in stationary sources.
Appendices A and C of this standard are normative appendixes. Appendix B is
an informative appendix.
This standard is issued for the first time.
This standard was formulated by the Department of Ecological Environment
Monitoring, the Department of Regulations and Standards of the Ministry of
Ecological Environment.
Drafting organization of this standard. China Environmental Monitoring Station.
This standard was approved by the Ministry of Ecological Environment, on
December 29, 2018.
This standard will be implemented on July 1, 2019.
This standard is interpreted by the Ministry of Ecological Environment.
Specifications and test procedures for nonmethane
hydrocarbons continuous emission monitoring
system in stationary sources
1 Scope
This standard specifies the composition structure, technical requirements,
performance indicators, detection methods of nonmethane hydrocarbons
continuous emission monitoring system in stationary sources.
This standard applies to the design, production, testing of nonmethane
hydrocarbons continuous emission monitoring system in stationary sources.
2 Normative references
This standard refers to the following documents or their clauses. For undated
reference documents, their valid versions are applicable to this standard.
GB 3836.1 Explosive atmospheres - Part 1.Equipment - General
requirements
GB/T 4208 Degrees of protection provided by enclosure (IP code)
GB/T 16157 The determination of particulates and sampling methods of
gaseous pollutants emitted from exhaust gas of stationary source
HJ 38 Stationary source emission - Determination of total hydrocarbons,
methane and nonmethane hydrocarbons - Gas chromatography
HJ 75 Specifications for continuous emissions monitoring of SO2, NOX, and
particulate matter in the flue gas emitted from stationary sources
HJ 76 Specifications and test procedures for continuous emission monitoring
system for SO2, NOX and particulate matter in flue gas emitted from
stationary
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Nonmethane hydrocarbons (NMHC)
Under the conditions specified in the HJ 38 standard, the sum of other
gaseous organic compounds than methane, which respond on the hydrogen
flame ionization detector, as calculated in carbon, unless otherwise specified.
3.2
Nonmethane hydrocarbons continuous emission monitoring system
(NMHC-CEMS)
All equipment, which is required to continuously monitor the emission
concentration and volume of non-methane hydrocarbons in exhaust gas
from stationary sources, as referred to as NMHC-CEMS.
3.3
Analysis cycle time
The time interval, between the two sets of measurement results, which is
given when the system is running continuously.
4 System composition and structure
4.1 System composition
The stationary pollution source NMHC-CEMS consists of a non-methane
hydrocarbon monitoring unit, a waste gas parameter monitoring unit, a data
collection and processing unit, as shown in Figure 1.The system measures the
concentration of non-methane hydrocarbons in the exhaust gas AND the
exhaust gas parameters (temperature, pressure, flow rate or flow, humidity,
etc.).
4.2 System structure
The NMHC-CEMS's system structure mainly includes sample collection and
transmission devices, pretreatment equipment, analysis instruments, data
collection and transmission equipment, other auxiliary equipment, etc.
Depending on the measurement method and principle of the system, the
system may consist of all or part of the above structure.
4.2.3 Analytical instruments
The analytical instrument is used to measure and analyze the collected waste
gas samples from the pollution source. For specific technical requirements, see
5.4.3.
4.2.4 Data collection and transmission equipment
Data collection and transmission equipment is used to collect, process, store
monitoring data. It can transmit monitoring data and equipment working status
information, according to the commands from central computer. See 5.4.4 for
specific technical requirements.
5 Technical requirements
5.1 Appearance requirements
5.2 Working conditions
NMHC-CEMS shall work normally under the following conditions.
5.3.2 Insulation strength
When the ambient temperature is (15 ~ 35) °C and the relative humidity is ≤
85%, the system shall last for 1 min, under 1500 V (effective value), 50 Hz sine
wave test voltage; there shall be no breakdown or arcing.
5.3.3 The system shall have a leakage protection device and good grounding
measures, to prevent damage to the system, which is caused by lightning
strikes.
5.4 Functional requirements
5.4.1 Requirements for sample collection and transmission devices
5.4.1.1 The sample collection and transmission device shall select the materials,
which are resistant to high temperature, corrosion, non-absorptive, non-reactive
with the pollutants under test; meanwhile, it shall not affect the normal
measurement of the pollutants under test.
5.4.1.6 The sampling pump shall have sufficient suction capacity, to overcome
the negative pressure of the flue; ensure that the sampling flow is accurate,
reliable, and relatively stable.
5.4.2 Pretreatment equipment
5.4.2.1 The pretreatment equipment and its components shall be easy to clean
and replace. It shall be made of materials, which do not absorb and do not react
with the pollutants under test.
5.4.2.2 In order to prevent particles from polluting the analyzer, a fine filter can
be set, before the gas sample enters the analyzer. The fine filter shall be able
to filter particles, which have a particle size of (0.5 ~ 2) μm at least.
5.4.3 Requirements of analytical instrument
5.4.4.4 It has a digital signal output function.
5.4.4.5 It has Chinese data collection, recording, processing and control
software. For data collection, recording, processing requirements, see
Appendix B in HJ 76.
5.4.6 Requirements of calibration function
5.4.6.1 The system shall be able to be calibrated manually and/or automatically.
5.4.6.2 For the system, which adopts the extraction measurement method, it
shall have a fixed and easy-to-operate calibration gas full-system calibration
function.
6 Performance indicators
6.1 Laboratory testing
6.1.1 Analysis cycle
System analysis cycle. ≤ 2 min.
6.1.5 24h drift
24 h zero drift and span drift. Not more than ± 3% of full scale.
6.1.6 The influence of environmental temperature changes
When the ambient temperature changes within the span of (15 ~ 35) °C, the
change of non-methane hydrocarbon's indication value. Not more than ±5% of
full scale.
6.1.10 Response factor
When the system measures non-methane hydrocarbons, the relative mass
response factors of other VOCs, as relative to propane, must meet a certain
span of requirements, as shown in Table 1.
6.2 On-site detection of pollutant discharge
6.2.1 Analysis cycle
System analysis cycle. ≤ 3 min.
6.2.2 24h drift
24 h zero drift and span drift. Not more than ± 3% of full scale.
6.2.3 Accuracy
When using the reference method to make measurement, the average
concentration of the non-methane hydrocarbon is.
6.2.4 Performance indicators of exhaust gas parameters
The performance indicator requirements of exhaust gas parameters (oxygen,
flow rate, flue gas temperature, humidity) shall meet the relevant requirements
of HJ 76.
7 Testing method
7.1 Laboratory testing requirements and methods
7.1.1 General requirements
7.1.1.1 Take at least 3 sets of systems of the same model for simultaneous
testing, at the designated laboratory site.
7.1.1.5 If the test is interrupted due to a system failure, restart the test after the
system returns to normal; the completed test indicators and data will be invalid.
During the test period, the number of system failures per unit (set) is ≤ 2.
7.1.1.6 For systems with automatic calibration function, it may set any cycle;
the system will perform automatic calibration; during the testing, the automatic
calibration cycle shall be set to ≥ 24 h.
7.1.2 Standard material requirements
7.1.2.1 Calibration gas. Commercially available certified calibration gas, which
has an uncertainty of ≤ 2.0%.
7.1.3 Laboratory testing methods
7.1.3.1 Analysis cycle
The analysis cycle time refers to the time interval, between the two sets of
measurement results, which are given, during continuous operation of NMHC-
CEMS. There are 3 measurements in 3 consecutive days. The daily analysis
cycle time shall meet the requirements of Table 3.
7.1.3.3 Repeatability
After the system under test is running stably, lead in the span calibration gas.
Record the measured value, after the displayed value is stable. Repeat the
above operation, at least 6 times, by the use of the span calibration gas of the
same concentration. Calculate the repeatability (relative standard deviation) of
the system under test, according to formula (2). The results shall meet the
requirements of Table 3.
7.2.2 On-site testing methods
7.2.2.1 Analysis cycle
The on-site testing method of the analysis cycle time is consistent with the
laboratory testing method, as shown in 7.1.3.1.The results shall meet the
requirements of Table 4.
7.2.2.2 24h drift
The detection methods of on-site 24h zero drift and span drift are consistent
with the laboratory detection methods, as shown in 7.1.3.5.The results shall
meet the requirements of Table 4.
7.2.2.4 Exhaust gas parameters
Refer to HJ 76, for the detection method of exhaust gas parameters (oxygen,
flow rate, smoke temperature, humidity).
8 Quality assurance
8.1 Installation quality assurance
8.1.1 The installation location and on-site supporting environmental conditions
shall meet the requirements of the HJ 75 standard.
8.2 Testing quality assurance
8.2.1 The on-site testing shall be carried out, under the condition that the
stationary pollution source discharges pollutants normally. During the initial
inspection and re-inspection, a dedicated person must be responsible for
supervising the working conditions AND maintain it relatively stable during the
test.
8.2.4 For complete extraction and dilution extraction systems, when performing
zero and span calibration, in principle, the zero gas and calibration gas must
pass through the same path as the sample gas (such as sample collection
device, transmission pipeline, pretreatment, etc.).
8.3 Daily operation quality assurance
8.3.1 Regular calibration
9 Testing items
For the stationary pollution source waste gas NMHC-CEMS, the laboratory
testing and on-site testing items are as shown in Table 3 and Table 4.The on-
site testing items of exhaust gas parameters are as shown in Table 5.See
Appendix B, for the relevant record form.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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