HJ 57-2017 PDF English
US$145.00 · In stock · Download in 9 secondsHJ 57-2017: Stationary source emission - Determination of sulfur dioxide - Fixed potential by electrolysis method Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid HJ 57: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| HJ 57-2017 | English | 145 |
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Stationary source emission - Determination of sulfur dioxide - Fixed potential by electrolysis method
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| HJ/T 57-2000 | English | 70 |
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Determination of sulphur dioxide from exhausted gas of stationary source - Fixed-potential electrolysis method
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Similar standards HJ/T 55 HJ/T 45 HJ 75 HJ 57-2017: Stationary source emission - Determination of sulfur dioxide - Fixed potential by electrolysis method
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/HJ57-2017
ENVIRONMENTAL PROTECTION STANDARD
Replacing HJ 57-2000
Stationary source emission - Determination of sulfur
dioxide - Fixed potential by electrolysis method
Issued on. NOVEMBER 28, 2017
Implemented on. JANUARY 01, 2018
Issued by. Ministry of Environmental Protection
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 5
4 Principle of method... 7
5 Interference and elimination... 7
6 Reagents and materials... 8
7 Instruments and equipment... 8
8 Sampling and determination... 9
9 Calculation and representation of results... 10
10 Precision and accuracy... 11
11 Quality assurance and quality control... 12
12 Precautions... 13
Appendix A (Informative) Carbon monoxide interference test - Dynamic aeration
matrix test method... 15
Appendix B (Informative) Instrument performance review results before and
after measurement... 22
1 Scope
This standard specifies the fixed potential electrolysis method for the
determination of sulfur dioxide in stationary source emission.
This standard applies to the determination of sulfur dioxide in stationary source
emission.
The detection limit of this standard is 3 mg/m3.The lower limit of determination
is 12 mg/m3.
2 Normative references
The contents of this standard refer to the following documents or their terms.
For undated references, the valid version applies to this standard.
GB/T 16157 The determination of particulates and sampling methods of
gaseous pollutants emitted from exhaust gas of stationary source
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
HJ/T 46 Technical conditions of detector of sulfur dioxide concentration for
constant potential electrolysis method
HJ/T 373 Technical specifications of quality assurance and quality control for
monitoring of stationary pollution source (on trial)
HJ/T 397 Technical specifications for emission monitoring of stationary
source
3 Terms and definitions
3.1
Zero gas
The gas which has no measurement component or less than the specified
value, meanwhile other component’s concentrations do not interfere with the
measurement component results or the interference from the resulting
measurement component is negligible.
3.3
Calibration error
The error between the measurement result of standard gas as directly led
into the analyzer and the concentration value of the standard gas.
3.4
System bias
The percentage of the difference between the measurement result of the
standard gas as directly led into the analyzer and the measurement result of
the gas as led into the instrument via the sampling tube to the calibration
span.
3.5
Zero drift
Before and after the test, the percentage of the difference between the
analyzer for the measurement results of same zero gas, to the calibration
span.
4 Principle of method
The sample is taken into a sensor consisting mainly of an electrolytic cell, an
electrolyte, electrodes (sensitive electrode, reference electrode, counter
electrode). Sulfur dioxide diffuses through the permeable membrane to the
surface of the sensitive electrode; an oxidation reaction occurs on the sensitive
electrode.
5 Interference and elimination
5.1 The particulate matter, moisture and sulfur trioxide in the gas to be tested
are easy to condense on the surface of the sensor’s permeable membrane and
cause damage to the sensor, which affects the determination; it shall be filtered
by a dust filter device, a dehumidifier, a mist filter, etc. to eliminate the influence.
5.3 Carbon monoxide’s interference is significant, so the concentration of
carbon monoxide must be determined simultaneously when measuring the
sample. When the concentration of carbon monoxide does not exceed 50
μmol/mol, the sample can be determined by this standard.
6 Reagents and materials
6.1 Sulfur dioxide standard gas
Commercially available certified standard gas, uncertainty ≤ 2%.
7 Instruments and equipment
7.1 Fixed potential electrolysis sulfur dioxide analyzer
7.1.1 Composition
Fixed potential electrolysis sulfur dioxide analyzer (shortly referred to as.
analyzer or instrument) consists of. analyzer (including gas flowmeter and
control unit, pump, sensor, etc.), sampling tube (including dust filter, heating
and insulation device), air duct, dehumidifiers, portable printers, etc.
7.1.2 Performance requirements
7.3 Gas bag
Used to calibrate the analyzer by air bag method. The volume is 4 L ~ 8 L; the
lining material shall be selected from the aluminum-plastic composite film,
polytetrafluoroethylene film and other inert materials that have little influence
on the measured components.
7.4 Emission parameter tester
An instrument capable of testing parameters such as moisture content, flue
gas’s temperature, flue gas’s pressure, flue gas’s flow rate, flow rate.
7.5 Carbon monoxide measuring device
A device or apparatus capable of measuring the concentration of carbon
monoxide in an emission.
8 Sampling and determination
8.1 Determination of sampling points and sampling frequency
According to GB/T 16157, HJ/T 397, HJ/T 373, HJ 75 and HJ 76 and related
requirements, determine the sampling position, sampling point, sampling
frequency.
8.3 Calibration of analyzer
8.3.1 Zero calibration
Lead zero gas into the analyzer to calibrate the instrument’s zero point.
8.3.2 Calibration of range
Lead the sulfur dioxide standard gas into the analyzer for measurement. If the
calibration error meets the requirements of 7.1.2 a), the analyzer is available;
otherwise, it requires calibration. The calibration method is as follows.
8.4 Determination of emission parameters
Follow the provisions of GB/T 16157 to determine the emission parameters.
8.5 Determination of samples
8.5.1 Determine the concentration of carbon monoxide in the emission
according to the relevant standards. According to the measurement results,
determine whether the sulfur dioxide in the emission can be determined using
this standard according to 5.3.
8.5.2 Place the front end of the sampling tube of the analyzer on the sampling
point in the emission cylinder; block the sampling hole so that it does not leak.
8.5.3 Start the air pump, to take sample at the sampling flow rate as specified
by the analyzer for measurement. After the analyzer is stable, save the
measurement data in minutes and take the average value of the measured data
for 5 minutes ~ 15 minutes as one measurement value.
8.5.5 After obtaining the measurement result, use the zero gas to clean the
analyzer. After its indication value returns to near zero point, turn off the power
and end the measurement.
9 Calculation and representation of results
9.1 Calculation of results
9.1.1 Calculation of emission flow
According to the provisions of GB/T 16157, calculate the dry exhaust flow Qsn
(m3/h) in the standard state (273 K, 101.325 kPa).
9.1.3 Calculation of sulfur dioxide’s emission rate
ENVIRONMENTAL PROTECTION STANDARD
Replacing HJ 57-2000
Stationary source emission - Determination of sulfur
dioxide - Fixed potential by electrolysis method
Issued on. NOVEMBER 28, 2017
Implemented on. JANUARY 01, 2018
Issued by. Ministry of Environmental Protection
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 5
4 Principle of method... 7
5 Interference and elimination... 7
6 Reagents and materials... 8
7 Instruments and equipment... 8
8 Sampling and determination... 9
9 Calculation and representation of results... 10
10 Precision and accuracy... 11
11 Quality assurance and quality control... 12
12 Precautions... 13
Appendix A (Informative) Carbon monoxide interference test - Dynamic aeration
matrix test method... 15
Appendix B (Informative) Instrument performance review results before and
after measurement... 22
1 Scope
This standard specifies the fixed potential electrolysis method for the
determination of sulfur dioxide in stationary source emission.
This standard applies to the determination of sulfur dioxide in stationary source
emission.
The detection limit of this standard is 3 mg/m3.The lower limit of determination
is 12 mg/m3.
2 Normative references
The contents of this standard refer to the following documents or their terms.
For undated references, the valid version applies to this standard.
GB/T 16157 The determination of particulates and sampling methods of
gaseous pollutants emitted from exhaust gas of stationary source
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
HJ/T 46 Technical conditions of detector of sulfur dioxide concentration for
constant potential electrolysis method
HJ/T 373 Technical specifications of quality assurance and quality control for
monitoring of stationary pollution source (on trial)
HJ/T 397 Technical specifications for emission monitoring of stationary
source
3 Terms and definitions
3.1
Zero gas
The gas which has no measurement component or less than the specified
value, meanwhile other component’s concentrations do not interfere with the
measurement component results or the interference from the resulting
measurement component is negligible.
3.3
Calibration error
The error between the measurement result of standard gas as directly led
into the analyzer and the concentration value of the standard gas.
3.4
System bias
The percentage of the difference between the measurement result of the
standard gas as directly led into the analyzer and the measurement result of
the gas as led into the instrument via the sampling tube to the calibration
span.
3.5
Zero drift
Before and after the test, the percentage of the difference between the
analyzer for the measurement results of same zero gas, to the calibration
span.
4 Principle of method
The sample is taken into a sensor consisting mainly of an electrolytic cell, an
electrolyte, electrodes (sensitive electrode, reference electrode, counter
electrode). Sulfur dioxide diffuses through the permeable membrane to the
surface of the sensitive electrode; an oxidation reaction occurs on the sensitive
electrode.
5 Interference and elimination
5.1 The particulate matter, moisture and sulfur trioxide in the gas to be tested
are easy to condense on the surface of the sensor’s permeable membrane and
cause damage to the sensor, which affects the determination; it shall be filtered
by a dust filter device, a dehumidifier, a mist filter, etc. to eliminate the influence.
5.3 Carbon monoxide’s interference is significant, so the concentration of
carbon monoxide must be determined simultaneously when measuring the
sample. When the concentration of carbon monoxide does not exceed 50
μmol/mol, the sample can be determined by this standard.
6 Reagents and materials
6.1 Sulfur dioxide standard gas
Commercially available certified standard gas, uncertainty ≤ 2%.
7 Instruments and equipment
7.1 Fixed potential electrolysis sulfur dioxide analyzer
7.1.1 Composition
Fixed potential electrolysis sulfur dioxide analyzer (shortly referred to as.
analyzer or instrument) consists of. analyzer (including gas flowmeter and
control unit, pump, sensor, etc.), sampling tube (including dust filter, heating
and insulation device), air duct, dehumidifiers, portable printers, etc.
7.1.2 Performance requirements
7.3 Gas bag
Used to calibrate the analyzer by air bag method. The volume is 4 L ~ 8 L; the
lining material shall be selected from the aluminum-plastic composite film,
polytetrafluoroethylene film and other inert materials that have little influence
on the measured components.
7.4 Emission parameter tester
An instrument capable of testing parameters such as moisture content, flue
gas’s temperature, flue gas’s pressure, flue gas’s flow rate, flow rate.
7.5 Carbon monoxide measuring device
A device or apparatus capable of measuring the concentration of carbon
monoxide in an emission.
8 Sampling and determination
8.1 Determination of sampling points and sampling frequency
According to GB/T 16157, HJ/T 397, HJ/T 373, HJ 75 and HJ 76 and related
requirements, determine the sampling position, sampling point, sampling
frequency.
8.3 Calibration of analyzer
8.3.1 Zero calibration
Lead zero gas into the analyzer to calibrate the instrument’s zero point.
8.3.2 Calibration of range
Lead the sulfur dioxide standard gas into the analyzer for measurement. If the
calibration error meets the requirements of 7.1.2 a), the analyzer is available;
otherwise, it requires calibration. The calibration method is as follows.
8.4 Determination of emission parameters
Follow the provisions of GB/T 16157 to determine the emission parameters.
8.5 Determination of samples
8.5.1 Determine the concentration of carbon monoxide in the emission
according to the relevant standards. According to the measurement results,
determine whether the sulfur dioxide in the emission can be determined using
this standard according to 5.3.
8.5.2 Place the front end of the sampling tube of the analyzer on the sampling
point in the emission cylinder; block the sampling hole so that it does not leak.
8.5.3 Start the air pump, to take sample at the sampling flow rate as specified
by the analyzer for measurement. After the analyzer is stable, save the
measurement data in minutes and take the average value of the measured data
for 5 minutes ~ 15 minutes as one measurement value.
8.5.5 After obtaining the measurement result, use the zero gas to clean the
analyzer. After its indication value returns to near zero point, turn off the power
and end the measurement.
9 Calculation and representation of results
9.1 Calculation of results
9.1.1 Calculation of emission flow
According to the provisions of GB/T 16157, calculate the dry exhaust flow Qsn
(m3/h) in the standard state (273 K, 101.325 kPa).
9.1.3 Calculation of sulfur dioxide’s emission rate
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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