1、 This electronic version is for publication. Please take the formal text published by China Environmental Sciences Press as the standard. HJ Standard of State Environmental Protection Administration HJ/T 76-2007 Substitute of HJ/T 76-2001 Specifications and Test Procedures for Continuous Emission Mo
2、nitoring Systems of Flue Gas Emitted from Stationary Sources (on trial) (Publication Version) Issued on July 12th, 2007 Implemented on August 1st, 2007 Issued by State Environmental Protection Administration Generated by Foxit PDF Creator Foxit Softwarehttp:/ For evaluation only. Preface In order to
3、 implement Environmental Protection Law of the Peoples Republic of China and Law of the Peoples Republic of China on the Prevention and Control of Atmospheric Pollution, and monitor pollutants emitted from stationary sources of air, this standard is herein stipulated. The standard has specified the
4、main technical indices, test items, test procedures and quality assurance measures taken in test for continuous emission monitoring system of flue gas from stationary sources. The continuous emission monitoring system of flue gas within the national environmental monitoring network shall meet the re
5、quirements of this standard. The following revisions for Specifications and Test Procedures for Continuous Emission Monitoring Systems of Flue Gas Emitted from Stationary Sources (HJ/T 76-2001) have been made in this standard: modification of partial technical indices of continuous monitoring system
6、 for particulates and continuous measuring system for flow rates; further definition of test procedures of correlation coefficient in continuous monitoring system for particulates; supplement of technical indices of flue gas parameters and technical requirements for continuous emission monitoring sy
7、stem of flue gas during its running period of 90 days. In its drafting course, this standard has referred to the overseas technical standards, technical indices of continuous monitoring systems of some manufacturers both at home and abroad and standards of enterprises. The standard will come into ef
8、fect from the date of implementation. And the Specifications and Test Procedures for Continuous Emission Monitoring Systems of Flue Gas Emitted from Stationary Sources (HJ/T 76-2001) has to be abandoned. The standard is a guidance standard. The standard is put forward by Department of Science, Techn
9、ology and Standards of State Environmental Protection Administration. The main drafters of the standard: General Environmental Monitoring Station of China, Shanghai Environmental Monitoring Centre, Information Center of State Environmental Protection Administration. The standard was approved by Stat
10、e Environmental Protection Administration on July 12th, 2007. The standard has been implemented from August 1st, 2007. The standard shall be explained by State Environmental Protection Administration. Generated by Foxit PDF Creator Foxit Softwarehttp:/ For evaluation Contents 1 Applicable Scope (1)
11、2 Normative References (1) 3 Terms and Definitions (1) 4 Structure and Description of Continuous Monitoring System (4) 5 Technical Requirements (4) 6 Installation of Continuous Monitoring System and Its Measuring Positions (8) 7 Sampling Positions and Sampling Points for Reference Method (9) 8 Test
12、Procedures for Main Technical Indices of Continuous Monitoring System (10) 9 Quality Assurance (19) 10 Test of Adaptability (23) 11 Test Items (23) Appendix A Attached Table (27) Appendix B Determination of flue gas parameters and requirements of conversion of pollutant concentration and calculation
13、 of flue gas parameters (28) Appendix C Embodiment about calibration of particulates by reference method (32) Appendix D Determine concentrations of SO2 and NOX emitted from stationary pollutant sourceinstrument analysis method (38) Generated by Foxit PDF Creator Foxit Softwarehttp:/ For evaluation
14、1 1. Applicable Scope This standard has specified CEMSs main technical indices, test items, test procedures, and quality assurance measures taken in test. This standard is adaptable to monitor the flue gas parameters of stationary sources, particulates in flue gas, concentrations of SO2and NOX,and C
15、EMS of total emission. 2. Normative References The provisions in the following documents are referred to by this standard. All editions without any date indication are valid and applicable for this standard. GB/T 16157-1996 Measurements of particulates in flue gas emitted from stationary sources and
16、 sampling method for gaseous pollutants. HJ/T 212-2005 Transmission Standard of on-line auto-monitoring system for pollution sources. HJ/T 75-2007 Code for continuous emission monitoring techniques of flue gas emitted from stationary sources. 3. Terms and Definitions Particulates Particulates denote
17、 solid and liquid granular substances suspended in liquids and flue gas generated in burning, synthesis, decomposition of fuels and other substances and in treatment of various materials. Gaseous pollutants Gaseous pollutants denote various pollutants dispersed in flue gases in a gaseous form. Dry f
18、lue gas in standard conditions Dry flue gas in standard conditions denotes the flue gas, free of moisture at 273K and under the pressure of 101325Pa. Continuous emission monitoring, CEM Pollutants emitted form stationary sources are continuously measured by real-time tracing with total measuring hou
19、rs for each stationary source not less than 75% of total running hours of boilers and kilns and furnaces; measuring time each hour is not less than 45min. Continuous Emission Monitoring System, CEMS It includes all the equipment and devices required for continuous measurements of concentrations of p
20、articulates and gaseous pollutants and their emission rates; it is generally composed of three sub-systems of sampling, testing and data collection and processing. Sampling system: collection and transportation of flue gas or isolation of flue gas from the testing system. Testing system: measuring p
21、ollutants, and displaying physical quantity or Generated by Foxit PDF Creator Foxit Softwarehttp:/ For evaluation 2 concentrations of pollutants. Data collection and processing system: data collection and processing, generating charts or report forms, and having controlling and auto operation functi
22、ons. Point CEMS It denotes a CEMS for measurement at a point on cross section of gas flue or duct, or along the path equal to or less than 10% of diameter of cross section. Path CEMS CEMS for measurements along the path equal to or greater than 10% of diameter of cross section of the gas flue or duc
23、t Full scale The maximum measurement value is set for CEMS based on the practical requirements, usually 1-2 times higher than the maximum emission concentration from the emission sources. Zero drift Deviation between the readings of instrument and zero input after CEMS runs for a specified time unde
24、r the premise of maintenance, repair or adjustment scheduled. Span drift Deviation between the readings of instrument and known reference value after CEMS runs for a specified time under the premise of maintenance, repair or adjustment scheduled. Response time The time required when the value displa
25、yed reaches the 90% of stabilized value. Centroidal area Geometrically central area in cross section of the gas flue or duct with its area not greater than 1% of area of the cross section of the gas flue or duct. Pretest preparation period The normal running time of CEMS required (not less than 168h
26、) under the premise of maintenance, repair or adjustment scheduled, before testing the CEMS technical indices. Test period The running time required for testing CEMS technical indices under the premise of maintenance, repair or adjustment scheduled (initial test not less than 168h). Retest period Ru
27、nning time required for retesting CEMS technical indices after the instrument continuously runs for 90 days upon the qualification of testing CEMS technical indices (not less than 24h); unscheduled maintenance, repair or adjustment are not allowed in the retest period. Reference method A standard me
28、thod issued by the state or industry. Correlation A curve for establishing correlation between physical quantity of particulates rendered Generated by Foxit PDF Creator Foxit Softwarehttp:/ For evaluation only. 3 by CEMS and concentration of particulates measured with a reference method. denotes any
29、 measuring instrument of gas parameters and gaseous pollutant CEMS Fig. 4-1 Schematic drawing of continuous emission monitoring system for flue gas Relative accuracy Several data pairs are composed of measuring results of synchronously measuring Particulate CEMS Particulate measuring instrument Zero
30、ing and standardization Sub-system for flue gas parameters Flue gas temperature transmitter Temperature measuring instrument Pressure measuring instrument Flue gas pressure transmitter Flue flow rate transmitter Flow rate measuring instrument Humidity measuring instrument Oxygen measuring instrument
31、 CO2measuring instrument Flue humidity transmitter Oxygen content transmitter CO2 content transmitter Gaseous pollutant CEMS Gaseous pollutant analyzer Gas controller Gaseous pollutant analyzer Atmospheric pressure measuring instrument Gaseous pollutant sampler Flue gas pretreatment device Gaseous p
32、ollutant sampler Blank and standardized gas Dilute gas Gaseous pollutant analyzer Blank, standardized gas or calibration unit ? Atmospheric pressure transmitter Input humidity quantity Full extraction method Diluting extraction method Direct measuring method Input atmospheric pressure Data collectio
33、n and processing system Data collectionand control systemStationary source monitoring systemData processingandremote communicationsystem Printing Displaying Data monitoringcenterBlank and standardized gas or or Formatted: Font: (Asian) 宋体, (Asian)Chinese (PRC)Formatted: Font: 9.5 pt, Font color: Aut
34、oFormatted: Font: 9 ptFormatted: Font: 9 ptGenerated by Foxit PDF Creator Foxit Softwarehttp:/ For evaluation only. 4 concentrations of gaseous pollutants in flue gas at the same time intervals with a reference method and CEMS method. The relative accuracy is a ratio of sum of absolute value of the
35、average of differences of the data pairs and coefficient of confidence to the average of data measured with the reference method. Velocity field coefficient A ratio of average flow rate of flue gas running through a cross section of the gas flue or duct measured with a reference method to an average
36、 flow rate of the flue gas measured at a fixed point or measuring line of the same cross section or different cross section. 4. Structure and Description of Continuous Monitoring System The CEMS for flue gas emitted from stationary sources is composed of a CEMS for particulates and/or a CEMS for gas
37、eous pollutants (containing O2or CO2) and a sub-system for flue gas parameters (see Fig. 4-1). It is used to measure the concentrations of pollutants in flue gas via sampling mode and non-sampling mode, as well as the temperature, pressure, flow rate or flow, and humidity (or humidity in input flue
38、gas), oxygen content (or CO2content) in the flue gas, calculate the emission rate and quantity of pollutants in flue gas, and display and print various parameters and charts which are then transferred to the management department via a facsimile transmission system. 5. Technical Requirements Appeara
39、nce requirement It shall be provided with CMC mark for manufacture of the measuring devices (certificates issued by the quality and technology supervision division of our country for measuring devices are required for imported products) and product nameplate on which the name, model number, manufact
40、urer, ex-factory No., and date of manufacture of the instruments or devices shall be all indicated. It shall be reliable with connections among each part of the instrument with no apparent defects on its surface. It is flexible for operational buttons and correct for positioning. It is clear for gra
41、duates and numbers with its firmly attachment of colors on scale of display of the instrument and with no defect in readings. Shell or outer cover of the instrument shall be featured as anti-corrosion, good seal, and prevention of dust and water. Environmental conditions It can normally work under t
42、he following conditions: a. environmental temperature: -20 - 45; b. relative humidity: 90%; c. atmospheric pressure: 86 106kPa; d. flue gas temperature: 50mg/m3- 100mg/m3, the relative error of average of the measured results by CEMS method and reference method shall not exceed 25%; c. 100mg/m3- 200
43、mg/m3, the relative error of average of the measured results by CEMS method and reference method shall not exceed 20%; d. 200mg/m3, the relative error of average of the measured results by CEMS method and reference method shall not exceed 15%. Main technical indices of CEMS for gaseous pollutants (i
44、ncluding O2or CO2) Linear error: the relative error of measured values by CEMS and reference method shall not exceed 5% if checked with a low, medium and high concentration of standard gases. Response time: 200s. Zero drift: zero drift does not exceed 2.5% of full range within 24h. Span drift: span
45、drift does not exceed 2.5% of full range within 24h. Relative accuracy: When average concentration of SO2and NOXin flue gas measured with a reference method: a. 250mol/mol (the concentrations of SO2, NO and NO2are 715mg/m3, 335mg/m3and 513mg/m3respectively), the relative accuracy does not exceed 15%. Generated by Foxit PDF Creator Foxit Softwarehttp:/ For evaluation only. 8 b. 10m/s, t
