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GB 39726-2020 English PDF

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GB 39726-2020: (Emission Standard of Air Pollutants for Foundry Industry)
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Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB 39726-2020	English	339	Add to Cart	4 days [Need to translate]	(Emission Standard of Air Pollutants for Foundry Industry)	Valid	GB 39726-2020

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Basic data

Standard ID	GB 39726-2020 (GB39726-2020)
Description (Translated English)	(Emission Standard of Air Pollutants for Foundry Industry)
Sector / Industry	National Standard
Classification of Chinese Standard	Z60
Word Count Estimation	16,152
Date of Issue	2020-12-24
Date of Implementation	2021-01-01
Regulation (derived from)	Ministry of Ecology and Environment Announcement No. 71 of 2020; National Standard Announcement No. 31 of 2020
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration

GB 39726-2020: (Emission Standard of Air Pollutants for Foundry Industry)

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Emission Standard of Air Pollutants for Foundry Industry) Foundry Industry Air Pollutant Emission Standard Emission standard of air pollutants for foundry industry Published on 2020-12-08 2021-01-01 Implementation Ministry of Ecology and Environment State Administration for Market Regulation release National Standards of People's Republic of China ICS 13.040.40 Z 60 i directory Foreword...ii 1 Scope...1 2 Normative references...1 3 Terms and Definitions...2 4 Organised emission control requirements...5 5 Requirements for fugitive emission control...7 6 Requirements for monitoring pollutants at the boundary of enterprises...9 7 Pollutant Monitoring Requirements...9 8 Implementation and Supervision...10 Appendix A (Informative Appendix) Monitoring Requirements for Unorganized Emissions in the Plant...12

1 Foundry Industry Air Pollutant Emission Standard

1 Scope of application

This standard specifies the air pollutant emission control requirements, monitoring and supervision and management requirements for the foundry industry. This standard is applicable to the management of air pollutant emissions of existing foundry industrial enterprises or production facilities, as well as the environment of foundry industrial construction projects Impact assessment, design of environmental protection facilities, completed environmental protection acceptance, issuance of pollutant discharge permits and management of air pollutant emissions after they are put into operation. Foundry pig iron enterprises, as well as blast furnaces, sintering, and pelletizing processes in foundry enterprises are subject to GB 28663, GB 28662 relevant provisions.

2 Normative references

This standard refers to the following documents or clauses thereof. For dated references, only the dated version applies to this standard. For undated references, the latest edition (including all amendments) applies to this standard. GB 28662 Iron and Steel Sintering and Pelletizing Industrial Air Pollutants Emission Standard GB 28663 Ironmaking Industry Air Pollutant Emission Standard GB 37822 Volatile organic compound fugitive emission control standard GB/T 4754-2017 National Economic Industry Classification GB/T 15264 Determination of lead in ambient air flame atomic absorption spectrophotometry GB/T 15432 Determination of total suspended particulate matter in ambient air by gravimetric method GB/T 16157 Determination of particulate matter in exhaust gas from stationary pollution sources and sampling methods for gaseous pollutants GB/T 16758 Classification and technical conditions of exhaust hoods HJ 38 Determination of total hydrocarbons, methane and non-methane total hydrocarbons in waste gas from stationary pollution sources by gas chromatography HJ/T 42 Determination of nitrogen oxides in exhaust gas from stationary pollution sources by UV spectrophotometry HJ/T 43 Determination of nitrogen oxides in exhaust gas from stationary pollution sources - Naphthalene ethylenediamine hydrochloride spectrophotometric method HJ/T 55 Technical guidelines for monitoring fugitive emissions of air pollutants HJ/T 56 Determination of sulfur dioxide in exhaust gas from stationary pollution sources by iodometric method HJ 57 Determination of Sulfur Dioxide in Waste Gas from Stationary Pollution Source Constant Potential Electrolysis HJ 75 Technical Specification for Continuous Monitoring of Flue Gas (SO2, NOx, Particulate Matter) Emissions from Stationary Pollution Sources HJ/T 397 Technical Specification for Stationary Source Waste Gas Monitoring HJ 539 Determination of Lead in Ambient Air Graphite Furnace Atomic Absorption Spectrophotometry HJ 604 Determination of Total Hydrocarbons, Methane and Non-Methane Total Hydrocarbons in Ambient Air Direct Injection-Gas Chromatography HJ 629 Determination of Sulfur Dioxide in Exhaust Gas from Stationary Pollution Source Non-dispersive Infrared Absorption Method HJ 657 Determination of lead and other metal elements in air and exhaust particulates Inductively coupled plasma mass spectrometry HJ 685 Determination of Lead in Exhaust Gas from Stationary Pollution Source Flame Atomic Absorption Spectrophotometry 2HJ 692 Determination of nitrogen oxides in waste gas from stationary pollution sources by non-dispersive infrared absorption method HJ 693 Determination of nitrogen oxides in waste gas from stationary pollution sources by constant potential electrolysis HJ 732 Sampling air bag method for volatile organic compounds in waste gas from stationary pollution sources HJ 734 Determination of Volatile Organic Compounds in Waste Gas from Stationary Pollution Sources Solid Phase Adsorption-Thermal Desorption/Gas Chromatography-Mass Spectrometry HJ 777 Determination of Metal Elements in Air and Exhaust Particulates by Inductively Coupled Plasma Emission Spectrometry HJ 819 General Principles of Technical Guidelines for Self-Monitoring of Pollutants HJ 836 Gravimetric Method for Determination of Low-Concentration Particulate Matter in Exhaust Gas from Stationary Pollution Sources HJ 944 General Principles of Technical Specifications for Environmental Management Ledger and Pollution Permit Implementation Report of Pollutant Discharging Units (Trial) HJ 1131 Portable UV Absorption Method for Determination of Sulfur Dioxide in Waste Gas from Stationary Pollution Sources HJ 1132 Portable UV Absorption Method for Determination of Nitrogen Oxides in Exhaust Gas from Stationary Pollution Sources WS/T 757-2016 Technical Specification for Wind Speed Detection and Evaluation of Local Exhaust Facilities "Administrative Measures for Automatic Monitoring of Pollution Sources" (Order No. 28 of the State Environmental Protection Administration) Measures for the Administration of Environmental Monitoring (Order No. 39 of the State Environmental Protection Administration) "Technical Guidelines for Continuous Monitoring of Non-methane Total Hydrocarbon Emissions in Waste Gas from Stationary Pollution Sources (Trial)" (Environmental Office Monitoring Letter [2020] No. 90)

3 Terms and Definitions

The following terms and definitions apply to this standard. 3.1 foundry industry Manufacturing of various metal castings. It belongs to the metal products industry in GB/T 4754-2017 and is classified as ferrous metal casting (C 3391) and non-ferrous metal casting (C 3392). Ferrous metal casting refers to the manufacture of various finished and semi-finished products such as iron castings and steel castings; non-ferrous metal castings Manufacturing refers to the manufacture of various finished and semi-finished products such as non-ferrous metals and their alloy castings. 3.2 foundry Smelting metal, making molds, and pouring molten metal into molds, solidifying to obtain metal parts of certain shape, size, and properties Forming method of blanks. 3.3 metal melting The process of transforming the metal charge into a molten state by heating and adjusting it to the desired composition of the casting. 3.4 cupola cupola A vertical cylindrical iron furnace with pig iron and (or) scrap iron and steel as metal charge. According to the melting supply air temperature, it is divided into cold air cupola (drum Air temperature≤400℃) and hot air cupola (blast temperature >400℃). 3.5 electronic arc furnace A furnace in which an electric arc is generated between the electrodes and the charge to smelt metal. 3.6 gas smelting furnace A smelting (chemical) furnace for casting that uses only gaseous fuels (LPG, natural gas, coal gas, etc.). 33.7 electric induction furnace Furnace for heating, smelting metal and keeping molten metal warm by induction current. 3.8 holding furnace A furnace that stores molten metal smelted in a smelting furnace and keeps it at the proper temperature. 3.9 refining furnace A furnace for removing gas, impurity elements and inclusions in liquid metal, purifying molten metal and improving the quality of molten metal. 3.10 molding The process of making molds with process equipment such as casting materials and patterns. 3.11 core making The process of making core sand into a core box shape. 3.12 pouring The process of pouring molten metal from a ladle into a mold. 3.13 falling sand shakeout The process of separating the casting from the mold (core) sand by hand or mechanical methods can be carried out with a sand box or after the poke. 3.14 sand treatment sand preparation The process of batching and mixing molding sand according to process requirements, including drying of original sand and treatment of used sand. 3.15 sand reclamation The process of treating waste sand by roasting, wind blowing, water washing or machinery, so that its performance can replace new sand. 3.16 heat treatment for castings The heat treatment process is used to obtain the required mechanical properties or use requirements of the casting. 3.17 surface coatingsurface coating In order to protect or decorate the processing object, the process of coating the surface of the processing object with a coating film layer. 3.18 volatile organic compounds (VOCs) Organic compounds participating in atmospheric photochemical reactions, or organic compounds determined according to relevant regulations. When characterizing the overall emission of VOCs, according to industry characteristics and environmental management requirements, total volatile organic compounds (with TVOC) can be used. expressed), non-methane total hydrocarbons (expressed as NMHC) as pollutant control items. 43.19 total volatile organic compounds (TVOC) The specified monitoring method is used to measure the single VOCs substances in the exhaust gas, and the total amount of VOCs substances is obtained by summing up the single items. The sum of the mass concentrations of VOCs substances. In actual work, the single VOCs substances that account for more than 90% of the total should be analyzed according to the expected analysis results. Measure and add up. 3.20 non-methane hydrocarbon (NMHC) Using the specified monitoring method, the sum of the gaseous organic compounds, excluding methane, for which the hydrogen flame ionization detector responds, in terms of carbon mass concentration meter. 3.21 VOCs-containing materials Raw and auxiliary materials, products and wastes (slag, liquid) with a mass proportion of VOCs greater than or equal to 10%, as well as organic polymer raw and auxiliary materials and wastes material (slag, liquid). 3.22 fugitive emission Irregular emissions of air pollutants that do not pass through exhaust stacks, including emissions from open workplaces, and through crevices, vents, open Discharge of doors, windows and similar openings (holes), etc. 3.23 airtight closed/close Contaminants are not in contact with the ambient air, or are isolated from the ambient air by sealing materials, sealing equipment, or operating methods. 3.24 closed space closed space A closed area or closed building formed by using a complete envelope to block pollutants, workplaces, etc. from the surrounding space. Except for personnel, vehicles, equipment, and materials entering and leaving the closed area or closed building, as well as the exhaust pipes and vents established according to law, the door shall be closed. Windows and other openings (holes) should be kept closed at all times. 3.25 Existing enterprise existing facility Foundry industrial enterprises or production facilities that have been completed and put into production or whose environmental impact assessment documents have been approved before the implementation of this standard. 3.26 New enterprise new facility From the date of implementation of this standard, the new construction, reconstruction and expansion of foundry industry construction projects whose environmental impact assessment documents have passed the examination and approval. 3.27 key regions According to the requirements of environmental protection work, the air pollution is serious, or the ecological environment is fragile, or there is a need for further improvement of ambient air quality, etc. Areas that require strict control of air pollutant emissions. 3.28 standard state The state at a temperature of 273.15 K and a pressure of 101.325 kPa. The air pollutant emission concentration limits stipulated in this standard are all in standard form 7 The oxygen content of the exhaust gas entering the VOCs combustion (incineration, oxidation) device can meet the needs of its own combustion and oxidation reactions, and no additional supplement is required Air (except for the burner that needs supplementary air to support combustion), the measured mass concentration is used as the basis for determining the compliance, but the flue gas at the outlet of the device contains oxygen The amount shall not be higher than the oxygen content of the exhaust gas at the inlet of the device. Other VOCs treatment facilities such as adsorption, absorption, condensation, biological, membrane separation, etc., use the measured mass concentration as the basis for determining the compliance, and do not Diluted emissions. 4.7 Except for mobile dust removal equipment, the height of the exhaust pipe of other workshops or production facilities shall not be less than 15 m, and the specific height shall be The relative height relationship should be determined according to the environmental impact assessment document. 4.8 When the exhaust gas combined with exhaust pipe discharge with different emission control requirements is implemented, it shall be monitored before the exhaust gas is mixed, and the corresponding exhaust gas shall be implemented. Emission control requirements; if the optional monitoring position can only monitor the mixed exhaust gas, the most stringent regulations in each emission control requirement shall be followed. will be implemented.

5 Requirements for fugitive emission control

5.1 Scope and time of execution 5.1.1 From January 1, 2021, new enterprises, and existing enterprises from July 1, 2023, the fugitive emission control shall comply with this standard implementation of the regulations. 5.1.2 Enterprises in key areas shall implement special control requirements for fugitive emissions, and the geographical scope and time of implementation shall be determined by the State Council Ecological Environment Supervisor Department regulations. Where the competent department of ecological environment under the State Council has not made a provision, the provincial people's government may prescribe the geographical scope and time of enforcement within its jurisdiction. 5.2 Control measures for fugitive emission of particulate matter 5.2.1 Material storage 5.2.1.1 Powdered materials such as pulverized coal, bentonite, and silica sand should be packed in bags or cans, and stored in closed storage or semi-closed stockyards (sheds). The semi-closed stockyard (stack shed) should have walls (enclosures) and roofs on at least two sides. 5.2.1.2 Granular and bulk bulk materials such as pig iron, scrap steel, coke and ferroalloy shall be stored in closed storage warehouses, silos, or In the closed stockyard (stack shed), or around, set up wind and dust suppression nets, wind barriers, or take covering measures. The semi-closed stockyard (shed) shall be at least There are walls (enclosures) and roofs on both sides; the height of wind and dust suppression nets and wind walls should not be lower than 1.1 times the height of the stockpiled materials. 5.2.2 Material Transfer and Conveying 5.2.2.1 In the process of transferring and conveying powdery and granular materials that are easy to emit dust in the factory, dust suppression measures such as sealing or covering should be taken; In the process of conveying, loading and unloading, dust-generating points should take dust-collecting and dust-removing measures, or dust-suppressing measures such as spraying (fog). 5.2.2.2 The dust discharge port of the dust collector shall be shielded and other dust suppression measures shall be taken, and the dust dust shall not be directly discharged to the ground. Dust removal is bagged or canned and other airtight measures to collect, store and transport. 5.2.2.3 The roads in the factory area shall be hardened, and measures such as regular cleaning and watering shall be taken to keep them clean. 5.2.3 Casting 5.2.3.1 The charging port of the cupola should be in a negative pressure state to prevent dust leakage. 5.2.3.2 The dust-generating point of the molten metal processing process such as inoculation, metamorphism, and refining outside the furnace shall be installed with a gas collecting hood and equipped with dust removal facilities. 5.2.3.3 Dust-generating hoods and dust-removing facilities shall be installed at the dust-generating points of molding, core-making and pouring processes, or dust suppression measures such as spraying (fog) shall be adopted. 5.2.3.4 The process of falling sand, shot blasting and sand treatment shall be operated in a closed space, and the exhaust gas shall be collected to the dust removal facility; 8 For operation, fixed and mobile gas gathering equipment should be used, and dust removal facilities should be provided. 5.2.3.5 The cleaning (removal of pouring risers, shovel burrs, etc.) and maintenance procedures for ladle and slag ladle should be operated in a closed space, and the waste gas should be collected. Collected to dust removal facilities; if it is not operated in a closed space, fixed or mobile gas collection equipment should be used and equipped with dust removal facilities, or spraying (fog) and other dust suppression measures. 5.2.3.6 There shall be no visible smoke and dust escaping outside the workshop. 5.2.4 Special control requirements for fugitive emissions of particulate matter 5.2.4.1 Granular and bulk bulk materials such as pig iron, scrap steel, coke and ferroalloy shall be stored in closed storage warehouses, silos, or In closed stockyards (sheds). The semi-closed stockyard (stack shed) shall have walls (enclosures) and roofs on at least two sides, and the materials shall be covered and sprayed. Dust suppression measures such as showering (fog). 5.2.4.2 The transfer and conveying process of powdery, granular and other materials that are easy to emit dust in the factory should be closed; Dust point should take measures to collect dust, or spray (fog) and other dust suppression measures. 5.2.4.3 Gas collection hoods shall be set up in the processing procedures of raw materials such as scrap steel and returned material, and dust removal facilities shall be provided. 5.2.4.4 The cleaning (removal of pouring risers, shovel burrs, etc.) and maintenance procedures of ladle and slag ladle shall be performed in a closed space, and waste gas shall be collected To dust removal facilities; if it is not operated in a closed space, fixed and mobile gas collection equipment should be used and equipped with dust removal facilities. 5.2.4.5 The relevant regulations in 5.2.1, 5.2.2 and 5.2.3 shall still be implemented for the fugitive emission control requirements in other links. 5.3 VOCs fugitive emission control measures 5.3.1 Storage and transfer of VOCs materials 5.3.1.1 VOCs materials such as coatings, resins, curing agents, thinners, and cleaning agents should be stored in airtight containers, packaging bags, and storage. 5.3.1.2 Containers or packaging bags containing VOCs materials should be stored indoors, or stored in special areas equipped with canopies, shading and anti-seepage facilities. Use the venue. Containers or packaging bags containing VOCs materials should be covered, sealed and kept closed when not in use. When transferring VOCs materials, A closed container should be used. 5.3.1.3 The VOCs material storage should meet the requirements for confined space in Article 3.24. 5.3.2 Surface coating The batching, painting and cleaning operations of surface coating should be carried out in a closed space, and the exhaust gas should be discharged to the exhaust gas collection and treatment system; it cannot be sealed If not, local gas collection and treatment measures should be taken. 5.3.4 Other VOCs fugitive emission control requirements Equipment and pipeline components VOCs leakage control requirements, open liquid surface VOCs fugitive emission control requirements, should comply with the regulations of GB 37822 Certainly. 5.4 Operation and Recording Requirements 5.4.1 The setting of the exhaust hood (gas collection hood) of the VOCs fugitive emission exhaust gas collection system shall comply with the provisions of GB/T 16758.using external If the exhaust hood is used, the wind speed should be measured and controlled according to the methods specified in GB/T 16758 and WS/T 757-2016, and the measurement point should be selected at the distance from the exhaust hood. For the fugitive emission position of VOCs farthest from the mouth, the controlled wind speed should not be lower than 0.3 m/s. 5.4.2 The conveying pipeline of the exhaust gas collection system shall be sealed. The exhaust gas collection system should operate under negative pressure. under positive pressure, should not There are sensory perceptible leaks; for VOCs exhaust gas collection systems, the sealing points of exhaust gas delivery pipeline assemblies should be in accordance with the provisions of GB 37822 9 For leak detection and repair, the leak detection value of VOCs should not exceed 500 μmol/mol. 5.4.3 The fugitive emission waste gas collection and treatment system should run synchronously with the production process equipment. Failure or overhaul of the exhaust gas collection and treatment system The corresponding production process equipment should be stopped, and put into use synchronously after troubleshooting or maintenance is completed; the production process equipment cannot be stopped. If it is running or cannot be stopped in time, emergency treatment facilities for waste gas should be set up or other alternative measures should be taken. 5.4.4 The enterprise shall establish a ledger in accordance with the requirements of HJ 944 to record the fugitive emission waste gas collection system, pollution control facilities and other unorganized Main operational information of emission control measures, such as operating time, exhaust gas collection and treatment amount, key operating parameters of VOCs treatment facility (operation operating temperature, residence time, adsorbent regeneration/replacement cycle and replacement amount, amount of absorbing liquid, etc.), spray/spray (water or other chemically stable agent) operating cycle and dosage, etc. The ledger storage period is not less than 3 years. 5.5 Monitoring Requirements for Unorganized Emissions in Enterprise Plants Local governments can monitor the unorganized emission of particulate matter and VOCs in the plant according to local environmental protection needs. It shall be submitted to the provincial people's government for approval by the local competent department of ecological environment. See Appendix A for the monitoring requirements for fugitive emissions in the plant.

6 Requirements for monitoring pollutants at the boundary of enterprises

6.1.1 Enterprises should manage and control the discharge of toxic and harmful air pollutants, and take effective measures to prevent environmental risks. 6.1.2 Starting from January 1, 2021 for newly-built enterprises, and starting from July 1, 2023 for existing enterprises, air pollution at the boundary of the enterprise for any one hour The average concentration of dyes shall comply with the limits specified in Table 4.

7 Pollutant Monitoring Requirements

7.1 General requirements 7.1.1 The enterprise shall establish an enterprise monitoring system, formulate monitoring The plan is to carry out self-monitoring of air pollutant emissions, keep original monitoring records, and publish monitoring results. 7.1.2 The requirements for enterprises to install automatic monitoring equipment for air pollutant emissions, according to relevant laws and the "Administrative Measures for Automatic Monitoring of Pollution Sources", etc. Regulations are enforced. 7.1.3 Enterprises should design, build, maintain permanent sampling ports, and conduct sampling tests in accordance with the requirements of environmental monitoring management regulations and technical specifications. Platform and Outfall Signs. 7.1.4 The monitoring of air pollutants shall be carried out at the specified monitoring location. If there are waste gas treatment facilities, the monitoring shall be carried out after the treatment facilities. 7.2 Monitoring sampling and analysis methods 7.2.1 The monitoring and sampling of air pollutants in the exhaust pipe shall be in accordance with GB/T 16157, HJ/T 397, HJ 732 and HJ 75, "Stationary Pollution Source Waste Technical Guidelines for Continuous Monitoring of Total Non-methane Hydrocarbon Emissions in Gas (Trial)”. For pollution sources whose emission intensity fluctuates periodically, the 8.4 For the enterprise boundary, when manual monitoring or online monitoring is used, any 1-hour average concentration value measured according to the requirements of the monitoring specification exceeds The limit specified in this standard is judged as exceeding the standard. 8.5 If the enterprise fails to comply with the measure control requirements stipulated in this standard, which constitutes an illegal act, it shall be dealt with in accordance with relevant regulations such as laws and regulations.

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