With the rapid development of industrialization, the problem of fugitive emissions of volatile organic compounds (VOCs) is becoming more and more serious, which poses a great threat to the environment and human health. Due to the differences in production processes, emission characteristics and treatment technologies in different industries, how to formulate scientific, reasonable and feasible VOCs fugitive emission standards has become an urgent problem to be solved. This paper will provide a reference for the formulation of relevant policies and corporate governance.
Including but not limited to pharmaceutical, pesticide, coatings, inks, adhesives, dyes, daily chemicals, chemical additives, synthetic leather, rubber products, plastic products, chemical fibers, organic chemical raw materials manufacturing and other chemical industries, the use of coatings, inks, adhesives and other organic solvents of furniture, parts manufacturing, steel structure, aluminum profiles, casting, metal surface treatment, wire and cable manufacturing, color coated plates, industrial coating, electronic components manufacturing, auto repair, packaging and printing, wood-based panels, leather products, Footwear and other industries, as well as textile printing and dyeing, injection molding, etc.
1. The "Emission Standard for Pollutants in the Petroleum Refining Industry" (GB 31570-2015), the "Emission Standard for Pollutants in the Petrochemical Industry" (GB31571-2015), the "Emission Standard for Pollutants in the Synthetic Resin Industry" (GB 31572-2015) and the recently released "Emission Standard for Air Pollutants in the Pharmaceutical Industry" (GB 37823- 2015) that have been implemented before the release of the "Fugitive Emission Control Standard for Volatile Organic Compounds" (GB 37822-2019) and the recently released "Emission Standard for Air Pollutants in the Pharmaceutical Industry" (GB 37823- 2019) and the "Emission Standards for Air Pollutants in the Coatings, Inks and Adhesives Industry" (GB 37824-2019), which have specified the source items (storage tanks, leaks, etc.) of VOCs, and the fugitive emission control of these industries shall be implemented in accordance with the industry emission standards, and the general requirements of GB 37822-2019 shall not be implemented.
2. For the emission standards of rubber products, synthetic leather and artificial leather, coking and other industries involving VOCs emission control, the VOCs organized emission control shall be implemented in accordance with the corresponding emission standards, and the fugitive emission control shall be implemented in accordance with the provisions of GB 37822-2019 because the industry emission standards do not stipulate the requirements of fugitive emission control measures.
3. For VOCs industries that do not have industry-specific emission standards, the provisions of the Comprehensive Emission Standard for Air Pollutants (GB 16297-1996) shall be implemented for organized emission control, and the provisions of GB 37822-2019 shall be implemented for unorganized emission control.
4. If there are stricter requirements of local emission standards, the provisions of local standards shall be implemented.
The standard requires enterprises to implement whole-process control in the storage, transportation, use, and disposal of VOCs materials. The main ones are:
1.Material storage. VOCs materials are required to be stored in closed containers, bags, tanks, warehouses, silos, etc.
2.Material transfer and conveying links. Among them, liquid VOCs materials should be transported by closed pipelines;Powdery and granular VOCs materials should be conveyed by pneumatic conveying equipment, tubular belt conveyors, screw conveyors and other closed conveying methods, or by closed packaging bags, containers or tankers for material transfer.
3.Process. Mainly in the chemical industry, involving material loading and unloading, chemical reaction, separation and refining, vacuum system, ingredient processing and packaging of VOCs-containing products.
4.Use of products containing VOCs. There are many industries involved, from the perspective of operation processes, mainly including: blending (mixing, stirring, etc.), coating (spraying, dipping, spraying, roller coating, brushing, coating, etc.), printing (lithograph, letterpress, gravure, stencil, etc.), bonding (gluing, hot pressing, compounding, laminating, etc.), printing and dyeing (dyeing, printing, shaping, etc.), drying (drying, air drying, drying, etc.), cleaning (dipping, spraying, leaching, rinsing, scrubbing, etc.), and organic polymer mixing mixing, plasticizing, melting, processing and molding (extrusion, injection molding, pressing, calendering, foaming, spinning, etc.), etc.
5.VOCs leakage control of equipment and pipeline components. Special attention should be paid to enterprises with more than 2,000 sealing points (inclusive) to carry out leak detection and repair (LDAR) work.
6.Open liquid level VOCs control requirements. Many highly concentrated wastewater contains VOCs, which are transferred from water to the atmosphere during wastewater treatment (e.g. aeration). If the VOCs detection concentration is 100 mol mol at 100mm above the open liquid level, it should be covered and collected in a closed manner.
* |Qinghui environmental protection.
Edit |Small fish.
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