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Ministry of Emergency Management: Phasing out 7 outdated processes, technologies, and equipment for hazardous chemicals

2024-03-16View Original

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Recently, the Ministry of Emergency Management issued the \"Catalogue of Obsolete Safety Production Processes, Technologies and Equipment for Hazardous Chemicals (Second Batch)\\" (hereinafter referred to as the \"Catalogue\"), specifying 7 types of obsolete processes, technologies and equipment for hazardous chemicals, including 4 process technologies and 3 pieces of equipment and facilities. As of the date of issuance of this document, the use of such items is strictly prohibited in new (expanded) construction projects.   The obsolete process technologies to be phased out include: the fixed-bed hydrogen peroxide production process involving alternating use of acids and bases, which is classified as prohibited; new (expanded) projects are not allowed to use this method, while existing projects must complete the transformation within five years. The manual removal of silicone sludge and the open-type sludge hydrolysis technique are also classified as prohibited, with new (expanded) projects forbidden from using them, and existing projects required to complete the transformation within two years. The batch carbonization process for producing strontium carbonate and barium carbonate (using wet hydrogen sulfide gas holders) is also prohibited; new (expanded) projects are not allowed to employ this method, while existing strontium carbonate production facilities must complete the transformation within one year, and existing barium carbonate production facilities must do so within two years. The batch or semi-batch batch nitration process is classified as a restricted process; the use of 27 specific chemicals is prohibited in this process, and transformation must be completed within two years.   Equipment that should be phased out includes: electrically heated reaction kettles with internal heat transfer oil circulation and no cooling system (oil bath reaction kettles, oil bath pots), which are classified as restricted equipment; such kettles used in processes involving highly hazardous chemical reactions are prohibited from use, and existing units must be replaced within one year. Internal floating roof tanks used in oil depots that feature shallow disk-type or open-compartment internal floating roofs are also classified as prohibited equipment; oil depots that hold a license to handle hazardous chemicals are required to stop using such tanks, and existing units must be modified within two years. Centrifugal pumps with single-face mechanical seals and those with packing seals (except submersible pumps) are also classified as prohibited equipment; they are prohibited from use for hazardous chemicals classified as Category A, extremely hazardous, highly hazardous, or those whose operating temperature exceeds their auto-ignition point, and existing units must be replaced within three years.   To implement the \"Catalogue,\" various regions are required to strengthen publicity and guidance, disseminate relevant information through multiple channels, organize enterprises to conduct self-inspections in accordance with the Catalogue, clarify the current situation and maintain records, ensure that all necessary changes are made as soon as possible, and take legal action against those who fail to complete the required changes by the deadline. Experts are organized to provide enhanced guidance and support; a customized approach is adopted for each enterprise to improve the quality of the renovations, and enterprises are urged to ensure safe production during the renovation process to prevent accidents. By working in conjunction with efforts to improve the safety of old chemical processing facilities and to automate high-risk processes, we will ensure the implementation of the three-year action plan aimed at addressing the fundamental issues related to the safe production in the chemical industry and handling of hazardous chemicals, thereby providing a high level of safety to support high-quality development.   It is reported that in October 2020, the Ministry of Emergency Management issued the \"Catalogue of Obsolete Processes, Technologies and Equipment for the Safe Production of Hazardous Chemicals (First Batch)\\" (Emergency Management Department Document [2020] No. 38), thereby promoting the phasing out of a number of such obsolete processes, technologies and equipment. However, in recent years, some typical accidents have occurred successively in enterprises involved in nitration processes and hydrogen peroxide production, resulting in severe casualties and property losses. These incidents have clearly revealed that certain enterprises still suffer from low inherent safety levels, as well as process technologies and equipment facilities with high safety risks. At the same time, with the continuous development and application of new processes, technologies, and equipment in recent years, the industry now has safer, more advanced, and more reliable alternative process technologies or equipment, which creates favorable conditions for further phasing out outdated ones.   A responsible official from the Ministry of Emergency Management said that the introduction of this Catalogue is a powerful tool for improving the inherent safety levels of chemical enterprises. Through mandatory requirements, it encourages enterprises that do not meet safety standards to increase their investment in safety measures, thereby eliminating potential accident risks at the source and addressing issues fundamentally, so as to further prevent and mitigate major safety hazards related to hazardous chemicals. This year marks the beginning of the three-year initiative aimed at addressing the fundamental issues related to the safe production of chemicals and hazardous substances. The formulation and release of the \"Catalog\" is an important measure within this three-year plan. All regions should strengthen coordinated planning and organization, work in tandem with efforts to improve the safety of old chemical processing units and to automate high-risk manufacturing processes, and accelerate the implementation of the tasks outlined in the three-year action plan, so as to ensure high-quality development through a high standard of safety.

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