Research On The Path Of Pollution And CO₂ Emission Reduction In Electrolytic Manganese Industry Based On Cleaner Production

Electrolytic manganese is an important strategic industry,but it is also a high energy-consuming and high-emission industry.There are many prominent problems in enterprises such as high CO₂emission per unit product,harmful to ecology ecological hazards by manganese residue accumulation and great pressure of end-treatment.In response to the relevant national strategies of“carbon peaking,carbon neutrality”and“nationwide battle to prevent and control pollution”,this dissertation selects typical electrolytic manganese enterprises and industrial clusters to research the path of pollution and CO₂emission reduction based on cleaner production.The first research in this dissertation is the innovation of cleaner production audit mode in electrolytic manganese industry.We follow the traditional approach of cleaner production audit,incorporating greenhouse gas emissions into the audit objectives while ensuring efficiency and simplicity.Finally,this dissertation explores a set of rapid cleaner production audit method suitable for electrolytic manganese industry and enterprise cluster area has been explored.In addition,this dissertation also selected representative enterprises and industrial agglomeration areas for audit practice,which summarized the key points of CO₂and pollutant generation and emission in the whole process of electrolytic manganese production,and also provided ideas for relevant departments to carry out the overall cleaner production audit of the industry.In this dissertation,emission-factor approach is adopted as the enterprise CO₂emission accounting method.We refer to domestic and foreign greenhouse gas emission accounting guidelines,and the characteristics of CO₂production and emission in the production process of enterprises.Finally,we established the CO₂emission accounting model of electrolytic manganese industry.In this part,we selected a large electrolytic manganese enterprise with complete industrial chain as the main research enterprise.We have completed the verification and calculation of CO₂emissions in the whole process of electrolytic manganese production,which is the first time in the electrolytic manganese industry.We found out the energy consumption and CO₂emission of each production step of electrolytic manganese.The results show that the production of 1 ton of electrolytic manganese products causes 6125.48kg of CO₂emissions,including 5243.42 kg of indirect CO₂emissions caused by fuel,electricity and heat consumption,and 882.06 kg of CO₂from the chemical reaction of raw materials.In addition,this dissertation makes an in-depth analysis of the accounting results from various perspectives,such as energy types,production systems and process links,so as to fully tap the potential of the industry in reducing pollution and CO₂,and also provide a theoretical basis for the path planning of"carbon peak and carbon neutrality"for electrolytic manganese enterprises.This dissertation adheres to the concept of source reduction of cleaner production,and takes characteristic pollutants such as combined acid mist,electrolytic manganese slag and CO₂as the object of treatment.From the energy structure,basic production system,auxiliary production system,auxiliary production system,transportation system and carbon capture,recycling and utilization system,a total of six aspects.we have formulated the implementation plan of pollution and CO₂emission reduction for electrolytic manganese industry,including 17 advanced technologies.This dissertation constructs a technology-based marginal emission reduction cost calculation model.And it is calculated in detail that is the marginal emission reduction cost of each technology.After the program achieves full promotion,it can generate economic benefits of 3,366 million yuan and reduce the CO₂emission of manganese electrolysis industry by 7,292,700 tons per year.They can be economically beneficial while achieving carbon reduction.These also expand the analysis of the economic feasibility of the program,and also provides a reference for enterprises to develop“one enterprise one policy”cleaner production pollution and CO₂emission reduction plan according to their own conditions.