某城市垃圾焚烧处置项目烟气净化系统设计研究

发布时间：2019-01-10 08:55

【摘要】：垃圾焚烧发电技术可以实现垃圾的减量化、资源化目标,其在我国正快速的发展。然而,垃圾焚烧发电存在着污染空气的隐患,烟气净化系统就成为此类项目中最为重要的部分。本文依托杭州某在建垃圾焚烧发电项目,理论联系实际地对烟气净化系统进行了研究。在分析对比各部件详细工作原理的基础上,通过工程和设计计算,完成了该项目烟气净化系统中主要设备的设计工作。本文首先对此套设计中的SNCR(非选择性催化还原)、半干法、布袋除尘、SCR(选择性催化还原)、GGH(烟气-烟气加热)系统工作原理以及工艺流程进行了分析；接着对干法脱酸、半干法脱酸以及湿法脱酸的烟气流量进行计算；最后通过分析、计算的结果以及工程实际需求,设计并绘制了干法脱酸总图、半干法反应塔外形图、活性炭喷射系统平面布置图、除尘器结构图、SCR装置平面图以及湿法脱酸塔布置图。在对整套烟气净化系统研究的基础上,通过对比计算发现,本套烟气净化系统可以将烟气中的SOx、NOx、HF、HCL以及二VA英等有害物质分别降低到50mg/Nm3、75mg/Nm3、1mg/Nm3、10mg/Nm3以及0.08ng-TEQ/Nm3,排放的污染物含量满足《DIRECTIVE 2000/76/EC OF EUROPEAN PARLIAMENT AND OF THE COUNCIL》(后文简称《欧盟2000》标准,且在NOx以及二嗯英的排放控制上超越了该标准。本人参与设计研究的垃圾焚烧发电烟气净化工艺流程,是目前国内最先进的系统,对中国城市垃圾焚烧发电处置工程的推广和发展有着重要的示范意义。
[Abstract]:MSW incineration power generation technology can realize the goal of waste reduction and reuse, and it is developing rapidly in China. However, waste incineration power generation has the potential to pollute the air, flue gas purification system becomes the most important part of such projects. Based on a project of incineration power generation in Hangzhou, the flue gas purification system is studied theoretically and practically. On the basis of analyzing and comparing the detailed working principles of each component, the design work of the main equipment in the flue gas purification system of the project is completed through engineering and design calculation. In this paper, the working principle and technological process of SNCR (non-selective catalytic reduction), semi-dry process, SCR (selective catalytic reduction of), GGH (flue gas and flue gas heating system in this design are analyzed. Then the flue gas flow rate of dry, semi-dry and wet deacidification is calculated. Finally, through analysis, calculation results and practical engineering requirements, the general plan of dry acid removal, the outline diagram of semi-dry reaction tower, the plane layout diagram of activated carbon injection system and the structure diagram of dust collector are designed and drawn. SCR plant plan and wet deacidification tower layout. On the basis of the study of the whole flue gas purification system, it is found by comparison and calculation that the SOx,NOx,HF, in the flue gas can be removed by this system. The harmful substances such as HCL and 2 VA UK were reduced to 50 mg / Nm3G / Nm3X 10 mg / Nm3 and 0.08 ng-TEQ / Nm3, respectively. The pollutant content discharged was up to < DIRECTIVE 2000/76/EC OF EUROPEAN PARLIAMENT AND OF THE COUNCIL > (hereinafter referred to as < EU 2000 > standard). And in the NOx and the emission control of the UK exceeded this standard. The waste incineration power generation flue gas purification process which I participated in the design and research is the most advanced system in China at present. It has important demonstration significance for the promotion and development of the municipal solid waste incineration power generation disposal project in China.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X701;X705

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