随着国家经济的发展，在电力生产中带来的环境污染也越来越严重。国家环保已 经严格限制 NOx 在火电厂烟气排放中的排放标准，并在环保政策、计划电量、电力市 场交易规则、脱硝电价补偿方面给予现役燃煤火电机组脱硝改造支持和政策调控方面 的控制。 因此推广国内烟气脱硝设备的技术运用是非常必要的。华能九台电厂计划对 现在运行的 2 X 660 MW 发电机组进行脱硝改造以符合国家标准的要求。 本文首先分析了国内外脱硝技术发展的背景，并介绍了脱硝技术在燃煤火电机组 上的实际实施情况以及在役燃煤火电机组脱硝改造情况，火电企业脱硝技术的实际运 行情况，九台电厂现有基础条件。本文对九台电厂脱硝改造技术方案的选择进行了分 析设计，包括对脱硝改造的风险、设备及材料的选择和安装工艺、改造后对现有设备 性能的影响等进行了分析，对九台电厂脱硝改造对环境的影响进行了分析，包括对改 造后可能对周边环境带来的空气污染、噪声污染等的控制和效果，以及改造工程带来 的环境效益。对九台电厂脱硝改造的社会影响进行了分析，包括可能造成的群众纠纷 以及社会效益等分析，对电厂脱硝改造的经济效益进行了分析，包括脱硝改造工程的 成本、运行成本以及日后收益的预估等。在上述分析中，采用了电厂大量的试验数据 以及日常运行数据，并对国内外现有技术进行了研究，对设备及原材料市场进行市场 调查，查阅相关技术规范及标准并结合国家和吉林省有关部门的相关法律、法规、制 度及政策，对项目进行了较为客观全面的分析，通过对九台电厂脱硝改造项目的技术 可行性分析，经济效益分析，环境效益及社会效益分析，可以得出华能九台电厂 2 X 660MW 火电机组脱硝改造项目是可行的。 关键词 脱硝 改造 可行性研究 九台电厂III Study on the feasibility of De-NO x reconstruction project of Huaneng jiutai power plant Abstract With the development of our national economy,in power production in bring the pollution of the environment is more and more serious. NOx discharge is now serious imposed on in accordance with the flue-gas dischargestandard of fossil power plant published by the state because of its detriment with Nox to the environment.,and in environmental policy,plan of electricity, electricity market rules, denitration price compensation to existing coal-fired generator set denitration reconstruction positive support and policy regulation control Therefore,the applicatim of the denitration technology should be strongly extended。Huaneng jiutai power plant is planning for active duty 2 X 660MW coal-fired electric group perform denitration renovation to comfirm with national standard. This article has first analyzed the domestic and foreign De-NOx technology development background, and introduces the denitration technology in coal-fired power plant on the actual implementation of the existing coal-fired power plant denitration renovation, denitration technology in actual operation, the existing Jiutai power plant infrastructure, In this paper, the Jiutai power plant denitration technology reform scheme is analyzed and designed，Including Analysis of the risk of denitration transformation, the choice of equipment and materials and installation process, after transforming effect the performance of the existing equipment and so on ，The Jiutai power plant denitration transformation's impact on the environment is analyzed，Including the denitration may bring in the surrounding environment such as air pollution, noise pollution, and the environmental benefits of denitration。the social impact of The Jiutai power plant Denitration is analyzed, Including may cause disputes and social benefit analysis , The economic benefits of denitration transformation are analyzed, Including the denitration project cost, operation cost and future earnings forecasts, etc. In the above analysis, Using the power plan a lot of testingIV data and daily operation data and research on the existing technology at home and abroad,market for equipment and raw materials market investigation, and consult the relevant technical specifications and standards According to the state and jilin province department of the relevant laws, regulations, system and policy, the more objective and comprehensive analysis was carried out on the project denitration. Based on the Jiutai power plant denitration reconstruction project of technical analysis, financial benefit analysis, environment benefit analysis and social benefit analysis, it can be Huaneng jiutai power plant 2X660MW thermal power unit denitration renovation project is feasible. . Keywords: Denitration, reconstruction,Feasibility study,Jiutai power plant.I 目 录 第 1 章 绪论......................................................................................................1 1.1 项目研究背景.......................................................................................1 1.2 项目研究意义及必要性.......................................................................2 1.3 项目研究内容与研究方法.....................................................................3 1.3.1 主要研究内容..............................................................................3 1.3.2 研究方法......................................................................................4 1.4 华能九台电厂概述...............................................................................5 第 2 章 华能九台电厂脱硝技术方案选择 .....................................................7 2.1 脱硝的涵义及氮氧化物生成机理 ......................................................7 2.1.1 脱硝的涵义..................................................................................7 2.1.2 氮氧化物生成机理......................................................................8 2.2 四种脱硝技术方案评价.......................................................................9 2.2.1 低氧燃烧技术方案评价............................................................10 2.2.2 SCNR 脱硝技术方案评价 ........................................................10 2.2.3 烟气脱硝 SCR 技术方案评价 ..................................................12 2.2.4 SNCR/SCR 混合烟气脱硝技术评价 .......................................13 2.3 华能九台电厂脱硝技术路线选择 ....................................................13 2.3.1 主要设备现状分析....................................................................14 2.3.2 脱硝技术方案选择原则............................................................14 2.3.3 九台电厂脱硝技术选择的限制条件 .......................................15 2.3.4 九台电厂脱硝技术方案选择 ...................................................17 第 3 章 华能九台电厂脱硝改造项目方案 ...................................................19 3.1 设计参数与性能要求及脱硝工程总体布置 ....................................19II 3.1.1 设计参数与性能要求 ...............................................................19 3.1.2 脱硝工程总体布置 ...................................................................20 3.2 脱硝改造方案内容 ............................................................................22 3.2.1 催化剂、反应器系统的设计及其安装方案 ...........................22 3.2.2 氨喷射混合系统及电气系统设计 ...........................................27 3.2.3 还原剂选择及其公用系统设计 ...............................................29 3.2.4 控制系统及在线监测系统设计方案 .......................................32 3.2.5 基础与钢结构设计方案及改造工程基础条件分析 ...............34 第 4 章 改造项目对电厂辅助设备及环境影响分析...................................36 4.1 改造项目对电厂辅助设备的影响 ....................................................36 4.1.1 对空预器、静电除尘器的影响 ...............................................36 4.1.2 对湿法脱硫 FGD 及引风机的影响 .........................................37 4.2 脱硝改造对环境的影响 ....................................................................38 4.2.1 NOx 排放控制效果...................................................................38 4.2.2 氨逃逸控制效果 .......................................................................38 4.2.3 脱硝废水处理方法及效果 .......................................................40 4.2.4 废弃催化剂处理方法 ...............................................................40 4.2.5 脱硝粉尘、噪声控制 ...............................................................41 第 5 章 华能九台电厂脱硝改造项目的效益分析 .......................................42 5.1 经济效益分析.......................................................................................42 5.1.1 建设规模....................................................................................42 5.1.2 资金来源....................................................................................42 5.1.3 投资估算计列范围 ...................................................................43 5.1.4 投资估算结果............................................................................43 5.1.5 经济效益分析编制原则 ...........................................................44III 5.1.6 经济效益分析基础数据............................................................44 5.1.7 经营成本分析............................................................................45 5.1.8 经营收入分析............................................................................46 5.2 社会效益分析.....................................................................................47 结论....................................................................................................................48