【作者】 杨军；

【导师】 卢啸风； 王裕明；

【作者基本信息】 重庆大学 ， 动力工程， 2006， 硕士

【摘要】 龙桥电厂2×130T/h循环流化床锅炉于2002年建成投产,与之配套的两台YSC88-3型静电除尘器由浙江天洁环保设备有限公司设计、制造、安装。投运3年以来,一直除尘效率不高,所排放烟气呈较浓的褐红色,粉尘排放严重超标,环保压力越来越大。本文从国内外静电除尘器的发展和应用现状入手,较为系统地分析了国内燃煤电厂静电除尘器存在的主要问题。这主要表现在:静电除尘器的运行问题(包括运行电流偏低、运行电压偏低、放电极线断线、反电晕、卸灰和输灰系统堵灰等问题)、振打问题以及气流分配问题等。同时,针对这些问题提出了较为可行的对策。另外,本文结合龙桥电厂静电除尘器工程实例,通过理论研究和测试分析提出了针对龙桥电厂除尘效率低下问题的解决方案。在此基础上于2006年对原除尘器进行技术改造,除尘效率由原98.84%提高到99.55%,基本达到了预期目标。作为老机组改造比较成功的范例,龙桥电厂此次的改造工作对其他火电厂静电除尘器的技术改造以及静电除尘器的进一步应用研究有一定的借鉴意义。更多还原

【Abstract】 The 2×130T/h circulating fluidized bed (CFB) boiler of Chongqing Longqiao power plant were put into operation in 2002. And the two suits of YSC88-3 type electrostatic precipitators (EP) were designed, manufactured and installed by Zhejiang Tianjie Environment Protection Limited Company. During the three years, the dust removing efficiency of the EP is not higher enough for the request of the environment protection.This article analyses the mail problems of the electrostatic precipitators in domestic coal-burning power plant based on reviewing the progress of EP in the world. And the problems mainly includes operation problems (such as lower operational current, lower operational voltage, discharge electrode break off, un-electrical-dizzy, and the ash blocking up of ash transporting equipments), striking problems, gag flow distribution problems, etc. In addition, some feasible methods are put forward for solving above problems.What’s more, considering with the case of the Chongqing Longqiao power plant, we gain the settling scheme on solving the ash removing problem of the electrostatic precipitators after our study and test. And we carried out the technical modification on the electrostatic precipitators in 2006. After the performance examination, the modified electrostatic precipitators were accepted. The ash removing efficiency increases from 98.84% to 99.55%, and the dust emission meets the limit of the environment protection.This study is a successful example for the modificatiion of the other old electrostatic precipitators in coal-burning power plant, and the experience may provide a reference for the operation, modificatiion and furthermore study of the electrostatic precipitators.更多还原