广东电力2016，Vol.29Issue(9)：7-12,62,7.DOI:10.3969/j.issn.1007-290X.2016.09.002
增设零号高压加热器控制SCR脱硝烟温对机组经济性影响的计算研究
Calculation Analysis on Influence on Economy of the Unit by Additional No.0 High Pressure Heater Controlling SCR Denitration Flue Gas Temperature
摘要
Abstract
It is able to improve entrance flue gas temperature of selective catalytic reduction (SCR)denitration reactor under low and medium load by adding No.0 high pressure heater. In order to determine its influencing law on unit economy,this paper takes one domestic 600 MW unit for a research object and firstly confirms running parameters of the No.0 high pres-sure heater respectively under 50%,60% and 70% rated load,and then calculates thermal performance and cost changes under different working conditions. Results indicate that after adding No.0 high pressure heater,temperature of feeding water improves exhaust gas temperature which may increase SCR denitration efficiency and reduce cost,but increase fire coal cost for unit operation at the same time. In addition,compared with wide open condition of the extraction valve,economy of the mode of steam extraction and energy conservation is reduced. Thus,it is needed for coupling low temperature economizer to reduce exhaust gas temperature so as to eliminate negative influence of additional No.0 high pressure heater on unit economy.关键词
零号高压加热器/选择性催化还原法(SCR)/锅炉效率/汽轮机效率/循环热效率/机组经济性Key words
No.0 high pressure heater/selective catalytic reduction (SCR)/boiler efficiency/steam turbine efficiency/cir-culating heat efficiency/unit economy分类
能源科技引用本文复制引用
余岳溪,廖永进,范军辉,赵航..增设零号高压加热器控制SCR脱硝烟温对机组经济性影响的计算研究[J].广东电力,2016,29(9):7-12,62,7.基金项目
中国南方电网有限责任公司科技项目(K-GD2014-173) （K-GD2014-173）
