电站锅炉送风机室内吸风设计及经济性分析
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摘要
锅炉送风机采用室内吸风能提高锅炉效率,具有一定的经济利益。在某660 MW机组锅炉室内室外双吸风设计的基础上,对吸风方案的系统和布置进行说明,同时对室内吸风进行技术经济计算分析。室内吸风可提高二次风温度,增加了锅炉输入热量,同时也提高了锅炉排烟温度,增大了锅炉排烟损失。根据理论计算,两者相抵节约了锅炉的煤耗。送风机室内吸风布置与常规就地吸风布置相比,增加了投资费用,也增加了送风机和引风机的运行电耗。通过对投资成本、运行成本以及节煤费用的分析计算,得出了紧身封闭锅炉室内吸风布置的投资回收期,为紧身封闭锅炉送风机吸风方案选择提供设计依据。
Indoor suction can improve boiler efficiency and has certain economic benefits. Based on the design of indoor and outdoor double suction in a 660 MW unit, the system and layout of the suction scheme are described, and the technical and economic analysis of the indoor suction is carried out. The secondary air temperature can be increased when suction from inside of the boiler, and the heat input of the boiler can be increased, at the same time, the exhaust gas temperature and loss of the boiler is increased. According to the theoretical calculation, the coal consumption of the boiler is saved. Compared with the conventional local suction arrangement, the indoor suction arrangement of the forced draft fan increases the investment cost and the operation power consumption of the forced draft fan and the induced draft fan. Through the analysis and calculation of investment cost, operation cost and coal saving cost, the investment payback period of indoor air suction arrangement for closed boiler is obtained, which will provide design basis for the selection of air suction scheme of closed boiler.
Indoor suction can improve boiler efficiency and has certain economic benefits. Based on the design of indoor and outdoor double suction in a 660 MW unit, the system and layout of the suction scheme are described, and the technical and economic analysis of the indoor suction is carried out. The secondary air temperature can be increased when suction from inside of the boiler, and the heat input of the boiler can be increased, at the same time, the exhaust gas temperature and loss of the boiler is increased. According to the theoretical calculation, the coal consumption of the boiler is saved. Compared with the conventional local suction arrangement, the indoor suction arrangement of the forced draft fan increases the investment cost and the operation power consumption of the forced draft fan and the induced draft fan. Through the analysis and calculation of investment cost, operation cost and coal saving cost, the investment payback period of indoor air suction arrangement for closed boiler is obtained, which will provide design basis for the selection of air suction scheme of closed boiler.
引文
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[4]DL/T5240-2010,火力发电厂燃烧系统设计计算技术规程[S].
[2]李刚.严寒地区火力发电厂主厂房通风[J].通风除尘,1996(4):9-15.
[3]李慢忆.严寒地区火电厂主厂房采暖热负荷计算[J].电力建设,1996(7):24-26.
[4]DL/T5240-2010,火力发电厂燃烧系统设计计算技术规程[S].