The Rebuilding Of DCS In FGD Of Huaneng Luohuang Power Plant

The contamination of atmosphere still give priority to type of coom in our country.the main contaminations is SO2 and soot. The problem of acid rain is still severity, In the fossil power plant, the flue gas desulfurization is the main approach on controlling the let of SO2.The paper mostly introduce the DCS rebuilding project of the desulfurization system in .The equipment is first introduced into our country from Mitsubishi corporation ,which is the wet limestone-gypsum flue gas desulfurization equipment.The main works have been done as follow:(1) After a great deal of literatures are read ,the paper introduces the main ways of the flue gas desulfurization,and the development status of DCS;(2)Through the analysis of the former DCS system in the plant,the desire about the rebuilding of DCS is put; the characteristic of the planning DCS system is introduced;(3) According to the characteristic of the wet limestone-gypsum flue gas desulfurization,the main factor about influencing the efficiency of desulfurization is analyzed;(4)Some tests are done ,which are the reduction and enhancement of the flue gas quantity,and the disturbing test of the starting and stoping the circulation of the serum in the absorbing tower.The paper lists some actual run curves.(5)Through the analysis and the instance of the spot experiment and the actual run,it is proved: through the rebuilding of the DCS system improve the security and reliability,and solve the intimidation without the spare part in the productions the sametime,after reduilding,the response of DCS is more quick which is to the variety of the controls parameter of the system,the time is more short when the system rebuild thebalance.The security and reliability are improved.It is proved through the practice: the project about reduiding is accurate,and reach the prospective aim.