.300 Mw Circulating Fluidized Bed Unit Control Technology Applied Research

The Circulating fluidized bed (CFB) technology as one kind of clean coal burning technology,and can be optimize the electric power industrial structure, to reduce the pollutant discharge,so it has the important meaning to receive the country to take seriously. In the last few years, the CFB boiler to use in coal power plant step to speed up unceasingly, the unit large scale is imperative. The 300MW rank CFB boiler unit is the biggest capacity CFB unit in the present world, the first unit by the French ALSTOM corporate design and manufacture, installs in the Chinese Sichuan Baima power plant. The Kaiyuan power plant first phase mstalls two 300MW CFB coal-burning power set, is the 300MW CFB boiler introduction technology and the equipment manufacture domestically first project. The first manufacture domestically 300MW CFB unit Kaiyuan power plant No.1 unit, is also the world second production similar unit, in the construction with the Baima power plant's time synchronization, does not have the mature experience to supply the reference basically, therefore has conducted the massive research and test in unit's control application, and we have made some progresses. The main key technologies and the innovation spot manifest in the following several points:(1) We have applied the advanced version DEB coordination control strategy in the 300MW CFB unit, it can overcome the big delay in combustion adjustment, and it realizes the wide range load change in slippery press mode, and controls stably in AGC mode. Namely satisfies dispatches the AGC request, also guarantees the unit the steady in automatic mode.(2) We use the new design, the defined, consummate assignment control algorithm in 300MW CFB boiler First time, it realizes successfully application in this kind of unit automatic control system.(3) We use adjustment of cascade on the primary wind and bed press, it controls effectively the deviation between both sides of main bed press, it has solved the difficult problem of the balance between double main bed's material in 300MW CFB boiler. (4) The control logic of sequence control system (SCS) and the boiler safe supervisory system (FSSS) have carried on the optimization design, and we cause the actual logic to be quite perfect in the application, to be reasonable and succinct.The research results in have on to promote the application included first manufacture domestically 300MW CFB in Yunnan province 6 similar units, obtains the good results. The research results reside in the domestic advanced standard in the large capacity CFB boiler control technology aspect, has the promoted value.