Optimum Design And Performance Test Of Flue-gas Desulphurization In Guiyang Thermal Power Plant

Nowadays,It's the urgent needs for sustainable development in society and economy to control the emission of sulphur dioxide.However,Controlling the emission of sulphur dioxide in power plate in the focus of the work.The flue gas desulphurization (FGD) of wet limestone-gypsum is the most widely used FGD method in the world.The initial investment,operation and maintenance costs are very high while system availability rate is low.It cumbered the application of the flue gas desulphurization (FGD)in power plate.So,It has important meaning to promote China's thermal power plant flue gas desulfurization process with the proper FGD technology,optimized system,proper equipment.This research can make reference to optimized designed and operation to other flue gas desulphurization system of boiler set.This paper focus on the flue gas desulphurization rebuilding project of 2×200MW boiler in Guiyang power plate.The domestic and overseas desulphurization technologies were studied.The wet limestone-gypsum technology was token to complete the optimized design and construction basing the basic fundamental,structure and instance in Guiyang power plate.And also the type of the equipments is chosen.The detailed testing and trial operation on new desulphurization system were done.The data of operation was analyzed.The suggestions for the system operating safely and economically were token.The conclusions gained were as follows:â‘ The absorbing tower is spray tower type without padding floor,so it can prevent the inner parts of the tower scaling.The optimized structure was divided into demist zone in the top,spray zone in the middle,spray zone in the bottom.The diameter is 12.49m and the height is 28.36m.The flue gas gets into the absorbing tower through the bottom of spray floor.Then it flowes upwards with the speed of 4m/s and meets the misty serosity spurt ed by three circulating spray floor.The SO₂ in the flue gas was absorbed.This process ensure the desulphurization rate more than 95%.â‘¡The study shows that desulfurization efficiency of 8^th and 9^th FGD system is 98.3%,98.1% under the flux of SO₂ is 6412kg/h.Under this condition,the HC1 removal rate is 94.06%,96.15% while HF removal rate is 89.30%,91.16%.The desulfurization efficiency of 8^th and 9^th FGD system is 96.4%,94.1 % under the flux of SO₂ is 8656kg/h.â‘¢The coal,load,volume of smoke,flue gas temperature,dust concentration, absorbent quality are constantly changing,so the adjustment and optimization should be carried on according to idiographic condition.Finally,the FGD system runs in the best condition.The utilization and security can be prompted.Also the cost of the operation be reduced.â‘£The furnace vacuum should be closely monitored in the whole process of start-up and pause at any time to adjust the preparations,making sure that the furnace vacuum in the normal range of operation.