Our FGD control technology research and development began in the early 60s, on coal-fired power plants, coal-fired industrial boilers and metallurgical flue gas desulfurization process conducted research, equipment development, to obtain laboratory and field testing of small test results. Since the 80's, launched a series of research, development and industrialization. Former State Science and Technology Commission of the "Plan", and "Eighth Five-Year" key project, an internationally principal means of existing desulfurization technology research and practical engineering plant experiments; the National Science Foundation supported the establishment of task based desulfurization technology research Much has been achieved. At present our country, our development of flue gas desulfurization method, still in the pilot phase of industrialization demonstration. Ministry of Science and in the "Ninth Five-Year" period, the organization "small boiler dust practical desulfurization technology and equipment research and industrialization of" research topics, including technology for coal-fired power plant flue gas desulphurization, flue gas desulfurization using pulse corona plasma new technology; At the same time, the introduction of desulfurization technology projects, demonstration-scale testing and industrial applications to run. Power plant flue gas desulfurization technology in China started in 1961, research institutions and institutions of higher learning have come into force once the research and development conducted in the law, so wet and semi-dry flue gas desulfurization exploration of the state Science and Technology (formerly the State Science and Technology) "Plan" "Eighth Five-Year" and "September 5" special support of desulfurization achieved excellent progress. But our self-developed flue gas desulfurization project, still in small scale, pilot phase. Industrialization and technology industry limited. 1. Rotating spray dry flue gas de sulfurization pilot1983, at the Sichuan Baima power plant is built to handle Smoke 3500Nm3 / h on the basis of small-scale test equipment, in the power plant to 70000Nm3 / h in the test device. After nearly a year to debug and test of 2000 hours continuous operation, using lime as the desulfurization agent to handle high-sulfur coal (sulfur content 3.5%), flue gas, the calcium sulfur ratio of 1.4 when the desulfurization rate of about 80%. After desulfurization absorber spray people with the flue gas SO2 reacts solid ash, solid ash in the tower when the fate of constantly dry, dry and eventually form a solid dust separation in the tower part of the discharge, the other part removed with the flue gas into the electrostatic precipitator. Process include: absorbent preparation, absorbent slurry spray, contact with mixed reaction, droplet evaporation and SO2 absorption and waste discharge. Main equipment: (1) Spray Machine: RN? 10T type, speed 1000r/min, aerosol size 10t / h.(2) absorber: 8m, cylindrical body of high-6m.(3) Electric Dust Proof: Double room double electric field, the effective sectional area of 2 - 15.8m, single-field length 4.5m. (4) Fan: Y4? 73NO18D type, speed 960r / h, capacity 143920m3 / h, pressure 3300Pa.(5) Lime digester: 600 - 4500mm, capacity 3-5t / h.(6) wet ball mill: MXQG1500 type, 1500 - 3000mm, output 2-7t / h (dry material).Key technical issues, high-speed rotating nozzle wear strong influence the formation of aerosol mass scale, slurry pumps for durability. 2. Rotary spray dry flue gas desulfurization Test1987 onwards, the introduction of the Danish company Niro rotary spray dry flue gas desulfurization equipment operation accumulated operating experience in the Beijing rubber Liu Chang 6.5t / h boiler flue gas extraction part of the establishment of processing 2000Nm3 / h flue gas volume An experimental device to carry out pre-trial process. Ca (OH) 2 slurry atomization and mixing of reaction with flue gas desulfur ization equipment people, including drying absorber, high-speed centrifugal spray computers, air distribution device and the end product collector. Drying absorber diameter of 2m, high-5m, high-speed centrifugal spray machine speed is 17000? 27200r/min, slurry flow rate 50kg / h. Ca (0H) 2 is made by the lime in the digestion tank, flue gas inlet temperature 150. Be processed S02 concentration 1000-2000ppm. Adiabatic saturation temperature value of 24.6, Ca S ratio of 1.2? 1.8, 66% off Okinawa string -79%.
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