Understand the need for gypsum pressure ball machine jj

 Gypsum wet process is currently the most widely used and most technologically sophisticated FGD technology, accounting for an installed capacity of 70% FGD units. The method is based on limestone desulfurization agent, through the absorbent slurry injected into the absorber, full contact mixed with the flue gas, and flue gas cleaning, making the SO2 in the flue gas and slurry CaCO3 and strong bubbled to air oxidation reaction ton SO2 byproduct gypsum to produce 2.7 tons, a 300,000 KW coal-fired power plants, coal-burning sulfur if 1-2% per year is necessary to discharge gypsum 3-6 tons. 2000 National Thermal Power installed capacity of approximately 220 million KW, the same year in the construction of desulfurization units for a total capacity of 10 million KW. Large-scale thermal power plant desulfurization technology is ripe, in recent years, the state strengthened the control of sulfur dioxide emissions from power plants, the rapid development of coal-fired power plant flue gas desulfurization industry. By the end of 2005, put into flue gas desulfurization unit capacity of 53 million kilowatts, of which the use of wet FGD technology accounted for more than 90%, 2% sulfur content of coal, the average application base Qdw = 20.93Mj / kg (5000Kcal / kg), the annual operating 5000h (210 days), the average annual coal consumption 350g / kwh, the average desulfurization rate of 90%, the annual generation of 760 to 950 million tons. The past two years the state has increased energy saving measures, coal-fired power plants to install desulfurization unit nearly 150 million kilowatts, the FGD gypsum byproduct output of nearly 30 million tons (the amount of phosphorus plaster), so the amount of by-product gypsum is enormous, Gypsum rapid growth, its use has become a serious problem. With the rapid development of China's economic construction, air pollution control has become a prominent issue. Emissions of sulfur dioxide, accounting for about half of the thermal power plant flue gas emissions. Since the beginning of 2000, the state developed a "two control zones of acid rain and sulfur dioxide pollution control" 15 "plan" in the acid rain control zones and sulfur dioxide control area (two control zones), the focus will cut sulfur dioxide emissions control on fire on pollution power plants, has taken a series of measures. "Two control zones" includes four municipalities, four special economic zones and 21 provincial cities, which accounted for 67% of GDP GDP. Plan made it clear that in 2005 the "two control zones" sulfur dioxide emissions decreased by 20% than in 2000; 80% annual average concentration of sulfur dioxide in urban air up to the national ambient air quality standards. State sulfur coal regions, excessive emissions and focus on building the region near the city of a number of large power plants desulfurization project. In addition, according to the information, each producing one ton of phosphate fertilizer, to produce 5-6 tons of phosphogypsum, its chemical properties and gypsum same. China's annual average of 40 million tons of phosphogypsum is discharged, this figure is still an annual increase rate of 15%. At present, China phosphogypsum stack stock has reached 400 million tons. Piles of phosphogypsum not take up a lot of land, and a serious threat to the natural environment. Phosphogypsum "personality" and gypsum similar unusually rich resources of phosphogypsum as industrial solid waste, long pile will cause secondary pollution. How timely and thorough solution to our existing and being elevated "phosphogypsum Mountain", is a major issue of government departments, phosphate fertilizer plant currently facing. Pressure the ball machine http://www.kfyqj.com dryer http://www.88hongganji.com