Power plant emissions of sulfur dioxide are the main way: coal washing, clean coal combustion technology and flue gas desulfurization. Coal washing and coal currently only remove part of inorganic sulfur, organic sulfur in the coal is no economically viable removal techniques. Although clean coal combustion technologies is a mature commercial technology, but stand-alone capacity is not large; and a big investment, high technical requirements, it is difficult in a short time in the country in large scale use. Flue Gas Desulfurizationafter nearly 30 years of development has become a mature and stable technology, flue gas desulfurization equipment for various types of coal-fired power plant in the world has been widely used.
Limestone – gypsum desulfurization efficiency greater than 95%, which is the world’s most widely used FGD technology.
Beneficiation, crushing limestone, grind 200-300 mesh powder;
The limestone powder slurried with water pumped into theas an absorbent in contact with the flue gas sufficiently mixed;
Flue gas sulfur dioxide and calcium carbonate slurry and an oxidation reaction bubbled from the bottom of the tower air. Calcium sulfate, calcium sulfate saturation after a certain, Gypsum crystals form. After exiting the absorber. Gypsum slurry was concentrated, dewatered to a moisture content of less than 10%;
By conveying to the silo to dehydrated gypsum stack, flue gas desulfurization through mist droplet removed, and then after a heat exchanger to heat up the chimney into the atmosphere.
Power plant desulfurization processes need to use our company’s medium-speed T-mill and vertical mill.
The milling machine used in grinding and processing of metallurgy, building fillers, cosmetics, chemicals and other industries.
Widely used in metal and non-metal mines, cement ,construction Sand and metallurgical industries.
At present, a lot of sulfur dioxide in urban air pollution, coal-dominated energy consumption structure is the most important cause of sulfur dioxide pollution. Coal thermal power station is subject of coal consumption, its sulfur dioxide emissions have been close to 50% of the total emissions in the whole society. This feature determines the control of sulfur dioxide emissions from coal burning is the focus of sulfur dioxide pollution control, control of sulfur dioxide emissions from coal-fired thermal power plant to control sulfur dioxide pollution is a major breakthrough. Since 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 plant, took a series of measures. Coal-fired flue gas desulphurization technology is currently the most widely used, the maximum efficiency desulphurization technology. For coal-fired power plants in the future is a considerable period of time, FGD will be the primary method for controlling SO2 emissions. At present, domestic and international trends FGD technology are: high desulfurization efficiency, large capacity, advanced technology, investment, small footprint, low operating costs, high degree of automation, reliability, etc.
The main use of desulphurization
Limestone – gypsum (wet FGD) Process characteristics: Limestone – gypsum can be commercialized broadly develop and enrich its absorbent resources, low cost, waste gypsum can be recycled as a commodity. Since the absorbent slurry within absorption tower circulating pump through repeated cycles in contact with the flue gas, high absorbent utilization, relatively low calcium sulfur, desulfurization efficiency greater than 95%.
Furnace Sorbent Injection tail humidifier flue gas desulfurization (LIFAC) Process characteristics: coal-fired boiler in the appropriate temperature zone injection of limestone powder and the boiler air preheater additional activation reactor for removal of flue gas SO2. Less its technology investment, small fool space and no wastewater discharge can help transform the old power plant. Circulating fluidized bed flue gas desulfurization (dry FGD) Process characteristics: circulating fluidized bed flue gas desulfurization process prepared by the partial absorbent, absorption, desulfurization ash recycling, dust and control systems and other components. The process is generally dry state of slaked lime powder as an absorbent, but also using other reactive sulfur dioxide absorption capacity of the dry powder or slurry as the absorbent.
Mainly used materials