Knowledge Institute: Ceramic ball valve in the flue gas desulfurization applications
Organic Peroxide,Organic Hydrogen Peroxide,Organic Compound,Strong Oxidant Jiangsu Zhongluman New Material Technology Co., Ltd , https://www.zlmchemical.com
China is a country whose energy structure is mainly coal-fired. Its air pollution is soot-type pollution, dust, sulfur dioxide (SO2) and nitrogen oxide (NOX), which are the main pollutants in the atmosphere of our country. In power, metal smelting, glass and fiberglass, chemical industry, due to coal, high sulfur content of heavy oil and mineral raw materials itself containing sulfur, calcium fluoride, etc., the flue gas contains a lot of sulfur dioxide, HF and other harmful gases , Causing serious pollution to the atmosphere, is an important cause of acid rain. Acid rain and sulfur dioxide pollution caused serious economic losses in crops, forests and human health, has become an important factor restricting China's economic and social development. In order to curb the further development of pollution, the State Council approved the "Plan for Controlling Acid Rain Control Area and Sulfur Dioxide Contamination Control Zone" formulated by the State Environmental Protection Administration on January 21, 1998 with the letter No. [1998] Take a power plant as an example. For a newly built or rebuilt power plant with a sulfur content of more than 1% in coal burning, desulfurization facilities must be set up. Flue gas desulfurization is the main measure to control sulfur dioxide emissions from coal-fired power plants. At present, there are several main types of mainstream desulfurization processes in the world, such as wet process, dry process, semi-dry process and ammonia process. Among them, the limestone-gypsum wet desulfurization process has the advantages of high desulfurization efficiency, large unit flue gas treatment capacity, Good quality, mature technology, long stable operation period, little impact on load change, limestone as a desulfurization absorbent, its source is wide and the price is low, the by-product gypsum can be recovered after dehydration and has high comprehensive utilization value and the like At present, all countries in the world apply the most mature and most reliable technology. China's national power company has also identified the wet limestone desulfurization process as the dominant flue gas desulfurization process. However, due to the circulating limestone and gypsum slurry and other impurities in the system during the operation of the desulfurization device, these fluids are both abrasive and corrosive, especially when the SO3 content in the flue gas is increased and the dust concentration is increased And the moisture increases, the corrosion is more serious: After the system runs for a certain period of time, the system begins to foul, spalling particles of large scale and high hardness, but also greatly increased the wear and tear of the equipment. Equipment corrosion and wear problems have long plagued desulfurization users, but also affect the equipment put into operation rate of the main factors, therefore, improve equipment corrosion resistance, wear resistance of the equipment is safe and stable operation is extremely important. Especially as a fluid control valve parts is the first to bear. Advanced ceramic materials with its own high hardness, high strength, high wear resistance and good corrosion resistance, since the Second World War has been favored by the developed countries, they are competing to invest manpower and resources, research and development of engineering ceramics , The earliest used in military and aerospace industries, such as the rocket nozzle, aerospace insulation panels, armored vehicles and so on. Engineering ceramics, also known as structural ceramics, she has the essential difference between ordinary ceramics. Later gradual development, from the ceramic engine, ceramic bearings to ceramic watches, ceramic scissors, fruit knives and so on. As early as the late seventies, the development and application of advanced ceramic materials in China was included in the "863" plan of our country. Since the research was decoupled from application, the development of structural ceramics in our country started in the early 1990s. Jintai Merrill Lynch follows closely the international trend. In order to promote the application and development of new ceramic materials in China, we devote ourselves to the research and development of world-class high performance ceramic ball valves, which have been used by many large enterprises both at home and abroad and the quality has reached the international advanced level. KW series ceramic valve well solve the FGD conditions exist high corrosion, high solid content wear two major issues. As the advanced ceramic material itself has high hardness, high strength, high wear resistance and good corrosion resistance, can greatly improve the corrosion resistance of the valve, abrasion erosion, and high temperature performance, greatly extending the service life of the valve, Thus prolonging the work cycle, improving working efficiency and saving the maintenance cost. In the limestone slurry, gypsum slurry wastewater regulation process, KW ceramic valve is the most ideal valve, is the best substitute for imported products, with a high promotional value. KW series of ceramic ball valve is the use of structural ceramics, high corrosion resistance and high wear-resistant characteristics, the use of advanced design structure in Germany, independently developed high-tech products, in accordance with GB, DIN, JIS, API and other standards of manufacture, with Super anti-corrosion, wear resistance, is the ideal substitute for imports of high-end valves, has been widely used in desulfurization system, was unanimously praised. Product Features: ★, all parts in contact with the medium are structural ceramic materials, its chemical stability and high hardness (Rockwell hardness HRC90), second only to diamond. Therefore, the valve has high wear resistance, corrosion resistance, erosion resistance, and good insulation, thermal expansion. ★, the ball using advanced grinding equipment and technology manufacturing, high ball roundness accuracy, good surface quality, with the seat on the research, the use of Zr02 ceramic self-lubrication, can obtain good sealing performance. ★, completely changed the metal seal valve easy to leak, torque, sealing surface corrosion resistance shortcomings. ★, ceramic good wear resistance, so that this valve is durable, high reliability. Long life, is 2-4 times the titanium alloy valve and Monel valve. ★, for high hardness of the granular media, or soft particles but corrosive medium, the valve has an absolute unparalleled advantage, is currently the only suitable medium for such valves. ★, can directly receive 4-20mA or 1-5V signal, the valve easy to adjust the ratio (position adjustment), a good control module to ensure long-term and stable use.