Application of the hottest ceramic ball valve in f

2022-08-04
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Application of ceramic ball valve in flue gas desulfurization application of ceramic ball valve in flue gas desulfurization:

China is a country whose energy structure is mainly coal-fired. Air pollution belongs to coal smoke pollution, and dust, sulfur dioxide (SO2), nitrogen oxides (NOx) are the main pollutants in China's atmosphere. In electric power, metal smelting, glass and glass fiber, chemical industry and other industries, due to the sulfur and calcium fluoride in coal, heavy oil with high sulfur content and mineral raw materials, the flue gas contains a large amount of sulfur dioxide, HF and other harmful gases, causing serious pollution to the atmosphere, which is an important cause of acid rain. Acid rain and sulfur dioxide pollution cause serious economic losses in crops, forests and human health, which 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 scheme for the division of acid rain control areas and sulfur dioxide pollution control areas formulated by the State Environmental Protection Administration in the form of Guo Han [1998] No. 5 document on january21,1998. Taking power plants as an example, desulfurization facilities must be set up for new and reconstructed power plants with coal sulfur content greater than 1%

flue gas desulfurization is the main measure to control sulfur dioxide emission in coal-fired power plants. At present, the mainstream desulfurization processes in the world include wet process, dry process, semi dry process and ammonia process. Among them, limestone gypsum wet desulfurization process has high desulfurization efficiency, large flue gas processing capacity of a single machine, good adaptability to coal, mature process technology, long stable operation cycle and small impact of load change. Limestone as desulfurization absorbent has a wide range of sources and low price, and the by-product gypsum can be recovered after dehydration, With high comprehensive utilization value, it has become the most widely used, mature and reliable process in the world. The State Power Corporation of China also held a press conference on the special action of "two reductions, six treatments and three improvements" by the Nanjing municipal government on the 21st, and has determined the wet limestone desulfurization process as the leading process for flue gas desulfurization in thermal power plants

however, the circulating flow in the system during the operation of the desulfurization unit is mainly limestone and gypsum slurry and some other impurities, which are both abrasive and corrosive. Especially, when the SO3 content in the flue gas increases, the dust concentration increases and the moisture increases, the corrosion becomes more serious. After the system has been running for a certain period of time, scaling begins to occur in the system, and the scaling blocks are large and hard, And greatly increased the wear and tear of the equipment. The corrosion and wear of equipment has been a long-term problem for desulfurization users, and is also the main factor affecting the operation rate of equipment. Therefore, improving the corrosion and wear resistance of equipment is very important for the safe and stable operation of equipment. In particular, the valve as a fluid control component bears the brunt

advanced ceramic materials have been favored by developed countries since the second world war because of their high hardness, high strength, high wear resistance and good anti-corrosion performance. They competed to invest human and material resources to develop engineering ceramics, which were first used in military and aerospace industries, such as rocket tail nozzle, space shuttle heat shield, armored vehicle, etc. Engineering ceramics is also called structural ceramics without water conversion, which is essentially different from ordinary ceramics. Later, it gradually developed from ceramic engines and ceramic bearings to ceramic watches, ceramic scissors, fruit knives, etc. The development and application of advanced ceramic materials in China were included in the "863" program as early as the late 1970s. Due to the decoupling of research and application, the development of structural ceramics in China began in the early 1990s. Following the international trend, in order to promote the application and development of new materials in China's ceramic industry, Jintai Merrill Lynch has devoted itself to the research and development of high-performance ceramic ball valves with international advanced level. After being used by many large enterprises at home and abroad, the quality has reached the international leading level

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kw series ceramic valves have well solved the two major problems of high corrosion and high solid content wear existing in FGD workers to enhance nutrition, enhance and ensure product efficacy and improve product performance. Due to the high hardness, high strength, high wear resistance and good anti-corrosion performance of advanced ceramic materials, the corrosion resistance, wear erosion resistance and high temperature resistance of the valve can be greatly improved, which greatly extends the service life of the valve, thus prolonging the working cycle, improving the work efficiency and saving the maintenance cost. In the process of regulating limestone slurry and gypsum slurry wastewater, kW ceramic regulating valve is the most ideal valve at present, the best substitute for imported products, and has high promotion value

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