Ceramic valve is the most ideal valve for flue gas desulfurization

my country is a country whose energy structure is mainly coal-fired. Air pollution belongs to coal smoke pollution. Dust, sulfur dioxide (SO2), and nitrogen oxides (NOX) are the main pollutants in my country's atmosphere. In the power, metal smelting, glass and glass fiber, chemical and other industries, due to the sulfur and calcium fluoride contained in coal, heavy oil with high sulfur content and mineral raw materials, flue gas contains a large amount of harmful gases such as sulfur dioxide and HF, which cause serious pollution to the atmosphere and are an important cause of acid rain. Acid rain and sulfur dioxide pollution cause serious economic losses to crops, forests and human health, and have become an important factor restricting my country's economic and social development. In order to curb the further development of pollution, on January 21, 1998, the State Council approved the "Acid Rain Control Area and Sulfur Dioxide Pollution Control Area Division Plan" formulated by the State Environmental Protection Administration in Document No. [1998] 5. Taking power plants as an example, new and rebuilt power plants with coal sulfur content greater than 1% must be equipped with desulfurization facilities.
Flue gas desulfurization is the main measure for controlling sulfur dioxide emissions in coal-fired power plants today. At present, the mainstream desulfurization processes in the world include wet, dry, semi-dry and ammonia methods. Among them, the limestone-gypsum wet desulfurization process has the characteristics of high desulfurization efficiency, large flue gas treatment capacity per unit, good adaptability to coal types, mature process technology, long stable operation cycle, small impact of load changes, and limestone as a desulfurization absorbent has a wide source and low price, and the by-product gypsum can be recovered after dehydration, which has a high comprehensive utilization value. my country's State Power Corporation has also identified the wet limestone desulfurization process as the leading process for flue gas desulfurization in thermal power plants.
However, since the main circulating fluids in the system during the operation of the desulfurization device are limestone and gypsum slurry and some other impurities, and these fluids are both abrasive and corrosive, especially when the SO3 content in the flue gas increases, the dust concentration increases, and the water content increases, the corrosion is more serious: after the system has been running for a certain period of time, scaling begins to appear in the system, and the scale blocks that are peeled off are large in particles and high in hardness, which greatly increases the wear of the equipment. The corrosion and wear of equipment has long plagued desulfurization users and is also the main factor affecting the commissioning rate of equipment. Therefore, improving the corrosion resistance and wear resistance of equipment is extremely important for the safe and stable operation of equipment. In particular, valves as fluid control components are the first to bear the brunt.
Advanced ceramic materials have been favored by developed countries since World War II for their high hardness, high strength, high wear resistance and good corrosion resistance. They have invested manpower and material resources to develop engineering ceramic valves, which have been used in military and aerospace industries for a long time, such as rocket tail nozzles, space shuttle insulation panels, armored vehicles, etc. Engineering ceramic valves are also called structural ceramic valves, which are essentially different from ordinary ceramic valves. Later, they gradually developed from ceramic engines, ceramic bearings to ceramic watches, ceramic scissors, fruit knives, etc. The development and application of advanced ceramic materials in my country were included in my country's "863" plan as early as the late 1970s. Due to the decoupling of research and application, the development of structural ceramics in my country only began in the early 1990s. Henan Tianzong Industrial Co., Ltd. keeps up with the international trend and devotes itself to the research and development of high-performance ceramic ball valves with international advanced level in order to promote the application and development of new materials in my country's ceramic industry. It has been used by many large enterprises at home and abroad and its quality has reached the international leading level.