In coal gasification, technical problems that need to be solved during the localization process of imported valves

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introduction: Coal chemical and coal-to-liquid projects must first carry out coal gasification. The conditions of the slagging system of the coal gasification device are very harsh, and the requirements for valves are very strict. The valves are required to have high wear resistance, erosion resistance, anti-scaling, anti-scarring, and quick cut-off functions. Especially the slag lock valve has high pressure, high temperature, very high medium (slag) hardness, frequent opening and closing, fast opening and closing speed, good sealing performance, and high reliability. Problems existing in special valve research include: Slag locking valve: Quick cut ； Anti-scarring, anti-scaling and other difficult problems oxygen and hydrogen valves: The material meets the requirements of high-pressure hydrogen sulfide corrosion and hydrogen embrittlement conditions and strictly controls the carbon, sulfur and phosphorus content. ； Cleaning requirements, etc.