Analysis and Optimization of Black Water Angle Valve in Coal Gasification Unit
China Petroleum and Chemical Corporation Jiujiang Branch, Jiujiang 332004, China
| Abstract: | In the GE coal water slurry gasification unit, the black water angle valve is an essential key equipment, and its application environment is extremely harsh and harsh: black water flows through the valve body before and after, with a pressure difference of up to 3.1 MPa (G); Black water undergoes instantaneous flash evaporation through the valve core to form a gas-liquid solid three-phase system, with complex components and strong corrosiveness; The speed of black water flowing through the valve core is very high, causing severe erosion and wear on the valve core and internal components; Black water expands and vaporizes at the expansion bell mouth, is obstructed at the bottom of the cylinder, and partially liquefies due to temperature drop, resulting in cavitation and causing significant impact; Black water flash evaporation concentrates the solid content, and solid ash particles directly cause strong flushing of equipment and pipelines. The phase transition and fluid instability generated during the flash evaporation process of black water can cause significant vibration to equipment and pipelines. The black water angle valve plays a crucial role in ensuring the stable operation of the flash evaporation system in coal gasification equipment! The safety and stability of the black water corner valve during operation are crucial, and the flash evaporation process of black water poses great operational risks to equipment and pipelines. This article focuses on several typical problems that occur during the normal production and operation of the coal hydrogen production unit. Through research and analysis of problems such as cylinder perforation, actuator jamming, instrument air duct and valve stem fracture, countermeasures and solutions are proposed. Continuous process optimization and technical improvement are carried out to improve the reliability of the black water angle valve and ensure the efficient and stable operation of the coal gasification unit. |
| Keywords: | Black Water Angle Valve; Valve Core; Valve Stem; Corrosion; Scour; Cylinder Body; Wear and Tear; Fracture; Expand |
| DOI: | 10.57237/j.cse.2024.02.001 |
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Received: 19 November 2023
Accepted: 17 January 2024
Published Online: 13 April 2024
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