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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.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 co...Learn More
Abstract: Plasticizer is an indispensable component in tires and rubber products, mainly used as a synthetic material for rubber or plastic. When added, it can reduce the glass transition temperature of rubber and enhance its plasticity and flowability. This article uses bibliometric research methods to search for relevant literature on rubber plasticizers in the CNKI database and Web of Science database from 2013 to 2023. VOSviewer quantitative analysis software is used to visually analyze the trend of information changes in keywords, publication volume, high citation frequency, cooperative relationships, and co word clustering in relevant literature over the past decade, and to analyze the research trend in the field of rubber plasticizers in recent years, Summarize and elaborate on the research status and hotspots of rubber plasticizers. The analysis results indicate that the number of publications on rubber plasticizers has increased significantly since 2016, accounting for approximately 83% of the total number of publications during the research period from 2016 to 2023. The hot research fields of rubber plasticizers mainly focus on the development and application of environmentally friendly rubber plasticizers, as well as the study of the impact of rubber plasticizers on the properties of composite materials. With the development of people's lives today, the technological development and application of environmentally friendly plasticizers have become a major research hotspot. There is strong correlation and complementarity between various research hotspots.Abstract: Plasticizer is an indispensable component in tires and rubber products, mainly used as a synthetic material for rubber or plastic. When added, it can reduce the glass transition temperature of rubber and enhance its plasticity and flowability. This article uses bibliometric research methods to search for relevant literature on rubber plasticizers i...Learn More
