The application of graphite heat exchangers in coal chemical industry
Thread Content
Graphite heat exchangers are primarily used in coal chemical industries for cooling high-temperature gas and waste heat recovery, with a waste heat recovery efficiency of over 85%. Cooling of high-temperature gas: In coal chemical gasification furnaces, the high-temperature syngas produced (reaching up to 1350°C) needs to be cooled rapidly to ensure the safe operation of subsequent equipment. Thanks to its excellent thermal stability and corrosion resistance, the graphite heat exchanger can efficiently cool high-temperature gas, while preventing equipment damage caused by corrosive substances such as chloride ions and sulfides. Heat recovery from chemical reactions: In processes such as catalytic cracking and ammonia synthesis, graphite heat exchangers are used to recover the high-temperature heat generated during these reactions, thereby preheating the feed oil or adjusting the reaction temperature. This helps to reduce energy consumption by 15%-20% and increase the reaction conversion rate by 8%. Advantages of corrosion resistance and long service life: Coal chemical processing environments often contain highly corrosive substances such as hydrofluoric acid and concentrated sulfuric acid, which can cause traditional metal heat exchangers to corrode and leak. Graphite is chemically inert to most acids except for strongly oxidizing acids, with an annual corrosion rate of
Graphite heat exchangers are primarily used in coal chemical industries for cooling high-temperature gas and recovering heat from chemical reactions, with a waste heat recovery efficiency of over 85%. It takes advantage of the excellent thermal stability and corrosion resistance of graphite material to operate stably in environments containing corrosive agents such as chloride ions and sulfides, thereby preventing corrosion and damage to the equipment. At the same time, it can also recover the heat of reaction to preheat the raw materials or regulate the reaction temperature, thereby reducing energy consumption by 15%-20% and increasing the reaction conversion rate by about 8%. Compared to metal heat exchangers, graphite exhibits better corrosion resistance to highly corrosive substances such as hydrofluoric acid and concentrated sulfuric acid, as well as a longer service life. .