Introduction of ethylene cracking furnaces
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Ethylene cracking furnaces are used to process cracked gas, and there are double radiation chambers, single radiation chambers and millisecond furnaces.
Ethylene cracking furnace is the core equipment of the ethylene production plant, the main function is to convert various raw materials such as natural gas, refinery gas, crude oil and naphtha
The material is processed into cracked gas and supplied to other ethylene plants for final processing into ethylene, propylene and various by-products.
The production capacity and technical level of the ethylene cracking furnace directly determine the production scale and output of the entire ethylene plant.
Quantity and product quality, so ethylene cracking furnace plays an important role in ethylene production equipment and even the whole set of petrochemical production.
The ethylene cracking furnace consist into a convection section and a radiation section. Generally speaking, the role of the convection section is to recover the waste heat of the flue gas for preheating.
And vaporize the raw oil, and superheat the raw oil and dilution steam to the cross-over temperature of the material, and the remaining heat is used for superheating
Ultra-high pressure steam and preheating boiler feed water. In the process of raw material preheating vaporization, inject dilution steam to reduce the
The vaporization temperature can prevent the raw oil from coking during the vaporization process. Each group of coils in the convection section of the cracking furnace is mainly composed of heat exchange furnace
Tubes (bare tubes or finned tubes) are assembled and welded by return bends, end tube plates and intermediate tube plates support the furnace tubes, and some coil tubes
The import and export are brought together through headers. The surroundings of each group of coils are combined with the upper furnace wall to form a module.
The ethylene cracking furnace should be customized according to the characteristics of the process. Most of the process packages of our domestic ethylene plant are purchased from foreign advanced equipment.
According to the process design, the cracking furnace is produced by several manufacturers designated by the designer through bidding.
The cracking furnace is a major energy consumer of the ethylene plant, and its energy consumption accounts for 50%-60% of the total energy consumption of the plant. Reduce energy consumption of cracking furnace
It is one of the important ways to reduce the cost of ethylene production. With the continuous rise of energy prices, relevant departments at home and abroad
Both have strengthened the research on energy-saving measures for cracking furnaces. The energy consumption of the cracking furnace is largely determined by the cracking furnace system itself.
In recent years, the cracking furnace technology has moved towards high temperature, short residence time, large-scale and long-running
cyclical development. By improving the cracking selectivity, improving the thermal efficiency of the cracking furnace, and improving the heat recovery of high-temperature cracking gas
The energy consumption of the cracking furnace can be significantly reduced by taking measures such as closing, extending the operating cycle and implementing new energy-saving technologies.
