Ethylene pyrolysis furnace

Abstract

An ethylene cracking furnace comprises a radiation segment, a convection segment, a bottom burner, sidewall burners and a quench boiler; the radiation segment is provided with a radiation room; radiation furnace tubes used for the pyrolysis of hydrocarbons and petroleum distillate are arranged inside the radiation room; each radiation furnace tube is composed of an inlet tube and an outlet tube; each inlet tube and each outlet tube are respectively provided with one channel; at least a radiation room 3 is arranged in the radiation segment of the cracking furnace; the radiation furnace tubes are arranged in two rows in the radiation room; each row of radiation furnace tubes forms a tube row plane; an inlet tube 6 and an outlet tube 7 of a radiation furnace tube are in two different tube row planes in an alternating interval way; the bottom parts of the inlet tube 6 and the outlet tube 7 are connected together through a symmetrical U-connector 8. The invention achieves a large-scale cracking furnace; the furnace tube arrangement way of the invention improves the radiation heat transfer efficiency of the radiation furnace tubes so as to prolong the operating cycle of the cracking furnace and reduce energy consumption of products.

Description

Technical field:

[0001] The invention relates to a cracking furnace for producing olefins such as ethylene and propylene by pyrolyzing hydrocarbons and petroleum fractions. The utility model belongs to the field of hydrocarbon oil cracking equipment. Background technique:

[0002] Since the successful development of the vertically suspended standpipe cracking furnace in the 1960s, ethylene cracking technology has made great progress. At present, the ethylene cracking furnace licensors are focusing their research on increasing the size of the cracking furnace, improving the selectivity of the cracking furnace, increasing the product yield, improving the safety of the cracking furnace operation, reducing the energy consumption of the product, and reducing the construction cost of the cracking furnace. .

[0003] Patent CN1730449A describes a kind of ethylene cracking furnace structure and single-row arrangement of radiation furnace tubes. Although the cracking furnace of thi...

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