Cracking furnace with two-stroke radiation furnace tube

Abstract

The invention discloses an ethylene cracking furnace of two range radiant furnace tube, which is characterized by the following: adopting special radiant furnace tube; bending the bent (10) of the first range pipe and the bent (12) of the second range pipe in two plans of F and G; possessing flexible inclination of the bent. This invention can occupy less fire box space, which can provide bigger production capability.

Description

technical field [0001] The invention relates to an ethylene cracking furnace with two-pass radiation furnace tubes. Background technique [0002] In the ethylene plant, the cracking furnace is the core equipment. The design of the radiant furnace tube is the key to determine the cracking selectivity, improve the yield of cracked olefins and improve the adaptability to different cracking raw materials. Improving the structure and arrangement of radiant coils has become the core part of the development of tubular cracking furnace technology. For more than 20 years, there have been radiant furnace tubes with different structures such as single-row branch reducer tubes, mixed-row branch reducer tubes, non-branch reducer tubes, and single-pass equal-diameter tubes. [0003] The arrangement of the furnace tubes has developed from the initial single row to double rows. For a single row, the same capacity requires a larger footprint. The advantage is that the circumferential tempe...

AI Technical Summary

Problems solved by technology

1-1 type (U type) two-pass furnace tube has a larger specific surface area and better mechanical properties, but the operating cycle is shorter than other two-pass furnace tubes

The 2-1 type two-pass furnace tube has a larger specific surface area, but the furnace length of the radiation section is longer than that of the 1-1 type furnace tube

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