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One-way radiating furnace tube ethane cracking furnace

A technology of ethylene cracking furnace and radiant furnace tube, which is applied in the direction of cracking, hydrocarbon cracking to hydrocarbon, non-catalytic thermal cracking, etc. It can solve the problems of short operation period of cracking furnace, blockage of radiant furnace tube, large occupied area, etc., and achieves Effects of reducing impact, reducing degree of bending, and preventing secondary reactions

Active Publication Date: 2010-01-06
WISON ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, one-way tube cracking also has some disadvantages: (1) The cracking furnace has a short operating period; (2) The radiation furnace tube is often blocked by coking; (3) Relatively large area and large investment

Method used

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  • One-way radiating furnace tube ethane cracking furnace
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  • One-way radiating furnace tube ethane cracking furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A single-pass radiation furnace tube ethylene cracking furnace, its structure is as follows figure 1 As shown, the cracking furnace comprises a radiation section 1, a convection section 2, a manifold 4, a distribution pipe 5 and a quench boiler 8, the radiation section 1 is arranged on the left side of the cracking furnace, and the radiation section 1 is provided with a radiation chamber 3, and the radiation chamber 3 is equipped with a radiant furnace tube, a bottom burner 9 and a side wall burner 10. The radiant furnace tube is a single-pass furnace tube, which is composed of a bent tube 6 and a straight tube 7. The bent tube 6 and the straight tube 7 are equal-diameter tubes. The inner diameter of the two is the same, which is 35mm. The bending radius of the elbow 6 is 300mm, and the bending direction is parallel to the surface of the tube row. 2 times of the furnace tube spacing between adjacent groups is 2 times of the inner diameter of the radiation furnace tube, ...

Embodiment 2

[0033] A single-pass radiation furnace tube ethylene cracking furnace, the arrangement of the radiation furnace tubes of the cracking furnace is as follows Figure 2a-2b As shown, 96 radiation furnace tubes are arranged in each radiation chamber 3, and every 6 radiation furnace tubes form a group, and every 4 groups form a large group, and each radiation room has four groups of such radiation furnace tubes. If there is only one such radiation chamber in the radiation section, the ethylene production capacity of the cracking furnace can reach 50,000 to 60,000 tons / year; if there are two such radiation chambers in the radiation section, the ethylene production capacity of the cracking furnace can reach 100,000 to 120,000 tons / year. Several important dimensions of the cracking furnace are: the inner diameter of the radiation furnace tube D in = 40mm, the number of radiation furnace tubes forming a group N = 6, the distance between two rows of furnace tubes L 1 =300mm, the furna...

Embodiment 3

[0035] A single-pass radiation furnace tube ethylene cracking furnace, the cracking furnace includes a radiation section, a convection section, a manifold, a distribution pipe and a quench boiler, and the arrangement of the radiation furnace tubes of the cracking furnace is as follows: Figure 3a~3b As shown, the radiant section is set on the left side of the cracking furnace. There is a radiant room in the radiant section. The radiant room is equipped with a radiant furnace tube, a bottom burner and a side wall burner. The curved pipe and the straight pipe are equal-diameter pipes. The inner diameter of the two is the same, which is 60mm. The bending radius of the curved pipe is 2000mm. Form a large group, the distance between the furnace tubes in the group is 5 times the inner diameter of the radiation furnace tube, the distance between the furnace tubes between adjacent groups is 5 times the inner diameter of the radiation furnace tube, the radiation furnace tubes are arrang...

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Abstract

The invention relates to a one-way radiating furnace tube ethane cracking furnace. The cracking furnace comprises a radiating section, a convection section, a quenching furnace, a collecting pipe and an allotting pipe, wherein the radiating section is arranged at the left side of the cracking furnace, and a radiating chamber is arranged in the radiating section; a radiating furnace tube, a bottomcombustor and a side wall combustor are installed in the radiating chamber; the convection section is arranged at the upper part of the cracking furnace; a convection coil pipe is arranged at the lower part of the convection section; the quenching furnace is arranged at the top of the radiating section; the collecting pipe is arranged at the lower part of the radiating section; one end of the allotting pipe is connected with the collecting pipe, and the other end of the allotting pipe is connected with the radiating furnace tube. Compared with the prior art, the invention utilizes the furnacetube space at maximum and reduces the geometric dimension and the occupation area of the cracking furnace; the furnace tubes in adjacent groups are in a symmetrical structure so as to be uniformly heated, and the running period is prolonged; the influence of the furnace tube differential expansion on the furnace tubes can be effectively reduced and the bending degree of the furnace tubes is lightened by a bent pipe structure; and the adopted linear quenching furnace effectively blocks the secondary reaction of cracked gases and improves the yield of products.

Description

technical field [0001] The invention relates to an ethylene cracking furnace, in particular to a single-pass radiation furnace tube ethylene cracking furnace. Background technique [0002] In this technical field, compared with multi-pass tube cracking furnaces, single-pass tube cracking furnaces have the advantages of high selectivity, short residence time and high ethylene yield. At present, several ethylene plants have adopted single-pass tube ethylene cracking furnaces. However, the one-way tube cracking also has some disadvantages: (1) The cracking furnace has a short operating period; (2) The radiation furnace tube is often blocked by coking; (3) Relatively large area and high investment. In response to a certain shortcoming of the single-pass tube cracking furnace, each patent provider has adopted corresponding countermeasures. Contents of the invention [0003] The object of the present invention is to provide a single-pass radiant furnace tube ethylene cracking f...

Claims

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Application Information

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IPC IPC(8): C07C11/04C07C4/04C10G9/20
Inventor 李保有涂国华刘海军乔亲亲卢永生冯恩明李延生薄建民方守毅
Owner WISON ENG
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