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 per

Method used

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

Examples

Experimental program
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Example Embodiment

[0029] Example 1

[0030] A single-pass radiant tube ethylene cracking furnace with a structure such as figure 1 As shown, the cracking furnace includes a radiant section 1, a convection section 2, a manifold 4, a distribution pipe 5, and a quench boiler 8. The radiant section 1 is located on the left side of the cracking furnace, and the radiant section 1 is provided with a radiant chamber 3 and a radiant chamber 3 is equipped with a radiant furnace tube, bottom burner 9 and side wall burner 10, the radiant furnace tube is a single-pass furnace tube, composed of elbow 6 and straight tube 7, elbow 6 and straight tube 7 are equal diameter tubes, two The inner diameter is the same, 35mm, the bending radius of the elbow 6 is 300mm, the bending direction is parallel to the tube row surface, 1 radiant furnace tube forms a group, 2 groups form a large group, the distance between the furnace tubes in the group is the inner diameter of the radiant furnace tube The furnace tube spacing be...

Example Embodiment

[0032] Example 2

[0033] A single-pass radiant tube ethylene cracking furnace, the radiant tube of the cracking furnace is arranged as Figure 2a~2b As shown, 96 radiant furnace tubes are arranged in each radiant chamber 3, and every 6 radiant furnace tubes form a group, and every 4 groups form a large group, and each radiant chamber has four groups of such radiant 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 the radiation section is equipped with two such radiation chambers, 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 radiant furnace tube D in =40mm, the number of radiant furnace tubes forming a group N=6, the distance between two rows of furnace tubes L 1 =300mm, the furnace tube spacing P in the group 1 =...

Example Embodiment

[0034] Example 3

[0035] A single-pass radiant tube ethylene cracking furnace. The cracking furnace includes a radiant section, a convection section, a manifold, a distribution tube and a quench boiler. The radiant tube of the cracking furnace is arranged as Figure 3a~3b As shown, the radiant section is located on the left side of the cracking furnace. The radiant section is equipped with a radiant chamber. The radiant chamber is equipped with a radiant furnace tube, a bottom burner and a side wall burner. The radiant furnace tube is a single-pass furnace tube, which consists of a curved tube. The elbow and the straight pipe are equal-diameter pipes, the inner diameter of the two is the same, 60mm, the bending radius of the elbow is 2000mm, the bending direction is parallel to the surface of the tube row, 6 radiant furnace tubes form a group, 2 groups A large group is formed. The distance between the furnace tubes in the group is 5 times the inner diameter of the radiant furnace...

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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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