Ethylene cracking furnace and composite bridge-cutoff brick holder structure thereof

Abstract

The invention relates to an ethylene cracking furnace and a composite bridge-cutoff brick holder structure of the ethylene cracking furnace. The composite bridge-cutoff brick holder structure comprises a brick holder (1) made of a non-metallic material, and a mounting bracket (2). The mounting bracket (2) comprises a ferrule part (21) made of a metallic material and used for being welded to a furnace wall plate (30). The brick holder (1) is integrally formed and comprises a supporting section (11) used for supporting brickwork and a connecting section (12) inserted in the ferrule part (21). Thus, the heat radiation loss of the furnace outer wall can be reduced, and meanwhile, the material cost can be reduced.

Description

technical field [0001] The present disclosure relates to a composite broken bridge supporting brick structure for an ethylene cracking furnace and the ethylene cracking furnace. Background technique [0002] The brick support is an important masonry support device in the cracking furnace, which is mainly installed in the area where the fuel is burned, that is, the radiant section of the cracking furnace. In the prior art, the supporting brick plates used in the cracking furnace are welded by metal materials. In the actual use process, the following problems are often accompanied: 1) The cracking raw materials are heated to the required temperature in the radiation section for cracking reaction to generate cracking gas At this time, the flue gas temperature in the furnace is as high as 1250°C, and the brick support plate is prone to deformation at high temperature, so the material grade of the metal brick support plate is required to be high, resulting in high material costs;...

AI Technical Summary

Problems solved by technology

In the prior art, the supporting brick plates used in the cracking furnace are welded by metal materials. In the actual use process, the following problems are often accompanied: 1) The cracking raw materials are heated to the required temperature in the radiation section for cracking reaction to generate cracking gas At this time, the flue gas temperature in the furnace is as high as 1250°C, and the brick support plate is prone to deformation at high temperature, so the material grade of the metal brick support plate is required to be high, resulting in high material costs; 2) Due to the high temperature in the cracking furnace, the metal The thermal conductivity of the brick support plate is large, which leads to the temperature of the outer wall of the furnace corresponding to the place where the brick support plate is installed is close to 100°C, the heat loss in the furnace is relatively large, and the operation of the outer wall of the furnace has a greater safety hazard; The lower thermal expansion is large, so it is necessary to reserve a large expansion space for the metal brick support plate, which increases the difficulty of the cracking furnace lining design and at the same time brings new heat dissipation points, resulting in further heat dissipation loss

[0003] Therefore, the problem existing in the prior art is that the metal brick support plate is easy to cause large heat loss on the outer wall of the furnace and high material cost

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