High-temperature tubular heat exchanger

Abstract

The invention discloses a high-temperature tubular heat exchanger which comprises a heat exchanger body, a tube pass inlet part and a tube pass outlet part that are respectively connected to the front and the rear of the heat exchanger body, wherein the heat exchanger body comprises a casing, a front end tube plate positioned at the front end of the casing and connected with the casing, a rear end tube plate positioned at the rear of the front end tube plate, parallel to the front end tube plate and connected with the casing, and heat exchanging tubes positioned in the casing and communicating the front end tube plate with the rear end tube plate; the tube pass inlet part and the tube pass outlet part are communicated with the heat exchanging tubes, regions among the heat exchanging tubes are tube spaces, the front part and the rear part of the heat exchanger body are respectively provided with a casing pass outlet part and a casing pass inlet part that are communicated with the casing spaces, at least the front end tube plate and / or the rear end tube plate are / is connected with the casing in a piston sliding way and comprises a plurality of sub tube plates jogged together, thereby better dispersing and eliminating the stress so as to lead the high-temperature tubular heat exchanger to work stably and operate reliably.

Description

【Technical field】 [0001] The invention relates to a high-temperature tubular heat exchanger, in particular to a high-temperature tubular heat exchanger for exchanging heat between media. 【Background technique】 [0002] High temperature heat exchanger is a kind of equipment that can be used for cooling and heat recovery of large flow high temperature flue gas. [0003] For example, in the production line of colored coated steel sheets in the iron and steel industry, a large amount of combustible substances (such as benzene, phenol, resin, etc.) It will cause great harm to the surrounding environment, does not meet the air emission standards and the requirements of environmental protection, and in today's non-renewable resources such as oil and coal are becoming increasingly depleted, it is not in line to directly discharge the above-mentioned large amounts of gases containing flammable substances without utilization. The country's energy-saving requirements run counter to th...

AI Technical Summary

Problems solved by technology

However, in actual use, due to the flow direction of the air in the shell side, the temperature of the upper heat exchange tube in the first high-temperature section is higher than that of the lower heat exchange tube, resulting in the stress of the upper heat exchange tube on the front end tube sheet than that of the lower heat exchange tube. Due to the large size of the tube, the front end tube plate has the problem of tilting up and down, and due to the friction between the tube plate and the shell when the piston slides and other factors, the upper, lower, four corners, middle and other parts of the front end tube plate are subjected to The stress of the high temperature heat exchanger is different. After a long period of operation, the high temperature heat exchanger still has the possibility of local cracking. Affect the service life of high temperature heat exchanger

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