An improved shell and tube heat exchanger tube box

Abstract

An improved shell and tube heat exchanger tube box, wherein, the first partition of the first divisional partition and the first closing plate are connected to surround the medium inlet connected to the medium inlet connection; the second divisional The second partition and the second closing plate of the partition are connected to surround the medium outlet connected to the medium outlet connection pipe; there is a gap between the first closing plate and the second closing plate and the diaphragm sealing structure; the diaphragm sealing structure There is a top ring between the partition plate and the pipe box end cover against one end of the top ring through the diaphragm sealing structure, so that the other end of the top ring is against the first closing plate and the second closing plate. It has the characteristics of good sealing, simple structure, short manufacturing cycle, low cost, and convenient disassembly and assembly. It is also beneficial to prevent the vibration caused by the medium fluid and avoid the weld between the split-pass partition and the inner wall of the pipe box sub-joint. Fatigue cracking improves the pressure-bearing capacity and service life of the partition plate, which is convenient for large-scale popularization and promotion in the industry.

Description

technical field [0001] This application relates to the tube-and-tube heat exchanger technology in equipment engineering, in particular to a high-temperature and high-pressure working condition for heat exchange and energy-saving equipment used in petroleum refining and chemical industry, coal chemical industry, chemical fertilizer industry, air conditioning, air cooling, and electric power facilities An improved shell and tube heat exchanger tube box with a diaphragm seal structure at the end of the lower tube box. Background technique [0002] In the prior art, the tube-and-tube heat exchanger is the most widely used heat exchanger, widely used in the fields of chemical industry, petroleum, medicine, food, light industry, metallurgy, coking, etc. Convective heat transfer of "steam-steam" and "steam-liquid" heat exchange, as well as heat exchange and condensation processes such as steam condensation and liquid evaporation heat transfer. [0003] The usual structure of the s...

AI Technical Summary

Problems solved by technology

[0008] First, the complex structure

Thread locking ring heat exchanger tube box seal, the compression plate, sealing plate and bolts used are all vulnerable parts; when the seal leaks, the bolts need to be manually tightened to adjust and compensate, and the operation is under pressure and temperature. Make operation troublesome and unsafe

[0009] Second, a high level of soldering is required

[0010] Third, the structure is huge

[0011] If the end of the pipe box adopts a reliable structure with reverse flange and spherical film seal to reduce the structural weight, and because of the difficulty in installing and disassembling the large-area partitions in the pipe box and providing space for personnel to enter and exit the pipe box, and due to the spherical film Existence, the traditional planar partition sealing structure makes it impossible to set the traditional compression sealing structure between the end cap and the tube box partition, causing the short circuit failure between different processes in the tube box, which solves the problem of external leakage but has lead out new problem of endoleak

[0012] Fourth, the structure is often cracked, unsafe and difficult to maintain

With the enhancement of environmental protection awareness, the improvement of oil quality requires a hydrogenation process under higher temperature and pressure. Hydrogen has the smallest molecule and is a highly permeable flammable and explosive medium. The original sealing structure is difficult to adapt to the new one. Process and management requirements, it can be seen that combined with the problems existing in the new tube-and-tube heat exchanger sealed by the spherical film at the end of the tube box, we have developed a simple structure, good sealing reliability, good split-range effect, and high loading and unloading efficiency. The pipe box has extremely far-reaching and great significance in the field of engineering technology

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