Novel regeneration recycle gas aftercooler

Abstract

The invention relates to a novel regeneration recycle gas aftercooler. Baffle plates are in a D type, the radial-direction length of the incomplete part of each baffle plate is one fifth the inner diameter of a shell, and the distance between every two adjacent baffle plates is one second the inner diameter of the shell; sealing match of trapezoid grooves is adopted for a floating tube plate and a floating flange and hook-ring matched faces. Due to the arrangement of the baffle plates and the distances, while flow velocity of fluid media in a shell pass is improved, the suitable turbulence degree of the fluid in the shell pass is achieved, and the heat exchange effect is optimum; due to the trapezoid groove type sealing, it can be effectively avoided that tube pass media and shell pass media leak or seep or mix mutually to increase complexity of the corrosion environment, lead to corrosion and leakage and cause pollution to the environment; due to a coating structure on the surface of a tube pass and a clad layer on the surface of the shell pass, corrosion resistance and scouring resistance of the tube pass and the shell pass can be improved, and economic losses caused by maintenance and replacement are reduced.

Description

technical field [0001] The invention relates to the fields of petroleum and chemical industry, in particular to a novel regenerative circulating gas aftercooler used in a reforming unit of an oil refinery, and belongs to the technical field of cold exchange equipment. Background technique [0002] At present, the regenerative cycle gas aftercooler in the reforming unit of the refinery generally adopts such as figure 1 The floating head heat exchanger shown includes a tube box 1, a shell 2, a heat transfer tube 3, a baffle plate 4, a floating head tube sheet 5, a fixed tube sheet 6, a floating head 7 and a partition plate 9. Partition divider 9 is arranged in the tube box 1 that is fixed at one end of tube plate 6 . A sealing gasket II is provided between the fitting surface of the pipe box flange 11 at the floating head end and the shell flange 21 at the floating head end. The cover plate of the floating head is in the shape of a spherical crown. The flange 71 is connected...

AI Technical Summary

Problems solved by technology

[0009] For the above-mentioned corrosion problems, it has been solved by relying on the metal material itself for a long time. The anti-corrosion time is short, the anti-corrosion process is complicated, and the anti-corrosion effect is not obvious, which increases the industrial use cost of the aftercooler, and the maintenance and replacement of the aftercooler are frequent, resulting in Increased usage costs and reduced production efficiency

In addition, because the sealing form of the floating head tube plate, the floating head and the hook ring is too simple, there will be a problem of medium leakage, causing environmental pollution

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