Fixed tube sheet type heat exchanger

Abstract

The invention discloses a fixed tube sheet type heat exchanger, which comprises an outer housing, a saddle-type support, connecting pipes, outer connecting pipe sheets, wherein, the exterior sides of the pipe sheets are connected with a front channel box and a rear channel box; a medium flowing space is arranged between the exterior sides of the pipe sheets and the front and rear channel boxes; heat exchange pipes are arranged between the pipe sheets and inside the outer housing; the front and rear channel boxes are provided with medium inlet connecting pipes and medium outlet connecting pipes. The thickness of the front and rear channel boxes of the invention can be made to be very thin, a lot of manufacturing materials and welding, a non-destructive testing and other processes can be saved, and the manufacturing cost of the invention can be reduced. The invention is capable of evenly distributing the medium fluid in the channel boxes, and the flow velocity is relatively slow, therefore, the heat exchange effect can be greatly improved; and the medium fluid produced at the pipe side of the invention can be completely discharged. And as the invention adopts a radial seal structure, the tightness is high under the conditions of high working pressure, the reliability is high, and the working pressure can be as high as 50 MPa.

Description

Technical field: [0001] The invention relates to a heat exchange equipment, in particular to a fixed tube-plate heat exchanger. Background technique: [0002] In the industrialized supercritical fluid extraction process, a fixed tube sheet heat exchanger is often used. The existing fixed tube sheet heat exchanger is designed in accordance with my country's GB151 standard, which includes the front tube box, tube sheet, shell side, tube side, rear tube box and medium inlet and outlet pipes. The front and rear tube boxes of the structure are all forged and welded by flanges, tube sections, and heads. The seal between the tube plate and the tube plate adopts metal flat gaskets. When used in situations with high working pressure, this structure requires volume Larger and thicker-walled front and rear tube boxes make their manufacturing costs high, and their sealing problems are difficult to solve, and their reliability during use is poor. So far, most of the heat exchange problems i...

AI Technical Summary

Problems solved by technology

The front and rear end tube boxes of the structure are forged and welded by flanges, barrel joints, and heads. The seal between it and the tube sheet is sealed by a metal flat gasket. When used in a place with high working pressure, this structure requires volume. Larger, thicker front and rear end pipe boxes make its manufacturing cost higher, and its sealing problem is difficult to solve, and its reliability is poor when it is used

So far, casing heat exchangers are mostly used to solve heat transfer problems in high-pressure applications, but casing heat exchangers have the disadvantages of large volume, high manufacturing cost, and poor heat transfer efficiency.

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