Shell heat exchanger of double-barrel casting

Abstract

The invention discloses a shell heat exchanger of a double-cylinder casting, comprising a double-cylinder shell, a base, casting end sockets, an end socket sealing ring, a heat exchange core, a rear sealing cover plate, a threaded plug, a fastening bolt, a cover plate sealing ring, an air inlet, an air outlet and a standby air inlet; the double-barrel shell comprises a first tube and a second tube, the openings of the first tube and the second tube are positioned at one side of the double-barrel shell, and the casting end sockets are arranged on the openings of the first tube and the second tube; the other side of the double-barrel shell is provided with the rear sealing cover plate; the top side of the double-barrel shell is provided with the air inlet, the air outlet and the standby airinlet. The shell heat exchanger provided by the invention has the characteristics of improving the passing rate of one-time test, improving the overall yield rate, shortening the production cycle of the heat exchanger, shortening the design cycle, reducing the outage maintenance loss and having strong capability.

Description

technical field [0001] The invention relates to a double-tube casting shell heat exchanger, especially a heat exchanger with improved one-time test pass rate, improved overall yield, shortened production cycle of heat exchanger, shortened design cycle, and reduced downtime maintenance loss High capacity twin barrel cast shell heat exchanger. Background technique [0002] The shell and tube heat exchanger is the most widely used heat exchanger in the process industry. It is mainly composed of shell, tube sheet, heat exchange tube, head, baffle and other components, and can use stainless steel, ordinary carbon steel, copper or other non-ferrous metals as materials. [0003] When the shell-and-tube heat exchanger is working, one fluid enters through the connecting pipe at one end, passes through the heat exchange tube, and flows out from the connecting pipe at the other end, which is called the tube side; the other fluid enters through a connecting pipe of the shell. , flows ...

AI Technical Summary

Problems solved by technology

[0005] The main body of a conventional single-tube casting heat exchanger is composed of a rolled welded cylinder, front and rear end flanges or heads, and upper tube flange parts. The above parts are all connected by welding, but through the weld Defect detection, its production process is complex and changeable; the heat exchanger often has the following defects: (1) The inspection and maintenance cost of the single-cylinder heat exchanger is high, there is no substitute, and it can only be stopped for maintenance; (2) The design and development cycle is long, Due to the large number of cylinder parts, technical clarification with the customer in the early stage and confirmation of the design strength technical book, the drawing design wasted a lot of time; (3) There are many cylinder parts, many types of materials, less quantity, and a long procurement cycle; (4) ) The dimensional accuracy of the welding cylinder is poor, due to assembly deviation, welding deformation and other reasons; (5) Poor sealing, due to the deformation of the sealing surface of the cylinder flange after welding, resulting in poor one-time pass rate of the test

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