Manufacturing method of dual-tubesheet heat interchanger

Abstract

The invention relates to a manufacturing method of a dual-tubesheet heat interchanger, comprising the following steps: (1) carrying out heat treatment on welded channel boxes; (2) machining tube holes on inner tubesheets, outer tubesheets and a whirl plate; (3) enabling heat exchange tubes to pass through the tube holes of the whirl plate and the inner tubesheets and keeping the heat exchange tubes vertical to the inner tubesheets; (4) sleeving a barrel outside the heat exchange tubes to be in tack welding with one of the inner tubesheets, sleeving the other inner tubesheet on the heat exchange tubes to be in tack welding at the other end of the barrel, and then welding the inner tubesheet and the barrel; (5) carrying out expanded joint on the heat exchange tubes and the inner tubesheets by a pipe expander; (6) sleeving the two outer tubesheets on the heat exchange tubes to be in tack welding on the inner tubesheets at both ends of the barrel; (7) welding the outer tubesheets and the heat exchange tubes, carrying out close expansion on the outer tubesheets and the heat exchange tubes by the pipe expander, and then carrying out connection assembly welding on liquid storage cavitiesbetween the inner tubesheets and the outer tubesheets; and (8) respectively installing the channel boxes at both sides of the barrel through channel box flanges.

Description

technical field [0001] The invention relates to a manufacturing method of a double-tube-plate heat exchanger used in industries such as new energy, energy conservation and environmental protection, petroleum, chemical industry, pharmacy and electric power for heat exchange. Background technique [0002] With the continuous advancement of science and technology, industries such as new energy, energy conservation and environmental protection, petroleum, chemical industry, pharmaceuticals and electric power have higher and higher requirements for tube-sheet heat exchangers for heat exchange. The working pressure of the heat exchanger reaches 3.2MPa. When the temperature reaches 350-400°C, the diameter of the heat exchanger cylinder must be over 2.6m, its length must be over 6m, and the thickness of the cylinder must be over 50mm. [0003] At the same time, the heat exchange medium used in the heat exchange process is often corrosive. For example, in the production process of po...

AI Technical Summary

Problems solved by technology

[0008] The present invention provides a method for manufacturing a double-tube-sheet heat exchanger to solve the technical problem that the welding part is easy to corrode and leak in the above-mentioned background technology, and to further solve the problem of improving the heat exchange efficiency of the heat exchanger and satisfying the corrosion resistance and control requirements of the cylinder. cost technical issues

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