Efficient serpentine tube type heat exchanger

Abstract

The invention provides an efficient serpentine tube type heat exchanger, and belongs to the technical field of thermal power auxiliary machines. In the heat exchanger, header assemblies and a serpentine tube system are arranged in a shell, supporting boards in the header assemblies are connected with a cylinder body on the shell, the shell is connected with expansion joints in the header assemblies, the serpentine tube system is connected with the upper header assembly and the lower header assembly, and header tube connectors in the header assemblies are connected with a serpentine tube in theserpentine tube system. According to the efficient serpentine tube type heat exchanger, the header tube type serpentine tube structure is adopted, so that the design problem of a high-parameter heatexchanger is effectively solved; an overheating section and a water drainage section adopt a left-right baffling or up-down baffling mode so that the transverse scouring flow rate of steam or drainedwater can be effectively controlled, and the heat exchange efficiency of a tube bundle is improved; partition plates in the tube system solve a batten splicing mode, so that the problem that a serpentine tube cannot be subjected to tube penetrating in the manufacturing process is solved; and the water drainage section adopts a fully-enclosed immersed structure, so that the problem of unsmooth water drainage is solved, the heat exchange efficiency of the water drainage section is guaranteed, and the drainage end difference is ensured.

Description

technical field [0001] The invention relates to a high-efficiency serpentine tube heat exchanger, which belongs to the technical field of thermal power auxiliary machines. Background technique [0002] Due to the increasing design parameters of thermal power plants, the use of conventional shell-and-tube heat exchangers can no longer meet the design requirements, and it is necessary to design a heat exchanger suitable for high parameters. In the prior art, due to the very high water supply pressure of the thermal power unit, the calculated thickness of the tube sheet of the shell-and-tube heat exchanger has far exceeded the thickness specified in the standard, and the force model of the tube sheet has also exceeded the thickness of the thin shell According to the regulations of the theory, it is impossible to accurately calculate the strength of the tube sheet. Aiming at the problems existing in the prior art, the present invention provides a high-efficiency serpentine tube...

AI Technical Summary

Problems solved by technology

[0002] Due to the increasing design parameters of thermal power plants, the use of conventional shell-and-tube heat exchangers can no longer meet the design requirements, and it is necessary to design a heat exchanger suitable for high parameters

In the prior art, due to the very high water supply pressure of the thermal power unit, the calculated thickness of the tube sheet of the shell-and-tube heat exchanger has far exceeded the thickness specified in the standard, and the force model of the tube sheet has also exceeded the thickness of the thin shell According to the theoretical regulations, the strength of the tube sheet cannot be accurately calculated

Aiming at the problems existing in the prior art, the present invention provides a high-efficiency serpentine tube heat exchanger structure, which adopts the header tube to replace the function of the tube sheet in the shell-and-tube heat exchanger, and improves the overall tube system Redesigned with the shell, the medium flow direction of the superheated section on the shell side adopts forward and reverse mixing, left and right baffles or up and down baffles, which can effectively control the problem of excessive medium flow velocity

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