A shell and tube sewage heat exchanger

Abstract

The invention discloses a shell and tube sewage heat exchanger. The heat exchanger comprises an external shell and internal heat exchange tubes, wherein the shell is provided with a sewage inlet pipe and a sewage outlet pipe. The heat exchanger is characterized in that: a plurality of parallelly arranged heat exchange tube rows are arranged in the shell; each heat exchange tube row is formed by arranging N heat exchange tubes and is supported and fixed through a supporting and fixing plate connected to the shell; and seal heads are arranged at the two ends of the shell and are connected with the shell through fixed flanges. Compared with the prior art, the invention has the advantages that: sewage can directly enter the heat exchanger without blocking the heat exchanger and can be directly subjected to heat exchange with intermediary water, a secondary refrigerant or a refrigerant without being subjected to any treatment, so that a filtering system is eliminated, higher efficiency andsimplicity are achieved, and manufacturing cost is lower; and the heat exchanger has a detachable structure, can be conveniently maintained, and can meet various engineering requirements.

Description

technical field [0001] The invention relates to a heat exchanger used in an industrial heat pump system, specifically a shell-and-tube sewage heat exchanger, which is suitable for liquid containing solid impurities (hereinafter referred to as sewage) to directly enter the heat exchanger, through The heat exchanger realizes heat exchange between sewage and refrigerant, intermediate water, secondary refrigerant and other media. Background technique [0002] The current sewage heat exchanger mainly has the following forms: [0003] 1. Shell-and-tube sewage heat exchanger: the tube side of the heat exchanger uses sewage, and the shell side uses clean water. The heat exchanger cannot enter solid impurities above 1mm, and the sewage needs to be filtered before heat exchange; [0004] 2. Sewage heat exchanger with square tube and wide flow channel: the heat exchange tube of the heat exchanger is a steel square tube with a side length of more than 20mm, and the shell is also square...

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Problems solved by technology

[0004] 2. Sewage heat exchanger with square tube and wide channel: the heat exchange tube of the heat exchanger is a steel square tube with a side length of more than 20mm, and the shell is also square, which can directly enter the sewage, but the heat exchanger is limited to materials and structure, the heat exchange efficiency is very low, and the pressure bearing capacity is poor, the maximum working pressure generally cannot be higher than 0.4Mpa; and, in this structure, the shell and the internal heat exchange tubes are integrally welded and fixed, and cannot be disassembled or replaced;

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