Detachable plate heat exchanger for heat exchange of cold and heat source fluid such as sewage and refrigerant

Abstract

The invention discloses a detachable plate heat exchanger for heat exchange of cold and heat source fluid such as sewage and a refrigerant. The detachable plate heat exchanger is characterized in that: independent sheet heat exchange units are arranged in a heat exchanger shell; a refrigerant flow channel is hermetically formed in the sheet heat exchange units; and adjacent sheet heat exchange units are arranged in parallel and a space is formed between the adjacent sheet heat exchange units. Compared with the conventional technologies, the sheet heat exchange units are independent of one another, the space of the sheet heat exchange units can be adjusted as required, the optimal heat exchange effect is guaranteed, and meanwhile, no blockage of the fluid is guaranteed; when a certain sheet heat exchange unit is damaged, repair or replacement can be timely performed, and the number of the sheet heat exchange units can also be adjusted as required to adapt to different working conditions.

Description

technical field [0001] The invention relates to a detachable plate heat exchanger for heat exchange between cold and heat source fluids such as sewage and refrigerant, which belongs to the cold (heat) source heat exchange system technology. Background technique [0002] Traditional plate heat exchangers have three structural forms: integral welded, semi-welded and detachable. Generally, the plate heat exchangers (hereinafter referred to as plate heat exchangers) used as the evaporator and condenser of the vapor compression unit are integrally welded and semi-welded; the plate heat exchangers used for water-water and steam-water heat exchange are gaskets. Sealed, with removable plates. Their respective limitations are: [0003] 1. Overall welding (including full welding and overall brazing) plate replacement [0004] 1. Once there is leakage inside the board replacement, it cannot be repaired, and the whole board replacement will be scrapped; [0005] 2. The plates are in...

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Problems solved by technology

[0004] 1. Once there is leakage inside the board replacement, it cannot be repaired, and the whole board replacement will be scrapped;

[0005] 2. The plates are in contact with each other, and the flow channel between the plates is very narrow. When there are solid impurities in the fluid, it is easy to block;

[0006] 3. For brazing plate replacement, it is welded in a vacuum brazing furnace, which is limited to the size of the brazing furnace, the size of the plate is relatively small, and the heat transfer of a single piece is relatively small

[0010] For the detachable plate replacement with gaskets, because each plate is sealed with gaskets, it is limited to the temperature and pressure that the gaskets can withstand, the aging of the gaskets, the compatibility of the gasket material and the refrigerant, etc. , the plate exchange with gasket seal is not suitable as a heat exchanger for refrigerant heat exchange

[0011] In addition, the shapes of the above various forms of plates are all corrugated (herringbone corrugations, spherical corrugations, etc.), and the plates have poor bearing capacity for individual pressure.

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