A thermal insulation device for sleeve heat exchanger

Abstract

The present invention relates to the technical field of heat exchange devices, in particular to a thermal insulation device for sleeve heat exchangers, comprising a heat exchange liner, the outer surface of the heat exchange liner is sequentially provided with a first heat insulation layer, The second heat insulation layer and insulation layer, the inner tank is respectively provided with the exchange medium inlet, the heat medium inlet and the sewage outlet; the method of producing the heat preservation device is: select the heat exchange inner tank, and spray evenly on the outer surface of the heat exchange inner tank One layer of the first heat insulation layer, drying; the outer surface of the first heat insulation layer is uniformly covered with a second heat insulation layer, dried; the outer surface of the second heat insulation layer is evenly covered with a layer of heat insulation layer , drying; opening the exchange medium inlet, heat medium inlet and sewage outlet at the appropriate position of the product obtained in the above steps, and the finished product is obtained; the operation is simple, the production efficiency is high, the heat preservation device is simple in structure, difficult to break, and has good heat preservation effect.

Description

technical field [0001] The invention relates to the technical field of heat exchange devices, in particular to a heat preservation device for a sleeve heat exchanger. Background technique [0002] A heat exchanger is a device that exchanges heat between two media, both based on conduction. One or a combination of three heat transfer methods, radiation and convection, to transfer heat. [0003] At present, the common heat exchangers suitable for gas heat exchange mainly include shell and tube type and casing type according to their structural forms, including hot air inlet, hot air outlet, cold air inlet, cold air heating outlet, cold air passage and hot air passage. The hot air inlet and the hot air outlet are communicated with the hot air passage, and the cold air inlet and the cold air heating outlet are communicated with the cold air passage; [0004] The shell-and-tube structure heat transfer tube bundle is fixed on the tube sheets at both ends by welding or expansion,...

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Problems solved by technology

[0006] The difference between the above two structures is that both tube materials are used, their cross-sectional area is relatively small, and the heat transfer efficiency is not high. In order to achieve the effect of strengthening heat transfer, the length and quantity can only be increased, so the weight of equipment and welding are increased. Generally, it is only suitable for occasions where the temperature difference between the two media is small without special devices, otherwise a large stress will be generated due to thermal expansion, and the heat exchanger will eventually be scrapped

[0007] In order to overcome the defects of the above technologies, a sleeve-type heat exchanger with light weight and high heat exchange efficiency has been introduced on the market. The sleeve-type heat exchanger includes a heat preservation device. The existing heat preservation device has a complex structure and is easily broken. Poor insulation effect

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