Novel all-welding plate shell type heat exchanger

Abstract

The invention relates to a novel all-welding plate shell type heat exchanger. The novel all-welding plate shell type heat exchanger comprises a shell (1), a heat exchange plate pair body (7), a plate pass heat exchange fluid inlet, a plate pass heat exchange fluid outlet, a shell pass heat exchange fluid inlet, a shell pass heat exchange fluid gas phase outlet and a shell pass heat exchange fluid liquid phase outlet, wherein the plate pass heat exchange fluid inlet, the plate pass heat exchange fluid outlet, the shell pass heat exchange fluid inlet, the shell pass heat exchange fluid gas phase outlet and the shell pass heat exchange fluid liquid phase outlet are formed in the shell (1); the heat exchange plate pair body (7) is installed in the shell (1) and formed by heat exchange plate pairs (3), each heat exchange plate pair (3) forms a plate pass cavity by welding a plurality of contacts on two metal plates, and the plate pass cavities allow plate pass heat exchange fluid to circulate therein; shell pass cavities are formed between the heat exchange plate pairs (3) and between the heat exchange plate pairs (3) and the shell (1) and allow shell pass heat exchange fluid to circulate therein; and the heat exchange plate pair body (7) is of one of a cuboid structure, a cylinder structure or a spiral cylinder structure. Compared with the prior art, the novel all-welding lamella heat exchanger has the beneficial effects of being high in heat exchange efficiency, small in land occupation, flexible and changeable in structure, large in heat exchange area, compact in heat exchange system and low in pressure reduction.

Description

technical field [0001] The invention relates to a plate-shell heat exchanger, in particular to a novel all-welded plate-shell heat exchanger. Background technique [0002] Heat exchanger is a very important heat exchange equipment, which realizes the heat transfer between various media at different temperatures. It can greatly improve the utilization rate of energy, and is widely used in petroleum, chemical industry, metallurgy, electric power, Refrigeration and food industries. With the rapid growth of energy demand, the industrial scale of various industries is also gradually expanding, which brings challenges to various equipment. For the same working conditions, after the scale increases, the equipment will also increase at the same time, which in turn will bring about A series of difficulties such as land, manufacturing, installation and maintenance. Therefore, how to substantially increase the heat exchange efficiency of the heat exchanger is an important subject. ...

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Problems solved by technology

[0003] At present, the most mature heat exchanger type is the shell-and-tube heat exchanger. On the basis of the conventional shell-and-tube heat exchanger, innovations such as spiral fluted tube heat exchangers, insert heat exchangers in tubes, and baffles have emerged. Rod heat exchangers, tube-fin heat exchangers and other new types, their main principle is to increase the heat exchange efficiency by increasing the turbulence of the fluid on one side, while improving the heat exchange efficiency, the pressure drop is greatly increased, and it is complicated. The transparent structure is not easy to clean; in addition, the plate and shell heat exchanger is a more efficient device, including the heat exchange plate and the shell with grooves, the shell acts as a pressure vessel, and the channels on both sides are small. As a result, the fluid on both sides is disturbed. It has the characteristics of high heat exchange efficiency, small heat loss, compact structure, and small footprint. Compared with rubber-containing gasketed plate heat exchangers, it can withstand higher Pressure and corrosion resistance, but in order to achieve high heat exchange efficiency, the gap between the plates is very small, and it contains contacts, which is very inconvenient to clean, so this type of heat exchanger is limited to be used for both sides of the medium very clean workplace

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