A New High Efficiency Welded Plate Heat Exchanger

Abstract

The invention discloses a novel efficient welded plate heat exchanger. The novel efficient welded plate heat exchanger comprises first Z-shaped heat exchange plates, second Z-shaped heat exchange plates and a shell. The long edge of each first Z-shaped heat exchange plate is folded outwards. The short edge of each second Z-shaped heat exchange plate is folded outwards. The first Z-shaped heat exchange plates and the second Z-shaped heat exchange plates are arranged in the shell from one side of the shell to the other side of the shell in sequence alternately, so that first fluid passageways and second fluid passageways which are mutually spaced are formed. The folded edges of the first Z-shaped heat exchange plates are fixedly connected to the upper end face and the lower end face of the shell in a sealed mode. The folded edges of the second heat exchange plates are fixedly connected to the side faces of the shell in a sealed mode. A first fluid inlet and a first fluid outlet are formed in the upper end face and the lower end face of the shell respectively and communicated with the first fluid passageways. A second fluid inlet is formed in one side face of the shell, a second fluid outlet is formed in the side face, opposite to the second fluid inlet, of the shell, and the second fluid inlet and the second fluid outlet are communicated with the second fluid passageways. The novel efficient welded plate heat exchanger is tightly sealed and is high in pressure bearing capacity and higher in heat transfer efficiency; the application range is wide, modularization can be achieved, and the engineering adaptability of the novel efficient welded plate heat exchanger is improved.

Description

technical field [0001] The invention belongs to the technical field of heat exchange equipment, and in particular relates to a high-efficiency welded plate heat exchanger. Background technique [0002] A heat exchanger is a device that exchanges heat between two fluids, and it transfers heat based on three heat transfer methods of conduction, radiation and convection or a combination of some of them. Among them, the plate heat exchanger is an efficient and compact heat exchange equipment, which has many advantages such as high heat transfer coefficient and compact structure, and with the improvement of structure and the improvement of large-scale manufacturing technology, the application of plate heat exchanger is increasing received people's attention. The existing plate heat exchangers are divided into two types: welded plate heat exchangers and non-welded plate heat exchangers. [0003] Among them, the main disadvantages of non-welded plate heat exchangers are: low pres...

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Problems solved by technology

[0003] Among them, the main disadvantages of non-welded plate heat exchangers are: low pressure bearing capacity, large pressure drop, prone to accidents at leakage points, and not suitable for heat exchange requirements in large-capacity conditions, such as air preheating for industrial furnaces, especially for non-clean media

[0004] In recent years, welded plate heat exchangers have appeared. Its structure is based on the above-mentioned non-welded plate heat exchangers, which improves the pressure bearing capacity and significantly reduces the chance of leakage. However, it also has a large pressure drop and is not suitable for heat exchange requirements in large-capacity conditions. , especially non-clean media

At the same time, the requirements for welding are relatively high, and the cost of using methods such as laser welding is relatively high.

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