An absorption type fully welded plate and shell heat exchanger

Abstract

The invention discloses an absorption type all-welded plate-shell heat exchanger. The absorption type all-welded plate-shell heat exchanger comprises a shell, a core body, a refrigerant water inlet connecting pipe disposed on the shell, a concentrated absorbent solution inlet connecting pipe, a high-temperature hot water outlet seal head, a high-temperature hot water connecting pipe, a low-temperature hot water connecting pipe, a low-temperature hot water seal head and a diluted absorbent solution outlet connecting pipe. The heat exchange core body is installed in the shell, and is composed ofmultiple pairs of heat exchange plates, each pair of heat exchange plates is formed by laser welding of two metal plates, a plate passing cavity is formed and used for flowing of plate passing heat exchange fluid, and the pairs of heat exchange plates are connected with each other through refrigerant water guide pipes and absorbent solution guide pipes. A shell passing cavity is formed between the core body and the shell and used for flowing of shell passing heat exchange fluid, and the metal plate is alternately provided with hemispherical butyl bubbles and semi-ellipsoidal bubbles. The absorption type all-welded plate-shell heat exchanger has the advantages that scaling is not prone to occurring, the heat exchange effect is enhanced, the heat exchange efficiency is improved, the floor space is reduced, the structure is flexible, and design is carried out according to working conditions.

Description

technical field [0001] The invention relates to the field of heat exchangers, in particular to an absorption type fully welded plate-shell heat exchanger. Background technique [0002] As a kind of heat exchange equipment, heat exchanger is widely used in petroleum, chemical industry, metallurgy, nuclear power, medicine and other industries because it can realize heat exchange between media of different temperatures. With the improvement of social productivity and the rapid growth of people's demand for energy, how to improve the efficiency of energy utilization has become a common issue faced by mankind. Among them, the key step to improve energy utilization efficiency is to improve the heat transfer efficiency of the heat exchanger. [0003] In the field of heat exchangers, shell-and-tube heat exchangers, plate heat exchangers, and plate-shell heat exchangers are currently widely used. The shell-and-tube heat exchanger is equipped with a tube bundle that can be fixed on ...

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Problems solved by technology

[0007] 2. The existing plate heat exchanger, because it uses rubber pads for liquid diversion, but the rubber pads are poor in high temperature resistance, high pressure resistance, and corrosion resistance, and are prone to liquid leakage and stringing.

[0008] 3. Ordinary fully welded plate and shell heat exchangers, whose flat plates are easy to deposit dirt, and the relative heat transfer area is small, resulting in low heat transfer efficiency

[0009] 4. The existing all-welded plate and shell heat exchangers, due to the temperature difference in heat transfer and ordinary welding, long-term temperature difference stress and vibration, make the plates prone to failure and the uneven distribution of liquid causes waste of heat exchange area

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