All-welded plate type heat exchanger for multi-stream gas-to-gas heat exchange

Abstract

The invention relates to an all-welded plate type heat exchanger for multi-stream gas-to-gas heat exchange; an upright quadrangular heat transfer plate assembly module is chosen as a heat transfer element; dust impurities of heat exchange mediums attached on plates fall because of the self weight; moreover, the surfaces of the plates are smooth and have no flowing dead zone, so that the dust-blowing is convenient, the daily maintenance and cleaning of equipment are facilitated and the dust deposition of the equipment is solved thoroughly. The quadrangular heat transfer plate assembly module is a pure counter-flowing corrugated plate; and a hot medium and a cold medium are in a pure counter-flowing state at two sides of the plates. The corrugations of the plates are capable of strengthening heat transfer and play guiding and supporting roles. After the plates are overlapped, a hot medium passage and a cold medium passage are respectively formed at two sides of the plates, and the corrugations contact with one another; the mutual supporting structure is capable of strengthening the medium pressure-bearing ability of the plates; meanwhile, the equipment is compact in structure and small in volume; and the manufacturing cost of the equipment is reduced.

Description

technical field [0001] The invention relates to a heat exchanger, in particular to an all-welded plate heat exchanger for multi-stream gas heat exchange, which is suitable for heat exchange between high-temperature gas-phase medium and low-temperature gas-phase medium in petrochemical and other equipment, and realizes heat recovery and utilization. Background technique [0002] At present, gas-gas heat exchangers are mostly heat transfer between two media. For example, common gas-gas heat exchangers include heat pipe type, shell and tube type, heat storage type and plate-fin type. This type of heat exchanger generally has heat exchange Low efficiency, bulky, high equipment cost, large floor area and high investment cost. The existing heat exchanger is easy to accumulate dust, and it is difficult to clean once the dust accumulates. With the development of science and technology, heat exchange equipment using corrugated plates as heat transfer elements has gradually matured. ...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, and provide a pure countercurrent heat exchange with high heat transfer efficiency, small size, light weight, reliable long-term operation and low cost, low investment, and not easy to accumulate. Hui's single unit realizes the demand for simultaneous heat exchange of multiple media, a fully welded plate heat exchanger for multi-stream air heat exchange

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