Heat exchanger plate bundle having guiding function

Abstract

The invention discloses a heat exchanger plate bundle having a guiding function. The heat exchanger plate bundle comprises a flat plate, wherein guide strips are arranged at a medium inlet and a medium outlet at the two ends of the flat plate; a gas-phase medium is introduced into a heat transfer area on the middle part of the flat plate through the guide strips; the middle part of the flat plate is fixedly connected with a supporting block, thereby forming a heat transfer flat plate; the top of the supporting block is in contact with the plane of another flat plate, and a sealing strip is welded between the two flat plates, thereby forming a single heat transfer plate tube; a plurality of heat transfer plate tubes are piled together to form the heat exchanger plate bundle having the guiding function. The heat exchanger plate bundle has the characteristics of small resistance loss, prevention of dust accumulation and coking, easiness in sweeping, freeness from a flowing dead zone, and safety and reliability in equipment running.

Description

technical field [0001] The invention belongs to the technical field of design and manufacture of heat exchangers, in particular to a heat exchanger plate bundle, in particular to a heat exchanger plate bundle with a guiding function and suitable for air-gas heat exchange. Background technique [0002] Due to the large volume flow rate, when the gas phase medium enters the heat exchanger, the channel flow rate is usually high, and when the flow direction changes, local eddies usually occur, resulting in the formation of a heat transfer dead zone, and in severe cases, it will cause vibration of the plate bundle, and then affect the safety performance of the equipment. According to different structural forms, the plate gas-air heat exchanger generally adopts a corrugated plate structure or a flat plate structure. The advantages of the corrugated plate structure are high turbulence, good rigidity of the plate, and high heat transfer efficiency. The disadvantage is that the resi...

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Problems solved by technology

This patent considers the problem of turbulence, but does not involve the guidance of the medium inlet and outlet, and does not mention the flow state, and the patent is fastened by bolts, which cannot be used for heat exchange of pressurized gas

[0004] The patent "a cast iron plate type air preheater" (ZL201010188803.6) proposes that the heat transfer plate body is made of casting, and that the front and back sides are provided with spoiler fins. As a whole, the patent emphasizes the use of cast iron materials to solve corrosion and abrasion problems, does not involve the flow guidance of gas inlet and outlet, and a single heat transfer plate body is a cross-flow structure, and non-metallic sealing materials or metal bead seals are used between heat transfer plates , can only be used in the occasions with normal pressure and a certain leakage rate is allowed, and cannot be used for heat exchange of pressurized gas. Due to the use of cast iron components, the air preheater is very heavy and occupies a large area, and engineering applications are limited.

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