Baffling fin casting plate-type air pre-heater

Abstract

The invention relates to the technology of efficient heat-transfer energy-saving heat exchange equipment in mechanical equipment engineering, in particular to a wave-toothed fin casting plate-type air pre-heater. A baffling fin casting plate-type air pre-heater comprises a plurality of casting fin plate heat exchanging units. Each casting fin plate heat exchanging unit comprises a base board and a fin set arranged on the base board. Each fin set arranged on one base board comprises baffling fins. A base body of each baffling fin is perpendicularly and/or obliquely arranged on one base board. The base body of each baffling fin is at least continuously bent for once so that a flow guiding portion and at least one section of baffling portion which are sequentially connected can be formed. The bent directions of the adjacent baffling portions are reversed. Compared with the prior art, the baffling fins of the baffling fin casting plate-type air pre-heater change the direction of airflow along with the bent change of the baffling portions, when a large flow of air or smoke flows through the baffling fins at high speed, strong scratching motion is generated so that a turbulent flow can be generated, and therefore, stable laminar flows are prevented from being generated on the surfaces of the baffling fins, so that the heat transfer effect is good.

Description

technical field [0001] The invention relates to high-efficiency heat exchange and energy-saving heat exchange equipment technology in mechanical equipment engineering, in particular to a cast plate air preheater with baffle fins. Background technique [0002] Due to its resistance to flue gas dew point corrosion, cast plate air preheaters are often used to replace tubular air preheaters in the transformation of petrochemical, metallurgical, and energy power engineering machinery equipment. [0003] In the prior art, common cast plate air preheaters such as figure 1 and figure 2 As shown, its structure includes a casing 2 , a flue gas inlet 1 , a flue gas outlet 7 , an air inlet 6 , an air outlet 4 , and a heat exchange element 3 and a sealing structure 5 arranged in the casing 2 . Its working process is as follows: the flue gas enters from the flue gas inlet 1, and then discharges to the flue gas outlet 7 after passing through the heat exchange element 3 to exchange heat...

AI Technical Summary

Problems solved by technology

[0005] like figure 2 As shown, the cast finned plate heat exchange unit of the cast plate type air preheater in the above prior art, the fins are arranged in a short fin-like structure perpendicular to the base plate, and the length and height of the fins are close to each other. If the fins are connected in long strips, if you want to increase the heat transfer area and improve the heat transfer efficiency by increasing the fin area, it is easy to form a stable laminar flow on the fin surface, which is not conducive to heat transfer, and the fin surface is relatively thick. Roughness makes the ash easy to be supported by the fins, and the straight-through flow path between the fins is short, which is easy to deposit flue gas ash to form a scale layer, thereby increasing thermal resistance and reducing heat transfer efficiency

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