Self-closed integrally cast air preheater

Abstract

The invention discloses a self-closed integrally cast air preheater, which comprises a shell body, a smoke inlet, a smoke outlet, an air inlet, an air outlet and a heat exchange component which is arranged in the shell body, wherein the heat exchange component comprises a plurality of cast fin heat exchange units; each cast fin heat exchange unit comprises a first matrix, a second matrix and finswhich are respectively arranged at the two sides of the middles of the first matrix and the second matrix; the two ends of the first matrixes and the second matrixes are connected and molded into onebody so that circular structures are formed; and main passageway structures are formed in the middle through the first matrixes and the second matrixes. Compared with the prior art, the problem of the seal surface smoke leakage of the heat exchange units, which exists in the cast air preheater formed by cast fin board heat exchange units in the prior art, is solved through the self-closed integrally cast air preheater disclosed by the invention, so that the self-closed integrally cast air preheater has the advantages of simple structure and light weight, is sealed reliably and is convenient to clean.

Description

technical field [0001] The invention relates to equipment technology of special equipment engineering for petrochemical industry, in particular to a self-closing one-piece casting air preheater. Background technique [0002] In the prior art, the common cast air preheater has a structure such as figure 1 As shown, it 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 that the flue gas enters from the flue gas inlet 1, and is discharged from the flue gas outlet 7 after passing through the heat exchange element 3 for heat exchange. After absorbing heat, it is discharged from the air outlet 4 on the side wall of the housing 2 . like figure 2 As shown, the heat exchange element 3 generally includes a plurality of cast fin plate heat exchange units, and the cast fin plate heat exchange unit includes a first base body 31, a ...

AI Technical Summary

Problems solved by technology

The leakage of flue gas from the sealing surface around the heat exchange unit not only greatly reduces the heat exchange effect of the casting air preheater, but also increases the inspection and maintenance, shortens the service life, and consumes a lot of energy, which is not conducive to casting finned plates The development of the heat exchange unit to a large-scale large-scale equipment

[0005] The problem of flue gas leaking from the sealing surface of the heat exchange unit in the casting air preheater mentioned above is also a common problem in other types of air preheaters. The problem of surface leakage can be fundamentally improved, which has extremely far-reaching and great significance in the field of engineering technology

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