H-shaped fin tube-type coal economizer with novel structure

Abstract

The invention discloses an H-shaped fin tube-type coal economizer with a novel structure. The H-shaped fin tube-type coal economizer with the novel structure comprises round tubes, fins, wearing bushes and the like. All the round tubes adopt a parallel arrangement way, the same ends of the round tubes are alternately connected together, and inner cavities of all the round tubes communicate with one another. The fins are evenly distributed in the longitudinal direction of the round tubes, and the surface of each fin is perpendicular to the axial direction of the corresponding round tube. The H-shaped fin tube-type coal economizer with the novel structure is characterized in that the fins evenly distributed on the round tubes comprise two identical rectangular thin plates, circular arc grooves are evenly formed on the two identical rectangular thin plates in the longitudinal direction of the two identical rectangular thin plates, and the circular arc grooves share the same cross-sectional shape and same number with the round tubes. The sides, provided with the circular arc grooves, of the two identical rectangular thin plates are symmetrically welded on the round tubes, and the H-shaped fin tube-type coal economizer with the novel structure is formed through combination.

Description

technical field [0001] The invention relates to an energy-saving device. It specifically relates to the technical field of boiler energy recovery, in particular to an H-shaped finned tube economizer installed in the furnace of a coal-fired boiler. Background technique [0002] At present, the exhaust gas temperature of many power plant boilers in my country is higher than the design requirements, and reducing the exhaust gas temperature has very important practical significance for saving fuel and reducing pollution. Therefore, in the boiler manufacturing industry, in order to save coal and improve energy utilization, finned tube economizers are installed in the furnaces of most large and medium-sized boilers. This kind of finned tube economizer is the most widely used H-shaped finned tube economizer. The traditional H-shaped finned tube economizer includes a plurality of circular tubes arranged in parallel and connected alternately at the same ends, so that the inner cavi...

AI Technical Summary

Problems solved by technology

Since the fins on the round tube are spiral, there is a gap between the fins on two adjacent round tubes, so that the heat transfer area of ​​the whole finned tube economizer is small, resulting in low heat transfer efficiency

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