An h-type finned tube economizer based on longitudinal vortex

Abstract

The invention discloses an H-shaped finned tube coal economizer based on longitudinal vortexes. The H-shaped finned tube coal economizer comprises a plurality of H-shaped fins in sequential arrangement, wherein the fins are respectively and vertically welded on a fin tube, partial metal in a flow incoming direction of each fin form a plurality of upwards turned wing sheets, and the wing sheets form an incidence angle with the flow incoming direction of the fin surfaces. When fluid passes through a fin tube passage with the wing sheets, a series of longitudinal vortexes can be generated, under the effect of the longitudinal vortexes, the fluid has the component velocity vertical to the main flow direction, the mixing of the fluid near the heat transfer wall surface of the fins and the fluid of a main flow region is accelerated through the component velocity, and the kinetic energy and energy exchange between the fluid of the main body region and the fluid near the heat transfer wall surface of the fins is promoted, so the boundary layer is thinned or destroyed, the heat transfer heat resistance is reduced, and the convective heat transfer coefficient is improved.

Description

technical field [0001] The invention relates to an H-type finned tube economizer based on longitudinal vortex. Background technique [0002] As a general-purpose equipment for heating or cooling purposes by exchanging heat between fluid media at different temperatures, heat exchangers are widely used in various sectors of the national economy. The performance of the heat exchanger and the heat transfer coefficient are directly related to the efficiency of energy utilization. Applying enhanced heat transfer technology to improve the heat transfer efficiency of heat exchangers, reduce the metal consumption and initial investment of heat exchangers, and reduce the energy consumption of heat exchangers is of great practical significance to the realization of energy saving, emission reduction and sustainable development. [0003] As an efficient and compact enhanced heat transfer element, finned tubes have been widely used in industry. As large as the economizer tube bundles of...

AI Technical Summary

Problems solved by technology

In the actual implementation process, one of the technical problems faced by thermal power enterprises is that the smoke temperature after the economizer is too high, which exceeds the reaction temperature of the out-of-stock catalyst, making it unable to work

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