Stepped spiral baffle plate air preheater

Abstract

The invention discloses a stepped spiral baffle plate air preheater, and provides the stepped spiral baffle plate air preheater by improving the distribution of baffle plates of the preheater, which not only overcomes the problems of arch-shaped baffle plates, but also can achieve the heat exchange effect of the spiral baffle plates. The heat exchanger comprises a shell 1, a central tube 2, a baffle plate III 3, a baffle plate II 4, an upper tube plate 5, a baffle plate I 6, a baffle plate IV 7, a lower tube plate I 8, a lower tube plate II 9 and a heat exchange tube 10. The stepped spiral baffle plates of the air preheater have no dead zone of air flow, and the problems that the spiral baffle plates are difficult to process, high in manufacturing cost, long in manufacturing period, difficult to assemble and the like are solved.

Description

technical field [0001] The invention relates to a vertical shell-and-tube air preheater (hereinafter referred to as the preheater). Background technique [0002] For many years, the air preheater used in the carbon black industry is to heat the air through the carbon black tail gas produced in the reaction process through heat exchange and then return it to the reaction furnace for combustion, so as to achieve the purpose of energy saving. The existing problems of the bow-shaped baffle preheater in use are: large pressure drop on the shell side, insufficient heat exchange in the "dead zone" of air flow, easy leakage and side flow, and vibration caused by the transverse impact of air flow on the tube bundle , thus shortening the life of the preheater and other shortcomings. The spiral baffle preheater that has appeared in the past ten years is to divide a spiral into four fan-shaped end-to-end segments. However, due to the difficulty in manufacturing, processing and assembli...

AI Technical Summary

Problems solved by technology

The existing problems of the bow-shaped baffle preheater in use are: large pressure drop on the shell side, insufficient heat transfer in the "dead zone" of air flow, easy leakage and side flow, and vibration caused by the transverse impact of air flow on the tube bundle , thus shortening the life of the preheater and other disadvantages

The spiral baffle preheater that has appeared in the past ten years is to divide a spiral into four sectors connected end to end. has not been widely promoted

Images