An integrated heat exchange device for wet desulfurization system

Abstract

The invention provides an integrated heat exchange device for a wet desulphurization system. The wet desulphurization system is provided with an inlet flue, an outlet flue and a desulphurization tower. The inlet flue and the outlet flue are provided with a horizontal intersection segment which comprises multiple columns of hot tube bundles. Each column of hot tube bundles comprises a plurality of hot tubes distributed linearly and evenly. The heat absorbing ends of the hot tubes extend into the inlet flue, and the heat release ends of the hot tubes extend into the outlet flue. Each column of hot tube bundles and the adjacent hot tube bundles are distributed in parallel in a staggered mode. Heat of flue gas in a high-temperature segment is used for heating flue gas in a low-temperature segment, an external heat source is not needed, work performance of the system is improved, diffusion of flue gas emission is promoted, and engineering construction investment and occupied area are reduced. Compared with a traditional GGH system and various heat exchange devices replacing the GGH system, the integrated heat exchange device is simple and light in structure, the number of corresponding flue supporting structures can be reduced, overall operation of a heat exchange system is not affected when single hot tubes break down, and stability is high.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to the technical field of wet flue gas desulfurization, and in particular to an integrated heat exchange device for a wet desulfurization system. Background technique [0002] With the rapid development of the global economy, people are also facing severe environmental problems while enjoying its fruits. The pollutants produced by coal-fired power plants and industrial boilers are the main source of air pollution. [0003] The "Coal Power Energy Conservation and Emission Reduction Upgrading and Transformation Action Plan (2014-2020)" requires the eastern region (Liaoning, Beijing, Tianjin, Hebei, Shandong, Shanghai, Jiangsu, Zhejiang, Fujian, Guangdong, Hainan and other 11 provinces and cities) to build new coal-fired power plants. The emission concentration of air pollutants from generating units has basically reached the emission limit of gas turbine units (that i...

AI Technical Summary

Problems solved by technology

However, the natural circulation indirect flue gas reheater of this patent application adopts an external circulation method, and part of the heat is transferred to the boiler feed water through the condensed water. For the flue gas at the outlet of the desulfurization tower, its heat exchange efficiency is relatively Low

And its structure is very complicated, adding a large number of medium circulation pipes, increasing the construction volume of installation, and increasing the difficulty of maintenance

And in order to install the reheater, the flue needs to be adjusted accordingly, that is to say, the cross section of the flue in the installation section needs to be increased. Such a structure will undoubtedly increase resistance and affect the effect of desulfurization

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