Process and system for reducing particle content after flue gas desulfurization

Abstract

The invention provides a process and a system for reducing particle content after flue gas desulfurization. The system comprises a desulfurization tower and a second slurry pond; a first slurry pond is arranged at the bottom of the desulfurization tower; a flue gas inlet is formed in the lower part of the desulfurization tower; a desulfurization stage which is divided into at least two sections is positioned in the desulfurization tower and above the flue gas inlet; the front desulfurization stage section in contact with the flue gas is connected to a first slurry pond through a circulating pump at the first section, and the last desulfurization stage section is connected with the second slurry pond through the circulating pump at the second section; a first defogging device is arranged above the desulfurization stage and connected with a spray section; the spray section is connected with a second defogging device, and a flue gas outlet is formed in the upper part of the second defogging device. The system further comprises a third slurry pond which is connected with the spray section through a third circulating pump. The system is simple in structure; the engineering cost cannot be excessively increased in a new project or a reconstruction project; the content of fine particles in the exhausted flue gas can be obviously decreased, and thus the pollution of the desulfurization system to the surrounding environment can be avoided.

Description

technical field [0001] The invention belongs to the field of air pollutant control, and in particular relates to a process and a system capable of reducing the content of particulate matter in flue gas discharged from a wet desulfurization system. Background technique [0002] Wet desulfurization is currently the most mature technology and the most widely used flue gas desulfurization process. Limestone / lime-gypsum wet flue gas desulfurization technology accounts for about 85% of the FGD systems put into operation in the world. The desulfurization methods of generating units are limestone / lime-gypsum wet flue gas desulfurization, and the desulfurization efficiency can generally reach more than 95%. [0003] With the development of my country's economy and society, flue gas emissions are on the rise, causing environmental problems to become increasingly prominent. In order to protect the ecological environment and people's health, the corresponding pollutant control standards...

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to provide a relatively simple and practical system for reducing the content of particulate matter after flue gas desulfurization, so as to solve the problem that the outlet of the desulfurization system contains relatively large concentration of particulate matter

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