Flue gas purification system

Abstract

The invention discloses a flue gas purification system, which comprises a dust and sulfur remover, a high-voltage discharge device, a solution absorption tower and a chimney. The dust and sulfur remover includes a first air inlet and a first air outlet, the high-voltage discharge device comprises a second air inlet, a second air outlet and a flue gas accommodation cavity, and the flue gas accommodation cavity is respectively communicated with the second air inlet and the second air outlet. The side wall of the solution absorption tower is provided with a third air inlet and a third air outletrespectively, the solution absorption tower holds an acidic solution internally, the third air outlet and the third air inlet are respectively located above and below the liquid level inside the solution absorption tower, and the first air inlet is connected to a flue gas transmission pipeline. The first air outlet is communicated with the second air inlet, the second air outlet is communicated with the third air inlet, and the third air outlet is communicated with the chimney. According to the invention, the system firstly performs dust and sulfur removal on flue gas and then removes mercuryfrom the flue gas, and has the characteristics of high flue gas purification efficiency, simple structure, and small space occupation.

Description

technical field [0001] The invention relates to the technical field of heavy metal mercury treatment, in particular to a flue gas purification system. Background technique [0002] In modern society, large-scale boilers are used in thermal power plants and other units. There are toxic compounds containing sulfur and mercury in the boiler flue gas. If these toxic compounds are directly discharged into the atmosphere, they will cause serious pollution to the atmosphere and affect the atmospheric environment. Therefore, boiler smoke Air purification is very important. The traditional method for removing mercury in flue gas is to use activated carbon spray adsorption method, and use improved activated carbon to oxidize and adsorb mercury in flue gas. In this method, due to the very low concentration of mercury in the flue gas, the short residence time of the flue gas in the flue and the high temperature of the flue gas at the injection point of activated carbon limit the utiliz...

AI Technical Summary

Problems solved by technology

However, this system for removing heavy metals in flue gas has the following defects: the operations of dust removal and desulfurization of flue gas are respectively set before and after mercury removal, which increases the steps of flue gas purification, and requires the use of two different equipment for dust removal. and desulfurization, resulting in a large overall system footprint and complex pipeline layout, which is not conducive to the design and use of the system

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