Ultrasonic integration desulfurization denitration demercuration method and device thereof

Abstract

The invention provides a method for integrally desulfurizing, denitrating and removing mercury under the ultrasonic action. Hydroxyl free radicals OH* with strong oxidizability are released when a cavitation effect is generated in a reaction solution under the ultrasonic action and subjected to the oxidization removal reaction with sulfur oxides, nitrogen oxides and Hg<0> in fume; the cleaned fume is exhausted to the atmosphere; the separated mixed acid solution is applied for producing fertilizers after being absorbed by ammonia water; and the heavy metal precipitate is extracted for the recovery. An ultrasonic generator, an ultrasonic transmitter, a cooling water system, a bubbling bed reactor, an electrostatic dust collector, a fume diffuser, a separating column and a check valve are provided. The ultrasonic transmitter is disposed in the bubbling bed reactor. The fume is introduced into a pipe, sequentially passes through the electrostatic dust collector and the check valve and is introduced into the fume diffuser from the bottom of the bubbling bed reactor. A fume outlet is positioned at the upper part of the bubbling bed reactor. A residue discharge port is formed at the bottom of the bubbling bed reactor. The inlet of the separating column is connected with the outlet of the reaction products of the bubbling bed reactor. The separating columns are respectively provided with an insoluble substance outlet, a chemical feed port and a soluble substance outlet.

Description

technical field [0001] The invention belongs to the field of air pollutant control, and in particular relates to an ultrasonic integrated desulfurization, denitrification and mercury removal method and a device thereof. Background technique [0002] Sulfur oxides and nitrogen oxides in flue gas are the main causes of acid rain and acid fog, which have caused great harm to the ecological environment and human health. It is imperative to effectively control the emissions of the two. Mercury emitted during coal combustion is quite harmful in the local mercury cycle, and its harm is not only hidden, but also potential, that is, the bioaccumulation of mercury is difficult to eliminate, so the problem of reducing mercury emissions is also a national issue an important question. At present, there are many methods for the removal of flue gas pollutants, but few of them can be practically applied. Even the several pollutant control methods currently available in industrial applicati...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the deficiencies of current flue gas pollutant control technologies, the present invention provides an ultrasonic integrated desulfurization, denitrification, and mercury removal method and its device, which mainly use ultrasonic technology to generate cavitation effects and realize the removal of sulfur oxides in flue gas. , nitrogen oxides and mercury integrated removal, the system has the advantages of simple structure, environmental protection and economy, and has a good industrial application prospect

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