Desulfurization and denitration method by using screened-airflow shock wave suspension

Abstract

The invention discloses a desulfurization and denitration method by using a screened-airflow shock wave suspension. The method comprises the following steps: step 1, gas containing sulfides and / or nitrides are introduced to the bottom of a desulfurization and denitration device; and the interior of the desulfurization and denitration device is divided into at least two desulfurization and denitration units by partition boards in a vertical direction, each desulfurization and denitration unit is provided with an airflow distribution net, and each airflow distribution net is provided with net-shaped through holes; step 2, water or an alkaline solution is introduced to the airflow distribution net, the ratio of the water to the gas is (2-3):1000, the gas is fully absorbed by the water or the alkaline solution for reaction in a gas rising process, and the sulfides and / or the nitrides in the gas are removed; and step 3, the gas purified in the step 2 is exhausted from the top of the desulfurization and denitration device. The desulfurization and denitration method by using the screened-airflow shock wave suspension is safe, energy conservation and environmental protection are achieved, the technological process is short, and production costs are greatly saved.

Description

technical field [0001] The invention relates to the technical field of desulfurization and denitrification methods, and more specifically, relates to a method for desulfurization and denitrification by using a sieved airflow shock wave suspension. Background technique [0002] With the development of our country's economy, the environmental pollution caused by a large amount of energy consumption is becoming more and more serious. my country is a country where coal is the main energy source. Harmful substances such as soot, sulfur dioxide, and nitrogen oxides contained in coal-burning flue gas have caused serious air pollution. [0003] There are many types of flue gas desulfurization technologies for domestic coal-fired power plants, such as limestone-gypsum method, simple wet method, wet ammonia method, electron beam method, etc. Selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR) are the most widely used flue gas denitrification technologies....

AI Technical Summary

Problems solved by technology

There are many problems in the existing desulfurization and denitrification technologies, such as the large fixed investment and high cost of desulfurization of the limestone-gypsum method, and the large amount of gypsum produced is difficult to handle. Problems, SNCR technology has a series of problems such as high reaction temperature, poor mixing degree of reducing agent and flue gas, low denitrification efficiency, and large amount of ammonia gas escape.

Therefore, the current flue gas desulfurization and denitrification process has the following problems: low removal efficiency, low catalyst service life, solid waste generation, ammonia escape, high investment cost, large installed capacity of the system, large floor area, high operating cost, Low economic benefit

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