Industrial flue gas purification, desulfurization and denitrification integrated device and working method thereof

Abstract

The invention discloses an industrial flue gas purification, desulfurization and denitrification integrated device and a working method thereof. A section of pretreatment flue is additionally arranged on a flue in front of an absorption tower, and the outlet of the pretreatment flue is connected to the inlet flue of the absorption tower in a downward gradient mode; an ozone spraying device and a pre-spraying device are arranged in the pretreatment flue from the inlet in turn; and the ozone spraying device is connected with an ozone generator through a gas transmission pipeline and converts SO2 into SO3 sulfide which is freely soluble in water, the pre-spraying device absorbs SO3 which is freely soluble in water and converts the SO3 into H2SO4, namely sulfuric acid, and flue gas is cooled simultaneously, so that the aim of removing nitrogen oxide and sulfur dioxide is fulfilled. The device can efficiently remove the nitrogen oxide, has an obvious effect of removing particulate matters such as the sulfur dioxide, dust and the like, and is desulfurization and denitrification equipment with a wide application prospect.

Description

technical field [0001] The invention belongs to environmental protection equipment for industrial flue gas desulfurization and denitrification. Background technique [0002] SO in coal flue gas 2 , NO X It is the main source of air pollution. Relevant data show that acid rain in many places in China has changed from sulfuric acid to nitric acid; at the same time, the increasing amount of ammonia nitrogen that causes eutrophication in water bodies has also led to frequent occurrence of blue-green algae in some lakes in our country. The State Council issued the "Twelfth Five-Year Plan" Comprehensive Work Plan for Energy Conservation and Emission Reduction. In terms of emission reduction, it proposed that in 2015, the national chemical oxygen demand and total sulfur dioxide emissions should be controlled at 23.476 million tons and 20.864 million tons respectively, compared with 2010. The annual output of 25.517 million tons and 22.678 million tons decreased by 8% respectivel...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of separate construction of existing desulfurization and denitrification equipment, huge equipment, complex process, high investment, high operating cost, difficult to use by-products and environmental pollution, and to provide an industrial flue gas purification desulfurization and denitrification device, especially Suitable for new thermal power plants and wet desulfurization renovation projects of existing power plants

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