Comprehensive utilization device for desulfurization and denitrification

Abstract

The invention provides a comprehensive utilization device for desulfurization and denitrification. The device comprises an evaporator, a desulfurization and denitrification tower, an ammonia water tank, a concentration and separation tower, wherein a desulfurization chamber and a denitration chamber are arranged inside the desulfurization and denitration tower; the denitrification chamber is arranged above the desulfurization chamber; an ammonia-water atomization spray nozzle is arranged inside the desulfurization chamber; a flue gas inlet of the desulfurization and denitration tower is arranged below the ammonia-water atomization spray nozzle; an ozone and flue gas mixer is arranged inside the denitration chamber and communicates with an ozone source arranged outside of the desulfurization and denitration tower; the ozone and flue gas mixer is composed of a horizontal coil pipe and a vertical straight pipe; the horizontal coil pipe is arranged outside of the vertical straight pipe; the lower side of the horizontal coil pipe is provided with a plurality of first gas jet outlets; the inner side of the horizontal coil pipe is provided with a plurality of first cylindrical pins; the vertical straight pipe is provided with a plurality of second gas jet outlets; the outer side wall of the vertical straight pipe is provided with a plurality of second cylindrical pins; and the first gas jet outlets and the second jet outlets form a downward inclined angle a. The comprehensive utilization device provided by the invention has good desulfurization and denitrification rates, can obtain an ammonium sulfate solution with higher concentration at the same time, facilitates to production of a high-grade ammonia fertilizer, and achieves comprehensive utilization of desulfurization and denitrification of the flue gas.

Description

technical field [0001] The invention relates to a flue gas purification device, which belongs to the technical field of environmental protection, in particular to a desulfurization and denitrification comprehensive utilization equipment for systematically treating flue gas. Background technique [0002] my country's SO 2 and NO X The emissions of SO are among the highest in the world, and the resulting air pollution and acid rain problems are very serious, and the economic losses are huge, which have become the main factors restricting the sustainable development of my country's economy and society. Therefore, the control of SO 2 and NO X Pollution is inevitable. SO 2 and NO X The sources are very wide, mainly from the combustion process of fossil fuels (coal, oil and natural gas), including the flue gas emitted by thermal power plants, smelters, and coal-fired industrial boilers, kilns, etc., in various processes of emission , about 90% comes from the fuel combustion ...

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Problems solved by technology

[0006] The invention provides a comprehensive utilization device for desulfurization and denitrification, which is used to solve the problem of ammonia absorbing NO in the prior art. X The mixing effect is poor, resulting in the removal of NO in the flue gas X The efficiency is low, and the concentration of ammonium sulfate produced by the reaction is not high, so the follow-up ammonia fertilizer production is troublesome and costly, and the denitrification efficiency is further improved to realize the comprehensive utilization of flue gas desulfurization and denitrification

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