Boiler flue gas desulfurization, denitration and mercury removal integrated purification device

Abstract

The invention discloses a boiler flue gas desulfurization, denitration and mercury removal integrated purification device. The boiler flue gas desulfurization, denitration and mercury removal integrated purification device comprises a tower, wherein the tower is provided with a flue gas inlet and a flue gas outlet, the flue gas inlet is formed in the sidewall of the tower, and the flue gas outlet is formed in the top of the tower; a flue gas guide device is arranged at the flue gas inlet, the flue gas guide device comprises a flue gas guide horizontal pipe of which one end extends to the outside of the tower, and the other end of the flue gas guide horizontal pipe extends into the tower and is connected with a flue gas guide vertical pipe opening downwards; the top of the flue gas guide horizontal pipe is provided with a mercury removal and denitration liquid sprayer, and the flue gas guide vertical pipe is internally provided with a desulfurization and denitration liquid sprayer. According to the boiler flue gas desulfurization, denitration and mercury removal integrated purification device disclosed by the invention, the boiler flue gas can be subjected to desulfurization, denitration and mercury removal treatment in the integrated device, thus investment is low, and occupied area is small.

Description

technical field [0001] The invention relates to the technical field of boiler flue gas purification equipment, in particular to an integrated purification equipment for boiler flue gas desulfurization, denitrification and mercury removal. Background technique [0002] In modern society, large-scale boilers are used in thermal power plants and other units. During the operation of the boilers, a large amount of flue gas will be generated. There are toxic compounds containing nitrate, sulfur and mercury in the boiler flue gas. If these toxic compounds are directly discharged into the atmosphere It will cause serious pollution to the atmosphere and affect the atmospheric environment, so the treatment of boiler flue gas is very important. [0003] At present, the desulfurization and denitrification of boiler flue gas are carried out by separate equipment. For example, the commonly used methods for boiler flue gas denitrification equipment are selective catalytic reduction (SOR) ...

AI Technical Summary

Problems solved by technology

These two denitrification methods have the following disadvantages: 1. The removal rate is low; 2. The escape of ammonia is not easy to control, and the odor will cause secondary pollution; 3. The operating cost is too high; 4. Liquid ammonia is easy to explode

Separate equipment for desulfurization and denitrification of boiler flue gas, like the current one, requires large investment and poor purification effect

[0004] In addition, the Chinese state requires that from October 1, 2013, the boiler flue gas should be demercurized and meet the emission standards. However, the current boiler flue gas treatment equipment does not carry out mercury removal treatment. Equipment and denitrification equipment are followed by installation of mercury removal treatment equipment, and it is very troublesome to separately perform mercury removal treatment of boiler flue gas, and it is expensive and occupies a large area

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