Monotower ammonia desulfuration recovery method for removing aerosols in flue gas

A technology of ammonia desulfurization and recovery method, which is applied in the field of flue gas desulfurization technology, can solve the problems of low recovery rate of ammonium sulfate and the existence of aerosol, etc., and achieve the effect of solving low recovery rate, improving recovery rate and increasing investment

Inactive Publication Date: 2010-12-29
JIANGSU HEYICHANG ENVIRONMENTAL PROTECTION ENG & TECH
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Problems solved by technology

[0003] The purpose of the present invention is to invent a method that can improve the recovery rate of ammonium sulfate and remove aerosols in the exhaust gas for the low ammonium sulfate recovery rate

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  • Monotower ammonia desulfuration recovery method for removing aerosols in flue gas
  • Monotower ammonia desulfuration recovery method for removing aerosols in flue gas

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Such as figure 1 shown.

[0023] A single-tower ammonia desulfurization recovery method for removing aerosol in flue gas is characterized in that it comprises the following steps:

[0024] Firstly, let the high-temperature flue gas enter the desulfurization tower from the smoke inlet on the side of the desulfurization tower T101, and set at least one spray layer in the desulfurization tower and above the smoke inlet (it can be used in specific implementation. figure 1 The three-layer structure shown in, figure 1 The middle three spray layers are X-103A, X-103B, X-103C from the bottom to the last), according to the ratio of spray liquid and flue gas of 1-3:1 to the high-temperature flue gas entering the degassing tower Spraying (spray liquid is measured in flow rate, liters per second, flue gas is measured in volume, cubic meters), and the spra...

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Abstract

The invention relates to a monotower ammonia desulfuration recovery method for removing aerosols in flue gas, which is characterized in that the flue gas desulfuration process is carried out in a combined desulfuration tower with a plurality of functions; the high-temperature flue gas enters from the side surface of the desulfuration tower; the lower part of the desulfuration tower is an oxidation section, the middle part thereof is a main absorbing section and the upper part thereof is a demisting section. In order to remove the SO2 aerosols possibly existing in the desulfuration process and reduce the entrainment of an ammonium sulfate solution in the flue gas (the entrainment of the ammonium sulfate solution refers to the amount of 10-35 percent (m/m) concentration of the ammonium sulfate solution contained in the desulfurated flue gas), a tail gas washing tower is additionally arranged in the rear of the desulfuration tower, and a high-flow nozzle is designed in the tail gas washing tower; and the flue gas departing from the desulfuration tower is washed by utilizing clear water, therefore, the entrainment of the ammonium sulfate solution in the flue gas is reduced, the ammonium bisulfate (ammonium bisulfite) aerosols are absorbed and dissolved, and the recovery rate of ammonium sulfate products is improved.

Description

technical field [0001] The invention relates to a flue gas desulfurization process, in particular to a method for removing sulfur dioxide aerosol in ammonia-based desulfurization net flue gas and improving the recovery rate of ammonium sulfate, specifically a single-tower type removal of aerosol in net flue gas Ammonia desulfurization recovery method. Background technique [0002] At present, flue gas, especially coal-fired boiler flue gas, is one of the most important sources of air pollution and has become an important object of environmental governance. In 2005, my country's SO 2 The annual emission is 25.49 million tons, which greatly exceeds the self-purification capacity of the environment, and the total emission exceeds that of the United States and Europe, ranking first in the world. SO 2 It should be a sulfur resource with great value, but it has become a pollution source with great environmental hazards. Among the existing flue gas desulfurization and purificat...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/50C01C1/24
Inventor 李承泉刘新亚
Owner JIANGSU HEYICHANG ENVIRONMENTAL PROTECTION ENG & TECH
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