Flue gas desulfurization tower for coal-fried boilers

Abstract

The invention discloses a flue gas desulfurization tower for coal-fried boilers. The flue gas desulfurization tower comprises a tower body, a tower top, a flue gas inlet, a flue gas outlet and the like. A discharge outlet is formed at the bottom of the tower body; the flue gas inlet is formed at the lower side of the tower body; and the flue gas outlet is formed at the tower top. A nozzle is arranged at the center position of the tower body; a separating filter plate is arranged inside the tower body at the upper end of the flue gas inlet; an electric motor is arranged at the bottom of the tower body; a scraping and stirring device is connected with the electric motor through a rotating shaft. A desulfurizer is filled in the tower body. A circulating port is arranged at a position of the tower body at the upper end of the separating filter plate, and is connected with the nozzle through a pipeline; a circulating pump is arranged on the pipeline between the circulating port and the nozzle; and a liquid level probe is mounted at the upper end of the separating filter plate. With the separating filter plate, calcium sulfate generated after reaction is separated on the lower side of the separating filter plate, so that inhibition to desulfurization caused by calcium sulfate is reduced greatly while desulfurization effect is improved greatly.

Description

technical field [0001] The invention relates to the technical field of flue gas desulfurization, in particular to a flue gas desulfurization tower of a coal-fired boiler. Background technique [0002] CO in combustion products of fossil fuels 2 , SO 2 and NO X The discharge of gaseous pollutants such as gas seriously threatens human health and the safety of the environment. As one of the fossil fuels, coal accounts for about 70% of the primary energy consumption. Therefore, the pollution caused by coal burning is my country's One of the main sources of air pollution, coal-fired boilers play a pivotal role in coal consumption, and the proportion of gas pollutants in the flue gas produced during the production process of coal-fired boilers is very high. Therefore, the flue gas treatment of coal-fired boilers is One of the most important issues in air pollution control. [0003] Existing flue gas desulfurization methods for coal-fired boilers include the following: carbon-bas...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of high desulfurization cost and poor desulfurization effect caused by the need to install additional dehydration equipment during desulfurization of coal-fired boiler flue gas in the currently used technology, and the desulfurization reaction is hindered by the reaction product. A flue gas desulfurization tower for coal-fired boilers with low construction and operation costs, no secondary pollution, and good desulfurization effect

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