Flue gas purifying system

Abstract

The invention relates to a flue gas purifying system which comprises a pretreatment system, a flue gas cooling system and an adsorbing tower, wherein flue gas enters the adsorbing tower through the pretreatment system by a pipeline and then is purified, the flue gas cooling system is arranged on a pipeline between the pretreatment system and the adsorbing tower, the flue gas cooling system comprises a flue gas cooler, an external gas diluter, a first temperature sensor, a second temperature sensor and a first flue gas pipe; one end of the first flue gas pipe is fixedly arranged on a gas inlet of the adsorbing tower, a gas inlet baffle plate is arranged on the gas inlet of the adsorbing tower, the other end of the first flue gas pipe is connected with the pretreatment system, the external gas diluter and the flue gas cooler are respectively arranged on the first flue gas pipe, the flue gas cooler is positioned between the external air cooler and the adsorbing tower, the first temperature sensor is positioned between the external gas diluter and the flue gas cooler, the second temperature sensor is positioned between the flue gas cooler and the adsorbing tower, and a baffle plate capable of regulating the gas inflow is arranged on the external gas cooler. According to the flue gas purifying system, local hot spots of active carbon or active coke in the adsorbing tower can be prevented.

Description

technical field [0001] The present invention relates to a flue gas purification system, in particular to a sintering process used in metal manufacturing in ironworks or the smoke generated and discharged during the combustion of fossil fuel (coal) / coke or its compounds in thermal power plants Gas, or a purification system for the flue gas emitted during the incineration of industrial / domestic waste. Background technique [0002] In the sintering process in metal manufacturing in ironworks or in the flue gas generated and discharged during the combustion of fossil fuel (coal) / coke or its compounds in thermal power plants, or in the flue gas emitted during the incineration of industrial / domestic waste, The pollution sources such as SOx (sulfur oxides), NOx (nitrogen oxides), heavy metals (heavy metals containing tribute), dioxins / furans, etc. have caused serious pollution to the environment. In order to reduce the pollution of the above flue gas to the environment, the prior ...

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Problems solved by technology

[0003] The system uses activated carbon or activated coke to purify the flue gas, but because the flue gas itself has a high temperature, and the flue gas is reheated after being adiabatically compressed by the fan, when the temperature of the flue gas entering the adsorption tower exceeds At 150°C, the activated carbon or activated coke in the adsorption tower will generate local hot spots. If the flue gas temperature continues to exceed 150°C, the hot spots will generate fire points, and the activated carbon or activated coke will continue to oxidize, causing the activated carbon or activated coke to fail or even burn. resulting in damage to the adsorption tower

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