Purifying treatment device and purifying treatment method for flue gas multicomponent pollutant generated by incinerating refuse

Abstract

The invention discloses a purifying treatment device and a purifying treatment method for flue gas multicomponent pollutants generated by incinerating refuse, and relates to a flue gas purifying treatment device and a flue gas purifying treatment method, and provides a purifying treatment device and a purifying treatment method for flue gas multicomponent pollutants generated by incinerating refuse ,which can remove heavy metals, dioxin, and acidic gases, such as HF, HCL, SO2, SO3 and the like. The device is provided with a circulating fluid bed deacidifying tower, an active carbon bin, an absorbent bin, a material circulating air chute, a bin pump, a bag-type dust remover, byproducts and a water spraying device. Flue gas of a refuse incineration furnace enters in a deacidifying tower section and reacts with circulating dust of the absorbent and active carbon in a Venturi pipe to remove HCL and HF; the flue gas is accelerated by the Venturi pipe, enters in a bed body; the removal of other acidic gases and absorption of the heavy metal and the dioxin are completely by spraying water to reduce temperature; the flue gas is exhausted from the top of the deacidifying tower and enters inthe bag-type dust remover for removing dust; and the cleaned flue gas is exhausted into a chimney through an induced draft fan; and particles trapped by a dust remover are returned into the tower through a material circulating system and small amount of the byproducts are transported to a byproduct bin.

Description

technical field [0001] The invention relates to a flue gas purification treatment device and method, in particular to a circulating fluidized bed that can simultaneously remove HF, HCl, and SO contained in waste incineration flue gas. 2 , SO 3 A device and method for purifying and treating multi-component pollutants of garbage incineration flue gas such as acid components, heavy metals, dioxins and other pollutants. Background technique [0002] Waste incineration is currently the main treatment method for domestic waste volume reduction. Due to the complex composition of domestic waste, the pollution sources in the flue gas generated during the incineration process are more complex than those of pure coal-fired and oil-fired boiler flue gas, including HF, HCl, SO 2 , SO 3 and other acid gases and heavy metals, dioxins, etc. Waste incineration plant tail gas purification technology, especially the elimination of pollutants such as dioxins, has received more and more atten...

AI Technical Summary

Problems solved by technology

[0003] Chinese patents 200810064575.4 and 200810136801.5 propose the combination of waste incineration flue gas purification treatment process and cement production process, although the purification treatment steps and operating energy consumption are reduced, but this process needs to be equipped with cement production lines, which has large limitations and is difficult to promote

Chinese patent 200410101859.8 mixes garbage and limestone at the bottom of the circulating fluidized bed boiler for desulfurization in the furnace. Although a certain desulfurization effect can be obtained, the removal rate of other acid gases is low and the heavy metals in the flue gas cannot be treated by this process. and dioxins, which cannot meet environmental protection emission requirements

The flue gas purification treatment process proposed in Chinese patent 200810069384.7 uses Ca(OH) 2 Slurry is used as an absorbent, using the principle of spray drying and activated carbon adsorption. Although most acid gases and dioxins can be removed, SO in the form of aerosols cannot be removed. 3 and a large amount of heavy metals in the flue gas; at the same time, the rotating spray head equipped in this process is very easy to wear, such as a bag filter, which may cause bag sticking; in addition, the process uses slaked lime pulping system, which will cause lag in outlet discharge regulation

Images