Particles pre-treatment process device of boiler and exhausting gas treatment method of heating power station using the same

摘要

The present invention provides a dust collecting pretreatment device installed between a flue gas desulfurization device and a dust collecting device in order to increase the service life of a bag filter installed in a dust collecting device, which is one of environmental facilities used in a coal-fired power plant, And the dust adhered to the bag filter is reduced to reduce the clogging of the filter hole of the bag filter, thereby improving the life span of the filter, and the exhaust gas of the thermal power plant using the pretreatment device A gas treatment method is provided. A dust pretreatment apparatus for a boiler according to a preferred embodiment of the present invention is a dust pretreatment apparatus installed between a desulfurizer and a dust collector having a bag filter to reduce the concentration of dust contained in the exhaust gas discharged from the boiler A cooling chamber which receives the exhaust gas supplied from the desulfurizer and flows from an exhaust gas inlet formed at one side to an exhaust gas outlet formed at the other side; The cooling air is passed through the cooling chamber to transfer air having a relatively lower temperature than the exhaust gas flowing through the cooling chamber to absorb heat from the high temperature exhaust gas flowing in the cooling chamber and cool it to below the dew point of the moisture contained in the exhaust gas A plurality of cooling tubes for generating condensed water on the surface; A cool air injection box connected to one end of the plurality of cooling tubes for distributing low-temperature air to the plurality of cooling tubes at the same time; A heating chamber connected to the cool air exhaust gas outlet side for introducing cooling exhaust gas discharged from the cooling chamber and then discharging the cooled exhaust gas to the dust collector; And a plurality of heating pipes installed in the heating chamber so as to transfer hot exhaust gas discharged from the air preheater connected to the boiler side to reheat the cooling exhaust gas flowing into the heating chamber.