LIQUID CARBON DIOXIDE PRODUCED BY REACTION OF CALCIUM HYDROXIDE AND CALCIUM CARBONATE USING RIGID EXHAUST GAS TO REMOVE SULFUR COMPOUNDS AND THE DEVICE

摘要

The present invention is to effectively remove the carbon dioxide (CO ₂ ) and sulfur oxides (SOx), particularly sulfur dioxide (SO ₂ ) contained in the combustion gas generated during the combustion process in an industrial boiler such as a thermal power plant, such as thermal power plants, Specifically, the combustion gas is introduced into the reaction tank through a known nitrogen removal unit, a dust removal unit, and a sulfur oxide removal unit, and introduced into the reaction tank by introducing liquid calcium hydroxide (Ca (OH) ₂ ) into the reaction tank. Liquid calcium hydroxide reaction for removing carbon dioxide removes carbon dioxide and removes carbon dioxide (CaCO ₃ ), which remains as a sludge after removing carbon dioxide, and then reacts with the sulfur oxide removal unit to remove sulfur dioxide. By recycling sludge and removing sulfur dioxide at the same time, By reusing the hard calcium carbonate, which is the sludge remaining from the removal, to remove sulfur dioxide, nitrogen oxides, carbon dioxide, and sulfur dioxide are removed to the outside, and the purified air can be discharged to the outside to prevent environmental pollution and pollutant gases such as nitrogen oxides and dust. And by removing the carbon dioxide and sulfur dioxide step by step to remove the sulfur components in the exhaust gas by using the liquid calcium hydroxide and carbon dioxide produced by the reaction of liquid calcium hydroxide and carbon dioxide can effectively solve the economic loss and environmental pollution problems by recycling the residual waste. As a device to The specific solution of the present invention is to remove various harmful pollutants contained in the combustion exhaust gas of the combustion facility, and the combustion exhaust gas is supplied through a denitrification reducing agent supplied from the outside in the state where the combustion exhaust gas discharged from the combustion facility is supplied. Nitrogen removal unit 100 for removing nitrogen oxide contained in the gas, and the dust removal filter unit 201 is provided therein to remove and discharge dust of the combustion exhaust gas from which nitrogen is removed from the nitrogen removal unit 100 In the conventional apparatus comprising a dust removal unit 200 and a sulfur oxide removal unit 300 for removing sulfur oxides from the combustion exhaust gas discharged from the dust removal unit 200, Chemical storage tank for storing and injecting the liquid composition for removing carbon dioxide into the reaction tank 420 connected to one end of the blowing means 410 as to remove carbon dioxide from the combustion exhaust gas discharged from the sulfur oxide removal unit 300. Is made of 430, but is connected to the drug storage tank 430 is injected to the multi-stage injection after the drug flows stored in the reaction tank 420 a predetermined level in the upper direction by the pump (P) injection pipe 421 Is provided, the filter unit 422 is provided on the uppermost side of the injection pipe 421, the discharge port 423 is provided on the upper end of the reaction tank 420, the screw 424 is formed on the lower bottom surface and One side of the screw 424 is a liquid hydroxide knife, characterized in that consisting of carbon dioxide removal unit 400 provided to discharge the sludge hard calcium carbonate through the discharge hole 425 formed in the reaction tank 420 And the carbon dioxide is reacted with the resulting precipitated calcium carbonate to an apparatus for removing a sulfur component in the exhaust gas to the configuration characteristics.