METHOD OF COOLING HIGH-TEMPERATURE EXHAUST GAS, APPARATUS THEREFOR AND COMBUSTION TREATMENT EQUIPMENT

摘要

Provided are a method and an apparatus for cooling a high-temperature exhaust gas, capable of cooling effectively the high-temperature exhaust gas with a small amount of water, as well as, a combustion treatment equipment provided with the cooling apparatus. According to this method, a water curtain is formed orthogonal to the flow of the exhaust gas within a passage through which the high-temperature exhaust gas flows, and the high-temperature exhaust gas is allowed to pass through the water curtain to be cooled thereby. The cooling apparatus is provided with a cylindrical cooling chamber (53) having at an upper position a high-temperature exhaust gas inlet (51) and at a lower position a cooled exhaust gas outlet (52); and a plurality of water spray pipes (54) arranged near the high-temperature exhaust gas inlet. Spray nozzles (58) of the water spray pipes (54) are arranged such that spouting axes of the nozzles (58) direct toward the center of the cooling chamber (53) substantially on the same horizontal plane and that water droplets spouted through the respective spray nozzles impinge against one another.