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A PROCESS FOR THE TREATMENT OF GAS PHASE ALKALINE CHLORIDES IN A COMBUSTION PLANT, COMBUSTION PLANT FOR CARRYING OUT THE PROCESS, AND THE USE OF A PHOSPHOROUS SUBSTANCE FOR THE TREATMENT OF GAS PHASE ALKALINE CHLORIDES IN A COMBUSTION PLANT
A PROCESS FOR THE TREATMENT OF GAS PHASE ALKALINE CHLORIDES IN A COMBUSTION PLANT, COMBUSTION PLANT FOR CARRYING OUT THE PROCESS, AND THE USE OF A PHOSPHOROUS SUBSTANCE FOR THE TREATMENT OF GAS PHASE ALKALINE CHLORIDES IN A COMBUSTION PLANT
The invention refers to a process for the treatment of gas phase alkalinechlorides ina combustion plant that is arranged for combustion of solid fuel and whichcomprises a combustion chamber from which a flue-gas flow is directed to passaheat transfer device. According to the process a phosphorous substance isadded tothe flue-gas flow, separate from the fuel, the substance chosen from a groupofsubstances that form phosphorous oxide at combustion temperatures of approx.500 °C or above, wherein the phosphorous substance is distributed inthe flue-gasat a location upstream of the heat transfer device as viewed in the flowdirection ofthe flue-gas, and wherein the phosphorous substance is added to an amountwhichresults in phosphatising of gas phase alkaline chlorides included in the flue-gasflow before the chlorides reach the heat transfer device. Analogously herewithacombustion plant is disclosed and arranged for carrying out the process, aswell asthe use of a phosphorous substance for phosphatising alkaline chloride ingaseousphase in a flue-gas flow.
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