METHOD FOR INHIBITING DEPOSITION OF CARBON IN DRY GAS PURIFICATION FACILITY AND METHOD FOR INHIBITING DEPOSITION OF CARBON IN COAL GASIFICATION COMPOSITION POWER GENERATING UNIT

摘要

PROBLEM TO BE SOLVED: To provide a dry gas purification facility capable of inhibiting carbon deposition to a remover of impurities, pipelines or the like and dry purifying coal gasified gas and a method of inhibiting deposition of carbon in a coal gasification composition power generating unit equipped with the dry gas purification facility.;SOLUTION: There is provided a method for adding steam or CO₂ gas as a fluid changing a ratio of χ_CO2 and χ_CO to a coal gasification gas produced in a coal gasification furnace so that K_B defined by the formula 1 and a reference value K_B (T) defined by the formula 2 become a relationship of the formula 3 where χ_CO2 and χ_CO are actual molar fractions of CO₂ gas and CO gas in a coal gasification gas (pressure P) flowing into a removal device 6 at a temperature T, χ_CO2(T) and χ_CO(T) are molar fractions of CO₂ gas and CO gas under a condition that a deposition reaction of carbon at the temperature T is not proceeded and P' is a pressure of the coal gasification gas. [Formula 1] K_B=χ_CO2/(χ_CO²×P) [Formula 2] K_B(T)=χ_CO2(T)/(χ_CO(T)²×P') [Formula 3] K_B(T)≤K_B.;SELECTED DRAWING: Figure 2;COPYRIGHT: (C)2016,JPO&INPIT