Enclosed combustion gas purifying system of calcium carbide furnace

The utility model relates to a hermetical calcium carbide furnace gas purification system that adopts a wet purification system. The system is characterized in that the wet purification system follow the direction of the furnace gas to arrange in series a furnace gas cleaning machine with a strike-off board, a course cleaning Tower I and Tower II and refined cleaning Tower III; wherein, the lower part of the Tower I is the reverse flow section and the upper part is the turbulent ball section; the Tower II is a transitional washing tower for the furnace gas to pass from the course cleaning to the refined cleaning; the Tower II is a refined cleaning tower; the water flow and the furnace gas form a reversed flow course; the water outlet of the gas washing machine is provided with a swirling liquid separator; and the upper clear liquid in the swirling liquid separator is send back to the reverse flow section in the Tower I. The utility model can effectively overcome the problems of fouling and blockage and cab conduct the high-efficient dust removal to the calcium carbide furnace gas.