1)two-stage coal gasifier with little pollution 2) little noisy 3)with good after-sale 4) high capacity with ISO certifica Single Stage Of Esong Coal Gasifier:Our single stage coal gasifier uses air and vapor as the gasifying agents to produce mixed gas. It is suitable for gasifying coking coal, hard coke, etc. and is widely used in machinery, metallurgy, chemistry, glass, building materials, ...