The two-stage Pyrolysis cold gasification is composed of a pyrolysis coal gasifier, a gas washing tower, and an electrostatic tar collector. This process has the advantages of high thermal efficiency, high gas calorific value, high tar productivity, simple operation, stable operation, and high automation performance. Moreover, the adaptability of coal types is wide, and various types of coal such as lignite coal, bituminous coal, and anthracite can be gasified. Although it is cold gas, 100% of the gas has undergone electrostatic purification, resulting in high gas cleanliness. The combustion temperature is automatically controlled and tar recovery is achieved, which has multiple advantages such as safety and low investment.

  The biggest advantage of this process is that it not only does not produce phenolic water, but also can synergistically treat some industrial wastewater and industrial residues, achieving the evolution of gasifier towards environmental protection.