Cooling and washing device for coal gasification high-temperature pyrolysis gas

The invention discloses a cooling and washing device for coal gasification high-temperature pyrolysis gas, which is characterized by comprising a pyrolysis gas channel (4) which is communicated with a gas outlet of a gasification chamber and is used for high-temperature pyrolysis gas to flow through, a spray water annular space (3) arranged on the periphery of the pyrolysis gas channel (4), an external cooling water annular space (2) arranged on the periphery of the spray water annular space (3), water spraying holes (5) are formed in the inner wall of the spray water annular space (3), spray water in the spray water annular space (3) is used for conducting spray cooling on the pyrolysis gas channel (4), and external cooling water in the external cooling water annular space (2) is used for cooling the spray water annular space (3) and the pyrolysis gas channel (4). The cooling and washing device is simple in structure, and the problems of cooling of the high-temperature pyrolysis gas conveying pipeline and wa