Anti-coking device

The utility model relates to an anti-coking device which is characterized in that furnace walls on two sides of a combustion chamber of an incinerator are respectively provided with a blocking and sealing strip, the two blocking and sealing strips are symmetrically arranged in the combustion chamber of the incinerator, and a first distance is formed between the lower part of each blocking and sealing strip and the surface of a fire grate; a second interval is formed between the arched part of each blocking and sealing strip and the incinerator wall on the corresponding side of the incinerator; an included angle is formed between the upper inclined surface of each blocking and sealing strip and the furnace wall on the corresponding side; a front wall secondary air spraying pipe is arranged on the front wall of the incinerator combustion chamber, and the extension line of the front wall secondary air spraying pipe is mapped to the position below a rear arch of the incinerator combustion chamber. The device has