Waste heat boiler ash removal system

The utility model discloses an ash removal system of a waste heat boiler. Wherein the air compression bottle and the acetylene compression bottle are respectively communicated with an air inlet and anacetylene inlet of a mixer through an air pipeline and an acetylene pipeline; an air pressure gauge and an acetylene pressure gauge are respectively arranged on the air pipeline and the acetylene pipeline; a gas outlet of the mixer is communicated with a plurality of deflagration units which are connected in parallel; a first electromagnetic valve is mounted on the main pipeline; the deflagrationunit comprises a plurality of branch pipes which are communicated with the outlet end of the main pipeline and are connected in parallel; a second electromagnetic valve, a mixed gas pressure gauge and a deflagration tank are sequentially installed on the branch pipe in the flowing direction of mixed gas, an electronic sparking plug is installed in the deflagration tank, a gas blowing pipe is installed on the bottom wall o