Box type metal net spark catcher

The utility model provides a box type metal net spark catcher, relates to the technical field of flue gas emission, and solves the problems that in the high-temperature flue gas emission process, if viscous scraps such as rubber oily scraps and rubber greasy filth exist in flue gas, the spark catcher is influenced, the blockage problem is caused, and the emission of the flue gas and the cooling and extinguishing of sparks are influenced. A partition plate is arranged in the middle of the main smoke pipe, a spark catching box is arranged on one side of the main smoke pipe, a blocking assembly is arranged in the spark catching box and detachably connected, a dust collecting bag is arranged at the bottom of the spark catching box, and a smoke outlet pipe is arranged at the top of the spark catching box. The device is further provided with a blocking assembly, sparks in the high-temperature flue gas can be further cooled and extinguished through the blocking assembly, meanwhile, impurities are blocked, and oily r