A waste disposal device having a wall structure defining an incineration space, a torch assembly separate from the wall structure, and first structure cooperating between the torch assembly and wall structure for maintaining the torch assembly in an operative position on the wall structure. The torch assembly has a torch for generating heat in the incineration space with the torch assembly in the operative position. The torch assembly further has second structure for circulating a cooling liquid in heat exchange relationship with the torch assembly, independently of the wall structure, to thereby effect cooling of the torch assembly. In one form, the torch assembly is removably maintained in the operative position on the wall structure.