Urban afforestation waste purification treatment device

An urban afforestation waste purification treatment device is composed of a combustion furnace system, a waste heat utilizing boiler and a dust removing and purifying system which are arranged sequentially in a horizontal direction. The combustion furnace system is composed of an independent incinerator and an independent smoke eliminator. The incinerator comprises a furnace body and a fire grate, wherein the bottom of the furnace body is provided with a slag outlet, and the fire grate is placed inside the furnace body. The smoke eliminator is composed of a combustion-supporting combustor and a smoke eliminating chamber which is placed above the combustion-supporting combustor and is communicated with the combustion-supporting combustor. A fire outlet of a combustion chamber of the incinerator is communicated with the smoke eliminating chamber, the smoke eliminating chamber is further communicated with an air inlet of the waste heat utilizing boiler through a fire outlet of the smoke eliminating chamber, an a