1. Field of the Invention
The present invention relates to a tower garbage incinerator, and in particular to a tower garbage incinerator consisting of an upper main blast furnace having a zigzag furnace cavity, a garbage inlet and a waste gas outlet. Both the garbage inlet and the waste gas outlet being provided on the top of the blast furnace. The incinerator also includes a lower accessory burning furnace. The garbage incinerator of the present invention has a high efficiency and needs only a small area.
2. Prior Art
Treating garbage by an incinerator has the advantages of reducing the mass of the waste, making the waste harmless, providing resources, and is the most reliable method of waste disposal.
Most conventional large scale incinerators (about 50-2000 tons/day) comprise mixed burning incinerators of the mechanical furnace hearth type, rotary kiln type incinerator or fluidized bed type incinerators. These three types of incinerators each need a large area of land and have poor burning efficiencies. That is, the amount of garbage incinerated is not proportional to the land area of the facility. Such incinerators always have land requirements of several hectares, which makes searching for land to install an incinerator difficult, or otherwise results in the incinerator being located where the garbage must be transported a long way by a garbage truck.
Further, a common disadvantage of the above-mentioned incinerators is that they require too many mechanical operations for tumbling and/or stirring garbage to improve the burning thereof, has too high a probability of breakdown, and has high costs associated with maintenance and operation thereof. For example, in the mixed burning incinerator of the mechanical furnace hearth type, in order to tumble garbage, the furnace hearth tends to become blocked, has a large amount of dead space for tumbling garbage, and the temperature at the furnace floor cannot be elevated (otherwise, the mechanical furnace hearth will be damaged by overheating). Plastic garbage tends to stick to mechanical parts, and/or the furnace hearth might be overheated to result in irreparable damage thereto.
As for the rotary kiln type incinerator, the refractory lining on the inner furnace wall tends to produce fly ash during rotation, and also has a relatively high wear rate and high maintenance cost, as well as being troublesome in the treatment of joining gaps and providing for a gas-proof seal.
As for the fluidized bed type incinerator, garbage should be crushed previously to a size below 5 mm by a crusher. The operation of a crusher is complicated, has much noise, and wears greatly. Moreover, the fluidized bed requires high power and when operated, contaminants such as sodium, lead, borax and the like in the garbages may impair the heat resistance temperature of silica sand fo the fluidized bed (for example, forming viscous sodium silicate glass which may lower drastically fluidizing or form cakes). Therefore, the fluidized bed type incinerator is not commonly used.
In view of overcoming the disadvantages associated with the prior art garbage incinerator, there is a need for a new garbage incinerator which needs only a small area of land to dispose of a great amount of garbage, such that the land for the installation is easy to obtain. The incinerator might then be built near the site of garbage sources.