Water-cooled-wall multi-stage stair type incinerator

Abstract

The invention discloses a water-cooled-wall multi-stage stair type incinerator which comprises an incinerator body. A smoke outlet and a slag outlet are formed in the upper portion and the bottom of the incinerator body. A feed inlet is formed in the incinerator wall on one side of the incinerator body. A primary combustion chamber and a secondary combustion chamber are arranged on the portions, below the feed inlet and above the feed inlet, of the incinerator body respectively. A rotary kiln feeding device and a feeding device are arranged on the feed inlet. The incinerator is characterized in that the portion, where the primary combustion chamber is arranged, of the incinerator body is obliquely arranged, at least two sections of lower side incinerator walls of the incinerator body are arranged and in a stair shape, and each section of stair-shaped incinerator wall is provided with a stirring device in the horizontal direction. The upper side incinerator wall where the primary combustion chamber is located is sequentially provided with a combustion draught fan, a stirring draught fan and a primary burner from top to bottom. The combustion draught fan, the stirring draught fan and the primary burner are communicated with the primary combustion chamber. The outer side of the incinerator wall where the secondary combustion chamber is located is provided with a secondary burner communicated with the secondary combustion chamber. The incinerator is high in adaptability to burning garbage and sufficient in incineration, and the incinerator body is resistant to impact, long in service life, low in investment and operation cost, low in maintenance cost and high in heat efficiency. The incinerator is suitable for waste incineration disposal.

Description

technical field [0001] The invention relates to an incinerator. Specifically, it is a water-cooled wall multi-stage stepped garbage incinerator used for incinerating waste. Background technique [0002] At present, the incinerators used for waste incineration are mainly fluidized bed incinerators, rotary kiln incinerators, etc. Among them: the fluidized bed incinerator has strict requirements on the particle size of the material (particle size is less than 50mm), the complexity of the waste pretreatment process will increase the possibility of secondary pollution, and some low melting point substances in the waste will be in the fluidized bed It is in a molten state within the working temperature range, sticks to the bed material, and destroys the fluidized state. Therefore, this kind of incinerator is not very adaptable to the burning garbage, and the combustion is often not very sufficient; although the technology of the rotary kiln incinerator is mature, The operation i...

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Problems solved by technology

Among them: the fluidized bed incinerator has strict requirements on the particle size of the material (particle size is less than 50mm), the complexity of the waste pretreatment process will increase the possibility of secondary pollution, and some low melting point substances in the waste will be in the fluidized bed It is in a molten state within the working temperature range, sticks to the bed material, and destroys the fluidized state. Therefore, this kind of incinerator is not very adaptable to the burning garbage, and the combustion is often not very sufficient; although the technology of the rotary kiln incinerator is mature, The operation is simple and flexible, and it is suitable for treating solid and liquid wastes of various shapes, but its disadvantages are high mechanical technical requirements, large investment, and high maintenance costs; low thermal efficiency; the entire system requires good air tightness, which is difficult for operation. Difficulties in operation; solid waste has a strong abrasive effect on refractory materials, and the service life is short; centralized shutdown and maintenance takes a long time; for small and medium-sized devices with a processing scale of less than 6-8t / d, the investment cost is high and investment recovery low rate

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