Method and device for decoupling and burning solid waste with high water content

A solid waste and combustion device technology, which is applied in the direction of combustion method, combustion type, lighting and heating equipment, etc., can solve the problem of unsatisfactory drying effect of flue gas, and achieve overcoming ignition difficulties, wide adaptability, and strong application and promotion Effect

Active Publication Date: 2014-06-04
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the high water content solid waste has a large water content, the water content in the flue gas after combustion is very high, so the drying effect of the flue gas is not ideal, and the temperature of the flue gas after heat exchange should not be too low

Method used

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  • Method and device for decoupling and burning solid waste with high water content
  • Method and device for decoupling and burning solid waste with high water content
  • Method and device for decoupling and burning solid waste with high water content

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Embodiment Construction

[0044] Such as figure 1 Or 2 shown in embodiment 1 and embodiment 2 adopt solid heat carrier to simultaneously dry and pyrolyze high water content solid waste in a reactor, burn the decoupled combustion of high water content solid waste distiller's grains completed in the burner method, including the following steps:

[0045] (a) sending high-water solid waste with a water content of 10 to 65% into the dry pyrolysis device 3, and performing dry pyrolysis in the presence of a heat carrier;

[0046] (b) The pyrolysis gas component coming out from the dry pyrolyzer 3 enters the middle part of the burner 1, partially burns, and partially reduces the nitrogen oxides produced by the combustion to reduce the emission of nitrogen oxides;

[0047] (c) the solid mixture produced in the dry pyrolyzer 3 enters the burner 1 for combustion, and the heat generated is transferred to the solid heat carrier;

[0048] (d) The solid heat carrier is discharged from the upper end of the burner 1 ...

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Abstract

The invention relates to a method and device for decoupling and burning solid waste with high water content. The method is characterized by separating the drying / pyrolyzing process from the burning process of the solid waste with high water content, and comprises the steps of: (1) drying / pyrolyzing the solid waste with high water content at the temperature of 150-700 DEG C through heating the solid waste by a solid / gas heat carrier, and separating the mixture thus generated to obtain gas and solid products, wherein the drying / pyrolyzing process refers to a treating process during which drying and pyroysing are carried out simultaneously, or two independent treating processes during which drying and pyroysing are carried out successively; and (2) feeding the solid product generated in step (1) into the burner, and burning same at the temperature of 700-120 DEG C in contact with air, so as to obtain hot ash and hot flue gas. By adopting the method provided by the invention, not only are advantages of existing circulating fluidized beds preserved, but also the invention has other beneficial effects: the fuel is first decoupled and then recoupled respectively in the burning and drying / pyrolyzing processes; pyrolysis gas is utilized to reduce NOx, thereby decreasing the emission of nitrogen oxide; and therefore the influence of high water content on the ignition and combustion of fuel can be effectively avoided, and resource intensive, waste reducing, and harmless treatment can be realized.

Description

technical field [0001] The invention belongs to the high-value utilization of high-water solid waste and the technical field of high-efficiency and clean energy, and in particular relates to a decoupling combustion method and device for high-water solid waste. Background technique [0002] With the rapid development of my country's industry, the output of solid waste with high water content is increasing year by year. After these untreated wastes enter the environment, they will directly cause secondary pollution to water bodies, land and the atmosphere, and have a negative impact on the ecological environment and people. Physical health poses a serious threat. In my country, these solid wastes with high water content mainly include sludge, coal slime, distiller's grains, distiller's grains, brewer's grains, bagasse, traditional Chinese medicine residues, vinegar residues, furfural residues, xylose residues, etc. The main characteristics of these wastes are high yield and hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23G5/027F23G5/04F23G5/44
Inventor 姚常斌董利李强汪印高士秋许光文
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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