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Organic hazardous waste gasification melting treatment system and method

A hazardous waste, gasification and melting technology, applied in the direction of combustion methods, incinerators, indirect carbon dioxide emission reduction, etc., can solve the problems of unstable system operation, low fuel circulation, high local temperature, etc., and achieve a good fluidization state and no harmful Less smoke, good applicability

Pending Publication Date: 2022-03-01
中广核环保产业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese invention patent application CN202011458667.8 discloses a system and treatment method for gasification and melting of organic solid waste, in which the fluidized bed adopts an internal circulating fluidized bed, and due to the small amount of fuel circulation, local temperature is prone to be too high during operation. Cause coking in the hearth, leading to unstable operation of the system
[0005] In view of this, it is necessary to provide a system and method for gasification and melting of organic hazardous waste to overcome the problem of hearth coking

Method used

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  • Organic hazardous waste gasification melting treatment system and method
  • Organic hazardous waste gasification melting treatment system and method

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Experimental program
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Embodiment approach 1

[0040] Please refer to figure 1 and figure 2 As shown, this embodiment provides a circulating fluidized bed gasification melting furnace, which includes: a feeding device 1, a circulating fluidized bed gasification furnace 6, a cyclone separator 7, a feeder 8, a melting furnace 9 and Waste heat boiler 11.

[0041] The middle part of the circulating fluidized bed gasification furnace 6 is the hearth, and the lower end is conical. The lower part of the hearth is provided with a gas distributor. One side inside the hearth of the circulating fluidized bed gasifier 6 is provided with a feed inlet 21, and the feed inlet 21 is located above the gas distributor. A material return port 23 is provided below one side inside the furnace, and the material return port 23 is higher than the gas distributor, but lower than the feed port 21 . The lower end of the furnace is provided with an air inlet 24 . A smoke outlet 22 is arranged above the inner side of the furnace, and the smoke out...

Embodiment approach 2

[0048] This embodiment provides a gasification and melting treatment system for organic hazardous waste, which includes:

[0049] The material compatibility and feeding system is used to mix the materials and transport them to the circulating fluidized bed gasifier 6, including the sequentially connected sorting device 1, crushing device 2, compatibility device 3, material pit 4 and screw feeding Machine 5.

[0050] The circulating fluidized bed gasification melting system includes a circulating fluidized bed gasification furnace 6 , a cyclone separator 7 , a feeder 8 , a melting furnace 9 and a slag catcher 10 connected in sequence. The circulating fluidized bed gasification furnace 6 is connected with the screw feeder 5 of the feeding system, and is used for pyrolysis and gasification of organic hazardous waste to obtain pyrolysis gas, carbonized coarse particles, and carbonized fine particles. The cyclone separator 7 is used to separate pyrolysis gas, carbonized fine parti...

Embodiment approach 3

[0054] This embodiment provides a method for treating organic hazardous waste using the organic hazardous waste gasification and melting treatment system of Embodiment 2, which includes the following steps:

[0055] Step S1: Compatibility of organic waste. After preliminarily sorting and crushing the collected organic hazardous waste, according to the elemental composition and calorific value of the material, it is formulated into a compatible material with reasonable elemental composition and stable calorific value. After the compatible material is mixed, it is sent into the circulation by the screw feeder 5 The feed port of the fluidized bed gasifier 6. According to one embodiment of the present invention, the calorific value of the compatible material is between 4000-4500Kcal / Kg, and the particle size of the material is 5mm-10mm.

[0056] Step S2: Compatible material circulating fluidized bed gasification. At a certain temperature, the material is gasified in the circulat...

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Abstract

The invention discloses an organic hazardous waste gasification and melting treatment system and method.The gasification and melting treatment system comprises a material matching and feeding system used for matching and conveying materials; the circulating fluidized bed gasification melting system comprises a circulating fluidized bed gasification furnace, a cyclone separator, a return feeder, a melting furnace and a slag dredger which are connected in sequence, the circulating fluidized bed gasification furnace is connected with the spiral feeding machine of the feeding system, and organic hazardous waste is subjected to pyrolysis gasification to obtain pyrolysis gas, carbonized coarse particles and carbonized fine particles; the cyclone separator separates the pyrolysis gas, the carbonized fine particles and the carbonized coarse particles, the carbonized coarse particles are returned to the circulating fluidized bed gasification furnace through the return feeder, and the pyrolysis gas and the carbonized fine particles enter the melting furnace; the melting furnace is used for carrying out oxygen-enriched combustion on the pyrolysis gas and melting the carbonized fine particles at a high temperature, and molten slag forms a glass body in a slag salvaging device; the waste heat boiler is used for recovering sensible heat of flue gas discharged by the melting furnace; and the flue gas purification system is used for purifying flue gas generated after sensible heat is recovered by the waste heat boiler.

Description

technical field [0001] The invention belongs to the field of hazardous waste treatment. More specifically, the invention relates to a gasification and melting treatment system and method for organic hazardous waste. Background technique [0002] At present, the disposal methods of hazardous waste mainly include incineration and safe landfill. The incineration method uses a rotary kiln to incinerate hazardous waste, and there are problems such as difficulty in flue gas treatment, excessive dioxin, large amount of incineration residue, and excessive reduction rate of residue thermal ignition. The safe landfill method faces problems such as limited landfill storage capacity, limited land resources, and high costs. [0003] Pyrolysis gasification is a technology that can replace the traditional organic hazardous waste incineration treatment method: under anaerobic conditions, a series of continuous and parallel processes occur between the organic components in the waste and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G5/033F23G5/30F23G5/44F23G5/46
CPCF23G5/033F23G5/30F23G5/44F23G5/444F23G5/46Y02E20/34
Inventor 杨小兵靳军涛吕永红宣兆辉谭勇王洪波
Owner 中广核环保产业有限公司
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