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Method and system for co-processing hazardous waste through rotary kiln and sintering machine

A co-processing and hazardous waste technology, which is applied in the direction of combustion method, combustion type, lighting and heating equipment, etc., can solve the problems of abnormal production, low heat utilization rate of organic matter, secondary pollution, etc., and improve the effect of pyrolysis and incineration , enhance the gas mixing effect, accelerate the effect of combustion reaction

Active Publication Date: 2022-07-05
ZHONGYE-CHANGTIAN INT ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The iron-containing residue forms large pieces in the rotary kiln, which has high strength, causing the rotary kiln to be blocked and unable to produce normally
[0007] In the prior art, all organic matter is fully incinerated in the rotary kiln to release heat. The rotary kiln itself has a large heat dissipation, and the utilization rate of heat in organic matter is low
[0008] In the prior art, the incineration residue and fly ash of municipal hazardous waste are usually made of cement, lime , Water is simply stabilized and solidified, and then safely landfilled. Such a disposal process is a waste of residue resources, especially the iron resources in the hazardous waste of steel plants are high in content and have a high recovery value, but the iron resources have not been effectively reused.
Moreover, landfilling has not completely eliminated its environmental impact, and there is still a risk of secondary pollution
[0009] In addition, for the process of disposing of hazardous waste in rotary kilns, there is still a lack of technical solutions for precise control of the flue gas volume or air intake in the rotary kiln

Method used

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  • Method and system for co-processing hazardous waste through rotary kiln and sintering machine
  • Method and system for co-processing hazardous waste through rotary kiln and sintering machine
  • Method and system for co-processing hazardous waste through rotary kiln and sintering machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0133] like Figure 2-3 , 5, a rotary kiln-sintering machine co-processing hazardous waste system, the system includes rotary kiln C1. The rotary kiln C1 includes a kiln head 1 , a kiln body 2 and a kiln tail 3 . The kiln head 1 is provided with a material inlet 101 . The kiln body 2 includes a furnace lining 201 and a furnace hearth 202 . The kiln tail 3 is provided with a material outlet 301 and a material discharge air duct 302 . The material outlet 301 is located at the bottom of the kiln tail 3 . The discharge air duct 302 is located at the upper part of the material outlet 301 , and the discharge air duct 302 communicates with the material outlet 301 . Along the material direction, the furnace chamber 202 is divided into a pyrolysis chamber 20201 and an incineration chamber 20202 . The inside of the furnace lining 201 corresponding to the pyrolysis chamber 20201 is provided with an air duct 4 in the kiln. One end of the air duct 4 in the kiln extends into the kiln ...

Embodiment 2

[0136] Example 1 is repeated, except that four secondary air ducts 7 are separated from the primary air duct 6 . The four secondary air ducts 7 are annularly distributed around the material inlet 101 .

Embodiment 3

[0138] Example 2 is repeated, except that the rotary kiln C1 is provided with 10 air ducts 4 in the kiln. The 10 air ducts 4 in the kiln are evenly distributed along the circumferential direction of the rotary kiln C1. Each air duct 4 in the kiln communicates with the annular air duct 5 arranged on the kiln head 1 .

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PUM

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Abstract

A method for co-processing hazardous waste through a rotary kiln and a sintering machine comprises the steps that (1) pyrolysis is conducted, specifically, high-volatile hazardous waste enters the rotary kiln from the kiln head, combustion air enters the rotary kiln from the kiln tail, and the high-volatile hazardous waste is pyrolyzed in a pyrolysis chamber; (2) incineration is conducted, specifically, material residues obtained after pyrolysis and pyrolysis gas enter an incineration cavity and are mixed with combustion-supporting air to be combusted; 3) flue gas circulation: circulating part of flue gas after incineration into the rotary kiln from the kiln head; (4) cooling is conducted, specifically, the hot slag obtained after incineration is completed is cooled, and cold slag is obtained; 5) sintering: distributing the cold slag to a sintering trolley, and igniting and sintering; and in the step 3), the proportion of the amount of circulating flue gas entering the rotary kiln to the total flue gas amount is calculated according to the combustible matter content and the flue gas temperature in the incinerated flue gas. According to the technical scheme of the reverse flow type rotary kiln-sintering machine, the ring and slag forming phenomenon generated when iron-containing solid waste is incinerated in the rotary kiln is effectively relieved, and accurate control over the amount of circulating flue gas in the rotary kiln is achieved.

Description

technical field [0001] The invention relates to a hazardous waste disposal process, in particular to a rotary kiln-sintering machine co-processing method and system for hazardous waste, belonging to the technical field of hazardous waste co-sintering treatment. Background technique [0002] Generally, the rotary incinerator can be used for hazardous waste incineration and is an important component of the hazardous waste incineration system. Because hazardous waste contains organic matter and has a certain calorific value, it is suitable to be disposed of by incineration, which can not only achieve the purpose of reducing the volume of hazardous waste, but also recover the heat energy in the waste to achieve comprehensive utilization of resources. [0003] The existing hazardous waste incineration rotary kilns are mainly used to incinerate municipal hazardous wastes, including organic resins, municipal sludge, etc. However, with the increasing requirements of iron and steel e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G5/027F23G5/14F23G5/32F23G5/44F23G5/50
CPCF23G5/027F23G5/14F23G5/32F23G5/44F23G5/50
Inventor 叶恒棣颜旭李谦魏进超柴立元周浩宇沈维民
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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