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System and method for comprehensive treatment of garbage and carbide slag

A comprehensive treatment, calcium carbide slag technology, applied in the chemical industry, can solve the problems of high heavy metal content, low pyrolysis efficiency, high ash content, etc., to achieve the effect of reducing heavy metal content, increasing surface area, and reducing ceramsite bulk density

Pending Publication Date: 2018-01-05
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current waste pyrolysis technology is basically in the basic research and development or pilot stage, and there is a common problem of low pyrolysis efficiency
At the same time, the pyrolysis solid obtained from pyrolysis has high ash content, low calorific value and high heavy metal content. If it is directly burned, it will still cause the problem of dioxins. If it is further gasified, there will be a problem of low efficiency. If the building There are safety problems in the use of heavy metal precipitation in the material

Method used

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  • System and method for comprehensive treatment of garbage and carbide slag
  • System and method for comprehensive treatment of garbage and carbide slag

Examples

Experimental program
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Effect test

Embodiment 1

[0064] The air-dry garbage (10t / h) is sequentially processed through bag breaking, roller screening, and then sorted and crushed so that the particle size of the garbage is ≤15mm and the water content is 40%. The obtained powdery calcium carbide slag (5t / h) is mixed according to the mass ratio of 1:0.5, and pressed into a high-pressure briquetting machine; the obtained pellets are transported to the material plate of the anaerobic pyrolysis device, and the material thickness is 80mm ; The pellets pass through the preheating zone, pyrolysis zone 1 and pyrolysis zone 2 in order to complete anaerobic pyrolysis, and obtain high value-added raw coal gas and high-temperature pyrolysis pellets. The temperature in the preheating zone is 400°C. The temperature of the pyrolysis zone 1 is 750°C, the temperature of the pyrolysis zone 2 is 800°C, and the pyrolysis time is 90 minutes; the high-temperature pyrolysis pellets are directly transported to the high-temperature calciner for calcina...

Embodiment 2

[0066] The process of comprehensive treatment of garbage and calcium carbide slag in this embodiment is the same as in Example 1, but the process parameters are different, as follows:

[0067] The air-dried garbage is processed in turn by bag breaking, roller sieving, and then sorted and crushed so that the particle size of the garbage is ≤15mm and the water content is 40%. The slag is mixed according to the mass ratio of 1.2:1, and pressed into a high-pressure briquetting machine; the obtained pellets are transported to the material plate of the anaerobic pyrolysis device, and the material thickness is 80 mm; the pellets are preheated in turn in the furnace Zone, Pyrolysis Zone 1 and Pyrolysis Zone 2 complete anaerobic pyrolysis to obtain high value-added raw coal gas and high-temperature pyrolysis pellets. The temperature in the preheating zone is 400°C, the temperature in the The temperature in the second pyrolysis zone is 800°C, and the pyrolysis time is 60 minutes; the hi...

Embodiment 3

[0069] The process of comprehensive treatment of garbage and calcium carbide slag in this embodiment is the same as in Example 1, but the process parameters are different, as follows:

[0070] The air-dried garbage is processed by bag breaking, roller sieving, and then sorted and crushed, so that the particle size of the garbage is ≤15mm and the water content is 45%. The slag is mixed according to the mass ratio of 0.8:1, and pressed into a high-pressure briquetting machine; the obtained pellets are transported to the material plate of the anaerobic pyrolysis device, and the material thickness is 70 mm; the pellets are preheated in turn in the furnace zone, pyrolysis zone 1 and pyrolysis zone 2 complete anaerobic pyrolysis to obtain high value-added raw coal gas and high-temperature pyrolysis pellets. The temperature in the preheating zone is 500°C, the temperature in the The temperature in the second pyrolysis zone is 850°C, and the pyrolysis time is 30 minutes; the high-temp...

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Abstract

The invention relates to a system and method for comprehensive treatment of garbage and carbide slag. The system comprises a carbide slag treatment unit, a mixed forming unit, a pellet pyrolysis unitand a high-temperature roasting unit; the carbide slag treatment unit comprises a carbide slag inlet, a raw coke-oven gas inlet, a syngas outlet and a dried carbide slag outlet; the mixed forming unitcomprises a dried carbide slag inlet, a garbage inlet and a mixed pellet outlet; the pellet pyrolysis unit comprises a mixed pellet inlet, a flue gas outlet, a raw coke-oven gas outlet and a high-temperature pyrolysis pellet outlet; the high-temperature roasting unit comprises a high-temperature pyrolysis pellet inlet, a CO2-rich gas outlet and a roasted ceramsite outlet. The system and method ofthe comprehensive treatment of the garbage and carbide slag disclosed by the invention use an anaerobic pyrolysis furnace to carry out co-pyrolysis on the garbage and the carbide slag, and an obtained product is in direct contact with the carbide slag, so that the high-quality syngas is obtained while the carbide slag is dried; furthermore, the solidification effect of calcium oxide in the carbide slag on garbage heavy metals is fully utilized to prepare safe and high-performance building ceramsite.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a system and method for comprehensively treating garbage and carbide slag. Background technique [0002] With the rapid development of the economy and the acceleration of urbanization, the daily garbage production in my country is about 4 million tons, and the problem of domestic garbage is becoming more and more serious. The problem of garbage disposal will become one of the most important problems that our country will face and one of the problems that need to be solved urgently. Garbage pyrolysis can convert the organic matter contained in the garbage into oil and gas products, which will generate huge economic benefits. However, the current waste pyrolysis technology is basically in the basic research and development or pilot stage, and the problem of low pyrolysis efficiency is common. At the same time, the pyrolysis solid obtained from pyrolysis has high ash con...

Claims

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Application Information

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IPC IPC(8): C10B53/00C01B3/02C04B33/132
CPCY02P40/60
Inventor 刘维娜丁力马志远吴道洪
Owner SHENWU TECH GRP CO LTD
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