Method for treating solid waste in low-carbon mode and restraining generation of dioxin

A solid waste and carbon treatment technology, applied in the combustion method, indirect carbon dioxide emission reduction, combustion type and other directions, can solve the problem of high treatment cost, and achieve the effect of reducing carbon emission, low cost and saving resources

Active Publication Date: 2015-09-23
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally speaking, the existing methods for controlling dioxin emissions have defects to varyin

Method used

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  • Method for treating solid waste in low-carbon mode and restraining generation of dioxin

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Example Embodiment

[0027] Example 1:

[0028] The method of low-carbon treatment of solid waste and suppression of dioxin generation includes the following steps:

[0029] S1: Use a crusher to crush solid waste and crush it into solid fuel with a particle size of less than 1 mm. The solid waste includes municipal solid waste, sludge, medical waste, industrial combustible waste, waste biomass, and other solid waste containing Cl element. The solid waste containing Cl element includes plastic, which is additionally added in the preparation process Cl element or Cl element is included in the molecular formula, such as polyvinyl chloride.

[0030] S2: Perform chemical chain combustion treatment on the crushed solid waste. The chemical chain combustion temperature is 850°C to 1000°C. The chemical chain combustion uses an oxygen carrier modified by an adsorbent, and the oxygen carrier is iron ore. The iron ore is crushed and then sieved to obtain iron ore particles with a particle size of 0.1mm to 0.3mm. ...

Example Embodiment

[0031] Example 2:

[0032] S1: Use a crusher to crush solid waste and crush it into solid fuel with a particle size of less than 1 mm. The solid waste includes municipal solid waste, sludge, medical waste, industrial combustible waste, waste biomass, and other solid waste containing Cl element. The solid waste containing Cl element includes plastic, which is additionally added in the preparation process Cl element or Cl element included in the molecular formula, such as polyvinylidene chloride.

[0033] S2: Perform chemical chain combustion treatment on the crushed solid waste. The chemical chain combustion temperature is 800°C to 900°C. The chemical chain combustion uses an oxygen carrier modified by an adsorbent, and the oxygen carrier is copper ore. The copper ore is crushed, and then the copper ore particles with a particle size of 0.1mm~0.3mm are obtained by sieving. The adsorbent used is NaNO 3 , Will NaNO 3 Dissolve in deionized water for wet immersion modification of coppe...

Example Embodiment

[0034] Example 3

[0035] S1: Same as Example 1.

[0036] S2: Perform chemical chain combustion treatment on the pulverized solid waste. The chemical chain combustion temperature is 800°C to 900°C. The chemical chain combustion uses an oxygen carrier modified by an adsorbent, and the oxygen carrier is manganese ore. Manganese ore is then screened to obtain manganese ore particles with a particle size of 0.1mm~0.3mm, using adsorbent K 2 CO 3 Dissolve in deionized water for ultrasonic wet impregnation modification of manganese ore. The frequency of ultrasonic waves is 10-50KHz. Lattice oxygen is used to complete solid waste incineration, condense and capture carbon dioxide produced by chemical chain combustion, and at the same time adsorb and fix gaseous chlorine with adsorbents to achieve low carbon emissions from waste treatment and inhibit the formation of dioxin. The ultrasonic wet impregnation process is a wet impregnation method under ultrasonic waves, which helps the adsorben...

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Abstract

The invention discloses a method for treating solid waste in a low-carbon mode and restraining generation of dioxin. The method for treating solid waste in the low-carbon mode and restraining generation of dioxin comprises the following steps that S1, solid waste is smashed; and S2, chemical looping combustion treatment is conducted on the smashed solid waste, wherein the chemical looping combustion temperature ranges from 800 DEG C to 1000 DEG C, oxygen carriers modified through an adsorbing agent is used for chemical looping combustion, the particle sizes of the oxygen carriers modified through the adsorbing agent is 0.1 mm-0.3 mm, the adsorbing agent can adsorb and fix gaseous chlorine elements and condensate and capture carbon dioxide obtained during chemical looping combustion. The method solves the technical problems that at present, during solid waste combustion, carbon emission is high, and dioxin is generated easily.

Description

technical field [0001] The invention belongs to the technical field of harmless and resourceful utilization of solid waste, and in particular relates to a method for low-carbon utilization of solid waste while inhibiting the formation of dioxins. Background technique [0002] With the development of the economy and the improvement of people's living standards, the output of solid waste is increasing day by day. A large amount of solid waste has caused great pressure and harm to the human living environment. How to realize the "three modernizations" of solid waste harmlessness, reduction and resource utilization has become the focus of research. [0003] Solid waste mainly includes municipal solid waste, sludge, medical waste, plastics, industrial combustible waste and waste biomass. The current methods of solid waste disposal mainly include sanitary landfill, composting and incineration. Practice has proved that the two methods of sanitary landfill and composting not only ...

Claims

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Application Information

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IPC IPC(8): F23G5/033
CPCF23G5/033Y02E20/34
Inventor 赵海波王金星郑楚光
Owner HUAZHONG UNIV OF SCI & TECH
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