A low-carbon method for treating solid waste and inhibiting the formation of dioxins

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

Active Publication Date: 2017-09-29
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • 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 varying degrees, and the treatment costs are relatively high, and even secondary treatment is required

Method used

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  • A low-carbon method for treating solid waste and inhibiting the formation of dioxins

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Experimental program
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Effect test

Embodiment 1

[0028] A low-carbon method for treating solid waste and inhibiting the formation of dioxins, comprising the following steps:

[0029] S1: Use a shredder to crush solid waste into solid fuels with a particle size of less than 1mm. The solid waste includes municipal solid waste, sludge, medical waste, industrial combustible waste, waste biomass, and other solid wastes containing Cl elements. The solid wastes containing Cl elements include plastics, which are additionally added during the preparation process. The Cl element or the molecular formula includes the Cl element, such as polyvinyl chloride.

[0030] S2: Carry out chemical looping combustion treatment on the pulverized solid waste. The chemical looping combustion temperature is 850°C-1000°C. The chemical looping combustion uses an oxygen carrier modified by an adsorbent, and the oxygen carrier is iron ore. Crush the iron ore, and then obtain iron ore particles with a particle size of 0.1 mm to 0.3 mm by sieving. The ad...

Embodiment 2

[0032] S1: Use a shredder to crush solid waste into solid fuels with a particle size of less than 1mm. The solid waste includes municipal solid waste, sludge, medical waste, industrial combustible waste, waste biomass, and other solid wastes containing Cl elements. The solid wastes containing Cl elements include plastics, which are additionally added during the preparation process. The Cl element or the molecular formula includes the Cl element, such as polyvinylidene chloride.

[0033] S2: Perform chemical looping combustion treatment on the pulverized solid waste, the chemical looping combustion temperature is 800°C-900°C, the chemical looping combustion uses an oxygen carrier modified by an adsorbent, the oxygen carrier is copper ore, first Crush copper ore, and then obtain copper ore particles with a particle size of 0.1mm to 0.3mm by sieving. The adsorbent used is NaNO 3 , the NaNO3 Dissolved in deionized water for wet impregnation modification of copper ore. Lattice ox...

Embodiment 3

[0035] S1: Same as Example 1.

[0036] S2: Carry out chemical looping combustion treatment on the pulverized solid waste. The chemical looping combustion temperature is 800°C-900°C. The chemical looping combustion uses oxygen carriers modified by adsorbents. The oxygen carrier is manganese ore, which is pulverized first. Manganese ore, and then obtain manganese ore particles with a particle size of 0.1mm to 0.3mm by sieving, using adsorbent K 2 CO 3 It is dissolved in deionized water for ultrasonic wet impregnation modification of manganese ore, and the frequency of ultrasonic wave is 10-50KHz. Lattice oxygen is used to complete solid waste incineration, condenses and captures carbon dioxide produced by chemical chain combustion, and adsorbs and fixes gaseous chlorine with adsorbents to achieve low-carbon emissions in waste treatment and inhibit the formation of dioxins. The ultrasonic wet impregnation process is a method of wet impregnation under ultrasonic waves, which hel...

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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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Patent Type & Authority Patents(China)
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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