Cooperative treatment method for waste incineration fly ash and copper-containing sludge

A technology for waste incineration fly ash and co-processing, applied in the direction of improving process efficiency, can solve the problems of ineffective recovery of valuable components, difficulty in enrichment, and damage to the surrounding ecological environment, and achieve environmentally friendly production and applicability. Strong, anti-corrosion effect

Active Publication Date: 2021-05-14
湖南锐异资环科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the increasing amount of garbage, the increasing shortage of land resources, and the inability to effectively recycle valuable components in domestic waste, the heat treatment process of domestic waste has gradually become the mainstream.
However, in the process of waste incineration, a large amount of secondary pollutants will also be produced, such as exhaust gas, fly ash, etc.
According to the data, the generation of fly ash accounts for about 3-5% of the amount of incinerated waste. Due to the large base of waste incineration, the amount of incineration fly ash produced every year has reached a scale that cannot be ignored. The dioxin contained in the fly ash And the high chlorine content has als

Method used

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  • Cooperative treatment method for waste incineration fly ash and copper-containing sludge
  • Cooperative treatment method for waste incineration fly ash and copper-containing sludge
  • Cooperative treatment method for waste incineration fly ash and copper-containing sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] The co-processing method of the waste incineration fly ash and copper-containing sludge of the present embodiment comprises the following steps:

[0093] S1. Mix the waste incineration fly ash and copper-containing sludge evenly at a mass ratio of 5:1, and make pellets to obtain pellets (high-chloride, low-copper-nickel mixture);

[0094] Among them, the waste incineration fly ash contains 18wt% of chlorine, 3wt% of water, and the content of copper and nickel is less than 1wt%; the copper-containing sludge contains 3.4wt% of copper, 1.2wt% of nickel, 60wt% of water, and the chlorine content is <1wt% %;

[0095] S2, mixing the pellets, flux and fuel obtained in S1 to obtain a mixture;

[0096] Wherein, in the mixture, SiO 2 , The mass ratio of Fe is 0.7:1, SiO 2 , the mass ratio of CaO is 0.9:1; every 1kg of pellets is mixed with fuel with 1600kcal of heat; the amount of coke added is 21wt% of the pellets;

[0097] S3. Smelting the mixture obtained in S2 to obtain mo...

Embodiment 2

[0104] The co-processing method of the waste incineration fly ash and copper-containing sludge of the present embodiment comprises the following steps:

[0105] S1. Mix the waste incineration fly ash and copper-containing sludge evenly at a mass ratio of 3:1, and make pellets to obtain pellets (high-chloride, low-copper-nickel mixture);

[0106] Among them, the waste incineration fly ash contains 21wt% of chlorine, 2wt% of water, and the content of copper and nickel is less than 1wt%; the copper-containing sludge contains 2.7wt% of copper, 0.6wt% of nickel, 50wt% of water, and the chlorine content is <1wt% %;

[0107] S2, mixing the pellets, flux and fuel obtained in S1 to obtain a mixture;

[0108] Wherein, in the mixture, SiO 2 , The mass ratio of Fe is 0.75:1, SiO 2 1. The mass ratio of CaO is 0.85:1; every 1kg of pellets is mixed with fuel with 1200kcal of heat; the fuel contains coke; the amount of coke added is 21wt% of the pellets;

[0109] S3. Smelting the mixture ...

Embodiment 3

[0116] The co-processing method of the waste incineration fly ash and copper-containing sludge of the present embodiment comprises the following steps:

[0117] S1. Mix the waste incineration fly ash and copper-containing sludge evenly at a mass ratio of 2:5, and make pellets to obtain pellets (low-chlorine, high-copper-nickel mixture);

[0118] Among them, waste incineration fly ash contains 6wt% chlorine, 2wt% water, and both copper and nickel contents are less than 1wt%; copper-containing sludge contains 4.1wt% copper, 1.3wt% nickel, 30wt% water, and chlorine content <1wt% %;

[0119] S2, mixing the pellets, flux and fuel obtained in S1 to obtain a mixture;

[0120] Wherein, in the mixture, SiO 2 , The mass ratio of Fe is 0.8:1, SiO 2 1. The mass ratio of CaO is 1:1; every 1kg of pellets is mixed with fuel with 1400kcal of heat; the fuel contains coke; the amount of coke added is 21wt% of the pellets;

[0121] S3. Smelting the mixture obtained in S2 to obtain molten sla...

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Abstract

The invention relates to a cooperative treatment method for waste incineration fly ash and copper-containing sludge. The waste incineration fly ash and the copper-containing sludge are mixed uniformly and pelleted to obtain a ball material; the ball material, a fluxing agent and fuel are mixed to obtain a mixture; smelting is carried out to obtain molten slag and smoke; when the ball material is a high-chlorine material, the molten slag is subjected to water quenching, and glass tailings are obtained; soot in the smoke is collected, the soot is sequentially subjected to water washing and solid-liquid separation, supernatant is obtained, then alkali is added into the supernatant, and sediment rich in copper and nickel is obtained; and when the ball material is a low-chlorine material, dilution treatment is carried out on the molten slag to obtain a slag phase and matte, and then water quenching is carried out on the slag phase to obtain glass tailings. In the invention, a binder does not need to added for pelleting in the treatment of the waste incineration fly ash, additional drying equipment does not need to be added in the treatment of the copper-containing sludge, and the two materials are co-treated, so that the process flow and the investment cost are greatly reduced.

Description

technical field [0001] The invention relates to a method for synergistic treatment of waste incineration fly ash and copper-containing sludge, and belongs to the technical field of harmless and resourceful comprehensive disposal of hazardous waste. Background technique [0002] There are currently three main disposal methods for domestic waste: (1) cement solidification landfill, (2) chemical agent stabilization technology, and (3) heat treatment technology. However, due to the increasing amount of garbage, the increasing shortage of land resources, and the inability to effectively recycle valuable components in domestic waste, the heat treatment process of domestic waste has gradually become the mainstream. However, in the process of waste incineration, a large amount of secondary pollutants will also be produced, such as exhaust gas and fly ash. According to the data, the generation of fly ash accounts for about 3-5% of the amount of incinerated waste. Due to the large ba...

Claims

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Application Information

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IPC IPC(8): C22B1/24C22B7/00C22B23/02C22B15/00C04B18/02
CPCC22B1/2406C22B7/002C22B23/02C22B15/0028C04B18/023Y02P10/20
Inventor 彭红葵张力攀张立李琛梁超韩旭谢龙臣罗健龙森周佳佳顾佳顺
Owner 湖南锐异资环科技有限公司
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