Temperature-sectioned efficient vitrification treatment method for sludge containing organic components

A disposal method, a technology of organic components, applied in sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem of fast ablation speed of refractory materials, high glass transition temperature, and unfavorable long-term stability of melting furnaces Operation and other issues

Pending Publication Date: 2020-09-04
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcoming of these prior art is, the vitrification temperature of wastes such as sludge is higher, stays in the melting furnace for a long time, and the ablation speed to the refractory material in the furnace is fast, and damages the melting furnace greatly, is unfavorable for the melting furnace Long-term stable operation

Method used

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  • Temperature-sectioned efficient vitrification treatment method for sludge containing organic components
  • Temperature-sectioned efficient vitrification treatment method for sludge containing organic components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Experimental conditions: with figure 1 The method is to weigh 200g of excess sludge with a moisture content of 70%, dry it to a moisture content of 40%, first burn it in an incinerator at 900°C for 30min, add 15g of 100-mesh quartz sand, and cosolvent B 2 o 3 2 g, mixed evenly, placed in a high-temperature melting furnace, kept at 1500°C for 15 minutes, and cooled with water to obtain a glass body. The fixation rates of heavy metals Zn, As and Ni in the sludge in the glass body reached 80%, 82% and 84%. In the vitreous leaching toxicity test, none of the inorganic elements involved in the GB 5085.3-2007 standard in the leaching solution exceeded the limit value in GB 5085.3-2007. Compared with the fixation rate of heavy metals in Comparative Example 1, the fixation rates of Zn, As and Ni elements were increased by 79.5%, 81.9% and 52%, respectively.

Embodiment 2

[0029] Experimental conditions: with figure 1 The method is to weigh 150g of oil sludge, first incinerate in an incinerator at 900°C for 45min, then add 15g of 100 mesh quartz sand, 3g of CaO, B 2 o 3 4 g, mixed evenly, placed in a high-temperature melting furnace, kept at 1500 ° C for 20 minutes, and cooled with water to obtain a glass body. The fixation rates of heavy metals Ti, V and Mn in the sludge in the glass body reached 98%, 96% and 93% respectively. %. In the vitreous leaching toxicity test, none of the inorganic elements involved in the GB 5085.3-2007 standard in the leaching solution exceeded the limit value in GB5085.3-2007. Compared with the fixation rate of heavy metals in Comparative Example 2, the fixation rates of Ti, V and Mn elements were increased by 13%, 9% and 8%, respectively.

Embodiment 3

[0033] Experimental conditions: with figure 1 The method is to weigh 200g of excess sludge with a moisture content of 70%, dry it to a moisture content of 20%, first incinerate at 900°C for 20min in an incinerator, and then add 15g of 100-mesh quartz sand, 4g of CaO, and B 2 o 38 g, mixed evenly, placed in a high-temperature melting furnace, kept at 1200°C for 10 minutes, and cooled with water to obtain a glass body. The fixation rates of heavy metals Zn, As and Ni in the sludge in the glass body reached 81%, 83% and 88%. In the vitreous leaching toxicity test, none of the inorganic elements involved in the GB 5085.3-2007 standard in the leaching solution exceeded the limit value in GB 5085.3-2007. Compared with the heavy metal fixation rate in Comparative Example 3, the fixation rates of Zn, As and Ni elements were increased by 80%, 82.4% and 48%, respectively.

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Abstract

Sludge containing organic components generated in the industrial production process is huge in annual output, most of the sludge is hazardous waste, and thorough harmless treatment of the sludge is ofgreat significance to benign development of the environment. The invention discloses a temperature-sectioned efficient vitrification treatment method for the sludge containing organic components. Themethod is characterized in that the sludge containing organic components is used as a treatment object and is subjected to incineration, pyrolysis or gasification at a temperature of 750-1100 DEG C at first, then quartz sand, SiO2, CaO, B2O3 and the like are added into residues (including ash residues, fly ash and the like) of the sludge, and a vitrification reaction is carried out at the temperature of 1100-1500 DEG C so as to allow the sludge to form a vitreous body. Inorganic harmful substances such as heavy metal elements in the sludge are immobilized by utilizing the vitreous body, so the purpose of harmlessness is achieved.

Description

technical field [0001] The invention belongs to the field of sludge treatment, and in particular relates to a temperature-sectioned high-efficiency vitrification treatment method for sludge containing organic components. Background technique [0002] Sludge containing organic components, such as excess sludge produced in the sewage treatment process of chemical and other enterprises, waste paint or paint residue produced in shipbuilding and vehicle manufacturing enterprises, and oil sludge produced in oil fields and oil refining enterprises, etc., because the sludge contains oil, organic Chemicals or heavy metals etc. are identified as hazardous waste and must be disposed of effectively. At present, there are two main disposal methods for this kind of sludge: landfill disposal and hazardous waste or general solid waste incineration disposal. Waste landfills are gradually banned from approval because they do not meet the long-term development needs of society, and there are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B5/235C03B5/16C03C6/04C03C6/00C02F11/10C02F11/00F23G7/00C02F101/10C02F101/20
CPCC03C1/002C03B5/235C03B5/16C02F11/10C02F11/00F23G7/001C02F2303/06C02F2101/20C02F2101/206C02F2101/103F23G2209/12
Inventor 郭磊
Owner QINGDAO UNIV
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