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A gelation and consolidation process of waste incineration fly ash

A technology for waste incineration fly ash and process, applied in the field of environmental engineering, can solve problems such as large differences, secondary pollution, and increased fly ash capacity, so as to promote sufficient mineralization reaction, promote sufficient mixing reaction, and ensure stability. effect of

Inactive Publication Date: 2011-11-30
武汉致衡环境安全工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the fly ash disposal process used by most waste incineration power plants is very rough and simple, especially the mixing process and molding process are quite different, resulting in very different conditions for the stabilization of heavy metal activity in fly ash
The ratio of fly ash, curing agent, stabilizer and water has excess water overflowing, and the formed fly ash block is easy to crack or has poor stability, causing serious secondary pollution and resulting in the quality of heavy metal stabilization of fly ash after treatment. and poor weather resistance
According to the test, the use of 40% cement at this stage not only increases the capacity of fly ash, but also 40% to 60% of it is waste of materials caused by improper technology.

Method used

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  • A gelation and consolidation process of waste incineration fly ash
  • A gelation and consolidation process of waste incineration fly ash

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Experimental program
Comparison scheme
Effect test

Embodiment example

[0035] The following is a further detailed description in conjunction with relevant implementation cases:

[0036] The heavy metal content of fly ash is shown in Table 1.

[0037] Table 1 Results of heavy metal leaching test of fly ash

[0038]

Embodiment example 1

[0040] Input the material parameters on the PLC console, and the radar material level control device and the PLC console will instruct the electric control valve to measure 300kg of fly ash and 45kg of cement. After the fly ash and cement are preliminarily mixed through the diverter valve, they enter the strong mixer and stir for 5 minutes. Put 0.6kg of amino strong basic heavy metal chelating resin and 90kg of water into the stabilizer storage bin and mix evenly to make a stabilizer solvent, then all the stabilizer solvent is added to a strong mixer through an atomizer and stirred for 25 minutes, and finally The mixed fly ash is extruded by a granulator, and the diameter of the small particles is 10mm-30mm. The formed fly ash particles are stored in a cool and dry curing room for 3-7 days, and the pellets are randomly selected according to the "Solid Waste Leaching The procedure in GB 5086.1-1997 to detect the leaching concentration of heavy metals in toxic leaching method fl...

Embodiment example 2

[0042]Input the material parameters on the PLC console, and the radar material level control device and the PLC console will instruct the electric control valve to measure 100kg of fly ash and 20kg of HAS curing agent. After the fly ash and HAS curing agent are preliminarily mixed through the diverter valve, they enter the strong mixer and stir for 5 minutes. Put 0.5kg of heavy metal chelating resin and 30kg of water into the stabilizer storage bin and mix evenly to make a stabilizer solvent, then add all the stabilizer solvent into a strong mixer through an atomizer and stir for 25 minutes, and finally mix the mixture The ash is extruded by a granulator, and the diameter of the small particles is 10mm to 30mm. The formed fly ash particles are stored in a cool and dry curing room for 3 to 7 days, and the small particles are randomly selected according to the "solid waste leaching and toxicity leaching method". Method "GB 5086.1-1997 and the procedures in the detection of its h...

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Abstract

The invention discloses a gelation and solidification process for waste incineration fly ash, which belongs to the field of environmental engineering. The gelation and consolidation process includes steps such as material backup, powder mixing, solid-liquid mixing, extrusion granulation, pellet curing, etc. After the fly ash and curing agent are measured, they are initially mixed through a diverter valve, and then mixed with a powerful mixer. The two are mixed evenly; the stabilizer is dissolved in water to make a solvent, which can ensure that the stabilizer and the mixed material are mixed evenly, thereby promoting the heavy metal capture more fully, which not only ensures the stabilization effect of the heavy metal in the fly ash; the stabilizer liquid Adding the atomizer to the powerful mixer can effectively control the amount of the stabilizer liquid, and promote the full mixing reaction of the mixed material and the stabilizer liquid. The concentration of heavy metals in the fly ash after treatment can meet the domestic garbage sanitary landfill. According to the requirements, it can be buried in sanitary landfill, which reduces the cost of fly ash treatment.

Description

technical field [0001] The invention discloses a gelation and solidification process for waste incineration fly ash, which belongs to the field of environmental engineering. Background technique [0002] With the rapid development of my country's economy, the composition of garbage is becoming more and more complex, the land resources are unprecedentedly tight, and the urgency of garbage reduction and disposal is very strong. The rise of a large number of waste incineration power plants has played a huge role in waste disposal and resource utilization, but at the same time, waste incineration produces a large amount of fly ash, especially the heavy metals and their compounds rich in fly ash, which are harmful to the health of urban residents. and ecological environment security pose a serious threat. Waste incineration fly ash is rich in heavy metals with high concentration and is easy to leach. It is regarded as hazardous waste and should be disposed of in hazardous waste ...

Claims

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Application Information

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IPC IPC(8): B09B3/00
Inventor 李璐胡竹云王惠芸高云云
Owner 武汉致衡环境安全工程技术有限公司
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