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Method and system for disposing incineration fly ash of household garbage

A technology for incineration and treatment of domestic waste, applied in chemical instruments and methods, solid waste removal, transportation and packaging, etc., can solve the problem of not ensuring the re-entry of heavy metals into the environment, and achieve significant economic benefits and environmental protection effects, treatment methods Simple, cost- and land-use reduction effects

Inactive Publication Date: 2016-02-17
CHINA TIANYING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of these methods only temporarily solidify and stabilize the toxic and harmful substances in fly ash, an

Method used

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  • Method and system for disposing incineration fly ash of household garbage

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] Example 1:

[0035] like figure 1 As shown, the present invention includes a first fly ash storage pit 1, the first fly ash storage pit 1 is connected with a first fly ash storage bin 3 through a hoist 2, and the first fly ash storage bin 3 is connected to an electric motor through a fly ash conveyor 4. The vibrating screen 5 is connected, and the small particle size fly ash output port of the electric vibrating screen 5 is connected to the second fly ash storage bin 7 through the small particle size fly ash conveyor 6, and the second fly ash storage bin 7 passes through the fly ash screw feeder. 8 is connected with the fly ash input port of the mixer 9, the mixer 9 also includes a cement input port and a chelating agent input port, and the cement input port of the mixer 9 passes through the cement screw feeder 10 and the output of the cement storage bin 11. The chelating agent input port of the mixer 9 is connected with the output end of the chelating agent solution t...

Example Embodiment

[0056] Embodiment 2:

[0057] The processing architecture and processing steps of this embodiment are the same as those of the first embodiment, and there are only differences in parameters:

[0058] In step 2), the moisture content of the original fly ash is 10%, and the aperture size of the vibrating screen is 45 μm.

[0059] Step 3) The mass ratio of small and medium-sized fly ash to cement is 10:1.

[0060] In step 5), the curing time on the horizontal endless conveyor is 1h.

[0061] Step 8) The mass ratio of medium and large particles of fly ash to the aqueous solution is 1:10, and the number of repeated washings is 5 times.

[0062] After the treatment in this example, the removal rate of chlorine element and heavy metals in the large particle fly ash separated from the household waste incineration fly ash can reach 85.09%, and the leaching property of the waste incineration fly ash reaches the standard.

Example Embodiment

[0063] Embodiment three:

[0064] The processing architecture and processing steps of this embodiment are the same as those of the first embodiment, and there are only differences in parameters:

[0065] In step 2), the moisture content of the original fly ash is 25%, and the aperture size of the vibrating screen is 70 μm.

[0066] Step 3) The mass ratio of small and medium-sized fly ash to cement is 15:1.

[0067] In step 5), the curing time on the horizontal endless conveyor is 2h.

[0068] Step 8) The mass ratio of medium and large particles of fly ash to the aqueous solution is 1:15, and the number of repeated washings is 5 times.

[0069] After the treatment in this embodiment, the removal rate of chlorine element and heavy metals in the large particle fly ash separated from the household waste incineration fly ash can reach 90.75%, and the leaching property of the waste incineration fly ash reaches the standard.

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Abstract

The invention relates to a method and system for disposing incineration fly ash of household garbage, and relates to the field of research of innoxious disposal, reducing and recycling of incineration fly ash of household garbage. Fly ash is screened into large-particle fly ash and small-particle fly ash through wet screening, and then fixed stabilization, maintenance and landfilling are carried out on the small-particle fly ash; washing and solid-liquid separation are carried out on the large-particle fly ash, sedimentation of heavy metal is carried out on liquid, landfilling is carried out on the heavy metal in the liquid, and the liquid evaporates and is reutilized; and drying, extrusion pelleting and maintenance are carried out on solids for resource reutilization. The fly ash is disposed through the technical means of washing, solidification stabilization and resource recycling, so that the heavy metal in the fly ash is stabilized, and part of harmless fly ash residues and chlorine salt are recycled. The system and method for disposing incineration fly ash are simple, the effect of removing chloridion and heavy metal of the fly ash is remarkable, and the fly ash landfilling cost and occupied land are reduced; and disposed ceramic particles and fly ash residues can be recycled, and the remarkable economic benefits and the environment protection function are achieved.

Description

technical field [0001] The invention relates to the research fields of harmless, reduction and resource utilization of domestic waste incineration fly ash. Background technique [0002] With the continuous development of my country's urbanization and people's living standards, the generation of municipal solid waste has increased year by year, with an average annual rate of about 9% rapid increase. Traditional landfills occupy a large amount of land resources and cause a series of pollution problems such as groundwater and the atmosphere; composting has the problems of long processing cycle and high content of heavy metals in composting products. At the same time, incineration treatment can maximize the overall goal of harmless, stabilized, reduced, and resourceful waste, with high efficiency and high energy utilization. [0003] At present, developed countries such as Japan, the United States, Germany, Switzerland, Sweden, and Canada have adopted waste incineration as one ...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00
CPCB09B3/00B09B5/00B09B2101/30
Inventor 邓鸿雁苏明舟李军陈竹严圣军
Owner CHINA TIANYING
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