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Co-processing and water reclamation method for garbage fly ash through cement kiln

A technology for co-processing and garbage fly ash, applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage treatment, etc., can solve problems such as market irregularities, vicious competition, and environmental hazards

Active Publication Date: 2015-12-02
湖州京兰环保科技有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the cost of fly ash disposal is high
On the other hand, due to the unregulated market, inadequate supervision and vicious competition, the "fly ash" is in a state of "flying randomly".
If fly ash cannot be disposed of safely, it will be a great hidden danger to the environment

Method used

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  • Co-processing and water reclamation method for garbage fly ash through cement kiln
  • Co-processing and water reclamation method for garbage fly ash through cement kiln
  • Co-processing and water reclamation method for garbage fly ash through cement kiln

Examples

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Embodiment Construction

[0057] Examples, see attached Figure 1-7 , a waste fly ash cement kiln co-processing and water resource disposal method, which includes the following process:

[0058] (1) Tertiary water elution of waste incineration fly ash and microbial removal of dioxins;

[0059] (2) Glue strengthening process for removing heavy metals;

[0060] (3) nanofiltration process;

[0061] (4) Reverse osmosis pre-concentration process;

[0062] (5) Membrane distillation concentration process;

[0063] (6) The process of removing extremely trace impurities;

[0064] (7) MVR evaporation crystallization process.

[0065] The process of tertiary water elution of salt from waste incineration fly ash and microbial removal of dioxins includes the following steps: the process is completed by the device I for tertiary water elution of waste incineration fly ash and microbial removal of dioxins.

[0066] a. Water washing: waste incineration fly ash is blown from the fly ash storage 1 into the screw c...

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Abstract

The invention relates to a co-processing and water reclamation method for garbage fly ash through a cement kiln. The co-processing and water reclamation method for the garbage fly ash through the cement kiln includes a three-stage water washing desalination and microorganism dioxin removal process, a micellar-enhanced heavy metal removal process, a nanofiltration process, a reverse osmosis pre-concentration process, a membrane distillation concentration process, a trace carnallite removal process and a mechanical vapor recompression (MVR) evaporative crystallization process. Heavy metal and chloride ions in the fly ash can be removed through the three-stage water washing desalination and microorganism dioxin removal process, and the fly ash with the dioxin eroded by microorganisms can serve as building materials. Heavy metal, calcium and magnesium in the fly ash can be removed through the micellar-enhanced heavy metal removal process, and sediment is pre-desiccated and then enters the cement kiln to be combusted. Residual calcium and magnesium in washing water are removed through the nanofiltration process. The washing water can be concentrated to 6-8% through the reverse osmosis pre-concentration process, and produced water is reused. Chloride ions in a solution can be removed through the membrane distillation concentration process, and produced distilled water can be reused. Trace carnallite is removed through the trace carnallite removal process. Concentrated liquor is evaporated and separated through the MVR evaporative crystallization process, so that industrial salt is obtained.

Description

Technical field: [0001] The invention relates to the field of processing technology of incineration fly ash, and more specifically relates to a co-processing method of waste fly ash cement kiln and water resources treatment. Background technique: [0002] With the development of social economy and the intensification of urbanization process, many large and medium-sized cities in my country are troubled by "garbage siege". There are three ways of waste disposal: landfill, incineration and composting. At present, landfill is the main method of waste disposal in my country, supplemented by composting and incineration, which will occupy a large amount of land resources. With the rise of land prices and the continuous improvement of urban environmental requirements, garbage landfill has become uneconomical and safe, and more and more cities have begun to consider garbage incineration. Incineration treatment can reduce the volume of urban garbage by 80-90%, and the waste residue ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00C02F9/10
CPCY02A20/131B09B3/00B09B5/00C02F1/04C02F1/441C02F1/442C02F1/447C02F9/00
Inventor 王中华刘宁生
Owner 湖州京兰环保科技有限公司
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