Rubbish-fly-ash and cement-kiln cooperation treatment method

A technology of co-processing and garbage fly ash, applied in the direction of solid waste removal, etc., can solve problems such as market irregularities, vicious competition, and environmental hazards

Active Publication Date: 2015-11-25
浙江京兰环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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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  • Rubbish-fly-ash and cement-kiln cooperation treatment method
  • Rubbish-fly-ash and cement-kiln cooperation treatment method
  • Rubbish-fly-ash and cement-kiln cooperation treatment method

Examples

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Embodiment Construction

[0048] Examples, see attached Figure 1~6 , A method for co-processing garbage fly ash cement kiln, which includes the following process:

[0049] (1) Waste incineration fly ash tertiary water elution salt and microbial dioxin removal process;

[0050] (2) Bunch glue strengthens the heavy metal removal process;

[0051] (3) Nanofiltration process;

[0052] (4) Reverse osmosis pre-concentration process;

[0053] (5) Process for removing extremely trace impurities;

[0054] (6) MVR evaporation crystallization process.

[0055] The waste incineration fly ash tertiary water elution salt and microbial dioxin removal process includes the following steps: the process is completed by the waste incineration fly ash tertiary water elution salt and microbes dioxin removal device I.

[0056] a. Water washing: the waste incineration fly ash is blown from the fly ash storage 1 into the screw conveyor a2, enters the mixing tank a3 through the screw conveyor a, and a certain amount of water is added, and...

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Abstract

The invention relates to a rubbish-fly-ash and cement-kiln cooperation treatment method. The treatment method sequentially includes the technological steps of three-level washing desalting, and dioxin microorganism removing; heavy metal micellar-enhanced removing; nanofiltration; reverse osmosis pre-concentrating; slight-trace-carnallite removing; and MVR evaporative crystallization. Heavy metal and chloride ions in fly ash can be removed through the three-level washing desalting and dioxin microorganism removing technological step, and fly ash produced during dioxin microorganism erosion can be used as building materials. Heavy metal, most calcium and most magnesium in the fly ash can be removed through the heavy metal micellar-enhanced removing technological step, and precipitate is pre-dried to enter a cement kiln to be incinerated. The calcium and the magnesium left in washing water are removed through the nanofiltration technological step. The washing water can be concentrated to 6% to 8% through the reverse osmosis pre-concentrating technological step, and produced water can be used for washing. A slight trace of carnallite is removed through the slight-trace-carnallite removing technological step. Concentrated liquor is evaporated and separated to obtain industrial salt through the MVR evaporative crystallization technological step.

Description

Technical field: [0001] The invention relates to the processing technology field of incineration fly ash, and more specifically to a method for co-processing garbage fly ash in a cement kiln. Background technique: [0002] With the development of society and economy, the process of urbanization has intensified, and many large and medium-sized cities in my country have encountered the problem of "garbage siege". There are three ways of garbage disposal: landfill, incineration and composting. At present, our country's garbage disposal adopts landfilling as the main method, and composting and incineration as supplementary measures, which will occupy a lot of land resources. With the increase in land prices and the continuous improvement of urban environmental requirements, landfills have become no longer economical and safe, and more and more cities have begun to consider waste incineration. Incineration treatment can reduce the volume of municipal waste by 80-90%, and the waste re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00
Inventor 王中华刘宁生
Owner 浙江京兰环保科技有限公司
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