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Fly ash leaching solution treatment method and system

A treatment method and a treatment system technology, which are applied in the field of fly ash leaching solution treatment method and its system, can solve problems such as fly ash leaching solution pollution, and achieve the effects of good water quality, low energy consumption, and simple process

Pending Publication Date: 2019-01-25
深圳能源资源综合开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method and system for treating waste incineration fly ash leaching solution. pollution problem

Method used

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  • Fly ash leaching solution treatment method and system
  • Fly ash leaching solution treatment method and system
  • Fly ash leaching solution treatment method and system

Examples

Experimental program
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Effect test

Embodiment 1

[0060] A method for treating fly ash leaching solution, comprising the following steps:

[0061] (1) Pass the fly ash leaching solution into the primary reaction tank, add hydrochloric acid to adjust its pH value to 10;

[0062] (2) After adjusting the pH value, lead the fly ash leaching solution to the secondary reaction pool, add a heavy metal chelating agent with a total weight of 0.08% of the fly ash leaching solution, stir slowly for 20 minutes, and carry out metal chelation reaction to produce metal chelate Precipitated particles;

[0063] (3) Lead the drenching solution in step (2) to the tertiary reaction tank, add flocculant, and stir slowly for 5 minutes, so that the precipitated particles of metal chelate are transformed into precipitated alum flower particles;

[0064] (4) Pass the mixed liquid in step (3) to the primary sedimentation tank, and let it settle for 2 hours to make it settle completely;

[0065] (5) Pass the supernatant in the first-stage sedimentati...

Embodiment 2

[0074] A method for treating fly ash leaching solution, comprising the following steps:

[0075] (1) Pass the fly ash leaching solution into the primary reaction tank, add hydrochloric acid to adjust its pH value to 10.5;

[0076] (2) After adjusting the pH value, lead the fly ash leaching solution to the secondary reaction tank, add a heavy metal chelating agent of 0.10% of the total weight of the fly ash leaching solution, stir slowly for 25 minutes, and carry out metal chelation reaction to produce metal chelate Precipitated particles;

[0077] (3) Lead the drenching solution in step (2) to the tertiary reaction tank, add flocculant, and stir slowly for 5 minutes, so that the precipitated particles of metal chelate are transformed into precipitated alum flower particles;

[0078] (4) Pass the mixed liquid in step (3) to the primary sedimentation tank, and let it settle for 2.5 hours to make it settle completely;

[0079] (5) Pass the supernatant in the first-stage sedimen...

Embodiment 3

[0088] A method for treating fly ash leaching solution, comprising the following steps:

[0089] (1) Pass the fly ash leaching solution into the primary reaction pool, and add hydrochloric acid to adjust its pH value to 8;

[0090] (2) After adjusting the pH value, pass the fly ash leaching solution to the secondary reaction tank, add a heavy metal chelating agent with a total weight of 0.12% of the fly ash leaching solution, stir slowly for 20-30 minutes, and carry out metal chelation reaction to produce metal chelation Compound precipitation particles;

[0091] (3) Lead the drenching solution in step (2) to the tertiary reaction tank, add flocculant, and stir slowly for 5 minutes, so that the precipitated particles of metal chelate are transformed into precipitated alum flower particles;

[0092] (4) Pass the mixed liquid in step (3) to the primary sedimentation tank, and let it settle for 2 hours to make it settle completely;

[0093] (5) Pass the supernatant in the first...

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Abstract

The invention discloses a fly ash leaching solution treatment method and system. The fly ash leaching solution treatment method comprises the following steps: adjusting the pH of a leaching solution to be 8 to 11 in a primary reaction tank, then feeding the leaching solution in various reaction tanks, separately adding a heavy metal chelating agent and a flocculating agent, generating alumen ustumparticles, standing, precipitating, adjusting the pH to 3 to 5, adding a Fenton reagent, standing, precipitating, introducing supernatant into a purification tank, purifying the supernatant, treatingby using a membrane treatment unit, thus obtaining reverse osmosis production water and a reverse osmosis concentrated solution, wherein the produced water is good in quality, the produced water is recyclable, evaporating and crystallizing the reverse osmosis concentrated solution by virtue of an evaporation unit, recycling salt substances, wherein the recycled salt substances can be used for producing industrial salt. The treated solution can be recycled, so that the zero emission of waste water can be realized; the crystal salt can be produced; the fly ash leaching solution treatment methodis an environment-friendly, safe and efficient treatment method, the environment pollution problem caused by the fly ash leaching solution produced after the garbage is incinerated can be solved, thesystem operation is simple, the equipment requirement is simple, and the system operation is reliable.

Description

technical field [0001] The invention relates to the technical field of sewage environmental protection treatment, in particular to a fly ash leaching solution treatment method and a system thereof. Background technique [0002] In today's society, with the substantial improvement of human productivity, the expansion of urban population and the continuous improvement of consumption capacity, the amount of production and domestic waste generated in cities is increasing, and the way to deal with production and domestic waste is mainly through direct filling. Landfill or waste disposal by incineration. Direct landfilling of waste will occupy too much land resources, while waste incineration can not only reduce the huge volume of waste, but also use the heat generated by burning waste to generate electricity. It is a more efficient and commonly used waste disposal method today. At present, incineration has become one of the main treatment methods of municipal solid waste. The a...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F101/20C02F103/06
CPCC02F9/00C02F1/04C02F1/001C02F1/66C02F1/722C02F1/725C02F1/5245C02F1/56C02F1/444C02F1/441C02F1/442C02F2103/06C02F2101/20C02F2001/007C02F2201/007C02F2301/08
Inventor 陈仁义赵剑锋兰建伟熊斌郑忆枫徐文军杨跃
Owner 深圳能源资源综合开发有限公司
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