Treatment method for synergistically solidifying waste incineration fly ash and evaporation concentrated solution obtained after waste membrane treatment

A technology for incinerating fly ash and evaporating concentrated liquid from waste is applied in chemical instruments and methods, multi-stage water/sewage treatment, heating water/sewage treatment, etc. Achieve the effect of solving the problem of secondary pollution, reducing the processing burden and solving the problem of insufficient strength

Active Publication Date: 2021-06-29
HUNAN JUNXIN ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (3) There are many curing auxiliary materials added, the process is complicated, and the volume expansion ratio is large;
[0008] (4) The mother liquor formed after the concentrated solution is highly concentrated again by membrane method or evaporation contains high concentration of salts, which can easily cause the solidified body to rupture, increase permeability, and reduce cement strength;
[0009] (5) Only focus on the leaching of heavy metals, without considering the problem that after the waste film treatment, the evaporated concentrated solution is co-cured to form a module, and the salt and COD of the evaporated concentrated solution inside the module will still be leached in large quantities

Method used

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  • Treatment method for synergistically solidifying waste incineration fly ash and evaporation concentrated solution obtained after waste membrane treatment
  • Treatment method for synergistically solidifying waste incineration fly ash and evaporation concentrated solution obtained after waste membrane treatment
  • Treatment method for synergistically solidifying waste incineration fly ash and evaporation concentrated solution obtained after waste membrane treatment

Examples

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Effect test

Embodiment 1

[0038] A treatment method for co-solidifying waste incineration fly ash and evaporated concentrate after waste film treatment, comprising the following steps:

[0039] (1) Evaporating and concentrating the waste with a water content of 90% after membrane treatment, performing centrifugal dehydration and low-temperature drying until the water content drops to 35% to 40%, to obtain a mother liquor. TDS in this mother liquor is 600,000 mg / L.

[0040](2) According to the amount of asphalt being 1% of the weight of waste incineration fly ash, place the asphalt in mixer A and heat at 100°C until a paste-like asphalt is formed, stir for 5 minutes, and add the mother liquor obtained in step S1 (the amount of mother liquor is 12.5% ​​of the weight of waste incineration fly ash), and stirred for 20 minutes until the asphalt wraps 95% of the mother liquor to form a slurry mixture.

[0041] According to the amount of the curing agent being 17.5% of the weight of the waste incineration fl...

Embodiment 2

[0048] A treatment method for co-solidifying waste incineration fly ash and evaporated concentrate after waste film treatment, comprising the following steps:

[0049] (1) According to the amount of pitch being 1% of the weight of the waste incineration fly ash, the pitch is placed in the A mixer and heated at 100°C until it forms a paste pitch, stirred for 5 minutes, and added the mixture obtained in Example 1 The mother liquor (the amount of the mother liquor is 11.1% of the weight of the waste incineration fly ash) was stirred for 20 minutes until the bitumen covered 95% of the mother liquor to form a slurry mixture.

[0050] According to the amount of the curing agent being 18.9% of the weight of the waste incineration fly ash, the waste incineration fly ash and the curing agent (specifically, sulphoaluminate cement) were mixed in the B mixer and stirred for 5 minutes to form a solid mixture.

[0051] (2) The slurry mixture obtained in step (1) is added to the solid mixtur...

Embodiment 3

[0057] A treatment method for co-solidifying waste incineration fly ash and evaporated concentrate after waste film treatment, comprising the following steps:

[0058] (1) According to the amount of pitch being 1% of the weight of the waste incineration fly ash, the pitch is placed in the A mixer and heated at 100°C until it forms a paste pitch, stirred for 5 minutes, and added the mixture obtained in Example 1 The mother liquor (the amount of the mother liquor is 10% of the weight of the waste incineration fly ash) was stirred for 20 minutes until the bitumen covered 95% of the mother liquor to form a slurry mixture.

[0059] According to the amount of the curing agent being 20% ​​of the weight of the waste incineration fly ash, the waste incineration fly ash and the curing agent (specifically sulphoaluminate cement) were mixed in the mixer B, and stirred for 5 minutes to form a solid mixture.

[0060] (2) The slurry mixture obtained in step (1) is added to the solid mixture ...

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Abstract

The invention discloses a treatment method for synergistically solidifying waste incineration fly ash and an evaporation concentrated solution obtained after waste membrane treatment. The method comprises the following steps: reducing the water content of the evaporation concentrated solution obtained after film treatment of waste to 35-40% to obtain a mother solution; heating asphalt to form pasty asphalt, adding the mother liquor, and stirring to form a pasty mixture; mixing the waste incineration fly ash with a curing agent, and stirring to form a solid mixture; mixing the slurry mixture with the solid mixture, adding an additive, a heavy metal chelating agent and water, and stirring to obtain a mixed material; and putting the obtained mixed material into a mold, standing and maintaining to form a solidified body. The treatment method has the advantages that auxiliary materials are simple and easy to obtain, the cost is low, the process is simple, operation is convenient, the curing effect is good, the reduction effect is good and the like, the problem of final treatment of the evaporation concentrated solution and the waste incineration fly ash after waste membrane treatment can be effectively solved, and the treatment method has very high use value and application prospects.

Description

technical field [0001] The invention relates to a processing method for synergistically solidifying waste incineration fly ash and evaporated concentrated liquid after waste film treatment, in particular to a treatment method for cooperative chelation and solidification of waste incineration fly ash and evaporated concentrated liquid after waste film treatment. Background technique [0002] In the process of garbage incineration, the organic matter in the garbage is mainly discharged in the form of gaseous substances; while the inorganic matter mainly forms solid particles, and some fine particles settle down at the bottom of the flue and chimney. These fine particles that are captured and settled Particulate matter is known as waste incineration fly ash. During the municipal solid waste incineration process, the quantity of waste incineration fly ash can reach 2-4% of the total mass of waste. Waste incineration fly ash often contains high concentrations of heavy metals, su...

Claims

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Application Information

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IPC IPC(8): A62D3/33C02F9/10A62D101/08A62D101/20A62D101/43C02F103/06
CPCA62D3/33C02F1/38C02F1/04A62D2101/08A62D2101/20A62D2101/43C02F2103/06
Inventor 孙浩刘李柱李方志肖冬杰周俊田黎黎刘波
Owner HUNAN JUNXIN ENVIRONMENTAL PROTECTION CO LTD
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