Stabilized curing method for inorganic fluoride landfill type waste and application

A curing method and fluoride technology, applied in chemical instruments and methods, solid waste removal, transportation and packaging, etc., can solve the problems of poor anti-leaching performance of hazardous waste, affecting the effect of hazardous waste disposal, and unqualified leaching toxicity indicators. , to achieve the effect of good fluorine-fixing effect, saving production cost and wide application

Pending Publication Date: 2020-11-13
吉安创成环保科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above method has a certain solidification effect when dealing with low-content inorganic fluoride (leaching toxic inorganic fluoride concentration is less than 500mg / L, does not contain calcium fluoride) hazardous waste, but for higher content inorganic fluoride (leaching toxic inorganic fluoride Concentration of 1000-15000mg / L, without calcium fluoride) for hazardous waste, cement or slaked lime is used for solidification, and a large amount of strong alkaline cement and slaked lime need to be added, which not only increases the cost of the agent, but also causes the pH value of the solidified body to exceed the standard , the cured hazardous waste has poor leaching resistance, resulting in unqualified leaching toxicity indicators and affecting the disposal effect of hazardous waste

Method used

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  • Stabilized curing method for inorganic fluoride landfill type waste and application
  • Stabilized curing method for inorganic fluoride landfill type waste and application
  • Stabilized curing method for inorganic fluoride landfill type waste and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for stabilizing and solidifying inorganic fluoride landfill hazardous waste, comprising the following steps:

[0027] (1) Add 5 parts by weight of calcium chloride solution to the broken hazardous waste to obtain mixture A;

[0028] (2) Add 10 parts by weight of cement to mixture A to obtain mixture B;

[0029] (3) Add 1 part by weight of 5% phosphoric acid solution to mixture B to obtain mixture C.

[0030] (4) After the mixture C has been cured and all indicators meet the entry standards for landfill hazardous waste, it will be landfilled.

Embodiment 2

[0032] A method for stabilizing and solidifying inorganic fluoride landfill hazardous waste, comprising the following steps:

[0033] (1) Add 10 parts by weight of calcium chloride solution to the broken hazardous waste to obtain mixture A;

[0034] (2) Add 20 parts by weight of cement in mixture A to obtain mixture B;

[0035] (3) Add 1 part by weight of 5% phosphoric acid solution to mixture B to obtain mixture C.

[0036] (4) After the mixture C has been cured and all indicators meet the entry standards for landfill hazardous waste, it will be landfilled.

Embodiment 3

[0038] A method for stabilizing and solidifying inorganic fluoride landfill hazardous waste, comprising the following steps:

[0039] (1) Add 60 parts by weight of calcium chloride solution to the broken hazardous waste to obtain mixture A;

[0040] (2) in mixture A, add the cement of 50 parts by weight to obtain mixture B;

[0041] (3) Add 12.5 parts by weight of phosphoric acid solution to mixture B to obtain mixture C.

[0042] (4) After the mixture C has been cured and all indicators meet the entry standards for landfill hazardous waste, it will be landfilled.

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Abstract

The invention relates to a stabilized curing method for inorganic fluoride landfill type hazardous waste and application, and belongs to the field of stabilized curing of solid waste. The stabilized curing method for the inorganic fluoride hazardous waste comprises the following steps: adding calcium chloride solution into the hazardous waste subjected to crushing treatment; adding cement or slaked lime, and carrying out uniform mixing for curing; adding phosphoric acid solution for adjusting the pH value; and after maintenance and the landfill type hazardous waste admission standard is met, carrying out admission landfill treatment. The method can be used for stabilized curing of the inorganic fluoride hazardous waste, the situation that the pH is unqualified due to excessive addition ofa curing agent can be avoided, and the method has the advantages of good curing effect, high stability, wide application range and the like.

Description

technical field [0001] The invention relates to the field of solid waste stabilization and solidification, in particular to a stabilization and solidification method and application of inorganic fluoride landfill waste. Background technique [0002] During the production and disposal of fluorine-containing industrial wastewater, a large amount of hazardous waste containing inorganic fluoride, such as fluoride-containing sludge, will be produced. If these hazardous wastes are not properly treated, the fluoride ions in them will diffuse into drinking water, which will cause fluorosis , will cause serious damage to the teeth, bones and nervous system of the human body. [0003] In the hazardous waste disposal industry, landfill hazardous waste with a high content of inorganic fluoride is generally disposed of by curing first and then landfilling. The first step is to add an appropriate amount of cement or slaked lime to solidify. The second step is to cure the solidified hazar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B1/00
CPCB09B1/00B09B3/20
Inventor 叶树强胡国良章鹏兴肖信锦王艳萍
Owner 吉安创成环保科技有限责任公司
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