Preparation method of flyash heavy metal immobilization medicament and application

A technology of heavy metals and agents, which is applied in the direction of protection devices against harmful chemicals, etc., can solve the problems of heavy metal leakage and other problems, and achieve the effect of low cost, high hardness and good economy

Inactive Publication Date: 2018-05-29
广州环投永兴集团股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to prepare a fly ash heavy metal immobilization agent to realize the comprehensive solidification of fly ash heavy metals, so as to overcome the problem of missed capture of individual heavy metals in the prior art

Method used

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  • Preparation method of flyash heavy metal immobilization medicament and application
  • Preparation method of flyash heavy metal immobilization medicament and application
  • Preparation method of flyash heavy metal immobilization medicament and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The material composition of the fly ash immobilization agent prepared in this example is shown in Table 1.

[0028] Table 1 The material composition of the fly ash immobilization agent prepared in Example 1

[0029]

[0030] The specific process of using the above materials to prepare the fly ash immobilization agent is as follows:

[0031] (1) Mix the above mass parts of pure water, CS 2 , sulfur, and dimethylamine solution with a mass fraction of 40%, were added to the reactor in sequence under stirring conditions, and the temperature of the system was controlled not to exceed 15°C, and stirred at a constant temperature for 0.5h;

[0032] (2) After the dropwise addition is completed, add the NaOH solution with a mass fraction of 40% dropwise at a constant speed, control the temperature during the dropwise addition not to exceed 18°C, and keep stirring for 1 hour after the dropwise addition is completed;

[0033] (3) The temperature of the reactor was raised to 40...

Embodiment 2~ Embodiment 5

[0040] In Examples 2 to 5, the preparation of the fly ash immobilization agent and field application test are the same as in Example 1, except that the material composition of the chelating agent is different. For the convenience of comparison among the examples, the material composition of the prepared chelating agent and the test results of fly ash immobilization in Examples 1 to 5 are listed together, see Table 2 and Table 3 for details.

[0041] Table 2 Composition of chelating agents (unit: parts by mass)

[0042]

[0043] Table 3 Comparison of heavy metal leaching effects of solidified blocks of raw ash and fly ash in Examples 1 to 5

[0044]

[0045] The test results listed in Table 3 show that the fly ash heavy metal immobilization agent prepared by the present invention, the heavy metal leaching concentration of its fly ash solidified block meets the technical requirements limited by the national standard, and reaches the national hazardous waste identification ...

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Abstract

The invention provides a preparation method of a flyash heavy metal immobilization medicament and application. A reaction system containing 0-5 parts of sulfur, 22-35 parts of carbon disulfide, 45 parts of NaOH solution with a mass fraction of 40%, 50 parts of dimethylamine solution with a mass fraction of 40% and 50 parts of water is adopted to obtain chelating medicament for capturing fixed flyash heavy metal and capable of forming stable mineralization structural bodies with the same. The medicament has the advantages of comprehensive and efficient capturing and reliable and stable curing,can effectively satisfy GB / T18772-2002, GB5085.3-2007 and GB16889-2008 standard specifications and meet the mineralization and solidification technical requirements of the heavy metal in garbage incineration flyash, and can be widely applied to harmless treatment of the heavy metal in the garbage incineration flyash and the resourceful recycling process of the heavy metal.

Description

technical field [0001] The invention specifically relates to a preparation method and application of a fly ash heavy metal immobilization agent, and belongs to the technical field of environmental functional materials. Background technique [0002] The domestic waste incineration power generation technology is a mature, stable and reliable practical technology. The waste incineration power generation technology maximizes the reduction of municipal solid waste, harmless and resourceful, and also takes into account the waste in municipal solid waste. The chemical energy conversion and utilization of organic substances have achieved the most reasonable technical, economic and social benefits. Therefore, waste incineration power generation technology has been widely used in many large-scale urban waste treatment and disposal practices in Europe, America, Japan and my country, and it is expected that waste incineration technology will develop rapidly in the next few years. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D3/33A62D101/43
CPCA62D3/33A62D2101/43
Inventor 陈玉放江小艳靳焘熊爱生马倩石峰罗跃张晶
Owner 广州环投永兴集团股份有限公司
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