Stabilizing treatment method preventing heavy metal from dissolving from powder

A technology for stabilizing treatment and heavy metals, which can be applied in the direction of protection devices against harmful chemicals, which can solve the problem of high treatment costs and achieve the effect of excellent safety.

Active Publication Date: 2014-08-27
KURITA WATER INDUSTRIES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there is a problem of high

Method used

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  • Stabilizing treatment method preventing heavy metal from dissolving from powder
  • Stabilizing treatment method preventing heavy metal from dissolving from powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0078] Sample 1: Dust KT discharged from municipal waste incinerators

[0079] Sample 2: Dust DT discharged from municipal waste incineration plants

[0080] The composition analysis results of dust KT and dust DT are shown in Table 1.

[0081] Table 1 Component analysis results

[0082] Analysis Project

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PUM

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Abstract

The invention relates to a stabilizing treatment method preventing heavy metal from dissolving from powder. An incineration device of common wastes or industrial wastes serves as an object; after acid gas generated by the object device is treated through quick lime and/or slaked lime, alkaline powder with remaining quick lime and/or slaked lime and with the acid consumption of 250mg-CaCO3/g-powder is independently treated through an inorganic phosphoric acid heavy metal fixing agent or treated through the inorganic phosphoric acid heavy metal fixing agent and a neutralizer, and accordingly the heavy metal is prevented from dissolving from the powder. According to the value of acid consumption, a proper necessary addition quantity of the inorganic phosphoric acid heavy metal fixing agent and the neutralizer is determined.

Description

technical field [0001] The present invention relates to a stabilization treatment method for preventing heavy metals from leaching from dust. In order to stabilize heavy metals in dust generated from incineration equipment for general waste or industrial waste, heavy metal fixatives are used, which can be added in an appropriate amount. Treatment is a method that can make heavy metals harmless for a long time. In particular, it can stably process heavy metals according to the People's Republic of China HJT300-2007 solid waste leaching toxicity leaching method acetate buffer solution method or the US EPA method 1311TCLP method. Use the heavy metal fixative to treat the dust harmlessly, which can be landfilled. Background technique [0002] As conventional technologies, the following technologies can be cited: [0003] 1) For dust, generally add a certain amount of cement and water, after a certain period of curing, the cement is solidified, and the method of enclosing heavy...

Claims

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Application Information

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IPC IPC(8): A62D3/33A62D101/43A62D101/08
Inventor 水品恵一
Owner KURITA WATER INDUSTRIES LTD
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