Method for treating waste incineration flue gas by using phosphate

A technology for incinerating flue gas and waste, applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of rising equipment investment and operating costs, increasing fly ash treatment equipment, etc.

Inactive Publication Date: 2010-01-13
SHANGHAI SUS ENVIRONMENT +1
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

Due to the increase of fly ash treatment equipment and the addition of chemicals for heavy metal treatment, equipment investment and operating costs have increased

Method used

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  • Method for treating waste incineration flue gas by using phosphate

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Embodiment

[0019] To waste incineration flue gas (flue gas flow rate 30,000m 3 / h-wet) into the exhaust flue, spray sodium phosphate or a mixture of sodium phosphate and calcium phosphate. Measure the content of sulfur oxides, hydrogen chloride and dioxin in the flue gas at the outlet of the dust collector, and measure the dissolution of heavy metals in the fly ash collected by the dust collector.

[0020] Change the injection amount and injection position of phosphate to achieve different treatment effects. And the original flue gas treatment method, that is, spraying calcium hydroxide and activated carbon into the flue gas, was taken as a comparative example.

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Abstract

The invention relates to a method for treating waste incineration flue gas by using mixture containing phosphate, comprising: the incineration flue gas with the temperature of below 800 DEG C is sprayed with the mixture containing the phosphate, and the spray quantity is 0.1-10g / Nm<3> of flue gas; the mixture is contacted with the flue gas for reaction, so that the content of oxysulphide, hydrogen chloride and dioxin as well as the dissolving out quantity of heavy metal can be effectively reduced. Compared with the original flue gas purification method, the method has the characteristics of simple technique, low cost, little medicament dosage, remarkable effect, etc.

Description

technical field [0001] The invention relates to a method for reducing the content of sulfur oxides, hydrogen chloride, dioxin and the amount of dissolved heavy metals in flue gas produced during waste incineration. Background technique [0002] The flue gas produced during the incineration of domestic garbage, medical waste, industrial waste, and sewage sludge contains pollutants such as sulfur oxides, hydrogen chloride, dioxins, and heavy metals. cause environmental pollution. [0003] In order to reduce the pollutants in the incineration flue gas, the original method is to spray calcium hydroxide or sodium bicarbonate and activated carbon into the flue gas. The principle is that sulfur oxides and hydrogen chloride are acidic, and alkaline calcium hydroxide Or sodium bicarbonate undergoes a neutralization reaction to generate compounds such as calcium chloride, calcium sulfate, sodium chloride and sodium sulfate, which are removed; activated carbon has a large specific sur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/74B01D53/50B01D53/68B01D53/72
Inventor 龙吉生朱晓平白力邓小福梁怡侃瞿兆舟李军川岛正毅藤本秀夫
Owner SHANGHAI SUS ENVIRONMENT
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