Efficient dechlorinating agent, dechlorinating method and device for waste incineration fly ash

A waste incineration fly ash and dechlorination agent technology, applied in the field of dechlorination, can solve the problems of incineration fly ash containing chlorine, few applications, immature technology of incineration fly ash resource utilization, etc., and achieve less washing water consumption and high migration efficiency high effect

Active Publication Date: 2020-06-12
广州派安环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the disposal of incineration fly ash is mainly to use immobilization technology or stabilization technology, and then enter the hazardous waste landfill for landfill disposal; or carry out safe landfill disposal, which is to simply process the incineration fly ash on site. , sent to a safe landfill for safe landfill disposal, but the construction and operation costs of a safe landfill are extremely high, making it unbearable for waste incineration plants, so the use of this method will gradually decrease
[0006] The recycling technology of incineration fly ash has also received some research, such as wet chemical treatment technology, the preparation of glass ceramic products for building materials, etc., but the recycling technology of incineration fly ash is not yet mature, so it is rarely used
The main problem is that incineration fly ash contains chlorine and heavy metals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) The fly ash sting collector is used to capture the heavy metals in the fly ash and mix them with the heavy metals in the fly ash in water to form water-insoluble heavy metal stings, and the concentration of heavy metals that can be leached in the test is stable and up to the standard . The composition of such substances includes aminodithioformate resin (DTCR), EP110, polyethylene polyamine, organophosphate HEDP compound, etc., the addition amount is 2%, and the encapsulation and curing time are 30 minutes respectively.

[0042](2) The fly ash treated with high-efficiency chelating collectors is washed with dechlorination agent. The ratio of high-efficiency dechlorination agent is 2 parts by weight of sodium nitrate, 2 parts by weight of ammonium phosphate, 2 parts by weight of sulfamic acid, lemon 0.5 parts by weight of acid, 2 parts by weight of oxalic acid, 2 parts by weight of tartaric acid, 2 parts by weight of polyphosphoric acid, the addition amount is 4% of ...

Embodiment 2

[0047] (1) The fly ash sting collector is used to capture the heavy metals in the fly ash and mix them with the heavy metals in the fly ash in water to form water-insoluble heavy metal stings, and the concentration of heavy metals that can be leached in the test is stable and up to the standard . The composition of such substances includes aminodithioformate resin (DTCR), EP110, polyethylene polyamine, organophosphate HEDP compound, etc., the addition amount is 2%, and the encapsulation and curing time are 30 minutes respectively.

[0048] (2) The fly ash treated with high-efficiency chelating collectors is washed with dechlorination agent. The ratio of high-efficiency dechlorination agent is 3 parts by weight of sodium nitrate, 3 parts by weight of ammonium phosphate, 3 parts by weight of sulfamic acid, lemon 0.6 parts by weight of acid, 3 parts by weight of oxalic acid, 3 parts by weight of tartaric acid, and 4 parts by weight of polyphosphoric acid. The upper cathode carbo...

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PUM

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Abstract

The invention relates to an efficient dechlorinating agent for waste incineration fly ash. The dechlorinating agent is prepared from one or more of nitrate, phosphate, organic acid and phosphoric acid. The invention also relates to a dechlorination method and a dechlorination device. According to the method, the principle of electrochemical ion migration is utilized, the efficient dechlorinating agent beneficial to enhancing the migration efficiency of chloride ions in the waste fly ash is added in the process of washing the waste incineration fly ash, and an electric field device specially designed on site is added, so that the liquid/solid ratio is lower, the water consumption for washing is less, and the desorption and migration efficiency of the chloride ions in the fly ash is higher in the process of washing the chloride ions in the waste fly ash, thus achieving the effect of efficiently removing chlorine salt from incineration fly ash.

Description

technical field [0001] The invention relates to a high-efficiency dechlorination agent for waste incineration fly ash, and also relates to a dechlorination method. Furthermore, the present invention also relates to a dechlorination device. Background technique [0002] Incineration fly ash is produced during the incineration of municipal solid waste. During the incineration process of waste, the organic matter in the waste is mainly discharged in the form of gaseous matter; while the inorganic matter is mainly formed into solid particles, of which the larger particles are deposited in the incinerator. The bottom and the grate are called bottom ash, and those fine particles float in the flue gas and enter the flue gas purification system together with the flue gas. These particles constitute 50% of the incineration fly ash, and the remaining incineration fly ash The ash comes from the limestone or activated carbon added during the flue gas purification process. They are coll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00
CPCB09B5/00B09B3/80B09B2101/30
Inventor 郭荣
Owner 广州派安环保科技有限公司
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