A method for dechlorinating ash by using garbage

A kind of ash and garbage technology, which is applied in the direction of recycling technology, solid waste removal, waste treatment, etc., can solve the problems of inability to realize ash treatment and consumption, limit the amount of ash utilization, etc., and achieve efficient resource utilization, Reduced mass consumption and low operating costs

Inactive Publication Date: 2011-12-28
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the existence of insoluble chlorine in the ash limits the utilization of the ash in the cement factory, and cannot realize the treatment and absorption of the ash in the true sense.

Method used

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  • A method for dechlorinating ash by using garbage
  • A method for dechlorinating ash by using garbage
  • A method for dechlorinating ash by using garbage

Examples

Experimental program
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Effect test

Embodiment 1

[0039] (1) Sorting the ash to make the particle size less than 2cm, sorting and magnetic separation to remove metal and plastic, select the garbage that has been buried for 5-6 years, and remove the plastic, metal, large stones, wood, etc., so that Its particle size is less than 10cm;

[0040] (2) The above-mentioned ash and old garbage are uniformly mixed in the desalination tank at a mass ratio of 9:1;

[0041] (3) Install a rinsing cloth pipe above the desalination tank, and regularly rinsing the desalination tank every day. According to the calculation of Shanghai’s annual average rainfall of 1178.2mm in the past five years, the rinsing water volume is 6.5mm / day, and the rinsing cycle is 30 weeks .

[0042] A leachate collection pipe is installed at the bottom, and ash residue and leachate are regularly sampled and analyzed. The specific structure and size of the desalination tank and water distribution system are as follows: Figure 2-5 shown. Use AQF-ion chromatograp...

Embodiment 2

[0046] (1) Sorting the ash and slag to make the particle size less than 2cm, remove the metal and plastic, select the garbage that has been landfilled for 5-6 years, and remove the plastic, metal, large stones, wood blocks, etc., so that the particle size is less than 10cm ;

[0047] (2) The above-mentioned ash and old garbage are uniformly mixed in the desalination tank at a mass ratio of 19:1;

[0048] (3) Install a rinsing cloth pipe above the desalination tank, and regularly rinsing the desalination tank every day. According to the calculation of the annual average rainfall of 1178.2mm in Shanghai in the past five years, the rinsing water volume is 6.5mm / day, and the rinsing cycle is 50 weeks .

[0049] A leachate collection pipe is installed at the bottom, and ash residue and leachate are regularly sampled and analyzed.

[0050] figure 1 Shown is the reaction mechanism of using garbage to dechlorinate ash in the present invention.

[0051] The specific structure of th...

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Abstract

The invention belongs to the technical field of environmental protection, and relates to a method for dechlorination of ash by using garbage. The method comprises the following steps: firstly, respectively carrying out pretreatments for ash and garbage; then mixing the pretreated garbage and the pretreated ash according to a certain ratio; finally, carrying out regular water spraying for the resulting mixture. With the method provided by the present invention, the total chlorine content and the total heavy metal content in the ash are substantially reduced, such that the standard and the requirement of the resource utilization of the cement are met in a relatively short time. According to the present invention, the process is simple; the operation cost is low; disadvantages of large amount of water resource consuming and low removal efficiency of insoluble chlorine in the traditional washing process can be overcome; large consumptions of the non-renewable resources such as limestone and clays are reduced, efficient resource utilization of the fly ash from the garbage incineration is realized; the secondary pollution can be effectively controlled; greenhouse gas emission is reduced; the treated ash meets the national policies of energy saving and emission reduction, and sustainable development; an important theoretical and practical significance is provided.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and relates to a dechlorination method. Background technique [0002] With the improvement of my country's economic and technological level, the increasing shortage of available land area, the coming of the energy resource crisis, and the increase of the calorific value of domestic waste, the waste incineration technology has received widespread attention, and the technology has developed very rapidly. There are a lot of heavy metals in the incineration ash. Among them, the toxic heavy metals such as Cd, Pb, Cr, Hg, etc., if not handled properly, will cause the migration of heavy metals, pollute groundwater, soil and air, and with the help of aquatic and Terrestrial food chains pose extremely serious hazards to human health. At present, the conventional ash treatment technology in my country is generally landfill treatment, which not only occupies a large amount of land resources...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
CPCY02W30/20Y02W30/78
Inventor 柴晓利赵欣刘归香王冬杨赵由才
Owner TONGJI UNIV
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