Porous biological ceramsite prepared from waste incineration fly ash and biomass pyrolysis gasification residue, and preparation method thereof

A technology of waste incineration fly ash, pyrolysis and gasification, which is applied to ceramic products, other household appliances, household appliances, etc., can solve the problems of blank application in the field of wastewater treatment, recycling of heavy metal resources, and environmental hazards, etc. The effect of harmless treatment, recycling and reducing pollution toxicity

Inactive Publication Date: 2016-06-29
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, at present, the ceramsite fired from waste incineration fly ash is mostly used in building materials, and the application in the field of wastewater treatment is still blank.
In addition, fly ash contains high salt content (mainly chlorine salts) and abundant heavy metal resources, but the existing method of burning ceramsite with fly ash does not recycle these heavy metal resources. On the contrary, these heavy metal substances are in In the presence of chlorine, there is still a great ri

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1: Waste incineration fly ash gasification treatment and biomass pyrolysis gasification

[0026] Gasification treatment of waste incineration fly ash: Mix the waste incineration fly ash with a chlorine-containing gasification agent and roast it at 800-1000°C for 0.5-3h, and the mass fraction of the chlorine-containing gasification agent is 2-20wt%; The secondary fly ash is collected by a bag filter for recycling, and the residual fly ash after roasting is collected as one of the raw materials in the subsequent steps;

[0027] According to the type and content of heavy metals in waste incineration fly ash, adjust the type and amount of chlorine-containing gasification agent, gasification temperature and time to achieve the best heavy metal separation effect. In the present invention, the chlorine-containing gasification agent is one or a mixture of two or more of potassium chloride, calcium chloride, sodium chloride, magnesium chloride, aluminum chloride, and iron chl...

Example Embodiment

[0030] Example 2-6: Preparation of porous biological ceramsite

Example Embodiment

[0031] Example 2:

[0032] The raw material mass percentage of the porous biological ceramsite prepared in this embodiment is as follows:

[0033] After gasification heat treatment, waste incineration fly ash 25%, biomass pyrolysis-gasification residue 15%, tourmaline 15%, fly ash 30% and kaolin 15%.

[0034] The porous biological ceramsite in this embodiment is obtained by the following preparation method:

[0035] The waste incineration fly ash, biomass pyrolysis-gasification residue, tourmaline, fly ash, and kaolin after gasification heat treatment according to the above-mentioned mass ratio are mixed, and the mixture is obtained after being crushed and passed through a 40-100 mesh sieve. Add water to the mixture, the amount of water added is 30% of the mass of the mixture, then the mixture is fully stirred and mixed evenly, and the pellets are granulated into 2-15mm spherical granules with a granulator. The spherical granules are at 105℃. Dry at a constant temperature for 3 hours...

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Abstract

The invention discloses a method used for producing porous biological ceramsite by taking waste incineration fly ash and biomass pyrolysis-gasification residue as raw materials. The method comprises following steps: household garbage incineration fly ash is subjected to high temperature treatment in the presence of a gasification agent so as to obtain residual ash; biomass is subjected to low temperature pyrolysis-high temperature steam gasification so as to obtain a pyrolytic residue; the residual ash, the pyrolytic residue, flyash, clay, and a pore-forming agent are subjected to mixing, pelleting, drying, and high temperature roasting so as to obtain the porous biological ceramsite product. Technology of the method is simple; operation is convenient; harmlessness treatment of fly ash and biomass pyrolysis gasification residue can be realized; the porous biological ceramsite product is prepared from waste incineration fly ash and biomass pyrolysis residue; quantity demand of ceramsite industrial on natural raw materials is reduced; and environment-protection value and economic value are both high.

Description

technical field [0001] The invention provides a kind of porous biological ceramsite for heavy metal wastewater treatment prepared by using waste incineration fly ash and biomass pyrolysis residue, the purpose is to resource utilization of waste incineration fly ash and biomass pyrolysis residue, not only effectively reduce the Environmental load can also increase the added value of waste resources. Background technique [0002] With the growth of my country's urban population, economic development and improvement of residents' living standards, the discharge of domestic waste is increasing day by day. Domestic waste incineration is becoming an important means of dealing with municipal waste and developing new energy in many countries where land and energy resources are scarce due to its small footprint, remarkable effect of volume reduction and harmlessness, and thermal energy utilization. Fly ash is the main carrier of secondary pollution from waste incineration. It is gen...

Claims

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Application Information

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IPC IPC(8): C04B38/00
Inventor 孔丝纺曾辉
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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