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Method for preparing water treatment phosphorus accumulation filler by sintering with household garbage incineration residues

A domestic waste incineration and water treatment technology, applied in biological water/sewage treatment, sustainable biological treatment, water/sludge/sewage treatment, etc., to save mineral resources, avoid secondary pollution, and improve phosphorus adsorption capacity

Inactive Publication Date: 2012-02-15
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In view of the risk of leaching heavy metals and inorganic salt components in the process of applying the existing domestic waste incineration slag to water treatment phosphorus aggregation, the present invention provides a method for preparing phosphorus-polymerized fillers by utilizing domestic waste incineration slag, mainly by means of high Ca in the domestic waste incineration slag , Al and Fe content have the basic characteristics of strong adsorption of phosphorus, using domestic waste incineration slag as the main raw material, mixed with a small amount of clay as a binder, and its plasticity index is greater than 17.0, the solid waste is synthesized into water treatment filler, and sintered at high temperature into water Treating phosphorus-polymerized fillers can improve the adsorption capacity of P in sewage while avoiding the risk of secondary pollution

Method used

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  • Method for preparing water treatment phosphorus accumulation filler by sintering with household garbage incineration residues
  • Method for preparing water treatment phosphorus accumulation filler by sintering with household garbage incineration residues
  • Method for preparing water treatment phosphorus accumulation filler by sintering with household garbage incineration residues

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Embodiment 1

[0035] The raw material domestic waste incineration slag of this embodiment is sieved by a trommel sieve with an aperture of 80 mm, and the oxides of Ca, Fe and Al in the sieved domestic waste incineration slag are respectively represented by CaO, Fe 2 o 3 and Al 2 o 3 Calculated, the mass percentages are 7.1%, 6.6% and 15.6% respectively; the sieved domestic waste incineration slag and the clay with a plasticity index of 18.0 are mixed according to the mass percentage of 75% and 25%, and the mixture is machined into a particle size 15-30 mm filler; when sintering at high temperature, rapidly rise from room temperature to 400°C and keep for 10 minutes; then slowly and quickly raise the temperature to 1200°C, stabilize the final sintering temperature, keep for 10 minutes, and then get the water-treated phosphorus-polymer filler after cooling. Namely synthetic fillers.

[0036] Heavy metal leaching experiments show that the leaching concentrations of Cd, Zn, Cr, Cu, Pb, and N...

Embodiment 2

[0043] The raw material domestic waste incinerator slag of this embodiment is sieved by a trommel sieve with an aperture of 50 mm, and the oxides of Ca, Fe and Al in the sieved domestic waste incinerator slag are respectively represented by CaO, Fe 2 o 3 and Al 2 o 3 Calculated, the mass percentages are 10.8%, 8.0% and 14.8% respectively; the sieved domestic waste incineration slag and the clay with a plasticity index of 17.5 are mixed according to the mass percentage of 70% and 30%, and the mixture is machined into a particle size 5-25 mm filler; when sintering at high temperature, rapidly rise from room temperature to 420°C and keep for 8 minutes; then slowly and quickly raise the temperature to 900°C to stabilize the final sintering temperature and keep for 12 minutes, and after cooling, the water-treated phosphorus-polymer filler is obtained. That is, synthetic fillers.

[0044] Heavy metal leaching experiments show that the leaching concentrations of Cd, Zn, Cr, Cu, Pb...

Embodiment 3

[0051] The raw material domestic waste incinerator slag of this embodiment is sieved by a trommel sieve with an aperture of 100 mm, and the oxides of Ca, Fe and Al in the sieved domestic waste incinerator slag are respectively represented by CaO, Fe 2 o 3 and Al 2 o 3 Calculated, the mass percentages are 7.3%, 6.6% and 16.1% respectively; the sieved domestic waste incineration slag and clay with a plasticity index of 18.3 are mixed according to the mass percentages of 65% and 35%, and the mixture is machined into a particle size 30~50mm filler; when sintering at high temperature, rapidly rise from room temperature to 380°C and keep for 12 minutes; then slowly and quickly raise the temperature to 1400°C to stabilize the final sintering temperature and keep for 8 minutes; after cooling, the water-treated phosphorus-polymer filler is obtained. That is, synthetic fillers.

[0052] Heavy metal leaching experiments show that the leaching concentrations of Cd, Zn, Cr, Cu, Pb, and ...

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Abstract

The invention relates to a method for preparing a water treatment phosphorus accumulation filler by sintering with household garbage incineration residues, belonging to the field of resource utilization of urban household garbage incineration residues. The method comprises the following steps of: (1) pretreating a raw material: screening the household garbage incineration residues with a drum screen of which the pore diameter is 50-100 millimeters; (2) mixing raw materials proportionally: preparing 60-80 percent by mass of household garbage incineration residues and 20-40 percent by mass of clay, and uniformly mixing the mixture; and (3) preparing a sample and sintering at high temperature: machining the mixture into a filler of which the particle diameter is 5-50 millimeters, sintering at the high temperature after a wet filler is dried in the air naturally, and cooling to room temperature after sintering at the high temperature. In the invention, the clay is taken as a bonding agent, so that soluble salts and heavy metal are prevented from entering a water body, and risk of secondary pollution is avoided; and simultaneously, the water treatment phosphorus accumulation filler has a large capability of adsorbing phosphorus in sewage, and the maximum adsorbing capability is 7-10 times that of artificial wet land filler zeolite.

Description

technical field [0001] The invention belongs to the field of resource utilization of municipal solid waste incinerator slag, and specifically relates to a method for co-sintering municipal solid waste incinerator slag and clay to prepare water treatment phosphorus-polymer filler. As a new way of resource utilization of waste incineration slag, it improves the economic added value of resource utilization. Background technique [0002] With the development of my country's urban economy and society, the problem of environmental pollution has become increasingly prominent. The inflow of various types of sewage and surface runoff has caused the concentration of nitrogen and phosphorus in many urban rivers, lakes and other landscape water bodies to seriously exceed the standard, and the phenomenon of eutrophication is serious. Numerous studies have shown that the eutrophication of urban landscape water in my country is due to the excessive content of nitrogen and phosphorus nutri...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B33/135C02F3/10
CPCY02P40/60Y02W10/10
Inventor 张后虎张毅孙庆瑶焦少俊贾博冯凯
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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