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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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 characteri

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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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Example Embodiment

[0034] Example 1

[0035] The raw material domestic waste incinerator slag of this embodiment is screened by a drum screen with an aperture of 80 mm, and the oxides of Ca, Fe and Al in the sieved domestic waste incinerator slag are respectively CaO and Fe 2 O 3 And Al 2 O 3 Calculated, its mass percentage content was 7.1%, 6.6% and 15.6% respectively; the sieved domestic waste incineration slag and the clay with plasticity index of 18.0 were mixed according to the mass percentage of 75% and 25%, and the mixture was processed into particle size by machine It is a 15~30 mm filler; during high temperature sintering, the temperature rises rapidly from room temperature to 400°C and keeps it for 10 minutes; then the temperature is increased slowly and quickly to 1200°C to stabilize the final sintering temperature and keep it for 10 minutes. After cooling, the water-treated phosphorous polymer filler will be obtained. Namely synthetic filler.

[0036] Heavy metal leaching experiments sho...

Example Embodiment

[0042] Example 2

[0043] The raw material domestic waste incinerator slag of this embodiment is sieved by a drum screen with an aperture of 50 mm, and the oxides of Ca, Fe and Al in the sieved domestic waste incinerator slag are respectively CaO and Fe 2 O 3 And Al 2 O 3 Calculated, its mass percentage content was 10.8%, 8.0% and 14.8% respectively; the sieved domestic waste incinerator slag and the clay with plasticity index of 17.5 were mixed according to the mass percentage of 70% and 30%, and the mixture was processed into particle size by machine It is a 5~25 mm filler; during high-temperature sintering, the temperature rises rapidly from room temperature to 420°C and keeps it for 8 minutes; then slowly and quickly raises it to 900°C to stabilize the final sintering temperature and keep it for 12 minutes. After cooling, the water-treated phosphorous polymer filler will be obtained. Namely synthetic filler.

[0044] Heavy metal leaching experiments show that the leaching conc...

Example Embodiment

[0050] Example 3

[0051] The raw material domestic waste incinerator slag of this embodiment is sieved by a drum screen with an aperture of 100 mm, and the oxides of Ca, Fe and Al in the sieved domestic waste incinerator slag are respectively CaO and Fe 2 O 3 And Al 2 O 3 Calculated, its mass percentage content was 7.3%, 6.6% and 16.1% respectively; the sieved domestic waste incineration slag and the clay with plasticity index of 18.3 were mixed according to the mass percentage of 65% and 35%, and the mixture was processed into particle size by machine. It is a filler of 30-50 mm; during high-temperature sintering, the temperature rises rapidly from room temperature to 380°C and keeps it for 12 minutes; then the temperature is increased slowly and quickly to 1400°C to stabilize the final sintering temperature and keep it for 8 minutes. After cooling, the water-treated phosphorous polymer filler will be obtained. Namely synthetic filler.

[0052] Heavy metal leaching experiments s...

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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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