Mud brick fired by environment-friendly comprehensive utilization of wastes and preparation method thereof

A waste and sludge technology, which is applied in the field of environmental protection utilization of waste resources, can solve the problems that the characteristics of sludge and sludge have not been fully utilized, heavy metals in sludge have not been effectively resolved, and river sludge and domestic sludge are mixed up to achieve social and economic benefits. Significant, landfill-saving, low-cost effects

Inactive Publication Date: 2013-07-03
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In summary, the main problems existing in the prior art are: the one, the operability of the sludge dehydration method is not strong; Confusion, silt and underused characteristics inherent in sludge itself

Method used

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  • Mud brick fired by environment-friendly comprehensive utilization of wastes and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]Step 1, material selection: select the dredged silt from the Baima Lake dredged silt yard that has been preliminarily dehydrated with a moisture content of ≤80% and a clay component content of ≥30%, and select Changshu Jiangnan Water Sewage Treatment Plant with a clay component content of ≥30% for water treatment The sludge generated after the waste incineration plant in Changshu is selected from the bottom slag of domestic waste incineration and the active waste produced after domestic waste incineration that meet the standard of "Slag Aggregate for Domestic Waste Incineration" (GB / T 25032-2010). fly ash, choose common II grade quicklime, and all selected materials meet the component weight ratio of the present invention;

[0036] Step 2, mixing materials: according to the weight ratio of 50% dredged silt, 10% sludge, 20% domestic waste incineration bottom slag, 17.5% fly ash and 2.5% quicklime, weigh 12.2 kg of selected materials, using Zhengzhou The JZC500 drum mixer ...

Embodiment 2

[0042] Step 1, material selection: Select Ningbo Sanjiang River Silt with water content ≤ 80% and clay component content ≥ 30% after preliminary dehydration, select sludge from sewage treatment plant with clay content ≥ 30%, and select waste incineration from Everbright Suzhou The domestic waste incineration bottom slag and fly ash with active waste produced after domestic waste incineration that meet the standard of "Household Waste Incineration Slag Aggregate" (GB / T 25032-2010) in power plants shall be ordinary II quicklime, all Material selection conforms to the component weight ratio of the present invention;

[0043] Step 2, mixing materials: 16.2 kg of selected materials are weighed according to the weight ratio of dredged silt 35%, sludge 15%, domestic waste incineration bottom slag 25%, fly ash 20% and quicklime 5%. The JZC500 drum mixer produced by Innovative Construction Machinery Manufacturing Co., Ltd. adopts the mechanical automatic feeding method. Put it into t...

Embodiment 3

[0049] Step 1, material selection: Select the Qiantang River dredging sludge with a moisture content ≤ 80% and a clay content ≥ 30% after preliminary dehydration, select sewage treatment plant sludge with a clay content ≥ 30%, and select waste from Shanghai Pufa Yuqiao The domestic waste incineration bottom slag and fly ash with active waste produced after domestic waste incineration that meet the standard of "Household Waste Incineration Slag Aggregate" (GB / T 25032-2010) in the incineration power plant shall be ordinary II quicklime, all Material selection conforms to the component weight ratio of the present invention;

[0050] Step 2, mixing materials: 12.2 kg of selected materials were weighed according to the weight ratio of dredged silt 65%, sludge 5%, domestic waste incineration bottom slag 20%, fly ash 7.5% and quicklime 2.5%, using Zhengzhou The JZC500 drum mixer produced by Innovative Construction Machinery Manufacturing Co., Ltd. adopts the mechanical automatic fee...

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Abstract

The invention belongs to the field of waste resource environment-friendly utilization, and particularly relates to a mud brick fired by environment-friendly comprehensive utilization of wastes and a preparation method thereof. The mud brick comprises the following components by weight percent: 35-65 percent of dredging silt, 5-15 percent of sludge, 15-25 percent of domestic waste incineration slag, 10-25 percent of fly ash and 1-5 percent of quicklime, wherein the dredging silt is in large rivers, lakes, rivers or sea and has the water content of less than or equal to 80 percent and the clay component content of more than or equal to 30 percent; the sludge is generated after water treatment in a sewage treatment plant and has the clay component content of more than or equal to 30 percent; the domestic waste incineration slag and the fly ash are active wastes generated by incineration of domestic wastes; and quicklime is common quicklime II. The invention has the advantages that various wastes are comprehensively utilized in an environment-friendly manner and changed into valuables to avoid secondary pollution, and the social and economic benefits are remarkable. The mud brick can be extensively used in municipal engineering and construction engineering, protects the environment and saves resources.

Description

[0001] technical field [0002] The invention belongs to the field of environmental protection utilization of waste resources, and in particular relates to a silt brick fired by environmental protection comprehensive utilization of waste and a method thereof. Background technique [0003] A large amount of dredged silt is produced during the dredging process of rivers, lakes, rivers, and seas. The recycling of dredged silt requires dehydration treatment, but dehydration treatment is very difficult. Now most of the silt disposal methods are stacked in yards, occupying a large amount of farmland and polluting the environment. After incineration of MSW, about 22% of the bottom slag and 3-5% of the fly ash are produced. The bottom slag can be processed into aggregates for engineering applications. The fly ash contains more heavy metals and needs to be treated for recycling. At present, most The state adopts melting solidification, cement solidification or chemical stabilization ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132
CPCY02P40/60
Inventor 高玉峰尹立新周源陆志浩
Owner HOHAI UNIV
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