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Riverway bottom mud ecological brick for riverway restoration work and preparing method thereof

A technology for river bottom mud and river restoration, which is applied in applications, household utensils, clay products, etc., can solve the problem of resource utilization of heavy metal river bottom mud, and achieve the effect of saving clay resources

Inactive Publication Date: 2019-08-13
WUXI MUNICIPAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a river channel bottom mud ecological brick used in river course restoration projects and a preparation method thereof to solve the problem of resource utilization of heavy metal river course bottom mud. The heavy metal polluted river course bottom mud is used as the main raw material to make river course restoration ecological bricks, which saves on the one hand On the other hand, it can also realize the reduction, harmlessness and stabilization of heavy metal-polluted river sediment, and open up a new way of resource utilization

Method used

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  • Riverway bottom mud ecological brick for riverway restoration work and preparing method thereof

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Effect test

Embodiment 1

[0022] For the river bottom mud ecological bricks used in river restoration projects prepared in this embodiment, firstly, the river bottom mud with a water content of about 92-98% is dehydrated and dried to obtain dry bottom mud with a water content of 45-50%, and then the above-mentioned 75% dry bottom mud, 10% fly ash, 10% calcium carbide slag and 5% pore-forming agent rice husk powder are sintered as the main raw materials. The specific preparation process is as follows:

[0023] (1) Initial dehydration of raw materials: The dredged heavy metal polluted river sediment with a moisture content of 92-98% is blast-dried at 105-110°C for 0.5h to obtain a sediment with a moisture content of 80-85%.

[0024] (2) Heavy metal stabilization treatment: 9.7Kg of the bottom sludge obtained in (1) and 0.3Kg of quicklime were stirred and mixed for 30 minutes in a stirring mixing tank to prepare bottom sludge with a water content of 70-75%.

[0025] (3) Re-dehydration of raw materials: bl...

Embodiment 2

[0033] The ecological bricks for heavy metal-contaminated river bottom mud in river restoration projects prepared in this embodiment first dehydrate and dry the river bottom mud with a water content of about 92 to 98% to obtain dry bottom mud with a water content of 45 to 50%, and then use the The above-mentioned mass ratio of 80% dry bottom mud, 8% fly ash, 8% carbide slag and 4% pore-forming agent rice husk powder is sintered as the main raw materials. The specific preparation process is as follows:

[0034] (1) Initial dehydration of raw materials: The dredged heavy metal polluted river sediment with a water content of 92-98% is blast-dried at 105-110°C for 0.5h to obtain sludge with a water content of 80-85%.

[0035] (2) Heavy metal stabilization treatment: 9.8Kg of the bottom sludge obtained in (1) and 0.2Kg of quicklime were stirred and mixed for 30 minutes in a stirring mixing tank to obtain bottom sludge with a water content of 70-75%.

[0036] (3) Re-dehydration of r...

Embodiment 3

[0044] The ecological bricks for heavy metal-contaminated river bottom mud in river restoration projects prepared in this embodiment first dehydrate and dry the river bottom mud with a water content of about 92 to 98% to obtain dry bottom mud with a water content of 45 to 50%, and then use the The above-mentioned mass ratio of 85% dry bottom mud, 6% fly ash, 6% carbide slag and 3% pore-forming agent rice husk powder is sintered as the main raw materials. The specific preparation process is as follows:

[0045] (1) Initial dehydration of raw materials: The dredged heavy metal polluted river sediment with a water content of 92-98% is blast-dried at 105-110°C for 0.5h to obtain sludge with a water content of 80-85%.

[0046] (2) Heavy metal stabilization treatment: 9.8Kg of the bottom sludge obtained in (1) and 0.2Kg of quicklime were stirred and mixed for 30 minutes in a stirring mixing tank to obtain bottom sludge with a water content of 70-75%.

[0047] (3) Re-dehydration of r...

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Abstract

The invention provides a riverway bottom mud ecological brick for riverway restoration work and a preparing method thereof. The ecological brick is mainly prepared from, by mass, 75-85% of dry bottommud, 5-10% of pulverized fuel ash, 5-10% of carbide slags and 2-5% of a pore forming agent. According to the riverway bottom mud ecological brick and the preparing method thereof, adopted raw materials including the heavy-metal-polluted riverway bottom mud, the pulverized fuel ash, the carbide slags, the pore-forming agent and rice hulls are all industrial or agricultural waste; meanwhile, the ecological brick is used for riverway restoration, the purpose of treating waste with waste is achieved, a new means of recycling the waste is put forward, and meanwhile, clay resources are saved.

Description

technical field [0001] The invention relates to the fields of waste recycling and river restoration engineering, in particular to a river bottom mud ecological brick used in river restoration engineering and a preparation method thereof. Background technique [0002] The river sediment is the "source" and "sink" of black and odorous rivers. The "sink" collects a large amount of pollutants and deposits them. At the same time, it also releases pollutants into the water body and becomes the "source" of pollution. The bottom sediment of the river channel is huge, and there is also serious heavy metal pollution, which has a potential high ecological risk. At present, most of the dewatered river sediments are landfilled as garbage, which requires a large area of ​​land and transportation costs, and the dehydration, anti-seepage treatment and landfill requirements of sediments contaminated with heavy metals are higher. Therefore, how to treat and dispose of heavy metal-polluted ri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/135C04B33/32C04B38/06E02B3/14
CPCC04B33/132C04B33/1321C04B33/1328C04B33/1352C04B33/32C04B38/0675C04B2235/6562C04B2235/6567E02B3/14C04B33/1324Y02P40/60Y02A20/402
Inventor 罗刚耿震佘步存
Owner WUXI MUNICIPAL DESIGN INST
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