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Desilting method for silt mixed water body

A technology for water and sediment, applied in the field of dredging of mixed water with sediment, can solve the problems of threat, large impact, rough treatment method, etc., and achieve the effect of large benefit, small impact degree and small impact time.

Pending Publication Date: 2021-08-06
JIANGSU DONGZHU LANDSCAPE CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Taking the water body with high sediment content as an example, the existing treatment methods are generally rough. After the sediment deposits are removed, there is still a large amount of sediment suspended in the water body. It takes a long time for natural settlement to gradually purify the water body. And the degree of purification is low
Moreover, maintaining a high sediment content in the water body for a long time will pose a great threat to aquatic organisms such as fish and algae, and have a great impact on the original ecology
In addition, the existing treatment methods will also cause some secondary pollution to the surrounding soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for dredging mud-sand mixed water, comprising the following steps:

[0023] (S1) Extract the water body containing sediment, and separate the sand particles and high-silt sewage;

[0024] (S2) Excavate the remaining thin mud after removing the silt-containing water body, pass through a vibrating sieve to remove impurities, and obtain the first thin mud;

[0025] (S3) Introduce the high-silt sewage into the sedimentation tank, add a precipitant to settle the sludge, and separate the low-silt sewage and the second thin sludge;

[0026] (S4) Mix the first slime and the second slime and send them to a filter press for pressure filtration to obtain mud cake and filtrate;

[0027] (S5) The filtrate is mixed with low-silt sewage and passed through the sand and gravel filter wall, and then sent to the membrane filtration system for filtration to obtain clean water.

[0028] In the step (S1) of this embodiment, the silt-containing water body is screened to remove surf...

Embodiment 2

[0035] A method for dredging mud-sand mixed water, comprising the following steps:

[0036] (S1) Extract the water body containing sediment, and separate the sand particles and high-silt sewage;

[0037] (S2) Excavate the remaining thin mud after removing the silt-containing water body, pass through a vibrating sieve to remove impurities, and obtain the first thin mud;

[0038] (S3) Introduce the high-silt sewage into the sedimentation tank, add a precipitant to settle the sludge, and separate the low-silt sewage and the second thin sludge;

[0039] (S4) Mix the first slime and the second slime and send them to a filter press for pressure filtration to obtain mud cake and filtrate;

[0040] (S5) The filtrate is mixed with low-silt sewage and passed through the sand and gravel filter wall, and then sent to the membrane filtration system for filtration to obtain clear water.

[0041] In the step (S1) of this embodiment, the silt-containing water body is screened to remove surf...

Embodiment 3

[0048] A method for dredging mud-sand mixed water, comprising the following steps:

[0049] (S1) Extract the water body containing sediment, and separate the sand particles and high-silt sewage;

[0050] (S2) Excavate the remaining thin mud after removing the silt-containing water body, pass through a vibrating sieve to remove impurities, and obtain the first thin mud;

[0051] (S3) Introduce the high-silt sewage into the sedimentation tank, add a precipitant to settle the sludge, and separate the low-silt sewage and the second thin sludge;

[0052] (S4) Mix the first slime and the second slime and send them to a filter press for pressure filtration to obtain mud cake and filtrate;

[0053] (S5) The filtrate is mixed with low-silt sewage and passed through the sand and gravel filter wall, and then sent to the membrane filtration system for filtration to obtain clean water.

[0054] In the step (S1) of this embodiment, the silt-containing water body is screened to remove surf...

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Abstract

The invention belongs to the technical field of water environment treatment, and particularly relates to a desilting method for a silt mixed water body. The method comprises the following steps: (S1) pumping a water body containing silt, and separating to obtain sand grains and high-mud sewage; (S2) digging sludge left after the silt-containing water body is extracted, and screening impurities through a vibrating screen to obtain first sludge; (S3) introducing the high-sludge sewage into a sedimentation tank, adding a precipitator to settle sludge, and separating to obtain low-sludge sewage and second sludge; (S4) mixing the first sludge and the second sludge, and feeding the mixture into a filter press for filter pressing to obtain a mud cake and filtrate; and (S5) mixing the filtrate with the low-sludge sewage, passing the mixture through a gravel filter wall, and then feeding the mixture into a membrane filtration system for filtration to obtain clear water. The method is high in treatment degree and does not generate additional pollution. After treatment, mud cakes with low water content, clean water with high cleanliness and a small amount of sand grains can be obtained. The desilting method for the silt mixed water body can obtain great benefits in the two aspects of environmental protection and resources.

Description

technical field [0001] The invention belongs to the technical field of water environment treatment, and in particular relates to a dredging method for a mud-sand mixed water body. Background technique [0002] In recent years, water environment governance has been paid more and more attention. Taking the water body with high sediment content as an example, the existing treatment methods are generally relatively rough. After removing the sediment deposits, there is still a large amount of sediment suspended in the water body. It takes a long time for natural settlement to gradually purify the water body. And the degree of purification is low. Moreover, maintaining a high sediment content in the water body for a long time will pose a great threat to aquatic organisms such as fish and algae, and have a greater impact on the original ecology. In addition, the existing treatment methods will also cause some secondary pollution to the surrounding soil. Contents of the inventio...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F11/122C02F1/56C02F1/52C02F1/44
CPCC02F9/00C02F11/122C02F1/56C02F1/5245C02F1/44C02F1/001C02F2303/24
Inventor 张胜佳王小雷华佳毅李庆铜
Owner JIANGSU DONGZHU LANDSCAPE CONSTR
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