CN112661386A - Reservoir sludge dewatering and curing method - Google Patents
Reservoir sludge dewatering and curing method Download PDFInfo
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- CN112661386A CN112661386A CN202011643515.5A CN202011643515A CN112661386A CN 112661386 A CN112661386 A CN 112661386A CN 202011643515 A CN202011643515 A CN 202011643515A CN 112661386 A CN112661386 A CN 112661386A
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Abstract
The invention relates to the technical field of environmental protection, and discloses a reservoir sludge dewatering and curing method, which comprises the following steps: s1, building a cofferdam in the reservoir, closing part of water channel in the reservoir by the cofferdam, and discharging water inside the cofferdam through a hydraulic pump; s2, the sludge in the reservoir passes through a first slurry pump arranged at the bottom of the reservoir, the first slurry pump pumps the sludge into a stirrer, and the stirrer stirs the sludge uniformly; s3, pumping the uniformly stirred sludge into a mud-water separation device through a second mud pump, simultaneously adding a flocculating agent into the mud-water separation device, and stirring the sludge to obtain pasty slurry; s4, performing filter pressing on the stirred sludge through a plate-and-frame filter press so as to filter press the sludge into a sludge cake; and S5, crushing the mud cakes through a crusher to enable the mud cakes to become powder. The invention provides a method for dehydrating and curing reservoir sludge, which aims to achieve the purpose of environmental protection by treating the reservoir sludge.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a reservoir sludge dewatering and curing method.
Background
At present, river dredging becomes an important subject of water conservancy work, and in river dredging engineering, sediment obtained by dredging is in a mud-water form, and the water content is generally 75% -90%. Along with the development of the industry and life at present, the content of organic matters and heavy metals in the bottom mud is increased, and because the bottom mud contains a large amount of organic pollutants and heavy metals, the dredging bottom mud is taken out and recycled to become a bottleneck, and particularly, the bottom mud is subjected to cost drying and utilization, and harmful organic pollutants and heavy metals are solidified to become the most troublesome problems in the treatment of the bottom mud in rivers and lakes. The reservoir sludge is treated by direct natural air drying, but the problem of serious pollution to the surrounding environment exists in the direct natural air drying.
Disclosure of Invention
The purpose of the invention is: the invention provides a method for dehydrating and curing reservoir sludge, which aims to achieve the purpose of environmental protection by treating the reservoir sludge.
In order to achieve the purpose, the invention provides a reservoir sludge dewatering and curing method, which comprises the following steps:
s1, building a cofferdam in the reservoir, closing part of water channels in the reservoir by the cofferdam, and discharging water on the inner side of the cofferdam through a hydraulic pump;
s2, enabling the sludge in the reservoir to pass through a first sludge pump arranged at the bottom of the reservoir, pumping the sludge into a stirrer by the first sludge pump, and uniformly stirring the sludge by the stirrer;
s3, pumping the uniformly stirred sludge into a mud-water separation device through a second mud pump, adding a flocculating agent into the mud-water separation device, and stirring the sludge to obtain pasty slurry;
s4, performing filter pressing on the stirred sludge through a plate-and-frame filter press so as to filter press the sludge into a sludge cake;
and S5, crushing the mud cakes through a crusher to enable the mud cakes to become powder.
In some embodiments of the present application, in the step S2, the stirring speed of the stirrer is 80r/min to 160r/min, and the stirring time of the stirrer is not less than 15 min.
In some embodiments of the present application, in the step S3, the flocculant is one of a polyacrylamide flocculant solution, an inorganic flocculant solution, and a composite flocculant solution.
In some embodiments of the present application, in the step S3, the mud-water separating device is a centrifugal mud-water separator.
In some embodiments of the present application, in the step S3, after the sludge is uniformly stirred, the sludge is left to stand for not less than 60 min.
In some embodiments of the present application, in the step S4, the filter pressing time of the plate and frame filter press is not less than 60 min.
In some embodiments of the present application, in the step S5, after the pulverizer pulverizes the mud cake, the mud cake is dried.
The embodiment of the invention provides a reservoir sludge dewatering and curing method, which has the following beneficial effects compared with the prior art:
by the step S1, a cofferdam is built in the reservoir in the step S1, and the cofferdam closes part of water channels in the reservoir, so that water in the cofferdam can be discharged through a hydraulic pump until all the water channels on the inner side of the cofferdam are silt, and the silt is conveniently discharged;
by the step S2, sewage entering the stirrer at different times is fully mixed, the water quality is uniform, and sludge precipitation is not easy to generate;
through the step S3, the sludge is stirred by the sludge-water separation device to become pasty slurry, so that the flocculating agent can be completely dispersed in the sludge, and the adjusting effect of the flocculating agent is greatly improved; in addition, the flocculating agent is arranged to enable fine particles and natural colloidal particles in the sewage to be coagulated into large floccules after the flocculating agent redundantly collects the sewage, so that the fine particles and the natural colloidal particles can be conveniently removed;
through the step S4, the sludge is subjected to filter pressing through a plate-and-frame filter press, so that the water content of the sludge is further reduced;
through the setting step S5, the mud cakes are crushed, so that the transportation of the mud cakes is facilitated;
therefore, the reservoir sludge dewatering and curing method provided by the embodiment of the invention can achieve the purpose of treating the reservoir sludge to achieve environmental protection.
Drawings
FIG. 1 is a flow chart of a method for dewatering and curing reservoir sludge according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
As shown in fig. 1, an embodiment of the present invention provides a method for dewatering and solidifying reservoir sludge, which includes the following steps:
s1, building a cofferdam in the reservoir, closing part of water channel in the reservoir by the cofferdam, and discharging water inside the cofferdam through a hydraulic pump;
s2, the sludge in the reservoir passes through a first slurry pump arranged at the bottom of the reservoir, the first slurry pump pumps the sludge into a stirrer, and the stirrer stirs the sludge uniformly;
s3, pumping the uniformly stirred sludge into a mud-water separation device through a second mud pump, simultaneously adding a flocculating agent into the mud-water separation device, and stirring the sludge to obtain pasty slurry;
s4, performing filter pressing on the stirred sludge through a plate-and-frame filter press so as to filter press the sludge into a sludge cake;
and S5, crushing the mud cakes through a crusher to enable the mud cakes to become powder.
Based on the arrangement, the reservoir sludge dewatering and curing method provided by the embodiment of the invention has the following advantages:
by the step S1, a cofferdam is built in the reservoir in the step S1, and the cofferdam closes part of water channels in the reservoir, so that water in the cofferdam can be discharged through a hydraulic pump until all the water channels on the inner side of the cofferdam are silt, and the silt is conveniently discharged;
by the step S2, sewage entering the stirrer at different times is fully mixed, the water quality is uniform, and sludge precipitation is not easy to generate;
through the step S3, the sludge is stirred by the sludge-water separation device to become pasty slurry, so that the flocculating agent can be completely dispersed in the sludge, and the adjusting effect of the flocculating agent is greatly improved; in addition, the flocculating agent is arranged to enable fine particles and natural colloidal particles in the sewage to be coagulated into large floccules after the flocculating agent redundantly collects the sewage, so that the fine particles and the natural colloidal particles can be conveniently removed;
through the step S4, the sludge is subjected to filter pressing through a plate-and-frame filter press, so that the water content of the sludge is further reduced;
through the setting step S5, the mud cakes are crushed, so that the transportation of the mud cakes is facilitated;
therefore, the reservoir sludge dewatering and curing method provided by the embodiment of the invention can achieve the purpose of treating the reservoir sludge to achieve environmental protection.
In some embodiments, optionally, as shown in fig. 1, in step S2, the stirring speed of the stirrer is 80r/min to 160r/min, and the stirring time of the stirrer is not less than 15 min. Therefore, the stirring speed of the stirrer ensures that the sludge entering the stirrer is uniformly stirred; furthermore, the stirring time of the stirrer ensures the stirring effect of the sludge.
In some embodiments, optionally, as shown in fig. 1, in step S3, the flocculant is one of a polyacrylamide flocculant solution, an inorganic flocculant solution and a composite flocculant solution, and the user can select the corresponding flocculant according to the test requirements.
In some embodiments, optionally, as shown in fig. 1, in step S3, the mud-water separating device is a centrifugal mud-water separator. Therefore, the centrifugal mud-water separator can well stir the sludge to enable the sludge to become pasty slurry, thereby ensuring that the flocculating agent can be completely dispersed in the sludge,
in some embodiments, optionally, as shown in fig. 1, in step S3, after the sludge is uniformly stirred, the sludge is left to stand for not less than 60 min.
In some embodiments, optionally, as shown in fig. 1, in step S4, the filter pressing time of the plate and frame filter press is not less than 60min, so as to ensure the filter pressing effect of the plate and frame filter press.
In some embodiments, optionally, as shown in fig. 1, in step S5, after the pulverizer pulverizes the mud cake, the mud cake is dried, so as to further reduce the water content of the mud cake, and further facilitate transportation of the mud cake.
In summary, the reservoir sludge dewatering and curing method provided by the embodiment of the invention has the following advantages:
by the step S1, a cofferdam is built in the reservoir in the step S1, and the cofferdam closes part of water channels in the reservoir, so that water in the cofferdam can be discharged through a hydraulic pump until all the water channels on the inner side of the cofferdam are silt, and the silt is conveniently discharged;
by the step S2, sewage entering the stirrer at different times is fully mixed, the water quality is uniform, and sludge precipitation is not easy to generate;
through the step S3, the sludge is stirred by the sludge-water separation device to become pasty slurry, so that the flocculating agent can be completely dispersed in the sludge, and the adjusting effect of the flocculating agent is greatly improved; in addition, the flocculating agent is arranged to enable fine particles and natural colloidal particles in the sewage to be coagulated into large floccules after the flocculating agent redundantly collects the sewage, so that the fine particles and the natural colloidal particles can be conveniently removed;
through the step S4, the sludge is subjected to filter pressing through a plate-and-frame filter press, so that the water content of the sludge is further reduced;
through the setting step S5, the mud cakes are crushed, so that the transportation of the mud cakes is facilitated;
therefore, the reservoir sludge dewatering and curing method provided by the embodiment of the invention can achieve the purpose of treating the reservoir sludge to achieve environmental protection.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (7)
1. The method for dehydrating and curing the reservoir sludge is characterized by comprising the following steps of:
s1, building a cofferdam in the reservoir, closing part of water channels in the reservoir by the cofferdam, and discharging water on the inner side of the cofferdam through a hydraulic pump;
s2, enabling the sludge in the reservoir to pass through a first sludge pump arranged at the bottom of the reservoir, pumping the sludge into a stirrer by the first sludge pump, and uniformly stirring the sludge by the stirrer;
s3, pumping the uniformly stirred sludge into a mud-water separation device through a second mud pump, adding a flocculating agent into the mud-water separation device, and stirring the sludge to obtain pasty slurry;
s4, performing filter pressing on the stirred sludge through a plate-and-frame filter press so as to filter press the sludge into a sludge cake;
and S5, crushing the mud cakes through a crusher to enable the mud cakes to become powder.
2. The method for dewatering and solidifying reservoir sludge according to claim 1, wherein in the step S2, the stirring speed of the stirrer is 80 r/min-160 r/min, and the stirring time of the stirrer is not less than 15 min.
3. The method of claim 1, wherein in step S3, the flocculant is one of a polyacrylamide flocculant solution, an inorganic flocculant solution, and a composite flocculant solution.
4. The method for dewatering and solidifying reservoir sludge according to claim 1, wherein in the step S3, the sludge-water separating device is a centrifugal type sludge-water separator.
5. The method for dehydrating and solidifying the sludge in the reservoir according to claim 1, wherein in the step S3, the sludge is left to stand for not less than 60min after the sludge is stirred uniformly.
6. The method for dehydrating and solidifying reservoir sludge according to claim 1, wherein in the step S4, the filter pressing time of the plate and frame filter press is not less than 60 min.
7. The method for dehydrating and solidifying reservoir sludge, as recited in claim 1, wherein said step S5 is performed by drying said sludge cake after said pulverizer pulverizes said sludge cake.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011643515.5A CN112661386A (en) | 2020-12-31 | 2020-12-31 | Reservoir sludge dewatering and curing method |
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| CN202011643515.5A CN112661386A (en) | 2020-12-31 | 2020-12-31 | Reservoir sludge dewatering and curing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113816572A (en) * | 2021-09-18 | 2021-12-21 | 南昌大学 | Method for quickly dehydrating and curing foundation pit sludge |
| CN113998850A (en) * | 2021-10-28 | 2022-02-01 | 广东棣业建设集团有限公司 | Municipal sludge dewatering and curing method |
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| CN201258503Y (en) * | 2008-07-21 | 2009-06-17 | 谭胜伟 | Environment protection dredging boat for river |
| CN104058568A (en) * | 2014-07-01 | 2014-09-24 | 彭宏方 | Method for treating mud silt |
| CN105585238A (en) * | 2016-03-01 | 2016-05-18 | 长沙锦佳环保科技有限公司 | Sludge treatment method |
| CN105776817A (en) * | 2016-04-28 | 2016-07-20 | 广州市水电建设工程有限公司 | Quick dewatering process for city watercourse sludge |
| CN205473290U (en) * | 2016-03-07 | 2016-08-17 | 武汉市政工程设计研究院有限责任公司 | A comprehensive control system for urban lake pollution silt |
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2020
- 2020-12-31 CN CN202011643515.5A patent/CN112661386A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201258503Y (en) * | 2008-07-21 | 2009-06-17 | 谭胜伟 | Environment protection dredging boat for river |
| CN104058568A (en) * | 2014-07-01 | 2014-09-24 | 彭宏方 | Method for treating mud silt |
| CN105585238A (en) * | 2016-03-01 | 2016-05-18 | 长沙锦佳环保科技有限公司 | Sludge treatment method |
| CN205473290U (en) * | 2016-03-07 | 2016-08-17 | 武汉市政工程设计研究院有限责任公司 | A comprehensive control system for urban lake pollution silt |
| CN105776817A (en) * | 2016-04-28 | 2016-07-20 | 广州市水电建设工程有限公司 | Quick dewatering process for city watercourse sludge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113816572A (en) * | 2021-09-18 | 2021-12-21 | 南昌大学 | Method for quickly dehydrating and curing foundation pit sludge |
| CN113998850A (en) * | 2021-10-28 | 2022-02-01 | 广东棣业建设集团有限公司 | Municipal sludge dewatering and curing method |
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Application publication date: 20210416 |