CN112499920B - Waste slurry dehydration and solidification treatment method - Google Patents
Waste slurry dehydration and solidification treatment method Download PDFInfo
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- CN112499920B CN112499920B CN202011556877.0A CN202011556877A CN112499920B CN 112499920 B CN112499920 B CN 112499920B CN 202011556877 A CN202011556877 A CN 202011556877A CN 112499920 B CN112499920 B CN 112499920B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/008—Sludge treatment by fixation or solidification
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
Abstract
The invention discloses a waste slurry dehydration and solidification treatment method, which adopts a multi-layer vacuum treatment method, wherein a plurality of layers of horizontal plastic drainage plates and a plurality of rows of vertical plastic drainage plates are paved in a slurry pool, so that the problem of insufficient treatment effect of lower-layer slurry is solved, the solidification speed is improved, the multi-layer horizontal drainage can be realized by filling and precipitating slurry in batches, and a multi-layer horizontal drainage system forms multi-layer vacuum in the slurry, so that the drainage path is shortened, and the drainage effect is better; in addition, the invention also adopts the flocculating agent to improve the vacuum dehydration effect and the consolidation speed, and simultaneously, the curing agent is added to realize the soil curing without further treatment while the vacuum dehydration is carried out; by adopting the method, the treatment speed of the waste slurry can be rapidly improved, and the solidification effect of the waste slurry can be enhanced.
Description
Technical Field
The invention relates to the technical field of slurry dehydration and solidification, in particular to a method for dehydrating and solidifying waste slurry.
Background
The engineering mud needs to be discarded after the construction is finished or the use requirement cannot be met. At present, the existing treatment modes of engineering waste slurry are tank truck transportation, on-site precipitation drying and traditional vacuum preloading treatment. The slurry transportation mode has high treatment cost and low efficiency because the engineering slurry has high yield and high water content and about 75 percent of the actually transported slurry is water. In the process of transporting the slurry outside, the condition of spilling and leaking often exists, the environmental pollution is easily caused, and tank cars and muck cars are forbidden to pass through in the main road of most cities at present, which brings great inconvenience to the transportation outside. If the method of on-site precipitation drying is adopted, a large-area mud pit needs to be built, the natural precipitation is long in consumption reduction time, the construction period progress is influenced, and the economic benefit of the project is greatly reduced. The traditional vacuum preloading processing method is optimized on the basis of natural sedimentation, the sedimentation rate is greatly improved and the dehydration of the slurry is accelerated by the vacuum preloading method, but at present, a plurality of main problems still exist in the process of applying the vacuum preloading:
1. The horizontal drainage layer usually requires a sand cushion, and the elimination of the sand cushion is easy to clog and the vacuum diffusion under the membrane is not uniform.
2. In addition, the plastic drainage plate is wound and connected with the horizontal drainage pipe or is directly inserted into the opening of the horizontal drainage pipe, so that clogging is easily caused.
3. The thickness of the combined water layer in the slurry is small, the permeability coefficient is small, and the conventional vacuum drainage is difficult.
4. The soil body after the mud is dehydrated in vacuum has weak property and can not be directly used as a filler.
5. The conventional vacuum preloading dehydration has good treatment effect on the surface layer of the mud pit, but has poor deep treatment effect.
In conclusion, when the vacuum preloading method is used for dehydrating the slurry, clogging of the interface is reduced, vacuum diffusion is more uniform, the deep drainage effect is improved, and the dehydration and solidification are carried out to form a high-strength soil body at the same time.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for dehydrating and curing waste mud. By adopting the method, the treatment speed of the waste slurry can be rapidly improved, and the solidification effect of the waste slurry can be enhanced.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention provides a waste slurry dehydration and solidification treatment method, wherein a drainage net pad and a pipe plate joint are prefabricated in advance in a factory or on site, a plurality of drainage pipe grooves for placing horizontal drainage pipes are arranged on the drainage net pad at intervals, a plurality of joint grooves for placing the pipe plate joint are arranged on the line of each drainage pipe groove at intervals, and a plurality of cuts penetrating through the bottom are formed in each joint groove; the processing method comprises the following steps:
s1, constructing a mud pit, laying a layer of non-woven geotextile at the bottom of the mud pit, laying horizontal plastic drainage plates above the non-woven geotextile at intervals, extending two ends of each horizontal plastic drainage plate out of the outer edge of the mud pit by a certain length, and laying a layer of non-woven geotextile above each horizontal plastic drainage plate;
s2, filling waste slurry into the slurry tank, pouring a flocculating agent and a curing agent into the slurry tank uniformly, starting a slurry stirrer to stir the slurry to be fully mixed, and standing for precipitation;
s3, removing the clear water on the upper layer after precipitation, laying horizontal plastic drainage plates on the surface of the precipitated slurry at intervals, wherein two ends of each horizontal plastic drainage plate extend out of the outer edge of the slurry pool for a certain length;
S4, repeating the steps S2 and S3 until the settled mud fills the mud pit;
s5, inserting a plurality of fixed steel bars around the mud pit, laying a layer of woven cloth on the surface of the waste mud, fixing the woven cloth on the fixed steel bars, and then laying a layer of non-woven geotextile above the woven cloth;
s6, laying the prefabricated drainage net pad above the non-woven geotextile, and then inserting the vertical plastic drainage plate into the bottom of the mud pool from the cut position;
s7, connecting the vertical plastic drainage plate in the joint groove with the pipe plate joint, and then connecting the pipe plate joint with the horizontal drainage pipe;
s8, connecting each horizontal drainage pipe to a horizontal drainage main pipe, wherein the horizontal drainage main pipe is connected with a vacuum pump;
s9, reversely wrapping the part of the horizontal plastic drainage plate which is reserved to exceed the edge of the mud pool above the drainage mesh pad and winding the part of the horizontal plastic drainage plate on the horizontal drainage pipe;
s10, laying a layer of non-woven geotextile above the drainage net cushion, then laying a layer of vacuum film, and pressing the periphery of the vacuum film into the slurry for sealing;
and S11, starting the vacuum pump to vacuumize.
As a preferred technical scheme of the invention, the preparation steps of the drainage mesh pad are as follows: the drainage net pad with three-dimensional net structure is formed by using filament blowing thermoplastic synthetic resin as a main raw material, extruding fine plastic filaments through a nozzle in a hot melting state, and fusing the extruded plastic filaments on nodes through a forming device.
As a preferred technical scheme of the invention, the tube plate joint at least comprises a joint tube, four horizontal joints and a vertical joint; and inserting the vertical plastic drainage plates in the joint groove into the vertical joints of the tube plate joints, inserting the four adjacent vertical plastic drainage plates into the horizontal joints, placing the horizontal drainage tubes in the drainage tube grooves, and inserting the joint tubes of the tube plate joints into the horizontal drainage tubes.
As a preferable technical scheme of the present invention, in the step S11, an intermittent pumping manner is adopted, the vacuum pump is stopped for 2 hours every 2 hours of operation on the first three days, the vacuum pump is stopped for 2 hours every 4 hours of operation on the fourth day to the sixth day, the vacuum pump is stopped for 2 hours every 10 hours of operation on the sixth day to the eighth day, and the operation is continued all day after the ninth day until the surface sedimentation rate of the waste slurry is less than 1cm per day.
As a preferred technical scheme of the invention, a vertical plastic drainage plate is cut according to the depth of a mud pit, the bottom of the plate is connected with the bottom of an upper plate for sealing, and a worker stands on a foam plate and inserts the plastic drainage plate into the bottom of the mud pit from a cut position by adopting long steel bars.
As a preferable technical scheme of the invention, the flocculating agent is a mixed solution prepared by mixing and stirring Anionic Polyacrylamide (APAM) and/or polyaluminum ferric chloride (PAFC) with water.
In a preferred embodiment of the present invention, the solidifying agent is a mixture of lime and SCA type soil solidifying agent.
As a preferable technical scheme of the invention, the position of the upper-layer horizontal plastic drainage plate corresponds to the position of the horizontal plastic drainage plate at the bottom of the mud pit.
As a preferable technical scheme of the invention, the spacing distance between the horizontal plastic drainage plates is 0.8-1.2 m.
As a preferred technical scheme of the invention, the plate bottom seal is a plastic sleeve.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the invention, a multi-layer vacuum treatment method is adopted, and a plurality of layers of horizontal plastic drainage plates and a plurality of rows of vertical plastic drainage plates are paved in the slurry tank, so that the problem of insufficient treatment effect of the lower layer of slurry is solved, the consolidation speed is improved, and the multi-layer horizontal drainage can be realized only by filling and precipitating the slurry in batches. The multilayer horizontal drainage system forms multilayer vacuum in the slurry, shortens the drainage path and has better drainage effect.
2. The invention discloses a horizontal drainage system of a mud top layer, which adopts a three-dimensional drainage net pad, wherein a drainage pipe and a plate pipe joint are embedded in the net pad to form a composite horizontal drainage layer, and one plate pipe joint can realize communication of 5 vertical plastic drainage plates, so that direct connection of vacuum and uniform distribution of top layer vacuum can be quickly realized.
3. The preparation method comprises the steps of mixing Anionic Polyacrylamide (APAM) or polyaluminum ferric chloride (PAFC) or a mixture of the Anionic Polyacrylamide (APAM) and the polyaluminum ferric chloride (PAFC) with water, stirring to prepare a mixed solution, uniformly pouring the mixed solution into a slurry tank, reacting the agent with slurry to realize flocculation precipitation and particle aggregation, forming large particle aggregates by small particles while the slurry can be rapidly precipitated, remarkably increasing the permeability coefficient, and improving the vacuum dehydration effect and the consolidation speed.
4. The quick lime and the SCA type soil curing agent are poured into the slurry to be stirred, the quick lime and the SCA type soil curing agent are used as the curing agent to react with soil particles in the slurry to reduce a combined water layer and generate a water-insoluble hard substance to be filled in a soil framework to promote soil solidification, the soil solidification is realized while the vacuum dehydration is carried out, and the waste slurry can form a soil body with certain strength after the vacuum dehydration and the solidification are finished and can be used as a filler. The waste slurry can not be directly used as a filler after being dehydrated in the conventional technology, if the waste slurry is used as the filler, a curing agent needs to be further added, but the difficulty of adding the curing agent after dehydration is very high, and the curing agent can not be added uniformly. The particle diameters of the quicklime and the SCA type soil curing agent particles are larger than the aperture of a filter membrane of the plastic drainage plate, the particles cannot run off in vacuum drainage, and the SCA type soil curing agent is a fluid, so that the timeliness of the SCA type soil curing agent can meet the requirement of vacuum treatment time, and the permeability is not influenced. And the quicklime is added to improve the permeability of the slurry.
Drawings
FIG. 1 is a schematic diagram of an exemplary cross-sectional configuration of the present invention;
FIG. 2 is a schematic top view of the drainage mat of the present invention;
FIG. 3 is a schematic view of a tube sheet joint construction of the present invention;
fig. 4 is a layout view of the vertical plastic drain board of the present invention.
Reference numerals: 1. horizontal drainage pipe, 2, vertical plastic drainage plate, 3, drainage net pad, 4, vacuum film, 5, non-woven geotextile, 6, horizontal plastic drainage plate, 7, woven fabric, 8, drainage pipe groove, 9, mud pit, 10, plate bottom seal, 11, waste mud, 12, joint groove, 13, horizontal interface, 14, vertical interface, 15, joint pipe, 16, pipe plate joint.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
The present invention will be further described with reference to the following figures 1 to 4 and examples, but the invention is not limited thereto.
As shown in fig. 2 and 3, the present embodiment is prefabricated with the drainage mat 3 and the tube sheet joint 16 in advance in a factory or on site.
The preparation method of the drainage net pad 3 comprises the following steps: the method is characterized in that filament blowing thermoplastic synthetic resin is used as a main raw material, fine plastic filaments are extruded out through a nozzle in a hot melting state, the extruded plastic filaments are welded on nodes through a forming device, a drainage mesh pad 3 with a three-dimensional net structure is formed, and the thickness of the drainage mesh pad 3 is 20-30 cm. The joint grooves 12 and the drain pipe grooves 8 are formed in the drain net pad 3 according to the designed interval, the joint grooves 12 are hexagonal, the drain pipe grooves 8 are long-strip-shaped, the thickness of the net pad at the bottom of the groove after the groove is cut is not less than 30mm, and a plurality of notches penetrating through the bottom are formed in each joint groove 12.
The preparation method of the tube plate joint 16 comprises the following steps: a plastic tube plate joint 16 is manufactured by adopting an integral hot melting process, 4 horizontal connectors 13 are horizontally arranged on the tube plate joint 16, 1 vertical connector 14 is vertically arranged, the horizontal connectors 13 and the vertical connectors 14 are sockets with rectangular cross sections, the size of the inner part of each socket is consistent with that of the cross section of the vertical plastic drainage plate 2, and a plurality of wedge-shaped bulges are distributed inside each socket.
Further, as shown in fig. 1 and 4, the present embodiment provides a method for dewatering and solidifying waste sludge, comprising the steps of:
(1) constructing a mud pit, laying a layer of non-woven geotextile 5 at the bottom of the mud pit, laying horizontal plastic drainage plates 6 on the non-woven geotextile 5, laying the horizontal plastic drainage plates 6 in parallel at a distance of 1.0m, extending two ends of each horizontal plastic drainage plate 6 out of the outer edge of the mud pit by 3.0m, and laying a layer of non-woven geotextile 5 on each horizontal plastic drainage plate 6;
(2) filling waste slurry into a slurry pool, mixing 600g of anionic polyacrylamide (APAM for short, 1000 ten thousand molecular weight) for each cubic volume of waste slurry, preparing the APAM into a solution by mixing water, and then uniformly pouring the solution into the slurry pool 9;
(3) uniformly pouring the quicklime and the SCA type soil curing agent into a mud pit, directly and uniformly pouring the quicklime and the SCA type soil curing agent into the mud pit by using 60kg of quicklime and 40kg of SCA type soil curing agent for each cubic of waste mud, starting a mud stirrer to stir the mud to fully mix the mud, and then standing for precipitation;
(4) removing the clear water on the upper layer after precipitation, laying a horizontal plastic drainage plate 6 on the surface of the precipitated slurry, wherein the position of the horizontal plastic drainage plate 6 corresponds to the position of the horizontal plastic drainage plate 6 on the bottom layer of the slurry pool, the distance is also 1.0m, and the two ends of the horizontal plastic drainage plate 6 extend out of the outer edge of the slurry pool by 3.0 m;
(5) Repeating the steps 2, 3 and 4 until the mud tank 9 is filled with the settled mud;
(6) inserting a plurality of fixed steel bars around the mud pit 9, laying a layer of woven cloth 7 on the surface of the waste mud 11, and fixing the woven cloth 7 on the fixed steel bars;
(7) a layer of non-woven geotextile 5 is laid on the woven fabric 7, and a drainage mesh pad 3 is laid on the non-woven geotextile 5;
(8) cutting the vertical plastic drainage plate 2 according to the depth of the mud pit 9, connecting the bottom of the plate with an upper plate bottom seal 10, wherein the plate bottom seal 10 is a plastic sleeve, standing a foam plate by a worker, inserting the plastic drainage plate 2 from the cut position of the drainage net pad 3 to the bottom of the mud pit 9 by adopting long steel bars, exposing the drainage net pad by 30-40 cm for the plastic drainage plate 2, and connecting the plastic drainage plate 2 with the horizontal drainage pipe 1 in the cut drainage net pad 3;
(9) inserting the vertical plastic drainage plates 2 at the positions of the joint grooves 12 into vertical joints 14 of tube plate joints 16, inserting 4 adjacent vertical plastic drainage plates 2 into horizontal joints 13, placing the horizontal drainage tubes 1 in the drainage tube grooves 8, and inserting joint tubes 15 of the tube plate joints 16 into the horizontal drainage tubes 1;
(10) connecting the horizontal drainage pipe 1 to a horizontal drainage main pipe, wherein the horizontal drainage main pipe is connected with a vacuum pump;
(11) Reversely wrapping the part of the horizontal plastic drainage plate 6 which is reserved to exceed the edge of the mud pit above the drainage mesh pad and winding the part of the horizontal plastic drainage plate on the horizontal drainage pipe 1;
(12) laying a layer of non-woven geotextile 5, then laying a layer of vacuum membrane 4, and pressing the periphery of the vacuum membrane 4 into the slurry for sealing;
(13) and starting the vacuum pump to vacuumize, stopping the vacuum pump for 2 hours every 2 hours when the vacuum pump operates in the first three days, stopping the vacuum pump for 2 hours every 4 hours when the vacuum pump operates in the fourth to sixth days, stopping the vacuum pump for 2 hours every 10 hours when the vacuum pump operates in the sixth to eighth days, and starting to continuously operate all day after the ninth day until the surface sedimentation rate of the waste slurry 11 is less than 1cm every day.
According to the description and drawings of the present invention, those skilled in the art can easily make or use the dewatering and solidifying method for waste sludge according to the present invention, and can produce the positive effects described in the present invention.
Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings.
Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. A dehydration and solidification treatment method for waste slurry is characterized in that a drainage net pad and a pipe plate joint are prefabricated in advance in a factory or on site, a plurality of drainage pipe grooves for placing horizontal drainage pipes are arranged on the drainage net pad at intervals, a plurality of joint grooves for placing the pipe plate joint are arranged on the line of each drainage pipe groove at intervals, and a plurality of notches penetrating through the bottom are formed in each joint groove; the processing method comprises the following steps:
S1, constructing a mud pit, laying a layer of non-woven geotextile at the bottom of the mud pit, laying horizontal plastic drainage plates above the non-woven geotextile at intervals, extending two ends of each horizontal plastic drainage plate out of the outer edge of the mud pit by a certain length, and laying a layer of non-woven geotextile above each horizontal plastic drainage plate;
s2, filling the waste slurry into the slurry tank, pouring a flocculating agent and a curing agent into the slurry tank in sequence, starting a slurry stirrer to stir the slurry to be fully mixed, and then standing for precipitation;
s3, removing the clear water on the upper layer after precipitation, laying horizontal plastic drainage plates on the surface of the precipitated slurry at intervals, wherein two ends of each horizontal plastic drainage plate extend out of the outer edge of the slurry pool for a certain length;
s4, repeating the steps S2 and S3 until the settled mud fills the mud pit;
s5, inserting a plurality of fixed steel bars around the mud pit, laying a layer of woven cloth on the surface of the waste mud, fixing the woven cloth on the fixed steel bars, and then laying a layer of non-woven geotextile above the woven cloth;
s6, laying the prefabricated drainage net pad above the non-woven geotextile, and then inserting the vertical plastic drainage plate into the bottom of the mud pool from the cut position;
s7, connecting the vertical plastic drainage plate in the joint groove with the tube plate joint, and then connecting the tube plate joint with the horizontal drainage pipe;
S8, connecting each horizontal drainage pipe to a horizontal drainage main pipe, and connecting the horizontal drainage main pipe with a vacuum pump;
s9, reversely wrapping the part of the horizontal plastic drainage plate which is reserved to exceed the edge of the mud pool above the drainage mesh pad and winding the part of the horizontal plastic drainage plate on the horizontal drainage pipe;
s10, laying a layer of non-woven geotextile above the drainage net cushion, then laying a layer of vacuum film, and pressing the periphery of the vacuum film into the slurry for sealing;
and S11, starting a vacuum pump to vacuumize.
2. The method for dewatering and solidifying the waste sludge as claimed in claim 1, wherein the drainage mat is prepared by the steps of: the drainage net pad with three-dimensional net structure is formed by using filament blowing thermoplastic synthetic resin as a main raw material, extruding fine plastic filaments through a nozzle in a hot melting state, and fusing the extruded plastic filaments on nodes through a forming device.
3. The method for dehydrating and solidifying the waste sludge as claimed in claim 1, wherein: the tube plate joint at least comprises a joint tube, four horizontal joints and a vertical joint; and inserting the vertical plastic drainage plates in the joint groove into the vertical joints of the tube plate joints, inserting the four adjacent vertical plastic drainage plates into the horizontal joints, placing the horizontal drainage tubes in the drainage tube grooves, and inserting the joint tubes of the tube plate joints into the horizontal drainage tubes.
4. The method for dewatering and solidifying the waste sludge according to claim 1, wherein: and S11, an intermittent air exhaust mode is adopted, the vacuum pump stops for 2 hours every 2 hours when running in the first three days, the vacuum pump stops for 2 hours every 4 hours when running in the fourth to sixth days, the vacuum pump stops for 2 hours every 10 hours when running in the sixth to eighth days, and the vacuum pump continuously runs all day after the ninth day until the surface sedimentation rate of the waste mud is less than 1cm every day.
5. The method for dewatering and solidifying the waste sludge according to claim 1, wherein: cutting the vertical plastic drainage plate according to the depth of the mud pit, connecting the bottom of the vertical plastic drainage plate with the bottom of the upper plate, sealing the bottom of the upper plate, and allowing a worker to stand on the foam plate to insert the plastic drainage plate into the bottom of the mud pit from the position of the notch by adopting long steel bars.
6. The method for dewatering and solidifying the waste sludge according to claim 1, wherein: the flocculant is a mixed solution prepared by mixing Anionic Polyacrylamide (APAM) and/or polyaluminum ferric chloride (PAFC) with water and stirring.
7. The method for dehydrating and solidifying the waste sludge as claimed in claim 1, wherein: the curing agent is a mixture of quicklime and an SCA type soil curing agent.
8. The method for dehydrating and solidifying the waste sludge as claimed in claim 1, wherein: the position of the upper-layer horizontal plastic drainage plate corresponds to the position of the bottom-layer horizontal plastic drainage plate of the mud pool.
9. The method for dehydrating and solidifying the waste sludge as claimed in claim 1, wherein: the spacing distance between each horizontal plastic drainage plate is 0.8-1.2 m.
10. The method for dehydrating and solidifying the waste sludge as claimed in claim 5, wherein: the plate bottom seal is a plastic sleeve.
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| CN113144682A (en) * | 2021-04-23 | 2021-07-23 | 龙海市仁吉建材有限公司 | Settling post-treatment method for stone powder residues after stone processing |
| CN115784490A (en) * | 2022-10-28 | 2023-03-14 | 中交第二航务工程局有限公司 | Pressurized dissolved air anti-blocking type engineering slurry rapid concentration equipment and process |
| CN115400467B (en) * | 2022-10-31 | 2023-03-24 | 山东建筑大学 | Solid-liquid separation device and method for waste slurry |
| CN116813165B (en) * | 2023-08-31 | 2023-11-28 | 北京高能时代环境技术股份有限公司 | In-situ treatment method of sludge pond |
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| CN101357817A (en) * | 2008-09-11 | 2009-02-04 | 中国科学院武汉岩土力学研究所 | Stereoscopic network drainage for accelerating water drainage consolidation velocity of hydraulic mud fill sludge |
| CN204780852U (en) * | 2015-05-22 | 2015-11-18 | 中国电建集团华东勘测设计研究院有限公司 | Three -dimensional compound geonet pad |
| CN104961270A (en) * | 2015-06-13 | 2015-10-07 | 武亚军 | Agent vacuum pre-compression method for treating engineering waste slurry |
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| CN109267562A (en) * | 2018-08-16 | 2019-01-25 | 温州大学 | The system and method that combined vacuum precompressed of flocculating handles reclaimed ground |
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