CN216711891U - In-situ dewatering and solidifying treatment device for urban domestic sludge electroosmotic tube well - Google Patents
In-situ dewatering and solidifying treatment device for urban domestic sludge electroosmotic tube well Download PDFInfo
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- CN216711891U CN216711891U CN202220129642.1U CN202220129642U CN216711891U CN 216711891 U CN216711891 U CN 216711891U CN 202220129642 U CN202220129642 U CN 202220129642U CN 216711891 U CN216711891 U CN 216711891U
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Abstract
The utility model provides an in-situ dehydration and consolidation treatment device for an electroosmosis tube well of municipal domestic sludge, which comprises an electroosmosis anode, an electroosmosis cathode and a tube well; the method is characterized in that a tube well is arranged in a sludge treatment area, and the tube well is provided with a cathode of electroosmotic drainage with a conductor, namely an electroosmotic tube well; installing an electroosmosis anode at a certain fixed distance from the pipe well in the sludge reservoir area; under the action of an electric field between the electroosmosis anode and the electroosmosis cathode after electrification, water in the sludge seeps towards the cathode direction, namely seeps into the electroosmosis tube well serving as the cathode, is filtered by the tube well and then enters the electroosmosis tube well, and then water gathered at the bottom of the electroosmosis tube well is discharged; the method combines electroosmosis drainage and tube well drainage, is safe and harmless to urban domestic sludge treatment, improves the environment, and can be used for drainage consolidation of a reclamation area for filling sea and land reclamation of soft soil foundations and seabed sludge.
Description
The technical field is as follows:
the utility model belongs to the technical field of environmental protection and treatment, and particularly relates to a treatment device for in-situ dehydration and consolidation of an electroosmosis tube well for municipal domestic sludge.
Background art:
the sludge stored in the sludge reservoir (tank) is generally sludge of a municipal sewage treatment plant, is generally built in the sewage treatment plant, and the sludge reservoir (tank) of a city is also a garbage extrusion liquid generated when garbage is compressed before solid garbage is buried, and the sewage sludge generated by the garbage extrusion liquid is generally stored and treated in the sludge reservoir built in the garbage burying field. The sludge produced in the city contains water, silt, fiber, animal and plant residues, various flocs, colloids, organic matters, microorganisms, germs, ova, heavy metals, various inorganic salts and the like, and belongs to a complex multiphase structure.
The organic carbon content of the dry sludge can reach about 45 percent generally, the organic matter content is about 80 percent, and the organic carbon content and the organic matter content of the fresh sludge are relatively higher. After the sludge in the sludge warehouse is aged for a certain time, the sludge is degraded to a certain degree, and the content of organic matters in the degraded sludge is obviously reduced. Undegraded sludge has large pollution, and if the sludge is discharged out of order, the sludge becomes a dangerous secondary pollution source, and the secondary pollution source enters a food chain through media such as atmosphere, underground water, surface water and soil, so that serious ecological risks are caused, and the human health is influenced.
The sludge stored in the sludge warehouse is subjected to long-time biochemical reaction and a large amount of rainwater enters, the water content of the sludge generally exceeds 90% (according to survey data of a certain sludge warehouse in a city, the water content of the sludge is 200-760%, the average water content is about 525%, the density distribution range is 0.97-1.12 g/cm3, the average water content is about 1.03g/cm 3), the surface layer and the deep part are soft plastic layers, and the middle part is mostly a flow plastic layer. The sludge storage of the refuse landfill is generally located in a low-lying place or a core area, so that the use of the sludge storage capacity is often restricted, and the sludge storage capacity needs to be recovered through treatment.
At present, the formed sludge reservoir is generally cleaned by sludge and is disposed in different places; or cofferdam reinforcement is carried out on the periphery of the landfill sludge area to ensure the stability of the sludge landfill area; and traditional environmental engineering treatment methods such as re-burying the sludge after stirring and solidifying. However, since the sludge in the sludge storage is almost in a flowing plastic shape, it is difficult to perform excavation by mechanical excavation, and the remote disposal of the taken-out sludge is often difficult to perform due to site conditions, secondary pollution, and the like.
Although, many studies are currently conducted on the treatment method for sludge in-situ dehydration and consolidation in a large-area sludge reservoir, for example, the Chinese patent numbers are: ZL201210105625.5 discloses a vacuum in-situ consolidation treatment method and device for large-area municipal domestic sludge. The working cushion layer (medium coarse sand, the Jingba layer and the geotextile) with the thickness of about half a meter is added on the upper part of the sludge, so that the cost is higher, a large amount of effective use space of a sludge warehouse is occupied, impurity components are added to the final sludge solidification body, and the comprehensive utilization value of the sludge solidification body is reduced. Meanwhile, unsafe factors and hidden dangers in the aspect of operation also exist, for example, the density of the added working layer is greater than that of the lower sludge layer, the large-area working layer floating on the sludge is difficult to form uniform downward pressure, the working layer basically has no bending resistance and shearing resistance, loose sand is arranged inside the working layer, and when the downward pressure of the working layer is not uniform due to uneven load added to the working layer and the failure of a vacuum pre-pressing individual vacuum pump, the risk of integral overturning is possibly caused. Therefore, the method is difficult to perform good and effective treatment on the sludge in the sludge reservoir through in-situ dehydration and consolidation.
Therefore, how to carry out effective in-situ dehydration, consolidation and strengthening treatment on the sludge in the large-area sludge pond to recover the storage capacity of a field, prolong the service cycle and save the sludge treatment cost is a common problem and a great technical problem which needs to be solved urgently in the municipal sludge treatment.
The utility model content is as follows:
the utility model aims to solve the problems of sludge treatment of a sludge reservoir generated by the existing municipal waste and sewage treatment and provide the in-situ dehydration consolidation treatment device for the municipal domestic sludge electroosmotic tube well, which is feasible, safe, harmless and low in operation cost.
In order to realize the purpose of the utility model, the utility model adopts the technical scheme that:
an in-situ dehydration and consolidation treatment device for an electroosmosis tube well of municipal domestic sludge comprises an electroosmosis anode, an electroosmosis cathode, a tube well, a submersible pump and a drainage pipe; the method is characterized in that: installing a tube well in the sludge treatment area, wherein the tube well is provided with an electroosmosis cathode of electroosmosis drainage with a conductor, namely the electroosmosis tube well; the electroosmosis anode is arranged in sludge in a sludge reservoir area around the tube well; wherein: under the action of the electric field between the electroosmosis anode and the cathode after electrification, water in the sludge seeps towards the electroosmosis cathode, namely seeps into the electroosmosis tube well serving as the cathode; water in sludge: the water collected at the bottom of the electroosmosis tube well is discharged through a submersible pump arranged at the bottom of the tube well and a drain pipe connected with the submersible pump and communicated with the outside of the sludge treatment area.
The electroosmosis tube well also comprises a well support, namely a concrete plate, which is arranged at the bottom of the electroosmosis tube well and the sludge.
The well mouth of the electroosmosis tube well is 0.3-0.5 m higher than the sludge surface.
And a plurality of electroosmosis tube wells and matched anodes thereof are arranged in the sludge treatment area, and the electroosmosis tube wells and the electroosmosis anodes are arranged in a square shape.
The well pipe of the electroosmosis pipe well is a concrete prefabricated component, and the water seepage part is a water seepage well pipe; the water seepage well pipe is a filtering water layer consisting of a conductive net or a conductive wire winding layer and a nylon net or a cotton-flax winding layer from bottom to top; the conductive net or the conductive wire winding layer is also used as an electroosmosis cathode; and the bamboo chips are firmly bound by the whole length from bottom to top.
Compared with the prior art, the utility model has the following substantial characteristics and remarkable effects:
1. when the electroosmosis tube well works, the submersible pump is positioned at the bottom of the tube well, the above part of the submersible pump is in a waterless state, and the submersible pump can be kept for a long time and operated intermittently until the sludge in the whole sludge storage becomes a solidification body meeting the requirement.
2. When the electroosmosis tube well works, the hollow anhydrous tube well can be used as a sludge storage exhaust hole to timely discharge gas generated by sludge degradation.
3. Except the material of the electroosmosis tube well, no other additive exists, which not only overcomes the defects of the prior patent technology that the effective space is occupied by squeezing and a large amount of material is input, but also creates ideal conditions for the comprehensive utilization of the final sludge consolidation body (about 45 percent of organic carbon content and about 80 percent of organic matter content), has good economic efficiency, and saves the cost by not less than 20 percent compared with the cost.
4. During the operation of the electroosmosis tube well, no water exists in the tube well, and the electroosmosis tube well has the vacuum preloading drainage function while electroosmosis drainage is performed.
5. The sludge dehydration and solidification are carried out from bottom to top, and the treatment process is safe and reliable.
6. Aiming at the sludge stratum with small hydraulic permeability coefficient, the electroosmosis method for consolidation has the electroosmosis coefficient which is 1-2 orders of magnitude larger than the hydraulic permeability coefficient, and the efficiency of sludge dewatering consolidation can be effectively improved.
The utility model is different from the existing new method for the in-situ dehydration, consolidation and strengthening treatment of the sludge in the sludge warehouse, can recover the storage capacity of the site, prolong the service cycle and save the sludge treatment cost. Can solve the long-term technical problem encountered in municipal sludge treatment.
The utility model can expand the application range, not only can treat the sludge reservoir, but also can be used for the drainage consolidation of the hydraulic filling area of the reclamation of the soft soil foundation and the seabed sludge.
Drawings
FIG. 1 is a schematic view of a single-component electroosmotic tubing well of the present invention.
In the figure: the device comprises an electroosmosis anode 1, sludge 2, a waterproof cable 3, a cathode cable 4, a drain pipe 5, a sludge surface 6, a water seepage well 7, an electroosmosis cathode 8 (bamboo chips, iron wires and nylon nets), a submersible pump 9, a well support 10, a sludge reservoir bottom 11 and a water level 12 in the pipe well.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
In-situ dewatering and solidifying treatment device for urban domestic sludge electroosmosis tube well
As shown in fig. 1, an in-situ dehydration and consolidation treatment device for an electroosmosis tube well of municipal domestic sludge comprises an electroosmosis anode 1, a drain pipe 5, an electroosmosis cathode 8, a submersible pump and a tube well; installing a tube well in the sludge 2 treatment area, wherein the tube well is provided with an electroosmosis cathode of electroosmosis drainage with a conductor, namely an electroosmosis tube well 7; the electroosmosis anode is arranged in sludge in a sludge reservoir area around the tube well; wherein: under the action of the electric field between the electroosmosis anode and the cathode after electrification, water in the sludge seeps towards the electroosmosis cathode, namely the electroosmosis tube well serving as the cathode; water in sludge: the water collected at the bottom of the electroosmosis tube well is discharged through a submersible pump arranged at the bottom of the tube well and a drain pipe connected with the submersible pump and communicated with the outside of the sludge treatment area.
The electroosmosis tube well also comprises a well support arranged at the bottom of the electroosmosis tube well and the sludge, namely a concrete well support 10.
The well mouth of the electroosmosis tube well is 0.3-0.5 m higher than the sludge surface.
And a plurality of electroosmosis tube wells and matched anodes thereof are arranged in the sludge treatment area, and the electroosmosis tube wells and the electroosmosis anodes are arranged in a square shape.
The electroosmosis pipe well is a pipe well, and the well pipe of the pipe well is generally a concrete prefabricated part or made of other materials meeting the requirements.
The well pipe of the electroosmosis pipe well is a concrete prefabricated component, and the water seepage part is a water seepage well pipe 7; the water seepage well pipe is a filtering water layer consisting of a conductive net or a conductive wire winding layer and a nylon net or a cotton-flax winding layer from bottom to top; the conductive net or the conductive wire winding layer is also used as an electroosmosis cathode; and the bamboo chips are firmly bound by the whole length from bottom to top.
The electrodes described above are made of various conductors, i.e., a negative (negative) electrode and a positive (positive) electrode, and may be made of a composite material of metal, carbon fiber, carbon black, a conductive filled polymer, metal fiber, or the like. Can be formed by winding conductive wires, conductive nets, conductive geotextiles and the like.
In-situ dewatering consolidation treatment and construction method for urban domestic sludge electroosmosis tube well
The utility model relates to an in-situ dehydration consolidation treatment and construction method of an electroosmosis tube well for municipal domestic sludge, which is a treatment method combining electroosmosis drainage and tube well drainage in a sludge treatment area, and comprises the following steps:
installing a tube well in the sludge treatment area, wherein the tube well is set as an electroosmosis cathode (negative) electrode of electroosmosis drainage, namely an electroosmosis tube well; installing an electroosmosis anode (positive) at a certain fixed distance from a pipe well in sludge in a sludge reservoir area;
under the action of the electric field between the electroosmotic anode and the electroosmotic cathode after electrification, water in the water-containing sludge seeps towards the cathode direction, namely seeps into the electroosmotic tube well serving as the cathode, and the water in the sludge: the water collected at the bottom of the electroosmosis tube well is discharged through a submersible pump arranged at the bottom of the tube well and a drain pipe connected with the submersible pump and communicated with the outside of the sludge treatment area.
The specific construction process steps of the in-situ dehydration and consolidation treatment of the electroosmosis tube well of the municipal domestic sludge are as follows:
step 1: constructing and installing an electroosmosis tube well in the sludge treatment area according to design requirements; and installing and connecting an electroosmosis cathode (negative) pole;
and 2, step: a submersible pump 9 is installed at the bottom in the electroosmosis tube well, a drain pipe 5 is laid along the periphery of the sludge reservoir, and a drain system is installed;
and step 3: an electro-seepage anode (anode) 1 is arranged in a sludge treatment area;
and 4, step 4: debugging the electroosmosis anode and the electroosmosis cathode before electroosmosis water operation and the drainage of the submersible pump;
and 5: electrifying to perform electroosmosis water operation, starting the submersible pump after the bottom gathered seepage water in the electroosmosis tube well reaches a set amount, and performing pumping and drainage operation;
step 6: monitoring and detecting, and judging whether the sludge consolidation condition meets the sludge treatment index and design requirements;
and 7: if the sludge treatment index and the design requirement are not met, the step 5 can be continued until the sludge treatment index and the design requirement are met.
Wherein: the step 4: debugging the electroosmosis anode and the electroosmosis cathode before electroosmosis water operation and the drainage of the submersible pump; the system can also be matched with an automatic control system for electric water seepage and submersible pump drainage, and is debugged in advance.
The preferable technical scheme is as follows:
in the step 1, the installation of the electroosmotic tube well is a key process, and as shown in fig. 1, the construction and installation of the single-component electroosmotic tube well need to achieve the following points:
1. the construction of the electroosmosis tube well on the sludge surface 6 needs to use a movable overwater operation platform, can be manufactured by connecting a plurality of empty oil barrels, and is pulled to move by a winch.
2. The sludge is in a flow plastic and soft plastic state, and the hole forming of the pipe well can adopt a punching method, and the diameter of the formed hole is about phi 450 mm; the sludge in a non-flowing plastic state can also be formed by a mechanical pore-forming mode, the aperture is properly increased to be about phi 600mm, and a layer of thin sand bags can be uniformly wrapped outside a sand-free well pipe to form a well synchronously.
3. The water seepage well pipe 7 of the electroosmosis pipe well can adopt a cement gravel filter pipe or a cement pipe with a filter hole, the outer diameter phi of the water seepage well pipe is about 400mm, the inner diameter phi of the water seepage well pipe is about 300mm, and the wall thickness of the well pipe meeting the requirements is provided, namely: the total weight of the control well pipe is larger than the total buoyancy generated by the sludge volume of the electroosmotic pipe well (when no water exists in the electroosmotic pipe well) discharged by the sludge 2, and a certain safety coefficient is provided.
4. When the electroosmosis tube well is put into the electroosmosis tube well, a well support 10 is needed, and the water seepage tube well of the electroosmosis tube well is firmly bound by the bamboo chips which are added along the length from bottom to top; spirally winding 10# iron wire (conductive wire) from bottom to top as an electroosmosis cathode (negative) electrode connected with the negative electrode of a direct current power supply; nylon gauze with about 120 meshes is wrapped from the bottom (including the bottom 11 of the well support) to the top and is firmly bound. The well mouth of the electroosmosis tube well is 0.3-0.5 m higher than the sludge surface.
5. And a complete submersible pump 9 is put into the bottom of the electroosmosis tube well.
6. Connecting a submersible pump power supply, connecting a submersible pump drain pipe 5 to a drain main pipe, and configuring an automatic drain control system.
7. Installing an electroosmosis anode according to design, wherein the electroosmosis anode consists of a steel bar and a waterproof cable 3, inserting the steel bar and part of the waterproof cable into the bottom of the sludge reservoir by adopting a water flushing method, and keeping a horizontal distance of about 5m from a pipe well, and connecting the waterproof cable with the positive electrode of a direct-current power supply; the first test electroosmotic tube well may have electroosmotic anodes positioned at different distances from the electroosmotic tube well for use in preparing electroosmotic tests.
In the step 2, a main drainage pipe is arranged along the periphery of the sludge reservoir, preferably a steel pipe with the diameter of 160 mm-200 mm, and a one-way valve connecting pipe matched with the submersible pump 9 and the drainage pipe 5 is arranged.
In the step 3, after the first electroosmotic tube well is constructed, test pumping operation is carried out, the water yield is tested when electroosmosis operation is not started, the water yield is tested after the electroosmosis operation of the anode electrode is started at different distances, electroosmosis voltage is increased gradually after the electroosmosis operation of the anode electrode is started, a proper electrode distance and electroosmosis voltage are selected, the water yield of the submersible pump is selected to be slightly larger than the water yield of the electroosmotic tube well, and the water level 12 in the electroosmotic tube well is controlled to be in a well bottom state.
In the step 4, the electroosmosis tube well and the electroosmosis anode in the sludge reservoir area are arranged in a square shape; the pipe well spacing is 5-10 m, the row spacing is 5-10 m, and the pipe well spacing is determined according to the first well test result. The drain pipe of the submersible pump is made of transparent flexible plastic pipe so as to observe the water outlet condition.
In the step 5, in the electroosmosis operation and electroosmosis tube well water pumping maintenance process, all-weather duty operation of workers is needed, the electroosmosis tube well water pumping condition and the electroosmosis current change condition are known and mastered in time, the work record is made, and the abnormal condition is found and processed in time; during the operation, the continuous dumping of the sludge in the sludge storage is not influenced.
In the step 6, the change of physical and mechanical indexes before and after the sludge treatment is analyzed by means of process monitoring and post-construction detection, and whether the design requirements are met or not is judged. The monitoring contents include but are not limited to surface settlement observation, soil body horizontal displacement observation (inclinometer), pore water pressure test and layered settlement test; the detection contents include, but are not limited to, a borehole soil sampling indoor test, a static cone penetration test and a cross plate shearing test. Design requirements generally combine sludge treatment engineering objectives and site recovery use requirements, including but not limited to post-treatment sludge strength indicators, stability control requirements, and sludge settling volume requirements.
In the step 6, if the design requirement is not met, the operation of the step 5 can be continued.
The in-situ dehydration and consolidation treatment method for the municipal domestic sludge electroosmosis tube well improves the environment after sludge consolidation treatment, can comprehensively utilize sludge, can prepare organic fertilizer and the like, and turns the harm into the treasure.
The in-situ dehydration consolidation treatment method for the urban domestic sludge electroosmosis vertical shaft can expand the application range, not only can treat a sludge reservoir, but also can be used for drainage consolidation of a reclamation area for filling sea and land with soft soil foundation and seabed sludge.
Claims (5)
1. An in-situ dehydration and consolidation treatment device for an electroosmosis tube well of municipal domestic sludge comprises an electroosmosis anode, an electroosmosis cathode, a tube well, a submersible pump and a drain pipe; the method is characterized in that: installing a tube well in the sludge treatment area, wherein the tube well is provided with an electroosmosis cathode of electroosmosis drainage with a conductor, namely the electroosmosis tube well; the electroosmosis anode is arranged in sludge in a sludge reservoir area around the tube well; wherein: under the action of the electric field between the electroosmosis anode and the cathode after electrification, water in the sludge seeps towards the electroosmosis cathode, namely seeps into the electroosmosis tube well serving as the cathode; water in sludge: the water collected at the bottom of the electroosmosis tube well is discharged through a submersible pump arranged at the bottom of the tube well and a drain pipe connected with the submersible pump and communicated with the outside of the sludge treatment area.
2. The municipal sludge electroosmotic tube well in-situ dewatering and consolidating treatment device according to claim 1, wherein: the electroosmosis tube well also comprises a well support arranged at the bottom of the electroosmosis tube well and the sludge, namely a concrete well support.
3. The municipal sludge electroosmotic tube well in-situ dewatering and consolidating treatment device according to claim 1, wherein: the well mouth of the electroosmosis tube well is 0.3-0.5 m higher than the sludge surface.
4. The municipal sludge electroosmotic tube well in-situ dewatering and consolidating treatment device according to claim 1, wherein: and a plurality of electroosmosis tube wells and matched anodes thereof are arranged in the sludge treatment area, and the electroosmosis tube wells and the electroosmosis anodes are arranged in a square shape.
5. The device for in-situ dehydration and consolidation of the municipal sludge electroosmotic tube well according to claim 1, wherein: the well pipe of the electroosmosis pipe well is a concrete prefabricated component, and the water seepage part is a water seepage well pipe; the water seepage well pipe is a filtering water layer consisting of a conductive net or a conductive wire winding layer and a nylon net or a cotton-flax winding layer from bottom to top; the conductive net or the conductive wire winding layer is also used as an electroosmosis cathode; and the bamboo chips are firmly bound by the whole length from bottom to top.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220129642.1U CN216711891U (en) | 2022-01-18 | 2022-01-18 | In-situ dewatering and solidifying treatment device for urban domestic sludge electroosmotic tube well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220129642.1U CN216711891U (en) | 2022-01-18 | 2022-01-18 | In-situ dewatering and solidifying treatment device for urban domestic sludge electroosmotic tube well |
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| CN216711891U true CN216711891U (en) | 2022-06-10 |
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| CN202220129642.1U Withdrawn - After Issue CN216711891U (en) | 2022-01-18 | 2022-01-18 | In-situ dewatering and solidifying treatment device for urban domestic sludge electroosmotic tube well |
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| CN (1) | CN216711891U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114249521A (en) * | 2022-01-18 | 2022-03-29 | 内蒙古嘉盈建设工程有限公司 | In-situ dewatering and solidifying treatment method and device for urban domestic sludge electroosmosis tube well |
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2022
- 2022-01-18 CN CN202220129642.1U patent/CN216711891U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114249521A (en) * | 2022-01-18 | 2022-03-29 | 内蒙古嘉盈建设工程有限公司 | In-situ dewatering and solidifying treatment method and device for urban domestic sludge electroosmosis tube well |
| CN114249521B (en) * | 2022-01-18 | 2023-12-22 | 内蒙古嘉盈建设工程有限公司 | In-situ dewatering and solidifying treatment method and device for electroosmosis tube well of municipal domestic sludge |
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