CN216765832U - In-situ consolidation treatment device for large-diameter vacuum pipe well of municipal domestic sludge - Google Patents
In-situ consolidation treatment device for large-diameter vacuum pipe well of municipal domestic sludge Download PDFInfo
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- CN216765832U CN216765832U CN202220127563.7U CN202220127563U CN216765832U CN 216765832 U CN216765832 U CN 216765832U CN 202220127563 U CN202220127563 U CN 202220127563U CN 216765832 U CN216765832 U CN 216765832U
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Abstract
The utility model relates to an in-situ consolidation treatment device for a large-caliber vacuum pipe well of municipal domestic sludge, which comprises a pipe well, a submersible pump and a drain pipe, and is characterized by also comprising a well cover, an air suction pipe, a sealing device and a well support; the pipe well is inserted into the sludge in the sludge warehouse until the bottom of the sludge, the pipe well is composed of a solid-wall well pipe and a water filtering well pipe, the well cover is provided with a sealing device for sealing the pipe well, and the well support is arranged at the bottom of the pipe well and the sludge; the submersible pump is arranged at the bottom in the pipe well, the urban sludge in-situ dehydration and consolidation treatment device is used for vacuumizing the pipe well by adopting a plurality of eye pipe well vacuum methods, water in sludge in the sludge storage is promoted to seep to the bottom of the well pipe through the filter screen layer outside the water filtering pipe of the pipe well by using the vacuum pump and the air suction pipe, and the water seeped to the bottom of the well pipe is discharged through the submersible pump and the water drainage pipe, so that the sludge in-situ dehydration and consolidation treatment is realized. The method has the advantages of simple device and construction process, easy operation, safe use and easy popularization.
Description
The technical field is as follows:
the utility model belongs to the technical field of environmental protection and treatment, and particularly relates to an in-situ consolidation treatment device for a large-diameter vacuum pipe well for municipal domestic sludge.
The background art comprises the following steps:
at present, sludge stored in a sludge warehouse (tank) is generally sludge of an urban sewage treatment plant, and the general sludge warehouse is built in the sewage treatment plant; there are also cities which produce liquid from the squeezed waste produced when compressing waste prior to landfill of solid waste, thus building sludge depots in landfill sites nearby. As a byproduct in the process of treating municipal waste and sewage, the sludge contains water, silt, fiber, animal and plant residues, various flocs, colloid, organic matters, microorganisms, germs, worm eggs, heavy metals, various inorganic salts and the like, and belongs to a complex multiphase structure.
The organic carbon content in the dry sludge can generally reach about 45 percent; 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 a large pollution, and if the sludge is discharged out of order, the sludge becomes a dangerous secondary pollution source. These secondary sources of pollution enter the food chain through atmospheric, ground water, surface water and soil, etc. media, causing serious ecological risks and affecting the health of people around.
The sludge stored in the sludge reservoir is subjected to long-time biochemical reaction and a large amount of rainwater enters, the water content generally exceeds 90% (according to survey data of a certain sludge reservoir in a metropolis, the water content of the sludge is 200-760%, the average water content is about 525%, and the density distribution range is 0.97-1.12 g/cm3Middle, average 1.03g/cm3Left and right), the surface layer and the deep part are soft plastic layers, and the middle part is mostly a flow plastic layer. The sludge reservoir of the refuse landfill is generally located in a low-lying place or a core area, the use of the sludge reservoir capacity is often restricted, and the sludge reservoir capacity needs to be recovered through treatment. 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 sludge-filled area to ensure the stability of the sludge-filled area, and the sludge is stirred and solidified and then is filled again. However, since the sludge in the sludge storage is almost in a flowing plastic state, it is difficult to perform excavation by mechanical excavation, and the taken-out sludge is disposed at different places, and it is often difficult to perform the excavation due to factors such as site conditions and secondary pollutionNow.
Although, many studies are currently conducted on the treatment method for sludge in-situ dehydration and consolidation in the large-area sludge reservoir of the city, 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 sludge warehouse, prolong the service life 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 encountered in municipal sludge treatment and provides the pipe well vacuum method in-situ dehydration consolidation treatment device for municipal sludge, which has the advantages of simple construction process, easy operation, safe use and easy popularization.
The purpose of the utility model is realized as follows:
the utility model provides a city domestic sludge heavy-calibre vacuum tube well normal position consolidation processing apparatus, includes tube well 1, immersible pump 2, drain pipe, its characterized in that: the well cover is also provided with a well cover 3, a drain pipe joint 4, an air suction pipe joint 5, an air suction pipe 6, a sealing device 7 and a well support 8; the pipe well is inserted into the sludge in the sludge warehouse and reaches the bottom 9 of the sludge, the pipe well is composed of a solid-wall well pipe 101 and a water filter well pipe 102, the solid-wall well pipe is arranged on the water filter pipe of the pipe well, most of the solid-wall well pipe is exposed above the set stable sludge surface 10 of the sludge warehouse, and only a small part of the solid-wall well pipe is buried below the set stable sludge surface of the sludge warehouse; the well cover is provided with a sealing device and is arranged at the mouth of the solid-wall well to seal the pipe well; the well support is arranged at the bottom of the pipe well and the sludge; the submersible pump is arranged at the bottom in the pipe well, is connected with the water drainage pipe and is used for draining water from the bottom of the pipe well outwards; wherein:
a filter screen layer 11 is arranged outside the water filter pipe well;
the drainage pipe joint and the air suction pipe joint are arranged on the sealed well cover, the drainage pipe comprises a pipe well inner drainage pipe 401 and a pipe well outer drainage pipe 402 and is connected into a whole through the drainage pipe joint, and the air suction pipe joint is used for connecting an air suction pipe and a vacuum pump.
The solid-wall well pipe 101 is mostly exposed on a stable sludge surface 10 set by the sludge warehouse, and the well mouth of the solid-wall well pipe is 0.3-0.5 m higher than the sludge surface.
The well casing of the pipe well is firmly wound and bound by the long bamboo sheets, the iron wires and the multilayer nylon nets to form a filter screen layer, and the whole-hole pipe well has good integrity.
Compared with the prior art, the utility model has the following substantial characteristics and remarkable effects:
the device and the construction process method are simple, easy to operate, safe to use and easy to popularize, and have the following characteristics:
1. when the pipe well works, the submersible pump is positioned at the bottom of the pipe well, the submersible pump is in a water-free state, and the pipe well of the pipe well has good integrity under the firm winding and binding of the through bamboo sheets, the iron wires and the multilayer nylon nets.
2. When the pipe well works, the hollow anhydrous pipe well can be used as a sludge storage exhaust hole to timely exhaust gas generated by sludge degradation, and an open system is more favorable for safety in the sludge treatment process.
3. Except for the material of the pipe well, no other additive exists, which not only overcomes the defects of the prior art that the effective space of the reservoir area 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 (the organic carbon content is about 45 percent and the organic matter content is about 80 percent).
4. Has good economic efficiency and the cost saving is not less than 20 percent. Is rational for the comprehensive utilization of the sludge consolidation body.
5. During the operation of the pipe well, no water exists in the pipe well, and the dual functions of vacuum suction and pressure drainage are achieved.
6. The used vacuum pump only pumps air and does not pump water, and any type of vacuum pump can be used, so that the selectivity is stronger.
The utility model is different from the existing new method for the in-situ dehydration consolidation strengthening treatment of the sludge in the sludge warehouse, can recover the warehouse of the sludge warehouse, prolong the service cycle and save the cost of sludge treatment. Solves 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.
Description of the drawings:
FIG. 1 is a schematic view of a single well installation by tube well vacuum method.
Fig. 2 is a schematic view of a tube well sealing well cover.
In the figure: the device comprises a pipe well 1, a submersible pump 2, a well cover 3, a drain pipe joint 4, an air suction pipe joint 5, an air suction pipe 6, a sealing device 7, a well support 8, sludge till the bottom 9 of the sludge, a solid well pipe 101, a water filtration well pipe 102, a sludge surface 10, a filter screen layer 11, an inner drain pipe 401, a pipe well outer drain pipe 402, a submersible pump sealing cable penetrating line 12 and a pipe well inner water level 13.
The specific implementation mode is as follows:
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.
Pipe well vacuum method municipal sludge in-situ dehydration consolidation treatment device
As shown in fig. 1-2, the in-situ consolidation treatment device for the urban domestic sludge large-caliber vacuum tube well comprises a tube well 1, a submersible pump 2, a drain pipe, a well cover 3, a drain pipe joint 4, an air suction pipe joint 5, an air suction pipe 6, a sealing device 7 and a well support 8; the pipe well is inserted into the sludge in the sludge warehouse and reaches the bottom 9 of the sludge, the pipe well is composed of a solid-wall well pipe 101 and a water filter well pipe 102, the solid-wall well pipe is arranged on the water filter pipe of the pipe well, most of the solid-wall well pipe is exposed above the set stable sludge surface 10 of the sludge warehouse, and only a small part of the solid-wall well pipe is buried below the set stable sludge surface of the sludge warehouse; the well cover is provided with a sealing device and is arranged at the mouth of the solid-wall well to seal the pipe well; the well support is arranged at the bottom of the pipe well and the sludge; the submersible pump is arranged at the bottom in the pipe well, is connected with the water drainage pipe and is used for draining water from the bottom of the pipe well outwards; wherein:
and a filter screen layer 11 is arranged outside the water filter pipe well.
The drainage pipe joint and the air suction pipe joint are arranged on the sealed well cover, the drainage pipe comprises a pipe well inner drainage pipe 401 and a pipe well outer drainage pipe 402 and is connected into a whole through the drainage pipe joint, and the air suction pipe joint is used for connecting an air suction pipe and a vacuum pump.
The solid-wall well pipe 101 is mostly exposed on a stable sludge surface 10 set by the sludge warehouse, and the well mouth of the solid-wall well pipe is 0.3-0.5 m higher than the sludge surface.
The well casing of the pipe well is firmly wound and bound by the long bamboo sheets, the iron wires and the multilayer nylon nets to form a filter screen layer, and the whole-hole pipe well has good integrity.
In-situ consolidation construction and treatment method for large-diameter vacuum pipe well of municipal domestic sludge
The utility model relates to an in-situ consolidation treatment method for a large-diameter vacuum pipe well of municipal domestic sludge, which adopts a plurality of pipe well vacuum method municipal sludge in-situ dehydration consolidation treatment devices, and uses a vacuum pump and an air suction pipe to suck vacuum in the pipe well, so that water in sludge in a sludge storage is enabled to seep to the bottom of a well pipe through a filter screen layer outside a water filter pipe of the pipe well, and the water seeped to the bottom of the well pipe is discharged through a submersible pump and a water drainage pipe, thus realizing the in-situ dehydration consolidation treatment of the sludge.
Forming a drain pipe in the sludge treatment area according to design requirements, installing a pipe well in a well, installing a submersible pump in the pipe well, starting the pump to pump water, starting a vacuum pump to operate, and maintaining the operation of pumping water; the concrete construction steps are as follows:
step 1, laying drainage pipes along the periphery of a sludge warehouse;
and 7, if the sludge treatment index is not reached, continuing to the step 5 until the sludge treatment index reaches the design requirement.
The following are preferred embodiments
In the step 1, 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 a submersible pump and a drainage pipe is arranged.
In the step 2, the construction and installation of the pipe well are key processes, and the construction and installation of the combination of a single pipe well and a vacuum pump need the following points:
a movable overwater operation platform is needed for constructing a pipe well on a sludge surface, a plurality of empty oil barrels can be connected for manufacturing, and a winch is used for pulling and shifting.
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 600mm, and when a well pipe is put into the well pipe, a layer of thin sand bag can be uniformly wrapped outside the sand-free well pipe to form a well synchronously.
The water filtering well pipe is a water filtering well pipe made of cement gravel or a water filtering well pipe with a water filtering hole, the outer diameter of the pipe is about 400mm, and the inner diameter of the pipe is about 300 mm; the wall thickness of the filter well pipe is met, namely: the total weight of the control pipe well is greater than the total buoyancy generated by the sludge to the volume of the sludge discharged from the pipe well, and a certain safety factor is provided. The pipe well with about 1 m upper part is a solid wall pipe, and a rubber sleeve (or a plurality of layers of sealing tapes are wound) is sleeved outside the pipe well to prevent air leakage.
When the well pipe is put into the well pipe, a well support is needed, and the well pipe is long from bottom to top and is firmly bound by bamboo chips; the nylon gauze with about 120 meshes is wrapped from the bottom (including the bottom of the well support) to the top and is firmly bound. The well mouth of the pipe well is 0.3-0.5 m higher than the sludge surface.
And 3, installing a submersible pump in the pipe well, and installing a sealing well cover.
(1) And (5) putting a complete submersible pump to the bottom of the pipe well.
(2) The well lid is sealed to the installation tube well, needs the suitable rubber sleeve of cable overcoat when immersible pump cable conductor 12 passes well lid threading pipe to reach sealed effect.
(3) And connecting a submersible pump power supply and a submersible pump drain pipe to the main drain pipe.
(4) The step 4: the pipe well submersible pump is used for pumping water in a debugging mode, and the pipe well is connected with the vacuum pump for debugging.
(5) The water outlet quantity of the submersible pump needs to be slightly larger than the water inlet quantity of the pipe well, so that the water level 13 in the water level pipe well in the pipe well is not higher than the submersible pump (the submersible pump can be selected to pump water continuously during working, and an automatic water level control device can also be selected to be additionally arranged) during working, and the maximum water seepage pressure in the pipe well is ensured.
(6) And 5, constructing and installing a pipe well and a vacuum pump according to the design scheme, operating the vacuum pump, and pumping water from the pipe well. And determining the spacing and the number of the pipe wells, the well arrangement mode and the specification and the model of the vacuum pump and the submersible pump according to field tests, daily warehousing sludge amount of a sludge warehouse and related requirements.
(7) The installation of the pipe well is carried out according to the mode of the step 2, wherein the bottom of the solid-wall well pipe is controlled to enter a stable sludge surface; the pipe well is generally arranged in a square or regular triangle; according to actual conditions, the vacuum pump can be connected to drive one pipe well and can also be connected with a plurality of pipe wells.
(8) During drainage operation, construction managers should continuously watch the water, and problems are timely solved. The drainage operation can also be carried out intermittently according to the actual situation, and the requirement that the storage capacity of the sludge is basically balanced with the storage capacity generated by dehydration and consolidation is met. The dehydration consolidation process is carried out in the dynamic balance for a long time until the sludge in the whole sludge reservoir completely reaches the design consolidation standard.
(9) 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 content comprises but is not limited to a borehole soil sampling indoor test, a static sounding 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.
(10) In the step 6, if the design requirement is not met, the operation of the step 5 can be continued.
Because each well pipe is firmly wound and bound by the through long bamboo chips, the iron wires and the multilayer nylon nets to form a filter screen layer, the whole-hole pipe well has good integrity; therefore, the pipe well is fixed at the bottom like a ship anchored at the bottom of the sludge storage, the upper part of the pipe well can swing within a certain range, and the pipe well can be automatically adjusted to the center. Therefore, during the sludge consolidation treatment, the sludge can be poured and stored at any time along with the gradual decline of the sludge surface; the pipe well can automatically adjust the displacement of the upper part of the pipe well caused by the surging of the sludge when the sludge is poured into the warehouse.
The device is more suitable for long-term retention and intermittent operation until the sludge in the whole sludge storage becomes a solidification body meeting the requirements.
Claims (3)
1. The utility model provides a city domestic sludge heavy-calibre vacuum tube well normal position consolidation processing apparatus, includes tube well (1), immersible pump (2), drain pipe, its characterized in that: the well cover is characterized by also comprising a well cover (3), a drain pipe joint (4), an air suction pipe joint (5), an air suction pipe (6), a sealing device (7) and a well support (8); the pipe well is inserted into the sludge in the sludge warehouse and reaches the bottom (9) of the sludge, the pipe well is composed of a solid-wall well pipe (101) and a water filtering well pipe (102), the solid-wall well pipe is arranged on the water filtering pipe of the pipe well, most of the solid-wall well pipe is exposed above the set stable sludge surface (10) of the sludge warehouse, and only a small part of the solid-wall well pipe is buried below the set stable sludge surface of the sludge warehouse; the well cover is provided with a sealing device and is arranged at the mouth of the solid-wall well to seal the pipe well; the well support is arranged at the bottom of the pipe well and the sludge; the submersible pump is arranged at the bottom in the pipe well, is connected with the water drainage pipe and is used for draining water from the bottom of the pipe well outwards; wherein:
a filter screen layer (11) is arranged outside the water filter pipe well;
the drainage pipe joint and the air suction pipe joint are arranged on the sealed well cover, the drainage pipe comprises a pipe well inner drainage pipe (401) and a pipe well outer drainage pipe (402) and is connected into a whole by the drainage pipe joint, and the air suction pipe joint is used for connecting an air suction pipe and a vacuum pump.
2. The in-situ consolidation treatment device for the large-caliber vacuum pipe well of the municipal domestic sludge according to claim 1, characterized in that: most of the solid-wall well pipe (101) is exposed on a stable sludge surface (10) set by the sludge warehouse, and the well mouth of the solid-wall well pipe is 0.3-0.5 m higher than the sludge surface.
3. The in-situ consolidation treatment device for the large-caliber vacuum pipe well of the municipal domestic sludge according to claim 1, characterized in that: the well casing of the pipe well is firmly wound and bound by the bamboo sheets, the iron wires and the multilayer nylon nets to form a filter screen layer, and the whole hole of the pipe well has integrity.
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| Application Number | Priority Date | Filing Date | Title |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114277772A (en) * | 2022-01-18 | 2022-04-05 | 内蒙古嘉盈建设工程有限公司 | In-situ consolidation treatment method and device for large-diameter vacuum pipe well of municipal domestic sludge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114277772A (en) * | 2022-01-18 | 2022-04-05 | 内蒙古嘉盈建设工程有限公司 | In-situ consolidation treatment method and device for large-diameter vacuum pipe well of municipal domestic sludge |
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