CN110294584B - Device and method for consolidating sludge in different positions by utilizing dead weight - Google Patents
Device and method for consolidating sludge in different positions by utilizing dead weight Download PDFInfo
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- CN110294584B CN110294584B CN201910665256.7A CN201910665256A CN110294584B CN 110294584 B CN110294584 B CN 110294584B CN 201910665256 A CN201910665256 A CN 201910665256A CN 110294584 B CN110294584 B CN 110294584B
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- 239000010802 sludge Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000010410 layer Substances 0.000 claims abstract description 54
- 239000004744 fabric Substances 0.000 claims abstract description 10
- 239000011229 interlayer Substances 0.000 claims abstract description 8
- 238000007596 consolidation process Methods 0.000 claims description 14
- 239000002689 soil Substances 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims 1
- 238000007711 solidification Methods 0.000 abstract description 4
- 230000008023 solidification Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 6
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 210000000476 body water Anatomy 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Sludge (AREA)
Abstract
A device and a method for consolidating sludge by utilizing dead weight in different positions comprise the following steps: the double-layer barrel, the barrel water outlet, the bracket, the valve, the water collecting well and the self-control submersible pump, wherein the barrel water outlet is connected with the double-layer barrel, the bracket is connected with two sides and the lower end of the double-layer barrel, the valve is connected with the bottom of the barrel, the water collecting well is arranged at the bottom of the double-layer barrel, and the self-control submersible pump is arranged in the water collecting well. Wherein, double-deck barrel includes: the upper cylinder, the lower cylinder, the outer wall of the double-layer cylinder, the inner wall of the double-layer cylinder and the gap. According to the invention, the double-layer cylinder structure is designed to be adopted to solidify the sludge, and the water in the sludge is rapidly discharged into the interlayer of the inner wall and the outer wall of the cylinder through the filter cloth and the inner wall holes by utilizing the dead weight and the vacuum pressure of the sludge, so that the solidification speed of the sludge is accelerated, the flow work is facilitated, and the working efficiency is improved.
Description
Technical Field
The invention relates to the technical field of environmental protection, water conservancy and channel engineering, in particular to a device and a method for consolidation and reinforcement of sludge by utilizing dead weight in an ectopic manner.
Background
The sludge has the characteristics of high water content, large pore ratio, strong compressibility, low shear strength, poor water permeability and the like, is commonly used in projects such as environmental protection dredging of sludge on land, rivers and lakes, and the like, and if the sludge is not treated, the sludge is difficult to realize consolidation settlement under natural conditions, and occupies a large amount of land resources, so that the project progress and investment are greatly influenced, and therefore, how to realize economic and feasible rapid consolidation of the sludge has been a technical problem.
For sea and land construction, if land materials are sludge, a sludge taking area is generally far, one or more sludge storage pits are excavated around the construction to store the conveyed sludge, the sludge is blown into the construction area in a hydraulic filling mode, and finally, the sludge is processed by a drainage consolidation method such as vacuum preloading, preloading and the like to form a land area meeting the requirements; if the periphery of the engineering area cannot excavate a mud pit due to natural conditions or policy limitation, the carried mud is stored in no place, so that the subsequent engineering cannot be smoothly implemented, and the engineering difficulty and the construction cost are greatly increased.
For the environment-friendly dredging engineering of river and lake sediment, the traditional mechanical dehydration drying method is divided into centrifugal dehydration drying and filter pressing dehydration drying, and has the main defects of higher manufacturing cost of dehydration equipment, high energy consumption of equipment operation and higher engineering cost.
To solve the above problems, we have made a series of improvements.
Disclosure of Invention
The invention aims to provide a device and a method for consolidating sludge by dead weight in different positions, which overcome the defects and the shortcomings in the prior art.
A device for consolidating sludge by utilizing dead weight in different positions, which comprises: the double-layer cylinder body, a cylinder body water outlet, a bracket, a valve, a water collecting well and an automatic control submersible pump, wherein the cylinder body water outlet is connected with the double-layer cylinder body, the bracket is connected with two sides and the lower end of the double-layer cylinder body through flanges, the valve is connected with the bottom of the cylinder body, the water collecting well is arranged at the bottom end of the double-layer cylinder body, and the automatic control submersible pump is arranged in the water collecting well;
wherein, double-deck barrel includes: the double-layer cylinder comprises an upper cylinder body, a lower cylinder body, a double-layer cylinder body outer wall, a double-layer cylinder body inner wall and a gap, wherein the upper cylinder body is connected with the upper end of the lower cylinder body, the double-layer cylinder body outer wall is arranged on the outer sides of the upper cylinder body and the lower cylinder body, the double-layer cylinder body inner wall is arranged on the inner sides of the upper cylinder body and the lower cylinder body, and the gap is arranged between the double-layer cylinder body outer wall and the double-layer cylinder body inner wall.
Further, the barrel water outlet includes: the first water outlet is connected with the upper cylinder body, and the second water outlet is connected with the lower cylinder body.
Further, the inner wall of the double-layer cylinder body is provided with holes, filter cloth is arranged in the holes, and the holes are not arranged in the range 50cm above the first water outlet.
Further, the lower cylinder is provided with a vacuumizing hole, and the vacuumizing hole is connected with a vacuum pump.
A method for consolidating sludge by utilizing dead weight in different positions comprises the following steps:
step 1: conveying sludge, conveying the sludge of the slurry pond into the barrel from the upper part of the barrel, closing a lower valve, draining the upper barrel, solidifying the sludge in the upper barrel by draining under the dead weight pressure, flowing the drained water into an interlayer of the inner wall and the outer wall of the barrel through filter cloth and inner wall holes, and draining through a first water outlet below the upper barrel;
step 2: the lower cylinder body is subjected to vacuum drainage, a vacuumizing hole is arranged on the outer wall of the middle of the lower cylinder body and is connected with a vacuum pump, after vacuum pressure is formed between the inner wall and the outer wall of the lower cylinder body, soil body below the cylinder body is subjected to drainage consolidation under the dead weight and the vacuum pressure, water discharged by sludge consolidation is collected through a water collecting well at the bottom end of the double-layer cylinder body and is discharged out of the cylinder body by utilizing an automatic control submersible pump, and a second water outlet of the lower cylinder body is a water outlet of the automatic control submersible pump;
step 3: discharging soil, gradually discharging the solidified soil by controlling a valve at the lower part of the cylinder and adjusting the pressure of vacuum equipment after the water content of the sludge at the bottom of the lower part of the cylinder reaches the requirement, and synchronously adding the sludge to be solidified at the upper part of the cylinder to carry out flow production.
The invention has the beneficial effects that:
compared with the prior art, the invention has simple structure, small occupied area, adopts a treatment mode of combining vacuum preloading and self-weight consolidation, has short sludge drainage distance, greatly increases the sludge consolidation treatment speed on the basis of ensuring the sludge consolidation treatment effect, can realize running water construction, has relatively low energy consumption, saves wage investment and construction period, and is particularly suitable for projects limited by sites.
Description of the drawings:
fig. 1 is a schematic structural view of the present invention.
Reference numerals:
the double-layered cylinder 100, the upper cylinder 110, the lower cylinder 120, the evacuation holes 121, and the double-layered cylinder outer wall 130.
A double-layer cylinder inner wall 140, holes 141 and a gap 150.
Barrel outlet 200, first outlet 210, second outlet 220, bracket 300, and flange 310.
Valve 400, water collection well 500, and self-controlled submersible pump 600.
Detailed Description
The invention will now be further described with reference to specific examples. It should be understood that the following examples are illustrative of the present invention and are not intended to limit the scope of the present invention.
Example 1
Fig. 1 is a schematic structural view of the present invention.
As shown in fig. 1, a device for consolidating sludge by self-weight consolidation in different positions comprises: the double-layer barrel 100, a barrel water outlet 200, a bracket 300, a valve 400, a water collecting well 500 and an automatic control submersible pump 600, wherein the barrel water outlet 200 is connected with the double-layer barrel 100, the bracket 300 is connected with the two sides and the lower end of the double-layer barrel 100 through flanges 310, the valve 400 is connected with the bottom of the double-layer barrel 100, the water collecting well 500 is arranged at the bottom end of the double-layer barrel 100, and the automatic control submersible pump 600 is arranged in the water collecting well 500;
wherein the double-layered cylinder 100 includes: the upper cylinder 110, the lower cylinder 120, the double-layer cylinder outer wall 130, the double-layer cylinder inner wall 140 and the gap 150, wherein the upper cylinder 110 is connected with the upper end of the lower cylinder 120, the double-layer cylinder outer wall 130 is arranged outside the upper cylinder 110 and the lower cylinder 120, the double-layer cylinder inner wall 140 is arranged inside the upper cylinder 110 and the lower cylinder 120, and the gap 150 is arranged between the double-layer cylinder outer wall 130 and the double-layer cylinder inner wall 140.
The cartridge outlet 200 includes: a first water outlet 210 and a second water outlet 220, the first water outlet 210 being connected to the upper cylinder 110, the second water outlet 220 being connected to the lower cylinder 120.
The inner wall 140 of the double-layer cylinder body is provided with holes 141, filter cloth is arranged in the holes 141, and the holes 141 are not arranged in the range of 50cm above the first water outlet 210.
The lower cylinder 120 is provided with a vacuum hole 121, and the vacuum hole 121 is connected with a vacuum pump.
A method for consolidating sludge by utilizing dead weight in different positions comprises the following steps:
step 1: conveying sludge, conveying the sludge of the slurry pond into the barrel from the upper part of the barrel, closing the lower valve 400, draining the upper barrel 110, solidifying the sludge in the upper barrel 110 by draining under the dead weight pressure, flowing the drained water into the interlayer of the inner wall and the outer wall of the barrel through the filter cloth and the inner wall holes, and draining through the first water outlet 210 below the upper barrel 110;
step 2: the lower cylinder 120 is subjected to vacuum drainage, a vacuumizing hole 121 is arranged on the middle outer wall of the lower cylinder 120 and is connected with a vacuum pump, after vacuum pressure is formed between the inner wall and the outer wall of the lower cylinder 120, soil body below the cylinder is subjected to drainage consolidation under the dead weight and the vacuum pressure, the discharged water flows into the interlayer of the inner wall and the outer wall of the cylinder through filter cloth and inner wall holes, is collected through a water collecting well 500 at the bottom end of the double-layer cylinder 100, is discharged out of the cylinder by utilizing an automatic control submersible pump 600, and a second water outlet 220 of the lower cylinder 120 is a water outlet of the automatic control submersible pump 600;
step 3: and (3) unloading the soil body, gradually unloading the solidified soil body by controlling a lower valve 400 of the cylinder and adjusting the pressure of vacuum equipment after the water content of the sludge at the bottom of the lower cylinder 120 reaches the requirement, and synchronously adding the sludge to be solidified at the upper part of the cylinder to carry out flow production.
The principle of the invention is as follows:
the invention reduces the radial drainage distance of the silt after the silt is ectopic, and utilizes the combination of dead weight pressure and vacuum pressure to drain and quickly solidify the silt, and the main principle is as follows:
in engineering, most of silt is in a saturated state, a two-phase system is mainly composed of solid soil particles and pore water, the solidification process of the silt is the process of removing pore water in soil body, reducing pore ratio and compacting the soil body under the action of force, and two main factors for realizing solidification are force and drainage paths. According to the invention, after the sludge is ectopic, the sludge forms a cylinder-like body, the boundary is permeable, and because the cylinder has a certain height, part of free water in the upper part of the sludge is discharged through the permeable boundary under the action of dead weight, the lower part of the sludge is acted by the pressure of the upper part of the sludge, and is additionally assisted by vacuum pressure, the sludge is added with a shorter radial drainage path under double pressure, and according to the principle of too sand foundation in soil mechanics, the drainage rate of soil body is inversely proportional to the square of the drainage path, namely, the drainage rate can be increased by four times when the drainage path is shortened by half, so that the speed and effect of solidifying the sludge are ensured.
In order to achieve the above purpose, the invention is realized by the following technical scheme: the invention mainly comprises three parts: a supporting system, a double-layer cylinder system, a vacuumizing system and a drainage system.
The support system comprises: the supporting system mainly comprises a steel support and a concrete foundation, a support 300 of four steel support structures is connected with a foundation and a cylinder structure, and a plurality of transverse struts are additionally arranged between the support 300 and the cylinder structure in order to ensure the stability of the support 300; the concrete foundation is linked by flanges 310 and brackets 300 to form together the support system of the present invention.
Double-layer barrel system: in the embodiment, the main body of the double-layer cylinder 100 is formed by a double-layer steel cylinder structure, the cylinder body is 5m in height, the diameter of the inner wall is 2m, a 10cm gap 150 is reserved between the outer wall 130 of the double-layer cylinder and the inner wall 140 of the double-layer cylinder, and the space formed by the inner wall and the outer wall of the cylinder is divided into two parts which are 2m at the upper part and 3m at the lower part and are not communicated with each other; the upper part of the cylinder body is opened, the bottom end is provided with a valve with the diameter of 1m, the sludge enters through the upper part of the cylinder body, and the sludge is discharged through a valve opening at the lower part after consolidation is finished.
Vacuumizing and draining system: the bottom of the outer wall of the upper part of the cylinder is uniformly provided with cylinder water outlets 200 along the circumferential direction of the outer wall of the cylinder, and the cylinder water outlets are mainly used as water outlets for discharging water when the upper sludge is solidified by self weight; the water collecting well 500 is arranged at the bottom of the interlayer of the inner wall and the outer wall of the bottom of the cylinder body and is used for collecting water discharged by solidification of silt, and an external drain pipe of the self-control submersible pump 600 is arranged in the water collecting well 500 to discharge water in the water collecting well.
The inner cylinder wall is uniformly provided with holes 141 at a diameter of 3mm and a spacing of 10mm, and is attached with woven filter cloth for the purpose of water permeation without mud leakage, and holes 141 are not provided within a range of 50cm above the drain outlet at the upper part of the cylinder for the purpose of preventing vacuum leakage. The middle outer wall of the lower cylinder 120 is provided with a vacuumizing hole 121 with the aperture of 80mm, and is connected with a vacuum pump, the interlayer of the inner wall and the outer wall of the cylinder is vacuumized through the hole, and the vacuum pressure is transmitted to the sludge in the cylinder through the hole distribution of the inner cylinder wall, so that the application of the vacuum pressure is completed.
The present invention has been described in detail with reference to the embodiments, but the present invention is not limited thereto, and various modifications may be made without departing from the spirit of the present invention.
Claims (1)
1. A method for consolidating sludge by utilizing dead weight in different positions is characterized in that: the device for reinforcing the sludge by utilizing the self-weight consolidation is needed to be used for different positions of the sludge, and comprises: the double-layer barrel body (100), a barrel water outlet (200), a bracket (300), a valve (400), a water collecting well (500) and an automatic control submersible pump (600), wherein the barrel water outlet (200) is connected with the double-layer barrel body (100), the bracket (300) is connected with two sides and the lower end of the double-layer barrel body (100) through flanges (310), the valve (400) is connected with the bottom of the barrel body (100), the water collecting well (500) is arranged at the bottom of the double-layer barrel body (100), and the automatic control submersible pump (600) is arranged in the water collecting well (500);
wherein the double-layer cylinder (100) comprises: the novel double-layer cylinder comprises an upper cylinder body (110), a lower cylinder body (120), a double-layer cylinder body outer wall (130), a double-layer cylinder body inner wall (140) and a gap (150), wherein the upper cylinder body (110) is connected with the upper end of the lower cylinder body (120), the double-layer cylinder body outer wall (130) is arranged on the outer sides of the upper cylinder body (110) and the lower cylinder body (120), the double-layer cylinder body inner wall (140) is arranged on the inner sides of the upper cylinder body (110) and the lower cylinder body (120), and the gap (150) is arranged between the double-layer cylinder body outer wall (130) and the double-layer cylinder body inner wall (140);
the cartridge outlet (200) comprises: a first water outlet (210) and a second water outlet (220), wherein the first water outlet (210) is connected with the upper cylinder (110), and the second water outlet (220) is connected with the lower cylinder (120);
the inner wall (140) of the double-layer cylinder body is provided with holes (141), filter cloth is arranged in the holes (141), and the holes (141) are not arranged in the range of 50cm above the first water outlet (210);
the lower cylinder body (120) is provided with a vacuumizing hole (121), and the vacuumizing hole (121) is connected with a vacuum pump;
the method comprises the following steps:
step 1: conveying sludge, conveying the sludge of a slurry pond into a barrel from the upper part of the barrel, closing a lower valve (400), draining water from the upper barrel (110), solidifying the sludge in the upper barrel (110) by draining water under the dead weight pressure, enabling the drained water to flow into an interlayer of the inner wall and the outer wall of the barrel through filter cloth and inner wall holes, and draining through a first water outlet (210) below the upper barrel (110);
step 2: the lower cylinder body (120) is subjected to vacuum drainage, a vacuumizing hole (121) is formed in the middle outer wall of the lower cylinder body (120) and is connected with a vacuum pump, after vacuum pressure is formed between the inner wall and the outer wall of the lower cylinder body (120), soil body below the cylinder body is subjected to drainage consolidation under the dead weight and the vacuum pressure, the discharged water flows into the interlayer of the inner wall and the outer wall of the cylinder body through filter cloth and inner wall holes, is collected through a water collecting well (500) at the bottom end of the double-layer cylinder body (100), and is discharged out of the cylinder body by utilizing an automatic control submersible pump (600), and a second water outlet (220) of the lower cylinder body (120) is a water outlet of the automatic control submersible pump (600);
step 3: and (3) discharging soil, gradually discharging the solidified soil by controlling a lower valve (400) of the cylinder and adjusting the pressure of vacuum equipment after the water content of the sludge at the bottom of the lower cylinder (120) reaches the requirement, and synchronously adding the sludge to be solidified at the upper part of the cylinder to carry out flow production.
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| CN201910665256.7A CN110294584B (en) | 2019-07-23 | 2019-07-23 | Device and method for consolidating sludge in different positions by utilizing dead weight |
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| CN201910665256.7A CN110294584B (en) | 2019-07-23 | 2019-07-23 | Device and method for consolidating sludge in different positions by utilizing dead weight |
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