CN116589163B - Efficient and dense system for shield slurry wall breaking and stirring uniform distribution - Google Patents
Efficient and dense system for shield slurry wall breaking and stirring uniform distribution Download PDFInfo
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- CN116589163B CN116589163B CN202310758376.8A CN202310758376A CN116589163B CN 116589163 B CN116589163 B CN 116589163B CN 202310758376 A CN202310758376 A CN 202310758376A CN 116589163 B CN116589163 B CN 116589163B
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- 239000002002 slurry Substances 0.000 title claims abstract description 80
- 238000003756 stirring Methods 0.000 title claims abstract description 63
- 238000009827 uniform distribution Methods 0.000 title claims abstract description 30
- 230000008719 thickening Effects 0.000 claims abstract description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000002245 particle Substances 0.000 claims abstract description 52
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 238000010790 dilution Methods 0.000 claims abstract description 24
- 239000012895 dilution Substances 0.000 claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 23
- 238000004062 sedimentation Methods 0.000 claims abstract description 23
- 238000000926 separation method Methods 0.000 claims abstract description 23
- 239000008394 flocculating agent Substances 0.000 claims abstract description 14
- 239000007787 solid Substances 0.000 claims description 49
- 238000005520 cutting process Methods 0.000 claims description 18
- 239000003638 chemical reducing agent Substances 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract description 3
- 239000010419 fine particle Substances 0.000 abstract 1
- 239000002562 thickening agent Substances 0.000 description 34
- 230000000694 effects Effects 0.000 description 15
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 13
- 239000003814 drug Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides a high-efficiency thickening system for wall breaking, stirring and uniform distribution of shield slurry, which comprises a wall breaking stirring unit and a uniform distribution unit, wherein the wall breaking stirring unit comprises an inner cylinder body, a driving mechanism and an executing mechanism, and the driving mechanism can drive the executing mechanism to break and stir larger particle wall breaking in the shield slurry into fine particle slurry; the uniform distributing unit comprises an outer cylinder body and a dosing device, wherein the outer cylinder body is arranged at a certain height, a proper distance is kept between the outer cylinder body and the inner cylinder body, a discharging hole is formed in the side surface of the inner cylinder body, which is close to the bottom, and muddy water can enter a gap between the inner cylinder body and the outer cylinder body along the discharging hole to be fully and uniformly mixed with a flocculating agent, and enters a thickening tank to be stirred and quickly settled; the outer cylinder body is provided with a dilution opening, and clear water in the thickening tank can enter a gap between the inner cylinder body and the outer cylinder body along the dilution opening to assist in mixing and adjusting the concentration of muddy water; the integrated design of the invention effectively reduces the volume and the occupied area of equipment, quickens the sedimentation separation speed, obviously reduces the water content of sedimentation pug and realizes low-cost and high-efficiency production.
Description
Technical Field
The invention relates to the technical field of environment-friendly treatment of tunnel boring shield slurry, in particular to a high-efficiency thickening system for wall breaking and uniform distribution of shield slurry.
Background
In the environment-friendly treatment process of the shield mud, different types of concentrating devices are needed to concentrate the shield mud, the common practice is to input the screened shield mud into the concentrating device, and then adding a flocculating agent into the concentrating device to perform sedimentation, so that the effects of sedimentation of mud in the mud and overflow of clear water and solid-liquid separation are realized; however, in the practical application of various existing barrel-type and groove-type concentrating devices, due to the fact that the particle size difference of solid particles in mud water entering the concentrating device is large and the mixing of flocculant and mud water is uneven, the sedimentation speed of the solid is slow, the water content of the settled solid is high, the occupied area of treatment equipment is large, the treatment efficiency is low, the treatment capacity is small, and the post-treatment effect of the large water content of mud is not ideal.
Disclosure of Invention
The present invention aims to address at least one of the above-mentioned deficiencies of the prior art. For example, one of the purposes of the invention is to provide a high-efficiency and dense system for breaking wall and uniformly distributing shield slurry, so as to solve the technical problems of complex structure, large occupied space, uneven mixing of shield slurry and flocculant and difficult full separation of solid and liquid in the prior art.
In order to achieve the above purpose, the invention provides a shield slurry wall breaking, stirring and uniform distribution efficient thickening system, which comprises a wall breaking stirring unit and a uniform distribution unit, wherein the wall breaking stirring unit can comprise an inner cylinder body, a driving mechanism and an executing mechanism, the driving mechanism can be fixedly connected with the executing mechanism and is arranged at the upper end of the inner cylinder body, the executing mechanism can be arranged in the inner cylinder body, and the driving mechanism can be used for driving the executing mechanism to rotate in the inner cylinder body so as to break up solid particles in shield slurry and stir and mix the solid particles to form uniform slurry; the uniform distribution unit can comprise a thickening tank and an outer cylinder body sleeved outside the inner cylinder body, the lower end of the outer cylinder body can be communicated with the upper end of the thickening tank, a gap can be formed between the outer cylinder body and the inner cylinder body, a plurality of discharge holes can be formed in the side wall of the inner cylinder body, slurry subjected to wall breaking and stirring in the inner cylinder body can enter the gap between the outer cylinder body and the inner cylinder body through the discharge holes and can enter the thickening tank from the lower end of the outer cylinder body for sedimentation after being uniformly mixed with a flocculating agent; the side wall of the outer cylinder body can be provided with a plurality of dilution openings, and the liquid level in the thickening tank can enter a gap between the outer cylinder body and the inner cylinder body along the dilution openings after reaching the height of the dilution openings so as to assist the slurry to be mixed with the flocculating agent and adjust the concentration of the slurry.
Alternatively, the driving mechanism may include a motor, a speed reducer, and a driving shaft, the speed reducer may be installed between the motor and the driving shaft, the motor and the speed reducer may be installed at an upper end of the inner cylinder, the driving shaft may be fixedly connected to an output end of the speed reducer and extend into the inner cylinder, and the motor may be decelerated by the speed reducer and then drives the driving shaft to rotate.
Alternatively, the actuating mechanism may include a cutting assembly and a stirring blade, where the cutting assembly and the stirring blade may be both mounted on the driving shaft, and the cutting assembly and the stirring blade may both be driven by the driving shaft to rotate, where the cutting assembly may be used to break up solid particles in the shield mud, and the stirring blade may be used to mix the shield mud to form a uniform slurry.
Alternatively, the cutting assembly may include a cutter head holder and a plurality of cutter heads, the radially inner end of the cutter head holder may be fixedly connected to the drive shaft, and the plurality of cutter heads may be detachably connected to the radially outer end of the cutter head holder.
Alternatively, the lower end of the thickening tank may be formed as a cone to facilitate the recovery of solid particles in the slurry deposited at the bottom of the thickening tank.
Optionally, the uniform distribution unit may further include a central shaft and a mud-water separator, and the central shaft may be axially installed at a middle portion of the thickener tank; the mud-water separator can be fixedly connected to the central shaft and can slowly rotate around the central shaft to promote the separation of solid particles in the slurry from water.
Optionally, the mud-water separator may include a plurality of separation rod brackets and a plurality of separation rods, one end of each of the plurality of separation rod brackets may be fixedly connected to the central shaft, and the plurality of separation rod brackets may be axially spaced on the central shaft; the plurality of separating rods can be axially arranged and can be radially distributed on the plurality of separating rod brackets at intervals; the central shaft can drive a plurality of separating rod brackets and a plurality of separating rods to slowly rotate in the thickening tank.
Optionally, an overflow port may be formed on a side wall of the thickening tank, the height from the overflow port to the bottom of the thickening tank is not lower than the height from the dilution port to the bottom of the thickening tank, and clean water separated from the thickening tank can flow out along the overflow port and be reused.
Alternatively, the bottom of the thickener tank may be provided with a slurry outlet, through which solid particles deposited on the bottom of the thickener tank can be output and further processed.
Optionally, the upper ends of the inner cylinder and the outer cylinder are provided with an automatic dosing device, and the automatic dosing device can add a certain amount of flocculant into a gap between the outer cylinder and the inner cylinder so as to mix the flocculant with the slurry.
Compared with the prior art, the invention has the beneficial effects that at least one of the following contents is included:
1. according to the invention, the wall breaking stirring device and the dense sedimentation device are integrally designed, so that the equipment volume and the occupied area are effectively reduced, the installation and the operation of the treatment equipment can be completed under the conditions of small and compact occupied area and limited space of the treatment site, meanwhile, the equipment such as connecting pipelines and driving pumps among the devices are reduced, the conveying efficiency of shield mud is improved, and the effects of energy conservation and emission reduction are achieved.
2. The invention adopts the cloth mixing structure with the combination of the inner cylinder and the outer cylinder, can realize the process of mixing shield mud with flocculant while inputting the shield mud into the thickening tank, improves the full mixing effect of the medicament, reduces the medicament consumption, accelerates the sedimentation separation speed, can obviously reduce the water content of the sedimentation mud, and realizes low-cost and high-efficiency production; the water content of the solid particle part in the separated shield mud water can be reduced to below 40 percent.
Drawings
The foregoing and other objects and/or features of the invention will become more apparent from the following description taken in conjunction with the accompanying drawings in which:
fig. 1 shows a schematic diagram of the overall structure of a shield slurry wall breaking, stirring and uniform distribution efficient thickening system according to an exemplary embodiment of the present invention.
Fig. 2 shows a schematic diagram of a wall breaking stirring unit and partial structures of an inner cylinder and an outer cylinder in a shield slurry wall breaking stirring uniform distribution efficient thickening system according to an exemplary embodiment of the present invention.
Reference numerals illustrate:
1. The wall breaking stirring unit comprises a wall breaking stirring unit body 11, an inner cylinder body 111, a feeding port 112, a discharging port 12, a driving mechanism 121, a motor 122, a speed reducer 123, a driving shaft 13, an executing mechanism 131, a cutting assembly 1311, a tool bit support, 1312, a tool bit 132, stirring paddles 2, a uniform distribution unit 21, an outer cylinder body 211, a dilution port 22, a thickening tank 221, an overflow port 222, a slurry outlet 23, a central shaft 24, a mud-water separator 241, a separating rod support 242 and a separating rod.
Detailed Description
Hereinafter, the shield slurry wall breaking and stirring uniform distribution efficient thickening system of the present invention will be described in detail with reference to exemplary embodiments.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In the related art, the wall breaking stirring device and the dense settling device for treating the shield slurry are two split devices, and the shield slurry is conveyed between the two split devices and is connected and driven by an additional pipeline and a pump, so that the redundant equipment installation space is occupied, and the shield slurry is difficult to effectively treat under the conditions of compact equipment installation space and limited space; in addition, the mixing and stirring of the flocculating agent are carried out after the shield mud is input into the thickener, so that the mixing efficiency is greatly reduced, and the shield mud and the flocculating agent are difficult to fully and uniformly mix, thereby the technical defect that the solid and the liquid cannot be fully separated in the sedimentation process of the shield mud is also caused.
Based on the above, the invention provides a high-efficiency thickening system for wall breaking, stirring and uniform distribution of shield slurry, which is characterized by comprising a wall breaking stirring unit and a uniform distribution unit, wherein the wall breaking stirring unit comprises an inner cylinder, a driving mechanism and an executing mechanism, the driving mechanism is fixedly connected with the executing mechanism and is arranged at the upper end of the inner cylinder, the executing mechanism is arranged in the inner cylinder, and the driving mechanism is used for driving the executing mechanism to rotate in the inner cylinder so as to break up and stir solid particles in the shield slurry to form uniform slurry; the uniform distribution unit comprises a thickening tank and an outer cylinder body sleeved outside the inner cylinder body, the lower end of the outer cylinder body is communicated with the upper end of the thickening tank, a gap is formed between the outer cylinder body and the inner cylinder body, a plurality of discharge holes are formed in the side wall of the inner cylinder body, slurry subjected to wall breaking stirring in the inner cylinder body can enter the gap between the outer cylinder body and the inner cylinder body through the discharge holes, and the slurry is uniformly mixed with a flocculating agent and then enters the thickening tank from the lower end of the outer cylinder body for sedimentation; a plurality of dilution openings are formed in the side wall of the outer cylinder, and the liquid level in the thickening tank can enter a gap between the outer cylinder and the inner cylinder along the dilution openings after reaching the height of the dilution openings so as to assist the slurry to be mixed with the flocculating agent and adjust the concentration of the slurry.
According to the invention, the wall breaking stirring device and the dense sedimentation device are integrally designed, so that the volume and the occupied area of equipment are effectively reduced, the installation and the operation of the treatment equipment can be completed under the conditions of small and compact occupied area and limited space of a treatment site, meanwhile, the equipment such as connecting pipelines and driving pumps among the devices are reduced, the conveying efficiency of shield mud is improved, and the effects of energy conservation and emission reduction are achieved; the invention adopts the cloth mixing structure with the combination of the inner cylinder and the outer cylinder, can realize the process of mixing shield mud with flocculant while inputting the shield mud into the thickening tank, improves the full mixing effect of the medicament, reduces the medicament consumption, accelerates the sedimentation separation speed, can obviously reduce the water content of the sedimentation mud, and realizes low-cost and high-efficiency production; the water content of the solid particle part in the separated shield mud water can be reduced to below 40 percent.
Example embodiment 1
The embodiment provides a shield slurry wall-breaking stirring uniform distribution efficient thickening system.
Fig. 1 shows a schematic diagram of the overall structure of a shield slurry wall breaking, stirring and uniform distribution efficient thickening system according to an exemplary embodiment of the present invention; fig. 2 shows a schematic diagram of a wall breaking stirring unit and partial structures of an inner cylinder and an outer cylinder in a shield slurry wall breaking stirring uniform distribution efficient thickening system according to an exemplary embodiment of the present invention.
As shown in fig. 1 to 2, the efficient and dense system for uniformly breaking wall and distributing shield slurry according to the present exemplary embodiment may include a wall breaking stirring unit 1 and a uniform distributing unit 2, where the wall breaking stirring unit 1 is disposed at an upper end of the uniform distributing unit 2, the wall breaking stirring unit 1 may include an inner cylinder 11, a driving mechanism 12 and an executing mechanism 13, the driving mechanism 12 is fixedly connected with the executing mechanism 13, and the driving mechanism 12 is disposed at an upper end of the inner cylinder 11, the executing mechanism 13 is disposed in the inner cylinder 11, the driving mechanism 12 may drive the executing mechanism 13 to rotate in the inner cylinder 11, a feed inlet 111 may be opened at an upper end of the inner cylinder 11, and shield slurry may enter the inner cylinder 11 along the feed inlet 111 and break solid particles in the shield slurry under the rotation of the executing mechanism 13, so that the particle sizes of the solid particles having inconsistent particle sizes in the shield slurry may become substantially the same, and the particle sizes of the solid particles may also be reduced, thereby reducing gaps between the solid particles, further increasing the density of the settled solid particles, and reducing the water content; the solid particles are broken by the actuating mechanism 13, and meanwhile, the function of stirring and mixing shield slurry can be realized, so that uniform fine slurry is formed.
In this embodiment, the uniform distribution unit 2 may include an outer cylinder 21 and a thickening tank 22 sleeved outside the inner cylinder 11, where the lower end of the outer cylinder 21 may be communicated with the thickening tank 22, a gap with a certain width may be formed between the outer cylinder 21 and the inner cylinder 11, a plurality of discharge holes 112 may be formed on the side wall of the inner cylinder 11, after the solid particles in the shield mud in the inner cylinder 11 are broken and uniformly mixed by the broken wall stirring unit 1 in the inner cylinder 11, the shield mud may enter the gap between the outer cylinder 21 and the inner cylinder 11 along the plurality of discharge holes 112 on the side wall of the inner cylinder 11, and at the same time, a quantitative flocculant may be added into the gap between the outer cylinder 21 and the inner cylinder 11 by an automatic dosing device (not shown in the drawing) disposed at the upper end of the inner cylinder and the outer cylinder, so that in the process of inputting the shield mud into the thickening tank 22 along the gap between the outer cylinder 21 and the inner cylinder 11, the shield mud and the flocculant may be fully mixed, and the shield mud after the mixing may be input into the sedimentation tank 22 from the lower end of the outer cylinder 21 to separate. However, the present invention is not limited thereto, and the number of the discharge ports 112 formed on the side wall of the inner cylinder 11 may be any number, which is not particularly limited thereto.
Optionally, a plurality of dilution openings 211 are formed on the side wall of the outer cylinder 21, along with the gradual increase of the amount of the shield slurry entering the thickener 22, the liquid level in the thickener 22 is also continuously increased, at this time, the sedimentation process in the thickener 22 is also simultaneously performed, that is, the solid particles in the shield slurry are mainly deposited at the lower part of the thickener 22, and the upper part of the thickener 22 is mainly separated clean water, when the liquid level in the thickener 22 is increased to the height of the plurality of dilution openings 211 on the outer cylinder 21, the clean water at the upper part of the thickener 22 can be returned to the gap between the outer cylinder 21 and the inner cylinder 11 along the plurality of dilution openings 211, so that the mixture is mixed with the shield slurry in the gap between the outer cylinder 21 and the inner cylinder 11 and the added flocculant, on the one hand, the mixture can be diluted to adjust the concentration of the shield slurry to achieve the optimal sedimentation effect, on the other hand, the mixing between the shield slurry and the flocculant can be promoted, the mixing efficiency is improved, and the mixing effect is further enhanced, and the shield slurry in the separation effect of the thickener 22 is further enhanced. However, the present invention is not limited thereto, and the number of the dilution holes 211 formed in the outer cylinder 21 may be any number, and the present invention is not limited thereto.
Alternatively, the distance from the discharge port 112 on the inner cylinder 11 to the lower end of the outer cylinder 21 may be set to h, the vertical distance between the outer wall of the inner cylinder 11 and the inner wall of the outer cylinder 21 may be set to a, the value of h: a may be determined after calculation according to the treatment capacity, concentration, etc., and the shield mud water may achieve the optimal mixing effect with the flocculant in the process of inputting the shield mud water into the thickener 22 after the value of h: a is determined.
In this embodiment, the driving mechanism 12 may include a motor 121, a speed reducer 122 and a driving shaft 123, wherein the motor 121 and the speed reducer 122 are installed at the upper end of the inner cylinder 11, the speed reducer 122 is disposed between the motor 121 and the driving shaft 123, the driving shaft 123 is fixedly connected to the output end of the speed reducer 122 and simultaneously extends into the inner cylinder 11, and the motor 121 may drive the driving shaft 123 to rotate after being decelerated by the speed reducer 122.
In this embodiment, the executing mechanism 13 may include a cutting assembly 131 and a stirring blade 132, where the cutting assembly 131 and the stirring blade 132 may be sequentially installed on the driving shaft 123 from top to bottom and are axially spaced from each other, the cutting assembly 131 and the stirring blade 132 may both rotate under the driving of the driving shaft 123, the cutting assembly 131 may break up solid particles in the shield mud, reduce the particle size of the solid particles and make the particle size substantially the same, and the stirring blade 132 may stir and mix the broken shield mud uniformly, so as to form uniform fine slurry; in addition, the rotation speed of the motor 121 is adjustable, the rotation speed of the cutting assembly 131 and the stirring blade 132 can be controlled by adjusting the rotation speed of the motor 121, and shield mud water with different concentrations and components can be selectively adjusted.
Alternatively, the cutting assembly 131 may include a cutter head support 1311 and a plurality of cutter heads 1312, the cutter head support 1311 may be disposed along a radial direction of the inner cylinder 11, that is, perpendicular to the driving shaft 123, and a radial inner end thereof may be fixedly connected to the driving shaft 123, the plurality of cutter heads 1312 may be mounted on the cutter head support 1311 through a bolt connection, and the plurality of cutter heads 1312 may be all spaced apart from the driving shaft 123 in a radial direction, for example, a portion of the cutter heads 1312 may be mounted in a middle portion of the cutter head support 1311, another portion of the cutter heads 1312 may be mounted at a radial outer end of the cutter head support 1311, and the plurality of cutter heads 1312 may all cut and break solid particles in shield mud as the driving shaft 123 and the cutter head support 1311 rotate; however, the present invention is not limited thereto, the number of the tool bits 1312 mounted on the tool bit support 1311 may be any number, and other detachable connection manners other than bolting, such as screw connection, slot connection, etc., may be used between the tool bits 1312 and the tool bit support 1311, so that the tool bits 1312 are easily damaged, and only the detachable connection between the tool bits 1312 and the tool bit support 1311 is required to be ensured, so that the tool bits 1312 can be easily replaced.
In this embodiment, the uniform distribution unit 2 may further include a central shaft 23 and a mud-water separator 24, where the central shaft 23 may be axially installed at a central position of the thickener 22, an upper end of the central shaft 23 may be rotatably connected to a lower end of the inner cylinder 11, a lower end of the central shaft 23 may be rotatably connected to a bottom of the thickener, and the central shaft 23 may rotate along an axis thereof; the mud-water separator 24 can be fixedly connected to the central shaft 23, the mud-water separator 24 can slowly rotate in the thickening tank 22 under the drive of the rotation of the central shaft 23, and the slow rotation process can be used for promoting the further separation of solid particles and water in the sedimentation process of shield mud in the thickening tank 22, so that the mud-water separation is more sufficient, and the water content in the settled solid particles is further reduced.
Alternatively, the mud-water separator 24 may include a plurality of separation rod holders 241 and a plurality of separation rods 242, one end of each of the plurality of separation rod holders 241 may be fixedly coupled to the central shaft 23, and each of the plurality of separation rod holders 241 may be disposed on the central shaft 23 at intervals in an axial direction; the plurality of separating rods 242 can be arranged along the axial direction, and the plurality of separating rods 242 can be connected with the plurality of separating rod brackets 241 at intervals along the radial direction, that is, the plurality of separating rod brackets 241 and the plurality of separating rods 242 can be arranged in a crisscross manner so as to form a rake-shaped structure, and the structure can slowly rotate in the thickening tank 22 under the drive of the rotation of the central shaft 23 so as to achieve the effect of further promoting the mud-water separation of shield mud water; however, the present invention is not limited thereto, and the structure of the mud-water separator 24 may be other than the above-described structure, as long as the sufficient separation of the shield mud can be promoted, and the present invention is not limited thereto.
In this embodiment, the bottom of the thickener 22 is provided with a slurry outlet 222, when a certain amount of solid particles deposited in the thickener 22 are required to be output for the next filter pressing treatment, the slurry outlet 222 can be opened, and the solid particles deposited at the bottom of the thickener 22 can be discharged from the thickener 22 along the slurry outlet 222, so that the solid particles can enter the filter press for the filter pressing treatment; preferably, the bottom of the thickener 22 may be formed into a cone structure, and after the shield mud is settled in the thickener 22 to realize solid-liquid separation, solid particles may be deposited on the bottom of the thickener 22, and if the bottom structure of the thickener is designed into a cone structure, the deposition of solid particles on the bottom of the thickener 22 is more facilitated; in addition, in the process of opening the slurry outlet 222 to discharge the solid particles, if the bottom of the thickener 22 has a conical structure, the solid particles will be automatically guided into the slurry outlet 222 by using the gravity of the solid particles, so that the output of the solid particles is more facilitated. However, the present invention is not limited thereto, and the bottom of the thickener 22 may have a circular arc shape, a slope shape, or other different shapes, as long as the solid particles deposited at the bottom are easily guided out, and the present invention is not limited thereto.
In this embodiment, the side wall of the thickener 22 may be provided with an overflow port 221, the height from the overflow port 221 to the bottom of the thickener 22 is not lower than the height from the dilution port 211 to the bottom of the thickener 22, preferably, the height from the overflow port 221 to the bottom of the thickener 22 is the same as the height from the dilution port 211 to the bottom of the thickener 22, that is, when the liquid level in the thickener 22 rises to the position where the overflow port 221 and the dilution port 211 are located, on one hand, the clean water separated from the upper part of the thickener 22 can flow back into the gap between the outer cylinder 21 and the inner cylinder 11 through the dilution port 211, and on the other hand, the clean water can also flow out from the thickener 22 through the overflow port 221 and be recycled.
The working process of the shield slurry wall-breaking stirring uniform distribution efficient thickening system according to the present exemplary embodiment is described in detail as follows:
The shield mud water after washing, screening and filtering is input into the inner cylinder 11 through a feed inlet 111 at the upper end of the inner cylinder 11, a motor 121 is turned on, a driving shaft 123, a cutting assembly 131 and a stirring blade 132 are driven to rotate together under the decelerating effect of a speed reducer 122, solid particles in the shield mud water in the inner cylinder 11 are smashed and stirred uniformly to form fine slurry, the fine slurry enters a gap between the outer cylinder 21 and the inner cylinder 11 along a discharge hole 112 formed in the side wall of the lower end of the inner cylinder 11, at the moment, a sufficient amount of flocculating agent is added into the gap between the outer cylinder 21 and the inner cylinder 11, and the fine slurry is fully and uniformly mixed with the flocculating agent in the process of flowing downwards along the gap between the outer cylinder 21 and the inner cylinder 11, and enters a thickening tank 22 from the lower end of the outer cylinder 21; the mud-water separator 24 is started to slowly rotate, the shield mud in the thickening tank 22 is subjected to sedimentation separation under the combined action of the flocculant and the mud-water separator 24, solid particles move downwards to deposit at the bottom of the thickening tank 22, clear water separated from the solid particles is positioned above to form a water layer, when the water level in the thickening tank 22 rises to the height of the overflow port 221 and the dilution port 211, on one hand, the clear water separated from the upper part of the thickening tank 22 can flow back into a gap between the outer cylinder 21 and the inner cylinder 11 through the dilution port 211 and is mixed with the shield mud in the gap between the outer cylinder 21 and the inner cylinder 11 and the added flocculant again, so that the concentration of the shield mud can be adjusted, the optimal sedimentation effect is realized, the mixing between the shield mud and the flocculant can be promoted, and the mixing efficiency is improved; on the other hand, clean water can also flow out of the thickening tank 22 through the overflow port 221 and be recycled; when the solid particles deposited at the bottom of the thickening tank 22 reach a sufficient amount to be discharged, a slurry outlet 222 at the lower end of the thickening tank 22 is opened, and the solid particles deposited at the bottom of the thickening tank 22 are discharged from the thickening tank 22 and input into a filter press for further filter pressing treatment.
In summary, the wall breaking stirring device and the dense settling device are integrally designed, so that the volume and the occupied area of equipment are effectively reduced, the installation and the operation of the treatment equipment can be completed under the conditions of small and compact occupied area and limited space of a treatment site, meanwhile, the equipment such as connecting pipelines and driving pumps among the devices are reduced, the conveying efficiency of shield mud is improved, and the effects of energy conservation and emission reduction are achieved; the invention adopts the cloth mixing structure with the combination of the inner cylinder and the outer cylinder, can realize the process of mixing shield mud with flocculant while inputting the shield mud into the thickening tank, improves the full mixing effect of the medicament, reduces the medicament consumption, accelerates the sedimentation separation speed, can obviously reduce the water content of the sedimentation mud, and realizes low-cost and high-efficiency production; the water content of the solid particle part in the separated shield mud water can be reduced to below 40 percent.
Although the present invention has been described above with reference to the exemplary embodiments and the accompanying drawings, it should be apparent to those of ordinary skill in the art that various modifications can be made to the above-described embodiments without departing from the spirit and scope of the claims.
Claims (7)
1. The efficient thickening system for wall breaking, stirring and uniform distribution of shield slurry is characterized by comprising a wall breaking stirring unit and a uniform distribution unit,
The wall breaking stirring unit comprises an inner cylinder, a driving mechanism and an actuating mechanism, wherein the driving mechanism is fixedly connected with the actuating mechanism and is arranged at the upper end of the inner cylinder, the actuating mechanism is arranged in the inner cylinder, and the driving mechanism is used for driving the actuating mechanism to rotate in the inner cylinder so as to break up solid particles in shield mud water, stir and mix the solid particles to form uniform slurry;
The uniform distribution unit comprises a thickening tank and an outer cylinder body sleeved outside the inner cylinder body, the lower end of the outer cylinder body is communicated with the upper end of the thickening tank, a gap is formed between the outer cylinder body and the inner cylinder body, a plurality of discharge holes are formed in the side wall of the inner cylinder body, slurry subjected to wall breaking stirring in the inner cylinder body can enter the gap between the outer cylinder body and the inner cylinder body through the discharge holes, and the slurry is uniformly mixed with a flocculating agent and then enters the thickening tank from the lower end of the outer cylinder body for sedimentation; the side wall of the outer cylinder body is provided with a plurality of dilution openings, and the liquid level in the thickening tank can enter a gap between the outer cylinder body and the inner cylinder body along the dilution openings after reaching the height of the dilution openings so as to assist the slurry to be mixed with the flocculating agent and adjust the concentration of the slurry;
The upper ends of the inner cylinder body and the outer cylinder body are provided with automatic dosing devices, and the automatic dosing devices can add quantitative flocculating agents into gaps between the outer cylinder body and the inner cylinder body so as to mix the flocculating agents with slurry;
The uniform distribution unit further comprises a central shaft and a mud-water separator, and the central shaft is axially arranged in the middle of the thickening tank; the mud-water separator is fixedly connected to the central shaft and can slowly rotate around the central shaft to promote the separation of solid particles in the slurry from water;
The mud-water separator comprises a plurality of separating rod brackets and a plurality of separating rods, one ends of the plurality of separating rod brackets are fixedly connected with the central shaft, and the plurality of separating rod brackets are axially distributed on the central shaft at intervals; the plurality of separating rods are axially arranged and are distributed on the plurality of separating rod brackets at intervals along the radial direction; the central shaft can drive a plurality of separating rod brackets and a plurality of separating rods to slowly rotate in the thickening tank.
2. The efficient and dense system for wall breaking, stirring and uniform distribution of shield slurry according to claim 1, wherein the driving mechanism comprises a motor, a speed reducer and a driving shaft, the speed reducer is arranged between the motor and the driving shaft, the motor and the speed reducer are arranged at the upper end of the inner cylinder, the driving shaft is fixedly connected with the output end of the speed reducer and extends into the inner cylinder, and the motor can drive the driving shaft to rotate after being decelerated by the speed reducer.
3. The efficient and dense system for wall breaking, stirring and uniform distribution of shield slurry according to claim 2, wherein the executing mechanism comprises a cutting assembly and stirring paddles, the cutting assembly and the stirring paddles are mounted on the driving shaft, the cutting assembly and the stirring paddles can rotate under the driving of the driving shaft, the cutting assembly is used for breaking up solid particles in the shield slurry, and the stirring paddles are used for stirring and mixing the shield slurry to form uniform slurry.
4. The efficient and dense system for wall breaking and uniform distribution of shield slurry according to claim 3, wherein the cutting assembly comprises a cutter head support and a plurality of cutter heads, the radially inner ends of the cutter head support are fixedly connected with the driving shaft, and the plurality of cutter heads are detachably connected to the radially outer ends of the cutter head support.
5. The efficient shield slurry wall breaking and uniformly stirring distribution thickening system according to claim 1, wherein the lower end of the thickening tank is formed into a cone, so that solid particles in slurry are deposited at the bottom of the thickening tank and are recycled.
6. The efficient shield slurry wall-breaking and uniformly-stirring distribution thickening system according to claim 1, wherein the side wall of the thickening tank is provided with an overflow port, the height from the overflow port to the bottom of the thickening tank is not lower than the height from the dilution port to the bottom of the thickening tank, and clean water separated from the thickening tank can flow out along the overflow port and be reused.
7. The efficient thickening system for shield slurry wall breaking and uniform distribution according to claim 1, wherein a slurry outlet is formed in the bottom of the thickening tank, and solid particles deposited on the bottom of the thickening tank can be output through the slurry outlet and further processed.
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