Slurry shield slurry circulating treatment system
Through the mud-water shield mud circulation treatment system composed of a cyclone and a screening machine, the problem of high equipment complexity in the existing technology is solved, efficient separation and simplified screening of three types of granular muds are achieved, and the complexity of the system is reduced.
Patent Information
- Application Number
- CN202422173107.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-04
AI Technical Summary
The existing mud and water treatment system has high equipment complexity when separating three muds of different particle sizes and requires multiple screening processes.
A secondary screening device consisting of a first, second and third screening machine with different sizes of screen holes is used to initially divide three slurries of different particle sizes through a cyclone, and then further screening is carried out in the respective screening machine to form a circulation treatment system.
The equipment structure is simplified, the number of screening processes is reduced, the efficient separation of three types of granular muds is achieved, and the terminal mud treatment is reduced.
Smart Images
Figure CN223074060U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of muddy water separation treatment, in particular to a muddy water shield mud circulation treatment system. Background Art
[0002] Slurry balance shield excavation is a commonly used tunnel excavation technology. During the operation of the shield machine, muddy water is required to resist the water pressure and soil pressure on the excavation face to maintain the stability of the excavation face. To achieve this goal, the slurry containing sand and soil discharged during tunneling needs to be separated step by step. The separated mud is partially adjusted and then transported back to the excavation face, while the separated gravel and soil can be directly transported out. Among them, the muddy water treatment system is a device for treating the slurry containing sand and soil generated during tunneling, including a primary screening device for separating large solid stones and mud blocks, a secondary screening device for separating gravel, soil and water, a sedimentation tank and a slurry adjusting device.
[0003] In the secondary screening device of the muddy water treatment system on the market, when it is necessary to separate three kinds of slurries with different particle size concentrations, usually the screening process is used to divide the slurry into two kinds of slurries with different particle size concentrations, and then one of the slurries is selected for a primary slurry screening process, that is, at least two screening processes are required. For example, a three-stage concentration circulation treatment system for shield muddy water (publication number CN115716701A), its secondary screening device includes a number of primary cyclones, a number of secondary cyclones and a number of vibrating screening and dewatering units, and at least two screening processes are required to achieve the effect of three products. That is, as the number of screening processes increases, the equipment complexity increases accordingly.
[0004] Therefore, it has practical value to study a muddy water shield mud circulation treatment system that can separate three kinds of slurries with different particle sizes through a simple structure. Summary of the Utility Model
[0005] The utility model provides a muddy water shield mud circulation treatment system, which is used to solve the problem that the equipment for separating three kinds of slurries with different particle sizes in the existing system is very complex.
[0006] The utility model provides a muddy water shield mud circulation treatment system, including: a muddy water shield machine, a primary screening device, a secondary screening device, a sedimentation tank and a slurry adjusting device; the muddy water shield machine, the primary screening device, the secondary screening device, the sedimentation tank and the slurry adjusting device are sequentially connected through pipelines to form a circulation path, and a pump group is connected to the pipeline of the circulation path;
[0007] The secondary screening device includes a cyclone, and a first screening machine, a second screening machine and a third screening machine with different screen hole sizes;
[0008] The cyclone is provided with a feed inlet, a coarse material outlet, a sand settling outlet and an overflow outlet;
[0009] The feed inlet is communicated with the primary screening device;
[0010] The liquid inlet of the first screening machine is communicated with the coarse material outlet, and the liquid outlet of the first screening machine is communicated with the liquid inlet of the second screening machine;
[0011] The liquid inlet of the second screening machine is further communicated with the sand settling outlet, and the liquid outlet of the second screening machine is communicated with the liquid inlet of the third screening machine;
[0012] The liquid inlet of the third screening machine is further communicated with the overflow outlet, and the liquid outlet of the third screening machine is communicated with the sedimentation tank.
[0013] In one embodiment, the aperture of the sieve holes of the primary screening device is 3 - 3.9 mm; the aperture of the sieve holes of the first screening machine is 1.8 - 1.9 mm; the aperture of the sieve holes of the second screening machine is 0.3 - 0.4 mm; the aperture of the sieve holes of the third screening machine is 0.05 - 0.073 mm.
[0014] In one embodiment, the slurry mixing device includes a clean water tank, a soil material box and a mixer; the clean water tank is communicated with the supernatant outlet of the sedimentation tank, and the water outlet of the clean water tank is communicated with the water inlet of the mixer; the discharge outlet of the soil material box is communicated with the mixer; the water inlet of the mixer is further communicated with the discharge outlet of the sedimentation tank.
[0015] In one embodiment, the supernatant outlet of the sedimentation tank is higher than the clean water tank.
[0016] In one embodiment, the sedimentation tank and the clean water tank are communicated through an overflow pipe, and a sieve mesh is arranged in the overflow pipe.
[0017] In one embodiment, the soil material box includes a discharging device and a powder meter, and the discharging device is used to adjust the discharging amount according to the reading of the powder meter; a clean water automatic valve and a clean water flowmeter are connected in the connecting pipeline between the clean water tank and the mixer, and the clean water automatic valve is used to adjust the flow rate according to the reading of the clean water flowmeter; a sedimentation automatic valve and a sedimentation flowmeter are connected in the connecting pipeline between the sedimentation tank and the mixer, and the sedimentation automatic valve is used to adjust the flow rate according to the reading of the sedimentation flowmeter.
[0018] In one embodiment, a pressure relief device is arranged in the sedimentation tank.
[0019] In one embodiment, a compression device is further included; the compression device is communicated with the discharge outlet of the sedimentation tank, and the compression device is used to compress the slurry.
[0020] In one of the embodiments, the compression device includes a flocculant adding mechanism, a stirring tank, and a filter press; the flocculant adding machine is arranged in the stirring tank; the feed inlet of the stirring tank is communicated with the discharge outlet of the sedimentation tank, and the discharge outlet of the stirring tank is communicated with the filter press; the filter press is used for compressing the sludge.
[0021] As can be seen from the above technical solutions, the present utility model has the following advantages:
[0022] An embodiment of the present utility model provides a muddy water shield mud circulation treatment system. The secondary screening device therein includes a hydrocyclone, as well as a first screening machine, a second screening machine, and a third screening machine with different sieve hole sizes; the hydrocyclone has a feed inlet, a coarse material outlet, a sand settling outlet, and an overflow outlet; the feed inlet is communicated with the primary screening device; the liquid inlet of the first screening machine is communicated with the coarse material outlet, and the liquid outlet of the first screening machine is communicated with the liquid inlet of the second screening machine; the liquid inlet of the second screening machine is also communicated with the sand settling outlet, and the liquid outlet of the second screening machine is communicated with the liquid inlet of the third screening machine; the liquid inlet of the third screening machine is also communicated with the overflow outlet, and the liquid outlet of the third screening machine is communicated with the sedimentation tank. Therefore, during application, the hydrocyclone can divide the mud into three streams through the coarse material outlet, the sand settling outlet, and the overflow outlet. The mud diverted from the coarse material outlet is separated in the first screening machine to obtain the mud with the first particle size concentration; the mud diverted from the sand settling outlet is combined with the mud separated by the first screening machine and separated in the second screening machine to obtain the mud with the second particle size concentration; the mud diverted from the overflow outlet is combined with the mud separated by the second screening machine and separated in the third screening machine to obtain the mud with the third particle size concentration. In this embodiment, a hydrocyclone preliminarily divides the mud into three streams with different particle size concentrations, and then the three streams are respectively screened with screening machines to obtain three kinds of particle muds. That is, by using the above equipment, only one screening process is completed to obtain three kinds of particle muds. Compared with the systems with multiple screening processes in the prior art, the structure is simpler. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0024] Figure 1 It is a schematic structural diagram of a muddy water shield mud circulation treatment system provided by an embodiment of the present utility model.
[0025] Reference Numerals in the Drawings:
[0026] 1. Slurry shield machine; 2. Primary screening device; 3. First slurry pump; 4. Hydrocyclone; 5. First screening machine; 6. Second slurry pump; 7. Second screening machine; 8. Third slurry pump; 9. Third screening machine; 10. Fourth slurry pump; 11. Filter press; 12. Sixth slurry pump; 13. Mixing tank; 14. Fifth slurry pump; 15. Sedimentation tank; 16. Clean water tank; 17. Mixer; 18. Soil material box; 19. Seventh slurry pump. Detailed implementation mode
[0027] An embodiment of the utility model provides a slurry shield mud circulation treatment system, which is used to solve the problem that the equipment for separating three kinds of mud with different particle sizes in the existing system is very complex.
[0028] In order to make the utility model purpose, features and advantages of the utility model more obvious and understandable, the technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the utility model. Obviously, the embodiments described below are only a part of the embodiments of the utility model, rather than all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the utility model.
[0029] Please refer to Figure 1 , Figure 1 which is a schematic diagram of a slurry shield mud circulation treatment system provided by an embodiment of the utility model.
[0030] A slurry shield mud circulation treatment system provided by the utility model includes:
[0031] A slurry shield machine 1, a primary screening device 2, a secondary screening device, a sedimentation tank 15 and a slurry adjusting device; the slurry shield machine 1, the primary screening device 2, the secondary screening device, the sedimentation tank 15 and the slurry adjusting device are sequentially connected through pipelines to form a circulation path, and a pump group is connected to the pipeline of the circulation path. The pump group includes a plurality of slurry pumps, and the pump group pumps the mud between the devices;
[0032] Among them, the secondary screening device includes a hydrocyclone 4, and a first screening machine 5, a second screening machine 7 and a third screening machine 9 with different screen hole sizes;
[0033] The hydrocyclone 4 has a feed inlet, a coarse material outlet, a sand settling port and an overflow port;
[0034] The feed inlet is connected to the primary screening device 2;
[0035] The liquid inlet of the first screening machine 5 is connected to the coarse material outlet through a pipeline, and the liquid outlet of the first screening machine 5 is connected to the liquid inlet of the second screening machine 7 through a pipeline;
[0036] The liquid inlet of the second screening machine 7 is also connected to the sand settling port through a pipeline, and the liquid outlet of the second screening machine 7 is connected to the liquid inlet of the third screening machine 9 through a pipeline;
[0037] The liquid inlet of the third screening machine 9 is also connected to the overflow port through a pipeline, and the liquid outlet of the third screening machine 9 is connected to the sedimentation tank 15 through a pipeline.
[0038] The working principle of this device is as follows. The waste slurry generated by the slurry shield machine 1 flows into the primary screening device 2 for primary screening. Subsequently, the slurry flowing out of the primary screening device 2 flows into the feed port of the hydrocyclone 4. After the slurry passes through the hydrocyclone 4, it flows out from the coarse material outlet, the sand settling port, and the overflow port respectively. The slurry diverted from the coarse material outlet is separated in the first screening machine 5 to obtain the slurry with the first particle size; the slurry diverted from the sand settling port, together with the slurry separated by the first screening machine 5, is separated in the second screening machine 7 to obtain the slurry with the second particle size; the slurry diverted from the overflow port, together with the slurry separated by the second screening machine 7, is separated in the third screening machine 9 to obtain the slurry with the third particle size. Finally, three kinds of slurries with different particle sizes are obtained. The slurry separated by the third screening machine 9 flows into the sedimentation tank 15 for sedimentation, and then is adjusted in the slurry adjusting device. The adjusted slurry is re-transported to the slurry shield machine 1 for use.
[0039] The above secondary screening device and the formed circulation system structure are not complex. Through a hydrocyclone 4, three different particle size slurries are initially separated. Subsequently, the three slurries are each screened in cooperation with the screening machine to obtain three kinds of slurries with different particle sizes, that is, by using the above equipment, only one screening process is completed to obtain three kinds of particle slurries. Compared with the system of multiple screening processes in the prior art, the complexity of the entire slurry separation system is reduced and the structure is simpler; moreover, since the slurry is recycled, the treatment work of the end slurry can be effectively reduced.
[0040] As a possible example, in this embodiment, as Figure 1 shown, a feasible structure of the hydrocyclone 4 is further provided. The feed port of the hydrocyclone 4 is opened on the wall of the hydrocyclone 4, the coarse material outlet is also opened on the wall of the hydrocyclone 4, the overflow port is opened at the top of the hydrocyclone 4, and the sand settling port is opened at the bottom of the hydrocyclone 4. That is, the hydrocyclone 4 is a three-product hydrocyclone 4. The three-product hydrocyclone 4 is an efficient separation device. This hydrocyclone 4 can divide the fed material into three different products: the overflow port (the finest particles), the coarse material outlet (the particles with medium particle size), and the sand settling port (the coarsest particles).
[0041] As a possible example, in this embodiment, as Figure 1As shown in the figure, a realizable structure of each screening machine or screening device is further provided. The primary screening device 2, the first screening machine 5, the second screening machine 7, and the third screening machine 9 preferably adopt vibrating screens. The exciting force generated by the vibrating motor makes the screen surface perform three-dimensional motion, and the slurry is combined with screens of different pore sizes to achieve solid-liquid separation of slurries with different particle sizes. Of course, other screening machines commonly used in the art can be selected by those skilled in the art.
[0042] In a specific embodiment, as Figure 1 shown, for the above-mentioned primary screening device 2, the pore size of the screen holes of the primary screening device 2 is between 3 and 3.9 mm. The waste slurry generated by the slurry shield machine 1 enters the primary screening device 2 through a pipeline by the first slurry pump 3. The primary screening device 2 can separate solid particles with a particle size ≥ 4 mm, and the slurry separated by the primary screening device 2 flows into the hydrocyclone 4 for subsequent treatment.
[0043] In a specific embodiment, as Figure 1 shown, for the above-mentioned first screening machine 5, the pore size of the screen holes of the first screening machine 5 is between 1.8 and 1.9 mm. The slurry flowing out from the coarse material outlet of the hydrocyclone 4 flows into the first screening machine 5 through a pipeline. The first screening machine 5 can separate solid particles with a particle size ≥ 2 mm, that is, after the first screening machine 5 processes, slurry with particles larger than 2 mm and separated slurry can be obtained. The separated slurry flows into the second screening machine 7 for subsequent treatment.
[0044] In a specific embodiment, as Figure 1 shown, for the above-mentioned second screening machine 7, the pore size of the screen holes of the second screening machine 7 is between 0.3 and 0.4 mm. The slurry flowing out from the sand settling port of the hydrocyclone 4 flows into the second screening machine 7, and the slurry separated by the first screening machine 5 flows into the second screening machine 7 through a pipeline by the second slurry pump 6. The second screening machine 7 can separate solid particles with a particle size ≥ 0.5 mm, that is, after the second screening machine 7 processes, slurry with particles larger than 0.5 mm and separated slurry can be obtained. The separated slurry flows into the third screening machine 9 for subsequent treatment.
[0045] In a specific embodiment, as Figure 1 shown, for the above-mentioned third screening machine 9, the pore size of the screen holes of the third screening machine 9 is between 0.05 and 0.073 mm. The slurry flowing out from the overflow port of the hydrocyclone 4 flows into the third screening machine 9, and the slurry separated by the second screening machine 7 flows into the third screening machine 9 through a pipeline by the third slurry pump 8. The third screening machine 9 can separate solid particles with a particle size ≥ 0.074 mm, that is, after the third screening machine 9 processes, slurry with particles larger than 0.074 mm and separated slurry can be obtained. The separated slurry is transported to the sedimentation tank 15 through a pipeline by the fourth slurry pump 10 for subsequent treatment.
[0046] As a possible example, in this embodiment, a setting method for the sedimentation tank 15 is further provided. To improve the sedimentation effect of the sedimentation tank 15, a pressure relief device is provided in the sedimentation tank 15. The pressure relief device can reduce the kinetic energy of the water flow when it enters the sedimentation tank 15, avoid the violent disturbance of the water flow from resuspending the settled particles, make the water flow entering the sedimentation tank 15 more evenly distributed throughout the tank body, improve the sedimentation efficiency, and ensure the sedimentation effect.
[0047] As a possible example, in this embodiment, as Figure 1 shown, a setting method for the pulp mixing device is further provided. The pulp mixing device includes a clean water tank 16, an earth material box 18, and a mixer 17; the clean water tank 16 is connected to the supernatant outlet of the sedimentation tank 15 through a pipeline, and the water outlet of the clean water tank 16 is connected to the water inlet of the mixer 17 through a pipeline; the discharge port of the earth material box 18 is connected to the mixer 17 through a pipeline; the water inlet of the mixer 17 is also connected to the discharge port of the sedimentation tank 15 through a pipeline, that is, the sedimentation tank 15 and the clean water tank 16 each have a slurry discharge pipeline, and the pipelines converge at the end to form a main pipeline. A Venturi solid-liquid mixer 17 is installed in the middle of the main pipeline. The slurry of the sedimentation tank 15, the raw water of the clean water tank 16, and bentonite are used to prepare the slurry required for the slurry shield through the Venturi solid-liquid mixer 17, and are transported to the slurry shield machine 1 through the seventh slurry pump 19.
[0048] In a specific embodiment, as Figure 1 shown, to reduce the energy consumption of the system, the supernatant outlet of the sedimentation tank 15 is higher than the clean water tank 16, and the sedimentation tank 15 and the clean water tank 16 are connected through an overflow pipe. After the supernatant outlet is higher than the clean water tank 16, the supernatant of the sedimentation tank 15 can flow into the clean water tank 16 under the action of gravity, without the need to additionally set up a pump to pump the water into the clean water tank 16, reducing the energy consumption of the system.
[0049] In a specific embodiment, as Figure 1 shown, to reduce the impurities in the water in the clean water tank 16, the sedimentation tank 15 and the clean water tank 16 are connected through an overflow pipe, and a screen is provided in the overflow pipe. The screen is preferably a high-mesh screen, which can filter the water body flowing into the sedimentation tank 15 and filter out the fine particles mixed in, reducing the impurities in the water in the clean water tank 16.
[0050] In a specific embodiment, as Figure 1As shown, in order to control the modulation mixing amount of the mixer 17, the soil bin 18 includes a discharging device and a powder meter, and the discharging device is used to adjust the discharging amount according to the reading of the powder meter; a water purification automatic valve and a water purification flowmeter are connected to the communication pipeline between the water purification tank 16 and the mixer 17, and the water purification automatic valve is used to adjust the flow rate according to the reading of the water purification flowmeter; a sedimentation automatic valve and a sedimentation flowmeter are connected to the communication pipeline between the sedimentation tank 15 and the mixer 17, and the sedimentation automatic valve is used to adjust the flow rate according to the reading of the sedimentation flowmeter. When there are significant differences between the slurry in the sedimentation tank 15, the raw water in the water purification tank 16, and the reading of the bentonite and the preset amount, the outflow amounts of the discharging device, the water purification automatic valve, and the sedimentation automatic valve can be adjusted, and the prepared slurry is re-transported to the slurry shield machine 1 for use.
[0051] As a possible example, in this embodiment, as Figure 1 shown, the slurry shield mud circulation treatment system further includes a compression device, and the compression device is connected to the discharge port of the sedimentation tank 15, and the compression device is used to compress the slurry.
[0052] In a specific embodiment, as Figure 1 shown, the compression device includes a flocculant adding mechanism, a stirring tank 13, and a filter press 11; the flocculant adding machine is arranged in the stirring tank 13, and the flocculant adding machine can add flocculants to quickly flocculate the slurry; the feed port of the stirring tank 13 is connected to the discharge port of the sedimentation tank 15 through a pipeline, and the discharge port of the stirring tank 13 is connected to the filter press 11; the filter press 11 is used to compress the sludge, the discharge of the sedimentation tank 15 flows into the stirring tank 13 through a pipeline by the fifth slush pump 14, and the flocculated slurry flows into the filter press 11 through a pipeline by the sixth slush pump 12, and the filter press 11 compresses the slurry to obtain the compressed slag material.
[0053] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
[0054] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.
Claims
1. A slurry shield mud circulation treatment system, comprising: Slurry shield machine, primary screening device, secondary screening device, sedimentation tank and slurry mixing device; The slurry shield machine, the primary screening device, the secondary screening device, the sedimentation tank and the slurry mixing device are sequentially connected through pipelines to form a circulation path, and a pump group is connected to the pipeline of the circulation path; It is characterized in that The secondary screening device includes a hydrocyclone, and a first screening machine, a second screening machine and a third screening machine with different screen hole sizes; The hydrocyclone has a feed inlet, a coarse material outlet, a sand settling outlet and an overflow outlet; The feed inlet is connected to the primary screening device; The liquid inlet of the first screening machine is connected to the coarse material outlet, and the liquid outlet of the first screening machine is connected to the liquid inlet of the second screening machine; The liquid inlet of the second screening machine is also connected to the sand settling outlet, and the liquid outlet of the second screening machine is connected to the liquid inlet of the third screening machine; The liquid inlet of the third screening machine is also connected to the overflow outlet, and the liquid outlet of the third screening machine is connected to the sedimentation tank.
2. A slurry shield mud circulation treatment system according to claim 1, characterized in that The screen hole diameter of the primary screening device is 3 - 3.9 mm; The screen hole diameter of the first screening machine is 1.8 - 1.9 mm; The screen hole diameter of the second screening machine is 0.3 - 0.4 mm; The screen hole diameter of the third screening machine is 0.05 - 0.073 mm.
3. A slurry shield mud circulation treatment system according to claim 1, characterized in that The slurry mixing device includes a clean water tank, a soil material box and a mixer; The clean water tank is connected to the supernatant outlet of the sedimentation tank, and the water outlet of the clean water tank is connected to the water inlet of the mixer; The discharge outlet of the soil material box is connected to the mixer; The water inlet of the mixer is also connected to the discharge outlet of the sedimentation tank.
4. The slurry circulation treatment system for a slurry shield according to claim 3, characterized in that, The supernatant outlet of the sedimentation tank is higher than the clean water tank.
5. The slurry circulation and treatment system for a slurry shield according to claim 4, wherein The sedimentation tank and the clean water tank are connected through an overflow pipe, and a screen is arranged in the overflow pipe.
6. A slurry shield mud circulation treatment system according to claim 3, characterized in that The soil material box includes a discharging device and a powder meter, and the discharging device is used to adjust the discharging amount according to the reading of the powder meter; A clean water automatic valve and a clean water flowmeter are connected to the connecting pipeline between the clean water tank and the mixer, and the clean water automatic valve is used to adjust the flow rate according to the reading of the clean water flowmeter; A sediment automatic valve and a sediment flowmeter are connected to the connecting pipeline between the sedimentation tank and the mixer, and the sediment automatic valve is used to adjust the flow rate according to the reading of the sediment flowmeter.
7. A slurry shield mud circulation treatment system according to claim 1, characterized in that A pressure relief device is arranged in the sedimentation tank.
8. The slurry circulation and treatment system for a slurry shield according to claim 1, characterized in that, The slurry shield mud circulation treatment system further includes a compression device; the compression device is connected to the discharge outlet of the sedimentation tank, and the compression device is used to compress the slurry.
9. The slurry circulation and treatment system for slurry shield according to claim 8, wherein, The compression device includes a flocculant adding mechanism, a stirring barrel and a filter press; The flocculant adding machine is arranged in the stirring barrel; The feed inlet of the stirring barrel is connected to the discharge outlet of the sedimentation tank, and the discharge outlet of the stirring barrel is connected to the filter press; The filter press is used to compress the mud residue.