A mud treatment system

Abstract

The present application belongs to the technical field of shield mud treatment, and discloses a mud treatment system, which comprises a sedimentation tank, a storage tank, a mud mixing tank and a clean water tank. The sedimentation tank is communicated with a mud discharge pipeline, and a plurality of partitions are arranged in the middle of the sedimentation tank. The plurality of partitions divide the sedimentation tank into a plurality of sub-sedimentation tanks. A grid is arranged in each of the plurality of sub-sedimentation tanks, and a V-shaped chute is arranged at the bottom of each sub-sedimentation tank. An overflow port is formed in each partition, and a plurality of overflow ports are arranged staggeredly. The storage tank is communicated with the V-shaped chute, and the V-shaped chute can deliver the silt to the storage tank. The mud mixing tank is communicated with the storage tank and a mud delivery pipeline, and a vibrating pipe and a spiral mud are arranged in the mud mixing tank. One side of the clean water tank is communicated with the sub-sedimentation tank, and the other side is communicated with the mud mixing tank. Through the arrangement, the mud-water separation effect is good, the slurry can be reused, the efficiency of the new slurry preparation is high, the quality of the mud can meet the requirements of the mud-water shield scale model test, and the accuracy of the results of the mud-water shield scale model test is ensured.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring machine slurry treatment technology, and more particularly to a slurry treatment system. Background Technology

[0002] With the development of underground space construction, the application of tunnel boring machines (TBMs) is becoming increasingly widespread. Slurry shield tunneling machines, as a type of TBM, are widely used in underground engineering construction due to their excellent adaptability to different geological formations. Their working principle involves the TBM injecting grout into the slurry chamber through grouting pipes. The drive unit rotates the cutterhead, cutting the soil on the excavation face. The cut soil enters the slurry chamber through the gap in the cutterhead, mixes with the slurry, and is then discharged through the slurry discharge pipe. Therefore, in slurry shield tunneling, the quality of the slurry is a crucial foundation for controlling the tunneling quality. The slurry recycled from the tunneling process must meet the requirements for reuse. Therefore, to ensure tunneling quality, the slurry's specific gravity, viscosity, and particle size need to be treated. Among these, the equipment for separating and treating the slurry has the most direct impact on its performance.

[0003] However, when studying issues such as cutterhead sludge cake formation and air cushion sludge discharge through scaled-down model tests of slurry shield tunnels, the existing slurry separation and treatment equipment has poor slurry separation effect, low slurry reuse rate, and low efficiency in preparing new slurry, resulting in poor accuracy of the slurry shield tunnel scaled-down model test results.

[0004] Therefore, there is an urgent need for a mud treatment system to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a mud treatment system to solve the problems of poor mud-water separation effect, low reuse rate of mud and low efficiency of preparing new mud when treating the sludge discharged from the cutterhead in the scaled-down model test of slurry shield tunneling, which leads to poor accuracy of the test results.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A mud treatment system, comprising:

[0008] A sedimentation tank is connected to a slurry discharge pipeline. Multiple baffles are provided in the sedimentation tank at intervals, which divide the sedimentation tank into multiple sub-sedimentation tanks. Each sub-sedimentation tank is equipped with a grid, and a V-shaped trough is provided at the bottom of each sub-sedimentation tank. Each baffle is provided with an overflow port, and the multiple overflow ports are arranged alternately.

[0009] A storage tank is connected to the V-shaped trough, which can transport sediment to the storage tank.

[0010] The slurry preparation tank is connected to the storage tank and the slurry delivery pipeline. The slurry preparation tank is equipped with a vibrating pipe and a rotary propeller. The vibrating pipe can vibrate the slurry in the slurry preparation tank, and the rotary propeller can agitate the slurry in the slurry preparation tank.

[0011] A water purification tank, one side of which is connected to the sub-sedimentation tank and the other side of which is connected to the slurry conditioning tank.

[0012] Preferably, multiple vibrating tubes are provided, and the multiple vibrating tubes are arranged circumferentially along the inner wall of the slurry conditioning tank, with the propeller located in the middle of the slurry conditioning tank.

[0013] Preferably, multiple baffles are provided between the multiple vibrating tubes and the propeller, and the multiple baffles correspond one-to-one with the multiple vibrating tubes and are arranged in parallel.

[0014] Preferably, the V-shaped trough includes a hopper, one end of which is connected to the sub-sedimentation tank, and the other end is provided with a first control valve.

[0015] Preferably, a pipe is provided between the V-shaped trough and the storage pool, and a delivery pump is installed on the pipe.

[0016] Preferably, the slurry discharge pipeline is equipped with a slurry discharge pump and a second control valve.

[0017] Preferably, the power of the vibrating tube is 0.7 to 0.75 kW and the frequency is 7000 to 8000 r / min.

[0018] Preferably, the grille is inclined.

[0019] The beneficial effects of this invention are:

[0020] The mud treatment system provided by this invention transports slurry from the cutterhead of a tunnel boring machine to a sedimentation tank via a slurry discharge pipeline. The sedimentation tank is divided into multiple sub-sedimentation tanks by multiple baffles, each baffle having an overflow port. This allows the slurry to flow sequentially through these sub-sedimentation tanks. During flow, the slurry is impeded by the grid, accelerating sedimentation. Furthermore, the staggered overflow ports create an S-shaped flow path for the slurry within the sub-sedimentation tanks, thus extending the flow path and enabling… The sediment in the slurry settles more thoroughly. A V-shaped trough is installed at the bottom of the sub-sedimentation tank, collecting the sediment settled there and then transporting it to a storage tank. The purified water from the settled slurry is then transported to a clean water tank. When new slurry needs to be prepared, the clean water from the clean water tank and the sediment from the storage tank are transported to the slurry preparation tank. A vibrating pipe is activated to vibrate the water and sediment, and a rotary propeller is activated to agitate them, ensuring thorough mixing to form slurry. This slurry is then transported back to the cutterhead of the tunnel boring machine (TBM) through a slurry delivery pipeline. This slurry treatment system achieves good mud-water separation, allows for slurry reuse, and has a high efficiency in preparing new slurry. It meets the slurry quality requirements for scaled-down model tests of slurry-water shield tunneling, thus ensuring the accuracy of the test results. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the mud treatment system provided in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the sedimentation tank provided in an embodiment of the present invention;

[0023] Figure 3 This is a top view of the sedimentation tank provided in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the slurry conditioning tank provided in an embodiment of the present invention.

[0025] In the picture:

[0026] 100. Slurry discharge pipeline; 101. Slurry discharge pump; 102. Second control valve; 200. Slurry delivery pipeline;

[0027] 1. Sedimentation tank; 11. Baffle plate; 111. Overflow outlet; 12. Sub-sedimentation tank; 121. Grille; 13. V-shaped trough; 131. Hopper; 132. First control valve;

[0028] 2. Storage tank; 21. Pipeline; 22. Transfer pump;

[0029] 3. Slurry mixing tank; 31. Vibrating pipe; 32. Rotary propeller; 33. Baffle;

[0030] 4. Water purification tank. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0032] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0035] like Figures 1 to 4 As shown, this embodiment provides a slurry treatment system, including a sedimentation tank 1, a storage tank 2, a slurry conditioning tank 3, and a purification tank 4. The sedimentation tank 1 is connected to a slurry discharge pipeline 100. Multiple baffles 11 are spaced apart in the sedimentation tank 1, dividing it into multiple sub-sedimentation tanks 12. Each sub-sedimentation tank 12 is equipped with a grid 121, and a V-shaped trough 13 is provided at the bottom of each sub-sedimentation tank 12. Each baffle 11 has an overflow port 111, and the multiple overflow ports 111 are staggered (e.g., ...). Figure 3(As shown); Storage tank 2 is connected to V-shaped trough 13, which can transport mud and sand to storage tank 2; Slurry mixing tank 3 is connected to storage tank 2 and slurry delivery pipeline 200. Slurry mixing tank 3 is equipped with vibrating pipe 31 and vortex 32. Vibrating pipe 31 can vibrate the mud in slurry mixing tank 3, and vortex 32 can agitate the mud in slurry mixing tank 3; One side of water purification tank 4 is connected to sub-sedimentation tank 12, and the other side is connected to slurry mixing tank 3.

[0036] The mud treatment system provided in this embodiment transports slurry from the tunnel boring machine cutterhead to a sedimentation tank 1 via a slurry discharge pipe 100. Since the sedimentation tank 1 is divided into multiple sub-sedimentation tanks 12 by multiple baffles 11 spaced apart, and each baffle 11 has an overflow port 111, the slurry can flow sequentially through the multiple sub-sedimentation tanks 12. During the flow, the slurry is blocked by the grid 121, which accelerates the sedimentation of silt in the slurry. Furthermore, because the multiple overflow ports 111 are staggered, the slurry flows through the multiple sub-sedimentation tanks 12 in an S-shape, thereby extending the slurry's flow path and enabling… This system allows for more thorough sedimentation of sludge in the slurry. A V-shaped trough 13 is installed at the bottom of the sub-sedimentation tank 12, collecting the sediment settled there before it is transported to the storage tank 2. The purified water formed after sedimentation is then transported to the clean water tank 4. When new slurry needs to be prepared, the clean water in the clean water tank 4 and the sediment in the storage tank 2 are transported to the slurry preparation tank 3. The vibrating pipe 31 is activated to vibrate the clean water and sediment, and the rotary propeller 32 is activated to agitate them, ensuring thorough mixing and the formation of slurry. The slurry is then transported back to the cutterhead of the tunnel boring machine via the slurry delivery pipeline 200. This slurry treatment system achieves good mud-water separation, allows for sludge reuse, and has a high efficiency in preparing new slurry. It meets the slurry quality requirements for scaled-down model tests of slurry-water shield tunneling, thus ensuring the accuracy of the test results.

[0037] Optionally, the grille 121 is inclined. By placing the grille 121 at a reasonable angle, the stratification of silt and purified water can be accelerated, thereby accelerating the sedimentation of silt. Specifically, in this embodiment, the grille 121 is made of a hard alloy material, such as tungsten-cobalt, tungsten-titanium-cobalt, or tungsten-titanium-tantalum (niobium) alloy. Hard alloy materials have the functions of non-sticking, strong anti-adhesion, and are not easy to adhere to silt. This not only accelerates the sedimentation of silt but also prevents silt from clogging the through holes in the grille 121, thus preventing purified water from passing through.

[0038] Optionally, such as Figure 4As shown, multiple vibrating pipes 31 are arranged circumferentially along the inner wall of the slurry mixing tank 3, and a propeller 32 is positioned in the middle of the slurry mixing tank 3. By arranging multiple vibrating pipes 31 circumferentially along the inner wall of the slurry mixing tank 3, the vibration range of the vibrating pipes 31 on the slurry can be expanded, allowing for more thorough mixing of mud and sand and purified water, and preventing mud and sand sedimentation. By positioning the propeller 32 in the middle of the slurry mixing tank 3, the turbulence of the slurry can be enhanced, further improving the mixing effect of mud and sand and purified water.

[0039] Optionally, such as Figure 4 As shown, multiple baffles 33 are arranged between multiple vibrating pipes 31 and the propeller 32, with each baffle corresponding to and parallel to one of the vibrating pipes 31. It is understood that the mud will undergo turbulence and generate vortices under the action of the propeller 32, causing some mud and sand to accumulate in the vortices, resulting in uneven mixing of mud and sand with purified water. The multiple baffles 33 between the vibrating pipes 31 and the propeller 32 allow the mud to flow axially in the mixing tank 3. The vibrating pipes arranged circumferentially along the inner wall of the mixing tank 3 cooperate with the baffles 33 to improve the poor fluidity of the slurry between the propeller 32 and the surrounding walls of the mixing tank 3, eliminating the surface depressions and vortices caused by the high-speed rotation of the mud, and improving the mixing effect of mud and sand with purified water.

[0040] Optionally, in this embodiment, the power of the vibrating tube 31 is 0.7–0.75 kW, and the frequency is 7000–8000 r / min. This allows for sufficient vibration of the mud in the slurry conditioning tank 3, improving the uniformity of the mud's specific gravity.

[0041] Optionally, such as Figure 2 As shown, the V-shaped trough 13 includes a hopper 131, one end of which is connected to the sub-sedimentation tank 12, and the other end is equipped with a first control valve 132. It can be understood that when the sediment in the hopper 131 accumulates to a certain height, the first control valve 132 is opened. With the opening of the first control valve 132, the original hydraulic balance of the sediment is broken, the direction of water pressure changes, and the sediment flows approximately vertically under a certain pressure head. Therefore, the hopper 131 should be equipped with a suitable slope. When the first control valve 132 is open, the downward force of the sediment due to gravity is equal to or greater than the resistance to its flow, allowing the sediment to slide out of the first control valve 132 in a timely manner, thereby ensuring the continuity and thoroughness of sediment discharge.

[0042] Specifically, in this embodiment, the slope of hopper 131 is determined based on the actual soil properties, mud concentration, and viscosity. The sliding of mud and sand mainly considers the sliding friction between the mud and sand and the inner wall of hopper 131, as well as the sliding friction between mud and sand particles. The slope of hopper 131 is calculated and designed using the following formula:

[0043]

[0044] In the formula, tanθ is the slope of hopper 131, and γ s γ represents the specific gravity of sediment; γ represents the specific gravity of water. denoted as the friction coefficient of the sediment; h is the height of the sediment surface above the clean water surface; and d is the thickness of the sediment.

[0045] Optionally, such as Figure 1 As shown, a pipe 21 is provided between the V-shaped hopper 13 and the storage tank 2, and a conveying pump 22 is installed on the pipe 21. After the first control valve 132 is opened, the mud and sand in the hopper 131 are conveyed to the storage tank 2 through the pipe 21 by the conveying pump 22, which can prevent the mud and sand in the hopper 131 from being obstructed.

[0046] Optionally, such as Figure 1 As shown, a slurry discharge pump 101 and a second control valve 102 are installed on the slurry discharge pipeline 100. The slurry discharge pump 101 and the second control valve 102 can control the rate at which waste slurry is input into the sedimentation tank 1, thereby controlling the sedimentation rate of silt in the sedimentation tank 1, and thus ensuring that the silt is effectively settled in the sedimentation tank 1.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A mud treatment system, characterized in that, include: A sedimentation tank (1) is connected to a slurry discharge pipeline (100). Multiple partitions (11) are provided in the sedimentation tank (1) at intervals. The multiple partitions (11) divide the sedimentation tank (1) into multiple sub-sedimentation tanks (12). Each of the multiple sub-sedimentation tanks (12) is provided with a grid (121), and a V-shaped trough (13) is provided at the bottom of each sub-sedimentation tank (12). Each partition (11) is provided with an overflow port (111), and the multiple overflow ports (111) are staggered. The storage tank (2) is connected to the V-shaped trough (13), which can transport silt and sand to the storage tank (2); The slurry preparation tank (3) is connected to the storage tank (2) and the slurry delivery pipeline (200). The slurry preparation tank (3) is equipped with a vibrating pipe (31) and a rotary propeller (32). The vibrating pipe (31) can vibrate the slurry in the slurry preparation tank (3), and the rotary propeller (32) can agitate the slurry in the slurry preparation tank (3). A water purification tank (4) is connected to the sub-sedimentation tank (12) on one side and to the slurry conditioning tank (3) on the other side. When it is necessary to prepare new slurry, the clean water in the water purification tank (4) and the silt in the storage tank (2) are transported to the slurry preparation tank (3), the vibrating pipe (31) is started to vibrate the clean water and silt, and the cyclone (32) is started to stir the clean water and silt, so that the clean water and silt are fully mixed to form slurry. The slurry is then transported back to the cutterhead of the tunnel boring machine through the slurry delivery pipeline (200). Multiple vibrating tubes (31) are provided, and multiple vibrating tubes (31) are arranged circumferentially along the inner wall of the slurry conditioning tank (3). The propeller (32) is located in the middle of the slurry conditioning tank (3). Multiple baffles (33) are provided between the multiple vibrating tubes (31) and the propeller (32), and the multiple baffles (33) correspond one-to-one with the multiple vibrating tubes (31) and are arranged in parallel.

2. The mud treatment system according to claim 1, characterized in that, The V-shaped trough (13) includes a hopper (131), one end of which is connected to the sub-sedimentation tank (12), and the other end is provided with a first control valve (132).

3. The mud treatment system according to claim 2, characterized in that, A pipe (21) is provided between the V-shaped trough (13) and the storage pool (2), and a conveying pump (22) is provided on the pipe (21).

4. The mud treatment system according to claim 1, characterized in that, The slurry discharge pipeline (100) is equipped with a slurry discharge pump (101) and a second control valve (102).

5. The mud treatment system according to any one of claims 1-4, characterized in that, The power of the vibrating tube (31) is 0.7 to 0.75 KW and the frequency is 7000 to 8000 r / min.

6. The mud treatment system according to any one of claims 1-4, characterized in that, The grille (121) is set at an angle.

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