Slurry floating liquid treatment device for shield slurry

Abstract

The embodiment of the utility model discloses a slurry floating liquid treatment device for shield slurry, which comprises a precipitation container, and the precipitation container is provided with a slurry inlet structure, a liquid outlet and a slurry outlet; the liquid outlet is formed in one side of the precipitation container and is used for discharging floating liquid of which the liquid level reaches the liquid outlet; the slurry outlet is formed in the position lower than the liquid outlet and used for discharging slurry reaching the preset height after sedimentation, and the slurry inlet structure is arranged on the side, away from the liquid outlet, in the sedimentation container and used for preventing shield slurry newly entering from the slurry inlet structure from disturbing floating liquid which is subjected to sedimentation and layering at the liquid outlet. The distance between the slurry inlet structure and the liquid outlet reaches the preset length or above, so that the entering shield slurry has enough space and time for precipitation. According to the embodiment, the liquid outlet position is fixed and does not need to be manually adjusted according to the position of the boundary between the floating liquid and the sediment or the position of the floating liquid level, and the treatment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of slurry shield construction, in particular to a mud floating liquid processing device for shield mud. Background Art

[0002] At present, with the acceleration of the pace of domestic urban rail transit, slurry shield machines are widely used in subway construction in major cities. Due to the high environmental protection requirements of municipal engineering, the traditional way of handling waste mud generated during construction is to transport it to designated locations in the suburbs by ship or slurry tanker. The waste mud generated during the construction of slurry shield is large in amount and needs to be treated.

[0003] Patent publication number CN221275598U describes a mud processing device for subway construction. The device observes the sedimentation situation in the sedimentation frame through an observation window, thereby observing the mud-water separation position, and then facilitates the adjustment of the position of the water absorption component to absorb water. The position of the water absorption component is automatically adjusted through the cooperation between the drive component and the screw rod, avoiding manual adjustment of the water absorption component by construction personnel, thereby improving the water absorption efficiency.

[0004] Patent publication number CN217613416U describes a shield slag suspension separation device, which can achieve upper suspension separation at any water level during operation based on its own adjustable diaphragm separator and avoid the liquid level dropping and the mud pump being burned out due to the suction of mud in the pump.

[0005] However, the devices described in these two patents both have the problem of requiring manual adjustment of the drainage position according to the boundary position between the floating liquid and the sediment or the floating liquid surface position each time the shield mud settles when discharging the floating liquid, which leads to low processing efficiency. Utility Model Content

[0006] The embodiment of the utility model discloses a mud floating liquid processing device for shield mud, which realizes continuous processing of the shield mud.

[0007] An embodiment of the present utility model provides a mud floating liquid processing device for shield mud, including a sedimentation container, wherein the sedimentation container is provided with a slurry inlet structure, a liquid outlet and a slurry outlet; the liquid outlet is arranged on one side of the sedimentation container, for discharging the floating liquid whose liquid surface reaches the liquid outlet; the slurry outlet is arranged at a position lower than the liquid outlet, for discharging the mud that reaches a preset height after sedimentation, the slurry inlet structure is arranged on a side of the sedimentation container away from the liquid outlet, for avoiding the shield mud newly entering from the slurry inlet structure from disturbing the floating liquid that has been settled and stratified at the liquid outlet, and the distance between the slurry inlet structure and the liquid outlet reaches more than the preset length, so that the shield mud entering has enough space and time to settle.

[0008] Furthermore, the precipitation container is a precipitation tank with an open top.

[0009] Furthermore, the preset length is 3m.

[0010] Furthermore, the bottom of the sedimentation container is arranged to be inclined so as to prevent the newly input shield slurry from gathering on one side of the sedimentation container.

[0011] Furthermore, the slurry inlet structure is a slurry inlet pipe, and the outlet position of the slurry inlet pipe is lower than the liquid outlet, so as to avoid the newly entered shield slurry disturbing the floating liquid layer near the liquid outlet.

[0012] Furthermore, the bottom of the precipitation container is a contracted structure with a cross-sectional area gradually decreasing from top to bottom.

[0013] Furthermore, the slurry outlet of the precipitation container is arranged at the bottom of the precipitation container.

[0014] Furthermore, it includes a flotation liquid container, which is provided with a liquid inlet. The liquid inlet of the flotation liquid container is connected to the liquid outlet of the sedimentation container. The liquid outlet of the sedimentation container is higher than the liquid inlet of the flotation liquid container or is level with the liquid inlet of the flotation liquid container. The flotation liquid container is used to recover the flotation liquid discharged from the liquid outlet of the sedimentation container.

[0015] Furthermore, the liquid outlet of the precipitation container is connected to a filtering device, and the filtering device is used to filter impurities in the floating liquid during the floating liquid recovery process.

[0016] Furthermore, the filtering device is configured as a mesh trough structure, the filtering device is disposed in the flotation liquid container, and the inlet of the filtering device is connected to the liquid inlet of the flotation liquid container.

[0017] It can be seen from the technical solution that the embodiment provided by the utility model has the following advantages:

[0018] This embodiment provides a shield tunneling mud supernatant processing device. The device continuously feeds slurry from a slurry feed structure. The slurry feed structure is positioned away from the liquid outlet to prevent newly entering shield tunneling mud from disturbing the already settled and stratified supernatant at the liquid outlet. Furthermore, the length of the sedimentation container is set sufficiently long to allow newly entering shield tunneling mud sufficient space and time to settle. The slurry outlet is positioned below the liquid outlet to discharge the settled slurry that has reached a preset height. Through this structural arrangement, after slurry is initially fed, sedimentation occurs within the sedimentation container until supernatant discharge begins. Continuous slurry feeds are then continued for sedimentation, resulting in continuous supernatant discharge from the liquid outlet. After the sedimented slurry reaches a preset height, it is discharged from the liquid outlet, thus avoiding disturbance of the clarity of the supernatant. The discharge position of this embodiment is fixed, eliminating the need for manual adjustment based on the boundary between the supernatant and the sediment or the level of the supernatant, thereby improving treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic structural diagram of a shield mud flotation liquid processing device provided in an embodiment of the present utility model;

[0021] Description of the drawings: 1. Sedimentation container; 2. Slurry inlet pipe; 3. Slurry pump; 4. Chute; 5. Filter device; 6. Floatation liquid container; 7. Liquid discharge pump; 8. Slurry making barrel; 9. Stirring mechanism; 10. Bentonite feeding device; 11. Liquid outlet; 12. Slurry outlet; 13. Liquid inlet; 14. Output port. DETAILED DESCRIPTION

[0022] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0024] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0025] It should be understood that although the steps in the flowcharts of the accompanying drawings are shown in sequence as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the flowcharts of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

[0026] The embodiment of the utility model discloses a mud floating liquid processing device for shield mud.

[0027] See also Figure 1 An embodiment of a shield mud flotation liquid processing device provided in an embodiment of the present utility model includes:

[0028] It includes a sedimentation container 1, which is provided with a liquid outlet 11 and a slurry outlet 12; the liquid outlet 11 is arranged on one side of the sedimentation container 1 and is kept unobstructed, and is used to discharge the floating liquid whose liquid surface reaches the liquid outlet 11; the slurry outlet 12 is set at a position lower than the liquid outlet 11, and is used to discharge the slurry after sedimentation.

[0029] It can be understood that the position of the liquid outlet 11 of this embodiment is fixed and remains unobstructed. When the floating liquid reaches the liquid outlet 11, it is automatically discharged from the liquid outlet 11, and the precipitated mud is directly discharged from the slurry outlet 12, realizing continuous processing of the shield mud, achieving the effect of improving the shield mud processing efficiency and increasing the processing volume.

[0030] It should be noted that, on the one hand, when the floating liquid level in the sedimentation container 1 has not reached the liquid outlet 11, the slurry outlet 12 is closed or the mud discharge speed is slowed down, so that the floating liquid level rises to the liquid outlet 11, and the floating liquid is discharged; on the other hand, when the floating liquid level in the sedimentation container 1 reaches the liquid outlet 11, when the mud layer after sedimentation reaches a preset height, in order not to affect the clarity of the floating liquid, the slurry outlet 12 is opened or the mud discharge speed is increased; on the other hand, when the floating liquid level in the sedimentation container 1 reaches the liquid outlet 11, the opening and closing time or the discharge speed of the mud at the slurry outlet 12 is reasonably set according to the speed of new shield mud entering the sedimentation container 1 and the sedimentation speed of the mud in the sedimentation container 1, so that the discharge of the floating liquid in the sedimentation container 1, the sedimentation of the shield mud and the discharge of the mud after sedimentation are in a continuous and stable equilibrium state, thereby realizing continuous treatment of the shield mud, and achieving the effect of improving the shield mud treatment efficiency and increasing the treatment volume.

[0031] In a more specific embodiment, the sedimentation container 1 is a sedimentation tank with an open top. It is understood that, on the one hand, the open structure of the sedimentation tank facilitates the injection of shield slurry from the slot. On the other hand, the open structure of the sedimentation tank allows operators to visually observe the sedimentation process and results of the slurry. In some more specific embodiments, an observation window is provided on the side of the sedimentation container 1 for observing the sedimentation conditions within the container. In other more specific embodiments, the sedimentation container 1 is made of a light-transmitting material, and when light penetrates the sedimentation container 1, the sedimentation conditions within the sedimentation container 1 can be observed.

[0032] In a more specific embodiment, the sedimentation container 1 is provided with a slurry inlet structure, which is arranged on a side away from the liquid outlet 11, and is used to avoid the shield mud newly entering from the slurry inlet structure from disturbing the floating liquid that has settled and stratified at the liquid outlet 11, ensuring the relative clarity of the floating liquid at the liquid outlet 11, and helping the mud to be stratified and precipitated more orderly in the sedimentation container 1, thereby further improving the sedimentation efficiency.

[0033] In a more preferred embodiment, since the length of the sedimentation container 1 is designed to be long enough, in this embodiment, the length of the sedimentation container is 3-5m, which can ensure that there is enough distance and time for the sedimentation to proceed fully, thereby achieving a good sedimentation effect, and the processing capacity is large. It should be noted that, in this embodiment, it takes about 20 seconds to wait from the start of slurry feeding to the start of discharging the floating liquid, and thereafter, continuous slurry feeding for sedimentation will result in continuous discharge of the floating liquid.

[0034] In a more specific embodiment, the slurry inlet structure is a slurry inlet pipe 2, and the outlet position of the slurry inlet pipe 2 is lower than the liquid outlet 11, so as to avoid the newly entered shield mud from disturbing the floating liquid layer near the liquid outlet 11, and ensure the relative clarity of the floating liquid layer above the outlet of the slurry inlet pipe 2.

[0035] In a more specific embodiment, the outlet position of the slurry inlet pipe 2 is lower than the liquid outlet 11, which minimizes the disturbance of the floating liquid layer near the liquid outlet 11 by the newly entered shield mud and ensures that the floating liquid passing through the liquid outlet 11 is relatively clear.

[0036] In a more specific embodiment, the outlet of the slurry inlet pipe 2 is located away from the slurry outlet 12. It is understandable that during the continuous processing, when the slurry outlet 12 discharges the settled slurry, the slurry inlet pipe 2 simultaneously outputs the shield slurry. The outlet of the slurry inlet pipe 2 is located away from the slurry outlet 12 to prevent the newly entered, unsettled shield slurry from mixing into the slurry outlet 12.

[0037] In a more specific embodiment, the slurry outlet 12 is located at the bottom of the sedimentation tank. As can be appreciated, this not only allows the settled slurry to flow out more smoothly by directly utilizing gravity, but also increases the discharge rate, ensuring timely discharge of the settled slurry without impacting subsequent processing. Furthermore, it minimizes the mixing of floating liquid into the slurry.

[0038] It should be noted that, on the one hand, when the level of the floating liquid in the sedimentation container 1 does not reach the liquid outlet 11, the slurry outlet 12 is closed or the mud discharge speed is slowed down to make the floating liquid level rise to the liquid outlet 11, so as to realize the discharge of the floating liquid; on the other hand, when the level of the floating liquid in the sedimentation container 1 reaches the liquid outlet 11, when the mud layer after sedimentation reaches the preset height, in order not to affect the clarity of the floating liquid, the slurry outlet 12 is opened or the mud discharge speed is increased. The preset height is the vertical distance from the slurry outlet 12 to the top surface of the mud layer, and the liquid outlet height is the vertical distance from the slurry outlet 12 to the liquid outlet. 11, the preset height is less than 70% of the height of the liquid outlet; on the other hand, the liquid level of the floating liquid in the sedimentation container 1 reaches the liquid outlet 11, and according to the speed of new shield mud entering the sedimentation container 1 and the sedimentation speed of the mud in the sedimentation container 1, the opening and closing time or the discharge speed of the mud at the slurry outlet 12 is reasonably set, so that the discharge of the floating liquid in the sedimentation container 1, the sedimentation of the shield mud and the discharge of the mud after sedimentation are in a continuous and stable equilibrium state, thereby realizing the continuous treatment of the shield mud, and achieving the effect of improving the shield mud treatment efficiency and increasing the treatment volume.

[0039] In a more specific embodiment, the bottom of the sedimentation container 1 is tilted to prevent the shield mud output from the slurry inlet pipe 2 from accumulating on the side of the sedimentation container 1 close to the slurry inlet pipe 2, so that the shield mud newly output from the slurry inlet pipe 2 has enough space to settle, thereby improving the sedimentation efficiency.

[0040] In a more specific embodiment, the bottom of the sedimentation container 1 is a contracted structure whose cross-sectional area gradually decreases from top to bottom. It is understandable that, on the one hand, the contracted structure facilitates the slurry to gather and settle more easily in the central area of ​​the bottom during the flow process, thereby improving the sedimentation efficiency; on the other hand, the slurry outlet 12 is arranged at the bottom of the contracted structure, which can reduce the dispersion and turbulence of the precipitated slurry during the discharge process, thereby reducing the discharge resistance of the precipitated slurry. In some more specific embodiments, combined with the structure of the sedimentation container 1, the contracted structure is in the shape of an inverted triangular prism, cone, or pyramid. In a more specific embodiment, the angle between the inclined surface of the contracted structure and the bottom surface of the contracted structure is 30°.

[0041] In a more specific embodiment, it includes a flotation liquid container 6, which is provided with a liquid inlet 13, and the liquid inlet 13 is connected to the liquid outlet 11 of the sedimentation container 1, and the liquid outlet 11 is higher than the liquid inlet 13 or level with the liquid inlet 13. The flotation liquid container 6 is used to recover the flotation liquid discharged from the liquid outlet 11 of the sedimentation container 1. It can be understood that when the liquid level of the flotation liquid in the sedimentation container 1 reaches the liquid outlet 11, the flotation liquid flows to the flotation liquid tank.

[0042] In a more specific embodiment, the floatation fluid container 6 is a floatation fluid tank with an open top. It is understandable that the open structure of the floatation fluid tank facilitates the injection of floatation fluid from the notch on the one hand. On the other hand, the open structure of the floatation fluid tank allows the operator to visually observe the operating conditions in the floatation fluid container 6.

[0043] In a more specific embodiment, a channel connected to the floatation liquid container 6 is provided at the liquid outlet 11 of the sedimentation container 1, and the channel is horizontally arranged. In some more specific embodiments, the channel is tilted downward. It can be understood that the floatation liquid flowing out of the liquid outlet 11 still contains impurities. The downward tilt of the channel is conducive to the rapid discharge of the floatation liquid and the impurities therein, avoiding the accumulation of impurities in the channel to cause blockage or affect the discharge efficiency of the floatation liquid.

[0044] In a more specific embodiment, the channel is a chute 4, and the top of the chute 4 is open. The cross-sectional size of the chute 4 can be designed and adjusted according to actual needs, which can meet the liquid transportation requirements of different flow rates. The liquid flow resistance is small, which is conducive to achieving large flow transportation and convenient for observing the outflow of the floating liquid. In some more specific embodiments, the channel is a pipe, which effectively prevents the floating liquid from overflowing from the channel when the flow rate is too large.

[0045] In a more specific embodiment, the liquid outlet 11 is connected to a filter device 5, which is used to filter impurities in the floating liquid during the floating liquid recovery process. In a more specific embodiment, the filter device 5 is set at the liquid outlet 11 in the sedimentation container 1 to prevent impurities from entering the channel and causing channel blockage; in some more specific embodiments, the filter device 5 is set in the middle of the channel, which can more conveniently perform maintenance, cleaning, and replacement of filter materials, and does not affect the operations in the sedimentation container 1 and the floating liquid container, and can be performed simultaneously; in other more specific embodiments, the filter device 5 is set in the floating liquid container 6 to avoid affecting the liquid outlet 11 and the liquid flow rate of the channel.

[0046] In some more specific embodiments, the filter device 5 is configured as a mesh groove structure, the filter device 5 is arranged in the floatation liquid container 6, and the liquid inlet 13 of the filter device 5 is connected to the liquid inlet 13 of the floatation liquid container 6. It can be understood that the mesh groove usually has a large filtering area, and its shape can be designed to be flat or rectangular, etc., which can provide a relatively large filtering surface in a limited space, which allows more liquid to pass through the filter screen at the same time, improves the filtering efficiency, and realizes the recovery of impurities while filtering, which facilitates the removal of impurities for reuse.

[0047] In a more specific embodiment, the bottom of the floatation liquid container 6 is provided with an output port 14, which is connected to the liquid outlet pump 7. It is understandable that the setting of the floatation liquid container 6 can increase the storage volume of the floatation liquid and reduce the operating frequency of the liquid outlet pump 7.

[0048] In a more specific embodiment, a liquid level sensor is provided inside the floatation liquid container 6, and the liquid level sensor is connected to the liquid outlet pump 7. When the liquid level sensor identifies that the liquid level reaches a set height, the liquid outlet pump 7 is started to output and recover the liquid in the floatation liquid container 6.

[0049] In a more specific embodiment, the floatation liquid container 6 is provided with a high liquid level sensor and a low liquid level sensor. The high liquid level sensor is disposed at the upper portion of the floatation liquid container 6 and below the liquid inlet 13 of the floatation liquid container 6, while the low liquid level sensor is disposed at the lower portion of the floatation liquid container 6. It will be understood that, in a specific implementation, when the floatation liquid level reaches the high liquid level, the liquid discharge pump 7 is activated to pump the liquid out of the floatation liquid container 6. When the liquid in the floatation liquid container 6 reaches the low liquid level, the liquid discharge pump 7 stops operating.

[0050] In some more specific embodiments, the floatation liquid container 6 is provided with a liquid level switch, which is connected to the liquid outlet pump 7 . The liquid level switch includes an upper limit and a lower limit, and the upper limit is higher than the lower limit.

[0051] The embodiment of the present utility model also provides a sedimentation slurry processing system, comprising a slurry making barrel 8, a stirring mechanism 9, a bentonite feeding device 10, a slurry pump 3 and a conveying medium;

[0052] The slurry outlet 12 of the sedimentation container 1 is connected to the slurry barrel 8 through a conveying medium, a slurry pump 3 is provided on the conveying medium, a slurry bentonite feeding device 10 is connected to the slurry barrel 8, and a stirring end of the stirring mechanism 9 is provided inside the slurry barrel 8. It can be understood that when the slurry pump 3 is turned on, the sedimentation residue in the sedimentation container 1 is transported from the slurry outlet 12 to the slurry barrel 8 through the conveying medium, the slurry bentonite feeding device 10 provides slurry bentonite to the slurry barrel 8, and the stirring mechanism 9 stirs and mixes.

[0053] In a more specific embodiment, the transport medium is a transport pipeline.

[0054] The working principle of this utility model is:

[0055] The shield slurry enters the sedimentation container 1 through the slurry inlet pipe 2. Due to the influence of its own gravity, the silt with a specific gravity greater than that of water gradually reaches the bottom of the sedimentation container 1, and the impurities with a specific gravity less than that of water will sink or float on the upper layer of the water surface.

[0056] As the slurry from the slurry inlet pipe 2 continuously pours in, the liquid level continuously rises. Finally, the clearer floating liquid arrives at the floating liquid container 6 through the slide pipe, and the impurities in the floating liquid can be filtered out by the filter device 5.

[0057] When the liquid level of the floating liquid reaches the upper limit of the liquid level switch, the slurry pump starts to work and continuously pumps out the clean water in the floating liquid.

[0058] When the liquid level of the floating liquid reaches the lower limit of the liquid level switch, the slurry pump stops working.

[0059] The sediment with a specific gravity greater than that of water gathered at the bottom of the sedimentation container 1 is transported by the slurry pump 3 to the slurry barrel 8 to be made into slurry for shield construction.

[0060] The utility model has the following beneficial effects:

[0061] 1. The floating liquid of the mud can be continuously processed to increase the processing efficiency.

[0062] 2. When separating the floating liquid of mud, no manual processing is required, thus reducing labor.

[0063] 3. The mud can be recycled to the maximum extent.

[0064] It should be noted that the terms used to describe the positional relationships in the above examples and drawings are only for illustrative purposes and should not be construed as limiting this patent; the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A shield mud slurry flotation liquid processing device, characterized in that: The invention comprises a sedimentation container (1), wherein the sedimentation container (1) is provided with a slurry inlet structure, a liquid outlet (11) and a slurry outlet (12); the liquid outlet (11) is provided on one side of the sedimentation container (1) and is used to discharge the floating liquid whose liquid surface reaches the liquid outlet (11); the slurry outlet (12) is provided at a position lower than the liquid outlet (11) and is used to discharge the slurry that reaches a preset height after sedimentation; the slurry inlet structure is provided on a side of the sedimentation container (1) away from the liquid outlet (11) and is used to prevent the newly entered shield slurry from the slurry inlet structure from disturbing the floating liquid that has settled and stratified at the liquid outlet (11); the distance between the slurry inlet structure and the liquid outlet (11) reaches a preset length or more, so that the entered shield slurry has sufficient space and time to settle.

2. The shield mud flotation liquid processing device according to claim 1, characterized in that: The precipitation container (1) is a precipitation tank with an open top.

3. The shield mud flotation liquid processing device according to claim 1, characterized in that: The preset length is 3m.

4. The shield mud flotation liquid processing device according to claim 3, characterized in that: The bottom of the sedimentation container (1) is arranged to be inclined, so as to prevent newly input shield slurry from gathering on one side of the sedimentation container (1).

5. The shield mud flotation liquid processing device according to claim 3, characterized in that: The slurry inlet structure is a slurry inlet pipe (2), the outlet position of the slurry inlet pipe (2) is lower than the liquid outlet (11), and is used to prevent the newly entered shield slurry from disturbing the floating liquid layer near the liquid outlet (11).

6. The shield mud flotation liquid processing device according to claim 1, characterized in that: The bottom of the sedimentation container (1) is a collapsed structure with a cross-sectional area gradually decreasing from top to bottom.

7. A shield mud flotation liquid processing device according to claim 1 or 6, characterized in that: The slurry outlet (12) of the precipitation container (1) is arranged at the bottom of the precipitation container (1).

8. The shield mud flotation liquid processing device according to claim 1, characterized in that: The invention comprises a flotation liquid container (6), wherein the flotation liquid container (6) is provided with a liquid inlet (13), the liquid inlet (13) of the flotation liquid container (6) is connected to the liquid outlet (11) of the sedimentation container (1), the liquid outlet (11) of the sedimentation container (1) is higher than the liquid inlet (13) of the flotation liquid container (6) or is level with the liquid inlet (13) of the flotation liquid container (6), and the flotation liquid container (6) is used to recover the flotation liquid discharged from the liquid outlet (11) of the sedimentation container (1).

9. The shield mud flotation liquid processing device according to claim 8, characterized in that: The liquid outlet (11) of the sedimentation container (1) is connected to a filtering device (5), and the filtering device (5) is used to filter impurities in the floating liquid during the floating liquid recovery process.

10. The shield mud flotation liquid processing device according to claim 9, characterized in that: The filtering device (5) is configured as a mesh trough structure, the filtering device (5) is disposed in the flotation liquid container (6), and the inlet of the filtering device (5) is connected to the liquid inlet (13) of the flotation liquid container (6).

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