An apparatus for preparing bentonite slurry using slag soil.

Abstract

This invention relates to waste soil treatment equipment, specifically disclosing an apparatus for preparing bentonite slurry using waste soil. The apparatus includes a crushing module (1) for receiving shield tunneling waste soil, a stirring module (2) connected to the crushing module (1), a conveying module (6) located at one end of the stirring module (2), and a mixing and storage module (3) located at the discharge end of the conveying module (6). The mixing and storage module (3) includes a mixing and storage container (301) and a stirring device (302). A slide rail is provided on the mixing and storage container (301), and the stirring device (302) is connected to the slide rail and adapted to move horizontally along the mixing and storage container (301). This apparatus for preparing bentonite slurry using waste soil refines the shield tunneling waste soil to a particle size consistent with that of bentonite used for synchronous grouting, replacing bentonite in mortar preparation. This not only enables the reuse of shield tunneling waste soil and reduces the amount of waste soil transported, but also reduces the procurement of raw materials, improves construction efficiency, and lowers project costs.

Description

Technical Field

[0001] This invention relates to equipment for treating construction waste, and more specifically, to an apparatus for preparing bentonite slurry using construction waste. Background Technology

[0002] Tunnel boring machine (TBM) engineering is a construction method that integrates multiple processes such as excavation, soil removal, support, and grouting. It is also the preferred construction method for large and medium-sized underground transportation projects and tunnel construction. During construction, TBM excavation and tail grouting are carried out simultaneously. While excavating and removing the excavated soil, the tail grouting fills the gaps, providing timely support to the surrounding rock mass, effectively preventing rock collapse, and controlling surface subsidence. However, the handling of excavated soil and the preparation of grouting slurry during construction incur significant additional costs.

[0003] In clay strata, tunnel boring machine (TBM) excavated soil commonly contains clay minerals, which are one of the main raw materials for mortar used in synchronous grouting at the shield tail. If the TBM excavated soil could be refined and used to replace the existing bentonite in grout preparation, it would not only reduce the procurement of a large amount of bentonite but also reduce the transportation of excavated soil, significantly improving the efficiency of TBM construction and reducing project costs. However, even after recycling the TBM excavated soil using existing equipment, waste residue is still output, and the accumulation and reuse of the dewatered mud cake from the filter press incurs land and transportation costs, resulting in low utilization efficiency.

[0004] In view of this, there is a need to provide a device for preparing bentonite slurry using slag, which can improve the utilization rate of shield tunnel slag and will not generate high land occupation and transportation costs. Summary of the Invention

[0005] This invention provides an apparatus for preparing bentonite slurry using slag soil. This apparatus has a high utilization rate and low land and transportation costs.

[0006] To achieve the above objectives, the present invention provides an apparatus for preparing bentonite slurry using slag, comprising a crushing module for receiving slag from a tunnel boring machine, a stirring module connected to the crushing module, a conveying module located at one end of the stirring module, and a mixing and storage module located at the discharge end of the conveying module; wherein, the mixing and storage module includes a mixing and storage container and a stirring device, the mixing and storage container is provided with a slide rail, and the stirring device is connected to the slide rail and adapted to move horizontally along the mixing and storage container.

[0007] In a preferred embodiment of the present invention, the mixed storage container is a metal shell with an open top, and the slide rails are provided on both sides of the open end of the metal shell.

[0008] In another preferred embodiment of the present invention, the crushing module includes a feed hopper for receiving tunnel boring machine excavation, a crushing unit disposed at the lower part of the feed hopper, and a crushing module motor connected to the crushing unit. The crushing module motor is adapted to drive the crushing unit. The top and bottom of the feed hopper are open structures. The upper part of the feed hopper is a cone shape that gradually decreases from top to bottom, and the cross-sectional area of ​​the lower part of the feed hopper is equal from top to bottom.

[0009] More preferably, the inclination angle of the inclined sidewall at the top of the feed hopper is 45-60°.

[0010] More preferably, the crushing unit is a double-roll crusher, and the double-roll crusher has a pair of cylindrical rollers inside.

[0011] In another preferred embodiment of the present invention, the stirring module includes a stirring tank, a pair of stirring shafts disposed in the stirring tank, and a stirring module motor connected to the stirring shafts, wherein the stirring module motor is adapted to drive the stirring shafts.

[0012] More preferably, the crushing module includes a feeding bin, the lower end of which is connected to the mixing tank, and the lower part of the mixing tank away from the feeding bin is provided with a mixing tank outlet, and the conveying module is located at the mixing tank outlet.

[0013] As a specific structural form of the present invention, the conveying module is a conveyor slide or a conveyor belt.

[0014] As another specific structural form of the present invention, it also includes a support bracket, a pumping module, and a control module disposed at the lower part of the stirring module and connected to the stirring module. The pumping module includes a slurry pump and a slurry delivery pipe connected to the inlet and outlet of the slurry pump.

[0015] More specifically, the slurry delivery pipe at the inlet end of the slurry pump is adapted to be inserted into the mixing storage container to draw slurry from the mixing storage container.

[0016] Through the above technical solution, the apparatus for preparing bentonite slurry using slag from the present invention includes a crushing module for receiving slag from a tunnel boring machine, a stirring module connected to the crushing module, a conveying module located at one end of the stirring module, and a mixing and storage module located at the discharge end of the conveying module. The mixing and storage module includes a mixing and storage container and a stirring device. A slide rail is provided on the mixing and storage container, and the stirring device is connected to the slide rail and adapted to move horizontally along the mixing and storage container. The apparatus for preparing bentonite slurry using slag from the present invention utilizes the crushing module to crush the slag generated during the tunnel boring process, and the stirring module to further agitate and refine the crushed slag. The slurry is then conveyed into the mixing and storage module via the conveying module. Within the mixing and storage module, bentonite slurry of the required concentration and ratio can be prepared according to needs. The device for preparing bentonite slurry using slag can control the particle size of the slag particles, achieve continuous feeding and discharging, uninterrupted production, and has a high degree of homogenization of the slurry. The process is simple, easy to operate, has extremely low maintenance costs, and is stable in operation, which significantly reduces the cost of slag treatment and slurry preparation and improves construction efficiency.

[0017] Other advantages of the present invention and the technical effects of preferred embodiments will be further described in the following detailed description. Attached Figure Description

[0018] Figure 1 This is a front structural diagram of a specific embodiment of the present invention;

[0019] Figure 2 This is a front structural diagram of another specific embodiment of the present invention;

[0020] Figure 3 This is a top view of a specific embodiment of the crushing module of the present invention;

[0021] Figure 4 This is a top view of a specific embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures

[0023] 1. Crushing Module 101 Feeding Bin

[0024] 102 Crushing Unit 103 Crushing Module Motor

[0025] 2. Mixing Module 201 Mixing Tank

[0026] 202 Mixing Shaft, 203 Mixing Module Motor

[0027] 3 Hybrid Storage Module 301 Hybrid Storage Container

[0028] 302 Mixing Device 4 Pumping Module

[0029] 401 slurry pump, 402 slurry delivery pipe

[0030] 5 Support brackets 6 Conveying modules

[0031] 7 Ground tilt angle θ Detailed Implementation

[0032] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral 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 according to the specific circumstances.

[0034] See Figure 1 and Figure 2 As shown, the apparatus for preparing bentonite slurry using slag soil of the present invention includes a crushing module 1 for receiving shield tunnel slag soil, a stirring module 2 connected to the crushing module 1, a conveying module 6 located at one end of the stirring module 2, and a mixing and storage module 3 located at the discharge end of the conveying module 6.

[0035] exist Figure 1 and Figure 2 In one embodiment of the present invention, the crushing module 1 is connected to the mixing module 2 and positioned above one end of the mixing module 2. This allows the crushed slag from the crushing module 1 to be directly discharged into the mixing module 2, whereby the mixing module 2 further mixes and refines the crushed slag, providing finely ground slag that meets the particle size requirements for the next process. The conveying module 6 is located at the end of the mixing module 2 furthest from the crushing module 1. The conveying module 6 transports the refined slag from the mixing module 2 into the mixing and storage module 3 for the final proportioning process.

[0036] like Figure 4 As shown, the mixing storage module 3 includes a mixing storage container 301 and a stirring device 302. The mixing storage container 301 is provided with a slide rail, and the stirring device 302 is connected to the slide rail and is adapted to move along the mixing storage container 301.

[0037] In one specific embodiment of the present invention, the mixed storage container 301 is a metal shell with an open top, and the slide rails are provided on both sides of the open end of the metal shell.

[0038] In one embodiment of the hybrid storage container 301, the hybrid storage container 301 is a box structure with an open top, welded from steel plates, with external dimensions of 6000mm × 2000mm × 1500mm (length × width × height). The steel plates used for welding can be Q235-A steel plates with a thickness of 25mm-40mm, preferably 30mm. The edge of the upper opening of the hybrid storage container 301 is flush with the ground 7, which can reduce the floor space occupied, facilitate construction, and ensure safe use.

[0039] In one embodiment of the stirring device 302, the stirring device 302 is a rotary stirrer with a stirring diameter of 1000mm and a stirring depth of 1450mm. Generally, three rotary stirrers are provided. These rotary stirrers are connected to the upper edge of the mixing and storage container 301 via slide rails and can slide along the upper edge of the mixing and storage container 301, allowing them to be moved to any position for stirring. The number of rotary stirrers can also be increased or decreased according to actual stirring needs, making operation convenient.

[0040] like Figure 4 As shown, in another specific embodiment of the present invention, the crushing module 1 includes a feeding bin 101 for receiving tunnel boring machine excavation, a crushing unit 102 disposed at the lower part of the feeding bin 101, and a crushing module motor 103 connected to the crushing unit 102. The crushing module motor 103 is adapted to drive the crushing unit 102. The top and bottom of the feeding bin 101 are open structures. The upper part of the feeding bin 101 is a cone shape that gradually decreases from top to bottom. The cross-sectional area of ​​the lower part of the feeding bin 101 is equal from top to bottom.

[0041] Specifically, the inclination angle θ of the inclined sidewall at the top of the feed hopper 101 is 45-60°.

[0042] More specifically, the crushing unit 102 is a double-roll crusher, and the double-roll crusher has a pair of cylindrical rollers inside.

[0043] In one embodiment of the feed hopper 101, the upper part of the hopper 101 is a tapered shape that gradually decreases in size from top to bottom, while the cross-sectional area of ​​the lower part is equal from top to bottom, which helps to prevent the slag from overflowing. Here, the hopper 101 is welded from Q235-A steel plates with a thickness of 15-25mm. Both the upper and lower ends of the hopper 101 are open structures. The cross-sectional dimensions of the top opening of the hopper 101 are 1000mm × 3000mm, and the height of the hopper 101 is 1500mm. Here, the cross-sectional shape of the hopper 101 is rectangular, but the cross-sectional shape of the hopper 101 is not limited to rectangles; it can also be square, circular, or other shapes, as long as the upper part of the hopper 101 is larger than the lower part, it falls within the protection scope of this invention.

[0044] like Figure 3 As shown, in one embodiment of the crushing unit 102, the crushing unit 102 is a double roll crusher, the model of which is zpG400×250. The double roll crusher is equipped with a pair of cylindrical rollers inside. The diameter of the cylindrical rollers in this model of double roll crusher is 400mm and the length is 250mm, which can meet the normal crushing requirements.

[0045] Meanwhile, in one embodiment of the crushing module motor 103, the power of the crushing module motor 103 is 10-12 kW.

[0046] like Figure 4 As shown, in another specific embodiment of the present invention, the stirring module 2 includes a stirring tank 201, a pair of stirring shafts 202 disposed in the stirring tank 201, and a stirring module motor 203 connected to the stirring shafts 202. The stirring module motor 203 is adapted to drive the stirring shafts 202.

[0047] More specifically, the crushing module 1 includes a feeding bin 101, the lower end of which is connected to the mixing tank 201. The mixing tank 201 has a mixing tank outlet at the lower part of the end away from the feeding bin 101, and the conveying module 6 is located at the mixing tank outlet.

[0048] In one specific embodiment of the mixing tank 201, the dimensions of the mixing tank 201 are 3000mm × 1000mm × 1000mm (length × width × height). The mixing tank 201 is welded from Q235-A steel plate with a thickness of 25-40mm, preferably 30mm. The upper part of the mixing tank 201 has an open structure. The upper edge of one end of the mixing tank 201 is connected to the lower edge of the feed hopper 101, which can be connected by fasteners such as bolts or screws, or by welding. A discharge port is also provided at the lower end of the mixing tank 201 away from the feed hopper 101. Depending on the dimensions of the mixing tank 201, the size of this discharge port can be 800mm × 400mm. A sealing cover is also provided at the discharge port. During the mixing and refining process, the sealing cover can be closed, thereby prolonging the time the slag is in the mixing tank 201, resulting in more uniform mixing. It should be noted here that the size of the discharge port of the mixing tank must be smaller than the width of the mixing storage container 301.

[0049] In one specific embodiment of the stirring shaft 202, the stirring shaft 202 is arranged along the length direction of the stirring tank 201 and is arranged in pairs. The rotation diameter of a single stirring shaft 202 is 400mm, the minimum distance between two stirring shafts 202 can be set to 100mm, and the rotation directions of the two stirring shafts 202 are opposite.

[0050] In one specific embodiment of the stirring module motor 203, the stirring module motor 203 adopts a motor with a power of 5-6Kw.

[0051] In a preferred embodiment of the present invention, the conveying module 6 is a conveying slide or a conveyor belt. The conveying module 6 is located at the outlet of the mixing tank, and can directly convey the refined slag from the mixing tank 201 into the mixing and storage module 3. The effective conveying area of ​​the conveying module 6 is 800mm × 400mm. When the conveying module 6 adopts a conveying slide structure, the conveying slide can be inclined downwards from one end of the mixing tank 201 towards the other end of the mixing and storage module 3, with an inclination angle generally of 45°. When the conveying module 6 adopts a conveyor belt, the conveyor belt can also be inclined downwards, with an inclination angle of 20-30°.

[0052] As another preferred embodiment of the present invention, the apparatus for preparing bentonite slurry using slag soil further includes a support bracket 5 disposed at the lower part of the mixing module 2 and connected to the mixing module 2, a pumping module 4, and a control module. The pumping module 4 includes a slurry pump 401 and a slurry delivery pipe 402 connected to the inlet and outlet of the slurry pump 401.

[0053] Here, the control module is electrically connected to the crushing module 1, the stirring module 2, the mixing and storage module 3, the pumping module 4, and the conveying module 6, and controls the normal operation of each module respectively.

[0054] More preferably, the slurry delivery pipe 402 at the inlet end of the slurry pump 401 is adapted to be inserted into the mixing storage container 301 to be able to draw the slurry in the mixing storage container 301.

[0055] from Figure 1 and Figure 2 As can be seen, the support bracket 5 is fixedly connected to the lower end of the mixing module 2, which can be fixed by fasteners such as bolts or screws, or by direct welding. The other end of the support bracket 5 is fixedly connected to the ground 7. The support bracket 5 is welded from Q235-A steel, or it can be connected by fasteners such as bolts or screws, and its volume is 3m³. 3 .

[0056] In a specific embodiment of the slurry pump 401, the slurry pump 401 should be selected with a head of 15m and a flow rate of 15m³ / h. 3 The slurry pump can be a standard pump, or a mobile pumping device with suction function can be selected. The inlet and outlet of the slurry pump 401 are both connected to slurry delivery pipes 402. One end of the slurry delivery pipe 402 is placed at the bottom of the mixing and storage container 301, and the other end can be connected to the tail slurry mixing system to provide grouting slurry for the tail slurry mixing system.

[0057] It is important to note that the head of the slurry pump 401 must be matched with the depth of the mixing and storage container 301, and the diameter of the slurry delivery pipe 402 must be matched with the flow rate of the slurry pump 401.

[0058] The working principle of the device for preparing bentonite slurry using slag soil of the present invention is as follows:

[0059] When the excavated soil generated during the tunnel boring machine (TBM) enters the feed hopper 101, the crushing unit 102 continuously crushes it. The crushed soil then enters the mixing tank 201, where paired mixing shafts 202 further mix and refine the soil, gradually moving it to the discharge port of the mixing tank. The conveying module 6 transports the refined soil to the mixing storage container 301, and the concentration can be adjusted as needed. The mixing device 302 not only improves the homogenization of the slurry but also prevents sedimentation. The prepared slurry is pumped out through the pumping module 4 for use in preparing the tail grouting slurry.

[0060] Here, the support bracket 5 can ensure the working stability of the crushing module 1 and the mixing module 2; during the entire operation of the device, the structure of the feed hopper 101, which is larger at the top and smaller at the bottom, can ensure that it will not overflow when there is a large amount of slag.

[0061] As can be seen from the above description, the apparatus for preparing bentonite slurry using slag from the present invention includes a crushing module 1 for receiving slag from a tunnel boring machine, a stirring module 2 connected to the crushing module 1, a conveying module 6 located at one end of the stirring module 2, and a mixing and storage module 3 located at the discharge end of the conveying module 6. The mixing and storage module 3 includes a mixing and storage container 301 and a stirring device 302. The mixing and storage container 301 is provided with a slide rail, and the stirring device 302 is connected to the slide rail and adapted to move horizontally along the mixing and storage container 301. The apparatus for preparing bentonite slurry using slag from the present invention utilizes the crushing module 1 to crush the slag generated during the tunnel boring process, and the stirring module 2 to further stir and refine the slag after crushing by the crushing module 1. The slurry is then conveyed into the mixing and storage module 3 via the conveying module 6. The mixing and storage module 3 can be configured with bentonite slurry of the required concentration and ratio according to needs. The device for preparing bentonite slurry using slag can control the particle size of the slag particles, achieve continuous feeding and discharging, uninterrupted production, and has a high degree of homogenization of the slurry. The process is simple, easy to operate, has extremely low maintenance costs, and is stable in operation, which significantly reduces the cost of slag treatment and slurry preparation and improves construction efficiency.

[0062] The control software of the control module in this invention is existing technology.

[0063] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0064] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0065] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A device for preparing bentonite slurry using slag, characterized by, It includes a crushing module (1) for receiving tunnel boring machine excavation, a mixing module (2) connected to the crushing module (1), a conveying module (6) located at one end of the mixing module (2), and a mixing and storage module (3) located at the discharge end of the conveying module (6); wherein, The hybrid storage module (3) includes a hybrid storage container (301) and a stirring device (302). The hybrid storage container (301) is provided with a slide rail, and the stirring device (302) is connected to the slide rail and is adapted to move along the hybrid storage container (301). The mixing module (2) is adapted to mix and refine the crushed slag. The mixing module (2) includes a mixing tank (201), a pair of mixing shafts (202) disposed in the mixing tank (201), and a mixing module motor (203) connected to the mixing shafts (202). The mixing module motor (203) is adapted to drive the mixing shafts (202). The pair of mixing shafts (202) are both arranged along the length direction of the mixing tank (201), and the rotation of each of the pair of mixing shafts (202) is... The directions of rotation are opposite, and the minimum distance between the pair of stirring shafts (202) is less than the rotation radius of any one of the stirring shafts (202); the pair of stirring shafts (202) are on the same horizontal plane, and the pair of stirring shafts (202) further stir and refine the slag and gradually move the slag to the discharge port of the stirring tank (201), wherein the upper part of one end of the stirring tank (201) along the length direction is connected to the crushing module (1), and the lower part of the other end is connected to the conveying module (6).

2. The device for preparing bentonite slurry using slag according to claim 1, wherein The hybrid storage container (301) is a metal shell with an opening at the top, and the slide rails are located on both sides of the opening end of the metal shell.

3. The apparatus for preparing bentonite slurry using slag soil according to claim 1, characterized in that, The crushing module (1) includes a feed bin (101) for receiving shield tunnel excavation, a crushing unit (102) located at the bottom of the feed bin (101) and a crushing module motor (103) connected to the crushing unit (102). The crushing module motor (103) is adapted to drive the crushing unit (102). The top and bottom of the feed hopper (101) are open structures. The upper part of the feed hopper (101) is a cone shape that gradually decreases from top to bottom. The cross-sectional area of ​​the lower part of the feed hopper (101) is equal from top to bottom.

4. The apparatus for preparing bentonite slurry using slag soil according to claim 3, characterized in that, The inclination angle (θ) of the inclined sidewall at the top of the feed hopper (101) is 45-60°.

5. The apparatus for preparing bentonite slurry using slag soil according to claim 3, characterized in that, The crushing unit (102) is a double roll crusher, and the double roll crusher has a pair of cylindrical rollers inside.

6. The apparatus for preparing bentonite slurry using slag soil according to claim 1, characterized in that, The crushing module (1) includes a feeding bin (101), the lower end of which is connected to the mixing tank (201). The mixing tank (201) has a mixing tank outlet at the lower part of the end away from the feeding bin (101). The conveying module (6) is located at the mixing tank outlet.

7. The apparatus for preparing bentonite slurry using slag soil according to claim 1, characterized in that, The conveying module (6) is a conveyor slide or conveyor belt.

8. The apparatus for preparing bentonite slurry using slag soil according to any one of claims 1 to 7, characterized in that, It also includes a support bracket (5) located at the lower part of the stirring module (2) and connected to the stirring module (2), a pumping module (4) and a control module. The pumping module (4) includes a slurry pump (401) and a slurry delivery pipe (402) connected to the inlet and outlet of the slurry pump (401).

9. The apparatus for preparing bentonite slurry using slag soil according to claim 8, characterized in that, The slurry delivery pipe (402) at the inlet end of the slurry pump (401) is adapted to be inserted into the mixing storage container (301) to draw slurry from the mixing storage container (301).

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