A device and method for treating the mud circulation in a foundation pit

Abstract

The present invention discloses a foundation pit mud circulation treatment device and a treatment method. In the present invention, there is a sedimentation tank and a plurality of sedimentation tanks located behind the sedimentation tank. A conveying assembly is arranged at the bottom of the sedimentation tank, and a discharge port for the conveying assembly to convey sediment is opened on one side of the sedimentation tank. By setting a plurality of sedimentation tanks, after the muddy water in the sedimentation tanks is detected by the turbidity sensing module and the turbidity detection mechanism, the muddy water with different turbidities is returned to the drainage area position corresponding to the turbidity parameter. The liquid above the drainage area is conveyed to the bottom of the first sedimentation tank through a conveying pipe, and the liquid above the first sedimentation tank is conveyed to the bottom of the adjacent downstream sedimentation tank through a conveying pipe for continuous sedimentation. In this way, discharging the muddy water with different turbidities to the drainage area position corresponding to the turbidity parameter can prevent the muddy water with a higher turbidity from being discharged into the area with less sludge turbidity, causing the water body in the area with less turbidity to be stirred and turbid, resulting in a longer time required for re-sedimentation.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit mud circulation, and specifically to a foundation pit mud circulation treatment device and a treatment method therefor. Background Art

[0002] Land saving, water saving and emission reduction are the green environmental protection requirements concerned in the civil engineering construction field. At present, during the construction of pile foundations, foundation pit enclosures and underground structures, a large amount of mud is discharged, and a large amount of drill cuttings are carried in the discharged mud. If it is directly introduced into the pit for reuse, it not only cannot meet the requirements of protecting the wall, but may even damage the pit wall, directly affecting its service life. Therefore, the discharged mud needs to be appropriately treated until it meets the wall protection requirements before it can be pumped back into the pit (hole) for use again. A mud separator is needed to separate and discharge the soil residues in the mud and achieve the purpose of reusing the mud and water. When circulating and treating the mud, it is necessary to filter the stones in the mud and dilute the mud lumps in the mud at the same time.

[0003] In actual projects, for example, in the construction of a sports center project, the amount of foundation pit mud to be discharged is extremely large, and the discharged foundation pit mud needs to be efficiently treated and a large amount of liquid is discharged to the outside. Traditional mud circulation treatment equipment generally consists of a desander, a desilter, a mud cleaner, a funnel, a pump, a tank body, a chemical dosing device, a stirrer, etc. The mud is treated by solid control equipment such as a vibrating screen, a desander, a desilter, a centrifuge, etc. If chemical dosing is required, an additional chemical dosing device is added for proportioning.

[0004] In the actual use process, the mud and water often need a long time to precipitate. During this process, if there is still mud in the subsequent water, the water will be directly poured into the sedimentation tank, disturbing the original sedimentation situation of the mud and water in the sedimentation tank, making the liquid in the sedimentation tank become turbid and lengthening the sedimentation time of the mud and water.

[0005] Facing the above situation, how to effectively solve the problem of the fusion of the subsequent turbid water body and the water body in the sedimentation tank has become a problem to be solved. Summary of the Invention

[0006] To solve the above technical problems, the present invention provides a foundation pit mud circulation treatment device and a treatment method therefor, which realize that the mud that has not been completely precipitated in the sedimentation tank is re-discharged into the sedimentation tank, and mud with different turbidities can also be discharged into the corresponding sludge sedimentation areas in the sedimentation tank, thus preventing the mixing of mud with different turbidities, resulting in the turbidity of the mud with a lower turbidity becoming turbid again and increasing the sedimentation duration.

[0007] To achieve the above object, the present invention provides the following technical solution: A foundation pit mud circulation treatment device, including a sedimentation tank, and a plurality of sedimentation tanks located behind the sedimentation tank. The bottom of the sedimentation tank is provided with a conveying component inclined upward. An outlet for the conveying component to convey sediment is opened on one side of the sedimentation tank. The conveying component includes a protective shell arranged at the outlet position, a driving motor fixedly connected to the protective shell, and a spiral conveying blade rotatably arranged in the protective shell. The spiral conveying blade penetrates the outlet and extends into the bottom of the sedimentation tank.

[0008] A partition is fixedly arranged inside the sedimentation tank. A sedimentation area is formed between the lower end of the partition and the bottom plate of the sedimentation tank. One side of the partition forms a feeding area, and the other side forms a liquid discharging area. Among them, the feeding area is located above the outlet.

[0009] A shunt component communicated with the liquid discharging area is arranged on one side of the sedimentation tank. The shunt component includes a main flow pipe, a plurality of shunt pipes communicated with the main flow pipe, and a plurality of turbidity sensing probes vertically distributed on the inner wall surface of the liquid discharging area of the sedimentation tank.

[0010] Among them, a turbidity sensing probe is arranged between the communication openings of two adjacent shunt pipes and the sedimentation tank, and a turbidity sensing probe is also arranged above the communication opening of the highest-position shunt pipe and the sedimentation tank.

[0011] A one-way conveying pump and a turbidity detection mechanism are arranged at the lower end of the main flow pipe. Each shunt pipe is independently provided with a sub-solenoid valve.

[0012] A turbidity sensing module is arranged at the bottom of each sedimentation tank. A conveying pipe is connected between the liquid discharging area of the sedimentation tank and the sedimentation tank at the first position, and between adjacent sedimentation tanks.

[0013] A return liquid pipe independently connected to the main flow pipe is connected to the bottom of each sedimentation tank. Each return liquid pipe is provided with a return liquid solenoid valve.

[0014] As a preferred technical solution of the present invention, the output end of the driving motor is connected to one end of the spiral conveying blade. A blanking port for sediment discharging is opened on one side end of the protective shell.

[0015] As a preferred technical solution of the present invention, the connection positions of all the return liquid pipes and the main flow pipe are located below the one-way conveying pump and the turbidity detection mechanism.

[0016] The connection positions of all the sub-solenoid valves and the main flow pipe are located above the one-way conveying pump and the turbidity detection mechanism.

[0017] As a preferred technical solution of the present invention, for the conveying pipe between the liquid discharging area of the sedimentation tank and the sedimentation tank at the first position, one end of the conveying pipe is inserted into the upper area of the liquid discharging area, and the other end of the conveying pipe is inserted into the bottom area of the sedimentation tank at the first position;

[0018] The conveying pipe between adjacent sedimentation tanks, one end of the conveying pipe is inserted into the upper region of the upstream sedimentation tank, and the other end of the conveying pipe is inserted into the bottom region of the downstream sedimentation tank;

[0019] The conveying pipe is equipped with a pump body for conveying the sediment - mixed liquid.

[0020] As a preferred technical solution of the present invention, the width dimension of the feed area of the sedimentation tank is larger than the width dimension of the liquid discharge area.

[0021] As a preferred technical solution of the present invention, the turbidity detection mechanism arranged on the main flow pipe is located on the downstream side of the one - way conveying pump.

[0022] The present invention provides a foundation pit mud circulation treatment device, including the following steps:

[0023] S1. The mud is discharged from the feed area into the sedimentation tank. After sedimentation, the sediment accumulates in the sedimentation area. The conveying component is started to discharge the sediment from the discharge port out of the sedimentation tank. The separated liquid enters the liquid discharge area. The upper liquid in the liquid discharge area is conveyed through the conveying pipe to the bottom of the first sedimentation tank, and the upper liquid in the first sedimentation tank is conveyed through the conveying pipe to the bottom of the adjacent downstream sedimentation tank.

[0024] S2. Multiple turbidity sensing probes in the sedimentation tank start to work. Let the turbidity information monitored by the multiple turbidity sensing probes from top to bottom be [W1, W2, W3,..., W n .

[0025] S3. The turbidity sensing modules in all sedimentation tanks start to work. The turbidity sensing module in any one sedimentation tank detects that the turbidity of the liquid in the sedimentation tank is Wx.

[0026] S3.1. If Wx ≤ W1, the return pipe connected to the bottom of the current sedimentation tank remains closed, and there is no return liquid action.

[0027] S3.2. If Wx > W1, the return solenoid valve on the return pipe connected to the bottom of the current sedimentation tank is opened, and at the same time, the one - way conveying pump is started. All branch solenoid valves are first opened. The turbidity detection mechanism detects the turbidity of the returned liquid, denoted as Wy, and then closes all branch solenoid valves.

[0028] Judge the parameter range relationship between Wy and (W1, W2], (W2, W3], (W3, W4],..., (W n-1 W n , and open the branch solenoid valves of the corresponding position shunt pipes, so that the turbid liquid flows back to the liquid discharge area position corresponding to the turbidity parameter.

[0029] Among them, if Wy > W n , the branch solenoid valve of the lowest - position shunt pipe is opened, and the turbid liquid flows back to the bottom - most position of the liquid discharge area.

[0030] The present invention provides a device for treating foundation pit mud circulation, which has the following beneficial effects:

[0031] In the present invention, by arranging a plurality of sedimentation tanks, after the muddy water in the sedimentation tanks is detected by the turbidity sensing module and the turbidity detection mechanism, the muddy water with different turbidities is returned to the drainage area positions corresponding to the turbidity parameters. The liquid above the drainage area is transported to the bottom of the first sedimentation tank through the conveying pipe, and the liquid above the first sedimentation tank is transported to the bottom of the adjacent downstream sedimentation tank through the conveying pipe for continuous sedimentation. In this way, discharging the muddy water with different turbidities into the drainage area positions corresponding to the turbidity parameters can prevent the muddy water with higher turbidity from being discharged into the area with less sludge turbidity, causing the water body in the area with less turbidity to be stirred and turbid, resulting in a longer time required for re-sedimentation. This ensures the efficient sedimentation of sediment in each turbidity area of the drainage area and also ensures the clarity and discharge efficiency of the liquid discharged at the top of the drainage area.

[0032] The present invention realizes the efficient and continuous discharge of foundation pit mud, effectively conducts sedimentation, and at the same time, when the discharged liquid does not meet the standard, it minimizes the influence of the reflux turbid liquid on the sedimentation and discharge efficiency of the initial first sedimentation tank to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0034] Figure 2 It is a schematic diagram of the overall sectional structure of the present invention.

[0035] Figure 3 It is a schematic diagram of the overall structure of the present invention.

[0036] In the figure: 1, sedimentation tank; 101, partition board; 102, sedimentation area; 103, feeding area; 104, drainage area; 105, discharge port; 2, sedimentation tank; 3, return liquid pipe; 4, turbidity sensing module; 5, return liquid solenoid valve; 6, shunt assembly, 601, main flow pipe, 602, shunt pipe, 603, branch solenoid valve, 604, turbidity sensing probe, 605, unidirectional conveying pump, 606, turbidity detection mechanism; 7, conveying assembly, 701, protective shell, 702, blanking port, 703, driving motor, 704, spiral conveying blade; 8, conveying pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0038] Embodiment 1. The present invention designs a device for treating foundation pit mud circulation, which mainly includes the following:

[0039] Combined with Figure 1, Figure 2 , a sedimentation tank 1, and a plurality of sedimentation tanks 2 located after the sedimentation tank 1. A conveying assembly 7 is disposed at the bottom of the sedimentation tank 1 and is inclined upward. An outlet 105 for the conveying assembly 7 to convey sediment is provided on one side of the sedimentation tank 1. The conveying assembly 7 includes a protective shell 701 fixedly disposed at the position of the outlet 105. One end of the protective shell 701 is fixedly connected to a driving motor 703. A spiral conveying blade 704 is rotatably connected inside the protective shell 701, and the output shaft of the driving motor 703 is fixedly connected to one end of the spiral conveying blade 704. The spiral conveying blade 704 penetrates through the outlet 105 and extends into the bottom of the sedimentation tank 1. A blanking port 702 for sediment to fall is provided on one side end of the protective shell 701.

[0040] Combined with Figure 3 , a partition 101 is fixedly disposed inside the sedimentation tank 1. A sedimentation area 102 is formed between the lower side end of the partition 101 and the bottom plate of the sedimentation tank 1. A feeding area 103 is formed between the partition 101 and one side of the sedimentation tank 1. A liquid discharge area 104 is formed between the partition 101 and the other side of the sedimentation tank 1. The width dimension of the feeding area 103 of the sedimentation tank 1 is greater than the width dimension of the liquid discharge area 104. Among them, the feeding area 103 is located above the outlet 105.

[0041] Combined with Figure 2 , Figure 3 , a flow splitting assembly 6 communicating with the liquid discharge area 104 is provided on one side of the sedimentation tank 1. The flow splitting assembly 6 includes a main flow pipe 601. A plurality of flow splitting pipes 602 are communicated with the surface of the main flow pipe 601. A plurality of turbidity sensing probes 604 are vertically distributed on the inner wall surface of the liquid discharge area 104 in the sedimentation tank 1. Among them, a turbidity sensing probe 604 is disposed between the communication openings of two adjacent flow splitting pipes 602 and the sedimentation tank 1, and a turbidity sensing probe 604 is also disposed above the communication opening between the highest-position flow splitting pipe 602 and the sedimentation tank 1. A one-way conveying pump 605 and a turbidity detection mechanism 606 are provided at the lower side end of the main flow pipe 601. Each flow splitting pipe 602 is independently provided with a sub-electromagnetic valve 603. A return liquid pipe 3 independently connected to the main flow pipe 601 is connected to the bottom of each sedimentation tank 2. Each return liquid pipe 3 is provided with a return liquid electromagnetic valve 5. The connection positions of all the return liquid pipes 3 and the main flow pipe 601 are located below the one-way conveying pump 605 and the turbidity detection mechanism 606. The connection positions of all the sub-electromagnetic valves 603 and the main flow pipe 601 are located above the one-way conveying pump 605 and the turbidity detection mechanism 606. The turbidity detection mechanism 606 disposed on the main flow pipe 601 is located on the downstream side of the one-way conveying pump 605. The turbidity detection mechanism 606 is disposed on the downstream side of the one-way conveying pump 605 because when the muddy water in the plurality of sedimentation tanks 2 flows into the return liquid pipe 3, before passing through the one-way conveying pump 605, the muddy water is not completely mixed. After being stirred and mixed by the one-way conveying pump 605, the turbidity detection mechanism 606 can detect the turbidity of the muddy water in the main flow pipe 601 more accurately.

[0042] Combined with Figure 2 and Figure 3 , a turbidity sensing module 4 is configured at the bottom of each sedimentation tank 2. A delivery pipe 8 is connected between the liquid discharge area 104 of the sedimentation tank 1 and the sedimentation tank 2 at the first position, and between adjacent sedimentation tanks 2. For the delivery pipe 8 between the liquid discharge area 104 of the sedimentation tank 1 and the sedimentation tank 2 at the first position, one end of the delivery pipe 8 is inserted into the upper area of the liquid discharge area 104, and the other end of the delivery pipe 8 is inserted into the bottom area of the sedimentation tank 2 at the first position. For the delivery pipe 8 between adjacent sedimentation tanks 2, one end of the delivery pipe 8 is inserted into the upper area of the upstream sedimentation tank 2, and the other end of the delivery pipe 8 is inserted into the bottom area of the downstream sedimentation tank 2. The delivery pipe 8 is configured with a pump body for delivering the sediment mixed liquid.

[0043] Embodiment 2: The present invention designs a method for treating foundation pit slurry by using a foundation pit slurry circulation treatment device. The specific working principle is as follows:

[0044] First, the slurry is discharged from the feed area 103 into the sedimentation tank 1. After sedimentation, the sediment accumulates in the sedimentation area 102. The conveying component 7 is started to discharge the sediment from the discharge port 105 out of the sedimentation tank 1. The separated liquid enters the liquid discharge area 104. The upper liquid in the liquid discharge area 104 is conveyed through the delivery pipe 8 to the bottom of the sedimentation tank 2 at the first position, and the upper liquid in the first sedimentation tank 2 is conveyed through the delivery pipe 8 to the bottom of the adjacent sedimentation tank 2 at the downstream position.

[0045] Then, multiple turbidity sensing probes 604 in the sedimentation tank 1 start to work. Let the turbidity information sequentially monitored by the multiple turbidity sensing probes 604 from top to bottom be [W1, W2, W3,..., W n . The turbidity sensing modules 4 in all sedimentation tanks 2 start to work. The turbidity sensing module 4 in any one sedimentation tank 2 detects the liquid turbidity in the sedimentation tank 2 as Wx.

[0046] If Wx ≤ W1, the return pipe 3 connected to the bottom of the current sedimentation tank 2 remains closed, and there is no return liquid action.

[0047] If Wx > W1, the return solenoid valve 5 on the return pipe 3 connected to the bottom of the current sedimentation tank 2 is opened, and at the same time, the one-way delivery pump 605 is started. All sub-solenoid valves 603 are first opened. The turbidity detection mechanism 606 detects the turbidity of the returned liquid, denoted as Wy, and then closes all sub-solenoid valves 603.

[0048] Judge the parameter range relationship between Wy and (W1, W2], (W2, W3], (W3, W4],..., (W n-1 , W n . Open the sub-solenoid valve 603 of the corresponding position shunt pipe 602, and the turbid liquid returns to the liquid discharge area position corresponding to the turbidity parameter.

[0049] Wherein, if Wy > W n , the solenoid valve 603 of the lowest-position shunt pipe 602 is opened, and the turbid liquid flows back to the bottommost position of the liquid discharge area.

[0050] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for treating foundation pit slurry circulation, and the realization of this treatment method relies on a foundation pit slurry circulation treatment device. The treatment device includes a sedimentation tank (1) and a plurality of sedimentation tanks (2) located after the sedimentation tank (1). The bottom of the sedimentation tank (1) is provided with a conveying component (7) inclined upward. An outlet (105) for the conveying component (7) to convey sediment is opened on one side of the sedimentation tank (1). The conveying component (7) includes a protective shell (701) arranged at the position of the outlet (105), a driving motor (703) fixedly connected to the protective shell (701), and a spiral conveying blade (704) rotatably arranged in the protective shell (701). The spiral conveying blade (704) penetrates through the outlet (105) and extends into the bottom of the sedimentation tank (1). It is characterized in that: A partition (101) is fixedly arranged inside the sedimentation tank (1). A sedimentation area (102) is formed between the lower end of the partition (101) and the bottom plate of the sedimentation tank (1). One side of the partition (101) forms a feeding area (103), and the other side forms a liquid discharging area (104). Among them, the feeding area (103) is located above the outlet (105); A shunt component (6) communicated with the liquid discharging area (104) is arranged on one side of the sedimentation tank (1). The shunt component (6) includes a main flow pipe (601), a plurality of shunt pipes (602) communicated with the main flow pipe (601), and a plurality of turbidity sensing probes (604) vertically distributed on the inner wall surface of the liquid discharging area (104) of the sedimentation tank (1); Among them, a turbidity sensing probe (604) is arranged between the communication openings of two adjacent shunt pipes (602) and the sedimentation tank (1), and a turbidity sensing probe (604) is also arranged above the communication opening of the highest-position shunt pipe (602) and the sedimentation tank (1); A one-way delivery pump (605) and a turbidity detection mechanism (606) are arranged at the lower end of the main flow pipe (601). Each shunt pipe (602) is independently configured with a branch solenoid valve (603); A turbidity sensing module (4) is arranged at the bottom of each sedimentation tank (2). A conveying pipe (8) is connected between the liquid discharging area (104) of the sedimentation tank (1) and the bottom of the first-position sedimentation tank (2) and between adjacent sedimentation tanks (2); A return liquid pipe (3) independently connected to the main flow pipe (601) is connected to the bottom of each sedimentation tank (2). Each return liquid pipe (3) is configured with a return liquid solenoid valve (5); The method for treating foundation pit slurry circulation is as follows: S1. The slurry is discharged into the sedimentation tank (1) from the feeding area (103). After sedimentation, the sediment accumulates in the sedimentation area (102). The conveying component (7) is started to discharge the sediment from the outlet (105) out of the sedimentation tank (1). The separated liquid enters the liquid discharging area (104). The upper liquid in the liquid discharging area (104) is conveyed to the bottom of the first-position sedimentation tank (2) through the conveying pipe (8), and the upper liquid in the first sedimentation tank (2) is conveyed to the bottom of the adjacent downstream sedimentation tank (2) through the conveying pipe (8); S2. Multiple turbidity sensing probes (604) in the sedimentation tank (1) start to work. Let the turbidity information successively monitored by the multiple turbidity sensing probes (604) from top to bottom be [W1, W2, W3,..., W n ; S3. The turbidity sensing modules (4) in all sedimentation tanks (2) start to work, and the turbidity sensing module (4) in any one sedimentation tank (2) detects that the turbidity of the liquid in the sedimentation tank (2) is Wx; S3.

1. If Wx ≤ W1, the return pipe (3) connected to the bottom of the current sedimentation tank (2) remains closed and there is no return liquid action; S3.

2. If Wx > W1, the return liquid solenoid valve (5) on the return pipe (3) connected to the bottom of the current sedimentation tank (2) is opened, and at the same time, the one-way transfer pump (605) is started. All branch solenoid valves (603) are first opened. The turbidity detection mechanism (606) detects the turbidity of the returned liquid, denoted as Wy, and then all branch solenoid valves (603) are closed; Determine the parameter range relationship between Wy and (W1, W2], (W2, W3], (W3, W4],..., (W n-1 , W n , open the solenoid valve (603) of the shunt pipe (602) at the corresponding position, and the turbid liquid flows back to the drainage area position corresponding to the turbidity parameter; Wherein, if Wy > W n , the sub-solenoid valve (603) of the lowest-position shunt pipe (602) is opened, and the turbid liquid flows back to the bottommost position of the liquid discharge area.

2. A method for treating the circulating foundation pit mud according to claim 1, characterized in that: The output end of the driving motor (703) is connected to one end of the spiral conveying blade (704), and a material dropping port (702) for discharging sediment is opened at one side end of the protective shell (701).

3. A method for treating the circulating foundation pit mud according to claim 1, characterized in that: The connection positions of all return pipes (3) and the main pipe (601) are all located below the one-way transfer pump (605) and the turbidity detection mechanism (606); The connection positions of all branch solenoid valves (603) and the main pipe (601) are all located above the one-way transfer pump (605) and the turbidity detection mechanism (606).

4. A method for treating the circulating foundation pit mud according to claim 1, characterized in that: For the conveying pipe (8) between the liquid discharge area (104) of the sedimentation tank (1) and the sedimentation tank (2) at the first position, one end of the conveying pipe (8) is inserted into the upper area of the liquid discharge area (104), and the other end of the conveying pipe (8) is inserted into the bottom area of the sedimentation tank (2) at the first position; For the conveying pipe (8) between adjacent sedimentation tanks (2), one end of the conveying pipe (8) is inserted into the upper area of the upstream sedimentation tank (2), and the other end of the conveying pipe (8) is inserted into the bottom area of the downstream sedimentation tank (2); The conveying pipe (8) is configured with a pump body for conveying the sediment - mixed liquid.

5. A method for treating the circulating foundation pit mud according to claim 1, characterized in that: The width dimension of the feed area (103) of the sedimentation tank (1) is larger than the width dimension of the liquid discharge area (104).

6. A method for treating the circulating foundation pit mud according to claim 1, characterized in that: The turbidity detection mechanism (606) configured on the main pipe (601) is located on the downstream side of the one - way transfer pump (605).

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