Foundation pit mud circulating treatment device and treatment method

Abstract

The invention discloses a circulating treatment device and method for foundation pit mud. The circulating treatment device comprises 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 discharging opening used for conveying mud and sand by the conveying assembly is formed in one side of the sedimentation tank. After the muddy water in the sedimentation tank is detected by the turbidity sensing module and the turbidity detection mechanism, the muddy water with different turbidity flows back to the position of the liquid discharge area corresponding to the turbidity parameter, and the liquid at the upper part of the liquid discharge area is conveyed to the bottom of the sedimentation tank at the first position through the conveying pipe; liquid at the upper part of the first sedimentation tank is conveyed to the bottom of the downstream adjacent sedimentation tank through the conveying pipe and is continuously settled, so that muddy water with different turbidity is discharged into the position of the liquid discharging area with corresponding turbidity parameters, the muddy water with relatively high turbidity can be prevented from being discharged into an area with relatively low sludge turbidity, and a water body in the area with relatively low turbidity is prevented from being stirred to become turbid; and long time is needed for secondary precipitation.

Description

Technical Field

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

[0002] Land conservation, water conservation and emission reduction are green environmental protection requirements that the civil construction field pays attention to. At present, a large amount of mud will be discharged during the construction of pile foundations, foundation pit enclosures and underground structures, and the discharged mud contains a large amount of drilling debris. If it is directly passed into the pit for reuse, it will not only fail to meet the requirements of wall protection, but may even damage the pit wall, directly affecting its service life. Therefore, the discharged mud needs to be properly treated until it meets the requirements of wall protection before it can be re-input into the pit (hole) for use through a mud pump. A mud separator is needed to separate and discharge the earth and slag in the mud water, and achieve the purpose of reusing the mud water. When the mud is recycled, the stones in the mud need to be filtered, and the mud blocks in the mud need to be diluted.

[0003] In actual projects, such as the construction of sports center projects, the amount of foundation pit mud that needs to be discharged is very huge. After the foundation pit mud is discharged, it needs to be efficiently processed to discharge a large amount of liquid. Traditional mud circulation treatment equipment is generally composed of desander, desilter, mud cleaner, funnel, pump, tank, dosing device, agitator, etc. The mud is processed by vibrating screen, desander, desilter, centrifuge and other solid control equipment. If dosing is required, a dosing device is added for proportioning.

[0004] In actual use, mud and water often require a long time to settle. During this process, if there is still mud in the subsequent water, the water will be poured directly into the sedimentation tank, disrupting the original sedimentation of the mud and water in the sedimentation tank, making the liquid in the sedimentation tank turbid, and prolonging the sedimentation time of the mud and water.

[0005] Faced with the above situation, how to effectively solve the problem of the subsequent fusion of turbid water and water in the sedimentation tank has become a problem that needs to be solved. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a foundation pit mud circulation treatment device and treatment method, which realizes the re-discharge of mud that has not been completely precipitated in the sedimentation tank into the sedimentation tank, and different mud turbidities can also be discharged into the corresponding sludge sedimentation area in the sedimentation tank, thereby preventing muds with different turbidities from mixing, causing mud with lower turbidity to become turbid again and increasing the sedimentation time.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a foundation pit mud circulation treatment device, comprising a sedimentation tank, and a plurality of sedimentation tanks located behind the sedimentation tank, a conveying assembly arranged obliquely upward is arranged at the bottom of the sedimentation tank, and a discharge port for conveying mud and sand by the conveying assembly is opened on one side of the sedimentation tank, the conveying assembly comprises a protective shell arranged at the discharge port, a driving motor fixedly connected to the protective shell, and a spiral conveying blade rotatably arranged in the protective shell, and the spiral conveying blade passes through the discharge port and extends into the bottom of the sedimentation tank.

[0008] A partition is fixedly arranged inside the sedimentation tank, and a sedimentation area is formed between the lower end of the partition and the bottom plate of the sedimentation tank. A feed area is formed on one side of the partition, and a discharge area is formed on the other side, wherein the feed area is located above the discharge port.

[0009] A diversion assembly connected to the drainage area is arranged on one side of the sedimentation tank. The diversion assembly includes a main pipe, multiple diversion pipes connected to the main pipe, and multiple turbidity sensor probes vertically distributed on the inner wall surface of the drainage area of ​​the sedimentation tank.

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

[0011] The lower side end of the main flow pipe is provided with a one-way delivery pump and a turbidity detection mechanism, and each branch pipe is independently provided with a branch solenoid valve.

[0012] A turbidity sensor module is arranged at the bottom of each sedimentation tank, and a delivery pipe is connected between the discharge area of ​​the sedimentation tank and the sedimentation tank at the first position and between adjacent sedimentation tanks.

[0013] The bottom of each sedimentation tank is connected to a return pipe which is independently connected to the main pipe, and each return pipe is equipped with a return 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, and a material discharge port for mud and sand is opened at one side end of the protective shell.

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

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

[0017] As a preferred technical solution of the present invention, a delivery pipe between the drainage area of ​​the sedimentation tank and the sedimentation tank at the first position, one end of the delivery pipe is plugged into the upper area of ​​the drainage area, and the other end of the delivery pipe is plugged into the bottom area of ​​the sedimentation tank at the first position; A delivery pipe between adjacent sedimentation tanks, one end of the delivery pipe being plugged into the upper region of the upstream sedimentation tank, and the other end of the delivery pipe being plugged into the bottom region of the downstream sedimentation tank; The delivery pipe is provided with a pump body for delivering the mud-sand mixed liquid.

[0018] As a preferred technical solution of the present invention, the width of the feed zone of the sedimentation tank is greater than the width of the discharge zone.

[0019] As a preferred technical solution of the present invention, the turbidity detection mechanism arranged on the main flow pipe is located at the downstream side of the one-way delivery pump.

[0020] The present invention provides a foundation pit mud circulation treatment device, comprising the following steps: S1. The slurry is discharged from the feed area into the sedimentation tank. After sedimentation, the mud and sand accumulate in the sedimentation area. The conveying component is started to discharge the mud and sand from the sedimentation tank from the discharge port. The separated liquid enters the discharge area. The upper liquid in the discharge area is transported to the bottom of the first sedimentation tank through the conveying pipe. The upper liquid of the first sedimentation tank is transported to the bottom of the sedimentation tank at the downstream adjacent position through the conveying pipe.

[0021] S2. Multiple turbidity sensor probes in the sedimentation tank start working. Suppose the turbidity information monitored by multiple turbidity sensor probes from top to bottom is [W1, W2, W3, ..., W n ].

[0022] S3. The turbidity sensor modules in all the sedimentation tanks start to work, and the turbidity sensor module in any sedimentation tank detects that the turbidity of the liquid in the sedimentation tank is Wx.

[0023] S3.1. If Wx≤W1, the liquid return pipe connected to the bottom of the current sedimentation tank remains closed and there is no liquid return action.

[0024] 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 the one-way delivery pump is started at the same time. All sub-solenoid valves are opened first, and the turbidity detection mechanism detects the turbidity of the refluxed liquid, recorded as Wy, and then all sub-solenoid valves are closed.

[0025] Determine whether Wy is equal to (W1, W2], (W2, W3], (W3, W4], ..., (W n-1 , W n ] parameter range relationship, open the solenoid valve of the corresponding position of the shunt pipe, and the turbid liquid will flow back to the discharge area position corresponding to the turbidity parameter.

[0026] Among them, if Wy>W n , then the solenoid valve of the lowest position shunt pipe opens, and the turbid liquid flows back to the bottom of the drainage area.

[0027] The present invention provides a foundation pit mud circulation treatment device, which has the following beneficial effects: The present invention sets a plurality of sedimentation tanks. After the muddy water in the sedimentation tank is detected by a turbidity sensor module and a turbidity detection mechanism, the muddy water with different turbidities is returned to the drainage area position corresponding to the turbidity parameter, and the liquid located at the upper part of the drainage area is transported to the bottom of the first sedimentation tank through a delivery pipe. The upper liquid of the first sedimentation tank is transported to the bottom of the sedimentation tank at the downstream adjacent position through a delivery pipe to continue sedimentation. In this way, the muddy water with different turbidities is discharged into the drainage area position corresponding to the turbidity parameter, which can prevent the muddy water with higher turbidity from being discharged into the area with less sludge turbidity, causing the water in the area with less turbidity to be stirred and turbid, resulting in a longer time for re-sedimentation, thereby ensuring the efficient sedimentation of silt in each turbidity area of ​​the drainage area, and also ensuring the clarity and discharge efficiency of the drainage at the top of the drainage area.

[0028] The present invention realizes efficient and continuous discharge of foundation pit mud and effectively performs sedimentation. At the same time, when the drainage does not meet the standards, the influence of the reflux turbid liquid on the sedimentation discharge efficiency of the initial first sedimentation tank is reduced to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0031] Figure 3 It is a schematic diagram of the overall structure of the present invention.

[0032] In the figure: 1. sedimentation tank, 101. partition, 102. sedimentation area, 103. feed area, 104. discharge area, 105. discharge port; 2. sedimentation tank; 3. return liquid pipe; 4. turbidity sensor module; 5. return liquid solenoid valve; 6. diversion assembly, 601. main pipe, 602. diversion pipe, 603. diversion solenoid valve, 604. turbidity sensor probe, 605. one-way delivery pump, 606. turbidity detection mechanism; 7. delivery assembly, 701. protective shell, 702. drop port, 703. drive motor, 704. spiral delivery blade; 8. delivery pipe. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0034] Embodiment 1: The present invention designs a foundation pit mud circulation treatment device, which mainly includes the following contents: Combination Figure 1 , Figure 2, a sedimentation tank 1, and a plurality of sedimentation tanks 2 located behind the sedimentation tank 1. A conveying assembly 7 arranged obliquely upward is arranged at the bottom of the sedimentation tank 1. A discharge port 105 for conveying mud and sand by the conveying assembly 7 is opened on one side of the sedimentation tank 1. The conveying assembly 7 includes a protective shell 701 fixedly arranged at the position of the discharge port 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 an output shaft of the driving motor 703 is fixedly connected to one end of the spiral conveying blade 704. The spiral conveying blade 704 passes through the discharge port 105 and extends into the bottom of the sedimentation tank 1. A drop port 702 for dropping mud and sand is opened on one side end of the protective shell 701.

[0035] Combination Figure 3 A partition 101 is fixedly arranged inside the sedimentation tank 1, and a sedimentation area 102 is formed between the lower side end of the partition 101 and the bottom plate of the sedimentation tank 1, the partition 101 and one side of the sedimentation tank 1 form a feeding area 103, and the partition 101 and the other side of the sedimentation tank 1 form a drainage area 104. The width of the feeding area 103 of the sedimentation tank 1 is greater than the width of the drainage area 104, wherein the feeding area 103 is located above the discharge port 105.

[0036] Combination Figure 2 , Figure 3 A diversion assembly 6 connected to the drainage area 104 is provided on one side of the sedimentation tank 1. The diversion assembly 6 includes a main flow pipe 601. The surface of the main flow pipe 601 is connected to multiple diversion pipes 602. Multiple turbidity sensor probes 604 are vertically distributed on the inner wall surface of the drainage area 104 in the sedimentation tank 1. Among them, a turbidity sensor probe 604 is arranged between two adjacent diversion pipes 602 and the openings connected to the sedimentation tank 1. A turbidity sensor probe 604 is also arranged above the opening of the highest diversion pipe 602 connected to the sedimentation tank 1. A one-way delivery pump 605 and a turbidity detection mechanism 606 are arranged at the lower side end of the main flow pipe 601. Each diversion pipe 602 is independently equipped with a sub-solenoid valve 603. The bottom of each sedimentation tank 2 is connected to a return liquid independently connected to the main flow pipe 601. Tube 3, each return liquid pipe 3 is equipped with a return liquid solenoid valve 5, the connection positions of all return liquid pipes 3 and the main pipe 601 are located below the one-way delivery pump 605 and the turbidity detection mechanism 606, the connection positions of all sub-solenoid valves 603 and the main pipe 601 are located above the one-way delivery pump 605 and the turbidity detection mechanism 606, the turbidity detection mechanism 606 configured on the main pipe 601 is located on the downstream side of the one-way delivery pump 605, and the turbidity detection mechanism 606 is set on the downstream side of the one-way delivery pump 605. The reason for setting the turbidity detection mechanism 606 on the downstream side of the one-way delivery pump 605 is that the muddy water in multiple sedimentation tanks 2 flows into the return liquid pipe 3, and the muddy water is not completely mixed before passing through the one-way delivery pump 605. After being stirred and mixed by the one-way delivery pump 605, the turbidity detection mechanism 606 can detect the turbidity of the muddy water in the main pipe 601 more accurately.

[0037] Combination Figure 2 , Figure 3 A turbidity sensor module 4 is arranged at the bottom of each sedimentation tank 2. A delivery pipe 8 is connected between the discharge area 104 of the sedimentation tank 1 and the sedimentation tank 2 at the first position and between adjacent sedimentation tanks 2. The delivery pipe 8 between the 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 plugged into the upper area of ​​the discharge area 104, and the other end of the delivery pipe 8 is plugged into the bottom area of ​​the sedimentation tank 2 at the first position. The delivery pipe 8 between adjacent sedimentation tanks 2, one end of the delivery pipe 8 is plugged into the upper area of ​​the upstream sedimentation tank 2, and the other end of the delivery pipe 8 is plugged into the bottom area of ​​the downstream sedimentation tank 2. The delivery pipe 8 is equipped with a pump body for conveying silt mixed liquid.

[0038] Embodiment 2: The present invention designs a method for treating foundation pit mud using a foundation pit mud circulation treatment device, and the specific working principle is as follows: First, the mud is discharged from the feed area 103 into the sedimentation tank 1. After sedimentation, the mud and sand are accumulated in the sedimentation area 102. The conveying component 7 is started to discharge the mud and sand from the sedimentation tank 1 from the discharge port 105. The separated liquid enters the discharge area 104. The upper liquid of the discharge area 104 is conveyed to the bottom of the first sedimentation tank 2 through the conveying pipe 8. The upper liquid of the first sedimentation tank 2 is conveyed to the bottom of the sedimentation tank 2 at the downstream adjacent position through the conveying pipe 8.

[0039] Then, the multiple turbidity sensor probes 604 in the sedimentation tank 1 start to work. Assume that the turbidity information monitored by the multiple turbidity sensor probes 604 from top to bottom is [W1, W2, W3, ..., W n ], the turbidity sensor modules 4 in all the sedimentation tanks 2 start to work, and the turbidity sensor module 4 in any sedimentation tank 2 detects that the turbidity of the liquid in the sedimentation tank 2 is Wx.

[0040] If Wx≤W1, the liquid return pipe 3 connected to the bottom of the current sedimentation tank 2 remains closed and there is no liquid return action.

[0041] If Wx>W1, the liquid return solenoid valve 5 on the liquid return pipe 3 connected to the bottom of the current sedimentation tank 2 is opened, and the one-way delivery pump 605 is started at the same time. All sub-solenoid valves 603 are opened first, and the turbidity detection mechanism 606 detects the turbidity of the refluxed liquid, recorded as Wy, and then all sub-solenoid valves 603 are closed.

[0042] Determine whether Wy is equal to (W1, W2], (W2, W3], (W3, W4], ..., (W n-1 , W n ] parameter range relationship, open the solenoid valve 603 of the corresponding position of the shunt pipe 602, and the turbid liquid flows back to the discharge area position corresponding to the turbidity parameter.

[0043] Among them, if Wy>W n, then the solenoid valve 603 of the lowest position shunt pipe 602 opens, and the turbid liquid flows back to the bottom of the drainage area.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foundation pit mud circulation treatment device, comprising a sedimentation tank (1), and a plurality of sedimentation tanks (2) located after the sedimentation tank (1), wherein a conveying assembly (7) arranged obliquely upward is arranged at the bottom of the sedimentation tank (1), and a discharge port (105) for conveying mud and sand by the conveying assembly (7) is opened on one side of the sedimentation tank (1), and the conveying assembly (7) comprises a protective shell (701) arranged at the discharge port (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), wherein the spiral conveying blade (704) passes through the discharge port (105) and extends into the bottom of the sedimentation tank (1), 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 feed area (103), and the other side forms a discharge area (104), wherein the feed area (103) is located above the discharge port (105); A flow diversion assembly (6) connected to the drainage area (104) is provided on one side of the sedimentation tank (1), wherein the flow diversion assembly (6) comprises a main flow pipe (601), a plurality of flow diversion pipes (602) connected to the main flow pipe (601), and a plurality of turbidity sensor probes (604) vertically distributed on the inner wall surface of the drainage area (104) of the sedimentation tank (1); A turbidity sensor probe (604) is disposed between each of the two adjacent shunt pipes (602) and the openings communicating with the sedimentation tank (1), and a turbidity sensor probe (604) is also disposed above the opening communicating with the highest shunt pipe (602) and the sedimentation tank (1); A one-way delivery pump (605) and a turbidity detection mechanism (606) are provided at the lower side end of the main flow pipe (601), and each of the branch flow pipes (602) is independently provided with a branch solenoid valve (603); A turbidity sensor module (4) is disposed at the bottom of each sedimentation tank (2), and a delivery pipe (8) is connected between the discharge area (104) of the sedimentation tank (1) and the sedimentation tank (2) at the first position, as well as between adjacent sedimentation tanks (2); The bottom of each sedimentation tank (2) is connected to a liquid return pipe (3) which is independently connected to the main flow pipe (601), and each liquid return pipe (3) is provided with a liquid return solenoid valve (5).

2. A foundation pit mud circulation treatment device 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 discharge port (702) for discharging mud and sand is provided at one side end of the protective shell (701).

3. The foundation pit mud circulation treatment device according to claim 1 is characterized by: The connection positions of all liquid return pipes (3) and the main flow pipe (601) are located below the one-way delivery pump (605) and the turbidity detection mechanism (606); The connection positions of all sub-solenoid valves (603) and the main flow pipe (601) are located above the one-way delivery pump (605) and the turbidity detection mechanism (606).

4. The foundation pit mud circulation treatment device according to claim 1 is characterized by: A delivery pipe (8) between the drainage area (104) of the sedimentation tank (1) and the first sedimentation tank (2), one end of the delivery pipe (8) being plugged into the upper area of ​​the drainage area (104), and the other end of the delivery pipe (8) being plugged into the bottom area of ​​the first sedimentation tank (2); A delivery pipe (8) between adjacent sedimentation tanks (2), one end of the delivery pipe (8) being plugged into the upper region of the upstream sedimentation tank (2), and the other end of the delivery pipe (8) being plugged into the bottom region of the downstream sedimentation tank (2); The delivery pipe (8) is provided with a pump body for delivering the mud-sand mixed liquid.

5. The foundation pit mud circulation treatment device according to claim 1 is characterized by: The width of the feed zone (103) of the sedimentation tank (1) is greater than the width of the discharge zone (104).

6. The foundation pit mud circulation treatment device according to claim 1, characterized in that: The turbidity detection mechanism (606) disposed on the main flow pipe (601) is located on the downstream side of the one-way delivery pump (605).

7. A method for circulating treatment of foundation pit mud, characterized in that: A foundation pit mud circulation treatment device according to any one of claims 1 to 6 comprises the following steps: S1. The slurry is discharged from the feed area (103) into the sedimentation tank (1). After sedimentation, the sludge is accumulated in the sedimentation area (102). The conveying component (7) is started to discharge the sludge from the discharge port (105) out of the sedimentation tank (1). The separated liquid enters the discharge area (104). The upper liquid of the discharge area (104) is conveyed to the bottom of the first sedimentation tank (2) through the conveying pipe (8). The upper liquid of the first sedimentation tank (2) is conveyed to the bottom of the sedimentation tank (2) at the downstream adjacent position through the conveying pipe (8); S2. The plurality of turbidity sensor probes (604) in the sedimentation tank (1) start to work. It is assumed that the turbidity information monitored by the plurality of turbidity sensor probes (604) from top to bottom is [W1, W2, W3, ..., W n ]; S3. The turbidity sensor modules (4) in all the sedimentation tanks (2) start to work, and the turbidity sensor module (4) in any sedimentation tank (2) detects that the turbidity of the liquid in the sedimentation tank (2) is Wx; S3.

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

2. 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 the one-way delivery pump (605) is started. All the sub-solenoid valves (603) are opened first, and the turbidity detection mechanism (606) detects the turbidity of the refluxed liquid, which is recorded as Wy, and then all the sub-solenoid valves (603) are closed; Determine whether Wy is equal to (W1, W2], (W2, W3], (W3, W4], ..., (W n-1 , W n ], the solenoid valve (603) of the shunt pipe (602) at the corresponding position is opened, and the turbid liquid flows back to the discharge area position corresponding to the turbidity parameter; Among them, if Wy>W n , the solenoid valve (603) of the lowest position shunt pipe (602) opens, and the turbid liquid flows back to the bottom of the drainage area.

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