A sludge treatment device and its usage method

Abstract

This invention discloses a sludge treatment device and its usage method, including a centrifuge, a suction pump, and a mixing tank. The centrifuge is equipped with a feeding pipe and a linear module. The mixing tank is equipped with a control unit, which includes several control buttons. The mixing tank is equipped with a detection unit. The detection unit includes a feeding bucket and a pressing plate, with a first spring between the pressing plate and the mixing tank. The pressing plate is connected to a detection plate via a pressing rod. After the pressing plate presses against the sludge in the feeding bucket, the corresponding control button can be triggered based on the height of the material that has not passed through the pressing plate. This invention provides a sludge treatment device that uses a mixing tank in conjunction with a horizontal centrifuge, making the sludge treatment more uniform. By detecting the solid-liquid ratio in the mixing tank, the feeding position of the feeding pipe in the centrifuge is adjusted, thereby changing the separation stroke of different sludge types in the centrifuge and effectively improving the sludge separation quality.

Description

Technical Field

[0001] This invention relates to the field of sludge treatment equipment technology, and in particular to a sludge treatment device and its usage method. Background Technology

[0002] A horizontal screw centrifuge, also known as a decanter centrifuge, is a commonly used sludge separation device. It is typically used to treat sludge mixed with water. The sludge is injected into the rotating drum of the decanter centrifuge through a feed pipe for separation and rotation, thereby achieving the separation of solids and liquids in the sludge and achieving the effect of sludge separation treatment. After separation, the solids in the sludge are discharged from the end away from the feed pipe, while the liquids are discharged from the end closer to the feed pipe.

[0003] Existing decanter centrifuges typically use sludge pumps to directly transport sludge. Furthermore, the discharge end of the decanter centrifuge's feed pipe is fixed relative to the centrifuge itself. Therefore, regardless of the solid-to-liquid ratio in the sludge, its separation stroke within the decanter centrifuge is relatively fixed. This approach presents the following disadvantages:

[0004] Sludge pumps that directly transport sludge without treatment can lead to uneven distribution of particles and liquid in the sludge. When there is a large amount of liquid, it may mix with the solids and be discharged due to insufficient separation stroke, affecting the quality and efficiency of sludge solid-liquid separation. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a sludge treatment device and its usage method.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a sludge treatment device, comprising...

[0007] Centrifuge;

[0008] A suction pump that provides sludge feedstock to the centrifuge;

[0009] And a mixing tank that is connected to a suction pump and can mix the sludge evenly;

[0010] The centrifuge is equipped with a sludge injection pipe and a linear module for driving the sludge injection pipe to move laterally inside the centrifuge to change the sludge's drop position inside the centrifuge, thereby changing the separation stroke.

[0011] The mixing tank is equipped with a control unit for controlling the displacement distance of the linear module. The control unit includes several control buttons connected to the linear module via a PLC controller.

[0012] The mixing tank is equipped with a detection unit that works in conjunction with the control unit;

[0013] The detection unit includes a material receiving bucket that can be raised and lowered to pick up material inside the mixing tank and a pressing plate that works with it. A first spring is provided between the pressing plate and the mixing tank.

[0014] The extrusion plate is connected to a detection plate that cooperates with the control unit via an extrusion rod;

[0015] After the extrusion plate squeezes the sludge in the feeding bucket, the corresponding control button can be triggered according to the height of the material that has not passed through the extrusion plate.

[0016] In the above scheme, preferably, the injection pipe is slidably mounted on the centrifuge, and the injection pipe is provided with a connecting flange;

[0017] The linear module is equipped with a slider that is connected to the connecting flange.

[0018] In the above scheme, preferably, the mixing tank is provided with a lifting push rod for controlling the lifting of the material taking tank, and the lifting push rod is connected to the material taking tank through a lifting rod.

[0019] In the above scheme, preferably, the extrusion rod is provided with a limiting plate, the mixing tank is provided with a control bracket, and the first spring is provided between the limiting plate and the control bracket.

[0020] In the above scheme, preferably, the extrusion plate is a porous filter plate.

[0021] In the above scheme, preferably, the control bracket is provided with a drive push rod for driving the displacement of the control button, and the drive push rod is provided with a button plate for mounting the control button.

[0022] In the above scheme, preferably, the mixing tank is provided with a proximity switch electrically connected to the drive push rod, and the proximity switch cooperates with the material receiving tank;

[0023] The bottom of the mixing tank is equipped with a liquid level switch, which is electrically connected to the drive push rod.

[0024] In the above scheme, preferably, the bottom of the material receiving hopper is provided with a discharge plate, and the discharge plate is provided with guide rods on both sides that cooperate with the material receiving hopper. A second spring is provided between the guide rods and the material receiving hopper.

[0025] In the above scheme, preferably, the material hopper is provided with a guide plate that cooperates with the guide rod, and the guide rod passes through the guide plate and is fixed with a positioning plate. Any of the positioning plates is provided with a pull rope connected to the button plate.

[0026] In the above scheme, a preferred method of using a sludge treatment device is as follows:

[0027] S1: Add the sludge to the mixing tank, and then the mixing tank will stir the sludge to make it evenly mixed.

[0028] S2: The lifting push rod drives the material collection bucket to descend, and the material collection bucket descends into the mixing bucket to load the sludge into the material collection bucket. Then the lifting push rod returns to its original position and triggers the proximity switch.

[0029] S3: During the upward lifting process of the material bucket, it cooperates with the extrusion plate. At this time, the liquid is placed above the extrusion plate, while the solid is separated below by the extrusion plate. Due to the volume change of the solid, the extrusion plate slides upward to compress the first spring.

[0030] S4: The extrusion plate slides upward, causing the extrusion rod to rise, thereby positioning the detection plate upward, which corresponds to the control button at that height;

[0031] S5: After a certain delay, the proximity switch triggers the drive push rod to move, which pushes the control button against the top of the detection board and triggers the corresponding control button. The control button transmits the signal to the linear module through the PLC controller, causing the injection tube to move a corresponding distance.

[0032] S6: While the push rod drives the button plate to move, the button plate pulls the unloading plate through the pull rope to compress the second spring and separate it from the bottom of the feeding barrel, thereby discharging the solid particles below the extrusion plate into the mixing barrel. At the same time, the liquid above is discharged back into the mixing barrel through the holes on the extrusion plate, while the detection plate and the corresponding control button are always kept in this position.

[0033] S7: After the sludge in the mixing tank is processed, the liquid level switch is triggered, which resets the drive push rod. At this time, the detection plate disengages from the control button and resets under the action of the first spring, ready for the next detection.

[0034] The beneficial effects of this invention are: This invention provides a sludge treatment device that combines a mixing tank with a horizontal centrifuge, making the sludge treatment more uniform. By detecting the solid-liquid ratio in the mixing tank and adjusting the injection position of the injection pipe in the centrifuge, the separation stroke of different sludge types in the centrifuge is changed, thereby effectively improving the efficiency and quality of sludge separation. Attached Figure Description

[0035] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0036] Figure 2 This is a partial cross-sectional view of the control unit and detection unit of the present invention.

[0037] Figure 3 This is a partial enlarged structural diagram of point A in the present invention.

[0038] Figure 4 This is a three-dimensional structural diagram of the extrusion plate and extrusion rod of the present invention.

[0039] Figure 5 This is a schematic diagram showing the unloading plate and the material receiving bucket in the open state of the present invention. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: See below Figures 1-5 A sludge treatment device includes a centrifuge 1, a suction pump 2, and a mixing tank 3. The centrifuge 1 is equipped with a feeding pipe 101. Figure 1 As shown, one end of the suction pump 2 is connected to the bottom of the mixing tank 3, and the other end is connected to the injection pipe 101 through a hose. When the suction pump 2 is working, it can suck the sludge in the mixing tank 3 into the injection pipe 101, and then inject it into the drum of the centrifuge 1 through the injection pipe 101.

[0041] The centrifuge 1 has solid outlets and liquid outlets on both sides, such as... Figure 1 As shown, the solid outlet is located on the right side of the centrifuge 1, and the liquid outlet is located on the left side of the centrifuge 1. After the sludge is injected into the drum by the feed pipe 101, the solid and liquid in the sludge are separated by the centrifugal force of the drum. The solid is discharged from the solid outlet, and the liquid is discharged from the liquid outlet. This is the existing technology of horizontal screw centrifuges, and will not be described in detail here.

[0042] The mixing tank 3 is equipped with stirring blades. After the sludge is poured into the mixing tank 3, the stirring blades stir and mix the sludge evenly, so that the solid-liquid ratio of the sludge in the mixing tank 3 is evenly mixed. Figure 1 As shown, the stirring blades are connected to the stirring motor. After the stirring tank 3 is filled with sludge, the stirring motor is started to drive the stirring blades to mix the sludge. Preferably, the suction pump 2 starts working 10-30 minutes after the stirring motor starts, and sucks the mixed sludge into the centrifuge 1.

[0043] The feeding pipe 101 is slidably mounted on the centrifuge 1. Specifically, one end of the feeding pipe 101 is fixed with a connecting flange 103 outside the centrifuge 1, and the other end passes through the rotating drum of the centrifuge 1 and is placed inside the rotating drum. The position of its end inside the centrifuge 1 can change the separation stroke of the sludge injected into the centrifuge 1. Specifically, the centrifuge 1 includes a main frame, on which a linear module 102 for driving the feeding pipe 101 to slide is provided. A slider 104 is provided on the linear module 102. The slider 104 is fixedly connected to the connecting flange 103 by bolts. The linear module 102 uses a servo motor to drive the slider 104 to slide back and forth. The linear module 102 can be controlled by inputting signals through a PLC controller to make the slider 104 slide to any position on the module.

[0044] like Figure 1As shown, when the linear module 102 drives the slider 104 to slide to the right, the distance between the right end of the injection pipe 101 and the solid outlet is shortened. At this time, the sludge separation stroke is shortened, which is suitable for sludge with a high solid content. When the liquid content in the sludge is high, the stroke to separate the solid from the liquid needs to be extended. At this time, it is necessary to control the linear module 102 to drive the slider 104 to slide to the left. The control of the linear module 102 can be realized by giving it an input signal through the PLC.

[0045] To detect the liquid-to-solid ratio in the sludge, the mixing tank 3 is equipped with a detection unit 5. Specifically, the detection unit 5 includes a material collection bucket 501 that can be raised and lowered within the mixing tank 3 to collect material, and a matching extrusion plate 502. Specifically, a lifting push rod 301 is fixedly installed on the left outer wall of the mixing tank 3. The lifting push rod 301 is preferably an electric push rod, but a cylinder can also be used if an air source is available. The extension end of the lifting push rod 301 is connected to a lifting rod 302 via a fixed connecting plate. The lifting rod 302 extends downward and is fixedly connected to the outer wall of the material collection bucket 501. Initially, the material collection bucket 501 is placed outside the mixing tank 3. When the lifting push rod 301 is powered on, it drives the material collection bucket 501 downward to be placed inside the mixing tank 3, causing the sludge in the mixing tank 3 to flow into the material collection bucket 501 and fill it, thus realizing the collection of sludge from the mixing tank 3.

[0046] A control bracket 303 is fixedly installed on the top of the mixing tank 3. The extrusion plate 502 is elastically slidably mounted on the control bracket 303. The extrusion plate 502 is preferably a porous filter plate, and its filter holes can be specifically set according to the material particle requirements of sludge separation. Alternatively, a porous membrane that allows liquid to pass through can be covered on the filter plate. The outer edge of the extrusion plate 502 is preferably slidably attached to the inner wall of the feeding tank 501. An upwardly extending extrusion rod 504 is fixedly installed on the upper end face of the extrusion plate 502. The extrusion rod 504 slides upward through the control bracket 303. After the extrusion rod 504 passes through the control bracket 303, a detection plate 505 is fixedly installed.

[0047] The section where the extrusion rod 504 and the control bracket 303 cooperate is preferably a hexagonal rod. A limiting plate 506 is provided on the extrusion rod 504. The limiting plate 506 is located below the hexagonal rod section. A first spring 503 is provided between the limiting plate 506 and the control bracket 303. The first spring 503 is sleeved on the extrusion rod 504 and its two ends respectively abut against the upper end face of the limiting plate 506 and the lower end face of the control bracket 303, thereby realizing the elastic sliding of the extrusion plate 502 relative to the control bracket 303.

[0048] Initially, when the feeding bucket 501 is above the mixing bucket 3, the extrusion plate 502 is placed at the bottom of the feeding bucket 501, and the first spring 503 is in a freely extended state. When the feeding bucket 501 descends, the feeding is completed, and it slowly rises, the sludge in the feeding bucket 501 is filtered by the extrusion plate 502. The liquid part is placed above the extrusion plate 502, while the solid part is squeezed below by the extrusion plate 502. When there is no more liquid below the extrusion plate 502, the extrusion plate 502 stops relative to the feeding bucket 501, and the feeding bucket 501 continues to rise and reset. At this time, the extrusion plate 502 compresses the first spring 503 under the lifting force of the feeding bucket 501 and slides relative to the control bracket 303, causing the detection plate 505 to slide upward away from the upper surface of the control bracket 303. That is, the higher the proportion of solids in the sludge, the farther the detection plate 505 is from the upper surface of the control bracket 303, and vice versa.

[0049] The control bracket 303 is equipped with a control unit 4 for controlling the displacement distance of the linear module 102. The control unit 4 includes several control buttons 401 connected to the linear module 102 via a PLC controller. Specifically, the control bracket 303 is equipped with drive push rods 402 that drive the control buttons 401 to slide. The drive push rods 402 are preferably electric push rods. Figure 2 As shown, a button plate 403 is fixedly installed at the push-out end of the left end of the drive push rod 402. The control buttons 401 are arranged sequentially from bottom to top on the end face of the button plate 403 near the detection plate 505. The control buttons 401 can control the linear module 102 to drive the injection tube 101 to slide to the right a longer distance, that is, the detection plate 505 moves upward a greater distance from the control bracket 303. At this time, the solid content in the sludge is higher. The higher the control button is triggered, and the PLC controls the linear module 102 to drive the injection tube 101 to slide to the right a longer distance. This makes the injection position of the injection tube 101 in the centrifuge 1 closer to the solid outlet, that is, the separation stroke is shortened. Conversely, when the liquid content in the sludge is higher, the detection plate 505 is closer to the control bracket 303. The injection position of the injection tube 101 in the centrifuge 1 is closer to the liquid outlet, that is, the separation stroke is extended, thereby improving the effectiveness of sludge separation.

[0050] The mixing tank 3 is equipped with a proximity switch 404 electrically connected to the drive push rod 402. The proximity switch 404 cooperates with the material taking tank 501. That is, after the material taking tank 501 descends and takes material, it resets and triggers the proximity switch 404. The proximity switch 404 controls the drive push rod 402 to push the button plate 403 to the left, so that the control button 401 at the corresponding position abuts against the detection plate 505, thereby triggering the control button corresponding to the detection plate at that position. The signal is then transmitted to the PLC to control the linear module 102 to displace the injection tube 101.

[0051] The bottom of the mixing tank 3 is equipped with a liquid level switch 405, which is electrically connected to the drive push rod 402. When all the sludge in the mixing tank 3 has been processed, the liquid level switch 405 is triggered to cause the drive push rod 402 to retract to its original position.

[0052] The bottom of the material receiving hopper 501 is provided with a discharge plate 601. Symmetrical guide rods 602, cooperating with the material receiving hopper 501, are provided on both sides of the discharge plate 601. A second spring 603 is provided between the guide rod 602 and the material receiving hopper 501. A guide plate 604, cooperating with the guide rod 602, is provided on the material receiving hopper 501. That is, the guide rod 502 slides through the guide plate 604. After passing through the guide plate 604, a positioning plate 605 is fixedly installed on the guide rod 602. The second spring 603 is sleeved on the guide rod 602, with its two ends respectively connected to the guide plate 604 and the positioning plate 605. The positioning plate 605 is provided with a pull rope 606 connected to the button plate 403. When the material taking barrel 501 completes the material taking and resets, the button plate 403 slides to the left under the drive of the drive push rod 402. At the same time, the pull rope 606 pulls the positioning plate 605 to make the unloading plate 601 disengage from the bottom of the material taking barrel 501. At this time, the solid particles at the bottom of the material taking barrel 501 are discharged. At the same time, the liquid above the extrusion plate 502 is discharged downward through the hole on the extrusion plate 502 and flushes the unloading plate 601. The discharged solid particles and liquid are returned to the mixing tank 3.

[0053] The method of using the sludge treatment device described above is as follows:

[0054] S1: Add the sludge into the mixing tank 3, and then the mixing tank 3 stirs the sludge to make the sludge evenly mixed.

[0055] S2: The lifting push rod 301 drives the material collection bucket 501 to descend. The material collection bucket 501 descends into the mixing bucket 3 and loads the sludge into the material collection bucket. Then the lifting push rod 301 returns to its original position and triggers the proximity switch 404.

[0056] S3: During the upward lifting process of the material collection bucket 501, it cooperates with the extrusion plate 502. At this time, the liquid is placed above the extrusion plate 502, while the solid is separated below by the extrusion plate 502. Due to the volume change of the solid, the extrusion plate 502 slides upward to compress the first spring 503.

[0057] S4: The extrusion plate 502 slides upward, causing the extrusion rod 504 to rise, thereby causing the detection plate 505 to be positioned upward, corresponding to the control button 401 at that height;

[0058] S5: After a certain delay, the proximity switch 404 triggers the drive push rod 402 to move, causing the control button 401 to be pressed against the detection board 505 to trigger the corresponding position of the control button 401. The control button 401 transmits the signal to the linear module 102 through the PLC controller, causing the injection tube 101 to move a corresponding distance.

[0059] S6: While the push rod 402 drives the button plate 403 to move, the button plate 403 pulls the unloading plate 601 through the pull rope 606 to compress the second spring 603 so that it is separated from the bottom of the feeding barrel 501, thereby discharging the solid particles below the extrusion plate 502 into the mixing barrel 3. At the same time, the liquid above is discharged back into the mixing barrel 3 through the hole on the extrusion plate 502, while the detection plate 505 and the corresponding control button 401 are always kept in this position.

[0060] S7: After the sludge in the mixing tank 3 is processed, the liquid level switch 405 is triggered, which resets the drive push rod 402. At this time, the detection plate 505 is disengaged from the control button 401 and resets under the action of the first spring 503, ready for the next detection.

[0061] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sludge treatment device, characterized in that it comprises a centrifugal machine (1); a suction pump (2) for providing the centrifugal machine (1) with sludge raw materials; and a stirring barrel (3) connected with the suction pump (2) and capable of stirring the sludge uniformly; the centrifugal machine (1) is provided with a feeding pipe (101) for injecting sludge and a linear module (102) for driving the feeding pipe (101) to move laterally in the centrifugal machine (1) so as to change the sludge dropping position in the centrifugal machine (1) and thus change the separation stroke; the stirring barrel (3) is provided with a control unit (4) for controlling the displacement distance of the linear module (102), the control unit (4) comprises a plurality of control buttons (401) connected with the linear module (102) through a PLC controller; the stirring barrel (3) is provided with a detection unit (5) matched with the control unit (4); the detection unit (5) comprises a material taking barrel (501) capable of lifting and taking materials in the stirring barrel (3) and a pressing plate (502) matched therewith; the pressing plate (502) is connected with a detection plate (505) matched with the control unit (4) through a pressing rod (504); the pressing plate (502) can trigger the corresponding control button (401) according to the material height not passing through the pressing plate (502) after the sludge in the material taking barrel (501) is pressed; the stirring barrel (3) is provided with a lifting push rod (301) for controlling the lifting of the material taking barrel (501), the lifting push rod (301) is connected with the material taking barrel (501) through a lifting rod (302); the pressing rod (504) is provided with a limiting plate (506), the stirring barrel (3) is provided with a control support (303), and a first spring (503) is arranged between the limiting plate (506) and the control support (303); the pressing plate (502) is a porous filter plate; the control buttons (401) are arranged on the end face of a button plate (403) near the detection plate (505) from bottom to top in sequence, and the control buttons (401) from top to bottom can control the linear module (102) to drive the feeding pipe (101) to slide rightward for a longer distance.

2. The sludge treatment device according to claim 1, characterized in that the feeding pipe (101) is slidably arranged on the centrifugal machine (1), and the feeding pipe (101) is provided with a connecting flange (103); and the linear module (102) is provided with a sliding block (104) connected with the connecting flange (103).

3. The sludge treatment device according to claim 1, characterized in that the control support (303) is provided with a driving push rod (402) for driving the displacement of the control buttons (401), and the driving push rod (402) is provided with a button plate (403) for mounting the control buttons (401).

4. The sludge treatment device according to claim 3, characterized in that the stirring barrel (3) is provided with a proximity switch (404) electrically connected with the driving push rod (402), and the proximity switch (404) is matched with the material taking barrel (501). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The stirring barrel (3) is provided with a liquid level switch (405) at the bottom, and the liquid level switch (405) is electrically connected with the driving push rod (402).

5. The sludge treatment device according to claim 4, characterized in that: The bottom of the material taking barrel (501) is provided with a discharging plate (601), and the two sides of the discharging plate (601) are symmetrically provided with guide rods (602) matched with the material taking barrel (501), and the guide rods (602) and the material taking barrel (501) are provided with second springs (603) therebetween.

6. The sludge treatment device according to claim 5, characterized in that: The material taking barrel (501) is provided with a guide plate (604) matched with the guide rod (602), the guide rod (602) is fixedly provided with a positioning plate (605) after penetrating the guide plate (604), and any positioning plate (605) is provided with a pull rope (606) connected with the button plate (403).

7. A method for using the sludge treatment device according to claim 6, characterized in that: The method is as follows: S1: the sludge is added into the stirring barrel (3), and then the stirring barrel (3) stirs the sludge to make the sludge uniformly mixed; S2: the lifting push rod (301) drives the material taking barrel (501) to descend, the material taking barrel (501) descends into the stirring barrel (3) to load the sludge into the material taking barrel, and then the lifting push rod (301) is reset upward to trigger the proximity switch (404); S3: the material taking barrel (501) is matched with the extrusion plate (502) during the upward lifting process, at this time, the liquid is placed above the extrusion plate (502), and the solid is separated below the extrusion plate (502), and the extrusion plate (502) slides upward to compress the first spring (503) due to the volume change of the solid; S4: the extrusion plate (502) drives the extrusion rod (504) to rise upward, so that the detection plate (505) is located upward, and the control button (401) corresponding to the height is corresponded; S5: the proximity switch (404) triggers the driving push rod (402) to act after a period of time, the control button (401) is abutted with the detection plate (505) to trigger the control button (401) at the corresponding position, and the control button (401) transmits the signal to the linear module (102) through the PLC controller to make the material injection pipe (101) displace a corresponding distance; S6: while the driving push rod (402) drives the button plate (403) to displace, the button plate (403) pulls the discharging plate (601) through the pull rope (606) to compress the second spring (603) to make the discharging plate (601) separate from the bottom of the material taking barrel (501), so that the solid particles below the extrusion plate (502) are discharged into the stirring barrel (3), and the liquid above is re-discharged into the stirring barrel (3) through the holes in the extrusion plate (502), and the detection plate (505) always remains at the position after abutting against the corresponding control button (401). S7: After the sludge treatment in the stirring barrel (3) is completed, the liquid level switch (405) is triggered to reset the driving push rod (402), at this time the detection plate (505) is out of contact with the control button (401) and is reset under the action of the first spring (503), preparing for the next detection.

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