Sedimentation tank and control method for the sedimentation tank

Abstract

The present invention provides a sedimentation tank that can accurately discharge the supernatant layer and automate the sedimentation separation process of raw material liquids containing food particles. [Solution] The sedimentation separation tank 100 comprises a separation tank body 1 for containing a raw material liquid A containing food particles, a detector 2 for detecting the height position of the interface IS between the sedimentation concentration layer L2 and the supernatant layer L1 of the separated raw material liquid A, a supernatant discharge pipe 4 having an outlet 43 that opens outside the separation tank body 1 and an inlet 44 that opens inside the separation tank body 1, a discharge pipe drive unit 5 for raising and lowering the inlet 44, and a controller 6. The controller 6 positions the inlet 44 at a predetermined initial position P1, obtains the height position of the interface IS, calculates a target position for the inlet 44 based on the obtained height position of the interface IS, and lowers the inlet 44 to the target position.

Description

Technical Field

[0001] The present invention relates to a sedimentation separation tank and a method for controlling the sedimentation separation tank.

Background Art

[0002] Among the steps of manufacturing jam, there is known a water tank used in the step of precipitating jam juice to discharge the supernatant liquid and cooling the jam juice (see, for example, Patent Document 1). This water tank includes a supernatant water discharge valve provided on the side surface for discharging the supernatant liquid.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, due to changes in the water content of the jam juice or changes in the amount of jam juice introduced into the water tank, the height position of the interface between the sedimentation and concentration layer and the supernatant layer of the jam juice changes. However, in the water tank described in Patent Document 1, when the interface is located above the supernatant water discharge valve, the concentrated liquid of the jam juice is discharged together with the supernatant water, and when the interface between the sedimentation and concentration layer and the supernatant layer is located below the supernatant water discharge valve, there is a problem that the proportion of the water content of the jam juice transported to the dehydrator responsible for the subsequent process increases.

Means for Solving the Problems

[0005] To solve the above problems, a sedimentation separation tank according to one aspect of the present invention comprises: a separation tank body for containing a raw material liquid containing food particles; a detector for detecting the height position of the interface between the sedimentation concentration layer and the supernatant layer of the sedimentation separated raw material liquid; a supernatant discharge pipe having an outlet opening outside the separation tank body and an inlet opening inside the separation tank body; a discharge pipe drive unit for raising and lowering the inlet; and a controller. The controller positions the inlet at a predetermined initial position, obtains the height position of the interface, calculates a target position for the inlet based on the obtained height position of the interface, and lowers the inlet to the target position.

[0006] This configuration allows for precise discharge of the supernatant layer and automates the sedimentation and separation process of the raw material liquid containing food particles.

[0007] To solve the above problems, a sedimentation separation tank control method according to one aspect of the present invention comprises: a separation tank body for containing a raw material liquid containing food particles; a detector for obtaining the height position of the interface between the sedimentation concentration layer and the supernatant layer of the sedimentation separated raw material liquid; a supernatant liquid discharge pipe having an outlet opening outside the separation tank body and an inlet opening inside the separation tank body; and a discharge pipe drive unit for raising and lowering the inlet, wherein the inlet is positioned at a predetermined initial position, the height position of the interface is obtained, a target position of the inlet is calculated based on the obtained height position of the interface, and the inlet is lowered to the target position.

[0008] This configuration allows for precise discharge of the supernatant layer and automates the sedimentation and separation process of the raw material liquid containing food particles. [Effects of the Invention]

[0009] The present invention has the effect of enabling precise discharge of the supernatant layer and automating the sedimentation separation process of raw material liquids containing food particles. [Brief explanation of the drawing]

[0010] [Figure 1] This is a front view showing an example of the configuration of a sedimentation separation tank according to an embodiment. [Figure 2] Figure 1 is a cross-sectional view AA showing an example of the configuration of a sedimentation separation tank. [Figure 3] This is an enlarged view of the front side of the AA cross-sectional view, which shows an example of the configuration of a sedimentation separation tank in Figure 1. [Figure 4] Figure 1 is a schematic diagram showing an example of the configuration of the supernatant liquid discharge pipe and discharge pipe drive unit of the sedimentation separation tank. [Figure 5] Figure 1 is a block diagram schematically showing an example of the configuration of the control system for the sedimentation separation tank. [Figure 6] Figure 1 is a flowchart illustrating an example of the operation of a sedimentation tank. [Figure 7] This graph shows an example of measurement data of the light reception intensity measured by the detection unit of the sedimentation separation tank in Figure 1. [Modes for carrying out the invention]

[0011] The embodiments will be described below with reference to the drawings. However, the present invention is not limited to the embodiments described below. Furthermore, throughout the following drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant descriptions thereof are omitted.

[0012] The functions of the elements disclosed herein can be performed using circuits or processing circuits, including general-purpose processors, dedicated processors, integrated circuits, ASICs (Application Specific Integrated Circuits), conventional circuits, and / or combinations thereof, configured or programmed to perform the disclosed functions. A processor is considered a processing circuit or circuit because it includes transistors and other circuits. In this disclosure, a circuit, unit, or means is hardware that performs the enumerated functions, or hardware programmed to perform the enumerated functions. The hardware may be hardware disclosed herein, or other known hardware that is programmed or configured to perform the enumerated functions. If the hardware is a processor, which is considered a type of circuit, then the circuit, means, or unit is a combination of hardware and software, and the software is used to configure the hardware and / or the processor.

[0013] Figure 1 is a front view showing an example of the configuration of a sedimentation tank 100 according to an embodiment. Figure 2 is a cross-sectional view AA showing an example of the configuration of the sedimentation tank 100. Figure 3 is an enlarged view of the front side portion of the cross-sectional view AA.

[0014] The sedimentation separation tank 100 is used in the sedimentation separation process of raw material liquid A, which is the raw material for food, in the food manufacturing process. Raw material liquid A contains food particles dispersed in the liquid. In this embodiment, raw material liquid A is bean paste, which is made by adding water to raw beans such as adzuki beans and boiling them until soft, crushing the boiled beans, and then soaking the crushed beans in water. As a result, raw material liquid A contains bean paste particles, which are solid matter, dispersed in water. In this embodiment, the sedimentation separation process is a solid-liquid separation process that utilizes the action of gravity. As shown in Figure 1, the sedimentation separation tank 100 comprises a separation tank body 1, a detector 2, a supernatant liquid discharge pipe 4, a discharge pipe drive unit 5, and a controller 6 (see Figure 5).

[0015] As shown in Figure 2, the separation tank body 1 is a container for holding the raw material liquid A and is formed in a box shape. The bottom surface 15 of the separation tank body 1 slopes downward from the back to the front. A recess 16 is formed in the front portion of the bottom surface 15 of the separation tank body 1. A concentrated liquid discharge pipe 14 is provided in the front portion of the recess 16. The concentrated liquid discharge pipe 14 is a pipe for discharging the concentrated raw material liquid A. Also, as shown in Figure 1, a transparent window 11 is provided on the front side of the separation tank body 1. The transparent window 11 is a vertically elongated window and extends over at least the scanning range R described later. The transparent window 11 is a light-transmitting plate fitted into a window frame 12, for example, a glass plate. The transparent window 11 can be used to visually check the water level inside the separation tank body 1. A through hole 17 (see Figures 1 and 4) is formed on the front side of the separation tank body 1 through which the supernatant liquid discharge pipe 4 is inserted.

[0016] As shown in Figures 2 and 3, after the raw material liquid A is stored in the separation tank body 1 and left to stand, the food particles settle, separating into a supernatant layer L1 with reduced food particles and a sedimentation concentration layer L2 containing a large amount of food particles. A horizontal interface IS is then formed between the supernatant layer L1 and the sedimentation concentration layer L2. The detector 2 is a device for detecting the height position of the interface IS. As shown in Figure 3, the detector 2 includes a detection unit 21, a detection unit lifting drive unit 24, a lower limit sensor 28, and an upper limit sensor 29.

[0017] The detection unit 21 is, for example, a photoelectric sensor. The detection unit 21 has a light source 22 that emits detection light and a light receiving unit 23. The detection light is, for example, laser light. The light receiving unit 23 outputs an electrical signal corresponding to the received intensity of the incident light.

[0018] The detection unit lifting drive unit 24 is a mechanism that moves the detection unit 21 up and down. The detection unit lifting drive unit 24 includes a motor 25, a pair of pulleys 26a and 26b, and a belt 27. The motor 25 is, for example, a stepping motor and is an actuator capable of controlling the rotational angle position. Of the pair of pulleys 26a and 26b, one pulley is the drive pulley 26a and the other pulley is the driven pulley 26b. The drive pulley 26a is attached above the transmission window 11 on the side surface of the separation tank body 1. The drive pulley 26a is connected to the drive shaft of the motor 25 via a speed reducer and rotates by the driving force of the motor 25. The driven pulley 26b is attached below the transmission window 11 on the side surface of the separation tank body 1. The drive pulley 26a and the driven pulley 26b are arranged in the vertical direction, and both have a rotation axis extending in the horizontal direction.

[0019] The belt 27 is an endless belt and is wound around the pair of pulleys 26a and 26b. As shown in FIG. 1, the belt 27 has a first portion 27a and a second portion 27b that connect the pair of pulleys 26a and 26b and extend. The first portion 27a extends in the vertical direction on the front side of the transmission window 11. The detection unit 21 is fixed to a predetermined position of the first portion 27a in a posture where the light source 22 and the light receiving unit 23 face the transmission window 11. The light source 22 can emit detection light in the horizontal direction toward the transmission window 11. The light receiving unit 23 can receive the reflected light reflected by the raw material liquid A located inside the transmission window 11.

[0020] When the motor 25 is driven, the belt 27 moves around the pair of pulleys 26a and 26b. As a result, the detection unit 21 moves up and down in a state where the light source 22 and the light receiving unit 23 face the transmission window 11. Further, by controlling the rotational angle position of the rotation axis of the motor 25, the detection unit 21 can be positioned at a position corresponding to the rotational angle position of the rotation axis of the motor 25 within a predetermined scanning range R between the pair of pulleys 26a and 26b. In this way, the detection unit lifting drive unit 24 moves the detection unit 21 up and down within the predetermined scanning range R. During the up and down movement, the state where the light source 22 and the light receiving unit 23 face the transmission window 11 outside the transmission window 11 is maintained.

[0021] The lower limit sensor 28 and the upper limit sensor 29 are, for example, proximity sensors and output detection signals. The lower limit sensor 28 is provided near the driven pulley 26b on the side surface of the separation tank body 1 and is fixed to the side of the first portion 27a of the belt 27. The lower limit sensor 28 detects the detection portion 21 located at the lower height position of the scanning range R. The upper limit sensor 29 is provided near the driving pulley 26a on the side surface of the separation tank body 1 and is fixed to the side of the first portion 27a. The upper limit sensor 29 detects the detection portion 21 located at the upper height position of the scanning range R. Thus, the lower limit sensor 28 and the upper limit sensor 29 are provided at positions corresponding to the scanning range R.

[0022] Figure 4 is a schematic diagram showing an example configuration of the supernatant discharge pipe 4 and the discharge pipe drive unit 5. As shown in Figure 4, the supernatant discharge pipe 4 is a pipe that forms a flow path for discharging the supernatant from the inside of the separation tank body 1 to the outside. The supernatant discharge pipe 4 is an L-shaped pipe with both ends open and bent in the middle. The opening at one end of the supernatant discharge pipe 4 is the inlet 44 through which the supernatant flows in, and the opening at the other end is the outlet 43 through which the supernatant is discharged. The inlet 44 opens inside the separation tank body 1. The portion extending from the inlet 44 to the bent portion is the oscillating portion 42. The portion extending from the bent portion to the outlet 43 is the horizontal portion 41. Thus, the oscillating portion 42 extends inside the separation tank body 1 in a direction intersecting the horizontal portion 41. In this embodiment, the oscillating portion 42 extends in a direction perpendicular to the horizontal portion 41. The horizontal section 41 is inserted through the through-hole 17 of the separation tank body 1. The outlet 43 opens outside the separation tank body 1. The horizontal section 41 is rotatably supported by a bearing 45 in the through-hole 17 and rotates in a circumferential direction about a pivot axis L that extends in a direction having a horizontal component. The bearing 45 maintains the watertightness of the separation tank body 1 and prevents the raw material liquid A stored in the separation tank body 1 from leaking out from between the supernatant liquid discharge pipe 4 and the through-hole 17. As the supernatant liquid discharge pipe 4 rotates in a circumferential direction about the pivot axis L, the oscillating section 42 oscillates in a circumferential direction about the pivot axis L between a first position A1 and a second position A2. The first position A1 is, for example, a position in which the oscillating section 42 extends vertically, and the inlet 44 is located higher than the outlet 43. The second posture A2 is, for example, a posture in which the oscillating part 42 extends horizontally, and the inlet 44 is located at a lower height than the inlet 44 in the first posture A1. For example, in the second posture A2, the inlet 44 is located at the same height as the outlet 43. In this way, the inlet 44 moves up and down due to the oscillating of the supernatant liquid discharge pipe 4.

[0023] The discharge pipe drive unit 5 oscillates the supernatant liquid discharge pipe 4 and raises and lowers the inlet 44. The discharge pipe drive unit 5 is a mechanism that includes, for example, an actuator 51 and a connecting link 54. The actuator 51 is, for example, a motor cylinder and includes a cylinder 52 fixed to the front side of the separation tank body 1 and a piston 53 that moves back and forth relative to the cylinder 52 by the driving force of the motor. The connecting link 54 is a link that connects the piston 53 and the supernatant liquid discharge pipe 4. One end of the connecting link 54 is fixed to the horizontal portion 41 of the supernatant liquid discharge pipe 4 and extends radially around the oscillation axis L. An elongated hole 55 extending radially around the oscillation axis L is formed at the other end of the connecting link 54. The actuator 51 and the connecting link 54 are connected by a pin 56. The pin 56 is inserted through the elongated hole 55 and fixed to the tip of the piston 53. When the actuator 51 extends, the connecting link 54 swings to one side in the circumferential direction around the pivot axis L, causing the supernatant liquid discharge pipe 4 to swing from the first position A1 towards the second position A2 shown by the dashed line in Figure 4. This causes the inlet 44 to descend. When the actuator 51 shortens, the connecting link 54 swings to the other side in the circumferential direction around the pivot axis L, causing the supernatant liquid discharge pipe 4 to swing from the second position A2 towards the first position A1. This causes the inlet 44 to rise. When the actuator 51 extends and shortens, the pin 56 is guided by the elongated hole 55 and moves inside the elongated hole 55 in the direction in which the elongated hole 55 extends.

[0024] Figure 5 is a block diagram showing the functional configuration of the sedimentation separation tank 100. As shown in Figure 5, the controller 6 has a functional configuration mainly consisting of hardware, comprising a control unit 61, a storage unit 62 connected to the control unit 61, and an input unit 63. The control unit 61 is also connected to a detection unit lifting drive unit 24, a discharge pipe drive unit 5, a lower limit sensor 28, and an upper limit sensor 29.

[0025] The control unit 61 is, for example, a computer and includes circuits such as a processor like an MPU or an integrated circuit like an ASIC. The memory unit 62 is a memory accessible from the control unit 61 and includes, for example, RAM and ROM. Of these, the RAM temporarily stores various data during calculations by the control unit 61. The ROM stores computer programs and data for various data processing. Therefore, the control unit 61 controls the operation of each part of the sedimentation tank 100 by executing computer programs while referring to the data stored in the memory unit 62. The input unit 63 is, for example, an operation button and receives instructions to continue operation, which will be described later, and outputs a signal corresponding to the received instruction.

[0026] The detection unit lifting drive unit 24 has a drive circuit electrically connected to a motor 25. The motor 25's operation is controlled by the control unit 61 via the drive circuit. The control unit 61 controls the height position of the detection unit 21 by controlling the rotational angle position of the motor 25.

[0027] The discharge pipe drive unit 5 has a drive circuit electrically connected to the actuator 51. The operation of the actuator 51 is controlled by the control unit 61 via the drive circuit. The control unit 61 controls the posture of the supernatant liquid discharge pipe 4 by controlling the position of the piston 53 of the actuator 51.

[0028] [Example of operation] Next, we will explain an example of the operation of the sedimentation separation tank 100.

[0029] Figure 6 is a flowchart showing an example of the operation of the sedimentation separation tank 100. In this example, the water content of the raw material liquid A introduced into the separation tank body 1 is, for example, 96 percent.

[0030] First, the control unit 61 causes the supernatant liquid discharge pipe 4 to assume a first position A1. As a result, the inlet 44 is positioned at the initial position P1 (step S1). Then, the control unit 61 determines whether or not an instruction to continue operation has been input to the input unit 63 (step S2), and waits until the input unit 63 accepts the instruction to continue operation (NO in step S2).

[0031] When the inlet 44 is in its initial position P1, the raw material liquid A is introduced into the separation tank body 1 through the inlet 13 by, for example, an operator, and is contained in the sedimentation separation tank 100. The amount of raw material liquid A introduced is adjusted so that the water level is lower than that of the inlet 44 in its initial position P1. Therefore, when the raw material liquid A is contained in the separation tank body 1, the supernatant discharge pipe 4 protrudes above the water surface of the raw material liquid A. After being left to stand for a predetermined time, the raw material liquid A separates into a supernatant layer L1 and a sedimentation concentration layer L2 below the supernatant layer L1, and an interface IS is formed between the supernatant layer L1 and the sedimentation concentration layer L2. The instruction to continue operation is input to the input unit 63 after the interface IS has been formed.

[0032] Then, when the control unit 61 determines that the input unit 63 has received an instruction to continue operation (YES in step S2), it executes an interface position acquisition process to acquire the height position of the interface IS (step S3). In the interface position acquisition process, the control unit 61 first lowers the detection unit 21 until the lower limit sensor 28 detects the detection unit 21. When the lower limit sensor 28 detects the detection unit 21, the control unit 61 then emits pulsed detection light from the light source 22. The detection light emitted from the light source 22 passes through the transmissive window 11 of the separation tank body 1 and is reflected by the food particles dispersed in the raw material liquid A. As a result, the reflected detection light is detected by the light receiving unit 23, and a light intensity signal is output from the light receiving unit 23. The control unit 61 relates the received light intensity signal to the current height position of the detection unit 21 and stores it as measurement data in the storage unit 62. Next, the control unit 61 moves the detection unit 21 upward by a predetermined distance, emits pulsed detection light from the light source 22 again, and repeatedly performs the process of relating the received light intensity signal with the current height position of the detection unit 21 and adding it to the measurement data for storage. As this process is repeatedly performed, the detection unit 21 moves upward and the upper limit sensor 29 detects the detection unit 21. When the upper limit sensor 29 detects the detection unit 21, the control unit 61 terminates the interface position acquisition process. In this way, the control unit 61 moves the detection unit 21 upward while emitting detection light from the light source 22 and acquires measurement data of the received light intensity over the scanning range R.

[0033] Figure 7 is a graph of an example of measurement data. Next, the control unit 61 calculates the height position of the interface IS based on the acquired measurement data. Incidentally, the content of food particles is higher in the sedimentation and concentration layer L2 than in the supernatant layer L1, and changes significantly at the interface IS. Therefore, as shown in Figure 7, the light reception intensity output from the light receiving unit 23 is higher in the sedimentation and concentration layer L2 than in the supernatant layer L1, and changes significantly at the interface IS. The control unit 61 calculates the height position of the interface IS based on the change in light reception intensity of the measurement data. For example, the control unit 61 may determine the height position of the interface IS as the height position at which the light reception intensity falls below a threshold.

[0034] Next, the control unit 61 calculates the target position of the inlet 44 based on the acquired height position of the interface IS (step S4). The target position is at the same height as the height position of the interface IS. The target position may be higher or lower than the interface IS by adding a correction value to the height position of the interface IS. Also, the target position of the inlet 44 is lower than the initial position P1.

[0035] Next, the control unit 61 rotates the supernatant discharge pipe 4, which is in the first position A1, toward the second position A2, thereby lowering the inlet 44 and positioning the inlet 44 at the target position (step S5). As a result, the inlet 44 is submerged in the raw material liquid A, and the supernatant liquid located above the inlet 44 flows into the inlet 44. The supernatant liquid that flows into the inlet 44 flows through the inside of the supernatant discharge pipe 4 toward the outlet 43 and is discharged from the outlet 43. As a result, the liquid mainly consisting of the supernatant liquid located above the inlet 44 is removed from the raw material liquid A, and the concentrated raw material liquid A located below the inlet 44 remains in the separation tank body 1. The water content of the raw material liquid A from which the supernatant liquid has been removed is, for example, about 83 percent.

[0036] The concentrated raw material liquid A is discharged through the concentrated liquid discharge pipe 14 and sent to the dewatering machine. The bottom surface 15 of the separation tank body 1 slopes downward from the back to the front, and the concentrated liquid discharge pipe 14 is provided in a recess 16 on the front side of the bottom surface 15, so that the concentrated raw material liquid A can be smoothly guided to the concentrated liquid discharge pipe 14 and discharged. The concentrated raw material liquid A, that is, the concentrated bean paste juice, is sent to the dewatering machine to be further dewatered and becomes raw bean paste. The moisture content of the raw bean paste dewatered in the dewatering machine is, for example, about 63 percent.

[0037] In this way, the sedimentation tank 100 accurately detects the height position of the interface IS between the supernatant layer L1 and the sedimentation concentration layer L2 based on measurement data, and by positioning the inlet 44 at a target position calculated based on the height position of the interface IS, it can accurately discharge the supernatant layer L1. Furthermore, the sedimentation separation process of the raw material liquid A can be automated.

[0038] Furthermore, in the sedimentation separation tank 100, the discharge pipe drive unit 5 causes the supernatant liquid discharge pipe 4 to oscillate, raising and lowering the inlet 44, so the raising and lowering of the inlet 44 can be easily performed with a simple configuration.

[0039] Furthermore, since the detector 2 is located outside the separation tank body 1, the detector 2 does not come into contact with the raw material liquid A. Therefore, it is advantageous from a hygienic standpoint and can prevent accidents of metal fragments contaminating food.

[0040] From the above description, many improvements and other embodiments of the present invention will be apparent to those skilled in the art. Therefore, the above description should be interpreted as illustrative only and is provided for the purpose of teaching those skilled in the art the best mode of carrying out the invention. The details of its structure and / or function can be substantially modified without departing from the spirit of the invention. [Explanation of symbols]

[0041] 1 Separation tank body 2 detectors 4. Supernatant drain pipe 5. Discharge pipe drive unit 6. Controller 21 Detection unit 43 Outlet 44 Inlet 61 Control Unit 100 sedimentation separation tank A Raw material liquid L1 Supernatant L2 Sedimentation and Concentration Layer IS interface

Claims

1. A separation tank body for containing a raw material liquid containing food particles, A detector for detecting the height position of the interface between the sedimentation concentration layer and the supernatant layer of the sedimentation separated raw material liquid, A supernatant liquid discharge pipe having an outlet opening outside the separation tank body and an inlet opening inside the separation tank body, A discharge pipe drive unit that raises and lowers the inlet, Equipped with a controller, The controller is, Position the inlet at a predetermined initial position, The height position of the interface is obtained, Based on the height position of the interface obtained, the target position of the inlet is calculated. A sedimentation separation tank that lowers the inlet to position it at the target location.

2. The sedimentation separation tank according to claim 1, wherein the discharge pipe drive unit causes the supernatant discharge pipe to oscillate in a circumferential direction about a pivot axis extending in a direction having a horizontal component, thereby raising and lowering the inlet.

3. The separation tank body has a light-transmitting window provided on the side of the separation tank body, The detector includes a detection unit having a light source that emits detection light and a light receiving unit that outputs a signal corresponding to the received intensity of the reflected light of the detection light, and a detection unit lifting drive unit that moves the detection unit up and down within a predetermined scanning range with the light source and the light receiving unit facing the transmissive window outside the transmissive window, The controller is, The detection unit is moved while emitting the detection light, and measurement data of the received light intensity over the scanning range of the reflected light received by the light receiving unit is acquired. The sedimentation separation tank according to claim 1, wherein the height position of the interface is calculated based on the measurement data.

4. A separation tank body for containing a raw material liquid containing food particles, A detector for obtaining the height position of the interface between the sedimentation concentration layer and the supernatant layer of the sedimentation separated raw material liquid, A supernatant liquid discharge pipe having an outlet opening outside the separation tank body and an inlet opening inside the separation tank body, A control method for a sedimentation separation tank comprising a discharge pipe drive unit for raising and lowering the inlet, Position the inlet at a predetermined initial position, The height position of the interface is obtained, Based on the height position of the interface obtained, the target position of the inlet is calculated. A method for controlling a sedimentation separation tank, which involves lowering the inlet to position it at the target location.

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