JP2014151276A - Vertical type solid-liquid separation machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vertical type solid-liquid separation machine in which cleaning process is automated, whereby manpower saving and unmanned operation can be achieved.SOLUTION: A vertical type solid-liquid separation machine 10 for carrying out solid-liquid separation comprises: a screw conveyor 12 which is rotatably supported in a cylindrical rotary bowl 11 rotatably supported onto an outer cylindrical case 13; a main velocity electric motor 22; a differential velocity electric motor 24; and a stock solution supply pipe 15 for supplying stock solution 17. The machine 10 is equipped with: a cleaning liquid supply device 26 for supplying cleaning liquid 9 to the stock solution supply pipe 15; and a cleaning execution device 30 which carries out a cleaning process C in which the cleaning liquid 9 is supplied to the stock solution supply pipe 15 by the cleaning liquid supply device 26, and the cleaning liquid 9 is discharged from at least one of a separated liquid discharge port 13a and a solid content discharge port 11c while the rotary bowl 11 and the screw conveyor 12 being rotated with a differential velocity generated by the differential velocity electric motor 24.

Description

  The present invention relates to a vertical solid-liquid separator equipped with a cleaning process execution device.

Conventionally, vertical solid-liquid separators are widely used where solid-liquid separation is required in centrifugal fields such as resin dehydration at chemical plants, recovery of catalysts and antioxidants, and classification of kaolin and titanium oxide. Has been.
The vertical solid-liquid separator stops the machine when the solid-liquid separation operation is completed, and then cleans the inside of the machine. This is because vertical solid-liquid separators are used for multi-purpose solid-liquid separation with the era of multi-product low-volume production in recent years. May be mixed into the product and cause problems. In order to solve this, solid content is removed by careful washing.
In this case, there is a problem that it takes too much time for the cleaning operation. For this reason, as a solution to such a problem, a vertical solid-liquid separator aimed at performing a cleaning operation in a short time is known (for example, see Patent Document 1).

JP 2003-80113 A (FIGS. 1-2)

  However, in recent years, the number of man-hours required for the cleaning operation performed by the operator operating the machine has increased, and further improvements in solid-liquid separation / cleaning efficiency and productivity of the vertical solid-liquid separator are required. Therefore, there is a need for technological innovation (innovation) that makes it possible to perform solid-liquid separation and cleaning with labor saving and nighttime unattended without being satisfied with the level of technology that current workers wash.

  Therefore, in order to save labor and unmanned vertical solid-liquid separators, the present invention allows machine operations by various operators such as solid-liquid separation / washing and start / stop of the vertical solid-liquid separator. It is an object of the present invention to provide a vertical solid-liquid separator equipped with a washing process execution device that can be reduced and operated at night.

A vertical solid-liquid separator (10) according to claim 1 is a cylindrical rotating bowl (11) rotatably supported by an outer cylinder case (13), and rotates in the rotating bowl (11). A freely supported screw conveyor (12), a main speed electric motor (22) for rotating the rotating bowl (11) and the screw conveyor (12) in the same direction, the rotating bowl (11) and the screw conveyor ( 12) a differential speed motor (24) for giving a differential speed to the rotational speed, and a stock solution supply pipe (15) for feeding a stock solution (17) into the rotating bowl (11),
The stock solution (17) is subjected to solid-liquid separation into a separation liquid (18) and a solid content (19), and the separation liquid (18) is discharged from a separation liquid discharge port (13a) provided at an upper portion thereof. (19) A vertical solid-liquid separator (10) for performing a solid-liquid separation step of discharging from a solid content outlet (11c) provided at a lower part, and a cleaning liquid (9 ) Is supplied to the stock solution supply pipe (15) by the cleaning liquid supply device (26), and the differential speed motor (24) is used to provide the differential speed. A cleaning step of discharging the cleaning liquid (9) from at least one of the separation liquid discharge port (13a) and the solid content discharge port (11c) while rotating the rotating bowl (11) and the screw conveyor (12). Washer performing (C) Execution unit (30), characterized by comprising a.

  The invention described in claim 2 is the vertical solid-liquid separator (10) according to claim 1, wherein the cleaning process execution device (30) is driven by the main speed motor (22). Execute the lower washing step (C2) in which the rotating bowl (11) and the screw conveyor (12) are rotated at a lower speed than the liquid separation step and the washing liquid (9) is discharged from the solid content outlet (11c). It is characterized by.

  Invention of Claim 3 is a vertical solid-liquid separator (10) of Claim 2, Comprising: The said washing | cleaning process execution apparatus (30) is the said lower part by the said main-speed electric motor (22). While rotating the rotating bowl (11) and the screw conveyor (12) at a higher speed than in the cleaning step (C2), the differential speed motor (24) increases the differential speed as compared with the lower cleaning step (C2). The upper cleaning step (C1) for discharging the cleaning liquid (9) from the separation liquid discharge port (13a) is performed.

  The invention described in claim 4 is the vertical solid-liquid separator (10) according to any one of claims 1 to 3, wherein the upper cleaning step (C1) and the lower cleaning are performed. The step (C2) is alternately repeated a predetermined number of times.

  The invention described in claim 5 is the vertical solid-liquid separator (10) according to any one of claims 1 to 4, wherein the solid-liquid separation step (B) is operated for a predetermined time. When the washing step (C) is finished operating for a predetermined time, the presence or absence of supply of the stock solution (17) is confirmed. If there is, the solid-liquid separation step (B) is performed again, In the middle of the solid-liquid separation step (B), the vertical solid-liquid separator (10) according to any one of claims 1 to 4, wherein the stock solution (17) is not supplied. The stock solution electric valve (6a) is closed and the washing step (C) is performed.

  According to the first aspect of the present invention, since the vertical solid-liquid separator is equipped with the cleaning process execution device that executes the cleaning process, the cleaning process can be automated. Full automation such as separation / washing and stopping becomes possible. Thereby, the vertical solid-liquid separator provided with the automatic washing | cleaning which can perform an unattended operation at night can be provided.

  According to the second aspect of the present invention, the lower washing process is performed by rotating the main-speed motor at a low speed, so that the centrifugal effect is suppressed, so that the solid content gathers in the lower part of the rotating bowl and the lower part can be washed. Moreover, solid content can be discharged | emitted from a solid content discharge port.

  According to the third aspect of the present invention, the upper cleaning process can be performed by rotating the main speed motor at a high speed, thereby obtaining a centrifugal effect on the upper part of the rotating bowl. Wash the upper half. Further, since the differential speed is made larger than that in the lower cleaning step, the screw conveyor can stir and clean the inside, and the cleaning liquid can be discharged from the upper separated liquid discharge port.

  According to the invention which concerns on Claim 4, the washing | cleaning process execution apparatus which performs a washing | cleaning process removes the solid content in a machine sufficiently by repeating an upper washing process and a lower washing process by predetermined times alternately, and is enough. It can be finished to cleanliness.

According to the fifth aspect of the present invention, even in a solid-liquid separation operation of a large amount of undiluted solution, a washing process can be provided in the solid-liquid separation operation of the day, and solid matter is prevented from adhering to the machine. Can be prevented.
In the middle of the solid-liquid separation process, if the stock solution is not supplied, the washing process can be performed and the machine can be automatically stopped by the machine-stopping process of the vertical solid-liquid separator. By adding, it is possible to save labor and unmanned vertical solid-liquid separators.

It is a front view which shows the vertical solid-liquid separator provided with the washing process execution apparatus. It is a functional block diagram of a vertical solid-liquid separator provided with a washing process execution device. It is a flowchart which shows a vertical solid-liquid separator provided with the washing | cleaning process execution apparatus. It is a chart figure showing each process. It is a chart figure which shows the schedule of the Example which concerns on embodiment, and shows each process.

A vertical solid-liquid separator including a cleaning process execution device according to an embodiment will be described in detail with reference to the drawings.
<Configuration of vertical solid-liquid separator>
As shown in FIG. 1, the vertical solid-liquid separator 10 has a vertical structure and uses a centrifugal effect (also referred to as centrifugal force) to separate a stock solution into a solid and a separated liquid. Machine.
The vertical solid-liquid separator 10 is a vertical solid-liquid separator 10 that includes a cleaning process execution device 30 that enables continuous solid-liquid separation processing and enables automatic cleaning.
In the vertical solid-liquid separator 10, an outer cylinder case 13 is integrally fixed to a gantry 14 serving as a base of a machine body. The outer cylinder case 13 is formed in a cylindrical shape so as to surround the cylindrical rotating bowl 11, and the rotating bowl 11 is rotatably supported. The rotating bowl 11 and the screw conveyor 12 are belt-driven by the main speed motor 22 and rotated in the same direction. Furthermore, the screw conveyor 12 is belt-driven by the differential speed motor 24 and rotated via the differential speed reducer 23. The screw conveyor 12 is rotatably supported coaxially with respect to the rotating bowl 11.

The stock solution supply pipe 15 is inserted from an intubation hole protruding into the center of the upper end plate of the cylindrical portion 11 b of the rotating bowl 11, and supplies the stock solution (also referred to as slurry) 17 to the position of the lower center in the screw conveyor 12.
Further, at the lower center of the screw conveyor 12, there is provided a flow dividing section 16 that uniformly distributes the stock solution 17 supplied by the stock solution supply pipe 15 by the flow dividing rib plate 16b.
Further, as shown in FIG. 1, the stock solution electric valve 6 a is disposed in the flow path for supplying the stock solution 17 to the stock solution supply pipe 15, and the optical sensor 4 for detecting the presence or absence of the stock solution 17 is disposed.
Therefore, the stock solution 17 is supplied by a pump of a stock solution storage tank (not shown), and is supplied to the stock solution supply pipe 15 in the rotating bowl 11 through the optical sensor 4 and the stock solution electric valve 6a.

The rotating bowl 11 is rotatably supported and surrounded in the outer cylinder case 13, and includes a lower tapered portion 11a, and a bent portion 11f of the tapered portion 11a to an upper cylindrical portion 11b.
Naturally, since the diameter differs depending on the shape of the lower tapered portion 11a and the upper cylindrical portion 11b of the rotating bowl 11, the centrifugal effect (centrifugal force) is greater in the cylindrical portion 11b than in the tapered portion 11a. Works greatly.

The screw conveyor 12 is formed with spiral upper screw blades 12 a and lower screw blades 12 b on the outer peripheral surface of the screw conveyor shaft, and is rotatably inserted in accordance with the shape of the rotating bowl 11 described above.
However, since the centrifugal effect varies depending on the difference in shape between the lower part and the upper part of the rotating bowl 11, the separation liquid 18 is directed upward with a large centrifugal force, overflows from above, and is discharged from the separation liquid discharge port 13a. The solid content 19 gathers in the lower part, is scraped downward by the lower screw blade 12b by the differential speed of the screw conveyor 12, and is discharged from the solid content discharge port 11c.
The cylindrical skirt 20 is connected to the outer cylinder case 13 by changing the material from rubber to a thin plate of SUS material. By changing the material of the skirt 20, the solid content 19 is less likely to adhere to the mirror-finished skirt 20, but the solid content 19 still adheres to the inner peripheral surface 20a.

<Cleaning liquid supply device>
The cleaning liquid supply device 26 is provided with a cleaning liquid supply port 8 for supplying a cleaning liquid (hereinafter referred to as cleaning water) 9 on the left side of the upper end of the stock solution supply pipe 15, and a cleaning liquid valve 6 b for supplying the cleaning water 9 in front of the cleaning liquid supply port 8. Is arranged. The washing liquid electric valve 6b may be a manual valve, but the flushing electric valve 6b is suitable. That is, the cleaning liquid supply device 26 is a device that includes the cleaning liquid valve 6b, the cleaning liquid supply port 8, the cleaning water 9, and the like.

<Solid-liquid separation by vertical solid-liquid separator>
As shown in FIG. 1, the main speed motor 22 is a large motor, for example, 2200 min ⁻¹ of high speed rotation, and rotates the rotating bowl 11 and the screw conveyor 12 in the same direction to give a centrifugal effect to the stock solution 17. As for the shape of the rotating bowl 11, the lower part is reduced in a taper shape and the upper part is formed in a cylindrical shape, and the cylindrical part 11d having a larger diameter has a greater centrifugal effect than the tapered part 11e.
The separation liquid 18 rises above the cylindrical portion 11d having a large centrifugal effect of the rotating bowl 11, overflows from above, and the separation liquid 18 is discharged from the separation liquid discharge port 13a.
Therefore, in order to scrape the solid content 19 downward, the rotation of the screw conveyor 12 is rotated by the differential speed motor 24 that gives the speed difference between the rotating bowl 11 and the screw conveyor 12 via the differential speed reducer 23. A rotation speed of 2190 min ⁻¹ is suitable, a differential speed of 10 min ⁻¹ is provided, and the lower screw blade 12 b is scraped out while stirring the inside.
That is, if the lower screw blade 12b is, for example, at a differential speed of 10 min ⁻¹ , the lower screw blade 12b moves downward by 10 pitches per minute, so the inside can be stirred. Further, the solid content 19 is conveyed downward, discharged from the solid content discharge port 11c, and falls to the tray 14b.
For example, if the reduction ratio is 150: 1, the differential speed reduction motor 23 may be a motor with an output of 1/150, and a motor with a small output can be used. In addition, although it is not easy to control the motor to 2199 rotations, which is slower by one rotation, it may be controlled to 2050 rotations, which is 150 rotations lower by way of the differential speed reducer 23, even if there is some variation in the number of rotations. Since the degree of influence is 1/150, there is a merit that there is no influence.

<Washing by vertical solid-liquid separator>
There are two types of cleaning, upper cleaning and lower cleaning. The cleaning process execution device 30 that executes cleaning alternately repeats the upper cleaning process C1 and the lower cleaning process C2 a predetermined number of times, for example, five times. .
<Upper cleaning>
The main speed motor 22 is preferably, for example, a high speed rotation of 1500 min ⁻¹ , and the rotational speed of the screw conveyor 12 with respect to the rotating bowl 11 is preferably a differential speed of 5 min ⁻¹ .
Thereby, the centrifugal effect is given to the upper part of the rotating bowl 11, and the upper part is washed.
Further, a large differential speed 10min ^-1, the intermediate differential gear 5min ^-1 with small differential speed 1min ^-1, perform stirring, to discharge the solids remaining.
<Lower cleaning>
The main speed motor 22 is, for example, a low speed rotation of 400 min ⁻¹ , and the rotational speed of the screw conveyor 12 with respect to the rotating bowl 11 is preferably a differential speed of 1 min ⁻¹ .
As a result, due to the low-speed centrifugal effect on the lower part of the rotating bowl 11, the cleaning liquid is dropped by the solid content discharge port 11c, and the solid content inside the screw conveyor 12 is washed away by the differential speed of 1 min ^{−1 and the} inside of the skirt is also cleaned.

<Washing process execution device>
The cleaning process execution device 30 is a device that executes the cleaning process C (see FIG. 3).
As shown in FIG. 2, the cleaning process execution device 30 stores a solid-liquid separation / cleaning program 311 stored in the storage unit 31 of the controller 3, and includes a timer 33 and a counter 34. The separation / cleaning processing unit 32 includes a cleaning processing unit 323 including an upper cleaning processing unit 323a and a lower cleaning processing unit 323b.
Further, the cleaning process execution device 30 includes a control panel 5 that controls the main speed motor 22, the differential speed reducer 23, the differential speed motor 24, and the like, and controls opening and closing of the cleaning liquid electric valve 6b and the like.

As shown in FIG. 1, the cleaning process execution device 30 supplies the cleaning liquid 9 to the stock solution supply pipe 15 and supplies the cleaning liquid 9 to the stock solution supply pipe 15 by the cleaning liquid supply device 26. It refers to an apparatus necessary for performing the cleaning process C (see FIG. 3) that rotates and discharges the cleaning liquid 9 from at least one of the separation liquid discharge port 13a and the solid content discharge port 11c.
Further, the cleaning process execution device 30 rotates the screw conveyor 12 at a large differential speed (for example, 5 min ⁻¹ ), and executes the upper cleaning process C1 for discharging the cleaning liquid 9 from the separated liquid discharge port 13a provided at the upper part. At the same time, the screw conveyor 12 is rotated at a small differential speed (for example, 1 min ⁻¹ ) to execute the lower cleaning step C2 for discharging the cleaning liquid 9 from the solid content outlet 11c provided in the lower portion.
Furthermore, the cleaning process execution device 30 that executes the cleaning process C alternately repeats the upper cleaning process C1 and the lower cleaning process C2 a predetermined number of times.

<Washing process of vertical solid-liquid separator>
As shown in FIG. 1, in the cleaning process execution device 30, when the concentrate liquid motor-operated valve 6a is closed, this time, the cleaning liquid motor-operated valve 6b is opened, and the cleaning water 9 is guided by the concentrate liquid supply pipe 15, and the flow dividing rib plate 16b. Is sprayed onto the screw blades 12a from the diverting part 16 to be diverted, and the dirt for one day is washed away.
As shown by the two-dot chain line in FIG.
That is, the solid content 19 concentrates on the outer periphery of the upper screw blade 12a and the lower screw blade 12b. Further, a solid content outlet 11 c for discharging the solid content 19 and an inner peripheral surface 20 a of the skirt 20.

Therefore, the cleaning process execution device 30 divides the rotating bowl 11 and the screw conveyor 12 into two parts, an upper part H and a lower part L, and sets the optimum rotational speed and a rotational speed of a small differential speed to the upper cleaning. The process C1 and the lower cleaning process C2 are alternately cleaned and repeatedly cleaned a predetermined number of times. If it is 20 minutes at a time, the predetermined number of times is preferably 5 times, for example. A cleaning method in which the cleaning time of 20 minutes at a time is added to complete the cleaning by one cleaning cannot exhibit the cleaning effect. As a result, it has been found that there is a problem in obtaining the desired degree of cleaning. In order to increase the degree of cleaning, it is preferable to repeat such a plurality of times. Here, by repeating the upper and lower alternately five times, the degree of cleaning increases and the cleaning effect can be guaranteed.
As described above, the cleaning operation in the cleaning process C by the vertical solid-liquid separator 10 provided with the cleaning process execution device 30 is fully automatic without human intervention. Moreover, although the washing water 9 changes with materials of the solid content 19, the industrial water and groundwater which do not contain chlorine are suitable, and the tap water from which chlorine was removed may be sufficient.

<Upper cleaning process C1>
As shown in FIG. 1, the upper part of the upper cleaning step means an upper part H (indicated by a two-dot chain line in FIG. 1) bordering on a cylindrical part 11d of the cylindrical bowl 11 and a bent part 11f of the tapered part 11e. .
Cleaning of the upper washing step C1, the rotation number N8 of the main speed electric motor 22, for example, a 1500min ^-1, the rotation number N7 of differential speed reduction ratio N11 of 5min ^-1 and the differential speed reducer 23 and 1/150 Then, the rotational speed N9 of the differential speed motor 24 becomes 750 min ⁻¹ , and the cleaning of the upper portion H is agitated and can be effectively cleaned. The washing water 9 is supplied from the washing liquid supply port 8, the rotational speeds of the rotating bowl 11 and the screw conveyor 12 are set to different speeds, and the solid content 19 and the washing water are fed from the separation liquid discharge port 13 a while stirring and washing the inside. 9 is discharged. In this case, both the solid content 19 and the washing water 9 are discharged from the separation liquid discharge port 13a.

<Lower cleaning step C2>
As shown in FIG. 1, the lower portion refers to a lower portion L having a cylindrical portion 11 d and a tapered portion 11 e of the cylindrical bowl 11 with a bent portion 11 f as a boundary.
The cleaning of the lower L · washing step C2, the rotational speed N4 of the main speed motor 22, for example, if 400 min ^-1 and the rotation number N6 of differential speed between 1min ^-1, rotational speed N5 of differential speed electric motor, for example 250 min ⁻¹ is preferred. If the centrifugal effect (centrifugal force) is weakened by the small number of rotations of the main speed motor 22, the lower portion L can be cleaned effectively. The washing water 9 is supplied from the washing liquid supply port 8, and both the solid content 19 and the washing water 9 are discharged from the solid content discharge port 11 c toward the skirt 20 while stirring and washing the inside by the differential speed. Further, the inner peripheral surface of the skirt 20 is also cleaned together.

<Configuration of vertical solid-liquid separator equipped with a cleaning process execution device>
FIG. 2 is a functional block diagram of the vertical solid-liquid separator.
The vertical solid-liquid separator 10 includes a display unit 1 that displays characters, figures, images, and the like, an input unit 2 that is input by a user operation, and a controller 3 that controls the vertical solid-liquid separator 10. ing.
The display unit 1 is composed of a liquid crystal monitor, for example, and displays characters, figures, images, and the like. The display unit 1 displays operation information and the like to the user.
The input unit 2 is provided on an operation panel (not shown), is input by a user operation, and outputs the input information to the controller 3.
The controller 3 controls the vertical solid-liquid separator 10 in an integrated manner. The controller 3 includes a storage unit 31 such as a flash memory, a solid / liquid separation / cleaning program 311, a solid / liquid separation / cleaning processing unit 32 (sequence / program execution means), a timer 33, a counter 34, and the like. Yes.
The storage unit 31 (storage means) stores one or a plurality of solid-liquid separation / cleaning programs 311. The solid-liquid separation / washing program 311 performs solid-liquid separation of the stock solution 17 to wash the vertical solid-liquid separator 10, performs automatic washing when a predetermined time has elapsed, and if the stock solution 17 is not supplied, The vertical solid-liquid separator 10 is automatically stopped after the automatic cleaning.

  For example, a CPU (Central Processing Unit) (not shown) executes the solid-liquid separation / washing program 311 of the vertical solid-liquid separator 10 to start the solid-liquid separation / washing processing unit 32.

The solid-liquid separation / cleaning processing unit 32 reads the steps of the solid-liquid separation / cleaning program 311 and executes them in order. First, the machine activation processing unit 321 that processes the machine activation, and the solid-liquid separation A solid-liquid separation processing unit 322 for processing the above, a cleaning processing unit 323 including an upper cleaning processing unit 323a and a lower cleaning processing unit 323b for processing cleaning, a machine stop processing unit 324 for processing a machine stop, and the like.
In addition, the timer 33 of the controller 3 measures a cleaning time performed at the end of the day, for example, 3 hours and 20 minutes, out of 24 hours a day. Further, the solid-liquid separation operation is performed until the timer 33 measures 20 hours and 40 minutes by subtracting 3 hours and 20 minutes from 24 hours of the day.
Further, it is counted whether the number of times of cleaning n reaches n = 5, and the cleaning operation is repeated until then.

  Furthermore, the vertical solid-liquid separator 10 controls the main speed motor 22, the differential speed reducer 23, the differential speed motor 24, and the opening and closing of each motor valve, and the control panel 5 for controlling the start / stop of the motor. It has.

The control panel 5 receives a command from the machine start processing unit 321, the solid-liquid separation processing unit 322, the cleaning processing unit 323 (upper cleaning processing unit 323a, lower cleaning processing unit 323b), or the machine stop processing unit 324, Through the differential speed reducer 23, a predetermined differential speed is given to a predetermined rotational speed set for the main speed motor 22, and the rotational speed of the differential speed motor 24 is changed to a lower rotational speed and controlled. To do.
The main speed motor 22 and the differential speed motor 24 are inverter controlled motors, and can be variable differential speed. Changes in the rotational speeds of the main speed motor 22 and the differential speed motor 24 are controlled by an inverter.
Further, the control panel 5 controls a stock solution electric valve 6a for supplying / blocking the stock solution 17 and a cleaning solution motor operated valve (flash motor valve) 6b for supplying / blocking the wash water 9.
Further, the control panel 5 starts and stops the oil unit 7a and the main power supply shut-off device 7b in response to an instruction to start and stop the motor, and also starts and stops the main speed motor 22 and the differential speed motor 24. .

The differential speed reducer 23 is a planetary gear mechanism that decelerates in two or more stages. The high speed axis and the low speed axis of the differential speed reducer 23 are on the same core and rotate in the same direction. The reduction ratio N11 is preferably 1/150.
The main speed motor 22 rotates the entire rotating bowl 11 and the screw conveyor 12 including the differential speed reducer 23 in the same direction, for example, at 2200 min ⁻¹ .
The differential speed gives a rotational difference only to the screw conveyor 12.
The output part of the screw conveyor 12 and the differential speed reducer 23 is connected inside, and a differential speed can be generated by decelerating the input shaft of the differential speed reducer 23.
The input shaft of the differential speed reducer 23 is driven by the differential speed motor 24. Further, there is a reduction ratio 1/150 between the input shaft of the differential speed reducer 23 and the output portion of the differential speed reducer 23, and the differential speed motor can be decelerated by the integral of the given differential speed and reduction ratio. .
For example, when the rotational speed of the main speed motor 22 is 2200 min ⁻¹ , the reduction ratio is 1/150, and the differential speed is 10 min ⁻¹ , the rotational speed of the differential speed motor 24 via the differential speed reducer 23 is 2200. − (150 × 10) = 700 min ⁻¹
Moreover, the rotation speed control of the electric motor by an inverter can change a rotation speed steplessly by the PAM system (Pulse Amplitude Modulation) which changes a voltage. In addition, there is another PWM method (Pulse Width Modulation) for controlling the output voltage by changing the current flow rate of the inverter that has been used in the past.

FIG. 4 is a chart for explaining the steps A to D.
As shown in FIG. 4, the process of the vertical solid-liquid separator 10 includes a machine start process of process A, a solid-liquid separation process of process B, a cleaning process of process C, and a machine stop process of process D. Has been.

<Machine startup process A>
FIG. 3 is a flowchart including a solid-liquid separation process and a cleaning process of the vertical solid-liquid separator.
As shown in FIG. 3, the operator presses the start button of the main power source of the vertical solid-liquid separator 10 and presses the automatic operation start button (S10). In addition, the operator activates a pump for a stock solution storage tank (not shown).
As a result, the solid-liquid separation / washing program 311 (see FIG. 2) of the storage unit 3 of the controller 3 is activated, and the oil unit 7a (FIG. 2) automatically supplies lubricating oil to the bearing portion of the vertical solid-liquid separator 10. Start) (S11), the main speed motor 22 is started (S12), and the differential speed motor 24 is started (S13).

<Step B of solid-liquid separation>
The solid-liquid separation step B is fully automated by a sequence program. The main speed motor 22 and the differential speed motor 24 are electric motors controlled by an inverter.
The rotation speed N1 of the main speed motor 22 is rotated at, for example, 2200 min ⁻¹ (S14). The rotational speed N2 of the differential speed motor 24 is rotated, for example, at 700 min ⁻¹ (S15). The rotational speed N3 of the differential speed at this time is 10 min ⁻¹ .
The stock solution electric valve (6a) is opened (S16).
Is there a supply of stock solution 17? If (S17) is detected by, for example, the optical sensor 4 such as a laser beam and “Yes” is present, the next solid-liquid separation operation (S18) is performed. If “No”, there is no solid-liquid separation operation (S18), and the stock solution electric valve 6a is closed (S20).
In the solid-liquid separation operation (S18), the stock solution 17 is supplied from the stock solution supply pipe 15. Then, the undiluted solution 17 supplied into the rotating bowl 11 is diverted by the diverting part 16 having the diverting rib plate 16b arranged uniformly on the inner wall of the rotating bowl 11. And it is made to flow into the rotating bowl 11, and the solid-liquid separation which isolate | separates the separation liquid 18 and the solid content 19 by the centrifugal effect is started. Then, the separation liquid 18 flows upward, overflows and is discharged from the separation liquid discharge port 13a, and the solid content 19 is discharged from the solid content discharge port 11c by scraping by the screw blade 12a and falls to the tray 14b.
Has a predetermined operating time (for example, 20 hours and 40 minutes shown in FIG. 5) passed? If “Yes” in (S19), the solid-liquid separation operation is once ended, and the stock solution electric valve 6a is closed (S20).

<Washing process C>
In the cleaning process C shown in FIG. 3, the cleaning process execution device 30 operates and performs automatic cleaning. The rotation speed of the rotary bowl 11 and the screw conveyor 12 of the vertical solid-liquid separator 10 is changed to an optimum rotation speed, and the cleaning operation is performed fully automatically by controlling the rotation speed.
By performing S21 to S30 of the flowchart shown in FIG. 3, a cleaning operation is performed, and labor saving of the vertical solid-liquid separator 10 and unmanned operation at night can be achieved.
As shown in FIG. 3, the cleaning liquid (flushing) motor operated valve 6b is opened (S21).
(Upper H / Washing process C1)
For example, the rotational speed of the main speed motor 22 is set to 1500 min ⁻¹ of the rotational speed N8 (S22), and the differential speed motor 24 is set to 5 min ⁻¹ of the differential speed 750 min ^{− of the} rotational speed N9. ^The rotational speed is set to ¹ (S23). The upper portion H is washed by the centrifugal effect (692G) due to the high speed rotation (S24). This cleaning time is measured, for example, for 20 minutes by the timer 33 (see FIG. 2).
(Lower L / Washing process C2)
For example, the rotational speed of the main speed motor 22 is set to 400 min ⁻¹ of the rotational speed N4 (S25), and the differential speed motor 24 is set to 1 min ⁻¹ of the differential speed N6 to 250 min ^{− of the} rotational speed N5. ^The rotational speed is set to ¹ (S26). Accordingly, the lower portion L is washed by the centrifugal effect (49G) due to the low speed rotation (S27). The washing time is preferably about 20 minutes by the timer 33 (see FIG. 2), for example.
Therefore, the required time for the cleaning time is 20 minutes × 10, which is 3 hours and 20 minutes.

In the cleaning of the upper H / cleaning step C1 and the lower L / cleaning step C2, the counter 34 (see FIG. 2) counts the number of cleanings n after the cleaning is one. When washing is completed, the number of washings n is counted, and has the number of washings n = 5? A calculation unit (not shown) calculates (S28) and determines. If “No”, the process proceeds to S22, and if “Yes”, the process of the next S29 is performed, and the cleaning liquid (flushing) motor-operated valve 6 is closed (S29).
The presence or absence of the stock solution 17 is detected by the optical sensor 4 (S30). If “Yes” is “Yes”, the process proceeds to the first (S14) of the solid-liquid separation step B, and “No” is “No”. ", The process proceeds to the machine stop step D.

Through the above-described cleaning step C, the solid content 19 accumulated in the machine is cleaned cleanly, and the solid content 19 is almost discharged outside the machine.
Further, as shown in FIG. 5, the cleaning time (3 hours and 20 minutes) of this cleaning operation is performed in a factory that is unattended at night when the worker returns home, but other time may also be used.

<Machine stop process D>
As shown in FIG. 3, the rotational speed of the differential speed motor 24 with respect to the rotational speed at which the differential speed is set to “0”, for example, 400 min ⁻¹ of the rotational speed N4 of the main speed motor 22 in response to a command from the sequence program. N10 is changed to 400 min ⁻¹ and rotated synchronously (S31).
The differential speed motor 24 is stopped by a command from the sequence program (S32).
The main speed motor 22 is stopped (S33).
The oil unit 7a is stopped (S34).
The main power supply of the machine body is shut off (S35).
As described above, the sequence program can achieve full automation over the machine starting process, the solid-liquid separation process, the cleaning process, and the machine stopping process.

FIG. 5 is a chart showing each step, showing the schedule of an embodiment in which the solid-liquid separation work and the washing work of the stock solution are performed assuming a solid-liquid separation work that requires 72 hours.
In addition, the exchange operation | work of the screw conveyor 12 accompanying a specification change is excluded from description here. In addition, the worker works at the factory from 8:00 to 18:00 in the morning, and the solid-liquid separation work in one day (24 hours) is set to 20 hours and 40 minutes after subtracting the washing time of 3 hours and 20 minutes.
<Day 1>
As shown in FIG. 5, an operator starts the main power source of the vertical solid-liquid separator 10 at 8:00 am (process A), operates the solid-liquid separation process (process B) for 20 hours and 40 minutes, The solid-liquid separation operation is temporarily terminated at 40 minutes, followed by a cleaning operation (step C) for 3 hours and 20 minutes, and the solid content 19 accumulated on that day is washed away by the cleaning step C, and the process ends at 8 o'clock in the morning.
<Day 2>
After the solid-liquid separation operation (step B) is operated for 20 hours and 40 minutes at 8:00 in the morning, the solid-liquid separation operation is once ended, and the cleaning operation (step C) is performed for 3 hours and 20 minutes.
<Day 3>
After the solid-liquid separation operation (step B) is operated for 20 hours and 40 minutes at 8:00 in the morning, the solid-liquid separation operation is once ended, and the cleaning operation (step C) is performed for 3 hours and 20 minutes.
<Day 4>
When the solid-liquid separator is started by automatic operation at 8:00 am and operated for 10 hours, when the signal of the supply of the stock solution 17 is received by the optical sensor 4, the solid-liquid separation operation (step B) is terminated, The process proceeds to the cleaning operation (process C).
Thus, the effect of this invention is that a continuous unattended operation is possible including a washing operation (process C). In addition, due to the cleaning operation (step C), the accumulation and adhesion of the solid content 19 of the day is removed within the day. Furthermore, when the supply of the stock solution 17 is completed in the middle, a cleaning operation (step C) is performed thereafter.

When the cleaning operation (step C) is completed, the differential speed motor 22 and the differential speed motor 24 are synchronously rotated with the differential speed between them being zero, and then the differential speed motor 24 is stopped by a switch circuit (not shown). Stops rotating 22 The oil unit 7a is stopped, the pump for the stock solution storage tank is stopped, and the main power is shut off by the main power shut-off device 7b of the vertical solid-liquid separator 10.
As a result, in the vertical solid-liquid separator 10 to which the automatic cleaning system is added, since the unmanned operation and the labor saving can be achieved by operating for 20 hours and 40 minutes a day, the operation rate is improved more than twice. In addition, since it is possible to stop the machine by automatically shutting off the machine, the worker can be absent. Accordingly, for example, the cost can be reduced by 14.0 H per day, 280 H per month, 280 H × 12 per year, and 3360 H per year.

The present invention can be modified and changed in various ways within the scope of the technical idea.
When the solid-liquid separation operation continues continuously every day, the solid-liquid separation / washing of the vertical solid-liquid separator 10 is repeated as Step A → Step B → Step C, Step B → Step C, Step B → Step C, Finally, step B → step C → step D may be performed. This solid-liquid separation / washing system can be used regardless of the size of the stock solution 17.
Furthermore, in the case of 24-hour unattended operation at night, if two sets of 12 hours of solid-liquid separation work for 10 hours and 20 minutes and washing work for 1 hour and 40 minutes are performed, the solid content of 19 Since there is less deposition, the solid content 19 can be washed away more strictly.
In addition, by operating this cleaning process C in an unmanned factory, the cost can be reduced by 792H at 66H on the 20th of the month and 66H × 12 per year.
The cleaning method by the cleaning process execution device of cleaning process C is an automatic cleaning system so that cleaning can be performed under optimum conditions, and it is performed at the end of the solid-liquid separation operation every day, so that the state of high cleaning degree is high. Can be maintained. Moreover, even if the stock solution is replaced, it can be started immediately. The newly developed vertical solid-liquid separator equipped with a cleaning process execution device is an automatic system that adds a machine start-up process, a cleaning process, and a machine stop process to the conventional solid-liquid separation process to achieve full automation.

DESCRIPTION OF SYMBOLS 1 Display part 2 Input part 3 Controller 4 Optical sensor 5 Control panel 6a Raw liquid motor operated valve 6b Cleaning liquid motor operated valve (flushing motor operated valve)
7a Oil unit 7b Main power shutoff device 8 Cleaning liquid supply port 9 Cleaning liquid (cleaning water)
DESCRIPTION OF SYMBOLS 10 Vertical solid-liquid separator 11 Rotating bowl 11a Taper part 11b Cylindrical part 11c Solid content discharge port (solid content discharge port)
11d Cylindrical part 11e Taper part 11f Bending part 12 Screw conveyor 12a Upper screw blade 12b Lower screw blade 13 Outer cylinder case 13a Separation liquid outlet (Separation liquid outlet)
13c, 14c Flange part 14 Base 14b Sampling pan 15 Stock solution supply pipe 16 Dividing part 16a Dividing rib plate 17 Stock solution (stock solution slurry)
18 Separating liquid 19 Solid (fine powder)
20 Skirt 20a Inner peripheral surface 22 Main speed motor 23 Differential speed reducer 24 Differential speed motor 26 Cleaning liquid supply apparatus 30 Cleaning process execution apparatus A Machine start-up process B Solid-liquid separation process C Cleaning process C1 Upper part (H) Cleaning process C2 Lower part ( L) Cleaning process D Machine stop process H Upper L Lower N1 Number of rotations of main speed motor (2200 min ⁻¹ )
Number of rotations of N2 differential speed motor (700 min ⁻¹ )
N3 Differential speed rotation speed (10min- ¹ )
N4 Main speed motor speed (400min ^-1 )
N5 Differential speed motor speed (250 min ⁻¹ )
N6 Differential speed (1 min ^-1 )
N7 Speed of differential speed (5 min ^-1 )
Number of rotations of N8 main speed motor (1500 min ⁻¹ )
Number of rotations of N9 differential speed motor (750 min ⁻¹ )
Number of rotations of N10 differential speed motor (400 min ⁻¹ )
N11 Differential speed reduction gear ratio (1/150)

Claims (5)

A cylindrical rotating bowl (11) rotatably supported by an outer case (13), a screw conveyor (12) rotatably supported in the rotating bowl (11), and the rotating bowl (11) And a main speed electric motor (22) for rotating the screw conveyor (12) in the same direction, a differential speed electric motor (24) for giving a differential speed to the rotational speed of the rotating bowl (11) and the screw conveyor (12), A stock solution supply pipe (15) for supplying a stock solution (17) into the rotating bowl (11),
The stock solution (17) is subjected to solid-liquid separation into a separation liquid (18) and a solid content (19), and the separation liquid (18) is discharged from a separation liquid discharge port (13a) provided at an upper portion thereof. A vertical solid-liquid separator (10) for performing a solid-liquid separation step of discharging (19) from a solid content outlet (11c) provided in the lower part,
A cleaning liquid supply device (26) for supplying a cleaning liquid (9) to the stock solution supply pipe (15);
The cleaning liquid supply device (26) supplies the cleaning liquid (9) to the stock solution supply pipe (15),
While rotating the rotating bowl (11) and the screw conveyor (12) with the differential speed provided by the differential speed motor (24), the cleaning liquid (9) is removed from the separation liquid discharge port (13a) and the solid content. A cleaning process execution device (30) for executing the cleaning process (C) for discharging from at least one of the discharge ports (11c);
A vertical solid-liquid separator (10) comprising: The cleaning process execution device (30)
The main-speed electric motor (22) rotates the rotating bowl (11) and the screw conveyor (12) at a lower speed than the solid-liquid separation step to discharge the cleaning liquid (9) from the solid content outlet (11c). Performing a lower cleaning step (C2),
The vertical solid-liquid separator (10) according to claim 1, characterized in that: The cleaning process execution device (30)
While rotating the rotating bowl (11) and the screw conveyor (12) at a higher speed than the lower washing step (C2) by the main speed motor (22), the lower washing step ( Performing the upper cleaning step (C1) for discharging the cleaning liquid (9) from the separation liquid discharge port (13a) by increasing the differential speed compared to C2).
The vertical solid-liquid separator (10) according to claim 2, characterized in that: The cleaning process execution device (30) that executes the cleaning process (C) includes:
The upper cleaning step (C1);
The lower washing step (C2);
The vertical solid-liquid separator (10) according to any one of claims 1 to 3, wherein the above is alternately repeated a predetermined number of times. When the solid-liquid separation step (B) is finished for a predetermined time and the washing step (C) is finished for a predetermined time, the presence or absence of the supply of the stock solution (17) is confirmed. While performing the solid-liquid separation step (B),
When the stock solution (17) is not supplied during the solid-liquid separation step (B), the stock solution motor-operated valve (6a) is closed and the washing step (C) is performed. The vertical solid-liquid separator (10) according to any one of claims 1 to 4.

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