JP2015187003A - Storage tank and operation method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and inexpensively agitate-mix a solid material precipitated or floating in response to operation stopping when resuming operation, in a tank for storing a solid material-containing liquid, in an operation method of a storage tank of the present invention.SOLUTION: An operation method of a storage tank 1 controls a liquid level so as to stop liquid reception to the tank 1 when rising up to a predetermined high liquid surface level HL and resume the liquid reception to the tank 1 when a liquid level in the tank 1 lowers up to a predetermined medium liquid surface level MDL in normal operation, and agitates a sandbag or its other solid material precipitated or floating in the tank 1 in operation stopping time by the liquid reception up to a high-high liquid surface level HHL by receiving liquid in the tank 1 up to the high-high liquid surface level HHL further higher than the high liquid surface level when resuming operation after stopping the operation for a predetermined time or more.

Description

  The present invention relates to a tank for storing sao or other solid-containing liquid and an operation method thereof.

  Conventionally, in tanks storing sao or other solid-containing liquids, during normal operation, when the liquid level in the tank drops to the medium liquid level, liquid reception resumes, and when the liquid level rises to the high liquid level. Although the liquid level is controlled so as to stop the liquid reception, the soot or other solid matter precipitated or suspended in the tank is mixed by stirring the liquid with the stirring blade ( Patent Documents 1 and 2).

  In addition, in a filler that fills a container with liquid of solid or other solid matter, the liquid in the filler tank is returned by returning the liquid in the filler tank to the storage tank from the return pipe attached to the filler tank while filling is stopped. A technique for preventing precipitation or other solid matter from precipitating or floating is disclosed (Patent Document 3).

Japanese Patent Publication No. 58-37161 (Fig. 1) Japanese Patent Laid-Open No. 10-338203 (FIG. 1) International Publication No. 2004/052770 (Figure 1)

According to the above-mentioned patent document 1, the liquid in the closed tank or other solid-containing liquid is supplied to the filling machine while being uniformly stirred and mixed by the stirring blade.
However, the technique of Patent Document 1 requires a stirring blade that is driven to rotate, which may increase the cost of the apparatus, and may require time for washing the stirring blade after the operation is completed. If there is a bearing or seal member for the rotating shaft of the rotor blade on the wall, gas or liquid may leak through the bearing or seal member in the case of liquid containing gas, and the bearing or seal in the case of sterile liquid. There is a fear that aseptic holding with the seal member is difficult.

Further, in the technique of Patent Document 2, a reflux pipe provided by connecting a pipe extending from the tank to the filling machine in front of the tank is connected to the tank, and the liquid is returned from the tank to the tank when the filling machine is stopped. In addition, it is supposed to prevent precipitation such as soot when the filling machine is stopped.
However, in the technique of Patent Document 2, a stirring blade is used in the tank, and there is a risk that the cost of the apparatus becomes expensive, and there is a risk that it takes time to clean the stirring blade after the operation is completed. Since there is a bearing or seal member for the rotary shaft of the rotor blade on the tank wall, there is a risk of leakage of gas or liquid through the bearing or seal member in the case of a liquid containing gas, and the bearing or seal in the case of a sterile liquid. There is a fear that aseptic holding with the seal member is difficult.

  Further, the technique of Patent Document 3 does not disclose a technique for stirring and mixing liquid soot or other solid matter precipitation or floating in the storage tank when the operation is resumed after the operation of the storage tank is stopped. When the operation is resumed, there is a risk that the liquid will be supplied to the filler while the solid or other solid matter is precipitated or suspended in the storage tank.

  In view of the above circumstances, the present invention facilitates the precipitation or other solid matter that has settled or floated with the suspension of operation when the operation is resumed in a tank that stores the liquid of the solid or other solid matter. A storage tank that can be stirred and mixed at low cost, is easy to clean after operation, and prevents leakage of gas or liquid, or maintains sterility even in the case of gas-filled or sterile liquid, and its operation method The purpose is to do.

The present invention solves the above problems by the following means.
(1) The operation method of the storage tank according to the first aspect of the present invention is the operation method of the tank for storing the liquid containing the solid or other solid matter. During normal operation, the liquid level in the tank is predetermined. The liquid level is controlled so that liquid reception is resumed when the liquid level is lowered to the medium liquid level, and liquid reception is stopped when the liquid level is raised to the predetermined high liquid level. When the operation is resumed later, the liquid is received in the tank up to a higher and higher liquid level than the high liquid level, and the soot or other solids settled or floated in the tank when the operation is stopped. The object is stirred by receiving liquid up to the high and high liquid level.

  (2) The operation method of the storage tank according to the second aspect of the present invention may be configured such that in the operation method of the storage tank, the liquid is received into the tank from below the tank.

  (3) In the operation method of the storage tank according to the third aspect of the present invention, in the operation method of the storage tank, the liquid may be gas-filled soot or other solid-containing liquid.

  (4) In the operation method of the storage tank according to the fourth aspect of the present invention, the liquid is sterile sago or other solid liquid.

  (5) The operation method of the storage tank of the fifth aspect of the present invention is the operation method of the storage tank, wherein the command from the operation control device is received when the liquid is received up to the high and high liquid level in the tank. Thus, the operation may be performed by opening / closing an electromagnetic opening / closing valve provided in the liquid pipe to the tank.

  (6) The operation method of the storage tank according to the sixth aspect of the present invention is the operation method of the storage tank, wherein when the liquid is received up to the high and high liquid level in the tank, the liquid pipe to the tank It may be performed by opening / closing operation of a manual opening / closing valve provided in the above.

  (7) The operation method of the storage tank according to the seventh aspect of the present invention is the operation method of the storage tank, wherein when the liquid is received up to the high and high liquid level in the tank, the high and high liquid level When the float ball provided at a position corresponding to the high and high liquid level in the tank detects the high and high liquid level, the manual on-off valve is closed to return to the tank. The liquid reception may be stopped.

  (8) A storage tank according to an eighth aspect of the present invention is a tank for storing a liquid containing a solid or other solid matter, a liquid level meter capable of detecting a medium liquid level and a high liquid level, and A high and high liquid level meter capable of detecting a higher and higher liquid level than the high liquid level, a liquid supply on-off valve for the tank provided in a liquid pipe to the tank, and the liquid level meter And a control device that controls the liquid level in the tank based on the signal from the liquid level. During normal operation, the liquid level is detected when the liquid level is detected by the liquid level meter, and the liquid level is reduced. When the liquid level is controlled so that the liquid reception is stopped when the liquid level is increased to the high liquid level, the opening / closing valve is opened to resume the operation after the operation is stopped for a predetermined time or more. The liquid is received in the tank up to a level. As put, characterized in that cheat constituting the control device.

  (9) The storage tank according to the ninth aspect of the present invention may be provided with a liquid receiving port below the tank in the storage tank.

  (10) A storage tank according to a tenth aspect of the present invention is the storage tank, wherein the high and high liquid level meter includes a float ball using buoyancy due to the liquid, and a high and high liquid level detection of the float ball. It is good also as a structure with the float mechanism which outputs the signal for the closing operation of the said on-off valve, or the mechanism operation for closing operation.

  In the present invention according to the embodiment 1 or 8, in normal operation, when the liquid level in the tank is lowered to the middle liquid level, the liquid reception into the tank is resumed, and when the liquid level is raised to the high liquid level, The liquid level is controlled so that the liquid reception is stopped, and when the operation is resumed after being stopped for a predetermined time or longer, the liquid is received in the tank up to a higher and higher liquid level higher than the high liquid level, and the operation is stopped. Sometimes, it is possible to reduce the stirring and mixing of the liquid at the time of resuming the operation by mixing or stirring the suspended or suspended solids or other solid matter in the tank by receiving the liquid up to the high and high liquid level. It has the effect that it is efficient and does not require much time for cleaning after the operation.

  In the storage tank and the operation method thereof according to Embodiments 1 and 8, the present invention according to Embodiments 2 and 9 is such that the liquid is received from below the tank, so that the stirring and mixing by liquid reception is efficient. Has the effect of being performed automatically.

  In the operation method of the storage tank according to the embodiment 1 or 2, when the present invention related to the embodiment 3 is intended for a gas-filled soy or other solid-containing liquid, In order to rotate the agitating blade in the tank by passing the bearing and the seal member from the inside of the tank to the outside, the gas or liquid is transferred from the bearing and the seal member to the outside by the high pressure in the tank. Although there is a large risk of leakage, the technique of the present invention has the effect that there is no such risk.

  In the operation method of the storage tank according to the embodiment 1 or 2, when the present invention according to the embodiment 4 is directed to a sterile paddle or other solid-containing liquid, Since the rotating shaft is passed through the bearing and the seal member from the inside of the tank to the outside and the stirring blade is rotated in the tank, there is a risk that aseptic holding is difficult, but according to the technique of the present invention, there is no such effect. Have.

  The present invention according to the embodiment 5, 6, 7 or 10 is the storage tank according to any of the embodiments 1 to 4, 6 or 8, 9 and the operation method thereof, when the operation is resumed after the operation is stopped for a predetermined time or more. Accepting liquid up to high and high liquid level in the tank by opening / closing operation of the electromagnetic on-off valve provided in the liquid piping to the tank according to the command from the operation control device, or manual on-off valve In addition, the manual on-off valve closing operation at the time when the high and high liquid level is reached is performed by a float ball provided at a position corresponding to the high and high liquid level in the tank. By detecting the high and high liquid levels and closing the manual open / close valve accordingly, it is easy to accept and stop receiving liquid up to high and high liquid levels. An effect that can be selected for operation method depending on the application.

It is the front view which showed typically the storage tank concerning 1st embodiment of this invention. It is the front view which showed typically the storage tank concerning 2nd embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

(First embodiment of the present invention)
A first embodiment of the present invention will be described with reference to FIG.
FIG. 1 is a front view schematically showing a storage tank according to the first embodiment of the present invention.
In FIG. 1, a storage tank (hereinafter, the storage tank may be simply referred to as a tank) 1 is a liquid filled with sausage or other solid material (hereinafter, liquid filled with sausage or other solid material is simply referred to as a liquid). A tank (which may be referred to as “reserved”) from the upstream via a solenoid (opening / closing valve 6) by a pipe (liquid pipe) P1 in the direction of the arrow Y1 and via a liquid receiving port 5 provided below the storage tank 1. Upon receiving the supply, the internal liquid level is detected by the liquid level meter 4 (hereinafter, the detection may be referred to as measurement) and input to the control device 9, and the stored liquid is stored in the storage tank. 1 is supplied to the liquid filling machine 8 in the direction of the arrow Y2 through the pipe P by the pump 7 via the pipe P2.

  Further, when the tank 1 is measured during normal operation by the liquid level meter 4 to have reached a predetermined intermediate liquid level MDL, a measurement signal of the intermediate liquid level MDL is input to the control device 9 and controlled. A command is issued from the device 9 to open the electromagnetic on-off valve 6, and the liquid is supplied into the tank 1 from the pipe P 1 through the liquid receiving port 5, and a predetermined high liquid level is obtained by the liquid level meter 4. When it is measured that the level HL has been reached, a measurement signal of the high liquid level HL is input to the control device 9, and a command is issued from the control device 9 to close the electromagnetic on-off valve 6 and the tank 1 Liquid level control is performed so that the liquid supply to the inside is stopped.

  Here, when the operation of the storage tank 1 is stopped for a predetermined time or longer, the electromagnetic on-off valve 6 is opened by an operation from an operation panel (operation control device) (not shown) when the operation is resumed. The liquid level is supplied until the liquid level reaches a high high liquid level HHL which is higher than the high liquid level HL. A measurement signal of the liquid level HHL is input to the control device 9, and a command for closing the electromagnetic on-off valve 6 is issued from the control device 9 to stop the liquid supply into the storage tank 1. ing. That is, in the present embodiment, the liquid level meter 4 also serves as a high and high liquid level meter that can detect the high and high liquid level HHL.

Next, the operation of the storage tank 1 according to the first embodiment of the present invention will be described.
When the operation of the tank 1 is stopped for a predetermined time or more, the liquid soot or other solid matter in the tank 1 precipitates or floats.
When the liquid in the tank 1 is supplied to the liquid filling machine 8 by the operation of the pump 7 while the operation is resumed, the liquid supplied to the liquid filling machine 8 immediately after the operation is resumed is Sano or other solid matter. In this case, there is a problem that the variation of the ratio of the soot or other solid matter in the container filled with the liquid by the liquid filling machine 8 is increased.

Therefore, when the operation is resumed, the electromagnetic on-off valve 6 is opened by an operation from an operation panel (not shown), and liquid is supplied until the liquid level in the tank 1 reaches the high and high liquid level HHL. The soot or other solid matter precipitated or suspended in the liquid is agitated by the supply of the liquid, and the liquid soot or other solid matter in the tank 1 is uniformly mixed.
In this way, the mixing or homogenization of the precipitated or suspended solid or other solid matter can be easily performed by stirring and mixing the liquid itself by supplying the liquid from below the tank 1.

In the first embodiment of the present invention, when the above-described explanation or other solid-containing liquid is a gas-containing liquid, the rotation of the stirring rotor blade used in the conventional case is performed. The shaft does not penetrate from the tank to the outside, and therefore there is no bearing for the rotating shaft, no seal member, etc., so there is a concern of liquid leakage from the bearing, seal member, etc. due to gas pressure in the tank, gas leak Not convenient.
Furthermore, in the case of the above-described explanation or other solid-containing liquids are sterile liquids, special measures for maintaining sterility in the bearings, seal members, etc. are required in the same manner as the gas-containing liquids. Not convenient.

(Second embodiment of the present invention)
Next, a second embodiment of the present invention will be described with reference to FIG.
FIG. 2 is a front view schematically showing a tank according to the second embodiment of the present invention.
In FIG. 2, the same components as those of the tank described above with reference to FIG.
In FIG. 2, a tank 11 is a tank that stores liquid with sago or other solid matter, and when it is measured during normal operation that the liquid level level meter 14 has reached a predetermined medium liquid level MDL, A measurement signal of the intermediate liquid level MDL is input to the control device 19, and a command is issued from the control device 19 to open the electromagnetic on-off valve 6, and the liquid is supplied from the pipe P 1 through the liquid receiving port 5. When it is supplied into the tank 11 and measured by the liquid level meter 14 to reach a predetermined high liquid level HL, a measurement signal of the high liquid level HL is input to the control device 19, and the control device 19 performs electromagnetic switching. The liquid level control is performed so that a command is issued to close the valve 6 and the liquid supply into the tank 11 is stopped.

The pipe P1 is provided with an electromagnetic opening / closing valve 6, and the bypass piping P11 of the pipe P1 is provided with a manual opening / closing valve 16.
In addition, a float ball 15R with a lever that swings between a two-dot chain line and a solid line in the figure is provided at the upper part of the tank 11 as a high / high liquid level meter, and the float ball 15R is connected to the tank 11. When the liquid level inside is below the high liquid level HL, it is at the position indicated by the two-dot chain line in the figure, and comes into contact with the liquid and starts to float by the buoyancy of the float ball 15R, and the liquid level reaches the high and high liquid level HHL. Then, it floats as shown by the arrow F in the figure and rises to the position shown by the solid line in the figure. When the operation of the float ball 15R is transmitted to the float mechanism 15, the float ball 15R reaches the position shown by the solid line in the figure. The lever 15L closes the manual opening / closing valve 16 via the float mechanism 15.
The opening / closing operation of the manual opening / closing valve 16 is performed manually, and the closing operation is performed by operating the lever 15L via the float mechanism 15 or manually. When the manual opening / closing valve 16 is opened, the electromagnetic opening / closing valve 16 6 is closed, the signal of the liquid level meter 14 is turned off in the control device 19, and when the manual on-off valve 16 is closed, the electromagnetic on-off valve 6 can be opened and closed, and the signal of the liquid level meter 14 is transferred to the control device. 19 is configured to be in an ON state.

Next, the operation of the tank 11 according to the second embodiment of the present invention will be described.
When the operation of the tank 11 is stopped for a predetermined time or longer, when the operation is resumed, the manual on-off valve 16 that has been closed is manually opened, so that the electromagnetic on-off valve 6 is closed by a command from the control device 19. When the liquid is supplied into the tank 11 by the pipe P1 and the bypass pipe P11 through the liquid receiving port 5, and the liquid level in the tank 11 reaches the high and high liquid level HHL, the float ball 15R is shown in FIG. The manual open / close valve 16 is closed by the operation of the lever 15L via the float mechanism 15 and the electromagnetic open / close valve 6 can be opened and closed, and the signal of the liquid level meter 14 is ON. It becomes.

  By supplying the liquid up to the high and high liquid level HHL described above to the tank 11, the soot or other solid matter precipitated in the liquid in the tank 11 is stirred and mixed by the liquid supply. The liquid in the tank 11 or other solid matter is uniformly dispersed. Thereafter, the liquid in the tank 11 is supplied to the liquid filling machine 8 by the operation of the pump 7, whereby the liquid in the tank 11 is supplied. The surface gradually descends, and as the float ball 15R descends to the position of the two-dot chain line shown in FIG. 2, the manual on-off valve 16 is closed and the electromagnetic on-off valve 6 is in an openable state. The liquid level in the tank 11 is controlled between the high liquid level HL and the intermediate liquid level MDL by the liquid level meter 14.

In this manner, mixing and homogenization of the soot or other solid matter that has settled or suspended in the liquid in the tank 11 can be easily performed by stirring and mixing the liquid itself by supplying the liquid from below the tank 11. However, when the operation is restarted, the operator often operates while looking at the state of the tank 11 near the tank 11, and in the second embodiment of the present invention, the liquid up to the high and high liquid level HHL is obtained. Supply can be performed by an opening operation by manual operation of a manual opening / closing valve 16 provided in the vicinity of the tank 11, and the manual opening / closing valve 16 is operated by the operation of the float ball 15 </ b> R and the operation of the lever 15 </ b> L via the float mechanism 15. Since it can be closed, an operator's operation becomes easy.

1, 11 Tank 4, 14 Liquid level meter 5 (Tank) liquid receiving port 6 Electromagnetic on-off valve 9, 19 Control device 15 Float mechanism 15R Float ball 16 Manual on-off valve HHL High high liquid level HL High liquid level MDL Medium liquid level P1 Liquid (supply) piping P11 Bypass piping

Claims (10)

In the operation method of the tank storing the liquid containing sao or other solid matter,
During normal operation, when the liquid level in the tank drops to a predetermined medium liquid level, the liquid reception to the tank is resumed, and when the liquid level rises to a predetermined high liquid level, the liquid reception to the tank is stopped. To control the liquid level,
When the operation is resumed after the operation is stopped for a predetermined time or more, the liquid is received in the tank up to a high liquid level higher than the high liquid level, and the liquid that has settled or floated in the tank when the operation is stopped. A method for operating a storage tank, characterized in that a solid or other solid matter is agitated by receiving liquid up to the high and high liquid level. In the operation method of the storage tank according to claim 1,
A method for operating a storage tank, wherein the liquid is received from the lower side of the tank. In the operation method of the storage tank according to claim 1 or 2,
A method for operating a storage tank, wherein the liquid is a gas-filled saury or other solid-containing liquid. In the operation method of the storage tank according to claim 1 or 2,
A method for operating a storage tank, characterized in that the liquid is aseptic liquid or other solid-containing liquid. In the operation method of the storage tank according to any one of claims 1 to 4,
When receiving the liquid up to the high and high liquid level in the tank, the operation is performed by opening / closing operation of an electromagnetic on-off valve provided in a liquid pipe to the tank according to a command from an operation control device. How to operate the storage tank. In the operation method of the storage tank according to any one of claims 1 to 4,
A method for operating a storage tank, wherein the liquid is received into the tank up to the high and high liquid level by an opening / closing operation of a manual opening / closing valve provided in a liquid pipe to the tank. In the operation method of the storage tank according to claim 6,
When the liquid is received up to the high and high liquid level in the tank, a float ball provided at a position corresponding to the high and high liquid level in the tank when the high and high liquid level is reached. A method for operating a storage tank, wherein the manual open / close valve is closed to detect liquid supply to the tank by detecting the high / high liquid level. In tanks that store sao or other solid liquids,
A medium level, a liquid level meter capable of detecting a high liquid level, and a high / high liquid level meter capable of detecting a high / high liquid level higher than the high liquid level,
An on-off valve to the tank provided in a liquid pipe to the tank;
A controller for controlling the liquid level in the tank based on a signal from the liquid level meter, and
During normal operation, the liquid level control is performed so that the liquid level is detected when the liquid level is detected, and liquid reception is resumed when the liquid level is lowered to the middle liquid level, and liquid reception is stopped when the liquid level is raised to the high liquid level. The control device is configured to open the on-off valve to receive the liquid into the tank up to the high and high liquid level when the operation is resumed after the operation is stopped for a predetermined time or more. Storage tank. The storage tank according to claim 8,
A storage tank, wherein a liquid receiving port is provided below the tank. The storage tank according to claim 8 or 9,
The high and high liquid level meter, a float ball using buoyancy by the liquid,
A storage tank comprising a float mechanism that outputs a closing operation signal of the on-off valve or a closing operation mechanism operation by detecting a high and high liquid level of the float ball.

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