JP5625132B1 - Liquid feeding method and liquid feeding device for residual liquid - Google Patents

Abstract

The present invention provides a residual liquid feeding method and a liquid feeding apparatus capable of avoiding an increase in time required for liquid pumping and collecting a residual liquid in a pipe. SOLUTION: A first tank including a preparation tank 2 for preparing a chemical solution, a storage tank 3 to which the chemical solution is fed from the preparation tank 2, a rising pipe 12, an upstream pipe 11, and a downstream pipe 13 extending in a vertical direction. The pipe 10, the upstream pipe 11 and the downstream pipe 13 are connected, the second pipe 20 having a smaller diameter than the first pipe 10, the first valve 31 provided in the rising pipe 11, and the upstream pipe 11. When the chemical solution stored in the preparation tank 2 reaches the predetermined amount with the second valve 32, the first valve 31 is closed to cause the residual liquid in the rising pipe 12 to stay in the upstream pipe 11. By pressurizing the inside of the preparation tank 2 with the valve 31 and the second valve 32 closed, the residual liquid is sent to the storage tank 3 via the second pipe 20 and the downstream pipe 13. [Selection] Figure 1

Description

  The present invention relates to a residual liquid feeding method and a liquid feeding apparatus, and is particularly useful for feeding residual liquid in a pipe connecting a first tank and a second tank.

  In a plant that processes beverages, liquid pharmaceuticals, etc., a preparation tank, a storage tank, and a filling machine are each connected by piping, and compressed air of a predetermined pressure is supplied into the piping from the preparation tank through the storage tank. Liquid products are pumped to the filling machine.

  In many plants, the preparation tank, storage tank and filling machine are located on the same floor. The pipe connecting the tanks arranged in this way is not necessarily arranged in a straight line in the horizontal direction, and may be installed as a rising pipe rising upward from the preparation tank.

  When the liquid product continues to be pumped and the inside of the preparation tank becomes empty, the pumping is stopped. However, the entire amount of the liquid product cannot be pumped to the filling machine, and a part of the liquid product remains in the middle of the pipe. That is, the liquid product that has circulated through the rising pipe when the pumping is stopped remains in the rising pipe or upstream thereof. For this reason, a technique has been proposed in which the liquid product remaining in the pipe is fed from the pipe and appropriately recovered (see, for example, Patent Document 1). According to the technology according to Patent Document 1, the residual liquid generated in the rising pipe can be recovered by being pumped downstream with pressurized air.

  However, when the residual liquid in the rising pipe is pumped with pressurized air, the pressurized air passes through the residual liquid and reaches the upper side of the rising pipe. In this way, it is difficult to pump the residual liquid even if high-pressure pressurized air is used. On the other hand, by reducing the diameter of the rising pipe, it is conceivable that the pressurized air can be suppressed by suppressing the pressurized air from escaping the residual liquid. However, if the diameter of the rising pipe is reduced, the time required to pump the liquid product from the preparation tank to the filling machine increases.

Japanese Patent No. 5205158

  The present invention has been made in view of the above circumstances, avoids an increase in the time required for liquid pumping, and recovers the residual liquid in the pipe and recovers the residual liquid. The purpose is to provide.

A first aspect of the present invention that solves the above problems is a first tank, a second tank, a pipe that connects the first tank and the second tank, and a rising pipe that extends in the vertical direction. A first pipe including an upstream pipe on the first tank side from the rising pipe, a first pipe including a downstream pipe on the second tank side from the rising pipe, and a pipe connecting the upstream pipe and the downstream pipe, Residual liquid feeding in a liquid feeding device that includes a second pipe having a smaller diameter than the first pipe and a first valve provided in the rising pipe and sends liquid from the first tank to the second tank. In the method, when the first valve is opened, liquid is fed from the first tank to the second tank, and when the liquid stored in the first tank reaches a predetermined amount, the first tank Closing the valve Residual liquid in the rising pipe is retained in the upstream pipe, and the first tank is pressurized while the first valve is closed, so that the residual liquid is passed through the second pipe and the downstream pipe. There is a method for feeding a residual liquid, characterized in that the liquid is fed to two tanks.

  In the first aspect, in normal liquid feeding, liquid feeding can be performed without increasing the time required for chemical liquid feeding, and the remaining chemical liquid can be more reliably recovered via the second pipe. Can do.

According to a second aspect of the present invention, in the method for feeding a residual liquid according to the first aspect, the upstream pipe is provided with a second valve, and the second pipe is the second pipe of the upstream pipe. The first tank and the second valve are connected to the first tank side of the valve, and the liquid stored in the first tank is fed from the first tank to the second tank in a state where the first valve and the second valve are opened. When the predetermined amount is reached, the first valve is closed to cause the residual liquid in the rising pipe to stay in the upstream pipe, and after the second valve is closed, the inside of the first tank is pressurized. The residual liquid is sent to the second tank via the second pipe and the downstream pipe.

  In the second aspect, by closing the second valve during the residual liquid treatment, the liquid staying in the upstream pipe is prevented from reaching the rising pipe, and the staying liquid is more quickly transferred to the second pipe. Can flow in.

According to a third aspect of the present invention, in the method for feeding a residual liquid according to the first aspect, the upstream pipe is provided with a second valve, and the second pipe is the second pipe of the upstream pipe. The liquid connected to the rising pipe side from the valve and pumped from the first tank to the second tank with the first valve and the second valve opened, and the liquid stored in the first tank is in place. When reaching a fixed amount, the first valve is closed to cause the residual liquid in the rising pipe to stay in the upstream pipe, and the second valve is kept open, and the inside of the first tank is maintained. The residual liquid feeding method is characterized by feeding the residual liquid to the second tank through the second pipe and the downstream pipe by pressurization.

  In the third aspect, since the second pipe is connected to the downstream side of the second valve of the upstream pipe, the remaining of the liquid can be avoided, and more liquid can be recovered.

According to a fourth aspect of the present invention, in the liquid feeding method for residual liquid described in the first aspect, the rising pipe is provided with a heat exchanger on the upstream pipe side of the first valve, and the upstream pipe The pipe is provided with a second valve, the second pipe is provided with a third valve, and is connected to the rising pipe side with respect to the second valve of the upstream pipe, and the first valve and the second valve When the valve is opened and the third valve is closed, liquid is fed from the first tank to the second tank, and when the liquid stored in the first tank reaches a predetermined amount, the first valve And the second valve is closed, the third valve is opened, gas is injected from the upstream side of the heat exchanger of the rising pipe, and the residual liquid in the heat exchanger is discharged from the second valve of the upstream pipe. On the downstream side, the second pipe and Via the serial downstream pipe in the residual liquid feeding method, characterized by feeding the second tank.

  In the fourth aspect, the liquid remaining in the heat exchanger can be heat-treated and recovered in the second tank.

  According to a fifth aspect of the present invention, there is provided a first tank, a second tank, a pipe connecting the first tank and the second tank, the rising pipe extending in the vertical direction, and the rising pipe The first pipe including the upstream pipe on the first tank side, the first pipe including the downstream pipe on the second tank side relative to the rising pipe, and the pipe connecting the upstream pipe and the downstream pipe from the first pipe The second pipe having a small diameter, the first valve provided in the rising pipe, the opening and closing of the first valve, and the pressurizing means provided in the first tank are controlled to control the first pipe from the first tank. And a control device configured to pump liquid into two tanks, and the control device closes the first valve when the liquid stored in the first tank reaches a predetermined amount. That rise Residual liquid in the pipe is retained in the upstream pipe, and the first tank is pressurized while the first valve is closed, whereby the residual liquid is supplied to the second tank via the second pipe and the downstream pipe. The liquid delivery apparatus is characterized by delivering liquid.

  In the fifth aspect, in normal liquid feeding, liquid feeding can be performed without increasing the time required for chemical liquid feeding, and the remaining chemical liquid can be more reliably recovered via the second pipe. An apparatus capable of performing the above is provided.

  According to a sixth aspect of the present invention, in the liquid delivery device described in the fifth aspect, the upstream pipe is provided with a second valve, and the second pipe is more than the second valve of the upstream pipe. Connected to the first tank side, the control device is configured to be able to control the opening and closing of the second valve, and when the liquid stored in the first tank reaches a predetermined amount, By closing the first valve, the residual liquid in the rising pipe is retained in the upstream pipe, and after closing the second valve, the inside of the first tank is pressurized to remove the residual liquid from the second pipe and In the liquid feeding device, the liquid is fed to the second tank through the downstream pipe.

  In the sixth aspect, by closing the second valve during the residual liquid treatment, the liquid staying in the upstream pipe is prevented from reaching the rising pipe, and the staying liquid is more quickly supplied to the second pipe. Can flow in.

  According to a seventh aspect of the present invention, in the liquid delivery device according to the fifth aspect, the upstream pipe is provided with a second valve, and the second pipe is more than the second valve of the upstream pipe. Connected to the rising pipe side, the control device is configured to be capable of controlling the opening and closing of the second valve, and when the liquid stored in the first tank reaches a predetermined amount, the control device By closing one valve, the residual liquid in the rising pipe is retained in the upstream pipe, the second valve is kept open, and the first tank is pressurized to pressurize the residual liquid. In the liquid feeding device, the liquid is fed to the second tank through a pipe and the downstream pipe.

  In the seventh aspect, since the second pipe is connected to the downstream side of the second valve of the upstream pipe, it is possible to avoid the remaining of the liquid and collect more liquid.

  According to an eighth aspect of the present invention, in the liquid delivery device described in the fifth aspect, the rising pipe is provided with a heat exchanger on the upstream pipe side of the first valve, and the upstream pipe A second valve is provided, the second pipe is provided with a third valve, and is connected to the rising pipe side with respect to the second valve of the upstream pipe, and the control means includes the second valve and the second valve. It is configured to be able to control the opening and closing of the third valve and the gas injection means for injecting the gas into the rising pipe, and the first valve and the second valve are opened and the third valve is closed. When the liquid supplied from the second tank to the first tank and the liquid stored in the first tank reaches a predetermined amount, the first valve and the second valve are closed, and the third valve is opened. , Stand up Gas is injected from the upstream side of the heat exchanger of the vertical pipe, and the residual liquid in the heat exchanger is sent to the downstream side of the second valve of the upstream pipe, through the second pipe and the downstream pipe. In the liquid feeding device, the liquid is fed to the second tank.

  In the eighth aspect, the liquid remaining in the heat exchanger can be heat-treated and recovered in the second tank.

  ADVANTAGE OF THE INVENTION According to this invention, the liquid feeding method and liquid feeding apparatus of the residual liquid which can avoid the increase in the time required for the liquid pumping and can collect the residual liquid in piping are provided.

It is a schematic block diagram of the liquid feeding apparatus which concerns on Embodiment 1. FIG. It is a schematic block diagram of the liquid feeding apparatus in the state in which the chemical | medical solution in the preparation tank reached the predetermined amount. It is a schematic block diagram of the liquid feeding apparatus after the pressurization by compressed air is stopped. It is a schematic block diagram of the liquid feeding apparatus after implementing pressurization by compressed air. It is a schematic block diagram of the liquid feeding apparatus which concerns on Embodiment 2. FIG. It is a schematic block diagram of the liquid feeding apparatus in the state in which the chemical | medical solution in the preparation tank reached the predetermined amount. It is a schematic block diagram of the liquid feeding apparatus after the pressurization by compressed air is stopped. It is a schematic block diagram of the liquid feeding apparatus after implementing pressurization by compressed air. It is a schematic block diagram of the liquid feeding apparatus which concerns on Embodiment 3. It is a schematic block diagram of the liquid feeding apparatus in the state in which the chemical | medical solution in the preparation tank reached the predetermined amount. It is a schematic block diagram of a liquid feeding apparatus when liquid medicine which remained has been sent to a heat exchanger. It is a schematic block diagram of the liquid feeding apparatus after introduction of compressed air.

  Hereinafter, modes for carrying out the present invention will be described. In addition, description of embodiment is an illustration and this invention is not limited to the following description.

<Embodiment 1>
FIG. 1 is a schematic configuration diagram of a liquid delivery device according to the present embodiment. The liquid delivery device 1 is installed in a plant that produces, for example, a chemical solution as a liquid, adjusts the chemical solution in a preparation tank 2 that is an example of a first tank, and stores the chemical solution as an example of a second tank 3 to be pumped and stored.

  Specifically, the liquid delivery device 1 is provided so as to bypass the preparation tank 2, the storage tank 3, the first pipe 10 connecting the preparation tank 2 and the storage tank 3, and the first pipe 10. Control device (not shown) such as a programmable logic controller (PLC) for controlling the liquid feeding process of the two piping 20, the first valve 31 and the second valve 32 provided in the first piping 10, and the liquid feeding device 1. And.

  The preparation tank 2 is a tank for adjusting a chemical solution. Although not particularly illustrated, the preparation tank 2 is provided with an inlet for supplying a raw material of the chemical liquid to be manufactured and an outlet for discharging the manufactured chemical liquid, and can be opened and closed by a control signal from the control device. . Moreover, the preparation tank 2 is provided with a compressed air supply device (not shown) for supplying compressed air therein as an example of a pressurizing means. The compressed air supply device can supply air to the preparation tank 2 at a pressure specified by a control signal from the control device.

  The storage tank 3 is a tank that stores the chemical liquid that is pumped from the preparation tank 2 through the first pipe 10. Although not particularly shown, the storage tank 3 is provided with an inlet for supplying the pumped chemical and an outlet for discharging the chemical, and can be opened and closed by a control signal from the control device. In addition, the storage tank 3 is connected to a filling machine that fills the container with the chemical liquid, and the chemical liquid can be discharged from the discharge port of the filling machine and supplied to the filling machine.

  The 1st piping 10 is a pipe line which connects the preparation tank 2 and the storage tank 3, and a chemical | medical solution distribute | circulates. Specifically, the first pipe 10 is configured by connecting an upstream pipe 11, a rising pipe 12, and a downstream pipe 13.

  The rising pipe 12 is a pipe extending in the vertical direction. The rising pipe 12 extending in the vertical direction in the present invention is not limited to the vertical direction, and may be inclined with respect to the vertical direction.

  The upstream pipe 11 is connected to the preparation tank 2 and is upstream of the rising pipe 12. In the present embodiment, the upstream pipe 11 is connected to a discharge port provided in the lower part of the preparation tank 2, extends downward, bends and extends in a substantially horizontal direction, and is connected to the rising pipe 12.

  The downstream pipe 13 is connected to the storage tank 3 and is a pipe on the downstream side of the rising pipe 12. In the present embodiment, the downstream pipe 13 is connected to the rising pipe 12 and extends in a substantially horizontal direction, and is bent downward and connected to a charging port provided in the upper part of the storage tank 3.

  The upstream pipe 11, the rising pipe 12, and the downstream pipe 13 have substantially the same diameter, and when they are integrally connected, the first pipe 10 is formed, and the flow of the chemical solution from the preparation tank 2 to the storage tank 3 is performed. Constitutes the road. The upstream pipe 11, the rising pipe 12, and the downstream pipe 13 may be configured by joining individual pipes, or may be configured as a single pipe. Further, the upstream pipe 11, the rising pipe 12, and the downstream pipe 13 may all have the same diameter or may be different. The first pipe 10 to the third pipe 13 can be made of metal, plastic, or the like, but are not particularly limited.

  Moreover, the boundary part between the upstream pipe 11 and the rising pipe 12 is referred to as a first connection part P1, and the boundary part between the downstream pipe 13 and the rising pipe 12 is referred to as a second connection part P2.

  The second pipe 20 is a pipe that connects the upstream pipe 11 and the downstream pipe 13. That is, the second pipe 20 is connected to the first pipe 10 so as to bypass the rising pipe 12. Specifically, the second pipe 20 extends substantially in the vertical direction, like the rising pipe 12. In addition, one end of the second pipe 20 is connected to the upstream side (preparation tank 2 side) of the first connection part P1 of the upstream pipe 11, and the other end of the second pipe 20 is connected to the second connection part P2 of the downstream pipe. It is connected to the downstream side (storage tank 3 side).

  A boundary part between the upstream pipe 11 and the second pipe 20 is referred to as a branch part P3, and a boundary part between the downstream pipe 13 and the second pipe 20 is referred to as a joining part P4.

  The diameter of the second pipe 20 is substantially constant and is smaller than the diameter of the first pipe 10. When the diameters of the upstream pipe 11, the rising pipe 12 and the downstream pipe 13 constituting the first pipe 10 are different, the diameter of the second pipe 20 is at least smaller than the diameter of the rising pipe 12.

  The rising pipe 12 is provided with a first valve 31 between the first connection part P1 and the second connection part P2. Moreover, the 2nd valve | bulb 32 is provided in the upstream piping 11 between the 1st connection part P1 and the branch part P3. That is, one end of the second pipe 20 is connected to the preparation tank 2 side with respect to the second valve 32 of the upstream pipe 11.

  The first valve 31 is a valve that opens and closes the rising pipe 12, and the second valve 32 is a valve that opens and closes the upstream pipe 11. The first valve 31 and the second valve 32 can be opened and closed by a control signal from the control device.

  In the present embodiment, the liquid delivery device 1 has a discharge pipe 37, and the discharge pipe 37 is connected to the first connection portion P1. The discharge pipe 37 is provided with a discharge valve 38. The discharge valve 38 can be opened and closed by a control signal from the control device.

  The liquid feeding device 1 having the above-described configuration adjusts the chemical liquid in the preparation tank 2 and pumps the chemical liquid to the storage tank 3.

  Specifically, the control device of the liquid delivery device 1 opens the first valve 31 and the second valve 32, closes the discharge valve 38, and opens the discharge port of the preparation tank 2. Thereby, the chemical | medical solution stored in the preparation tank 2 reaches the 2nd piping 20 from the branch part P3 via the upstream piping 11, and the rising piping 12 from the 1st connection part P1. The liquid is supplied until the liquid level of the chemical liquid in the second pipe 20 and the rising pipe 12 matches the liquid level of the chemical liquid in the preparation tank 2.

  The control device supplies compressed air to the preparation tank 2 when the liquid level of the chemical liquid in the rising pipe 12 and the second pipe 20 matches the liquid level of the chemical liquid in the preparation tank 2. To control the compressed air supply device. The chemical liquid rises in the second pipe 20 and the rising pipe 12 due to the pressure of the compressed air, reaches the downstream pipe 13, and flows into the storage tank 3.

  Whether the liquid level of the chemical liquid in the rising pipe 12 and the second pipe 20 matches the liquid level of the chemical liquid in the preparation tank 2 is determined as follows. For example, the time required from when the discharge port of the preparation tank 2 is opened until the liquid level coincides is measured in advance, and the time (referred to as time A) is stored in the control device. When starting the operation of pumping the chemical solution from the preparation tank 2 to the storage tank 3, the control device opens the discharge port of the preparation tank 2 and measures the elapsed time from when the discharge port is opened. It is determined whether or not the elapsed time has reached time A, and if they match, the liquid level of the chemical liquid in the rising pipe 12 and the second pipe 20 is the liquid level of the chemical liquid in the preparation tank 2. Judged to match the height of the surface.

  Thereafter, the control device controls the pressure in the preparation tank 2 so that the chemical solution can be pumped from the preparation tank 2 to the storage tank 3 via the first pipe 10 and the second pipe 20.

  Here, the operation of the liquid feeding device 1 (referred to as residual liquid processing) when the chemical liquid in the preparation tank 2 is decreased by continuing the liquid feeding and reaches a predetermined amount will be described.

  FIG. 2 is a schematic configuration diagram of the liquid delivery device 1 in a state where the chemical solution in the preparation tank 2 reaches a predetermined amount. The hatch in the figure represents a chemical solution. The state in which the chemical solution in the preparation tank 2 has reached a predetermined amount is a state in which the chemical solution in the preparation tank 2 is empty, or the chemical solution does not reach the storage tank 3 even if pumping is continued, and the first pipe 10 A state in which the chemical solution has been reduced to such an extent that it remains. In the example shown in the figure, the chemical liquid remains partway through the rising pipe 12 and the second pipe 20, and the chemical liquid cannot be pumped to the storage tank 3 beyond this. In addition, liquid feeding before the chemical liquid in the preparation tank 2 reaches a predetermined amount is referred to as normal liquid feeding.

  When this happens, the controller of the liquid delivery device 1 closes the first valve 31, keeps the second valve 32 open, keeps the discharge valve 38 closed, and compresses the preparation tank 2. Stop pressurization with air.

  FIG. 3 is a schematic configuration diagram of the liquid feeding device after the pressurization by the compressed air is stopped. As shown in the figure, the chemical liquid remaining in the rising pipe 12 and the second pipe 20 by stopping the pressurization by the compressed air in the preparation tank 2 is caused to flow under the upstream pipe 11 and the rising pipe 12 (first 1 connection portion P1 vicinity).

  In such a state, the control device of the liquid feeding device 1 closes the second valve 32 and pressurizes the preparation tank 2 with compressed air.

  FIG. 4 is a schematic configuration diagram of the liquid feeding device after pressurization with compressed air. As shown in the figure, the chemical solution staying in the lower part of the upstream pipe 11 and the rising pipe 12 is subjected to pressurization by the compressed air in the preparation tank 2 from the branch part P3 through the second pipe 20 and the junction part P4. Then, it reaches the downstream pipe 13 and is pumped to the storage tank 3.

  As described above, in the liquid delivery device 1 according to the present embodiment, when the chemical liquid continues to be pumped from the preparation tank 2 to the storage tank 3 and the chemical liquid in the preparation tank 2 reaches a predetermined amount, the storage tank The chemical solution remains partially in the rising pipe 12 and the second pipe 20 without being completely pumped to the pipe 3. Thereafter, the first valve 31 is closed to stop the pumping, so that the remaining chemical solution is retained in the upstream pipe 11 (see FIG. 3), the second valve 32 is closed and the pumping is restarted to restart the second pipe. The residual liquid can be pumped to the storage tank 3 via 20 (see FIG. 4).

  Here, as described above, the second pipe 20 has a smaller diameter than the rising pipe 12. For this reason, even if it is a small amount of remaining chemical liquid, the chemical liquid can be pumped through the second pipe 20 by pressurizing the preparation tank 2 together with the closing of the second valve 32.

  Note that when the rising pipe 12 is raised from the upstream pipe 11 through the first connection portion P1, the remaining small amount of the chemical solution has a larger diameter than the second pipe 20, and thus requires a higher pressure. However, when a high pressure is applied, since the chemical liquid is small, the compressed air passes through the residual liquid, reaches the downstream pipe 13 side, and does not act to push up the chemical liquid.

  In the liquid delivery device 1 of the present embodiment, the chemical solution remaining in the upstream pipe 11 is made to pass through the second pipe 20 with the second valve 32 closed. Thereby, it is suppressed that compressed air passes the chemical | medical solution which entered into the thin 2nd piping 20, and it can make it easy to push up a chemical | medical solution upward.

  Further, if the diameter of the first pipe 10 is reduced in order to pump the remaining chemical liquid to the storage tank 3, the time required for normal liquid supply increases. However, in the liquid feeding device 1 according to the present embodiment, the first pipe 10 and the second pipe 20 are used together for normal liquid feeding. Therefore, even if the thin second pipe 20 is employed, the time required for feeding the chemical liquid. The chemical liquid can be efficiently fed without increasing.

  As described above, the liquid feeding device 1 according to the present embodiment can perform liquid feeding without increasing the time for pressure feeding of the chemical liquid in normal liquid feeding, and can remain through the second pipe 20. The collected chemical solution can be recovered more reliably.

  Further, the liquid feeding device 1 has a configuration in which the second valve 32 is provided in the upstream pipe 11 and the second pipe 20 is provided on the upstream side of the second valve 32. As a result, by closing the second valve 32 during the residual liquid treatment, the chemical liquid staying in the upstream pipe 11 is prevented from rising and reaching the pipe 12, and the staying chemical liquid flows into the second pipe 20 more quickly. Can be made.

  In addition, there is a possibility that the chemical solution may remain in the upstream pipe 11 and the discharge pipe 37 between the second valve 32 and the discharge valve 38. For example, this is discharged to the outside by opening the discharge valve 38. May be.

<Embodiment 2>
FIG. 5 is a schematic configuration diagram of the liquid delivery device according to the present embodiment. In addition, the same code | symbol is attached | subjected to the same thing as Embodiment 1, and the overlapping description is abbreviate | omitted.

  The liquid delivery apparatus 1A according to the present embodiment is different from the liquid delivery apparatus 1 according to the first embodiment in the arrangement of the second piping.

  The second pipe 20 </ b> A is a pipe that connects the upstream pipe 11 and the downstream pipe 13. That is, the second pipe 20 is connected to the first pipe 10 so as to bypass the rising pipe 12. Specifically, like the rising pipe 12, the second pipe 20A extends substantially in the vertical direction. One end of the second pipe 20A is connected to the downstream side (rising pipe 12 side) of the first connection part P1 ′ of the upstream pipe 11, and the other end of the second pipe 20A is the second connection part of the downstream pipe. It is connected to the downstream side (storage tank 3 side) from P2.

  In the present embodiment, a boundary portion between the upstream pipe 11, the rising pipe 12, and the second pipe is referred to as a first connection portion P1 '.

  1 A of liquid feeding apparatuses of the structure mentioned above adjust a chemical | medical solution in the preparation tank 2, and pressure-feed the said chemical | medical solution to the storage tank 3 (normal liquid feeding).

  Specifically, the control device of the liquid feeding device 1A opens the first valve 31 and the second valve 32, and opens the discharge port of the preparation tank 2. Thereby, the chemical solution stored in the preparation tank 2 reaches the second pipe 20 </ b> A and the rising pipe 12 from the first connection portion P <b> 1 ′ via the upstream pipe 11. Liquid feeding is performed until the liquid level of the chemical liquid in the second pipe 20 </ b> A and the rising pipe 12 matches the liquid level of the chemical liquid in the preparation tank 2.

  The control device supplies compressed air to the preparation tank 2 when the liquid level of the chemical liquid in the rising pipe 12 and the second pipe 20 </ b> A matches the liquid level of the chemical liquid in the preparation tank 2. To control the compressed air supply device. The chemical liquid rises in the second pipe 20 </ b> A and the rising pipe 12 by the pressure of the compressed air, reaches the downstream pipe 13, and flows into the storage tank 3.

  Thereafter, the control device controls the pressure in the preparation tank 2 so that the chemical solution can be pumped from the preparation tank 2 to the storage tank 3 via the first pipe 10 and the second pipe 20A.

  Here, the residual liquid processing of the liquid feeding apparatus 1A will be described. FIG. 6 is a schematic configuration diagram of the liquid delivery device 1A in a state where the chemical solution in the preparation tank 2 reaches a predetermined amount. In the example shown in the figure, the chemical liquid remains partway through the rising pipe 12 and the second pipe 20A, and the chemical liquid cannot be pumped to the storage tank 3 beyond this.

  In such a state, the control device of the liquid feeding device 1A closes the first valve 31 and keeps the second valve 32 open, and stops the pressurization of the preparation tank 2 by the compressed air.

  FIG. 7 is a schematic configuration diagram of the liquid feeding device after pressurization by compressed air is stopped. As shown in the figure, since the pressurization by the compressed air in the preparation tank 2 is stopped, the chemical solution remaining in the rising pipe 12 and the second pipe 20A is removed from the upstream pipe 11 and the lower part of the rising pipe 12 (first 1 connection part P1 'vicinity) and the lower part of 2nd piping 20A.

  In such a state, the control device of the liquid feeding device 1A performs pressurization of the preparation tank 2 with compressed air while the first valve 31 is closed and the second valve 32 is opened.

  FIG. 8 is a schematic configuration diagram of the liquid delivery device after pressurization with compressed air. As shown in the figure, the chemical solution staying in the lower part of the upstream pipe 11, the rising pipe 12, and the second pipe 20 </ b> A is changed from the first connection part P <b> 1 ′ by the pressurization with the compressed air in the preparation tank 2. It reaches the downstream pipe 13 via the two pipes 20 </ b> A and the junction P <b> 4 and is pumped to the storage tank 3.

  As described above, in the liquid delivery device 1A according to the present embodiment, when the chemical liquid continues to be pumped from the preparation tank 2 to the storage tank 3 and the chemical liquid in the preparation tank 2 reaches a predetermined amount, the storage tank The chemical solution remains partially in the rising pipe 12 and the second pipe 20A. Thereafter, the first valve 31 is closed to stop the pumping, whereby the remaining chemical solution is retained in the upstream pipe 11, the lower part of the rising pipe 12, and the lower part of the second pipe 20A (see FIG. 7). The residual liquid can be pumped to the storage tank 3 via the second pipe 20A by closing the valve and restarting the pumping with the second valve 32 opened (see FIG. 8).

  Here, as described above, the diameter of the second pipe 20 </ b> A is smaller than that of the rising pipe 12. For this reason, even if it is a small amount of remaining chemical liquid, the chemical liquid can be pumped through the second pipe 20A by performing pressurization of the preparation tank 2 together with the closing of the second valve 32.

  In the liquid feeding device 1A according to this embodiment as well, like the liquid feeding device 1 according to the first embodiment, liquid feeding is possible without increasing the time for pressure feeding of the chemical liquid in normal liquid feeding. Moreover, the chemical | medical solution which remained via the 2nd piping 20A can be collect | recovered more reliably.

  Furthermore, in the liquid feeding device 1 according to the first embodiment, there is a possibility that the chemical solution may remain in the upstream pipe 11 and the discharge pipe 37 between the second valve 32 and the discharge valve 38. However, in the liquid delivery device 1A according to the present embodiment, since the second pipe 20A is connected to the downstream side of the second valve 32 of the upstream pipe 11, it is possible to avoid the remaining of the chemical liquid as described above. Many chemicals can be collected.

<Embodiment 3>
FIG. 9 is a schematic configuration diagram of a liquid delivery device according to the present embodiment. In addition, the same code | symbol is attached | subjected to the same thing as Embodiment 1 and Embodiment 2, and the overlapping description is abbreviate | omitted.

  The liquid feeding device 1B according to the present embodiment is different from the liquid feeding device 1 according to the first embodiment in the arrangement of the second pipe and the configuration in which the heat exchanger 40 is provided in the rising pipe 12.

  In the rising pipe 12, a heat exchanger 40 is provided in the upstream pipe 11 from the first valve 31. The rising pipe 12 includes at least two rising pipes 12a and 12b. The rising pipe 12 a is connected to a chemical liquid outlet provided at the upper part of the heat exchanger 40, and the rising pipe 12 b is connected to a chemical liquid inlet provided at the lower part of the heat exchanger 40. The rising pipe 12 is provided with a heat exchanger 40.

  The heat exchanger 40 is a device that indirectly exchanges heat with a chemical solution using a heat medium, such as a so-called shell tube type heat exchanger or a plate type heat exchanger. Specifically, the heat exchanger 40 has a first flow path through which the chemical solution flows and a second flow path (none of which is shown) that allows the heat medium to flow outside the first flow path.

  In other words, the chemical liquid flows into the first flow path of the heat exchanger 40 from the rising pipe 12b, and the chemical liquid flowing through the first flow path is heat-exchanged by the heat medium flowing through the second flow path, and enters the rising pipe 12a. Discharged.

  The rising pipe 12a is provided with an air supply pipe 36 branched from the rising pipe 12a. The air supply pipe 36 is connected to gas press-fitting means (not shown). The gas press-fitting means is a device that supplies a predetermined pressure gas such as an air compressor to the air supply pipe 36. The gas press-fitting means controls supply of gas to the air supply pipe 36 by a control signal from the control device. The air supply pipe 36 is provided with an air supply valve 39. The air supply valve 39 is a valve that opens and closes the air supply pipe 36 and is controlled to open and close by a control signal from the control device.

  The boundary portion between the rising pipe 12a and the air supply pipe 36 is referred to as a third connection portion P5.

  The second pipe 20 </ b> B is a pipe that connects the upstream pipe 11 and the downstream pipe 13. That is, the second pipe 20 </ b> B is connected to the first pipe 10 so as to bypass the rising pipe 12. Specifically, the second pipe 20 </ b> B extends substantially in the vertical direction, like the rising pipe 12. One end of the second pipe 20B is connected to the rising pipe 12 side of the second valve 32 of the upstream pipe 11, and the other end of the second pipe 20B is downstream of the second connection portion P2 of the downstream pipe ( Connected to the storage tank 3 side).

  Further, a third valve 33 is provided in the second pipe 20B. The third valve 33 is a valve that opens and closes the second pipe 20B, and is controlled to open and close by a control signal from the control device.

  The liquid feeding device 1B having the above-described configuration adjusts the chemical liquid in the preparation tank 2 and pressure-feeds the chemical liquid to the storage tank 3 (normal liquid feeding).

  Specifically, the control device of the liquid delivery device 1B opens the first valve 31 and the second valve 32, closes the third valve 33, closes the discharge valve 38 and the air supply valve 39, and prepares the preparation tank 2. Open the outlet. Thereby, the chemical | medical solution stored in the preparation tank 2 reaches the rising piping 12b and the heat exchanger 40 from the 1st connection part P1 via the upstream piping 11. FIG. Liquid feeding is performed until the liquid level of the chemical liquid in the rising pipe 12 b and the heat exchanger 40 matches the liquid level of the chemical liquid in the preparation tank 2.

  The control device supplies compressed air to the preparation tank 2 when the liquid level of the chemical liquid in the rising pipe 12 and the heat exchanger 40 matches the liquid level of the chemical liquid in the preparation tank 2. To control the compressed air supply device. The chemical solution rises in the rising pipe 12 and the heat exchanger 40 by the pressure of the compressed air, reaches the downstream pipe 13, and flows into the storage tank 3.

  Thereafter, the control device controls the pressure in the preparation tank 2 so that the chemical solution is pumped from the preparation tank 2 to the storage tank 3 through the first pipe 10 and heat exchange by the heat exchanger 40. be able to.

  Here, the residual liquid processing of the liquid feeding device 1B will be described. FIG. 10 is a schematic configuration diagram of the liquid delivery device 1B in a state where the chemical solution in the preparation tank 2 reaches a predetermined amount. In the example shown in the figure, the chemical solution remains partway through the rising pipe 12b and the heat exchanger 40, and the chemical solution cannot be pumped to the storage tank 3 beyond this.

  FIG. 11 is a schematic configuration diagram of the liquid feeding device when the remaining chemical liquid is fed to the heat exchanger 40. When the chemical solution in the preparation tank 2 reaches a predetermined amount, as shown in the figure, the control device of the liquid feeding device 1B causes the chemical solution remaining in the upstream pipe 11 and the rising pipe 12b to flow into the heat exchanger 40. The pressure in the preparation tank 2 is controlled and the pumping is continued until the pressure reaches. Thereby, the remaining chemical solution is sent to the heat exchanger 40 and heat-treated.

  Next, the control device closes the first valve 31 and the second valve 32, opens the third valve 33, keeps the discharge valve 38 closed, opens the air supply valve 39, and controls the gas injection means. Then, compressed air having a predetermined pressure is introduced into the air supply pipe 36.

  FIG. 12 is a schematic configuration diagram of the liquid feeding device after introduction of compressed air. As shown in the figure, the opening and closing control of the first valve 31 to the third valve 33 is performed, and the compressed air is introduced into the rising pipe 12a on the downstream side of the heat exchanger 40 from the gas press-fitting means. The chemical solution remaining in 40 reaches the downstream pipe 13 via the rising pipe 12b, the upstream pipe 11, the second pipe 20B, and the junction P4, and is pumped to the storage tank 3.

  As described above, in the liquid delivery device 1B according to the present embodiment, when the chemical liquid continues to be pumped from the preparation tank 2 to the storage tank 3 and the chemical liquid in the preparation tank 2 reaches a predetermined amount, the storage tank The chemical solution remains partially in the rising pipe 12 b and the upstream pipe 11 without being completely pumped to the pipe 3. Thereafter, the chemical solutions are heat-treated by pumping them to the heat exchanger 40, and then the valves are controlled to be opened and closed, and compressed air is introduced from the gas press-fitting means to the downstream side of the heat exchanger 40. Thus, the chemical liquid remaining in the heat exchanger 40 can be pumped to the storage tank 3 via the upstream pipe 11, the rising pipe 12b, and the second pipe 20B (see FIG. 12).

  Here, as described above, the second pipe 20 </ b> B has a smaller diameter than the rising pipe 12. For this reason, even if it is a small amount of remaining chemical liquid, the chemical liquid can be pumped via the second pipe 20B by performing pressurization of the preparation tank 2 together with the closing of the second valve 32. Moreover, since the said chemical | medical solution is heat-processed in the heat exchanger 40, it can avoid that the residual chemical | medical solution which is not heat-processed is pumped to the storage tank 3. FIG.

  In the liquid feeding device 1B according to this embodiment as well, as with the liquid feeding device 1 according to the first embodiment, in normal liquid feeding, liquid feeding can be performed without increasing the time for pressure feeding of the chemical liquid. Moreover, the chemical | medical solution which remained via the 2nd piping 20B can be collect | recovered more reliably.

<Other embodiments>
As mentioned above, although one Embodiment of this invention was described, the basic composition of this invention is not limited to what was mentioned above.

  For example, the liquid sent by the liquid feeding device is not limited to a chemical solution, and the present invention can be applied to any liquid.

  In Embodiments 1-3, the preparation tank 2 which prepares a chemical | medical solution is illustrated as a 1st tank, and the storage tank 3 which stores a chemical | medical solution is illustrated as a 2nd tank. However, the 1st tank and the 2nd tank should just be a container which can store liquid, and are not limited to the mode illustrated in Embodiments 1-3, and an application.

  Further, the preparation tank 2 and the storage tank 3 are not limited to one each, and may be plural. In this case, the present invention is applied by joining the pipes connected to the plurality of preparation tanks 2 to form upstream pipes and joining the pipes connected to the plurality of storage tanks 3 to form downstream pipes. Can do.

  Moreover, in Embodiment 1 mentioned above, although the 2nd valve | bulb 32 was provided in the upstream piping 11, the 2nd valve | bulb 32 does not necessarily need to be provided. That is, in the case of the residual liquid treatment, the first valve 31 may be closed and the inside of the preparation tank 2 may be pressurized. Even in such an aspect, the chemical solution remaining in the upstream pipe 11 can be pumped to the storage tank 3 via the second pipe 20.

  Moreover, in Embodiment 1-3 mentioned above, although the number of the 1st piping 10, the 2nd piping 20, and the rising piping 12 was one each, the number is not limited to one, Even if it is multiple Good.

  Furthermore, in Embodiments 1 to 3 described above, the normal liquid feeding and the residual liquid treatment are performed under the control of the control device. However, the present invention is not limited to this aspect, and may be manual.

1, 1A, 1B Liquid feeding device 2 Preparation tank (first tank)
3 Storage tank (second tank)
10 1st piping 11 Upstream piping 12, 12a, 12b Rising piping 13 Downstream piping 20, 20A, 20B 2nd piping 31 1st valve 32 2nd valve 33 3rd valve 40 Heat exchanger

Claims (8)

A first tank;
A second tank,
A pipe connecting the first tank and the second tank, the rising pipe extending in the vertical direction, the upstream pipe on the first tank side with respect to the rising pipe, and the second tank with respect to the rising pipe A first pipe including a downstream pipe on the side;
A pipe connecting the upstream pipe and the downstream pipe, the second pipe having a smaller diameter than the first pipe;
A first valve provided in the rising pipe, and a liquid feeding method for residual liquid in a liquid feeding device for sending liquid from the first tank to the second tank,
In a state where the first valve is opened, liquid is fed from the first tank to the second tank,
When the liquid stored in the first tank reaches a predetermined amount, the liquid remaining in the rising pipe is retained in the upstream pipe by closing the first valve,
The residual liquid is sent to the second tank through the second pipe and the downstream pipe by pressurizing the first tank while the first valve is closed. Liquid method. In the liquid feeding method of the residual liquid described in claim 1,
The upstream pipe is provided with a second valve,
The second pipe is connected to the first tank side than the second valve of the upstream pipe,
In the state where the first valve and the second valve are opened, the liquid is sent from the first tank to the second tank,
When the liquid stored in the first tank reaches a predetermined amount, the liquid remaining in the rising pipe is retained in the upstream pipe by closing the first valve,
After the second valve is closed, the residual liquid is sent to the second tank through the second pipe and the downstream pipe by pressurizing the first tank. Delivery method. In the liquid feeding method of the residual liquid described in claim 1,
The upstream pipe is provided with a second valve,
The second pipe is connected to the rising pipe side from the second valve of the upstream pipe,
In the state where the first valve and the second valve are opened, the liquid is sent from the first tank to the second tank,
When the liquid stored in the first tank reaches a predetermined amount, the residual liquid in the rising pipe is retained in the upstream pipe by closing the first valve,
The state in which the second valve is opened and the inside of the first tank is pressurized so that the residual liquid is sent to the second tank through the second pipe and the downstream pipe. A method for feeding the residual liquid. In the liquid feeding method of the residual liquid described in claim 1,
The rising pipe is provided with a heat exchanger on the upstream pipe side of the first valve,
The upstream pipe is provided with a second valve,
The second pipe is provided with a third valve, and is connected to the rising pipe side from the second valve of the upstream pipe,
In the state where the first valve and the second valve are opened and the third valve is closed, the liquid is sent from the first tank to the second tank,
When the liquid stored in the first tank reaches a predetermined amount, the first valve and the second valve are closed, the third valve is opened, and the upstream side of the heat exchanger of the rising pipe is opened. A gas is injected, and the residual liquid in the heat exchanger is sent to the second tank via the second pipe and the downstream pipe on the downstream side of the second valve of the upstream pipe. To feed residual liquid. A first tank;
A second tank,
A pipe connecting the first tank and the second tank, the rising pipe extending in the vertical direction, the upstream pipe on the first tank side with respect to the rising pipe, and the second tank with respect to the rising pipe A first pipe including a downstream pipe on the side;
A pipe connecting the upstream pipe and the downstream pipe, the second pipe having a smaller diameter than the first pipe;
A first valve provided in the rising pipe;
A control device configured to control the opening and closing of the first valve and the pressurizing means provided in the first tank to pump liquid from the first tank to the second tank;
When the liquid stored in the first tank reaches a predetermined amount, the control device causes the residual liquid in the rising pipe to stay in the upstream pipe by closing the first valve, so that the first valve The liquid feeding device, wherein the residual liquid is fed to the second tank through the second pipe and the downstream pipe by pressurizing the first tank with the valve closed. In the liquid feeding device described in claim 5,
The upstream pipe is provided with a second valve,
The second pipe is connected to the first tank side than the second valve of the upstream pipe,
The controller is
Configured to control opening and closing of the second valve;
When the liquid stored in the first tank reaches a predetermined amount, the first valve is closed to cause residual liquid in the rising pipe to stay in the upstream pipe, and the second valve is closed. The liquid feeding device is configured to send the residual liquid to the second tank through the second pipe and the downstream pipe by pressurizing the inside of the first tank. In the liquid feeding device described in claim 5,
The upstream pipe is provided with a second valve,
The second pipe is connected to the rising pipe side from the second valve of the upstream pipe,
The controller is
Configured to control opening and closing of the second valve;
When the liquid stored in the first tank reaches a predetermined amount, the first valve is closed to cause the residual liquid in the rising pipe to stay in the upstream pipe, and the second valve is opened. The liquid supply device is configured to supply the residual liquid to the second tank through the second pipe and the downstream pipe by maintaining the pressure in the first tank and pressurizing the inside of the first tank. In the liquid feeding device described in claim 5,
The rising pipe is provided with a heat exchanger on the upstream pipe side of the first valve,
The upstream pipe is provided with a second valve,
The second pipe is provided with a third valve, and is connected to the rising pipe side from the second valve of the upstream pipe,
The control means includes
Opening and closing of the second valve and the third valve, and gas injection means for injecting gas into the rising pipe can be controlled,
In the state where the first valve and the second valve are opened and the third valve is closed, the liquid is sent from the second tank to the first tank,
When the liquid stored in the first tank reaches a predetermined amount, the first valve and the second valve are closed, the third valve is opened, and the upstream side of the heat exchanger of the rising pipe is opened. A gas is injected, and the residual liquid in the heat exchanger is sent to the second tank via the second pipe and the downstream pipe on the downstream side of the second valve of the upstream pipe. Liquid feeding device.

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