JP5205158B2 - Liquid transfer method for residual liquid in the pipeline - Google Patents

Description

  The present invention relates to a method for feeding residual liquid in a pipeline, and more particularly, to a method for feeding residual liquid remaining in a pipeline having a filter device for filtering liquid by pumping air.

  In general, in a liquid product manufacturing plant for processing liquid products such as drinking water and liquid pharmaceuticals such as injections and eye drops, the pipeline is connected from the preparation tank to the filling machine through the liquid storage tank. In the case where the liquid product is pumped by supplying compressed air of a predetermined pressure, a predetermined amount of the liquid product may remain in the pipeline after the end of production.

  That is, as shown in FIG. 5, in the liquid product manufacturing plant, the preparation tank 31, the filtration filter device 32, and the liquid storage tank 33 are disposed on the second floor (preparation room) of the plant and the filling machine 34 is 1 In the case where the liquid product in the preparation tank 31 is disposed in the floor (filling chamber) and is further provided in a staircase shape so that the pipe line 35 is gradually lowered in height, Therefore, there is no possibility that residual liquid is generated in the pipe 35 at the end of manufacture.

  However, as shown in FIG. 6, due to the equipment circumstances of the liquid product manufacturing plant, the preparation tank 31, the liquid storage tank 33, and the filling machine 34 are generally arranged on the same floor in the plant.

In this regard, according to a follow-up survey of all 160 plants equipped with injection and eye drop preparation equipment delivered by the patent applicant to the customer's drug manufacturing company, it has a preparation tank as shown in FIG. The number of cases where the preparation room and the filling room equipped with the filling machine are arranged on the same floor is 139 (87%), and the preparation room as shown in FIG. There were 21 cases (13%) on the first floor.

Therefore, in many liquid product manufacturing plants, as shown in FIG. 6 , the preparation chamber having the preparation tank 31 and the filling chamber provided with the filling machine 34 are arranged on the same floor. In this case, as shown in FIG. 6 , when the preparation tank 31, the liquid storage tank 33 and the filling machine 34 are arranged on the same floor, the residual liquid related to the liquid product particularly constitutes a pipeline in the plant. Due to individual attachment circumstances of the pipe 35, the pipe 35 is generated from the liquid feed hole of the preparation tank 31 and the liquid storage tank 33 at a portion extending upward from the plant floor G as an installation surface.

  As described above, in the so-called “rising piping portion” formed by rising the piping) (for example, the portion indicated by 35a in FIG. 6), the residual liquid related to such a liquid product is removed after the liquid feeding operation is completed. Since it is left in the pipe 35a, the liquid product recovery rate (yield) is greatly reduced. Therefore, from the viewpoint of improving the yield of the liquid product, it is necessary to appropriately recover the liquid product residue in the pipeline by feeding it from the pipeline.

  In this case, in the case of a liquid supply pipe line of a general liquid processing plant that is not a production plant for food or chemicals, when a residue is generated in the pipe line, pressurized air is instantaneously given in the pipe line. It is possible to forcibly send and recover the residual liquid from the inside of the pipe line by supplying at a flow rate of.

  However, in the case of a production plant for liquid products such as various beverages and medicines, the filtration filter device 32 is disposed in the pipe 35. Such a filtration filter device 32 has a filter part having a very fine permeation structure in units of microns, and is transferred while filtering and sterilizing a liquid product through the filter part.

  Accordingly, the filter used in such a filtration filter device 32 is to send the residual liquid as described above because the water impregnated in the filter has surface tension once it gets wet with the liquid. Even when air is pumped to the air, it cannot be pumped because it does not transmit air.

  In addition, among the above liquid products, liquid medicines such as injection solutions and eye drops are very expensive, so in the production of products, in order to improve the yield, In the past, there has been a demand for efficiently recovering a liquid medicine, which is a liquid product remaining in the filter, without destroying the filter device.

As a result of investigating patent documents from such a viewpoint, the following patent documents were discovered.
Japanese Patent Laid-Open No. 9-40092 Japanese Utility Model Publication No. 3-96500 Japanese Patent Laid-Open No. 61-66000 JP 2007-263322 A Japanese Patent Laid-Open No. 9-40092

However, none of the documents discloses a technique for recovering residual liquid in a pipe line in which a filter device is disposed.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to effectively feed and recover a liquid product as a residue remaining in a liquid product manufacturing pipeline in which a filter device is disposed.

In order to solve such a problem, the invention according to claim 1 is a method for feeding a residual liquid in a pipe, in which the liquid remaining in the pipe is pumped by pressurized air and sent. A filtration filter device for filtering liquid is provided upstream of the filtration filter device in the pipeline, and the flow rate of air is controlled by adjusting the opening degree of the vent valve provided in the pipeline. The liquid remaining in the water is separated from the air and sent.

  Therefore, in the first aspect of the invention, even in the pipe line provided with the filtration filter device, the remaining liquid is changed to air by adjusting the opening degree of the vent valve and controlling the flow rate of the air. It can be separated and sent.

In the invention described in claim 2, the conduit is formed between a preparation tank for preparing a liquid product and a filling machine for filling the container with the liquid product, and between the preparation tank and the filling machine. Is characterized in that a liquid storage tank is disposed and the filtration filter device is disposed between the preparation tank and the liquid storage tank.
Accordingly, since a residual liquid is generated in the rising pipe section between the preparation tank and the filtration filter, the residual liquid is recovered in the invention of claim 2.

In the invention of claim 3, the filtration filter device is provided at an upper position with respect to the installation surface relative to the preparation tank, and a rising pipe section is provided between the preparation tank and the filtration filter. It is characterized by being.
Accordingly, in the invention described in claim 3, since a residual liquid is generated in the rising pipe section between the preparation tank and the filtration filter, the residual liquid is recovered.

  In the invention of claim 4, a rising pipe portion extending from the preparation tank and arranged to rise above the installation surface from the height position of the liquid feed hole of the preparation tank, and the rising pipe An extended pipe line extending from the upper end of the road along the installation surface; an exhaust pipe branched from the extended pipe; and the filtration filter device branched from the extended pipe It is comprised by the liquid feeding pipe part provided with.

  Therefore, in the invention according to claim 4, the residual liquid generated in the rising pipe section is supplied with pressurized air whose flow rate is controlled, so that the air flows through the extended pipe section. Flows out into the atmosphere from the exhaust pipe section, and the residual liquid is fed from the liquid feed pipe section to the liquid storage tank via the filtration filter.

In the invention according to claim 5, the liquid feeding of the remaining liquid is the inner diameter of the pipe forming the pipe, the pressure of the air supplied into the pipe, the flow velocity of the air, and the It is controlled by the supply time of pressurized air.
That is, the amount of residual liquid generated in the pipe line is determined by the inner diameter of the pipe and the pressure of the air (pumping pressure) supplied into the pipe line for liquid pumping. Therefore, on this assumption, in order to send the residual liquid, how to control the flow rate of the air and how long to supply the air at the flow rate is determined by the residual liquid in the pipe according to the present invention. This is the gist of the liquid feeding method.

  In the invention according to claim 6, the rising pipe section is 1 m, the extended pipe section is 1 m, the liquid feeding pipe section is 1.3 m, and the pressure of the air is 0.1 MPa. It is characterized by being.

  According to the seventh aspect of the invention, an initial stroke in which the opening degree of the vent valve is reduced and the flow velocity of air pumped into the pipeline is set low, and after the initial stroke, the vent valve And a late stroke for setting a high flow velocity of the air pumped into the pipe.

That is, when the flow rate of the air supplied to the pipe line is set high by increasing the opening degree of the vent valve from the beginning of the liquid supply operation of the residual liquid, the air to which the liquid product as the residual liquid is pumped At the same time, the liquid is fed through the vent valve without being collected outside.
Therefore, in the initial step, the opening degree of the vent valve is reduced and the flow rate of the air pumped into the pipeline is set low, and then in the later stage, the opening degree of the vent valve is increased. Thus, the residual liquid is fed by setting the flow velocity of the air fed into the pipe line high.

In the invention according to claim 8, the opening of the vent valve is set so that the opening gradually increases from the initial process to the later process.
Therefore, in the invention according to claim 8, since the opening degree of the vent valve is gradually increased from the initial stage to the latter stage, the flow rate of the supplied air is smoothly increased. It is comprised so that it may become.

  The invention according to claim 9 is characterized in that the flow velocity of air in the initial stroke is 16 m / s, and the flow velocity of air in the latter stroke is 24 m / s.

  The invention described in claim 10 is characterized in that the inner diameter of the pipe line is 10.5φ or 17.5φ, and the time required from the initial stroke to the later stroke is 3 minutes.

  The invention described in claim 11 is characterized in that the pipe inner diameter is 23.0φ, and the time required from the initial stroke to the later stroke is 5 minutes.

The invention according to claim 12 is characterized in that the liquid is a chemical liquid and the filter of the filtration filter device is a chemical liquid filtration filter.
Therefore, in the invention of the twelfth aspect, the chemical liquid which is the residual liquid can be sent from the conduit and recovered.

  In a thirteenth aspect of the present invention, the filter device includes a filter portion on which a sterilization filter is stacked.

  The invention according to claim 14 is characterized in that the filter is formed to be 0.22 microns.

  In the first, the thirteenth and fourteenth aspects of the invention, even in a pipe line provided with a filtration filter device, the filtration filter is destroyed by adjusting the opening of the vent valve and controlling the air flow rate. The remaining liquid can be separated and sent without air, and the liquid product as a residue remaining in the pipeline of the liquid product manufacturing plant can be effectively recovered. Yield can be improved. In addition, it is possible to reliably feed the residual liquid remaining in the pipe line when the production of the liquid product is completed.

  In the second and third aspects of the invention, the residual liquid generated in the rising pipe section can be reliably recovered between the preparation tank and the filtration filter.

In the invention according to claim 4, the residual liquid generated in the rising pipe part is supplied with pressurized air whose flow rate is controlled, so that the air passes through the extended pipe part. While flowing out from the exhaust pipe into the atmosphere, the residual liquid is recovered through the filtration filter, so that the supplied pressurized air and the residual liquid are reliably separated from each other.
As a result, for example, when the residual liquid is an expensive liquid chemical, the expensive liquid chemical scatters into the atmosphere together with the pressurized air, making it impossible to recover sufficiently. It can be effectively prevented.

  In the invention according to claim 5, the amount of the residual liquid generated in the pipe is determined by the inner diameter of the pipe and the pressure of the air (pumping pressure) supplied into the pipe for liquid pumping. Therefore, in order to send the residual liquid, it is necessary to control from the viewpoint of how to control the flow rate of the air and how long to supply the air at the flow rate. The items are only “flow rate of pressurized air” and “supply time of pressurized air”, and it is possible to provide a method of feeding the residual liquid in the pipe line with easy control work.

  In the invention described in claim 6, since the pressure of the air is 0.1 MPa, the pressure is usually the same as the pressure used for transporting the liquid product, and a special pressure is set. Therefore, it is possible to provide a method for feeding the residual liquid in the pipe line that can be easily controlled.

  According to the seventh aspect of the invention, an initial stroke in which the opening degree of the vent valve is reduced and the flow velocity of air pumped into the pipeline is set low, and after the initial stroke, the vent valve And the latter stage of setting the flow velocity of the air pumped into the pipe line high, and the opening of the vent valve is increased from the beginning of the residual liquid feeding operation. When the flow rate of the air supplied into the pipeline is set high, the situation where the liquid product, which is the residual liquid, is pumped together with the pumped air without being collected outside via the vent valve is prevented. Therefore, for example, in the case where the liquid product is an expensive chemical solution, the gas-liquid can be reliably recovered in a particularly separated form.

  In the inventions according to claims 8 and 9, since the opening degree of the vent valve is gradually increased from the initial stage to the latter stage stage, the flow rate of the air supplied into the pipeline is increased. Even when there is a bent portion of the pipeline, there is an effect that the liquid is smoothly fed through the pipeline without particularly staying.

  In the inventions according to the tenth and eleventh aspects, the required time from the initial stroke to the late stroke is 3 minutes or 5 minutes, so that the residual liquid can be sent in a short time from the pipeline.

  In the invention according to claim 12, when the chemical liquid is a residual liquid, the chemical liquid whose manufacturing cost is higher than that of liquid food or the like can be reliably fed from the pipeline and collected. This makes it possible to improve the recovery rate of expensive liquid products and improve the yield.

  Hereinafter, based on the embodiment shown in the accompanying drawings, the present invention will be described in detail based on an experimental device created for verifying the present invention.

  The method for feeding the residual liquid in the pipeline according to the present embodiment is a method for feeding the residual liquid in the pipeline, in which the liquid remaining in the pipeline 30 is fed by pressurized air and sent. The pipe line 30 is provided with a filtration filter device 16 for filtering the liquid, and the liquid remaining in the pipe line by controlling the flow rate of the air by adjusting the opening degree of the vent valve 20 provided in the pipe line 30. Is separated from the air and fed.

The pipe line 30 is formed between a preparation tank 10 for preparing a liquid product and a filling machine 34 for filling the container with the liquid product, and a liquid storage tank 33 is provided between the preparation tank 10 and the filling machine 34. The filtration filter device 16 is disposed between the preparation tank 10 and the liquid storage tank 33.
The filtration filter device 16 is provided at an upper position with respect to the installation surface G relative to the preparation tank 10, and a rising pipe section 12 is provided between the preparation tank 10 and the filtration filter device 16. Yes.
A rising pipe section 12 that extends from the preparation tank 10 and rises above the installation surface G from the height position of the liquid feeding hole section 36 of the preparation tank 10, and an upper end section of the rising pipe section 12 A horizontal pipe section 14 extending along the installation surface G, an exhaust pipe section 21 branched from the horizontal pipe section 14, a branching pipe from the horizontal pipe section 14, and the filtration filter device 16. And the liquid feeding pipe section 50.

In the present embodiment, the liquid is a chemical liquid, and the filter of the filtration filter device 16 is constituted by a chemical liquid filtration filter. The filtration filter device 16 includes a general sterilization filter unit, and the sterilization filter unit includes a filter intended for sterilization of the filter 0.22 microns.
The liquid supply of the remaining liquid is pressurized by the length of the pipe line 30, the inner diameter of the pipe forming the pipe line 30, the pressure of the air supplied into the pipe line, the flow rate of the air, and the pressure. Controlled by the air supply time.

The rising pipe section 12 is 1 m, the horizontal pipe section 14 is 1 m, the liquid feeding pipe section 50 is 1.3 m, and the air pressure is 0.1 MPa.
An initial stroke in which the opening degree of the vent valve 20 is reduced and the flow rate of air pumped into the pipe line 30 is set low, and after the initial stroke, the opening degree of the vent valve 20 is increased. And a later stage for setting a higher flow rate of the air fed into the pipe line 30, and the opening degree of the vent valve is set so that the opening degree gradually increases from the initial process to the later stage process. ing.

The flow velocity of air in the initial stroke is 16 m / s, and the flow velocity of air in the latter stroke is set to 24 m / s.
When the pipe inner diameter is 10.5φ or 17.5φ, the required time from the initial stroke to the later stroke is set to 3 minutes, and when the pipe inner diameter is 23.0φ, the initial The time required from the stroke to the later stroke is set to be 5 minutes.

[Example]
The present invention according to the above configuration was carried out in the pipeline between the preparation tank 10 and the filtration filter device 16 disposed in the pipeline 35.

1. As shown in FIG. 1, the experimental apparatus was constituted by the pipe line 30 and the preparation tank 10 to carry out the present invention. The preparation tank 10 is formed in a cylindrical shape and can store 100 L of liquid. The pipe line 30 extends from a lower end part of the preparation tank 10 extending substantially horizontally outwardly, and from a downstream end part of the extension pipe part 11 so as to rise substantially vertically. A rising pipe section 12 provided; a horizontal pipe section 14 extending substantially horizontally from the upper end of the rising pipe section 12 via valves 13a and 13b; and a downstream of the horizontal pipe section 14. Connected to the first branch pipe part 18 connected to the side end part, the exhaust part 38 connected to the upper side end part of the first branch pipe part 18, and the lower side end part of the first branch pipe part 18 The drainage part 39 is made up of.

  The exhaust part 38 includes a sight glass 17 which is a glass member connected to the upper end of the first branch part 18, a second branch pipe 28 connected to the downstream side of the sight glass 17, A pressure gauge 23 disposed in the second branch pipe 28, a vent valve 20 disposed at the downstream end of the second branch pipe 28, and a flow meter 22 disposed downstream of the vent valve 20. And an exhaust pipe portion 21 fixed to the downstream side of the flow meter 22.

The liquid feeding part 39 includes a filtration filter 16 connected to the lower end of the first branch pipe 18 and a liquid feeding pipe part 50 connected to the filtration filter 16.
In the figure, reference numeral 24 denotes a compressed air supply source, and reference numeral 25 denotes an open / close valve of the compressed air supply source. Reference numeral 51 denotes an open / close valve for each pipe line.

  The length of each pipe line part in the experimental device 29 according to the present embodiment is as follows. The extension pipeline portion 11 is 1 m, and the horizontal pipeline portion 14 is 1.5 m. Moreover, the said horizontal pipe part 14 is arrange | positioned with the gradient of 1/50 toward the downstream direction.

  In this embodiment, as shown in FIG. 2, a “skeleton pipe” 26 made of polycarbonate and configured to be visible inside is used, and as shown in FIG. 11. The skeleton pipe 26 is used for the horizontal pipe section 14 and the liquid feed pipe section 50, and the transport state of the residual liquid inside is visible. Further, stainless steel pipes are used for the joints of these “skeleton pipes” 26, the first branch pipe 18, the second branch pipe 28, and the exhaust pipe 21.

In the pipe line 30 configured in this way, the water added with food red is stored in the preparation tank 10, the valve 25 is opened, and the compressed air from the compressed air supply source 24 is introduced into the preparation tank 10. Water was pressurized and supplied into the conduit 30.
In the experimental apparatus 29 shown in FIG. 1, each valve | bulb 51 is arrange | positioned in the site | part similar to the pipe line arrange | positioned at each liquid product manufacturing plant. In addition, the state of the residual liquid in the rising conduit portion 12 is confirmed at the valve 51a disposed at the joint portion between the rising conduit portion 12 and the extending conduit portion 11.

2. Status of Residual Liquid In the pipe line 30 as described above, the residual liquid is generated in the rising pipe part 12 and the extension pipe part 11. Table 1 describes data acquired in relation to the inner diameter of the pipe constituting the pipe line, the applied pumping pressure, and the amount of residual liquid. As is apparent from Table 1, the amount of residual liquid in this experimental apparatus differs depending on the pipe diameter and the pressure of the compressed air supplied from the compressed air supply source 24.

Table 1 shows the amount of residual liquid in the pipe after normal pressure feeding in the case where the liquid residual liquid feeding method according to the present invention is not carried out. “8A”, “15A”, and “1S” indicate skeleton pipes having different inner diameters. That is, “8A” is 10.5φ, “15A” is 17.5φ, and “1S” is 23.0φ. Under this condition, the remaining liquid amount in each pipe is acquired as data when the pumping pressure is “0.05 MPa”, “0.1 MPa”, “0.2 MPa”, and “0.3 MPa”, respectively. Yes.

[Table 1]

3. Three points of view of residual liquid feeding work
1. Compressed air pressure for transferring residual liquid Compressed air pressure is not necessarily high. It has been recognized that a pressure of about 0.1 MPa is sufficient for the residual liquid feed.

2. Operation of the vent valve 20 As a premise, the compressed air supplied from the compressed air supply source 24 and the residual liquid need to be separated and sent.

  Compressed air can be fed by opening the vent valve 20. However, the opening degree of the vent valve 20 is a problem, and when the opening degree of the vent valve 20 is too large, the exhaust pipe portion 21 is open to the atmosphere, so that the gas and liquid are not separated. Since the liquid is sent from the exhaust pipe part 21 to the atmosphere via the valve 20, the gas and liquid are surely separated, the pressurized air is sent from the exhaust pipe part 21 to the atmosphere and the residual liquid is filtered. It is necessary to collect it by filtering through the.

  Therefore, it is necessary to devise how to open the vent valve 20. In the initial stage of the operation for feeding the residual liquid, the opening degree of the vent valve 20 is set small, and then the opening degree is gradually increased. As a result of experiments, it has been found that the flow rate of compressed air is gradually increased from 0 to separate the gas and liquid, and the residual liquid can be recovered through a filtration filter.

  In this experimental example, the opening degree of the vent valve 20 is reduced, and an initial stroke in which the flow velocity of the air fed into the pipe line 30 is set low, and after the initial stroke, This is performed by a later stage in which the opening degree is increased and the flow rate of air pumped into the pipe is set high.

  The flow velocity of air in the initial stroke is 16 m / s, and the flow velocity of air in the late stroke is 24 m / s. In addition, as shown in Tables 1 and 2, the time required for the initial process and the latter process varies depending on the inner diameter of the pipe constituting the pipe 30. It is 3 minutes when the inner diameter of the pipe is 10.5φ and 17.5φ, and 5 minutes when the inner diameter is 23.0φ.

3. About the number of times of pumping The number of times of pumping itself has been found as a result of the experiment that it is not directly related to the residual liquid recovery work.

4). Implementation Conditions In this experimental apparatus 29, the valve 25 is opened to introduce compressed air from the compressed air supply source 24 into the preparation tank 10, and a pressure of 0.1 MPa with respect to the water stored in the preparation tank 10 The compressed water was supplied and the water was pumped into the pipe 30. Thereafter, the opening of the vent valve 20 was reduced and the air flow rate was set to 16 m / s, and the pressure was fed (initial stroke).

  In this state, it was visually confirmed that the water in the rising pipe portion 12 was rising little by little. In this case, the water that has completely risen through the rising pipe section 12 enters the second horizontal pipe section 14 and is sent to the filtration filter 16. Thereafter, the opening degree of the vent valve 20 is gradually increased, and the air flow rate in the pipe line 30 is set to be 24 m / s (late stage).

  In the present experimental example, the vent valve 21 is constituted by a ball valve, and the opening degree in the initial process is about 10%, and the opening degree in the later stage process is about 30%.

In this case, the relationship between the air flow rate and the residual liquid amount is clear from Table 2. That is, after the normal pumping operation of the liquid product, the method for feeding the residual liquid in the pipe line according to the present invention is performed.
[Table 2]

  In this case, as shown in Table 2, when the skeleton pipe 1S (inner diameter φ23.0) shown in Table 1 is taken as an example, water at a pumping flow rate of 400 L / min (N) is pumped at a flow rate of 16 m / s. In the rising pipe section 12, 10.9 g of water was confirmed in the first experiment and 11.1 g of water was confirmed in the second experiment. Further, when water with a pumping flow rate of 500 L / min (N) was pumped at a flow rate of 20 m / S, a residual liquid amount of 1.0 g was confirmed in the first experiment and 1.2 g in the second experiment. It was. And it has been confirmed as test data that when the water at a pumping flow rate of 600 L / min (N) is pumped at a flow rate of 24 m / S, the residual liquid amount becomes 0 g in about 5 minutes.

  3 and 4 show an enlarged view of the joint portion 27 between the horizontal pipe section 14 and the first branch pipe section 18. As described above, the filtration filter 17 is disposed at the lower end portion of the first branch pipe portion 18. A second branch pipe 28 is disposed at the upper end portion of the first branch pipe 18 via a sight glass 16, and a pressure gauge 23 is disposed at the upper end portion of the second branch pipe portion 28. A vent valve 20 is attached to the downstream end of the second branch pipe portion 28, a flow meter 22 is attached to the downstream side of the vent valve 20, and an exhaust pipe 21 is fixed to the downstream side of the flow meter 22. ing. In the figure, A indicates the flow of pressurized air, and W indicates the flow of water.

  In the present embodiment, as described above, in the initial state (initial process) of pressure feeding for feeding the residual liquid, the opening degree of the vent valve 20 is decreased and the opening degree is gradually increased from this state. In the initial stroke, the flow velocity of air is set to 16 m / s, and when the flow velocity is set higher, the liquid also flows outward from the vent valve 20 due to the pressure of air. Although the liquid is sent, since the flow rate is low, the air A in the residual liquid W is sent outward from the vent valve 20, and the residual liquid W is flowed from the vent valve 20 through the filtration filter 17. 22, the liquid W is sent from the exhaust pipe 21 to the outside of the pipe line, and the water W is not sent from the exhaust pipe 21 to the outside of the pipe together with the air A. The paper was placed and checked.

  On the other hand, the residual liquid W is separated from the air A in the first branch pipe section 18 and sent to the outside of the pipe 30 through the filtration filter 16 disposed below the first branch pipe section 18. Is done. As shown in FIG. 8, this state is the same in the second stroke in which the opening degree of the vent valve 20 gradually increases and the flow velocity becomes 24 m / s after the middle stage of pumping. Are fed in a separated state.

Table 3 (1) shows the amount of residual liquid in the conventional liquid feeding operation. Residual liquid is generated according to the pipe inner diameters 8A to 1S and simultaneously according to the pumping pressure.
On the other hand, as shown in Table 3 (2), when the liquid product feeding method according to the present embodiment was performed, the diameter was 3 minutes when the diameter was 10.5φ (8A). In the case of 17.5φ (15A), it was confirmed that the residual liquid amount became 0 in 3 minutes, and in the case of 23φ (1S), the residual liquid amount became 0 in 5 minutes.
[Table 3]

(1) (2)

  The method for feeding a residual liquid in a pipe line according to the present invention is widely applied to an operation of collecting a liquid product remaining after the liquid product is conveyed in a pipe line provided with a filtration filter.

FIG. 1 is an embodiment showing a method for feeding a residual liquid in a pipe line according to the present invention, and is a pipe as an experimental apparatus that reproduces a rising pipe line formed between a preparation tank and a filtration filter in a liquid production plant. It is a conceptual diagram which shows a road structure. 1 is a photograph showing a skeleton pipe used in a pipe line as an experimental apparatus for carrying out a liquid sending method for residual liquid in a pipeline according to an embodiment of the present invention. It is. 1 is an embodiment showing a method for feeding residual liquid in a pipeline according to the present invention, and is a filtration filter in a pipeline configuration to which the method for feeding residual liquid in a pipeline according to the present embodiment is applied. It is a figure which expands and shows the site | part in which this is provided notionally. 1 is an embodiment showing a method for feeding residual liquid in a pipeline according to the present invention, and is a filtration filter in a pipeline configuration to which the method for feeding residual liquid in a pipeline according to the present embodiment is applied. It is a figure which expands and shows the site | part in which this is provided notionally. In the liquid product manufacturing plant, the adjustment tank, the filtration filter, and the liquid storage tank are disposed on the second floor of the plant, and the filling machine is disposed on the first floor. Further, the pipe line between them is gradually lowered in height. It is a figure which shows notionally the state provided in step shape so that it may become. It is a figure which shows notionally the case where a preparation tank, a filtration filter, a liquid storage tank, and a filling machine are arrange | positioned in the same floor in a liquid product manufacturing plant.

DESCRIPTION OF SYMBOLS 10 Preparation tank 11 Extension pipe part 12 Standing pipe part 13 Valve 14 Horizontal pipe part 16 Filtration filter device 17 Sight glass 18 First branch pipe 20 Vent valve 21 Exhaust pipe part 22 Flow meter 23 Pressure gauge 24 Compressed air supply Source 25 Valve 26 Skeleton pipe 27 Joint part 28 Second branch pipe 29 Experimental device 30 Pipe line 31 Preparation tank 32 Filtration filter device 33 Liquid storage tank 34 Filling machine 35 Pipe line 50 Liquid feed pipe part 51 Opening and closing valve G Installation surface A Air W residual liquid

Claims (14)

A method for feeding residual liquid in a pipeline by feeding the liquid remaining in the pipeline with pressurized air and feeding the liquid, wherein the pipeline is provided with a filtration filter device for filtering the liquid, In the above, the flow rate of air is controlled by adjusting the opening degree of a vent valve provided upstream from the filtration filter device , and the liquid remaining in the pipeline is separated from the air and sent. To feed residual liquid in the pipeline.   The pipe line is formed between a preparation tank for preparing a liquid product and a filling machine for filling the container with the liquid product, and a liquid storage tank is disposed between the preparation tank and the filling machine. The method for feeding a residual liquid in a pipeline according to claim 1, wherein the filtration filter device is disposed between the preparation tank and the liquid storage tank.   The said filtration filter apparatus is provided in the upper position on the installation surface rather than the said preparation tank, and the standing line part is provided between the said preparation tank and the said filtration filter, It is characterized by the above-mentioned. The method for feeding the residual liquid in the pipeline as described.   A rising pipe section that extends from the preparation tank and rises upward from the height position of the liquid feeding hole of the preparation tank, and is arranged along the installation plane from the upper end of the rising pipe section. An extended pipe line part, an exhaust pipe part branched from the extended pipe part, and a liquid feed pipe part branched from the extended pipe part and provided with the filtration filter device. The method for feeding a residual liquid in a pipe line according to claim 3, wherein:   The remaining liquid is fed by the length of the pipe, the inner diameter of the pipe forming the pipe, the pressure of the air supplied into the pipe, the flow rate of the air, and the pressurized air. The method for feeding a residual liquid in a pipeline according to any one of claims 1, 2, 3 and 4, wherein the liquid feeding time is controlled by the supply time of the pipe.   2. The rising pipe section is 1 m, the extended pipe section is 1 m, the liquid feeding pipe section is 1.3 m, and the air pressure is 0.1 MPa. 5. A method for feeding a residual liquid in a pipeline according to any one of items 3 and 4.   An initial stroke in which the opening degree of the vent valve is reduced and the flow rate of air pumped into the pipeline is set low, and after the initial stroke, the opening degree of the vent valve is increased and the pipeline is The method for feeding a residual liquid in a pipeline according to claim 1, 2, 3, 4, 5 or 6, further comprising a later stage for setting a high flow rate of the air fed into the pipe.   8. The method for feeding residual liquid in a pipe line according to claim 7, wherein the opening degree of the vent valve is set so that the opening degree gradually increases from an initial process to a later stage process.   9. The method for feeding residual liquid in a pipe line according to claim 7 or 8, wherein the flow velocity of air in the initial stroke is 16 m / s and the flow velocity of air in the latter stroke is 24 m / s.   10. The pipe inner diameter is 10.5φ or 17.5φ, and the required time from the initial stroke to the later stroke is 3 minutes. 2. A method for feeding a residual liquid in a pipeline according to item 1.   10. The pipe inner diameter is 23.0φ, and the time required from the initial stroke to the late stroke is 5 minutes. The method for feeding the residual liquid in the pipeline as described.   2. The method for feeding a residual liquid in a pipeline according to claim 1, wherein the liquid is a chemical liquid and the filter of the filtration filter device is a chemical liquid filtration filter.   The method for feeding a residual liquid in a pipeline according to claim 1, wherein the filter device includes a sterilizing filter.   14. The method for delivering a residual liquid in a pipeline according to claim 13, wherein the sterilizing filter is formed at 0.22 microns.