JP2017170277A - Apparatus for manufacturing bubble-containing liquid and method for using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for manufacturing bubble-containing liquid, comprising a microbubble generator which is easily maintained, and a suitable method for using bubble-containing liquid.SOLUTION: A apparatus 1 for manufacturing bubble-containing liquid BLQ comprises a microbubble generator 10 which has: a housing 10H having a gas inflow port 10J, a liquid inflow port 10I, and a liquid outflow port 10D; and a bubble-generating element 10K, and in which the housing and the bubble-generating element configures a gas chamber GR and a liquid chamber LR, liquid LQ is flown from the liquid inflow port into the liquid chamber and gas GA is supplied from the gas inflow port into the gas chamber to generate microbubbles BB of the gas from the bubble-generating element into the liquid, and the bubble-containing liquid BLQ is flown from the liquid outflow port. The apparatus 1 further comprises; a gas supply route GS that supplies the gas GA into the gas inflow port; a liquid upstream route LSU that flows the liquid into the liquid inflow port; a pump PU that force-feeds the liquid LQ into the liquid inflow port; and a liquid downstream route LSD that flow the bubble-containing liquid, the gas supply route having a gas valve 31, the liquid upstream route LSU having an upstream valve 21, and the liquid downstream route LSD having a downstream valve 22.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an apparatus for producing a bubble-containing liquid in which bubbles are included in a liquid, and a method for producing the same.

  In recent years, the usefulness of techniques using microbubbles called microbubbles and nanobubbles has attracted attention. For example, cleaning technology using liquids containing microbubbles, sterilization and deodorization of water, generation of ozone water, health and medical equipment fields, water purification of lakes and farms, various wastewater treatment such as factories and livestock, and The use for the production of functional water such as hydrogen water is under consideration.

  Devices having various structures have been proposed as manufacturing devices for producing such bubble-containing liquid by generating such microbubbles and nanobubbles (see, for example, Patent Documents 1 to 3).

JP2011-224461A JP 2013-34976 A JP 2009-101299 A

  As an apparatus for producing such a bubble-containing liquid, a microbubble in which a bubble generating element such as a pipe-shaped bubble generating tube made of a porous body is held in a housing, and a gas chamber and a liquid chamber are constituted by the housing and the bubble generating element. In the generator, the liquid flows from the liquid upper flow path to the liquid chamber, the gas is supplied from the gas supply path to the gas chamber, microbubbles are generated in the liquid via the bubble generating element, and the bubble-containing liquid is supplied from the liquid chamber. There is an apparatus for producing a bubble-containing liquid of the type that causes the liquid to flow into the sub-flow channel. In the bubble-containing liquid manufacturing apparatus of this aspect, the pressure of the gas outside the porous pipe is increased relative to the liquid pressure of the liquid in the porous pipe to generate gas microbubbles in the liquid.

  However, among the bubble-containing liquid manufacturing apparatuses, there are cases where it is desired to maintain the microbubble generator, such as cleaning the microbubble generator or replacing the bubble generating element. In such a case, it is necessary to disassemble the housing of the microbubble generator, but the microbubble generator is connected to the liquid supply channel and the liquid flow channel in addition to the gas supply path. The maintenance of the microbubble generator is troublesome because it is necessary to drain the liquid.

  The present invention has been made in view of such problems, and provides an apparatus for producing a bubble-containing liquid in which maintenance of the microbubble generator is easy, and a method for using an appropriate apparatus for producing a bubble-containing liquid. is there.

  One aspect of the present invention for solving the above problems includes a housing having a gas inlet, a liquid inlet, and a liquid outlet, and a bubble generating element that is held in the housing and is made of a porous body. The housing and the bubble generating element are surrounded by a part of the housing and the bubble generating element, and are connected to the gas inlet, the other part of the housing and the bubble generating element. A liquid chamber that is surrounded by and communicates with the liquid inflow port and the liquid outflow port, allows liquid to flow into the liquid chamber from the liquid inflow port, and allows gas to flow into the gas chamber from the gas inflow port. A gas bubble generating device for generating the gas microbubbles in the liquid from the bubble generating element and causing the bubble-containing liquid to flow out from the liquid outlet; and the gas inlet for connecting the gas flow To the entrance above A gas supply path for supplying a body; a liquid upper flow path connected to the liquid flow inlet for flowing the liquid to the liquid flow inlet; and a pump for pumping the liquid to the liquid flow inlet through the liquid upper flow path And a sub-flow channel that is connected to the liquid outlet and that allows the bubble-containing liquid to flow from the liquid outlet, and the gas supply path opens and closes the gas flow to the gas inlet. The liquid upstream channel has an upstream valve that opens and closes the flow of the liquid to the liquid inlet, and the liquid lower channel opens and closes the flow of the bubble-containing liquid from the liquid outlet. It is an apparatus for producing a bubble-containing liquid having a downstream valve.

  In this bubble-containing liquid manufacturing apparatus (hereinafter, also simply referred to as a manufacturing apparatus), a microbubble generator can be used without discharging the liquid upstream of the upstream valve and the bubble-containing liquid downstream of the downstream valve. Internal maintenance and replacement of bubble generating elements can be performed.

  Among these manufacturing apparatuses, the microbubble generator includes, for example, a plate-like, hemispherical, and spherical shell-like porous body used as a bubble generating element, and a gas chamber and a liquid between the housing and the bubble generating element. The thing which comprised the room is mentioned. Also, a gas generating chamber and a liquid chamber are constituted by the housing and the bubble generating tube using a bubble generating tube having a porous porous body, and then gas is supplied inside the bubble generating tube and liquid is supplied outside. The thing which made it do, and the thing which supplied the liquid inside the bubble generation tube and gas outside are also mentioned.

Examples of the porous body include porous ceramics made of oxide ceramics such as alumina, titania, silica, mullite, and zirconia, nitride ceramics such as silicon nitride, and carbide ceramics such as silicon carbide. In addition, a porous metal made of a metal such as stainless steel, aluminum, copper alloy, nickel alloy, or titanium alloy can also be used.
When a porous body having a pore diameter D of D (10) ≦ 2 μm is used, microbubbles having a diameter of 1 μm or less can be efficiently generated and blown into the liquid. Therefore, it is particularly preferable. As a method for measuring the pore size distribution, for example, a mercury intrusion method is used. D (10) is the pore diameter that occupies the top 10% of the larger diameter side in the total pore volume in the obtained cumulative pore diameter distribution curve.

  As the gas valve, upstream valve, and downstream valve, various valves used for gas operation and liquid operation such as a butterfly valve, a ball valve, and a diaphragm valve can be used. In addition to manual valves that are manually opened and closed, automatic valves such as electromagnetic valves, electric valves, pneumatic valves, and hydraulic valves can also be used.

  In addition, liquids containing microbubbles include water-based liquids such as pure water, drinking water, seawater, various culture solutions, various aqueous solutions, various sewage, and oils such as organic solvents, edible oils, and mineral oils. And various other liquids. In addition, examples of the gas included in the liquid as microbubbles include various gases such as air, oxygen, ozone, chlorine gas, hydrogen, nitrogen, and carbon dioxide.

  The bubble-containing liquid manufacturing apparatus, wherein the gas valve is a gas automatic valve composed of an automatic valve, the upstream valve is an upstream automatic valve composed of an automatic valve, and the downstream valve is composed of an automatic valve. It is preferable that the apparatus includes a bubble-containing liquid manufacturing apparatus including a control unit that controls driving of the pump and opening / closing of the gas automatic valve, the upstream automatic valve, and the downstream automatic valve.

  In this manufacturing apparatus, since each valve is an automatic valve and has a control unit for controlling the pump and the pump, the pump is driven in an appropriate order and timing by the control unit when starting, stopping, and operating the manufacturing apparatus. It is possible to perform operations such as stopping, opening and closing each valve.

As the automatic valve, an electromagnetic valve or an electric valve can be used. Also, an air pressure valve or a hydraulic valve that opens and closes the valve with air pressure or oil pressure can be used. Among these, it is preferable to use an electromagnetic valve or an electric valve in that it can be directly controlled by an electric signal, and it is preferable to use an electromagnetic valve in terms of response speed. On the other hand, a pneumatic valve or a hydraulic valve can be used for explosion prevention.
As the control unit, a PLC (programmable logic controller) or a microcomputer can be used.

  Furthermore, in the above-mentioned bubble-containing liquid manufacturing apparatus, the control unit closes the gas automatic valve in addition to stopping the pump when stopping the bubble-containing liquid manufacturing apparatus, and the upstream automatic valve And it is good to set it as the manufacturing apparatus of the bubble containing liquid which closes the said downstream automatic valve.

  When the pump of this manufacturing apparatus is stopped, the liquid pressure of the liquid decreases to almost zero downstream of the pump. On the other hand, not only when the gas automatic valve is not closed, but also when the gas automatic valve is closed, the air pressure in the gas chamber is reduced only by the amount of gas reduction due to bubbles, and thus is maintained at a high value. For this reason, in the microbubble generator, the differential pressure (= atmospheric pressure−hydraulic pressure), which is the difference between the atmospheric pressure in the gas chamber and the liquid pressure in the liquid chamber, becomes large, and a large amount of gas is blown into the liquid in the liquid chamber. Therefore, large bubbles expand not only in the liquid chamber but also in the liquid upper flow path and the liquid lower flow path. For this reason, in order to restart this manufacturing apparatus, troubles such as the need to remove the bubbles have occurred.

On the other hand, in this manufacturing apparatus, the control unit not only stops the pump but also closes the upstream automatic valve and the downstream automatic valve. For this reason, by stopping the manufacturing apparatus, even if gas is blown into the liquid in the liquid chamber, large bubbles may spread over the upstream automatic valve and the downstream automatic valve and spread into the liquid flow path and liquid flow path. Is prevented.
In addition, by closing the gas automatic valve, the atmospheric pressure in the gas chamber can be reduced by the amount of gas consumed as bubbles, compared to when the gas automatic valve is left open.
Moreover, even after the upstream automatic valve and the downstream automatic valve are closed, the gas tries to generate bubbles in the liquid in the liquid chamber due to the residual pressure in the gas chamber. In the closed liquid chamber, the liquid pressure of the liquid rises when bubbles are blown in, so that a large amount of gas is converted into liquid by suppressing the blowing of bubbles up to the magnitude of the differential pressure that balances atmospheric pressure and liquid pressure. There is also an advantage that is not blown.

  When closing the upstream automatic valve and the downstream automatic valve, avoid abrupt closing to alleviate the occurrence of water hammer on the upstream side of the valve and the decrease in hydraulic pressure due to water column separation on the downstream side. The closing speed of the should be slow. Also, when stopping the pump, control to reduce the stop speed by avoiding a sudden stop in order to mitigate the occurrence of water hammer on the upstream side of the pump and the decrease in hydraulic pressure due to water column separation on the downstream side. It is good to do.

  Furthermore, in the above-described bubble-containing liquid manufacturing apparatus, the control unit is configured to close the gas automatic valve before stopping the pump when the bubble-containing liquid manufacturing apparatus is stopped. Good.

After stopping the manufacturing apparatus, it is preferable to lower the pressure (residual pressure) of the gas chamber in consideration of the blowing of gas into the liquid chamber.
In this manufacturing apparatus, when the manufacturing apparatus is stopped, the gas automatic valve is closed early to reduce the pressure (residual pressure) of the gas in the gas chamber after the manufacturing apparatus is stopped, and the liquid in the liquid chamber is stopped during the stop. The amount of bubbles blown can be suppressed.

  Furthermore, the bubble-containing liquid manufacturing apparatus according to any one of the above, wherein the bubble generation element is a pipe-shaped bubble generation tube made of a porous body, and the liquid is circulated in the bubble generation tube. It is preferable to use a bubble-containing liquid manufacturing apparatus.

  In a manufacturing apparatus including a microbubble generator using a bubble generating tube as a bubble generating element, the area of the bubble generating tube in contact with the liquid is large, and more bubbles can be blown into the liquid.

The bubble generating tube has at least a central portion (central portion in the longitudinal direction) between one end portion and the other end portion of the bubble generating tube connected to a porous body, specifically, a three-dimensional network. It consists of a porous body constituting a large number of ventilation paths. For example, a bubble generating tube in which the entire bubble generating tube is made of a porous material such as porous ceramics can be mentioned.
In addition, while the central portion (the central portion in the longitudinal direction) is made of a porous body, the one end and the other end are made of a dense material, or the whole is made of a porous body. As for the other end, a bubble generating tube in which the pores are closed by impregnating with glass, resin, molten metal or the like to eliminate air permeability is also included.

  As for the shape of the bubble generating tube, in addition to the shape in which the cross-sectional shape does not change in the axial direction, such as a circular tube or a rectangular tube, the shape of the bubble generating tube narrows toward the one side in the axial direction such as a truncated cone shape or a truncated pyramid shape. It may be a shape or a shape whose diameter changes periodically as it advances in the axial direction. Moreover, in addition to the straight tubular form in which the axis extends linearly, the form in which the axis is bent in a U shape, a meandering shape, or a spiral shape may be used. Further, the bubble generating tube may be a single tube having one through hole inside, or a multi-hole tube having many through holes. Further, the bubble generating tube may be one or plural.

  And a housing having a gas inlet, a liquid inlet, and a liquid outlet, and a bubble generating element that is held in the housing and is made of a porous body. The housing and the bubble generating element include the housing And the bubble generating element, the gas chamber communicating with the gas inlet, the other part of the housing and the bubble generating element, and the liquid inlet and the liquid outlet. A liquid chamber communicating with the liquid chamber, and a liquid is introduced into the liquid chamber from the liquid inlet, and a gas is supplied to the gas chamber from the gas inlet, and the bubble generating element enters the liquid. A microbubble generating device that generates microbubbles of the gas and causes the bubble-containing liquid to flow out of the liquid outlet; a gas supply path that is connected to the gas inlet and supplies the gas to the gas inlet; Above liquid A liquid upstream channel for connecting the liquid to the liquid inlet, a pump for pumping the liquid to the liquid inlet via the liquid upstream channel, and a liquid outlet for connecting the liquid to the liquid inlet. A sub-flow channel for flowing the bubble-containing liquid from the outlet, the gas supply path has a gas valve for opening and closing the flow of the gas to the gas inlet, and the liquid channel is Use of an apparatus for producing a bubble-containing liquid having an upstream valve that opens and closes the flow of the liquid to the inflow port, and the downstream flow path includes a downstream valve that opens and closes the flow of the bubble-containing liquid from the liquid flow outlet A method for stopping the bubble-containing liquid producing apparatus, the step of stopping the pump being driven, the step of closing the gas valve, the step of closing the upstream valve, and the step of closing the downstream valve When A method of using a production apparatus of the bubble-containing liquid with a.

  In this manufacturing apparatus, when the pump is stopped, the liquid pressure of the liquid is reduced to almost zero downstream of the pump. On the other hand, not only when the gas valve is not closed, but also when the gas valve is closed, the atmospheric pressure in the gas chamber is kept high because it is reduced only by the amount of gas that is reduced by bubbles. For this reason, in the microbubble generator, the differential pressure (= atmospheric pressure−hydraulic pressure), which is the difference between the atmospheric pressure in the gas chamber and the liquid pressure in the liquid chamber, becomes large, and a large amount of gas is blown into the liquid in the liquid chamber. Therefore, large bubbles expand not only in the liquid chamber but also in the liquid upper flow path and the liquid lower flow path. For this reason, in order to restart this manufacturing apparatus, troubles such as the need to remove the bubbles have occurred.

On the other hand, in the method of using the bubble-containing liquid manufacturing apparatus, not only the pump is stopped, but the upstream valve and the downstream valve are closed. For this reason, by stopping the manufacturing apparatus, even when gas is blown into the liquid in the liquid chamber, large bubbles are prevented from spreading over the upstream valve and the downstream valve and spreading into the liquid flow path and liquid flow path. .
Note that by closing the gas valve, the pressure in the gas chamber can be reduced by the amount of gas consumed as bubbles, compared to when the gas valve is left open.
Moreover, even after the upstream valve and the downstream valve are closed, the gas tries to generate bubbles in the liquid in the liquid chamber due to the residual pressure in the gas chamber, but the liquid in which the upstream and downstream valves are closed by the upstream valve and the downstream valve. In the chamber, when the bubbles are blown, the liquid pressure of the liquid rises. Therefore, by blowing the bubbles up to the magnitude of the differential pressure that balances the atmospheric pressure and the liquid pressure, a large amount of gas is not blown into the liquid. There is also.

  Further, in the above method for using the bubble-containing liquid manufacturing apparatus, the gas valve is a gas automatic valve composed of an automatic valve, the upstream valve is an upstream automatic valve composed of an automatic valve, and the downstream valve is The bubble-containing liquid manufacturing apparatus is a downstream automatic valve composed of an automatic valve, and the bubble-containing liquid manufacturing apparatus includes the pump, the gas automatic valve, the upstream automatic valve, and a control unit that controls driving of the downstream automatic valve. It is preferable to use the manufacturing apparatus.

  In this method of using the manufacturing apparatus, each valve is an automatic valve and includes a control unit that controls the pump and each valve. Therefore, the above-described use method can be easily realized using this control unit.

It is explanatory drawing which shows schematic structure of the manufacturing apparatus of the bubble containing liquid which concerns on embodiment. It is explanatory drawing containing the longitudinal cross-sectional view of a microbubble generator among the manufacturing apparatuses of the bubble containing liquid which concerns on embodiment. It is a cross-sectional view of the microbubble generator according to the embodiment. It is a flowchart which shows the procedure of manufacture of a bubble containing liquid. It is a flowchart which shows the procedure of a starting process among manufacture of bubble containing liquid. It is a flowchart which shows the procedure of a stop process among manufacture of bubble containing liquid.

(Embodiment)
A first embodiment will be described with reference to FIGS. Among these, FIG. 1 is explanatory drawing which shows schematic structure of the manufacturing apparatus (henceforth only a manufacturing apparatus) 1 of the bubble containing liquid which concerns on this embodiment. FIG. 2 is an explanatory view including a vertical cross-sectional view schematically showing a cross-sectional structure of a microbubble generator (hereinafter also simply referred to as a generator) 10 in the manufacturing apparatus according to the embodiment, and FIG. 2 is a cross-sectional view of the generator 10. FIG.

  The bubble-containing liquid manufacturing apparatus 1 according to the present embodiment, as schematically shown in FIG. 1, pumps the liquid LQ (for example, water) stored in the tank TK1 by the pump PU and passes through the microbubble generator 10. The bubble-containing liquid BLQ containing the microbubbles BB is manufactured and stored in another tank TK2. In the generator 10 of the manufacturing apparatus 1, the bubble generating element 10K is held in the housing 10H. The gas chamber constituting portion 10HG and the bubble generating element 10K formed by a part of the housing 10H (in FIG. 1, the upper portion of the housing 10H) are surrounded by these and form a gas chamber GR communicating with the gas inlet 10J. Further, the liquid chamber constituting part 10HL and the bubble generating element 10K formed by another part of the housing 10H (in FIG. 1, the lower part of the housing 10H) are surrounded by these and communicated with the liquid inlet 10I and the liquid outlet 10D. Liquid chamber LR.

  In this manufacturing apparatus 1, the liquid LQ pumped by the pump PU is caused to flow into the liquid chamber LR from the liquid inlet 10I connected thereto through the liquid pipe LS. At the same time, the gas GA (for example, air, hydrogen) sent out from the gas cylinder GB and adjusted to 2 atm. By the regulator RG through the gas pipe GS is connected to the generator 10 through the gas inlet 10J. Into the gas chamber GR. Then, the gas GA is blown into the liquid LQ as the microbubble BB via the bubble generating element 10K held in the generator 10, and the bubble-containing liquid BLQ is manufactured, and the tank TK2 is supplied from the liquid outlet 10D. Let it flow toward.

In the manufacturing apparatus 1, as described above, the gas pipe GS forming the gas supply path is connected to the gas inlet 10J of the housing 10H, and the gas GA is supplied to the gas inlet 10J and further to the gas chamber GR. doing. The gas pipe GS is provided with a gas valve 31 that opens and closes the flow of the gas GA to the gas inlet 10J.
In addition, the liquid upstream pipe LSU that forms the liquid flow path in the liquid pipe LS is connected to the liquid inlet 10I of the housing 10H, and supplies the liquid LQ to the liquid inlet 10I and further to the liquid chamber LR. Yes. The liquid upstream pipe LSU is provided with an upstream valve 21 for opening and closing the flow of the liquid LQ to the liquid inlet 10I.
Furthermore, the liquid downstream pipe LSD which forms the liquid flow path in the liquid pipe LS is connected to the liquid outlet 10D of the housing 10H, and the bubble-containing liquid BLQ produced in the liquid chamber LR is tanked from the liquid outlet 10D. It is flowing towards TK2. The liquid downstream pipe LSD is provided with a downstream valve 22 that opens and closes the flow of the bubble-containing liquid BLQ to the liquid outlet 10D.
In addition, a discharge pipe LH is provided on the upstream side (left side in FIG. 2) of the downstream valve 22 in the liquid downstream pipe LSD, and is branched from the liquid downstream pipe LSD. It can be opened and closed with (normally closed).

  In the present embodiment, the gas valve 31, the upstream valve 21, the downstream valve 22, and the discharge valve 23 described above are all butterfly valves. Moreover, the gas valve 31, the upstream valve 21, and the downstream valve 22 are electric valves driven by a motor, and are controlled by a control unit CNT configured by a programmable logic controller (PLC) using a control line CL indicated by a broken line. The opening / closing drive can be controlled. The control unit CNT controls the start, operation, and stop of the pump PU using the control line CL. The discharge valve 23 is manual.

Next, the generator 10 for producing the bubble-containing liquid BLQ will be described (see FIGS. 2 and 3). The generating device 10 includes a plurality (13 in the present embodiment) of bubble generating tubes 110 (corresponding to the bubble generating element 10K in FIG. 1) and a housing 120 (10H) that holds and surrounds the bubbles. This generator 10 is installed so that each bubble generating tube 110 is held horizontally.
Among these, the bubble generating tube 110 has a circular tube shape with a circular cross section, and the whole is made of porous alumina. In FIG. 2, the bubble generating tube 110 has a left end portion as an upstream end portion 112, a right end portion as a downstream end portion 113, and a portion between the upstream end portion 112 and the downstream end portion 113 as a central portion 114. The bubble generating tube 110 measures the pore size distribution using a mercury intrusion method (JIS R1655). In this pore size distribution, if the top 10% pore size on the large diameter side is D (10), D (10 10) It consists of porous alumina of 2 μm or less. Specifically, in this embodiment, D (10) = 1.4 μm. For this reason, when a gas GA having a gauge pressure of about 2 atm is sent to the outside of the tube using the bubble generating tube 110, a microbubble BB containing bubbles of 1 μm or less can be blown into the liquid LQ in the tube. .

  On the other hand, the housing 120 includes an upstream support portion 130 that supports upstream ends 112 (left end portions in FIG. 2) of the plurality of bubble generation tubes 110, and a downstream end portion 113 (right end portions in FIG. 2) of the bubble generation tubes 110. ), And a cylindrical body 170 that surrounds the plurality of bubble generating tubes 110 while maintaining a distance between the upstream support 130 and the downstream support 150. .

  Among these, the upstream support portion 130 includes a substantially disc-shaped upstream holder 131, a first packing 139, and the upstream holder 131 on one side NX1 in the longitudinal direction NX of the bubble generating tube 110 (that is, upstream side). ) To cover the upstream side cover 140.

  Among the upstream side holder 131 made of stainless steel, the liquid distributor 136 has 13 generation tube insertion holes 132 through which the upstream end 112 of the bubble generation tube 110 is inserted with a predetermined arrangement around the axis AX. (See FIG. 3). Each of the generating tube insertion holes 132 is provided with a packing groove 133 that expands in an annular shape, and a first packing 139 (O-ring) made of EPDM is disposed in the packing groove 133. For this reason, by inserting the upstream end 112 of the bubble generating tube 110 through the generating tube insertion hole 132, the upstream end 112 of the bubble generating tube 110 is respectively connected to the upstream holding tool 131 via the first packing 139. The liquid LQ can be fed into each bubble generating tube 110 from one side NX1 (upstream side) of the upstream side holder 131.

  Further, the peripheral portion of the upstream holding tool 131 is cut out in a stepped shape, and the first flange portion 173 on one side NX1 of the tube surrounding member 171 (body portion 170) described later is fitted and locked. It is set as the latching step part 134 to do. Further, as will be described later, the bolt insertion holes 135 through which the shaft portion 147 of the bolt 146 that fastens the upstream cover tool 140, the upstream holding tool 131, and the first flange portion 173 of the tube surrounding member 171 are drilled at six locations. Has been.

  In addition, the liquid distributor 136 is provided with a concave liquid distribution recess 137 over the range where each of the generating tube insertion holes 132 exists, and the liquid LQ that has flowed in from the liquid inlet 143 described later is shown in FIG. As indicated by the black arrows, the bubbles are distributed through the liquid distribution recesses 137 into the respective tubes of the bubble generation tubes 110 (upstream end portions 112).

The upstream cover 140 made of stainless steel has a disc-shaped upstream end cover portion 141 and a liquid inflow portion 143 that protrudes from the center to one side NX1 in the longitudinal direction. The liquid inlet 144 formed by the liquid inlet 143 is connected to a liquid upstream pipe LSU (see also 1 in FIG. 1) of the liquid pipe LS, and serves as a liquid inlet 10I into which the liquid LQ flows. Further, the upstream end cover portion 141 covers the liquid distribution recess 137 and forms a space for distributing the flowing liquid LQ to each bubble generating tube 110 between the upstream portion 131 and the liquid distribution portion 136 of the upstream holder 131.
Further, the bolt insertion hole 142 through which the shaft portion 147 of the bolt 146 is inserted overlaps with the bolt insertion hole 135 of the upstream holder 131 in the peripheral portion of the upstream cover tool 140 so as to be drilled at six locations. .

  On the other hand, the downstream support portion 150 is a downstream side that covers the substantially disc-shaped downstream holding tool 151, the second packing 159, and the downstream holding tool 151 from the other side NX2 in the longitudinal direction NX (that is, the downstream side). And a cover device 160.

  Among the downstream side holders 151 made of stainless steel, in the collecting path portion 156, 13 generation tube insertion holes 152 through which the downstream end portion 113 of the bubble generation tube 110 is inserted have a predetermined arrangement centered on the axis AX. (See FIG. 3). Each generating tube insertion hole 152 is provided with a packing groove 153 having an annular diameter, and a second packing 159 (O-ring) made of EPDM is disposed in the packing groove 153. For this reason, by inserting the downstream end 113 of the bubble generating tube 110 through the generating tube insertion hole 152, the downstream end 113 of the bubble generating tube 110 is respectively connected to the downstream side holder 151 via the second packing 159. Are kept airtight and liquid tight.

  Further, the peripheral portion of the downstream side holder 151 is cut out in a step shape, and a second flange portion 174 on the other side NX2 of the tube surrounding member 171 (body portion 170) described later is fitted and locked. A locking step 154 is provided. Further, as will be described later, bolt insertion holes 155 through which the shaft portion 167 of the bolt 166 that fastens the downstream cover 160, the downstream holder 151, and the second flange portion 174 of the tube surrounding member 171 are drilled at six locations. Has been.

  In addition, the collective path portion 156 is provided with a concave collective path recess 157 over the range where each of the generating tube insertion holes 152 exists, and the bubble-containing liquid that has flowed out from the downstream end portion 113 of each bubble generating tube 110. The BLQ is collected through the collecting path recess 157 as shown by the striped black arrow in FIG. 2 and guided to the liquid outflow portion 163 described below.

The downstream cover 160 made of stainless steel has a disc-shaped downstream end cover part 161 and a liquid outflow part 163 protruding from the center to the other side NX2 in the longitudinal direction. A liquid downstream pipe LSD (see also FIG. 1) of the liquid pipe LS is connected to the liquid outlet 164 formed by the liquid outlet 163, thereby forming a liquid outlet 10D from which the bubble-containing liquid BLQ flows out. Further, the downstream end cover portion 161 covers the collecting path concave portion 157, and the bubble-containing liquid BLQ that has flowed out from the downstream end portion 113 of each bubble generating tube 110 between the collecting path portion 156 of the downstream side holding tool 151. A space that leads to the liquid outflow portion 163 is formed.
Further, in the peripheral portion of the downstream cover 160, bolt insertion holes 162 through which the shaft portions 167 of the bolts 166 are inserted are perforated at six locations so as to overlap the bolt insertion holes 155 of the downstream holder 151. .

  In the present embodiment, the body portion 170 includes a tube surrounding member 171 that surrounds the bubble generating tube 110 and bolts 146 and 166 while maintaining a distance between the upstream support portion 130 and the downstream support portion 150. A cylindrical tube surrounding member 171 made of stainless steel surrounds the periphery of the 13 bubble generating tubes 110, as well as a substantially cylindrical tube surrounding portion 172, as well as from the end of one side NX1 in the longitudinal direction of the tube surrounding portion 172. It has the 1st flange part 173 expanded toward a radial direction outer side, and the 2nd flange part 174 expanded toward a radial direction outer side from the edge part NX2 of the longitudinal direction other side of the tube surrounding part 172.

  Further, a gas inflow portion 176 that forms a gas inflow port 177 (10J) is provided in a form projecting outward in the central portion in the longitudinal direction NX of the cylindrical tube surrounding portion 172 (FIG. 1 also). reference).

The first flange portion 173 of the tube surrounding member 171 is fitted into the locking step portion 134 of the upstream holding tool 131, and the bolt insertion hole 142 of the upstream cover tool 140 and the bolt insertion hole 135 of the upstream holding tool 131 are connected. By screwing the male screw part 148 of the inserted bolt 146 into the female screw hole 173H provided in the first flange part 173, the upstream cover tool 140, the upstream holding tool 131, and the tube surrounding member 171 (first flange part 173). ) Are fastened to each other.
Further, the second flange portion 174 of the tube surrounding member 171 is fitted into the locking step portion 154 of the downstream holding tool 151, and the bolt insertion hole 162 of the downstream cover tool 160 and the bolt insertion hole 155 of the downstream holding tool 151 are Is inserted into a female screw hole 174H provided in the second flange portion 174, whereby the downstream cover device 160, the downstream holding device 151, and the tube surrounding member 171 (second flange portion). 174) are fastened together.
Further, the tube surrounding member 171 regulates the interval M between the upstream support portion 130 (upstream holding tool 131) and the downstream support portion 150 (downstream holding tool 151) to a predetermined size. .

In the generator 10, the 13 bubble generating tubes 110 are arranged as shown in FIG. FIG. 3 shows only the end faces of the 13 bubble generating tubes 110 and the tube surrounding member 171 (tube surrounding portion 172) in the CC cross section of the generator 10 in FIG. The thirteen bubble generating tubes 110 are arranged in a rotationally symmetric manner every 60 degrees around the axis AX, and the centers of the respective bubble generating tubes 110 are arranged at the apexes of virtual equilateral triangles that are congruent with each other. Has been.
When the plurality of bubble generating tubes 110 are arranged in such a form, the plurality of bubble generating tubes 110 can be arranged without any deviation around the central bubble generating tube 110. It can be set as the generator 10 supported reliably by the upstream support part 130 (upstream side holder 131) and the downstream side support part 150 (downstream side holder 151).

  Further, in this generator 10, a plurality of (13 in the first embodiment) bubble generating tubes 110 are used as the bubble generating elements 10K, and the liquid LQ is distributed to each bubble generating tube 110. The microbubble BB can be generated in the bubble generating tube 110. That is, the area of the bubble generating tube 110 (porous body) in contact with the liquid LQ can be increased, and more microbubbles BB can be blown into the liquid LQ. In addition, since the length of each bubble generation tube 110 can be shortened as compared with the case where one long bubble generation tube is used, the strength of each bubble generation tube 110 is high and the bubble-containing liquid BLQ is reliable. It becomes the generator 10.

  Moreover, in the generator 10 of the present embodiment, the liquid LQ does not come into contact with the outside air when the micro bubbles BB of the gas GA are blown into the liquid LQ, so that the liquid LQ is made into the bubble-containing liquid BLQ in a clean state. Can do.

In the present embodiment, in the generating device 10, the liquid distribution part 136 of the upstream holding tool 131, the collecting path part 156 of the downstream holding tool 151, the tube surrounding part 172 of the tube surrounding member 171, and the bubble generating pipe 110 The space surrounded by is the gas chamber GR. The gas chamber GR communicates with a gas inlet 177 (10J) formed by a gas inflow portion 176 of the tube surrounding member 171.
Further, in the generator 10, the liquid distributor 136 of the upstream holding tool 131 and the upstream end cover part 141 of the upstream cover tool 140, the collecting path part 156 of the downstream holding tool 151, and the downstream of the downstream cover tool 160. A space surrounded by the end cover portion 161 and the bubble generating tube 110 is a liquid chamber LR. The liquid chamber LR is in communication with a liquid inlet 144 (10I) formed by the upstream cover member 140 143 and a liquid outlet 164 (10D) formed by the liquid outlet 163 of the downstream cover member 160.

  Since the manufacturing apparatus 1 includes the upstream valve 21 and the downstream valve 22, the liquid LQ in the liquid upstream pipe LSU upstream of the upstream valve 21 and the downstream of the downstream valve 22 are closed by closing these. Even if the bubble-containing liquid BLQ in the liquid downstream pipe LSD on the side is not discharged, maintenance inside the generator 10, replacement of the bubble generation tube 110 (bubble generation element), and the like can be performed.

  In the present embodiment, the upstream valve 21 and the downstream valve 22 are closed and the discharge valve 23 is opened before the housing 120 (10H) of the generator 10 is disassembled during maintenance of the generator 10 and the like. Thus, the liquid LQ of the generator 10 may be discharged from the discharge pipe LH.

  Moreover, in this manufacturing apparatus 1, since each valve | bulb 21, 22, 31 is an electric valve (automatic valve) and has control part CNT which controls these and pump PU, in starting of a manufacturing apparatus 1, a stop, an operation | movement, etc. The controller CNT can drive the pump PU and open / close the valves 21 in an appropriate order.

Next, control of the pump PU and the valves 21, 22, 31 by the control unit CNT in the manufacturing apparatus 1 of the present embodiment will be described with reference to FIGS. It is assumed that the discharge valve 23 is closed.
In the production of the bubble-containing liquid BLQ by the production apparatus 1, when the power is turned on and the control of the control unit CNT is started, as shown in FIG. 4, first, activation of the pump PU, opening and closing of each valve 21, etc. Processing step S1 is performed, the manufacturing apparatus 1 is started, and the bubble-containing liquid BLQ is manufactured (the manufacturing apparatus 1 is operated).

Thereafter, in step S2, the presence or absence of a stop instruction from the operator to the control unit CNT is confirmed. Here, if Yes, that is, if a stop instruction is input, step S3 described below is skipped, and stop processing step S4 is performed. On the other hand, if No, that is, if a stop instruction has not been input, the process proceeds to step S3.
In step S3, it is detected whether or not there is an abnormal signal from sensors installed at various locations (not shown) or drive circuits (not shown) of the pump PU. Here, if No, that is, if an abnormal signal is not input, the process returns to step S2. On the other hand, if Yes, that is, if an abnormal signal is input, stop processing step S4 is performed.

  In the stop processing step S4, the operation of the manufacturing apparatus 1 is stopped and the manufacture of the bubble-containing liquid BLQ is ended. In addition, while the operation of the manufacturing apparatus 1 is stopped, the maintenance of the generator 10 can be performed as described above.

  Among these steps, the activation processing step S1 confirms the presence or absence of an activation instruction from the operator to the control unit CNT in step S11 as shown in FIG. That is, it waits until an activation signal is input. When the activation signal is input, first, in step S12, the gas valve 31 is opened. Next, in step S13, the downstream valve 22 is opened, then the upstream valve 21 is opened (step S14), and the pump PU is started (step S15). The reason why the gas valve 31 is opened first is to increase the atmospheric pressure of the gas chamber GR and prevent the liquid LQ in the liquid chamber LR (in the tube) from leaking through the bubble generating tube 110.

  As a result, the gas GA flows into the gas chamber GR, that is, into the tube surrounding portion 172 through the gas pipe GS and the gas inlet 177 (10J), and a predetermined gauge pressure is applied to the bubble generating tube (bubble generating element) 110. It takes. Further, the liquid LQ pumped from the pump flows into the liquid chamber LR, that is, into the bubble generation tube 110 through the liquid upstream pipe LSU and the liquid inlet 144 (10I). Thereby, in the bubble generation tube 110, the microbubbles BB are blown into the liquid LQ to produce the bubble-containing liquid BLQ, which is stored in the tank TK2 through the liquid outlet 164 (10D) and the liquid downstream pipe LSD.

  Further, as shown in FIG. 6, the stop processing step S4, which is performed by inputting a stop signal (step S2) or an abnormal signal (step S3), first closes the gas valve 31 in step S41, and then continues to pump. The PU is stopped (step S42). Thereafter, the upstream valve 21 is closed (step S43), and further the downstream valve 22 is closed (step S44). Thereby, supply to the generator 10 of the liquid LQ and gas GA is stopped, and manufacture of the bubble containing liquid BLQ is also stopped. Further, the gas chamber GR of the generator 10 is closed by the gas valve 31, and the liquid chamber LR is closed by the upstream valve 21 and the downstream valve 22.

The reason for this will be described below.
If the pump PU is stopped during the operation of the manufacturing apparatus 1 of the present embodiment, the liquid pressure of the liquid LQ is reduced to almost zero downstream of the pump PU. On the other hand, when the gas valve 31 is not closed, the atmospheric pressure in the gas chamber GR is the atmospheric pressure adjusted by the regulator RG. On the other hand, even when the gas valve 31 is closed, after the gas valve 31 is closed, the atmospheric pressure is reduced only by the amount of the gas GA that decreases as a microbubble BB or the like, so the atmospheric pressure (residual pressure) of the gas chamber GR is Kept high. For this reason, in the generator 10, the differential pressure (= atmospheric pressure−hydraulic pressure), which is the difference between the atmospheric pressure of the gas GA in the gas chamber GR and the hydraulic pressure of the liquid LQ in the liquid chamber LR, increases, and a large amount of gas Since GA is blown into the liquid LQ in the liquid chamber LR, large bubbles expand not only in the liquid chamber LR but also in the liquid upper flow path LSU and the liquid lower flow path LSD. For this reason, when restarting the manufacturing apparatus 1, troubles such as the need to remove the bubbles have occurred.

In contrast, in the manufacturing apparatus 1, the control unit CNT not only stops the pump PU but also closes the upstream valve 21 and the downstream valve 22. For this reason, by stopping the manufacturing apparatus 1, even if gas is blown into the liquid LQ in the liquid chamber LR, large bubbles pass through the upstream valve 21 and the downstream valve 22, and the liquid upstream flow path LSU and liquid downstream. The road LSD is prevented from expanding.
In addition, by closing the gas valve 31, the atmospheric pressure in the gas chamber LR can be reduced as much as the gas GA is consumed as bubbles as compared with the case where the gas valve 31 is left open.

  In addition, even after the upstream valve 21 and the downstream valve 22 are closed, the gas GA tends to generate bubbles in the liquid LQ in the liquid chamber LR due to the residual pressure in the gas chamber GR. In the liquid chamber LR closed by the downstream valve 22, the liquid pressure of the liquid LQ rises when bubbles are blown, so that the blowing of bubbles is suppressed to the magnitude of the differential pressure that balances the atmospheric pressure and the liquid pressure. A large amount of gas GA is not blown into the liquid LQ.

  Moreover, in this manufacturing apparatus 1, since each valve 21,22,31 is an automatic valve and is provided with control part CNT which controls pump PU and each valve 21,22,31, starting and a stop of the manufacturing apparatus 1 are carried out. In operation, the controller CNT can perform operations such as driving and stopping the pump PU and opening and closing of the valves 21 and the like in an appropriate order and timing. In addition, the above-described usage method can be easily realized by using the control unit CNT.

As described above, in this embodiment, steps S42 to S44 are performed in the order shown in FIG.
However, the upstream valve 21 and the downstream valve 22 may be closed before and after, or the simultaneous downstream or downstream valve 22 may be closed first.

Further, when closing the upstream valve 21 and the downstream valve 22, due to the inertia of the flowing liquid LQ, water hammer occurs on the upstream side of these valves 21 and 22, and the hydraulic pressure decreases on the downstream side. In order to alleviate these, avoid closing the valves 21 and 22 abruptly, and slow the closing speed of the valves 21 and 22. Specifically, an electric butterfly valve is used as the upstream valve 21 and the downstream valve 22, the valve closing speed is controlled, and the transition from fully open to fully closed may be made in about 1 to 3 seconds.
Furthermore, when stopping the pump PU, in order to mitigate the occurrence of water hammer on the upstream side of the pump PU and the pressure wave of the hydraulic pressure drop on the downstream side, avoid sudden stop, stop by inverter control It is good to perform control which reduces a speed and to make transition from the drive of pump PU to a stop in 1 to 5 seconds.

The upstream valve 21 is preferably provided at a position near the liquid inlet 144 (10I) in the liquid upstream pipe LSU. That is, it is good to arrange | position to the liquid inflow port 144 (10I) side among the path | routes of the liquid upstream piping LSU between pump PU and the liquid inflow port 144 (10I). In a position close to the generator 10, the flow of the liquid LQ can be opened and closed, the amount of the liquid LQ existing between the upstream valve 21 and the downstream valve 22 can be reduced, and in the case of maintenance of the generator 10, etc. The amount of liquid LQ to be discarded can be reduced.
Similarly, the downstream valve 22 may be provided at a position near the liquid outlet 164 (10D) in the liquid downstream pipe LSD. That is, it is preferable to arrange the liquid downstream pipe LSD between the tank TK2 and the liquid outlet 164 (10D) on the liquid outlet 164 (10D) side. In a position close to the generator 10, the flow of the liquid LQ can be opened and closed, the amount of the liquid LQ existing between the upstream valve 21 and the downstream valve 22 can be reduced, and in the case of maintenance of the generator 10, etc. The amount of liquid LQ to be discarded can be reduced.

In the present embodiment, as described above, when the manufacturing apparatus 1 is stopped, the gas valve 31 is closed before the pump PU is stopped (step S42) (step S41: see FIG. 6).
When the gas valve 31 is closed early and the supply of the gas GA is stopped, the pressure (residual pressure) of the gas GA in the gas chamber GR after the production apparatus 1 is stopped is lowered, and the liquid LQ in the liquid chamber LR is stopped during the stop. The amount of bubbles blown can be suppressed.

Moreover, the manufacturing apparatus 1 of the present embodiment uses a pipe-shaped bubble generating tube 110 made of a porous material as the bubble generating element, and the liquid LQ is circulated in the bubble generating tube 110.
As described above, in the manufacturing apparatus 1 of the present embodiment including the generating device 10 using the bubble generating tube 110, the area of the bubble generating tube 110 in contact with the liquid LQ is large, and more micro bubbles BB can be blown into the liquid LQ. it can.

In the above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can be appropriately modified and applied without departing from the gist thereof. .
For example, in the manufacturing apparatus 1 of the embodiment, the form in which the cylindrical bubble generating tube 110 made of a porous body is used as the bubble generating element 10K and the liquid LQ is allowed to flow inside the generator 10 is illustrated.
However, as a generating device, a plate-like, hemispherical, or spherical shell-like porous body may be used for the bubble generating element, and the gas chamber and the liquid chamber may be configured by the housing and the bubble generating element. . It is also possible to use a generator that uses a bubble generating tube and supplies gas inside and inside the bubble generating tube.

  In the manufacturing apparatus 1 of the embodiment, the bubble-containing liquid BLQ is manufactured from the liquid LQ in the tank TK1 and stored in the tank TK2. However, the tank TK2 may be eliminated, the produced bubble-containing liquid BLQ may be returned to the tank TK1, and the microbubbles BB may be blown into the liquid LQ repeatedly.

DESCRIPTION OF SYMBOLS 1 Microbubble containing liquid manufacturing apparatus 10 Microbubble generator 10I Liquid inlet 10D Liquid outlet 10J Gas inlet 10H Housing 10HG (of microbubble generator) Gas chamber component 10HL (Of housing) Liquid chamber component 10K Bubble generating element GR Gas chamber LR Liquid chamber PU Pump LS Liquid pipe LSU Liquid upstream pipe (upper liquid flow path)
LSD liquid downstream piping (liquid flow path)
LH discharge pipe 21 Upstream valve (Upstream automatic valve)
22 Downstream valve (downstream automatic valve)
LQ Liquid BLQ Bubble-containing liquid GA Gas BB Microbubble GS Gas pipe (gas supply path)
31 Gas valve (Automatic gas valve)
CNT control unit NX Longitudinal direction NX1 (longitudinal direction) one side NX2 (longitudinal direction) other side 110 Bubble generating pipe (bubble generating element)
120 Housing 130 Upstream support 150 Downstream support 170 Body 131 (Upstream support) Upstream holder 139 (Upstream support) First packing 140 (Upstream support) Upstream Side cover 143 Liquid inflow portion 144 Liquid inflow port 151 (outside of downstream support portion) Downstream holding device 159 (out of downstream side support portion) Second packing 160 (out of downstream side support portion) Downstream side cover device 163 Liquid outflow portion 164 Liquid outflow port 171 Tube surrounding member (body)
172 Pipe surrounding portion 176 (of the tube surrounding member) 176 Gas inflow portion 177 Gas inlet S42 Step of stopping pump S41 Step of closing gas valve S43 Step of closing upstream valve S44 Step of closing downstream valve

Claims (7)

A housing having a gas inlet, a liquid inlet, and a liquid outlet; and
It has a bubble generating element that is held in the housing and is made of a porous body,
The housing and the bubble generating element are:
A gas chamber surrounded by a part of the housing and the bubble generating element and communicating with the gas inlet;
Surrounded by the other part of the housing and the bubble generating element, the liquid inlet and the liquid chamber communicating with the liquid outlet are configured,
Contains liquid from the liquid inlet to the liquid chamber, supplies gas from the gas inlet to the gas chamber, generates microbubbles of the gas in the liquid from the bubble generating element, and contains bubbles A microbubble generator for causing liquid to flow out of the liquid outlet,
A gas supply path connected to the gas inlet and supplying the gas to the gas inlet;
A liquid upper flow path connected to the liquid inlet and for flowing the liquid to the liquid inlet;
A pump for pumping the liquid to the liquid inlet through the liquid flow path;
A sub-flow channel that is connected to the liquid outlet and allows the bubble-containing liquid to flow from the liquid outlet;
The gas supply path has a gas valve that opens and closes the flow of the gas to the gas inlet,
The liquid flow path has an upstream valve that opens and closes the flow of the liquid to the liquid inlet,
The submerged flow path is a device for producing a bubble-containing liquid having a downstream valve that opens and closes the flow of the bubble-containing liquid from the liquid outlet. An apparatus for producing a bubble-containing liquid according to claim 1,
The gas valve is a gas automatic valve composed of an automatic valve,
The upstream valve is an upstream automatic valve composed of an automatic valve,
The downstream valve is a downstream automatic valve composed of an automatic valve,
An apparatus for producing a bubble-containing liquid, comprising: a controller that controls driving of the pump and driving of the gas automatic valve, the upstream automatic valve, and the downstream automatic valve. An apparatus for producing a bubble-containing liquid according to claim 2,
The controller is
In stopping the production apparatus for the bubble-containing liquid,
In addition to stopping the pump,
Close the gas automatic valve,
An apparatus for producing a bubble-containing liquid for closing the upstream automatic valve and the downstream automatic valve. An apparatus for producing a bubble-containing liquid according to claim 3,
The controller is
In stopping the production apparatus for the bubble-containing liquid,
An apparatus for producing a bubble-containing liquid that closes the gas automatic valve before the pump is stopped. An apparatus for producing a bubble-containing liquid according to any one of claims 1 to 4,
The bubble generating element is:
It is a pipe-shaped bubble generator tube made of a porous material,
An apparatus for producing a bubble-containing liquid for circulating the liquid in the bubble generation tube. A housing having a gas inlet, a liquid inlet, and a liquid outlet; and
It has a bubble generating element that is held in the housing and is made of a porous body,
The housing and the bubble generating element are:
A gas chamber surrounded by a part of the housing and the bubble generating element and communicating with the gas inlet;
Surrounded by the other part of the housing and the bubble generating element, the liquid inlet and the liquid chamber communicating with the liquid outlet are configured,
Contains liquid from the liquid inlet to the liquid chamber, supplies gas from the gas inlet to the gas chamber, generates microbubbles of the gas in the liquid from the bubble generating element, and contains bubbles A microbubble generator for causing liquid to flow out of the liquid outlet,
A gas supply path connected to the gas inlet and supplying the gas to the gas inlet;
A liquid upper flow path connected to the liquid inlet and for flowing the liquid to the liquid inlet;
A pump for pumping the liquid to the liquid inlet through the liquid flow path;
A sub-flow channel that is connected to the liquid outlet and allows the bubble-containing liquid to flow from the liquid outlet;
The gas supply path has a gas valve that opens and closes the flow of the gas to the gas inlet,
The liquid flow path has an upstream valve that opens and closes the flow of the liquid to the liquid inlet,
The sub-flow channel is a method of using a bubble-containing liquid production apparatus having a downstream valve that opens and closes the flow of the bubble-containing liquid from the liquid outlet.
In stopping the production apparatus for the bubble-containing liquid,
Stopping the pump being driven;
Closing the gas valve;
Closing the upstream valve;
Closing the downstream valve; and a method of using an apparatus for producing a bubble-containing liquid. It is a usage method of the manufacturing apparatus of the bubble containing liquid of Claim 6, Comprising:
The gas valve is a gas automatic valve composed of an automatic valve,
The upstream valve is an upstream automatic valve composed of an automatic valve,
The downstream valve is a downstream automatic valve composed of an automatic valve,
The apparatus for producing the bubble-containing liquid is:
A method for using an apparatus for producing a bubble-containing liquid, comprising: a controller that controls driving of the pump, the automatic gas valve, the upstream automatic valve, and the downstream automatic valve.

Images