582results about "Dissolving" patented technology

To provide a gas ejection nozzle which maintains high gas dissolution capacity by using a cavitation screw member and is also superior in self-priming capacity, and to provide a gas dissolution device and a gas dissolution method using the gas ejection nozzle.SOLUTION: A gas ejection nozzle 1 comprises: a nozzle body 2 in which a single liquid channel 11 having a liquid inlet 3 at one end and a liquid outlet 4 at the other end is formed, and in which a throttle part 9 is formed in the middle of the liquid channel 11 so as to have a smaller diameter than the liquid inlet 3; a cavitation screw member 10 disposed within the throttle part 9; and a gas dissolution diameter expansion part 13 which is connected to a downstream side of the throttle part 9 so as to form a part of the liquid channel 11, and which continuously or gradually expands an axial cross section toward the liquid outlet 4. A gas introduction hole 6 of the nozzle body 2 communicates with the throttle part 9 or the gas dissolution diameter expansion part 13 at a downstream side beyond all cavitation screw members 10 positioned within the throttle part 9, and is formed so as to connect an external part of the nozzle body 2 and the liquid path 11.SELECTED DRAWING: Figure 1

The invention relates to the technical field of agricultural fertilization, in particular to a drip irrigation device for tea planting, which comprises a water and fertilizer tank mounted on a support, a liquid inlet at the top of the water and fertilizer tank is externally connected with a water and fertilizer pump, a liquid outlet at the bottom of the water and fertilizer tank is communicated with a connector, and a liquid outlet port of the connector is hermetically communicated with a branch pipe. The end part of the branch pipe is communicated with a fertilization pipe, and an open-close type water dropper is mounted in the fertilization pipe; the fertilizer applicator further comprises a blow-down valve arranged at an outlet of the tail branch pipe, a plug is slidably mounted in the blow-down valve, a first spring is arranged between the blow-down valve and the plug, and a sealing mechanism is arranged on the fertilizer applying pipe. The blow-down valve is arranged at the outlet of the tail-section branch pipe, and the air bag and the closing plate are integrated on the fertilization pipe, so that when the water pressure exceeds a preset threshold value of the plug, the blow-down valve is automatically opened, deposited impurities in the pipe are intensively discharged, regular self-cleaning without manual intervention is realized, and the blocking risk is effectively reduced.

The present invention discloses a chemical agent dispensing device for groundwater remediation, comprising: an outer cylinder for drilling, a medicine storage device for storing chemicals is arranged inside the outer cylinder, a medicine injection cylinder for mixing the chemicals with water is slidably inserted into the outer cylinder, a drainage device for introducing part of the groundwater into the medicine injection cylinder is arranged inside the outer cylinder, and a medicine discharging device for discharging the chemicals in the medicine injection cylinder into the groundwater is arranged on the medicine injection cylinder; in the present invention, the rotating blades in the medicine discharging device automatically adjust the rotation speed of the screw rod according to the groundwater flow rate, so as to realize the automatic adjustment of the discharging speed of the chemicals in the medicine injection cylinder into the groundwater. When the groundwater flow rate is fast, the discharging speed of the chemicals is increased; when the flow rate is slow, the discharging speed of the chemicals is decreased, so that the chemical agent dosage precisely matches the actual situation of the groundwater, significantly improving the utilization efficiency of the chemical agent and the remediation effect. Moreover, its structure is mainly composed of a screw rod, rotating blades, etc., and it works relying on the groundwater flow and mechanical transmission, reducing the probability of failure and the maintenance cost.

The invention discloses a method for efficiently dissolving all components of a plant biomass raw material. According to the method, a eutecticevaporate solvent system is adopted to carry out mild soaking treatment on a plant biomass raw material, and a homogeneous plant biomass all-component solution is finally formed by combining the dissolution synergistic coupling effect of a metal salt solution. All-component one-pot efficient dissolution of cellulose, hemicellulose and lignin in the plant biomass raw materials can be achieved, the dissolution efficiency reaches up to 100%, the dissolution process is mild, energy consumption is low, and the method has industrial application prospects; the prepared plant biomass all-component solution can be used as a material construction platform for preparing a series of plant biomass gel, films, fiber materials and the like with excellent performance, and can be used in the fields of sewage treatment, bio-based packaging, spinning, energy collection, 3D printing and the like.

The invention discloses a nuclear power plant boron preparation dosing device, and relates to the technical field of nuclear power plant safe operation, the nuclear power plant boron preparation dosing device comprises a boron bin and a material conveying cylinder obliquely arranged on one side of the boron bin; the boron bin is provided with a retention cavity with an opening in the top, the conveying barrel is provided with a feeding port communicated with the retention cavity, a discharging port higher than the feeding port and a conveying channel connected with the feeding port and the discharging port, and a feeding assembly capable of conveying boric acid to a high position from a low position and conveying the boric acid out of the discharging port is arranged in the conveying channel. Through cooperation of the obliquely arranged conveying barrel and the built-in auger feeding rod, boric acid is conveyed from a low position to a high position to supply white crystalline powdery boric acid to the boric acid solution preparation box, a traditional manual feeding mode is replaced, diffusion of boric acid dust is remarkably reduced, the working environment is improved, and the health of operators is guaranteed. And the filtering assembly is arranged, so that the caked or clustered large-particle boric acid is intercepted, the subsequent stirring strength is reduced, and the dissolving time is shortened.

The invention discloses a novel environment-friendly watering device for dust fall in constructional engineering construction, and relates to the technical field of constructional engineering.The novel environment-friendly watering device for dust fall in constructional engineering construction comprises a water tank, universal wheels are fixedly connected to the bottom of the water tank, a water inlet is formed in the top of the water tank, and a water pump is fixedly connected to the side wall of the water tank; the bottom of the water pump is fixedly connected with one end of a water suction pipe; according to the novel environment-friendly watering device for dust fall in building engineering construction, by starting a motor, a rotating rod rotates, so that a rotating column is driven to rotate and do circular motion, chemicals enter the rotating column from a chemical liquid opening, meanwhile, the rotating column rotates to drive a spraying column to rotate in the same direction, and the chemical liquid is sprayed out and evenly sprayed into a water tank; the problem that more water needs to be sprayed for dust falling due to the fact that liquid medicine is concentrated at one position of the water tank and dissolution of water and the liquid medicine is slow is solved. And the water-saving effect is achieved.

The invention provides a powder dissolving kettle with a disperser and application of the powder dissolving kettle. The powder dissolving kettle comprises a dissolving kettle body, a powder inlet pipe connected with the dissolving kettle body and a powder flow guide shell arranged in the dissolving kettle body. The powder guide shell is a cone with an opening in the bottom surface; and the powder inlet pipe is arranged above the powder flow guide shell. Powder is conveyed into the dissolving kettle body, the powder is fully mixed with saturated steam in the dissolving kettle body under the action of the saturated steam jet piece at the top, and meanwhile, the powder guide shell guides the powder through the conical peripheral surface, so that the powder moves downwards along the conical peripheral surface, on one hand, the mixing uniformity is improved, and the mixing efficiency is improved. Secondly, the dissolving efficiency of the powder is improved; and thirdly, the solubility of the powder is improved. In addition, the dissolving process does not involve the addition of a liquid solvent, so that the post-treatment process is simplified, the energy consumption of the post-treatment process is reduced, and the problem of large discharge amount of waste liquid in the post-treatment process is solved.

According to the present invention, ozone can be dissolved in water with high efficiency and the sustainability of the ozone concentration in the obtained ozone-containing water can be greatly improved. [Solution] With respect to the generated ozone-containing water, the first in-liquid ozone concentration A is the concentration of ozone contained therein which is determined by an ultraviolet absorption method, the second in-liquid ozone concentration B is the concentration of ozone contained therein which is determined by a diethyl-p-phenylenediamine method, the in-liquid ozone concentration difference C = A – B is the value obtained by subtracting the second in-liquid ozone concentration B from the first in-liquid ozone concentration A, and the in-liquid ozone concentration difference ratio C / A is the ratio of the in-liquid ozone concentration difference C to the first in-liquid ozone concentration A. The starting material water is passed through a gas ejection nozzle so that the value of C / A is 20% or more.

The present invention relates to the field of chemical engineering and oil and gas extraction technology, and in particular to an online instant mixing and fracturing fluid device for polymer dry powder and a mixing method. The device comprises: a skid seat, on which a transport component, a storage component, a mixing component and a power component are provided; a storage tank, fixedly connected to the skid seat, the storage tank is equipped with a transmission component, a rotating frame is provided in the storage tank, the transmission component is used to drive the spiral lifting of the rotating frame, and the rotating frame is provided with inclined sharp parts symmetrically distributed in the center; a vibration component is provided in the storage tank. The present invention rotates the rotating frame and moves upward along the threaded rod, so that the dry powder on the upper layer of the inclined sharp part of the rotating frame moves upward, and pores are formed between the dry powders, so as to reduce the occurrence of the phenomenon that the lower layer of the dry powder is compacted due to excessive temporary storage, thereby reducing the probability that the dry powder cannot be discharged from the storage tank due to compaction, resulting in insufficient dry powder content in the fracturing fluid, thereby ensuring the quality of the fracturing fluid.

The invention discloses a production device and process for cyclic purification and refinement of melamine, the production device comprises a dissolving tank, a press filter, an air cooling tower, a centrifugal machine, a drying machine, a separator, a mother liquor tank and a slag tank, the mother liquor output end of the centrifugal machine is connected with the input end of the mother liquor tank through a pipeline; the filter residue output end of the press filter is connected with the input end of the residue pool through a pipeline, the output end of the mother liquor pool is connected with the input end of the dissolving pool through a pipeline, the press filter is connected with a cooking system, and the cooking system is used for cooking a processing cavity in the press filter. According to the invention, the mother liquor circulating passage is arranged, the mother liquor generated by the centrifugal machine enters the mother liquor tank and is circulated into the dissolving tank through a pipeline, the cooking liquor recycling passage is arranged, the used press filter is cooked by using the cooking system, and the residue liquid formed by cooking is input into the residue tank and is input into the mother liquor tank, so that the cyclic purification of melamine is realized; the utilization rate and purification rate of raw materials are improved.

Embodiments of the present disclosure provide a detergent dispenser device and methods of systems related thereto. Dispensers of the present disclosure comprise a container with side walls, a base, and a lid. The dispensers and methods of use described herein are operable to store and contain a cleaning agent, allow fluid to be applied to the agent to create a cleaning solution, and further facilitate drying and fluid management.

A medicament preparation system includes a water purification module and a medicament proportioning module that is interoperable with a replaceable fluid circuit. The fluid circuit includes a purified water inlet, a product medicament outlet, and a plurality of pumping tube segments. At least a first concentrate container is connected by at least a portion of the fluid circuit to the product medicament output and a first concentration measurement sensor station is positioned in a flow path. A controller is programmed to calculate iteratively a concentration of a first concentrate from the first concentrate container and the purified water from a signal generated by the first concentration measurement sensor station and to regulate one or both of a first pumping actuator engaged with the first pumping tube segment and a second pumping actuator engaged with the second pumping tube segment, responsively to the concentration of the first concentrate and water.

The utility model provides automatic dissolving treatment equipment for a sample and an automatic treatment system for the sample. The automatic dissolution processing equipment for the sample comprises a sample workbench; the processing module is arranged on the sample workbench and is used for dissolving the sample; the ground rail module is arranged on the sample workbench; and the robot is arranged on the ground rail module, and the robot can move along the ground rail module. The ground rail module is arranged on the sample workbench, the robot is arranged on the ground rail module, and the robot can move along the ground rail module, so that the whole process of sample dissolving treatment is automatic and unmanned, the working efficiency is improved, and the labor cost is reduced; through the arrangement of the ground rail module, the possibility of interference and collision between the manipulator and the processing module is reduced, then the degree of freedom of the arrangement position of the processing module is widened, and the material conveying efficiency can be further improved.

The invention belongs to the field of medical devices, and provides a dissolving device which comprises at least one cup body assembly. The second supporting plate is located below the cup body assembly; the second transmission pieces are arranged in one-to-one correspondence with the cup body assemblies and penetrate through the second supporting plate; and the third transmission part is positioned below the second supporting plate. According to the dissolving device disclosed by the invention, multiple sets of multi-stage transmission structures are arranged, so that the cup body not only can rotate, but also can revolve around a shaft positioned outside the cup body, a better dissolving effect is achieved, and foams generated by modes such as oscillation are avoided; in addition, in order to enable the dissolving device to be matched with an automatic liquid injection device, each cup body in the cup body assembly can be controlled to rotate to a preset position according to requirements.

The medicine preparation device comprises a container, a medicine containing piece and a cover plate, an opening is formed in the top of the container, and an injection opening for an injector to be inserted in is formed in the side wall of the container; the medicine loading piece is movably arranged at the opening, is provided with a sinking groove formed in the container and is used for placing freeze-dried powder; the cover plate is movably connected to the container and used for opening or closing the opening; when the medicine loading piece moves, the groove wall of the sinking groove can open or close the injection opening. According to the technical scheme, the medicine containing part is movably installed at the opening of the container, the injection opening of the container is opened and communicated with the interior of the container, the injector can inject a solvent to dissolve freeze-dried powder in the medicine containing part, the medicine containing part continues to move to close the injection opening, and liquid medicine which is not completely dissolved is prevented from flowing back to the injector. According to the device, the injection port can be closed during configuration, and the injection port is opened after dissolution is completed, so that liquid medicine is effectively prevented from flowing back to the injector, and the medicine effect of the injector can be guaranteed.

The utility model discloses a medicine infiltrating device, relates to water treatment technical field, including device main part, device main part has the cylinder structure of both ends open, the bottom of device main part is fixedly connected with the mounting plate, the lower side of mounting plate is equipped with the discharge port, the upper side of discharge port is fixedly connected with the cone bucket, the cone bucket is equipped with the discharge port. The inner wall of the conical hopper is provided with a periodic concave-convex structure, the periodic concave-convex structure is used for dispersing water flow to form a uniform water film, the lower side of the discharging port is fixedly connected with a discharging pipe, and a water inlet mechanism is installed outside the device body. According to the device, through an innovative tangential water inlet conical hopper structure and a concave-convex structure arranged on the outer side of the conical hopper, it is ensured that water flow can uniformly flow along the inner surface of the whole conical hopper under the condition of low flow of inlet water, medicine can be uniformly infiltrated, local accumulation is avoided, the medicine utilization rate and mixing uniformity are improved, and water is saved.

The invention discloses a polyamide salt dissolving and concentrating system, a polyamide salt dissolving and concentrating method and application. The polyamide salt dissolving and concentrating system comprises a dissolving kettle and an evaporator; the polyamide salt slurry outlet of the dissolving kettle is connected with the polyamide salt slurry inlet of the evaporator through a pipeline; and the dissolving kettle is a powder dissolving kettle with a Venturi tube ejector. According to the invention, the powder dissolving kettle with the Venturi tube ejector is adopted, so that the water quantity required for dissolving polyamide salt can be effectively reduced, and the material consumption is reduced; in addition, steam discharged by the evaporator is returned to the powder dissolving kettle with the Venturi tube ejector for reuse, waste heat recovery can be achieved, heat is saved, and waste water discharge is greatly reduced.

A gas turbulation apparatus is provided for delivering various effects by the turbulation of a substance using a turbulation gas flow. The turbulation apparatus has a vacuum chamber having a vacuum opening and a gas inlet through which a turbulation gas may be drawn from an outside of the vacuum chamber into an inside of the vacuum chamber. The application of a vacuum at the vacuum opening is operable to draw turbulation gas into the inside of the vacuum chamber and through a substance provided therein to thereby turbulate the substance.

The present invention relates to a bottle, and in particular to a CO 2 that can be carbonated and stored in the bottle. 2 The present invention relates to a reusable and refillable bottle for CO2-containing beverages. A bottle with better usage characteristics is to be achieved. The problem is solved by a bottle that is attached or flanged to the base of a liquid container (1) and that contains CO2. 2 The problem is solved by providing an openable liquid container (1) having an adapter (6) containing a tank (11).

The utility model relates to a deslagging device which comprises a base, a dissolving tank, a moving assembly and a slag salvaging and discharging mechanism, and one side of the base is connected with the dissolving tank in a sliding mode; when chitosan needs to be prepared, a dissolving solution can be put into the dissolving tank, the residue fishing cage is soaked in the dissolving tank, then a flaky chitosan raw material is put into the dissolving tank, the flaky chitosan raw material is dissolved, the lifting part can be operated after dissolving is completed, the lifting part drives the residue fishing cage to be separated from the dissolving tank, then the shaking assembly is operated, and the flaky chitosan raw material is separated from the dissolving tank. The shaking assembly drives the residue salvaging cage to shake up and down, a residual chitosan solution in the residue salvaging cage flows back into the dissolving tank, then the dissolving tank is driven to move through the moving assembly, the pouring assembly is operated, and the pouring assembly pours out the residues in the residue salvaging cage, so that the residual residues of the raw materials can be better discharged, the labor intensity is reduced, and the production efficiency is improved. Time and labor are saved, waste of the chitosan solution is avoided, and the production cost is reduced.

This ammonia-detoxifying system is provided with a first dilution treatment device comprising: a first tank that retains an absorption liquid capable of absorbing ammonia; a gas introduction unit that introduces, into the first tank, an ammonia-containing gas to be detoxified; a bubble generation unit that generates bubbles in the absorption liquid by using the gas to be detoxified introduced by the gas introduction unit to generate, in the absorption liquid, a rising flow generated due to rise of the bubbles; a bubble micronization unit that is provided above the bubble generation unit and micronizes the bubbles; and a first gas discharge line that discharges a gas from a gas phase in the first tank to the outside of the first tank.

The utility model belongs to the technical field of adipic acid production equipment, and particularly relates to an adipic acid crystal circulating dissolving system which comprises an adipic acid dissolving heat exchanger, a centrifugal machine, an adipic acid filter cake receiving tank, an adipic acid crystal dissolving tank, an adipic acid dissolving circulating pump and a condensate recovery tank, the adipic acid dissolving heat exchanger is provided with a shell pass pipeline and a tube pass pipeline; the inlet end of a shell pass pipeline of the adipic acid dissolving heat exchanger is connected with a low-pressure steam pipeline; the outlet end of a shell pass pipeline of the adipic acid dissolving heat exchanger is connected with a condensate pipeline, and the outlet end of the condensate pipeline is communicated with a condensate recovery tank; the output end of the centrifugal machine is communicated with the input end of the top of the adipic acid filter cake receiving tank through a pipeline. The system disclosed by the utility model is high in stability and excellent in performance, and can solve the common problems of incomplete dissolution, easiness in pipeline blockage, difficulty in density detection and control and the like in the dissolution and conveying process of high-concentration adipic acid slurry in a hot material circulating dissolution manner.

The utility model relates to the technical field of chemotherapeutic drug preparation, and discloses a closed chemotherapeutic drug preparation device, which comprises an installation cylinder, a powder bag and a liquid bottle are arranged in the installation cylinder, the powder bag and the liquid bottle are arranged up and down, a configuration structure is arranged in the installation cylinder, and the configuration structure comprises two partition plates fixed in the installation cylinder. Through the arrangement of the configuration structure, a worker puts a powder bag into the mounting cylinder, slides the powder bag into the corresponding partition plate to be clamped, inserts a first needle head into a connector of the powder bag, slides a second needle head into the partition plate above to be clamped, puts a liquid bottle into the mounting cylinder, penetrates the second needle head into the liquid bottle, and flows liquid into the powder bag through the needle heads and a conveying pipe; preliminarily mixing with the medicinal powder; then a motor is started to drive a cam to rotate and push a movable plate to lift in a reciprocating manner, vibration is applied to the powder bag under the action of a spring, dissolution and mixing of medicine powder and saline water are accelerated, rapid and uniform preparation is achieved, and the chemotherapeutic medicine preparation efficiency and effect are improved.

The present invention achieves a high gas dissolving capacity by a gas ejection nozzle using a cavitation screw member, and makes it possible to greatly improve the sustainability of the concentration of a contained gas in the obtained liquid. [Solution] Liquid is fed to the gas ejection nozzle at a flow rate at which the value of the effective valley point flow rate density α is 1.0 piece･minute / L to 3.5 pieces･minute / L; gas is supplied to a gas introduction hole of the nozzle body; and while the gas from the gas introduction hole is sucked into the liquid, the gas is caught into a turbulent flow generated in a gas dissolution diameter expansion part and dissolved.

The invention discloses a serial instantaneous dissolution conveying system and a control method thereof. The system comprises at least two sets of dissolving and conveying devices, each dissolving and conveying device comprises a top unit, a middle unit and a bottom unit, each top unit comprises a stock bin, each middle unit comprises a feeding machine, each feeding machine is connected with the corresponding stock bin, each bottom unit comprises a dissolving tank, a demineralized water conveying pipe, a compressed air conveying pipe and a solution conveying pipe, and each dissolving tank is connected with the corresponding feeding machine. Desalted water is conveyed into the dissolving tank through the desalted water conveying pipe to dissolve materials, and compressed air is conveyed into the dissolving tank through the compressed air conveying pipe to drive the solution to be output through the solution conveying pipe. Through optimization design and a parallel control strategy, the problems of low dissolving efficiency, discontinuous liquid supply, large pressure fluctuation and the like in a traditional dissolving and conveying system are solved, efficient and stable conveying of the liquid denitration agent is achieved, storage and transportation losses are reduced, the maintenance cost is reduced, and technical support is provided for industrial continuous denitration.

An ultra fine bubble production device includes: a container portion having a containment space formed therein for containing liquid and gas; a pressurizing portion configured to compress the containment space to generate, in the containment space, pressurized gas dissolved liquid including the liquid and the gas dissolved under pressure in the liquid; a holding portion configured to hold a dissolved state under pressure in which the gas is dissolved under pressure in the liquid; and a depressurizing portion configured to open, in the dissolved state under pressure, a communication path through which an inside and an outside of the containment space communicate with each other, to depressurize the pressurized gas dissolved liquid and generate ultra fine bubbles.

This utility model discloses an exhaust structure for a dissolving tank in an alkali recovery boiler, including a dissolving tank shell, an exhaust pipe installed on the dissolving tank shell, an exhaust pipe connecting box inside the dissolving tank, an outlet of the exhaust pipe connecting box connected to the inlet of the exhaust pipe, a grid installed at the inlet of the exhaust pipe connecting box, and flushing pipes installed on both the exhaust pipe connecting box and the grid, with the flushing pipes connected to pipes, allowing water to flow into the exhaust pipe connecting box along the pipes and flushing pipes; when gas passes through the grid, dust and unvaporized liquid droplets in the gas are captured by the grid, purifying the gas discharged through the dissolving tank by using the grid, reducing the dust content of the discharged gas and increasing the dryness of the gas, and the flushing pipes are installed to periodically flush the exhaust pipe connecting box and the grid, reducing the risk of sodium salt caking and corrosion in the exhaust pipe, and improving the continuous operation cycle of the system.

PURPOSE: To provide a production apparatus and a production method of water mixed with a carbonic acid fine bubble that enable addition of a carbonic acid fine bubble generation effect to be easily performed even for a using shower head as it is, can finely divide a fine bubble, and thereby, further improve blood circulation promoting effect, cleaning effect or the like.CONSTITUTION: A production apparatus of water mixed with a carbonic acid fine bubble has a configuration in which a bath agent storage part is connected to a part between a hose and a shower head, a carbonic acid bath agent can be stored in the bath agent storage part by an open and close mechanism of a lid body while maintaining connection with both the shower head and the hose, at least a part of the bath agent storage part is formed by a transparent member, and the stored carbonic acid bath agent is visible from outside.SELECTED DRAWING: Figure 1

The utility model discloses efficient impurity separation equipment for waste asphalt regeneration, and relates to the technical field of waste asphalt recycling equipment, the outlet end of a mixing box is connected with the inlet end of a centrifugal machine through a pipeline, a solvent box is fixedly arranged on a top plate of the mixing box, and a dryer is arranged behind the mixing box; the solid material outlet end of the centrifugal machine is connected with one inlet end of the dryer through a pipeline, the wet type condenser is arranged in the solvent box, the outlet end of the dryer is connected with the inlet end of the wet type condenser through a pipeline, and the liquid inlet pipe is fixed to a rear side plate of the solvent box in a penetrating mode. The outlet end of the wet condenser is connected with the liquid inlet pipe through a pipeline; the system is provided with a front mixing and dissolving device and a preliminary precipitation treatment structure matched with the front mixing and dissolving device to realize primary treatment of solid waste in a solution, and is also provided with a recycling component for a solvent in the solid waste to realize high efficiency, low consumption, energy conservation and emission reduction of production.

Reduce contamination and enable efficient generation of higher-concentration UFB water. 【Solution means】A plurality of tanks 10A and 10B that are connected to each other via pipelines 21A, 21B, etc. and temporarily store a solution BW in which a gas for dissolution is dissolved; among the plurality of tanks 10A and 10B, a vacuum pump 90 that sets a predetermined pressure difference between one tank and the other tank; and controls the vacuum pump 90 to alternately switch the pressure in one tank and the pressure in the other tank, and repeat the movement of the solution BW between one tank and the other tank via the pipelines 21A, 21B. When generating bubble water containing a predetermined number of ultra-fine bubbles, control the vacuum pump 90 so that when the movement of the solution BW from one tank to the other tank ends, the gas remaining in one tank is evacuated and sent to the other tank.