Method and device for preparing nano bubble water

Abstract

The invention provides a method and device for preparing nano bubble water, and the method comprises the following steps: enabling water jet provided by a first water path to enter water provided by a second water path to form mixed water of the first water path and the second water path; the pressure intensity of water provided by the first water way is larger than that of water provided by the second water way. And the temperature of water provided by the first water path is higher than that of water provided by the second water path.

Description

Technical Field

[0001] The present invention relates to the field of intelligent manufacturing technology, and in particular to a method and device for preparing nano bubble water. Background Art

[0002] Nano-scale bubbles in pure water have special surface electronegativity, free radical production and surface adsorption. Such characteristics have application prospects in many fields, especially for the biological antioxidant properties of organisms, and have the alternative effect of antioxidants. Its mechanism of action is different from that of various chemical antioxidants. Its main body is the physical manifestation of the expansion and contraction effect of nano-scale micro-bubbles in pure water, so it has non-toxic side effects that other chemical antioxidants do not have, and thus has a huge application potential in the field of biological antioxidant applications.

[0003] The preparation of nano-bubbles, especially those below 100nm, requires relatively harsh process conditions, such as low temperature and pressure maintenance, which are more stringent than industrial production. At the same time, the bubble morphology of the nano-bubble water prepared by this scheme is greatly affected during transportation, storage, and use after it returns to normal state, thus affecting its functional performance during use. Summary of the invention

[0004] The object of the present invention is to provide a method and device for preparing nano bubble water, so as to solve the problem that the nano bubble water prepared by the existing process is easily affected by the environment.

[0005] In order to solve the above technical problems, the present invention provides a method for preparing nano bubble water, comprising:

[0006] The water jet provided by the first water channel enters the water provided by the second water channel to form mixed water of the first water channel and the second water channel;

[0007] wherein the pressure of water provided by the first water channel is greater than the pressure of water provided by the second water channel; and

[0008] The temperature of the water provided by the first water path is greater than the temperature of the water provided by the second water path.

[0009] The high-temperature and high-pressure water jet provided by the first water channel enters the second water channel at normal temperature and pressure. The high-temperature and high-pressure water body forms a drastic pressure jump in the second water channel, thereby forming a dense "cavitation" effect in the second water channel, and then forming a large number of bubbles of various particle sizes in the second water channel. The "cavitation" effect refers to the process of the formation, development and collapse of cavities (cavitation bubbles) of steam or gas inside the liquid or on the liquid-solid interface when the local pressure drops below the saturated vapor pressure. Cavitation often occurs in high-speed flowing liquids.

[0010] Optionally, in the method for preparing nano bubble water, the method further comprises:

[0011] By adjusting the pressure of the water provided by the first waterway and / or the pressure of the water provided by the second waterway, the pressure difference between the water provided by the first waterway and the water provided by the second waterway is adjusted, and the intensity of the pressure jump is further adjusted;

[0012] The "cavitation" effect also includes: the main particle size distribution of the mixed water can be adjusted by regulating the intensity of the pressure jump. Therefore, the main particle size distribution of the bubbles can be adjusted by adjusting the pressure difference between the first water channel and the second water channel in advance.

[0013] In addition, by adjusting the temperature of the water provided by the first waterway and / or the temperature of the water provided by the second waterway, the temperature difference between the water provided by the first waterway and the water provided by the second waterway is adjusted, and the temperature jump intensity is further adjusted. By adjusting the temperature jump intensity, the degree of the "temperature compensation" effect may be adjusted.

[0014] The "temperature compensation" effect means that when nano bubble water forms bubbles at room temperature or even high temperature, some of the bubbles formed do not burst under harsh conditions. Under transportation, storage and use conditions, which are generally room temperature, the storage conditions of the nano bubble water remain unchanged, and these bubbles will not burst easily, so their efficiency is higher than that of bubbles formed at low temperatures.

[0015] Optionally, in the method for preparing nano bubble water, the method further comprises:

[0016] Heat the pure water; this part of pure water is introduced from outside and is used as a continuous supplement for the output finished product nano bubble water;

[0017] The heated pure water is used as water provided by the first water path;

[0018] Cooling the mixed water of the first water channel and the second water channel to form cold water; and

[0019] Cold water is used as water and / or nano bubble water provided by the second water channel. The cold water has two branches, one of which is returned to the second water channel to be mixed with the water in the first water channel again, and the other branch is output as a finished nano bubble water. Whether it can be output as a finished nano bubble water can be determined based on the bubble density and quantity or by setting a certain cycle time.

[0020] The present invention also provides a device for preparing nano bubble water, comprising:

[0021] a jet module configured to inject a water jet provided by the first water channel into water provided by the second water channel to form mixed water of the first water channel and the second water channel; and

[0022] The regulating module is configured to regulate the temperature and / or pressure of the water provided by the first water path, and / or regulate the temperature and / or pressure of the water provided by the second water path, so that:

[0023] The pressure of water provided by the first waterway is greater than the pressure of water provided by the second waterway; and

[0024] The temperature of the water provided by the first water path is greater than the temperature of the water provided by the second water path.

[0025] Optionally, in the device for preparing nano bubble water, the jet module comprises:

[0026] a high-pressure flow path configured to serve as a first water path and to eject water of the first water path toward the ejection tube;

[0027] A jet tube configured to be connected in series in the low-pressure circuit; and

[0028] The low-pressure circuit is configured to serve as a second water path and circulates water of the second water path to the jet tube.

[0029] When high-temperature and high-pressure water is coupled from the high-pressure flow path into the low-pressure circuit through the jet tube, a drastic pressure jump is formed in the low-pressure circuit, thereby forming a dense "cavitation" effect in the low-pressure circuit, and then forming a large number of bubbles of various particle sizes therein.

[0030] Optionally, in the device for preparing nano bubble water, the jet tube comprises:

[0031] The pipe body is constructed as a hollow cylinder with a diameter between 30 cm and 100 cm. Both end surfaces of the hollow cylinder are connected in series to the pipeline of the low-pressure circuit. The length of the pipe body is between 100 cm and 500 cm.

[0032] The high-pressure jet tube is constructed as a hollow cylinder with a diameter between 2 cm and 10 cm, and its end faces are respectively connected to the side cylindrical surface of the tube body and the pipeline of the high-pressure flow path; and

[0033] There are multiple coupling jet points distributed between the low-pressure circuit and the high-pressure flow path, namely, the high-pressure jet ends on the pipe body, and the center distance between each high-pressure jet end is between 10 cm and 30 cm.

[0034] The high-pressure jet end is constructed as a hollow cone, which is connected to the bottom end of the high-pressure jet tube and extends toward the inner side of the tube body. The bottom surface of the high-pressure jet end is located at the connecting surface between the high-pressure jet tube and the tube body. The top end is conical and has an opening at the tip, which is the jet port located inside the tube body.

[0035] Optionally, in the device for preparing nano bubble water, the regulating module comprises:

[0036] A first temperature regulating module is configured to heat pure water to provide it to the high-pressure flow path; wherein the first temperature regulating module includes a heating module for heating pure water and a hot water buffer module for providing the heated pure water to the high-pressure flow path;

[0037] a second temperature regulating module configured to cool the water flowing out of the jet tube to reduce the water temperature in the low-pressure circuit; wherein the second temperature regulating module comprises a warm water buffer module for providing the mixed water to the heat exchange module, and a heat exchange module for cooling the mixed water;

[0038] A first temperature sensor is arranged in the high pressure flow path;

[0039] A second temperature sensor is arranged in the low-pressure circuit near the water outlet end of the jet tube;

[0040] A third temperature sensor is arranged in the low-pressure circuit near the water inlet end of the jet tube;

[0041] a first water pump disposed in the high-pressure flow path;

[0042] A second water pump is arranged between the warm water buffer module and the heat exchange module;

[0043] A third water pump is arranged at the water inlet end of the low-pressure circuit close to the jet pipe;

[0044] A first valve is arranged in the high pressure flow path;

[0045] A second valve is arranged in the low-pressure circuit near the water outlet end of the jet pipe; and

[0046] The third valve is arranged in the low-pressure circuit near the water inlet end of the jet pipe.

[0047] Optionally, the device for preparing nano bubble water further comprises a pretreatment module configured to provide pure water to the heating module and provide coolant to the heat exchange module;

[0048] The pretreatment module includes a sand filter module, a carbon filter module and a RO reverse osmosis module.

[0049] In the method and device for preparing nano bubble water provided by the present invention, a water jet provided by a first water channel enters into water provided by a second water channel to form water mixed with the first water channel and the second water channel; the pressure of the water provided by the first water channel is greater than the pressure of the water provided by the second water channel; and the temperature of the water provided by the first water channel is greater than the temperature of the water provided by the second water channel, so that a high-temperature and high-pressure water jet enters into a water body at normal temperature and pressure, and the high-temperature and high-pressure water body forms a drastic pressure jump at normal temperature and pressure, thereby forming a dense "cavitation" effect in the second water channel, and then forming a large number of bubbles of various particle sizes in the second water channel.

[0050] Nano bubble water forms bubbles at room temperature or even high temperature. Some of the bubbles do not burst under harsh conditions. Under transportation, storage and use conditions, which are generally room temperature, the storage conditions of the nano bubble water remain unchanged, and these bubbles will not burst easily. Therefore, their efficiency is higher than that of bubbles formed at low temperatures.

[0051] The present invention provides a preparation process based on high-pressure circulating jet as the core, which can meet the requirements of batch preparation and has the characteristics of controllable bubble concentration and particle size. The stability of nanobubbles in normal water bodies is ensured through the "temperature compensation" process. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 is a schematic diagram of a process flow in one embodiment of the present invention;

[0053] Figure 2 is a schematic diagram of the structure of a jet tube in one embodiment of the present invention;

[0054] Figure 3 is a schematic diagram of the effect of "temperature compensation" in one embodiment of the present invention;

[0055] Figure 4 is a temperature compensation comparison schematic diagram of an embodiment of the present invention;

[0056] Figure 5 Schematic diagram of the effect of jet pressure difference and jet aperture on concentration in one embodiment of the present invention;

[0057] Figure 6 Schematic diagram of the effect of jet pressure difference and jet aperture on particle size in one embodiment of the present invention;

[0058] Figure 7 is a schematic diagram of the effect of flow ratio on concentration in one embodiment of the present invention;

[0059] As shown in the figure:

[0060] 100-pretreatment module; 101-external water inlet; 102-sand filter module; 103-carbon filter module; 104-RO reverse osmosis module; 105-coolant;

[0061] 200-temperature compensation module; 201-heating module; 203-hot water buffer module; 204-warm water buffer module; 205-heat exchange module; 206-warm wastewater; 207-mixed water;

[0062] 300-jet module; 301-first water pump / high-pressure pump; 302 first temperature sensor; 303-first valve / high-pressure valve; 304-high-pressure flow path; 305-high-pressure jet tube; 305A-high-pressure jet end; 306-third water pump / low-pressure pump; 307-low-pressure circuit; 308-third valve / low-pressure valve; 309-jet tube / tube body; 310-second valve / coupling valve; 311-second temperature sensor; 312-third temperature sensor; 313-cold water tank; 314-second water pump / heat exchange pump; 315-finished cold water. DETAILED DESCRIPTION

[0063] The present invention will be further described below in conjunction with specific embodiments with reference to the accompanying drawings.

[0064] It should be noted that the components in the figures may be shown exaggeratedly for the sake of illustration and are not necessarily true to scale. In the figures, identical or functionally identical components are provided with the same reference numerals.

[0065] In the present invention, unless otherwise specified, "arranged on...", "arranged above..." and "arranged above..." do not exclude the existence of an intermediate between the two. In addition, "arranged on or above..." merely indicates the relative positional relationship between two components, and in certain cases, such as after reversing the product direction, it can also be converted into "arranged below or below...", and vice versa.

[0066] In the present invention, each embodiment is only intended to illustrate the aspects of the present invention and should not be construed as limiting.

[0067] In the present invention, unless otherwise specified, the quantifiers "a", "an" and "an" do not exclude the presence of a plurality of elements.

[0068] It should also be noted that in the embodiments of the present invention, for the sake of clarity and simplicity, only a portion of the parts or components may be shown, but those of ordinary skill in the art will understand that under the teachings of the present invention, the required parts or components may be added according to the needs of the specific scenario. In addition, unless otherwise specified, the features in different embodiments of the present invention may be combined with each other. For example, a feature in the second embodiment may be used to replace a corresponding or functionally identical or similar feature in the first embodiment, and the resulting embodiment also falls within the disclosure scope or recorded scope of the present application.

[0069] It should also be noted that within the scope of the present invention, the terms "same", "equal", "equal to" and the like do not mean that the values ​​of the two are absolutely equal, but allow a certain reasonable error, that is, the terms also cover "substantially the same", "substantially equal", "substantially equal to". By analogy, in the present invention, the terms "perpendicular to", "parallel to" and the like indicating directions also cover the meanings of "substantially perpendicular to" and "substantially parallel to".

[0070] In addition, the numbering of the steps of the methods of the present invention does not limit the execution order of the method steps. Unless otherwise specified, the method steps can be executed in different orders.

[0071] The method and device for preparing nano bubble water proposed by the present invention are further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer according to the following description. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0072] The object of the present invention is to provide a method and device for preparing nano bubble water, so as to solve the problem that the nano bubble water prepared by the existing process is easily affected by the environment.

[0073] In view of the problems existing in the background technology, the present invention provides a method and device for batch preparation of small-particle nano bubble water, which can also ensure that the prepared nano bubble water is stably maintained under normal conditions.

[0074] To achieve the above object, the present invention provides a device for preparing nano bubble water. Figure 1 FIG. 1 shows a device for preparing nano bubble water in one embodiment of the present invention, such as Figure 1 As shown, the device for preparing nano bubble water comprises:

[0075] The jet module 300 is configured to inject the water jet provided by the first water path (high-pressure flow path 304) into the water provided by the second water path (low-pressure circuit 307) to form the water 207 mixed by the first water path (high-pressure flow path 304) and the second water path (low-pressure circuit 307); and

[0076] The regulating module (also including the temperature compensation module 200) is configured to regulate the temperature and / or pressure of the water provided by the first water circuit, and / or regulate the temperature and / or pressure of the water provided by the second water circuit, so that: the pressure of the water provided by the first water circuit is greater than the pressure of the water provided by the second water circuit; and the temperature of the water provided by the first water circuit is greater than the temperature of the water provided by the second water circuit.

[0077] One embodiment of the present invention also provides a method for preparing nano bubble water, such as Figure 1As shown, it includes: allowing the water jet provided by the first water circuit (high-pressure flow circuit 304) to enter the water provided by the second water circuit (low-pressure circuit 307) to form water 207 mixed with the first water circuit and the second water circuit; the water provided by the low-pressure circuit 307 comes from the cold water tank 313, and the water in the cold water tank 313 includes cold water provided to the low-pressure circuit 307 and finished nano bubble water 315 output as finished cold water.

[0078] The pressure of water provided by the first water channel is greater than the pressure of water provided by the second water channel; and the temperature of water provided by the first water channel is greater than the temperature of water provided by the second water channel.

[0079] In the method and device for preparing nano bubble water provided in this embodiment, by allowing the high-temperature and high-pressure water jet provided by the first water channel to enter the second water channel at normal temperature and pressure, the high-temperature and high-pressure water body forms a drastic pressure jump in the second water channel, thereby forming a dense "cavitation" effect in the second water channel, and then forming a large number of bubbles of various particle sizes in the second water channel. The "cavitation" effect refers to the process of formation, development and collapse of cavities (cavitation bubbles) of steam or gas inside the liquid or on the liquid-solid interface when the local pressure drops below the saturated vapor pressure. Cavitation often occurs in high-speed flowing liquids.

[0080] In the method for preparing nano bubble water described in an embodiment of the present invention, it also includes: by adjusting the pressure of water provided by the first water channel and / or the pressure of water provided by the second water channel, adjusting the pressure difference between the water provided by the first water channel and the water provided by the second water channel, and further adjusting the pressure jump intensity; the "cavitation" effect also includes: by regulating the pressure jump intensity of the mixed water, the main particle size distribution thereof can be adjusted and controlled, therefore, the main bubble particle size distribution can be adjusted by adjusting the pressure difference between the first water channel and the second water channel in advance.

[0081] In addition, by adjusting the temperature of the water provided by the first waterway and / or the temperature of the water provided by the second waterway, the temperature difference between the water provided by the first waterway and the water provided by the second waterway is adjusted, and the temperature jump intensity is further adjusted. By adjusting the temperature jump intensity, the degree of the "temperature compensation" effect may be adjusted.

[0082] The "temperature compensation" effect means that when nano bubble water forms bubbles at room temperature or even high temperature, some of the bubbles formed do not burst under harsh conditions. Under transportation, storage and use conditions, which are generally room temperature, the storage conditions of the nano bubble water remain unchanged, and these bubbles will not burst easily, so their efficiency is higher than that of bubbles formed at low temperatures.

[0083] like Figure 1As shown, in the method for preparing nano bubble water provided in this embodiment, the method further includes: heating pure water; this part of pure water comes from the external water inlet 101, and is continuously replenished as the output finished product nano bubble water 315; the heated pure water is used as the water (high temperature and high pressure water body) provided by the first water path (high pressure flow path 304);

[0084] The water 207 (warm water) mixed by the first water circuit (high-pressure flow circuit 304) and the second water circuit (low-pressure loop 307) is cooled to form cold water, and the cold water is sent to the cold water tank 313; and the cold water in the cold water tank 313 is used as the water and / or nano bubble water 315 provided by the second water circuit (low-pressure loop 307). The cold water in the cold water tank 313 has two branches, one branch returns to the second water circuit (low-pressure loop 307) and mixes with the water in the first water circuit again, and the other branch is output as the finished nano bubble water 315. Whether it can be output as the finished nano bubble water can be determined according to the bubble density and quantity, or by setting a certain cycle time.

[0085] In one embodiment of the present invention, in the device for preparing nano bubble water, the jet module 300 includes: a high-pressure flow path 304, configured as a first water path, jetting water of the first water path to a jet tube 309; the jet tube 309, configured to be connected in series to a low-pressure circuit 307; and a low-pressure circuit 307, configured as a second water path, circulating water of the second water path to the jet tube.

[0086] When the high-temperature and high-pressure water is coupled from the high-pressure flow path 304 into the low-pressure loop 307 via the jet tube 309, a drastic pressure jump is formed in the low-pressure loop 307, thereby forming a dense "cavitation" effect in the low-pressure loop 307, and then forming a large number of bubbles of various particle sizes therein.

[0087] Figure 2 FIG. 1 shows a schematic diagram of the structure of a jet tube according to an embodiment of the present invention. Figure 2 As shown, in the device for preparing nano bubble water provided in this embodiment, the jet tube 309 includes: a tube body 309, which is constructed as a hollow cylinder with a diameter between 30 cm and 100 cm, and the two end faces of the hollow cylinder are connected in series to the pipeline of the low-pressure circuit, and the length of the tube body 309 is between 100 cm and 500 cm; a high-pressure jet tube 305, which is constructed as a hollow cylinder with a diameter between 2 cm and 10 cm, and its end faces are respectively connected to the side cylinder surface of the tube body 309 and the pipeline of the high-pressure flow path 304; and there are multiple coupling jet points distributed between the low-pressure circuit 307 and the high-pressure flow path 304, that is, the high-pressure jet end 305A on the tube body, and the center distance between each high-pressure jet end 305A is between 10 cm and 30 cm.

[0088] In one embodiment of the present invention, the high-pressure jet end 305A is constructed as a hollow cone, which is connected to the bottom end of the high-pressure jet tube 305 and extends toward the inner side of the tube body 309. The bottom surface of the high-pressure jet end 305A is located at the connecting surface between the high-pressure jet tube 305 and the tube body 309. The top end is conical and has an opening at the tip, which is the jet port located inside the tube body 309.

[0089] In one embodiment of the present invention, in the device for preparing nano bubble water, the regulating module for regulating the temperature and / or pressure of water provided by the first water channel and / or regulating the temperature and / or pressure of water provided by the second water channel includes a temperature compensation module 200, and the temperature compensation module 200 includes a first temperature regulating module and a second temperature regulating module.

[0090] In one embodiment of the present invention, the first temperature regulating module is configured to heat pure water to provide it to the high-pressure flow path 304; wherein the first temperature regulating module includes a heating module 201 for heating pure water, and a hot water buffer module 203 for providing the heated pure water to the high-pressure flow path 304; the second temperature regulating module is configured to cool the water flowing out of the jet tube 309 to reduce the water temperature in the low-pressure circuit 307; wherein the second temperature regulating module includes a warm water buffer module 204 for providing the mixed water 207 to the heat exchange module, and a heat exchange module 205 for cooling the mixed water 207, wherein the coolant 105 of the heat exchange module 205 comes from the waste water of the pretreatment module, which is more energy-saving, and the warm waste water 206 of the heat exchange module 205 can be directly discharged;

[0091] In one embodiment of the present invention, Figure 1 As shown, the regulating module for monitoring the water temperature of the first water circuit and the second water circuit also includes: a first temperature sensor 302, which is arranged in the high-pressure flow circuit 304; a second temperature sensor 311, which is arranged at the water outlet end of the low-pressure circuit 307 close to the jet tube 309; and a third temperature sensor 312, which is arranged at the water inlet end of the low-pressure circuit 307 close to the jet tube 309;

[0092] In one embodiment of the present invention, Figure 1 As shown, the regulating module for monitoring the water pressure of the first waterway and the second waterway also includes: a first water pump 310, which is arranged in the high-pressure flow path 304; a second water pump 314, which is arranged between the warm water buffer module 204 and the heat exchange module 205; and a third water pump 306, which is arranged at the water inlet end of the low-pressure circuit 307 close to the jet pipe 309;

[0093] In one embodiment of the present invention, Figure 1As shown, the regulating module for monitoring the water pressure of the first water circuit and the second water circuit also includes: a first valve 303, which is arranged in the high-pressure flow circuit 304; a second valve 310, which is arranged at the water outlet end of the low-pressure circuit 307 close to the jet tube 309; and a third valve 308, which is arranged at the water inlet end of the low-pressure circuit 307 close to the jet tube 309.

[0094] like Figure 1 As shown, in the device for preparing nano bubble water, a pretreatment module 100 is also included, which is configured to provide pure water to the heating module 201 by pretreating the external inlet water 101, and to provide coolant 105 to the heat exchange module 205 for the additional benefit of energy saving; wherein the pretreatment module 100 includes a sand filter module 102, a carbon filter module 103 and a RO reverse osmosis module 104.

[0095] The present invention provides a method for preparing nanobubble water based on high-pressure circulating jet as the core, which can meet the requirements of batch preparation and has the characteristics of controllable bubble concentration and particle size. The stability of nanobubbles in normal water bodies is ensured through the "temperature compensation" process.

[0096] The present invention provides a process for generating small-diameter nanobubbles with a particle size of less than 50 nm in water by using a high-pressure jet device, which mainly includes a pretreatment process, a high-pressure jet process, and a temperature compensation process.

[0097] In one embodiment of the present invention, the pretreatment process includes filtration treatment, which prepares the water to meet drinking water standards through sand filtration, carbon filtration and RO reverse osmosis technology.

[0098] In one embodiment of the present invention, the high-pressure jet process is generated by coupling a low-pressure loop 307 and a high-pressure flow path 304. The low-pressure loop 307 and the high-pressure flow path 304 are driven by a low-pressure pump 306 and a high-pressure pump 301, respectively. There are multi-point distributed coupling jet points (high-pressure jet end 305A) between the low-pressure loop 307 and the high-pressure flow path 304. When the water body is coupled into the low-pressure loop 307 from the high-pressure flow path 304 via the jet points, a drastic pressure jump is formed in the low-pressure loop 307, thereby forming a dense "cavitation" effect in the low-pressure loop, and then forming a large number of bubbles of various particle sizes therein. The main particle size distribution can be adjusted and controlled by regulating the intensity of the pressure jump.

[0099] In one embodiment of the present invention, the temperature compensation process is composed of heating, hot water buffering, heat exchange, and warm water buffering. First, the pre-treated pure water is heated to a predetermined temperature by the boiler for hot water buffering; and the high-pressure pump 301 of the high-pressure flow path extracts the hot water from the hot water buffer module 203 into the high-pressure flow path 304, and enters the warm water buffer module 204 after coupling with the cold water jet of the low-pressure circuit 307. The mixed water 207 is cooled to room temperature through the heat exchange module 205, that is, the cold water in the cold water tank 313. After completing the predetermined preparation target, the cold water in the cold water tank is the target generated finished small-particle nano bubble water. After the temperature compensation process, the nano bubble particle size in the finished cold water 315 changes due to the expansion and contraction during the temperature compensation process, and the larger part of its particle size is screened out in the coupling section and the warm water heat exchange section, while the bubbles of the expected particle size are further shrunk to a stable state in the warm water buffer module and the heat exchange module.

[0100] In one embodiment of the present invention, the pressure range of the high-pressure flow path is between 150KPA-2000KPA; the pressure difference between the low-pressure circuit and the high-pressure flow path is greater than 100KPA; during the jet process, the flow ratio between the high-pressure flow path and the low-pressure circuit is less than 1:10; the jet tube 309 is tubular, and the jet points are distributed along the water path in the tube, and the distribution points are spaced between 10CM-200CM; Figure 3 FIG. 4 shows a schematic diagram of temperature compensation according to an embodiment of the present invention. Figure 3 As shown, the temperature of the water output by the hot water buffer module is between 60-95°C, the temperature of the mixed water 207 is between 30-60°C, and the temperature of the water in the cold water tank is below 30°C; the water in the cold water tank 313 can be used as water supply for the low-pressure circuit, and can be circulated into the high-pressure jet pipe and the temperature compensation module to achieve the expected particle size and concentration of nanobubbles in a cyclic treatment manner; as a consideration for energy saving, the heat exchange module uses pre-treated wastewater as coolant;

[0101] The external water inlet 101 introduces raw water (tap water), which is processed by sand filtration 102, carbon filtration 103 and RO reverse osmosis 104 to become pure water that meets drinking standards. The cold wastewater 105 of the RO reverse osmosis 104 is introduced into the heat exchange module 205 as a coolant for the finished warm water (mixed water 207), and is discharged from the wastewater end 206 after heat exchange.

[0102] The temperature compensation module 200 is composed of a heating module 201, a hot water buffer module 203, a warm water buffer module 204 and a heat exchange module 205. After passing through the heating module 201, the pure water is introduced into the high-pressure jet pipe 305 by the high-pressure pump 301. The high-pressure flow path 304 can detect and control the temperature by the first temperature sensor 302 and control the flow and pressure of the high-pressure flow path 304 by the first valve 303. The high-pressure jet pipe 305 has a high-pressure jet end 305A with a certain taper after the diameter is reduced, which is distributed at a certain distance in the jet pipe 309, and serves as a part of the low-pressure circuit 307.

[0103] like Figure 2 As shown, the low-pressure circuit 307 is filled with cold water from the cold water tank 313 by the low-pressure pump 306 and flows into the jet tube 309. The temperature of the low-pressure cold water 320 is controlled by the third temperature sensor 312, and the flow rate and pressure of the low-pressure cold water are controlled by the low-pressure valve 308. The low-pressure cold water 320 is mixed with the high-pressure hot water 321 ejected from the high-pressure jet tube 305. The process instantly acts in the jet tube 309 to form violent turbulence and pressure jump, generating a large number of nano bubbles. The process is repeated many times along the flow direction. In the hot and cold convection, the bubbles screen out the larger particle size and unstable structure in the multiple expansions and contractions. After the high-pressure jet treatment, it flows to the warm water buffer module 204, and the pressure in the jet tube 309 can be regulated by the coupling valve 310, and the second temperature sensor 311 is used to monitor the generated small-particle nano bubble warm water (mixed water 207).

[0104] The heat exchange module 205, the coolant 105 of which comes from the cold wastewater generated by the RO reverse osmosis 104, is discharged after heat exchange with the small-size nanobubble warm water to form warm wastewater 206. After the finished warm water is input into the heat exchange module 205 by the heat exchange pump 314, the finished cold water 315 is generated. During the heat exchange process, the small-size nanobubbles in the water body further shrink and stabilize during the cooling process and are stored in the cold water tank 313. After meeting the technical indicators of the prepared small-size nanobubbles, this part is output to the filling end or used as finished cold water.

[0105] There is a controllable temperature difference and a large pressure difference between the high-pressure hot water 321 and the low-pressure cold water 320, and the temperature difference and pressure difference serve as important process indicators for the formation and size of small-sized nanobubbles in the finished warm water (mixed water 207) during the process. The temperature difference between the finished warm water (mixed water 207) and the finished cold water 315 after being processed by the heat exchange module 205 serves as an important indicator for controlling the stability of the formation of small-sized nanobubbles.

[0106] Figure 3 FIG. 4 shows a schematic diagram of temperature compensation according to an embodiment of the present invention. Figure 3As shown, the cold water in the low-pressure circuit used comes from the finished cold water 315 with a temperature of T2, and its source comes from the hot water buffer module 203, and its hot water temperature is T4. After coupling the jet, it can form finished warm water (mixed water 207) with a temperature of T3. After controlling the flow difference between the high-pressure flow path and the low-pressure circuit, and matching their flows, all finished cold water 315 can be processed by the heating module 201, that is, the sterilization process can be achieved at the same time.

[0107] Compared with the existing system solutions, the advantages of the present invention are: a large number of controllable nanobubbles are dynamically prepared during the flow of water driven by a pump, which meets the needs of industrial preparation, the system is simple, and the particle size (10-50nm particle size) and concentration (2X10^6-2X10^9 / mL) of the nanobubbles are controllable during the process; the particle size of the nanobubbles under normal conditions is constrained by the temperature compensation process to protect their stability under normal conditions, which can prevent a large number of nanobubbles from being lost in the water during normal packaging and transportation, and meet the stability requirements for commercial applications. It has extremely excellent processability, economy and reliability.

[0108] Figure 4 FIG. 4 shows a temperature compensation comparison diagram of an embodiment of the present invention. Figure 4 As shown, when there is a different temperature difference between the first water channel and the second water channel, the nanobubbles have different retention times and different concentration changes. Without temperature compensation, the nanobubbles will decelerate very quickly, dropping by half within a month; while using compensation temperature within a certain range, the attenuation can be controlled within 5%-10%;

[0109] Figure 5 FIG. 4 shows the influence of jet pressure difference and jet diameter on concentration of an embodiment of the present invention; Figure 5 As shown, the inventors of the present invention have found that the corresponding relationship between the jet pressure difference and the jet aperture size has an impact on the concentration of the generated nanobubbles, and its impact diagram is shown in FIG. Figure 5 As shown, according to Figure 5 The corresponding relationship found by the curve lookup method of the present invention can significantly increase the concentration of nanobubbles;

[0110] Figure 6 FIG. 4 shows the influence of the jet pressure difference and the jet aperture on the particle size according to an embodiment of the present invention; Figure 6 As shown, the inventors of the present invention have found that the corresponding relationship between the jet pressure difference and the jet aperture size has a relatively linear effect on the particle size of the generated nanobubbles. Figure 6 The method of looking up the curve in a table can control the range of particle size ultimately generated, balancing the concentration requirements;

[0111] Figure 7FIG. 4 shows the influence of flow rate ratio on concentration of an embodiment of the present invention; Figure 7 As shown, the jet flow ratio has a great influence on the concentration of the final generated nanobubbles. The solution adopted by the present invention can significantly improve the concentration. In practical engineering applications, the jet ratio needs to be considered in combination with temperature compensation because it has a certain influence mechanism. The optimization of the jet ratio does not refer to its stability because the jet ratio parameter will affect the temperature difference range of temperature compensation.

[0112] In summary, the above embodiments describe in detail different configurations of the method and device for preparing nano bubble water. Of course, the present invention includes but is not limited to the configurations listed in the above embodiments. Any content that is changed based on the configurations provided in the above embodiments belongs to the scope of protection of the present invention. Those skilled in the art can draw inferences from the contents of the above embodiments.

[0113] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0114] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A method for preparing nano bubble water, characterized in that: include: The water jet provided by the first water channel enters the water provided by the second water channel to form mixed water of the first water channel and the second water channel; wherein the pressure of water provided by the first water channel is greater than the pressure of water provided by the second water channel; and The temperature of the water provided by the first water path is greater than the temperature of the water provided by the second water path.

2. The method for preparing nano bubble water according to claim 1, characterized in that: Also includes: adjusting the pressure difference between the water provided by the first waterway and the water provided by the second waterway by adjusting the pressure of the water provided by the first waterway and / or the pressure of the water provided by the second waterway; and / or By adjusting the temperature of the water provided by the first waterway and / or the temperature of the water provided by the second waterway, the temperature difference between the water provided by the first waterway and the water provided by the second waterway is adjusted.

3. The method for preparing nano bubble water according to claim 1, characterized in that: Also includes: Heat pure water; The heated pure water is used as water provided by the first water path; Cooling the mixed water from the first water channel and the second water channel to form cold water; as well as Cold water and / or nano bubble water are provided as the second water path.

4. A device for preparing nano bubble water, characterized in that: include: A jet module is configured to inject a water jet provided by the first water channel into water provided by the second water channel to form mixed water of the first water channel and the second water channel; as well as The regulating module is configured to regulate the temperature and / or pressure of the water provided by the first water path, and / or regulate the temperature and / or pressure of the water provided by the second water path, so that: The pressure of water provided by the first waterway is greater than the pressure of water provided by the second waterway; and The temperature of the water provided by the first water path is greater than the temperature of the water provided by the second water path.

5. The device for preparing nano bubble water according to claim 4, characterized in that: The jet module comprises: a high-pressure flow path configured to eject water of the first water path toward the ejector tube; A jet tube configured to be connected in series in the low-pressure circuit; and The low-pressure circuit is configured to circulate water of the second water path provided to the jet tube.

6. The device for preparing nano bubble water according to claim 5, characterized in that: The jet tube comprises: The pipe body is constructed as a hollow cylinder, and both end surfaces of the hollow cylinder are connected in series to the pipeline of the low-pressure circuit; The high-pressure jet tube is constructed as a hollow cylinder, and its end faces are respectively connected to the side cylindrical surface of the tube body and the pipeline of the high-pressure flow path; and The high-pressure jet end is constructed as a hollow cone, and the bottom surface is located at the connection surface between the high-pressure jet tube and the tube body, and the top end is provided with a jet port located inside the tube body.

7. The device for preparing nano bubble water according to claim 5, characterized in that: The adjustment module comprises: A first temperature adjustment module is configured to heat pure water to provide it to the high-pressure flow path; a second temperature regulating module, configured to cool the water flowing out of the jet tube to reduce the water temperature in the low-pressure circuit; A first temperature sensor is arranged in the high pressure flow path; A second temperature sensor is arranged in the low-pressure circuit near the water outlet end of the jet tube; and The third temperature sensor is arranged in the low-pressure circuit near the water inlet end of the jet tube.

8. The device for preparing nano bubble water according to claim 7, characterized in that: The first temperature adjustment module includes a heating module for heating pure water and a hot water buffer module for providing the heated pure water to the high-pressure flow path; The second temperature adjustment module includes a warm water buffer module that provides mixed water to the heat exchange module, and a heat exchange module that cools the mixed water.

9. The device for preparing nano bubble water according to claim 8, characterized in that: The adjustment module also includes: a first water pump disposed in the high-pressure flow path; A second water pump is arranged between the warm water buffer module and the heat exchange module; A third water pump is arranged at the water inlet end of the low-pressure circuit close to the jet pipe; A first valve is arranged in the high pressure flow path; A second valve is arranged in the low-pressure circuit near the water outlet end of the jet pipe; and The third valve is arranged in the low-pressure circuit near the water inlet end of the jet pipe.

10. The device for preparing nano bubble water according to claim 8, characterized in that: Also included is a pre-processing module, which is configured to provide pure water to the heating module and provide cooling liquid to the heat exchange module; The pretreatment module includes a sand filter module, a carbon filter module and a RO reverse osmosis module.

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