Bubble generating device and nanobubble generating system

Abstract

The invention discloses a bubble generating device and a nano bubble generating system, and the bubble generating device comprises a housing which is provided with a feed port and a discharge port, and the interior of the housing is a working cavity; the material distributor is located in the shell and divides the working cavity into a first cavity and a second cavity, the material distributor is provided with a plurality of groups of liquid distribution channels which are concentrically arranged, the liquid distribution channels in the same group are arranged at intervals in the circumferential direction, and each liquid distribution channel penetrates through the material distributor in the axial direction; the bubble cutter is provided with a feeding end and a discharging end, the feeding end is attached to the material distributor, the bubble cutter is provided with a plurality of sets of bubble cutting channels which are concentrically arranged, the bubble cutting channels in the same set are arranged at intervals in the circumferential direction, and each bubble cutting channel extends to the discharging end from the feeding end; the end face of the feeding end is provided with an annular distribution groove in butt joint with the liquid distribution channel and a communicating groove connecting the distribution groove and the bubble cutting channels. The bubble generating device provided by the invention can generate high-concentration, stable and uniform nano-bubble mixed liquid.

Description

Technical Field

[0001] The present application relates to the field of nano-foaming technology, and in particular to a bubble generating device and a nano-bubble generating system. Background Art

[0002] Nanobubbles generally refer to bubbles with a diameter of less than 1 μm. Nanobubbles can be widely used in agriculture, animal husbandry, and ecological environment restoration and management because of their long existence and strong oxidation properties.

[0003] At present, most existing bubble generating devices use the principle of gas dissolution to prepare bubbles. The prepared bubbles are generally micron-sized. Micron bubbles disappear quickly in water bodies and have a short residence time. They need to work continuously to ensure the required bubble concentration. The operating cost is high, and the oxidation characteristics of micron bubbles are weak, which limits their use in the field of ecological environment restoration. A few bubble generating devices based on the principle of decompression and shearing have problems with insufficient gas-liquid mixing, resulting in extremely unstable bubble size and bubble concentration. Summary of the invention

[0004] In view of the problems in the prior art, the present application provides a bubble generating device and an ultrafine bubble generating system, which can efficiently generate stable and uniform nanobubbles.

[0005] The bubble generating device provided in the present application comprises:

[0006] The shell has a feed inlet and a discharge outlet, and the interior is a working chamber;

[0007] A material distributor is located in the shell and divides the working chamber into a first chamber connected to the feed port and a second chamber connected to the discharge port. The material distributor is provided with a plurality of groups of liquid distribution channels arranged concentrically. The liquid distribution channels in the same group are arranged at intervals along the circumferential direction, and each liquid distribution channel penetrates the material distributor along the axial direction.

[0008] A bubble cutter is arranged in the second chamber, and has a feed end and a discharge end. The feed end is in contact with the material distributor. The bubble cutter has a plurality of concentrically arranged groups of bubble cutting channels. The bubble cutting channels in the same group are arranged at intervals along the circumferential direction. Each bubble cutting channel extends from the feed end to the discharge end. The end face of the feed end is provided with an annular distribution groove docking with the liquid distribution channel and a connecting groove connecting the distribution groove and each bubble cutting channel.

[0009] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0010] Optionally, each distribution groove corresponds to two adjacent groups of bubble cutting channels and is arranged in a region between the two groups of bubble cutting channels.

[0011] Optionally, the distribution groove is connected to two adjacent groups of bubble cutting channels through a first connecting groove and a second connecting groove respectively.

[0012] Optionally, the connecting groove is an Archimedean spiral groove, and the spiral directions of the first connecting groove and the second connecting groove are opposite.

[0013] Optionally, the liquid distribution channels are arranged in concentric circles, and their cross-sections are arc structures.

[0014] Optionally, the bubble cutting channel includes a compression section with a gradually decreasing pore size and a release section located at the rear end of the compression section with a gradually increasing pore size.

[0015] Optionally, the material distributor is fixed concentrically with the bubble cutter.

[0016] Optionally, the shell includes an upper cover and a lower cover, the upper cover and the lower cover are fixedly connected via a flange, the upper cover has a feed inlet, and the lower cover has a discharge outlet.

[0017] The present application also provides a nano bubble generating system, comprising the bubble generating device.

[0018] Optionally, the nano bubble generating system comprises a gas-liquid mixing pump, a vortex generating device and the bubble generating device connected in sequence, and the vortex generating device comprises:

[0019] The cylinder has a fluid inlet and a fluid outlet, and the interior is a fluid channel.

[0020] A vortex generator is built into the cylinder, and the vortex generator is composed of a plurality of spiral blades arranged continuously from the fluid inlet to the fluid outlet, each spiral blade has a twisted streamlined surface, the twisting directions of two adjacent spiral blades are opposite, and the two are connected in head-to-tail rotation.

[0021] Compared with the prior art, the bubble generating device of the present application can generate a stable and uniform nano bubble mixed liquid through the cooperation of a material distributor and a bubble cutter. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a bubble generating device in one embodiment;

[0023] Figure 2 is a cross-sectional view of a bubble generating device in one embodiment;

[0024] Figure 3is a cross-sectional view of a bubble cutting channel in one embodiment;

[0025] Figure 4 This is a schematic diagram of the coordination of a material distributor, a sealing gasket and a bubble cutter in one embodiment;

[0026] Figure 5 A partial schematic diagram of a bubble generating device in one embodiment;

[0027] Figure 6 Another partial schematic diagram of a bubble generating device in one embodiment;

[0028] Figure 7 This is a schematic diagram of the structure of a material distributor in one embodiment;

[0029] Figure 8 This is a schematic structural diagram of a bubble cutter in one embodiment;

[0030] Fig. 9 This is a schematic structural diagram of a nano bubble generating system in one embodiment;

[0031] Fig.10 4 is a cross-sectional view of a vortex generating device in one embodiment.

[0032] The reference numerals in the figures are described as follows:

[0033] 100. Gas-liquid mixing pump;

[0034] 200, vortex generating device; 210, cylinder; 211, fluid inlet; 212, fluid outlet; 213, fluid channel; 214, end cover; 220, vortex generator; 221, spiral blade;

[0035] 300, bubble generating device; 310, shell; 311, feed port; 312, discharge port; 313, first chamber; 314, second chamber; 315, upper cover; 316, lower cover; 317, first flange; 318, second flange; 320, material distributor; 321, liquid distribution channel; 322, first connecting hole; 323, third connecting hole; 330, bubble cutter; 331, feed end; 332, discharge end; 333, bubble cutting channel; 3331, compression section; 3332, throat section; 3333, release section; 334, distribution groove; 335, connecting groove; 3351, first connecting groove; 3352, second connecting groove; 336, second connecting hole; 337, fourth connecting hole; 340, sealing gasket. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be a central component at the same time.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0039] See also Figures 1 to 8 In the illustrated embodiment, the present application provides a bubble generating device 300, comprising a shell 310, a material distributor 320 and a bubble cutter 330; wherein the shell 310 has a feed port 311 and a discharge port 312, and the interior is a working chamber; the material distributor 320 is located in the shell 310, and divides the working chamber into a first chamber 313 and a second chamber 314, the first chamber 313 is connected to the feed port 311, and the second chamber 314 is connected to the discharge port 312, and the material distributor 320 is provided with a plurality of groups of liquid distribution channels 321 arranged concentrically, and the liquid distribution channels 321 of the same group are arranged at intervals along the circumferential direction, and each liquid distribution channel 321 is axially traversed. The material distributor 320 is connected; the bubble cutter 330 is arranged in the second chamber 314, and has a feed end 331 and a discharge end 332. The bubble cutting channel 333 has a plurality of groups of bubble cutting channels 333 arranged concentrically, and the bubble cutting channels 333 of the same group are arranged at intervals along the circumferential direction. Each bubble cutting channel 333 extends from the feed end 331 to the discharge end 332, wherein the end surface of the feed end 331 is provided with an annular distribution groove 334 and a connecting groove 335 connecting the distribution groove 334 and each bubble cutting channel 333. In the assembled state, the feed end 331 is close to the material distributor 320, and the distribution groove 334 is connected to the liquid distribution channel 321. In this embodiment, the material distributor 320 can evenly divert the gas-liquid mixture, and then produce a high-concentration, stable and uniform nano bubble mixture through the bubble cutter 330.

[0040] To ensure the material distribution effect, the material distributor 320 is provided with 2 to 4 groups of liquid distribution channels 321 arranged concentrically, and each group contains 4 to 8 liquid distribution channels 321, for example, see Figure 7 In the embodiment, the material distributor 320 is provided with two groups of liquid distribution channels 321 arranged concentrically, and the number of liquid distribution channels 321 in different groups is the same, and each group contains 6 liquid distribution channels 321. The liquid distribution channels 321 are arranged in concentric circles, and their cross sections are arc structures with a diameter of 10 to 15 mm.

[0041] See also Figure 8 In the illustrated embodiment, each distribution groove 334 corresponds to two adjacent groups of bubble cutting channels 333, and is disposed in the area between the two groups of bubble cutting channels 333. Further, the distribution groove 334 is connected to the two adjacent groups of bubble cutting channels 333 through the connecting groove 335 and the second connecting groove 3352, respectively. After the gas-liquid mixture of a certain pressure enters the distribution groove 334, it can continuously rotate along its inner peripheral wall, and be diverted to each bubble cutting channel 333 through the connecting groove 335, thereby achieving further uniform diversion.

[0042] The connecting groove 335 is an Archimedean spiral groove, and the spiral directions of the first connecting groove 3351 and the second connecting groove 3352 are opposite. The diameter of the distribution groove 334 is 10-15 mm, and the diameter of each connecting groove is 2-5 mm. Compared with the distribution groove 334, the diameter of the connecting groove 335 is greatly reduced, so that the initial flow rate of the gas-liquid mixture entering the bubble cutting channel 333 is increased.

[0043] See also Figure 3 In the illustrated embodiment, the bubble cutting channel 333 is a Venturi structure as a whole, including a compression section 3331 with a gradually decreasing aperture and a release section 3333 located at the rear end of the compression section 3331 and with a gradually increasing aperture. Further, the bubble cutting channel 333 also includes a throat section 3332 located between the compression section 3331 and the release section 3333, and the aperture of the throat section 3332 remains unchanged along the extension direction. The aperture of the compression section 3331 can be 3 to 12 mm, the aperture of the throat section 3332 can be 1 to 6 mm, and the aperture of the release section 3333 can be 3 to 12 mm.

[0044] When the gas-liquid mixture containing micron bubbles enters the compression section 3331, the gas-liquid mixture swirls forward continuously. Due to the difference in specific gravity between the liquid and the gas, the liquid is acted upon by centrifugal force and the gas is acted upon by centripetal force. Therefore, the bubbles are concentrated on the central axis of the compression section 3331, and the liquid is mainly concentrated on both sides of the compression section 3331. As the aperture of the compression section 3331 gradually decreases, the acceleration of the liquid increases continuously, and the bubbles in the middle are continuously squeezed, causing the bubbles to deform and violent collisions between the bubbles. The gas-liquid mixture in the compression section is further accelerated in the throat section 3332, and then enters the release section 3333 and continues to be accelerated, reaching supersonic flow, until the pressure at the outlet of the expansion section is instantly released, and the high-speed liquids on both sides impact and shear the bubbles in the middle, stably producing a high-concentration nanobubble mixed liquid.

[0045] See also Figures 5 to 8 In the illustrated embodiment, the material distributor 320 and the bubble cutter 330 are fixed concentrically. Specifically, a first connection hole 322 is provided at the center of the material distributor 320, a second connection hole 336 is provided at the center of the bubble cutter 330, and the material distributor 320 and the bubble cutter 330 are connected and fixed by fasteners. Furthermore, a third connection hole 323 and a fourth connection hole 337 are provided at the edges of the material distributor 320 and the bubble cutter 330, respectively, and are fixedly connected by fasteners.

[0046] To prevent the gas-liquid mixture from overflowing, an annular sealing gasket 340 is provided between the material distributor 320 and the bubble cutter 330. Specifically, the liquid distribution channel 321 is provided in the middle area of ​​the material distributor 320, the bubble cutting channel 333 is provided in the middle area of ​​the bubble cutter 330, and the sealing gasket 340 is laid on the edge area of ​​the end surface of the feed end 331.

[0047] During assembly, the material distributor 320 and the bubble cutter 330 are pre-connected as a component and then placed in the housing 310, and at least the material distributor 320 and the inner wall of the housing 310 are tightly engaged through interference fit to prevent the gas-liquid mixture from spilling from the edge. Furthermore, a limiting step can be set on the inner wall of the housing 310 to limit the position of the component.

[0048] To facilitate assembly, the shell 310 includes an upper cover 315 and a lower cover 316 fixedly connected by a flange, wherein the upper cover 315 has a feed port 311 and a first flange 317, the lower cover 316 has a feed port 312 and a second flange 318, and the inner wall of the lower cover 316 is provided with a limiting step that cooperates with the bubble cutter 330.

[0049] The bubble generating device 300 of the present application can convert a gas-liquid mixture containing micron bubbles into a gas-liquid mixture containing nano bubbles, and can be used as a core component of a nano bubble generating system and applied in ecological environment restoration and management.

[0050] See Fig. 9 , 10 , an embodiment of the present application provides a nano bubble generating system, comprising a gas-liquid mixing pump 100, a vortex generating device 200 and the above-mentioned bubble generating device 300 connected in sequence. Among them, the vortex generator 220 comprises a cylinder 210 and a vortex generator 220 built in the cylinder 210, the cylinder 210 has a fluid inlet 211 and a fluid outlet 212, and a fluid channel 213 inside; the vortex generator 220 is composed of a plurality of spiral blades 221 arranged continuously along the fluid channel 213, each spiral blade 221 has a twisted streamlined surface, and the twisting directions of two adjacent spiral blades 221 are opposite and the two are rotated head to tail.

[0051] In addition, both ends of the cylinder 210 are provided with end caps 214 for sealing, and both ends of the vortex generator 220 are respectively welded and fixed to the end caps 214, and the two adjacent spiral blades 221 are rotated 90° head to tail and fixed by welding at the center of the end surface. The vortex generator 220 can freely control the flow of the liquid passing through it, and can realize the following three mixing principles:

[0052] (1) Splitting function: The fluid is divided into two parts by a plurality of spiral blades 221. n The division is performed by the following division method:

[0053] (2) Conversion effect: The direction of liquid flow is along the streamlined surface of the twisted blade, which will generate a flow rotating in the axial direction. Through this flow, not only the liquid flow in the center of the pipe is pushed to the periphery, but also the peripheral fluid is pushed to the center of the pipe, forming a rotational motion in the semicircular part divided by the blade;

[0054] (3) Reversal effect: The twisting direction of two adjacent spiral blades 221 causes the fluid to be stirred and produce a high-speed vortex with violent collisions. At this time, the gas-liquid mixture is further fully mixed and the bubbles are refined, thus producing micro-nano bubbles.

[0055] The vortex generating device 200 of the present application forms a mixed energy through the resistance of the liquid passing through, that is, through the pressure loss, and compared with the traditional dynamic mixing method, it saves the time and total energy required to achieve mixing. The gas-liquid mixture treated by the vortex generating device 200 immediately passes through the nano bubble generating device 300 to generate a stable and uniform nano bubble mixed liquid, the diameter of these nano bubbles is 80 to 220nm, and the volume content accounts for more than 90% of the total volume of all bubbles.

[0056] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. When the technical features in different embodiments are embodied in the same figure, it can be regarded that the figure also discloses the combination examples of the various embodiments involved.

[0057] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A bubble generating device, characterized in that: include: The shell has a feed inlet and a discharge outlet, and the interior is a working chamber; A material distributor is located in the shell and divides the working chamber into a first chamber connected to the feed port and a second chamber connected to the discharge port. The material distributor is provided with a plurality of groups of liquid distribution channels arranged concentrically. The liquid distribution channels in the same group are arranged at intervals along the circumferential direction, and each liquid distribution channel penetrates the material distributor along the axial direction. A bubble cutter is arranged in the second chamber, and has a feed end and a discharge end. The feed end is in contact with the material distributor. The bubble cutter has a plurality of concentrically arranged groups of bubble cutting channels. The bubble cutting channels in the same group are arranged at intervals along the circumferential direction. Each bubble cutting channel extends from the feed end to the discharge end. The end face of the feed end is provided with an annular distribution groove docking with the liquid distribution channel and a connecting groove connecting the distribution groove and each bubble cutting channel.

2. The bubble generating device according to claim 1, characterized in that: Each distribution groove corresponds to two adjacent groups of bubble cutting channels and is arranged in the area between the two groups of bubble cutting channels.

3. The bubble generating device according to claim 2, characterized in that: The distribution groove is connected with two adjacent groups of bubble cutting channels through a first connecting groove and a second connecting groove respectively.

4. The bubble generating device according to claim 3, characterized in that: The connecting groove is an Archimedean spiral groove, and the spiral directions of the first connecting groove and the second connecting groove are opposite.

5. The bubble generating device according to claim 1, characterized in that: The liquid distribution channels are arranged in concentric circles, and their cross sections are arc structures.

6. The bubble generating device according to claim 1, characterized in that: The bubble cutting channel comprises a compression section with a gradually decreasing aperture and a release section located at the rear end of the compression section with a gradually increasing aperture.

7. The bubble generating device according to claim 1, characterized in that: The material distributor is fixed concentrically with the bubble cutter.

8. The bubble generating device according to claim 1, characterized in that: The shell comprises an upper cover and a lower cover, wherein the upper cover and the lower cover are fixedly connected via a flange, the upper cover is provided with a material inlet, and the lower cover is provided with a material outlet.

9. A nanobubble generating system, characterized in that: The invention comprises the bubble generating device as described in any one of claims 1 to 8.

10. The nanobubble generating system according to claim 9, characterized in that: It comprises a gas-liquid mixing pump, a vortex generating device and the bubble generating device connected in sequence, wherein the vortex generating device comprises: The cylinder has a fluid inlet and a fluid outlet, and the interior is a fluid channel. A vortex generator is built into the cylinder. The vortex generator is composed of a plurality of spiral blades arranged continuously along the fluid channel. Each spiral blade has a twisted streamlined surface. The twisting directions of two adjacent spiral blades are opposite and the two are connected in head-to-tail rotation.

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