Super-gravity nano-micro bubble generating device for large-circulation-volume reaction system and application of super-gravity nano-micro bubble generating device

Abstract

The invention discloses a super-gravity nano-micro bubble generating device for a large-circulation-volume reaction system and application. The super-gravity nano-micro bubble generating device comprises a rack, a motor, a coupler, a rotating shaft, a rotor, a gas-liquid inlet, a super-gravity outlet liquid distributor, a circulation liquid phase inlet and a gas-liquid outlet. The rack comprises a rack lower part and a rack upper part; a first containing cavity is formed in the lower portion of the rack and used for containing the motor and the coupler. The motor is fixedly connected with the rotor through a coupler and a rotating shaft penetrating through the top of the first containing cavity from bottom to top in sequence. The top end of the lower rack part is fixedly connected with the lower end of the upper rack part in a matched mode, and a hollow second containing cavity is formed in the upper rack part and used for containing a rotor; the device can effectively solve the problems that when a supergravity nano-micro bubble generating device is applied to hydrogenation, oxidation, hydroformylation and other reactions, strong heat release is achieved, and in the circulation process of a large number of materials, the device treatment load is high, and energy consumption is large.

Description

Technical Field

[0001] This invention relates to the technical field of high-gravity rotating beds and their applications. Specifically, it relates to a high-gravity nano-microbubble generator and its application in large-volume reaction systems. Background Technology

[0002] Gas-liquid mixing processes involving poorly soluble gases such as hydrogen, oxygen, and carbon monoxide are widespread in the chemical industry. These processes significantly impact gas-liquid mass transfer, making research into enhanced gas-liquid mass transfer technologies crucial for shortening process flows, reducing equipment size, and lowering investment and operating costs. Taking catalytic hydrogenation as an example, compared to the classic trickle-bed hydrogenation process, liquid-phase hydrogenation eliminates the need for equipment like circulating hydrogen compressors while improving catalyst utilization efficiency, thus significantly reducing energy consumption. Microbubble-based liquid-phase hydrogenation technology can further increase the hydrogen carrying capacity in the liquid phase, effectively contributing to the high-quality development of chemical processes such as catalytic hydrogenation by improving reaction efficiency.

[0003] Hypergravity technology, with rotating beds as its core equipment, is one of the effective technologies for enhancing gas-liquid mass transfer processes. In recent years, hypergravity technology has been gradually applied to the field of microbubble generators. By driving a rotor loaded with nano- and micro-structured packing materials to rotate at high speed through a motor, macroscopic large bubbles are dispersed into nano- and micro-bubbles, which greatly enhances the gas-liquid mass transfer process.

[0004] For example, Chinese patent application 201910163989.0 discloses a supergravity nano-microbubble generating device and reaction system, which overcomes the problem of discontinuous liquid phase in traditional supergravity devices, making it impossible to form a liquid phase containing nano-microbubbles, and also overcomes the problem of nano-microbubble aggregation on the surface of static microporous media.

[0005] For example, Chinese patent application 202210372532.2 discloses a supergravity gas mixing device for step-by-step cutting of bubbles and its application. On the one hand, the bubble size can be effectively controlled by adjusting the rotation speed of the supergravity device. On the other hand, it assists in multi-stage gas replenishment. At the same time, through the synergistic effect of multi-stage rotors loaded with hydrophilic / hydrophobic bubble breaking parts of different pore sizes, step-by-step cutting of bubbles is achieved, resulting in smaller bubble size and more uniform bubble size distribution.

[0006] While the aforementioned patent applications, when applied to hydrogenation, oxidation, and other reaction processes, can improve reaction rates and reduce reactor volume by enhancing gas-liquid mass transfer, they fail to consider that most hydrogenation and oxidation reactions are strongly exothermic (exothermic heat > 200 kJ / mol). Industrially, heat balance is often maintained by circulating large quantities of material for heat transfer (circulated material / fresh material (circulation ratio) > 10). This raises the question of whether the circulating material should enter the hypergravity device along with the fresh material: 1) If all the circulating material enters the hypergravity device, taking a circulation ratio of 10 as an example, for a 10,000-ton / year plant, the actual processing capacity of the hypergravity device would be 110,000 tons / year, undoubtedly increasing system energy consumption. This is even more challenging for plants with a capacity of 100,000 tons / year or more (hypergravity device processing capacity > 1 million tons / year); 2) If the circulating material enters the reactor directly through pipelines without passing through the hypergravity device, will this circulating material affect the dispersion state of the well-mixed gas-liquid fresh material at the outlet of the hypergravity device and its flow within the reactor? This problem is a common issue in the application of nano- and micro-bubble generators, such as those used in hypergravity reactions. Currently, no relevant patents have been found that address the aforementioned problems in strongly exothermic, high-volume reaction systems such as hydrogenation and oxidation, and provide rational designs for related nano- and micro-bubble generators.

[0007] Therefore, developing a supergravity nano-microbubble generator for large-volume reaction systems can significantly improve the problem of increased energy consumption caused by the exponential increase in the processing capacity of supergravity nano-microbubble generators in large-volume systems, while ensuring that the quality of the bubbles generated by the supergravity nano-microbubble generator and the internal flow meet the requirements. This has important practical application value for further expanding the application scenarios of supergravity and other nano-microbubble generators, serving the chemical industry to improve the "three highs" problems of high energy consumption, high material consumption, and high pollution, and achieving the national "energy conservation and emission reduction" goals. Summary of the Invention

[0008] The first technical problem this invention aims to solve is to provide a supergravity nano-microbubble generator for large-volume reaction systems. In this device, fresh gaseous and liquid materials enter the supergravity nano-microbubble generator through a gas-liquid inlet. The gas phase is cut into nano-microbubbles by a rotor loaded with hydrophilic and hydrophobic nanostructured packing material at high speed. Part or all of the circulating heat exchange liquid phase enters the supergravity outlet liquid distributor through a circulating liquid phase inlet. Through the cooperation of the circulating liquid phase inlet and the guide components, the fresh liquid phase containing nano-microbubbles dispersed by the rotor can be uniformly mixed with the circulating liquid phase. The nano-microbubbles can then uniformly enter the subsequent reaction system from the gas-liquid outlet. Simultaneously, the flow state after the mixture of the fresh liquid phase containing nano-microbubbles and the circulating liquid phase meets the requirements. This design effectively overcomes the problems of high processing load and high energy consumption inherent in supergravity nano-microbubble generators used in reactions such as hydrogenation, oxidation, and hydroformylation, which are strongly exothermic and involve large-volume material circulation.

[0009] The second technical problem to be solved by the present invention is to provide an application of a supergravity nano-microbubble generator in a large-volume reaction system.

[0010] To solve the first technical problem mentioned above, the present invention adopts the following technical solution:

[0011] A supergravity nano-microbubble generator for a large-volume reaction system includes a frame, a motor, a coupling, a rotating shaft, a rotor, a gas-liquid inlet, a supergravity outlet liquid distributor, a circulating liquid phase inlet, and a gas-liquid outlet.

[0012] The frame includes a lower frame and an upper frame;

[0013] The lower part of the frame is provided with a first receiving cavity for accommodating the motor and coupling;

[0014] The motor is fixedly connected to the rotor from bottom to top via a coupling and a rotating shaft passing through the top of the first receiving cavity;

[0015] The top end of the lower part of the frame and the bottom end of the upper part of the frame are matched and fixedly connected. A hollow second receiving cavity is formed in the upper part of the frame to accommodate the rotor.

[0016] The gas-liquid inlet is located on the upper part of the frame and is connected to the lower part of the second receiving cavity;

[0017] The supergravity outlet liquid distributor includes a lower cylindrical section and an upper conical section; the cylindrical section is fixedly connected to the top of the upper part of the frame;

[0018] A circulating liquid inlet is provided on the vertebral body.

[0019] Preferably, the gas-liquid inlet of the second accommodating cavity is provided with a dispersion structure, including but not limited to a perforated distribution ring and a metal sintering ring.

[0020] Preferably, there are 1-6 gas-liquid inlets, more preferably 2-4; each gas-liquid inlet is arranged horizontally at equal intervals on the outer wall of the lower part of the frame.

[0021] Preferably, the rotor is loaded with nano-microstructured fillers with hydrophilic and hydrophobic surface modifications; more preferably, the rotor is loaded with nano-microstructured fillers with hydrophilic surface modifications.

[0022] Preferably, the ratio of the inner diameter of the cylindrical part of the supergravity outlet liquid distributor to the outer diameter of the rotor is 1:2-8, and more preferably, 1:3-5.

[0023] Preferably, there are 1-6 circulating liquid inlets, more preferably 2-4; and the circulating liquid inlets are arranged horizontally and evenly in a ring on the outer wall of the vertebral body.

[0024] Preferably, a flow guide is provided on the inner wall of the vertebral body; the flow guide includes, but is not limited to, a porous flat plate, a porous fan-shaped plate, etc.

[0025] Preferably, there are 4-6 flow guides, evenly distributed on the inner wall of the cone body; the flow guides include, but are not limited to, porous flat plates and porous fan-shaped plates, with holes of 3-10 mm in size on the plates and an opening rate of 20-80%; more preferably, the flow guides are porous flat plates, with holes of 5-10 mm in size on the plates and an opening rate of 10-50%.

[0026] Preferably, the ratio of the gas-liquid outlet size to the subsequent reactor size is 1:1 to 1:5, and more preferably 1:1.

[0027] To solve the second technical problem mentioned above, the present invention adopts the following technical solution:

[0028] Application of a supergravity nanobubble generator in a large-volume reaction system

[0029] Preferably, the application includes, but is not limited to, processes that are strongly exothermic, such as hydrogenation, oxidation, and hydroformylation, which require material circulation for heat exchange and cooling.

[0030] Preferably, a portion of the circulating liquid phase and fresh material enter the supergravity nano-microbubble generator, and the remaining circulating liquid phase enters the supergravity outlet liquid distributor through the circulating liquid phase inlet. The ratio of the liquid flow rate at the gas-liquid inlet to the liquid flow rate at the circulating liquid phase inlet is 1:1 to 1:4.

[0031] Any range described in this invention includes the endpoint, any value between the endpoints, and any subrange consisting of the endpoint or any value between the endpoints.

[0032] Unless otherwise specified, all raw materials used in this invention can be obtained commercially, and the equipment used in this invention can be conventional equipment in the relevant field or refer to existing technology in the relevant field.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The supergravity nano-microbubble generator of this invention is mainly applied to large-volume reaction systems, especially for highly exothermic processes such as hydrogenation, oxidation, and hydroformylation that require large circulation volumes. By rationally distributing the circulating liquid phase to the gas-liquid inlet and the supergravity outlet liquid distributor, and further combining this with the design of the internal structure of the supergravity outlet liquid distributor, the problems of large processing capacity and high energy consumption that exist in the application of supergravity nano-microbubble generators in related fields are effectively solved.

[0035] 2. Through the rational design of the circulating liquid phase inlet on the outer wall and the flow guide on the inner wall of the supergravity outlet liquid distributor, the mixing process of the liquid phase carrying a large number of nano- and micro-bubbles after rotor mixing and the circulating liquid phase is optimized. Simultaneously, the energy carried by the circulating liquid phase and the structure of the supergravity outlet liquid distributor enhance the overall turbulence of the liquid, which can, to some extent, prevent the large-scale aggregation of nano- and micro-bubbles in the liquid phase after rotor mixing, ensuring that the nano- and micro-bubble swarms still enter the subsequent reaction system with a relatively good size and distribution. Furthermore, the relevant structural design considers the flow behavior of the gas and liquid phases. Previously disclosed patents on supergravity nano- and micro-bubble generators often fail to ensure consistency between the outlet size and the inlet size of the reaction system in actual industrial applications, typically involving a diameter expansion process. This leads to uneven flow and flow deviation problems in the liquid phase nano- and micro-bubble swarms during the diameter expansion process. By matching the dimensions of the supergravity outlet liquid distributor with the rotor side and with the subsequent reaction system side, the fluid flow behavior can be effectively improved. Attached Figure Description

[0036] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] Figure 1 This is a schematic diagram of the structure of the supergravity nano-microbubble generator for a large-volume reaction system according to the present invention;

[0038] Figure 2 This is a three-dimensional schematic diagram of the supergravity outlet liquid distributor in this invention;

[0039] Figure 3 This is a side view of the supergravity outlet liquid distributor in this invention;

[0040] Figure 4 This is a top view of the supergravity outlet liquid distributor in this invention;

[0041] Figure 5 This is a schematic diagram of the liquid-phase hydrogenation reaction system in Example 1 of the present invention;

[0042] Figure 6 This is a schematic diagram of the liquid-phase hydrogenation reaction system in Embodiment 2 of the present invention;

[0043] Figure 7 This is a schematic diagram of the liquid-phase hydrogenation reaction system in Example 3 of the present invention. Detailed Implementation

[0044] To more clearly illustrate the present invention, the following description, in conjunction with preferred embodiments and accompanying drawings, further explains the invention. Similar components in the drawings are indicated by the same reference numerals. Those skilled in the art should understand that the specific description below is illustrative rather than restrictive and should not be construed as limiting the scope of protection of the present invention.

[0045] For ease of description, the terms "first," "second," etc., used in this invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this invention.

[0046] See Figure 1 As shown, as one aspect of the present invention, a supergravity nano-microbubble generator 100 for a large-volume reaction system includes a frame 1, a motor 2, a coupling 3, a rotating shaft 4, a rotor 5, a gas-liquid inlet 6, a supergravity outlet liquid distributor 7, a circulating liquid phase inlet 8, and a gas-liquid outlet 9.

[0047] The frame 1 includes a lower frame 11 and an upper frame 12;

[0048] The lower part 1 of the frame is provided with a first receiving cavity 13 for accommodating the motor 1 and the coupling 2;

[0049] The motor 2 is fixedly connected to the rotor 5 from bottom to top via a coupling 3 and a rotating shaft 4 passing through the top of the first receiving cavity 13; the motor 2 provides power to the rotating component rotor 5 inside the equipment, and the rotating shaft 4 converts the kinetic energy of the motor 2 into the mechanical energy of the rotor 5, driving the rotor 5 to rotate at high speed.

[0050] The top end of the lower part 11 of the frame and the lower end of the upper part 12 of the frame are matched and fixedly connected. A hollow second receiving cavity 14 is formed in the upper part 12 of the frame to receive the rotor 5.

[0051] The gas-liquid inlet 6 is located on the upper part 12 of the frame and is connected to the lower part of the second receiving cavity 14; so as to ensure that the overall flow direction of gas and liquid in the second receiving cavity 14 is from bottom to top.

[0052] The supergravity outlet liquid distributor 7 includes a lower cylindrical part 71 and an upper conical part 72; the cylindrical part 71 is fixedly connected to the top of the upper part 12 of the frame;

[0053] A circulating liquid inlet 8 is provided on the vertebral body 72;

[0054] The gas-liquid outlet 9 is directly and fixedly connected to the subsequent reactor, and the liquid containing nano-micro bubbles directly enters the downstream use system through the gas-liquid outlet 9.

[0055] In some embodiments of the present invention, the gas-liquid inlet of the second accommodating cavity 14 is provided with a dispersion structure, including but not limited to a perforated distribution ring and a metal sintering ring, for better dispersion of gas and liquid.

[0056] In some embodiments of the present invention, there are 1 to 6 gas-liquid inlets 6, preferably 2 to 4; each gas-liquid inlet 6 is arranged horizontally at equal distances on the outer wall of the lower part 11 of the frame, which can reduce the risk of gas-liquid channeling and ensure uniform initial dispersion of gas and liquid as much as possible.

[0057] In some embodiments of the present invention, the rotor 5 is loaded with hydrophilic and hydrophobic surface modified nano-microstructure fillers; more preferably, the rotor is loaded with hydrophilic surface modified nano-microstructure fillers; including but not limited to stainless steel wire mesh, nickel foam, silicon carbide, etc.

[0058] In some embodiments of the present invention, the ratio of the inner diameter of the cylindrical portion 71 of the supergravity outlet liquid distributor 7 to the outer diameter of the rotor 5 is 1:2-8, preferably 1:3-5; the purpose is to reduce the aggregation of nanobubbles during the transport process.

[0059] See Figures 2-4 As shown, in some embodiments of the present invention, there are 1-6 circulating liquid inlets 8, preferably 2-4; and the circulating liquid inlets 8 are arranged horizontally and evenly in a ring on the outer wall of the cone portion 72.

[0060] See Figure 2 As shown, in some embodiments of the present invention, a flow guide 721 is provided on the inner wall of the cone portion 72 for dispersing part or all of the circulating liquid phase; the flow guide 721 includes, but is not limited to, a porous plate, a porous fan-shaped plate, etc.

[0061] See Figure 2As shown, in some embodiments of the present invention, the flow guide 721 is provided in 4-6 parts, evenly distributed on the inner wall surface of the cone portion 72; the flow guide 721 includes, but is not limited to, a porous plate or a porous fan-shaped plate, with holes 722 of 3-10 mm in size on the plate, and an opening rate of 20-80%; the purpose is to increase the turbulence of the liquid, make full use of the kinetic energy of the circulating liquid phase, and reduce the aggregation of nano-micro bubbles; more preferably, the flow guide 721 is a porous plate, with holes of 5-10 mm in size on the plate, and an opening rate of 10-50%.

[0062] In some embodiments of the present invention, the ratio of the size of the gas-liquid outlet 9 to the size of the subsequent reactor is 1:1 to 1:5, preferably 1:1.

[0063] The working principle of the supergravity nano-microbubble generator of this invention is as follows: When the supergravity nano-microbubble generator is applied to hydrogenation, oxidation and other reaction processes, although it can improve the reaction rate and reduce the reactor volume by enhancing the gas-liquid mass transfer process, it does not take into account that most hydrogenation, oxidation and other reactions are strongly exothermic processes (heat release > 200 kJ / mol). In industry, the heat balance of the system is often ensured by circulating a large amount of material for heat transfer (circulated material / fresh material (circulation ratio) > 10). The ensuing question is whether the recycled material needs to enter the hypergravity device together with the fresh material: (1) If all the recycled material enters the hypergravity device, taking a recycling ratio of 10 as an example, for a 10,000-ton / year device, the actual processing capacity of the hypergravity device is 110,000 tons / year, which undoubtedly increases the system's energy consumption. At the same time, it is even more difficult to apply to devices with a capacity of 100,000 tons / year or more (hypergravity device processing capacity > 1 million tons / year); (2) If the recycled material enters the reactor directly through the pipeline without passing through the hypergravity device, will this part of the recycled material affect the dispersion state of the well-mixed gas-liquid fresh material at the outlet of the hypergravity device and its flow inside the reactor? This problem is a common problem in the application of hypergravity and other nano-microbubble generators. At present, no relevant patents have been found to rationalize the design of related nano-microbubble generators for the above-mentioned problems existing in hydrogenation, oxidation and other strongly exothermic, large-volume reaction systems. Therefore, developing a supergravity nano-microbubble generator for large-volume reaction systems can significantly improve the problem of increased energy consumption caused by the exponential increase in the processing capacity of supergravity nano-microbubble generators in large-volume systems, while ensuring that the quality of the bubbles generated by the supergravity nano-microbubble generator and the internal flow meet the requirements. This has important practical application value for further expanding the application scenarios of supergravity and other nano-microbubble generators, serving the chemical industry to improve the "three highs" problems of high energy consumption, high material consumption, and high pollution, and achieving the national "energy conservation and emission reduction" goals.

[0064] As another aspect of the present invention, the application of a supergravity nanobubble generator in a large-volume reaction system is described.

[0065] In some embodiments of the present invention, the applications include, but are not limited to, processes that are strongly exothermic, such as hydrogenation, oxidation, and hydroformylation, which require material circulation for heat exchange and cooling.

[0066] In some embodiments of the present invention, a portion of the circulating liquid phase and fresh material enter the supergravity nano-microbubble generator, and the remaining circulating liquid phase enters the supergravity outlet liquid distributor through the circulating liquid phase inlet. The ratio of the liquid flow rate of the gas-liquid inlet to the liquid flow rate of the circulating liquid phase inlet is 1:1 to 1:4.

[0067] Example 1

[0068] See Figure 5 The diagram shown is a schematic of the application of the supergravity nano-microbubble generator of the present invention to a large-volume reaction system. Figure 5 The reaction system includes a raw material tank 101, a feed pump 102, a supergravity nano-microbubble generator 100, a fixed bed reactor 103, a gas-liquid separator 104, a circulating heat exchanger 105, a circulating storage tank 106, and a circulating pump 107.

[0069] A kind of utilization Figure 3 The reaction system shown undergoes a large-cycle hydrogenation reaction of 1,4-butynediol, including the following steps:

[0070] 1) First, add 40% by mass of 1,4-butynediol reaction solution to the raw material tank, pack 29 kg of catalyst in the fixed bed, purge the entire system with nitrogen, then purge the system with hydrogen and maintain pressure to activate the catalyst.

[0071] 2) Liquid phase is introduced into the supergravity nano-microbubble generator via a feed pump at a flow rate of 16.7 kg / h to establish a liquid phase circulation throughout the system. Simultaneously, reactive gaseous hydrogen is introduced into the supergravity nano-microbubble generator at a flow rate of 21.7 Nm³. 3 / h;

[0072] 3) Start the supergravity nano-microbubble generator, and gradually increase the temperature to the reaction temperature of 95°C through pipeline heating and fixed bed reactor furnace system, while simultaneously increasing the hydrogen pressure to the reaction pressure of 29MPa.

[0073] 4) The circulation pump's circulation rate is approximately 280 kg / h, and the outlet temperature of the circulating heat exchanger is approximately 90℃. The bed reaction temperature is stabilized by adjusting the circulation pump's circulation rate. The flow rate of the circulating liquid phase entering the fresh material pipeline and the flow rate of the supergravity outlet liquid distributor are adjusted to minimize the flow rate entering the fresh material pipeline while ensuring product quality, thereby obtaining a better circulating material distribution ratio.

[0074] 5) After the sampling results of the reorganization test stabilize, reduce the fresh hydrogen feed rate to obtain the lowest fresh hydrogen feed rate while ensuring product quality.

[0075] 6) Each test group must run stably for 72 hours.

[0076] The relevant results are shown in Table 1 below.

[0077] Example 2

[0078] See Figure 6 As shown, Example 1 is repeated, except that the ultragravity nano-microbubble generator used in the fixed bed reactor in this example is the structure reported in Chinese Patent 202210372532.2, and no ultragravity liquid phase outlet distributor structure is arranged, and all circulating liquid phase enters the fresh material pipeline.

[0079] The relevant results are shown in Table 1 below.

[0080] Example 3

[0081] See Figure 7 As shown, Example 1 is repeated, except that the fixed bed reactor in this example does not use a supergravity nano-microbubble generator for the gas-liquid mixing process.

[0082] The relevant results are shown in Table 1 below.

[0083] Table 1:

[0084]

[0085] As shown in Table 1, the supergravity nano-microbubble generator provided by this invention, applicable to large-volume reaction systems, can be used as a gas-liquid mixing device in processes such as hydrogenation, oxidation, and hydroformylation, where the reaction heat is high and cooling through material circulation is required. By optimizing the structure of the supergravity nano-microbubble generator, a reasonable distribution of circulating materials is achieved. This significantly improves the problem of increased energy consumption caused by the exponential increase in processing capacity under large-volume systems, while ensuring that the quality of the bubbles generated and the internal flow of the supergravity nano-microbubble generator meet the requirements. This has significant practical application value for further expanding the application scenarios of supergravity nano-microbubble generators, serving the chemical industry in addressing the "three highs" problem of high energy consumption, high material consumption, and high pollution, and achieving the national "energy conservation and emission reduction" goals. This equipment has important industrial application significance in processes such as hydrogenation, oxidation, and hydroformylation, where the reaction heat is high and cooling through material circulation is required.

[0086] Of course, the above scenarios are merely illustrative examples. This device can be applied to the removal of solvents, monomers, and low molecular weight polymers from various polymers, including but not limited to organosilicon and polyolefins. These are not exhaustive examples, but it is understood that the substitution of the reaction system based on the concept of this invention, although not necessarily one of the organosilicon or polyolefin devolatilization processes, still falls within the scope defined by this application.

[0087] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is impossible to exhaustively list all embodiments here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A super gravity nanobubble generator for a large circulation volume reaction system, characterized by: The machine frame, motor, coupling, rotating shaft, rotor, gas-liquid inlet, supergravity outlet liquid distributor, circulating liquid phase inlet, gas-liquid outlet; The machine frame includes a lower part and an upper part; The lower part of the machine frame is provided with a first accommodating cavity for accommodating the motor and the coupling; The motor is sequentially fixedly connected with the coupling and the rotor through the rotating shaft passing through the top of the first accommodating cavity from bottom to top; The top end of the lower part of the machine frame and the lower end of the upper part of the machine frame are fixedly connected, and a hollow second accommodating cavity is formed in the upper part of the machine frame for accommodating the rotor; The gas-liquid inlet is arranged on the upper part of the machine frame and communicates with the lower part of the second accommodating cavity; The supergravity outlet liquid distributor includes a cylindrical part at the lower part and a conical part at the upper end; the cylindrical part is fixedly connected with the top end of the upper part of the machine frame; The circulating liquid phase inlet is arranged on the conical part.

2. The supergravity nanobubble generator according to claim 1, wherein: The gas-liquid inlet of the second accommodating cavity is provided with a dispersion structure, including but not limited to a perforated distribution ring and a metal sintered ring.

3. The supergravity nanobubble generator according to claim 1, wherein: The gas-liquid inlet is 1-6, preferably 2-4; each gas-liquid inlet is arranged horizontally and equidistantly on the outer wall of the lower part of the machine frame.

4. The supergravity nanobubble generator according to claim 1, wherein: The rotor is loaded with hydrophilic surface-modified nano-micro structure filler; more preferably, the rotor is loaded with hydrophilic surface-modified nano-micro structure filler.

5. The supergravity nanobubble generator according to claim 1, wherein: The ratio of the inner diameter of the cylindrical part of the supergravity outlet liquid distributor to the outer diameter of the rotor is 1:2-8, preferably 1:3-5.

6. The supergravity nanobubble generator according to claim 1, wherein: The circulating liquid phase inlet is 1-6, preferably 2-4; and the circulating liquid phase inlet is arranged horizontally and uniformly on the outer wall of the conical part.

7. The supergravity nanobubble generator according to claim 1, wherein: The inner wall surface of the conical part is provided with a flow guide; the flow guide includes but is not limited to a perforated flat plate and a perforated fan-shaped plate.

8. The supergravity nanobubble generator according to claim 1, wherein: The flow guide is provided with 4-6, which are uniformly distributed on the inner wall surface of the conical part; the flow guide includes but is not limited to a perforated flat plate and a perforated fan-shaped plate, and the plate is provided with holes with a size of 3-10 mm and a porosity of 20-80%; more preferably, the flow guide adopts a perforated flat plate, and the flat plate is provided with holes with a size of 5-10 mm and a porosity of 10-50%.

9. The supergravity nanobubble generator according to claim 1, wherein: The ratio of the size of the gas-liquid outlet to the size of the subsequent reactor is 1:1-1:5, preferably 1:

1.

10. Application of a supergravity nano-micro bubble generating device in a large circulation quantity reaction system, Preferably, the application includes but is not limited to hydrogenation, oxidation, hydroformylation and other strong exothermic processes requiring material circulation heat exchange cooling; Preferably, part of the circulating liquid phase and fresh material enter the supergravity nano-micro bubble generating device, and the remaining circulating liquid phase enters the supergravity outlet liquid distributor through the circulating liquid phase inlet; the ratio of the liquid flow rate of the gas-liquid inlet to the liquid flow rate of the circulating liquid phase inlet is 1:1-1:4.

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