CN115504529B - High-efficient cavitation broken wall generating device - Google Patents
High-efficient cavitation broken wall generating device Download PDFInfo
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- CN115504529B CN115504529B CN202211200775.4A CN202211200775A CN115504529B CN 115504529 B CN115504529 B CN 115504529B CN 202211200775 A CN202211200775 A CN 202211200775A CN 115504529 B CN115504529 B CN 115504529B
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- 239000007788 liquid Substances 0.000 claims abstract description 137
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 110
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/808—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers driven from the bottom of the receptacle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
- B01F27/906—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms with fixed axis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/26—Reducing the size of particles, liquid droplets or bubbles, e.g. by crushing, grinding, spraying, creation of microbubbles or nanobubbles
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Hydrology & Water Resources (AREA)
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- Water Supply & Treatment (AREA)
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Abstract
The invention discloses a high-efficiency cavitation wall breaking generating device, wherein a cavitation wall breaking device consisting of a nozzle, a nozzle chassis and a movable disk body is arranged in a cavitation wall breaking pool, the middle of the upper surface of the movable disk body is vertically and upwards protruded with a drainage cone extending into a nozzle outlet, three annular grooves along the circumferential direction are formed in the side wall of the drainage cone at intervals from top to bottom, a plurality of identical radial water flow channels are uniformly arranged on the upper surface of the movable disk body outside the drainage cone along the circumferential direction, a plurality of radial grooves are formed in the bottom surface of each radial water flow channel from inside to outside, and a circle of annular circumferential water flow channels are formed between the inner adjacent radial grooves and the outer adjacent radial grooves; according to the invention, when the liquid flows through grooves with different directions, different depths and different lengths on the surface of the tray body, gas nuclei in the liquid develop into cavitation bubbles, and generated high-temperature, high-pressure and high-speed microjet flow pulverizes and decomposes impurities in turbid liquid, so that the purposes of efficiently breaking walls and removing impurities of the turbid liquid in a large scale and continuously are achieved.
Description
Technical Field
The invention relates to a liquid wall breaking treatment device, in particular to a device for breaking the wall of impurities in turbid liquid by cavitation effect energy.
Background
Along with the development of human civilization, the requirements of people on life quality are higher and higher, and the requirements of the content of impurities in various liquids closely related to life are more accurate. Such as purification treatment of various complex chemical components and particulate matters contained in industrial wastewater and domestic sewage; processing sediment in fruit juice, beverage and flavoring products; and processing tiny raw material residues during decoction preparation. However, the existing method for treating the impurities in the turbid liquid is difficult to meet the requirements of modern society on the impurity content and smaller granularity of the liquid, so that an efficient and economical treatment device is needed.
Many solutions in living goods have tiny inorganic matters inside, which affects the use feeling of the solution. In general, large particulate matters in a liquid are removed by a method such as a screen, a micro-filter, etc., and suspended matters and colloidal matters in the liquid are removed by a method such as coagulation and air floatation. The screen cloth and the micro-filter work mode are approximately the same, and the screen cloth with proper aperture is selected to filter the impurity particles in the liquid, so that the particles screened out by the screen cloth easily block the holes during the filtration, and the screen cloth needs to be cleaned in time, thereby wasting time and energy. Coagulation refers to the combination of two processes, coagulation, which refers to the process of destabilizing the colloid and aggregating it into micro-flocs, and flocculation, which refers to the process of micro-flocs growing into larger flocs by adsorption, tape winding and bridging. The treatment of suspended and colloidal substances in liquids by coagulation requires the aid of coagulants, coagulants-aids, and has high technical requirements while generating high costs. The air-float method uses highly dispersed tiny bubbles as carriers to remove suspended matters in the adhered liquid, so that the suspended matters are separated and removed along with the flotation of the bubbles, the maintenance and management workload of equipment is huge, and a pressure reducing valve, a releaser and the like through which the liquid passes are easy to be blocked.
The liquid generally contains tiny bubbles which cannot be seen by human eyes, when high-speed jet flows through the nozzle, the pressure at the outlet of the nozzle is reduced sharply and is lower than the saturated vapor pressure of the fluid medium, so that a large amount of cavitation nuclei are generated, and the cavitation nuclei enter static water together with the high-speed jet and are sheared strongly with the static water, so that a local area in a flow field is instable, and low-pressure vortex occurs. The low-pressure vortex can further inoculate more cavitation nuclei, the cavitation nuclei generated by the low-pressure vortex and the cavitation nuclei move downstream under the drive of high-speed jet flow and are gathered to form cavitation bubble groups to form cavitation bubble cloud, when the ambient pressure is higher than the bubble internal pressure, the cavitation bubble cloud is concentrated to collapse, the collapse process is very short, only between microseconds, but local high-temperature and high-pressure points can be generated, meanwhile, impact waves and microjet with huge energy are generated, the speed of the microjet is higher than 1500 m/s, and a hot spot is formed under the environment and is called cavitation water jet. This phenomenon from bubble generation, development to collapse is called cavitation. The high temperature, high pressure and micro-jet generated by bubble collapse in cavitation effect can not only crush organic matters and inorganic matters in the turbid liquid, but also decompose free radicals in part of the liquid and break carbon bonds of a macromolecular main chain. Therefore, the cavitation technology for removing impurities in the turbid liquid has the advantages of environmental protection, high efficiency, low cost and the like.
The device disclosed in the Chinese patent publication No. CN101687129B and named as a device for removing impurities in liquid comprises a liquid inlet pipe, an impurity separation net body, a pneumatic chamber, a liquid discharge pipe, an impurity discharge pipe and a ball valve, wherein a through hole is formed in the ball valve; when the impurities are discharged, the ball valve through hole is aligned with the impurities discharging pipe, the liquid inlet pipe is closed, the air pressure chamber is opened, and the impurities are discharged from the impurities discharging pipe under the gas pressure and the liquid flow; the device has complex structure, difficult maintenance and needs to clean impurity separation net in time to prevent blockage. The drum filter proposed in the publication CN106110737a entitled "a device for removing impurities from liquid and a method for cleaning the corresponding device" filters impurities, removes impurities from liquid, includes a drum driver, a drum filter, and a nozzle, the drum driver generates driving force to drive the drum filter to rotate around a prescribed rotation axis, the drum filter has a cylindrical filter screen, the nozzle moves along a guide rail by means of the driver to spray cleaning liquid to clean the filter screen, prevent clogging, and finally the impurities fall into the drum filter and are discharged; however, the device is inefficient and susceptible to secondary contamination of the cleaning liquid. The device for removing liquid impurities by chemistry proposed in the document of Chinese patent publication No. CN209406074U, named as a device for removing liquid impurities, comprises a first reaction kettle, a second reaction kettle, a condenser and a filter, wherein the device is characterized in that adsorptive chemical substances such as activated carbon are introduced into the first reaction kettle, impurities in ethylene glycol are adsorbed and filtered, then enter the second reaction kettle, the second reaction kettle is heated to the ethylene glycol gasification temperature, and the second reaction kettle is condensed in the condenser and filtered for the second time, so that the effect of removing the impurities in the ethylene glycol is achieved, however, the device uses chemical agents, and the operation is complex and has pollution.
Disclosure of Invention
The invention aims to solve the problems of easy blockage and low wall breaking efficiency, need of timely cleaning, pollution, high technical requirements and the like of a filter screen in the traditional impurity removing methods such as a filtering method, an air floatation method, a coagulation method, a chemical method and the like, and provides a novel efficient cavitation wall breaking generating device which is free of filter screen and pollution and is used for efficiently breaking the wall and removing impurities of turbid liquid.
The invention relates to a high-efficiency cavitation wall breaking generating device, which adopts the following technical scheme: the device is provided with a closed cavitation wall breaking tank, a cavitation wall breaking device consisting of a nozzle, a nozzle chassis and a movable disc body is arranged in the cavitation wall breaking tank, liquid to be broken enters the nozzle from an inlet at the upper end of the nozzle, a conical outlet at the lower end of the nozzle is fixedly connected with the center of the nozzle chassis, and a through hole which penetrates up and down is formed in the center of the nozzle chassis; a solid disc-shaped movable disc body which is not contacted with the nozzle chassis is arranged right below the nozzle chassis, the center of the bottom of the movable disc body is fixedly connected with an output shaft of a high-speed driving motor through a transmission shaft, and the high-speed driving motor drives the movable disc body to rotate; the middle of the upper surface of the movable disk body is vertically and upwards protruded with a drainage cone with a small upper part and a large lower part which extend into the nozzle outlet, and the cone angle of the drainage cone is the same as that of the nozzle outlet; three annular grooves along the circumferential direction are formed in the side wall of the drainage cone at intervals from top to bottom, the depth of the three annular grooves decreases from top to bottom, and the length along the water flow direction decreases; the upper surface of the movable disk body outside the drainage cone is uniformly provided with a plurality of same radial water flow channels along the circumferential direction, the central line of each radial water flow channel from inside to outside is a rotation line, and the rotation direction of the rotation line is the same as that of the movable disk body; a plurality of radial grooves are formed in the bottom surface of each radial water flow channel from inside to outside, the upper and lower depths of the plurality of radial grooves from inside to outside are decreased progressively, and the lengths of the radial grooves along the water flow direction are decreased progressively; a circle of annular circumferential water flow channels are arranged between the inner radial groove and the outer radial groove on the upper surface of the movable disc body, and all the circumferential water flow channels are communicated with all the radial water flow channels; the bottom surface of each circumferential water flow channel is uniformly provided with a plurality of circumferential grooves along the circumferential direction, and the circumferential grooves and the radial water flow channels are staggered along the circumferential direction.
Further, the up-down depth of all radial grooves and circumferential grooves form a gradient from low to high from inside to outside.
Further, a plurality of convex bodies which are uniformly distributed along the same circumferential direction and are arranged along the same radial direction and inside and outside are arranged on the lower surface of the nozzle chassis along the circumferential direction, and the plurality of convex bodies downwards extend into the circumferential channel.
Further, the number of the convex bodies extending into the same circumferential water flow channel is the same as the number of the circumferential grooves on the same circumferential water flow channel, the radial width of the convex bodies is smaller than that of the circumferential water flow channel, the bottom surfaces of the convex bodies are not contacted with the bottom surfaces of the circumferential water flow channels, and the lengths of the convex bodies along the liquid flowing direction are consistent with the circumferential grooves; the plurality of circumferential grooves on the same circumferential water flow channel have the same structure.
Compared with the prior art, the invention has the following outstanding beneficial effects:
(1) According to the invention, when the liquid flows through grooves with different directions, different sizes, different depths and different lengths on the surface of the tray body, negative pressure is formed at the dispersing gap of the grooves on the surface, gas nuclei in the liquid develop into cavitation bubbles, and the cavitation bubbles develop and collapse along with the liquid flowing to a high-pressure area to generate high-temperature, high-pressure and high-speed microjet so as to crush and decompose impurities in turbid liquid, thereby achieving the purposes of high efficiency, high quality, mass and continuous wall breaking and impurity removal of turbid liquid.
(2) According to the invention, the movable disk body rotates at a high speed, so that a centrifugal force is generated when high-pressure liquid flows to the groove of the movable disk body through the nozzle, the cavitation efficiency of the liquid in the radial direction of the movable disk body is improved, the output pressure of the nozzle can be effectively reduced, and the cavitation economy is improved. Meanwhile, when the movable disk body rotates at a high speed, grooves distributed in the circumferential direction are matched with the convex bodies on the upper surface of the nozzle disk, pressure changes and pressures are formed by different distances between the bottom surfaces of different volumes and the convex bodies in the groove areas in the circumferential direction of the movable disk body, cavitation of different degrees is generated, and multi-stage efficient cavitation is realized. The movable disc body runs at high speed to enable the liquid in the cavitation wall breaking tank to be uniformly mixed, so that substances or impurities to be broken in the liquid are effectively prevented from sinking at the bottom of the tank, and the cavitation wall breaking efficiency is improved.
Drawings
The invention is described in further detail below with reference to the attached drawings and detailed description:
FIG. 1 is a schematic diagram of the overall structure of a high-efficiency cavitation wall breaking generating device;
FIG. 2 is an enlarged view of the nozzle 13, nozzle base plate 14 and movable plate 12 of FIG. 1;
FIG. 3 is an isometric view of the nozzle 13 and nozzle chassis 14 of FIG. 2;
FIG. 4 is an enlarged isometric view of the movable disk 12 of FIG. 2;
FIG. 5 is a partial cross-sectional view of the internal structure of FIG. 2;
FIG. 6 is an enlarged view of the right half of the drainage cone 17 and partial nozzle 13 of FIG. 5 and illustrates cavitation;
FIG. 7 is a top view of FIG. 2 and a radial cross-sectional view of a radial water flow passage in the movable disk 12;
FIG. 8 is a partial axial cross-sectional view of the nozzle chassis 14 and radial water flow passages of FIG. 7 and creating a schematic cavitation;
FIG. 9 is a partial radial cross-sectional view of the circumferential water flow channel on the movable disk 12 from the top view of FIG. 2;
FIG. 10 is a partial axial cross-sectional view of the nozzle chassis 14 and circumferential water flow channels of FIG. 9 and creating a schematic cavitation;
fig. 11 is a partial axial cross-sectional view of the bulge and circumferential channel on the nozzle base plate 14 of fig. 9 and schematic drawing of cavitation.
Reference numerals illustrate:
1. a high pressure water pump; 2. a cavitation wall breaking pool; 3. cavitation wall breaking device; 4. a particulate matter sensor; 5. a liquid injection port; 6. a liquid circulation inlet; 7. a high-speed driving motor; 8. a transmission shaft; 9. an agitation device; 10. a liquid discharge port; 12. a movable tray body; 13. a nozzle; 14. a nozzle chassis; 15. a convex body I; 16. a second convex body; 17. a drainage cone; 18. a cone annular groove I; 19. a cone annular groove II; 20. a cone annular groove III; 21. radial water flow channels; 22. a first circumferential water flow channel; 23. a circumferential water flow channel II; 24. radial groove I; 25. radial grooves II; 26. radial grooves III; 27. a circumferential groove; 28. cavitation bubble groups generated by the cone annular groove III; 29. cavitation bubble groups generated by the cone annular groove II; 30. cavitation bubble groups generated by the cone annular groove I; 31. cavitation bubble groups generated by the radial grooves I; 32. cavitation bubble groups generated by the radial grooves II; 33. cavitation bubble groups generated by the radial grooves III; 34. cavitation bubble groups generated by the cooperation of the nozzle chassis and the circumferential groove; 35. the convex body is matched with the circumferential groove to generate cavitation bubble groups.
Detailed Description
As shown in figures 1 and 2, the high-efficiency cavitation wall-breaking generating device provided by the invention is provided with a closed cavitation wall-breaking tank 2, and the cavitation wall-breaking tank 2 is hollow and cylindrical. The cavitation broken wall pond 2 is inside to be equipped with broken wall device 3, and cavitation broken wall device 3 comprises nozzle 13, nozzle chassis 14 and movable disk body 12, and the top of cavitation broken wall device 3 is nozzle 13, and nozzle 13 upper end is the entry, waits that broken wall liquid gets into nozzle 13 from nozzle 13 entry. The lower end of the nozzle 13 is an outlet, the outlet of the lower end is fixedly connected with a nozzle chassis 14, the nozzle chassis 14 is disc-shaped, and a through hole which penetrates up and down is formed in the center and is communicated with the nozzle 13. The outlet of the nozzle 13 is a conical outlet with a smaller upper part and a larger lower part. Directly below the nozzle chassis 14 is a movable disk body 12, the outer diameter of the nozzle chassis 14 is larger than the outer diameter of the movable disk body 12, and the outer diameter of the movable disk body 12 is far larger than the inner diameter at the outlet of the nozzle 13. The movable disk body 12 is not contacted with the nozzle chassis 14, and a liquid water flow channel to be broken is reserved between the movable disk body and the nozzle chassis. The lower bottom surface of the nozzle chassis 14 is spaced 2mm from the upper bottom surface of the movable tray body 12. The central axes of the nozzle 13, the nozzle chassis 14 and the movable disk body 12 are collinear.
The movable disc body 12 is solid disc-shaped, and the bottom center is fixedly connected with the output shaft of the high-speed driving motor 7 through the transmission shaft 8. The high-speed driving motor 7 is vertically arranged up and down, the transmission shaft 8 is also vertically arranged up and down, the upper end of the transmission shaft 8 is fixedly connected with the bottom center of the movable disc body 12, the lower end of the transmission shaft is fixedly connected with the output shaft of the high-speed driving motor 7, and the high-speed driving motor 7 is arranged below the cavitation wall breaking pool 2. When the high-speed driving motor 7 works, the movable disc 12 is driven to rotate by the high-speed driving motor 7. An agitating device 9 is arranged between the wall breaking device 3 and the bottom of the cavitation wall breaking tank 2, the agitating device 9 is coaxially and fixedly sleeved on a transmission shaft 8 and is positioned right below a movable disc body 12, and the agitating device 9 rotates along with the transmission shaft 8 and simultaneously rotates with the movable disc body 12. The wall breaking device 3 is arranged at the upper position of the inner center of the cavitation wall breaking tank 2, and the stirring device 9 is arranged at the lower position of the inner center of the cavitation wall breaking tank 2.
The side wall of the bottom of the cavitation wall-breaking tank 2 is provided with a liquid circulation inlet 6 and a liquid outlet 10, the side wall of the top of the cavitation wall-breaking tank 2 is provided with a liquid injection opening 5, and the wall-breaking liquid to be broken is injected into the cavitation wall-breaking tank 2 from the liquid injection opening 5 to submerge the cavitation wall-breaking device 3. The liquid circulation inlet 6 is connected with the inlet of the nozzle 13 through a pipeline, the high-pressure water pump 1 is arranged on the pipeline, the high-pressure water pump 1 works, and liquid to be broken is pumped into the nozzle 13 from the cavitation wall breaking tank 2. The stirring device 9 rotates at a high speed along with the transmission shaft 8 to stir the liquid in the cavitation wall breaking tank 2, so that the liquid to be broken in the cavitation wall breaking tank 2 is uniformly mixed, and the cavitation wall breaking effect is uniform.
A plurality of particle sensors 4 are uniformly arranged in the circumferential directions of the upper section, the middle section and the lower section of the inner wall of the cavitation wall breaking tank 2, and the impurity content granularity of the liquid to be broken is monitored in real time.
As shown in fig. 3, a plurality of projections are provided on the lower surface of the nozzle chassis 14 in the circumferential direction, and these projections are uniformly distributed in the same circumferential direction and are arranged radially inward and outward in the same direction. These projections cooperate with circumferential channels in the movable disk 12 and extend downwardly in the circumferential channels. Fig. 3 shows only two layers of projections, an inner layer of projection 15 and an outer layer of projection 16, respectively.
As shown in fig. 4, 5 and 6, the upper surface of the movable disk 12 is vertically and upwardly protruded with a drainage cone 17 in the middle, and the central axis of the drainage cone 17 is collinear with the central axis of the movable disk 12. The drainage cone 17 is conical with a small upper part and a large lower part, and extends into the outlet of the nozzle 13, the cone angle of the drainage cone 17 is the same as the cone angle of the outlet of the nozzle 13, the side wall of the drainage cone 17 is not contacted with the side wall of the outlet of the nozzle 13, a constant gap of 2mm is reserved between the side wall of the drainage cone 17 and the side wall of the outlet of the nozzle 13, the liquid to be broken wall enters the nozzle 13 through the high-pressure water pump 1, and is drained through the drainage cone 17, and the liquid is sprayed on the movable disc body 12 downwards from the gap. The bottom outer diameter of the drainage cone 17 is smaller than the bottom outer diameter of the outlet of the nozzle 13, and the axial height of the drainage cone 17 is smaller than the axial height of the outlet of the nozzle 13.
The side wall of the drainage cone 17 is provided with three annular grooves which are formed in a circle along the circumferential direction, namely a cone annular groove III 20, a cone annular groove II 19 and a cone annular groove I18 from top to bottom. The three annular grooves are arranged at intervals in the axial direction and are parallel to each other in the radial direction. The depth of the three annular grooves from top to bottom is reduced in sequence, the lengths of the three annular grooves along the water flow direction are reduced in sequence and gradually reduced, so that the volumes of the three annular grooves from top to bottom are reduced in sequence and gradually reduced. Referring to fig. 6, when the liquid to be broken is drained through the drainage cone 17, the liquid enters three annular grooves in sequence, negative pressure is formed at the diverging gap of the annular grooves, cavitation is generated when the negative pressure reaches a limit value, bubbles start to form at the diverging gap, the bubbles gradually expand in the flowing process along with the continuous flowing of the liquid, and finally the bubbles are broken, so that high pressure, high temperature, strong shock waves and high-speed microjet are generated to break the wall of the substance of the liquid to be broken. When the liquid to be broken flows downwards along the axial direction, the liquid passes through three annular grooves with different sizes and depths, namely, the three annular grooves with different sizes, namely, the three annular grooves with different depths, namely, the three annular grooves with different sizes, the two annular grooves with different depths, namely, the first annular groove with different depths, the three annular grooves with different depths and the three annular grooves with different depths, each time, the turbid liquid flows through the annular grooves once, the turbid liquid forms vortex at local parts due to the sudden change of the flowing direction and the flowing speed of part of the turbid liquid, so that pressure loss is generated due to mutual collision and violent friction among liquid particles, particles and solid wall surfaces, a negative pressure area is formed at the dispersing gap of the annular grooves, when the pressure value of the negative pressure area is lower than the saturated vapor pressure of a fluid medium, a large number of bubbles are generated at the dispersing gap, and the pressure of the liquid gradually increases when the bubbles flow out of the annular grooves with the bubbles, the bubbles develop and collapse, and collapse along with the bubbles, and generate high-temperature high-pressure high-speed water jet streams to pulverize impurities in the liquid.
The volume space of the cone annular groove III 20 is largest, the area of the low-pressure area is largest, the area of the high-pressure area is smallest, a large number of cavitation bubble groups 28 are generated, the cavitation bubble groups 28 flow along with the water to the high-pressure area, the cavitation bubble groups 28 collectively grow, develop, collapse and collapse in a very short time in the flowing process, a large amount of energy is released, and larger, firm inorganic matters and organic matters in the liquid are crushed and decomposed. The cavitated liquid to be broken continuously flows through the second cone annular groove 19 along the drainage cone 17, the kinetic energy is lost in the flowing process, the flow speed of the liquid is reduced, in order to ensure that the pressure value in the negative pressure area is lower than the saturated vapor pressure of the fluid medium, the depth of the second cone annular groove 19 is designed to be shallower than the depth of the third cone annular groove 20, the length of the third cone annular groove 20 along the flowing direction of water flow is smaller than the length of the third cone annular groove 20 along the flowing direction of water flow, the cavity space formed by the second cone annular groove 19 is designed to be smaller than the cavity formed by the third cone annular groove 20, the volume of the negative pressure area formed at the moment is smaller, the scale of the generated cavitation bubble group 29 is slightly smaller, and the residual impurities in the liquid are cavitated and decomposed again by the energy released by the collapse of the cavitation bubble group 29. The liquid subjected to cavitation treatment by the cone annular groove II 19 continuously flows to the cone annular groove I18 at the lowest part through the drainage cone 17, at the moment, the liquid flow speed is further slowed down through liquid flow and decompression, in order to control the pressure of the negative pressure area to reach the liquid saturated vapor pressure, the depth of the cone annular groove I18 is designed to be shallower than the depth of the cone annular groove II 19, the length along the water flow is smaller than the length along the water flow of the cone annular groove II 19, the cavity space formed by the cone annular groove I18 is smaller than the cavity formed by the cone annular groove II 19, the cavity space is designed to be minimum, and the energy released by the formed cavitation bubble group 30 further cavitates and decomposes the liquid subjected to multiple treatments. Thus, the liquid subjected to the three cavitation treatments flows down onto the movable disk 12 through the drain cone 17.
Referring to fig. 4, 7 and 8, a plurality of identical radial water flow passages 21 are uniformly arranged on the upper surface of the movable disk body 12 outside the drainage cone 17 along the circumferential direction, and the center line of each radial water flow passage 21 from inside to outside is a divergent rotation line, and the rotation direction of the divergent rotation line is the same as the rotation direction of the movable disk body 12. The bottom surface of the inner end of the radial water flow channel 21 is lower than the bottom surface of the drainage cone 17 or is flush with the bottom surface of the drainage cone 17, and the bottom surface of the radial water flow channel 21 gradually inclines downwards from inside to outside or is integrally a horizontal surface. When the bottom surfaces of the radial water flow channels 21 are gradually inclined downward from inside to outside, the center line of each radial water flow channel 21 from inside to outside is a spiral rotation line, i.e., a spiral line.
A plurality of radial grooves are formed on the bottom surface of each radial water flow channel 21 from inside to outside, two adjacent radial grooves are not communicated and are spaced, and the radial distances between the two adjacent radial grooves from inside to outside are equal. The number of radial grooves is dependent on the outer diameter of the movable disk 12. In fig. 8, only three radial grooves are shown, namely grooves with different depths and lengths in three dimensions of large, medium and small, namely radial groove one 24, radial groove two 25 and radial groove three 26 from inside to outside. The upper and lower depths of the plurality of radial grooves from inside to outside become smaller in sequence, the lengths along the flowing direction of the water flow become shorter in sequence, and the volumes of the plurality of radial grooves become smaller in sequence from inside to outside.
The liquid to be broken wall flows downwards to the radial water flow channel 21 through the drainage cone 17, and flows through the radial groove I24, the radial groove II 25 and the radial groove III 26 in sequence in the radial water flow channel 21. When the wall breaking liquid passes through the radial groove I24 with the maximum depth and length, negative pressure is formed at the inner diverging gap, cavitation is generated when the negative pressure reaches the limit value, cavitation bubble group 31 is formed at the diverging gap, the cavitation bubble group 31 gradually expands in the flowing process along with the continuous flowing of the liquid, and finally breaks, high pressure, high temperature, strong shock wave and high-speed microjet are generated, so that the wall of the substance of the liquid to be broken is broken. Although the pressure of the liquid to be broken is reduced and the energy is lost at the radial grooves II 25 and III 26, the size depth and the length of the radial grooves II and III 26 are controlled to be reduced, so that the same negative pressure is formed at the divergence gap of the radial grooves II and III 26, cavitation bubble groups 32 and 33 are generated, and the same cavitation effect is achieved. The principle of operation is the same as the large, medium and small annular grooves in the drainage cone 17.
The movable disk body 12 rotates at a high speed under the drive of the high-speed driving motor 7, and the liquid to be broken wall in the movable disk body 12 is subjected to centrifugal action and flows along the radial water flow channel 21. When the liquid to be broken is subjected to high-speed centrifugation, the liquid to be broken is drained to the movable disc body 12, and meanwhile, the pressure of the nozzle 13 can be effectively reduced, so that the cavitation wall breaking effect is better.
Referring to fig. 9 and 10, on the upper surface of the movable disk 12, between the inner and outer adjacent radial grooves is a ring-shaped circumferential water flow passage, only two circumferential water flow passages, an inner circumferential water flow passage one 22 and an outer circumferential water flow passage two 23, are shown in fig. 4. All circumferential water flow channels communicate with all radial water flow channels 21. The bottom surface of the circumferential water flow channel is flush with the bottom surface of the radial water flow channel 21. The number of the circumferential water flow channels is adapted to the number of the radial grooves and is one less than the number of the radial grooves. The inner and outer walls of the circumferential water flow channels are flush with the side walls of the adjacent radial grooves. The central axis of each circumferential water flow channel is collinear with the central axis of the movable disk 12. When the liquid to be broken passes through the large-volume radial groove I24, the liquid is split before flowing to the radial groove II 25, one part of the liquid enters the circumferential water flow channel I22, and the other part of the liquid enters the radial groove II 25.
A plurality of circumferential grooves 27 are uniformly formed in the bottom surface of each circumferential water flow channel along the circumferential direction, and one circumferential groove 27 is positioned between two adjacent radial water flow channels 21 along the circumferential direction, so that the number of the circumferential grooves 27 is the same as the number of the radial water flow channels 21, and the circumferential grooves 27 are staggered with the radial water flow channels 21 along the circumferential direction.
The plurality of circumferential grooves 27 on the same circumferential water flow channel have the same structure, and the bottom surfaces of the plurality of circumferential grooves 27 on the same circumferential water flow channel are higher than the bottom surfaces of the radial grooves on the inner side and lower than the bottom surfaces of the radial grooves on the outer side, so that the depths of all the grooves of the radial grooves and the circumferential grooves 27 form a gradient from the inner side to the high side.
As shown in fig. 3 and 11, in the circumferential water flow channel, the convex body at the bottom of the nozzle chassis 14 is cooperatively installed, for example, the convex body one 15 is directly above the circumferential water flow channel one 22, and the convex body two 16 is directly above the circumferential water flow channel two 23. The number of projections in the same circumferential flow channel is the same as the number of circumferential grooves 27. The radial width of the boss is 1 mm less than the radial width of the mating circumferential water flow channel. The bottom surface of the convex body is not contacted with the bottom surface of the circumferential water flow channel, and a gap is reserved; the length of the projections in the direction of liquid flow coincides with the circumferential groove 27. A variable cross-section of the interior of the circumferential water flow channel is achieved, which varies the pressure in the circumferential groove 27.
As shown in fig. 10. When the wall-broken liquid flows through the circumferential groove 27 of the first circumferential water flow channel 22, the divergence gap is formed by the space between the nozzle chassis 14 and the circumferential groove 27, the height from the bottom surface of the nozzle chassis 14 to the bottom surface of the circumferential groove 27 is larger than the height from the bottom surface of the convex body 15 of the nozzle chassis 14 to the bottom surface of the circumferential groove 27, therefore, the cavity volume formed by the nozzle chassis 14 and the circumferential groove 27 is larger than the cavity volume formed by the convex body 15 and the circumferential groove 27, the area of a low-pressure area formed when the liquid flows through the circumferential groove 27 is large, a large number of cavitation bubble groups 34 are generated, and the cavitation bubble groups 34 release a large amount of energy along with the flow of the liquid to the high-pressure area in a short time to break up and decompose liquid impurities in the circumferential water flow channel. As shown in fig. 11, the liquid to be broken flows through the circumferential groove 27 of the circumferential water flow channel one 22, the groove divergent gap is formed by the convex body one 15 and the circumferential groove 27 matched with the circumferential water flow channel one 22, the volume of the cavity inside the groove is slightly reduced, and the situation aims at the liquid which is subjected to one or more cavitation in the channel and causes kinetic energy loss, so that the pressure in a negative pressure area can still be kept lower than the saturated vapor pressure of the liquid in a small cavity, cavitation bubble groups 35 are generated, and a large amount of energy released by collapsing the cavitation bubble groups 35 further removes impurities and purifies the liquid. The liquid to be broken wall flows through the first circumferential water flow channel 22 and passes through different groove sizes and emission gaps to generate different cavitation effects, and the wall is broken by high-efficiency cavitation. The liquid to be broken wall passes through the radial water flow channel 21 and the circumferential water flow channel, and multi-stage high-efficiency cavitation wall breaking is generated on the nozzle chassis 14 and the movable tray body 12.
The high-pressure water pump 1 and the high-speed driving motor 7 are started, the nozzle 13 and the nozzle chassis 14 are fixed, the liquid to be broken is sprayed from the nozzle 13 to the movable disc body 12 rotating at high speed, when the liquid to be broken is subjected to the centrifugal action of the high-speed rotation of the movable disc body 12 in the cavitation wall breaking tank 2, the wall breaking device 2 is thrown out, and the particle sensors 4 positioned in the upper part, the middle part and the bottom of the cavitation wall breaking tank 2 detect the particle content of the liquid in the cavitation wall breaking tank 2 and the cavitation effect of the liquid to be broken. When the cavitation effect of the liquid to be broken is not up to the requirement, the high-speed driving motor 7 continues to work to drive the wall breaking device 2 and the stirring device 9 to continue to rotate. When the cavitation effect of the liquid to be broken reaches the requirement, the high-speed driving motor 7 stops working, and the liquid after cavitation wall breaking is discharged through the liquid discharge outlet 10. After the liquid after cavitation wall breaking is discharged, new liquid to be broken is injected into the cavitation wall breaking tank 2 through the liquid injection port 5, and the circulation is performed. In the circulation process, liquid continuously enters the movable disc body 12 through the nozzle 13, pressure changes are generated in the radial direction and the circumferential direction of the movable disc body 12 at the variable cross section position due to the grooves, gas bubbles are formed by precipitation of gas nuclei due to pressure reduction, water flows carrying the bubbles to flow to a high-pressure area, a large amount of energy is collapsed and released in the high-pressure area, inorganic matters and organic matters in the liquid are broken, crushed and decomposed, and the effects of breaking the wall and removing impurities of turbid liquid are achieved. In this process, the liquid is split into two flow directions: in the radial flow direction of the movable disk body 12, the shape of the liquid flow passage is set, and grooves of different sizes and depths, different lengths, and different directions are set in the path. When the liquid flows through the radial grooves in the radial direction, cavitation effects of different degrees can be generated in one channel for multiple times, and multiple times of cavitation treatment is carried out on impurities in the liquid; the other flow direction is in the circumferential flow direction of the movable disk body 12, grooves are processed in the circumferential path, protrusions matched with the grooves are distributed at the bottom of the nozzle, and when the movable disk body rotates at high speed, the grooves in the circumferential direction of the movable disk body are continuously matched with the protrusions at the bottom of the nozzle disk bottom 14 to form cavities and shapes with different volumes, different pressure changes are generated, and multiple different cavitation effects are achieved. Simultaneously, the centrifugal force and the fluid power generated by the high-speed rotation of the movable disk body 12 are utilized to carry out liquid, so that the elimination of cavitation wall-broken liquid is ensured, and meanwhile, the pressure required by the nozzle 13 can be reduced. The liquid generates multiple cavitation effects to form high-temperature, high-pressure and high-speed microjet to crush and decompose impurities such as particles in the liquid when passing through multiple variable volumes and variable cross sections in the circumferential direction and the radial direction, so that the effects of breaking walls and removing impurities of turbid liquid are achieved. The multistage multichannel groove design realizes an efficient, large-batch and continuous liquid treatment process.
The present embodiment is only for explanation and not limitation of the present invention, and modifications of the present embodiment without creative contribution can be made by those skilled in the art after reading the present specification as required, but are protected by the present invention within the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a high-efficient cavitation broken wall generating device, has a confined cavitation broken wall pond (2), characterized by: the cavitation wall breaking device (3) consisting of a nozzle (13), a nozzle chassis (14) and a movable disc body (12) is arranged in the cavitation wall breaking tank (2), liquid to be broken enters the nozzle (13) from an inlet at the upper end of the nozzle (13), a conical outlet at the lower end of the nozzle (13) is fixedly connected with the center of the nozzle chassis (14), and a through hole which is penetrated up and down is formed in the center of the nozzle chassis (14); a solid disc-shaped movable disc body (12) which is not contacted with the nozzle chassis (14) is arranged right below the nozzle chassis (14), the center of the bottom of the movable disc body (12) is fixedly connected with an output shaft of a high-speed driving motor (7) through a transmission shaft (8), and the high-speed driving motor (7) drives the movable disc body (12) to rotate;
the upper surface of the movable disk body (12) vertically protrudes upwards from the middle to the right and upwards to form a drainage cone (17) with a small upper part and a large lower part, which extends into the outlet of the nozzle (13), the cone angle of the drainage cone (17) is the same as the cone angle of the outlet of the nozzle (13), and a gap is reserved between the side wall of the drainage cone (17) and the side wall of the outlet of the nozzle (13); three annular grooves along the circumferential direction are formed in the side wall of the drainage cone (17) at intervals from top to bottom, the depth of the three annular grooves decreases from top to bottom, and the length along the water flow direction decreases;
the upper surface of the movable disk body (12) at the outer side of the drainage cone (17) is uniformly provided with a plurality of identical radial water flow channels (21) along the circumferential direction, the central line of each radial water flow channel (21) from inside to outside is a rotation line, and the rotation direction of the rotation line is identical with the rotation direction of the movable disk body (12); a plurality of radial grooves are formed on the bottom surface of each radial water flow channel (21) from inside to outside, the upper and lower depths of the plurality of radial grooves from inside to outside are decreased progressively, and the lengths of the radial grooves along the water flow direction are decreased progressively;
a circle of annular circumferential water flow channels are arranged between the inner and outer adjacent radial grooves on the upper surface of the movable disc body (12), and all the circumferential water flow channels are communicated with all the radial water flow channels (21); the bottom surface of each circumferential water flow channel is uniformly provided with a plurality of circumferential grooves (27) along the circumferential direction, and the circumferential grooves (27) and the radial water flow channels (21) are staggered along the circumferential direction.
2. The efficient cavitation wall breaking generating device according to claim 1, wherein: the lower surface of the nozzle chassis (14) is provided with a plurality of convex bodies which are uniformly distributed along the same circumferential direction and are arranged along the same radial direction and inside and outside along the circumferential direction, and the convex bodies downwards extend into the circumferential water flow channel.
3. The efficient cavitation wall breaking generating device according to claim 2, wherein: the number of the convex bodies extending into the same circumferential water flow channel is the same as the number of the circumferential grooves (27) on the same circumferential water flow channel, the radial width of the convex bodies is smaller than that of the circumferential water flow channel, the bottom surfaces of the convex bodies are not contacted with the bottom surfaces of the circumferential water flow channels, and the lengths of the convex bodies along the liquid flowing direction are consistent with the circumferential grooves (27); the plurality of circumferential grooves (27) on the same circumferential water flow channel are identical in structure.
4. The efficient cavitation wall breaking generating device according to claim 1, wherein: all radial grooves and circumferential grooves (27) have a gradient from low to high from inside to outside in depth.
5. The efficient cavitation wall breaking generating device according to claim 1, wherein: the outer diameter of the bottom of the drainage cone (17) is smaller than that of the outlet of the nozzle (13), and the axial height of the drainage cone (17) is smaller than that of the outlet of the nozzle (13).
6. The efficient cavitation wall breaking generating device according to claim 1, wherein: the bottom surface of the inner end of the radial water flow channel (21) is lower than the bottom surface of the drainage cone (17) or is flush with the bottom surface of the drainage cone (17), and the bottom surface of the radial water flow channel (21) gradually inclines downwards from inside to outside or is a horizontal surface; when the bottom surfaces of the radial water flow channels (21) are gradually inclined downwards from inside to outside, the center line of each radial water flow channel (21) from inside to outside is a spiral line.
7. The efficient cavitation wall breaking generating device according to claim 1, wherein: the bottom surface of the circumferential water flow channel is flush with the bottom surface of the radial water flow channel (21), the number of the circumferential water flow channels is one less than that of the radial grooves, the inner wall and the outer wall of the circumferential water flow channel are flush with the side walls of the adjacent radial grooves, and the central axis of each circumferential water flow channel is collinear with the central axis of the movable disc body (12).
8. The efficient cavitation wall breaking generating device according to claim 1, wherein: an agitating device (9) is arranged in the cavitation wall breaking tank (2), and the agitating device (9) is coaxially and fixedly sleeved on the transmission shaft (8) and is positioned under the movable disc body (12).
9. The efficient cavitation wall breaking generating device according to claim 1, wherein: the side wall of the bottom of the cavitation wall breaking tank (2) is provided with a liquid circulation inlet (6) and a liquid outlet (10), the side wall of the top of the cavitation wall breaking tank (2) is provided with a liquid injection opening (5), the wall breaking liquid is injected into the cavitation wall breaking tank (2) from the liquid injection opening (5), the cavitation wall breaking device (3) is submerged, the liquid circulation inlet (6) is connected with the inlet of a nozzle (13) through a pipe, and the pipe is provided with a high-pressure water pump (1).
10. The efficient cavitation wall breaking generating device according to claim 1, wherein: a plurality of particle sensors (4) are uniformly arranged in the circumferential directions of the upper section, the middle section and the lower section of the inner wall of the cavitation wall breaking tank (2), and the impurity content granularity inside the liquid to be broken is monitored.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102491486A (en) * | 2011-12-19 | 2012-06-13 | 中国人民解放军后勤工程学院 | Equipment for degrading phenol-containing wastewater by using reinforced water jet cavitation process |
| CN105481054A (en) * | 2015-12-30 | 2016-04-13 | 陕西师范大学 | Jet loop reactor with guiding body component |
| CN207468248U (en) * | 2017-07-31 | 2018-06-08 | 核工业理化工程研究院 | A kind of shearing Hydrodynamic cavitation generating means |
| CN110455114A (en) * | 2019-08-09 | 2019-11-15 | 大连斯频德环境设备有限公司 | A kind of hollow rotatable spray nozzle device of centrifugal rotational flow |
| CN111977773A (en) * | 2019-05-22 | 2020-11-24 | 刘进国 | Cavitation crusher and using method thereof |
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2022
- 2022-09-29 CN CN202211200775.4A patent/CN115504529B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102491486A (en) * | 2011-12-19 | 2012-06-13 | 中国人民解放军后勤工程学院 | Equipment for degrading phenol-containing wastewater by using reinforced water jet cavitation process |
| CN105481054A (en) * | 2015-12-30 | 2016-04-13 | 陕西师范大学 | Jet loop reactor with guiding body component |
| CN207468248U (en) * | 2017-07-31 | 2018-06-08 | 核工业理化工程研究院 | A kind of shearing Hydrodynamic cavitation generating means |
| CN111977773A (en) * | 2019-05-22 | 2020-11-24 | 刘进国 | Cavitation crusher and using method thereof |
| CN110455114A (en) * | 2019-08-09 | 2019-11-15 | 大连斯频德环境设备有限公司 | A kind of hollow rotatable spray nozzle device of centrifugal rotational flow |
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