Device for ultrasonic atomizing of liquid media
(57) Abstract:The invention relates to ultrasonic technologies in heterogeneous environments and can be used for spraying liquids. The problem solved by the invention is to create an efficient and simple device for ultrasonic atomizing of liquid media. The problem is solved by using as the base of the oscillating circuit in the positive feedback circuit of the generator and set the frequency of its oscillations of the piezoelectric element of the evaporator the liquid in acoustic contact with the sprayed liquid. 2 Il. The invention relates to ultrasonic technologies in heterogeneous environments and can find application in everyday life and in scientific research in the chemical, petrochemical, and pharmaceutical industries for spraying liquids.The task of spraying liquid media usually solved by finding the optimal shape of the tank atomizer and imposing additional impacts, such as, , . These devices are complicated to manufacture and are not efficient enough.Closest to the present invention is a device that implements the method according to and. C. N Lu, containing piezoelectric element. To improve the efficiency of the spraying frequency generator sequentially change.The disadvantage of this device is:
- the presence of additional elements for regulating the oscillation frequency of the oscillator;
the absence of feedback with the process of atomization of the liquid.The problem solved by the invention is to create an efficient and simple device for ultrasonic atomizing of liquid media.The problem is solved by using as the base of the oscillating circuit in the positive feedback circuit of the generator and set the frequency of its oscillations of the piezoelectric element of the evaporator the liquid in acoustic contact with the sprayed liquid.It is known  that the processes in heterogeneous systems (e.g., the sprayed liquid / surface evaporator) accompanied by the appearance of the surface microstructure, which correspond to the characteristic acoustic resonant frequency. The processes associated with emergent spraying (desired) components of a fluid macrostructure, change the acoustic characteristics of the surface of piezos the AMB as associated electrical oscillating circuit with changing the total resonance characteristic, depending on the process.The essence of the invention lies in the fact that the device for ultrasonic atomizing of liquid media, comprising a generator of electrical oscillations comprising an amplifying element and the base of the oscillating circuit is connected by a chain of positive feedback, and the evaporator liquid with a piezoelectric element, which is in acoustic contact with the evaporated liquid; as the base of the oscillating oscillator circuit using the piezo evaporator liquid, while the sprayed liquid is considered as an acoustic resonant circuit with characteristics that depend on the current processes, and the electric oscillation generator set joint resonance characteristics of two connected electric circuits: intrinsic piezoelectric evaporator and the equivalent electrical circuit, relevant pezopreobrazovatelem acoustic oscillatory circuit characterizing the spray.In this technical solution, the basic resonant circuit - piezo evaporative system, and the sprayed liquid (reaction medium, considered as acoustic resonant circuit) form Spasskie characteristics, and the second (the spray) has acoustic characteristics that depend on the current process. With this design, the control of the generator is a positive feedback loop, amplifying the signals characterizing the effect desired processes (namely, the preferential sputtering of the desired components of the liquid in the spray liquid on the General characteristics associated oscillator circuits. This configuration is common resonant characteristics of the device allows you to work on the characteristic frequencies of the spraying of the desired components of the solution.The described device is simple in execution, eliminating the need for frequency control, and now, since the generator is automatically set to the optimal mode of oscillation for the resonant acceleration of the process of spraying the desired fluid components.The device explained in Fig.1, where 1 is the amplifying element generator, 2 - piezo evaporative system in the positive feedback loop 3, used as a basic oscillating circuit that sets the frequency of the oscillation generator, 4 - sprayed liquid, which is in acoustic contact with pesole is 2">The device operates as follows. When the power in the generator, consisting of elements 1 and 2, connected back to the positive connection 3, there are oscillations. Electrical oscillations are converted in the piezoelectric element 2 in a standing acoustic wave, which affects the environment (liquid) 4. In the liquid 4 under the influence of the acoustic impact of the piezoelectric element 2 occurs the spraying liquid, followed by the appearance of the surface microstructure, which correspond to the characteristic acoustic resonant frequency. The processes associated with emergent spraying (desired) components of a fluid macrostructure, change the acoustic characteristics of the surface of the piezoelectric element at a characteristic resonant frequencies. The control generator is a positive feedback loop 3, amplifying the signals characterizing the impact of the desired processes in the sprayed liquid 4 on the General characteristics associated oscillator circuits.For example, a device based on these principles, the authors used for spraying essential oils of medicinal plants. Ultrafine aerosols oils obtained in this way, obl, General view of the device shown in photo 2), designed and manufactured LLP View, Novosibirsk, has significantly expand the scope of medical applications of essential oils of medicinal plants. The operation of the device at frequencies megahertz range at densities ultrasonic active power of about 1 W/cm2allows you to retrieve aerosols with a diameter of drops less than 0.5 μm. It is experimentally shown the high effectiveness of the sanitizing action of the device , . The use of fine aerosols produced from purified essential oils, and directly from the living tissues of medicinal plants by the method of resonant high-frequency ultrasonic sublimation greatly extends the range of therapeutic effects of medicinal plants, allowing lead to General quarters in accordance with the requirements of GOST for inpatient operating.Bibliography
1. A. S. N 929240, B. I. N 19, 1982, CL B 05, gr. B 17/06.2. A. S. N 929242, B. I. N 19, 1982, CL B 05, gr. B 17/06.3. A. S. N 978934, B. I. N 45, 1982, CL B 05, gr. B 17/06.4. A. S. N 460072. B. I. N 6. 1975, class B 05, gr. B 17/06.5. Chemical Physics Letters. Volume 191, number 5, 1992: "Observation of surface acoustic phonon resonances: application to the CO+O27. "Medical technology". No. 1-2, 1995, Medical news Agency, St. Petersburg. The use of essential oils for the prevention of nosocomial infections and the treatment of candidiasis; Kazarinov N. In., Muzychenko, L. M. , Tkachenko, K., Surguja A. M., Brezhnev C. N., Usov, O. M. Device for ultrasonic atomizing of liquid media, comprising a generator of electrical oscillations, consisting of the amplifying element and the base of the oscillating circuit is connected by a chain of positive feedback, and the evaporator liquid with a piezoelectric element, which is in acoustic contact with the evaporated liquid, characterized in that as the base of the oscillating circuit of the generator is used piezo evaporator liquid, forming a sprayable liquid associated oscillatory circuits, the joint resonance characteristic which sets the mode of the oscillation generator.
FIELD: apparatus for spraying or atomizing liquids or other fluent materials, particularly in medicine and sanitation for inhalation therapy, room moistening and disinfection.
SUBSTANCE: ultrasound aerosol generator comprises aerosol chamber composed of upper and lower parts and ultrasonic transducer installed in lower chamber part. Ultrasonic transducer is also used as container for working liquid. Piezoelectric ultrasound emitter is sealed in transducer bottom. Air inlet orifice provided with fan is formed in side wall or bottom of lower chamber part. Supplying device used to maintain necessary level in transducer cup is arranged in upper chamber part. Aerosol discharge channel is located above the transducer and arranged coaxial thereto. Aerosol discharge channel is formed as a tube with end located above working liquid level. Generator created aerosol particles having dimensions of 0.1 - 10 mcm.
EFFECT: possibility to obtain fine aerosol particles, provision of practically laminar aerosol flow and full discharge thereof due to recombination processes elimination, namely due to prevention of fine aerosol particles conversion into large ones by conglutination thereof.
4 cl, 1 dwg
FIELD: liquid spraying equipment, particularly with the use of ultrasound oscillations, for machinery building and combustion devices, for low-temperature and cryogenic liquid spraying, for fusible metal liquid dispersion and for aerosol distribution in medicine.
SUBSTANCE: method involves applying axisymmetric ultrasound oscillations to surface layer of the liquid in parallel to major free surface thereof. Device for above method realization includes piezoelectric ultrasonic transducer and bowl-shaped concentrator coaxial with the transducer and having varying cross-sectional thickness. In area having the highest cross-sectional thickness concentrator is rigidly connected to working pad of transducer. Concentrator has cylindrical inner surface in area having lesser cross-sectional thickness.
EFFECT: increased reliability and effectiveness of spraying system, possibility to obtain fine aerosol.
2 cl, 1 dwg
FIELD: chemical industry; agriculture; farms; country houses; production of the injectors for the liquid, the devices containing the injectors and the containers for the liquid intended for extermination of the creeping hexapods.
SUBSTANCE: the invention is pertaining to the injector for the liquid, to the container and the device for extermination of the creeping hexapods. The problem of the invention is development of the injector for the liquid, which ensures the state of the contact without the tension or loading between it and the liquid feeding component, that the contact at the redundant or incorrect pressure of the wick on the liquid releasing component should not hinder the vibrating motion of the liquid releasing component. The injector contains the body for connection with the container contacting the sputtered liquid, the liquid releasing component connected to the body for the contact with the liquid feeding component for feeding the liquid to the liquid releasing component, and the vibration drive connected with the liquid releasing component for actuation of the liquid releasing component so, that to generate the sputtered spray of the liquid. The injector contains the flexible component passing from the external perimeter of the liquid releasing component to the internal wall of the body to provide the flexible connection between the body and the liquid releasing component. At that the flexible component is located so that to ensure the stable working contact between the liquid releasing component and the liquid feeding component. The technical result of the invention is provision of the possibility of the uniform and regular feeding of the liquid to the releasing component irrespective of the operational conditions or inclination of the device during the operation.
EFFECT: the invention ensures the possibility of the uniform and regular feeding of the liquid to the liquid releasing component irrespective of operational conditions or inclination of the device during the operation.
28 cl, 21 dwg
FIELD: ventilation, wet dust collection.
SUBSTANCE: invention relates to gas-dust cleaning of air-borne emissions. The system consists of case, placed horizontally and with a cylindrical shape with a contact zone, length of one contact zone, on the left of the central part of which, in series along the axis of the case, there are at least two atomisers, while on the right part of the case, after the contact zone, with length of one contact zone, there is drip pan with a sink in the lower part of the case. In each atomiser there are connection pipes for compressed air and connection pipes for water with sealing and regulating valves, joining the connection pipes to collectors, respectively located in the pipelines carrying water and compressed air. Each of the collectors is equipped with manometers for monitoring pressure of the water and compressed air. The atomisers are in the form of acoustic atomisers for atomising liquids, and consist of case. Inside the case there is generator of acoustic oscillations in the form of a nozzle and a resonator, made in the form of concentric ring-shaped apertures, located on a plane perpendicular to the axis of the case. A ring with a conical surface is joined to the case, and serves as the nozzle for atomised liquid. The atomiser serves to form a film of liquid, covering the output of the generator, and is mounted in the case using a hollow bar with a screwed swirler at the end and a pad for mounting a ring-shaped platform, on which liquid flows out from the atomiser. The resonator has at least one extra spherical cavity, located in the wall of the ring. The spherical cavity is linked with a calibrated aperture with a ring-shaped aperture, formed by the butt end surfaces of the case and ring from the side of the conical surface. The ring is put with provision for fixed displacement along the axis of the case through a threaded connection.
EFFECT: increased effectiveness and reliability of the process of dust collection through increasing the degree of dispersion of the liquid using the atomisers.
2 cl, 2 dwg
FIELD: technological processes.
SUBSTANCE: invention is related to the method of wet dust collection and may be used in chemical, textile, food, light and other industries for purification of dusted gases. Acoustic system of gas and dust cleaning of aerial effluents contains casing, which is installed horizontally and which has cylindrical form with the contact zone in the central part, on the left of which, serially along the casing axis, at least two sprayers are installed, and in the right part of casing, after the contact zone there is drop catcher installed with the drain in the bottom part of casing. Nozzles are connected to every sprayer for compressed air and nozzles for water with stop and control valves that connect nozzles with headers that are accordingly installed in pipelines that supply water and compressed air, at that every of headers is equipped with manometers for control of water and compressed air pressure. Sprayers represent acoustic sprayers that contain casing with installed inside generator of sound oscillations of ultrasonic frequency range in the form of nozzle and annular volumetrical resonator. Casing of sprayers is made in the form of vertically installed cylindrical bushing, in the top part of which tube is installed for air supply, and tube for liquid supply is installed perpendicularly to its axis. Inside casing, coaxially to it, bushing is rigidly fixed with top and bottom flanges, at that the bottom flange is rigidly fixed in the bore made in casing. Inside bushing, coaxially to it, there is rod installed with diameter d, at the end of which annular volumetrical resonator is pressed, made in the form of cup with conical surface, and in tail part of rod fixing discs are installed that interact with internal surface of bushing. In the bottom flange there is at least one nozzle at the angle to the axis of resonator, the value of which lies in the following interval of values: 20°-40°, at that continuation of nozzle axis lies on circumference located in the middle part of resonator conical surface.
EFFECT: increase of efficiency and reliability of dust collection.
2 cl, 2 dwg
FIELD: technological processes.
SUBSTANCE: in method of liquid spraying ultrasonic oscillations of higher mode are excited in oscillating system of transducer-concentrator by introduction of ultrasonic oscillations into liquid layer. Then they are resonantly transformed into double-sided longitudinal oscillations in concentrator neutral part. Then sprayed liquid is introduced to one or two working butt ends of concentrator. Device for method implementation includes annular piezoelectric transducer and concentrator. Transducer represents annular piezoelectric cell. Concentrator includes double-staged cylindrical section and double-staged conical section installed in it. In cylindrical section internal stage has larger thickness than the external one. In conical section conical stages form deepening. Opening is provided along concentrator axis, which is connected with liquid-supplying tube by radial opening. External cylindrical surface of concentrator is rigidly connected to internal cylindrical surface of piezoelectric cell.
EFFECT: possibility to prepare fine-dispersed aerosol.
2 cl, 1 dwg
FIELD: technological processes.
SUBSTANCE: in acoustic sprayer for solutions resonator is arranged in the form of at least one spherical cavity installed in end surface of casing that faces distribution head. Spherical cavity is connected by calibration opening with clearance between vertical opening in end surface of casing and distribution head rod. In section that is perpendicular to rod axis clearance has annular section. Distribution head is arranged in the form of casing with cover in the form of truncated cones that are joined with large bases. Header in the form of cylindrical cavity is installed in the casing, and it is connected by annular channel that is formed by external cylindrical surface of hollow rod and coaxial openings of the same diameter that are accordingly arranged in cover and casing of distribution head, with at least three channels for solution outlet that evenly distributed along circumference and perpendicular to rod axis. Cut of openings is installed on conical surface of distribution head cover, the angle of incline of which determines root angle of sprayed solution torch.
EFFECT: higher spraying efficiency.
2 cl, 1 dwg
SUBSTANCE: sprayer includes case, piezo converter acting as oscillator, and spraying unit in the form of thin resilient metal rod with bent end. Bent section of the rod interacts with free surface of sprayed fluid, surface tension forces of which wet the rod section with a thin fluid layer. It connects piezo converter to sound frequency oscillator to excite rod oscillations. At certain rod oscillation frequencies the fluid layer on the rod surface is affected by vibro-wave stretching and spraying mainly close to the bent rod end.
EFFECT: simplified sprayer construction; enhanced spraying capacity and reduced power consumption.
FIELD: engines and pumps.
SUBSTANCE: proposed acoustic scrubber incorporates a housing made up of the upper and lower sections, a branch pipe to feed dusty gas, a mist eliminator furnished with a centrifugal swirler and a branch pipe to withdraw liquid from the aforesaid mist eliminator, a spraying system, plates with a vibrator and a stabiliser, a cyclic-spraying nozzle and a mud collector. The aforesaid stabiliser cells are square, while the stabilizer hs to cell width bs ratio exists in the range of hs/bs = 1.5 to 1.8. The plates are mare either perforated with the plate thickness bp to hole diameter dh ratio equal to hp/dh=0.5 to 1.5 slit-like with the plate thickness-to-slit width ratio in the range of hp/bh=0.8 to 1.5. The housing height H to housing diameter D ratio exists in the optimum range of H/D=4.0 to 6.5, while the housing diameter D to mist eliminator diameter d1 lies in the range of D/D1=1.2 to 1.25 and the housing diameter D to inlet and outlet branch pipe diameters B1 exists in the range of D/B1=2.0 to 2.5. The spraying system represents an acoustic nozzle incorporating a casing housing an ultra-sound frequency oscillation generator made up of a nozzle and an annular cavity resonator. The nozzle casing represents a vertical cylindrical sleeve with its upper part accommodating an air feed pipe. Note that a liquid feed pipe is arranged perpendicular to the aforesaid pipe, and the sleeve with top and bottom flanges is rigidly secured inside the housing and aligned with it. The aforesaid bottom flange is rigidly secured in the housing groove. The rod is arranged inside the aforesaid sleeve and aligned with it, the rod end being furnished with the aforesaid cavity resonator pressed therein and representing a taper-surface cup and the rod tail being furnished with locating plates to interact with the sleeve inner surface. The aforesaid lower flange accommodates, at least, one nozzle arranged at the angle to the cavity resonator axis varying 20°÷40°. Note here that the nozzle axis continuation lies on the circumference located at the resonator taper surface center.
EFFECT: higher efficiency and reliability provided for by increasing spraying efficiency.
FIELD: engines and pumps.
SUBSTANCE: proposed taper nozzle scrubber incorporates a housing with a dusty and a purified gas branch pipe, a nozzle spraying system, a bearing and constricting plates with an adapter arranged there between, a mist eliminator representing an adapter layer fitted between the aforesaid plates and a mud separator. Note here that the bearing plates are elastic and the aforesaid adapter arranged above the lower bearing plate is made in elastic materials and represents hollow polyethylene balls or a helical line cut on a spherical surface of the said balls. Note also that the vibrator is arranged on the said lower bearing plate. The aforesaid spraying system represents an acoustic nozzle incorporating a casing housing a cavity resonator to generate acoustic oscillations and air-and-liquid feed nozzles. The casing is made up of an upper cylindrical and lower parts jointed together by, at least, two rods, the upper part accommodating a union with cylindrical and taper aligned orifices to feed a spraying agent, for example, air. Note that the said union inside accommodates the said nozzle furnished with the central liquid feed orifice and aligned with the union, the said nozzle being rigidly locked by the locking plates interacting with the said liquid feed central orifice inner surface. The rod is arranged inside the aforesaid sleeve and aligned with it, the rod end being furnished with the aforesaid cavity resonator pressed therein and representing a taper-surface cup and the rod tail being furnished with locating plates to interact with the sleeve inner surface. The aforesaid lower flange accommodates, at least, one nozzle arranged at the angle to the cavity resonator axis varying 20°÷40°. Note here that the nozzle axis continuation lies on the circumference located at the resonator taper surface center.
EFFECT: higher efficiency and reliability provided for by increasing spraying efficiency.