CN102716827A - Gas-liquid two-phase pressure-balanced wide-angle uniformly-distributed mist nozzle - Google Patents
Gas-liquid two-phase pressure-balanced wide-angle uniformly-distributed mist nozzle Download PDFInfo
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- CN102716827A CN102716827A CN2012102365010A CN201210236501A CN102716827A CN 102716827 A CN102716827 A CN 102716827A CN 2012102365010 A CN2012102365010 A CN 2012102365010A CN 201210236501 A CN201210236501 A CN 201210236501A CN 102716827 A CN102716827 A CN 102716827A
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Abstract
The invention discloses a gas-liquid two-phase pressure-balanced wide-angle uniformly-distributed mist nozzle. The gas-liquid two-phase pressure-balanced wide-angle uniformly-distributed mist nozzle comprises a nozzle shell and a Venturi ejector, wherein the nozzle shell is provided with a liquid inlet pipe and a gas inlet pipe; the a Venturi ejector is formed by a Venturi rotating body and a spiral groove type inner core and is fixedly embedded in an inner cavity of the nozzle shell; the spiral groove type inner core is fixedly inserted in a middle cavity of the Venturi rotating body; the Venturi rotating body is provided with a ring-shaped pressure equalizing chamber which is communicated with the liquid inlet pipe; a liquid discharging ring seam is formed on the inner side of the ring-shaped pressure equalizing chamber; a ring-shaped reducing section, a ring-shaped throat pipe section and a ring-shaped divergent section are sequentially formed between the spiral groove type inner core and the Venturi rotating body from inside to outside; the ring-shaped reducing section is communicated with the gas inlet pipe; the ring-shaped throat pipe section is communicated with the liquid discharging ring seam; and the ring-shaped divergent section is communicated with the outside. The gas-liquid two-phase pressure-balanced wide-angle uniformly-distributed mist nozzle disclosed by the invention has the advantages of simple structure, good atomizing distribution uniformity, wide ejection area and the like.
Description
Technical field
The present invention relates to be applicable to the biphase gas and liquid flow atomizer in fields such as clarifying smoke, desulphurization denitration, gas cooling, spraying and fire-fighting, refer in particular to a kind of gas-liquid two-phase equilibrium wide-angle and be uniformly distributed with mist nozzle.
Technical background
Atomizer has two kinds: single liquid atomizing nozzle and gas-liquid two-phase atomizer.
The atomization mechanism of single liquid atomizing nozzle mainly is mitoschisis, and liquid penetrates from spray orifice with very high speed, and under the frictional force effect between surface tension and liquid and extraneous still air, fluid column becomes the brin of snake shape vibration, and mist formation then ruptures.The atomizing effect of single liquid atomizing nozzle is relatively poor, if the generation average diameter less than 100 microns droplet, must adopt little spray orifice, high hydraulic pressure, the problem that single liquid atomizing nozzle of this structure exists is: the aperture is prone to obstruction, and atomization quality is poor.
The gas-liquid two-phase atomizer mainly is to adopt compressed air to impact flow to improve atomization quality, reduces hydraulic pressure significantly.Because the gas-liquid two-phase atomizer has better atomization than single liquid atomizing nozzle, therefore, the gas-liquid two-phase atomizer obtains use more and more widely.
The atomization mechanism of gas-liquid two-phase atomizer mainly is membranaceous division; When gas-liquid mixed stream with quite high speed when pressure nozzle sprays, can form the film like droplet crowd of gas-in-liquid, gas expands and makes the liquid-sheet disintegration mist formation; Increase air pressure, reduce liquid measure and can further improve atomizing effect.The gas-liquid two-phase atomizer has two kinds of patterns: ejection type and gas-liquid collision type.
The required hydraulic pressure of ejection type nozzle is extremely low, can be normal pressure (ambient atmosphere pressure), only depends on high velocity air just maybe liquid be sucked in the Venturi tube in the negative pressure that Venturi tube throat produces, and makes gas-liquid mixed formation droplet.The subject matter that the ejection type nozzle exists is that atomization quality is unstable, and reason has two kinds:
The one, liquid can not suck the ejection type nozzle to be caused forming the liquid mist: according to the Diffusion Law of gas jet; When larynx mouth distance is excessive; The gas jet sectional area had been diffused into greater than the trunnion area before getting into trunnion; Trunnion becomes simple resistance to jet, thereby makes injector can not form the liquid mist by pumping liquid.In addition, flow type pump with injection gas sprays and has the air velocity lower limit.If spout gas speed is lower than lower limit, the negative pressure that is produced is not enough, liquid can't suck shower nozzle, can not form the liquid mist (referring to Wu Weifeng, Feng Quanke, to the Qingjian River, Lv Junxian.Two phase flow pattern analysis in the gas-liquid ejector.Nuclear Power Engineering.2007，28（6），34-37）。
The 2nd, the backflow effect in the mixing chamber causes and can't normally spray: be the gas-liquid mixed chamber between gas spout and Venturi tube, the outside, high-speed jet district that gas spout produces is the recirculating zone, and the recirculating zone is along with the rising of back pressure is constantly moved to the mixing chamber inlet place; When back pressure surpasses to a certain degree, serious backflow phenomenon will appear in the porch, cause ejection type nozzle operation termination (referring to Wang Houqing; Shen Chao; Wang Xiaojuan, Chen Ping Lu, Zhang Hefei.The numerical simulation of biphase gas and liquid flow injector and experimental study.Petroleum machinery.2005，33（9），21-23）。
Gas-liquid collision type nozzle mainly leans on the mutual collision between high-speed gas-liquid to produce atomizing, and gas-liquid collision type nozzle has atomizing stability preferably, but weak point is also arranged:
1, the liquid phase spout is prone to stop up.Because gas-liquid collision type nozzle is to lean on the mutual collision between high-speed gas-liquid to produce atomizing; Therefore just require the diameter of liquid phase spout very little (usually less than 1mm); Make hydrojet become very thin fluid column, so just easily under the impact of high velocity air broken mist formation (referring to Yang Lijun, Wang Wei.The research of two phase flow oil-in-water type mist-generating nozzle atomization characteristics, BJ University of Aeronautics & Astronautics's journal, 2002,28 (4), 413-416).If liquid has impurity (like wet desulphurization spray alkali lye solid particle is arranged, oil spray has grease etc.), thin spout very easily stops up.
2, the gas-liquid two-phase atomizing is not fully exerted.The collision type nozzle only has the mutual collision effect between high-speed gas-liquid, does not utilize the shearing force between the biphase gas and liquid flow.
3, the required hydraulic pressure of gas-liquid collision type nozzle is higher than the ejection type nozzle.
In order to overcome ejection type nozzle atomization quality problem of unstable; Effectively bring into play the atomizing potentiality of gas-liquid collision type nozzle simultaneously; Chinese invention patent ZL 2,009 1 0063156.3, disclose a kind of employing underspin compressed air stream, and utilize the percussion of high velocity air to fluid column; In conjunction with the shear action of high speed swirling eddy, thereby make fluid column more be prone to the broken liquid mist that forms to fluid column.Although two phase whirl heavy calibre mist nozzles have greatly improved atomizing effect, still have existence with defective:
1, required hydraulic pressure higher (usually greater than 0.2MPa).
2, because the pressure on air-flow and liquid contact surface does not wait, cause the liquid measure of each spray orifice ejection of nozzle end not wait.
3, for all jet roses, no matter be single liquid atomizing nozzle of porous or porous gas-liquid two-phase atomizer, total phenomenon that has the spraying skewness between two strands of dispersed jets, up to the present this problem is not also solved well.
Summary of the invention
The object of the invention will overcome above-mentioned technological deficiency exactly, provides good, the simple in structure and gas-liquid two-phase equilibrium wide-angle that can not stop up of a kind of distributing homogeneity that atomizes to be uniformly distributed with mist nozzle.
For realizing above-mentioned purpose; The gas-liquid two-phase equilibrium wide-angle that the present invention designed is uniformly distributed with mist nozzle; Comprise nozzle body, said nozzle body is provided with feed tube and air inlet pipe, also comprises the venturi-type eductors that is made up of venturi revolving body and spiral groove type inner core; Said venturi revolving body is set in the inner chamber that is fixed on nozzle body, and said spiral groove type inner core inserts and is fixed in the middle cavity of venturi revolving body; Said venturi revolving body is provided with ring-type and all presses the chamber, and said ring-type all presses the chamber to be connected with feed tube, and said ring-type all presses the inboard of chamber to offer the fluid circumferential weld; Form ring-type converging transition, ring-type trunnion section and the ring-type divergent segment of venturi-type eductors between said spiral groove type inner core and the venturi revolving body from the inside to the outside successively; Said ring-type converging transition communicates with air inlet pipe; Said ring-type trunnion section communicates with the fluid circumferential weld, and said ring-type divergent segment communicates with the external world.
In the technique scheme, said ring-type is all pressed the chamber to be surrounded by the cylinder inner wall of annular groove on the venturi revolving body and nozzle body and is formed.
In the technique scheme, said spiral groove type inner core comprises inboard conical section, middle double-screw bolt section and outside frustum section; Said venturi revolving body comprises inboard inversed conical drum section, middle cylinder section and outside conical cylinder section; Form the ring-type converging transition between said inboard conical section and the inboard inversed conical drum section, form ring-type trunnion section between said middle double-screw bolt section and the middle cylinder section, form the ring-type divergent segment between said outside frustum section and the outside conical cylinder section.
In the technique scheme; Said nozzle body is formed by conical cylinder section housing and cylindrical section shell combination; Said air inlet pipe is arranged on the top of conical cylinder section housing, and said venturi revolving body is set in the inner chamber that is fixed on the cylindrical section housing, and said feed tube is arranged on the sidewall of cylindrical section housing.
In the technique scheme, the axial line of said spiral groove type inner core overlaps with the axial line of air inlet pipe, vertical with the axial line of feed tube, and three's axial line is positioned at same plane.
The present invention adopts technique scheme, has following remarkable technological progress and beneficial effect:
1, venturi injection atomizing is combined with fluid dynamic rotary-cut atomizing, on the one hand, utilize the high velocity air negative pressure imbibition effect of ejection type nozzle; Effectively reduce liquid supply pressure; Utilize the negative pressure ejector action of high velocity air in venturi-type eductors, all press the liquid in the chamber to be drawn in the spiral grooves ring-type, make flow and high velocity air mixed aerosol through the feed liquor circumferential weld; Therefore required hydraulic pressure is normal pressure or low pressure, has energy-conservation effect; On the other hand, utilize the impact rotary-cut effect of gas-liquid swirl nozzle, make the atomizing of liquid more abundant, the droplet footpath of generation is littler.
2, feed tube of the present invention all communicates the chamber of pressure with ring-type; The ring-type all chamber of pressure is big section ring-shaped cavity; All press the basal area of chamber because of ring-type and be far longer than the basal area of feed liquor circumferential weld,, make liquid identical from the flow that the feed liquor circumferential weld flows into each spiral grooves so equate at the whole gas-liquid circumferential contact face upward pressure of circumferential weld import department; According to the equilibrium principle; Ring-type all presses the pressure on the full annular circumference gas-liquid contact-making surface between chamber and the feed liquor circumferential weld to equate everywhere, efficiently solves the inlet hydraulic imbalance problem, has improved the spraying uniformity.
3, the trunnion section of venturi-type eductors adopts the spiral grooves design, utilizes the high speed rotary-cut atomizing of air-flow in groove, with the flow shearing-crushing, makes the atomization of liquid, and atomizing effect is good.
4, liquid mist of the present invention is from the terminal ring-type flaring horn mouth ejection of venturi-type eductors; Bell-mouthed passage is very wide; Effectively avoided phenomenon of blocking, and the liquid mist form of ejection is the rotation umbrella, improved the atomizing uniformity in whole 360 ° of angular regions.
5, in the parts that nozzle of the present invention is formed, nozzle body, venturi revolving body and spiral groove type inner core are the circulus of circling round, and processing and fabricating is simple, and is easy for installation.
Description of drawings
Fig. 1 is uniformly distributed with the sectional structure chart of mist nozzle for a kind of gas-liquid two-phase equilibrium wide-angle;
Fig. 2 is that the A-A of Fig. 1 is to view;
Fig. 3 is the structural representation of spiral groove type inner core among Fig. 1;
Among the figure, feed tube 1; Ring-type is all pressed chamber 2; Feed liquor circumferential weld 3; Air inlet pipe 4; Nozzle body 5 (wherein: conical section housing 5.1, cylindrical section housing 5.2); Ring-type converging transition 6; Ring-type trunnion section 7; Ring-type divergent segment 8; Spiral groove type inner core 9 (wherein: inboard conical section 9.1, middle double-screw bolt section 9.2, outside frustum section 9.3); Venturi revolving body 10 (wherein: inboard inversed conical drum section 10.1, middle cylinder section 10.2, outside conical cylinder section 10.3).
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is done further detailed description:
Gas-liquid two-phase equilibrium wide-angle shown in the figure is uniformly distributed with mist nozzle; Comprise nozzle body 5; Nozzle body 5 is provided with feed tube 1 and air inlet pipe 4; Also comprise the venturi-type eductors that is made up of venturi revolving body 10 and spiral groove type inner core 9, venturi revolving body 10 is set in the inner chamber that is fixed on nozzle body 5, and spiral groove type inner core 9 inserts and is fixed in the middle cavity of venturi revolving body 10; Venturi revolving body 10 is provided with ring-type and all presses chamber 2, and ring-type all presses chamber 2 to be connected with feed tube 1, and ring-type all presses the inboard of chamber 2 to offer fluid circumferential weld 3; Form ring-type converging transition 6, ring-type trunnion section 7 and the ring-type divergent segment 8 of venturi-type eductors between spiral groove type inner core 9 and the venturi revolving body 10 from the inside to the outside successively; Ring-type converging transition 6 communicates with air inlet pipe 4; Ring-type trunnion section 7 communicates with fluid circumferential weld 3, and ring-type divergent segment 8 communicates with the external world.
Particularly, ring-type all presses chamber 2 to be surrounded by the cylinder inner wall of annular groove on the venturi revolving body 10 and nozzle body 5 to form.Spiral groove type inner core 9 comprises inboard conical section 9.1, middle double-screw bolt section 9.2 and outside frustum section 9.3; Corresponding with the three-stage structure of spiral groove type inner core 9, venturi revolving body 10 also is provided with three-stage structure, comprises inboard inversed conical drum section 10.1, middle cylinder section 10.2 and outside conical cylinder section 10.3.Form ring-type converging transition 6 between inboard conical section 9.1 and the inboard inversed conical drum section 10.1, form ring-type trunnion section 7 between middle double-screw bolt section 9.2 and the middle cylinder section 10.2, form ring-type divergent segment 8 between outside frustum section 9.3 and the outside conical cylinder section 10.3.Be distributed with spiral grooves on the outer surface of middle double-screw bolt section 9.2; Spiral grooves is all pressed between the chamber 2 with ring-type and is communicated through feed liquor circumferential weld 3, is stationary fit between spiral grooves and the venturi revolving body 10, particularly; The inwall spot welding of spiral grooves and venturi revolving body 10, structure is more stable.
In the present embodiment, the axial line of spiral groove type inner core 9 overlaps with the axial line of air inlet pipe 4, vertical with the axial line of feed tube 1, and three's axial line is positioned at same plane, so not only makes air-flow and flow comparatively unobstructed, and is convenient to machining.
In the present embodiment; Nozzle body 5 is combined by conical cylinder section housing 5.1 and cylindrical section housing 5.2; Air inlet pipe 4 is welded on the top of conical cylinder section housing 5.1, and venturi revolving body 10 is set in the inner chamber that is fixed on cylindrical section housing 5.2, and feed tube 1 is welded on the sidewall of cylindrical section housing 5.2.
Operation principle of the present invention is:
Claims (9)
1. a gas-liquid two-phase equilibrium wide-angle is uniformly distributed with mist nozzle, comprises nozzle body (5), and said nozzle body (5) is provided with feed tube (1) and air inlet pipe (4), it is characterized in that:
Also comprise the venturi-type eductors that constitutes by venturi revolving body (10) and spiral groove type inner core (9); Said venturi revolving body (10) is set in the inner chamber that is fixed on nozzle body (5), and said spiral groove type inner core (9) inserts and is fixed in the middle cavity of venturi revolving body (10);
Said venturi revolving body (10) is provided with ring-type and all presses chamber (2), and said ring-type all presses chamber (2) to be connected with feed tube (1), and said ring-type all presses the inboard of chamber (2) to offer fluid circumferential weld (3);
Form ring-type converging transition (6), ring-type trunnion section (7) and the ring-type divergent segment (8) of venturi-type eductors between said spiral groove type inner core (9) and the venturi revolving body (10) from the inside to the outside successively; Said ring-type converging transition (6) communicates with air inlet pipe (4); Said ring-type trunnion section (7) communicates with fluid circumferential weld (3), and said ring-type divergent segment (8) communicates with the external world.
2. gas-liquid two-phase equilibrium wide-angle according to claim 1 is uniformly distributed with mist nozzle, it is characterized in that: said ring-type is all pressed chamber (2) to be surrounded by the cylinder inner wall of annular groove on the venturi revolving body (10) and nozzle body (5) and is formed.
3. gas-liquid two-phase equilibrium wide-angle according to claim 1 and 2 is uniformly distributed with mist nozzle, it is characterized in that: said spiral groove type inner core (9) comprises inboard conical section (9.1), middle double-screw bolt section (9.2) and outside frustum section (9.3); Said venturi revolving body (10) comprises inboard inversed conical drum section (10.1), middle cylinder section (10.2) and outside conical cylinder section (10.3); Form ring-type converging transition (6) between said inboard conical section (9.1) and the inboard inversed conical drum section (10.1); Form ring-type trunnion section (7) in the middle of said between double-screw bolt section (9.2) and the middle cylinder section (10.2), form ring-type divergent segment (8) between said outside frustum section (9.3) and the outside conical cylinder section (10.3).
4. gas-liquid two-phase equilibrium wide-angle according to claim 1 and 2 is uniformly distributed with mist nozzle; It is characterized in that: said nozzle body (5) is combined by conical cylinder section housing (5.1) and cylindrical section housing (5.2); Said air inlet pipe (4) is arranged on the top of conical cylinder section housing (5.1); Said venturi revolving body (10) is set in the inner chamber that is fixed on cylindrical section housing (5.2), and said feed tube (1) is arranged on the sidewall of cylindrical section housing (5.2).
5. gas-liquid two-phase equilibrium wide-angle according to claim 3 is uniformly distributed with mist nozzle; It is characterized in that: said nozzle body (5) is combined by conical cylinder section housing (5.1) and cylindrical section housing (5.2); Said air inlet pipe (4) is arranged on the top of conical cylinder section housing (5.1); Said venturi revolving body (10) is set in the inner chamber that is fixed on cylindrical section housing (5.2), and said feed tube (1) is arranged on the sidewall of cylindrical section housing (5.2).
6. gas-liquid two-phase equilibrium wide-angle according to claim 1 and 2 is uniformly distributed with mist nozzle; It is characterized in that: the axial line of said spiral groove type inner core (9) overlaps with the axial line of air inlet pipe (4), vertical with the axial line of feed tube (1), and three's axial line is positioned at same plane.
7. gas-liquid two-phase equilibrium wide-angle according to claim 3 is uniformly distributed with mist nozzle; It is characterized in that: the axial line of said spiral groove type inner core (9) overlaps with the axial line of air inlet pipe (4), vertical with the axial line of feed tube (1), and three's axial line is positioned at same plane.
8. gas-liquid two-phase equilibrium wide-angle according to claim 4 is uniformly distributed with mist nozzle; It is characterized in that: the axial line of said spiral groove type inner core (9) overlaps with the axial line of air inlet pipe (4), vertical with the axial line of feed tube (1), and three's axial line is positioned at same plane.
9. gas-liquid two-phase equilibrium wide-angle according to claim 5 is uniformly distributed with mist nozzle; It is characterized in that: the axial line of said spiral groove type inner core (9) overlaps with the axial line of air inlet pipe (4), vertical with the axial line of feed tube (1), and three's axial line is positioned at same plane.
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| CN201210236501.0A CN102716827B (en) | 2012-07-10 | 2012-07-10 | Gas-liquid two-phase pressure-balanced wide-angle uniformly-distributed mist nozzle |
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| CN103447184A (en) * | 2013-09-10 | 2013-12-18 | 中国矿业大学 | Pulse water jet flow air suction atomization device |
| CN104588228A (en) * | 2015-01-06 | 2015-05-06 | 王爱娟 | Method for atomizing pure-oxygen small-molecular sheep placenta under high pressure |
| CN104947375A (en) * | 2014-03-27 | 2015-09-30 | 海尔集团公司 | Washing machine circulating filtration cleaning devices and cleaning method |
| CN105289420A (en) * | 2015-10-12 | 2016-02-03 | 神华集团有限责任公司 | Atomizing nozzle and fixed bed |
| CN106481511A (en) * | 2016-12-14 | 2017-03-08 | 李兆举 | Whirlpool can wind power generating set |
| CN107551814A (en) * | 2017-09-26 | 2018-01-09 | 辽阳博仕流体设备有限公司 | A kind of desulfurization Gas feeding low pressure stream regenerative oxidizer |
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| CN108080167A (en) * | 2018-01-30 | 2018-05-29 | 广州大学 | A kind of protrusion flow-disturbing atomising device |
| CN110465418A (en) * | 2019-09-03 | 2019-11-19 | 镇江市长江机电设备厂有限公司 | It is a kind of for being atomized the atomizer of oil purifier |
| CN111742910A (en) * | 2020-07-17 | 2020-10-09 | 唐山市会恩科技有限公司 | Rotatory atomising head of membrane type in advance |
| CN113797675A (en) * | 2021-09-08 | 2021-12-17 | 淮南中科盛联环保科技股份有限公司 | Dust suppression device and dust suppression method for urban trunk road |
| CN114658580A (en) * | 2022-03-15 | 2022-06-24 | 上海工程技术大学 | Air-entraining jet nozzle with swirl groove on head guide |
| CN114682406A (en) * | 2020-12-31 | 2022-07-01 | 大连理工大学 | Inner rotational flow umbrella-shaped spray hole sprayer |
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| CN103447184A (en) * | 2013-09-10 | 2013-12-18 | 中国矿业大学 | Pulse water jet flow air suction atomization device |
| CN104947375B (en) * | 2014-03-27 | 2019-02-22 | 青岛海尔洗衣机有限公司 | A kind of washing machine cycles filtering cleaning device and cleaning method |
| CN104947375A (en) * | 2014-03-27 | 2015-09-30 | 海尔集团公司 | Washing machine circulating filtration cleaning devices and cleaning method |
| CN104588228A (en) * | 2015-01-06 | 2015-05-06 | 王爱娟 | Method for atomizing pure-oxygen small-molecular sheep placenta under high pressure |
| CN105289420A (en) * | 2015-10-12 | 2016-02-03 | 神华集团有限责任公司 | Atomizing nozzle and fixed bed |
| CN106481511A (en) * | 2016-12-14 | 2017-03-08 | 李兆举 | Whirlpool can wind power generating set |
| CN107551814A (en) * | 2017-09-26 | 2018-01-09 | 辽阳博仕流体设备有限公司 | A kind of desulfurization Gas feeding low pressure stream regenerative oxidizer |
| CN107626463A (en) * | 2017-10-25 | 2018-01-26 | 西南交通大学 | A kind of cavitation jet washer jet and system based on active control |
| CN107626463B (en) * | 2017-10-25 | 2023-08-04 | 西南交通大学 | Cavitation jet flow cleaning nozzle and system based on active control |
| CN108080167A (en) * | 2018-01-30 | 2018-05-29 | 广州大学 | A kind of protrusion flow-disturbing atomising device |
| CN110465418A (en) * | 2019-09-03 | 2019-11-19 | 镇江市长江机电设备厂有限公司 | It is a kind of for being atomized the atomizer of oil purifier |
| CN111742910A (en) * | 2020-07-17 | 2020-10-09 | 唐山市会恩科技有限公司 | Rotatory atomising head of membrane type in advance |
| CN111742910B (en) * | 2020-07-17 | 2021-12-07 | 唐山市会恩科技有限公司 | Rotatory atomising head of membrane type in advance |
| CN114682406A (en) * | 2020-12-31 | 2022-07-01 | 大连理工大学 | Inner rotational flow umbrella-shaped spray hole sprayer |
| CN113797675A (en) * | 2021-09-08 | 2021-12-17 | 淮南中科盛联环保科技股份有限公司 | Dust suppression device and dust suppression method for urban trunk road |
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| WO2023207313A1 (en) * | 2022-04-29 | 2023-11-02 | 海南摩尔兄弟科技有限公司 | Electronic atomization device and nozzle atomization assembly thereof |
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