CN101628253A - Annular composite nozzle of large-flow jet mill - Google Patents
Annular composite nozzle of large-flow jet mill Download PDFInfo
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- CN101628253A CN101628253A CN200810045593A CN200810045593A CN101628253A CN 101628253 A CN101628253 A CN 101628253A CN 200810045593 A CN200810045593 A CN 200810045593A CN 200810045593 A CN200810045593 A CN 200810045593A CN 101628253 A CN101628253 A CN 101628253A
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- jet mill
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Abstract
The invention discloses an annular composite nozzle of a large-flow jet mill. An annular nozzle is arranged outside a main nozzle; a certain inclined angle is formed between a cross section of an outlet of the annular nozzle and a cross section of an outlet of the main nozzle; the main nozzle is communicated with the annular nozzle through a connection hole; airflow enters the main nozzle and the annular nozzle at the same time to be jetted to form composite jet; and the airflow flowing out from the main nozzle is restrained by the fluid jetted from the annular nozzle so that the expansion of a jet boundary layer is slowed down, the cross section of the jet is reduced, and the attenuation of the jet speed is slowed down. Compared with the prior technical scheme, the annular composite nozzle of the large-flow jet mill improves the collision crushing effect and crushing efficiency of granular materials, and can effectively improve the energy utilization rate of the jet mill.
Description
(1) technical field:
The present invention relates to a kind of airslide disintegrating mill, particularly the annular composite nozzle of big flow.
(2) background technology
During air-flow was pulverized, the pulverizing of granule materials was to quicken through the high velocity air that nozzle forms, obtains huge kinetic energy after, after collision, friction and shear action, pulverized, so the quality of the performance of nozzle is the key in the air-flow pulverizing.
At present according to pertinent literature, the high velocity air acceleration granule materials that is formed by conventional nozzle collides pulverizing, its capacity usage ratio less than 5%, main cause is that the conventional nozzle jet is because the jet entrainment effect, gas outside a large amount of fluericses constantly is brought into, and the speed that causes jet is along journey and very fast along the jet flow section decay; Next injection stream axle center district flow velocity maximum on the cross section, this place is better to the acceleration effect of granule materials, and the granule materials that need pulverize, be outside the jet boundary layer, to enter the fluerics to quicken through the effect of entrainmenting, the granule materials that is entrainmented mainly concentrates on the outward flange of jet area, because this place is away from the axle center, air velocity is not high, and is therefore relatively poor to the acceleration effect of granule materials; Granule materials is bigger at the outer peripheral distribution area of jet area in addition, disperses, and granule materials collision probability is less relatively, thereby causes crushing effect not good enough, and the service efficiency of energy is not high.
So, in the air-flow disintegrating apparatus, how improving air-flow crushing effect and efficient, the design of nozzle is one of key issue wherein.The annular composite nozzle that patent of the present invention provides, adopt main burner that a nozzle ring is set outward, between nozzle ring outlet cross section and main burner outlet cross section certain angle of inclination is arranged, air-flow enters main burner simultaneously and nozzle ring penetrates, and forms compound jet, at this moment, the air-flow that the main burner jet goes out is subjected to the constraint that the nozzle ring jet goes out fluid, the expansion of jet boundary layer slowed down, and the jet cross section reduces, and effluxvelocity slows down.For conventional nozzle, annular composite nozzle entrainments the granule materials that enters jet area, because the inclination jet action of nozzle ring, being easy to make granule materials to enter jet axis quickens, the easier more speed that is accelerated to, improved the collision crush force between granule materials greatly, and distribution of particles concentrates on the jet axis district relatively, increased the particle collision probability.Therefore the novel annular composite nozzle of the present invention has improved granule materials collision crushing effect and crush efficiency, has also improved the capacity usage ratio that air-flow is pulverized simultaneously.
(3) summary of the invention
1, goal of the invention: patent purpose of the present invention is at conventional air breaking method weak effect, and the problem that capacity usage ratio is low by the improvement to the nozzle arrangements in the air-flow disintegrating apparatus, improves air-flow crushing effect and crush efficiency.
2, technical scheme: the technical scheme of patent of the present invention is: a kind of annular composite nozzle of large-flow jet mill mainly comprises main burner and nozzle ring; It is characterized in that being provided with outside the main burner 1 nozzle ring 2, there is certain angle of inclination in nozzle ring outlet cross section between main burner outlet cross section, and main burner 1 is communicated with by connecting hole 3 with belt nozzle 2; Air-flow enters main burner and nozzle ring simultaneously, forms compound jet.
3, beneficial effect: annular composite nozzle, utilize the nozzle ring in the nozzle to retrain as the jet flow field of pilot jet to main burner, form compound jet, the expansion of jet boundary layer slowed down, speed is along journey and very fast along the jet flow section decay, entrainment the close jet axis of the granule materials that enters jet area, be accelerated to more speed easily, improved the collision crush force between granule materials, and concentrate the jet axis district relatively because granule materials distributes, increased the particle collision probability, so adopt this annular composite nozzle, can improve granule materials crushing effect and crush efficiency greatly, also improve the capacity usage ratio that air-flow is pulverized simultaneously.
(4) description of drawings:
Be described further below in conjunction with example.Accompanying drawing is the structure chart of an embodiment of patent of the present invention.Wherein Fig. 1 is its structure chart; Fig. 2 is its A-A view.1 is that main burner, 2 is that nozzle ring, 3 is connecting hole among the figure.
(5) specific embodiment:
The specific embodiment of the present invention is shown in Figure of description.It comprises main burner 1 and nozzle ring 2, and shape nozzle 1 is fixedlyed connected with 2 of main burners, and main burner 1 is communicated with by connecting hole 3 with belt nozzle 2; Nozzle ring 2 outlet cross section main burners have certain angle between the 1 outlet cross section; Main burner is the convergent divergent nozzle; Described nozzle ring 2 is the convergent divergent nozzle; The used gas of nozzle is air, superheated steam, nitrogen, carbon dioxide.
Claims (4)
1, a kind of annular composite nozzle of large-flow jet mill is characterized in that, main burner (1) nozzle ring (2) is set outward and main burner (1) is fixedlyed connected with nozzle ring (2); Main burner (1) is communicated with by connecting hole (3) with belt nozzle (2); Between main burner (1) outlet cross section and nozzle ring (2) outlet cross section certain angle of inclination is arranged; Air-flow enters main burner (1) simultaneously and nozzle ring (2) forms compound jet.
2, the annular composite nozzle of large-flow jet mill according to claim 1 is characterized in that, main burner (1) is the convergent divergent nozzle.
3, the annular composite nozzle of large-flow jet mill according to claim 1 is characterized in that, nozzle ring (2) is the convergent divergent nozzle.
According to the annular composite nozzle of the described large-flow jet mill of claim 1, it is characterized in that 4, the used gas of nozzle is air, superheated steam, nitrogen, carbon dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810045593A CN101628253A (en) | 2008-07-16 | 2008-07-16 | Annular composite nozzle of large-flow jet mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810045593A CN101628253A (en) | 2008-07-16 | 2008-07-16 | Annular composite nozzle of large-flow jet mill |
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| Publication Number | Publication Date |
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| CN101628253A true CN101628253A (en) | 2010-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN200810045593A Pending CN101628253A (en) | 2008-07-16 | 2008-07-16 | Annular composite nozzle of large-flow jet mill |
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| CN (1) | CN101628253A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493104A (en) * | 2011-12-15 | 2012-06-13 | 江苏万工科技集团有限公司 | Double-pressure-supply main nozzle, and air supply system thereof |
| CN110090709A (en) * | 2019-03-20 | 2019-08-06 | 中国计量大学上虞高等研究院有限公司 | A kind of liquidate nozzle ring and application for dry powder nano particle disperse |
| CN110523546A (en) * | 2019-09-26 | 2019-12-03 | 广东致远新材料有限公司 | The cleaning method of fluorine ion in dynamic wave scrubber nozzle, dynamic wave scrubber and tantalum niobium hydroxide |
| CN114515474A (en) * | 2020-11-19 | 2022-05-20 | 西南科技大学 | Double-ring type gap induction nozzle for pulse dust collector |
-
2008
- 2008-07-16 CN CN200810045593A patent/CN101628253A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493104A (en) * | 2011-12-15 | 2012-06-13 | 江苏万工科技集团有限公司 | Double-pressure-supply main nozzle, and air supply system thereof |
| CN110090709A (en) * | 2019-03-20 | 2019-08-06 | 中国计量大学上虞高等研究院有限公司 | A kind of liquidate nozzle ring and application for dry powder nano particle disperse |
| CN110523546A (en) * | 2019-09-26 | 2019-12-03 | 广东致远新材料有限公司 | The cleaning method of fluorine ion in dynamic wave scrubber nozzle, dynamic wave scrubber and tantalum niobium hydroxide |
| CN114515474A (en) * | 2020-11-19 | 2022-05-20 | 西南科技大学 | Double-ring type gap induction nozzle for pulse dust collector |
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Application publication date: 20100120 |