CN201900064U - Swirl atomizing nozzle - Google Patents
Swirl atomizing nozzle Download PDFInfo
- Publication number
- CN201900064U CN201900064U CN2010205473795U CN201020547379U CN201900064U CN 201900064 U CN201900064 U CN 201900064U CN 2010205473795 U CN2010205473795 U CN 2010205473795U CN 201020547379 U CN201020547379 U CN 201020547379U CN 201900064 U CN201900064 U CN 201900064U
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Abstract
The utility model relates to a swirl atomizing nozzle which comprises an inner pipe (1), an outer pipe (2), a liquid inlet (9) communicated with the outer pipe, a gas baffle plate (3) arranged in the inner pipe, and a swirler (5) arranged between the inner pipe and the outer pipe, wherein the gas baffle plate (3) is provided with a laval hole (8); the pipe wall of the inner pipe between the gas baffle plate (3) and the swirler (5) is provided with a liquid through hole (4); the front part of the top end of the inner pipe (1) at the front part of the swirler is provided with a secondary spray hole (6); and the top end of the outer pipe (2) is open. The swirl atomizing nozzle provided by the utility model adopts a mode of gas-liquid twice atomization and has high gas-liquid speed difference in both the gas-phase region and the liquid-phase region, and excellent liquid atomization is realized. When the swirl atomizing nozzle is used as a feed nozzle of a catalytic cracking unit, the conversion rate of raw oil can be improved, the yield of lightweight oil is improved, and coke formation is reduced; and the steam usage can also be reduced, so that a reactor can operate in a wider gas quantity range, and the operational flexibility of the catalytic cracking unit is greatly improved.
Description
Technical field
The present invention relates to a kind of atomizer, more particularly, relate to a kind of vortex atomizing nozzle that can be used for the catalytic cracking unit charging.
Background technology
The utility model relates to the method and apparatus that is used for atomized liquid, and this method and apparatus can be used for the feedstock oil atomizing of heat and the reaction zone of injection fluidized catalytic cracker, with the relatively little drop size of acquisition, and uniform droplets size distribution.The feedstock oil feed nozzle is a pith of catalytic cracking unit, its effect is that the feedstock oil of catalytic cracking unit (heavy oil or residual oil or its mixture) is atomized into tiny drop, spray into good spray pattern in the riser reactor of catalytic cracking unit, with the catalyst mix reaction that enters riser reactor, improve yield of light oil to reach, reduce coke yield, improve the purpose that product distributes, prevents overcracking, can also effectively reduce the coking in the riser reactor, improve economic benefit of enterprises.The feedstock oil feed nozzle that is used for catalytic cracking unit at present has a cast, trunnion type, Y type, as the spiral blade profile of Exxon Corporation, the awl target type of Sun Oil Company and homemade single tube type nozzle.
Though the size of feedstock oil nozzle is less, price neither be very expensive, but very crucial parts, because its atomization is very big to the final product yield influence of equipment, so cause attention in many ways.The atomizing particle size that existing nozzle has in application process is bigger, and drop can not contact with catalyst granules fast fully, and feedstock oil can hot tearing turn to lighter-than-air gas for example methane, coke; The ejection speed that has is excessive, causes flowing instability and mechanical oscillation occur; The required input pressure that has is higher, and atomizing medium is more, causes energy consumption higher.
In catalytic cracking unit, the relative riser of nozzle is symmetrical arranged in twos, the angle that feedstock oil through atomizing sprays between angle and the riser bus is about 30～45 °, feedstock oil enters behind the riser at least one pair of and sprays oily stream and collide, between per share injection oil stream and riser tube wall, form negative pressuren zone, refluxing appears feedstock oil and catalyst product injection in negative pressure, thereby on the tube wall above the nozzle, form coking, and coking phenomenon can be more and more serious, formation resistance and resistance are also increasing thereupon in riser thus, influence the work of riser reactor, when serious even will stop production and carry out coke cleaning treatment.In addition,, produce oil film on the internal face of shower nozzle and have the major diameter drop at the material oil outlet two ends of shower nozzle through the feedstock oil of atomizing, thereby influence atomizing effect.
Summary of the invention
The technical problem that will solve of the present utility model provides a kind of atomized drop epigranular and tiny, atomization angle is big, the high-performance vortex atomizing nozzle of long service life.
A kind of vortex atomizing nozzle that the utility model provides, is installed in the gas baffle 3 in the interior pipe and is arranged on cyclone 5 between the inner and outer pipes pipe 1, outer tube 2, the liquid inlet 9 that is communicated with outer tube 2 in comprising; Have hole, Lavalle 8 on the described gas baffle 3, have liquid through-hole 4 on the inner pipe wall between gas baffle 3 and the cyclone 5, the interior pipe 1 top tube wall of cyclone front portion has secondary spray orifice 6, described outer tube 2 top end openings, and gas baffle 3 is a hybrid chamber 7 with the inner space on interior pipe 1 top.
The beneficial effect of the vortex atomizing nozzle that the utility model provides is:
The vortex atomizing nozzle that the utility model provides has made full use of twice atomizing effect of gas, all has higher gas-liquid speed difference in whole gas-liquid two-phase zone, realizes the better fluid atomizing.
When adopting swirl nozzle of the present utility model as the feed nozzle of catalytic cracking unit, atomizing effect is good, the size droplet diameter of ejection is even and tiny, gasification rapidly under the temperature in riser, cracking reaction is carried out at gaseous state, improve the feedstock oil conversion ratio, improve the productive rate of light oil, and reduce green coke.Because the spraying jet that nozzle produces has certain initial velocity, in the catalyst dense-phase flow of riser feed zone is moving, certain penetration power is arranged, can make spraying jet reach the riser middle part.Spraying jet has the shape of flat covering of the fan, and there is good covering in the riser cross section, reduces back-mixing.In addition, can reduce steam consumption, reactor can be operated in bigger tolerance scope, improve the operating flexibility of catalytic cracking unit greatly.
Description of drawings
The structural representation of a kind of vortex atomizing nozzle that Fig. 1 provides for the utility model;
Fig. 2 is the schematic cross-section of cyclone.
The specific embodiment
The utility model specifically is to implement like this:
The vortex atomizing nozzle that the utility model provides, pipe 1, outer tube 2 and the liquid inlet 9 that is communicated with outer tube 2 in comprising are installed in the gas baffle 3 in the interior pipe and are arranged on cyclone 5 between the inner and outer pipes; Have hole, Lavalle 8 on the described gas baffle 3, have liquid through-hole 4 on the inner pipe wall between gas baffle 3 and the cyclone 5, interior pipe 1 top of cyclone front portion has secondary spray orifice 6, interior pipe 1 top of cyclone front portion has secondary spray orifice 6, described outer tube 2 top end openings, gas baffle 3 is a hybrid chamber 7 with the inner space on interior pipe 1 top.
In the vortex atomizing nozzle that the utility model provides, one end of nozzle ejection logistics is a nozzle head, the end that gas phase and liquid phase are introduced nozzle is the bottom of nozzle, described cyclone 5 is installed in the position of close nozzle head in the inner and outer pipes annular space, and the distance on cyclone center and top is 10%～45% of an interior length of tube.
In the vortex atomizing nozzle that the utility model provides, the ratio of described diameter of inner pipe and outer tube diameter is (0.4～0.8): 1.
In the vortex atomizing nozzle that the utility model provides, the axes intersect of the center extended line of the top end opening of described outer tube 2 and interior tube head secondary spray orifice 6.
In the vortex atomizing nozzle that the utility model provides, have hole, one or more Lavalle on the described baffle plate 3, hole, described Lavalle has one or more liquid through-holes 4 for the aperture of contraction-expansion on the interior tube edge wall between described gas baffle 3 and the cyclone 5.Preferred scheme is that the number in the hole, Lavalle 8 on liquid through-hole 4 and the baffle plate of interior pipe 1 limit wall equates, wherein, hole, arbitrary Lavalle 8 all with the axes intersect of at least one liquid through-hole 4.The slightly larger in diameter of described liquid through-hole is in the hole, Lavalle, and liquid through-hole 4 is suitable to the distance of baffle plate 3 outer rims with the axial distance and the hole, Lavalle 8 at baffle plate center.
Above structure can guarantee to meet, make full use of the kinetic energy of gas by the liquid of the high-speed gas of hole, Lavalle 8 ejections and liquid through-hole ejection, thereby brings into play the effect of gas-liquid speed difference better, with the atomization of liquid.Preferred scheme evenly has hole, a plurality of Lavalle on gas baffle, make the fast radial distribution of bringing about the desired sensation more even, has reduced the influence of boundary effect, all has higher gas-liquid speed difference in whole gas-liquid two-phase zone, realizes the better fluid atomizing.
In the vortex atomizing nozzle that the utility model provides, described interior tube head and baffle plate 3 surround hybrid chamber 7, and the draw ratio of described hybrid chamber 7 is (0.5～4): 1.
In the vortex atomizing nozzle that the utility model provides, described liquid inlet 9 is connected with outer tube 2, and liquid inlet 9 is one or more, at least two liquid inlets 9 of wherein preferred setting.Cut sth. askew to the gap that enters inner and outer pipes along outer tube 2 in preferred described liquid inlet 9, promptly the liquid inlet axis is positioned on the tangent plane of outer tube 2 porch, and the angle of its axis and outer tube axis is 30～60 °.
The draw ratio of the hybrid chamber 7 that is surrounded by baffle plate 3 and interior pipe 1 leading portion is between (0.5～4): between 1, distance is excessive, can make drop coalescence again because the turbulence intensity of gas reduces, droplet size is increased and Size Distribution also inhomogeneous; And distance is too small, can make liquid oil film also not have enough time to be broken promptly to leave nozzle, is unfavorable for reducing and more uniform Size Distribution of droplet size.Experimental study shows that the draw ratio of hybrid chamber 7 is controlled at (0.5～4): more suitable between 1.
In the vortex atomizing nozzle that the utility model provides, have secondary spray orifice 6 on the interior pipe top tube wall of described cyclone front portion, the axis normal of secondary spray orifice is in the tangent plane of opening part.Interior pipe top can be semi-round ball shape or truncated cone, and preferred interior pipe top is a truncated cone, has a plurality of secondary spray orifices on the scalene cone of the frustum of a cone, and preferred 3～6, wherein the axis normal of secondary spray orifice 6 is in the scalene cone of interior pipe front end contraction section.
In the vortex atomizing nozzle that the utility model provides, described liquid inlet 9 and liquid through-hole 4 distance vertically are defined at least the outer tube diameter greater than 1.5 times.
In the vortex atomizing nozzle that the utility model provides, in the annular space of described outer tube between interior pipe cyclone 5 is housed, as shown in Figure 2, makes liquid not only have axial velocity, and have certain angle speed, have the effect of strengthening the liquid phase turbulence.
In the vortex atomizing nozzle that the utility model provides, tube head is the truncated cone shape of sealing in described, its angle of throat is that the angle of the round platform conical surface and axis is α, outer tube head is the truncated cone shape of opening, as shown in Figure 1, and the angle of throat β of outer tube head bigger 5～15 ° than the angle of throat α of interior tube head.
The axes intersect of the center extended line of outer tube 2 front openings and interior pipe front end secondary spray orifice 6 is to guarantee reaching better atomizing effect through the liquid and the gas-liquid mixture contact-impact that sprays from secondary spray orifice 6 of cyclone from the ejection of inner and outer pipes slit.
In the vortex atomizing nozzle that the utility model provides, the angle γ of the axis of described secondary spray orifice 6 and inner and outer pipes axis is 20～70 °.
Accompanying drawing 1 is a kind of preferred construction schematic diagram of the present utility model, illustrate that below in conjunction with Fig. 1 the utility model is used for the course of work of catalytic cracking unit, but therefore the utility model is not subjected to any restriction:
As seen from Figure 1, when the vortex atomizing nozzle that adopts the utility model to provide is used for the feedstock oil nozzle of catalytic cracking unit, feedstock oil to be entering annular space between inner and outer pipes than low velocity by liquid inlet 9, through buffering mix enter from liquid through-hole 4 in the hybrid chamber 7 of pipe front portion; Steam with certain pressure is introduced interior pipe 1, enter in the hybrid chamber 7 by the hole, Lavalle 8 on the gas baffle 3, steam is accelerated to supersonic speed through the hole, Lavalle, in hybrid chamber, impact the oil film that feedstock oil forms, because the speed of steam is far longer than the speed of feedstock oil, feedstock oil is by broken atomizing for the first time, vapour-liquid two-phase high velocity impact in hybrid chamber, form very strong turbulent flow, from secondary spray orifice 6 ejections of nozzle head.The liquid in inner and outer pipes gap is rotated by rotary fluid, because inside and outside differential pressure is bigger, makes liquid not only have higher swirl strength, and has higher speed, penetrate from the opening of outer tube head,, realize the atomizing second time of feedstock oil with gas-liquid mixture collision, fragmentation from 6 ejections of secondary spray orifice.
When adopting swirl nozzle of the present utility model as the feed nozzle of catalytic cracking unit, the size droplet diameter of ejection is even and tiny, can fully contact with catalyst, under the temperature in riser, feedstock oil can gasify rapidly, and cracking reaction is carried out at gaseous state, improve the productive rate of light oil, and the reduction green coke, make more raw materials oil change into value product, especially when being mixed with heavier feedstocks in the fluid catalystic cracking raw material.Because the spraying jet that nozzle produces has certain initial velocity, in the catalyst dense-phase flow of riser feed zone is moving, certain penetration power is arranged, can make spraying jet reach the riser middle part.Spraying jet has the shape of flat covering of the fan, there is good covering in the riser cross section, reduces back-mixing, and the speed of spraying jet can weaken rapidly, avoid being mapped to the riser tube wall on nozzle opposite, cause the atomizing feed nozzle of the catalytic cracking unit of the coking in the riser.In addition, can reduce steam consumption, reactor can be operated in bigger tolerance scope, improve the operating flexibility of catalytic cracking unit greatly.
Claims (10)
1. vortex atomizing nozzle, it is characterized in that comprising interior pipe (1), outer tube (2), the liquid inlet (9) that is communicated with outer tube, be installed in in the pipe gas baffle (3) and be arranged on cyclone (5) between the inner and outer pipes; Have hole, Lavalle (8) on the described gas baffle (3), have liquid through-hole (4) on the inner pipe wall between gas baffle (3) and the cyclone (5), interior pipe (1) the top tube wall of cyclone front portion has secondary spray orifice (6), described outer tube (2) top end opening, gas baffle (3) is hybrid chamber (7) with the inner space on interior pipe top.
2. according to the described vortex atomizing nozzle of claim 1, it is characterized in that described cyclone (5) is installed in the annular space space between the inner and outer pipes, the distance on cyclone center and top is 10%～45% of an interior length of tube.
3. according to claim 1 or 2 described vortex atomizing nozzles, it is characterized in that the axes intersect of the center extended line and the interior tube head secondary spray orifice (6) of described outer tube (2) top end opening.
4. according to claim 1 or 2 described vortex atomizing nozzles, it is characterized in that hole, described arbitrary Lavalle (8) all with the axes intersect of at least one liquid through-hole (4).
5. according to claim 1 or 2 described vortex atomizing nozzles, it is characterized in that the draw ratio of described hybrid chamber (7) is (0.5～4): 1.
6. according to claim 1 or 2 described vortex atomizing nozzles, it is characterized in that described liquid inlet (9) is at least two.
7. according to the described vortex atomizing nozzle of claim 6, it is characterized in that axial distance between described liquid inlet (9) and the liquid through-hole (4) is greater than 1.5 times outer tube diameter.
8. according to claim 1 or 2 described vortex atomizing nozzles, it is characterized in that described liquid inlet (9) along the cutting sth. askew of outer tube (2) to the gap that enters inner and outer pipes, its axially and angle of outer tube axis be 30～60 °.
9. according to claim 1 or 2 described vortex atomizing nozzles, it is characterized in that the angle of throat β of outer tube head is bigger 5～15 ° than the angle of throat α of interior tube head.
10. according to the described vortex atomizing nozzle of claim 1, it is characterized in that the angle γ of described secondary spray orifice (6) axis and inner and outer pipes axis is 20～70 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205473795U CN201900064U (en) | 2010-09-29 | 2010-09-29 | Swirl atomizing nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205473795U CN201900064U (en) | 2010-09-29 | 2010-09-29 | Swirl atomizing nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201900064U true CN201900064U (en) | 2011-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205473795U Expired - Lifetime CN201900064U (en) | 2010-09-29 | 2010-09-29 | Swirl atomizing nozzle |
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| Country | Link |
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| CN (1) | CN201900064U (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103070159A (en) * | 2011-10-25 | 2013-05-01 | 株式会社牧田 | Mist blower |
| CN104174521A (en) * | 2014-09-11 | 2014-12-03 | 东莞市安默琳节能环保技术有限公司 | Frost prevention nozzle used for low-temperature minimal quantity lubrication cutting |
| CN104324838A (en) * | 2014-09-26 | 2015-02-04 | 陕西师范大学 | Fluid power atomization generator |
| CN107051765A (en) * | 2017-02-13 | 2017-08-18 | 昆明奥图环保设备股份有限公司 | A kind of atomizer for suppressing dust with dry mist |
| CN107975823A (en) * | 2017-11-17 | 2018-05-01 | 中科合肥微小型燃气轮机研究院有限责任公司 | A kind of ultrasonic nozzle atomising device |
| CN109365375A (en) * | 2018-12-19 | 2019-02-22 | 广东闻扬环境科技有限公司 | Differential pressure transmitter diaphragm cleaning device |
| CN110252536A (en) * | 2019-07-17 | 2019-09-20 | 辽宁工程技术大学 | A kind of hydrocone type supersonic speed two-fluid ultra-fine atomization spray nozzle |
| CN110961046A (en) * | 2018-09-30 | 2020-04-07 | 中国石油天然气股份有限公司 | Atomizing nozzle for catalytic cracking unit reaction |
| CN110964555A (en) * | 2018-09-30 | 2020-04-07 | 中国石油天然气股份有限公司 | Atomizing nozzle for lifting pipe |
| CN110961044A (en) * | 2018-09-30 | 2020-04-07 | 中国石油天然气股份有限公司 | Nozzle for lifting pipe of catalytic cracking unit and application thereof |
| CN110961050A (en) * | 2018-09-30 | 2020-04-07 | 中国石油天然气股份有限公司 | Atomizing nozzle for lifting pipe of catalytic cracking device |
| CN111852710A (en) * | 2020-07-29 | 2020-10-30 | 无锡工艺职业技术学院 | Fuel atomizing nozzle of engine |
| CN112317152A (en) * | 2020-11-10 | 2021-02-05 | 长安大学 | Adjustable cone ring curtain presses down dirt shower nozzle |
| CN113018488A (en) * | 2021-02-25 | 2021-06-25 | 苏州清乐智能科技有限公司 | High-efficient disinfection robot |
-
2010
- 2010-09-29 CN CN2010205473795U patent/CN201900064U/en not_active Expired - Lifetime
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103070159A (en) * | 2011-10-25 | 2013-05-01 | 株式会社牧田 | Mist blower |
| CN103070159B (en) * | 2011-10-25 | 2014-04-09 | 株式会社牧田 | Mist blower |
| CN104174521A (en) * | 2014-09-11 | 2014-12-03 | 东莞市安默琳节能环保技术有限公司 | Frost prevention nozzle used for low-temperature minimal quantity lubrication cutting |
| CN104324838A (en) * | 2014-09-26 | 2015-02-04 | 陕西师范大学 | Fluid power atomization generator |
| CN107051765A (en) * | 2017-02-13 | 2017-08-18 | 昆明奥图环保设备股份有限公司 | A kind of atomizer for suppressing dust with dry mist |
| CN107975823A (en) * | 2017-11-17 | 2018-05-01 | 中科合肥微小型燃气轮机研究院有限责任公司 | A kind of ultrasonic nozzle atomising device |
| CN110961046A (en) * | 2018-09-30 | 2020-04-07 | 中国石油天然气股份有限公司 | Atomizing nozzle for catalytic cracking unit reaction |
| CN110964555A (en) * | 2018-09-30 | 2020-04-07 | 中国石油天然气股份有限公司 | Atomizing nozzle for lifting pipe |
| CN110961044A (en) * | 2018-09-30 | 2020-04-07 | 中国石油天然气股份有限公司 | Nozzle for lifting pipe of catalytic cracking unit and application thereof |
| CN110961050A (en) * | 2018-09-30 | 2020-04-07 | 中国石油天然气股份有限公司 | Atomizing nozzle for lifting pipe of catalytic cracking device |
| CN109365375A (en) * | 2018-12-19 | 2019-02-22 | 广东闻扬环境科技有限公司 | Differential pressure transmitter diaphragm cleaning device |
| CN110252536A (en) * | 2019-07-17 | 2019-09-20 | 辽宁工程技术大学 | A kind of hydrocone type supersonic speed two-fluid ultra-fine atomization spray nozzle |
| CN110252536B (en) * | 2019-07-17 | 2021-02-02 | 辽宁工程技术大学 | Siphon type supersonic speed double-fluid superfine atomizing nozzle |
| CN111852710A (en) * | 2020-07-29 | 2020-10-30 | 无锡工艺职业技术学院 | Fuel atomizing nozzle of engine |
| CN112317152A (en) * | 2020-11-10 | 2021-02-05 | 长安大学 | Adjustable cone ring curtain presses down dirt shower nozzle |
| CN113018488A (en) * | 2021-02-25 | 2021-06-25 | 苏州清乐智能科技有限公司 | High-efficient disinfection robot |
| CN113018488B (en) * | 2021-02-25 | 2023-07-14 | 苏州清乐智能科技有限公司 | High-efficient disinfection robot |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110720 |