CN203215669U - Gas-assisted atomizing nozzle of atomization hyperviscous fluid - Google Patents
Gas-assisted atomizing nozzle of atomization hyperviscous fluid Download PDFInfo
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- CN203215669U CN203215669U CN 201220695966 CN201220695966U CN203215669U CN 203215669 U CN203215669 U CN 203215669U CN 201220695966 CN201220695966 CN 201220695966 CN 201220695966 U CN201220695966 U CN 201220695966U CN 203215669 U CN203215669 U CN 203215669U
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- 238000000889 atomisation Methods 0.000 title claims abstract description 63
- 239000012530 fluid Substances 0.000 title claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 68
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 239000011148 porous material Substances 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 14
- 239000006187 pill Substances 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 abstract description 30
- 239000007789 gas Substances 0.000 description 39
- 239000000295 fuel oil Substances 0.000 description 10
- 239000003595 mist Substances 0.000 description 10
- 238000009826 distribution Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
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- 238000012360 testing method Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 206010033307 Overweight Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
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- 239000003546 flue gas Substances 0.000 description 1
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Abstract
The utility model relates to a gas-assisted atomizing nozzle of atomization hyperviscous fluid. The gas-assisted atomizing nozzle of the atomization hyperviscous fluid comprises a nozzle, a current-limiting cone plate, a gas-liquid distributor and a locking nut. The gas-liquid distributor comprises an atomizing gas pipeline and a hyperviscous fluid pipeline, wherein the atomizing gas pipeline is placed at the center and the hyperviscous fluid pipeline is coated on the atomizing gas pipeline. The locking nut tightly compresses on the outlet end of the gas-liquid distributer in a sealing mode and the nozzle tightly compresses the current-limiting cone plate on the outlet end of the atomizing gas pipeline. A plurality of air holes are formed in the current-limiting cone plate. The utility model provides a gas assisted atomizing nozzle, strengthens mix between the gas and the liquid and effectively improves atomizing quality. When the gas-assisted atomizing nozzle of the atomization hyperviscous fluid is used for burning atomizing hyperviscous combustible liquid of a combustion device, ignition time can be greatly shortened, and when matched with a common air regulator, combustion efficiency and after-combustion degree of the combustible liquid are greatly improved.
Description
Technical field
The utility model relates to the atomizing that industry combustion apparatus such as station boiler, metallurgy, chemical industry are used atomizing of liquid fuel nozzle and other non-combustion apparatus liquid, be particularly related to the gas assisted atomization nozzle of atomizing heavy oil, residual oil and other relevant highly viscous fluid, can adapt to big flow and the big requirement of regulating ratio, after being used for combustion apparatus, can greatly reduce the discharging of NOx owing to the method that has adopted bias combustion.
Background technology
In recent years, along with the development of chemical industry deep processing, the quality that can be provided as fuel oil constantly descends, viscosity improves greatly, no matter existing oil burner nozzle is mechanical atomization or gas assisted atomization, and atomization quality all deteriorates significantly, cause the combustion instability that catches fire, the after-flame degree is low, undercapacity, serious slagging scorification, discharging severe overweights etc. need improve to adapt to actual needs to existing atomizer.
For the higher fuel oil of these viscosity, ubiquity viscosity is higher, be difficult to atomizing, and the burnt shell that generates after the pyrolysis slows down the characteristics such as evaporation of oil droplet, and make its burning have following technological difficulties: (1) is long the duration of ignition, heats up slowly, and start-up time is long; (2) incomplete combustion, over-emitting black exhaust, efficiency of combustion is low, and is less economical: the high serious environment pollution of (3) NOx discharge capacity.The key that the problems referred to above solve is the atomization process of these highly viscous fluids, for making its completing combustion, should make its rapid evaporation, and the following particle diameter of its atomized particle size 50 μ m is preferably in more than 85%, and when the following particle diameter of 20 μ m accounted for 5% left and right sides, it was stable to catch fire; For reducing the discharge capacity of NOx, should adopt advanced low nitrogen burning technology simultaneously.As the critical component in the burner, the performance of atomizer is determining the atomization quality of highly viscous fluid, is further having influence on its complete combustibility, adopts rational spout layout to form rational mist field distribution and will produce significant effect to the inhibition of NOx.Thereby develop can high-efficient atomizing highly viscous fluid, and form certain nozzle of mist field rationally and can overcome the above problems, be with a wide range of applications.
For guaranteeing the atomization quality of highly viscous fluid, existing atomizer generally adopts the form of gas assisted atomization.For gas assisted atomization nozzle, mainly contain outer mix, interior mix and in the middle of three kinds of patterns of mix mode, advantage such as that middle mix mode nozzle has is simple in structure, it is big to exert oneself, atomize, adjustable range is big is widely used in high-viscous liquid and atomizes.For middle mix type nozzle, the bump between gas-liquid and mixed process are the key factors that influences atomized particle size; Nozzle-integrated atomization angle then directly influences mist field shape and the mist field full level in burner hearth; The mist field distribution of nozzle is adopted rational arrangement can form rational Wu Chang, can improve the key technology of the completeness that burns behind the corresponding air register of cooperation after being used for combustion apparatus for complete combustibility and the low NOx combustion of tissue when being used for combustion apparatus.In order to form rational mist field distribution, being used for behind the combustion apparatus is to improve the completeness of jet combustion and make the discharging of NOx be down to floor level, need each structural factor of choose reasonable nozzle individual unit and carry out rational deployment between each unit of nozzle, finally improve performance and the reliability of nozzle.The structural factor that bump and the mixing of gas-liquid played a crucial role mainly contains the oilhole diameter, the section ratio of gas, liquid and mix aperture, oil-gas hole angle, mix aperture length etc.; Mix aperture is determining nozzle-integrated atomization angle, relevant with mist field shape with the angle of the central axis of mixed cell; Each unit of nozzle adopts rational arrangement can form rational Wu Chang, can improve completeness, the formation rational temperature field of burning behind the corresponding air register of cooperation after being used for combustion apparatus, organizes low NOx combustion.Therefore, whole atomization characteristics is the key technology of gun design after the atomization characteristics of nozzle individual unit and each cellular organization.In order to form rational mist field distribution, being used for behind the combustion apparatus is to improve the completeness of jet combustion and make the discharging of NOx be down to floor level, need each structural factor of choose reasonable nozzle individual unit and carry out rational deployment between each unit of nozzle, finally improve performance and the reliability of nozzle.
The utility model content
The technical problem that the utility model solves is: the gas assisted atomization nozzle that has designed and developed a kind of highly viscous fluid that can atomize, can the high sticking flammable liquid of high-efficient atomizing after being used for combustion apparatus, greatly improve the smooth combustion ability of burner and the after-flame degree of flammable liquid, adopt advanced low NOx combusting technology simultaneously, greatly controlled the discharge capacity of NOx.
Technical solution of the present utility model is:
A kind of gas assisted atomization nozzle of the highly viscous fluid that atomizes comprises shower nozzle 1, current limliting cone-plate 2, gas-liquid allotter 3 and locking nut 4, and its special character is:
Described gas-liquid allotter comprises the atomization gas pipeline at center and is coated on the high-viscous liquid pipeline of atomization gas pipeline periphery; Described locking nut is pressed on the port of export of gas-liquid allotter with shower nozzle sealing, and described shower nozzle is pressed on the port of export of atomization gas pipeline with the current limliting cone-plate, on the described current limliting cone-plate a plurality of pores is set,
Described shower nozzle is provided with the quantity a plurality of mixed cells consistent with pore, and described mixed cell comprises liquid hole, premix chamber, mixing section and secondary hybrid chamber, forms the viscous pill body cavity of annular between described shower nozzle and the gas-liquid allotter; The arrival end in described premix chamber is relative with the port of export of pore, and the arrival end in described liquid hole is opened on the viscous pill body cavity, and its port of export is opened on the premix chamber and towards pore; The described premix chamber port of export communicates with the secondary hybrid chamber by mixing section, the central lines of described pore, premix chamber, mixing section and secondary hybrid chamber, and the outlet of described secondary hybrid chamber is arranged on the outer face of shower nozzle.
The exit of the secondary hybrid chamber of above-mentioned mixed cell is provided with outlet section, and the diameter of described outlet section is greater than the diameter of secondary hybrid chamber, and excessively is connected by circular arc with the secondary hybrid chamber.
Its single atomization unit is characterised in that: liquid hole draw ratio L2/d2=2 ~ 5 on the current limliting cone-plate 2, pore draw ratio L1/d1=2 ~ 5, premix chamber draw ratio L5/d5=0.5 ~ 2, the axis angle α 2 of the axis in liquid hole and secondary hybrid chamber is 15 °～75 °, and secondary hybrid chamber draw ratio is L4/d4=0.6 ~ 2.
The center line angle α of the secondary hybrid chamber of mixed cell and shower nozzle is 25 °～55 °, and the center line angle β of the secondary hybrid chamber of adjacent mixed cell and shower nozzle is 25 °～55 °, and α is identical with β or do not wait.
Above-mentioned a plurality of mixed cell is evenly distributed on the shower nozzle.
Above-mentioned a plurality of mixed cell is that the center of circle becomes two circumference evenly to be distributed on the shower nozzle with the center of the cross section of shower nozzle.
Above-mentioned a plurality of mixed cell arranges at interval according to the pore size of secondary hybrid chamber.
Above-mentioned a plurality of mixed cell is one group, is evenly distributed on the shower nozzle, and angle theta is 30 ~ 60 ° between the adjacent mix aperture of mixed cell on the same group.
The quantity of mixed cell is 3～24.
The utility model beneficial effect compared with prior art is:
1, the utility model provides gas assisted atomization nozzle, strengthened the mixing between gas-liquid, effectively improved atomization quality, when gluing flammable liquid for the combustion apparatus atomizing is high, its duration of ignition can greatly be shortened, cooperate common air register, greatly improved efficiency of combustion and the after-flame degree of flammable liquid.
2, the utility model is by the placement scheme of appropriate design mixed cell, and the control heavy oil flux is realized the dense-dilute burner combustion technology of heavy oil, can make the NOx discharge capacity reduce by 16% by layout.
3, the utility model when gluing flammable liquid for the combustion apparatus atomizing is high, has been optimized the form of cutting apart flame by the placement scheme of appropriate design mixed cell, has reduced the emission level of NOx.
4, the utility model provides gas assisted atomization nozzle, the mode that adopts gas-liquid conversed bump to mix is greatly improved the energy utilized rate of atomization gas, and its gas consumption rate is low when not reducing atomization quality, reduce factory's gas consumption thereby make, saved energy consumption.
5, the utility model can be adjusted atomization angle, the diameter space distribution of atomizing oil droplet and the penetration depth of spray tip according to actual needs by the mode of changing shower nozzle or current limliting vertebral plate, satisfies the operating environment requirement to greatest extent.
Description of drawings
Fig. 1 is the gas assisted atomization nozzle arrangements schematic diagram of atomizing highly viscous fluid of the present utility model;
Fig. 2 is the arrangement form figure of atomization unit of the present utility model;
Fig. 3 is the structural representation of the single atomization unit of nozzle.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
Fig. 1 is the gas assisted atomization nozzle arrangements figure of a kind of highly viscous fluid that atomizes of the present utility model, comprise shower nozzle 1, current limliting cone-plate 2, gas-liquid allotter 3 and locking nut 4, gas-liquid allotter comprises the atomization gas pipeline at center and is coated on the high-viscous liquid pipeline of atomization gas pipeline periphery; Locking nut is pressed on the shower nozzle sealing port of export of gas-liquid allotter, shower nozzle is pressed on the current limliting cone-plate port of export of atomization gas pipeline, a plurality of pores 12 are set on the current limliting cone-plate 2, shower nozzle is provided with the quantity a plurality of mixed cells consistent with pore, mixed cell comprises liquid hole 13, premix chamber 14, mixing section 15 and secondary hybrid chamber 16, forms the viscous pill body cavity 11 of annular between shower nozzle 1 and the gas-liquid allotter 3;
The arrival end in premix chamber 14 is relative with the port of export of pore 12, and the arrival end in liquid hole 13 is opened on viscous pill body cavity 11, and its port of export is opened on premix chamber 14 and towards pore; Premix chamber 14 ports of export communicate with secondary hybrid chamber 16 by mixing section 15, the central lines of pore 12, premix chamber 14, mixing section 15 and secondary hybrid chamber 16, and the outlet of secondary hybrid chamber is arranged on the outer face of shower nozzle.The exit of the secondary hybrid chamber of mixed cell is provided with outlet section, and the diameter of outlet section is greater than the diameter of secondary hybrid chamber, and excessively is connected by circular arc with the secondary hybrid chamber.
Shower nozzle 1 and gas-liquid allotter 3 form annular atomization gas cavity, rely on sealing gasket 5 and sealing gasket 6 to seal; Current limliting cone-plate 2 relies on sealing gasket 6 to seal with the central passage that gas-liquid allotter 3 forms high-viscous liquid.Nozzle adopts contrainjection formula gas assisted atomization mode, and shower nozzle 1 and current limliting vertebral plate 2 can be changed according to actual needs.Penetration depth and the particle diameter of the dome-shaped enlarging structural adjustment nozzle by adjusting shower nozzle 1 secondary hybrid chamber distribute.
As shown in Figure 3, liquid hole draw ratio L2/d2=2 ~ 5 on the current limliting cone-plate 2, pore draw ratio L1/d1=2 ~ 5,, premix chamber draw ratio L5/d5=0.5 ~ 2, the axis angle α 2 of the axis in liquid hole and secondary hybrid chamber is 15 °～75 °, and secondary hybrid chamber draw ratio is L4/d4=0.6 ~ 2.
As the arrangement form figure of Fig. 2 atomization unit of the present utility model (being example with six and eight mixed cells respectively)
Evenly distribute: a plurality of mixed cells are evenly distributed on the shower nozzle.
Outer light interior dense type: a plurality of mixed cells are that the center of circle becomes two circumference evenly to be distributed on the shower nozzle with the center of the cross section of shower nozzle, are positioned at the aperture of the mixed cell mix aperture on the inner periphery greater than the aperture of outer ring.
Outer dense interior light type: a plurality of mixed cells are that the center of circle becomes two circumference evenly to be distributed on the shower nozzle with the center of the cross section of shower nozzle, are positioned at the aperture of the mixed cell mix aperture on the inner periphery less than the aperture of outer ring.
Circumferential deep or light distribution: a plurality of mixed cells are evenly distributed on the shower nozzle, with the size interval distribution of mix aperture.
Cut apart flame scheme (three cut apart line style): a plurality of mixed cells are one group, are evenly distributed on the shower nozzle, and angle theta is 30 ~ 60 ° between the adjacent mix aperture of mixed cell on the same group.
The atomizing highly viscous fluid gas assisted atomization nozzle operation the time, atomization gas is entered by gas-liquid allotter 3, enters in the shower nozzle premix chamber via current limliting vertebral plate 2; Liquid is entered in the liquid collecting cavity by the annular circular hole of gas-liquid allotter 3, liquid hole by shower nozzle 1 enters in the shower nozzle premix chamber and mixes with the atomization gas bump then, clashes into mixed gas-liquid mixture and sprays from the dome-shaped secondary hybrid chamber of shower nozzle 1 after via the mixing section of shower nozzle.
Nozzle adopts gas assisted atomization form, inner is that contrainjection formula structure, reinforcement gas-liquid blending reach and effectively utilize gas energy, the secondary hybrid chamber increases the dome-shaped structure, further strengthens atomizing, reduces liquid-drop diameter, controls secondary hybrid chamber jet velocity simultaneously.The gas-liquid supply of nozzle arranges gas-liquid allotter and guarantees circumferentially liquid stream supply uniformly, and pipe is the atomization gas pipe in the gas-liquid allotter, and the secondary hybrid chamber arranges the current limliting cone-plate, enlarges the adjustable range of gas-liquid, prevents that liquid stream anti-channeling is in gas.
The gas assisted atomization nozzle of atomizing highly viscous fluid of the present utility model, affiliated nozzle adopts isolating construction, and nozzle body is independent fully, by adjusting the size of current limliting cone-plate, realizes the control to gas-liquid impingement and mixing intensity; Shower nozzle secondary hybrid chamber adopts the dome-shaped structure, can adjust secondary hybrid chamber speed and the penetration depth of nozzle by adjusting shower nozzle secondary hybrid chamber, and then can adapt to corresponding air register, and air is rationally mixed with high-viscous liquid.Set up the rational temperature field when this nozzle can guarantee flammable liquid completing combustion when being used for combustion apparatus, reduce the content of NOx in the flue gas; Nozzle adopts multiunit form, cuts apart flame, big flame is divided into several flammules, increases the flame area of dissipation, improves cooling condition, reduces flame temperature, reduces the growing amount of NOx.
The gas assisted atomization nozzle of atomizing highly viscous fluid of the present utility model, described nozzle is made up of shower nozzle and current limliting cone-plate, nozzle adopts the reverse spray type structure, spray after improving flow velocity through the current limliting cone-plate after atomization gas enters from central passage, flammable liquid mixes by circumferentially entering with the reverse bump of atomization gas, strong energy exchange and momentum-exchange take place, biphase gas and liquid flow fully mixes in mix aperture, form uniform two phase flow, dome-shaped structure through nozzle secondary hybrid chamber, form the local eddy currents district, strengthening turbulent flow mixes, the further expanse of gas-liquid mixture simultaneously forms very thin hollow vertebra shape mist field from nozzle ejection back.
The gas assisted atomization nozzle of atomizing highly viscous fluid of the present utility model, can reach 380～400cSt, density to viscosity when being used for the heavy oil atomizing is that 0.955～0.995 heavy oil can well atomize.Heavy oil pressure is that 0.4～1.0Mpa, heavy oil flux are that 800kg/h, gas consumption rate are 6% o'clock, and average Suo Taier diameter is 60 μ m.
Adopt the gas assisted atomization nozzle of atomizing highly viscous fluid of the present utility model to carry out cold test, carried out hot test at a reduced scale cun simulator stand when being used for combusting heavy oil, combustion efficiency is good, can steady in a long-termly move, and the discharge capacity control of NOx is in 280mg/Nm3.
The know-why that the utility model adopts: nozzle adopts structure, the shower nozzle secondary hybrid chamber of contrary spray pattern to increase dome-shaped structure, guaranteed the distribution of mist field when strengthening atomizing, when for combustion apparatus with after air register adapts to accordingly, can form the rational temperature field and then reduce the NOx value of discharging; Nozzle adopts the form that multiple-unit is arranged simultaneously, adopts the flame cutting techniques to increase flame front, improves cooling condition, reduces flame temperature, reduces NOx and generates; Nozzle material adopts wear heat-resistant steel, effectively improves corrosion resistance and the wearability of product.
Claims (9)
1. the gas assisted atomization nozzle of the highly viscous fluid that atomizes comprises shower nozzle (1), current limliting cone-plate (2), gas-liquid allotter (3) and locking nut (4), it is characterized in that:
Described gas-liquid allotter comprises the atomization gas pipeline at center and is coated on the high-viscous liquid pipeline of atomization gas pipeline periphery; Described locking nut is pressed on the port of export of gas-liquid allotter with shower nozzle sealing, and described shower nozzle is pressed on the port of export of atomization gas pipeline with the current limliting cone-plate, on the described current limliting cone-plate a plurality of pores is set,
Described shower nozzle is provided with the quantity a plurality of mixed cells consistent with pore, and described mixed cell comprises liquid hole, premix chamber, mixing section and secondary hybrid chamber, forms the viscous pill body cavity of annular between described shower nozzle and the gas-liquid allotter; The arrival end in described premix chamber is relative with the port of export of pore, and the arrival end in described liquid hole is opened on the viscous pill body cavity, and its port of export is opened on the premix chamber and towards pore; The described premix chamber port of export communicates with the secondary hybrid chamber by mixing section, the central lines of described pore, premix chamber, mixing section and secondary hybrid chamber, and the outlet of described secondary hybrid chamber is arranged on the outer face of shower nozzle.
2. the gas assisted atomization nozzle of atomizing highly viscous fluid according to claim 1, it is characterized in that: the exit of the secondary hybrid chamber of described mixed cell is provided with outlet section, the diameter of described outlet section is greater than the diameter of secondary hybrid chamber, and excessively is connected by circular arc with the secondary hybrid chamber.
3. the gas assisted atomization nozzle of atomizing highly viscous fluid according to claim 1 and 2, it is characterized in that: liquid hole draw ratio L2/d2=2～5 on the current limliting cone-plate (2), pore draw ratio L1/d1=2～5, premix chamber draw ratio L5/d5=0.5～2,, the axis angle α 2 of the axis in liquid hole and secondary hybrid chamber is 15 °～75 °, secondary hybrid chamber draw ratio is L4/d4=0.6～2.
4. the gas assisted atomization nozzle of atomizing highly viscous fluid according to claim 3, it is characterized in that: the center line angle α of the secondary hybrid chamber of mixed cell and shower nozzle is 25 °～55 °, the center line angle β of the secondary hybrid chamber of adjacent mixed cell and shower nozzle is 25 °～55 °, and α is identical with β or do not wait.
5. the gas assisted atomization nozzle of atomizing highly viscous fluid according to claim 4, it is characterized in that: described a plurality of mixed cells are evenly distributed on the shower nozzle.
6. the gas assisted atomization nozzle of atomizing highly viscous fluid according to claim 4 is characterized in that: described a plurality of mixed cells are that the center of circle becomes two circumference evenly to be distributed on the shower nozzle with the center of the cross section of shower nozzle.
7. the gas assisted atomization nozzle of atomizing highly viscous fluid according to claim 4, it is characterized in that: described a plurality of mixed cells arrange at interval according to the pore size of secondary hybrid chamber.
8. the gas assisted atomization nozzle of atomizing highly viscous fluid according to claim 4, it is characterized in that: described a plurality of mixed cells are one group, are evenly distributed on the shower nozzle, angle theta is 30～60 ° between the adjacent mix aperture of mixed cell on the same group.
9. the gas assisted atomization nozzle of atomizing highly viscous fluid according to claim 3, it is characterized in that: the quantity of mixed cell is 3～24.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220695966 CN203215669U (en) | 2012-12-15 | 2012-12-15 | Gas-assisted atomizing nozzle of atomization hyperviscous fluid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220695966 CN203215669U (en) | 2012-12-15 | 2012-12-15 | Gas-assisted atomizing nozzle of atomization hyperviscous fluid |
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| CN203215669U true CN203215669U (en) | 2013-09-25 |
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| CN 201220695966 Withdrawn - After Issue CN203215669U (en) | 2012-12-15 | 2012-12-15 | Gas-assisted atomizing nozzle of atomization hyperviscous fluid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115359A (en) * | 2012-12-15 | 2013-05-22 | 中国航天科技集团公司第六研究院第十一研究所 | Gas-assisted atomizing nozzle of atomization hyperviscous fluid |
-
2012
- 2012-12-15 CN CN 201220695966 patent/CN203215669U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115359A (en) * | 2012-12-15 | 2013-05-22 | 中国航天科技集团公司第六研究院第十一研究所 | Gas-assisted atomizing nozzle of atomization hyperviscous fluid |
| CN103115359B (en) * | 2012-12-15 | 2015-04-08 | 中国航天科技集团公司第六研究院第十一研究所 | Gas-assisted atomizing nozzle of atomization hyperviscous fluid |
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Granted publication date: 20130925 Effective date of abandoning: 20150408 |
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