CN101381618B - Atomizing nozzle for feeding raw material in catalytic cracking - Google Patents
Atomizing nozzle for feeding raw material in catalytic cracking Download PDFInfo
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- CN101381618B CN101381618B CN2008101719083A CN200810171908A CN101381618B CN 101381618 B CN101381618 B CN 101381618B CN 2008101719083 A CN2008101719083 A CN 2008101719083A CN 200810171908 A CN200810171908 A CN 200810171908A CN 101381618 B CN101381618 B CN 101381618B
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- 238000000889 atomisation Methods 0.000 claims abstract description 48
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 238000004523 catalytic cracking Methods 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 239000007921 spray Substances 0.000 claims abstract description 7
- 230000001012 protector Effects 0.000 claims description 21
- 239000000443 aerosol Substances 0.000 claims description 10
- 230000003139 buffering effect Effects 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 10
- 244000309464 bull Species 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 9
- 239000002245 particle Substances 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000013467 fragmentation Methods 0.000 description 5
- 238000006062 fragmentation reaction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- 230000005514 two-phase flow Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000010517 secondary reaction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The invention relates to a catalytic cracking feeding atomized spray nozzle, which is applied to a catalytic cracking device in an oil refinery. The nozzle consists of a first-level atomizing steam inlet, a raw material inlet, a shell, a spiral atomizing steam generator, a steam spiral distribution groove, a buffer steam-liquid mixing and atomizing cavity, a second-level atomization switching nozzle, a second-level atomization area shell, a second-level steam inlet, a second-level steam spiral generator, a steam spiral distribution groove, a spray head, a spray opening, an antiwear protective device and the like. The nozzle has the advantages that atomized grains are uniform and fine, the average grain diameter is small, the number of large grains of which the grain diameter is three to four times than the average grain diameter is small, the operating flexibility is good, the atomized shape is more suitable to improve the distribution requirement of the pipe reactor, the pressure drop is low, the steam consumption is less, the abrasion resistance is good, and the long-period operation is ensured; more importantly, the product distribution can be improved, the yield of the total liquid is improved, and the yield of the light products is improved.
Description
Technical field
The present invention relates to the petroleum refining technology field, be specifically related to a kind of atomizing feed nozzle that is used for refinery catalytic cracking unit.
Background technology
The effect of atomizing nozzle for feeding raw material in catalytic cracking is with the raw material of catalytic cracking unit (heavy oil or residual oil, slurry oil, recycle stock or its mixture), assisting down of atomizing steam, atomizing sprays into riser reactor for fine small-particle, raw material is finished vaporize when contacting with catalyzer and is carried out cracking reaction.This is the process of a mass-and heat-transfer, so atomizing particle is thin more more little, size distribution is narrow more, easy more this process of finishing.Along with the development of oil refining process, for adapting to " three is fast " i.e. requirement of " rapid reaction, sharp separation, draw fast " technology.Requirement to atomizing nozzle is also more and more higher, and promptly atomizing particle is thin more more little, and size distribution is narrow as much as possible; And require spouting velocity low as much as possible, thus reduce the fragmentation of dispersed jet to catalyzer, reduce the vibrations that dispersed jet brings, reach the purpose that reduces catalyst attrition.Must guarantee that also nozzle wear is little, guarantee the requirement of long period (in the past for a year and a half is an one-period, requiring now is 3 years) safe operation.
After entering the nineties in last century, external oil company has strengthened the research dynamics for feed nozzle, Mobil and Kellog company began the development and research of the novel atomizing feed nozzle of charging in nineteen ninety, in a kind of novel feed nozzle Atomax of exploitation in 1994; Uop Inc. develops a kind of novel feed nozzle Optimix in nineteen ninety-five; These nozzles have adopted different separately steam distribution structures and different spout forms at its hybrid chamber, and its atomizing median size is about 60 μ m; Shell company developed a kind of novel feed nozzle in 1998, and applied for patent of invention 98192423.3 in China, this nozzle is a kind of feed nozzle of exterior mixing, and steam mixes at the spout place with stock oil in this nozzle, utilizes the high speed drive stock oil of steam to spray from spout; Above-mentioned nozzle can produce the spraying jet of the required flat fan of Catalytic processes, becomes atomized feed nozzle of new generation.
Present domestic like product, the atomizing median size mostly is (60 μ m-80 μ m), few accomplishing (40 μ m-50 μ m).Since great vapour-liquid two-phase velocity contrast, thus reach the effect of tearing with broken liquid, so the speed of vapour phase is very big, even some surpasses velocity of sound to reach, energy consumption is big, and vibrations are big, and fluctuation is greatly.If do not reach this speed, nozzle promptly can not reach atomizing effect, and effect sharply descends, and this certainly will influence turndown ratio, simultaneously because speed is very serious to the fragmentation of catalyzer greatly, influences the index of single agent consumption.
Summary of the invention
The objective of the invention is to: 1) provide a kind of and can produce super-fine atomization particulate atomizing nozzle; 2) suitably reduce ejiction opening speed, thereby reduce fragmentation catalyzer; 3) design outlet protector reduces even avoids the wearing and tearing of ejiction opening; 4) wide-angle multilayer atomized feed is more suitable for the reaction requirement of riser reactor.
The objective of the invention is to be achieved through the following technical solutions.
A kind of atomizing nozzle for feeding raw material in catalytic cracking comprises compositions such as the import of one-level atomizing steam, material inlet, shell, spiral atomizing steam maker, steam spiral slot, the buffering vapour-liquid mixed aerosol chamber of one-level range of atomization, the secondary atomizing nozzle that changes the secondary range of atomization over to, secondary range of atomization housing, second steam import, second steam spiral maker, steam spiral slot, shower nozzle, ejiction opening, anti-wear protector.
The front portion of spiral atomizing steam maker is the narrow steam spiral slot that distributes with lead angle γ and helical pitch L, and it can be that successive also can be a sectional.
The steam spiral slot can be a single head, also can be bull.
On the pipe section of spiral atomizing steam maker, along the axis direction narrow thin steam spiral slot of (1-5) multistage that can distribute.
Narrow thin steam spiral slot lead angle γ=(5 °-60 °).
Narrow thin steam helix lead L=(0.1D-8D).D is a spiral atomizing steam maker core pipe diameter.
Narrow thin steam spiral slot groove width is: (0.5mm-10mm).
Narrow thin steam spiral fluted area sum and spiral atomizing steam maker core tube section are long-pending than between (5%-50%).
Spiral atomizing steam maker top has (2-30) individual minute aperture on the plane perpendicular to axis.
The axis of the minute aperture at spiral atomizing steam maker top is parallel with the axis of spiral atomizing steam maker.
The diameter d of the minute aperture at the top of spiral atomizing steam maker=(0.2mm-5mm).
Spiral atomizing steam maker core pipe and one-level atomizing outer tube 3 diameters than between (10%-80%).
The nozzle that changes secondary atomizing over to for a plurality of oblique narrow groove of the angled α of secondary range of atomization outer tube axis, α=(5 °-80 °).
The nozzle that changes secondary atomizing over to can be that (2-20) is individual along the secondary range of atomization outer tube 8 axis oblique narrow groove that distributes, and oblique narrow well width is (0.5mm-10mm).
The ratio of oblique narrow groove area sum and one-level atomizing outer tube sectional area that changes the nozzle of secondary atomizing over to is (10%-90%).
The front portion of spiral atomizing steam maker is the narrow thin spiral slot that distributes with lead angle β and helical pitch M, and it can be that successive also can be a sectional.
Spiral slot can be a single head, also can be bull.
On the pipe section of spiral atomizing steam maker, along the axis direction narrow thin steam spiral slot of (1-5) multistage that can distribute.
Narrow thin steam spiral slot lead angle β=(5 °-60 °).
Narrow thin its helical pitch of steam spiral slot M=(0.1B-8B).B is a second steam spiral maker core pipe diameter.
Narrow thin steam spiral fluted groove width is: (0.5mm-10mm).
Narrow thin steam spiral fluted area sum and second steam spiral maker core tube section are long-pending than between (5%-50%).
Have (2-30) individual minute aperture on the plane of top perpendicular to axis of spiral atomizing steam maker.
The axis of the minute aperture at the top of spiral atomizing steam maker is parallel with the axis of spiral atomizing steam maker.
The diameter d of the minute aperture at the top of spiral atomizing steam maker=(0.2mm-5mm).
The diameter ratio of deuterostrophies atomizing steam maker core pipe and secondary range of atomization outer tube 8 is between (10%-80%).
Distance between spiral atomizing steam maker top and the ejiction opening is that (0-5) is doubly to the diameter of secondary range of atomization outer tube.
Shower nozzle can be a spheric, also can be elliposoidal, also can be quadrate.
Ejiction opening can be 2n, n be positive integer as 1,2,3 ...
Ejiction opening is shaped as leg-of-mutton, or segmental.
Ejiction opening is long and narrow, and long-width ratio is (3-10).
The drift angle of ejiction opening is (20 °-150 °), and width is δ=(1mm-10mm).
Ejiction opening is to arrange at an angle, and angle is (5 °-30 °).
Angle between the axis of ejiction opening drift angle medullary ray and secondary range of atomization outer tube is (0 °-30 °).
Angle between material inlet and the one-level atomizing outer tube is (10 °-150 °).
Angle between one-level atomizing outer tube and the buffering vapour-liquid mixed aerosol chamber is (30 °-150 °).
Diameter ratio between buffering vapour-liquid mixed aerosol chamber and the secondary range of atomization outer tube is between (10%-80%).
Anti-wear protector is trapezoidal on horizontal section.
Anti-wear protector is trapezoidal on vertical section.
Anti-wear protector horizontal plane drift angle is (30 °-165 °).
Anti-wear protector vertical surface drift angle is (10 °-45 °).
Distance between anti-wear protector and the ejiction opening 12 is: (0.5-10) Bei ejiction opening wall thickness.
The present invention is to provide the internal mixing type atomizer that a kind of novel multistage repeatedly atomizes, has special gas distributor in its hybrid chamber inside, by this gas distributor, gas, liquid two-phase in hybrid chamber with mode preferably contact, fragmentation, can reasonably utilize the energy of atomizing steam, steam needn't have very big speed, when passing through the sparger of this particular design, steam produces very little pressure drop, just can form even and fine stream-liquid two-phase flow in that the nozzle hybrid chamber is inner, vapour phase is present among the liquid phase with the form of small bubbles; The even and fine stream-liquid two-phase flow that in hybrid chamber, forms; Ejection section at nozzle has several long and narrow spouts.Quicken ejection by spout, the vapour-liquid two-phase produces very large shearing in very little zone, makes drop more tiny; Simultaneously because the pressure release behind the ejiction opening, bubble volume expands rapidly (explosion) in the biphase gas and liquid flow, further refinement the particle diameter of drop.And this nozzle operates steadily, and can not produce pulsation.Because special gas distributor can reduce steam consumption, makes steam consumption change in (0.1%-5%) WT according to different operating modes.
Because the design of spout place has unique antiwear device, thereby has guaranteed the requirement (3 years) of long-term operation, and, reach the quick response effect because the outlet shape makes jet shape more can meet the requirement of riser reactor.Reduce secondary reaction, reduce dry gas and coke yield, finally realize improving the purpose that total liquid receives, and make that wherein the light constituent productive rate of high added value improves, have good economic worth.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2, Fig. 3 are the structural representation of spiral atomizing steam maker 5 of the present invention;
Fig. 4 is that spiral atomizing steam maker 5 top minute apertures of the present invention are arranged synoptic diagram;
Fig. 5, Fig. 6 are the structural representation of second steam spiral maker 10 of the present invention;
Fig. 7 is that deuterostrophies atomizing steam maker 10 top minute apertures of the present invention are arranged synoptic diagram;
Fig. 8, Fig. 9, Figure 10, Figure 11 are shower nozzle 11, ejiction opening 12 structural representations;
Figure 12, Figure 13 are anti-wear protector 15 structural representations.
Among the figure: 1, one-level atomizing steam import, 2, material inlet, 3, one-level atomizing outer tube; 4, steam spiral slot, 5, spiral atomizing steam maker, 6, buffering vapour-liquid mixed aerosol chamber; 7, secondary atomizing nozzle; 8, secondary range of atomization outer tube, 9, the steam spiral slot, 10, second steam spiral maker; 11, shower nozzle; 12, ejiction opening, 13,14, the second steam import, 15, anti-wear protector.
Embodiment
As shown in Figure 1, the present invention is by one-level atomizing steam import 1, material inlet 2; body skin 3, spiral atomizing steam maker 5, steam spiral distributing slot 4; buffering vapour-liquid mixed aerosol chamber 6 changes the nozzle 7 that secondary atomizes over to, secondary range of atomization housing 8; second steam import 14; second steam spiral maker 10, steam spiral distributing slot 9, shower nozzle 11; ejiction opening 12, anti-wear protector 15 compositions such as grade.
As Fig. 2, Fig. 3, shown in Figure 4, the front portion of spiral atomizing steam maker 5 is the narrow thin spiral slot 4 that distributes with lead angle γ and helical pitch L, it can be that successive also can be a sectional.Spiral slot 4 can be a single head, also can be bull.On the pipe section of spiral atomizing steam maker 5, along the axis direction narrow thin spiral slot 4 of (1-5) multistage that can distribute.Narrow thin spiral slot 4 lead angle γ=(5 °-60 °).Narrow thin spiral slot 4 its helical pitch L=(0.1D-8D).D is spiral atomizing steam maker 5 core pipe diameters.Narrow thin spiral slot 4 groove widths are: (0.5mm-10mm).The ratio that the area sum of narrow thin spiral slot 4 and spiral atomizing steam maker 5 core tube sections amass is between (5%-50%).Have (2-30) individual minute aperture on the plane of top perpendicular to axis of spiral atomizing steam maker 5.The axis of the minute aperture at the top of spiral atomizing steam maker 5 is parallel with the axis of spiral atomizing steam maker 5.The diameter d of the minute aperture at the top of spiral atomizing steam maker 5=(0.2mm-5mm).Spiral atomizing steam maker 5 core pipes and one-level atomizing outer tube 3 diameters ratio are between (10%-80%).
As Fig. 5, Fig. 6, shown in Figure 7, the front portion of spiral atomizing steam maker 10 is the narrow thin spiral slot 9 that distributes with lead angle β and helical pitch M, and it can be that successive also can be a sectional.Spiral slot 9 can be a single head, also can be bull.On the pipe section of spiral atomizing steam maker 10, along the axis direction narrow thin spiral slot 9 of (1-5) multistage that can distribute.Narrow thin spiral slot 9 lead angle β=(5 °-60 °).Narrow thin spiral slot 9 its helical pitch M=(0.1B-8B).B is second steam spiral maker 10 core pipe diameters.Narrow thin spiral slot 9 groove widths are: (0.5mm-10mm).The ratio that the area sum of narrow thin spiral slot 9 and second steam spiral maker 10 core tube sections amass is between (5%-50%).Have a plurality of (2-30) minute aperture on the plane of top perpendicular to axis of spiral atomizing steam maker 10.The axis of the minute aperture at the top of spiral atomizing steam maker 10 is parallel with the axis of spiral atomizing steam maker 10.The diameter d of the minute aperture at the top of spiral atomizing steam maker 10=(0.2mm-5mm).The diameter ratio of deuterostrophies atomizing steam maker 10 core pipes and secondary range of atomization outer tube 8 is between (10%-80%).The top of spiral atomizing steam maker 10 and the distance between the ejiction opening 12 are the diameter of (0-5) secondary range of atomization outer tube 8 doubly.
As Fig. 8, Fig. 9, Figure 10, shown in Figure 11, shower nozzle 11 can be spheric, also can be elliposoidal, also can be quadrate.Ejiction opening 12 can be 2n, and n ∈ (positive integer is as 1,2, and 3 ...). ejiction opening 12 is shaped as leg-of-mutton, or segmental.Ejiction opening 12 is long and narrow, and long-width ratio is (3-10).The drift angle of ejiction opening 12 is (20 °-150 °), and width is δ=(1mm-10mm).Ejiction opening 12 is to arrange at an angle, and angle is (5 °-30 °).Angle between the axis of ejiction opening 12 drift angle medullary rays and secondary range of atomization outer tube 8 is (0 °-30 °).
As shown in Figure 12 and Figure 13, anti-wear protector 15 is trapezoidal on horizontal section.Anti-wear protector 15 is trapezoidal on vertical section.Anti-wear protector 15 horizontal plane drift angles are (30 °-165 °).Anti-wear protector 15 vertical surface drift angles are (10 °-45 °).Distance between anti-wear protector 15 and the ejiction opening 12 is: (0.5-10) wall thickness of Bei ejiction opening 12.
The length of nozzle and outer length of tube need determine that determine outer tube diameter according to treatment capacity, general requirement nozzle one-level range of atomization stock oil flow rate control is at (5m/s-10m/s) according to field condition.
In the one-level range of atomization, atomizing steam enters steam spiral maker 5 by import 1, by spiral steam distribution groove 4 enter between shell 3 and 5 the core pipe annular space with mix by the 2 stock oils atomizings that enter, on spiral steam distribution groove 4, all there is steam stock oil to be carried out fragmentation everywhere with a certain design angle, tear, shear, and under the suction function of vapour-liquid pressure and gravity and secondary range of atomization, move to unhurried current vapour-liquid hybrid chamber 6, enter the secondary range of atomization by ejiction opening 7 echelons, steam enters from 14 in the secondary range of atomization, steam sprays into annular space between secondary range of atomization outer tube 8 and the steam spiral producer 10 core pipes through spiral distributing slot 9, making progress along Cheng Fang, steam is sheared stream-liquid two-phase flow everywhere, tear up, broken, make the further refinement of particle, and move to ejiction opening, ejiction opening 12 ejections on shower nozzle, shearing through ejiction opening, enter riser reactor, because the rapid drawdown of riser tube internal pressure makes the unexpected explosion that increases severely of small bubbles volume in the two phase flow make grain refine and collide with catalyzer, shearing is finished last atomizing and is formed fine mist at catalyst surface.Finish whole atomization process, form superfine particle (median size 20 μ m-40 μ m).
[0066] as can be seen by above argumentation, the present invention is in the one-level range of atomization, the one-level vapour generator, the unhurried current range of atomization enters the ejiction opening of secondary range of atomization, secondary range of atomization vapour generator, ejiction opening and antiwear device all have original design concept, like this, and under very little pressure drop, just can form all thin stream-liquid two-phase flow in hybrid chamber, refinement is even more to make atomizing particle; Because the spiral air distribution generator can make macrobead to central motion, under the effect of center minute aperture steam, refinement once more, thus reduce oarse-grained existence greatly; Utilize the combination of pressure atomization, effervescent atomization principle.Simultaneously because the design of ejiction opening makes spraying jet reach the requirement of riser reactor to feed nozzle.And can accomplish to guarantee the requirement of long period safety operation.Can also reduce the consumption of atomizing steam, be more suitable in now to environmental requirement (steam consumption can be controlled in (0.3%-5%) WT, also can change with requiring).
Claims (10)
1. atomizing nozzle for feeding raw material in catalytic cracking, comprise one-level range of atomization and secondary range of atomization, it is characterized in that: described one-level range of atomization is an agent structure with spiral atomizing steam maker (5), the skin of spiral atomizing steam maker (5) is surrounded by one-level atomizing outer tube (3), the rear end of spiral atomizing steam maker (5) connects one-level atomizing steam import (1), the fore portion of spiral atomizing steam maker (5) is furnished with steam spiral slot (4), a plurality of minute apertures are arranged at spiral atomizing steam maker (5) top, form the combination distribution of atomizing steam with narrow thin steam spiral slot (4), spiral atomizing steam maker (5) top, have a plurality of minute apertures on the plane perpendicular to axis, the axis of spiral atomizing steam maker (5) top minute aperture is parallel with the axis of spiral atomizing steam maker (5), atomizing steam enters spiral atomizing steam maker (5) by one-level atomizing steam import (1), enter the annular space between the core pipe of one-level atomizing outer tube (3) and spiral atomizing steam maker (5) by steam spiral slot (4), atomize with the stock oil that enters by the one-level atomizing lateral material inlet of outer tube (3) (2) and mix; One-level range of atomization and secondary range of atomization shared buffering vapour-liquid mixed aerosol chamber (6); the nozzle (7) that the secondary atomizing is arranged in the buffering vapour-liquid mixed aerosol chamber (6); the secondary range of atomization is an agent structure with second steam spiral maker (10); the skin of second steam spiral maker (10) is surrounded by secondary atomizing outer tube (8); the fore portion of second steam spiral maker (10) is furnished with steam spiral slot (9); front portion, secondary range of atomization; the front end in buffering vapour-liquid mixed aerosol chamber (6) has second steam import (14); the end of secondary atomizing outer tube (8) is connected with shower nozzle (11) and ejiction opening (12); tail end is equipped with anti-wear protector (15); a plurality of minute apertures are arranged at deuterostrophies atomizing steam maker (10) top; combination distribution with narrow thin steam spiral slot (9) composition atomizing steam; spiral atomizing steam maker (10) top has 2-30 minute aperture on the plane perpendicular to axis; the axis of the minute aperture at spiral atomizing steam maker (10) top is parallel with the axis of spiral atomizing steam maker (10), and steam sprays into annular space between secondary range of atomization outer tube (8) and second steam spiral maker (10) the core pipe through steam spiral slot (9).
2. atomizing nozzle for feeding raw material in catalytic cracking according to claim 1, it is characterized in that: the front portion of described spiral atomizing steam maker (5) is for to be distributed with narrow thin steam spiral slot (4) with lead angle γ and helical pitch L, this lead angle γ=5 °-60 °, helical pitch L=0.1D-8D, D are the diameter of spiral atomizing steam maker (5) core pipe; The groove width of steam spiral slot (4) is 0.5mm-10mm;
This narrow thin steam spiral slot (4) can be that successive also can be a sectional; This narrow thin steam spiral slot (4) can be a single head, also can be bull; On the pipe section of spiral atomizing steam maker (5), along the axis direction distribution 1-5 narrow thin steam spiral slot of section (4).
3. atomizing nozzle for feeding raw material in catalytic cracking according to claim 1, it is characterized in that: the diameter d=0.2mm-5mm of spiral atomizing steam maker (5) top minute aperture, the long-pending ratio of the area sum of narrow thin steam spiral slot (4) and the core tube section of spiral atomizing steam maker (5) is between 5%-50%; The diameter of the core pipe of spiral atomizing steam maker (5) and one-level atomizing outer tube (3) is than between 10%-80%; Distance between the top of spiral atomizing steam maker (5) and the secondary range of atomization outer tube (8) is the diameter of 0-5 times of secondary range of atomization outer tube (8).
4. atomizing nozzle for feeding raw material in catalytic cracking according to claim 1, it is characterized in that: described secondary atomizing nozzle (7) for a plurality of oblique narrow groove of the angled α of secondary range of atomization outer tube (8) axis, the nozzle (7) of secondary atomizing be 2-20 along secondary range of atomization outer tube (8) the axis oblique narrow groove that distributes, oblique angle α=5 of the nozzle (7) of secondary atomizing °-80 °, the oblique narrow well width that changes the nozzle (7) of secondary atomizing over to is 0.5mm-10mm, and the atomize ratio of sectional area of outer tube (3) of oblique narrow groove area sum and the one-level that changes the nozzle (7) of secondary atomizing over to is 10%-90%.
5. atomizing nozzle for feeding raw material in catalytic cracking according to claim 1, it is characterized in that: the front portion of spiral atomizing steam maker (10) is for to be distributed with narrow thin steam spiral slot (9) with lead angle β and helical pitch M, lead angle β=5 of narrow thin steam spiral slot (9) °-60 °, its helical pitch M=0.1B-8B, B are the diameter of second steam spiral maker (10) core pipe; Narrow thin steam spiral slot (9) groove width is: 0.5mm-10mm.
6. atomizing nozzle for feeding raw material in catalytic cracking according to claim 1 is characterized in that: narrow thin steam spiral slot (9) can be that continuous distribution also can be that segmentation distributes; Can be single head, also can be bull; On the pipe section of deuterostrophies atomizing steam maker (10), along the narrow thin steam spiral slot (9) of axis direction distribution 1-5 section.
7. atomizing nozzle for feeding raw material in catalytic cracking according to claim 1 is characterized in that: the diameter d=0.2mm-5mm of described spiral atomizing steam maker (10) top minute aperture; The long-pending ratio of the area sum of narrow thin steam spiral slot (9) and second steam spiral maker (10) core tube section is between 5%-50%; The diameter of the core pipe of deuterostrophies atomizing steam maker (10) and secondary range of atomization outer tube (8) is than between 10%-80%; Distance is that 0-5 is doubly to the diameter of secondary range of atomization outer tube (8) between the top of spiral atomizing steam maker (10) and the ejiction opening 12.
8. atomizing nozzle for feeding raw material in catalytic cracking according to claim 1 is characterized in that: described shower nozzle (11) is sphere, elliposoidal or quadrate; Described ejiction opening (12) is 2n, and n is a positive integer; Described ejiction opening (12) be shaped as trilateral or fan-shaped; Ejiction opening (12) is long and narrow, and long-width ratio is 3-10; The drift angle of ejiction opening (12) is 20 °-150 °, and the width of ejiction opening (12) is δ=1mm-10mm; Ejiction opening (12) is to arrange at an angle, and arrangement angle is 5 °-30 °; Angle between the drift angle medullary ray of ejiction opening (12) and secondary range of atomization outer tube (8) axis is 0 °-30 °.
9. atomizing nozzle for feeding raw material in catalytic cracking according to claim 1 is characterized in that: the angle between described material inlet (2) and the one-level range of atomization outer tube (3) is 10 °-150 °; Angle between one-level range of atomization outer tube (3) and the buffering vapour-liquid mixed aerosol chamber (6) is 30 °-150 °; Diameter between buffering vapour-liquid mixed aerosol chamber (6) and the secondary range of atomization outer tube (8) is than between 10%-80%.
10. atomizing nozzle for feeding raw material in catalytic cracking according to claim 1 is characterized in that: described anti-wear protector (15) is trapezoidal on horizontal section; Anti-wear protector (15) is trapezoidal on vertical section; The horizontal plane drift angle of anti-wear protector (15) is 30 °-165 °; The vertical surface drift angle of anti-wear protector (15) is 10 °-45 °; Distance between anti-wear protector (15) and the ejiction opening (12) is that 0.5-10 is doubly to the wall thickness of ejiction opening (12).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101719083A CN101381618B (en) | 2008-10-27 | 2008-10-27 | Atomizing nozzle for feeding raw material in catalytic cracking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101719083A CN101381618B (en) | 2008-10-27 | 2008-10-27 | Atomizing nozzle for feeding raw material in catalytic cracking |
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| Publication Number | Publication Date |
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| CN101381618A CN101381618A (en) | 2009-03-11 |
| CN101381618B true CN101381618B (en) | 2011-03-30 |
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