CN103666522B - Catalytic cracking unit feed nozzle - Google Patents
Catalytic cracking unit feed nozzle Download PDFInfo
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- CN103666522B CN103666522B CN201310545464.6A CN201310545464A CN103666522B CN 103666522 B CN103666522 B CN 103666522B CN 201310545464 A CN201310545464 A CN 201310545464A CN 103666522 B CN103666522 B CN 103666522B
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Abstract
The invention discloses a kind of catalytic cracking unit feed nozzle, described nozzle comprises outer tube (5), on described outer tube, there are steam or feedstock oil entrance (2), the two ends of outer tube have respectively feedstock oil or steam inlet (1) and front end that the shower nozzle matrix (15) of shower nozzle group (16) is housed, in outer tube, there is inner tube steam distributor (3), between outer tube and inner tube steam distributor, there is annular hybrid chamber (6), on inner tube steam distributor, there is the distributor (7) on circumferential distribution of steam hole (4) and top, between distributor and shower nozzle matrix, there are four hybrid chambers and two strengthening mixing baffles. the present invention can form the flat fan being made up of multiply microjet and spray, and there is to good covering in riser cross section, catalyst can pass through between each microjet, has increased finish contact area, the contact of strengthening finish, and can not form vortex at the lee side of fan spray, eliminate the hidden danger of oil gas backrush touching riser wall formation coking.
Description
Technical field
The present invention relates to one for refinery catalytic cracking unit's feed nozzle, belong to catalyst cracker field.
Background technology
Riser reactor is the core component of catalyzed cracking processing process. In the course of reaction of riser reactor, feedstock oilEnter reactor through atomization, contact, be heated with catalyst and vaporize and react under catalyst action. After charging, oil gas is insteadAnswer in device and generally stop 2-3 second, complete reaction and entering finish piece-rate system afterwards, stop reaction. This technical process requires formerMaterial oil, after atomization enters reactor, should carry out contacting fast and uniformly with catalyst, fully contacts the required time shorterBetter, be beneficial to the carrying out of course of reaction. This external charging should form after contacting with finish and realizing fast in riserLaminar flow flows uniformly, to form uniform reaction time, is easy to like this realize the control to reaction, and ensures objectThe maximum yield of product. The task of the atomizing feed nozzle of catalytic cracking unit is by feedstock oil (heavy oil or residual oil or its mixture)Be atomized into tiny drop and spray into riser, under the reaction temperature in riser, feedstock oil gasification and under catalyst actionCracking reaction occurs, then pass through separator, the separation of carrying out oil gas, catalyst enters next procedure.
General atomizing feed nozzle, is all made up of hybrid chamber and ejection section. In hybrid chamber, the liquid being atomized and auxiliary mistThe steam of changing meets, and mutually shearing splitting forms the two phase flow of mutual blending, and then this two phase flow is by the spout of ejection sectionEjection. These nozzles are substantially all to utilize fluid dynamic flow stability theory, produce large as far as possible vapour in hybrid chamber(gas) liquid two-phase speed difference, reaches the object of tearing with broken liquid.
The atomizer of early application is wikipedia type nozzle both at home and abroad, and steam directly sprays into the liquid of nozzle hybrid chamber by a pipeIn body, tear liquid by the shearing between steam and liquid, spout is general Circular Jet spout, and atomizing effect is poor.Atomization average grain diameter is many at 80-100 μ m, is called first generation feed nozzle.
Through improvement after having produced second generation feed nozzle, as external target spray nozzle and domestic pre-membrane type nozzle, with andIts some nozzles, the atomization average grain diameter of these nozzles is many at 60-80 μ m, due to the great vapour of needs (gas) liquid two-phase speed difference,Reach the object of tearing with broken liquid, so must adopt great admission (gas) speed, what have has has even met or exceeded soundSpeed, energy consumption is larger, and can produce pulsation. If do not reach this speed, nozzle is just difficult to normal work, and atomizing effect is anxiousAcute deterioration, and operating flexibility is also affected.
Some recent nozzles can produce the spraying jet of flat spraying jet or flat fan, and riser cross section is had betterCovering, but this single jet, can block the fluidized catalyst incoming flow of riser and raising section, at fluoran stream surface, catalystThere is good contact with charging, but do not reach catalyst in the charging of lee side, and can produce in the downstream of lee sideLarge whirlpool, makes oil gas backrush, and touching riser wall, causes the coking hidden danger at riser wall.
In addition the nozzle of single jet, but charging contacts better at fluoran stream surface with catalyst does not reach catalyst at lee side,Make in reactor the actual oil ratio of realizing lower than nominal oil ratio, or charging contact with the microcosmic of catalyst be notOptimum state.
Summary of the invention
The atomizing feed nozzle of the catalytic cracking unit the present invention relates to, has hybrid chamber and ejection section to form. At mixing section feedstock oilHave the good mixing that contacts with atomizing steam, ejection section is made up of the spout group of particular design, can be formed with multiply microjet structureThe flat fan spraying becoming, has good covering to riser cross section; Catalyst can pass through between each microjet simultaneously, makesThe mist of oil jet of multiply microjet and catalyst have long-pending compared with large contact surface, and finish contact is better, due to catalyst and the oil gas of upstreamCan see through fan-spray jet by the space between microjet, catalyst not only with oil gas cross-contact, and penetrate fan-shapedThe lee side of stream can not form vortex, eliminates the hidden danger of oil gas backrush touching riser wall formation coking.
By the nozzle group of particular design, can form very evenly tiny drop, thereby fully contact with catalyst, carryingAt temperature in riser, feedstock oil gasifies rapidly, and cracking reaction is carried out at gaseous state, can improve light oil (gasoline, diesel oil)Productive rate, reduce green coke.
Structure of the present invention comprises:
1. feedstock oil (steam) entrance, 2. steam (feedstock oil) entrance, 3. inner tube steam distributor, 4. distribution hole, 5.Outer tube, 6. annular hybrid chamber, 7. distributor, 8. the first hybrid chamber, 9. the first strengthening mixing baffle, 10. the second hybrid chamber,11. redistributors, 12. the 3rd hybrid chambers, 13. second strengthening mixing baffles, 14. the 4th hybrid chambers, 15. shower nozzle matrixes,16. shower nozzle groups, there is feedstock oil (steam) entrance 1 one end of outer tube 5, has steam (feedstock oil) entrance 2 on outer tube 5,The other end of outer tube 5 has shower nozzle matrix 15, and the front end of shower nozzle matrix 15 is equipped with shower nozzle group 16, has inner tube steam in outer tube 5Distributor 3, has annular hybrid chamber 6 between outer tube 5 and inner tube steam distributor 3, have circumferential steam on inner tube steam distributor 3The distributor 7 on distribution hole 4 and top, has the first hybrid chamber 8, the second hybrid chamber 10, between distributor 7 and shower nozzle matrixBetween three hybrid chambers 12 and the 4th hybrid chamber 14, the first hybrid chambers 8 and the second hybrid chamber 10, there is the first strengthening mixing baffle 9,Between the second hybrid chamber 10 and the 3rd hybrid chamber 12, have between redistributor 11, the three hybrid chambers 12 and the 4th hybrid chamber 14 and haveThe second strengthening mixing baffle 13.
The present invention also adopts following embodiment:
Inner tube steam distributor 3 circumferentially has 1～30 circle (row) distribution of steam hole 4
The dispatcher 7 of inner tube steam distributor 3 can be plate shaped, can be also torispherical, has uniform on itInside and outside two circle holes.
Distributor 7 cycle holes have formed the passage of annular hybrid chamber 6 and the first hybrid chamber 8, and hole count can be 4～12, canCircle or rectangle, the hole gross area be annular hybrid chamber 6 cross-sectional areas 0.1～0.5 between.
Distributor 7 inner ring holes have formed the passage of inner tube steam distributor 3 and the first hybrid chamber 8, and hole count can be 1-8,Can be circular and square, the hole gross area be between the 0.25-0.75 of inner tube steam distributor 3 cross-sectional areas.
In the whole pipe section of inner tube steam distributor 3, have the circumferential distribution of steam hole 4 that 1～30 row distributes along even circumferential.
Distribution of steam hole 4, along being uniform on the length direction of inner tube steam distributor 3, also can be scattered.
The diameter in distribution of steam hole 4 is at 1～60mm.
The ratio of the area sum in distribution of steam hole 4 and inner tube 3 cross-sectional areas is between 0.1～5.
The diameter of inner tube steam distributor 3 and outer tube 5 diameter ratios are between 0.2～0.95.
Distance on inner tube steam distributor 3 between front end first row distribution of steam hole 4 and distributor 7 is at outer tube 5 diametersBetween 0.1～20.
Distributor 7 and the distance of the first strengthening between mixing baffle 9 outer tube 5 diameters 0.1～20 between.
Distance between the first strengthening mixing baffle 9 and redistributor 11 outer tube 5 diameters 0.1～10 between, diameter is with outwardPipe diameter ratio is between 0.4～0.85.
Redistributor 11 and the distance of the second strengthening between mixing baffle 13 outer tube 5 diameters 0.1～5 between.
Distance between the second strengthening mixing baffle 13 and shower nozzle matrix 15 outer tube 5 diameters 0.1～5 between, diameter is with outwardPipe diameter ratio is between 0.4～0.85.
Hole on redistributor on 11 can be 1～5 circle, and bore dia is between 4～60mm.
There are 8～30 independent sprayers in shower nozzle matrix 15 upper nozzle groups 16, and diameter is between 4～20mm.
It is uniform that shower nozzle group 16 can be individual pen, can be also that 1～4 row is staggered.
The shower nozzle of shower nozzle group 16 is diffusion way in the horizontal direction to be arranged, inner side shower nozzle center line and outer tube 5 axis are in levelThe projection angle of direction is β 1, the scope of angle of flare β 1 between 0 °～30 °, outermost shower nozzle center line and outer tube 5 axisProjection angle is in the horizontal direction β 2, and the scope of angle of flare β 2 is between 0 °～60 °.
The shower nozzle of shower nozzle group 16 is contraction mode at vertical direction to be arranged, inner side shower nozzle center line and outer tube 5 axis are vertical sideBe α 1 to projection angle, angle of throat α 1 is between 0 °～15 °, and outermost shower nozzle center line and outer tube 5 axis are at vertical directionThe angle of projection be α 2, angle of throat α 2 is between 0 °～30 °.
16 each shower nozzle central axis projections in the horizontal direction of shower nozzle group form fan-shaped, the shower nozzle overlapping in floor projectionCenter line staggers each other.
New type nozzle provided by the invention is a kind of atomizer based on internal-mixing atomizing principles, has spy in its hybrid chamber insideDifferent steam distributor, by this steam distributor, gas, liquid two-phase in hybrid chamber with good mode contact, fragmentation,The energy that can reasonably utilize atomizing steam, steam needn't have very large speed, and steam is through the distribution of this particular designWhen device, produce very little pressure drop, just can be at the even and fine stream-liquid two-phase flow of the inner formation of nozzle hybrid chamber, vapour phase is with the shape of minute bubblesFormula is present among liquid phase; Under the effect of two-stage strengthening mixing baffle and redistributor, what in multistage hybrid chamber, form is even and fineBiphase gas and liquid flow; Ejection section is made up of the spout group of particular design. Particularly, the present invention proposes two-stage strengthening mixing baffle, againDistributor and multistage hybrid chamber, repeatedly mix vapour-liquid experience, increases the shear action of vapour-liquid part; While two-stage distributorOutlet pressure reduces suddenly, bubble volume expands rapidly (explosion) in vapour-liquid (gas-liquid) two phase flow, further refinement dropParticle diameter. Because the multiply steam microjet of the total steam distributor of the present invention contacts with feedstock oil incoming flow continuous uniform, therefore this sprayMouth operates steadily, and can not produce pulsation.
In addition, the shower nozzle group of the particular design that the present invention proposes, horizontal direction is diffusion and sprays (angle of flare β 1 and β 2),Vertical direction sprays (angle of throat α 1 and α 2) for shrinking, and can be formed with the flat fan spraying that multiply microjet forms, rightThere is good covering in riser cross section; Catalyst can pass through between each microjet simultaneously, makes the mist of oil jet of multiply microjetHave compared with large contact surface and amass with catalyst, finish contact is better, because catalyst and the oil gas of upstream can pass through between microjetSpace sees through fan-spray jet, and catalyst not only better contacts with oil gas, and can not form whirlpool at the lee side of fan sprayRevolve, eliminated the hidden danger of oil gas backrush touching riser wall formation coking. In addition, catalyst can once pass through mist of oil jet,Can not form very thick oil reservoir at catalyst surface because the stroke by mist of oil district is too large, affect product selectivity. Therefore thisThe shape of planting the spraying jet of nozzle generation also meets the requirement of catalytic cracking process.
Brief description of the drawings
Fig. 1 is atomizing feed nozzle structural representation of the present invention.
In Fig. 1,1. feedstock oil (steam) entrance, 2. steam (feedstock oil) entrance, 3. inner tube steam distributor, 4. pointCloth hole, 5. outer tube, 6. annular hybrid chamber, 7. distributor, 8. the first hybrid chamber, 9. the first strengthening mixing baffle, 10. theTwo hybrid chambers, 11. redistributors, 12. the 3rd hybrid chambers, 13. second strengthening mixing baffles, 14. the 4th hybrid chambers, 15. spraysMatrix, 16. shower nozzle groups.
Fig. 2 is the structural representation of inner tube steam distributor 3 of the present invention;
Fig. 3 is the Pareto diagram of distribution hole on distributor 7 of the present invention;
Fig. 4 is the structural representation that the present invention first strengthens mixing baffle 9;
Fig. 5 is the structural representation of redistributor 11 of the present invention;
Fig. 6 is the structural representation that the present invention second strengthens mixing baffle 13;
Fig. 7 is the shower nozzle angle of throat α 1 of group of the present invention and α 2 schematic diagrames;
Fig. 8 is the shower nozzle angle of flare β 1 of group of the present invention and β 2 schematic diagrames.
Detailed description of the invention
Below in conjunction with accompanying drawing, atomizing nozzle for feeding raw material in catalytic cracking of the present invention is described.
With reference to figure 1, feed nozzle comprises feedstock oil (steam) entrance, 2. steam (feedstock oil) entrance, and 3. inner tube steam dividesCloth device, 4. distribution hole, 5. outer tube, 6. annular hybrid chamber, 7. distributor, 8. the first hybrid chamber, 9. the first strengthening mixes gearPlate, 10. the second hybrid chamber, 11. redistributors, 12. the 3rd hybrid chambers, 13. second strengthening mixing baffles, 14. the 4th is mixedClose chamber, 15. shower nozzle matrixes, 16. shower nozzle groups, there is feedstock oil (steam) entrance 1 one end of outer tube 5, on outer tube 5, has steamingVapour (feedstock oil) entrance 2, the other end of outer tube 5 has shower nozzle matrix 15, and the leading portion of shower nozzle matrix 15 is equipped with shower nozzle group 16,In outer tube 5, have inner tube steam distributor 3, have annular hybrid chamber 6 between outer tube 5 and inner tube steam distributor 3, inner tube steam dividesOn cloth device 3, have the distributor 7 on circumferential distribution of steam hole 4 and top, between distributor 7 and shower nozzle matrix, have the first hybrid chamber 8,Between the second hybrid chamber 10, the 3rd hybrid chamber 12 and the 4th hybrid chamber 14, the first hybrid chambers 8 and the second hybrid chamber 10, have firstBetween strengthening mixing baffle 9, the second hybrid chambers 10 and the 3rd hybrid chamber 12, there are redistributor 11, the three hybrid chambers 12 and the 4thBetween hybrid chamber 14, there is the second strengthening mixing baffle 13.
With reference to figure 2, Fig. 3, inner tube steam distributor 3 is circumferentially distributed with 1～30 circle (row) distribution of steam hole 4, inner tube steamDistributor 3 front ends can be plate shaped, can be also torisphericals, have and are uniformly distributed at the head of plate shaped or torisphericalInside and outside two circle axial distribution of steam holes formed distributor 7, its front end center can be also a hollow pipe or have oneLarger spray orifice, its front end outer shroud distribution of steam hole can be that circle can be also rectangle or foursquare, sees Fig. 3; Inner tube is steamedOn vapour distributor, on circumferential distribution hole 4 and distributor 7, axially the diameter in distribution of steam hole is (or straight with 1～60mm at 1～60mmThe rectangle of footpath homalographic), all circumferentially the area sum in distribution of steam hole 4 exists with the ratio of the sectional area of inner tube steam distributor 3Between 0.1～5, the diameter ratio of the diameter of inner tube steam distributor 3 and outer tube 5 between 0.2～0.95, distributor 7 and firstThe distance of strengthening between mixing baffle 9 outer tube 5 diameters 0.1～20 between, the first strengthening mixing baffle 9 and redistributor 11Between distance outer tube 5 diameters 0.1～10 between, redistributor 11 and the distance of the second strengthening between mixing baffle 9 existOuter tube 5 diameters 0.1～5 between, the distance between the second strengthening mixing baffle 9 and shower nozzle matrix 15 is at 0.1～5 of outer tube 5 diametersBetween.
With reference to figure 4, Fig. 5, Fig. 6, the circle between the first hybrid chamber 8 and the second hybrid chamber 10 is strengthened the straight of mixing baffle 9Footpath is to have evenly on the redistributor 11 between the 0.4～0.85, second hybrid chamber 10 and the 3rd hybrid chamber 12 of outer tube 5 diametersDistribution 1-5 encloses hole, and bore dia is between 4～60mm, and center can be also a larger spray orifice, the 3rd hybrid chamber 12 andThe diameter of the circle strengthening mixing baffle 13 of the strengthening of second between four hybrid chambers 14 mixing baffle is outer tube 5 diameters0.4～0.85。
The length of nozzle or the length of outer tube need to determine according to scene, and the diameter of outer tube is relevant with the treating capacity of nozzle, designPrinciple is that in annular space, the flow velocity of feedstock oil remains between 0.1～9m/s.
With reference to figure 7, Fig. 8, there are 8～30 independent sprayers in shower nozzle matrix 15 upper nozzle groups 16, and diameter is between 4～20mm.It is uniform that shower nozzle group 16 can be individual pen, can be also that 1-4 row is staggered, and the shower nozzle of shower nozzle group 16 is in the horizontal directionDiffusion way arranges, inner side shower nozzle center line and outer tube 5 axis projection angle are in the horizontal direction β 1, angle of flare β's 1Scope is between 0 °～30 °, and outermost shower nozzle center line and outer tube 5 axis projection angle are in the horizontal direction β 2, diffusionThe scope of angle β 2 is between 0 °～60 °, and the shower nozzle of shower nozzle group 16 is contraction mode at vertical direction to be arranged, in the shower nozzle of inner sideHeart line and outer tube 5 axis are α 1 at vertical direction projection angle, angle of throat α 1 between 0 °～15 °, outermost shower nozzle centerLine and outer tube 5 axis are α 2 at the angle of the projection of vertical direction, and angle of throat α 2 is between 0 °～30 °.
Feedstock oil enters annular space hybrid chamber 6, distributor 7, the first hybrid chamber 8, the first strengthening in nozzle by entrance 2Baffle plate 9, the second hybrid chamber 10, redistributor 11, the 3rd hybrid chamber 12, the second strengthening mixing baffle 13, the 4th hybrid chamber15, and flow to the direction of shower nozzle group 16; Atomizing steam enters the steam distributor 3 that is positioned at center by entrance 1, and logicalCircumferential distribution of steam hole 4 and top distributor 7 that in crossing, on tubular type steam distributor 3, many places distribute along even circumferential outwards spray,Spray in feedstock oil evenly, continuously, reposefully, mix equably with feedstock oil. Because circumferential distribution of steam hole 4 is divided at steamOn the inner tube circumference of cloth device 3, be uniformly distributed, and be positioned at feedstock oil must through position, in the time that feedstock oil is flowed through these positions natureThe steam institute being ejected is broken, and feedstock oil is cut, is broken into very little drop, and because application point is many, contact area is large,Make steam and feedstock oil at the thin biphase gas and liquid flow of the interior formation of annular space hybrid chamber 6, thereby completed the atomization of first stage,And flow into the first hybrid chamber 8 through distributor 7. After this, inner tube steam distributor 3 boil-off are divided through distributor 7 centersCloth hole sprays at a high speed the stream-liquid two-phase flow in the first hybrid chamber 8, collision and the shearing of aggravation gas phase and liquid phase, further refinement liquidBody. Then mix through the first strengthening baffle plate 9, the second hybrid chamber 10, redistributor 11, the 3rd hybrid chamber 12, the second strengthening togetherClose baffle plate 13, the 4th hybrid chamber 14, repeatedly strengthening mix and effect after by shower nozzle group 16 according to the designated parties of each shower nozzleTo ejection at a high speed, occur to collide tempestuously, shear with surrounding medium, liquid mist is changed into tiny drop, complete secondary-atomizing;Meanwhile, because pressure from spout 16 ejections reduces suddenly, the unexpected explosion of bubble volume (expansion) in even and fine biphase gas and liquid flow,Drop is further broken into very tiny drop, thereby completes whole atomization process; Liquid-vapor mixture is via particular designSpout group 16, can be formed with the flat fan spraying that multiply microjet forms, and realizes the good covering in riser cross section;
Can find out by above-mentioned process, due to the particular design of nozzle hybrid chamber, can make full use of the energy of steam,In the very little situation of pressure drop, just can in hybrid chamber, form the biphase gas and liquid flow distributing very evenly, make atomized drop tiny allEven, and there is no large drop. And by the particular design of spout group, utilize effervescent atomization principle to carry out entering one to dropThe atomization of step, and can form the flat fan spraying that multiply microjet forms, there is to good covering in riser cross section; Urge simultaneouslyAgent can be passed through between each microjet, the mist of oil jet of multiply microjet and catalyst is had long-pending compared with large contact surface, finishBetter, the space that can pass through between microjet due to catalyst and the oil gas of upstream sees through fan-spray jet, catalyst in contactCan not form vortex not only with oil gas cross-contact, and at the lee side of fan spray, eliminate oil gas backrush touching riser wallFace forms the hidden danger of coking. The nozzle group of particular design proposed by the invention, can form very evenly tiny drop, andFlat fan spraying jet, and jet diffusion and angle of throat can regulate as required, can meet riser technology completelyTo the requirement of spraying jet, thereby fully contact with catalyst, at the temperature in riser, feedstock oil gasifies rapidly, makes to splitChange reaction and carry out at gaseous state, can improve the productive rate of light oil (gasoline, diesel oil), reduce green coke.
By the test of application Malvern laser particle analyzer, under commercial scale flow (30t/h), the spray that the present invention proposesMouth, the liquid mist that can be 5cP by viscosity changes into the fine drop that SMD particle diameter is 50 μ m. And make industrial at presentWith the atomized drop SMD particle diameter of various nozzles be 60～80 μ m.
There is certain requirement each spray orifice injection direction and the position of nozzle group, the projection in the horizontal direction of each orifice center axis thatThis is staggered, form the spraying jet of required shape, has the shape of corresponding spout, and meanwhile, the area of nozzle group is with mixedClosing chamber and treating capacity has certain matching relationship, to reach critical spray pattern. Be that treating capacity is identical, when spray orifice injection direction andWhen diameter changes, the matching relationship of its area and treating capacity also will change. For long-term operation, nozzle surface and spoutPlace will make Wear-resistant Treatment.
Spray orifice in nozzle group is in the horizontal direction diffusion and sprays, and shrink and spray at vertical direction, and wrong each other in the horizontal directionOpen, form netted flat fan spraying. In an embodiment, each microjet staggers each other, and advantage is that adjacent two strands of microjets existHorizontal direction is separated from each other and travels forward at an angle, can not be condensed into large drop because collecting, and drop can obtain furtherAtomization, shrink at an angle injection at vertical direction, after the good atomization of a segment distance drop, each strand of liquid mist respectively toOuter motion, because nozzle group central area relative pressure is lower, each strand of jet in the vertical direction converges to center, end formReticulate the spraying jet of flat fan, realize the good covering in riser cross section. In addition, catalyst and oil gas can be by micro-Space between jet sees through fan-spray jet, catalyst not only with oil gas cross-contact, and at the lee side of fan sprayCan not form vortex, eliminate the hidden danger of oil gas backrush touching riser wall formation coking.
The horizontal proliferation angle of spray orifice jet and vertically reduce angle and can design as required, makes spray to adjust a microjet angleThe angle of coverage of mist jet.
This atomizing feeding nozzle has good atomizing effect, and is applicable to the liquid that viscosity is larger, as heavy oil or residual oil.This atomizing feeding nozzle has good operating flexibility, and its treating capacity can change between 70%～130%. This nozzleFor refinery catalytic cracking unit.
Claims (7)
1. a catalytic cracking unit feed nozzle, is characterized in that described nozzle comprises outer tube (5), and described outer tube has steaming on (5)Vapour or feedstock oil entrance (2), there are feedstock oil or steam inlet (1) in one end of outer tube (5), and the other end of outer tube (5) has sprayMatrix (15), the front end of shower nozzle matrix (15) is equipped with shower nozzle group (16), has inner tube steam distributor (3) in outer tube (5),Between outer tube (5) and inner tube steam distributor (3), have annular hybrid chamber (6), inner tube steam distributor has circumferential steaming on (3)The distributor (7) on vapour distribution hole (4) and top, between distributor (7) and shower nozzle matrix (15), have the first hybrid chamber (8),The second hybrid chamber (10), the 3rd hybrid chamber (12) and the 4th hybrid chamber (14), the first hybrid chamber (8) and the second hybrid chamber (10)Between have the first strengthening mixing baffle (9), between the second hybrid chamber (10) and the 3rd hybrid chamber (12), have redistributor (11),Between the 3rd hybrid chamber (12) and the 4th hybrid chamber (14), there is the second strengthening mixing baffle (13), the upper spray of shower nozzle matrix (15)There are 8～30, the independent sprayer of diameter 4～20mm in group (16), and shower nozzle group (16) is that individual pen is uniform or 1-4 is rowStaggered, the shower nozzle of shower nozzle group (16) is diffusion way in the horizontal direction to be arranged, is contraction mode arranges at vertical direction,Each shower nozzle central axis projection in the horizontal direction forms fan-shaped, and the shower nozzle center line overlapping in floor projection staggers each other.
2. a kind of catalytic cracking unit feed nozzle according to claim 1, is characterized in that described inner tube steam distributor (3)Whole pipe section on, have 1～30 row along even circumferential distribute circumferential distribution of steam hole (4); Described distribution of steam hole (4)Diameter at 1～10mm; The dispatcher (7) of described inner tube steam distributor (3) is plate shaped or torispherical,On it, have uniform inside and outside two circle holes; The diameter of distributor (7) inner ring hole is at 1～60mm, and the diameter of cycle hole is at 1～60mmOr with the width of the 1～60mm diameter homalographic rectangular opening that is h.
3. according to a kind of catalytic cracking unit feed nozzle described in claim 1 or 2, it is characterized in that described inner tube steam distributor (3)Diameter and outer tube (5) diameter ratio between 0.2～0.95; The area sum in distribution of steam hole (4) and inner tube distribution of steamThe ratio of device (3) sectional area between 0.1～5, first round in inner tube steam distributor (3) front end distribution of steam hole (4)Distance between center and distributor (7) outer tube (5) diameter 0.1～20 between.
4. according to a kind of catalytic cracking unit feed nozzle described in claim 1 or 2, it is characterized in that described inner tube steam distributor (3)Distributor (7) cycle hole of front end has formed the passage of annular hybrid chamber (6) and the first hybrid chamber (8), and hole count is 4～12Individual, be circle or rectangle, the hole gross area be annular hybrid chamber (6) 0.1～0.5 between; Inner ring hole has formed inner tube steam and has dividedThe passage of cloth device (3) and the first hybrid chamber (8), hole count is 1-8, is circular or square, the hole gross area is that inner tube is steamedBetween the 0.25-0.75 of vapour distributor (3) cross-sectional area.
5. a kind of catalytic cracking unit feed nozzle according to claim 4, is characterized in that described distributor (7) and the last the firstChange distance between mixing baffle (9) outer tube (5) diameter 0.1～20 between; First strengthening mixing baffle (9) with againDistance between distributor (11) outer tube (5) diameter 0.1～10 between, diameter with the ratio of outer tube diameter 0.4～0.85Between; Redistributor (11) and the distance of the second strengthening between mixing baffle 13 outer tube (5) diameter 0.1～5 between;Second strengthening mixing baffle (13) and shower nozzle matrix (15) between distance outer tube (5) diameter 0.1～5 between, diameterAnd the ratio of outer tube diameter is between 0.4～0.85.
6. according to a kind of catalytic cracking unit feed nozzle described in claim 1 or 5, it is characterized in that described redistributor (11)On hole be 1～5 circle, bore dia is between 4～60mm.
7. a kind of catalytic cracking unit feed nozzle according to claim 1, is characterized in that the interior of described shower nozzle group (16)The scope of the angle of flare β 1 of a side spray center line and the projection in the horizontal direction of outer tube (5) axis between 0 °～30 °, outermostThe scope of the angle of flare β 2 of shower nozzle center line and outer tube (5) axis projection is in the horizontal direction between 0 °～60 °; Shower nozzle group(16) inner side shower nozzle center line and outer tube (5) axis the scope of the angle of throat α 1 of vertical direction projection 0 °～15 ° itBetween, outermost shower nozzle center line and outer tube (5) axis in the scope of the angle of throat α 2 of vertical direction projection between 0 °～30 °.
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| CN104815606B (en) * | 2015-05-14 | 2016-08-24 | 神华集团有限责任公司 | Gas-phase polymerization system and spray nozzle device thereof |
| CN109482380B (en) * | 2018-12-24 | 2023-11-21 | 亿川科技(成都)有限责任公司 | Mixed-flow type multistage steam atomizing nozzle |
| CN109877643B (en) * | 2019-04-08 | 2020-09-29 | 珠海格力电器股份有限公司 | Oil liquid atomizing device and oil liquid atomizing and feeding system |
| CN110668627A (en) * | 2019-09-20 | 2020-01-10 | 天津科技大学 | High-efficiency ultrasonic rotary film deoxidization head |
| CN110757240B (en) * | 2019-11-04 | 2022-03-22 | 深圳市普林司顿模具塑胶有限公司 | Emulsion spray cooling processing technology of mould and processing machine tool thereof |
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| US8114272B2 (en) * | 2008-09-26 | 2012-02-14 | Exxonmobil Research & Engineering Company | Method for treating refinery waste streams in a fluid catalytic cracking unit and an improved catalytic cracking unit for processing refinery waste streams |
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| CN101091886A (en) * | 2006-06-24 | 2007-12-26 | 严旭明 | Static equispaced disperser |
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