CN203754651U - Feeding nozzle of lifting pipe of high-efficiency catalytic cracking device - Google Patents
Feeding nozzle of lifting pipe of high-efficiency catalytic cracking device Download PDFInfo
- Publication number
- CN203754651U CN203754651U CN201420105577.4U CN201420105577U CN203754651U CN 203754651 U CN203754651 U CN 203754651U CN 201420105577 U CN201420105577 U CN 201420105577U CN 203754651 U CN203754651 U CN 203754651U
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- mixing section
- injector head
- catalytic cracking
- atomizing
- venturi tube
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Abstract
The utility model belongs to the technical field of petroleum processing and discloses a feeding nozzle of a lifting pipe of a high-efficiency catalytic cracking device. The feeding nozzle comprises a nozzle head 3, a nozzle head jacket 4, a Venturi tube 5, a mixing chamber 6, a raw material oil inlet 7, a secondary atomized steam inlet 1 and a primary atomized steam inlet 2, wherein the nozzle head 3 is arranged in the nozzle head jacket 4 at the upper part; the nozzle head jacket 4 is connected with the mixing chamber 6 in the lower part through the Venturi tube 5 in the middle; the primary atomized steam inlet 2 is formed in the outer side of the lower part of the mixing chamber 6; the raw material oil inlet 7 is formed in the outer side of the middle of the mixing chamber 6; the secondary atomized steam inlet 1 is formed in the bottom center of the mixing chamber 6. The feeding nozzle is simple in structure; the time of contact reaction between a catalyst and oil is shortened; the effect reflected in a practical device is that the temperature difference from a part 2m away from the feeding section of the nozzle of the lifting pipe to the outlet of the lifting pipe is smaller than 30 DEG C; the dry gas quantity and the accumulated carbon on the surface of the catalyst are reduced; the yield of target catalytic cracking products is increased.
Description
Technical field
The utility model belongs to Petroleum Processing Technology field, relates in particular to a kind of efficient catalytic cracking unit riser tube feed nozzle.
Background technology
Catalytic cracking unit is one of important device in refining of petroleum, and catalytic cracking unit is the device that mink cell focus is become to the lightweight oil of people's needs through catalytic cracking.One of prerequisite that the catalytically cracked stock of liquid heavy can fully contact with the catalyzer of solid powder particle state is exactly to make stock oil atomization, and raw material oil throwing is more good is more conducive to completing smoothly of catalytic cracking reaction process.Facts have proved that atomization droplet diameter is smaller, stock oil can fully contact with catalyzer, per pass conversion is high, the time shorten of reaction, make catalyst temperature fast reducing at short notice, in the time that the diameter of the atomization oil droplet of stock oil is less than solid powder th-1 catalyst average particulate diameter 60 μ m, the distribution of catalytic cracking reaction product is more satisfactory.
Shorten the quadric catalysis cracking that stock oil and high temperature catalyst can effectively reduce reaction product duration of contact, also can effectively reduce stock oil and high temperature catalyst Long contact time the thermo-cracking at a large amount of carbon distributions of catalyst surface generation simultaneously.A catalytic cracking riser feed nozzle that atomizing effect is good, can not only lower catalytic cracked dry gas productive rate, can also reduce catalyst surface carbon distribution, reduces refining losses, can improve the light oil yield of catalytic cracking unit simultaneously.
Summary of the invention
For overcoming the deficiencies in the prior art, originally for the object of utility model is to provide a kind of efficient catalytic cracking unit riser tube feed nozzle for catalytic cracking unit, have simple in structure, manufacture difficulty is low, the efficient feed nozzle of this stock oil convenient, atomizing effect is good is changed in installation, can make catalytic cracking reaction in 2 meters, substantially all complete more than nozzle material-feeding section.Solve that current catalytic cracking unit exists because stock oil and the catalyzer long reaction product causing duration of contact are done problem large-minded and that catalyst surface carbon distribution is too high.
For achieving the above object, the utility model adopts following technical scheme:
A kind of efficient catalytic cracking unit riser tube feed nozzle, comprise: injector head 3, injector head overcoat 4, Venturi tube 5, mixing section 6, stock oil entrance 7, secondary-atomizing steam-in 1, primary atomization steam-in 2, in superposed injector head overcoat 4, be provided with injector head 3, injector head overcoat 4 is connected by the Venturi tube 5 at middle part and the mixing section 6 of bottom, be positioned at the once atomizing steam entrance 2 of arranged outside of mixing section 6 bottoms, the arranged outside that is positioned at mixing section 6 middle parts has stock oil entrance 7, the bottom centre of mixing section 6 is provided with secondary-atomizing steam-in 1.
A kind of efficient catalytic cracking unit riser tube feed nozzle, described mixing section 6 is made up of secondary-atomizing vapour pipe, primary atomization vapour pipe, raw material oil pipe, secondary-atomizing vapour pipe one end that described mixing section 6 centers arrange extends inwardly to Venturi tube 5 always, and the other end stretches out mixing section 6 and is connected with secondary-atomizing steam-in 1; The primary atomization vapour pipe that mixing section 6 bottoms arrange extends mixing section 6, and its axis is vertical with mixing section 6 axis; The raw material oil pipe that mixing section 6 tops arrange extends mixing section 6, and its axis and mixing section 6 axis angles are 60 °.
A kind of efficient catalytic cracking unit riser tube feed nozzle, described injector head 3 bottoms are conical, injector head 3 middle parts are cylindrical flange, and cylindrical flange place is provided with one week circular spray orifice tilting to center oblique upper, and injector head 3 tops are upper large lower truncated cone-shaped.
A kind of efficient catalytic cracking unit riser tube feed nozzle, described injector head 3 is high alloy wear-resistance material formation.
A kind of efficient catalytic cracking unit riser tube feed nozzle, the cross section of described Venturi tube 5 cavitys is set to hyperbolic configuration.
Owing to adopting technical scheme as above, the utlity model has following superiority:
A kind of efficient catalytic cracking unit riser tube feed nozzle, has simple in structurely, makes catalyzer and oily contact reacts time shorten, be reflected in effect in actual device and be exactly riser tube nozzle material-feeding section above 2 meters be less than 30 DEG C to the leg outlet temperature difference; Reduce dry gas amount and catalyst surface carbon distribution; Improve the yield of catalytic cracking object product.
Brief description of the drawings
Fig. 1 is the schematic diagram of efficient catalytic cracking unit riser tube feed nozzle structure;
Fig. 2 is the partial enlarged drawing of Fig. 1.
Embodiment
As shown in Figure 1, 2: comprising: injector head 3, injector head overcoat 4, Venturi tube 5, mixing section 6, stock oil entrance 7, secondary-atomizing steam-in 1, primary atomization steam-in 2, in superposed injector head overcoat 4, be provided with injector head 3, injector head overcoat 4 is connected by the Venturi tube 5 at middle part and the mixing section 6 of bottom, be positioned at the once atomizing steam entrance 2 of arranged outside of mixing section 6 bottoms, the arranged outside that is positioned at mixing section 6 middle parts has stock oil entrance 7, and the bottom centre of mixing section 6 is provided with secondary-atomizing steam-in 1.
Described mixing section 6 is made up of secondary-atomizing vapour pipe, primary atomization vapour pipe, raw material oil pipe, secondary-atomizing vapour pipe one end that described mixing section 6 centers arrange extends inwardly to Venturi tube 5 always, and the other end stretches out mixing section 6 and is connected with secondary-atomizing steam-in 1; The primary atomization vapour pipe that mixing section 6 bottoms arrange extends mixing section 6, and its axis is vertical with mixing section 6 axis; The raw material oil pipe that mixing section 6 tops arrange extends mixing section 6, and its axis and mixing section 6 axis angles are 60 °.
Described injector head 3 bottoms are conical, and injector head 3 middle parts are cylindrical flange, and cylindrical flange place is provided with one week circular spray orifice tilting to center oblique upper, and injector head 3 tops are upper large lower truncated cone-shaped; Described injector head 3 is high alloy wear-resistance material formation.The cross section of described Venturi tube 5 cavitys is set to hyperbolic configuration.
An atomization for efficient catalytic cracking unit riser tube feed nozzle, adopts twice jet atomization, twice to clash into atomization;
1, stock oil and primary atomization steam enter after mixing section mixing, by secondary-atomizing steam ejection, realize at a high speed the primary atomization of stock oil by Venturi tube 5;
The stock oil adopting: pressure 1.2 Mpa, temperature 220-260 DEG C; The primary atomization steam adopting: pressure 0.8-0.9 Mpa, temperature >250 DEG C;
2, at the diffusing opening of Venturi tube 5, after the stock oil of the primary atomization being ejected by Venturi tube and secondary-atomizing vapor mixing, the deflection cone of air-flow high-speed impact injector head 3 bottoms is realized and is once clashed into atomization, stock oil vapor mixing air-flow after shock enters spray orifice outside injector head through deflection cone water conservancy diversion under the effect of deflection cone, and spray orifice throttling at a high speed ejection realizes secondary-atomizing;
Wherein, the spray orifice of the secondary-atomizing of employing is tilted to, centripetal layout, all high velocity airs upwards, centripetal injection clashing into injector head upper guide flow cone, realize secondary impact; From the annular space ejection of injector head top and the formation of injector head overcoat top, in riser tube, contact with catalyzer, mix and rapid reaction;
3, through twice jet atomization, twice shock realized stock oil uniform atomizing, atomization droplet diameter is less than 60 μ m, and ensure from the last Speed Reduction of nozzle, be conducive to avoid the breakage of catalyzer, wherein more than riser tube nozzle material-feeding section 2 meters of temperature difference to leg outlet are less than 30 DEG C, can reduce dry gas amount and catalyst surface carbon distribution, improve the yield of catalytic cracking object product.
The nozzle bottom of this device is mixing section, primary atomization steam-in is located at the mixing tube lower outside of nozzle bottom, its axis is vertical with mixing tube axis, stock oil entrance is located at the outer middle side part of mixing tube, its axis and mixing tube axis angle are 60 °, and stock oil and primary atomization steam mix at mixing section.Secondary-atomizing vapour pipe enters from nozzle bottom center, and extends upwardly to Venturi tube bottom always.Venturi tube bottom is connected with mixing section, and top is connected with injector head overcoat.Injector head is set in the topmost of nozzle outward, injector head overcoat upper inner adopts high-wear-resistant alloy, in the injector head overcoat that injector head is installed, injector head and injector head overcoat weld together, injector head upper and lower is respectively deflection cone, on middle right cylinder, offers spray orifice, and spray orifice is along circumference uniform distribution, the quantity of spray orifice and aperture determine according to stock oil inlet amount and atomizing steam amount and injection drop, and nozzle material adopts high-wear-resistant alloy manufacture.
Wherein, primary atomization steam-in 2, stock oil entrance 7 are located at respectively mixing section 6 bottoms and middle part, and primary atomization steam-in 2 axis are vertical with mixing section 6 axis, and stock oil entrance 7 axis and mixing section 6 axis are 60 ° of angles.Stock oil inlet amount and its physical property determine the internal diameter size of stock oil entrance 7, determine atomizing steam consumption according to the inlet amount of stock oil, thereby determine primary atomization steam-in 2 sizes, the size of mixing section 6 is determined according to raw material oil mass and primary atomization quantity of steam sum and experiment effect.Secondary-atomizing steam-in 1 is located at mixing section 6 bottom centre, and secondary-atomizing steam-in 1 pipe is along mixing section 6 centers one through to Venturi tube 5 bottoms.The internal diameter size of secondary-atomizing steam-in 1 is determined by secondary-atomizing quantity of steam and physical property thereof.Venturi tube 5 bottoms are connected with mixing section 6, and top is connected with injector head overcoat 4, and injector head overcoat 4 exits, top process with high-wear-resistant alloy.The scantlings of the structure of Venturi tube 5 is according to stock oil and atomizing steam amount sum and consider that the factor such as pressure drop and test effect is definite.Injector head overcoat 4 top outlet internal diameter sizes are determined by the outlet linear speed of being scheduled to.Injector head 3 is fixed on injector head overcoat 4 inside, and injector head 3 tops, bottom are deflection cone, and middle part right cylinder periphery is established the circular spray orifice of a circle.The pressure drop that the streams that the number of spray orifice and size preset is crossed generation decides.
When use, stock oil: pressure 1.2 Mpa(tables), temperature 220-260 DEG C; Primary atomization steam: pressure 0.8-0.9 Mpa(table) temperature >250 DEG C enters mixing section by stock oil entrance 7 and primary atomization steam-in 2 respectively and mixes, stock oil and primary atomization steam constantly move upward along mixing section 6 in mixing process, in the time arriving Venturi tube 5, by secondary-atomizing steam-in 1 eject atomizing steam ejector action, enter and pass through at a high speed Venturi tube 5 along Venturi tube edge wall, realizing the primary atomization of stock oil.At the diffusing opening of Venturi tube 5, after the stock oil of primary atomization and secondary-atomizing vapor mixing, the lower guide flow cone of high-speed impact injector head 3 is realized and is once clashed into atomization, gas-oil mixture after shock atomization is assembled to injector head overcoat 4 edges and is spouting from a circle spray orifice at injector head middle part under the effect of deflection cone, realizing the throttling of second spraying atomization spray orifice sprays and realizes secondary-atomizing at a high speed, be tilted to owing to realizing the spray orifice of secondary-atomizing, centripetal layout, all high velocity airs upwards, centripetal injection is also clashed into injector head upper guide flow cone, realize secondary impact.Finally, from the annular space ejection of injector head top and the formation of injector head overcoat top, in riser tube, contact with catalyzer, mix and rapid reaction.
Claims (5)
1. an efficient catalytic cracking unit riser tube feed nozzle, comprise: injector head (3), injector head overcoat (4), Venturi tube (5), mixing section (6), stock oil entrance (7), secondary-atomizing steam-in (1), primary atomization steam-in (2), it is characterized in that: in superposed injector head overcoat (4), be provided with injector head (3), injector head overcoat (4) is connected by the Venturi tube (5) at middle part and the mixing section (6) of bottom, be positioned at the once atomizing steam entrance (2) of arranged outside of mixing section (6) bottom, the arranged outside that is positioned at mixing section (6) middle part has stock oil entrance (7), the bottom centre of mixing section (6) is provided with secondary-atomizing steam-in (1).
2. a kind of efficient catalytic cracking unit riser tube feed nozzle according to claim 1, it is characterized in that: described mixing section (6) is made up of secondary-atomizing vapour pipe, primary atomization vapour pipe, raw material oil pipe, secondary-atomizing vapour pipe one end that described mixing section (6) center arranges extends inwardly to Venturi tube (5) always, and the other end stretches out mixing section (6) and is connected with secondary-atomizing steam-in (1); The primary atomization vapour pipe that mixing section (6) bottom arranges extends mixing section (6), and its axis is vertical with mixing section (6) axis; The raw material oil pipe that mixing section (6) top arranges extends mixing section (6), and its axis and mixing section (6) axis angle is 60 °.
3. a kind of efficient catalytic cracking unit riser tube feed nozzle according to claim 1, it is characterized in that: described injector head (3) bottom is for conical, injector head (3) middle part is cylindrical flange, cylindrical flange place is provided with one week circular spray orifice tilting to center oblique upper, and injector head (3) top is upper large lower truncated cone-shaped.
4. a kind of efficient catalytic cracking unit riser tube feed nozzle according to claim 1, is characterized in that: described injector head (3) is that high alloy wear-resistance material forms.
5. a kind of efficient catalytic cracking unit riser tube feed nozzle according to claim 1, is characterized in that: the cross section of described Venturi tube (5) cavity is set to hyperbolic configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420105577.4U CN203754651U (en) | 2014-03-10 | 2014-03-10 | Feeding nozzle of lifting pipe of high-efficiency catalytic cracking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420105577.4U CN203754651U (en) | 2014-03-10 | 2014-03-10 | Feeding nozzle of lifting pipe of high-efficiency catalytic cracking device |
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| Publication Number | Publication Date |
|---|---|
| CN203754651U true CN203754651U (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420105577.4U Withdrawn - After Issue CN203754651U (en) | 2014-03-10 | 2014-03-10 | Feeding nozzle of lifting pipe of high-efficiency catalytic cracking device |
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| CN (1) | CN203754651U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103897721A (en) * | 2014-03-10 | 2014-07-02 | 沈庆成 | Feeding spray nozzle of raising pipe of high-efficiency catalytic cracking device and atomizing method |
| CN104293372A (en) * | 2014-08-25 | 2015-01-21 | 洛阳帝博石化装备有限公司 | Heavy oil catalysis atomizing nozzle |
| CN105195348A (en) * | 2015-09-11 | 2015-12-30 | 洛阳森德石化工程有限公司 | Abrasion retarding process of regeneration flue gas double-Venturi-structure spray nozzle |
-
2014
- 2014-03-10 CN CN201420105577.4U patent/CN203754651U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103897721A (en) * | 2014-03-10 | 2014-07-02 | 沈庆成 | Feeding spray nozzle of raising pipe of high-efficiency catalytic cracking device and atomizing method |
| CN104293372A (en) * | 2014-08-25 | 2015-01-21 | 洛阳帝博石化装备有限公司 | Heavy oil catalysis atomizing nozzle |
| CN104293372B (en) * | 2014-08-25 | 2016-04-13 | 洛阳帝博石化装备有限公司 | Heavy-oil catalytic atomizing nozzle |
| CN105195348A (en) * | 2015-09-11 | 2015-12-30 | 洛阳森德石化工程有限公司 | Abrasion retarding process of regeneration flue gas double-Venturi-structure spray nozzle |
| CN105195348B (en) * | 2015-09-11 | 2018-07-27 | 洛阳森德石化工程有限公司 | A kind of abrasion of regenerated flue gas double-venturi structure nozzle slows down technique |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140806 Effective date of abandoning: 20160622 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |