CN201776201U - Catalytic cracking feeding spray nozzle - Google Patents
Catalytic cracking feeding spray nozzle Download PDFInfo
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- CN201776201U CN201776201U CN2010205033155U CN201020503315U CN201776201U CN 201776201 U CN201776201 U CN 201776201U CN 2010205033155 U CN2010205033155 U CN 2010205033155U CN 201020503315 U CN201020503315 U CN 201020503315U CN 201776201 U CN201776201 U CN 201776201U
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Abstract
The utility model discloses a catalytic cracking feeding spray nozzle, which solves the problems of the catalytic cracking feeding spray nozzle in the prior art of large atomized grain size, over-high spaying speed, non-uniform atomization, and so on. A rotational flow section conical tube (13) and a rotational flow round tube (10) are sequentially arranged at one end of a nozzle body (7), and a feed tube (14) is connected on the rotational flow section round tube in the tangential direction of the rotational flow round tube. A nozzle internal component (11) and a secondary steam distributor (4) are arranged in the inner cavity of the nozzle body, and at least one circle of steam distribution holes that are inclined toward a nozzle head (2) are formed on the secondary steam distributor. The interior of the nozzle internal component is a hollow cavity and sequentially comprises a premixing section (9), a contracting section (8), a throat opening section (6) and a diverging section (5). A secondary steam inlet tube (16) is arranged on the nozzle body and is communicated with a secondary steam chamber (2). The catalytic cracking feeding spray nozzle provided by the utility model is mainly used for a catalytic cracking device in petroleum processing industry.
Description
Technical field
The utility model relates to the used a kind of catalytic cracking feed nozzle of PETROLEUM PROCESSING industry catalytic cracking unit.
Background technology
In catalytic cracking (FCC) process, the quality of feed nozzle performance distributes to cracking reaction, product and plays an important role.Wellatomized charging and high-temperature regenerated catalyst short-time contact, make the charging gasification rate fast, be swift in response, the liquid amount of carrying reduces on the catalyst, can improve yield of light oil, reduce coke yield, improve the product distribution, prevent overcracking, eliminate the coking phenomenon in the riser reactor, bring considerable economic.Therefore, both at home and abroad correlative study mechanism is continually developing always and is releasing new and effective catalytic cracking feed nozzle, with the needs that adapt to the catalytic cracking technology development and obtain bigger economic benefit.
At present both at home and abroad the catalytic cracking feed nozzle that uses is divided into following a few class substantially: the first kind is improved on wikipedia type nozzle basis and is formed, and is characterized in utilizing convergence-expansion shape venturi to improve gas flow rate and gas-liquid two-phase speed difference with the increase intensity (referring to CN2069757U) that atomizes as far as possible; Second class is target spray nozzle (referring to US4434049), its principle is that feed oil forms high-speed jet bump metallic target under the High Pressure Difference effect, carries out the atomizing first time with the crossflow effect again, forms the gas-liquid two-phase atomized flow, quicken at shower nozzle spout place at last, realize secondary-atomizing.This nozzle atomization intensity height, but need very high feed pressure and more atomizing steam, thereby energy consumption is higher, has increased the investment of production cost and scrap build; The 3rd class is a hybrid feed nozzle (referring to CN2054461U) in two venturis; The 4th class is two-fluid rotarytype injector (referring to CN2356752Y), has wherein adopted the two-phase cyclone.
More than the shortcoming that exists of all kinds of nozzles be: atomizing particle size is bigger, and Suo Taier diameter (cold examination) is mostly more than 60 microns; The spouting velocity that has excessive (cause flowing instability and mechanical oscillation occur), the atomizing that has is inhomogeneous; The required feed pressure of the nozzle that also has is higher, atomizing steam is more, causes energy consumption higher.
Summary of the invention
The purpose of this utility model provides a kind of catalytic cracking feed nozzle, to solve the higher and more energy consumption that causes of atomizing steam of the existing atomizing particle size of existing catalytic cracking feed nozzle is big, spouting velocity is excessive, atomizing is inhomogeneous, required feed pressure than problems such as height.
For addressing the above problem, the technical solution adopted in the utility model is: a kind of catalytic cracking feed nozzle, be provided with the mouth body, feed pipe, the primary steam inlet tube, the mouth body has a mouth intracoelomic cavity, the port of export of mouth body is provided with shower nozzle, shower nozzle is provided with spout, it is characterized in that: the other end of mouth body is provided with eddy flow section Taper Pipe and eddy flow section pipe successively, the inside of eddy flow section Taper Pipe and eddy flow section pipe forms the eddy flow chamber, feed pipe tangentially is connected on the eddy flow section pipe along eddy flow section pipe, the outer end of eddy flow section pipe is provided with capping, the primary steam inlet tube is located in the capping, the inner chamber of mouth body is provided with mouth body internals and indirect steam distributor, one end of mouth body internals links to each other with eddy flow section Taper Pipe, the other end links to each other with an end of indirect steam distributor by linkage section, the other end of indirect steam distributor links to each other with shower nozzle, the distribution of steam hole of one circle to the direction inclination of shower nozzle is set on the indirect steam distributor at least, the inside of mouth body internals is cavity, successively by the premix section, contraction section, aditus laryngis section and diffuser are formed, premix section and primary steam inlet tube, feed pipe all communicates with the eddy flow chamber, the internal cavities and the linkage section of mouth body internals, the inner space of indirect steam distributor and shower nozzle forms hybrid chamber, the mouth body, the indirect steam distributor, linkage section, form the secondary air chamber between mouth body internals and the eddy flow section Taper Pipe, the mouth body is provided with the indirect steam inlet tube, communicates with the secondary air chamber.
Adopt the utility model, have following beneficial effect: the mode of charging atomizing makes atomizing effect better (see the explanation of the utility model operating process in this specification specific embodiment part for details).The utility model catalytic cracking feed nozzle shows that after tested generally about 55 microns, the jet velocity at spout place is generally about 60 meter per seconds charging atomizing particle size (Suo Taier diameter).Atomizing is even, and the even index that atomizes can reach more than 3.And, only need to use lower feed pressure (to be generally 0.3～0.6MPa) and less atomizing steam (total consumption of primary atomization steam and secondary-atomizing steam is generally 3～6 weight % of inlet amount), can obtain good atomizing effect, so just reduce the energy consumption of nozzle.In addition, the mixed aerosol mode of atomizing steam and charging, when inlet amount to some extent during increase and decrease, the volume flow of oily vapour two phase flow changes less relatively, can obviously not influence atomization quality, thereby makes that operating flexibility of the present utility model is good, reliability is high.Advantage simple in structure, easy to use, that be easy to promote that the utility model also has.
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.The drawings and specific embodiments do not limit the claimed scope of the utility model.
Description of drawings
Fig. 1 is the utility model catalytic cracking feed nozzle cutaway view vertically.
Fig. 2 is the A-A revolved sectional view among Fig. 1.
Among Fig. 1 and Fig. 2, same reference numerals is represented identical technical characterictic.
The specific embodiment
Referring to Fig. 1, the utility model catalytic cracking feed nozzle (abbreviation nozzle) shown in Figure 2.It is provided with mouth body 7, feed pipe 14, primary steam inlet tube 15.Mouth body 7 has a mouth intracoelomic cavity, and the port of export of mouth body 7 is provided with shower nozzle 2, and shower nozzle 2 is provided with spout 1.Wherein shower nozzle 2 is a conventional structure, and spout 1 can adopt existing flat mouthful or cellular spout (figure slightly) commonly used.
The other end of mouth body 7 is provided with eddy flow section Taper Pipe 13 and eddy flow section pipe 10 successively, and the inside of eddy flow section Taper Pipe 13 and eddy flow section pipe 10 forms eddy flow chamber 17.Feed pipe 14 tangentially is connected on the eddy flow section pipe 10 along eddy flow section pipe 10.The outer end of eddy flow section pipe 10 is provided with capping 18, and primary steam inlet tube 15 is located in the capping 18.
The inner chamber of mouth body 7 is provided with mouth body internals 11 and indirect steam distributor 4.One end of mouth body internals 11 links to each other with eddy flow section Taper Pipe 13, and the other end links to each other with an end of indirect steam distributor 4 by linkage section 41; The other end of indirect steam distributor 4 links to each other with shower nozzle 2.The distribution of steam hole 3 of one circle to the direction inclination of shower nozzle 2 is set on the indirect steam distributor 4 at least.
The inside of mouth body internals 11 is cavity, is made up of premix section 9, contraction section 8, aditus laryngis section 6 and diffuser 5 successively.Premix section 9 and primary steam inlet tube 15, feed pipe 14 all communicate with eddy flow chamber 17.The inner space of the internal cavities of mouth body internals 11 and linkage section 41, indirect steam distributor 4 and shower nozzle 2 forms hybrid chamber, forms secondary air chamber 12 between mouth body 7, indirect steam distributor 4, linkage section 41, mouth body internals 11 and the eddy flow section Taper Pipe 13.Mouth body 7 is provided with indirect steam inlet tube 16, communicates with secondary air chamber 12.
Fig. 1, nozzle shown in Figure 2, the shape of cross section of mouth body 7, feed pipe 14, primary steam inlet tube 15, indirect steam inlet tube 16, eddy flow section pipe 10 is circular, the outside of mouth body internals 11 is cylindrical, eddy flow section Taper Pipe 13, linkage section 41 and indirect steam distributor 4 are round table surface shape, premix section 9 and aditus laryngis section 6 are cylindrical cavity, contraction section 8 and diffuser 5 are the truncated cone-shaped cavity, and the shape of cross section of secondary air chamber 12 is an annular.Except that feed pipe 14 and indirect steam inlet tube 16, remaining element coaxial of nozzle is provided with.
Referring to Fig. 1, main structure parameters of the present utility model is generally as follows: the angle δ of the axial line of feed pipe 14 and nozzle axial line is 30～90 degree, the taper angle theta of eddy flow section Taper Pipe 13 is 30～130 degree, and the cone angle of the cone angle beta of contraction section 8 and diffuser 5 is 5～90 degree.The internal diameter of eddy flow section pipe 10 is 1.0～2.5 with the ratio of the internal diameter of mouth body 7, and the length-to-diameter of aditus laryngis section 6 is 0.5～4.0.1～10 circle distribution of steam hole 3 is set on the indirect steam distributor 4, and every circle is provided with 2～30 distribution of steam holes 3.Distribution of steam hole 3 is a circular port, and diameter is 1～10 millimeter.The angle ε of the axial line in distribution of steam hole 3 and nozzle axial line is 5～90 degree, and the axial line in each the distribution of steam hole 3 on the same circle is identical with the angle of nozzle axial line.
Other unaccounted structural parameters of the utility model need determine according to actual operating position, for example according to inlet amount and once, the consumption of secondary-atomizing steam determines.The total length of nozzle is determined according to the concrete condition at scene.
When the distribution of steam hole 3 more than 2 circles is set on the indirect steam distributor 4, the distribution of steam hole 3 of two adjacent rings preferably is staggeredly arranged, so that secondary-atomizing steam distributes more evenly after being sprayed by each distribution of steam hole 3, and mix more fully with the gas-liquid two-phase atomized flow.
When the distribution of steam hole 3 more than 2 circles is set on the indirect steam distributor 4, each encloses the axial line in distribution of steam hole 3 and the angle of nozzle axial line is preferably reduced successively by inner ring to outer ring, and the differential seat angle at the axial line in two adjacent rings distribution of steam hole 3 and wire clamp angle, nozzle axle center is generally 5～45 degree.Like this, after secondary-atomizing steam is sprayed by each circle distribution of steam hole 3, can be with the inwall of different angles directive shower nozzle 2, the gas-liquid two-phase atomized flow that avoid better entering shower nozzle 2 inner spaces forms viscous flow at the inwall of shower nozzle 2, prevents the appearance of big drop.
The distribution of steam hole 3 of each circle on the indirect steam distributor 4 generally all is evenly to distribute on corresponding each circle, so that secondary-atomizing steam can be equably by each distribution of steam hole 3 ejection.
The material of each parts of the utility model, the metal material of using always for the parts of existing catalytic cracking feed nozzle; The connection of each parts generally all is to adopt welding.
Be that example illustrates operating process of the present utility model with nozzle shown in the accompanying drawing below.Charging (various catalytically cracked stock, for example wax oil, reduced crude, decompression residuum etc.) through feed pipe 14 along eddy flow section pipe 10 tangentially enter eddy flow chamber 17, its turbulence and level of disruption in feed pipe 14 exits is weakened, kinetic energy loss reduces.Primary atomization steam (being generally 250～400 ℃ superheated vapour) enters eddy flow chamber 17 by primary steam inlet tube 15.Charging is rotated mobile in eddy flow chamber 17, and with the primary atomization vapor mixing.Charging afterwards and primary atomization steam enter premix section 9 after eddy flow section Taper Pipe 13 places quicken, flow through after further mixing contraction section 8 (flow velocity increase), aditus laryngis section 6, diffuser 5 (flow velocity reduces), linkage section 41, indirect steam distributor 4 arrive shower nozzle 2.Charging by the generate film, has increased the surface area of liquid, the viscosity that has reduced liquid and surface tension under action of centrifugal force.In whole hybrid chamber, charging is subjected to the effect of primary atomization steam, forms the high intensity turbulent field; Simultaneously, charging is broken under the effect of the instantaneous accidental shearing force that the turbulent flow pulsation produces.In addition, rotational flow prolongs the movement locus of charging in hybrid chamber, has increased the incorporation time with primary atomization steam, has improved the utilization rate and the atomizing effect of water vapour.Charging and primary atomization steam reach maximum at the flow velocity of aditus laryngis section 6, utilize the speed difference between the gas-liquid that charging is broken into very little drop, form the gas-liquid two-phase atomized flow, realize the atomizing of charging.Secondary-atomizing steam (being generally 250～400 ℃ superheated vapour) enters secondary air chamber 12 by indirect steam inlet tube 16, sprays into the hybrid chamber end by the distribution of steam hole 3 on the indirect steam distributor 4 at last, impacts the gas-liquid two-phase atomized flow.This can strengthen the turbulence intensity of gas-liquid two-phase atomized flow, avoids its inwall at shower nozzle 2 to form and remains in a standstill; Can the enhanced feed atomization effect, suppress the generation of liquid film at shower nozzle 2 inwalls, prevent the appearance of big drop.Secondary-atomizing steam by 3 ejections of the distribution of steam hole on the indirect steam distributor 4 is different in nozzle speed in the radial direction with the primary atomization steam that is entered nozzle by primary steam inlet tube 15, thereby can increase the turbulence intensity of gas-liquid two-phase atomized flow, improve the gas-liquid blending effect.After the gas-liquid two-phase atomized flow enters the inner space of shower nozzle 2, quicken at spout 1 place at last, then by spout 1 ejection.Because pressure reduces, the atomizing steam in the gas-liquid two-phase atomized flow expands, and makes the charging drop further broken, realizes the final atomizing (being atomized into evenly tiny drop) of charging.Charging after the atomizing enters riser reactor then and reacts.
Catalytic cracking feed nozzle of the present utility model, generally about 55 microns, the jet velocity at spout 1 place is generally about 60 meter per seconds charging atomizing particle size (Suo Taier diameter).The even index that atomizes can reach more than 3.Feed pressure is generally 0.3～0.6MPa, total consumption of primary atomization steam and secondary-atomizing steam is generally 3～6 weight % (weight % represents percetage by weight) of inlet amount, and primary atomization steam was generally for 2～10 (by weight) with the ratio of the consumption of secondary-atomizing steam.
Claims (3)
1. catalytic cracking feed nozzle, be provided with mouth body (7), feed pipe (14), primary steam inlet tube (15), mouth body (7) has a mouth intracoelomic cavity, the port of export of mouth body (7) is provided with shower nozzle (2), shower nozzle (2) is provided with spout (1), it is characterized in that: the other end of mouth body (7) is provided with eddy flow section Taper Pipe (13) and eddy flow section pipe (10) successively, the inside of eddy flow section Taper Pipe (13) and eddy flow section pipe (10) forms eddy flow chamber (17), feed pipe (14) tangentially is connected on the eddy flow section pipe (10) along eddy flow section pipe (10), the outer end of eddy flow section pipe (10) is provided with capping (18), primary steam inlet tube (15) is located in the capping (18), the inner chamber of mouth body (7) is provided with mouth body internals (11) and indirect steam distributor (4), one end of mouth body internals (11) links to each other with eddy flow section Taper Pipe (13), the other end links to each other with an end of indirect steam distributor (4) by linkage section (41), the other end of indirect steam distributor (4) links to each other with shower nozzle (2), the distribution of steam hole (3) of one circle to the direction inclination of shower nozzle (2) is set on the indirect steam distributor (4) at least, the inside of mouth body internals (11) is cavity, successively by premix section (9), contraction section (8), aditus laryngis section (6) and diffuser (5) are formed, premix section (9) and primary steam inlet tube (15), feed pipe (14) all communicates with eddy flow chamber (17), the internal cavities of mouth body internals (11) and linkage section (41), the inner space of indirect steam distributor (4) and shower nozzle (2) forms hybrid chamber, mouth body (7), indirect steam distributor (4), linkage section (41), form secondary air chamber (12) between mouth body internals (11) and the eddy flow section Taper Pipe (13), mouth body (7) is provided with indirect steam inlet tube (16), communicates with secondary air chamber (12).
2. catalytic cracking feed nozzle according to claim 1, it is characterized in that: mouth body (7), feed pipe (14), primary steam inlet tube (15), indirect steam inlet tube (16), the shape of cross section of eddy flow section pipe (10) is circular, the outside of mouth body internals (11) is cylindrical, eddy flow section Taper Pipe (13), linkage section (41) and indirect steam distributor (4) are round table surface shape, premix section (9) and aditus laryngis section (6) are cylindrical cavity, contraction section (8) and diffuser (5) are the truncated cone-shaped cavity, the axial line of feed pipe (14) and the angle δ of nozzle axial line are 30～90 degree, the taper angle theta of eddy flow section Taper Pipe (13) is 30～130 degree, the cone angle of the cone angle beta of contraction section (8) and diffuser (5) is 5～90 degree, the ratio of the internal diameter of the internal diameter of eddy flow section pipe (10) and mouth body (7) is 1.0～2.5, the length-to-diameter of aditus laryngis section (6) is 0.5～4.0,1～10 circle distribution of steam hole (3) is set on the indirect steam distributor (4), every circle is provided with 2～30 distribution of steam holes (3), distribution of steam hole (3) is a circular port, diameter is 1～10 millimeter, and the axial line of distribution of steam hole (3) and the angle ε of nozzle axial line are 5～90 degree.
3. catalytic cracking feed nozzle according to claim 2, it is characterized in that: the above distribution of steam hole (3) of 2 circles is set on the indirect steam distributor (4), the distribution of steam hole (3) of two adjacent rings is staggeredly arranged, each encloses the axial line in distribution of steam hole (3) and the angle of nozzle axial line is reduced successively by inner ring to outer ring, and the differential seat angle at the axial line in two adjacent rings distribution of steam hole (3) and wire clamp angle, nozzle axle center is 5～45 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205033155U CN201776201U (en) | 2010-08-21 | 2010-08-21 | Catalytic cracking feeding spray nozzle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205033155U CN201776201U (en) | 2010-08-21 | 2010-08-21 | Catalytic cracking feeding spray nozzle |
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| CN201776201U true CN201776201U (en) | 2011-03-30 |
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| CN2010205033155U Expired - Lifetime CN201776201U (en) | 2010-08-21 | 2010-08-21 | Catalytic cracking feeding spray nozzle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103008138A (en) * | 2012-12-14 | 2013-04-03 | 中国石油大学(北京) | Reversed-spraying wet-method smoke washing 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 |
-
2010
- 2010-08-21 CN CN2010205033155U patent/CN201776201U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103008138A (en) * | 2012-12-14 | 2013-04-03 | 中国石油大学(北京) | Reversed-spraying wet-method smoke washing nozzle |
| CN103008138B (en) * | 2012-12-14 | 2015-10-28 | 中国石油大学(北京) | A kind of reverse spray type wet flue gas Washing spray 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 | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Co-patentee after: Luoyang Petrochemical Engineering Corporation /SINOPEC Patentee after: Sinopec Corp. Co-patentee after: Sinopec Guangzhou Engineering Co., Ltd. Address before: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Co-patentee before: Luoyang Petrochemical Engineering Co., China Petrochemical Group Patentee before: Sinopec Corp. Co-patentee before: Guangzhou Zhongyuan Petroleum and Chemical Engineering Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110330 |