CN205949091U

CN205949091U - Feed atomizing spray nozzle

Info

Publication number: CN205949091U
Application number: CN201620645209.8U
Authority: CN
Inventors: 郭伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-06-27
Filing date: 2016-06-27
Publication date: 2017-02-15
Anticipated expiration: 2026-06-27

Abstract

The utility model provides a feed atomizing spray nozzle, it includes shower nozzle, outer tube, inner tube, material oil inlet and steam inlet, steam orifice plate, raw oil gets into the inner tube and sharply carries out atomizing first time through throat and expansion section, contraction section again after the shrink through the contraction section, steam in the mixing chamber to raw oil further strike, the breakage, atomizing for the second time promptly, moisture carry -over raw oil gets into the jet exit of shower nozzle, carries out the third level and atomizes, the jet exit of shower nozzle has multiple arrangement, forms broad curtain screen when making the play of moisture carry -over raw materials oil spraying, is favorable to abundant contact, the reaction of raw oil and catalyst, the effectual breakage that reduces the catalyst simultaneously.

Description

A kind of atomizing feed nozzle

Technical field

The utility model belongs to petroleum refining field catalytic cracking unit, and the change cracking relating generally to a kind of multistage atomizing is high Effect feed nozzle.

Background technology

Raw material oil feeding atomizing nozzle is a visual plant of petroleum refining field catalytic cracking unit, and its effect is： First feedstock oil crushed, be atomized as substantial amounts of fine drop, then raw material oil droplet is injected to catalytic cracking riser reactor In, mix with the catalyst in riser reactor, react.Raw material oil feeding atomizing nozzle currently used for catalytic cracking unit Form have a lot, for example, have cast, trunnion type, Y type, spiral blade profile, cone target type and all kinds of target type nozzle, domestic nozzle There is single-tube nozzle, that is, adopt single tube chamber to feed air inlet mixed aerosol, using effect is less desirable.

Nozzle make reaction raw materials become droplet it is therefore an objective to can Quick-gasifying reacting, atomization is not final purpose, Improve reaction effect and be only target.For the reaction result having reached, that is, need to make the liquid atomization, need to make atomization logistics again Distribute in reactor, be critically important especially with catalyst uniform contact.

Further, since the liquid mist such as feedstock oil to be made turns to fine particle, need higher pressure drop and gas flow rate.Existing The gas-liquid atomization logistics of technology high speed is injected directly into reactor, catalyst is washed away broken more serious.

But in actual use, said nozzle more or less has problems with：One is the atomization of feedstock oil Effect needs to be improved further；Two is that the feedstock oil being injected in riser reactor by nozzle is not wide with catalyst contact surface, Reaction effect is not good；Three be the atomization having nozzle to spray raw material oil droplet jet velocity too high, make catalyst breakage serious.

The utility model proposes a kind of atomizing feed nozzle, make feedstock oil obtain multistage atomizing, effectively eliminate major diameter Drop, thus reach the atomizing particle size required by catalytic cracking process.Research to shower nozzle finds, shower nozzle sprays into riser simultaneously The feedstock oil of reactor is contacted with catalyst, reacts insufficient, is because the arrangement form of conventional jet expansion is unfavorable for raw material The diffusion of oil, the utility model proposes four kinds of nozzle structure forms, the jet expansion center line of shower nozzle both sides and nozzle-axis Angle is 0-30 °, nozzle surface from middle part to both sides deflect, be 0-30 ° with radial direction angle, this setting make raw material oil droplet by Nozzle spreads to both sides after spraying into riser reactor, forms broad screen, bigger with the contact surface of catalyst.In addition, spray Mouth outlet is provided with expansion segment, through circulation area expansion segment when raw material oil droplet sprays, because atomization gas density is little, with stream The increase of logical area is slowed down rapidly, reduces the situation of catalyst breakage.

Utility model content

The purpose of this utility model is to provide a kind of atomizing feed nozzle so as to enable the multistage atomizing to feedstock oil, Effectively eliminate major diameter drop, form broader screen so that feedstock oil is more filled with catalyst when nozzle sprays simultaneously Point contact, reaction.

For solving the above problems, the technical solution of the utility model is：

A kind of atomizing feed nozzle, described nozzle include shower nozzle, outer tube, inner tube, raw material oil-in, steam inlet and Steam orifice plate；Described steam orifice plate is arranged between inner tube expansion segment and outer tube, shape between steam orifice plate, outer tube and inner tube Circularize cavity and constitute vaporium, and in steam orifice plate logistics upstream setting steam inlet, in steam orifice plate and shower nozzle and inner tube Concave regions between outlet constitute mixed aerosol room；Described inner tube has shrinkage expansion range of atomization, that is, have expansion segment, aditus laryngis Section, contraction section；The described multiple steam fumarole of steam orifice plate circle distribution, the multiple jet expansion of shower nozzle circle distribution.

The inner tube of described atomizing feed nozzle can have multiple shrinkage expansion ranges of atomization, that is, have multigroup formation logistics and accelerate Expansion segment, aditus laryngis section and the contraction section slowing down.

The steam orifice plate of above-mentioned atomizing feed nozzle is around the steam fumarole of the N number of φ D of inner tube expansion segment circle distribution, N, D Determined by the treating capacity of feedstock oil.Steam fumarole is corresponded with jet expansion, and that is, number, orientation are all consistent.

Steam fumarole can be located on inner tube expansion segment.

The shower nozzle circumference of described atomizing feed nozzle arranges multiple jet expansions, and the structure setting of jet expansion is trunnion Formula, is made up of contraction section, aditus laryngis section, expansion segment, and this structure can make feedstock oil obtain third level atomization, simultaneously in expansion segment Form deceleration area, effectively solving the problems, such as that raw material oil droplet jet velocity is too high makes catalyst breakage serious；Jet expansion Arrangement may be configured as the various arrangement forms such as circular arrangement that is uniform, oval or limiting vertical direction width；Spray outlet end Surface be designed as in the horizontal direction steering angle be α tangent plane, α be 0-30 °, jet expansion center line in the horizontal direction with shower nozzle Axis angle is β, and β is 0-30 °；It is in fan-shaped to horizontal both sides that arrangement above makes steam carry after feedstock oil is sprayed from jet expansion Expansion, forms broader steam screen, so that feedstock oil is fully reacted with catalyst.

The shower nozzle circumference of described atomizing feed nozzle arranges multiple jet expansions, above spray outlet end face horizontal axis Jet expansion deflects down C1 angle in Way out；Outlet below spray outlet end face horizontal axis is in Way out upwards Deflection C2 angle；The outlet streams of diverse location are made to be pooled to flat area in reactor；In spray outlet end face vertical The corresponding different C1 and C2 numerical value of the outlet of heart line different distance.

In the jet expansion inner surface of shower nozzle or jet expansion contraction section inner surface or jet expansion contraction section and aditus laryngis section Surface could be arranged to many clover shapes, is preferentially set to bunge bedstraw herb shape, and this setting makes third level atomizing steam that feedstock oil is rushed Hit, breaking capacity higher.

Feedstock oil that is heated and having certain pressure enters in inner tube through raw material oil-in, and the contraction section due to inner tube becomes cone Shape, circulation area accelerates to make contraction section inwall to feedstock oil in contraction section further through aditus laryngis section and expansion segment, feedstock oil after shrinking Carry out impacting, crush, make feedstock oil obtain being atomized, due to multigroup expansion segment, aditus laryngis section and receipts can be arranged in inner tube for the first time Contracting section, makes steam carry the multiple acceleration-deceleration of feedstock oil, now impact grinding ability is higher, and atomizing effect is more preferable；Steam is through steaming Vapour entrance enters vaporium, and entrance mixed aerosol room after being accelerated by the multiple steam fumarole of circle distribution on steam orifice plate, Impact, mix with the feedstock oil flowing into mixed aerosol room above by inner tube expansion segment, it is atomized further, even if feedstock oil Obtain second atomization, simultaneously because multiple steam fumaroles of circle distribution, around inner tube expansion segment, form and steam on steam orifice plate Drum carries round feedstock oil and at a high speed feedstock oil flowing, reduces the gathering in side wall region for the big drop, strengthens atomizing effect； Steam carries the jet expansion that feedstock oil enters on shower nozzle, and because jet expansion has contraction section, aditus laryngis section, circulation area is shunk to be made Obtain steam to accelerate feedstock oil is further impacted, crush in contraction section, form third time atomization.It is atomized through three-level, Major diameter drop can be effectively eliminated so that the feedstock oil entering riser reactor is fully contacted, reacts with catalyst, thus Improve reaction yield.

Control due to each jet expansion direction has been carried out with design, carry out the expansion of β angle in the horizontal direction, enter in vertical direction Row C1 and C2 angular direction flow to react outside spray outlet end and converge at atomization logistics jet length L of requirement, so that porous is flowed out Oil and gas logistics formed in reactor flat distribution band, can sufficiently contact with the catalyst in reactor gasification, react. C1 and C2 value is determined by L.

Atomizing feed nozzle of the present utility model, compared with prior art, has following beneficial effect：

1st, using multiple acceleration-deceleration structure to logistics, the speed difference of atomization gas and liquid is made repeatedly to change realization many Level atomization, effectively eliminates major diameter drop, thus reaching the atomizing particle size required by catalytic cracking process；

2nd, this jet expansion arrangement form makes steam carry after feedstock oil sprays and forms broader and flat steam oil gas Screen, so that feedstock oil and catalyst are fully contacted, react, improves yield；

3rd, this jet expansion is provided with deceleration area, solves that raw material oil droplet jet velocity is too high to make catalyst breakage serious Problem.

Brief description

Fig. 1-Fig. 9 is atomizing feed nozzle structure chart, specifically：

Fig. 1：Atomizing feed nozzle structural representation；

Fig. 2：Inner tube 7 arranges the atomizing feed nozzle structural representation of multigroup scaling section；

Fig. 3：The structural representation of A-A sectional view；

Fig. 4：Steam fumarole 4A is arranged on the atomizing feed nozzle structural representation on inner tube 7 expansion segment 9；

Fig. 5-8：The schematic diagram of four kinds of structures of shower nozzle 8；

Fig. 9：The structural representation of C-C sectional view.

In figure：1st, raw material oil-in, 2, steam inlet, 3, vaporium, 4, steam orifice plate, 5, mixed aerosol room, 6, outer tube, 7th, inner tube, 8, shower nozzle, 9, expansion segment, 10, aditus laryngis section, 11, contraction section, 4A, steam fumarole, 8A, jet expansion, 8B, nozzle go out Mouth expansion segment, 8C, jet expansion aditus laryngis section, 8D, jet expansion contraction section, α, spray outlet end surfaces horizontal direction inclination angle Degree, β, jet expansion center line horizontal direction angle, A1, inner tube expansion segment angle, B1, internal tube shrinks section angle, A2, nozzle go out Mouth expansion angle, B2, jet expansion converging angles, jet expansion vertical direction inclination angle above C1, shower nozzle horizontal axis, C2, Jet expansion vertical direction inclination angle below shower nozzle horizontal axis, a, jet expansion vertical direction distributing position, b, jet expansion Horizontal direction distributing position, the atomization logistics jet length that L, reaction require, φ 1, jet expansion throat diameter, φ 2, leafy grass Diameter, φ 3, inner tube aditus laryngis section diameter.

Specific embodiment

With reference to the accompanying drawings and detailed description the utility model is described in further detail it is intended to help reader Understand feature of the present utility model and essence, but the drawings and specific embodiments content is not intended to limit of the present utility model enforcement Scope.

As shown in figure 1, a kind of atomizing feed nozzle, described nozzle include shower nozzle 8, outer tube 6, inner tube 7, raw material oil-in 1, Steam inlet 2 and steam orifice plate 4；Described steam orifice plate 4 is arranged between inner tube 7 expansion segment 9 and outer tube 6, in steam hole Form toroidal cavity between plate 4, outer tube 6 and inner tube 7 and constitute vaporium 3, and in steam orifice plate 4 logistics upstream setting steam inlet 2, the concave regions between steam orifice plate 4 and shower nozzle 8 and inner tube 7 outlet constitute mixed aerosol room 5；Described inner tube 7 has receipts Range of atomization is opened in reducing and expansion, that is, have expansion segment 9, aditus laryngis section 10, contraction section 11；Described steam orifice plate 4 circle distribution multiple steam spray Hole 4A, shower nozzle 8 circle distribution multiple jet expansion 8A.

As shown in Fig. 2 the inner tube 7 of described atomizing feed nozzle can have multiple shrinkage expansion ranges of atomization, that is, have multigroup Expansion segment 9, aditus laryngis section 10 and contraction section 11, are 3 groups in this example.

As shown in figure 3, the steam orifice plate 4 of above-mentioned atomizing feed nozzle is around the N number of φ D's of inner tube 7 expansion segment 9 circle distribution Steam fumarole 4A, N, D are determined by the treating capacity of feedstock oil.Steam fumarole 4A is corresponded with jet expansion 8A, i.e. number, orientation All consistent.

As shown in figure 4, steam fumarole 4A can be located on inner tube 7 expansion segment 9.

As shown in Fig. 5,6,7, shower nozzle 8 circumference arranges multiple jet expansion 8A, and the structure setting of jet expansion 8A is trunnion Formula, is made up of jet expansion contraction section 8D, jet expansion aditus laryngis section 8C, jet expansion expansion segment 8B, this structure can make former Material oil obtains third level atomization, forms deceleration area in jet expansion expansion segment 8B simultaneously, effectively solves the injection of raw material oil droplet The too high problem making catalyst breakage serious of speed；The arrangement of jet expansion 8A may be configured as circular uniform, oval or limits The various arrangement form such as arrangement of vertical direction width；It is α's that the surface of shower nozzle 8 port of export is designed as steering angle in the horizontal direction Tangent plane, α be 0-30 °, jet expansion 8A center line in the horizontal direction with shower nozzle axis angle be β, β be 0-30 °；Arrangement above makes Steam carries feedstock oil and forms broader steam screen in fan-shaped to both sides expansion from after jet expansion 8A ejection, so that Feedstock oil is fully reacted with catalyst.

As shown in figure 9, the jet expansion 8A above shower nozzle 8 exit end face horizontal axis deflects down C1 angle in Way out Degree；Jet expansion 8A below shower nozzle 8 exit end face horizontal axis upward deflects C2 angle in Way out；Make diverse location Outlet streams are pooled to flat area in reactor；Outlet away from the vertical center line different distance of shower nozzle 8 exit end face corresponds to Different C1 and C2 numerical value.

As shown in figure 8, the jet expansion 8A inner surface of shower nozzle 8 or jet expansion contraction section 8D inner surface or jet expansion are received Contracting section 8D and jet expansion aditus laryngis section 8C inner surface setting are many clover shapes, are preferentially set to bunge bedstraw herb shape, this setting makes the 3rd Level atomizing steam is higher to the impact of feedstock oil, breaking capacity.

Feedstock oil that is heated and having certain pressure enters in inner tube 7 through raw material oil-in 1, due to the contraction section of inner tube 7 11 is tapered, and circulation area accelerates to make contraction section 11 in contraction section 11 further through aditus laryngis section 10 and expansion segment 9, feedstock oil after shrinking Inwall carries out to feedstock oil impacting, crushes, and makes feedstock oil obtain being atomized for the first time, can arrange multigroup expansion due in inner tube 7 Section 9, aditus laryngis section 10 and contraction section 11, make steam carry the multiple acceleration-deceleration of feedstock oil, now impact grinding ability is higher, atomization Effect is more preferable；Steam enters vaporium 3 through steam inlet 2, and by multiple steam fumarole 4A of circle distribution on steam orifice plate 4 Enter mixed aerosol room 5 after acceleration, impact, mix with the feedstock oil flowing into mixed aerosol room 5 above by inner tube 7 expansion segment 9, It is atomized further, even if feedstock oil obtains second atomization, simultaneously because on steam orifice plate 4 circle distribution multiple steam Spray orifice 4A around inner tube 7 expansion segment 9, forms steamdrum and carries round feedstock oil and at a high speed feedstock oil flowing, the big drop of minimizing In the gathering in side wall region, strengthen atomizing effect；Steam carries the jet expansion 8A that feedstock oil enters on shower nozzle 8, due to nozzle Outlet 8A has jet expansion contraction section 8D, jet expansion aditus laryngis section 8C, and circulation area is shunk and steam is shunk in jet expansion Section 8D accelerates feedstock oil is further impacted, crushes, and forms third time and is atomized.Through three-level atomization, can effectively disappear Except major diameter drop so that the feedstock oil entering riser reactor is fully contacted, reacts with catalyst, thus improve reaction receiving Rate.

Control due to each jet expansion 8A direction has been carried out with design, carry out the expansion of β angle in the horizontal direction, in vertical direction Carry out C1 and C2 angular direction and flow to converging at atomization logistics jet length L reacting requirement outside shower nozzle 8 port of export, make porous flow The oil and gas logistics going out forms flat distribution band in reactor, sufficiently can contact gasification, instead with the catalyst in reactor Should.C1 and C2 value is determined by L.

Claims

1. a kind of atomizing feed nozzle is it is characterised in that it includes shower nozzle（8）, outer tube（6）, inner tube（7）, raw material oil-in （1）, steam inlet（2）, and steam orifice plate（4）；Described steam orifice plate（4）It is arranged on inner tube（7）Expansion segment（9）With outer tube （6）Between, in steam orifice plate（4）, outer tube（6）And inner tube（7）Between formed toroidal cavity constitute vaporium（3）, and in steam Orifice plate（4）Logistics upstream setting steam inlet（2）, in steam orifice plate（4）With shower nozzle（8）And inner tube（7）Spill area between outlet Domain constitutes mixed aerosol room（5）；Described inner tube（7）There is shrinkage expansion range of atomization, that is, have expansion segment（9）, aditus laryngis section（10）, Contraction section（11）；Described steam orifice plate（4）The multiple steam fumarole of circle distribution（4A）, shower nozzle（8）The multiple nozzle of circle distribution Outlet（8A）.

2. atomizing feed nozzle as claimed in claim 1 is it is characterised in that the inner tube of atomizing feed nozzle（7）There are multiple receipts Range of atomization is opened in reducing and expansion, that is, have multigroup expansion segment（9）, aditus laryngis section（10）And contraction section（11）.

3. atomizing feed nozzle as claimed in claim 1 is it is characterised in that the steam orifice plate of atomizing feed nozzle（4）Around Inner tube（7）Expansion segment（9）The steam fumarole of circle distribution N number of φ D（4A）, N, D are determined by the treating capacity of feedstock oil；Steam fumarole （4A）With jet expansion（8A）Correspond, that is, number, orientation are all consistent.

4. atomizing feed nozzle as claimed in claim 1 is it is characterised in that steam fumarole（4A）It is arranged on inner tube（7）Expansion Section（9）On.

5. atomizing feed nozzle as claimed in claim 1 is it is characterised in that shower nozzle（8）Circumference arranges multiple jet expansions （8A）, jet expansion（8A）Structure setting be by jet expansion contraction section（8D）, jet expansion aditus laryngis section（8C）, nozzle goes out Mouth expansion segment（8B）Composition.

6. the atomizing feed nozzle as described in claim 1 or 5 is it is characterised in that jet expansion（8A）Arrangement be set to justify Shape is uniform, oval or arrangement spread pattern that limit vertical direction width.

7. atomizing feed nozzle as claimed in claim 1 is it is characterised in that shower nozzle（8）The surface of the port of export is in the horizontal direction It is designed as the tangent plane that inclination angle is α, α is 0-30 °, jet expansion（8A）Center line in the horizontal direction with shower nozzle axis angle be β, β is 0-30 °.

8. atomizing feed nozzle as claimed in claim 1 is it is characterised in that shower nozzle（8）Above exit end face horizontal axis Jet expansion（8A）Deflect down C1 angle in Way out；Shower nozzle（8）Jet expansion below exit end face horizontal axis （8A）Upward deflect C2 angle in Way out；The outlet streams of diverse location are made to be pooled to flat area in reactor；Away from Shower nozzle（8）The outlet different C1 and C2 numerical value of correspondence of exit end face vertical center line different distance, C1 and C2 is by reacting requirement Atomization logistics jet length L value determine.

9. atomizing feed nozzle as claimed in claim 1 is it is characterised in that the jet expansion of shower nozzle (8)（8A）Inner surface or Jet expansion contraction section（8D）Inner surface or jet expansion contraction section（8D）With jet expansion aditus laryngis section（8C）Inner surface setting is Many clover shapes.