CN205650204U

CN205650204U - Whirl - injection type entry gas -liquid diffuser

Info

Publication number: CN205650204U
Application number: CN201620037170.1U
Authority: CN
Inventors: 冯斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-01-15
Filing date: 2016-01-15
Publication date: 2016-10-19
Anticipated expiration: 2026-01-15

Abstract

The utility model discloses a whirl injection type entry gas -liquid diffuser, it have atomizing that gaseous phase stream flows the liquid phase and diffusivity effect obviously, spray the characteristics that the homogeneity is high. The entry sombrero body and hollow circular cone bucket body pass through the meeting stile and have constituteed first order ring nozzle, the plectane of improving level is installed the below of flat round mouth under hollow circular cone bucket body and has been constituteed second level ring nozzle, outer barrel outside, including the spiral downtake, 6 8 has individual hollow helix blade constituteed 6 in the centre 8 individual helical coiled passage, down on the lower part of upper portion and the outer barrel of hollow circular cone bucket body flat round mouth installation together, the below of the flat round mouth of troops under one's command is connected the slat through the arc and has been installed antidrip stream and adjust round tapered plate and formed third level ring nozzle down. The utility model discloses an install in various downflow system fixed -bed hydrogenation reactor.

Description

A kind of eddy flow - Ejection-type entrance gas-liquid diffuser

Technical field

This utility model relates to chemical machinery technical field, and specifically, it is the injection in a kind of oil or coal tar refining hydrogenation reactor-ejection-type entrance gas-liquid diffuser.

Background technology

In recent years, fast development and the enhancing of environmental consciousness along with global economy, domestic environmental regulation is the strictest, requirement to cleaner fuels is more and more higher, petroleum refining and coal chemical industry enterprises are had to the product quality improving self various oil product, and oil hydrogenation technology is one of most efficient method improving oil quality.The height of hydrogenation technique technical merit, depends primarily on the quality of Hydrogenation raw oil pretreatment, the performance of hydrogenation catalyst (protective agent) and three principal elements of hydrogenation reactor internals.At present, in order to improve the quality of fuel oil hydrogenation reaction, it is necessary for improving the reactivity of hydrogenation catalyst, but, use highly active catalyst, once gas phase stream is bad to the diffusibility of liquid phase stream, " locally channel " region that beds arises that, this many resistance of regional area liquid phase stream is big, thus causes gas phase stream the most on the low side, i.e. " local lacks hydrogen " problem is serious.In the presence of when hydrogen dissolution degree in liquid phase stream is relatively low and does not reaches two kinds of situations of hydrogen in hydrogenation reaction while, it it is exactly serious " lacking hydrogen " phenomenon, now there is " hot localised points " in this region, residual condensed-nuclei aromatics etc. in unsaturated hydrocarbons or heavy oil product, it is very easy to the adverse reactions such as building-up reactions, polycondensation reaction and condensation reaction, causes catalyst surface carbon deposit to lose activity, reduce service life of hydrogenation catalyst.

How to improve the quality of hydrogenation reaction and extend the service life of catalyst, also depending on advance and the reasonability of reactor inner member to a great extent.Wherein inlet diffuser is first inner member that biphase gas and liquid flow flows through after hydrogenation reactor top entry enters, analyze and in hydraulics cold model experiment at the inlet diffuser hydraulic analogy commonly used at present, it appeared that problems with: 1, gas phase stream is very poor to diffusion and the convection action of liquid phase stream；2, the speed that hydrogen dissolves to liquid phase stream is the highest；3, the Biased flow phenomenon that liquid phase stream is sprayed onto on distribution plate circular section, reactor gas-liquid top is serious.

At present, the inlet diffuser structure commonly used both at home and abroad as shown in Figures 1 and 2, it substantially by outer cylinder body 1, double inverted cone cylinder 2, upper round shrouding 3, lower annulus shrouding 4, central dividing plate 5, upper circular slab 6 with holes, under plectane 7 with holes, connection board 8 and location-plate 9 constitute.Lower annulus shrouding 4 center has circular hole 41, it is arranged at the inner port 11 bottom outer cylinder body 1, the bottom of double inverted cone cylinder 2 is arranged at the centre bore inward flange 42 of lower annulus shrouding 4, the outward flange of upper round shrouding 3 is arranged in the upper port 21 of double inverted cone cylinder 2, on the upper surface being arranged on lower annulus shrouding 4 below of central dividing plate 5, top be arranged on the lower surface of round shrouding 3, and according to centrage align.Two pairs of rectangular slat entrances 100 thus it are combined into；Upper circular slab 6 with holes is provided with circular port 61, under plectane 7 with holes be provided with lower circular port 71, upper circular slab 6 with holes is arranged on the lower section of lower annulus shrouding 4, and leaves certain radial clearance, nozzle ring 200 on composition；Under plectane 7 with holes be arranged on the lower section of circular slab 6 with holes, also leave certain radial clearance, the lower nozzle ring 300 of composition；The top of connection board 8 is arranged on the following of lower annulus shrouding 4, and the top of middle convex is installed on circular slab 6 with holes, and bottom is arranged on down on the upper surface of plectane 7 with holes.

During work: the biphase gas and liquid flow entered from reactor head entrance, it is introduced into the inside of outer cylinder body 1, respectively from the head-on collision of the two pairs of rectangular slat mouths 100 enter (gas phase stream then to its upper, liquid phase stream is then in bottom), two strands just to reverse flow formed head-on collision after, fall at the center hole 41 of lower annulus shrouding 4 together, spraying from upper nozzle ring 200 and upper circular port 61 the most respectively, in upper circular port 61, the biphase gas and liquid flow of ejection shunts again and sprays from lower nozzle ring 300 and lower circular port 71.

The major defect of above-mentioned this existing inlet diffuser is: 1, due to biphase gas and liquid flow respectively enteing up and down from two pairs of rectangular slat mouths respectively, the gas phase stream on top is the most very poor to diffusibility and the heat convection of the liquid phase stream of bottom, the drop size not only sprayed downwards is big but also Biased flow phenomenon is serious, liquid phase stream unit volume specific surface area is little, therefore hydrogen is low to the diffusion of liquid phase stream oil product, dissolution velocity is slow；2, biphase gas and liquid flow sprays respectively at upper nozzle ring, upper circular port, lower nozzle ring and lower circular port etc. tens, the liquid phase stream got off in original top is serious with regard to Biased flow phenomenon, add percent opening the highest, therefore liquid phase stream can not be by the gas-liquid top distribution plate being sprayed onto reactor equably, the most large-scale reactor problem of non-uniform is even more serious.

As can be seen here, existing hydrogenation reactor inner member technology does not catch up with the developing steps of novel hydrogenation catalyst, is just govern the development of oil hydrogenation technology.Therefore, advanced, rational reactor inner member will be greatly improved the effect in hydrogenation reactor of the novel hydrogenation catalyst.

In order to make to carry out effective heat exchange and the hydrogen solubility increased in liquid phase stream by strong convection mode and high diffusivity mode between liquid phase stream and gas phase stream, i.e. gas phase stream to the height of the fogging degree of liquid phase stream with low, and whether can be sprayed at equably in reactor head end socket space, make reactor gas-liquid top distribution plate obtain the extraordinary biphase gas and liquid flow of the uniformity, be exploitation various hydrogenation reactors novel inlet diffuser architectural characteristic faced by a big problem.

Summary of the invention

The purpose of this utility model is exactly to solve the problems such as the atomization of above-mentioned prior art and poor diffusivity, sprinkling Biased flow phenomenon be serious, it is provided that a kind of gas phase stream to the atomization of liquid phase stream and diffusibility effect substantially, spray hydrogenation reactor inward eddy-ejection-type entrance gas-liquid diffuser that uniformity is high

The technical solution of the utility model is achieved in that a kind of eddy flow-ejection-type entrance gas-liquid diffuser, it is characterised in that: it is mainly connected the components such as batten by outer cylinder body, entrance umbrella crown body, upper hollow cone bucket body, upper horizontal plectane, spiral down-comer, cored screw blade, lower hollow cone bucket body, anti-drip regulation cone plate, arc.Wherein, cylinder utilizes the location ring plectane on top to be arranged in hydrogenation reactor, for positioning at reactor inlet and supporting whole assembly, entrance umbrella crown body and hollow cone bucket body connect location by meeting stile, on circular cone bucket, the outward flange of flat round mouth welds with inwall ring in the middle part of cylinder, composition entrance umbrella crown body upper, hollow cone bucket body under, cylinder assembly outside, forms first order nozzle ring；Upper horizontal plectane is arranged on spiral down-comer top, and is in the lower section of flat round mouth under hollow cone bucket body, and leaves certain interval, constitutes second level nozzle ring；Outside, including spiral down-comer, 6-8 cored screw blade (0.25-1 pitch), in centre, is combined into 6-8 helical duct to outer cylinder body；Lower hollow cone bucket body upper, anti-drip regulation cone plate under, connect batten by arc and be vertically connected with and leave certain interval, be combined into third level nozzle ring.The radian of the arc-shaped steel bar part that arc lower connects batten is adjustable, and the diameter of the anti-drip regulation cone horizontal plectane of plate inner ring should be less than declining the internal diameter of flat round mouth under anemostat down-comer；The coning angle of anti-drip regulation cone plate is 60 °-120 ° and defines down dish shape.

The Main Function of a combination thereof body first order shape nozzle and second level nozzle ring is that the biphase gas and liquid flow just entered is carried out prediffusion and premixing, it is ensured that 6-8, bottom helical duct can obtain more uniform liquid phase stream.When gas-liquid two phase flow is by helical duct, under centrifugal action, the liquid phase stream that rotation declines defines the well-proportioned liquid film of thickness and is in lower hollow cone bucket body upper surface, defining hollow cylinder at lower hollow cone bucket body bottom port and rotate liquid curtain, the horizontal gas phase stream sprayed by third level nozzle ring is drawn among gas phase stream and atomization becomes fine mist.Thus define the extraordinary nebulization region of uniformity in end socket space, hydrogenation reactor top, reach the purpose being evenly distributed in the gas-liquid top distribution plate of reactor, stopped the serious Biased flow phenomenon of legacy inlet diffuser.

Compared with prior art, the utility model has the advantages that: 1, gas phase stream is fine to the atomizing effect of liquid phase stream, improves the Convention diffusion of biphase gas and liquid flow, less droplet is conducive to increasing the hydrogen dissolution velocity to liquid phase stream and meltage；2, by premixing Convention diffusion and the relatively high uniformity of rotation liquid film, it is ensured that biphase gas and liquid flow can relatively evenly spray in the end socket space of reactor head, make the liquid absorption size of each gas-liquid allotter of distribution in gas-liquid top distribution plate basically identical.

Accompanying drawing explanation

Fig. 1 is the overall structure schematic diagram of existing hydrogenation reactor inlet diffuser.

Fig. 2 is the schematic top plan view of existing hydrogenation reactor inlet diffuser.

Fig. 3 is the overall structure schematic diagram of utility model.

Fig. 4 is entrance umbrella crown body schematic diagram.

Fig. 5 is upper hollow cone bucket body schematic diagram.

Fig. 6 is cored screw blade schematic diagram.

Fig. 7 is lower hollow cone bucket body schematic diagram.

Fig. 8 is arc lower connection strap schematic diagram.

Fig. 9 is the schematic diagram of anti-drip regulation cone plate 9.

Detailed description of the invention

Embodiment 1:

Below in conjunction with the accompanying drawings, this utility model is described further: all parts of the present utility model all can use rustless steel to make.It is mainly connected the component such as batten 8, anti-drip regulation cone plate 9 by outer cylinder body 1, entrance umbrella crown body 2, upper hollow cone bucket body 3, upper horizontal plectane 4, spiral down-comer 5, cored screw blade 6, lower hollow cone bucket body 7, arc.Wherein, the location ring plectane 12 of outer cylinder body 1 upper weld, for positioning at reactor inlet and supporting whole assembly, lower port is welded with lower hollow cone bucket body 7；Entrance umbrella crown body 2 is circular cone umbrella body, is processed into circular cone umbrella body lower circle port 22 below, and welds three to four meeting stiles 21, for upper port be flat round mouth 31 on circular cone bucket, lower port be that the hollow cone bucket body 3 of flat round mouth 32 under circular cone bucket is located by connecting；After on upper circular cone bucket, flat round mouth 31 outward flange welds with inwall ring in the middle part of cylinder 1, composition entrance umbrella crown body 2 upper, hollow cone bucket body 3 under, cylinder 1 assembly outside, form first order nozzle ring 100.Its effect is: the very poor biphase gas and liquid flow 101 of the uniformity got off from top, after first order nozzle ring 100 sprays, can be relatively evenly distributed under upper circular cone bucket, at flat round mouth 32, to become more uniform upper low speed ring-shaped liquid curtain 33；

Upper horizontal plectane 4 is arranged on the upper level port of spiral down-comer 5, and it is arranged under circular cone bucket below flat round mouth 32, constitute second level nozzle ring 200, it upper low speed ring-shaped liquid curtain 33 is drawn among two grades of horizontal gas flows 201 and is atomized by it by two-stage ring shape negative pressuren zone 202 produced by the horizontal gas flow 201 sprayed；

6-8 cored screw blade 6 is arranged between outer cylinder body 1 and spiral down-comer 5, thus form 6-8 helical duct 61, biphase gas and liquid flow is during 6-8 helical duct 61, under centrifugal action, liquid phase stream is forced, near outer cylinder body 1 hypomere inwall, to form the hollow liquid film of more uniform rotation 74；

On the circular cone bucket of lower hollow cone bucket body 7, flat round mouth 71 welds together with the lower flat mouth 12 of outer cylinder body 1, constitutes sealing structure；

Anti-drip regulation cone plate 9 is arranged under the circular cone bucket of lower hollow cone bucket body 7 below flat round mouth 72, connect batten 8 by arc to be vertically connected with, under circular cone bucket, the horizontal plectane in top 91 of flat round mouth 72 and anti-drip regulation cone plate 9 leaves that can gap, constitute third level nozzle ring 300, wherein push up the diameter of horizontal plectane 91 than the little 5-15mm of flat round mouth 72 internal orifice diameter under circular cone bucket.From annular negative pressuren zone 302 produced by the horizontal gas flow 301 of third level nozzle ring 300 intermediate injection, hollow for rotation liquid film 74 is drawn among horizontal gas flow 301, and is atomized by it；

Disc structure 93 bottom anti-drip cone governor shape plectane 9, in some absorption negative pressuren zones above turbination 92 outward flange liquid is sucked into can be made, again cut into mist droplet by gas phase stream, middle drip phenomenon so can be effectively stoped to produce, if not disc structure, but flat board or downwardly convex shape, the surface tension between liquid will promote lower liquid to center flow, ultimately cause the generation of middle drip phenomenon.With this, it is achieved the purpose of this utility model.

Claims

null1. eddy flow-ejection-type entrance gas-liquid diffuser，It includes outer cylinder body (1)、Entrance umbrella crown body (2)、Upper hollow cone bucket body (3)、Upper horizontal plectane (4)、Spiral down-comer (5)、Cored screw blade (6)、Lower hollow cone bucket body (7)、Arc connects batten (8)、Anti-drip regulation cone plate (9)，It is characterized in that: outer cylinder body (1) utilizes location ring plectane (11) on top to be arranged in hydrogenation reactor，Entrance umbrella crown body (2) and hollow cone bucket body (3) connect location by meeting stile (21)，On the upper circular cone bucket of hollow cone bucket body (3), the outward flange of flat round mouth I (31) welds with outer cylinder body (1) inwall，Upper horizontal plectane (4) is arranged on the upper level port of spiral down-comer (5)，Cored screw blade (6) is arranged between outer cylinder body (1) and spiral down-comer (5)，On the circular cone bucket of lower hollow cone bucket body (7), flat round mouth II (71) welds together with the lower flat mouth (12) of outer cylinder body (1)，The two ends up and down that anti-drip regulation cone plate (9) utilizes arc to connect batten (8) are welded under the circular cone bucket of lower hollow cone bucket body (7) flat round mouth IV (72) below.
A kind of eddy flow-ejection-type entrance gas-liquid diffuser the most according to claim 1, it is characterised in that: entrance umbrella crown body (2) be the coning angle of solid circular cone umbrella body be 90 °-120；The coning angle of anti-drip regulation cone plate (9) is 90 °-120 °, and its top is provided with circular flat board (91), is down disc structure (93) bottom it.
A kind of eddy flow-ejection-type entrance gas-liquid diffuser the most according to claim 1, it is characterised in that: upper hollow cone bucket body (3) is hollow cone bucket body, and its coning angle is 90 °-120 °;Lower hollow cone bucket body (7) is hollow cone bucket body, and its coning angle is 90 °-120 °.
A kind of eddy flow-ejection-type entrance gas-liquid diffuser the most according to claim 1, it is characterised in that: 6-8 cored screw blade (6) stroke is 0.25-0.5 pitch.
5. according to a kind of eddy flow described in claim 1,2 or 3-ejection-type entrance gas-liquid diffuser, it is characterised in that: upper horizontal plectane (4) is arranged on spiral down-comer (5) the top mouth of pipe.
A kind of eddy flow-ejection-type entrance gas-liquid diffuser the most according to claim 1, it is characterised in that: the radian at camber steel bar part (81) place that arc lower connects batten (8) is adjustable.
A kind of eddy flow-ejection-type entrance gas-liquid diffuser the most according to claim 1, it is characterised in that: circular cone umbrella body lower circle port (22) of entrance umbrella crown body (2) is arranged on the top of hollow cone bucket body (3), constitutes first order nozzle ring (100).
8. according to a kind of eddy flow described in claim 1 or 3-ejection-type entrance gas-liquid diffuser, it is characterized in that: under the circular cone bucket of hollow cone bucket body (3), flat round mouth III (32) lower section is mounted with horizontal plectane (4), leaves certain gap and constitutes second level nozzle ring (200).
9. according to a kind of eddy flow described in claim 1 or 3-ejection-type entrance gas-liquid diffuser, it is characterised in that: outside, including spiral down-comer (5), 6-8 cored screw blade (6), in centre, constitutes 6-8 helical duct (61) to outer cylinder body (1).
10. according to a kind of eddy flow described in claim 1,6 or 7-ejection-type entrance gas-liquid diffuser, it is characterized in that: lower flat round mouth (72) lower section of lower hollow cone bucket body (7) is mounted with anti-drip regulation cone plate (9), and connect batten (8) by arc lower and be vertically connected with, and leave certain gap and constitute third level nozzle ring (300).
11. a kind of eddy flow-ejection-type entrance gas-liquid diffusers according to claim 8, it is characterized in that: lower flat round mouth (72) lower section of lower hollow cone bucket body (7) is mounted with anti-drip regulation cone plate (9), and connect batten (8) by arc lower and be vertically connected with, and leave certain gap and constitute third level nozzle ring (300).