CN102019158B - Tubular gas-liquid reactor capable of realizing synchronization of rotational flow and injection - Google Patents
Tubular gas-liquid reactor capable of realizing synchronization of rotational flow and injection Download PDFInfo
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- CN102019158B CN102019158B CN 201010526062 CN201010526062A CN102019158B CN 102019158 B CN102019158 B CN 102019158B CN 201010526062 CN201010526062 CN 201010526062 CN 201010526062 A CN201010526062 A CN 201010526062A CN 102019158 B CN102019158 B CN 102019158B
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Abstract
The invention provides a tubular gas-liquid reactor capable of realizing synchronization of rotational flow and injection, relating to chemical equipment. The tubular gas-liquid reactor capable of realizing synchronization of rotational flow and injection comprises a gas-liquid reaction tube, a gas-liquid mixing spiral element, a gas injection pipe, a jacket heat exchange tube, a liquid inflow tube and the like, wherein the gas-liquid mixing spiral element is composed of a plurality of spiral laminas, and the circumference of the gas-liquid mixing spiral element is welded on the surface of the gas injection pipe in a uniform distribution mode; the wall of the gas injection pipe is provided with a through hole, and the through hole is distributed uniformly along a spiral channel and form an included angle with the tangential plane of the gas injection pipe surface. While increasing gas-liquid contact length, gas pressure is used to push the liquid to flow, thus reducing resistance consumption of a system. The gas-liquid reactor has the advantages that the gas-liquid injection mixing and rotational flow static mixing are synchronized, the structure is simple, the operation is stable, and the mass transfer effect is good. The gas-liquid reactor is suitable for various industry fields, particularly for a reactor of which the gas-liquid flow ratio is required to be in a larger range.
Description
Technical field
The present invention relates to a kind of chemical industry equipment, particularly relate to a kind of eddy flow and spray the tubular type gas-liquid reactor of synchronizeing.
Background technology
In many chemical processes such as hydrogenation, chlorination, sulfonation, tail gas absorption, Liquid Flow, mixing and mass transfer are a kind of important modes of production.Typical gas-liquid reactor can be divided into tower reactor, tank reactor, tubular reactor and injection reactor according to its overall structures.Industrial production comprises the requirement of gas-liquid reactor: have higher production intensity; Be conducive to the raising of reaction selectivity; Be conducive to reduce energy consumption; Be conducive to the control of reaction temperature; Can work under less fluid flow rate.Various reactors all have the scope of application and pluses and minuses separately, any reactor all can not satisfy above-mentioned requirements fully, but fully utilize the advantage of two or more reactor, reactor is carried out structure optimization, just can design the high efficiency reactor that satisfies multiple reaction requirement.The bearing capacity of the existing tubular reactor of gas-liquid reactor of the present invention is high, volume is little, specific area is large, back-mixing is few, response parameter is easy to the advantages such as control, has again the injection reactor compact conformation, operates the advantages such as reliable, good mixed effect and mass transfer effect.
Summary of the invention
The object of the present invention is to provide a kind of eddy flow and spray the tubular type gas-liquid reactor of synchronizeing.Can realize that Gas-Liquid Dispersion spray to be mixed and cyclone-static mixes the tubular reactor with screw element that synchronously carries out, this reactor has that bearing capacity is high, volume is little, specific area is large, back-mixing is few, response parameter is easy to control.
The objective of the invention is to be achieved through the following technical solutions:
The tubular type gas-liquid reactor that eddy flow is synchronizeed with injection, include left-handed spiral plate, right hand helix plate, reach gas injection tube, gas liquid reaction pipe, jacket for heat exchange pipe, liquid inflow pipe that tube wall has through hole, on the circumferencial direction of left-handed spiral plate, right hand helix plate, even partition has gas liquid reaction pipe and the formed annulus of gas injection tube; Be more than 2 or 2 in the spiral plate quantity on same cross section, its rotation direction is identical, mixed cell of formation; The spiral plate rotation direction of adjacent mixed cell is opposite, and is provided with angle at the mixed cell intersection, and its angle is half of adjacent spiral plate angle; Spiral plate is inboard welded with gas injection tube; Fit with the gas liquid reaction inside pipe wall in the spiral plate outside, its gap is less than 1mm; The pitch of spiral plate is 1 ~ 4 times of gas liquid reaction bore, and its torsion angle is between 90 ° ~ 270 °.
The tubular type gas-liquid reactor that described eddy flow is synchronizeed with injection, described injection tube wall has through hole, the helical duct that its through hole forms along the mixed cell spiral plate, on tube wall Spiral distribution uniformly, through hole becomes angle with the section on gas injection tube surface, and its angle is between 30 ° ~ 90 °; Through-hole diameter is more than 2mm; The playpipe radius wall thickness is not less than 3mm; On playpipe along not perforate in rear 1 ~ 3 mixed cell length range of fluid overall flow direction.
Described eddy flow with spray the tubular type gas-liquid reactor synchronize, its described gas liquid reaction pipe diameter be radial height that gas sprays surpass reaction tube and playpipe gap 1/2; The length of gas liquid reaction pipe is that the fluid time of staying is greater than the time meter of gas liquid reaction; Be connected with welding or flange between gas liquid reaction pipe and gas dispersion playpipe.
The tubular type gas-liquid reactor that described eddy flow is synchronizeed with injection, the angle between described liquid inflow pipe and gas-liquid reactor axis is not more than 90 °; Spacing between liquid inflow pipe and first hybrid element is 0.5 ~ 1.0 times of reactor diameter.
Advantage of the present invention and effect are:
1. mass-transfer efficiency is high, and the gas-liquid fluid is disperseing under injection and cyclone-static mixing synchronous effect, and gas-liquid mixed is even, and is larger than phase contact area, and mass tranfer coefficient is high;
2. bearing capacity is strong, and this gas-liquid reactor caliber is less, can bear higher gas-liquid pressure medium, can be applied to the reaction under high pressure operating mode;
3. can effectively solve the fuel factor problem of gas liquid reaction, the reactor cross section temperature is even, and reaction effect is good, and can realize controlling along the alternating temperature of pipe range direction;
4. alternative autoclave or tower reactor, make the continuous operation type reactor;
5. Fluid Flow in A near piston flow, without air-teturning mixed phenomenon, has effectively been avoided the generation of side reaction, has improved product purity;
6. each mixed cell by forming an integral body with the gas injection tube welding, is convenient to maintenance and cleans;
7. for different application scenarios and operating condition, flexibly changing circulation passage number and gas jetting hole diameter and quantity reach optimization.
Description of drawings
Fig. 1 is hybrid element and gas injection tube assembly structure figure;
Fig. 2 is hybrid element and gas injection tube A-A cross-sectional view;
Fig. 3 is gas-liquid injection pipe cutaway view;
Fig. 4 is the tubular type gas-liquid reactor Installation Example picture that eddy flow is synchronizeed with injection.
The specific embodiment
The present invention is described in detail with reference to the accompanying drawings.
In figure: 1 is left-handed spiral plate, and 2 is the right hand helix plate, and 3 is gas injection tube, and 4 are the gas liquid reaction pipe, and 5 is the liquid inflow pipe, and 6 is the jacket for heat exchange pipe, and 7 for heat transferring medium enters (going out) mouthful pipe, and 8 manage for heat transferring medium goes out (entering) mouth.
Be gas jetting hole quantity,
Be the gas jetting hole diameter,
Be gas jetting hole axis and the surperficial angle of reaction tube,
Dotted line represents orientation, spiral plate place, the corresponding cross section of adjacent mixed cell,
Be the adjacent spiral plate angle of same mixed cell,
For the corresponding spiral plate angle in the corresponding cross section of adjacent mixed cell, generally get
Tubular reactor provided by the present invention, can form radial flow fields in the flow process of gas-liquid fluid in helical duct, make the gas-liquid in flow section distribute more even, the gas-liquid fluid is when flowing through the hybrid element interface simultaneously, due to the adjacent mixed cell angle that staggers, gas-liquid can be subject to the dissection of next mixed cell spiral plate, and larger gas group separates under the effect of shearing force, form less bubble, make than phase contact area increase, mass-transfer efficiency and improve.The gas injection tube wall has through hole, through hole evenly distributes along helical duct spiral on tube wall that the mixed cell spiral plate forms, and through hole becomes angle with section, gas injection tube surface, this angle is between 30 °～90 °, the angle of inclination is when increasing gas-liquid contact length, utilize gas pressure to promote liquid flow, can reduce SR consumption.Through-hole diameter and quantity depend on gas flow and pressure drop requirement, more than saying that from machining angle through-hole diameter is preferably 2mm; Spraying caliber should determine according to gas flow, and wall thickness is not less than 3mm and has certain wall length to guarantee flight firm welding and inclined via-hole; On playpipe along not perforate in rear 1～3 mixed cell length range of fluid overall flow direction, to guarantee that all fluids all are subject to gas-liquid injection and mix and to mix two kinds of effects with cyclone-static.Present three aspects of the acting body of gas injection tube: the one, the fixed connecting piece of spiral plate had both guaranteed axially and the circumferentially location of spiral plate, had guaranteed again the location of whole hybrid element in the gas liquid reaction pipe; The 2nd, the drainage dispersion pipe of gas, gas flows to the center of reactor by this pipe, because tube wall axially evenly has through hole circumferential reaching, gas is spread out by these through holes and the different liquid contact that circumferentially reaches axial location, has realized the dispersion mixing of gas-liquid; The 3rd, gas ejector, owing to having the less through hole of diameter on tube wall, each through hole is equivalent to a nozzle to a certain extent, and gas sprays and makes liquid dispersion become droplet, has increased the gas-liquid contact area, has strengthened mixed effect, has strengthened mass transfer.
The gas liquid reaction pipe is the space of gas-liquid mixed mass transfer, and its diameter depends on the gas-liquid flow, and its length depends on reaction speed.Under the prerequisite that satisfies the system pressure drop requirement, gas liquid reaction pipe diameter should guarantee that the radial height that gas sprays surpasses 1/2 of reaction tube and playpipe annular space.The gas liquid reaction length of tube will guarantee the fluid time of staying more than or equal to the gas liquid reaction time, should strictly control the relation of both diameters for chain reaction.Can adopt welding or flange to be connected between gas liquid reaction pipe and gas dispersion playpipe.Contain solid particle when liquid viscosity in large or gas and should adopt the flange connection, so that maintenance and the cleaning of hybrid element and gas dispersion playpipe, but answer the seal request of strict guarantee flange.Gas liquid reaction often is accompanied by heat release or heat absorption, may be strong heat release or strong heat absorption sometimes.Utilize the jacket for heat exchange pipe can effectively solve the fuel factor problem of gas liquid reaction.Diameter (gas liquid reaction pipe diameter) generally less (usually below DN200) due to tubular reactor, and the thread mixing element is housed in this reactor, reduced the radial symmetry gradient in Liquid Flow zone, attenuate thermal-boundary-leyer thickness, improved convection transfer rate, thereby utilize the stable control that heat transferring medium in the jacket for heat exchange pipe can realization response tube fluid temperature, avoided the generation of the side reaction that causes due to non-uniform temperature.Utilize the jacket for heat exchange pipe also can realize the segmentation alternating temperature control of gas liquid reaction, be about to the jacket for heat exchange pipe and be divided into several parts, each several part passes into the heat transferring medium of different temperatures (or enthalpy) just can realize the alternating temperature control of gas liquid reaction, thereby obtains different product.
Eddy flow of the present invention can be widely used in the occasion of carrying out continuously gas-liquid mixed and reaction with the tubular type gas-liquid reactor that injection is synchronizeed, and is used for substituting existing stirred-tank reactor, sprays tank reactor or tower reactor.Batch reactor of the present invention can be arranged vertically, horizontally disposed, be in tilted layout; But can single use also serial or parallel connection use, serial or parallel connection can adopt docking or adopt tube connector to connect when using, connected mode can adopt welding or flange to connect.
Below be the example of the present invention aspect ethoxylation.
Oxirane (EO) is called ethoxylation with the reaction that many organic compounds (initiator) that contain active hydrogen carry out the open loop addition, use different initiators can obtain hundreds of products such as polyethylene glycol, non-ionic surface active agent, these ethoxylated products are very important chemical intermediate and fine chemical products in modern industry.In view of to the vast demand of ethoxylated product and to the importance of national economy, to research, the exploitation of ethoxylation device and to improve be the major issue that EO deep processing field is paid close attention to always.Ethoxylation is the special polymerisation of a class, reacts strong heat release, and reactant oxirane chemical property is active, inflammable and explosive, easy decomposition, poisonous, is high-risk chemical, and is very high to the security requirement of device.At present the ethoxylation device type of document and patent report is nearly 200 kinds, and wherein Buss loop reactor (VLR) and Press circulation spray reactor (STLR) are more advanced, most widely used two kinds of reactors at present.The machinery-free drive disk assembly of these two kinds of reactors own, the security that has improved reactor is all shifted out reaction heat by external heat exchanger, and has increased the gas-liquid contact area by the high velocity jet of circulation fluid, has strengthened mass transfer.The essence of Buss loop reactor and Press circulation spray reactor is effective combination of injection reactor and tank reactor, thereby possessed the advantages such as mass-transfer efficiency is high, work safety, but these two kinds of reactors also have the weakness of himself, such as the ethoxylation gas liquid reaction be semicontinuous reaction, reactor volume comparatively huge, need the additional external heat exchanger, equipment investment cost is large etc.Tubular type gas-liquid reactor of the present invention had both kept the characteristics of Buss loop reactor and Press circulation spray reactor, had overcome again the defective of these two kinds of reactors.
Tubular type gas-liquid reactor of the present invention take phenol as initiator, carries out addition reaction with oxirane as the ethoxylation device under the effect of alkali (potassium hydroxide) catalyst.Reactor diameter (gas liquid reaction pipe) is DN80mm, and length is 800mm, and the mixed cell port number is 3, and gas jetting hole quantity is 120, and diameter is 3mm, and gas jetting hole shaft angle degree is 45 °.Gas phase oxirane enters gas injection tube under self pressure-acting, the liquid phase initiator enters the gas liquid reaction pipe under the effect of pump.Oxirane is under the peptizaiton of spraying the tube wall through hole, and spouting from aperture equably along circumference and axis direction, the air-flow that ejects enters liquid phase with certain angle of inclination, promotes the helical flow of liquid phase in helical duct when completing mass transfer.Oxirane is present in helical duct with the micro-bubble form, under the effect of the formed radial flow fields of helical flow, gas-liquid distributes more even, in gas-liquid flow during through the mixed cell interface, gas-liquid particularly gas phase (bubble) under the shear action of next unit spiral plate, complete and disperse to mix, stoped simultaneously the cohesion of minute bubbles, further improved the hybrid reaction effect.Hybrid element is not only strengthened mass transfer, simultaneously can augmentation of heat transfer, pass into the reaction heat of conduction oil in carrying reactor outside timely and effectively in the jacket for heat exchange pipe, and reaction temperature is controlled and is more prone to.Experiment obtains water white liquid glycol phenylate product, and major constituent content is greater than 96%, and diethylene glycol (DEG) phenylate content only has 0.54%, need not to make with extra care just can use, and has greatly reduced cost.Outlet is without bubble, and oxirane has transformed substantially, and conversion ratio is more than 95%.Experimental result shows that this tubular type gas-liquid reactor has improved the space time yield of reactor, and space time yield can reach 1.5kg/ (m
3S), improve nearly 20 times than traditional autoclave operation, and can obtain reliable and stable product.
Claims (4)
- eddy flow with spray the tubular type gas-liquid reactor synchronize, it is characterized in that including left-handed spiral plate (1), right hand helix plate (2), and tube wall has the gas injection tube (3) of through hole, gas liquid reaction pipe (4), jacket for heat exchange pipe (6), liquid inflow pipe (5), heat transferring medium enters/outlet (7), heat transferring medium in/out mouth pipe (8), the diameter of described gas liquid reaction pipe (4) is below DN200, left-handed spiral plate (1), on the circumferencial direction of right hand helix plate (2), even partition has gas liquid reaction pipe and the formed annulus of gas injection tube, be more than 2 or 2 in the spiral plate quantity on same cross section, its rotation direction is identical, mixed cell of formation, the spiral plate rotation direction of adjacent mixed cell is opposite, and is provided with angle at the mixed cell intersection, and its angle is half of adjacent spiral plate angle, spiral plate is inboard welded with gas injection tube, fit with the gas liquid reaction inside pipe wall in the spiral plate outside, its gap is less than 1mm, the pitch of spiral plate is 1 ~ 4 times of gas liquid reaction bore, and its torsion angle is between 90 ° ~ 270 °.
- Eddy flow according to claim 1 with spray the tubular type gas-liquid reactor synchronize, it is characterized in that helical duct that through hole that described injection tube wall has forms along the mixed cell spiral plate, Spiral distribution uniformly on tube wall, through hole becomes angle with the section on gas injection tube surface, and its angle is between 30 ° ~ 90 °; Through-hole diameter is more than 2mm; The playpipe radius wall thickness is not less than 3mm; On playpipe along not perforate in rear 1 ~ 3 mixed cell length range of fluid overall flow direction.
- Eddy flow according to claim 1 with spray the tubular type gas-liquid reactor synchronize, it is characterized in that, described gas liquid reaction pipe diameter be radial height that gas sprays surpass reaction tube and playpipe gap 1/2; The length of gas liquid reaction pipe is that the fluid time of staying is greater than the time meter of gas liquid reaction; Be connected with welding or flange between gas liquid reaction pipe and gas dispersion playpipe.
- Eddy flow according to claim 1 with spray the tubular type gas-liquid reactor synchronize, it is characterized in that, the angle between described liquid inflow pipe and gas-liquid reactor axis is not more than 90 °; Spacing between liquid inflow pipe and first hybrid element is 0.5 ~ 1.0 times of reactor diameter.
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| CN102019158B true CN102019158B (en) | 2013-06-19 |
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| CN102989338A (en) * | 2012-12-27 | 2013-03-27 | 四川省机械研究设计院 | Spiral static mixer |
| CN104587914B (en) * | 2013-10-31 | 2016-08-17 | 中国中化股份有限公司 | A kind of continuous way atomization gas-liquid, liquid film gas-liquid reactor |
| CN103769032A (en) * | 2014-01-10 | 2014-05-07 | 安徽省化工设计院 | Novel tubular reactor |
| CN108031425B (en) * | 2017-11-30 | 2019-12-10 | 西安交通大学 | A bushing type reactor for scrapping TNT alkali hydrolysis |
| CN110152584B (en) * | 2019-06-24 | 2021-11-02 | 中南大学 | Pipeline reactor capable of fully reacting and having self-cleaning function |
| CN112892462A (en) * | 2019-12-03 | 2021-06-04 | 中国石油集团工程股份有限公司 | Gas-liquid mixing device and isomerization system |
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| US4009751A (en) * | 1973-11-09 | 1977-03-01 | Slovenska Vysoka Skola Technika | Method of and apparatus for high intensity heat and/or mass transfer between two or more phases |
| CN1772873A (en) * | 2005-10-21 | 2006-05-17 | 上海理工大学 | Multi-tubular airlift reactor and its inner eddy flow field organizing method |
| CN1962035A (en) * | 2006-10-30 | 2007-05-16 | 西安交通大学 | Spray cyclone bed type gas liquid solid tri-phase reactor |
| CN201848235U (en) * | 2010-11-01 | 2011-06-01 | 沈阳化工大学 | Tube type gas-liquid reactor for synchronous swirling and jetting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3247200B2 (en) * | 1993-04-27 | 2002-01-15 | 花王株式会社 | Gas-liquid contact device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4009751A (en) * | 1973-11-09 | 1977-03-01 | Slovenska Vysoka Skola Technika | Method of and apparatus for high intensity heat and/or mass transfer between two or more phases |
| CN1772873A (en) * | 2005-10-21 | 2006-05-17 | 上海理工大学 | Multi-tubular airlift reactor and its inner eddy flow field organizing method |
| CN1962035A (en) * | 2006-10-30 | 2007-05-16 | 西安交通大学 | Spray cyclone bed type gas liquid solid tri-phase reactor |
| CN201848235U (en) * | 2010-11-01 | 2011-06-01 | 沈阳化工大学 | Tube type gas-liquid reactor for synchronous swirling and jetting |
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