CN103463829A - Mass transfer and reaction equipment for reverse airflow shearing and rotating packed bed - Google Patents
Mass transfer and reaction equipment for reverse airflow shearing and rotating packed bed Download PDFInfo
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- CN103463829A CN103463829A CN2013104025889A CN201310402588A CN103463829A CN 103463829 A CN103463829 A CN 103463829A CN 2013104025889 A CN2013104025889 A CN 2013104025889A CN 201310402588 A CN201310402588 A CN 201310402588A CN 103463829 A CN103463829 A CN 103463829A
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Abstract
The invention belongs to the technical field of mass transfer reaction equipment, and particularly relates to mass transfer and reaction equipment for a reverse airflow shearing and rotating packed bed which solves the problems of the existing ultragravity equipment in the aspect of air phase mass transfer. The mass transfer and reaction equipment comprises a rotating bed main body, an equipment bracket and a transmission device, wherein the rotating bed main body comprises an upper part and a lower part which are an air collection chamber and a main cavity; the main cavity is internally provided with a packing rotor capable of rotating at a high speed; the upper part of the main cavity is connected with an air inlet pipe; the bottom of the main cavity is connected with a drainage pipe; the center of the packing rotor is provided with a liquid distributor; the liquid distributor is connected with a liquid inlet pipe; the top of the air collection chamber is connected with an exhaust pipe; an opening in the top of the packing rotor is communicated with the air collection chamber. The mass transfer and reaction equipment has the beneficial effects that the shearing stress for fluid can be increased, more momentum is transferred to interior fluid by packing, the boundary layer separation of air liquid is promoted, the degree of turbulence is increased, and the update rate of air liquid interface is increased, and thus the purpose of strengthening the air phase mass transfer is achieved; the operation stability is improved, and the equipment is suitable for high throughput occasions; the air collection chamber effectively inhibits the influences on operation balance caused by entrainment and flooding.
Description
Technical field
The invention belongs to the technical field of chemical industry, petrochemical industry, environmental protection mass transfer reaction equipment, be specifically related to the rotary packed bed mass transfer of the reverse shearing of a kind of air-flow and consersion unit, can be used for the mass transport process strengthening that the air films such as rectifying, absorption are controlled.
Background technology
High-gravity technology is a kind of disruptive technology of strengthening heterogeneous transfer reaction process grown up the eighties in 20th century, its principle is in hypergravity rotary packed bed (also referred to as hypergravity machine), the filler rotor high-speed rotates to form Elevated Gravity, liquid is sheared atomization by filler, alternate contact area increases, and surface is upgraded and caused being greatly strengthened by the facies-controlled mass transfer of liquid, heat transfer and course of reaction fast.Be mainly used at present the aspects such as prepared by desulfurization, decarburization, dedusting and nano material.
Rotary packed bed inner rotator commonly used is monolithic construction at present, be that the interior filler of rotor is by single rotating shaft driven rotary, the patent of first high-gravity rotating bed aspect is proposed in 1979 by Britain Imperial Chemical Industries (ICI), the patent No. is EP0002568, subsequently at home and abroad successively disclosed patent also substantially continued this rotor structure.Calendar year 2001, the people such as Sandilya study discovery, the mass transferring in gas phase process of carrying out in rotary packed bed, also low than in packed tower of its mass tranfer coefficient, reason is to be subject to the frictional force effect after gas enters filler, very little with the relative sliding velocity between filler, gas phase interface can not get quick renewal, and in filler, the phenomenon of liquid distribution inequality can make mass transfer rate further reduce simultaneously.2004, the people's such as D P Rao research showed, mainly strengthened the mass transfer in liquid phase process in high-gravity rotating bed, and under super gravity field, the use of high-specific surface area filler is its main cause, and gas phase mass transfer coefficient is suitable with the conventional filler tower.2005, Chandra A has proposed layer-stepping filler revolving bed (Rotating Packed bed with Split Packing first, SP-RPB), common rotary packed bed interior unitary rotor filler is divided into to the mutually nested packing ring of some circles, and this improvement has improved the tangential sliding velocity of gas phase in the rotation filler.2006, the people such as Reddy studied the mass-transfer performance of SP-RPB, and result shows that the gas phase of this equipment and liquid phase volume mass tranfer coefficient have improved nearly 2 orders of magnitude than common revolving bed.The people such as Agarwal have done a series of rectifying and absorption experiment with SP-RPB, and result shows that SP-RPB is particularly suitable for strengthening the mass transport process that gas phase drag is controlled.But there are some problems equally in SP-RPB, as: rotor center or little by paracentral position radius of turn, gas is difficult to obtain larger tangential velocity, gas phase less turbulence deficiency by the High Rotation Speed of filler, and skewness radially, the filler utilization rate is lower; Filler is used foam metal directly to be fixed on lower rotary table, is difficult for changing, and only relies on the mechanical strength of foam metal self during work, is difficult to be applied to the occasion of atmosphere, liquid flux.
Summary of the invention
The present invention, in order to solve existing hypergravity equipment in the problem existed aspect mass transferring in gas phase, provides the rotary packed bed mass transfer of the reverse shearing of a kind of air-flow and consersion unit, can be applicable to the occasion that flux is large, processing requirements is high.
The present invention adopts following technical scheme to realize:
The rotary packed bed mass transfer of the reverse shearing of a kind of air-flow and consersion unit, comprise revolving bed main body, equipment supporter and transmission device, the revolving bed main body comprises upper and lower two parts: collection chamber and main chamber, but be provided with the filler rotor of High Rotation Speed in main chamber, main chamber top connects air inlet pipe, main chamber's bottom connected drainage pipe, the filler rotor center arranges liquid distribution trough, liquid distribution trough connects feed tube, and the collection chamber top connects blast pipe, and the perforate of filler rotor top is communicated with collection chamber.
Described filler rotor comprises top rotary table and the lower rotary table of independent rotation respectively, top rotary table bottom and lower rotary table top are separately installed with some concentric annular packing supports, packing support inside is filled with filler and forms packing ring, the setting nested against one another of packing ring on upper and lower rotating disk, leave gap between adjacent packing ring, the top rotary table top is connected with solid shafting, and the lower rotary table bottom is connected with hollow shaft, the hollow shaft top connects liquid distribution trough, and the hollow shaft bottom connects feed tube.
Described top rotary table bottom and lower rotary table top are respectively arranged with the groove of some concentric annular, and packing ring is fixed in groove, and it is interior and leave gap with the bottom land of another rotating disk that the free end of packing ring stretches into the groove of another rotating disk.
Main chamber and collection chamber are isolated by dividing plate, and the perforate of dividing plate center also arranges tubular construction, and solid shafting is connected with top rotary table through this hole.
The position that the perforate of described filler rotor top is communicated with collection chamber arranges hermetically-sealed construction, described hermetically-sealed construction comprises top cover labyrinth setting up and down and lower sealing cover, top cover labyrinth is placed in tubular construction, lower sealing cover is connected with top rotary table, the lower sealing cover center is uniform arranges some scallop holes, upper and lower seal cover is provided with labyrinth ring, and the labyrinth ring of upper and lower seal cover is embedded in together mutually, and the outmost turns of labyrinth ring arranges the oil sealing felt collar.
Described packing support is the tubular stainless steel coil, circumferentially densely covered perforate, the outer rim of packing support is provided with some form drag parts, described form drag part is that described form drag part is Metal Flake projection, at right angle setting is in the outer rim of packing support, the arc in the cross section of Metal Flake projection or platform shape.
Between described hollow shaft and feed tube, use swivel joint to be connected.
Described air inlet pipe connects main chamber through collection chamber.
Described transmission device comprises that hollow shaft, solid shafting, belt pulley, belt and motor form, and negative pulley wheel all is equipped with in hollow shaft and solid shafting outer end, by belt, with motor, is connected.
Whole revolving bed main body and motor are installed on equipment supporter, and the revolving bed main body is fixed in the carriage center place by deck, and motor is fixed in the T-slot at the upper and lower position of support, and the motor set bolt can slide in T-slot.
Compared with prior art, the invention has the beneficial effects as follows: 1. the form drag part that respectively encloses packing layer edge structure can increase the shear stress of convection cell, filler by more momentum transfer to internal flow, promote the boundary layer separation of gas-liquid, the less turbulence aggravation, accelerate the gas-liquid interface renewal rate, thereby reach the purpose of strengthening mass transferring in gas phase; 2. use porous stainless steel packing support member, improved run stability, be more suitable for the occasion of large flux, and revolving bed filler used is easy to change; 3. the distribution of gas-liquid fluid in filler is more even, and the microcosmic mixability improves.4. at first gas out enter collection chamber from rotor center, then through blast pipe, discharges.Collection chamber can hold a certain amount of liquid blown out by gas, has effectively suppressed to carry secretly the impact operation balance brought with liquid flooding.
The accompanying drawing explanation
Fig. 1 is the rotary packed bed equipment body schematic diagram of the reverse shearing of air-flow of the present invention;
Fig. 2 is a kind of structural representation of form drag part of the present invention;
Fig. 3 is the another kind of structural representation of form drag part of the present invention;
Fig. 4 is the assembling schematic diagram of packing ring on lower rotary table in the present invention;
Fig. 5 is internal structure schematic diagram of the present invention;
In figure: 1-air inlet pipe, 2-blast pipe, 3-revolving bed main body, 4-discharging tube, 5-swivel joint, the 6-belt, 7-equipment supporter, 8-T type groove, 9-motor, the 10-belt pulley, 11-main chamber, 12-packing ring, 13-liquid distribution trough, the 14-hollow shaft, 15-bearing, 16-axle sleeve I, 17-lower rotary table, the 18-top rotary table, 19-top cover labyrinth, 20-collection chamber, 21-axle sleeve II, 22-solid shafting, 23-oil sealing, 24-lower sealing cover, 25-dividing plate.
The specific embodiment
By reference to the accompanying drawings the specific embodiment of the present invention is described further.
The rotary packed bed mass transfer of the reverse shearing of air-flow and consersion unit, mainly comprise revolving bed main body, equipment supporter and transmission device.The revolving bed main body is divided into collection chamber and lower main chamber two parts, between collection chamber and main chamber, by dividing plate, separates; The filler rotor is arranged in main chamber, by the upper and lower rotating disk that can independently rotate, formed, upper lower rotary table is at a distance of 30mm, the concentric annular packing support respectively is housed on rotating disk, inner filling metal wire packing, the filler on upper and lower rotating disk forms mutually nested packing ring with packing support, and the thickness of packing ring is 16mm, adjacent packing layer spacing is 8mm, and the outer rim of packing ring is installed the form drag part; Top rotary table is connected with top solid shafting, and lower rotary table is connected with the bottom hollow shaft; Air inlet pipe enters main chamber through collection chamber, and liquid is entered the liquid distribution trough of rotor center by hollow shaft, and blast pipe is located at the collection chamber top, and discharging tube is located at a body bottom.The perforate of filler rotor top is communicated with collection chamber.
Described packing ring one end is fixed in the groove that upper and lower rotating disk opens by packing support, and the degree of depth of groove is 10mm, and the free end of packing ring stretches into another rotating disk 6mm, with the bottom land of another rotating disk, leaves gap, plays the movable sealing effect.Packing support is cylindric stainless steel coil, and the perforate of circumferentially gathering, as the passage of fluid.
The position that the perforate of filler rotor top is communicated with collection chamber arranges hermetically-sealed construction, described hermetically-sealed construction is comprised of top cover labyrinth and lower sealing cover, it on seal cover, is the labyrinth ring of thickness 4mm degree of depth 30mm, the labyrinth ring that upper-lower seal covers is embedded in together mutually, and the outmost turns of labyrinth seal arranges the oil sealing felt collar and carrys out the reinforced seal effect.Main chamber and collection chamber are isolated by dividing plate, the perforate of dividing plate center also arranges tubular construction, and solid shafting and Upper shaft sleeve II thereof are connected with top rotary table through tubular construction, and top cover labyrinth is placed in tubular construction, lower sealing cover is connected with top rotary table, and the lower sealing cover center is uniform arranges some scallop holes.The center drilling of upper-lower seal lid is simultaneously again as gas passage.
Described form drag part is Metal Flake projection, at right angle setting is in the outer rim of packing support, the arc in the cross section of Metal Flake projection or platform shape, upper lower rotary table high speed counter-rotating during rotary packed bed work, the form drag part can cause extremely strong disturbance to the air-flow through the filler gap, gas phase turbulence aggravation.
The stainless steel tube that described liquid distribution trough is circumferential perforate, the size in aperture and the number of openings are by the decision of the process conditions such as flow and flow rate of liquid, and liquid distribution trough joins by screw thread and the lower rotary table of pipe tail.
In described transmission device, the shaft seal that approaches the rotor place adopts TC type outside framework oil seal, and the outer end of axle adopts the oil sealing felt-ring seal; Bed body case junction adopts the sealing of polyurethane rubber circle.
Be connected by swivel joint between described hollow shaft and feed tube, require swivel joint to there is the working strength of the 1500r/min of anti-￡ and certain corrosion resistance.
Described transmission device is comprised of axle, bearing, bearing holder (housing, cover), belt pulley, belt and motor, upper main shaft is solid shafting, the hollow shaft that lower main axis is internal diameter 16mm, because the cooperation of upper and lower rotating disk is had relatively high expectations, therefore the combination that bearing is deep groove ball bearing and thrust bearing, can prevent that turning cylinder is at axial micro-displacement, axle and bearing all are arranged in bearing holder (housing, cover), and axle sleeve leaves the duct of apply oil.Negative pulley wheel is equipped with in the upper end of axle, by belt, with motor, is connected, and motor speed is regulated with frequency converter.Whole bed body and motor are installed on equipment supporter, and the bed body is used deck to be fixed in the carriage center place, and motor is fixed in the T-slot at the upper and lower position of support, and the motor set bolt can slide in T-slot, thereby regulate the distance between motor and bed body.
Under duty, liquid is transported to the liquid distribution trough of rotor central authorities by hollow shaft, then from the aperture of distributor, radially spray, enter the filler of High Rotation Speed, liquid is subject to the dissection of filler, becomes liquid film, drop that yardstick is very little, gas is transported to revolving bed main chamber by air inlet pipe, outer rim along rotor under the promotion of pressure enters in the filler of rotation, with liquid, carries out counter current contacting, completes and absorbs or course of reaction.Finally, the liquid thrown away from rotor is intercepted and captured and flows down along shell wall by the shell of main chamber, from underlaid discharging tube, discharges, and gas enters collection chamber by rotor central authorities through the perforate in the middle of labyrinth sealing, then from the blast pipe at bed body top, discharges.Gas, liquid are constantly sheared by the multiple filling layers of counter-rotating in rotor, break-in repeatedly occurs and distribute, and with common rotary packed bed comparing, gas phase can improve an order of magnitude with the relative tangential sliding velocity between filler; The form drag part can further promote the turbulent flow of gas phase, and filler passes to fluid by more kinetic energy, and tubulence energy increases, and has accelerated the boundary renewal rate; The flow trace of gas-liquid is more tortuous, and the time of staying is proper extension also, therefore the mass transfer rate between gas-liquid is greatly improved, this is also the dominant mechanism of the rotary packed bed strengthening mass transfer of the reverse shearing of air-flow.
Claims (10)
1. the rotary packed bed mass transfer of the reverse shearing of air-flow and consersion unit, comprise revolving bed main body (3), equipment supporter (7) and transmission device, it is characterized in that revolving bed main body (3) comprises upper and lower two parts: collection chamber (20) and main chamber (11), main chamber (11) but in be provided with the filler rotor of High Rotation Speed, main chamber (11) top connects air inlet pipe (1), main chamber (11) bottom connected drainage pipe (4), the filler rotor center arranges liquid distribution trough (13), liquid distribution trough (13) connects feed tube, collection chamber (20) top connects blast pipe (2), the perforate of filler rotor top is communicated with collection chamber (20).
2. the rotary packed bed mass transfer of the reverse shearing of air-flow according to claim 1 and consersion unit, it is characterized in that described filler rotor comprises top rotary table (17) and the lower rotary table (17) of independent rotation respectively, top rotary table (18) bottom and lower rotary table (17) top are separately installed with some concentric annular packing supports, packing support inside is equipped with filler and is formed packing ring (12), on, packing ring on lower rotary table is nested against one another, leave gap between adjacent packing ring, top rotary table (18) top is connected with solid shafting (22), lower rotary table (17) bottom is connected with hollow shaft (14), hollow shaft (14) top connects liquid distribution trough (13), hollow shaft (14) bottom connects feed tube.
3. the rotary packed bed mass transfer of the reverse shearing of air-flow according to claim 2 and consersion unit, it is characterized in that described top rotary table (18) bottom and lower rotary table (17) top are respectively arranged with the groove of some concentric annular, packing ring (12) is fixed in groove, and the free end of packing ring stretches in the groove of another rotating disk and leaves gap with the bottom land of another rotating disk.
4. according to the rotary packed bed mass transfer of the reverse shearing of the described air-flow of claim 2 or 3 and consersion unit, it is characterized in that main chamber (11) and collection chamber (20) are by dividing plate (25) isolation, dividing plate (25) center perforate also arranges tubular construction, and solid shafting (22) is connected with top rotary table (18) through this hole.
5. the rotary packed bed mass transfer of the reverse shearing of air-flow according to claim 4 and consersion unit, it is characterized in that the position that the perforate of described filler rotor top is communicated with collection chamber arranges hermetically-sealed construction, described hermetically-sealed construction comprises top cover labyrinth setting up and down (19) and lower sealing cover (24), top cover labyrinth (19) is placed in tubular construction, lower sealing cover (24) is connected with top rotary table (18), lower sealing cover (24) center is uniform arranges some scallop holes, on, lower sealing cover is provided with labyrinth ring, on, the labyrinth ring of lower sealing cover is embedded in together mutually, the outmost turns of labyrinth ring arranges the oil sealing felt collar.
6. the rotary packed bed mass transfer of the reverse shearing of air-flow according to claim 5 and consersion unit, it is characterized in that described packing support is the tubular stainless steel coil, circumferentially densely covered perforate, the outer rim of packing support is provided with some form drag parts, described form drag part is Metal Flake projection, profile is rectangle or triangle, and at right angle setting is in the outer rim of packing support.
7. the rotary packed bed mass transfer of the reverse shearing of air-flow according to claim 6 and consersion unit, is characterized in that air inlet pipe (1) connects main chamber (11) through collection chamber (20).
8. the rotary packed bed mass transfer of the reverse shearing of air-flow according to claim 7 and consersion unit, is characterized in that using swivel joint (5) to be connected between described hollow shaft (14) and feed tube.
9. the rotary packed bed mass transfer of the reverse shearing of a kind of air-flow according to claim 8 and consersion unit, it is characterized in that described transmission device comprises that hollow shaft (14), solid shafting (22), belt pulley (10), belt (6) and motor (9) form, negative pulley wheel all is equipped with in hollow shaft (14) and solid shafting (22) outer end, by belt (6), with motor (9), is connected.
10. the rotary packed bed mass transfer of the reverse shearing of a kind of air-flow according to claim 9 and consersion unit, it is characterized in that whole revolving bed main body (3) and motor (9) are installed on equipment supporter (7), revolving bed main body (3) is fixed in support (7) center by deck, motor (9) is fixed in the T-slot (8) at the upper and lower position of support (7), and the motor set bolt can slide in T-slot (8).
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104521599A (en) * | 2014-12-31 | 2015-04-22 | 山东中昊重工科技有限公司 | Supergravity air cooling equipment capable of removing natural dormancy of deciduous fruit trees |
| CN104567462A (en) * | 2014-12-31 | 2015-04-29 | 魏永阳 | Super-gravity heat exchange process |
| CN107138007A (en) * | 2017-05-19 | 2017-09-08 | 中国矿业大学 | A kind of flue gas processing device of hypergravity from supercharging self-cleaning |
| CN107824003A (en) * | 2017-10-20 | 2018-03-23 | 新中天环保股份有限公司 | Organic solvent recovery process |
| CN108854313A (en) * | 2018-07-10 | 2018-11-23 | 佛山市金净创环保技术有限公司 | A kind of application method of air cleaning unit and the device |
| CN110339804A (en) * | 2019-06-21 | 2019-10-18 | 中北大学 | It is a kind of suitable for inserted rotary packed bed structured packing and its application |
| CN111712315A (en) * | 2017-09-22 | 2020-09-25 | 3C碳捕集股份有限公司 | Gas capture system |
| CN112206698A (en) * | 2020-09-01 | 2021-01-12 | 浙江工业大学 | Baffling type super-gravity rotating bed with integrally rotating rotor |
| RU2743760C1 (en) * | 2020-05-12 | 2021-02-25 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" | Mass exchange apparatus |
| CN114392711A (en) * | 2021-12-27 | 2022-04-26 | 北京化工大学 | Fluid-driven rotary packed bed and application thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104567462A (en) * | 2014-12-31 | 2015-04-29 | 魏永阳 | Super-gravity heat exchange process |
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| CN111712315A (en) * | 2017-09-22 | 2020-09-25 | 3C碳捕集股份有限公司 | Gas capture system |
| CN107824003A (en) * | 2017-10-20 | 2018-03-23 | 新中天环保股份有限公司 | Organic solvent recovery process |
| CN108854313A (en) * | 2018-07-10 | 2018-11-23 | 佛山市金净创环保技术有限公司 | A kind of application method of air cleaning unit and the device |
| CN110339804A (en) * | 2019-06-21 | 2019-10-18 | 中北大学 | It is a kind of suitable for inserted rotary packed bed structured packing and its application |
| RU2743760C1 (en) * | 2020-05-12 | 2021-02-25 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" | Mass exchange apparatus |
| CN112206698A (en) * | 2020-09-01 | 2021-01-12 | 浙江工业大学 | Baffling type super-gravity rotating bed with integrally rotating rotor |
| CN112206698B (en) * | 2020-09-01 | 2022-09-30 | 浙江工业大学 | Baffling type super-gravity rotating bed with integrally rotating rotor |
| CN114392711A (en) * | 2021-12-27 | 2022-04-26 | 北京化工大学 | Fluid-driven rotary packed bed and application thereof |
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| CN103463829B (en) | 2015-11-18 |
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