CN103463829B - The rotary packed bed mass transfer of the reverse shearing of air-flow and consersion unit - Google Patents
The rotary packed bed mass transfer of the reverse shearing of air-flow and consersion unit Download PDFInfo
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- CN103463829B CN103463829B CN201310402588.9A CN201310402588A CN103463829B CN 103463829 B CN103463829 B CN 103463829B CN 201310402588 A CN201310402588 A CN 201310402588A CN 103463829 B CN103463829 B CN 103463829B
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Abstract
The invention belongs to the technical field of mass transfer reaction equipment, specifically the rotary packed bed mass transfer of the reverse shearing of a kind of air-flow and consersion unit, solve existing hypergravity equipment Problems existing in mass transferring in gas phase.It comprises revolving bed main body, equipment supporter and transmission device, revolving bed main body comprises upper and lower two parts: collection chamber and main chamber, being provided with in main chamber can the filler rotor of High Rotation Speed, main chamber top connects air inlet pipe, connected drainage pipe bottom main chamber, filler rotor center arranges liquid distribution trough, and liquid distribution trough connects feed tube, collection chamber top connects blast pipe, and the perforate of filler rotor top is communicated with collection chamber.Beneficial effect of the present invention: the shear stress to fluid can be increased, more Momentum Transfer to internal flow, is promoted the boundary layer separation of gas-liquid by filler, and less turbulence is aggravated, and accelerates gas-liquid interface renewal rate, thus reaches the object of strengthening mass transferring in gas phase; Improve run stability, be more suitable for the occasion of large flux; Collection chamber effectively inhibits to carry secretly and operation is balanced to the impact brought with liquid 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 of the gas-film controlled such as rectifying, absorption.
Background technology
High-gravity technology is a kind of disruptive technology strengthening multiphase transport and course of reaction grown up the eighties in 20th century, its principle is in cross_flow rotating packed bed (also referred to as hypergravity machine), filler rotor high-speed rotates and forms Elevated Gravity, the filled shearing atomization of liquid, alternate contact area increases, and surface upgrades result in fast and is greatly strengthened by the facies-controlled mass transfer of liquid, heat transfer and course of reaction.Be mainly used in desulfurization, decarburization, dedusting and nano material at present and the aspect such as prepare.
Rotary packed bed inner rotator conventional is at present monolithic construction, namely the filler in rotor is by single rotating shaft driven rotary, the patent of first high-gravity rotating bed aspect is proposed in 1979 by Imperial Chemical Industries of Britain (ICI), the patent No. is EP0002568, and at home and abroad disclosed patent has also continued this rotor structure substantially successively subsequently.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 subject to frictional force effect after gas enters filler, and the Relative sliding speed between filler is very little, and gas phase interface can not get quick renewal, in filler, the phenomenon of liquid distribution inequality can make mass transfer rate reduce further simultaneously.2004, the research of the people such as DPRao showed, mainly enhanced 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 then suitable with conventional filler tower.2005, ChandraA proposes layer-stepping filler revolving bed (RotatingPackedbedwithSplitPacking first, SP-RPB), by the packing ring that common rotary packed bed interior unitary rotor filler is divided into some circles mutually nested, this improvement improves gas phase and is rotating the tangential sliding velocity in filler.2006, the people such as Reddy have studied the mass-transfer performance of SP-RPB, and result shows that the gas phase of this equipment and Liquid volumetric mass transfer improve 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 of gas phase drag control.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 by the High Rotation Speed of filler, and gas phase less turbulence is not enough, and radially skewness, filler utilization rate is lower; Filler uses foam metal to be directly fixed on lower rotary table, not easily changes, and only relies on the mechanical strength of foam metal self during work, is difficult to the occasion being applied to air, liquid flux.
Summary of the invention
The present invention, in order to solve existing hypergravity equipment Problems existing in 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:
A kind of rotary packed bed mass transfer of the reverse shearing of air-flow and consersion unit, comprise revolving bed main body, equipment supporter and transmission device, revolving bed main body comprises upper and lower two parts: collection chamber and main chamber, being provided with in main chamber can the filler rotor of High Rotation Speed, and main chamber top connects air inlet pipe, connected drainage pipe bottom main chamber, filler rotor center arranges liquid distribution trough, liquid distribution trough connects feed tube, and collection chamber top connects blast pipe, and the perforate of filler rotor top is communicated with collection chamber.
Described filler rotor comprises the top rotary table and lower rotary table that independently rotate, bottom top rotary table and lower rotary table top is 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, top rotary table top is connected with solid shafting, is connected bottom lower rotary table with hollow shaft, hollow shaft top connects liquid distribution trough, connects feed tube bottom hollow shaft.
Bottom described top rotary table and lower rotary table top is respectively arranged with the groove of some concentric annular, and packing ring is fixed in groove, leaves gap in the groove that the free end of packing ring stretches into another rotating disk with the bottom land 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 described filler rotor top perforate 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 on tubular construction, lower sealing cover is connected with top rotary table, lower sealing cover center is uniform arranges some scallop holes, top cover labyrinth and lower sealing cover are provided with labyrinth ring, and top cover labyrinth is embedded in together mutually with the labyrinth ring of lower sealing cover, and the outmost turns of labyrinth ring arranges oil sealing felt collar.
Described packing support is tubular stainless steel coil, the densely covered perforate of circumference, the outer rim of packing support is provided with some form drag parts, described form drag part is described form drag part is Metal Flake projection, be installed vertically on the outer rim of packing support, the arc in the cross section of Metal Flake projection or platform shape.
Described hollow shaft is connected with using swivel joint between feed tube.
Described air inlet pipe connects main chamber through collection chamber.
Described transmission device comprises hollow shaft, solid shafting, belt pulley, belt and motor composition, and negative pulley wheel is all equipped with in hollow shaft and solid shafting outer end, is connected with motor by belt.
Whole revolving bed main body and motor are installed on equipment supporter, and revolving bed main body is fixed on carriage center place by deck, and motor is fixed in the T-slot at the upper and lower position of support, and 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 each circle packing layer edge builds can increase the shear stress to fluid, filler by more Momentum Transfer to internal flow, promote the boundary layer separation of gas-liquid, less turbulence is aggravated, accelerate gas-liquid interface renewal rate, thus reach the object of strengthening mass transferring in gas phase; 2. use porous stainless steel packing support component, improve 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 microcosmic mixability improves.4. first gas out enter collection chamber from rotor center, then discharges through blast pipe.Collection chamber can hold a certain amount of liquid blown out by gas, effectively inhibits to carry secretly operation to be balanced to the impact brought with liquid flooding.
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, 6-belt, 7-equipment supporter, 8-T type groove, 9-motor, 10-belt pulley, 11-main chamber, 12-packing ring, 13-liquid distribution trough, 14-hollow shaft, 15-bearing, 16-axle sleeve I, 17-lower rotary table, 18-top rotary table, 19-top cover labyrinth, 20-collection chamber, 21-shaft sleeve II, 22-solid shafting, 23-oil sealing, 24-lower sealing cover, 25-dividing plate.
Detailed description of the invention
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.Revolving bed main body is divided into collection chamber and lower main chamber two parts, is separated between collection chamber and main chamber by dividing plate; Filler rotor is arranged in main chamber, be made up of the upper and lower rotating disk that can independently rotate, upper lower rotary table is at a distance of 30mm, rotating disk is respectively equipped with concentric annular packing support, inner filling metal wire packing, the filler on upper and lower rotating disk and packing support form mutually nested packing ring, and the thickness of packing ring is 16mm, adjacent packing layer spacing is 8mm, and the outer rim of packing ring installs form drag part; Top rotary table is connected with top solid shafting, and lower rotary table is connected with bottom hollow shaft; Air inlet pipe enters main chamber through collection chamber, and liquid enters the liquid distribution trough of rotor center by hollow shaft, and blast pipe is located at collection chamber top, and discharging tube is located at bottom a body.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, leaves gap, play movable sealing effect with the bottom land of another rotating disk.Packing support is cylindric stainless steel coil, and the densely covered perforate of circumference, 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 made up of top cover labyrinth and lower sealing cover, it 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 oil sealing felt collar and carrys out 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 on tubular construction, lower sealing cover is connected with top rotary table, and 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, be installed vertically on 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, form drag part can cause extremely strong disturbance to the air-flow through filler gap, and gas phase turbulence aggravates.
Described liquid distribution trough is the stainless steel tube of circumferential perforate, and the size in aperture and the number of openings are determined by the process conditions such as flow and flow rate of liquid, and liquid distribution trough is connected with lower rotary table by the screw thread of pipe tail.
In described transmission device, the shaft seal close to rotor place adopts TC type outside framework oil seal, and the outer end of axle adopts oil sealing felt-ring seal; Bed body case junction adopts the sealing of polyurethane rubber circle.
Described hollow shaft is connected by swivel joint with between feed tube, requires that swivel joint has the working strength of the 1500r/min of resistance to ￡ and certain corrosion resistance.
Described transmission device is made up of axle, bearing, bearing holder (housing, cover), belt pulley, belt and motor, upper main shaft is solid shafting, lower main axis is the hollow shaft of internal diameter 16mm, because the cooperation of upper and lower rotating disk requires higher, therefore bearing is the combination of deep groove ball bearing and thrust bearing, turning cylinder can be prevented at the micro-displacement of axis, and axle and bearing are all 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, is connected with motor by belt, and motor speed frequency converter regulates.Whole bed body and motor are installed on equipment supporter, and bed body uses deck to be fixed on carriage center place, and motor is fixed in the T-slot at the upper and lower position of support, and motor set bolt can slide in T-slot, thus regulates the distance between motor and bed body.
Under duty, liquid is transported to the liquid distribution trough of rotor center by hollow shaft, then radially spray from the aperture of distributor, enter the filler of High Rotation Speed, liquid is subject to the dissection of filler, becomes the very little liquid film of yardstick, drop, gas is transported to revolving bed main chamber by air inlet pipe, enter in the filler of rotation along the outer rim of rotor under the promotion of pressure, carry out counter current contacting with liquid, complete absorption or course of reaction.Finally, the liquid thrown away from rotor is intercepted and captured by the shell of main chamber and is flowed down along shell wall, discharges from underlaid discharging tube, and gas then enters collection chamber by rotor center through the perforate in the middle of labyrinth sealing, then discharges from the blast pipe at bed body top.Gas, liquid are constantly sheared by the multiple filling layers of counter-rotating in rotor, repeatedly break-in and distributing again occur, and rotary packed bedly to compare with common, the relative tangentially sliding velocity between gas phase with filler can improve an order of magnitude; Form drag part can promote the turbulent flow of gas phase further, and more kinetic energy is passed to fluid by filler, and tubulence energy increases, and accelerates 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, and this is also the dominant mechanism of the rotary packed bed strengthening mass transfer of the reverse shearing of air-flow.
Claims (9)
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) and collection chamber (20) are isolated by dividing plate (25), being provided with in main chamber (11) can the filler rotor of High Rotation Speed, main chamber (11) top connects air inlet pipe (1), main chamber (11) bottom connected drainage pipe (4), 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), described filler rotor comprises the top rotary table (18) and lower rotary table (17) that independently rotate, top rotary table (18) bottom and lower rotary table (17) top are separately installed with some concentric annular packing supports, described packing support is tubular stainless steel coil, the densely covered perforate of circumference, the outer rim of packing support is provided with some form drag parts, described form drag part is Metal Flake projection, and profile is rectangle or triangle, is installed vertically on the outer rim of packing support.
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 packing support inside is equipped with filler and is formed packing ring (12), packing ring on upper and lower rotating disk is nested against one another, gap is left 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), and hollow shaft (14) top connects liquid distribution trough (13), and 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, leaves gap in the groove that the free end of packing ring stretches into another rotating disk with the bottom land of another rotating disk.
4. the rotary packed bed mass transfer of the reverse shearing of the air-flow according to Claims 2 or 3 and consersion unit, is characterized in that dividing plate (25) center perforate and arrange tubular construction, 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 described filler rotor top perforate is communicated with collection chamber arranges hermetically-sealed construction, described hermetically-sealed construction comprises top cover labyrinth (19) setting up and down and lower sealing cover (24), top cover labyrinth (19) is placed on tubular construction, lower sealing cover (24) is connected with top rotary table (18), lower sealing cover (24) center is uniform arranges some scallop holes, top cover labyrinth and lower sealing cover are provided with labyrinth ring, top cover labyrinth is embedded in together mutually with the labyrinth ring of lower sealing cover, the outmost turns of labyrinth ring arranges 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, is characterized in that air inlet pipe (1) connects main chamber (11) through collection chamber (20).
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 described hollow shaft (14) is connected with using swivel joint (5) between feed tube.
8. the rotary packed bed mass transfer of the reverse shearing of a kind of air-flow according to claim 7 and consersion unit, it is characterized in that described transmission device comprises hollow shaft (14), solid shafting (22), belt pulley (10), belt (6) and motor (9) composition, negative pulley wheel is all equipped with in hollow shaft (14) and solid shafting (22) outer end, is connected with motor (9) by belt (6).
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 whole revolving bed main body (3) and motor (9) are installed on equipment supporter (7), revolving bed main body (3) is fixed on support (7) center by deck, motor (9) is fixed in the T-slot (8) at the upper and lower position of support (7), and motor set bolt can slide in T-slot (8).
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