Scraped agitated film gas-liquid mass transfer reactor
The present invention is a scraped agitated film gas-liquid mass transfer reactor, belongs to the gas-liquid mass transfer consersion unit, particularly utilizes the device of the centrifugal force reinforcement gas-liquid two-phase mass transfer reaction of rotary packed bed generation.
The internal structure of gas-liquid mass transfer reaction unit has multiple.Aspect the filling-material structure of revolving bed, mainly contain the porous media filler especially, as irregular runner fillers such as foam metal, foamed ceramics and wire mesh packings, its gas phase flow resistance is bigger; Also has gasket packing in addition, as BP " improvement of gas-liquid two-phase contact device " (Improve-ments in liquid-gas contact apparatus, the patent No.: the radial radiation shape corrugated plate packing UK1366312) is the gasket packing that belongs to the runner rule, its gas phase flow resistance is less, and is littler than the operation power consumption of porous media filler.But because the plate face of this plate filler is parallel with axle, it is radial to be warp-wise, spacing radially increases progressively between adjacent two plates, therefore have following shortcoming: 1. runner equivalent diameter d and radial distance r are approximated to direct ratio, this makes the interior gas phase flow resistance of revolving bed change greatly along the barometric gradient of warp-wise, and being similar to has dp/dr ∝ 1/r
3, for the unlikely variation of the barometric gradient that makes the revolving bed inner and outer ring is too big, the general value of warp-wise runner of this plate filler is shorter, so that the radially basic keeping parallelism of distance between plates together, is unfavorable for the interphase mass transfer reaction when this has shortened the gas-liquid two-phase contact again; 2. this filler reduces along plate area in the warp-wise unit volume filler, and this makes revolving bed inner ring plate filler too intensive, and outer ring filler is too sparse, is unfavorable for that gas-liquid two-phase fluid mass transfer and flow resistance evenly distribute, and makes whole mass transfer effect variation; 3. because this plate filler is to be connected by loop network, because the sheet number is many, so this rotary packed bed manufacturing, installation, maintenance inconvenience all.With regard to rotation mode, vertical rotation and horizontal rotation are arranged, but vertical revolving bed center of gravity in industrial large-sized equipment is higher, be difficult for stablizing, and horizontal revolving bed center of gravity is lower, controls the vibration of centrifuge easily.Yet existing horizontal revolving bed is because the gas that rotates in the shell can make the liquid driven rotary of adhering on the shell wall liquid can not discharge from the bottom discharging tube swimmingly, thereby cause hydrops in the shell, and operation is unstable.Chinese patent " the horizontal revolving bed of super gravity field of band resistance pumping equipment ", (the patent No.: 91226917.0) proposed the resistance pumping equipment and solved this problem, though but this method can solve the smooth and easy problem of discharge opeing, but annularly flow causes very big body resistance to gas again in the setting of resistance discharge opeing baffle plate, make and still to have following shortcoming and problem: 1. to be flowing in some areas power consumption bigger for gas phase, simultaneously also bring out fluid oscillation easily, be unfavorable for the high speed rotation of centrifuge; 2. gas phase annularly flow speed declines to a great extent, and is unfavorable for that gas-liquid two-phase separates, and is difficult to remove the liquid mist than small particle diameter.
Purpose of the present invention is exactly to change too greatly in order to solve and to overcome the revolving bed inner and outer ring barometric gradient that has horizontal gasket packing revolving bed mass transfer reaction device existence now, make the runner value short, unfavorable interphase mass transfer reaction, whole mass transfer effect is poor, and because of being the plate filler that loop network connects, so the sheet number is many, revolving bed inconvenience is made, install, maintenance, and the horizontal revolving bed of existing band resistance pumping equipment is unfavorable for the high speed rotation of centrifuge, gas phase annularly flow speed is low, the problem and the shortcoming that are unfavorable for gas-liquid two-phase separation etc., research and design is a kind of, and to have between plate a radial flow path equivalent diameter plate area radially constant and the unit volume filler constant along warp-wise, revolving bed has multiple radial corrugation flow passage structure, the runner value can increase, can strengthen the gas-liquid two-phase mass transfer and reduce the gas phase flow resistance, mass transfer effect is good, the mobile power consumption of gas phase is little, and low vapour lock gas-liquid separation groove is arranged, the discharge opeing smoothness helps the high speed rotation of centrifuge, helping gas-liquid two-phase separates, the convenient manufacturing, install, the board-like rotating film type gas-liquid mass transfer reaction unit of maintenance.
The present invention realizes by following proposal: the structural representation of this scraped agitated film gas-liquid mass transfer reactor as shown in Figure 1, it is with donut thin plate filler, it is rotary packed bed that polylith donut thin plate is superimposed as annular solid along axis, make radial flow path equivalent diameter between plate radially constant and rotary packed bed in the filler plate area of unit volume radially constant, and spill gas-liquid separation groove and vertical means T shape gas-liquid flow distribution plate in groove are set in the apparatus housing bottom; It is mainly by the casing 6 of being with the gas-liquid part flow arrangement, it is rotary packed bed that heart annulus thin plate filler 7 constitutes, liquid distribution pipe 4, pneumostop groove 5 and axial exhaust pipe connect and compose, its interconnected relationship is: polylith donut thin plate filler 7 is superimposed along axis, and close to fasten with front/rear end plectane 8 and connect and compose annular solid plate filler revolving bed, constitute the radial flow path structure of multiple shape as shown in Figure 2 between the donut thin plate filler, rotary packed bed by shaft support and place in the casing 6, between rotary packed bed and casing pneumostop groove 5 is set, liquid distribution pipe 4 places on the rotary packed bed central hub line, be connected with the gas-liquid part flow arrangement under the casing 6, the gas-liquid part flow arrangement is made of with the T shape gas-liquid flow distribution plate 9 of vertical fixing in this groove the spill gas-liquid separation groove 11 of casing below, the upper face of T shape gas-liquid flow distribution plate is the akin arc surface of curvature and casing, the lower face of arc surface is a little more than spill gas-liquid separation groove, and constitutes the discharge opeing runner with the casing cambered surface certain interval of being separated by.Wherein: above-mentioned donut thin plate is dull and stereotyped or the corrugated plating of band cyclic rib, radial flow path is the regular runner of ripple symmetry between plate, its flow area radially is equidistant the contraction repeatedly with expansion or constant, but the direction of the center line that flows equidistantly changes, cyclic rib is circumferentially continuous rib or circumferential discontinuous rib, and cyclic rib is donut rib or helical rib; The donut thin plate is to dash the fin plate that the ring-type breach is arranged, fin and plectane interplanar have an angle theta, radial flow path is the regular runner of fin symmetry between plate, between adjacent panels fin be face or equidistantly stagger, the ring-type fin along circumferentially be to the equidistant fork in plectane two sides or to plectane with the one side fork; Its running action principle is: gas enters in the casing 6 along air intake 1, by outer shroud inwardly ring by rotary packed bed, and with produce countercurrent mass transfer by interior hoop outer shroud flowing liquid, discharge by gas outlet 2 at last.Liquid enters through the liquid inlet 3 of liquid distribution pipe 4, radially be sprayed onto on the rotary packed bed inner ring surface, the centrifugal force of the centrifuge that is rotated at a high speed by the utilization of concentric circles ring flat-plate filler becomes thin thin liquid film and drop with liquid dispersion, strengthen gas-liquid mass transfer, liquid is discharged by the revolving bed outer shroud, and casing built-in wall liquid is collected after leakage fluid dram 10 is discharged through the spill gas-liquid separation groove of casing below.The multiple flow passage structure of donut thin plate filler can make liquid film be evenly distributed, and prevents channel and drop is constantly disperseed and butt, quickens the drop Surface Renewal, strengthens the gas-liquid two-phase mass transfer.
The present invention compared with prior art has following advantage and effect: 1. since this with one heart between plectane filler plate the radial flow path equivalent diameter radially constant, make that barometric gradient changes approximate db/dr ∝ 1/r in the radial flow path
2, smooth far beyond the barometric gradient variation of existing radial radiation shape plate filler, this helps prolonging the radial flow path value; 2. because this concentric plectane filler plate constant area of unit volume filler has radially been improved gas-liquid mass transfer and flow resistance distribution in the plate filler greatly; 3. under the condition of equal filler plate area, can significantly reduce the filler plate number of packages more than 10 times, greatly facilitate manufacturing, the I﹠M of device, can reduce cost significantly; 4. because this mass transfer reaction device has gas-liquid separation device, liquid at the attached wall in spill gas-liquid separation groove the place ahead can flow into groove along the slit between groove and T shape gas-liquid flow distribution plate, gas then continues to do annularly flow along T shape plate, because the slit aperture is suitable, minimum to gas body resistance, attached wall liquid can rely on the gravity effect to flow into the slit voluntarily at the rear of gas-liquid separation groove, because the upper face of T shape plate is the curvature cambered surface close with casing, gas can not produce big shear applications to liquid on the casing cambered surface at gas-liquid separation groove rear, and attached wall liquid can flow down discharge more swimmingly; 5. because this mass transfer reaction device can help the high speed rotation of centrifuge, in casing, can keep higher gas annular flow velocity, thereby the less liquid mist of particle diameter also can be separated from gas phase preferably.
Below Figure of description is further specified as follows: Fig. 1 is the structural representation of scraped agitated film gas-liquid mass transfer reactor, and Fig. 2 is apparatus of the present invention concentric circles ring flat-plate filler warp-wise runner structural representation.Among each figure: 1 is that air intake, 2 is that gas outlet, 3 is that liquid inlet, 4 is that liquid distribution pipe, 5 is that pneumostop groove, 6 is that casing, 7 is that donut thin plate, 8 is that end face plectane, 9 is that T shape gas-liquid flow distribution plate, 10 is that leakage fluid dram, 11 is a spill gas-liquid separation groove, and θ is the fin and the plectane plane angle together of fin plate.
Embodiments of the present invention are comparatively simple, and the manufacturing of this gas-liquid mass transfer reaction unit, processing method and technology all can adopt manufacturing, processing method, the technology of the various mass transfer reaction devices of existing patent applied for to make, process, install.Implement the present invention, need only each parts and the assembly that design, add the cost device by Fig. 1, and be connected and installed, and constitute the radial flow path structure of different shape as shown in Figure 2, just can implement the present invention preferably by the described interconnected relationship of top specification.For example, the inventor recommends design directly to be respectively φ 200mm, φ 600mm by 50～100 inner and outer rings, it is rotary packed bed that thickness is that the stainless steel donut thin plate of 0.3～0.5mm is formed by stacking along axis, and its distance between plates can be 1～2mm, and the warp-wise runner is the scaling type corrugated channel between plate.That makes is rotary packed bed by shaft support, be the horizontal annular casing central authorities that are suspended at, the pneumostop groove is set between casing and the revolving bed, make the gas that enters from the casing air intake must could be from axial discharge casing, gas-liquid two-phase reverse flow mass transfer reaction radially in revolving bed through revolving bed.Connect the gas-liquid part flow arrangement in the casing bottom, liquid is discharged from the bottom of shell leakage fluid dram after shunting.
