CN112007481A - Gas-liquid redistribution device and absorption packed tower - Google Patents
Gas-liquid redistribution device and absorption packed tower Download PDFInfo
- Publication number
- CN112007481A CN112007481A CN202010874155.3A CN202010874155A CN112007481A CN 112007481 A CN112007481 A CN 112007481A CN 202010874155 A CN202010874155 A CN 202010874155A CN 112007481 A CN112007481 A CN 112007481A
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- water distributor
- gas
- layer water
- liquid
- absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
- B01D53/185—Liquid distributors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention relates to a gas-liquid redistribution device which comprises an upper-layer water distributor and a lower-layer water distributor, wherein through holes are formed in the upper-layer water distributor and the lower-layer water distributor, a liquid collecting plate is arranged on the upper-layer water distributor and forms a gas channel, a top cap is arranged above the gas channel, the diameter of the through hole of the lower-layer water distributor is smaller than that of the through hole of the upper-layer water distributor, and the diameter of the upper-layer water distributor is larger than that of the lower-layer water distributor. The gas-liquid redistribution device disclosed by the invention is used for carrying out three-level water distribution to separate liquid for multiple times, so that the diameter of water drops is reduced to the maximum extent, the absorption area of absorption liquid is increased, the flowing state of the absorption liquid in the absorption tower is improved, the absorption rate is increased, the power consumption of a pump is reduced, and the resistance of the absorption tower is reduced. The effective distribution of the invention can greatly save the investment of the power equipment of the spraying device and promote the absorption of the absorption liquid.
Description
Technical Field
The invention relates to the technical field of tail gas treatment, in particular to an absorption packed tower.
Background
In the traditional absorption packed tower, which belongs to gas-liquid mass transfer equipment and is widely applied to absorption devices for acid gas, alkaline gas, VOC gas, odor and the like, the full contact of gas and liquid in the absorption packed tower has great influence on the absorption effect of the absorption packed tower.
When the packing of the absorption packed tower is arranged in a layered mode, in order to increase the absorption effect, multi-stage spraying is usually carried out, so that the uniformity of liquid phase absorption is met. If the number of the filling layers is two, secondary spraying is adopted; when the number of the filling layers is three, three-stage spraying is adopted. The spray pump needs to be selected according to the characteristics of spraying, the requirement on the lift is high, and in order to ensure the pressure requirement of an upper-layer spray system, a pressure stabilizing valve or a ball valve is added to a lower-layer spray system for control, so that the manufacturing cost of the absorption packed tower is increased, and the spray effect of the absorption packed tower spray system can be influenced by the opening degree of the pressure stabilizing valve or the ball valve.
Disclosure of Invention
The invention aims to provide a groove type quick separation gas-liquid redistributor which can reduce the diameter of water drops to the maximum and increase the absorption area of absorption liquid.
In order to solve the technical problem, the gas-liquid redistribution device comprises an upper water distributor and a lower water distributor,
the upper layer water distributor and the lower layer water distributor are provided with through holes,
the upper-layer water distributor is provided with a liquid collecting plate which forms an air channel, a top cap is arranged above the air channel,
the diameter of the through hole of the lower layer water distributor is smaller than that of the through hole of the upper layer water distributor,
the diameter of the upper water distributor is larger than that of the lower water distributor.
And a lower-layer secondary water distributor is arranged below the lower-layer water distributor.
And a gas balancing device is arranged between the upper-layer water distributor and the lower-layer water distributor.
The gas balancing device is a guide plate which is vertical or basically vertical to the upper water distributor and the lower water distributor.
The lower secondary water distributor is made of a three-dimensional plastic wire mesh.
And a support rod is arranged in the three-dimensional plastic silk screen, a flexible pipe is connected to the support rod, and the flexible pipe is connected with a fluctuation device.
The wave device comprises a permanent magnet, a coil, a hose filled with liquid and a control circuit, wherein the coil is connected with the control circuit, the coil is sleeved at the front end of the permanent magnet, the front end of the coil is connected with a push plate, the front part of the push plate is connected with a corrugated pipe, and the corrugated pipe is communicated with a flexible pipe.
The end part of the flexible pipe is provided with a second corrugated pipe, and the front end of the second corrugated pipe is provided with a vibrating block connected with the supporting rod.
The invention also relates to an absorption packed tower, which comprises a tower body, wherein the gas-liquid redistribution device and the packing device are arranged in the tower body.
The packing device comprises a support and a connecting pipe fixedly installed on the support, the connecting pipe is provided with a plurality of packing units connected in series on the connecting pipe, each packing unit comprises a disc and a plurality of fiber bundles arranged at the edge of the disc, the connecting pipe is filled with fluid, the upper end of the connecting pipe is connected with a flexible pipe, the flexible pipe stretches out of the upper wall through a small hole to be connected with a fluctuation device, the fluctuation device is connected with the flexible pipe, an L-shaped connecting branch pipe is arranged at the connecting part of the disc and the connecting pipe, the lower end of the connecting branch pipe is provided with a second hose with a closed bottom end, and the lower end of the.
After the structure is adopted, the gas-liquid redistribution device disclosed by the invention is used for carrying out three-level water distribution, so that liquid is separated for many times, the diameter of water drops is reduced to the maximum extent, and the absorption area of absorption liquid is increased. According to the property of the substance to be absorbed, the property of the water distribution membrane is selected, the polarization property of the absorption liquid is increased, the glaring property of the absorbent is reduced, the flowing state of the absorption liquid in the absorption tower is improved, the absorption rate is increased, the power consumption of a pump is reduced, and the resistance of the absorption tower is reduced. The effective distribution of the invention can greatly save the investment of the power equipment of the spraying device and promote the absorption of the absorption liquid.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic view of the structure of an absorption packed column of the present invention.
Fig. 2 is a schematic structural view of the gas-liquid distribution device of the present invention.
Fig. 3 is a schematic view of a gas channel and a liquid channel.
Fig. 4 is a top view of the upper water distributor.
FIG. 5 is a schematic structural view of the material of the lower secondary water distributor.
FIG. 6 is a schematic view showing the structure of the material of the lower secondary water distributor.
Fig. 7 is a partially enlarged view of a portion a in fig. 1.
FIG. 8 is a schematic view of the structure of the filler monomer when it is not installed.
Fig. 9 is a sectional view taken along line B-B in fig. 7.
Fig. 10 is a schematic view of the structure of the wave device.
Fig. 11 is a partially enlarged view of a portion B in fig. 1.
Detailed Description
As shown in fig. 1 to 4, the absorption packed tower of the present invention includes a tower body 1, and a gas-liquid distribution device 2 and a packing device are disposed in the tower body 1. The gas-liquid distribution device 2 comprises an upper-layer water distributor 10 and a lower-layer water distributor 4, the upper-layer water distributor 10 and the lower-layer water distributor 4 are provided with through holes 9 serving as liquid channels 6, liquid collecting plates 5 are arranged on the upper-layer water distributor 10, the liquid channels 6 and the gas channels 7 are formed between the liquid collecting plates 5 at intervals, a top cap 8 is arranged above the gas channels 7, the angle of the middle part of the top cap 8 is 120 degrees, and the diameter of the through holes 9 of the lower-layer water distributor 4 is smaller than that of the through holes 9 of the upper-layer water distributor 10. The diameter of the upper water distributor is larger than that of the lower water distributor, and a connecting frame 11 is arranged between the upper water distributor 10 and the lower water distributor 4.
The diameter of the liquid water drops after passing through the upper layer of filler is increased, the absorption effect on the lower layer of filler is greatly reduced, and the liquid is sprayed from the upper part to the upper layer of water distributor 10, passes through the liquid channel 6 between the liquid collecting plates 5, leaks from the through hole 9 and enters the lower layer of water distributor 4. The diameter of the through hole of the lower layer water distributor 4 is smaller than that of the through hole of the upper layer water distributor 10, and water drops are cut by the lower layer water distributor 4 to be smaller. Meanwhile, the gas flows from bottom to top, and because the diameter of the upper water distributor 10 is larger than that of the lower water distributor 4, an edge gas channel 14 is formed at the circumferential edge between the upper water distributor 10 and the lower water distributor 4, and the gas passes through the edge gas channel 14 and passes through the gas channel 7. At this time, gas and liquid pass through the through holes 9, so that foam is prevented from being generated, and the top cap 8 is arranged to prevent the liquid from entering the gas channel 7.
The gas passages 7 may be provided in the form of a bar spaced from the liquid passages 6, or may be provided in the form of individual circles or boxes.
The gas channel is strip-shaped, the length is 100mm according to the diameter of the water distributor and the width is 100 mm.
An air equalizing device is arranged between the upper-layer water distributor 10 and the lower-layer water distributor 4, and the air equalizing device is a guide plate 13 which is vertical or basically vertical to the upper-layer water distributor 10 and the lower-layer water distributor 4.
The flow rate of the gas annular channel is 5.5-8.1m/s according to the calculation of the air quantity.
When the gas passage 7 and the liquid passage 6 are provided in a spaced-apart bar shape, the direction of the guide plate 13 is perpendicular to the bar. The guide plates can make the gas run along the space between the guide plates 13, and can prevent the gas from only passing through the circumferential edges of the upper water distributor 10 and the lower water distributor 4, thereby reducing the pressure of the gas, preventing the gas from passing through the liquid channel and preventing the generation of foam.
The lower layer water distributor is processed into fish scales or round holes (the diameter is 20 mm) according to the actual gas property.
A lower-layer secondary water distributor 12 is arranged below the lower-layer water distributor 4, and the lower-layer secondary water distributor 12 is made of a three-dimensional plastic wire mesh. After the liquid leaks from the lower water distributor 4, the liquid drops can be further cut and broken by the lower secondary water distributor 12, so that the liquid drops become smaller.
The material of the lower secondary water distributor 12 is a three-dimensional plastic wire mesh, and the three-dimensional plastic wire mesh is formed by cross arrangement of irregularly arranged plastic wires, as shown in fig. 5 and 6. The three-dimensional plastic wire mesh is randomly arranged in local parts, but is basically uniform everywhere on the whole and macroscopically. The plastic silk threads are randomly and alternately arranged with the interlayer, a large number of irregular bent channel structures on the three-dimensional plastic silk threads are formed, and liquid drops with large particle sizes automatically settle on the silk threads under the action of gravity, so that the liquid drops collide with the silk threads and are cut into smaller particle sizes. The three-dimensional plastic wire mesh can be used as a common geotechnical mesh pad for building geotechnical slope protection, and the geotechnical mesh pad is used as a water distributor, so that the effect is good, the price is low, and the replacement is convenient.
The threads forming the three-dimensional plastic wire mesh are arranged irregularly, so that the resistance of the lower-layer secondary water distributor 12 to liquid is small, and the thinning effect of the liquid particle size is good. If the regularly arranged silk screens are adopted, regular liquid paths can be formed in the regularly arranged silk screens, regular water flow can be formed after liquid passes through the lower-layer secondary water distributor 12, and the liquid can flow out along a plurality of channels in a centralized manner, so that the distribution effect is poor.
The tower body 1 is provided with a packing device, which comprises a bracket 3 and a connecting pipe 14 fixedly arranged on the bracket 3, as shown in fig. 1. The connection pipe 14 is provided with a plurality of packing elements 15 connected in series to the connection pipe 14.
As shown in fig. 8 and 9, the packing element 15 includes a disk 16 and a plurality of fiber bundles 17 disposed at an edge of the disk 16. The connecting pipe 14 is filled with a fluid, the fluid is a nonpolar liquid, such as vegetable oil, kerosene, carbon tetrachloride and the like, and can also be water, the upper end of the connecting pipe 14 is connected with a flexible pipe 18, the flexible pipe 18 extends out of the absorption packed tower and is connected with a wave device 19, and the wave device 19 can also be arranged inside the absorption packed tower.
An L-shaped connecting branch pipe 20 is arranged at the connecting part of the disk 16 and the connecting pipe 14, a second corrugated pipe 21 with a closed bottom end is arranged at the lower end of the connecting branch pipe 20, and the disk 16 is connected at the lower end of the second corrugated pipe 21. As shown in fig. 4, the disk 16 includes an inner ring 16a and an outer ring 16b, the inner ring 16a is connected to the lower end of the second bellows 21, and the inner ring 16a and the outer ring 16b are connected by a connecting rod 16 c.
As shown in FIG. 10, the wave device 19 includes a permanent magnet 22, a coil 23, a bellows 24 and a control circuit 25, the control circuit 25 generates a signal to control the direction and magnitude of the current passing through the coil 23, so that the coil 23 generates a changing magnetic field, and the coil 23 is sleeved on the front end of the permanent magnet 22 and moves with the permanent magnet 22 with a certain frequency, which may be 300-500 Hz. The coil 23 pushes the push plate 26 in front of the coil, the push plate 26 pushes the bellows 24, the liquid in the bellows 24 is squeezed to transmit the wave energy forward along the flexible pipe 18, the liquid in the connecting pipe 14 and the connecting branch pipe 20 is pushed to vibrate, the second bellows 21 is made to vibrate, and the disk 16 and the fiber bundle 17 are driven to vibrate at high frequency, so that the solution on the disk 16 and the fiber bundle 17 generates fine and high-density ripples or jumps out of small liquid beads. The bellows 24 and the second bellows 21 may be rubber tubes or bellows.
Packing device's packing monomer 15 passes through liquid transmission vibration, directly transmits the monomer with the vibration of liquid through the pipeline for the monomer is the high-frequency vibration of small-amplitude, makes to produce ripple and little liquid bead on the liquid film of absorption in-process, reduces the resistance of the vapour-liquid exchange process on packing surface, because the vibration of packing adds the biphase turbulent motion of gas-liquid, promotes absorptive going on. Since the vibration is transmitted through the liquid inside the connecting pipe, the vibration causes almost no loss in the connecting device of the packed tower, and most of the energy of the vibration is directly transmitted to the packing unit 15. Thus, the loss of the packed column is minimized. If the vibration is transmitted through the connecting rod of the packed tower, only simple vibration can be transmitted, and the amplitude and the frequency of the vibration are difficult to accurately adjust.
The support bar 28 is installed inside the three-dimensional plastic wire mesh, as shown in fig. 11, the support bar may be a plurality of straight bars inserted into the three-dimensional plastic wire mesh, and the support bar 28 may be provided in multiple layers and may be provided in different directions. The support rod is connected with a flexible pipe 18, and the flexible pipe 18 is connected with a wave device 19. The end of the flexible pipe 18 is provided with a second corrugated pipe 21, and the front end of the second corrugated pipe 21 is provided with a vibrating block 29 connected with a support rod 28.
The high-frequency vibration generated by the fluctuation device 19 is transmitted to the second corrugated pipe 21 and the vibrating block 29 through the liquid to drive the supporting rod 28 to vibrate, the supporting rod 28 drives the three-dimensional plastic silk screen to vibrate, small liquid beads are generated on the silk screen, the liquid on the silk screen falls quickly, and the formation of large liquid drops is reduced.
Claims (10)
1. A gas-liquid redistribution device, characterized in that: the water distributor comprises an upper-layer water distributor and a lower-layer water distributor, wherein through holes are formed in the upper-layer water distributor and the lower-layer water distributor, a liquid collecting plate is arranged on the upper-layer water distributor and forms an air channel, a top cap is arranged above the air channel, the diameter of the through hole of the lower-layer water distributor is smaller than that of the through hole of the upper-layer water distributor, and the diameter of the upper-layer water distributor is larger than that of the lower-layer water distributor.
2. The gas-liquid redistribution device of claim 1, wherein: and a lower-layer secondary water distributor is arranged below the lower-layer water distributor.
3. The gas-liquid redistribution device of claim 1, wherein: and a gas balancing device is arranged between the upper-layer water distributor and the lower-layer water distributor.
4. The gas-liquid redistribution device of claim 3, wherein: the gas balancing device is a guide plate which is vertical or basically vertical to the upper water distributor and the lower water distributor.
5. The gas-liquid redistribution device of claim 2, wherein: the lower secondary water distributor is made of a three-dimensional plastic wire mesh.
6. The gas-liquid redistribution device of claim 5, wherein: and a support rod is arranged in the three-dimensional plastic silk screen, a flexible pipe is connected to the support rod, and the flexible pipe is connected with a fluctuation device.
7. The gas-liquid redistribution device of claim 6, wherein: the wave device comprises a permanent magnet, a coil, a hose filled with liquid and a control circuit, wherein the coil is connected with the control circuit, the coil is sleeved at the front end of the permanent magnet, the front end of the coil is connected with a push plate, the front part of the push plate is connected with a corrugated pipe, and the corrugated pipe is communicated with a flexible pipe.
8. An absorption packed tower, characterized in that: comprising a tower body in which are arranged a gas-liquid redistribution device and a packing device according to claims 1-8.
9. The absorbent packed column according to claim 8, wherein: the packing device comprises a support and a connecting pipe fixedly installed on the support, the connecting pipe is provided with a plurality of packing units connected in series on the connecting pipe, each packing unit comprises a disc and a plurality of fiber bundles arranged at the edge of the disc, the connecting pipe is filled with fluid, the upper end of the connecting pipe is connected with a flexible pipe, the flexible pipe stretches out of the upper wall through a small hole to be connected with a fluctuation device, the fluctuation device is connected with the flexible pipe, an L-shaped connecting branch pipe is arranged at the connecting part of the disc and the connecting pipe, the lower end of the connecting branch pipe is provided with a second hose with a closed bottom end, and the lower end of the.
10. The absorbent packed column according to claim 9, wherein: the disc comprises an inner ring and an outer ring, the lower end of the second hose is connected with the inner ring, and the inner ring is connected with the outer ring through a connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010874155.3A CN112007481B (en) | 2020-08-26 | 2020-08-26 | Gas-liquid redistribution device and absorption packed tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010874155.3A CN112007481B (en) | 2020-08-26 | 2020-08-26 | Gas-liquid redistribution device and absorption packed tower |
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| CN112007481A true CN112007481A (en) | 2020-12-01 |
| CN112007481B CN112007481B (en) | 2022-08-26 |
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| JP2004041857A (en) * | 2002-07-09 | 2004-02-12 | Sumitomo Heavy Ind Ltd | Filler |
| CN201061730Y (en) * | 2007-07-13 | 2008-05-21 | 天津大学 | Liquid-liquid extraction tower for vibrating and regaling packing |
| CN103894138A (en) * | 2014-04-22 | 2014-07-02 | 天津市天大津康化工设备有限公司 | Collector and collector set for packed tower |
| CN204735228U (en) * | 2015-03-26 | 2015-11-04 | 天津市天地创智科技发展有限公司 | A regular mesh packs that is used for liquid or gas to disperse |
| JP2016523179A (en) * | 2013-06-10 | 2016-08-08 | イエフペ エネルジ ヌヴェルＩｆｐ Ｅｎｅｒｇｉｅｓ Ｎｏｕｖｅｌｌｅｓ | Distribution tray for gas-liquid contact tower with secondary distribution system |
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| CN106861318A (en) * | 2017-03-27 | 2017-06-20 | 房轶 | A kind of air cleaning unit and its purification method |
| CN107694486A (en) * | 2017-11-20 | 2018-02-16 | 宣城市楷昂化工有限公司 | A kind of liquid re-distributor with supporting role |
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2020
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Address after: 266000 d1-2-5f, science and technology innovation Huigu (Qingdao) science and Technology Park, No.2 Xiuyuan Road, high tech Zone, Qingdao, Shandong Province Applicant after: QINGDAO JINXU ENVIRONMENT ENGINEERING Co.,Ltd. Address before: 266000 No.8 jingangshan Road, Liuting street, Chengyang District, Qingdao City, Shandong Province Applicant before: QINGDAO JINXU ENVIRONMENT ENGINEERING Co.,Ltd. |
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