CN110871021A - Gas-liquid mass transfer device - Google Patents
Gas-liquid mass transfer device Download PDFInfo
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- CN110871021A CN110871021A CN201810998786.9A CN201810998786A CN110871021A CN 110871021 A CN110871021 A CN 110871021A CN 201810998786 A CN201810998786 A CN 201810998786A CN 110871021 A CN110871021 A CN 110871021A
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- 239000007788 liquid Substances 0.000 title claims abstract description 287
- 238000002347 injection Methods 0.000 claims abstract description 60
- 239000007924 injection Substances 0.000 claims abstract description 60
- 238000005507 spraying Methods 0.000 claims abstract description 36
- 238000005192 partition Methods 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 239000000758 substrate Substances 0.000 claims abstract description 5
- 239000007921 spray Substances 0.000 claims description 23
- 238000000926 separation method Methods 0.000 claims description 19
- 241000533950 Leucojum Species 0.000 claims description 5
- 239000007791 liquid phase Substances 0.000 abstract description 22
- 238000002156 mixing Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 13
- 239000012071 phase Substances 0.000 description 8
- 230000000630 rising effect Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
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- 230000007547 defect Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
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- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 241001640558 Cotoneaster horizontalis Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
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- 230000005484 gravity Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
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Abstract
The invention discloses a gas-liquid mass transfer device, which is arranged in a tower body and comprises: the tower plates are arranged in multiple layers and are connected with the tower body in a sealing way; the liquid holding tank takes the tower plates as a substrate and is uniformly distributed on the tower plates of each layer; the liquid holding tanks are a plurality of and are arranged on the tower plate in a protruding way; the number of the downcomers corresponds to that of the liquid holding tanks; the downcomer on the upper layer is inserted into the corresponding liquid holding groove; the lower layer of downcomer is communicated with the liquid holding groove, so that the liquid on the upper layer of tower plate can flow to the lower layer of tower plate; the injection cover is arranged in the liquid holding tank and is communicated with the air lifting holes of the lower tower plate; in the spraying hood, gas from the lower tray bears liquid from the liquid holding tank and in the lower part of the spraying hood, so that the liquid is broken into liquid drops, and the liquid drops are sprayed out from the spraying holes of the spraying hood and fall onto the upper tray. The invention can solve the problems of uneven gas-liquid mass transfer, low mass transfer efficiency and even serious dry plate at one side of the tower plate caused by bias flow of liquid on the tower plate. In addition, the problem of liquid phase back mixing can be effectively solved by adding the partition plate in the liquid holding tank.
Description
Technical Field
The invention relates to refining and separating equipment, in particular to a gas-liquid mass transfer device.
Background
The mass transfer process is a mass transfer process. Substances may be transferred within one phase or between phases due to concentration differences. The mass transfer process is an important process in the production of urban gas, chemical industry, metallurgy, medicine, light industry and the like. It includes many unit operations such as absorption, adsorption, distillation, rectification, extraction and drying.
The tower equipment is an important production equipment widely used in chemical industry, petroleum industry and other industries. The basic function of the column equipment is to provide the opportunity for the gas and liquid phases to be in full contact, enabling both mass and heat transfer processes to be carried out quickly and efficiently. It is also necessary to separate the gas phase and the liquid phase in time after the contact without entrainment. The tower equipment can be divided into two main types, namely a plate tower and a packed tower, according to the structural type of a gas-liquid contact part in the tower. The plate tower is internally provided with a plurality of layers of tower plates along the height of the tower, liquid flows from the top to the bottom of the tower one by one under the action of gravity, flowing liquid layers are formed on the plate surfaces of the plates, and gas is pushed by pressure difference and sequentially passes through the liquid layers on the tower plates from the bottom of the tower to the top of the tower. The gas phase and the liquid phase are contacted step by step in the tower, and the composition of the two phases changes in a step manner along the height of the tower.
In petrochemical separation operations, trays of plate columns have found widespread use as important mass transfer equipment elements. The existing tower plates mainly comprise floating valves and three-dimensional injection tower plates, but when the tower plate structures are applied to occasions easy to shake, the liquid on the tower plates can flow in a bias mode, particularly when the width size of the tower plates is large, even the phenomenon that the area on one side of the tower plates is dry is caused, the thickness of the liquid layer on the tower plates is uneven, the gas-liquid mass transfer efficiency is reduced, even the phenomenon that the gas-liquid mass transfer does not occur in the area of the part of the tower plates is caused, and the normal operation of the tower is seriously influenced.
In addition, the existing float valve column plate and the existing three-dimensional injection column plate have the problems of liquid phase back mixing, which affects the mass transfer efficiency of the column plate, and the back mixing is the most common problem in the separation process of the plate column, which reduces the mass transfer driving force of the column plate and reduces the mass transfer efficiency and the separation efficiency of the column plate.
Therefore, a gas-liquid mass transfer device is needed, so that the problems that the gas-liquid mass transfer is uneven, the mass transfer efficiency is too low and even a plate is dried on one side of the tower plate when the gas-liquid mass transfer is carried out on the tower plate due to bias flow of liquid on the tower plate on a shaking occasion, particularly on the offshore platform in the gas-liquid mass transfer process in the tower are solved. Meanwhile, a gas-liquid mass transfer device is also needed to solve the problem of liquid phase back mixing.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a gas-liquid mass transfer device, so as to overcome the defects of uneven gas-liquid mass transfer, low mass transfer efficiency and even serious dry plate on one side of a tower plate caused by bias flow of liquid on the tower plate. Another object of the present invention is to provide a gas-liquid mass transfer device, thereby effectively solving the problem of liquid phase back mixing.
In order to achieve the first object, the present invention provides a gas-liquid mass transfer device, which is arranged in a tower body, and comprises: the tower plates are arranged in multiple layers and are connected with the tower body in a sealing way; the liquid holding tank takes the tower plates as a substrate and is uniformly distributed on the tower plates of each layer; the liquid holding tanks are a plurality of and are arranged on the tower plate in a protruding way; the number of the downcomers corresponds to that of the liquid holding tanks; the downcomer on the upper layer is inserted into the corresponding liquid holding groove; the lower layer of downcomer is communicated with the liquid holding groove, so that the liquid on the upper layer of tower plate can flow to the lower layer of tower plate; the injection cover is arranged in the liquid holding tank and is communicated with the air lifting holes of the lower tower plate; in the spraying hood, gas from the lower tray bears liquid from the liquid holding tank and in the lower part of the spraying hood, so that the liquid is broken into liquid drops, and the liquid drops are sprayed out from the spraying holes of the spraying hood and fall onto the upper tray.
In order to achieve the above another object, the present invention provides a gas-liquid mass transfer device, which is provided in a tower body, and comprises: the tower plates are arranged in multiple layers and are connected with the tower body in a sealing way; the liquid holding tank takes the tower plates as a substrate and is uniformly distributed on the tower plates of each layer; the liquid holding tanks are a plurality of and are arranged on the tower plate in a protruding way; the number of the downcomers corresponds to that of the liquid holding tanks; the downcomer on the upper layer is inserted into the corresponding liquid holding groove; the lower layer of downcomer is communicated with the liquid holding groove, so that the liquid on the upper layer of tower plate can flow to the lower layer of tower plate; the injection cover is arranged in the liquid holding tank and is communicated with the air lifting holes of the lower tower plate; in the spraying cover, gas from a lower tower plate supports liquid from a liquid holding tank and positioned at the lower part of the spraying cover, so that the liquid is broken into liquid drops, and the liquid drops are sprayed out from a spraying hole of the spraying cover; and a partition plate disposed in parallel with the column plate, the partition plate being higher than the column plate and lower than the injection holes of the injection hood; the bottom of the downcomer on the upper layer extends into the separation plate, and the downcomer on the lower layer is communicated with the upper space of the separation plate, so that the liquid in the upper space of the separation plate can flow to the tower plate on the lower layer.
Further, in the two technical solutions, the plurality of liquid holding tanks on each layer of tower plate may be arranged in a snowflake shape. The liquid holding tank can be in the shape of a cylinder, a cuboid or a trapezoid; the diameter of the liquid holding tank can be 80mm to 200 mm; the height of the raised tray of the liquid holding tank can be 200mm to 300mm, and the height of the raised tray of the liquid holding tank is preferably 250mm to 300 mm.
Furthermore, in the two technical schemes, the injection cover is fixed on the tower plate and can completely cover the air lifting hole; two spray hoods may be provided in each holding tank. The shape of the spray hood can be a cylinder, a cuboid or a trapezoid; the height of the projecting tray of the spray hood can be designed to be 100mm to 150 mm. The height of the projecting tray of the spray hood is preferably from 120mm to 150 mm.
Furthermore, in the two technical schemes, the number of the air lifting holes is matched with the number of the injection covers; the shape of the lift pin holes can be circular, triangular or rectangular.
Furthermore, in the two technical schemes, the injection holes are formed in the side wall of the injection cover; the shape of the injection hole may be circular, triangular, or bar-shaped.
Further, in the two technical solutions, the distance between the bottom of the downcomer inserted in the liquid holding tank and the tower plate may be 30mm to 75 mm. The distance is preferably 50mm to 75 mm.
Further, in the two technical solutions, the lower part of the injection cover is provided with a liquid guiding ring hole, and liquid in the liquid holding tank can enter the injection cover through the liquid guiding ring hole. The height of the liquid guide ring hole can be 5mm to 10 mm. The height is preferably 8mm to 10 mm.
Compared with the prior art, the invention has the following beneficial effects:
1. the gas-liquid mass transfer equipment provided by the invention has the advantages that the liquid holding tanks are arranged, the flowing space of the liquid phase can be effectively reduced, the phenomenon that partial tower plates are dry due to bias flow of the liquid in a shaking place is avoided, and the gas-liquid mass transfer efficiency is ensured.
2. The invention realizes the parallel flow mass transfer of gas and liquid phases by arranging the plurality of injection covers, and the gas phase lifts, pulls the liquid into an annular membrane and breaks the liquid into liquid drops in the process of lifting the liquid phase, thereby reducing entrainment and improving the mass transfer efficiency.
3. The invention realizes the thorough separation of liquid phases before and after mass transfer by arranging the partition plate, avoids the back mixing of the liquid phases, increases the mass transfer driving force and improves the separation efficiency of the tower plate.
4. The invention can effectively guide the full contact of gas and liquid through the design of the liquid guide ring hole at the lower part of the injection cover, and further improve the gas-liquid mass transfer separation efficiency.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood and to make the technical means implementable in accordance with the contents of the description, and to make the above and other objects, technical features, and advantages of the present invention more comprehensible, one or more preferred embodiments are described below in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural view of a gas-liquid mass transfer device according to embodiment 1 of the present invention.
FIG. 2 is a schematic view of a horizontal tray structure of a gas-liquid mass transfer device according to example 1 of the present invention.
Fig. 3 is a schematic view of the structure of an injection hood of a gas-liquid mass transfer device according to embodiment 1 of the present invention.
Fig. 4 is a schematic structural view of a gas-liquid mass transfer device according to embodiment 2 of the present invention.
FIG. 5 is a schematic view of the horizontal tray structure of the gas-liquid mass transfer device according to example 2 of the present invention.
Fig. 6 is a schematic view of the structure of a separator of a gas-liquid mass transfer device according to embodiment 2 of the present invention.
Fig. 7 is a schematic view of the structure of an ejection hood of a gas-liquid mass transfer device according to embodiment 2 of the present invention.
Description of the main reference numerals:
1-tower body, 10-outer wall surface of the tower body, 11-tower plate, 111-circular hole for liquid descending, 112-air lifting hole, 12-liquid descending pipe, 13-liquid holding groove, 14-spraying cover, 141-spraying hole, 142-liquid guiding ring hole and 15-isolation plate.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Spatially relative terms, such as "below," "lower," "upper," "above," "upper," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the object in use or operation in addition to the orientation depicted in the figures. For example, if the items in the figures are turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the elements or features. Thus, the exemplary term "below" can encompass both an orientation of below and above. The article may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.
In this document, the terms "first", "second", etc. are used to distinguish two different elements or portions, and are not used to define a particular position or relative relationship. In other words, the terms "first," "second," and the like may also be interchanged with one another in some embodiments.
Example 1
Example 1 is shown in fig. 1 to 3. Referring to fig. 1, the gas-liquid mass transfer device of embodiment 1 of the present invention is provided in a column body 1, the column body 1 including a tray 11, a liquid-holding tank 13, a downcomer 12 and a spray cap 14, wherein the tray 11 is provided in a plurality of layers and is hermetically connected to the column body 1. The liquid holding tank 13 is uniformly arranged on each layer of tower plate 11 by taking the tower plate as a base. Referring to FIG. 2, a plurality of liquid holding tanks 13 are fixed on the tray 11, and the liquid holding tanks 13 are arranged on the tray 11 in a protruding manner. The design of the liquid holding tanks can reduce the flowing space of the liquid phase, and avoid the phenomenon that partial tower plates are dry due to bias flow of the liquid in a shaking place. In one or more embodiments, the liquid holding tank 13 may be arranged axisymmetrically with respect to the center line of the tray, and may be arranged in a snowflake shape as shown in fig. 2. The number of the downcomers 12 corresponds to the number of the liquid holding grooves 13, as shown in fig. 1, for example, the bottoms of the downcomers 12 (located at the right side of the liquid holding grooves in fig. 1) at the upper layer are inserted into the corresponding liquid holding grooves 13, the downcomers 12 (located at the left side of the liquid holding grooves 13) at the lower layer are communicated with the liquid holding grooves 13, and the downcomers 12 at the upper layer and the lower layer are arranged in a staggered manner, so that the liquid on the tower plate at the upper layer can flow to the tower plate at. The injection hood 14 is arranged in the liquid holding tank 13 and is communicated with the air lifting holes 112 of the lower tower plate 11. In the injection hood 14, the pressure gas from the lower tray 11 meets the liquid from the liquid holding tank 13 and located below the injection hood 14 during the rising process, and the pressure gas further lifts up the liquid, pulls the liquid into an annular film, breaks the film into liquid droplets, realizes gas-liquid separation and mass transfer, and finally the liquid droplets are ejected from the ejection holes 141 of the injection hood 14 and fall onto the upper tray. After the liquid drops are converged, the liquid drops flow into a liquid holding groove 13 of the next layer of tower plate 11 through a liquid descending circular hole 111 and a liquid descending pipe 12. The gas enters the upper tray 11 through the gas-lifting holes 112 of the upper tray 11.
As further shown in FIG. 1, in one or more embodiments, the liquid holding tank 13 may be shaped as a cylinder, a rectangular body, or a trapezoidal body, or may be shaped as another body. The height of the liquid holding tank 13 projecting from the tray 11 may be 200mm to 300 mm. The projection height of example 1 is designed to be 250mm to 300 mm. This protruding height allows for efficient storage of liquid on the tray 11. In one or more embodiments, two injection caps 14 may be provided in each of the holding liquid tanks 13. The injection hood 14 may be fixed to the tray and completely cover the lift-off holes 112. This ensures a clear lift channel. In one or more embodiments, the shape of the spray cap 14 may be designed as a cylinder, a rectangular body or a trapezoidal body, and other possible shapes may be adopted as long as the effective spraying effect is satisfied. In one or more embodiments, the height of the spray hood 14 protruding from the tray 11 can be from 100mm to 150 mm. The height of the projected tray of the injection hood 14 in example 1 is 120mm to 150 mm. The number and size of the injection holes 141 can be calculated by CFD fluid mechanics. The height of the spray hood 14 is such that the spray can be effected efficiently and that the sprayed droplets can fall on the tray within the liquid holding tank 13. The inner diameter of the liquid holding tank 13 is designed to be as small as possible, and the diameter can be set to be 80mm to 200mm, so that partial tower plate dry plates in the liquid holding tank can be effectively prevented from being caused by liquid phase bias flow.
As further shown in FIG. 2, in one or more exemplary embodiments, where the number of lift holes 112 matches the number of spray hoods 14, two spray hoods 14 and two lift holes 112 are used in example 1; the shape of the air lifting hole can be designed to be circular, triangular or rectangular, and the embodiment adopts the design of the circular air lifting hole. The opening size and opening ratio of the lift pin holes 112 can be calculated by CFD hydrodynamics. As further shown in fig. 1 and 2, the circular downcomer holes 111 are formed in the trays in the liquid-holding tank 13, the top of the downcomer 12 is inserted into the circular downcomer holes 111 in the upper layer, and the bottom is inserted into the liquid-holding tank 13 in the lower layer. The distance between the bottom of the downcomer 12 inserted in the liquid holding tank 13 and the tray 11 may be 30mm to 75 mm. The distance is 50mm to 75mm in this embodiment.
As further shown in fig. 3, the injection hole 141 is provided on the side wall of the injection hood 14 at a position near above the injection hood. The shape of the injection hole 141 may be designed as a circle, a triangle, a bar, or the like. The present embodiment employs a circular jet hole design. The lower portion of the spraying hood 14 is provided with a liquid guiding ring hole 142, and the liquid guiding ring hole 142 can be an annular gap between the tower plate 11 and the bottom of the spraying hood 14, so that the liquid in the liquid holding tank 13 can enter the spraying hood 14 through the liquid guiding ring hole 142. The height of the liquid guiding ring hole 142 may be designed to be 5mm to 10 mm. The height of the liquid guide ring hole of the embodiment is designed to be 8mm to 10 mm.
The working process of the gas-liquid mass transfer device in the embodiment 1 of the invention is as follows: the liquid of the upper tower plate 11 flows into the downcomer 12 from the downcomer circular hole 111 and then flows into the liquid holding groove 13, the liquid phase enters the inside of the injection cover 14 through the liquid guide ring hole 142 at the lower part of the injection cover 14, the gas rising from the lower tower plate 11 enters the injection cover 14 through the gas rising hole 112, the gas phase lifts the liquid with the liquid phase in the rising process, the liquid is pulled into an annular membrane and broken into liquid drops, gas-liquid separation and mass transfer are realized, finally the liquid drops are sprayed out from the side wall spraying hole 141 of the injection cover 14, fall onto the tower plate 11 outside the injection cover 14 and flow into the liquid holding groove 13 of the next tower plate 11 through the downcomer circular hole 111 and the downcomer 12. The gas enters the upper tray 11 through the gas-lifting holes 112 of the upper tray 11.
The gas-liquid mass transfer device provided by the embodiment can effectively overcome the defects of uneven gas-liquid mass transfer, too low mass transfer efficiency and even a dry plate at one side of the tower plate when the mass transfer efficiency is too low and even serious, which are caused by bias flow of liquid on the tower plate, by arranging the plurality of liquid holding tanks on the tower plate and designing the connection relationship, position relationship and size of the liquid holding tanks, the downcomer, the injection cover and the tower plate.
Example 2
Example 2 is shown in fig. 4 to 7. Referring to fig. 4, the gas-liquid mass transfer device of embodiment 2 of the present invention is disposed in a tower body 1, the tower body 1 includes tower plates 11, a liquid holding tank 13, a downcomer 12, a spray hood 14, and a partition plate 15, wherein the tower plates 11 are arranged in multiple layers and are hermetically connected to the tower body 1, so as to prevent liquid on the tower plates on the upper layer from flowing into the tower plates on the lower layer from a tower seam. The liquid holding tank 13 is uniformly arranged on each layer of tower plate 11 by taking the tower plate as a base. Referring to FIGS. 4 and 5, a plurality of liquid holding tanks 13 are fixed to the tray 11, and the liquid holding tanks 13 are provided in a number and are protruded from the tray 11. The design of the liquid holding tanks can reduce the flowing space of the liquid phase, and avoid the phenomenon that partial tower plates are dry due to bias flow of the liquid in a shaking place. In one or more exemplary embodiments, the liquid holding tank 13 may be disposed axisymmetrically with respect to the center line of the tray, and may be disposed in a snowflake shape as shown in fig. 5. The number of the down-flow pipes 12 corresponds to the number of the liquid holding grooves 13, as shown in fig. 4, for example, the bottom of the down-flow pipe 12 at the upper layer is inserted into the corresponding liquid holding groove 13 and extends into the partition plate 15, the down-flow pipe 12 at the lower layer is communicated with the upper space of the partition plate 15 in the liquid holding groove 13, and the down-flow pipes 12 at the upper and lower layers are arranged in a staggered manner, so that the liquid at the upper space of the partition plate 15 in the upper layer liquid holding groove 13 can flow to the lower space of the partition plate 15 in the lower layer liquid holding groove 13 (the lower space refers to the area between the tray and the partition plate in the liquid holding groove), thus avoiding the problem of liquid. As further shown in FIG. 4, the partition plate 15 is disposed in parallel with the tray 11, and the partition plate 15 is higher than the tray 11 and lower than the injection holes 141 of the injection hood 14. The injection hood 14 is arranged in the liquid holding tank 13 and is communicated with the air lifting holes 112 of the lower tower plate 11. In the injection hood 14, the pressure gas from the lower tray 11 meets the liquid from the space below the partition plate 15 in the liquid holding tank 13 and located below the injection hood 14 in the ascending process, and the pressure gas further lifts up the liquid, pulls the liquid into an annular film, breaks the liquid into liquid droplets, realizes gas-liquid separation and mass transfer, and finally the liquid droplets are ejected from the ejection holes 141 of the injection hood 14 and fall into the space above the partition plate 15 in the upper liquid holding tank. After the liquid drops are converged, the liquid drops flow into the liquid holding tank 13 of the next-layer tray 11 (namely, the lower-layer space of the separation plate 15) through the liquid descending circular hole 111 and the liquid descending pipe 12 on the separation plate 15. The gas enters the upper tray 11 through the gas-lifting holes 112 of the upper tray 11.
As further shown in fig. 4 and 5, in one or more exemplary embodiments, the shape of the liquid holding groove 13 may be designed as a cylinder, a rectangular body or a trapezoidal body, and may also be designed as other shapes. The height of the liquid holding tank 13 projecting from the tray 11 may be 200mm to 300 mm. The projection height of example 2 is designed to be 250mm to 300 mm. This protruding height allows for efficient storage of liquid on the tray 11. In one or more exemplary embodiments, two injection caps 14 may be provided in each of the liquid holding tank 13. The injection hood 14 may be fixed to the tray and completely cover the lift-off holes 112. This ensures a clear lift channel. In one or more exemplary embodiments, the shape of the spray cap 14 may be designed as a cylinder, a rectangular body, or a trapezoidal body, and other possible shape designs may be adopted as long as the effect of effective spraying is satisfied. In one or more exemplary embodiments, the height of the spray hood 14 protruding from the tray 11 may be 100mm to 150 mm. The height of the projected tray of the injection hood 14 in example 2 is 120mm to 150 mm. The number and size of the injection holes 141 can be calculated by CFD fluid mechanics. The height of the spray cap 14 allows effective spraying and allows the sprayed droplets to fall on the partition plate within the liquid holding tank 13. The inner diameter of the liquid holding tank 13 is designed to be as small as possible, and the diameter can be set to be 80mm to 200mm, so that partial tower plate dry plates in the liquid holding tank can be effectively prevented from being caused by liquid phase bias flow.
As further shown in fig. 5 and 6, in one or more exemplary embodiments, the number of louvers 112 matches the number of spray hoods 14, with example 2 employing two spray hoods 14 and two louvers 112; the shape of the air lifting hole can be designed to be circular, triangular or rectangular, and the embodiment adopts the design of the circular air lifting hole. The opening size and opening ratio of the lift pin holes 112 can be calculated by CFD hydrodynamics. As further shown in fig. 4 to 6, the circular downcomer holes 111 are provided on the trays and the partition plates 15 in the liquid holding tank 13 (one tray is provided in fig. 5 in this embodiment, and two partition plates are provided in fig. 6), the circular downcomer holes 111 of the upper-layer tray 11 are provided at the upper portion of the downcomer 12, the top portion of the downcomer is inserted into the circular downcomer holes 111 of the upper-layer partition plate 15, and the partition plates 15 in the lower-layer liquid holding tank 13 are provided at the bottom portion of the downcomer 12. The distance between the bottom of the downcomer 12 inserted in the liquid holding tank 13 and the tray 11 may be 30mm to 75 mm. The distance is 50mm to 75mm in this embodiment.
As further shown in fig. 7, the injection hole 141 is provided on the side wall of the injection hood 14 at a position near above the injection hood. The shape of the injection hole 141 may be designed as a circle, a triangle, a bar, or the like. The present embodiment adopts a design of a strip-shaped injection hole. The lower part of the spraying hood 14 is provided with a liquid guiding ring hole 142, and the liquid guiding ring hole 142 can be an annular gap between the tower plate 11 and the bottom of the spraying hood 14, so that the liquid in the lower space of the separation plate 15 in the liquid holding tank 13 can enter the spraying hood 14 through the liquid guiding ring hole 142. The height of the liquid guiding ring hole 142 may be designed to be 5mm to 10 mm. The height of the liquid guide ring hole of the embodiment is designed to be 8mm to 10 mm.
The working process of the gas-liquid mass transfer device in the embodiment 2 of the invention is as follows: the liquid above the partition plate 15 in the upper liquid holding tank 13 flows into the downcomer 12 from the circular downcomer hole 111 and further flows to the lower part of the partition plate in the liquid holding tank 13, the liquid phase enters the inside of the injection cover 14 through the liquid guide ring hole 142 at the lower part of the injection cover 14, the gas rising from the lower tower plate 11 enters the injection cover 14 through the gas rising hole 112, the gas phase carries the liquid phase to rise in the process of rising, the liquid is pulled into a ring-shaped film and broken into liquid drops, gas-liquid separation and mass transfer are realized, and finally the liquid drops are sprayed out from the side wall spray hole 141 of the injection cover 14, fall onto the partition plate 15 outside the injection cover 14 and flow to the lower part of the partition plate in the liquid holding tank 13 of the next tower plate 11 through the circular downcomer hole 111 and the downcomer. The gas enters the upper tray 11 through the gas-lifting holes 112 of the upper tray 11.
According to the gas-liquid mass transfer device provided by the embodiment, the plurality of liquid holding tanks are arranged on the tower plate, and the connection relation, the position relation and the size design of the liquid holding tanks, the downcomer, the injection cover and the tower plate can effectively overcome the defects of uneven gas-liquid mass transfer, too low mass transfer efficiency and even a dry plate at one side of the tower plate when the mass transfer efficiency is too low or even serious, which are caused by bias flow of liquid on the tower plate; meanwhile, the isolation of liquid phases before and after mass transfer is realized by arranging the isolation plates, the liquid phase back mixing is avoided, the gas-liquid mass transfer efficiency is improved, and the gas-liquid parallel flow mass transfer realizes the maximization of the gas-liquid mass transfer efficiency; in addition, the entrainment amount can be reduced by providing the spray cover.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. Any simple modifications, equivalent changes and modifications made to the above exemplary embodiments shall fall within the scope of the present invention.
Claims (28)
1. The utility model provides a gas-liquid mass transfer device, the device is located in the tower body, its characterized in that includes:
the tower plates are arranged in multiple layers and are connected with the tower body in a sealing way;
the liquid holding tank takes the tower plates as a substrate and is uniformly distributed on each layer of the tower plates; the number of the liquid holding tanks is multiple and the liquid holding tanks are arranged on the tower plate in a protruding way;
the number of the downcomers corresponds to that of the liquid holding tanks; the downcomer on the upper layer is inserted into the corresponding liquid holding groove; the downcomer of the lower layer is communicated with the liquid holding groove, so that the liquid on the upper layer of tower plate can flow to the lower layer of tower plate;
the spraying cover is arranged in the liquid holding tank and is communicated with the air lifting holes of the lower tower plate; in the spraying cover, the gas from the lower tower plate supports the liquid from the liquid holding tank and positioned at the lower part of the spraying cover, and further breaks the liquid into liquid drops, and the liquid drops are sprayed out from the spraying holes of the spraying cover and fall to the upper tower plate.
2. The gas-liquid mass transfer device of claim 1, wherein a plurality of said liquid holding tanks on each of said trays are arranged in a snowflake shape.
3. The gas-liquid mass transfer device of claim 1, wherein the liquid holding tank is shaped as a cylinder, a cuboid, or a trapezoid; the height of the liquid holding tank protruding out of the tower plate is 200mm to 300 mm; the diameter of the liquid holding tank is 80mm to 200 mm.
4. The gas-liquid mass transfer device according to claim 3, wherein the height of the liquid holding tank projecting from the tray is 250mm to 300 mm.
5. The gas-liquid mass transfer device of claim 1, wherein said jet hood is fixed to said tray and completely covers said lift holes; two spraying covers are arranged in each liquid holding tank.
6. The gas-liquid mass transfer device of claim 5, wherein said jet hood is cylindrical, rectangular or trapezoidal in shape; the height of the spray hood protruding from the tower plate is 100mm to 150 mm.
7. The gas-liquid mass transfer device of claim 6, wherein the height of the spray hood projecting above the tray is from 120mm to 150 mm.
8. The gas-liquid mass transfer device according to any one of claims 5 to 7, wherein the number of said lift holes matches the number of said spray hoods; the shape of the air lifting hole is circular, triangular or rectangular.
9. The gas-liquid mass transfer device of claim 1, wherein the jet orifices are provided in a sidewall of the jet hood; the shape of the injection hole is round, triangular or strip-shaped.
10. The gas-liquid mass transfer device of claim 1, wherein the distance between the bottom of the downcomer inserted in the liquid-holding tank and the tray is 30mm to 75 mm.
11. The gas-liquid mass transfer device of claim 10, wherein the distance between the bottom of the downcomer interposed in the liquid-holding tank and the tray is 50mm to 75 mm.
12. The gas-liquid mass transfer device of claim 1, wherein the lower portion of the hood is provided with a liquid-conducting annular ring through which liquid in the liquid-holding tank enters the hood.
13. The gas-liquid mass transfer device of claim 12, wherein the height of the liquid-conducting ring orifice is 5mm to 10 mm.
14. The gas-liquid mass transfer device of claim 13, wherein the height of the liquid-conducting ring orifice is 8mm to 10 mm.
15. The utility model provides a gas-liquid mass transfer device, the device is located in the tower body, its characterized in that includes:
the tower plates are arranged in multiple layers and are connected with the tower body in a sealing way;
the liquid holding tank takes the tower plates as a substrate and is uniformly distributed on each layer of the tower plates; the number of the liquid holding tanks is multiple and the liquid holding tanks are arranged on the tower plate in a protruding way;
the number of the downcomers corresponds to that of the liquid holding tanks; the downcomer on the upper layer is inserted into the corresponding liquid holding groove; the downcomer of the lower layer is communicated with the liquid holding groove, so that the liquid on the upper layer of tower plate can flow to the lower layer of tower plate;
the spraying cover is arranged in the liquid holding tank and is communicated with the air lifting holes of the lower tower plate; in the spraying cover, the gas from the lower tower plate supports the liquid from the liquid holding tank and positioned at the lower part of the spraying cover, and further breaks the liquid into liquid drops, and the liquid drops are sprayed out from the spraying holes of the spraying cover; and
a partition plate disposed in parallel with the tray, the partition plate being higher than the tray and lower than the injection holes of the injection hood; the bottom of the downcomer on the upper layer extends into the separation plate, and the downcomer on the lower layer is communicated with the upper space of the separation plate, so that liquid in the upper space of the separation plate can flow to the tower plate on the lower layer.
16. The gas-liquid mass transfer device of claim 15, wherein a plurality of said liquid holding tanks on each of said trays are arranged in a snowflake arrangement.
17. The gas-liquid mass transfer device of claim 15, wherein the holding tank is cylindrical, rectangular or trapezoidal in shape; the height of the liquid holding tank protruding out of the tower plate is 200mm to 300 mm; the diameter of the liquid holding tank is 80mm to 200 mm.
18. The gas-liquid mass transfer device of claim 15, wherein the height of the liquid holding tank from the tray is 250mm to 300 mm.
19. The gas-liquid mass transfer device of claim 15, wherein said jet hood is fixed to said tray and completely covers said lift holes; two spraying covers are arranged in each liquid holding tank.
20. The gas-liquid mass transfer device of claim 19, wherein said jet hood is cylindrical, rectangular or trapezoidal in shape; the height of the spray hood protruding from the tower plate is 100mm to 150 mm.
21. The gas-liquid mass transfer device of claim 20, wherein the height of the jet hood projecting above the tray is from 120mm to 150 mm.
22. The gas-liquid mass transfer device according to any one of claims 19 to 21, wherein the number of said lift pins matches the number of said spray hoods; the shape of the air lifting hole is circular, triangular or rectangular.
23. The gas-liquid mass transfer device of claim 15, wherein said jet orifices are provided in a sidewall of said jet hood; the shape of the injection hole is round, triangular or strip-shaped.
24. The gas-liquid mass transfer device of claim 15, wherein the distance between the bottom of the downcomer interposed in the liquid-holding tank and the tray is 30mm to 75 mm.
25. The gas-liquid mass transfer device of claim 24, wherein the distance between the bottom of the downcomer interposed in the liquid-holding tank and the tray is 50mm to 75 mm.
26. The gas-liquid mass transfer device of claim 15, wherein the lower portion of the hood is provided with a liquid-conducting annular hole through which liquid in the space below the partition plate in the liquid-holding tank enters the hood.
27. The gas-liquid mass transfer device of claim 26, wherein the height of the liquid-conducting ring orifice is 5mm to 10 mm.
28. The gas-liquid mass transfer device of claim 27, wherein the height of the liquid-conducting ring orifice is 8mm to 10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810998786.9A CN110871021B (en) | 2018-08-30 | 2018-08-30 | Gas-liquid mass transfer device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810998786.9A CN110871021B (en) | 2018-08-30 | 2018-08-30 | Gas-liquid mass transfer device |
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| CN110871021A true CN110871021A (en) | 2020-03-10 |
| CN110871021B CN110871021B (en) | 2022-03-08 |
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| CN201810998786.9A Active CN110871021B (en) | 2018-08-30 | 2018-08-30 | Gas-liquid mass transfer device |
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| CN1220179A (en) * | 1998-11-10 | 1999-06-23 | 天津大学 | Vapour-liquid parallel flow jet contact non-backmixing double-layer tower tray device |
| CN102961888A (en) * | 2012-12-04 | 2013-03-13 | 天津市创举科技有限公司 | Flow-separation back-mixing-free spraying tower disc |
| CN103143186A (en) * | 2013-02-04 | 2013-06-12 | 沈宏 | Rotary shear flow tray |
| CN203777902U (en) * | 2014-03-29 | 2014-08-20 | 曹纪运 | Oriented jet tower plate |
| CN104083891A (en) * | 2014-07-09 | 2014-10-08 | 河北工业大学 | Three-dimensional film spraying and perforating tray |
| CN204122127U (en) * | 2014-10-09 | 2015-01-28 | 天津奥展兴达化工技术有限公司 | A kind of double-deck gas and liquid flowing column plate |
| US20170313596A1 (en) * | 2015-04-06 | 2017-11-02 | King Fahd University Of Petroleum And Minerals | Single downcomer bubble column |
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2018
- 2018-08-30 CN CN201810998786.9A patent/CN110871021B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1220179A (en) * | 1998-11-10 | 1999-06-23 | 天津大学 | Vapour-liquid parallel flow jet contact non-backmixing double-layer tower tray device |
| CN102961888A (en) * | 2012-12-04 | 2013-03-13 | 天津市创举科技有限公司 | Flow-separation back-mixing-free spraying tower disc |
| CN103143186A (en) * | 2013-02-04 | 2013-06-12 | 沈宏 | Rotary shear flow tray |
| CN203777902U (en) * | 2014-03-29 | 2014-08-20 | 曹纪运 | Oriented jet tower plate |
| CN104083891A (en) * | 2014-07-09 | 2014-10-08 | 河北工业大学 | Three-dimensional film spraying and perforating tray |
| CN204122127U (en) * | 2014-10-09 | 2015-01-28 | 天津奥展兴达化工技术有限公司 | A kind of double-deck gas and liquid flowing column plate |
| US20170313596A1 (en) * | 2015-04-06 | 2017-11-02 | King Fahd University Of Petroleum And Minerals | Single downcomer bubble column |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110871021B (en) | 2022-03-08 |
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Effective date of registration: 20231009 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: Sinopec (Dalian) Petrochemical Research Institute Co.,Ltd. Address before: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee before: CHINA PETROLEUM & CHEMICAL Corp. Patentee before: DALIAN RESEARCH INSTITUTE OF PETROLEUM AND PETROCHEMICALS, SINOPEC Corp. |