CN114797149A - Plate type fractionating tower - Google Patents
Plate type fractionating tower Download PDFInfo
- Publication number
- CN114797149A CN114797149A CN202210501729.1A CN202210501729A CN114797149A CN 114797149 A CN114797149 A CN 114797149A CN 202210501729 A CN202210501729 A CN 202210501729A CN 114797149 A CN114797149 A CN 114797149A
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- Prior art keywords
- tower
- plate
- liquid
- tower body
- downcomer
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/16—Fractionating columns in which vapour bubbles through liquid
- B01D3/22—Fractionating columns in which vapour bubbles through liquid with horizontal sieve plates or grids; Construction of sieve plates or grids
-
- 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
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
- B01D3/324—Tray constructions
Abstract
The invention relates to the technical field of chemical industry, in particular to a plate-type fractionating tower; comprises a tower body, a base, an air inlet, an air outlet, a liquid inlet, a liquid outlet, a tower plate, an overflow weir and a downcomer; the lower part of the right side of the tower body is provided with an air inlet, the top of the tower body is provided with an air outlet, the upper part of the left side of the tower body is provided with a liquid inlet, and the bottom of the tower body is provided with a liquid outlet; a plurality of groups of tower plates are fixedly connected inside the tower body from top to bottom in sequence, the upper surfaces of the tower plates are provided with sieve holes, the edges of the sieve holes are provided with slide blocks, the tower plates are provided with grooves for placing the slide blocks, the slide blocks are in sliding connection with the grooves, the edges of the tower plates are fixedly connected with overflow weirs, the overflow weirs are matched with the inner wall of the tower body to form a downcomer, and the downcomer is arc-shaped; the sliding block and the groove are arranged on the edge of the sieve pore and matched with each other, and the size of the sieve pore is controlled by changing the flow of gas, so that the plate fractionating tower has a wider application range.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to a plate-type fractionating tower.
Background
Fractionation is a common method for separating liquid mixtures by using the difference in boiling points of the liquid mixtures, and is widely used in petroleum refining processes for separating various oil products. The plate fractionating tower is a common separation device for petrochemical enterprises;
the plate tower is a kind of grading contact mass transfer equipment for gas-liquid or liquid-liquid system, and is formed from cylindrical tower body and several tower plates which are placed in the tower according to a certain spacing, and can be extensively used for rectification and absorption, and some types also can be used for extraction, and can be used for gas-liquid phase reaction process as reactor.
In the prior art, the sizes of the sieve pores on the tower plate of the plate fractionating tower are mostly fixed and can not be adjusted, and the sizes of the sieve pores needed by different liquids are different, for example, some liquids with higher viscosity are easy to cause sieve pore blockage due to undersize sieve pores; if the size of the sieve pores is not changed, the requirement on the properties of the required liquid is too single, and the wide applicability is not realized.
In view of the above, in order to overcome the above technical problems, the present invention provides a plate type fractionating tower, which solves the above technical problems.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the plate fractionating tower provided by the invention can control the size of the sieve pores, so that the plate fractionating tower has a wider application range.
The invention provides a plate-type fractionating tower, which comprises a tower body, a base, an air inlet, an air outlet, a liquid inlet, a liquid outlet, tower plates, an overflow weir and a downcomer; the bottom of the tower body is fixedly connected with a base, the lower part of the right side of the tower body is provided with an air inlet, the top of the tower body is provided with an air outlet, the upper part of the left side of the tower body is provided with a liquid inlet, and the bottom of the tower body is provided with a liquid outlet; a plurality of groups of tower plates are fixedly connected inside the tower body from top to bottom in sequence, and the plurality of groups of tower plates are arranged at equal intervals from top to bottom; the tower plate is characterized in that a through hole is formed in the upper surface of the tower plate, a groove is formed in the edge of the through hole, a sliding block is connected to the groove in a sliding mode, one end of a spring is fixedly connected to the bottom end of the sliding block, the other end of the spring is fixedly connected with the side wall of the groove, the sliding block and the sliding block are matched to form a sieve mesh, an overflow weir is fixedly connected to the edge of the tower plate, the overflow weir and the inner wall of the tower body are matched to form a downcomer, and the downcomer is arched.
Preferably, the through holes are trapezoidal holes, and the pore diameter of the upper surface of the tower plate is smaller than that of the lower surface of the tower plate.
Preferably, the plate surface of the tower plate is provided with a herringbone ripple.
Preferably, the plate surface of the tower plate is fixedly connected with a plurality of spiral fans, and the spiral fans are uniformly arranged.
Preferably, the fan surface of the spiral fan is provided with sharp spines.
Preferably, gaps are uniformly formed at the top end of the overflow weir.
Preferably, the bottom of the downcomer is provided with a slope.
The invention has the following beneficial effects:
1. according to the plate-type fractionating tower, the sliding blocks and the grooves are arranged on the edges of the sieve pores to be matched, and the size of the sieve pores is controlled by changing the flow of gas, so that the plate-type fractionating tower has a wider application range;
2. the plate-type fractionating tower provided by the invention has the technical characteristics of the herringbone ripples, the spiral fan, the sharp spines, the gaps, the slope surfaces and the like, so that the occurrence of adverse phenomena such as gas phase back mixing, overflow flooding and the like is reduced, and the mass transfer effect of the plate-type fractionating tower is better.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of the general structure of the present invention;
FIG. 2 is a cross-sectional view of a tray of the present invention;
FIG. 3 is a top plan view of a tray of the present invention;
FIG. 4 is a schematic view of a weir arrangement of the present invention;
fig. 5 is a top view of the fan of the present invention.
In the figure: the tower body 1, a base 2, an air inlet 3, an air outlet 4, a liquid inlet 5, a liquid outlet 6, a tower plate 7, a sieve hole 71, a slide block 72, a groove 73, a herringbone ripple 74, a spiral fan 75, a spine 751, an overflow weir 8, a gap 81, a downcomer 9 and a slope 91.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
The invention provides a plate-type fractionating tower which comprises a tower body 1, a base 2, an air inlet 3, an air outlet 4, a liquid inlet 5, a liquid outlet 6, a tower plate 7, an overflow weir 8 and a downcomer 9, wherein the base 2 is fixedly connected to the bottom of the tower body 1, the air inlet 3 is arranged at the lower part of the right side of the tower body 1, the air outlet 4 is arranged at the top of the tower body 1, the liquid inlet 5 is arranged at the upper part of the left side of the tower body 1, and the liquid outlet 6 is arranged at the bottom of the tower body 1; a plurality of groups of tower plates 7 are fixedly connected to the interior of the tower body 1 from top to bottom in sequence, and the plurality of groups of tower plates 7 are arranged at equal intervals from top to bottom; the tower plate comprises a tower plate body 1, a tower plate 7 and a tower plate 7, wherein the upper surface of the tower plate body is provided with a through hole, the edge of the through hole is provided with a groove 73, the groove 73 is connected with a sliding block 72 in a sliding mode, the bottom end of the sliding block 72 is fixedly connected with one end of a spring, the other end of the spring is fixedly connected with the side wall of the groove 73, the sliding block 72 is matched with the sliding block 72 to form a sieve hole 71, the edge of the tower plate 7 is fixedly connected with an overflow weir 8, the overflow weir 8 is matched with the inner wall of the tower body 1 to form a downcomer 9, and the downcomer 9 is arched.
When the plate fractionating tower works, liquid enters the tower body 1 from the liquid inlet 5, passes through the top tower plate 7 and the overflow weir 8, and enters the next group of tower plates 7 through the downcomer 9, and similarly, the liquid flows through each group of tower plates 7 in the tower body 1; meanwhile, gas enters the tower body 1 from the gas inlet 3, moves upwards, passes through the sieve holes 71 on the tower plate 7 to transfer mass with liquid on the tower plate 7, when some liquid needs large sieve holes 71 to transfer mass, such as liquid with high viscosity, the sieve holes 71 are too small to easily cause blockage, at this time, the flow of the gas in the gas inlet 3 can be increased, the gas impacts the sliding blocks 72 at the edges of the sieve holes 71 when passing through the sieve holes 71, the sliding blocks 72 are forced to be pushed into the grooves 73, so that the sieve holes 71 are increased, and for different liquids, the size of the sieve holes 71 is controlled by changing the flow of the gas in the gas inlet 3, so that the plate type fractionating tower has a wider application range; after liquid and gas are subjected to mass transfer on the tower plate 7, the liquid flows out from a liquid outlet 6 at the bottom of the tower body 1, and the gas is discharged out of the tower body 1 from a gas outlet 4 at the top of the tower body 1.
In one embodiment of the present invention, the sieve holes 71 are trapezoidal holes, and the pore diameter of the upper surface of the tray 7 is smaller than the pore diameter of the lower surface of the tray 7.
When the gas passes through the sieve holes 71, the sieve holes 71 are arranged into trapezoidal holes, so that the sliding block 72 is better stressed, the sliding block 72 is convenient to extend and retract in the groove 73, the upper aperture of the sieve holes 71 is smaller than the lower aperture of the sieve holes 71, the gas velocity of the gas is increased, the gas passes through the sieve holes 71 and then is in spraying contact with the liquid, when the gas velocity is increased, the liquid on the tower plate 7 is sprayed upwards to form liquid drops with different sizes, and the liquid drops fall back to the tower plate 7 under the action of gravity; the liquid drops return to the tower plate 7 and are dispersed again, and the liquid drops are repeatedly formed and gathered, so that the mass transfer area is increased, and the surface is continuously updated; this is a desirable contact state in industrial production.
As a specific embodiment of the invention, the plate surface of the tower plate 7 is provided with the herringbone ripples 74.
When liquid flows on the surface of the tower plate 7, the flow time of the liquid on the surface of the tower plate 7 can be prolonged by the aid of the human-shaped corrugations 74 arranged on the surface of the tower plate 7, so that mass transfer is more sufficient by prolonging the mass transfer time with gas, fluid is in a turbulent flow state, liquid level tension encountered by the gas when the gas passes through is reduced, plate pressure drop is reduced, the fluid is in the turbulent flow state, the liquid can be continuously updated, mass transfer effect is improved, the rigidity of the tower plate 7 can be increased by the aid of the human-shaped corrugations 74 arranged on the surface of the tower plate 7, and pressure bearing capacity of the tower plate 7 is improved.
As a specific embodiment of the present invention, a plurality of spiral fans 75 are fixedly connected to the plate surface of the tray 7, and the spiral fans 75 are uniformly arranged.
When liquid flows on the surface of the tower plate 7, the liquid pushes the fan blades of the spiral fan 75 to rotate the spiral fan 75, the rotation process of the spiral fan 75 plays a role in stirring, and the liquid is continuously updated, so that the mass transfer effect is improved.
In an embodiment of the present invention, the fan surface of the spiral fan 75 is provided with spikes 751.
In the rotation process of the spiral fan 75, the sharp spine 751 arranged on the fan surface of the spiral fan 75 can pierce the bubbles on the surface of the liquid surface, so that excessive bubbles are prevented from flowing into the lower tower plate 7, gas phase back mixing is caused, and the adverse effect on the transmission is avoided; and when the bubbles are broken, the surface of the liquid film can be continuously updated, and the mass transfer effect is improved.
In an embodiment of the present invention, a gap 81 is uniformly formed at the top end of the overflow weir 8.
When liquid flows through the overflow weir 8, the gaps 81 are uniformly formed at the top end of the overflow weir 8, so that excessive foam in the liquid is reduced from flowing into the downcomer 9, the excessive foam in the downcomer 9 is prevented, the average density of the liquid is reduced, and the liquid in the downcomer is seriously influenced to flow downwards to enter the lower-layer tower plate 7.
In one embodiment of the present invention, the bottom of the downcomer 9 is provided with a slope 91.
When liquid enters the lower-layer tower plate 7 through the downcomer 9, the slope 91 arranged at the bottom of the downcomer 9 can enable the liquid to smoothly flow into the lower-layer tower plate 7, so that the resistance of the liquid in the downcomer 9 is reduced, and the phenomenon that the overflow flooding caused by the accumulation of the liquid in the downcomer 9 affects the mass transfer effect is prevented; and the slope 91 arranged at the bottom of the downcomer 9 enables the liquid to smoothly flow into the lower-layer tower plate 7, so that the impact of the liquid on the lower-layer tower plate 7 is reduced.
The working principle is as follows:
when the plate fractionating tower works, liquid enters the tower body 1 from the liquid inlet 5, passes through the top tower plate 7 and the overflow weir 8, and enters the next group of tower plates 7 through the downcomer 9, and similarly, the liquid flows through each group of tower plates 7 in the tower body 1; meanwhile, gas enters the tower body 1 from the gas inlet 3, moves upwards, passes through the sieve holes 71 on the tower plate 7 to transfer mass with liquid on the tower plate 7, when some liquid needs large sieve holes 71 to transfer mass, such as liquid with high viscosity, the sieve holes 71 are too small to easily cause blockage, at this time, the flow of the gas in the gas inlet 3 can be increased, the gas impacts the sliding blocks 72 at the edges of the sieve holes 71 when passing through the sieve holes 71, the sliding blocks 72 are forced to be pushed into the grooves 73, so that the sieve holes 71 are increased, and for different liquids, the size of the sieve holes 71 is controlled by changing the flow of the gas in the gas inlet 3, so that the plate type fractionating tower has a wider application range; after liquid and gas are subjected to mass transfer on the tower plate 7, the liquid flows out from a liquid outlet 6 at the bottom of the tower body 1, and the gas is discharged out of the tower body 1 from a gas outlet 4 at the top of the tower body 1.
When the gas passes through the sieve holes 71, the sieve holes 71 are arranged into trapezoidal holes, so that the sliding block 72 is better stressed, the sliding block 72 is convenient to extend and retract in the groove 73, the upper aperture of the sieve holes 71 is smaller than the lower aperture of the sieve holes 71, the gas velocity of the gas is increased, the gas passes through the sieve holes 71 and then is in spraying contact with the liquid, when the gas velocity is increased, the liquid on the tower plate 7 is sprayed upwards to form liquid drops with different sizes, and the liquid drops fall back to the tower plate 7 under the action of gravity; the liquid drops return to the tower plate 7 and are dispersed again, and the liquid drops are repeatedly formed and gathered, so that the mass transfer area is increased, and the surface is continuously updated; this is a desirable contact state in industrial production;
when liquid flows on the surface of the tower plate 7, the flow time of the liquid on the surface of the tower plate 7 can be prolonged by the aid of the human-shaped corrugations 74 arranged on the surface of the tower plate 7, so that mass transfer is more sufficient by prolonging the mass transfer time with gas, fluid is in a turbulent flow state, liquid level tension encountered by the gas when the gas passes through is reduced, plate pressure drop is reduced, the fluid is in the turbulent flow state, the liquid can be continuously updated, mass transfer effect is improved, the rigidity of the tower plate 7 can be increased by the aid of the human-shaped corrugations 74 arranged on the surface of the tower plate 7, and pressure bearing capacity of the tower plate 7 is improved.
When liquid flows on the surface of the tower plate 7, the liquid pushes the fan blades of the spiral fan 75 to rotate the spiral fan 75, the rotation process of the spiral fan 75 plays a role in stirring, and the liquid is continuously updated, so that the mass transfer effect is improved.
In the rotation process of the spiral fan 75, the sharp spine 751 arranged on the fan surface of the spiral fan 75 can pierce the bubbles on the surface of the liquid surface, so that excessive bubbles are prevented from flowing into the lower tower plate 7, gas phase back mixing is caused, and the adverse effect on the transmission is avoided; and when the bubbles are broken, the surface of the liquid film can be continuously updated, and the mass transfer effect is improved.
When liquid flows through the overflow weir 8, the gaps 81 are uniformly formed at the top end of the overflow weir 8, so that excessive foam in the liquid is reduced from flowing into the downcomer 9, the excessive foam in the downcomer 9 is prevented, the average density of the liquid is reduced, and the liquid in the downcomer is seriously influenced to flow downwards to enter the lower-layer tower plate 7.
When liquid enters the lower-layer tower plate 7 through the downcomer 9, the slope 91 arranged at the bottom of the downcomer 9 can enable the liquid to smoothly flow into the lower-layer tower plate 7, so that the resistance of the liquid in the downcomer 9 is reduced, and the phenomenon that the overflow flooding caused by the accumulation of the liquid in the downcomer 9 affects the mass transfer effect is prevented; and the slope 91 arranged at the bottom of the downcomer 9 enables the liquid to smoothly flow into the lower-layer tower plate 7, so that the impact of the liquid on the lower-layer tower plate 7 is reduced.
The foregoing shows and describes the general principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a plate fractionating tower, includes tower body (1), base (2), air inlet (3), gas outlet (4), inlet (5), leakage fluid dram (6), column plate (7), overflow weir (8) and downcomer (9), its characterized in that: the bottom of the tower body (1) is fixedly connected with a base (2), the lower part of the right side of the tower body (1) is provided with an air inlet (3), the top of the tower body (1) is provided with an air outlet (4), the upper part of the left side of the tower body (1) is provided with a liquid inlet (5), and the bottom of the tower body (1) is provided with a liquid outlet (6); a plurality of groups of tower plates (7) are fixedly connected in sequence from top to bottom inside the tower body (1), and the plurality of groups of tower plates (7) are arranged at equal intervals from top to bottom; the tower plate is characterized in that a through hole is formed in the upper surface of the tower plate, a groove (73) is formed in the edge of the through hole, a sliding block (72) is connected to the groove (73) in a sliding mode, one end of a spring is fixedly connected to the bottom end of the sliding block (72), the other end of the spring is fixedly connected with the side wall of the groove (73), the sliding block (72) is matched with the sliding block (72) to form a sieve mesh (71), an overflow weir (8) is fixedly connected to the edge of the tower plate (7), a downcomer (9) is formed by matching the overflow weir (8) with the inner wall of the tower body (1), and the downcomer (9) is arched.
2. A plate fractionator according to claim 1, wherein: the sieve holes (71) are trapezoidal holes, and the pore diameter of the upper surface of the tower plate (7) is smaller than that of the lower surface of the tower plate (7).
3. A plate fractionator according to claim 1, wherein: the plate surface of the tower plate (7) is provided with a herringbone ripple (74).
4. A plate fractionator according to claim 1, wherein: the plate surface of the tower plate (7) is fixedly connected with a plurality of spiral fans (75), and the spiral fans (75) are uniformly arranged.
5. A plate fractionator according to claim 4, wherein: the fan surface of the spiral fan (75) is provided with sharp spines (751).
6. A plate fractionator according to claim 1, wherein: gaps (81) are uniformly formed at the top end of the overflow weir (8).
7. A plate fractionator according to claim 1, wherein: the bottom of the downcomer (9) is provided with a slope (91).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210501729.1A CN114797149A (en) | 2022-05-09 | 2022-05-09 | Plate type fractionating tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210501729.1A CN114797149A (en) | 2022-05-09 | 2022-05-09 | Plate type fractionating tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114797149A true CN114797149A (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210501729.1A Pending CN114797149A (en) | 2022-05-09 | 2022-05-09 | Plate type fractionating tower |
Country Status (1)
| Country | Link |
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| CN (1) | CN114797149A (en) |
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| GB1253731A (en) * | 1968-01-17 | 1971-11-17 | Bosch Gmbh Robert | Improvements in regulating valves for fluids |
| JP3175726U (en) * | 2012-03-08 | 2012-05-24 | 東京エレクトロン株式会社 | Liquid processing equipment |
| CN207856980U (en) * | 2017-12-14 | 2018-09-14 | 操玉涛 | A kind of solid waste screening plant |
| CN109381886A (en) * | 2018-12-26 | 2019-02-26 | 湖北远春石化设备制造有限公司 | A kind of plate column convenient for gas-liquid mass transfer |
| CN111744225A (en) * | 2020-07-24 | 2020-10-09 | 邓健 | Plate-type packing rectifying tower |
| CN212282920U (en) * | 2020-05-29 | 2021-01-05 | 大连川连酒厂 | Rectifying device is used in ethanol alcohol production |
| CN112323531A (en) * | 2020-11-09 | 2021-02-05 | 毕重和 | Pressure screen capable of automatically adjusting clearance between rotor and screen cylinder according to pressure |
| CN212524947U (en) * | 2020-05-06 | 2021-02-12 | 安徽采林间食品有限公司 | Food processing is with shale shaker of adjustable sieve mesh size |
| CN213791883U (en) * | 2020-11-23 | 2021-07-27 | 四川永诺生物科技有限公司 | Reducing mechanism is used in animal remedy processing |
| CN215585518U (en) * | 2021-10-08 | 2022-01-21 | 浙江德力装备有限公司 | Turbine extraction tower device with variable-aperture tower plate |
| CN114146440A (en) * | 2021-11-18 | 2022-03-08 | 付雪玲 | Low-energy-consumption energy-saving chemical light-component removing tower |
-
2022
- 2022-05-09 CN CN202210501729.1A patent/CN114797149A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1253731A (en) * | 1968-01-17 | 1971-11-17 | Bosch Gmbh Robert | Improvements in regulating valves for fluids |
| JP3175726U (en) * | 2012-03-08 | 2012-05-24 | 東京エレクトロン株式会社 | Liquid processing equipment |
| CN207856980U (en) * | 2017-12-14 | 2018-09-14 | 操玉涛 | A kind of solid waste screening plant |
| CN109381886A (en) * | 2018-12-26 | 2019-02-26 | 湖北远春石化设备制造有限公司 | A kind of plate column convenient for gas-liquid mass transfer |
| CN212524947U (en) * | 2020-05-06 | 2021-02-12 | 安徽采林间食品有限公司 | Food processing is with shale shaker of adjustable sieve mesh size |
| CN212282920U (en) * | 2020-05-29 | 2021-01-05 | 大连川连酒厂 | Rectifying device is used in ethanol alcohol production |
| CN111744225A (en) * | 2020-07-24 | 2020-10-09 | 邓健 | Plate-type packing rectifying tower |
| CN112323531A (en) * | 2020-11-09 | 2021-02-05 | 毕重和 | Pressure screen capable of automatically adjusting clearance between rotor and screen cylinder according to pressure |
| CN213791883U (en) * | 2020-11-23 | 2021-07-27 | 四川永诺生物科技有限公司 | Reducing mechanism is used in animal remedy processing |
| CN215585518U (en) * | 2021-10-08 | 2022-01-21 | 浙江德力装备有限公司 | Turbine extraction tower device with variable-aperture tower plate |
| CN114146440A (en) * | 2021-11-18 | 2022-03-08 | 付雪玲 | Low-energy-consumption energy-saving chemical light-component removing tower |
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