CN114112467A - Experimental device for be used for measuring air lifter performance - Google Patents
Experimental device for be used for measuring air lifter performance Download PDFInfo
- Publication number
- CN114112467A CN114112467A CN202111410047.1A CN202111410047A CN114112467A CN 114112467 A CN114112467 A CN 114112467A CN 202111410047 A CN202111410047 A CN 202111410047A CN 114112467 A CN114112467 A CN 114112467A
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- liquid
- air
- gas
- storage tank
- pipe
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- 239000007788 liquid Substances 0.000 claims abstract description 76
- 238000010992 reflux Methods 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims description 20
- 239000007924 injection Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 4
- 230000002285 radioactive effect Effects 0.000 abstract description 4
- 238000007654 immersion Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 231100000331 toxic Toxicity 0.000 abstract description 3
- 230000002588 toxic effect Effects 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract 1
- 230000005514 two-phase flow Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
Abstract
The invention relates to the technical field of toxic or radioactive fluid conveying, and belongs to an experimental device for measuring the performance of an air lifter. The invention comprises the following steps: the air compressor machine, the air compressor machine is connected the gas holder, the cool machine that does of gas holder other end exit linkage, the cool machine that does is provided with the relief pressure valve, two mass flow controller are connected to the relief pressure valve, be used for control and measurement inlet flow, mass flow controller exit linkage gas distributor, gas distributor upper end is connected with the stalk lower extreme, the stalk upper end with stretch into the overflow launder, through flange and bolted connection, the gas distributor lower extreme is connected with the pipette, the pipette lower extreme inserts in the L type aqua storage tank, and through flange and bolted connection, the return line is connected to the overflow launder bottom, auxiliary reflux pump and three liquid flowmeter have set gradually on the return line. The invention can observe the flowing condition in the riser tube, and the arrangement of the return pipeline can keep the immersion degree of the riser tube unchanged in the experimental process, thereby reducing the operation difficulty of the experiment.
Description
Technical Field
The invention relates to the technical field of toxic or radioactive fluid conveying, and belongs to an experimental device for measuring the performance of an air lifter.
Background
An airlift is a fluid transfer device that lifts liquid by air, and has been widely used for transferring toxic or radioactive fluids, extracting sediments in sewage ponds or river bottoms, and the like.
The main components of the air lifter comprise a liquid lifting pipe and a gas injection pipe, wherein the lower part of the liquid lifting pipe is immersed in liquid, the gas injection pipe conveys compressed air to the lower part of the liquid lifting pipe, the compressed air entering the liquid lifting pipe is mixed with the liquid by bubbles with different sizes to form a two-phase flow with relatively low density, the gas-liquid mixture is lifted by utilizing the principle of a communicating vessel and flows out from the top of the liquid lifting pipe, and the lifting and conveying of the liquid are realized. To achieve a good rise efficiency of the liquid in the tube, the air lifter needs to be immersed to a certain degree, i.e. the proportion of the liquid in which the riser tube is immersed. After this condition is met, the airlift can vary the flow of the delivered liquid by adjusting the incoming air flow.
The air lifter has the characteristics of simple equipment pipeline, no transmission part, no maintenance part and good reliability, so the air lifter is widely applied to conveying corrosive and radioactive liquid. Airlifts also have significant disadvantages: the flow is unstable and the flow rate is difficult to predict. Airlifts generally have a high operating efficiency in the form of a bullet flow characterized by alternating liquid slugs and large bubbles filling the entire pipe diameter, which results in intermittent fluctuations in flow at all times. Meanwhile, the pipe diameter and the submergence of the riser play a decisive role in the maximum efficiency point and the maximum flow point of the air lifter, and the improper size and submergence can cause the long-term low-efficiency work of the air lifter. The energy consumption can be better saved by selecting an air lifter with proper size through experiments.
The traditional air lifter immerses the liquid lifting pipe in the water storage tank, so that the flowing condition in the liquid lifting pipe cannot be observed when the liquid is lifted; the operation is more complicated when the riser tubes with different sizes are replaced; conventional airlifts require constant replenishment of liquid to maintain a fixed degree of submersion. Conventional air lifters can only inject air at the bottom or fixed location of the riser, and the length of the riser that can be tested is fixed.
Disclosure of Invention
The invention aims to provide an experimental device for measuring the performance of an air lifter, which can test the performance of the air lifter with different sizes under different submergence degrees.
The purpose of the invention is realized by the following technical scheme:
an experimental apparatus for measuring air lifter performance includes: the system comprises an air compressor, an air storage tank, a freeze dryer, a mass flow controller, a liquid lifting pipe, an overflow groove, an auxiliary reflux pump, a liquid flowmeter, an L-shaped water storage tank, a gas distributor, a pressure reducing valve and a liquid suction pipe; the air compressor machine is connected with the air storage tank, the other end of the air storage tank is connected with the cold dryer through an outlet, the cold dryer is provided with a pressure reducing valve, the pressure reducing valve is connected with two mass flow controllers and used for controlling and measuring the air inflow, the outlet of the mass flow controller is connected with a gas distributor, the upper end of the gas distributor is connected with the lower end of a riser through a flange and a bolt, the upper end of the riser stretches into the overflow groove and is connected with a liquid suction pipe through a flange and a bolt, the lower end of the liquid suction pipe is inserted into the L-shaped water storage groove and is connected with the bolt through a flange, the bottom of the overflow groove is connected with a backflow pipeline, and an auxiliary backflow pump and three liquid flow meters are sequentially arranged on the backflow pipeline.
Further, the gas distributor comprises a gas injection hole, a gas injection pipeline and a gas distribution chamber; the gas injection pipeline is connected with the gas distribution chamber, the liquid lifting pipe vertically penetrates through the gas distribution chamber, and the liquid lifting pipe is provided with a gas injection hole; compressed air enters the gas distribution chamber from the gas injection pipeline and is injected into the liquid rising pipe through the gas injection hole to be mixed with liquid.
Further, the two mass flow controllers are 0-50L/min and 30-300L/min.
Furthermore, be provided with supplementary backwash pump on the back flow line, when liquid flow is less than 650L/h, accessible gravity flows backward to L type aqua storage tank certainly, and when liquid flow was greater than 650L/h, the supplementary liquid of accessible supplementary backwash pump flows back. The return line is provided with 0-100L/h, 80-800L/h and 600-6000L/h liquid flow meters for measuring liquid under different flow rates.
Furthermore, the lift tube, the gas distributor, the pipette and the overflow groove are made of organic glass, so that the state of a rising gas-liquid mixture can be observed conveniently.
The invention has the beneficial effects that:
the external liquid lifting pipe is connected with the easily-detachable bolt, so that the operation process of replacing the liquid lifting pipe by the traditional air lifter is simplified, and the flowing condition in the liquid lifting pipe can be observed; the arrangement of the return pipeline can keep the immersion degree of the liquid lifting pipe unchanged in the experiment process, and the operation difficulty of the experiment is reduced. The modularized gas distributor can enable the air lifter to be provided with a liquid lifting pipe with the length of 1-3 m and the diameter of 10-40 mm, is used for researching the lifting performance of the air lifter under different conditions, helps to select the air lifter with proper flow and efficiency in engineering, and saves energy consumption.
Drawings
FIG. 1 is a schematic diagram of an experimental setup for measuring air lifter performance;
FIG. 2 is a schematic diagram of the gas distributor in the airlift.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
According to fig. 1, an experimental apparatus for measuring the performance of an airlift includes: the device comprises an air compressor 1, an air storage tank 2, a freeze dryer 3, a mass flow controller 4, a liquid lifting pipe 5, an overflow tank 6, an auxiliary reflux pump 7, a liquid flow meter 8, an L-shaped water storage tank 9, a gas distributor 10, a pressure reducing valve 12 and a liquid suction pipe 13. Compressed air is used as an air source, the air is pressurized and stored in an air storage tank 2 by using an air compressor 1, the compressed air passes through a pressure reducing valve 12 after being pretreated by a cold dryer 3 and a precision filter, the air inlet pressure is preliminarily adjusted by the pressure reducing valve 12, and two mass flow controllers 4 of 0-50L/min and 30-300L/min are arranged behind the pressure reducing valve 12 and used for controlling and measuring the air inlet flow. The outlet of the mass flow controller 4 is connected with a gas distributor 10, the lower part of the gas distributor 10 is connected with a liquid suction pipe 13 through a flange and a bolt, the liquid suction pipe 13 is inserted into the water storage tank 9 and is connected with the bolt through the flange, and the joint is sealed by a rubber pad. The water storage tank 9 is made of stainless steel, is divided into a straight cylinder section and a lower water tank, is L-shaped as a whole, and is provided with a differential pressure liquid level meter for measuring the liquid level height in the water storage tank 9. The upper part of the gas distributor 10 is connected with the lower end of the riser pipe 5 through a flange and a bolt, the upper part of the riser pipe 5 is connected with the overflow groove 6 through a flange and a bolt, and the joint is sealed by a rubber pad. The liquid conduit within the gas distributor 10 is the same diameter as the riser pipe 5 being tested.
Compressed air enters the lift tube 5 through the gas distributor 10 and mixes with the liquid in the lift tube 5 to form a gas-liquid two-phase flow with relatively low density, and the two-phase flow is lifted to the overflow launder 6 in the lift tube 5. In the overflow vessel 6, the gas and liquid of the two-phase flow are separated from each other. The bottom of the overflow groove 6 is connected with two return pipelines which return to the water storage tank 9, the immersion degree of the air lifter is kept unchanged, one of the return pipelines is provided with an auxiliary return pump 7, when the liquid flow is less than 650L/h, the liquid can automatically flow back to the water storage tank 9 through gravity, and when the liquid flow is more than 650L/h, the auxiliary liquid can flow back through the auxiliary return pump 7. The return lines are provided with 0-100L/h, 80-800L/h and 600-6000L/h flow meters 8 for measuring liquid at different flow rates. The lift pipe 5, the gas distributor 10, the pipette 13 and the overflow groove 6 are made of organic glass materials, so that the state of a rising gas-liquid mixture can be observed conveniently.
Fig. 2 is a schematic view of the structure of the gas distributor 10 in the airlift. The gas distributor 10 comprises a gas injection hole 14, a gas injection pipeline 15 and a gas distribution chamber 16; the gas injection pipe 15 is connected with the gas distribution chamber 16, the lift pipe 5 is vertically penetrated and connected with the gas distribution chamber 16, and the lift pipe 5 is provided with the gas injection holes 14. Compressed air enters the gas distribution chamber 16 from the gas injection pipe 15 and is injected into the lift tube 5 through the gas injection holes 14 to mix with the liquid.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. Experimental device for be used for measuring air lifter performance, its characterized in that: the device comprises an air compressor (1), an air storage tank (2), a freeze dryer (3), a mass flow controller (4), a liquid lifting pipe (5), an overflow groove (6), an auxiliary reflux pump (7), a liquid flow meter (8), an L-shaped water storage tank (9), an air distributor (10), a pressure reducing valve (12) and a liquid suction pipe (13); the air compressor (1) is connected with the air storage tank (2), the outlet at the other end of the air storage tank (2) is connected with the cold dryer (3), the cold dryer (3) is provided with a pressure reducing valve (12), the pressure reducing valve (12) is connected with two mass flow controllers (4), used for controlling and measuring the air inflow, the outlet of the mass flow controller (4) is connected with an air distributor (10), the upper end of the air distributor (10) is connected with the lower end of a riser tube (5) through a flange and a bolt, the upper end of the riser tube (5) extends into an overflow trough (6), the lower end of the gas distributor (10) is connected with a liquid suction pipe (13) through a flange and a bolt, the lower end of the liquid suction pipe (13) is inserted into the L-shaped water storage tank (9), and is connected with a bolt through a flange, the bottom of the overflow groove (6) is connected with a return pipeline, and an auxiliary return pump (7) and three liquid flow meters (8) are sequentially arranged on the return pipeline.
2. An experimental apparatus for measuring performance of an air lifter according to claim 1, characterized in that: the gas distributor (10) comprises a gas injection hole (14), a gas injection pipeline (15) and a gas distribution chamber (16); the gas injection pipeline (15) is connected with the gas distribution chamber (16), the liquid lifting pipe (5) vertically penetrates through the gas distribution chamber (16), and the liquid lifting pipe (5) is provided with a gas injection hole (14); compressed air enters the gas distribution chamber (16) from the gas injection pipe (15) and is injected into the lift tube (5) from the gas injection hole (14) to be mixed with liquid.
3. An experimental apparatus for measuring performance of an air lifter according to claim 1, characterized in that: the two mass flow controllers (4) are 0-50L/min and 30-300L/min.
4. An experimental apparatus for measuring performance of an air lifter according to claim 1, characterized in that: an auxiliary reflux pump (7) is arranged on the reflux pipeline, when the liquid flow is less than 650L/h, the liquid can automatically flow back to the L-shaped water storage tank (9) through gravity, and when the liquid flow is more than 650L/h, the liquid can be assisted to flow back through the auxiliary reflux pump (7); the return line is provided with 0-100L/h, 80-800L/h and 600-6000L/h liquid flow meters (8) for measuring liquid at different flow rates.
5. An experimental apparatus for measuring performance of an air lifter according to claim 1, characterized in that: the lift pipe (5), the gas distributor (10), the liquid suction pipe (13) and the overflow groove (6) are made of organic glass, so that the state of a rising gas-liquid mixture can be observed conveniently.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111410047.1A CN114112467A (en) | 2021-11-25 | 2021-11-25 | Experimental device for be used for measuring air lifter performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111410047.1A CN114112467A (en) | 2021-11-25 | 2021-11-25 | Experimental device for be used for measuring air lifter performance |
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| Publication Number | Publication Date |
|---|---|
| CN114112467A true CN114112467A (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111410047.1A Pending CN114112467A (en) | 2021-11-25 | 2021-11-25 | Experimental device for be used for measuring air lifter performance |
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| Country | Link |
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| CN (1) | CN114112467A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114856952A (en) * | 2022-04-12 | 2022-08-05 | 麦王环境技术股份有限公司 | Air distribution device of air lift pump and air lift pump with air distribution device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2407002Y (en) * | 2000-02-25 | 2000-11-22 | 刘红 | Pneumatic sludge lifting apparatus |
| CN102539284A (en) * | 2011-12-22 | 2012-07-04 | 浙江大学 | Method and device for testing distribution characteristics of gas-liquid two-phase flow of plate-fin heat exchanger |
| CN204142465U (en) * | 2014-09-01 | 2015-02-04 | 江苏大学 | A kind of gas-liquid two-phase flow containing rate controls and gas-liquid two-phase mixing arrangement |
| CN112903328A (en) * | 2021-01-28 | 2021-06-04 | 武汉理工大学 | Liquid-solid two-phase pneumatic lifting test bench |
-
2021
- 2021-11-25 CN CN202111410047.1A patent/CN114112467A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2407002Y (en) * | 2000-02-25 | 2000-11-22 | 刘红 | Pneumatic sludge lifting apparatus |
| CN102539284A (en) * | 2011-12-22 | 2012-07-04 | 浙江大学 | Method and device for testing distribution characteristics of gas-liquid two-phase flow of plate-fin heat exchanger |
| CN204142465U (en) * | 2014-09-01 | 2015-02-04 | 江苏大学 | A kind of gas-liquid two-phase flow containing rate controls and gas-liquid two-phase mixing arrangement |
| CN112903328A (en) * | 2021-01-28 | 2021-06-04 | 武汉理工大学 | Liquid-solid two-phase pneumatic lifting test bench |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114856952A (en) * | 2022-04-12 | 2022-08-05 | 麦王环境技术股份有限公司 | Air distribution device of air lift pump and air lift pump with air distribution device |
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