CN110567181A - Gas-liquid two-phase vortex tube - Google Patents
Gas-liquid two-phase vortex tube Download PDFInfo
- Publication number
- CN110567181A CN110567181A CN201910807834.6A CN201910807834A CN110567181A CN 110567181 A CN110567181 A CN 110567181A CN 201910807834 A CN201910807834 A CN 201910807834A CN 110567181 A CN110567181 A CN 110567181A
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- liquid
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- vortex tube
- pipeline
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/02—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using Joule-Thompson effect; using vortex effect
- F25B9/04—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using Joule-Thompson effect; using vortex effect using vortex effect
Abstract
The invention discloses a gas-liquid two-phase vortex tube, comprising: the vortex chamber is arranged in the pipe body and is used for reducing pressure and accelerating the working medium; the air inlet pipeline is communicated with the vortex chamber, is connected to the top of the pipe body and is provided with an inlet for the working medium to enter the vortex chamber; the gas-liquid separation structure is arranged in the vortex chamber and is used for separating liquid in the working medium; the cold end pipeline is arranged at one end of the body and is provided with a cold end outlet for low-temperature gas to flow out; the hot end pipeline is arranged at the other end of the body and is provided with a hot end outlet for high-temperature gas to flow out; and the liquid pipeline is communicated with the vortex chamber, is arranged at the bottom of the gas-liquid separation structure and is provided with a liquid outlet, wherein the gas-liquid separation structure is a plurality of strip-shaped grooves carved on the inner wall of the body. The gas-liquid two-phase vortex tube can separate liquid under the condition of ensuring that the flow field of the hot end tube is not influenced, and the cold and hot effects of the vortex tube, which are increased by heat absorption of liquid evaporation, are eliminated.
Description
Technical Field
The invention relates to a vortex tube, in particular to a gas-liquid two-phase vortex tube.
Background
the vortex tube is a cold-hot separation device which has small volume, simple structure and no moving parts, and has convenient operation and relatively low manufacturing cost. The conventional vortex tube uses compressed air as working medium to separate the compressed air into a cold air flow to generate cold effect, and another hot air flow is discharged. The vortex tube has the working principle and characteristics that high-pressure gas enters from an inlet of the vortex tube, after expansion and pressure reduction, the high-pressure gas almost enters the vortex chamber in a free vortex mode, the boundary angular velocity of the gas flow is very small, the angular velocity of the central point is very large, the gas flow velocity of the inner layer is gradually reduced and the gas flow velocity of the outer layer is gradually increased in the forward flowing process of the gas flow due to the action of viscous force, so that the power is transmitted from the inner layer to the outer layer, the temperature of the gas flow of the inner layer is reduced, the temperature of the gas flow of the outer layer is increased, the vortex effect is called vortex effect, hot gas. The gas applied by the traditional vortex tube has no vapor-liquid phase change and only has two outlets: a cold gas outlet and a hot gas outlet.
in a carbon dioxide transcritical vapor compression refrigeration cycle, a conventional expansion valve throttling process is an isenthalpic process due to large high and low pressure differences, such as: from 120bar down to 30bar, the irreversible losses due to throttling are large. When the vortex tube is used for replacing the traditional expansion valve, the pressure reduction process is close to the isentropic process, the irreversible loss is reduced, and the cycle performance of the refrigeration system is improved. However, in either a carbon dioxide transcritical vapor compression refrigeration cycle or a subcritical vapor compression refrigeration cycle of the conventional freon, the cooled high-pressure gas or liquid enters a vapor-liquid two-phase region after being depressurized by a vortex tube, and the vortex tube is required to separate the vapor phase of the gas into cold gas and hot gas and also separate the liquid phase of the gas from the cold gas and the hot gas. Otherwise, the liquid phase absorbs heat at the hot end of the vortex tube and evaporates, which results in poor cold-heat separation effect of the vapor phase. Therefore, it is very important to design and develop a new type of gas-liquid two-phase vortex tube capable of liquid separation.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide a gas-liquid two-phase vortex tube.
the invention provides a gas-liquid two-phase vortex tube, which is characterized by comprising the following components: the vortex chamber is arranged in the pipe body and is used for reducing pressure and accelerating the working medium; the air inlet pipeline is communicated with the vortex chamber, is connected to the top of the pipe body, and is provided with an inlet for the working medium to enter the vortex chamber; the gas-liquid separation structure is arranged in the vortex chamber and is used for separating liquid in the working medium; the cold end pipeline is arranged at one end of the pipe body and is provided with a cold end outlet for low-temperature gas to flow out; the hot end pipeline is arranged at the other end of the pipe body and is provided with a hot end outlet for high-temperature gas to flow out; and the liquid pipeline is communicated with the swirl chamber, is arranged at the bottom of the gas-liquid separation structure and is provided with a liquid outlet, wherein the gas-liquid separation structure is a plurality of slit-shaped grooves carved on the inner wall of the pipe body.
In the gas-liquid two-phase vortex tube provided by the invention, the gas-liquid two-phase vortex tube also has the following characteristics: wherein, the shape of the liquid outlet is rectangle, round or bell mouth shape.
in the gas-liquid two-phase vortex tube provided by the invention, the gas-liquid two-phase vortex tube also has the following characteristics: wherein, the strip-shaped grooves are mutually parallel or mutually staggered.
in the gas-liquid two-phase vortex tube provided by the invention, the gas-liquid two-phase vortex tube also has the following characteristics: wherein, the working medium is a gas-liquid two-phase medium.
Action and Effect of the invention
according to the gas-liquid two-phase vortex tube, because the vortex chamber is arranged in the tube body, the working medium can be depressurized and accelerated; because the air inlet pipeline communicated with the vortex chamber is arranged, the working medium can enter the vortex chamber to be depressurized and accelerated; the gas-liquid separation structure is adopted, so that the working medium can be separated; because have cold junction pipeline, hot junction pipeline and liquid pipeline, so can flow out through different nozzles with the liquid and the gas of separating, can also flow out respectively with the gas of different temperatures.
Therefore, the gas-liquid two-phase vortex tube of the embodiment has a simple structure, is convenient to use, separates liquid under the condition of ensuring that the flow field of the hot end pipeline is not influenced, eliminates the cold and hot effects of the vortex tube caused by heat absorption of liquid evaporation, is particularly suitable for a throttling process related to a gas-liquid two-phase vapor compression refrigeration system and a gas-liquid two-phase chemical petroleum system, and improves the refrigerating capacity and the circulation efficiency in the field of vortex tube refrigeration; in the field of petrochemical gas-liquid separation, the device is convenient to maintain, has no moving parts, and also has potential economic value.
Drawings
FIG. 1 is a schematic structural view of a gas-liquid two-phase vortex tube in an embodiment of the invention;
Fig. 2 is a developed schematic view of a gas-liquid separation structure in a gas-liquid two-phase vortex tube in an embodiment of the invention.
Detailed Description
In order to make the technical means and functions of the present invention easy to understand, the present invention is specifically described below with reference to the embodiments and the accompanying drawings.
example (b):
A gas-liquid two-phase vortex tube 100 of the present embodiment includes: swirl chamber 10, inlet line 20, gas-liquid separation structure 30, cold end line 40, hot end line 50 and liquid line 60.
The vortex chamber 10 is provided inside the pipe body for depressurizing and accelerating the working medium.
in this embodiment, the working medium is a gas-liquid two-phase medium.
An inlet duct 20 communicates with the swirl chamber 10, is connected to the top of the pipe body, and has an inlet 21 for the working medium to enter the swirl chamber 10.
The gas-liquid separation structure 30 is arranged in the swirl chamber 10 and used for separating liquid in the working medium, the gas-liquid separation structure 30 is a plurality of slit-shaped grooves engraved on the inner wall of the pipe body, and the slit-shaped grooves are parallel to each other or staggered with each other.
The distance between the gas-liquid separation structure 30 and the gas inlet duct 20 is about the diameter of one gas inlet nozzle 21.
The depth, length and arrangement form of the slots are various, and the specific arrangement form is related to the type, pressure and temperature of the gas-liquid two-phase medium.
the medium in this embodiment is a gas-liquid two-phase medium, and the slit-shaped grooves are parallel to each other.
the working medium can also be a gas-solid two-phase medium or a liquid-solid two-phase medium.
Cold end piping 40 is provided in one end of the tube body with a cold end outlet for the outflow of cryogenic gas.
A hot end pipe 50 is provided at the other end of the tube body with a hot end outlet 51 for the outflow of high temperature gas.
The liquid pipeline 60 is communicated with the vortex chamber 10, is arranged at the bottom of the gas-liquid separation structure 30, and is provided with a liquid outlet 61, and the liquid outlet 61 is rectangular, circular or flared.
In this embodiment, the liquid outlet is rectangular in shape.
when the working medium rotates to flow through the hot end pipeline 50, the centrifugal force of the liquid is large and the liquid is close to the inner wall of the hot end pipeline 50, the liquid drops are captured and collected by the slit-shaped grooves when passing through the gas-liquid separation structure 30, and the liquid drops flow into the liquid pipeline 60 through the liquid outlet 61 under the action of gravity.
The specific process when the gas-liquid two-phase vortex tube 100 of the present embodiment is applied to a carbon dioxide transcritical refrigeration system is as follows:
Supercritical high-pressure carbon dioxide gas from a gas cooler enters an air inlet pipeline 20 through an inlet 21, then is subjected to pressure reduction and acceleration through a vortex chamber 10, then enters a hot end pipeline 50 at a high speed along a tangential direction, and due to pressure reduction, when the supercritical high-pressure carbon dioxide gas passes through a vapor-liquid separation structure 30, carbon dioxide is in a two-phase flow state, and due to the fact that the density of liquid is greater than that of gas, the liquid is close to the wall surface of the hot end pipeline 50 under the action of centrifugal force, liquid drops are captured and gathered by a slit-shaped groove when flowing through the vapor-liquid separation structure 30, flow into a liquid pipeline 60 through a liquid outlet 61 under the action of gravity, and then flow into an evaporator after being merged. The gas carbon dioxide after gas-liquid separation continues to flow along the hot end pipeline and is finally separated into two gas flows with unequal temperatures, the high-temperature carbon dioxide gas flows out from the hot end outlet 51, and the low-temperature carbon dioxide refrigerant flows out from the cold end outlet 41. The liquid separated by the liquid pipe 60 is mixed with the cold gas at the cold outlet 41 and enters the evaporator for evaporation and refrigeration.
The gas-liquid two-phase vortex tube 100 of the embodiment can be used for replacing a traditional expansion valve in a carbon dioxide transcritical vapor compression refrigeration system, can also be used for replacing a traditional expansion valve in a subcritical vapor compression refrigeration system of traditional freon, and can also be used for similar application occasions such as the chemical and petroleum industry for separating gas and liquid phases.
Effects and effects of the embodiments
According to the gas-liquid two-phase vortex tube related to the embodiment, because the vortex chamber is arranged in the tube body, the working medium can be depressurized and accelerated; because the air inlet pipeline communicated with the vortex chamber is arranged, the working medium can enter the vortex chamber to be depressurized and accelerated; the gas-liquid separation structure is adopted, so that the working medium can be separated; because have cold junction pipeline, hot junction pipeline and liquid pipeline, so can flow out through different nozzles with the liquid and the gas of separating, can also flow out respectively with the gas of different temperatures.
Furthermore, when the gas-liquid two-phase vortex tube is used for a carbon dioxide transcritical refrigeration system, the liquid phase in the gas-liquid two-phase vortex tube is separated under the condition of not influencing the cold-heat separation of the vapor phase, and compared with the traditional vortex tube, the gas-liquid two-phase vortex tube can avoid the evaporation of liquid and improve the refrigeration capacity and the circulation efficiency.
For natural gas and oil field gas in China, resources are rich, most throttling devices are used for depressurization treatment at present, the throttling devices are not economical, and the gas-liquid two-phase vortex tube has high efficiency and can be considered to replace the throttling devices. Meanwhile, the heavy hydrocarbon component and part of water vapor in the gas-liquid two-phase vortex tube are liquefied and separated, so that the dew point temperature of the natural gas and the inner field gas is reduced. This may change the current situation of adding antifreeze in the current gas stream, and the economic benefit is considerable.
In conclusion, the gas-liquid two-phase vortex tube of the embodiment has a simple structure, is convenient to use, separates liquid under the condition of ensuring that the flow field of a hot end pipeline is not influenced, eliminates the cold and hot effects of the vortex tube caused by heat absorption of liquid evaporation, is particularly suitable for a throttling process related to a gas-liquid two-phase vapor compression refrigeration system and a gas-liquid two-phase chemical petroleum system, and improves the refrigerating capacity and the circulation efficiency in the field of vortex tube refrigeration; in the field of petrochemical gas-liquid separation, the device is convenient to maintain, has no moving parts, and also has potential economic value.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (4)
1. A gas-liquid two-phase vortex tube, comprising:
The vortex chamber is arranged in the pipe body and is used for reducing pressure and accelerating the working medium;
The air inlet pipeline is communicated with the vortex chamber, is connected to the top of the pipe body, and is provided with an inlet for the working medium to enter the vortex chamber;
the gas-liquid separation structure is arranged in the vortex chamber and is used for separating liquid in the working medium;
The cold end pipeline is arranged at one end of the pipe body and is provided with a cold end outlet for low-temperature gas to flow out;
The hot end pipeline is arranged at the other end of the pipe body and is provided with a hot end outlet for high-temperature gas to flow out; and
A liquid pipeline communicated with the vortex chamber, arranged at the bottom of the gas-liquid separation structure and provided with a liquid outlet,
the gas-liquid separation structure is a plurality of slit-shaped grooves engraved on the inner wall of the pipe body.
2. The gas-liquid two-phase vortex tube of claim 1, wherein:
Wherein the liquid outlet is rectangular, circular or flared.
3. The gas-liquid two-phase vortex tube of claim 1, wherein:
Wherein, the strip-shaped grooves are mutually parallel or mutually staggered.
4. The gas-liquid two-phase vortex tube of claim 1, wherein:
Wherein the working medium is a gas-liquid two-phase medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910807834.6A CN110567181A (en) | 2019-08-29 | 2019-08-29 | Gas-liquid two-phase vortex tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910807834.6A CN110567181A (en) | 2019-08-29 | 2019-08-29 | Gas-liquid two-phase vortex tube |
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| Publication Number | Publication Date |
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| CN110567181A true CN110567181A (en) | 2019-12-13 |
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| CN201910807834.6A Pending CN110567181A (en) | 2019-08-29 | 2019-08-29 | Gas-liquid two-phase vortex tube |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111439113A (en) * | 2020-03-20 | 2020-07-24 | 江苏大学 | Vehicle-mounted oil gas recovery system and method for plug-in hybrid vehicle |
| CN114288805A (en) * | 2021-12-14 | 2022-04-08 | 天地科技股份有限公司 | Colliery air shaft does not have automatic recovery unit of consumption carbon dioxide |
| CN115253618A (en) * | 2022-08-18 | 2022-11-01 | 大连理工大学 | Vortex tube with porous material liquid drainage structure and gas-liquid separation method thereof |
| CN115646075A (en) * | 2022-10-24 | 2023-01-31 | 中国石油大学(华东) | Vertical cascade vortex tube dehydration and dealkylation system |
| WO2024063267A1 (en) * | 2022-09-20 | 2024-03-28 | 충남대학교산학협력단 | Single-flow vortex tube having improved gas separation performance, and gas separation system using same |
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| US20020073848A1 (en) * | 2000-12-14 | 2002-06-20 | Cho Young I. | Vortex generator |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111439113A (en) * | 2020-03-20 | 2020-07-24 | 江苏大学 | Vehicle-mounted oil gas recovery system and method for plug-in hybrid vehicle |
| CN111439113B (en) * | 2020-03-20 | 2022-05-17 | 江苏大学 | Vehicle-mounted oil gas recovery system and method for plug-in hybrid vehicle |
| CN114288805A (en) * | 2021-12-14 | 2022-04-08 | 天地科技股份有限公司 | Colliery air shaft does not have automatic recovery unit of consumption carbon dioxide |
| CN115253618A (en) * | 2022-08-18 | 2022-11-01 | 大连理工大学 | Vortex tube with porous material liquid drainage structure and gas-liquid separation method thereof |
| CN115253618B (en) * | 2022-08-18 | 2023-09-12 | 大连理工大学 | Vortex tube with porous material liquid discharge structure and gas-liquid separation method thereof |
| WO2024063267A1 (en) * | 2022-09-20 | 2024-03-28 | 충남대학교산학협력단 | Single-flow vortex tube having improved gas separation performance, and gas separation system using same |
| CN115646075A (en) * | 2022-10-24 | 2023-01-31 | 中国石油大学(华东) | Vertical cascade vortex tube dehydration and dealkylation system |
| CN115646075B (en) * | 2022-10-24 | 2024-05-03 | 中国石油大学(华东) | Vertical cascade vortex tube dehydration and dealkylation system |
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Application publication date: 20191213 |