CN111089054A - Rotational flow gas phase temperature measuring device in gas-liquid two-phase state and liquid spraying screw compressor system thereof - Google Patents
Rotational flow gas phase temperature measuring device in gas-liquid two-phase state and liquid spraying screw compressor system thereof Download PDFInfo
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- CN111089054A CN111089054A CN202010114719.3A CN202010114719A CN111089054A CN 111089054 A CN111089054 A CN 111089054A CN 202010114719 A CN202010114719 A CN 202010114719A CN 111089054 A CN111089054 A CN 111089054A
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- temperature measuring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/28—Safety arrangements; Monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0092—Removing solid or liquid contaminants from the gas under pumping, e.g. by filtering or deposition; Purging; Scrubbing; Cleaning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/19—Temperature
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
A cyclone gas phase temperature measuring device under a gas-liquid two-phase state comprises a cyclone cylinder, a temperature measuring cylinder and a temperature measuring element; the cyclone cylinder comprises a cylinder cover plate, a cylinder and an inverted cone; the cylinder cover plate covers the upper end of the cylinder, the lower end of the cylinder is connected with the upper end of the inverted cone, and the side surface of the cylinder is provided with an air inlet; the lower end of the inverted cone is provided with a liquid outlet; the temperature measuring cylinder comprises a temperature measuring cylinder cover plate and a temperature measuring cylinder body; the temperature measuring cylinder cover plate covers the upper end of the temperature measuring cylinder body, the lower end of the temperature measuring cylinder body is open, and the temperature measuring cylinder cover plate and the temperature measuring cylinder body jointly define a temperature measuring cavity; the temperature measuring cylinder body penetrates through the cylinder body cover plate, the lower end of the temperature measuring cylinder body extends into the inverted cone, and the side face of the upper end of the temperature measuring cylinder body is provided with an exhaust port; the temperature measuring element penetrates through the cover plate of the temperature measuring cylinder and is inserted into the temperature measuring cavity. The invention also discloses a liquid injection screw compressor system. The invention can accurately measure the temperature of the gas phase medium in the gas-liquid two-phase flow state.
Description
Technical Field
The present invention relates to a temperature measurement technique.
Background
In the process of operation of the process gas screw compressor, in order to control the temperature rise of gas in the compression process and prevent the compressor from being damaged, most of the process gas screw compressors operate in a liquid spraying mode, so that gas-liquid two phases are determined at the outlet of the compressor. Because the retention time of the medium gas in the compression cavity is short, the heat exchange of the gas phase and the liquid phase in the compressor is not fully completed, and therefore the gas phase and the liquid phase at the outlet of the compressor have temperature difference. The existing temperature measuring device cannot accurately measure the temperature of a gas-phase medium in a gas-liquid two-phase flow state under the interference of the liquid-phase medium, so that the reliability of temperature linkage protection at the outlet of a compressor is difficult to ensure, and the compressor is easily damaged due to overtemperature.
Disclosure of Invention
The invention aims to provide a gas phase temperature measuring device for gas-liquid two-phase flow, which can accurately measure the temperature of a gas phase medium in a gas-liquid two-phase flow state, and has simple structure and reliable performance.
The invention provides a cyclone gas-phase temperature measuring device in a gas-liquid two-phase state, which comprises a cyclone cylinder, a temperature measuring cylinder and a temperature measuring element, wherein the cyclone cylinder is arranged in the gas-liquid two-phase state; the cyclone cylinder comprises a cylinder cover plate, a cylinder and an inverted cone; the cylinder cover plate covers the upper end of the cylinder and is connected with the cylinder; the lower end of the cylinder body is connected with the upper end of the inverted cone, and the side surface of the cylinder body is provided with an air inlet; the lower end of the inverted cone is provided with a liquid outlet; the temperature measuring cylinder comprises a temperature measuring cylinder cover plate and a temperature measuring cylinder body; the temperature measuring cylinder cover plate covers the upper end of the temperature measuring cylinder body and is connected with the temperature measuring cylinder body, the lower end of the temperature measuring cylinder body is open, and the temperature measuring cylinder cover plate and the temperature measuring cylinder body jointly define a temperature measuring cavity; the temperature measuring cylinder body penetrates through the cylinder body cover plate, the lower end of the temperature measuring cylinder body extends into the inverted cone, and the side face of the upper end of the temperature measuring cylinder body is provided with an exhaust port; the temperature measuring element penetrates through the cover plate of the temperature measuring cylinder and is inserted into the temperature measuring cavity.
The invention also provides a liquid injection screw compressor system, which comprises a compressor body, an inlet pipeline communicated with the air inlet of the compressor body, an exhaust pipeline communicated with the exhaust port of the compressor body, an inlet liquid injection pipeline communicated with the inlet pipeline, the rotational flow gas phase temperature measuring device in the gas-liquid two-phase state, a drainage tube and a throttle orifice plate, wherein the inlet pipeline is communicated with the air inlet of the compressor body; one end of the drainage tube is communicated with the exhaust pipeline, and the throttle orifice plate is arranged between the other end of the drainage tube and an air inlet of the rotational flow gas-phase temperature measuring device in a gas-liquid two-phase state; and an exhaust port and a liquid outlet of the rotational flow gas phase temperature measuring device in a gas-liquid two-phase state are respectively communicated with the inlet pipeline.
The invention has at least the following advantages:
1. the rotational flow gas phase temperature measuring device of the embodiment can perform liquid phase separation on a gas-liquid two-phase mixture by generating rotational flow, so that the temperature measured by the temperature measuring element is the temperature of a gas phase medium after liquid phase separation, thereby avoiding the interference of the liquid phase medium on the temperature measuring element, realizing the purpose of accurately measuring the temperature of the high-temperature gas phase medium in a gas-liquid two-phase flow state, and ensuring the stable and efficient operation of the liquid injection screw compressor;
2. the invention has simple structure and reliable performance.
Drawings
Fig. 1 is a schematic perspective view of a cyclone gas-phase temperature measurement device in a gas-liquid two-phase state according to an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view illustrating a cyclone gas-phase temperature measuring device in a gas-liquid two-phase state according to an embodiment of the present invention.
FIG. 3 is a schematic diagram showing the overall structure of a liquid spray screw compressor system adopting a rotational flow gas phase temperature measuring device according to an embodiment of the invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Fig. 1 and 2 are schematic structural diagrams illustrating a swirling gas-phase temperature measuring apparatus 100 in a gas-liquid two-phase state according to an embodiment of the present invention. Referring to fig. 1 and 2, the swirling flow gas-phase temperature measuring device 100 in a gas-liquid two-phase state includes a swirling flow cylinder 11, a temperature measuring cylinder 12, a temperature measuring element 13, a temperature measuring device inlet pipe 14, a temperature measuring device outlet pipe 15, and a temperature measuring cylinder outlet pipe 16.
The cyclone container 11 includes a cylindrical cover plate 111, a cylindrical body 112, and an inverted cone 113. The cylinder cover 111 covers the upper end of the cylinder 112 and is connected to the cylinder 112. The cylinder 112 is connected to the upper end of an inverted cone 113, and an air inlet 114 is formed at the side of the cylinder 112. The lower end of the inverted cone 113 is provided with a liquid discharge port 116. The air inlet 114 is opened at the side of the cylindrical body 112 to assist the air flow entering the cyclone tube 11 to form a cyclone.
The temperature measuring cylinder 12 comprises a temperature measuring cylinder cover plate 121 and a temperature measuring cylinder body 122. The cover plate 121 covers the upper end of the barrel body 122 of the temperature measuring barrel and is connected with the barrel body 122 of the temperature measuring barrel, the lower end of the barrel body 122 of the temperature measuring barrel is open, and the cover plate 121 and the barrel body 122 of the temperature measuring barrel jointly define a temperature measuring cavity 120. The temperature measuring cylinder body 122 penetrates through the cylinder cover plate 111, the lower end of the temperature measuring cylinder body 122 extends into the inverted cone 113, and the side surface of the upper end of the temperature measuring cylinder body 122 is provided with an exhaust port 125. The gas outlet 125 is arranged on the upper end side of the temperature measuring cylinder body 122 to be most beneficial to gas outflow.
The temperature measuring element 13 is inserted into the temperature measuring chamber 120 through the cartridge cover plate 121. Optionally, the temperature measuring cylinder cover plate 121 is provided with a threaded through hole 1210, the temperature measuring element 13 is inserted into the temperature measuring chamber 120 through the threaded through hole 1210, and the temperature measuring element 13 is screwed with the threaded through hole 1210. In the present embodiment, the temperature measuring element 13 is a thermal resistor.
The temperature measuring device inlet pipe 14 is connected to a side surface of the cylinder 112 and penetrates the inlet port 114. The exhaust pipe 15 of the temperature measuring device is connected with the upper end side surface of the cylinder body 122 of the temperature measuring cylinder and penetrates through the exhaust port 125. The upper end of the liquid discharge pipe 16 of the temperature measuring device is connected with the lower end of the inverted cone 113 and penetrates through the liquid discharge port 116.
Alternatively, the connection modes adopted between the cylinder cover plate 111 and the cylinder 112, between the temperature measuring cylinder cover plate 121 and the temperature measuring cylinder body 122, between the temperature measuring device air inlet pipe 14 and the side surface of the cylinder 112, between the temperature measuring device air outlet pipe 15 and the upper end side surface of the temperature measuring cylinder body 122, and between the upper end of the temperature measuring device liquid outlet pipe 16 and the lower end of the inverted cone 113 are welding, but the connection modes are not limited to the welding.
Fig. 3 is a schematic diagram showing the overall structure of a liquid spray screw compressor system using the gas phase measurement apparatus 100 according to the embodiment of the present invention. The liquid injection screw compressor system comprises a compressor body 21, an inlet pipeline 22 communicated with an air inlet of the compressor body 21, an exhaust pipeline 23 communicated with an air outlet of the compressor body 21, an inlet liquid injection pipeline 24 communicated with the inlet pipeline 22, a drainage pipe 25, a throttle orifice plate 26, the rotational flow gas phase temperature measuring device 100 in the gas-liquid two-phase state and a control device 300.
In this embodiment, an inlet spray valve set 28 is provided in the inlet spray conduit 24 to regulate the flow rate of the inlet spray. In the operation process of the compressor body 21, in order to prevent the compressor rotor from being occluded with the inner wall of the shell due to overhigh gas phase temperature, liquid is sprayed into the inlet pipeline 22 through the inlet liquid spraying pipeline 24, so that the rotor can be cooled, and meanwhile, the compressor can be sealed.
One end of the draft tube 25 is communicated with the exhaust pipeline 23, and the orifice plate 26 is arranged between the other end of the draft tube 25 and the air inlet 114 of the rotational flow gas-phase temperature measuring device 100 in the gas-liquid two-phase state. The exhaust port 125 and the liquid discharge port 116 of the swirling gas-phase temperature measuring device 100 in the gas-liquid two-phase state are respectively communicated with the inlet pipeline 22. The output of temperature measuring element 13 is connected to the input of control device 300, and the output of control device 300 is connected to the control input of inlet spray valve assembly 28. The control device 300 may be, for example, a PLC controller, but is not limited thereto.
In the present embodiment, the orifice plate 26 is provided between the other end of the draft tube 25 and the temperature measuring device intake tube 14 of the swirling gas-phase temperature measuring device 100 in the gas-liquid two-phase state. One end of the drainage tube 25 is connected with the exhaust pipeline 23 in a welding way, and the throttle orifice plate 26 is clamped and fixed between a flange at the other end of the drainage tube 25 and a flange of the air inlet pipe 14 of the temperature measuring device. The exhaust pipe 15 of the temperature measuring device and the drain pipe 16 of the temperature measuring device 100 are respectively connected with the inlet pipeline 22 in a welding manner in a gas-liquid two-phase state. In other embodiments, the orifice plate 26 may be fixed to the other end of the draft tube 25 by welding.
The medium gas enters the compressor body 21 from the compressor inlet pipeline 22, the liquid spraying medium enters the compressor inlet pipeline 22 through the inlet liquid spraying valve group 28 and the inlet liquid spraying pipeline 24, the inlet liquid spraying medium and the medium gas are mixed in the compressor inlet pipeline 22 and then enter the cavity of the compressor body 21 for compression. The temperature measuring device 13 outputs a temperature signal to the control device 300, and the control device 300 adjusts the valve opening of the inlet spray valve set 28 according to the temperature measurement value to maintain the outlet temperature of the compressor body 21 constant.
The rotational flow gas phase temperature measuring device 100 in a gas-liquid two-phase state is vertically arranged at a position close to the exhaust pipeline 23 of the compressor, a small amount of medium gas containing liquid drops is led out through the drainage pipe 25 and the orifice plate 26, and enters the rotational flow gas phase temperature measuring device from the gas inlet pipe 14 of the temperature measuring device. The exhaust pipe 15 of the temperature measuring device and the liquid discharge pipe 16 of the temperature measuring device are connected back to the inlet pipeline 22 of the compressor, and the inlet and the outlet of the rotational flow gas phase temperature measuring device have pressure difference, so that the flow circulation in the rotational flow gas phase temperature measuring device is ensured.
The flow state inside the swirling flow gas phase temperature measuring device 100 in the gas-liquid two-phase state is as follows: after the medium gas containing liquid drops enters the rotational flow gas phase temperature measuring device 100 from the temperature measuring device air inlet pipe 14, the gas flow is converted from linear motion to circular motion due to the constraint action of the wall surface of the cylinder body 112, and most of the rotational gas flow spirally flows downwards along the wall surface of the cylinder body 112 and flows towards the inverted cone 113, which is called as external rotational flow. The medium gas containing the droplets generates centrifugal force during rotation, and the droplets having a high density are thrown against the wall surface of the cylinder 112 and the wall surface of the inverted cone 113, and once the droplets contact the wall surface of the cylinder and the wall surface of the inverted cone, the droplets lose inertia force, fall along the wall surface of the cylinder and the wall surface of the inverted cone along with the external spiral gas flow at the initial momentum of the inlet velocity, and finally enter the discharge pipe 16 of the temperature measuring device. On the other hand, the pressure of the surrounding medium gas is increased during the rotation of the outer swirling flow, and a low pressure region is formed in the center of the inverted cone 113. Due to the attraction of the low-pressure area, when the airflow reaches a certain position at the lower end of the inverted cone, the airflow approaches the center of the rotational flow gas phase temperature measuring device, namely, the airflow rotates upwards from bottom to top in the rotational flow gas phase temperature measuring device in the same rotating direction and continues to perform spiral motion, namely, the airflow is called as inner rotational flow. Finally, the medium gas is discharged from the exhaust pipe 15 of the temperature measuring device through the temperature measuring cylinder 12, the temperature measured by the temperature measuring element 13 is the gas phase temperature after the liquid drops are separated, the interference of the liquid phase medium to the temperature measuring element 13 is avoided, and the purpose of accurately measuring the gas phase temperature in the gas-liquid two-phase flow state is achieved.
Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the invention should be included in the protection scope of the invention.
Claims (8)
1. The rotational flow gas phase temperature measuring device in a gas-liquid two-phase state is characterized by comprising a rotational flow cylinder, a temperature measuring cylinder and a temperature measuring element;
the cyclone cylinder comprises a cylinder cover plate, a cylinder and an inverted cone; the cylinder cover plate covers the upper end of the cylinder and is connected with the cylinder; the lower end of the cylinder body is connected with the upper end of the inverted cone, and the side surface of the cylinder body is provided with an air inlet; the lower end of the inverted cone is provided with a liquid outlet;
the temperature measuring cylinder comprises a temperature measuring cylinder cover plate and a temperature measuring cylinder body; the temperature measuring cylinder cover plate covers the upper end of the temperature measuring cylinder body and is connected with the temperature measuring cylinder body, the lower end of the temperature measuring cylinder body is open, and the temperature measuring cylinder cover plate and the temperature measuring cylinder body jointly define a temperature measuring cavity; the temperature measuring cylinder body penetrates through the cylinder body cover plate, the lower end of the temperature measuring cylinder body extends into the inverted cone, and the side face of the upper end of the temperature measuring cylinder body is provided with an exhaust port;
the temperature measuring element penetrates through the cover plate of the temperature measuring cylinder and is inserted into the temperature measuring cavity.
2. The gas-liquid two-phase swirling gas phase temperature measuring device of claim 1, wherein the gas-liquid two-phase swirling gas phase temperature measuring device comprises a temperature measuring device inlet pipe, and the temperature measuring device inlet pipe is connected with the side surface of the cylinder and penetrates through the gas inlet.
3. The gas-liquid two-phase swirling gas phase temperature measuring device of claim 1, wherein the gas-liquid two-phase swirling gas phase temperature measuring device comprises a temperature measuring device exhaust pipe, and the temperature measuring device exhaust pipe is connected with the upper end side surface of the temperature measuring cylinder body and penetrates through the exhaust port.
4. The gas-liquid two-phase swirling gas phase temperature measuring device according to claim 1, wherein the gas-liquid two-phase swirling gas phase temperature measuring device comprises a temperature measuring device drain pipe, and an upper end of the temperature measuring device drain pipe is connected with a lower end of the inverted cone and penetrates through the drain port.
5. The swirling gas phase temperature measuring apparatus in a gas-liquid two-phase state according to claim 1, wherein the temperature measuring element is a thermal resistor.
6. A liquid injection screw compressor system comprises a compressor body, an inlet pipeline communicated with an air inlet of the compressor body, an exhaust pipeline communicated with an exhaust outlet of the compressor body and an inlet liquid injection pipeline communicated with the inlet pipeline, and is characterized by further comprising a rotational flow gas phase temperature measuring device, a drainage tube and a throttle orifice plate in a gas-liquid two-phase state according to any one of claims 1 to 5;
one end of the drainage tube is communicated with the exhaust pipeline, and the throttle orifice plate is arranged between the other end of the drainage tube and an air inlet of the rotational flow gas-phase temperature measuring device in a gas-liquid two-phase state; and an exhaust port and a liquid outlet of the rotational flow gas phase temperature measuring device in a gas-liquid two-phase state are respectively communicated with the inlet pipeline.
7. The spray screw compressor system of claim 6, comprising an inlet spray valve bank disposed on the inlet spray line and a control device;
the output end of a temperature measuring element of the rotational flow gas phase temperature measuring device in a gas-liquid two-phase state is connected with the input end of the control device, and the output end of the control device is connected with the control input end of the inlet liquid spraying valve group.
8. The spray screw compressor system of claim 7, wherein the control device is a PLC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010114719.3A CN111089054A (en) | 2020-02-25 | 2020-02-25 | Rotational flow gas phase temperature measuring device in gas-liquid two-phase state and liquid spraying screw compressor system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010114719.3A CN111089054A (en) | 2020-02-25 | 2020-02-25 | Rotational flow gas phase temperature measuring device in gas-liquid two-phase state and liquid spraying screw compressor system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111089054A true CN111089054A (en) | 2020-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010114719.3A Pending CN111089054A (en) | 2020-02-25 | 2020-02-25 | Rotational flow gas phase temperature measuring device in gas-liquid two-phase state and liquid spraying screw compressor system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111089054A (en) |
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2020
- 2020-02-25 CN CN202010114719.3A patent/CN111089054A/en active Pending
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