CN116398457A - Compressor variable working condition adjusting control system and control method - Google Patents

Compressor variable working condition adjusting control system and control method Download PDF

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Publication number
CN116398457A
CN116398457A CN202310416331.2A CN202310416331A CN116398457A CN 116398457 A CN116398457 A CN 116398457A CN 202310416331 A CN202310416331 A CN 202310416331A CN 116398457 A CN116398457 A CN 116398457A
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China
Prior art keywords
compressor
spraying
control system
pressure
guide vane
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CN202310416331.2A
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Chinese (zh)
Inventor
孙建亭
左志涛
张雪辉
侯虎灿
郭欢
陈海生
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Institute of Engineering Thermophysics of CAS
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Institute of Engineering Thermophysics of CAS
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Priority to CN202310416331.2A priority Critical patent/CN116398457A/en
Publication of CN116398457A publication Critical patent/CN116398457A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)

Abstract

The invention provides a compressor variable working condition adjusting control system and a control method, which belong to the technical field of compressed air energy storage, wherein the compressor variable working condition adjusting control system comprises a compressor, an adjusting mechanism, a spraying system, a monitoring system and a control system, the compressor comprises a casing, an inlet guide vane, an impeller, an air inlet channel and an exhaust channel, the adjusting mechanism is connected with the inlet guide vane, the spraying system is connected with the compressor, the monitoring system comprises an inlet pressure detecting piece and an outlet pressure detecting piece, and the control system is electrically connected with the adjusting mechanism, the spraying system and the monitoring system; the control system adjusts the adjusting mechanism and the spraying system according to the monitoring data of the monitoring system. According to the variable working condition adjusting control system of the compressor, which is provided by the invention, according to the pressure data monitored by the monitoring system, the control system is coupled with the two adjusting modes to obtain the highest efficiency of the compressor under different pressure ratios, so that the pressure working range of the compressor can be further widened, the compression ratio work can be reduced, and the operation efficiency can be improved.

Description

Compressor variable working condition adjusting control system and control method
Technical Field
The invention relates to the technical field of compressed air energy storage, in particular to a compressor variable working condition adjusting control system and a control method.
Background
The compressor is one of the core components of the compressed air energy storage system, is a key device in the energy storage process, and for a large-scale compressed air energy storage system, a centrifugal, diagonal flow, axial flow and other turbine compressors are generally adopted. The compressed air energy storage has the requirements of wide exhaust pressure regulation range, high-efficiency operation and the like for the compressor, and the requirements are difficult to meet only by the performance of the compressor, so that the energy storage compressor needs to be provided with a high-efficiency variable working condition regulation system.
The conventional compressor variable-working-condition adjusting means mainly comprise air inlet throttling, air outlet throttling, rotating speed adjusting and adjustable inlet guide vane adjusting. For the turbine compressor for the large-scale compressed air energy storage system, the throttling loss of air inlet throttling and air outlet throttling is large, the economy is poor, the problem of critical rotation speed of a complex shafting is limited, the variable rotation speed adjustment cannot be adopted, and the main efficient variable working condition adjustment means is adjustable inlet guide vane adjustment. The adjustable inlet guide vane adjusting technology can remarkably widen the exhaust pressure adjusting range, so that the compressor can operate at higher efficiency in a wider working condition range, but the adjusting effect of the adjustable inlet guide vane is also worsened along with the gradual deviation of the adjusting angle of the inlet guide vane from the designed inlet angle of the compressor, and the effect of the adjustable inlet guide vane on improving the exhaust pressure is limited.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects that in the prior art, the compressor is subjected to variable-working-condition adjustment only through an inlet guide vane adjustment technology, the adjustment effect is poor along with the gradual deviation of the inlet guide vane adjustment angle from the designed air inlet angle of the compressor, and the effect of the inlet guide vane adjustment on improving the exhaust pressure is limited, so that the variable-working-condition adjustment control system and the control method of the compressor are provided.
In order to solve the technical problem, the invention provides a compressor variable working condition adjusting control system, comprising:
the compressor comprises a casing, an inlet guide vane, an impeller, an air inlet channel and an exhaust channel, wherein the inlet guide vane and the impeller are arranged in the casing, and the air inlet channel, the inlet guide vane, the impeller and the exhaust channel are sequentially arranged along the airflow circulation direction;
the adjusting mechanism is connected with the inlet guide vane and is used for adjusting the angle of the inlet guide vane;
the spraying system is connected with the compressor and is used for spraying into the compressor;
the monitoring system comprises an inlet pressure detection piece and an outlet pressure detection piece, wherein the inlet pressure detection piece is connected with the air inlet passage, and the outlet pressure detection piece is connected with the air outlet passage;
the control system is electrically connected with the adjusting mechanism, the spraying system and the monitoring system; the control system adjusts the adjusting mechanism and the spraying system according to the monitoring data of the monitoring system.
Optionally, the spraying system comprises:
the nozzle integrated pieces are provided with a plurality of groups, the plurality of groups of the nozzle integrated pieces are sequentially arranged on the air inlet channel and the casing along the airflow direction, and the outlet of the nozzle integrated pieces is communicated with the airflow in the compressor;
the spray branch has a plurality of groups, one end of the spray main is connected with the liquid storage device, and the other end of the spray branch is connected with the inlet of the nozzle integration piece through the spray branch.
Optionally, a spray branch pressure detection piece and a spray branch switch valve are arranged on the spray branch; the spraying main path is sequentially provided with a filtering device, a pump body and a flow detection part along the flow direction of liquid.
Optionally, the spraying system further comprises an adjusting bypass, one end of the adjusting bypass is connected with the liquid storage device, the other end of the adjusting bypass is connected with a spraying main path between the pump body and the flow detection piece, and a bypass adjusting valve is arranged on the adjusting bypass.
Optionally, the nozzle assembly has a plurality of groups of nozzles, and the plurality of groups of nozzles are sequentially arranged along the circumferential direction of the air inlet channel or the casing.
Optionally, the nozzle is a two-fluid nozzle.
Optionally, the air inlet and the air outlet are provided with a drainage pipeline at the bottom, and a drainage switch valve is arranged on the drainage pipeline.
Optionally, the monitoring system further comprises:
the gas flow detection piece is arranged in the air inlet passage and the air outlet passage;
the temperature detection piece is arranged in the air inlet passage and the air outlet passage;
the rotating speed detection piece is arranged near the rotating shaft of the impeller and used for detecting the rotating speed of the rotating shaft.
The invention provides a compressor variable working condition adjusting control method, which adopts the compressor variable working condition adjusting control system described in any one of the above, and comprises the following steps:
monitoring inlet pressure and outlet pressure of the compressor to obtain a real-time pressure ratio;
according to a preset control strategy, the angle of the inlet guide vane in the regulating mechanism and the parameters of the spraying system are controlled in real time to be corresponding set values under the real-time pressure ratio.
Optionally, the method for determining the control strategy includes:
performing performance experiment or simulation calculation on the nozzle, and continuously increasing the spraying pressure in a spraying state to obtain a relation curve of the spraying pressure and the spraying quantity of the nozzle;
performing performance experiment or simulation calculation on the compressor, and adjusting the angle of the inlet guide vane to obtain a relation curve of the pressure ratio and the efficiency of the compressor under different angles of the inlet guide vane; adjusting the spraying quantity of a spraying system to obtain a relation curve of the pressure ratio and the efficiency of the compressor under different spraying quantities;
the highest efficiency corresponding to different pressure ratios, the corresponding inlet guide vane angle and the corresponding spraying amount are obtained through an optimizing algorithm, and a mathematical relation between the corresponding pressure ratio, the corresponding inlet guide vane angle and the corresponding spraying amount is fitted and written into a control system.
The technical scheme of the invention has the following advantages:
1. the invention provides a compressor variable working condition adjusting control system, which comprises a casing, an inlet guide vane, an impeller, an air inlet channel and an air exhaust channel, wherein an adjusting mechanism is connected with the inlet guide vane and is used for adjusting the angle of the inlet guide vane, the pre-rotation air flow angle of the inlet guide vane of the compressor is changed, a spraying system is connected with the compressor, the compression temperature rise is reduced by spraying to the compressor, the compression process is closed towards isothermal compression, the compression ratio work is further reduced, and according to pressure data monitored by a monitoring system, the control system is coupled with two adjusting modes to obtain the highest efficiency of the compressor under different pressure ratios, so that the pressure working range of the compressor can be further widened, the compression ratio work is reduced, and the operation efficiency is improved.
2. The invention provides a compressor variable working condition adjusting control system, wherein a spraying system comprises a spraying main path, a spraying branch path and a nozzle integration piece, liquid in a liquid storage device is sprayed into an air inlet channel and a casing through the nozzle integration piece after passing through the spraying main path and the spraying branch path, gas in a compressor is cooled, the effects of reducing power consumption and improving efficiency are realized, the range of spraying in the compressor is improved by the arrangement of a plurality of groups of spraying branch paths, and the cooling effect is further improved.
3. According to the compressor variable working condition adjusting and controlling system provided by the invention, the spray branch pressure detection part is used for monitoring the pressure in the spray branch, the spray branch switching valve is used for controlling the on-off of the spray branch, the filtering device is used for filtering liquid flowing out of the liquid storage device, the phenomenon that impurities in the liquid block the nozzle integration part to influence the spraying effect after a period of working is avoided, and the control system can adjust the spray pressure of the nozzle integration part by controlling the pump body so as to change the average particle size of spray, so that the compressor variable working condition adjusting and controlling system is suitable for the air inlet condition of the compressor under different working conditions.
4. The compressor variable working condition adjusting control system provided by the invention further comprises an adjusting bypass and a bypass adjusting valve arranged on the adjusting bypass, so that the adjusting range of the flow can be further enlarged, the system is suitable for working conditions with smaller flow, the minimum flow of the variable frequency adjustment of the water pump is generally about 30-50% of the design flow, and the system is realized by opening the bypass adjusting valve in the smaller flow range, so that the adaptability is better.
5. According to the compressor variable working condition adjusting control system provided by the invention, the nozzle integrated piece is provided with a plurality of groups of nozzles, and the groups of nozzles are sequentially arranged along the circumferential direction of the air inlet channel or the casing, so that the air of the compressor is fully cooled, the cooling efficiency is improved, the power consumption is further reduced, and the efficiency is improved.
6. According to the compressor variable working condition adjusting and controlling system provided by the invention, the nozzle is a two-fluid nozzle, only low pressure is provided by utilizing the two-fluid nozzle, high gas-liquid flow speed difference can be realized without high temperature, fine atomization of liquid is realized, the wear rate of the nozzle can be effectively reduced by the low pressure, the maintainability is improved, the installation requirements of pipelines and equipment are reduced, and the reliability and the safety of the system are improved.
7. The compressor variable working condition adjusting and controlling system provided by the invention further comprises a drainage pipeline which is arranged at the bottoms of the air inlet channel and the air outlet channel and is used for timely treating accumulated water in the compressor so as to avoid influencing the use of the compressor.
8. According to the compressor variable working condition regulation control system provided by the invention, the gas flow detection part is used for measuring the gas flow in the air inlet passage and the air outlet passage, the temperature detection part is used for measuring the temperature conditions in the air inlet passage and the air outlet passage, the rotating speed detection part is used for detecting the rotating speed of the rotating shaft of the impeller, and the compressor is monitored in multiple aspects, so that the abnormal conditions can be treated in time.
9. According to the compressor variable working condition adjusting control method, the compressor variable working condition adjusting control system is adopted, the monitoring system monitors the inlet pressure and the outlet pressure of the compressor in real time to obtain the real-time pressure ratio, the angle of the inlet guide vane in the adjusting mechanism and the parameters of the spraying system are controlled to be corresponding set values under the real-time pressure ratio in real time according to the control strategy preset in the control system, the wide adjusting range and high-efficiency operation of the compressor are ensured, and the quality of compressed air energy storage is further improved.
10. According to the variable working condition adjusting and controlling method for the compressor, provided by the invention, the relation curve of spray pressure and spray quantity of the nozzle, the relation curve of pressure ratio and efficiency of the compressor under different inlet guide vane angles and the relation curve of pressure ratio and efficiency of the compressor under different spray quantities are fitted with the mathematical relation formula of the corresponding pressure ratio, inlet guide vane angle and spray quantity under the highest efficiency, and the mathematical relation formula is written into a control system, so that the angle of the guide vane and parameters of the spraying system are adjusted in real time according to the pressure ratio under different working conditions, the highest efficiency of the working condition of the compressor is always achieved, and the running economy of the compressor is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of one embodiment of a compressor variable condition adjustment control system provided in an embodiment of the present invention;
FIG. 2 is a schematic view of the compressor of FIG. 1;
FIG. 3 is a schematic view of the arrangement of the spray system of FIG. 1 on a compressor;
FIG. 4 is a plot of spray pressure versus spray amount for a nozzle;
FIG. 5 is a plot of pressure ratio versus efficiency for compressors at different inlet guide vane angles;
FIG. 6 is a graph of compressor pressure ratio versus efficiency for various spray levels.
Reference numerals illustrate:
1. a casing; 2. inlet guide vanes; 3. an air inlet channel; 4. an exhaust passage; 5. an adjusting mechanism; 6. an inlet pressure detecting member; 7. an outlet pressure detecting member; 8. a control system; 9. a nozzle assembly; 10. a spraying main path; 11. a spray branch; 12. a liquid storage device; 13. a spray branch pressure detection member; 14. a spray branch switching valve; 15. a filtering device; 16. a pump body; 17. a flow rate detecting member; 18. adjusting the bypass; 19. a bypass regulating valve; 20. a drainage pipe; 21. and a drain switch valve.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The compressor variable working condition adjusting control system provided by the embodiment adjusts the variable working condition of the compressor, so that the exhaust pressure of the compressor is wide in adjusting range and high in efficiency.
As shown in fig. 1 and fig. 2, a specific implementation manner of the compressor variable-working-condition adjusting control system provided in this embodiment includes a compressor, an adjusting mechanism 5, a spraying system, a monitoring system and a control system 8, where the compressor includes a casing 1, an inlet guide vane 2, an impeller, an air inlet duct 3 and an exhaust duct 4, the inlet guide vane 2 and the impeller are disposed in the casing 1, and the air inlet duct 3, the inlet guide vane 2, the impeller and the exhaust duct 4 are sequentially disposed along an airflow circulation direction; an adjusting mechanism 5 is connected with the inlet guide vane 2 and is used for adjusting the angle of the inlet guide vane 2; the spraying system is connected with the compressor and is used for spraying into the compressor; the monitoring system comprises an inlet pressure detection piece 6 and an outlet pressure detection piece 7, wherein the inlet pressure detection piece 6 is connected with the air inlet channel 3, and the outlet pressure detection piece 7 is connected with the air outlet channel 4; the control system 8 is electrically connected with the regulating mechanism 5, the spraying system and the monitoring system; the control system 8 adjusts the adjusting mechanism 5 and the spraying system according to the monitoring data of the monitoring system.
The compressor can be of an axial flow type, a centrifugal type, an inclined flow type and the like, the arrangement mode can be of a single-stage or multi-stage serial structure, the compressor sucks gas from the air inlet duct 3, the gas flows to the rotor through the inlet guide vane 2, the rotor rotates to apply work to the gas through the impeller, the pressure, the temperature and the speed of the gas are improved, the gas enters the stationary blade at the rear part of the impeller to be decelerated, and part of kinetic energy of the gas is converted into pressure energy. Limited by the influence of surge stall, the turbocompressor has limited supercharging capacity and lower operating efficiency under deviation design working conditions, so that a high-efficiency variable working condition control system is needed, the supercharging range of the compressor can be expanded, and the operating efficiency under each exhaust pressure is improved.
The adjusting mechanism 5 is connected with the inlet guide vane 2, the angle of the inlet guide vane 2 is adjusted by the adjusting mechanism 5, the air inlet pre-rotation flow angle of the compressor is changed, the spraying system is connected with the compressor, the compression temperature rise is reduced by spraying to the compressor, the compression process is close to isothermal compression, the compression ratio work is further reduced, according to pressure data monitored by the monitoring system, the control system is coupled with the two adjusting modes, the highest efficiency of the compressor under different pressure ratios is obtained, the pressure working range of the compressor can be further widened, the compression ratio work is reduced, and the operation efficiency is improved.
The inlet pressure detecting member 6 and the outlet pressure detecting member 7 may be pressure sensors for detecting the operating pressure parameters of the compressor to obtain the operating pressure ratio of the compressor, which is the compression ratio of the compressor, and refers to a value obtained by dividing the absolute pressure of the high pressure side of the compressor by the absolute pressure of the low pressure side of the compressor. The adjustment mechanism 5 includes, but is not limited to, pneumatic drive, electric drive, hydraulic drive, etc., with the specific type being determined by the adjustment requirements and field conditions.
As shown in fig. 1 and 3, the compressor variable-working-condition adjusting and controlling system provided in this embodiment includes a nozzle integration 9, a spraying main path 10 and a spraying branch path 11, the nozzle integration 9 includes a plurality of groups, the plurality of groups of nozzle integration 9 are sequentially disposed on the air inlet channel 3 and the casing 1 along the airflow direction, and an outlet of the nozzle integration 9 is communicated with the airflow in the compressor; the spray main path 10 and the spray branch path 11, the spray branch path 11 has the multiunit, the one end of spray main path 10 is connected with stock solution device 12, the other end of spray branch path 11 passes through spray branch path 11 with the import connection of nozzle integrated piece 9. The liquid in the liquid storage device 12 is sprayed into the air inlet channel 3 and the casing 1 through the nozzle integration piece 9 after passing through the spraying main channel 10 and the spraying branch channel 11, the gas in the compressor is cooled, the effects of reducing power consumption and improving efficiency are realized, the range of spraying in the compressor is improved by the arrangement of a plurality of groups of spraying branch channels 11, and the cooling effect is further improved. The cooling liquid in the liquid storage device 12 can be water, methanol, ethanol, methyl ether, diethyl ether, benzene, etc.
As shown in fig. 1, in the compressor variable-working-condition adjustment control system provided in this embodiment, a spray branch 11 is provided with a spray branch pressure detecting member 13 and a spray branch switching valve 14; the spraying main path 10 is provided with a filtering device 15, a pump body 16 and a flow detecting member 17 in sequence along the flow direction of the liquid. The spray branch pressure detection piece 13 is used for monitoring the pressure in the spray branch 11, the spray branch switch valve 14 is used for controlling the on-off of the spray branch 11, the filter equipment 15 is used for filtering the liquid flowing out of the liquid storage device 12, after a period of working time, the impurity in the liquid is prevented from blocking the nozzle integration piece 9, the spray effect is influenced, the control system 8 can adjust the spray pressure of the nozzle integration piece 9 through the control pump body 16, and then the change of the average particle size of the spray is realized, so as to adapt to the air inlet condition of the compressor under different working conditions.
As shown in fig. 1, the compressor variable-working-condition adjusting control system provided in this embodiment further includes an adjusting bypass 18, one end of the adjusting bypass 18 is connected to the liquid storage device 12, the other end of the adjusting bypass 18 is connected to the spraying main path 10 between the pump body 16 and the flow detecting member 17, and a bypass adjusting valve 19 is disposed on the adjusting bypass 18. The bypass 18 and the bypass regulating valve 19 arranged on the bypass 18 are regulated, so that the flow regulating range can be further enlarged, when the flow is larger, the bypass regulating valve 19 is opened, a part of liquid is returned to the liquid storage device 12, the liquid storage device is suitable for the working condition of smaller flow, the minimum flow of the variable frequency regulation of the water pump is generally about 30-50% of the design flow, and when the flow is smaller, the variable frequency regulation of the water pump is realized by opening the bypass regulating valve 19, so that the adaptability is better.
According to the compressor variable working condition adjusting control system, the nozzle integration piece 9 is provided with a plurality of groups of nozzles, the plurality of groups of nozzles are sequentially arranged along the circumferential direction of the air inlet channel 3 or the casing 1, the air of the compressor is fully cooled, the cooling efficiency is improved, the power consumption is further reduced, and the efficiency is improved. The arrangement of the nozzles may be a full circumference arrangement, a partial arc length arrangement, a spaced arc length arrangement, or the like. The specific arrangement scheme can be determined according to the actual operation condition and the structural characteristics.
The compressor variable working condition adjusting and controlling system provided by the embodiment is characterized in that the nozzle is a two-fluid nozzle. By utilizing the two-fluid nozzle, only lower pressure is provided, high gas-liquid flow speed difference can be realized without high temperature, fine atomization of liquid is realized, the lower pressure effectively reduces the abrasion rate of the nozzle, improves maintainability, reduces the installation requirements of pipelines and equipment, and improves the reliability and safety of the system. The gas used in the two-fluid nozzle can be air, nitrogen, carbon dioxide, natural gas and the like, and a gas channel of the two-fluid nozzle can be connected with the exhaust passage 4 of the compressor, so that an external gas source is not needed, the self-circulation of the gas is realized, and the economy is improved. In addition, as alternative embodiments, the nozzles may be of other types, such as striker type atomizing nozzles, swirl type atomizing nozzles, high pressure type atomizing nozzles, ultrasonic type atomizing nozzles, etc., the nozzle pattern, number and number of spray branches being determined according to the adjustment requirements and site conditions.
As shown in fig. 1, the compressor variable-working-condition adjusting control system provided in this embodiment further includes a drain pipeline 20, the bottoms of the air inlet channel 3 and the air outlet channel 4 are provided with the drain pipeline 20, and a drain switch valve 21 is provided on the drain pipeline 20. And the accumulated water in the compressor is timely treated, so that the influence on the use of the compressor is avoided. Specifically, the drain switch valve 21 may be an electromagnetic switch valve, connected to the control system 8, and controlled to switch by the control system 8, or may be an automatic drain valve, and the switch may be controlled periodically by the mechanical structure of the valve body, and the specific type is determined according to the adjustment requirement and the field condition.
The compressor variable working condition adjusting control system provided by the embodiment further comprises a gas flow detection piece, a temperature detection piece and a rotating speed detection piece, wherein the gas flow detection piece is arranged in the gas inlet channel and the gas outlet channel; the temperature detection parts are arranged in the air inlet passage and the air outlet passage; the rotating speed detection piece is arranged near the rotating shaft of the impeller and is used for detecting the rotating speed of the rotating shaft. The compressor is monitored in multiple aspects, so that abnormal conditions can be handled in time.
The embodiment also provides a compressor variable working condition adjusting control method, which adopts the compressor variable working condition adjusting control method described in the embodiment, and comprises the following steps:
monitoring inlet pressure and outlet pressure of the compressor to obtain a real-time pressure ratio;
according to a preset control strategy, the angle of the inlet guide vane in the regulating mechanism 5 and the parameters of the spraying system are controlled in real time to be corresponding set values under the real-time pressure ratio. The compressor is ensured to operate in a wide adjusting range and high efficiency, and the quality of compressed air energy storage is further improved. The angle of the inlet guide vane 2 is adjusted through the adjusting mechanism 5, and a pump body 16, a spray branch switching valve 14 and a bypass adjusting valve 19 in the spray system can be adjusted, so that the spray quantity in the spray system can be adjusted.
The method for adjusting and controlling the variable working condition of the compressor, provided by the embodiment, comprises the following steps of:
performing performance experiment or simulation calculation on the nozzle, and continuously increasing the spraying pressure in a spraying state to obtain a relation curve of the spraying pressure and the spraying quantity of the nozzle; the spray quantity is increased and then stabilized along with the increase of the spray pressure, the spray pressure is increased to a certain extent, the spray quantity is kept unchanged and is not increased any more, the critical spray pressure is different for each type of nozzle, and the relationship between the spray quantity and the spray pressure in the critical spray pressure range is fitted, as shown in fig. 4.
Performing performance experiment or simulation calculation on the compressor, and adjusting the angle of the inlet guide vane to obtain a relation curve of the pressure ratio and the efficiency of the compressor under different angles of the inlet guide vane; in each performance curve, the efficiency increases and decreases with increasing pressure ratio; the angle adjusting range of the inlet guide vane of the conventional turbine compressor is-60 degrees to +20 degrees, the pressure ratio of the performance curve is integrally improved along with the increase of the angle of the inlet guide vane, but the highest efficiency is improved firstly and then reduced, and the highest value is achieved when the angle of the inlet guide vane is about 0 degree, as shown in fig. 5, the broken line in the figure is a connecting line of the highest efficiency corresponding to each pressure ratio of different angles of the inlet guide vane.
Adjusting the spraying quantity of a spraying system to obtain a relation curve of the pressure ratio and the efficiency of the compressor under different spraying quantities; as the spray amount increases, the pressure ratio and efficiency of the performance curve increase as a whole, and when the spray amount increases to a certain extent, the pressure ratio and efficiency of the performance curve start to decrease, and the spray amount is the maximum available spray amount, and as shown in fig. 6, the broken line in the figure is the line of the highest efficiency corresponding to each pressure ratio under different spray amounts, the curve at the leftmost side is the non-spray amount, and the curve from the left to the back is the spray amount gradually increasing.
The highest efficiency corresponding to different pressure ratios, the corresponding inlet guide vane angle and the corresponding spraying amount are obtained through an optimizing algorithm, and a mathematical relation between the corresponding pressure ratio, the corresponding inlet guide vane angle and the corresponding spraying amount is fitted and written into a control system. The method realizes the real-time adjustment of the angle of the guide vane and the parameters of the spraying system according to the pressure ratio under different working conditions, so that the compressor always has the highest efficiency under the working conditions, and the running economy of the compressor is further improved.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.

Claims (10)

1. A compressor variable condition adjustment control system, comprising:
the compressor comprises a casing (1), an inlet guide vane (2), an impeller, an air inlet channel (3) and an exhaust channel (4), wherein the inlet guide vane (2) and the impeller are arranged in the casing (1), and the air inlet channel (3), the inlet guide vane (2), the impeller and the exhaust channel (4) are sequentially arranged along the airflow circulation direction;
an adjusting mechanism (5) connected with the inlet guide vane (2) and used for adjusting the angle of the inlet guide vane (2);
the spraying system is connected with the compressor and is used for spraying into the compressor;
the monitoring system comprises an inlet pressure detection piece (6) and an outlet pressure detection piece (7), wherein the inlet pressure detection piece (6) is connected with the air inlet passage (3), and the outlet pressure detection piece (7) is connected with the air outlet passage (4);
the control system (8) is electrically connected with the adjusting mechanism (5), the spraying system and the monitoring system; the control system (8) adjusts the adjusting mechanism (5) and the spraying system according to the monitoring data of the monitoring system.
2. The compressor variable condition adjustment control system of claim 1, wherein the spray system comprises:
the nozzle integration pieces (9) are provided with a plurality of groups, the plurality of groups of the nozzle integration pieces (9) are sequentially arranged on the air inlet channel (3) and the casing (1) along the airflow direction, and the outlet of the nozzle integration pieces (9) is communicated with the airflow in the compressor;
the spraying device comprises a spraying main path (10) and a spraying branch path (11), wherein the spraying branch paths (11) are provided with a plurality of groups, one end of the spraying main path (10) is connected with a liquid storage device (12), and the other end of the spraying branch path (11) is connected with an inlet of the nozzle integration piece (9) through the spraying branch path (11).
3. The compressor variable-working condition adjustment control system according to claim 2, characterized in that the spray branch (11) is provided with a spray branch pressure detecting member (13) and a spray branch switching valve (14); the spraying main path (10) is sequentially provided with a filtering device (15), a pump body (16) and a flow detection part (17) along the flow direction of liquid.
4. A compressor variable-duty regulation control system according to claim 3, characterized in that the spray system further comprises a regulation bypass (18), one end of the regulation bypass (18) is connected with the liquid storage device (12), the other end of the regulation bypass (18) is connected with the spray main (10) between the pump body (16) and the flow detection member (17), and a bypass regulation valve (19) is provided on the regulation bypass (18).
5. The compressor variable-operating-condition adjustment control system according to claim 2, characterized in that the nozzle integration (9) has a plurality of groups of nozzles, which are arranged in sequence in the circumferential direction of the intake duct (3) or the casing (1).
6. The compressor variable condition adjustment control system of claim 5, wherein the nozzle is a two-fluid nozzle.
7. The compressor variable-operating-condition adjustment control system according to any one of claims 1 to 6, further comprising a drain pipe (20), wherein the drain pipe (20) is provided at the bottom of the intake duct (3) and the exhaust duct (4), and a drain switch valve (21) is provided on the drain pipe (20).
8. The compressor variable condition adjustment control system of claim 1, wherein the monitoring system further comprises:
the gas flow detection piece is arranged in the air inlet passage and the air outlet passage;
the temperature detection piece is arranged in the air inlet passage and the air outlet passage;
the rotating speed detection piece is arranged near the rotating shaft of the impeller and used for detecting the rotating speed of the rotating shaft.
9. A compressor variable working condition adjusting control method is characterized in that: the compressor variable condition adjustment control system of any one of claims 1-8, comprising the steps of:
monitoring inlet pressure and outlet pressure of the compressor to obtain a real-time pressure ratio;
according to a preset control strategy, the angle of the inlet guide vane in the regulating mechanism (5) and the parameters of the spraying system are controlled to be corresponding set values under the real-time pressure ratio in real time.
10. The compressor variable operating condition adjustment control method according to claim 9, characterized in that: the method for determining the control strategy comprises the following steps:
performing performance experiment or simulation calculation on the nozzle, and continuously increasing the spraying pressure in a spraying state to obtain a relation curve of the spraying pressure and the spraying quantity of the nozzle;
performing performance experiment or simulation calculation on the compressor, and adjusting the angle of the inlet guide vane to obtain a relation curve of the pressure ratio and the efficiency of the compressor under different angles of the inlet guide vane; adjusting the spraying quantity of a spraying system to obtain a relation curve of the pressure ratio and the efficiency of the compressor under different spraying quantities;
the highest efficiency corresponding to different pressure ratios, the corresponding inlet guide vane angle and the corresponding spraying amount are obtained through an optimizing algorithm, and a mathematical relation between the corresponding pressure ratio, the corresponding inlet guide vane angle and the corresponding spraying amount is fitted and written into a control system.
CN202310416331.2A 2023-04-18 2023-04-18 Compressor variable working condition adjusting control system and control method Pending CN116398457A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310416331.2A CN116398457A (en) 2023-04-18 2023-04-18 Compressor variable working condition adjusting control system and control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310416331.2A CN116398457A (en) 2023-04-18 2023-04-18 Compressor variable working condition adjusting control system and control method

Publications (1)

Publication Number Publication Date
CN116398457A true CN116398457A (en) 2023-07-07

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Application Number Title Priority Date Filing Date
CN202310416331.2A Pending CN116398457A (en) 2023-04-18 2023-04-18 Compressor variable working condition adjusting control system and control method

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Country Link
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