Anti-surge control method and device, compressor system, storage medium and program product

Abstract

The embodiment of the invention discloses an anti-surge control method and device for a compressor, the compressor, a storage medium and a program product. Wherein an inlet pressure measuring module and an inlet regulating valve are arranged on the gas inlet side of the compressor, and an outlet pressure measuring module and an outlet regulating valve are arranged on the gas outlet side of the compressor; the method comprises the steps that the current inlet pressure, measured by an inlet pressure measuring module, of a compressor and the current outlet pressure, measured by an outlet pressure measuring module, of the compressor are obtained, and the current pressure difference of an inlet and an outlet of the compressor is calculated; comparing the current pressure difference with a set pressure difference threshold value to obtain a regulation and control parameter; determining a current control interval from a predetermined split-range control model based on the regulation and control parameters; and on the basis of the current control interval, opening control is conducted on at least one of the inlet adjusting valve and the outlet adjusting valve. According to the technical scheme, the surge risk of the compressor can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of control technologies, and in particular to an anti-surge control method, device, compressor system, computer-readable storage medium, and computer program product for a compressor. Background Art

[0002] Surge is an unstable phenomenon during the operation of a compressor, which can lead to increased vibration of the equipment. Short-term surge will not cause much impact on the compressor except for changing the thrust magnitude. However, long-term surge will accelerate the fatigue of internal parts of the compressor and rapidly expand existing cracks, and in severe cases, it can lead to irreparable damage or even explosion of the engine.

[0003] When a compressor surges, typical phenomena include:

[0004] (1) The outlet pressure of the compressor initially rises and then drops sharply, with large periodic fluctuations.

[0005] (2) The flow rate of the compressor drops sharply and fluctuates greatly. In severe cases, air even flows back into the suction pipeline.

[0006] (3) The indications of the current and power meter of the motor driving the compressor are unstable and fluctuate greatly.

[0007] (4) The machine generates strong vibrations and at the same time emits abnormal airflow noises.

[0008] Currently, there are three common methods to solve surge:

[0009] (1) Adding a bleed valve to the compressor, such as a tail relief valve, so that excess gas can be discharged.

[0010] (2) Using a two-rotor or three-rotor compressor.

[0011] (3) Using adjustable blades.

[0012] In addition, those skilled in the art are also working on finding other anti-surge solutions. Summary of the Invention

[0013] In view of this, on the one hand, an anti-surge control method for a compressor is proposed in an embodiment of the present application, and on the other hand, an anti-surge control device, compressor, computer-readable storage medium, and program product for a compressor are proposed to avoid the occurrence of surge phenomenon of the compressor and improve the operation stability of the compressor.

[0014] A surge prevention control method for a compressor proposed in an embodiment of the present application. An inlet pressure measurement module and an inlet regulating valve are provided on the gas inlet side of the compressor, and an outlet pressure measurement module and an outlet regulating valve are provided on the gas outlet side of the compressor. The method includes: obtaining the current inlet pressure of the compressor measured by the inlet pressure measurement module and the current outlet pressure of the compressor measured by the outlet pressure measurement module; calculating a current pressure difference between the inlet and outlet of the compressor based on the current inlet pressure and the current outlet pressure; comparing the current pressure difference with a set pressure difference threshold, and obtaining a regulation parameter based on the comparison result; determining a current control interval from a pre-determined split-range control model based on the regulation parameter; and controlling the opening degree of at least one of the inlet regulating valve and the outlet regulating valve based on the current control interval.

[0015] In one embodiment, the set pressure difference threshold is: a pre-set pressure difference range or pressure difference value according to process requirements and the operating conditions of the compressor.

[0016] In one embodiment, the pre-determined split-range control model is: the current split-range control model pre-selected from multiple split-range control models according to process requirements and the operating conditions of the compressor.

[0017] In one embodiment, the multiple split-range control models include at least one of the following split-range control models:

[0018] The first split-range control model includes adjacent first and second control intervals. The first control interval corresponds to a control curve of the opening degree of the inlet regulating valve from the maximum to the minimum, and the second control interval corresponds to a control curve of the opening degree of the outlet regulating valve from the minimum to the maximum.

[0019] The second split-range control model includes adjacent third and fourth control intervals. The third control interval corresponds to a control curve of the opening degree of the inlet regulating valve from the maximum to the minimum, and the fourth control interval corresponds to a control curve of the opening degree of the outlet regulating valve from the maximum to the minimum.

[0020] The third split-range control model includes adjacent fifth and sixth control intervals. The fifth control interval corresponds to a control curve of the opening degree of the inlet regulating valve from the minimum to the maximum, and the sixth control interval corresponds to a control curve of the opening degree of the outlet regulating valve from the minimum to the maximum.

[0021] The fourth split-range control model includes adjacent seventh and eighth control intervals. The seventh control interval corresponds to the control curve of the opening degree of the inlet control valve from the minimum to the maximum, and the eighth control interval corresponds to the control curve of the opening degree of the outlet control valve from the maximum to the minimum.

[0022] The fifth split-range control model includes a ninth control interval, and the ninth control interval corresponds to the control curve of the opening degree of the inlet control valve from the maximum to the minimum and the opening degree of the outlet control valve from the minimum to the maximum.

[0023] In one embodiment, comparing the current pressure difference with a set pressure difference threshold and obtaining a regulation parameter based on the comparison result includes: comparing the current pressure difference with the set pressure difference threshold based on the PID control algorithm and obtaining a regulation parameter based on the comparison result.

[0024] An anti-surge control device for a compressor proposed in an embodiment of the present application. An inlet pressure measurement module and an inlet control valve are provided on the gas inlet side of the compressor, and an outlet pressure measurement module and an outlet control valve are provided on the gas outlet side of the compressor. The device includes: a pressure difference calculation module configured to obtain the current inlet pressure of the compressor measured by the inlet pressure measurement module and the current outlet pressure of the compressor measured by the outlet pressure measurement module, and calculate the current pressure difference between the inlet and outlet of the compressor based on the current inlet pressure and the current outlet pressure; and a pressure difference control module configured to compare the current pressure difference with a set pressure difference threshold, obtain a regulation parameter based on the comparison result, determine a current control interval from a set split-range control model based on the regulation parameter, and send a signal for opening degree control to at least one of the inlet control valve and the outlet control valve based on the current control interval.

[0025] An anti-surge control device for a compressor proposed in an embodiment of the present application. An inlet pressure measurement module and an inlet control valve are provided on the gas inlet side of the compressor, and an outlet pressure measurement module and an outlet control valve are provided on the gas outlet side of the compressor. The device includes: at least one memory and at least one processor. The at least one memory is configured to store a computer program, and the at least one processor is configured to call the computer program stored in the at least one memory and execute the anti-surge control method of the compressor as described above.

[0026] A compressor system proposed in an embodiment of the present application includes: a gas volume regulation system, a pressure measurement system, and the surge control device as described above; wherein, the gas volume regulation system includes: an inlet control valve, which is arranged on the gas inlet side of the compressor and is used to control the gas volume entering the compressor by adjusting its own opening degree; and an outlet control valve, which is arranged on the gas outlet side of the compressor and is used to control the outlet gas volume of the compressor by adjusting its own opening degree; the pressure measurement system includes: an inlet pressure measurement module, which is arranged on the gas inlet side of the compressor and is used to measure the current inlet pressure of the compressor; and an outlet pressure measurement module, which is arranged on the gas outlet side of the compressor and is used to measure the current outlet pressure of the compressor.

[0027] A computer-readable storage medium proposed in an embodiment of the present application has a computer program stored thereon; the computer program can be executed by a processor and implement the surge control method of the compressor as described above.

[0028] A computer program product proposed in an embodiment of the present application includes a computer program; the computer program can be executed by a processor and implement the surge control method of the compressor as described above.

[0029] As can be seen from the above solution, in the embodiment of the present application, since an inlet pressure measurement module and an inlet control valve are arranged on the gas inlet side of the compressor, and an outlet pressure measurement module and an outlet control valve are arranged on the gas outlet side of the compressor, and the opening degree of the control valve is controlled by calculating the pressure difference between the inlet and outlet of the compressor, so as to adjust the volume ratio between the inlet and outlet of the compressor, thereby changing the operating condition point of the compressor, making it far away from the surge area, effectively reducing the risk of compressor surge. In addition, the stability of the compressor is improved, the shutdown loss is reduced, the energy consumption is reduced, and the operating efficiency of the equipment is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following will make the above and other features and advantages of the present invention clearer to those of ordinary skill in the art by describing the preferred embodiments of the present invention in detail with reference to the drawings, wherein:

[0031] Figure 1 is an exemplary flowchart of the surge control method of the compressor in an embodiment of the present application.

[0032] Figures 2A to 2E is a schematic diagram of different split-range control models in an embodiment of the present application.

[0033] Figure 3 is a partial exemplary structural diagram of a compressor system including a surge control device in an embodiment of the present application.

[0034] Figure 4Exemplary structural diagram of an anti-surge control device for a compressor in an embodiment of the present application.

[0035] Figure 5 Schematic flow chart of the working process of a compressor system in an example of the present application.

[0036] Among them, the reference numerals are as follows:

[0037]

[0038] Detailed implementation manners

[0039] In an embodiment of the present application, it is considered that surge is an unstable operating state of a compressor during operation due to too low flow rate or sudden change of system conditions. Taking the case of too low flow rate as an example, when the compressor speed is constant and the intake air volume of the compressor decreases to a certain value, it will cause uneven gas velocity and reverse flow in the blade passage (the "blade passage" is a key structure on the compressor impeller and plays a crucial role in the intake, compression, and discharge of gas). When this phenomenon spreads to the entire blade passage and the gas in the blade passage cannot flow out, it will cause a sudden drop in pressure in the compressor stage, and the relatively higher pressure behind the stage will reverse-press the air flow back into the stage. The pressure in the stage returns to normal, and the impeller operation also returns to normal, and the reversed air flow is pressed out again. After that, the pressure in the stage suddenly drops again, and the air flow reverses again. This phenomenon repeats, and the compressor operation is unstable, that is, the surge phenomenon.

[0040] To solve the above problems, in an embodiment of the present application, it is considered to start from the pressure difference between the inlet and outlet of the compressor and try to avoid the occurrence of surge phenomenon by precisely controlling the pressure difference between the inlet and outlet of the air compressor. For this purpose, in an embodiment of the present application, it is considered to set an inlet pressure measurement module and an inlet regulating valve on the gas inlet side of the compressor, and set an outlet pressure measurement module and an outlet regulating valve on the gas outlet side of the compressor. Among them, the inlet pressure measurement module is used to measure the inlet pressure of the compressor, and the outlet pressure measurement module is used to measure the outlet pressure of the compressor. The inlet regulating valve is used to control the gas volume entering the compressor by adjusting its own opening degree, and the outlet regulating valve is used to control the outlet gas volume of the compressor by adjusting its own opening degree. By using the inlet pressure measurement module and the outlet pressure measurement module to obtain the inlet pressure and outlet pressure of the compressor respectively, and then obtaining the inlet and outlet pressure difference, comparing the obtained inlet and outlet pressure difference with the set pressure difference threshold, and then controlling the opening degrees of the inlet regulating valve and / or the outlet regulating valve to adjust the volume ratio between the inlet and outlet of the compressor, so as to change the operating condition point of the compressor and make it away from the surge area.

[0041] To better understand the purpose, technical solution, and effects of this application, the specific implementation of this application will now be described with reference to the accompanying drawings. In the figures, the same reference numerals represent components with the same or similar structures but the same functions.

[0042] In this document, "exemplary" and "schematic" mean "serving as an example, instance, or illustration". Any illustration or implementation described as "exemplary" or "schematic" in this document should not be construed as a more preferred or advantageous technical solution.

[0043] To simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product.

[0044] In this document, "a" not only means "only one" but also can mean "more than one". In this document, "first", "second", etc. are only used for differentiation from each other, rather than indicating their importance level, order, etc. "Including" means "including but not limited to", and "according to..." means "at least according to..., but not limited to only according to...".

[0045] Figure 1 This is an exemplary flowchart of the anti-surge control method for a compressor in an embodiment of this application. In this embodiment, an inlet pressure measurement module and an inlet regulating valve are provided on the gas inlet side of the compressor, and an outlet pressure measurement module and an outlet regulating valve are provided on the gas outlet side of the compressor. As Figure 1 shown, the method may include the following steps:

[0046] Step S11, obtain the current inlet pressure of the compressor measured by the inlet pressure measurement module and the current outlet pressure of the compressor measured by the outlet pressure measurement module.

[0047] Specifically, the inlet pressure measurement module and the outlet pressure measurement module can be pressure sensors.

[0048] Step S12, calculate the current pressure difference between the inlet and outlet of the compressor based on the current inlet pressure and the current outlet pressure.

[0049] Step S13, compare the current pressure difference with a set pressure difference threshold, and obtain a regulation parameter based on the comparison result. Among them, this regulation parameter is used to make the pressure difference between the inlet and outlet of the compressor tend to the set pressure difference threshold.

[0050] Among them, the set pressure difference threshold can be: a desired pressure difference range or a target pressure difference value preset according to process requirements and the operating conditions of the compressor.

[0051] In this step, the current pressure difference can be compared with a set pressure difference threshold based on the PID (Proportion Integration Differentiation) control algorithm, and a regulation parameter that makes the pressure difference between the inlet and outlet of the compressor tend towards the pressure difference threshold can be obtained based on the comparison result.

[0052] Step S14: Determine the current control interval from a pre-determined split-range control model based on the regulation parameter.

[0053] Among them, the pre-determined split-range control model can be: the current split-range control model pre-selected from multiple split-range control models according to process requirements and the operating conditions of the compressor.

[0054] In one example, the multiple split-range control models include at least one of the split-range control models as Figures 2A to 2E shown. Figures 2A to 2E In the figure, the ordinate is the opening degree of the regulating valve, and the abscissa is the range value of the regulation parameter. Specific data are not shown in the figure. Different types of control algorithms can obtain different regulation parameter values. If taking a PID controller as an example, the abscissa in the figure is the OP output based on the PID controller, and its output range is 0 - 100%. The user can set a split-range control model for the PID controller according to different process requirements. For example, it can be any one of the models in Figures 2A to 2E . The split-range control model is: the control curve set for the output OP of the PID controller.

[0055] As Figure 2A shown, the first split-range control model C1 includes adjacent first control interval C11 and second control interval C12. The first control interval C11 corresponds to the control curve of the opening degree of the inlet regulating valve from the maximum to the minimum, and the second control interval C12 corresponds to the control curve of the opening degree of the outlet regulating valve from the minimum to the maximum.

[0056] As Figure 2B shown, the second split-range control model C2 includes adjacent third control interval C21 and fourth control interval C22. The third control interval C21 corresponds to the control curve of the opening degree of the inlet regulating valve from the maximum to the minimum, and the fourth control interval C22 corresponds to the control curve of the opening degree of the outlet regulating valve from the maximum to the minimum.

[0057] As Figure 2C shown, the third split-range control model C3 includes adjacent fifth control interval C31 and sixth control interval C32. The fifth control interval C31 corresponds to the control curve of the opening degree of the inlet regulating valve from the minimum to the maximum, and the sixth control interval C32 corresponds to the control curve of the opening degree of the outlet regulating valve from the minimum to the maximum.

[0058] As Figure 2D shown, the fourth split-range control model C4 includes adjacent seventh control interval C41 and eighth control interval C42. The seventh control interval C41 corresponds to the control curve of the opening degree of the inlet regulating valve from the minimum to the maximum, and the eighth control interval C42 corresponds to the control curve of the opening degree of the outlet regulating valve from the maximum to the minimum.

[0059] As Figure 2E shown, the fifth split-range control model C5 includes a ninth control interval C51. The ninth control interval C51 corresponds to the control curve of the opening degree of the inlet regulating valve from the maximum to the minimum and the opening degree of the outlet regulating valve from the minimum to the maximum.

[0060] In addition, in other examples, there are many other types of split-range control models, which will not be elaborated here one by one.

[0061] Step S15, based on the current control interval, control the opening degree of at least one of the inlet regulating valve and the outlet regulating valve.

[0062] For example, taking the split-range control model as the one shown as Figure 2A shown, if the current regulation parameter corresponds to the first control interval C11, control the inlet regulating valve to adjust to the opening degree corresponding to the regulation parameter; if the current regulation parameter corresponds to the second control interval C12, control the outlet regulating valve to adjust to the opening degree corresponding to the regulation parameter.

[0063] Generally, when the pressure difference is too large, it may be necessary to reduce the gas volume entering the compressor to reduce the outlet pressure, thereby reducing the pressure difference. At this time, the pressure difference control system will output a control signal to adjust the opening degree of the inlet regulating valve to reduce the intake volume. When the pressure difference is too small, it may be necessary to increase the pressure difference by adjusting the outlet flow rate. At this time, it can be achieved by adjusting the opening degree of the outlet regulating valve, for example, by increasing the outlet resistance or recycling part of the gas to maintain a stable pressure difference.

[0064] In the embodiments of the present application, through real-time pressure difference monitoring and adjustment, it is possible to quickly respond to changes in the system pressure and keep the pressure difference within the set range by adjusting the opening degrees of the inlet and outlet regulating valves and / or the inlet regulating valve. This real-time control helps to prevent the occurrence of surge phenomena and maintain the stable operation of the compressor.

[0065] The anti-surge control method of the compressor in the embodiments of the present application has been described in detail above. Next, the anti-surge control device and the compressor in the embodiments of the present application will be described in detail. The anti-surge control device and the compressor in the embodiments of the present application can be used to implement the corresponding methods in the embodiments of the present application. For the details not disclosed in detail in the device embodiments of the present application, reference can be made to the corresponding descriptions in the method embodiments of the present application, and details will not be repeated here.

[0066] Figure 3 It is a partial exemplary structural diagram of a compressor system including an anti-surge control device in the embodiments of the present application. As Figure 3 shown, the compressor system may include: a gas volume regulation system 31, a pressure measurement system 32, an anti-surge control device 33, and a compressor (i.e., the compressor body) 1. Here, the gas volume regulation system 31, the pressure measurement system 32, and the anti-surge control device 33 may constitute the anti-surge control system in the embodiments of the present application.

[0067] Among them, the gas volume regulation system 31 may include: an inlet control valve 311 and an outlet control valve 312. Among them, the inlet control valve 311 is arranged on the gas inlet 11 side of the compressor 1, and is used to control the gas volume entering the compressor 1 by adjusting its own opening degree. The outlet control valve 312 is arranged on the gas outlet 12 side of the compressor 1 (i.e., on the side of the process gas generated after compression), and is used to control the outlet gas volume of the compressor 1 by adjusting its own opening degree.

[0068] The pressure measurement system 32 may include: an inlet pressure measurement module 321 and an outlet pressure measurement module 322. Among them, the inlet pressure measurement module 321 is arranged on the gas inlet 11 side of the compressor 1, and is used to measure the current inlet pressure of the compressor 1. The outlet pressure measurement module 322 is arranged on the gas outlet 12 side of the compressor 1, and is used to measure the current outlet pressure of the compressor 1.

[0069] The anti-surge control device 33 can be used to obtain the current inlet pressure and the current outlet pressure, and calculate the current pressure difference between the inlet and outlet of the compressor based on the current inlet pressure and the current outlet pressure; compare the current pressure difference with a set pressure difference threshold, and obtain a regulation parameter based on the comparison result; determine the current control interval from a pre-determined split-range control model based on the regulation parameter; and control the opening degree of at least one of the inlet control valve and the outlet control valve based on the current control interval. Among them, the regulation parameter is used to make the pressure difference between the inlet and outlet of the compressor tend to the set pressure difference threshold.

[0070] In an example, the anti-surge control device 33 may include: a pressure difference calculation module 331 and a pressure difference control module 332.

[0071] Among them, the differential pressure calculation module 331 is used to obtain the current inlet pressure and the current outlet pressure, and calculate the current pressure difference between the inlet and outlet of the compressor based on the current inlet pressure and the current outlet pressure.

[0072] The differential pressure control module 332 is used to compare the current pressure difference with a set pressure difference threshold, obtain a regulation parameter based on the comparison result, determine the current control interval from the set split-range control model based on the regulation parameter, and send a signal for opening degree control to at least one of the inlet control valve and the outlet control valve based on the current control interval.

[0073] In one embodiment, the control module 332 can compare the current pressure difference with the set pressure difference threshold based on the PID control algorithm, and obtain the regulation parameter based on the comparison result.

[0074] In one embodiment, the set pressure difference threshold can be: a pressure difference range or a pressure difference value preset according to process requirements and the operating conditions of the compressor.

[0075] In one embodiment, the pre-determined split-range control model can be: the current split-range control model pre-selected from multiple split-range control models according to process requirements and the operating conditions of the compressor.

[0076] Among them, the multiple split-range control models may include at least one of the split-range control models as shown in Figures 2A to 2E the split-range control model shown in

[0077] In addition, in this embodiment, the compressor system may further include a tail vent valve 13, as well as an inlet main valve 14 and an outlet main valve 15. Among them, the tail vent valve 13 is used to discharge excess gas. The inlet main valve 14 is used to adjust the intake passage of the compressor 1 to a first set opening amount according to process requirements, and the outlet main valve 15 is used to adjust the outlet passage of the compressor 1 to a second set opening amount according to process requirements.

[0078] In this embodiment, the inlet main valve 14 and the outlet main valve 15 can be understood as valves for controlling the total inlet and outlet gas volumes based on initial settings; the inlet control valve 311 and the outlet control valve 312 can be understood as valves for dynamically adjusting the inlet and outlet gas volumes based on the real-time pressure difference values at the inlet and outlet.

[0079] In fact, the compressor anti-surge control device provided by this embodiment of the present application can be specifically implemented in various ways. For example, it can be compiled into a plug-in installed in a smart terminal by using an application programming interface that conforms to specific rules, or can be encapsulated into an application program to form a program product for users to download and use.

[0080] When compiled into a plug-in, the compressor surge control device can be implemented in various plug-in forms, such as ocx, dll, and cab. The compressor surge control device provided by this implementation manner of the present application can also be implemented by using specific technologies, such as Flash plug-in technology, RealPlayer plug-in technology, MMS plug-in technology, MIDI personnel plug-in technology, or ActiveX plug-in technology.

[0081] The modules in the above embodiments can be software modules implemented in a computer or hardware modules, and the hardware modules can be implemented mechanically or electronically. For example, a hardware module can include a specially designed permanent circuit or logic device (such as a dedicated processor, such as an FPGA or an ASIC) for performing specific operations. The hardware module can also include a programmable logic device or circuit temporarily configured by software (such as including a general-purpose processor or other programmable processors) for executing specific operations. As for whether to specifically adopt a mechanical manner, a dedicated permanent circuit, or a temporarily configured circuit (such as configured by software) to implement the hardware module, it can be determined according to cost and time considerations.

[0082] The surge control method of the compressor provided in the embodiments of the present application can be encapsulated into an application program in the form of instructions or an instruction set to form a program product for users to download and use; or, it can be stored in various storage media in the form of instruction storage or instruction set storage.

[0083] In addition, an embodiment of the present application also provides a computer program product, including a computer program that can be executed by a processor to implement the surge control method of the compressor described in the embodiments of the present application. An embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored, and the computer program can be executed by a processor to implement the surge control method of the compressor described in the embodiments of the present application. Specifically, a system or device equipped with a storage medium can be provided, on which software program code for implementing the functions of any one of the above embodiments is stored, and the computer (or CPU or MPU) of the system or device is made to read and execute the program code stored in the storage medium. In addition, some or all of the actual operations can also be completed by an operating system operating on the computer based on the instructions of the program code. The program code read from the storage medium can also be written into the memory provided in the expansion board inserted into the computer or into the memory provided in the expansion unit connected to the computer, and then based on the instructions of the program code, the CPU etc. installed on the expansion board or the expansion unit are made to execute some and all of the actual operations, thereby implementing the functions of any one of the above embodiments. Embodiments of the storage medium for providing the program code include but are not limited to: floppy disks, optical discs, DVDs, hard disks, flash memories, USB flash drives, CF cards, SD cards, SDHC cards, MMC cards, SM cards, memory sticks, xD cards, non-volatile memory cards, and ROMs, etc.

[0084] It should be clear that the operating system operating on the computer can implement some or all of the actual operations not only by executing the program code read by the computer from the storage medium, but also by using the instructions based on the program code to implement the functions of any embodiment in the above embodiments.

[0085] For example, Figure 4 is an exemplary structural diagram of another surge control device for a compressor in an embodiment of the present application. This device can be used to execute Figure 1 the method shown, or to implement Figure 3 the device in Figure 4 As shown in

[0086] At least one memory 401 is used to store a computer program. In one example, the computer program can be understood to include Figure 3Various modules of the device shown. Additionally, at least one memory 401 can store an operating system, etc. The operating system includes but is not limited to: Android operating system, Symbian operating system, Windows operating system, Linux operating system, etc.

[0087] At least one processor 402 is used to call a computer program stored in at least one memory 401 to execute the surge control method of the compressor described in the embodiments of the present application. The processor 402 can be a CPU, a processing unit / module, an ASIC, a logic module, or a programmable gate array, etc., and it can receive and send data through a communication port.

[0088] Figure 5 It is a schematic flow diagram of the working process of the compressor in an example of the present application. In this example, an inlet pressure measurement module and an inlet regulating valve are provided on the gas inlet side of the compressor, and an outlet pressure measurement module and an outlet regulating valve are provided on the gas outlet side of the compressor. As Figure 5 shown, the working process may include the following steps:

[0089] Step S51, determine whether the startup conditions of the compressor auxiliary are met? If yes, then execute step S52.

[0090] Before starting the air compressor, a comprehensive inspection is an important step to ensure the safe operation of the equipment. This includes checking whether all relevant parameters (such as voltage, current, oil temperature, oil pressure, cooling water flow, etc.) meet the recommended values or adjustment requirements of the equipment manufacturer. The correctness of these parameters is crucial for avoiding equipment damage and ensuring equipment performance. Among them, the normal startup of the auxiliary (such as lubricating oil pump, cooling fan, etc.) is a prerequisite for the smooth startup of the main engine. Therefore, in this example, the situation of the auxiliary can be checked first. The auxiliary is responsible for providing necessary operating conditions for the main engine, such as lubrication and cooling.

[0091] Step S52, start the compressor auxiliary system.

[0092] Step S53, determine whether the compressor auxiliary is running normally and whether the startup conditions of the compressor main engine are met? If yes, then execute step S54.

[0093] Step S54, start the compressor main engine system.

[0094] When the auxiliary is running normally and the main engine meets the startup conditions (such as reaching a certain oil temperature, oil pressure, etc.), the main engine starts. The startup process of the main engine needs to be carried out smoothly to avoid excessive impact on the equipment.

[0095] Step S55, determine whether the compressor main engine is running normally and meets the process indicators? If yes, then execute step S56.

[0096] Step S56, start the compressor surge prevention control system in the embodiment of the present application.

[0097] Under the normal operating conditions of the main machine, the air compressor can operate normally according to the set load. At this time, the operator can adjust the set value of the differential pressure control module according to the actual on-site process conditions. The differential pressure control module controls the opening degree of the outlet regulating valve and / or the inlet regulating valve by monitoring the pressure difference between the inlet and outlet of the compressor, so as to achieve the dynamic balance of the volume at the inlet and outlet of the air compressor. This dynamic balance helps to maintain the stable operation and high energy efficiency of the compressor.

[0098] In this embodiment, in addition to the differential pressure-based surge prevention control system provided in the embodiment of the present application, if there is also a surge prevention control system with a higher safety indication in the original compressor system, such as a surge prevention master control system, the surge prevention master control system can also be retained. Or, if there is no other surge prevention control system in the original compressor system, a surge prevention control system with a higher safety indication, such as a surge prevention master control system, can also be additionally loaded. Among them, the surge prevention master control system can be started when powered on, and can predict the occurrence of surge phenomenon in advance by monitoring the change trend of the compressor operating parameters (including differential pressure), and take corresponding control measures (such as adjusting the load, opening the reflux valve, etc.) to avoid the occurrence of surge. In addition, when it is determined that the compressor shutdown signal is triggered in any step, only the surge prevention master control system can be started, and the compressor surge prevention control system in the embodiment of the present application can be stopped. That is to say, at this time, the compressor surge prevention control system in the embodiment of the present application can be used as a further supplement to the above-mentioned surge prevention master control system to further optimize the compressor surge prevention control.

[0099] It should be understood that the "and / or" used herein is intended to include any and all possible combinations of one or more of the associated listed items.

[0100] It should be noted that not all steps and modules in the above processes and structure diagrams are necessary, and some steps or modules can be ignored according to actual needs. The execution order of each step is not fixed and can be adjusted according to needs. The division of each module is only for the convenience of describing the functional division adopted. In actual implementation, one module can be implemented by multiple modules, and the functions of multiple modules can also be implemented by the same module. These modules can be located in the same device or in different devices.

[0101] The number of embodiments of the present application is only for description and does not represent the advantages of the embodiments.

[0102] As can be seen from the above solution, in the embodiment of the present application, since an inlet pressure measurement module and an inlet regulating valve are provided on the gas inlet side of the compressor, and an outlet pressure measurement module and an outlet regulating valve are provided on the gas outlet side of the compressor, and the opening degree of the regulating valve is controlled by calculating the pressure difference between the inlet and outlet of the compressor to adjust the volume ratio between the inlet and outlet of the compressor, thereby changing the operating condition point of the compressor and making it away from the surge region, effectively reducing the risk of compressor surge. In addition, it also has the following beneficial effects:

[0103] Improve stability: By precisely controlling the pressure difference, unstable factors during the operation of the compressor can be reduced, and the overall stability and reliability of the system can be improved.

[0104] Reduce shutdown losses: Reduce abnormal shutdowns caused by surges and reduce the negative impact on production processes and materials.

[0105] Prolong the equipment life: Avoid the impact and wear of surges on the mechanical components of the compressor and prolong the service life of the equipment.

[0106] Improve energy efficiency: By optimizing gas flow and pressure control, the energy efficiency and operating efficiency of the compressor are improved.

[0107] In this patent application, nouns and pronouns related to people are not limited to a specific gender.

[0108] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for controlling surge prevention of a compressor, characterized in that: The gas inlet side of the compressor is provided with an inlet pressure measuring module and an inlet regulating valve, and the gas outlet side of the compressor is provided with an outlet pressure measuring module and an outlet regulating valve; the method comprises: Acquiring the current inlet pressure of the compressor measured by the inlet pressure measuring module and the current outlet pressure of the compressor measured by the outlet pressure measuring module (S11); Based on the current inlet pressure and the current outlet pressure, a current pressure difference between the inlet and outlet of the compressor is calculated (S12); Comparing the current pressure difference with a set pressure difference threshold, and obtaining a control parameter based on the comparison result (S13); Based on the control parameters, determining a current control interval from a predetermined step control model (S14); Based on the current control interval, the opening degree of at least one of the inlet regulating valve and the outlet regulating valve is controlled ( S15 ).

2. The anti-surge control method for a compressor according to claim 1, characterized in that: The set pressure difference threshold is: a pressure difference range or a pressure difference value that is preset according to process requirements and the operating status of the compressor.

3. The anti-surge control method for a compressor according to claim 1, characterized in that: The predetermined split-range control model is: a current split-range control model selected in advance from a plurality of split-range control models according to process requirements and the operating conditions of the compressor.

4. The anti-surge control method for a compressor according to claim 3, characterized in that: The multiple split-range control models include at least one of the following split-range control models: A first split-range control model (C1), comprising a first control interval (C11) and a second control interval (C12) adjacent to each other, wherein the first control interval (C11) corresponds to a control curve of the opening of the inlet regulating valve from maximum to minimum, and the second control interval (C12) corresponds to a control curve of the opening of the outlet regulating valve from minimum to maximum; a second split-range control model (C2), comprising a third control interval (C21) and a fourth control interval (C22) adjacent to each other, wherein the third control interval (C21) corresponds to a control curve of the opening of the inlet regulating valve from maximum to minimum, and the fourth control interval (C22) corresponds to a control curve of the opening of the outlet regulating valve from maximum to minimum; a third split-range control model (C3), comprising a fifth control interval (C31) and a sixth control interval (C32) adjacent to each other, wherein the fifth control interval (C31) corresponds to a control curve of the opening of the inlet regulating valve from minimum to maximum, and the sixth control interval (C32) corresponds to a control curve of the opening of the outlet regulating valve from minimum to maximum; a fourth split-range control model (C4), comprising a seventh control interval (C41) and an eighth control interval (C42) adjacent to each other, wherein the seventh control interval (C41) corresponds to a control curve of the opening of the inlet regulating valve from minimum to maximum, and the eighth control interval (C42) corresponds to a control curve of the opening of the outlet regulating valve from maximum to minimum; The fifth split-range control model (C5) includes a ninth control interval (C51), wherein the ninth control interval (C51) corresponds to a control curve in which the opening of the inlet regulating valve is from maximum to minimum and the opening of the outlet regulating valve is from minimum to maximum.

5. The anti-surge control method for a compressor according to any one of claims 1 to 4, characterized in that: The comparing the current pressure difference with a set pressure difference threshold and obtaining a control parameter based on the comparison result includes: The current pressure difference is compared with a set pressure difference threshold based on a proportional-integral-differential (PID) control algorithm, and a control parameter is obtained based on the comparison result.

6. The anti-surge control device of the compressor is characterized in that: The gas inlet (11) side of the compressor is provided with an inlet pressure measuring module (321) and an inlet regulating valve (311), and the gas outlet (12) side of the compressor is provided with an outlet pressure measuring module (322) and an outlet regulating valve (312); the device comprises: a pressure difference calculation module (331), used to obtain the current inlet pressure of the compressor measured by the inlet pressure measurement module (321) and the current outlet pressure of the compressor measured by the outlet pressure measurement module (322), and calculate the current pressure difference between the inlet and outlet of the compressor based on the current inlet pressure and the current outlet pressure; and The pressure difference control module (332) is used to compare the current pressure difference with a set pressure difference threshold, and obtain a control parameter based on the comparison result, and determine the current control interval from the set split-range control model based on the control parameter, and send a signal for opening control to at least one of the inlet control valve (311) and the outlet control valve (312) based on the current control interval.

7. The anti-surge control device of the compressor is characterized in that: An inlet pressure measuring module (321) and an inlet regulating valve (311) are provided on the gas inlet (11) side of the compressor, and an outlet pressure measuring module (322) and an outlet regulating valve (312) are provided on the gas outlet (12) side of the compressor; the device comprises: at least one memory (401) and at least one processor (402), wherein: The at least one memory (401) is used to store a computer program; The at least one processor (402) is used to call the computer program stored in the at least one memory (401) to execute the anti-surge control method for the compressor according to any one of claims 1 to 5.

8. A compressor system, characterized in that include: A gas volume regulating system (31), a pressure measuring system (32) and an anti-surge control device (33) as claimed in claim 6 or 7; wherein: The gas volume regulating system (31) comprises: an inlet regulating valve (311) arranged on the gas inlet (11) side of the compressor, and used to control the gas volume entering the compressor by adjusting its own opening; and an outlet regulating valve (312) arranged on the gas outlet (12) side of the compressor, and used to control the gas volume at the outlet of the compressor by adjusting its own opening; The pressure measurement system (32) comprises: an inlet pressure measurement module (321), which is arranged on the gas inlet (11) side of the compressor and is used to measure the current inlet pressure of the compressor; and an outlet pressure measurement module (322), which is arranged on the gas outlet (12) side of the compressor and is used to measure the current outlet pressure of the compressor.

9. A computer-readable storage medium having a computer program stored thereon; characterized in that: The computer program can be executed by a processor and implements the anti-surge control method for a compressor according to any one of claims 1 to 5.

10. A computer program product comprising a computer program; characterized in that The computer program can be executed by a processor and implements the anti-surge control method for a compressor according to any one of claims 1 to 5.

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