CN117970970A - Vpsa mode-based oxygen-making oil-free compressor and control system thereof - Google Patents
Vpsa mode-based oxygen-making oil-free compressor and control system thereof Download PDFInfo
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 195
- 239000001301 oxygen Substances 0.000 claims abstract description 195
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 195
- 238000004519 manufacturing process Methods 0.000 claims abstract description 52
- 238000003860 storage Methods 0.000 claims abstract description 28
- 238000001179 sorption measurement Methods 0.000 claims abstract description 25
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 239000003463 adsorbent Substances 0.000 claims abstract description 5
- 230000033228 biological regulation Effects 0.000 claims description 50
- 238000004364 calculation method Methods 0.000 claims description 36
- 238000012545 processing Methods 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 22
- 238000005265 energy consumption Methods 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 16
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 7
- 238000004886 process control Methods 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 24
- 230000009286 beneficial effect Effects 0.000 description 7
- 238000004422 calculation algorithm Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The invention relates to the technical field of oxygen production systems, and provides an oxygen production oil-free compressor based on vpsa modes and a control system thereof, wherein the oxygen production oil-free compressor comprises an air pretreatment terminal, an oil-free compressor terminal, an adsorption terminal, an oxygen storage terminal, a control terminal and an oxygen output terminal; the air pretreatment terminal is used for filtering and purifying air entering the system; the oil-free compressor terminal is used for providing gas pressure and conveying the pretreated air to the adsorption terminal; the adsorption terminal is used for separating oxygen from air through the adsorbent and conveying the oxygen to the oxygen storage terminal; the oxygen storage terminal is used for storing the prepared oxygen according to the target pressure value; the control terminal is used for monitoring and adjusting control parameters related to the oxygen production process; the oxygen output terminal is used for outputting oxygen out of the system according to the requirements of a user. The invention has the effect of improving the oxygen production efficiency of the oxygen production system.
Description
Technical Field
The invention relates to the technical field of oxygen production systems, in particular to an oxygen production oil-free compressor based on vpsa mode and a control system thereof.
Background
VPSA technology (Vacuum Pressure Swing Adsorption) is a technology for separating gases suitable for extracting oxygen from air. It uses the principle that the adsorption capacity of the adsorbent to gas is different under different pressures to separate the gas. An oxygen-producing oil-free compressor is a compressor used in the oxygen production process, and oil is not used as a lubricating or sealing medium in the operation process.
A number of oxygen generating systems have been developed and, through extensive searching and reference, the prior art oxygen generating systems have been found to have oxygen generating systems as disclosed in publication nos. CN116044707A, CN107670152A, CN114876760A, EP0232426A1, US20100071698A1, JP2017223416a, which generally include: an air intake terminal, an oxygen generation terminal, and an oxygen storage terminal; the air suction terminal is used for sucking air and preprocessing the air; the oxygen generating terminal is used for extracting oxygen from the sucked air; the oxygen storage terminal is used for storing the prepared oxygen. The oxygen generation control process of the oxygen generation system is single, so that the high-efficiency oxygen generation work is not facilitated, and the defect of reduced oxygen generation efficiency of the oxygen generation system is caused.
Disclosure of Invention
The invention aims to provide an oxygen-making oil-free compressor based on vpsa mode and a control system thereof, aiming at the defects of the oxygen-making system.
The invention adopts the following technical scheme:
An oxygen-making oil-free compressor based on vpsa mode comprises an air pretreatment terminal, an oil-free compressor terminal, an adsorption terminal, an oxygen storage terminal, a control terminal and an oxygen output terminal; the air pretreatment terminal is used for filtering and purifying air entering the system; the oil-free compressor terminal is used for providing gas pressure and conveying pretreated air to the adsorption terminal; the adsorption terminal is used for separating oxygen from air through an adsorbent and conveying the oxygen to the oxygen storage terminal; the oxygen storage terminal is used for storing the prepared oxygen according to the target pressure value; the control terminal is used for monitoring and adjusting control parameters related to the oxygen production process; the oxygen output terminal is used for outputting oxygen out of the system according to the requirements of a user;
the air pretreatment terminal comprises a filtering module and a purifying module; the filter module is used for filtering air entering the system to remove dust and moisture in the air; the purification module is used for purifying the air after filtering and removing grease in the air.
Optionally, the control terminal comprises an energy efficiency regulation module and a working process control module; the energy efficiency regulation and control module is used for calculating the energy efficiency in real time and generating a corresponding energy efficiency regulation and control instruction according to a calculation result; the working process control module is used for controlling the air pretreatment terminal, the oil-free compressor terminal, the adsorption terminal, the oxygen storage terminal and the oxygen output terminal to complete the working process of oxygen production according to the energy efficiency regulation and control instruction and the working instruction input by a user.
Optionally, the energy efficiency regulation and control module comprises an energy efficiency calculation sub-module and an energy efficiency regulation and control instruction generation sub-module; the energy efficiency calculation submodule is used for calculating energy efficiency according to the oxygen amount of the oxygen storage terminal and the oxygen production energy consumption; the energy efficiency regulation instruction generation sub-module is used for generating corresponding energy efficiency regulation instructions according to energy efficiency;
When the energy efficiency calculation submodule works, the following equation is satisfied:
；
；
Wherein, efficiency energy represents energy efficiency; representing a multiple selection function based on the number of years of use versus the fault difference value; y represents the service years of the oxygen-making oil-free compressor; t 1 and t 2 respectively represent a standard value of the number of faults and the actual number of faults of the oxygen-making oil-free compressor; beta represents a proportional threshold value, which is empirically set by an administrator; o a represents the oxygen amount value produced by the oxygen-making oil-free compressor in the a working period; a represents the total number of working cycles of the same day; c a represents the electric energy consumption value consumed by the oxygen-making oil-free compressor in the a-th working period;
When (when) When the energy efficiency regulation instruction generation submodule generates an energy efficiency regulation instruction for regulating the oxygen amount or reducing the electric energy consumption; e ref represents an energy efficiency standard value, which is empirically set by an administrator;
For example: the service years of the oxygen-making oil-free compressor is 2 years, the standard value of the fault times is 2, the actual fault times is 1, E ref is 2, beta is 2, the total number of the working periods of the same day is 2, each working period is 1 hour, the first working period generates 200m of oxygen, the oxygen quantity is 200, the electric energy consumption is 100 kilowatt hours, the electric energy consumption is 100, the second working period generates 180m of oxygen, the oxygen quantity is 180, the electric energy consumption is 100 kilowatt hours, and the electric energy consumption is 100 The energy efficiency regulation instruction generation submodule generates an energy efficiency regulation instruction for regulating oxygen amount or reducing electric energy consumption.
The control system of the oxygen-making oil-free compressor based on vpsa mode is used for controlling the oxygen-making oil-free compressor based on vpsa mode, and comprises a live data acquisition terminal, a live data processing terminal and an oxygen-making process regulation terminal; the live data acquisition terminal is used for acquiring live data from the air pretreatment terminal, the oil-free compressor terminal, the adsorption terminal, the oxygen storage terminal and the oxygen output terminal; the live data processing terminal is used for carrying out data processing and analysis on all live data and generating corresponding processing result information; the oxygen production process regulation and control terminal is used for generating corresponding oxygen production process regulation and control instructions according to the processing result information.
Optionally, the live data processing terminal comprises a control signal calculation module and a control signal generation module; the control signal calculation module is used for calculating a control signal according to the actual pressure value and the target pressure value of the oil-free compressor terminal; the control signal generation module is used for generating a control signal according to the calculation result of the control signal calculation module;
when the control signal calculation module works, the following formula is satisfied:
；
；
Wherein u (t) represents a control signal for driving the system to adjust the oxygen pressure of the oxygen output terminal so as to facilitate the stable output of the oxygen by the system; the control signals are used to adjust the operation of the system to reduce errors, which may be, but is not limited to: adjusting the rotation speed of the oil-free compressor terminal, the opening and closing positions of the valves and the like to maintain the pressure level required by the oxygen of the oxygen output terminal; in general, the control signal in the present application is used to adjust the rotational speed of the oil-free compressor terminals; k p、Ki、Kd and K t represent a proportional gain coefficient, an integral gain coefficient, a differential gain coefficient, and a time-lag gain coefficient, respectively; e (t) represents the difference between the target value and the actual value of the oxygen pressure of the oxygen output terminal at the time t; Representing an integral term for e (t); /(I) Representing a derivative term to e (t); /(I)Representing a time-lag function; /(I)Representing the difference between the target value and the actual value of the oxygen pressure at the oxygen output terminal at time t-deltat. Assuming a target pressure of 10 bar, the current actual oxygen pressure at the oxygen delivery terminal is 9.8 bar, there is an error of 0.2 bar, and based on this error and the accumulation and rate of change of the error over time, a control signal output value u (t) is calculated that will be used to increase the speed of the oil free compressor terminal to increase the pressure of oxygen at the oxygen delivery terminal, with the increase in pressure, the error decreases and the control signal adjusts accordingly until the system stabilizes at the target pressure. By this closed loop control mechanism, the oxygen-producing oilless compressor can accurately maintain a desired pressure level, ensuring the quality of oxygen and the continuity of supply.
The control method of the oxygen-making oil-free compressor based on vpsa mode is applied to the control system of the oxygen-making oil-free compressor based on vpsa mode, and comprises the following steps:
S1, acquiring live data from the air pretreatment terminal, the oil-free compressor terminal, the adsorption terminal, the oxygen storage terminal and the oxygen output terminal;
S2, carrying out data processing and analysis on all live data to generate corresponding processing result information;
S3, generating a corresponding oxygen production process regulation instruction according to the processing result information.
The beneficial effects obtained by the invention are as follows:
1. The air pretreatment terminal, the oil-free compressor terminal, the adsorption terminal, the oxygen storage terminal, the control terminal and the oxygen output terminal are arranged to be beneficial to optimizing the process of oxygen production work, enrich the oxygen production control process and further be beneficial to improving the oxygen production efficiency of the oxygen production system;
2. the arrangement of the filtering module and the purifying module is beneficial to more rapidly completing pretreatment of the sucked air, thereby being beneficial to improving the oxygen production efficiency;
3. the energy efficiency regulation and control module and the working process control module are arranged to facilitate the further enrichment of the control process through energy efficiency regulation and control, realize the further optimization of the oxygen production process through energy efficiency regulation and control, and improve the energy efficiency and the oxygen production efficiency;
4. The energy efficiency computing sub-module and the energy efficiency regulating instruction generating sub-module are arranged in cooperation with an energy efficiency computing algorithm, so that the computing accuracy and computing speed of the energy efficiency are improved, the system is facilitated to quickly and efficiently regulate the energy efficiency, the oxygen production process is more efficient, and the oxygen production efficiency of the oxygen production system is facilitated to be improved;
5. The control system of the oxygen-making oil-free compressor comprises a live data acquisition terminal, a live data processing terminal and an oxygen-making process regulation terminal, which is beneficial to acquiring the live data of the oxygen-making system more quickly, further optimizing the control process and further improving the oxygen-making efficiency and quality of the oxygen-making system;
6. The control signal calculation module and the control signal generation module are matched with a control signal calculation algorithm, so that the accuracy and timeliness of control signal output are improved, the quality and efficiency of an oxygen production process are improved, and the oxygen production efficiency of an oxygen production system is improved;
7. The arrangement of the maintenance prompt index calculation sub-module and the real-time maintenance prompt information generation sub-module is matched with the maintenance prompt index algorithm, so that the accuracy and the generation efficiency of the real-time maintenance prompt information are improved, the stability of the oxygen generation system is improved, and the oxygen generation efficiency of the oxygen generation system is further improved.
For a further understanding of the nature and the technical aspects of the present invention, reference should be made to the following detailed description of the invention and the accompanying drawings, which are provided for purposes of reference only and are not intended to limit the invention.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the reinforcement sleeve and control assembly of the present invention;
FIG. 3 is a schematic view of a contact point coordinate system of the present invention;
FIG. 4 is a flow chart of a rehabilitation method according to the present invention;
fig. 5 is a schematic view showing a connection structure of the grip sleeve and the stabilizer of the present invention.
Detailed Description
The following embodiments of the present invention are described in terms of specific examples, and those skilled in the art will appreciate the advantages and effects of the present invention from the disclosure herein. The invention is capable of other and different embodiments and its several details are capable of modification and variation in various respects, all without departing from the spirit of the present invention. The drawings of the present invention are merely schematic illustrations, and are not drawn to actual dimensions, and are stated in advance. The following embodiments will further illustrate the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.
Embodiment one: the embodiment provides an oxygen-making oil-free compressor based on vpsa mode. Referring to fig. 1, an oxygen-making oil-free compressor based on vpsa mode comprises an air pretreatment terminal, an oil-free compressor terminal, an adsorption terminal, an oxygen storage terminal, a control terminal and an oxygen output terminal; the air pretreatment terminal is used for filtering and purifying air entering the system; the oil-free compressor terminal is used for providing gas pressure and conveying the air after passing through the air pretreatment terminal to the adsorption terminal; the adsorption terminal is used for separating oxygen from air through an adsorbent and conveying the oxygen to the oxygen storage terminal; the oxygen storage terminal is used for storing the prepared oxygen according to the target pressure value; the control terminal is used for monitoring and adjusting control parameters related to the oxygen production process; the oxygen output terminal is used for outputting oxygen out of the system according to the requirements of a user;
the air pretreatment terminal comprises a filtering module and a purifying module; the filter module is used for filtering air entering the system to remove dust and moisture in the air; the purification module is used for purifying the air after filtering and removing grease in the air.
Optionally, the control terminal comprises an energy efficiency regulation module and a working process control module; the energy efficiency regulation and control module is used for calculating the energy efficiency in real time and generating a corresponding energy efficiency regulation and control instruction according to a calculation result; the working process control module is used for controlling the air pretreatment terminal, the oil-free compressor terminal, the adsorption terminal, the oxygen storage terminal and the oxygen output terminal to complete the working process of oxygen production according to the energy efficiency regulation and control instruction and the working instruction input by a user.
Optionally, referring to fig. 2, the energy efficiency regulation module includes an energy efficiency calculation sub-module and an energy efficiency regulation instruction generation sub-module; the energy efficiency calculation submodule is used for calculating energy efficiency according to the oxygen amount of the oxygen storage terminal and the oxygen production energy consumption; the energy efficiency regulation instruction generation sub-module is used for generating corresponding energy efficiency regulation instructions according to energy efficiency;
When the energy efficiency calculation submodule works, the following equation is satisfied:
；
；
Wherein, efficiency energy represents energy efficiency; representing a multiple selection function based on the number of years of use versus the fault difference value; y represents the service years of the oxygen-making oil-free compressor; t 1 and t 2 respectively represent a standard value of the number of faults and the actual number of faults of the oxygen-making oil-free compressor; beta represents a proportional threshold value, which is empirically set by an administrator; o a represents the oxygen amount value produced by the oxygen-making oil-free compressor in the a working period; a represents the total number of working cycles of the same day; c a represents the electric energy consumption value consumed by the oxygen-making oil-free compressor in the a-th working period;
When (when) When the energy efficiency regulation instruction generation submodule generates an energy efficiency regulation instruction for regulating and improving the energy efficiency; the energy efficiency can be increased by making the numerator or denominator in the energy efficiency formula bigger or smaller, namely, the energy efficiency is increased by: increasing the amount of oxygen or reducing the consumption of electrical energy, for example, may be: 1. updating the cleanliness of the oxygen production hardware, namely cleaning the oxygen production hardware, wherein the higher the cleanliness is, the better the oxygen production hardware is, the electricity is saved, and the oxygen amount is increased; 2. the working process and time of oxygen production are optimized, namely: the cooperation of hardware in the oxygen production work is more reasonable; 3. using new or better oxygen-generating consumables; 4. the oxygen generating hardware oxygen generating equipment moves to a cleaner and more open environment and is more suitable for the environment; the reduction of the power consumption may be: 1. periodically maintaining oxygen generating equipment, cleaning the surface of the equipment, replacing ageing parts and ageing sealing elements; 2. the mode of recovering waste heat is used for preheating air, so that the utilization rate of electric energy is improved, and the energy consumption is further reduced; 3. the motor in the oxygen generating equipment works in cooperation with the frequency conversion module so as to adjust the rotating speed of the motor according to actual demands, thereby avoiding the motor from running under full load and reducing the electric energy consumption. The mode of specifically increasing the energy efficiency is selected by an administrator according to actual requirements; e ref represents an energy efficiency standard value, which is empirically set by an administrator;
For example: the service years of the oxygen-making oil-free compressor is 2 years, the standard value of the fault times is 2, the actual fault times is 1, E ref is 2, beta is 2, the total number of the working periods of the same day is 2, each working period is 1 hour, the first working period generates 200m of oxygen, the oxygen quantity is 200, the electric energy consumption is 100 kilowatt hours, the electric energy consumption is 100, the second working period generates 180m of oxygen, the oxygen quantity is 180, the electric energy consumption is 100 kilowatt hours, and the electric energy consumption is 100 The energy efficiency regulation instruction generation submodule generates an energy efficiency regulation instruction for regulating oxygen amount or reducing electric energy consumption.
Referring to fig. 3, a control system of an oxygen-making oil-free compressor based on vpsa mode is used for controlling the oxygen-making oil-free compressor based on vpsa mode, and the control system of the oxygen-making oil-free compressor comprises a live data acquisition terminal, a live data processing terminal and an oxygen-making process regulation terminal; the live data acquisition terminal is used for acquiring live data from the air pretreatment terminal, the oil-free compressor terminal, the adsorption terminal, the oxygen storage terminal and the oxygen output terminal; the live data processing terminal is used for carrying out data processing and analysis on all live data and generating corresponding processing result information; the oxygen production process regulation and control terminal is used for generating corresponding oxygen production process regulation and control instructions according to the processing result information.
Optionally, the live data processing terminal comprises a control signal calculation module and a control signal generation module; the control signal calculation module is used for calculating a control signal according to the actual pressure value and the target pressure value of the oil-free compressor terminal; the control signal generation module is used for generating a control signal according to the calculation result of the control signal calculation module;
when the control signal calculation module works, the following formula is satisfied:
；
；
Wherein u (t) represents a control signal for driving the system to adjust the oxygen pressure of the oxygen output terminal so as to facilitate the stable output of the oxygen by the system; the control signals are used to adjust the operation of the system to reduce errors, which may be, but is not limited to: adjusting the rotation speed of the oil-free compressor terminal, the opening and closing positions of the valves and the like to maintain the pressure level required by the oxygen of the oxygen output terminal; in general, the control signal in the present application is used to adjust the rotational speed of the oil-free compressor terminals; k p、Ki、Kd and K t represent a proportional gain coefficient, an integral gain coefficient, a differential gain coefficient, and a time-lag gain coefficient, respectively; k p、Ki、Kd and K t may be, but are not limited to, obtained by: a manual adjustment mode and an adaptive adjustment mode; the manual adjustment mode is to manually adjust the values of K p、Ki、Kd and K t to observe the response of the system, wherein the steps are to gradually increase or decrease the parameters from small values, observe the stability, overshoot and oscillation conditions of the system, and find the optimal parameter combination; the self-adaptive adjustment mode means that the control signal calculation module has a parameter adjustment function, and K p、Ki、Kd and K t are directly adjusted according to real-time performance; generally, in a stable system, K p is set to 2,K i to 0.1, K d to 1, and K t to 0.2; e (t) represents the difference between the target value and the actual value of the oxygen pressure of the oxygen output terminal at the time t; Representing integral terms, namely: accumulating all differences from time 0 to time t; /(I) Representing the differential term, namely: the rate of change of the error value over time, the slope of the error value; /(I)Representing a time-lag function; /(I)Representing the difference between the target value and the actual value of the oxygen pressure at the oxygen output terminal at time t-deltat. Assuming a target pressure of 10 bar, the current actual oxygen pressure at the oxygen delivery terminal is 9.8 bar, there is an error of 0.2 bar, and based on this error and the accumulation and rate of change of the error over time, a control signal output value u (t) is calculated that will be used to increase the speed of the oil free compressor terminal to increase the pressure of oxygen at the oxygen delivery terminal, with the increase in pressure, the error decreases and the control signal adjusts accordingly until the system stabilizes at the target pressure. By this closed loop control mechanism, the oxygen-producing oilless compressor can accurately maintain a desired pressure level, ensuring the quality of oxygen and the continuity of supply.
The control method of the oxygen-making oil-free compressor based on vpsa mode is applied to the control system of the oxygen-making oil-free compressor based on vpsa mode, and is shown in combination with fig. 4, and the control method of the oxygen-making oil-free compressor comprises the following steps:
S1, acquiring live data from the air pretreatment terminal, the oil-free compressor terminal, the adsorption terminal, the oxygen storage terminal and the oxygen output terminal;
S2, carrying out data processing and analysis on all live data to generate corresponding processing result information;
S3, generating a corresponding oxygen production process regulation instruction according to the processing result information.
The arrangement of the air pretreatment terminal, the oil-free compressor terminal, the adsorption terminal, the oxygen storage terminal, the control terminal and the oxygen output terminal is beneficial to optimizing the oxygen production process, pretreatment of the sucked air is completed more rapidly, the control process is further enriched through energy efficiency regulation, the further optimization of the oxygen production process is realized through energy efficiency regulation, and the oxygen production control process is enriched; the energy efficiency calculation algorithm is matched, so that the calculation accuracy and calculation rate of the energy efficiency are improved, the system is facilitated to quickly and efficiently adjust the energy efficiency, and the oxygen production process is more efficient; the control signal calculation algorithm is matched, so that the accuracy and timeliness of control signal output are improved, the quality and efficiency of an oxygen production process are improved, and the oxygen production efficiency of an oxygen production system is improved.
Embodiment two: the embodiment includes the whole content of the first embodiment, and provides a control system of an oxygen-making oil-free compressor based on vpsa mode, and the live data processing terminal further includes a real-time maintenance prompt module as shown in fig. 5; the real-time maintenance prompt module is used for generating real-time maintenance prompt information according to the live data so as to prompt an administrator to maintain the system in real time in time; the real-time maintenance prompt module comprises a maintenance prompt index calculation sub-module and a real-time maintenance prompt information generation sub-module; the maintenance prompt index calculation sub-module is used for calculating maintenance prompt indexes according to live data; the real-time maintenance prompt information generation sub-module is used for generating corresponding real-time maintenance prompt information according to the maintenance prompt index.
When the maintenance prompt index calculation sub-module works, the following formula is satisfied:
；
wherein, main tenance represents maintenance prompt index based on vpsa mode when the oxygen-making oil-free compressor works; delta 1 and delta 2 respectively represent weight coefficients, each of which is empirically set by an administrator; generally, δ 1 and δ 2 are 2 and 1, respectively; t 1 and T ref respectively represent the total number of changes of the control signal and the reference number of changes in the monitoring period of the oxygen-making oil-free compressor during operation; w 1 and W ref respectively represent the working temperature value and the working temperature standard value of the oxygen-making oil-free compressor in a monitoring period during the working period; both the reference number and the operating temperature standard value are empirically set by an administrator. When (when) And the real-time maintenance prompt information generation sub-module generates real-time maintenance prompt information for prompting an administrator.
The maintenance prompt index calculation sub-module and the real-time maintenance prompt information generation sub-module are matched with a maintenance prompt index algorithm, so that the accuracy and the generation efficiency of the real-time maintenance prompt information are improved, the stability of the oxygen generation system is improved, and the oxygen generation efficiency of the oxygen generation system is further improved.
The foregoing disclosure is only a preferred embodiment of the present invention and is not intended to limit the scope of the invention, so that all equivalent technical changes made by the application of the present invention and the accompanying drawings are included in the scope of the invention, and in addition, the elements in the invention can be updated with the technical development.
Claims (5)
1. The oxygen-making oil-free compressor based on vpsa mode is characterized by comprising an air pretreatment terminal, an oil-free compressor terminal, an adsorption terminal, an oxygen storage terminal, a control terminal and an oxygen output terminal; the air pretreatment terminal is used for filtering and purifying air entering the system; the oil-free compressor terminal is used for providing gas pressure and conveying pretreated air to the adsorption terminal; the adsorption terminal is used for separating oxygen from air through an adsorbent and conveying the oxygen to the oxygen storage terminal; the oxygen storage terminal is used for storing the prepared oxygen according to the target pressure value; the control terminal is used for monitoring and adjusting control parameters related to the oxygen production process; the oxygen output terminal is used for outputting oxygen out of the system according to the requirements of a user;
the air pretreatment terminal comprises a filtering module and a purifying module; the filter module is used for filtering air entering the system to remove dust and moisture in the air; the purification module is used for purifying the air after filtering and removing grease in the air;
The control terminal comprises an energy efficiency regulation and control module and a working process control module; the energy efficiency regulation and control module is used for calculating the energy efficiency in real time and generating a corresponding energy efficiency regulation and control instruction according to a calculation result; the working process control module is used for controlling the air pretreatment terminal, the oil-free compressor terminal, the adsorption terminal, the oxygen storage terminal and the oxygen output terminal to complete the working process of oxygen production according to the energy efficiency regulation and control instruction and the working instruction input by a user.
2. The oxygen-making oil-free compressor based on vpsa mode as set forth in claim 1, wherein the energy efficiency control module includes an energy efficiency calculation sub-module and an energy efficiency control instruction generation sub-module; the energy efficiency calculation submodule is used for calculating energy efficiency according to the oxygen amount of the oxygen storage terminal and the oxygen production energy consumption; the energy efficiency regulation instruction generation sub-module is used for generating corresponding energy efficiency regulation instructions according to energy efficiency;
When the energy efficiency calculation submodule works, the following equation is satisfied:
；
；
Wherein, efficiency energy represents energy efficiency; Representing a multiple selection function based on the number of years of use versus the fault difference value; y represents the service years of the oxygen-making oil-free compressor; t 1 and t 2 respectively represent a standard value of the number of faults and the actual number of faults of the oxygen-making oil-free compressor; beta represents a proportional threshold; o a represents the oxygen amount value produced by the oxygen-making oil-free compressor in the a working period; a represents the total number of working cycles of the same day; c a represents the electric energy consumption value consumed by the oxygen-making oil-free compressor in the a-th working period;
When (when) When the energy efficiency regulation instruction generation submodule generates an energy efficiency regulation instruction for regulating the oxygen amount or reducing the electric energy consumption; e ref represents a standard value of energy efficiency.
3. A control system of an oxygen-making oil-free compressor based on vpsa mode, which is used for controlling the oxygen-making oil-free compressor based on vpsa mode according to claim 2, and is characterized in that the control system of the oxygen-making oil-free compressor comprises a live data acquisition terminal, a live data processing terminal and an oxygen-making process regulation terminal; the live data acquisition terminal is used for acquiring live data from the air pretreatment terminal, the oil-free compressor terminal, the adsorption terminal, the oxygen storage terminal and the oxygen output terminal; the live data processing terminal is used for carrying out data processing and analysis on all live data and generating corresponding processing result information; the oxygen production process regulation and control terminal is used for generating corresponding oxygen production process regulation and control instructions according to the processing result information.
4. A control system of an oxygen-making oil-free compressor based on vpsa mode as in claim 3, wherein said live data processing terminal comprises a control signal calculation module and a control signal generation module; the control signal calculation module is used for calculating a control signal according to the actual pressure value and the target pressure value of the oil-free compressor terminal; the control signal generation module is used for generating a control signal according to the calculation result of the control signal calculation module;
when the control signal calculation module works, the following formula is satisfied:
；
；
Wherein u (t) represents a control signal for driving a system to adjust the oxygen pressure of the oxygen output terminal; k p、Ki、Kd and K t represent a proportional gain coefficient, an integral gain coefficient, a differential gain coefficient, and a time-lag gain coefficient, respectively; e (t) represents the difference between the target value and the actual value of the oxygen pressure of the oxygen output terminal at the time t; Representing an integral term for e (t); /(I) Representing a derivative term to e (t); /(I)Representing a time-lag function; /(I)Representing the difference between the target value and the actual value of the oxygen pressure at the oxygen output terminal at time t-deltat.
5. A control method of an oxygen-making oil-free compressor based on vpsa mode, which is applied to a control system of an oxygen-making oil-free compressor based on vpsa mode as set forth in claim 4, characterized in that the control method of the oxygen-making oil-free compressor comprises the following steps:
S1, acquiring live data from the air pretreatment terminal, the oil-free compressor terminal, the adsorption terminal, the oxygen storage terminal and the oxygen output terminal;
S2, carrying out data processing and analysis on all live data to generate corresponding processing result information;
S3, generating a corresponding oxygen production process regulation instruction according to the processing result information.
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