Gas production control system, method and equipment and computer readable storage medium

Abstract

The embodiment of the invention provides a gas production control system, method and equipment and a computer readable storage medium, the system comprises a first controller, a second controller, an acquisition sensor and a gas treatment device, and the gas treatment device comprises a heating circuit; the first controller is electrically connected with the acquisition sensor and the heating circuit to form a first control loop; the second controller is electrically connected with the acquisition sensor and the heating circuit to form a second control loop, and the acquisition sensor is used for transmitting the process parameters to the controller; the first controller is used for triggering the heating circuit to adjust the heating power of the gas treatment device or controlling the gas treatment device to stop working according to the process parameters; and the second controller is used for controlling the gas treatment device to stop working according to the process parameters. According to the embodiment of the invention, dangerous cases in the gas production process can be reduced or even eliminated, and the safety of gas preparation can be improved.

Description

Technical Field

[0001] The present application relates to the field of gas production technology, and in particular to a gas production control system, method, device and computer-readable storage medium. Background Art

[0002] In the chemical industry, safe production is of vital importance. The use of industrial automation control systems can monitor the status of chemical production and promptly trigger the corresponding safety protection devices in the control system according to dangerous phenomena, and issue alarms or stop the machine.

[0003] For example, in the drying and purification process of hydrogen, sensors usually transmit the collected process parameters to the PLC controller. After the PLC controller analyzes and processes them, if it is determined to be a dangerous phenomenon, it can send out an alarm signal or trigger the disconnection of the connected load circuit to stop the process equipment.

[0004] However, existing industrial automation control systems use PLC control loops for monitoring and control. When any hardware in the PLC control loop fails, the alarm or shutdown will fail, increasing the risk of production safety accidents. Summary of the invention

[0005] The embodiments of the present application provide a gas production control system, method, device and computer-readable storage medium to solve the problems of poor system reliability and high safety risks in existing gas production processes.

[0006] In order to solve the above problems, this application is implemented as follows:

[0007] In a first aspect, an embodiment of the present application provides a gas production control system, the gas production control system comprising: a first controller, a second controller, a collection sensor and a gas processing device, the gas processing device comprising a heating circuit;

[0008] The first controller is electrically connected to the acquisition sensor and the heating circuit to form a first control loop; the second controller is electrically connected to the acquisition sensor and the heating circuit to form a second control loop;

[0009] The acquisition sensor is used to transmit process parameters in the gas production process to the first controller and the second controller;

[0010] The first controller is used to trigger the heating circuit to adjust the heating power of the gas processing device or control the gas processing device to stop working according to the process parameters;

[0011] The second controller is used to control the gas processing device to stop working according to the process parameters.

[0012] Optionally, the gas production control system further comprises a control valve arranged on the gas transmission path, and the control valve is electrically connected to the first controller and the second controller at the same time;

[0013] When the first controller or the second controller controls the gas processing device to stop working, it also controls the control valve to close.

[0014] Optionally, the first controller is used to trigger the heating circuit to adjust the heating power of the gas processing device when the process parameter meets the first process condition, and is also used to control the gas processing device to stop working when the process parameter meets the second process condition;

[0015] The second controller is used to control the gas processing device to stop working when the process parameter meets the third process condition.

[0016] Optionally, the process parameters include temperature T;

[0017] The first process condition is T1≤T<T2, the second process condition is T2≤T<T3, the third process condition is T3<T, T1 is the first temperature threshold, T2 is the second temperature threshold, and T3 is the third temperature threshold.

[0018] Optionally, the heating circuit comprises a circuit breaker, a contactor, a power controller and a heating wire which are electrically connected in sequence;

[0019] The circuit breaker is also electrically connected to the second controller, and the power controller is also electrically connected to the first controller.

[0020] Optionally, the gas processing device further includes a plurality of process towers, each of which is provided with a corresponding heating circuit, and the heating circuit is used to heat the gas in the process tower.

[0021] Optionally, the gas processing device further comprises a plurality of process towers, each of the plurality of process towers is provided with the heating wire, and the heating wires are all electrically connected to the output end of the same power controller.

[0022] Optionally, at least two of the acquisition sensors are provided in the process tower;

[0023] The first controller and / or the second controller are electrically connected to at least two of the acquisition sensors.

[0024] In a second aspect, an embodiment of the present application provides a gas production control method, which is used for a gas production control system, and the gas production control system includes: a first controller, a second controller, a collection sensor and a gas processing device, and the gas processing device includes a heating circuit; the first controller is electrically connected to the collection sensor and the heating circuit to form a first control loop; the second controller is electrically connected to the collection sensor and the heating circuit to form a second control loop; the gas production control method includes:

[0025] receiving process parameters during gas production;

[0026] According to the process parameters, the first controller triggers the heating circuit to adjust the heating power of the gas processing device or control the gas processing device to stop working;

[0027] According to the process parameters, the second controller controls the gas processing device to stop working.

[0028] Optionally, the gas production control system further includes a control valve disposed on a gas transmission path, and controlling the gas processing device to stop working further includes: controlling the control valve to close.

[0029] Optionally, triggering the heating circuit by the first controller to adjust the heating power of the gas processing device and controlling the gas processing device to stop working according to the process parameters includes:

[0030] When the process parameter meets a first process condition, the first controller triggers the heating circuit to adjust the heating power of the gas processing device, and when the process parameter meets a second process condition, the first controller controls the gas processing device to stop working;

[0031] According to the process parameters, the second controller controls the gas processing device to stop working, including:

[0032] When the process parameter meets the third process condition, the second controller controls the gas processing device to stop working.

[0033] Optionally, the process parameters include temperature T;

[0034] The first process condition is T1≤T<T2, the second process condition is T2≤T<T3, the third process condition is T3<T, T1 is the first temperature threshold, T2 is the second temperature threshold, and T3 is the third temperature threshold.

[0035] Optionally, the heating circuit includes a circuit breaker, a contactor, a power controller and a heating wire electrically connected in sequence; the heating circuit also includes a safety relay; the circuit breaker is electrically connected to a normally closed contact of the safety relay, and the second controller is electrically connected to a coil of the safety relay;

[0036] The controlling of the gas processing device to stop working by the second controller further includes:

[0037] The second controller cuts off the circuit breaker through the safety relay.

[0038] Optionally, the gas processing device further comprises a plurality of process towers, at least two of the acquisition sensors are arranged in the process towers, and the first controller and / or the second controller are electrically connected to the at least two acquisition sensors;

[0039] The process parameters of the receiving gas production process include:

[0040] Acquiring process parameters transmitted by at least two of the acquisition sensors respectively;

[0041] The process parameters are calibrated with each other based on the process parameters respectively transmitted by at least two of the acquisition sensors.

[0042] In a third aspect, an embodiment of the present application provides a gas production control device, comprising a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the gas production control method described in the first aspect of the embodiment of the present application.

[0043] In a third aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the gas production control method described in the first aspect of the embodiment of the present application.

[0044] In the gas production control system of the embodiment of the present application, an additional second control loop is utilized as a redundant backup of the first control loop, and is specifically used to control the gas processing device to stop working. Compared with the first control loop, the function it undertakes is more specific, and hardware interference when there are more control functions can be avoided. Compared with the first control loop, the second control loop is more reliable in safety monitoring, which helps to reduce or even eliminate dangerous situations in the gas production process and can improve the safety of the gas preparation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0046] Figure 1 A schematic diagram showing the hardware composition of a gas production control system according to an embodiment of the present invention is shown;

[0047] Figure 2 The electrical wiring diagram of the first gas production control system in the embodiment of the present invention is shown;

[0048] Figure 3 The electrical wiring diagram of the second gas production control system in the embodiment of the present invention is shown;

[0049] Figure 4 The electrical wiring diagram of the third gas production control system in the embodiment of the present invention is shown;

[0050] Figure 5 The fourth gas production control system according to the embodiment of the present invention is shown in the electrical wiring diagram;

[0051] Figure 6 A schematic diagram of another gas production control system according to an embodiment of the present invention is shown;

[0052] Figure 7 A schematic diagram of another gas production control system according to an embodiment of the present invention is shown;

[0053] Figure 8 A flow chart of a gas production control method in an embodiment of the present invention is shown.

[0054] Description of the accompanying drawings:

[0055] First controller-10, second controller-11, collection sensor-12, gas processing device-13, heating circuit-131, circuit breaker-1311, contactor-1312, power controller-1313, heating wire-1314, process tower-132. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present invention. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0058] In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0059] In the gas preparation process of the chemical industry, the use of gas production control systems to monitor the gas production process in real time can effectively prevent production safety accidents. When preparing some gases, the process steps involving heating treatment (for example, drying or deoxygenation) will form a high temperature environment of 200℃ to 300℃. High temperature can easily cause hardware failures in the gas production control system, causing safety risks. In addition, during gas preparation, the gas production control system often needs to make different response measures according to the different stages of gas preparation. Therefore, the system needs to frequently adjust the control strategy, which can easily lead to inaccurate system control strategies, causing safety hazards to the system and causing safety risks.

[0060] Therefore, the embodiment of the present application designs a gas production control system having a second control loop that can work in parallel with the first control loop to monitor and control the gas preparation process, thereby improving safety.

[0061] Reference Figure 1 , shows a gas production control system provided by an embodiment of the present application, the gas production control system comprises: a first controller 10, a second controller 11, a collection sensor 12 and a gas processing device 13, the gas processing device 13 comprises a heating circuit 131;

[0062] The first controller 10 is electrically connected to the acquisition sensor 12 and the heating circuit 131 to form a first control loop L1; the second controller 11 is electrically connected to the acquisition sensor 12 and the heating circuit 131 to form a second control loop L2;

[0063] The acquisition sensor 12 is used to transmit the process parameters in the gas production process to the first controller 10 and the second controller 11;

[0064] The first controller 10 is used to trigger the heating circuit 131 to adjust the heating power of the gas processing device 13 or control the gas processing device 13 to stop working according to the process parameters;

[0065] The second controller 11 is used to control the gas processing device 13 to stop working according to the process parameters.

[0066] Figure 1 This is a schematic diagram of the hardware composition of a gas production control system according to an embodiment of the present application. This gas production control system has two independent control loops that can jointly monitor and control the gas production process. When one of the control loops fails and cannot perform the monitoring and control function, the other control loop can monitor and control the gas production process. Figure 1 The illustrated gas production control system can realize a redundant backup design of dual control loops, which can improve the working reliability of the gas production control system and help reduce the risk of production safety accidents.

[0067] Combination Figure 1 As shown in the figure, the gas production control system of the embodiment of the present application may include: two independent controllers, a data acquisition sensor 12 and a gas processing device 13. The two independent controllers are a first controller 10 and a second controller 11. The first controller 10 and the second controller 11 are control modules with data processing functions, and may be modules formed with processor chips such as CPU, MCU, FPGA, etc. as the core. The data acquisition sensor 12 in the gas production control system is a production data acquisition device in the gas production control system, which can collect at least one of the process parameters such as temperature and pressure in the gas production process, which is specifically determined by the function type of the data acquisition sensor 12. The gas processing device 13 includes a heating circuit 131, which is used to heat and dry the gas during the purification process of gas production.

[0068] To facilitate the description of the gas production control system disclosed in the embodiments of the present application, the following embodiments will be described using the gas production control system for a hydrogen purification process as an example.

[0069] Combination Figure 1 As shown in the figure, the first controller 10 is electrically connected to the acquisition sensor 12, and the first controller 10 is also electrically connected to the heating circuit 131, and the three are connected to form the first control loop L1 shown in the figure. The second controller 11 is electrically connected to the acquisition sensor 12, and the second controller 10 is also electrically connected to the same heating circuit 131, and the three are connected to form the second control loop L2 shown in the figure.

[0070] Specifically, the safety level of the second controller 11 in the second control loop L2 is higher than that of the first controller 10 in the first control loop L1, so that the second control loop L2 is more reliable in terms of safety monitoring than the first control loop L1. This setting allows the first control loop L1 to more efficiently respond to fault recovery in the gas production control system, minimize the interruption of the production process, and allow the second control loop L2 to take immediate action to put the gas production control system into a safe state when receiving a danger signal. While avoiding the reduction in life and production caused by frequent shutdowns of the gas production control system, it helps to reduce or even eliminate dangerous situations in the gas production process and improve the safety of the gas preparation process.

[0071] It should be noted that the acquisition sensor 12 connected to the first controller 10 and the acquisition sensor 12 connected to the second controller 11 in the embodiment of the present application can be the same sensor, that is, the two controllers share the same sensor to acquire process parameters. Alternatively, the acquisition sensor 12 connected to the first controller 10 and the acquisition sensor 12 connected to the second controller 11 in the embodiment of the present application are two sensors with different performance levels, and the first controller 10 and the second controller 11 each acquire process parameters through the corresponding sensor.

[0072] When the gas processing device 13 is used to purify the prepared hydrogen, the heating circuit 131 inside it dries the hydrogen, and the acquisition sensor 12 collects the process parameters in the drying container and transmits them to the first controller 10 and the second controller 11 through the signal line. In daily normal production activities, the first controller 10 is in an enabled state, and the first controller 10 can control the heating power of the gas processing device 13 according to the real-time process parameters. For example, when the temperature in the drying container is lower than the preset value, the current of the heating circuit 131 can be increased to increase the heating power of the gas processing device 13. When the temperature in the drying container is higher than the preset value, the current of the heating circuit 131 can be reduced to reduce the heating power of the gas processing device 13.

[0073] In addition, the first controller 10 can also control the gas processing device 13 to stop working. For example, when a dangerous alarm such as over-temperature or over-pressure occurs during the production process, the first controller 10 can disconnect the power supply of the gas processing device 13, so that the heating circuit 131 in the gas processing device 13 stops heating, and the control valve in the pipeline of the gas production control system is closed.

[0074] Therefore, the first controller 10 of the embodiment of the present application has at least two control functions, which can perform the heating power adjustment function, or control the gas processing device 13 to stop working. The two functions can be started in different time periods or different production scenarios respectively.

[0075] It should be noted that any hardware in the first controller 10, the collection sensor 12 and the heating circuit 131 in the first control loop has a certain probability of failure. When the collection sensor 12 fails, the first controller 10 may misjudge that it cannot trigger the gas processing device 13 to stop working. When the first controller 10 fails, it may not be able to send accurate and effective control signals. When the gas processing device 13 fails, it may not be able to stop the operation of the equipment.

[0076] Therefore, in the embodiment of the present application, another control loop is added to the gas production control system on the basis of the above-mentioned first control loop L1, namely the second control loop L2 shown in the figure. Unlike the first control loop L1, the control of the gas processing device 13 by the second control loop L2 does not serve the purpose of drying and purification, but serves as a safety backup when the first control loop L1 fails. When the first controller 10 is in the enabled state, the second controller 11 can also remain in the working state, and can continuously receive the process parameters transmitted from the acquisition sensor 12 connected thereto, and the process parameters in the drying container are also transmitted to the first controller 10 at the same time.

[0077] When the monitoring function of the first control loop L1 is normal and effective, the first controller 10 adjusts the heating power of the gas processing device 13 according to the set process program, or controls the gas processing device 13 to stop working when a dangerous situation occurs. In this process, although the process parameters are also transmitted to the second controller 11, the second controller 11 can maintain a silent standby mode and will not trigger the start and stop of the gas processing device 13.

[0078] When the monitoring function of the first control loop L1 fails, the process parameters in the drying container will change uncontrollably. Once the process parameters exceed the upper threshold limit that can be monitored by the first control loop L1, the process parameters can activate the second controller 11. The second controller 11 can determine that a dangerous situation has occurred and the first control loop L1 has failed to eliminate the dangerous situation. That is, under the intervention of the first control loop L1, the heating circuit 131 in the gas production control system cannot be effectively disconnected to stop heating, or more dangerously, the first controller 10 can neither stop the heating circuit 131 from heating nor close the control valve in the pipeline. At this time, the second controller 11 can directly control the gas processing device 13 to stop working, instead of repeatedly adjusting the heating power of the gas processing device 13.

[0079] Therefore, in the gas production control system of the embodiment of the present application, an additional second control loop is utilized as a redundant backup of the first control loop, and is specifically used to control the gas processing device to stop working. Compared with the first control loop, the function it undertakes is more specific, and hardware interference when there are more control functions can be avoided. Compared with the first control loop, the second control loop is more reliable in safety monitoring, which helps to reduce or even eliminate dangerous situations in the gas production process and can improve the safety of the gas preparation process.

[0080] Optionally, the gas production control system further comprises a control valve arranged on the gas transmission path, and the control valve is electrically connected to the first controller 10 and the second controller 11 at the same time;

[0081] When the first controller 10 or the second controller 11 controls the gas processing device 13 to stop working, it also controls the control valve to close.

[0082] Specifically, it can be understood that the gas is transmitted through pipelines in different devices, and a control valve is installed on the gas transmission path. The control valve can be a solenoid valve installed at the air inlet position and the air outlet position of the pipeline, and the opening and closing of the control valve realizes the control of gas transmission. In one embodiment, when the control valve is connected to the first controller 10, the first controller 10 can also close all the control valves at different positions in the pipeline when the control gas processing device 13 stops working, thereby cutting off the transmission of the gas. When the control valve is connected to the second controller 11, the second controller 11 can also close all the control valves at different positions in the pipeline when the control gas processing device 13 stops working, thereby cutting off the transmission of the gas.

[0083] The gas production control system of the embodiment of the present application can be used in the preparation of some gases with flammable and explosive properties. If the gas production system fails to cut off the gas transmission after the gas processing device 13 stops working, the system will have a potential gas leakage risk, thus posing a major safety hazard. Therefore, after controlling the gas processing device 13 to stop working, closing the control valve to cut off the gas transmission can effectively prevent accidents and ensure the safety of the production environment.

[0084] In other gas production situations, since the gas may reach a high temperature of 200°C to 300°C during the preparation process, if the gas processing device 13 continues to transport gas after stopping work, it may also cause serious burns to the on-site workers. Therefore, after the gas processing device 13 is controlled to stop working, the control valve is closed in time to cut off the gas transmission, which can effectively prevent accidents and ensure the safety of the production environment.

[0085] Therefore, the first controller 10 or the second controller 11 can cut off the transmission of gas while cutting off the gas processing device 13 to stop heating, thereby shutting down the entire gas production system and ensuring safety.

[0086] Optionally, the first controller 10 is used to trigger the heating circuit 131 to adjust the heating power of the gas processing device 13 when the process parameter meets the first process condition, and is also used to control the gas processing device 13 to stop working when the process parameter meets the second process condition;

[0087] The second controller 11 is used to control the gas processing device 13 to stop working when the process parameter meets the third process condition.

[0088] Specifically, different process conditions are configured in the first controller 10 and the second controller 11, respectively. When the first controller 10 receives the process parameters from the acquisition sensor 12, after comparing with the preset process conditions, if the process parameters meet the first process conditions, the control signal sent by the first controller 10 is a signal for controlling the current of the heating circuit 131, which can adjust the heating power of the gas processing device 13. If the process parameters meet the second process conditions, the control signal sent by the first controller 10 is a signal for shutting down the gas processing device 13, which can control the gas processing device 13 to stop working.

[0089] The third process condition may be preset in the second controller 11 . If the process parameters meet the third process condition, the control signal sent by the second controller 11 is a signal for shutting down the gas processing device 13 , and the gas processing device 13 may be controlled to stop working.

[0090] The first controller 10 and the second controller 11 both have the function of controlling the gas processing device 13 to stop working. It is necessary to avoid conflicts in the control logics of the two controllers, and it is also necessary to ensure the stability of adjusting the heating power of the gas processing device 13. Therefore, making the first controller 10 and the second controller 11 have relatively independent control logics can make the gas production system run stably, avoid control logic conflicts, and reduce the safety risks of system operation. Therefore, combined with the control process of the embodiment of the present application, it can be understood that the first process condition, the second process condition, and the third process condition are increasingly strict, which means that the degree of danger corresponding to the process parameters increases successively. Therefore, when the process parameters exceed the second process conditions and fall into the range of the third process conditions, it means that the current first control loop L1 has failed, and the second controller 11 is required to directly shut down the gas processing device 13.

[0091] Optionally, the process parameters include temperature T;

[0092] The first process condition is T1≤T<T2, the second process condition is T2≤T<T3, the third process condition is T3<T, T1 is the first temperature threshold, T2 is the second temperature threshold, and T3 is the third temperature threshold.

[0093] Specifically, in one embodiment, the acquisition sensor 12 can be a temperature sensor installed in the drying container corresponding to the heating circuit 131, and transmits the ambient temperature feedback in the drying container to the first controller 10 and the second controller 11 for analysis and judgment and execution of corresponding control functions.

[0094] In this gas production control system, the process parameters include temperature T, which is the real-time temperature collected by the acquisition sensor 12, reflecting the real-time ambient temperature in the drying container where the gas is located. Three temperature thresholds can be set in the system, the first temperature threshold T1, the second temperature threshold T2 and the third temperature threshold T3, T1<T2<T3. The first process condition is T1≤T<T2, the second process condition is T2≤T<T3, and the third process condition is T3<T. The first process condition and the second process condition can be set in the first controller 10, and the third process condition can be set in the second controller 11. The temperature interval [T1, T2) is the temperature condition required for gas drying, and the temperature interval [T2, T3) is the temperature condition that the first controller 10 determines to have a lower safety risk after the temperature in the drying container rises. When the temperature is greater than T3, that is, when the temperature in the drying container continues to rise, the second controller 11 determines to have a higher safety risk.

[0095] In addition, in some embodiments, the first control loop L1 can be a PLC control loop, and the second control loop L2 can be a SIS (Safety Instrumented System) control loop or a DCS (Distributed Control System) control loop that is more specialized than the PLC control loop and is specifically used for industrial production safety monitoring. For example, when the second control loop L2 is a SIS control loop, the second controller 11 can be a SIS controller. At this time, the hardware such as the temperature sensor 12 used in the second control loop L2 can all be high-reliability power electronic devices that meet the SIL rating certification. As a result, the second control loop L2 has a lower failure rate than the first control loop L1.

[0096] Optionally, refer to Figures 2 to 5 In any schematic, the heating circuit 131 includes a circuit breaker 1311, a contactor 1312, a power controller 1313 and a heating wire 1314 which are electrically connected in sequence;

[0097] The circuit breaker 1311 is also electrically connected to the second controller 11 , and the power controller 1313 is also electrically connected to the first controller 10 .

[0098] Specifically, if Figures 2 to 5 As shown in any schematic diagram of the present application, the heating circuit 131 of the embodiment of the present application may include a circuit breaker 1311, a contactor 1312, a power controller 1313 and a heating wire 1314, and these devices are electrically connected in sequence. The circuit breaker 1311 and the contactor 1312 can both control the on and off of the heating circuit 131. When any one of the circuit breaker 1311 and the contactor 1312 is disconnected, the power supply circuit of the heating wire 1314 is disconnected, and the heating circuit 131 can be stopped at this time. Therefore, the circuit breaker 1311 and the contactor 1312 are redundant with each other, which can improve the reliability of the heating circuit 131 being cut off when a dangerous situation occurs. The power controller 1313 is connected to the heating circuit 131 to adjust the heating power of the heating wire 1314, which can maintain the conditions for gas drying and purification. In addition, when the power supply of the power controller 1313 itself is cut off, the heating power of the heating wire 1314 cannot be maintained, and the heating circuit 131 can also be stopped.

[0099] The circuit breaker 1311 is also electrically connected to the second controller 10, and the second controller 10 can control the heating circuit 131 by controlling the working state of the circuit breaker 1311, for example, stopping the gas processing device 13. The power controller 1313 is also electrically connected to the first controller 10, and the first controller 10 can control the heating circuit 131 by controlling the output power of the power controller 1313, for example, adjusting the heating power, or stopping the gas processing device 13.

[0100] Optionally, refer to Figures 2 to 5 In any schematic, the heating circuit 13 further includes a safety relay 1315;

[0101] The circuit breaker 1311 is electrically connected to the normally closed contact of the safety relay 1315 , and the second controller 11 is electrically connected to the coil of the safety relay 1315 . The second controller 11 controls the on and off of the circuit breaker 1311 through the safety relay 1315 .

[0102] Specifically, if Figures 2 to 5As shown in any schematic diagram, in the heating circuit 13 of the embodiment of the present application, in addition to the circuit breaker 1311, the contactor 1312, the power controller 1313 and the heating wire 1314 electrically connected in sequence, the heating circuit 13 can also be configured with a safety relay 1315 that meets the SIL safety certification. After the second controller 11 is connected to the safety relay 1315, the control signal output by the second controller 11 can be used to control the coil of the safety relay 1315 to lose power, and then the circuit breaker 1311 can be cut off after the normally closed contact of the safety relay 1315 is closed. The safety relay 1315 can improve the reliability of the interlocking control of the circuit breaker 1311 by the second controller 11, and can effectively cut off the heating circuit 13, which helps to eliminate production accidents.

[0103] Optionally, refer to Figures 2 to 3 In any illustration, the normally open contact of the safety relay 1315 is electrically connected to the power supply line between the power supply of the power controller 1313 and the power controller 1313;

[0104] The second controller 11 controls the start and stop of the power controller 1313 through the safety relay 1315 .

[0105] Specifically, in one embodiment, Figures 2 to 3 As shown in any schematic diagram, the normally open contact of the safety relay 1315 is also connected to the power supply line between the power supply of the power controller 1313 and the power controller 1313. When the second controller 11 controls the coil of the safety relay 1315 to lose power, the normally open contact of the safety relay 1315 can cut off the working power of the power controller 1313 after being disconnected. When the working power of the power controller 1313 itself is cut off, the heating power of the heating wire 1314 can no longer be maintained, and the heating circuit 131 can also stop working. It should be noted that the second controller 11 can control the power on and off of the power controller 1313 through the safety relay 1315, and the current adjustment of the power controller 1313 to the heating wire 1314 can still be controlled by the second controller 10.

[0106] Optionally, refer to Figures 4 to 5 In any schematic, the gas production control system further includes a temperature controller 1316;

[0107] The signal input terminal of the temperature controller 1316 is electrically connected to the acquisition sensor 12, the alarm output terminal of the temperature controller 1316 is electrically connected to the first controller 10, and the normally open contact of the safety relay 1315 is electrically connected to the power supply line between the temperature controller 1316 and the power controller 1313;

[0108] The second controller 11 controls the on / off between the temperature controller 1316 and the power controller 1313 through the safety relay 1315 .

[0109] Specifically, in one embodiment, Figure 4 or Figure 5 The gas production control system further includes a temperature controller 1316, a signal input terminal of the temperature controller 1316 is electrically connected to the acquisition sensor 12, an alarm output terminal of the temperature controller 1316 is electrically connected to the first controller 10, and the temperature controller 1316 is also electrically connected to the power controller 1313. The acquisition sensor 12 transmits the real-time temperature parameters to the temperature controller 1316, and the temperature controller 1316 can judge whether to send a power adjustment signal to the power controller 1313 or transmit an alarm signal to the first controller 10 according to the process conditions satisfied by the temperature parameters.

[0110] In this gas production control system, the normally open contacts of the safety relay 1315 are electrically connected to the power supply line between the temperature controller 1316 and the power controller 1313. When the second controller 11 controls the coil of the safety relay 1315 to lose power, the normally open contacts of the safety relay 1315 are disconnected to cut off the working power of the power controller 1313. When the working power of the power controller 1313 itself is cut off, the heating power of the heating wire 1314 can no longer be maintained, and the heating circuit 131 can also stop working.

[0111] Optionally, refer to Figures 2 to 5 As shown in any diagram, the gas production control system further includes an ammeter 1317 electrically connected to the heating circuit 131 . The ammeter 1317 is also electrically connected to the first controller 10 . The ammeter 1317 is used to monitor the current signal in the heating circuit 131 .

[0112] Specifically, in one embodiment, Figures 2 to 5 As shown in any schematic diagram, an ammeter 1317 can also be connected to the heating circuit 131. The ammeter 1317 is connected to the phase line of the three-phase power supply line and can be located at any position between the circuit breaker 1311, the contactor 1312 and the power controller 1313, as long as it can monitor the current signal in the heating circuit 131. Figure 2 In the schematic diagram of FIG. 1 , the ammeter 1317 is located between the contactor 1312 and the power controller 1313. The ammeter 1317 can be used to monitor the current signal in the heating circuit 131, and transmit the current signal to the first controller 10. The first controller 10 can determine whether the corresponding heating circuit 131 is normal. Specifically, the current of each phase line can be monitored, so as to accurately determine which phase line the fault occurs in.

[0113] Optionally, refer to Figure 6 The gas processing device 13 further includes a plurality of process towers 132, each of which is provided with a corresponding heating circuit 131, and the heating circuit 131 is used to heat the gas in the process tower.

[0114] Specifically, if Figure 6 As shown, in one embodiment, the gas processing device 13 of the embodiment of the present application further includes a plurality of process towers 132, and the process towers 132 may be drying towers or deoxidation towers. For example, Figure 6 In the figure, from left to right, the three process towers 132 may be a deoxidation tower, a drying tower, a drying tower, and a drying tower, respectively. Figure 6 In the figure, the flow direction of hydrogen is the direction of the thick arrow. The hydrogen is first deoxidized by the deoxidation tower and then enters the three drying towers on the right for drying. The thin solid lines in the figure represent the two independent control loops of the system. In addition, the dotted lines also indicate the opening and closing control of the control valves at different positions by the two controllers. For example, Figure 6 In the schematic diagram, whether it is the first controller 10 or the second controller 11, each can independently control the control valve provided on the air inlet or outlet pipeline of each process tower 132. It should be noted that in the process of hydrogen purification, since the deoxygenation tower in the hydrogen gas treatment device 13 takes away the water generated by the reaction of hydrogen and oxygen in the form of high-temperature heated steam, the heating form is a built-in heater or an external heater, and the drying tower adopts an adsorption method, using a molecular sieve as an adsorbent. The adsorption of the molecular sieve is physical adsorption. When the adsorption is saturated, it takes a period of time to heat and regenerate before it can be adsorbed again. Therefore, a gas treatment device 13 contains at least two drying towers. When one drying tower is working, the other drying tower is regenerated. The two drying towers work alternately, which can realize continuous drying of hydrogen and ensure the continuous production of hydrogen with a stable dew point. Of course, on this basis, the number of drying towers can be further increased to shorten the continuous working time of a single drying tower, so as to facilitate the maintenance of the gas treatment device 13.

[0115] Combination Figure 6 As shown in the figure, no matter which process the process tower 132 is used in, the corresponding process tower 132 is respectively provided with a heating circuit 131. At this time, the number of process towers 132 and heating circuits 131 remains consistent and corresponds one to one. The heating circuit 131 can heat the gas in the corresponding process tower.

[0116] Optionally, refer to Figure 7 The gas processing device 13 also includes a plurality of process towers 132 , each of which is provided with a heating wire 1314 , and each of the heating wires 1314 is electrically connected to the output end of the same power controller 1313 .

[0117] Specifically, if Figure 7 As shown, the embodiment of the present application also provides another gas processing device 13 including multiple process towers 132, Figure 6 The difference is that each of the multiple process towers 132 is provided with a heating wire 1314. At this time, the number of process towers 132 and heating wires 1314 is consistent and one-to-one corresponding, and the heating wires 1314 are all electrically connected to the output end of the same power controller 1313. At this time, the electrical wiring of the system can refer to Figure 3 or Figure 5 In this gas processing device 13, multiple heating wires 1314 share a group of power controllers 1313, circuit breakers 1311 and contactors 1312, which can control the temperature in each process tower 132, reduce the reuse of power electronic devices, and reduce circuit costs.

[0118] Optionally, at least two of the acquisition sensors 12 are provided in the process tower 132;

[0119] The first controller 10 and / or the second controller 11 are electrically connected to at least two acquisition sensors 12 .

[0120] Specifically, in one embodiment, at least two acquisition sensors 12 are provided in any process tower 132. At this time, at least one of the first controller 10 and the second controller 11 can simultaneously receive process parameters transmitted from different acquisition sensors 12. The process parameters transmitted by different acquisition sensors 12 can be referenced and verified with each other to reduce the error of the parameters input from one end of the acquisition sensor 12.

[0121] For example, at least two acquisition sensors 12 may be MooN (M out of N) redundant architecture, N represents the total number of channels, which can be the total number of acquisition sensors 12, and M represents the minimum number of channels required to trigger the first controller 10 and / or the second controller 11 to perform a function. For example, when there are two acquisition sensors 12, if a 1oo2 redundant architecture is adopted, when the temperature signal sent by one of the two acquisition sensors 12 meets the corresponding process conditions, the first controller 10 and / or the second controller 11 controls the corresponding operation. If a 2oo2 redundant architecture is adopted, when the temperature signals sent by both acquisition sensors 12 meet the corresponding process conditions, the first controller 10 and / or the second controller 11 controls the corresponding operation. Similarly, the principles of 2oo3 and 2oo4 redundant architectures are to set a decision-making mechanism for the output signal of the acquisition sensor 12, that is, the principle of minority obeys majority, so as to prevent the occurrence of false operations and improve the reliability of the system.

[0122] Reference Figure 8 , showing a flow chart of a gas production control method provided by an embodiment of the present application, the gas production control method is used for the gas production control system introduced in the above embodiment, the basic composition and connection of the gas production control system can be seen in Figure 1 The illustrations and descriptions of the aforementioned embodiments are not repeated here.

[0123] Specifically, the gas production control method of the embodiment of the present application includes:

[0124] Step S101, receiving process parameters in a gas production process.

[0125] Combination Figure 1 As shown in FIG. 1 , the acquisition sensor 12 can transmit at least one process parameter such as the collected temperature and air pressure to at least one of the first controller 10 and the second controller 11 for analysis and processing by the corresponding controller, and can output a corresponding control signal.

[0126] Step S102 : According to the process parameters, the first controller 10 triggers the heating circuit 131 to adjust the heating power of the gas processing device 13 or control the gas processing device 13 to stop working.

[0127] In normal daily production activities, the first controller 10 is in an enabled state, and the first controller 10 can control the heating power of the gas processing device 13 according to the real-time process parameters. For example, when the temperature in the drying container is lower than the preset value, the current of the heating circuit 131 can be increased to increase the heating power of the gas processing device 13. When the temperature in the drying container is higher than the preset value, the current of the heating circuit 131 can be reduced to reduce the heating power of the gas processing device 13.

[0128] In addition, the first controller 10 can also control the gas processing device 13 to stop working. For example, when a dangerous alarm such as over-temperature or over-pressure occurs during the production process, the first controller 10 can disconnect the power supply of the gas processing device 13, so that the heating circuit 131 in the gas processing device 13 stops heating, and the control valve in the pipeline of the gas production control system is closed.

[0129] Step S103: According to the process parameters, the second controller controls the gas processing device to stop working.

[0130] In the embodiment of the present application, another control loop is added to the gas production control system on the basis of the above-mentioned first control loop L1, namely the second control loop L2 shown in the figure. Unlike the first control loop L1, the control of the gas processing device 13 by the second control loop L2 does not serve the purpose of drying and purification, but serves as a safety backup in case of failure of the first control loop L1. When the first controller 10 is in the enabled state, the second controller 11 can also remain in the working state, and can continuously receive the process parameters transmitted from the acquisition sensor 12 connected thereto, and the process parameters in the drying container are also transmitted to the first controller 10 at the same time.

[0131] As described in step S102, when the monitoring function of the first control loop L1 is normal and effective, the first controller 10 adjusts the heating power of the gas processing device 13 according to the set process program, or controls the gas processing device 13 to stop working when a dangerous situation occurs. In this process, although the process parameters are also transmitted to the second controller 11, the second controller 11 can maintain a silent standby mode and will not trigger the start and stop of the gas processing device 13.

[0132] When the monitoring function of the first control loop L1 fails, the process parameters in the drying container will change uncontrollably. Once the process parameters exceed the upper threshold limit that can be monitored by the first control loop L1, the process parameters can activate the second controller 11. The second controller 11 can determine that a dangerous situation has occurred and the first control loop L1 has failed to eliminate the dangerous situation. The second controller 11 can directly control the gas processing device 13 to stop working, instead of repeatedly adjusting the heating power of the gas processing device 13.

[0133] Therefore, the gas production control method of the embodiment of the present application helps to reduce or even eliminate dangerous situations in the gas production process and can improve the safety of the gas preparation process.

[0134] Optionally, the gas production control system further includes a control valve disposed on a gas transmission path, and controlling the gas processing device to stop working further includes: controlling the control valve to close.

[0135] Specifically, when executing the aforementioned step S102 or step S103, when the control valve is connected to the first controller 10, the first controller 10 can also close all control valves at different positions in the pipeline to cut off the transmission of gas when the control gas processing device 13 stops working. When the control valve is connected to the second controller 11, the second controller 11 can also close all control valves at different positions in the pipeline to cut off the transmission of gas when the control gas processing device 13 stops working.

[0136] Therefore, the first controller 10 or the second controller 11 can cut off the transmission of gas while cutting off the gas processing device 13 to stop heating, thereby shutting down the entire gas production system and ensuring safety.

[0137] Optionally, step S102 may specifically include:

[0138] In sub-step 1021, when the process parameters meet the first process condition, the first controller 10 triggers the heating circuit 131 to adjust the heating power of the gas processing device 13; when the process parameters meet the second process condition, the first controller 10 controls the gas processing device 13 to stop working.

[0139] Specifically, when the first controller 10 receives the process parameters from the acquisition sensor 12, after comparing with the preset process conditions, if the process parameters meet the first process conditions, the control signal sent by the first controller 10 is a signal for controlling the current of the heating circuit 131, which can adjust the heating power of the gas processing device 13. If the process parameters meet the second process conditions, the control signal sent by the first controller 10 is a signal for shutting down the gas processing device 13, which can control the gas processing device 13 to stop working.

[0140] Step S103 may specifically include:

[0141] Sub-step 1031 , when the process parameter meets the third process condition, the second controller 11 controls the gas processing device 13 to stop working.

[0142] Specifically, the third process condition can be preset in the second controller 11. If the process parameters meet the third process condition, the control signal sent by the second controller 11 is a signal to shut down the gas processing device 13, which can control the gas processing device 13 to stop working.

[0143] Therefore, in combination with the control process of the embodiment of the present application, it can be understood that the first process condition, the second process condition, and the third process condition are successively more stringent, which means that the degree of danger corresponding to the process parameters is successively aggravated. Therefore, when the process parameter exceeds the second process condition and falls into the range of the third process condition, it means that the current first control loop L1 has failed, and the second controller 11 needs to directly shut down the gas processing device 13.

[0144] Illustratively, the first process condition, the second process condition, and the third process condition may be the same as the temperature conditions in the aforementioned embodiment of the gas production system, and will not be described in detail here.

[0145] Alternatively, if Figures 2 to 5As shown, when the heating circuit 13 includes a circuit breaker 1311, a contactor 1312, a power controller 1313, a heating wire 1314, and a safety relay 1315 electrically connected in sequence, the circuit breaker 1311 is electrically connected to the normally closed contact of the safety relay 1315, and the second controller 11 is electrically connected to the coil of the safety relay 1315. In such a gas production system, the second controller controls the gas processing device to stop working in the aforementioned step S103, and can also include: the second controller 11 cuts off the circuit breaker 1311 through the safety relay 1315.

[0146] Specifically, in the heating circuit 13 of the embodiment of the present application, a safety relay 1315 that complies with the SIL safety certification can also be configured and connected. After the second controller 11 is connected to the safety relay 1315, the control signal output by the second controller 11 can be used to control the coil of the safety relay 1315 to lose power, and then the circuit breaker 1311 can be cut off after the normally closed contact of the safety relay 1315 is closed. The safety relay 1315 can improve the reliability of the interlocking control of the circuit breaker 1311 by the second controller 11, and can effectively cut off the heating circuit 13, which helps to eliminate production accidents.

[0147] Alternatively, if Figure 6 As shown in FIG. 1 , the gas processing device 13 further includes a plurality of process towers 132, at least two acquisition sensors 12 are provided in the process towers 132, and the first controller 10 and / or the second controller 11 are electrically connected to the at least two acquisition sensors 12. At this time, step S101 may specifically include:

[0148] Sub-step S1011, obtaining the process parameters transmitted by at least two of the acquisition sensors 12 respectively.

[0149] Sub-step S1012: calibrating the process parameters based on the process parameters transmitted by at least two of the acquisition sensors 12 .

[0150] Specifically, according to the process of the above-mentioned sub-steps S1011 and S1012, at least one of the first controller 10 and the second controller 11 can simultaneously receive process parameters transmitted from different acquisition sensors 12, and the process parameters transmitted by different acquisition sensors 12 can be referenced and verified with each other to reduce the error of the parameters input from one end of the acquisition sensor 12.

[0151] For example, at least two acquisition sensors 12 may be MooN (M out of N) redundant architecture, N represents the total number of channels, which can be the total number of acquisition sensors 12, and M represents the minimum number of channels required to trigger the first controller 10 and / or the second controller 11 to perform a function. For example, when there are two acquisition sensors 12, if a 1oo2 redundant architecture is adopted, when the temperature signal sent by one of the two acquisition sensors 12 meets the corresponding process conditions, the first controller 10 and / or the second controller 11 controls the corresponding operation. If a 2oo2 redundant architecture is adopted, when the temperature signals sent by both acquisition sensors 12 meet the corresponding process conditions, the first controller 10 and / or the second controller 11 controls the corresponding operation. Similarly, the principles of 2oo3 and 2oo4 redundant architectures are to set a decision-making mechanism for the output signal of the acquisition sensor 12, that is, the principle of minority obeys majority, so as to prevent the occurrence of false operations and improve the reliability of the system.

[0152] An embodiment of the present application also provides a gas production control device, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the gas production control method disclosed in the aforementioned embodiment of the present application.

[0153] An embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the gas production control method disclosed in the aforementioned embodiment of the present application is implemented.

[0154] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0155] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A gas production control system, characterized in that: The gas production control system comprises: a first controller, a second controller, a collection sensor and a gas processing device, wherein the gas processing device comprises a heating circuit; The first controller is electrically connected to the acquisition sensor and the heating circuit to form a first control loop; the second controller is electrically connected to the acquisition sensor and the heating circuit to form a second control loop; The acquisition sensor is used to transmit process parameters in the gas production process to the first controller and the second controller; The first controller is used to trigger the heating circuit to adjust the heating power of the gas processing device or control the gas processing device to stop working according to the process parameters; The second controller is used to control the gas processing device to stop working according to the process parameters.

2. The gas production control system according to claim 1, characterized in that: The gas production control system further comprises a control valve disposed on the gas transmission path, wherein the control valve is electrically connected to the first controller and the second controller at the same time; When the first controller or the second controller controls the gas processing device to stop working, it also controls the control valve to close.

3. The gas production control system according to claim 1, characterized in that: The first controller is used to trigger the heating circuit to adjust the heating power of the gas processing device when the process parameter meets the first process condition, and is also used to control the gas processing device to stop working when the process parameter meets the second process condition; The second controller is used to control the gas processing device to stop working when the process parameter meets the third process condition.

4. The gas production control system according to claim 3, characterized in that: The process parameters include temperature T; The first process condition is T1≤T<T2, the second process condition is T2≤T<T3, the third process condition is T3<T, T1 is the first temperature threshold, T2 is the second temperature threshold, and T3 is the third temperature threshold.

5. The gas production control system according to claim 1, characterized in that: The heating circuit comprises a circuit breaker, a contactor, a power controller and a heating wire which are electrically connected in sequence; The circuit breaker is also electrically connected to the second controller, and the power controller is also electrically connected to the first controller.

6. The gas production control system according to claim 5, characterized in that: The gas processing device further comprises a plurality of process towers, each of which is provided with a corresponding heating circuit, and the heating circuit is used to heat the gas in the process tower.

7. The gas production control system according to claim 5, characterized in that: The gas processing device further comprises a plurality of process towers, each of which is provided with the heating wire, and the heating wire is electrically connected to the output end of the same power controller.

8. The gas production control system according to claim 6 or 7, characterized in that: At least two of the acquisition sensors are arranged in the process tower; The first controller and / or the second controller are electrically connected to at least two of the acquisition sensors.

9. A gas production control method, characterized in that: The gas production control method is used for a gas production control system, which includes: a first controller, a second controller, a collection sensor and a gas processing device, wherein the gas processing device includes a heating circuit; the first controller is electrically connected to the collection sensor and the heating circuit to form a first control loop; the second controller is electrically connected to the collection sensor and the heating circuit to form a second control loop; the gas production control method includes: receiving process parameters during gas production; According to the process parameters, the first controller triggers the heating circuit to adjust the heating power of the gas processing device or control the gas processing device to stop working; According to the process parameters, the second controller controls the gas processing device to stop working.

10. The gas production control method according to claim 9, characterized in that: The gas production control system further includes a control valve disposed on a gas transmission path, and the controlling the gas processing device to stop working further includes: controlling the control valve to close.

11. The gas production control method according to claim 9, characterized in that: According to the process parameters, the first controller triggers the heating circuit to adjust the heating power of the gas processing device and control the gas processing device to stop working, including: When the process parameter meets a first process condition, the first controller triggers the heating circuit to adjust the heating power of the gas processing device, and when the process parameter meets a second process condition, the first controller controls the gas processing device to stop working; According to the process parameters, the second controller controls the gas processing device to stop working, including: When the process parameter meets the third process condition, the second controller controls the gas processing device to stop working.

12. The gas production control method according to claim 11, characterized in that: The process parameters include temperature T; The first process condition is T1≤T<T2, the second process condition is T2≤T<T3, the third process condition is T3<T, T1 is the first temperature threshold, T2 is the second temperature threshold, and T3 is the third temperature threshold.

13. A gas production control device, comprising a memory, a processor and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement the gas production control method according to any one of claims 9 to 12.

14. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the gas production control method according to any one of claims 9 to 12 is implemented.

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