Gas production control device

Abstract

The embodiment of the utility model provides a gas production control device which 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 first control loop is used for controlling the heating circuit to adjust the heating power of the gas treatment device or controlling the gas treatment device to stop working; the second controller is electrically connected with the acquisition sensor and the heating circuit to form a second control loop; the second control loop is used for controlling the gas treatment device to stop working. According to the gas production control device disclosed by the embodiment of the invention, dangerous cases in the gas production process can be reduced or even eliminated, and the safety in the gas preparation process 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 device. Background Art

[0002] In the chemical industry, safe production is of paramount importance. Industrial automation control systems can monitor the status of chemical production and, based on dangerous phenomena, promptly trigger corresponding safety protection devices in the control system to activate alarms or shut down the plant.

[0003] For example, sensors usually transmit the collected process parameters to a PLC controller. After the PLC controller analyzes and processes the parameters, if it determines that a dangerous phenomenon occurs, it can issue an alarm signal or trigger the disconnection of the connected load circuit to stop the process equipment.

[0004] However, the control devices used in existing industrial automation control systems utilize 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. Utility Model Content

[0005] An embodiment of the present application provides a gas production control device to solve the problem that when any hardware failure occurs in the PLC control loop of the existing control device, the alarm or shutdown will fail, thereby increasing the risk of production safety accidents.

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

[0007] An embodiment of the present application provides a gas production control device, the gas production control device 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, and the first control loop is used to control the heating circuit to adjust the heating power of the gas processing device or control the gas processing device to stop working;

[0009] The second controller is electrically connected to the collection sensor and the heating circuit to form a second control loop, and the second control loop is used to control the gas processing device to stop working.

[0010] Optionally, the heating circuit includes a circuit breaker, a contactor, a power controller and the like electrically connected in sequence.

[0011] and heating wire;

[0012] The circuit breaker is also electrically connected to the second controller, and the power controller is also electrically connected to the first controller.

[0013] Optionally, the heating circuit further includes a safety relay;

[0014] The circuit breaker is electrically connected to the normally closed contact of the safety relay, the second controller is electrically connected to the coil of the safety relay, and the second controller controls the on and off of the circuit breaker through the interlocking of the safety relay.

[0015] Optionally, the normally open contact of the safety relay is electrically connected to a power supply line between the power supply of the power controller and the power controller;

[0016] The second controller controls the start and stop of the power controller through the interlocking of the safety relay.

[0017] Optionally, the gas production control device further includes a temperature controller;

[0018] The signal input terminal of the temperature controller is electrically connected to the acquisition sensor, the alarm output terminal of the temperature controller is electrically connected to the first controller, and the normally open contact of the safety relay is electrically connected to the power supply line between the temperature controller and the power controller;

[0019] The second controller controls the on / off between the temperature controller and the power controller through the interlocking control of the safety relay.

[0020] Optionally, the gas production control device further includes an ammeter electrically connected to the heating circuit, the ammeter is also electrically connected to the first controller, and the ammeter is used to monitor the current signal in the heating circuit.

[0021] Optionally, there are multiple heating circuits, and the multiple heating circuits are arranged in parallel.

[0022] Optionally, the heating wires are provided in multiple groups, and each group of the heating wires is provided in a different production process;

[0023] A plurality of groups of heating wires are electrically connected to the same power controller.

[0024] Optionally, the first controller and / or the second controller are electrically connected to at least two of the acquisition sensors.

[0025] In the gas production control device of the embodiment of the present application, an additional second control loop is used as a redundant backup of the first control loop, which 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

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 A schematic diagram showing the hardware composition of a gas production control device according to an embodiment of the present invention is shown;

[0028] Figure 2 shows an electrical wiring diagram of a first gas production control device according to an embodiment of the present invention;

[0029] Figure 3 shows an electrical wiring diagram of a second gas production control device according to an embodiment of the present invention;

[0030] Figure 4 shows an electrical wiring diagram of a third gas production control device according to an embodiment of the present invention;

[0031] Figure 5 A schematic diagram of electrical wiring of a fourth gas production control device in an embodiment of the present invention is shown.

[0032] Description of the accompanying figures:

[0033] 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, safety relay 1315, temperature controller 1316, ammeter 1317. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] It should be understood that references throughout this specification to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout this specification do not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0036] In various embodiments of the present application, it should be understood that the order of execution of the following processes does not necessarily mean the order in which they are executed. The order in which the processes are executed should be determined by their functions and internal logic, and should not be determined by the order in which they are executed.

[0037] It does not constitute any limitation on the implementation process of the embodiments of the present application.

[0038] During the gas preparation process in the chemical industry, the use of gas production control devices to monitor the gas production process in real time can effectively prevent production safety accidents. Some gas preparation processes involve heating treatment processes (for example, drying or deoxidation), which will form a high-temperature environment of 200°C to 300°C. High temperatures can easily cause hardware failures in the gas production control device, posing safety risks. In addition, during gas preparation, the gas production control device often needs to take different response measures according to the different stages of gas preparation. Therefore, the device needs to frequently adjust the control strategy, which can easily lead to inaccurate device control strategies, causing safety hazards to the device and inducing safety risks.

[0039] Therefore, the embodiment of the present application designs a gas production control device 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.

[0040] Reference Figure 1 , shows a schematic diagram of the hardware composition of a gas production control device provided in an embodiment of the present application, the gas production control device includes a first controller 10, a second controller 11, a collection sensor 12 and a gas processing device 13, the gas processing device 13 includes a heating circuit 131;

[0041] The first controller 10 is electrically connected to the acquisition sensor 12 and the heating circuit 13 to form a first control loop L1. The first control loop L1 is used to control 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;

[0042] The second controller 11 is electrically connected to the collection sensor 12 and the heating circuit 131 to form a second control loop L2 . The second control loop L2 is used to control the gas processing device 13 to stop working.

[0043] Figure 1 This is a schematic diagram of the hardware composition of a gas production control device according to an embodiment of the present application. The gas production control device shown in the figure serves as an electronic control device in a gas production control system.

[0044] This gas production control device 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 gas production control device shown in the diagram 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.

[0045] Combine Figure 1 As shown in FIG. 1 , the gas production control device of the embodiment of the present application may include: two independent controllers, a collection sensor 12 and a gas processing device 13. The two independent controllers are respectively

[0046] The first controller 10 and the second controller 11 are control modules with data processing capabilities, and can be based on processor chips such as CPUs, MCUs, and FPGAs. The data acquisition sensor 12 in the gas production control device is a production data acquisition device within the device, capable of collecting at least one process parameter, such as temperature and pressure, during the gas production process. The specific function of the data acquisition sensor 12 is determined by the function 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 gas production process.

[0047] To facilitate the description of the gas production control device disclosed in the embodiments of the present application, the following embodiments will be described using the gas production control device for hydrogen processing as an example.

[0048] Combine Figure 1As shown in FIG. 1 , the first controller 10 is electrically connected to the acquisition sensor 12, which is also electrically connected to the heating circuit 131. The three connections form the first control loop L1 shown in the figure. The second controller 11 is electrically connected to the acquisition sensor 12, which is also electrically connected to the same heating circuit 131. The three connections form the second control loop L2 shown in the figure.

[0049] It should be noted that in the embodiment of the present application, the acquisition sensor 12 connected to the first controller 10 and the acquisition sensor 12 connected to the second controller 11 can be the same sensor, that is, the two controllers share the same sensor to collect process parameters. Alternatively, in the embodiment of the present application, the acquisition sensor 12 connected to the first controller 10 and the acquisition sensor 12 connected to the second controller 11 are two sensors of different performance levels, and the first controller 10 and the second controller 11 each collect process parameters through the corresponding sensor.

[0050] Specifically, the second controller 11 in the second control loop L2 has a higher safety level than the first controller 10 in the first control loop L1. This makes the second control loop L2 more reliable in terms of safety monitoring than the first control loop L1. This configuration allows the first control loop L1 to more efficiently handle fault recovery in the gas production control system, minimizing interruptions to the production process. It also allows the second control loop L2 to take immediate action upon receiving a danger signal to put the gas production control system into a safe state. This helps reduce or even eliminate hazards in the gas production process, while avoiding the shortened lifespan and reduced production of the gas production control system caused by frequent shutdowns, thereby improving safety during the gas preparation process.

[0051] When the gas processing device 13 is used to process the produced hydrogen, its internal heating circuit 131 dries the hydrogen. Furthermore, the acquisition sensor 12 collects the process parameters within the drying container and transmits them via signal lines to the first controller 10 and the second controller 11. During normal daily production activities, the first controller 10 is enabled and controls the heating power of the gas processing device 13 based on the real-time process parameters. For example, when the temperature within the drying container is below a preset value, the current in the heating circuit 131 can be increased to increase the heating power of the gas processing device 13. When the temperature within the drying container is above a preset value, the current in the heating circuit 131 can be decreased to reduce the heating power of the gas processing device 13.

[0052] Furthermore, the first controller 10 can also control the gas processing device 13 to stop working. For example, if 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, causing the heating circuit 131 in the gas processing device 13 to stop heating and close the control valve in the pipeline of the gas production control system.

[0053] 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.

[0054] It should be noted that any hardware component of the first controller 10, the collection sensor 12, and the heating circuit 131 in the first control loop described above has a certain probability of failure. A failure of the collection sensor 12 could cause the first controller 10 to erroneously determine that it is unable to trigger the gas processing device 13 to stop operating. A failure of the first controller 10 could result in the inability to issue accurate and effective control signals, and a failure of the gas processing device 13 could result in the inability to stop the device from operating.

[0055] Therefore, in the embodiment of the present application, based on the above-mentioned first control loop L1, another control loop is added to the gas production control device, namely the second control loop L2 shown in the figure. Unlike the first control loop L1, the second control loop L2 controls the gas processing device 13 not for the purpose of drying and purification, but as a safety backup in the event of a 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 operation and can continuously receive process parameters transmitted from the acquisition sensor 12 connected to it. The process parameters in the drying container are also transmitted to the first controller 10.

[0056] When the monitoring function of the first control loop L1 is functioning normally, the first controller 10 adjusts the heating power of the gas processing device 13 according to the set process program or stops the gas processing device 13 in the event of a dangerous situation. During this process, although the process parameters are also transmitted to the second controller 11, the second controller 11 can remain in silent standby mode and will not trigger the start or stop of the gas processing device 13.

[0057] 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 that the first control loop L1 has failed to eliminate the dangerous situation. In other words, under the intervention of the first control loop L1, the heating circuit 131 in the gas production control device cannot be effectively disconnected to stop heating. Or, more dangerously, the first controller 10 cannot stop heating circuit 131 and cannot close the control valve in the pipeline. In this case, the second controller 11 can directly control the gas processing device 13 to stop working, rather than repeatedly adjusting the heating power of the gas processing device 13.

[0058] Therefore, in the gas production control device of the embodiment of the present application, an additional second control loop is used as a redundant backup of the first control loop, which 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.

[0059] In one embodiment, the first controller 10 and the second controller 11 are configured with different process conditions. When the first controller 10 receives process parameters from the acquisition sensor 12 and compares them with the preset process conditions, if the process parameters meet the first process condition, the first controller 10 issues a control signal to control the current of the heating circuit 131, thereby adjusting the heating power of the gas processing device 13. If the process parameters meet the second process condition, the first controller 10 issues a control signal to shut down the gas processing device 13, thereby stopping the operation of the gas processing device 13.

[0060] A third process condition may be pre-set 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 , thereby controlling the gas processing device 13 to stop working.

[0061] The first controller 10 and the second controller 11 both have the function of stopping the gas processing device 13. It is necessary to avoid conflicts in the control logic of the two controllers and to ensure the stability of the heating power adjustment of the gas processing device 13. Therefore, the first controller 10 and the second controller 11 have relatively independent control logic, which can ensure the stable operation of the gas production system, avoid control logic conflicts, and reduce the safety risks of system operation.

[0062] Therefore, in conjunction with the control process of the embodiment of the present application, it can be understood that the first, second, and third process conditions become increasingly stringent, indicating that the corresponding risk levels of the process parameters increase in sequence. Therefore, when the process parameters exceed the second process conditions and fall within the range of the third process conditions, it indicates that the first control loop L1 has failed, and the second controller 11 needs to directly shut down the gas processing device 13.

[0063] When the acquisition sensor 12 is a temperature sensor, in this gas production control device, the process parameters include temperature T. Temperature T is the real-time temperature acquired by the acquisition sensor 12 and reflects the real-time ambient temperature of the drying container where the gas is located. Three temperature thresholds can be set in the gas production control device: a first temperature threshold T1, a second temperature threshold T2, and a third temperature threshold T3, where 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 and second process conditions can be set in the first controller 10, and the third process condition can be set in the second controller 11. The temperature range [T1, T2) represents the temperature conditions required for gas drying. The temperature range [T2, T3) represents the temperature conditions that the first controller 10 determines to have a low safety risk after the temperature in the drying container increases. When the temperature exceeds T3, i.e., the temperature in the drying container continues to rise, the second controller 11 determines to have a high safety risk.

[0064] Furthermore, in some embodiments, the first control loop L1 may be a PLC control loop, and the second control loop L2 may be a SIS (Safety Instrumented System) control loop or a DCS (Distributed Control System) control loop, which is more specialized than the PLC control loop and specifically used for industrial production safety monitoring. For example, when the second control loop L2 is a SIS control loop, the second controller 11 may be a SIS controller. In this case, the temperature sensor 12 and other hardware used in the second control loop L2 may be high-reliability power electronic devices that meet SIL certification. Consequently, the second control loop L2 has a lower failure rate than the first control loop L1.

[0065] Optionally, refer to Figures 2 to 5 In any schematic, the heating circuit 13 includes a circuit breaker 1311, a contactor 1312, a power controller 1313 and a heating wire 1314 which are electrically connected in sequence;

[0066] 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 .

[0067] Specifically, if Figures 2 to 5 As shown in any schematic diagram of the embodiment of the present application, the heating circuit 131 may include a circuit breaker 1311, a contactor 1312, a power controller 1313 and a heating wire 1314, which 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 can no longer be maintained, and the heating circuit 131 can also be stopped.

[0068] The circuit breaker 1311 is also electrically connected to the second controller 10. The second controller 10 can control the heating circuit 131 by controlling the operating state of the circuit breaker 1311, for example, to stop the gas processing device 13. The power controller 1313 is also electrically connected to the first controller 10. The first controller 10 can control the heating circuit 131 by controlling the output power of the power controller 1313, for example, to adjust the heating power or stop the gas processing device 13.

[0069] Optionally, refer to Figures 2 to 5 In any schematic, the heating circuit 13 further includes a safety relay 1315;

[0070] 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 .

[0071] 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 including a circuit breaker 1311, a contactor 1312, a power controller 1313, and a heating wire 1314 electrically connected in sequence, the heating circuit 13 may also be configured to connect a safety relay 1315 that complies with 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. Then, the normally closed contact of the safety relay 1315 is closed to disconnect the circuit breaker 1311. The safety relay 1315 can improve the reliability of the interlocking control of the circuit breaker 1311 by the second controller 11, can effectively disconnect the heating circuit 13, and help eliminate production accidents.

[0072] 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;

[0073] The second controller 11 controls the start and stop of the power controller 1313 through the safety relay 1315 .

[0074] Specifically, in one embodiment, Figures 2 to 3 As shown in any of the schematic diagrams, the normally open contacts of the safety relay 1315 are 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 contacts of the safety relay 1315 are disconnected, which can 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. 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.

[0075] Optionally, refer to Figure 4 or Figure 5 , the gas production control device also includes a temperature controller 1316;

[0076] 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;

[0077] The second controller 11 controls the on / off between the temperature controller 1316 and the power controller 1313 through the safety relay 1315 .

[0078] Specifically, in one embodiment, Figure 4 or Figure 5 As shown in FIG. 1 , the gas production control device further includes a temperature controller 1316. The signal input terminal of the temperature controller 1316 is electrically connected to the data acquisition sensor 12, and the alarm output terminal of the temperature controller 1316 is electrically connected to the first controller 10. The temperature controller 1316 is also electrically connected to the power controller 1313. The data acquisition sensor 12 transmits real-time temperature parameters to the temperature controller 1316. The temperature controller 1316 can determine whether to send a power adjustment signal to the power controller 1313 or transmit an alarm signal to the first controller 10 based on the process conditions satisfied by the temperature parameters.

[0079] In this gas production control device, 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, which can 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 cannot be maintained, and the heating circuit 131 can also stop working.

[0080] Optionally, refer to Figures 2 to 5 In any embodiment, the gas production control device further includes an electrical connection

[0081] An ammeter 1317 connected to the heating circuit 131 is also electrically connected to the first controller 10 . The ammeter 1317 is used to monitor the current signal in the heating circuit 131 .

[0082] 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 anywhere 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, ammeter 1317 is located between contactor 1312 and power controller 1313. Ammeter 1317 can monitor the current signal in heating circuit 131 and transmit the current signal to first controller 10, which can then determine whether the corresponding heating circuit 131 is functioning properly. Specifically, the current of each phase line can be monitored to accurately determine which phase line the fault has occurred in.

[0083] Optionally, there are multiple heating circuits 131, and the multiple heating circuits 131 are arranged in parallel.

[0084] Specifically, in one embodiment, the gas processing device 13 of the embodiment of the present application also includes multiple process towers, which can be drying towers or deoxygenation towers to correspond to different production processes. For example, in the process of hydrogen processing, since the deoxygenation tower in the hydrogen gas processing 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. The drying tower adopts an adsorption method, using molecular sieves as adsorbents. The adsorption of molecular sieves 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 processing 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, the number of drying towers can be further increased on this basis to shorten the continuous working time of a single drying tower to facilitate the maintenance of the gas processing device 13.

[0085] Regardless of which process the process tower is used in, the process tower used in the corresponding production process is respectively provided with a corresponding heating circuit 131. At this time, the number of process towers and heating circuits 131 remains consistent and corresponds one to one. Multiple heating circuits 131 are arranged in parallel. Based on the circuit connection relationship of the aforementioned embodiment, the first controller 10 and the second controller 11 can respectively control the operation of each heating circuit 131, and each heating circuit 131 can heat the gas in the corresponding process tower.

[0086] Optionally, refer to Figure 3 or Figure 5 The heating wires 1314 are divided into multiple groups, and the multiple groups of heating wires 1314 are electrically connected to the same power controller 1313.

[0087] Specifically, if Figure 3 or Figure 5 As shown, the embodiment of the present application also provides another gas processing device 13 including multiple process towers, where one process tower corresponds to one production process. Compared with the previous embodiment, the difference is that each of the multiple process towers is provided with a heating wire 1314. In this case, the number of process towers and heating wires 1314 remains consistent and corresponds one to one, and multiple groups of heating wires 1314 are all electrically connected to the output end of the same power controller 1313. In this gas processing device 13, multiple heating wires 1314 are commonly connected to a group of power controllers 1313, circuit breakers 1311, and contactors 1312, which can not only control the temperature in each process tower, but also reduce the reuse of power electronic components, thereby reducing circuit costs.

[0088] Optionally, the first controller 10 and / or the second controller 11 are electrically connected to at least two acquisition sensors 12 .

[0089] Specifically, in one embodiment, at least two acquisition sensors 12 are provided in any process tower. 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.

[0090] For example, at least two acquisition sensors 12 may be MooN (M out of N) redundant architecture, where 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 will control 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 will control the corresponding operation. Similarly, the principles of both 2oo3 and 2oo4 redundant architectures set a decision-making mechanism for the output signals of the acquisition sensors 12, namely, the principle of majority rule, thereby preventing malfunctions and improving system reliability.

[0091] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0092] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

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

2. The gas production control device according to claim 1, characterized in that: The heating circuit includes 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.

3. The gas production control device according to claim 2, characterized in that: The heating circuit also includes a safety relay; The circuit breaker is electrically connected to the normally closed contact of the safety relay, the second controller is electrically connected to the coil of the safety relay, and the second controller controls the on and off of the circuit breaker through the interlocking of the safety relay.

4. The gas production control device according to claim 3, characterized in that: The normally open contact of the safety relay is electrically connected to the power supply line between the power supply of the power controller and the power controller; The second controller controls the start and stop of the power controller through the interlocking of the safety relay.

5. The gas production control device according to claim 3, characterized in that: The gas production control device also includes a temperature controller; The signal input terminal of the temperature controller is electrically connected to the acquisition sensor, the alarm output terminal of the temperature controller is electrically connected to the first controller, and the normally open contact of the safety relay is electrically connected to the power supply line between the temperature controller and the power controller; The second controller controls the on / off between the temperature controller and the power controller through the interlocking control of the safety relay.

6. The gas production control device according to claim 2, characterized in that: The gas production control device further includes an ammeter electrically connected to the heating circuit. The ammeter is also electrically connected to the first controller. The ammeter is used to monitor the current signal in the heating circuit.

7. The gas production control device according to claim 2, characterized in that: There are multiple heating circuits, and the multiple heating circuits are arranged in parallel.

8. The gas production control device according to claim 2, characterized in that: There are multiple groups of heating wires, and the multiple groups of heating wires are electrically connected to the same power controller.

9. The gas production control device according to claim 7 or 8, characterized in that: The first controller and / or the second controller are electrically connected to at least two of the acquisition sensors.

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