Gas blower, gas purification and coking DCS system undisturbed control method based on general control DCS system

Abstract

The invention discloses a gas blower, gas purification and coking DCS system undisturbed control method based on a master control DCS system, and relates to the field of industrial automation control. In the process that the master control DCS system is automatically controlled through the subsystems, the master control DCS system can track and adjust the control signals of the subsystems in real time, and the control precision and the response speed are ensured. For example, for a gas blower DCS system, a first master control tracking module tracks a gas blower control signal ABHZ8103A. VALUE of the gas blower DCS system, optimizes and adjusts the gas blower control signal through a blower PIDEX control module, and outputs a hard wiring signal PV81003A. IN to the gas blower DCS system based on the adjusted signal. Therefore, the front suction force of the primary cooler is accurately controlled, and the gas purification efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of industrial automation control, and in particular to a disturbance-free control method for gas blowers, gas purification, and coking DCS systems based on a central control DCS system. Background Technology

[0002] With increasingly stringent environmental protection requirements, the coking industry has set higher standards for the refined control of coke oven operations and the effectiveness of smokeless coal charging. To improve automation, a new coke oven gas collecting pipe pressure optimization control DCS system (i.e., a central control DCS system, which optimizes control signals) was added without dismantling the existing coking DCS system, gas purification DCS system, and gas blower DCS system. This central control DCS system indirectly controls individual actuators by controlling the existing systems. While this system aims to improve process stability through advanced control strategies, it also introduces the challenge of switching control signals between the old and new control systems operating in parallel.

[0003] Because the old and new systems share the same set of actuators (including the coke oven gas collecting pipe pressure regulating flap, the high-pressure ammonia water pump frequency converter, and the gas blower frequency converter), their control output signals need to be switched between the two systems. Initially, a hard switching method using a changeover switch was adopted to achieve this. However, due to differences in PID parameter settings and control logic between the old and new systems, problems such as violent actuator movements and large fluctuations in equipment output occurred during the switching process. This severely affected the stability of the blower speed, gas collecting pipe pressure, and high-pressure ammonia water pressure, thereby jeopardizing production safety and environmental compliance.

[0004] Furthermore, the switchover between old and new systems involves the coordinated operation of multiple control systems, control loops, and operational positions. The switchover process under both normal and abnormal conditions is complex and difficult to coordinate, making it challenging to guarantee the synchronization and timeliness of the switchover process and potentially leading to prolonged periods of system control failure. Therefore, there is an urgent need for a simple, responsive, and smooth switchover control method that ensures a seamless transition between old and new systems, guaranteeing that the operation of the old system is not affected during the commissioning of the new system and ensuring production continuity and safety. Summary of the Invention

[0005] To address the issues of violent actuator movements and large fluctuations in equipment output during the switching between old and new systems, this invention proposes a disturbance-free control method for a gas blower DCS system based on a central control DCS system. The central control DCS system includes: a first switching button module, a first central control tracking module, and a blower PIDEX control module. Figure 1 The gas blower DCS system includes: a first mode switching module ( Figure 2 ), blower tracking module ( Figure 3 ) and blower PIDE control module ( Figure 4 The blower PIDE control module includes: a first AND-OR-NOT unit BOR_01, a selection unit, and a control unit PIDE_1PRC_1401.

[0006] The disturbance-free control method includes:

[0007] Switching from the automatic control mode of the gas blower DCS system to the automatic control mode of the gas blower through the gas blower DCS system, specifically includes:

[0008] The first switching button module generates a mode switching signal SupCon_BOOL_OUT[1]. At this time, the value of the mode switching signal SupCon_BOOL_OUT[1] is 1. The first mode switching module connects to the mode switching signal SupCon_BOOL_OUT[1] and triggers the manual operation pin OperaManualReq of the control unit PIDE_1PRC_1401 in the gas blower DCS system based on the signal, so that the gas blower DCS system enters the manual control mode. At the same time:

[0009] The first master control tracking module tracks the gas blower control signal AB_HZ8103A.VALUE of the gas blower DCS system, and outputs a hard-wired signal PV_81003A.IN to the gas blower DCS system through the blower PIDEX control module.

[0010] The blower tracking module tracks the hard-wired signal PV_81003A.IN to obtain the gas blower tracking control signal FromSup_1PV_1401, and when it receives the mode switching signal SupCon_BOOL_OUT[1], it assigns the gas blower tracking control signal FromSup_1PV_1401 to the blower speed regulation signal PV_1401A.

[0011] When the first AND-OR-NOT unit BOR_01 receives the mode switching signal SupCon_BOOL_OUT[1], it outputs the value of the signal to the selection unit. The selection unit assigns the fan speed regulation signal PV_1401A to the speed control signal speed_1 based on the value of the signal and sends it to the manual control pin CVOper of the control unit PIDE_1PRC_1401.

[0012] The control unit PIDE_1PRC_1401 generates the blower-to-inverter signal H02_D1_1PV_1401 by using the signal input through the manual control pin CVOper via its execution control pin CVEU, and controls the blower inverter through this signal.

[0013] Furthermore, the first mode switching module includes:

[0014] The second AND-OR-NOT unit BOR_02 and the rising edge triggered single pulse module OSRI_02;

[0015] When the second AND-OR-NOT unit receives the mode switching signal SupCon_BOOL_OUT[1], it triggers the single pulse module OSRI_02 to output the value of the signal on the rising edge.

[0016] The rising edge triggered single pulse module OSRI_02 triggers the manual operation pin OperaManualReq of the control unit PIDE_1PRC_1401 in the gas blower DCS system based on the value of the signal, so that the gas blower DCS system enters the manual control mode.

[0017] Furthermore, the gas blower DCS system also includes:

[0018] Second mode switching module ( Figure 5 The method includes: a sixth AND-OR-NOT unit BOR_06 and a falling-edge triggered single-pulse module OSFI_02; the disturbance-free control method further includes:

[0019] Switching from the mode where the central control DCS system automatically controls the gas blower via the gas blower DCS system to the mode where the gas blower DCS system automatically controls the gas blower, specifically includes:

[0020] The mode switching signal SupCon_BOOL_OUT[1] is generated by the first switching button module. At this time, the value of the mode switching signal SupCon_BOOL_OUT[1] is 0.

[0021] When the sixth AND-OR-NOT unit BOR_06 receives the mode switching signal SupCon_BOOL_OUT[1], it outputs the value of the signal to the falling edge triggered single pulse module OSFI_02; the falling edge triggered single pulse module OSFI_02 triggers the automatic operation pin OperaAutoReq of the control unit PIDE_1PRC_1401 in the gas blower DCS system based on the value of the signal, so that the gas blower DCS system enters the automatic control mode;

[0022] In automatic control mode, the control unit PIDE_1PRC_1401 of the gas blower DCS system performs PID adjustment based on the gas suction force H02_D1_PRC_1401A before the primary cooler and its set value, and on the most recent hard-wired signal PV_81003A.IN output by the main control DCS system. The control unit PIDE_1PRC_1401 generates the blower-to-inverter signal H02_D1_1PV_1401 through the execution control pin CVEU, and controls the blower inverter through this signal.

[0023] Furthermore, in the mode where the central control DCS system automatically controls the gas blower through the gas blower DCS system, and in the mode where the gas blower DCS system automatically controls the gas blower:

[0024] The first master control tracking module continuously tracks the gas blower control signal AB_HZ8103A.VALUE of the gas blower DCS system;

[0025] In the automatic control mode of the gas blower DCS system:

[0026] The blower tracking module stops tracking the hardwired signal PV_81003A.IN.

[0027] This invention also proposes a disturbance-free control method for a gas purification DCS system based on a central control DCS system. The central control DCS system includes: a second switching button module, a second central control tracking module, and a frequency converter PIDEX control module. Figure 6 The gas purification DCS system includes: a mode switching module ( Figure 7 ), frequency converter tracking module ( Figure 8 ) and the frequency converter PIDE control module ( Figure 9 The method includes:

[0028] Switching from the automatic control mode of the high-pressure ammonia pump frequency converter by the gas purification DCS system to the automatic control mode of the high-pressure ammonia pump frequency converter by the central control DCS system through the gas purification DCS system specifically includes:

[0029] The second switching button module generates a mode switching signal SupCon_BOOL_OUT[1]. At this time, the value of the mode switching signal SupCon_BOOL_OUT[1] is 1. The mode switching module connects to the mode switching signal SupCon_BOOL_OUT[1] and sets the value of the automatic operation pin ProgAutoReq in the PIDE_PRC1302A of the frequency converter PIDE control module to 0 based on the signal, so that the gas purification DCS system enters the manual control mode. At the same time:

[0030] The second master control tracking module tracks the inverter control signal AB_HZ8104A.VALUE of the gas purification DCS system, and outputs a hard-wired signal PV_81004A.IN to the gas purification DCS system through the inverter PIDEX control module;

[0031] The inverter tracking module tracks the hard-wired signal PV_81004A.IN to obtain the inverter tracking control signal Sup_PV_1302A. When it receives the mode switching signal SupCon_BOOL_OUT[1], it assigns the inverter tracking control signal Sup_PV_1302A to the inverter adjustment signal PRC_1302A_CVPROM and sends the inverter adjustment signal to the program control pin CVProg of the inverter PIDE control module PIDE_PRC1302A.

[0032] The PIDE control module PIDE_PRC1302A of the frequency converter uses the received value of the program control pin CVProg to generate the frequency modulation signal PV_1302A, and controls the high-pressure ammonia pump frequency converter through this signal.

[0033] Furthermore, the disturbance-free control method further includes:

[0034] Switching the mode of the central control DCS system automatically controlling the high-pressure ammonia pump frequency converter through the gas purification DCS system to the mode of the gas purification DCS system automatically controlling the high-pressure ammonia pump frequency converter specifically includes:

[0035] The mode switching signal SupCon_BOOL_OUT[1] is generated by the second switching button module. At this time, the value of the mode switching signal SupCon_BOOL_OUT[1] is 0.

[0036] The mode switching module accesses the mode switching signal SupCon_BOOL_OUT[1], and based on this signal, sets the value of the automatic operation pin ProgAutoReq in the PIDE_PRC1302A of the frequency converter PIDE control module to 1, so that the gas purification DCS system enters the automatic control mode.

[0037] In automatic control mode, the PIDE control module PIDE_PRC1302A of the gas purification DCS system performs PID adjustment based on the outlet pressure PRC_1302A of the high-pressure ammonia pump and its set value, and on the most recent hard-wired signal PV_81004A.IN output by the main control DCS system. The frequency modulation signal PV_1302A is generated through the execution control pin CVEU of the PIDE control module PIDE_PRC1302A, and the outlet pressure of the high-pressure ammonia pump frequency converter is controlled by this signal.

[0038] Furthermore, in the mode where the central control DCS system automatically controls the high-pressure ammonia pump frequency converter through the gas purification DCS system, and in the mode where the gas purification DCS system automatically controls the high-pressure ammonia pump frequency converter:

[0039] The second master control tracking module continuously tracks the inverter control signal AB_HZ8104A.VALUE of the gas purification DCS system;

[0040] In the automatic control mode of the high-pressure ammonia water pump frequency converter in the coal gas purification DCS system:

[0041] The frequency converter tracking module stops tracking the hard-wired signal PV_81004A.IN.

[0042] This invention also proposes a disturbance-free control method for a coking DCS system based on a central control DCS system. The central control DCS system includes: a third switching button module, a third central control tracking module, and a flip-board PIDEX control module. Figure 10 The coking DCS system includes: a mode switching module ( Figure 11 ), flip-board tracking module ( Figure 12 ) and the flip-board PIDE control module ( Figure 13 The method includes:

[0043] Switching from the automatic control mode of the coking DCS system to the automatic control mode of the coking oven gas collecting pipe pressure regulating flap to the mode where the central control DCS system controls the coking oven gas collecting pipe pressure regulating flap via the coking DCS system, specifically includes:

[0044] The mode switching signal Supcon_Wire is generated by the third switching button module. At this time, the value of the mode switching signal Supcon_Wire is 1. The mode switching module receives the mode switching signal Supcon_Wire and sets the value of the automatic operation pin ProgAutoReq in the flip-board PIDE control module PIDE_05 to 0 based on this signal, so that the coking DCS system enters the manual control mode; at the same time:

[0045] The third master control tracking module tracks the flap control signal SUP_AB_JLFB1.VALUE of the coking DCS system, and outputs a hard-wired signal PV_81001A.IN to the coking DCS system through the flap PIDEX control module.

[0046] The flip-board tracking module tracks the hard-wired signal PV_81001A.IN to obtain the flip-board tracking control signal YI_PZ_10A_SUPCON. When it receives the mode switching signal Supcon_Wire, it assigns the flip-board tracking control signal YI_PZ_10A_SUPCON to the flip-board adjustment signal YI_PRC_10A_MAMUAL_SP and sends the flip-board adjustment signal to the program control pin CVProg of the flip-board PIDE control module PIDE_05.

[0047] The execution control pin CVEU of the PIDE_05 control module of the flapper uses the received value of the program control pin CVProg to generate the adjustment signal YI_PRC_10A_CVEU of the coke oven gas collecting pipe pressure regulating flapper, and outputs the signal to the regulating actuator of the coke oven gas collecting pipe pressure regulating flapper.

[0048] Furthermore, the disturbance-free control method further includes:

[0049] Switching the mode of the central control DCS system automatically controlling the pressure regulating flap of the coke oven gas collecting pipe through the coking DCS system to the mode of the coking DCS system automatically controlling the pressure regulating flap of the coke oven gas collecting pipe specifically includes:

[0050] The mode switching signal Supcon_Wire is generated by the third switching button module. At this time, the value of the mode switching signal Supcon_Wire is 0.

[0051] The mode switching module receives the mode switching signal Supcon_Wire and sets the value of the automatic operation pin ProgAutoReq in the flip-board PIDE control module PIDE_05 to 1 based on the signal, so that the coking DCS system enters the automatic control mode.

[0052] In automatic control mode, the PIDE_05 flap control module of the coking DCS system performs PID adjustment based on the coke oven gas collecting pipe pressure Y1_PRC_10A and its set value, and on the most recent hard-wired signal PV_81001A.IN output by the main control DCS system. The adjustment signal YI_PRC_10A_CVEU of the coke oven gas collecting pipe pressure regulating flap is generated through the execution control pin CVEU of the flap control module PIDE_05, and the signal is output to the regulating actuator of the coke oven gas collecting pipe pressure regulating flap.

[0053] Furthermore, in the mode where the central control DCS system automatically controls the pressure regulating flap of the coke oven gas collecting pipe through the coking DCS system, and in the mode where the coking DCS system automatically controls the pressure regulating flap of the coke oven gas collecting pipe:

[0054] The third master control tracking module always tracks the flap control signal SUP_AB_JLFB1.VALUE of the coking DCS system;

[0055] In the mode of automatic control of the coke oven gas collecting pipe pressure regulating flap in the coking DCS system:

[0056] The flip-board tracking module stops tracking the hardwired signal PV_81001A.IN.

[0057] Compared with the prior art, the present invention has at least the following beneficial effects:

[0058] (1) In this invention, the first switching button module in the master control DCS system generates a mode switching signal (SupCon_BOOL_OUT[1]). When the signal value is 1, the mode of the gas blower DCS system is switched to be controlled by the master control DCS system. At this time, the first mode switching module receives and triggers the manual operation pin (OperManualReq) of the gas blower PIDE control module based on this signal, so that the gas blower DCS system enters the manual mode. At the same time, the first master control tracking module of the master control DCS system tracks the control signal (AB_HZ8103A.VALUE) of the gas blower DCS system and sends a hard-wired signal (PV_81003A.IN) to the gas blower DCS system through the blower PIDEX control module. Within the gas blower DCS system, the blower tracking module updates the blower speed control signal (PV_1401A) based on the received hard-wired signal. This signal is then assigned to the speed control signal (speed_1) via a selection unit, and finally output to the blower frequency converter through the manual control pin (CVOper) of the control unit PIDE_1PRC_1401. This design ensures a seamless, uninterrupted transition between the old and new control systems, whether during normal production or in emergency situations, guaranteeing production continuity and stability.

[0059] (2) When the invention needs to switch back to the independent control mode of the gas blower DCS system, the first switching button module generates a mode switching signal (SupCon_BOOL_OUT[1]), at which time the signal value is 0. After receiving this signal, the sixth AND-OR-NOT unit (BOR_06) outputs a signal value to the single pulse module (OSFI_02) triggered by the falling edge, triggering the automatic operation pin (OperAutoReq) of the gas blower PIDE control module (PIDE_1PRC_1401), so that the gas blower DCS system resumes the automatic control mode. During this process, the control unit of the gas blower DCS system performs PID adjustment based on the gas suction force (HD2_D1_PRC_1401A) in front of the primary cooler and its set value, as well as the hard-wired signal (PV_81003A.IN) output by the main control DCS system most recently, and generates a new control signal to output to the blower frequency converter. This mechanism ensures a smooth and uninterrupted transition during the switching process, avoiding system fluctuations and drastic equipment movements caused by the switch, thus guaranteeing the continuity and stability of the production process. It also improves the reliability and flexibility of the entire control system, making operation simpler and reducing the risk of human intervention. Furthermore, regardless of the control mode, the central control tracking module always tracks the control signals of the gas blower DCS system, further enhancing system stability and response speed.

[0060] (3) This invention provides a method for non-disruptive control of a coal gas purification DCS system based on a central control DCS system. A mode switching signal (SupCon_BOOL_OUT[1]) is generated by the second switching button module. When the signal value is 1, the coal gas purification DCS system switches to the control mode of the central control DCS system and sets the inverter PIDE control module to manual mode. The second central control tracking module of the central control DCS system tracks the inverter control signal (AB_HZ8104A.VALUE) of the coal gas purification DCS system in real time and sends a hard-wired signal (PV_81004A.IN) to the coal gas purification DCS system through the inverter PIDEX control module. The inverter tracking module updates the inverter adjustment signal (PRC_1302A_CVPROM) according to this hard-wired signal and generates a frequency modulation signal (PV_1302A) through the program control pin (CVProg) to control the high-pressure ammonia pump inverter. This seamless switching mechanism ensures that the production process will not be disturbed under any circumstances, and improves the coal gas purification efficiency and system stability.

[0061] (4) This invention provides a method for non-disruptive control of a coal gas purification DCS system based on a central control DCS system, with particular attention to seamless switching between control modes of the high-pressure ammonia pump frequency converter. A mode switching signal (SupCon_BOOL_OUT[1]) is generated by the second switching button module. When the signal value is 0, the system switches from the mode of controlling the actuators through the central control DCS system to the mode of independently and automatically controlling the actuators in the coal gas purification DCS system. During this process, the mode switching module receives and processes the mode switching signal, sets the automatic operation pin (ProgAutoReq) in the frequency converter PIDE control module (PIDE_PRC1302A) to 1, so that the coal gas purification DCS system returns to the automatic control mode. In automatic control mode, the PIDE control module of the frequency converter in the gas purification DCS system performs PID regulation based on the outlet pressure PRC_1302A of the high-pressure ammonia pump and its setpoint, as well as the hard-wired signal (PV_81004A.IN) most recently output by the central control DCS system. This generates a frequency modulation signal (PV_1302A), which is then output to the high-pressure ammonia pump frequency converter via the execution control pin (CVEU) to precisely control its outlet pressure. This design ensures a smooth and uninterrupted transition between the old and new control systems, avoiding system fluctuations and drastic equipment movements caused by the switch, thus guaranteeing the continuity and stability of the production process.

[0062] (5) In the process of switching from local automatic control of the coke oven gas collecting pipe pressure regulating flap in the coking DCS system to remote control by the central control DCS system through the coking DCS system, the present invention generates a mode switching signal Supcon_Wire (value 1) through the third switching button module, triggering the flap PIDE control module of the coking DCS system to enter manual control mode. Simultaneously, the third central control tracking module of the central control DCS system tracks the flap control signal SUP_AB_JLFB1.VALUE of the coking DCS system in real time, and outputs a hard-wired signal PV_81001A.IN to the coking DCS system through the flap PIDEX control module. The flap tracking module of the coking DCS system generates a flap tracking control signal YI_PZ_10A_SUPCON based on this signal, and assigns it to the flap adjustment signal YI_PRC_10A_MAMUAL_SP during the switching process, thereby ensuring the continuity and consistency of the control signal. Based on this, the PIDE_05 control module receives the adjustment signal via the program control pin CVProg and generates the execution control signal YI_PRC_10A_CVEU to drive the adjustment actuator of the coke oven gas collecting pipe pressure regulating flap. This method achieves a seamless switch of control from local to remote, avoiding pressure fluctuations in the coke oven gas collecting pipe caused by sudden changes in control signals, thus ensuring the safety and stability of coke oven operation. Furthermore, the entire switching process requires no manual intervention, improving the automation level and response efficiency of the system operation, and has significant engineering application value.

[0063] (6) In the process of switching from remote control of the coke oven gas collecting pipe pressure regulating flap from the central control DCS system back to local automatic control in the coking DCS system, the present invention generates a mode switching signal Supcon_Wire (value 0) through the third switching button module, triggering the flap PIDE control module PIDE_05 of the coking DCS system to return to automatic control mode. At this time, the flap PIDE control module performs PID adjustment based on the coke oven gas collecting pipe pressure Y1_PRC_10A (actual detected value) and its set value, and combines the last hard-wired signal PV_81001A.IN output by the central control DCS system during remote control as the initial control reference, generating a new control signal YI_PRC_10A_CVEU to drive the actuator of the regulating flap. This method effectively ensures the consistency and continuity of the control signal before and after the switch, avoids drastic fluctuations in coke oven gas collecting pipe pressure or equipment malfunctions caused by the switch of control, and achieves a truly "disturbance-free switch". Meanwhile, using the previous control signal as the starting point of the new control cycle improves the stability and adjustment accuracy of the system response, further enhancing the stability and safety of the coking production process. Furthermore, the fully automated switching process reduces the uncertainty caused by human intervention, improving the overall system's intelligence level and engineering practicality.

[0064] (7) This invention enables the old system to operate normally during the installation and commissioning of the new system, without affecting normal production operation control and safe and environmentally friendly production. This design not only improves the flexibility of the system, but also enhances the reliability of the entire control system, enabling it to quickly return to a stable state in the face of emergencies.

[0065] (8) In the process of automatic control of each subsystem by the central control DCS system, the central control DCS system can track and adjust the control signals of the subsystems in real time to ensure control accuracy and response speed. For example, for the gas blower DCS system, the first central control tracking module tracks the gas blower control signal AB_HZ8103A.VALUE of the gas blower DCS system, and optimizes and adjusts the gas blower control signal through the blower PIDEX control module. Based on the adjusted signal, it outputs a hard-wired signal PV_81003A.IN to the gas blower DCS system, thereby realizing precise control of the suction force in front of the primary cooler and improving the gas purification efficiency.

[0066] (9) The technical solution of this invention is not only applicable to specific application scenarios such as gas blowers, high-pressure ammonia pumps, and coke oven gas collection pipes, but can also be widely applied to other process control systems that require switching between old and new control systems. Its core technology—the seamless switching method of PID dual control—has high replicability and promotion value, and is of great significance to the technological progress in the field of automation control. Attached Figure Description

[0067] Figure 1 This is a structural diagram of the first master control tracking module and the blower PIDEX control module in Embodiment 1 of the present invention;

[0068] Figure 2 This is a structural diagram of the first mode switching module in Embodiment 1 of the present invention;

[0069] Figure 3 This is a structural diagram of the blower tracking module in Embodiment 1 of the present invention;

[0070] Figure 4 This is a structural diagram of the blower PIDE control module in Embodiment 1 of the present invention;

[0071] Figure 5 This is a structural diagram of the second mode switching module in Embodiment 1 of the present invention;

[0072] Figure 6 This is a structural diagram of the second master control tracking module and the inverter PIDEX control module in Embodiment 2 of the present invention;

[0073] Figure 7 This is a structural diagram of the mode switching module in Embodiment 2 of the present invention;

[0074] Figure 8 This is a structural diagram of the inverter tracking module in Embodiment 2 of the present invention;

[0075] Figure 9 This is a structural diagram of the inverter PIDE control module in Embodiment 2 of the present invention;

[0076] Figure 10 This is a structural diagram of the third master control tracking module and the flip-board PIDEX control module in Embodiment 3 of the present invention;

[0077] Figure 11 This is a structural diagram of the mode switching module in Embodiment 3 of the present invention;

[0078] Figure 12 This is a structural diagram of the flip-board tracking module in Embodiment 3 of the present invention;

[0079] Figure 13 This is a structural diagram of the flip-board PIDE control module in Embodiment 3 of the present invention. Detailed Implementation

[0080] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0081] Example 1

[0082] To address the issues of violent actuator movements and large fluctuations in equipment output during the switching between old and new systems, this invention proposes a disturbance-free control method for a gas blower DCS system based on a central control DCS system. The central control DCS system includes: a first switching button module, a first central control tracking module, and a blower PIDEX control module. Figure 1 The gas blower DCS system includes: a first mode switching module ( Figure 2 ), blower tracking module ( Figure 3 ) and blower PIDE control module ( Figure 4 );like Figure 4 As shown, the blower PIDE control module includes: a first AND-OR-NOT unit BOR_01, a selection unit, and a control unit PIDE_1PRC_1401;

[0083] The disturbance-free control method includes:

[0084] Switching from the automatic control mode of the gas blower DCS system to the automatic control mode of the gas blower through the gas blower DCS system, specifically includes:

[0085] The first switching button module generates a mode switching signal SupCon_BOOL_OUT[1]. At this time, the value of the mode switching signal SupCon_BOOL_OUT[1] is 1. The first mode switching module connects to the mode switching signal SupCon_BOOL_OUT[1] and triggers the manual operation pin OperaManualReq of the control unit PIDE_1PRC_1401 in the gas blower DCS system based on the signal, so that the gas blower DCS system enters the manual control mode. At the same time:

[0086] like Figure 2 As shown, the first mode switching module includes:

[0087] The second AND-OR-NOT unit BOR_02 and the rising edge triggered single pulse module OSRI_02;

[0088] When the second AND-OR-NOT unit receives the mode switching signal SupCon_BOOL_OUT[1], it triggers the single pulse module OSRI_02 to output the value of the signal on the rising edge.

[0089] The rising edge triggered single pulse module OSRI_02 triggers the manual operation pin OperaManualReq of the control unit PIDE_1PRC_1401 in the gas blower DCS system based on the value of the signal, so that the gas blower DCS system enters the manual control mode.

[0090] like Figure 1As shown, the first master control tracking module tracks the gas blower control signal AB_HZ8103A.VALUE of the gas blower DCS system, and outputs a hard-wired signal PV_81003A.IN to the gas blower DCS system through the blower PIDEX control module PIC81003A1;

[0091] like Figure 3 As shown, the blower tracking module tracks the hard-wired signal PV_81003A.IN to obtain the gas blower tracking control signal FromSup_1PV_1401, and when it receives the mode switching signal SupCon_BOOL_OUT[1], it assigns the gas blower tracking control signal FromSup_1PV_1401 to the blower speed regulation signal PV_1401A;

[0092] When the first AND-OR-NOT unit BOR_01 receives the mode switching signal SupCon_BOOL_OUT[1], it outputs the value of the signal to the selection unit. The selection unit SEL_08 assigns the fan speed regulation signal PV_1401A to the speed control signal speed_1 based on the value of the signal and sends it to the manual control pin CVOper of the control unit PIDE_1PRC_1401.

[0093] The control unit PIDE_1PRC_1401 generates the blower-to-inverter signal H02_D1_1PV_1401 by using the signal input through the manual control pin CVOper via its execution control pin CVEU, and controls the blower inverter through this signal.

[0094] In this invention, the first switching button module in the master control DCS system generates a mode switching signal (SupCon_BOOL_OUT[1]). When the signal value is 1, the mode of the gas blower DCS system is switched to be controlled by the master control DCS system. At this time, the first mode switching module receives and triggers the manual operation pin (OperManualReq) of the gas blower PIDE control module based on this signal, so that the gas blower DCS system enters the manual mode. At the same time, the first master control tracking module of the master control DCS system tracks the control signal (AB_HZ8103A.VALUE) of the gas blower DCS system and sends a hard-wired signal (PV_81003A.IN) to the gas blower DCS system through the blower PIDEX control module. Within the gas blower DCS system, the blower tracking module updates the blower speed control signal (PV_1401A) based on the received hard-wired signal. This signal is then assigned to the speed control signal (speed_1) via a selection unit, and finally output to the blower frequency converter through the manual control pin (CVOper) of the control unit PIDE_1PRC_1401. This design ensures a seamless, uninterrupted transition between the old and new control systems, whether during normal production or in emergency situations, guaranteeing production continuity and stability.

[0095] The gas blower DCS system also includes:

[0096] like Figure 5 The second mode switching module shown includes: a sixth AND-OR-NOT unit BOR_06 and a falling-edge triggered single-pulse module OSFI_02; the disturbance-free control method further includes:

[0097] Switching from the mode where the central control DCS system automatically controls the gas blower via the gas blower DCS system to the mode where the gas blower DCS system automatically controls the gas blower, specifically includes:

[0098] The mode switching signal SupCon_BOOL_OUT[1] is generated by the first switching button module. At this time, the value of the mode switching signal SupCon_BOOL_OUT[1] is 0.

[0099] When the sixth AND-OR-NOT unit BOR_06 receives the mode switching signal SupCon_BOOL_OUT[1], it outputs the value of the signal to the falling edge triggered single pulse module OSFI_02; the falling edge triggered single pulse module OSFI_02 triggers the automatic operation pin OperaAutoReq of the control unit PIDE_1PRC_1401 in the gas blower DCS system based on the value of the signal, so that the gas blower DCS system enters the automatic control mode;

[0100] In automatic control mode, the control unit PIDE_1PRC_1401 of the gas blower DCS system performs PID adjustment based on the gas suction force H02_D1_PRC_1401A before the primary cooler and its set value, and on the most recent hard-wired signal PV_81003A.IN output by the main control DCS system. The control unit PIDE_1PRC_1401 generates the blower-to-inverter signal H02_D1_1PV_1401 through the execution control pin CVEU, and controls the blower inverter through this signal.

[0101] Conventional switching methods present significant problems during the transition between old and new control systems, particularly regarding abrupt changes in the gas blower speed control signal, drastic movements of actuators or frequency converters, and severe fluctuations in process parameters (such as blower speed). These issues seriously impact safe and environmentally friendly production. This invention perfectly solves these problems through advanced zero-interruption and abrupt-free control output signal technology. Specifically, during the switching process, whether in remote control mode via the gas blower DCS system from the central control DCS system or in local automatic control mode, the control signal is ultimately output directly to the corresponding actuator by the PIDE function block of the gas blower DCS system. This design ensures the continuity and consistency of the control signal, avoiding drastic equipment movements or significant fluctuations in system parameters caused by the switching, thereby guaranteeing production continuity and safety.

[0102] In the mode where the central control DCS system automatically controls the gas blower through the gas blower DCS system, and in the mode where the gas blower DCS system automatically controls the gas blower:

[0103] The first master control tracking module continuously tracks the gas blower control signal AB_HZ8103A.VALUE of the gas blower DCS system;

[0104] In the automatic control mode of the gas blower DCS system:

[0105] The blower tracking module stops tracking the hardwired signal PV_81003A.IN.

[0106] In the event of production failures, blower shutdown operations, new system failures, or network communication failures, it is necessary to quickly switch control from the new system back to the old system to ensure the continuity and safety of production. The rapid response mechanism in this invention can complete an emergency switch in a very short time, avoiding violent equipment actions or large fluctuations in system parameters caused by control interruption. For example, in the gas blower DCS system, the first switching button module generates a mode switching signal SupCon_BOOL_OUT[1]. When the signal value is 0, the system switches from the main control DCS system to the gas blower DCS system independent automatic control mode through the gas blower DCS system control mode, thereby quickly restoring production stability.

[0107] Example 2

[0108] To address the issues of violent actuator movements and large fluctuations in equipment output during the switching between old and new systems, this invention proposes a disturbance-free control method for a gas purification DCS system based on a central control DCS system. The central control DCS system includes: a second switching button module, a second central control tracking module, and a frequency converter PIDEX control module. Figure 6 The gas purification DCS system includes: a mode switching module ( Figure 7 ), frequency converter tracking module ( Figure 8 ) and the frequency converter PIDE control module ( Figure 9 The method includes:

[0109] Switching from the automatic control mode of the high-pressure ammonia pump frequency converter by the gas purification DCS system to the automatic control mode of the high-pressure ammonia pump frequency converter by the central control DCS system through the gas purification DCS system specifically includes:

[0110] The mode switching signal SupCon_BOOL_OUT[1] is generated by the second switching button module. At this time, the value of the mode switching signal SupCon_BOOL_OUT[1] is 1; Figure 7 As shown, the mode switching module accesses the mode switching signal SupCon_BOOL_OUT[1], and sets the PRC_1302A_AUTO signal to 0 based on this signal, and sets the value of the automatic operation pin ProgAutoReq in the PIDE_PRC1302A of the frequency converter PIDE control module to 0 through this 0 signal, so that the gas purification DCS system enters the manual control mode; at the same time:

[0111] like Figure 6As shown, the second master control tracking module tracks the inverter control signal AB_HZ8104A.VALUE of the gas purification DCS system, and outputs a hard-wired signal PV_81004A.IN to the gas purification DCS system through the inverter PIDEX control module PIC81004A1.

[0112] like Figure 8 As shown, the inverter tracking module tracks the hard-wired signal PV_81004A.IN to obtain the inverter tracking control signal Sup_PV_1302A. When it receives the mode switching signal SupCon_BOOL_OUT[1], it assigns the inverter tracking control signal Sup_PV_1302A to the inverter adjustment signal PRC_1302A_CVPROM and sends the inverter adjustment signal to the program control pin CVProg of the inverter PIDE control module PIDE_PRC1302A.

[0113] like Figure 9 As shown, the execution control pin CVEU of the PIDE control module PIDE_PRC1302A of the frequency converter generates a frequency modulation signal PV_1302A using the received value of the program control pin CVProg, and controls the high-pressure ammonia pump frequency converter through this signal.

[0114] This invention provides a method for non-disruptive control of a coal gas purification DCS system based on a central control DCS system. A mode switching signal (SupCon_BOOL_OUT[1]) is generated by the second switching button module. When the signal value is 1, the coal gas purification DCS system switches to the control mode of the central control DCS system and sets the inverter PIDE control module to manual mode. The second central control tracking module of the central control DCS system tracks the inverter control signal (AB_HZ8104A.VALUE) of the coal gas purification DCS system in real time and sends a hard-wired signal (PV_81004A.IN) to the coal gas purification DCS system through the inverter PIDEX control module. The inverter tracking module updates the inverter adjustment signal (PRC_1302A_CVPROM) according to this hard-wired signal and generates a frequency modulation signal (PV_1302A) through the program control pin (CVProg) to control the high-pressure ammonia pump inverter. This seamless switching mechanism ensures that the production process will not be disturbed under any circumstances, and improves the coal gas purification efficiency and system stability.

[0115] The disturbance-free control method further includes:

[0116] Switching the mode of the central control DCS system automatically controlling the high-pressure ammonia pump frequency converter through the gas purification DCS system to the mode of the gas purification DCS system automatically controlling the high-pressure ammonia pump frequency converter specifically includes:

[0117] The mode switching signal SupCon_BOOL_OUT[1] is generated by the second switching button module. At this time, the value of the mode switching signal SupCon_BOOL_OUT[1] is 0.

[0118] The mode switching module accesses the mode switching signal SupCon_BOOL_OUT[1], and based on this signal, sets the value of the automatic operation pin ProgAutoReq in the PIDE_PRC1302A of the frequency converter PIDE control module to 1, so that the gas purification DCS system enters the automatic control mode.

[0119] In automatic control mode, the PIDE control module PIDE_PRC1302A of the gas purification DCS system performs PID regulation based on the outlet pressure PRC_1302A of the high-pressure ammonia pump and its set value, and on the most recent hard-wired signal PV_81004A.IN output by the main control DCS system. It also generates a frequency modulation signal PV_1302A through the execution control pin CVEU of the PIDE control module PIDE_PRC1302A, and controls the outlet pressure of the high-pressure ammonia pump inverter through this signal.

[0120] In the mode where the high-pressure ammonia pump frequency converter is automatically controlled by the central control DCS system through the gas purification DCS system, and in the mode where the high-pressure ammonia pump frequency converter is automatically controlled by the gas purification DCS system:

[0121] The second master control tracking module continuously tracks the inverter control signal AB_HZ8104A.VALUE of the gas purification DCS system;

[0122] In the automatic control mode of the high-pressure ammonia water pump frequency converter in the coal gas purification DCS system:

[0123] The frequency converter tracking module stops tracking the hard-wired signal PV_81004A.IN.

[0124] The present invention generates a mode switching signal (SupCon_BOOL_OUT[1]) through the second switching button module. When the signal value is 0, the system switches from the mode of controlling the actuator through the gas purification DCS system to the mode of independently controlling the actuator in the gas purification DCS system. During this process, the mode switching module receives and processes the mode switching signal, sets the automatic operation pin (ProgAutoReq) in the inverter PIDE control module (PIDE_PRC1302A) to 1, so that the gas purification DCS system returns to the automatic control mode. In the automatic control mode, the inverter PIDE control module of the gas purification DCS system performs PID adjustment based on the high pressure ammonia pump outlet pressure PRC_1302A and its set value, as well as the hard-wired signal (PV_81004A.IN) output by the most recent control DCS system, generates a frequency modulation signal (PV_1302A), and outputs it to the high pressure ammonia pump inverter through the execution control pin (CVEU) to accurately control its outlet pressure. This design ensures a smooth and undisturbed transition between the old and new control systems, avoiding system fluctuations and violent equipment movements caused by the switch, thereby guaranteeing the continuity and stability of the production process.

[0125] Example 3

[0126] To address the issues of violent actuator movements and large fluctuations in equipment output during the switching between old and new systems, this invention also proposes a disturbance-free control method for a coking DCS system based on a central control DCS system. The central control DCS system includes: a third switching button module, a third central control tracking module, and a flip-board PIDEX control module. Figure 10 The coking DCS system includes: a mode switching module ( Figure 11 ), flip-board tracking module ( Figure 12 ) and the flip-board PIDE control module ( Figure 13 The method includes:

[0127] Switching from the automatic control mode of the coking DCS system to the automatic control mode of the coking oven gas collecting pipe pressure regulating flap to the mode where the central control DCS system controls the coking oven gas collecting pipe pressure regulating flap via the coking DCS system, specifically includes:

[0128] The mode switching signal Supcon_Wire is generated through the third switch button module. At this time, the value of the mode switching signal Supcon_Wire is 1; for example... Figure 11As shown, the mode switching module receives the mode switching signal Supcon_Wire, and based on this signal, sets the YI_PRC_10A_auto signal to 0. This 0 setting then sets the value of the automatic operation pin ProgAutoReq in the flip-board PIDE control module PIDE_05 to 0, thus putting the coking DCS system into manual control mode. Simultaneously:

[0129] like Figure 10 As shown, the third master control tracking module tracks the flap control signal SUP_AB_JLFB1.VALUE of the coking DCS system, and outputs a hard-wired signal PV_81001A.IN to the coking DCS system through the flap PIDEX control module;

[0130] like Figure 12 As shown, the flip-board tracking module tracks the hard-wired signal PV_81001A.IN to obtain the flip-board tracking control signal YI_PZ_10A_SUPCON. When it receives the mode switching signal Supcon_Wire, it assigns the flip-board tracking control signal YI_PZ_10A_SUPCON to the flip-board adjustment signal YI_PRC_10A_MAMUAL_SP and sends the flip-board adjustment signal to the program control pin CVProg of the flip-board PIDE control module PIDE_05.

[0131] like Figure 13 As shown, the execution control pin CVEU of the flip-plate PIDE control module PIDE_05 uses the received value of the program control pin CVProg to generate the adjustment signal YI_PRC_10A_CVEU of the coke oven gas collecting pipe pressure regulating flip-plate, and outputs the signal to the regulating actuator of the coke oven gas collecting pipe pressure regulating flip-plate.

[0132] In this invention, during the transition from local automatic control of the coke oven gas collecting pipe pressure regulating flap in the coking DCS system to remote control via the central control DCS system, a mode switching signal Supcon_Wire (value 1) is generated by the third switching button module, triggering the flap PIDE control module of the coking DCS system to enter manual control mode. Simultaneously, the third central control tracking module of the central control DCS system tracks the flap control signal SUP_AB_JLFB1.VALUE of the coking DCS system in real time and outputs a hard-wired signal PV_81001A.IN to the coking DCS system through the flap PIDEX control module. Based on this signal, the flap tracking module of the coking DCS system generates a flap tracking control signal YI_PZ_10A_SUPCON and assigns it to the flap adjustment signal YI_PRC_10A_MAMUAL_SP during the switching process, thereby ensuring the continuity and consistency of the control signal. Based on this, the PIDE_05 control module receives the adjustment signal via the program control pin CVProg and generates the execution control signal YI_PRC_10A_CVEU to drive the adjustment actuator of the coke oven gas collecting pipe pressure regulating flap. This method achieves a seamless switch of control from local to remote, avoiding pressure fluctuations in the coke oven gas collecting pipe caused by sudden changes in control signals, thus ensuring the safety and stability of coke oven operation. Furthermore, the entire switching process requires no manual intervention, improving the automation level and response efficiency of the system operation, and has significant engineering application value.

[0133] The disturbance-free control method further includes:

[0134] Switching the mode of the central control DCS system automatically controlling the pressure regulating flap of the coke oven gas collecting pipe through the coking DCS system to the mode of the coking DCS system automatically controlling the pressure regulating flap of the coke oven gas collecting pipe specifically includes:

[0135] The mode switching signal Supcon_Wire is generated by the third switching button module. At this time, the value of the mode switching signal Supcon_Wire is 0.

[0136] The mode switching module receives the mode switching signal Supcon_Wire and sets the value of the automatic operation pin ProgAutoReq in the flip-board PIDE control module PIDE_05 to 1 based on the signal, so that the coking DCS system enters the automatic control mode.

[0137] In automatic control mode, the PIDE_05 flap control module of the coking DCS system performs PID adjustment based on the coke oven gas collecting pipe pressure Y1_PRC_10A and its set value, and on the most recent hard-wired signal PV_81001A.IN output by the main control DCS system. The adjustment signal YI_PRC_10A_CVEU of the coke oven gas collecting pipe pressure regulating flap is generated through the execution control pin CVEU of the flap control module PIDE_05, and the signal is output to the regulating actuator of the coke oven gas collecting pipe pressure regulating flap.

[0138] In the process of switching from remote control of the coke oven gas collecting pipe pressure regulating flap from the central control DCS system back to local automatic control in the coking DCS system, this invention generates a mode switching signal Supcon_Wire (value 0) through the third switching button module, triggering the flap PIDE control module PIDE_05 of the coking DCS system to return to automatic control mode. At this time, the flap PIDE control module, based on the coke oven gas collecting pipe pressure Y1_PRC_10A (the actual detected value) and its set value, and combined with the last hardwired signal PV_81001A.IN output by the central control DCS system during remote control as the initial control reference, performs PID adjustment to generate a new control signal YI_PRC_10A_CVEU, which drives the actuator of the regulating flap. This method effectively ensures the consistency and continuity of the control signal before and after the switch, avoiding drastic fluctuations in coke oven gas collecting pipe pressure or equipment malfunctions caused by the switch of control, achieving a truly "disturbance-free switch." Meanwhile, using the previous control signal as the starting point of the new control cycle improves the stability and adjustment accuracy of the system response, further enhancing the stability and safety of the coking production process. Furthermore, the fully automated switching process reduces the uncertainty caused by human intervention, improving the overall system's intelligence level and engineering practicality.

[0139] In normal production processes, to achieve optimal control, it is sometimes necessary to switch from an old system to a new one. This invention enables seamless switching whether the main control DCS system is in automatic control mode via its subsystems, or whether each subsystem (i.e., the old system) is in independent automatic control mode. For example, in a coking DCS system, a mode switching signal, Supcon_Wire, is generated by a third switching button module. When this signal value is 1, the system switches from the automatic control mode of the coking DCS system to the mode controlled by the main control DCS system via the coking DCS system; when the signal value is 0, it reverts to the automatic control mode of the coking DCS system. This seamless switching mechanism ensures the continuity and stability of the production process.

[0140] In the mode where the central control DCS system automatically controls the pressure regulating flap of the coke oven gas collecting pipe through the coking DCS system, and in the mode where the coking DCS system automatically controls the pressure regulating flap of the coke oven gas collecting pipe:

[0141] The third master control tracking module always tracks the flap control signal SUP_AB_JLFB1.VALUE of the coking DCS system;

[0142] In the mode of automatic control of the coke oven gas collecting pipe pressure regulating flap in the coking DCS system:

[0143] The flip-board tracking module stops tracking the hardwired signal PV_81001A.IN.

[0144] The principle of disturbance-free control in this embodiment is as follows (the principle of disturbance-free control in the other two embodiments is the same as that in this embodiment):

[0145] Whether in remote control mode via the coking DCS system or in local automatic control mode, the coking DCS system itself is always the one ultimately outputting control signals to actuators such as the coke oven gas collecting pipe pressure regulating flap. This design ensures that the output path and execution logic of the control signals remain consistent regardless of which mode is dominant, fundamentally guaranteeing the continuity and stability of the control process.

[0146] Specifically, when the central control DCS system is remotely controlled, the third central control tracking module tracks the flap control signal SUP_AB_JLFB1.VALUE of the coking DCS system in real time, and outputs a hard-wired signal PV_81001A.IN to the coking DCS system through the flap PIDEX control module. The flap tracking module of the coking DCS system generates a flap tracking control signal YI_PZ_10A_SUPCON based on this signal, and assigns it to the flap adjustment signal YI_PRC_10A_MAMUAL_SP. Then, the flap PIDE control module PIDE_05 of the coking DCS system generates the final control signal YI_PRC_10A_CVEU through the execution control pin CVEU, and outputs it to the adjustment actuator.

[0147] When switching back to the local automatic control mode of the coking DCS system, the flap PIDE control module continues to perform PID adjustment based on the latest coke oven gas collecting pipe pressure setpoint and its actual detection value, and combined with the hard-wired signal PV_81001A.IN output by the main control DCS system the most recent time, as the initial control reference. This generates a new control signal YI_PRC_10A_CVEU, which is still directly output to the actuator by the coking DCS system.

[0148] Therefore, throughout the entire control process, the generation and output of control signals are always completed by the coking DCS system; only the source of the control logic (local settings or central control commands) changes. This structural design not only achieves true "disruptive switching," avoiding pressure fluctuations or equipment malfunctions caused by changes in the control path, but also improves the system's stability and responsiveness. Furthermore, mode switching can be completed without manual intervention, further enhancing the system's automation level and operational reliability.

[0149] It needs to be emphasized that:

[0150] When switching to the new system (central DCS system), the PIDE function block in the old system (such as the coking DCS system, gas purification DCS system, or gas blower DCS system) simultaneously switches to manual mode. In this mode, the control output signal sent from the new system is directly output through the PIDE function block of the old system, ensuring that the signal can be seamlessly transmitted and drive the actuators or frequency converters. This method ensures the continuity and consistency of the control signal during the switching process, avoiding abnormal actuator operation or equipment output fluctuations caused by the switching, thus achieving a smooth switching. Specifically, whether in remote control mode of the central DCS system or local automatic control mode of the old system, the control signal is ultimately output to the corresponding actuator by the PIDE function block of the old system, ensuring the safety and stability of the production process.

[0151] The technical solution of this invention is particularly suitable for automated control scenarios where an optimized control system is added to the existing conventional process control system PID control, while retaining the original system as a backup.

[0152] It should also be noted that conventional switching methods have many problems in optimizing and upgrading process control systems, especially in the technical transformation of coking plant gas collection pipe pressure optimization control. For example, in scenarios such as frequent switching during installation and commissioning, normal switching of production control, and emergency switching in abnormal situations, coordination is complex, operation procedures are cumbersome, synchronization cannot be guaranteed, and human intervention is not timely, often leading to a long period of system control failure. This invention, through seamless connection and disturbance-free switching technology, ensures that even frequent switching will not cause disturbance to the actuators (such as the gas blower frequency converter, high-pressure ammonia pump frequency converter, and coke oven gas collection pipe pressure regulating flap). Whether switching from the central control DCS system back to the coking DCS system's independent automatic control mode, or vice versa, the entire switching process is fully automated and requires no human intervention, greatly simplifying the operation process, improving system synchronization and response efficiency, reducing the uncertainty caused by human operation, and enhancing the overall system's intelligence level and engineering practicality.

[0153] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0154] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0155] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0156] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. A method for disturbance-free control of a gas blower DCS system based on a central control DCS system, characterized in that, The central control DCS system includes: a first switching button module, a first central control tracking module, and a blower PIDEX control module; the gas blower DCS system includes: a first mode switching module, a blower tracking module, and a blower PIDE control module; the blower PIDE control module includes: a first AND, OR, NOT unit, a selection unit, and a control unit; The disturbance-free control method includes: Switching from the automatic control mode of the gas blower DCS system to the automatic control mode of the gas blower through the gas blower DCS system, specifically includes: A mode switching signal is generated by the first switching button module. At this time, the value of the mode switching signal is 1. The first mode switching module receives the mode switching signal and triggers the manual operation pin of the control unit in the gas blower DCS system based on the signal, so that the gas blower DCS system enters the manual control mode. Simultaneously: The first master control tracking module tracks the gas blower control signal of the gas blower DCS system and outputs hard-wired signals to the gas blower DCS system through the blower PIDEX control module. The blower tracking module tracks the hard-wired signal to obtain the gas blower tracking control signal, and when it receives the mode switching signal, it assigns the gas blower tracking control signal to the blower speed regulation signal. When the first AND-OR-NOT unit receives the mode switching signal, it outputs the value of the signal to the selection unit. The selection unit assigns the fan speed regulation signal to the speed control signal based on the value of the signal and sends it to the manual control pin of the control unit. The control unit generates a fan-to-inverter signal by using the signal input to the manual control pin through its execution control pin, and controls the blower inverter through the signal.

2. The method for disturbance-free control of a gas blower DCS system based on a central control DCS system according to claim 1, characterized in that, The first mode switching module includes: The second AND-OR-NOT unit and the rising edge trigger single pulse module; When the second AND-OR-NOT unit receives the mode switching signal, it triggers the single-pulse module to output the value of the signal on the rising edge. The rising edge triggered single pulse module triggers the manual operation pin of the control unit in the gas blower DCS system based on the value of the signal, so that the gas blower DCS system enters the manual control mode.

3. The method for disturbance-free control of a gas blower DCS system based on a central control DCS system according to claim 2, characterized in that, The gas blower DCS system also includes: The second mode switching module includes: a sixth AND-OR-NOT unit and a falling edge-triggered single pulse module; the disturbance-free control method further includes: Switching from the mode where the central control DCS system automatically controls the gas blower via the gas blower DCS system to the mode where the gas blower DCS system automatically controls the gas blower, specifically includes: A mode switching signal is generated by the first switching button module. At this time, the value of the mode switching signal is 0. When the sixth AND-OR-NOT unit receives the mode switching signal, it outputs the value of the signal to the falling edge triggered single pulse module; the falling edge triggered single pulse module triggers the automatic operation pin of the control unit in the gas blower DCS system based on the value of the signal, so that the gas blower DCS system enters the automatic control mode. In automatic control mode, the control unit of the gas blower DCS system performs PID adjustment based on the gas suction force in front of the primary cooler and its set value, on the basis of the most recent hard-wired signal output by the main control DCS system, and generates a blower-to-inverter signal through the execution control pin CVEU of the control unit, and controls the blower inverter through the signal.

4. The method for disturbance-free control of a gas blower DCS system based on a central control DCS system according to claim 3, characterized in that, In the mode where the central control DCS system automatically controls the gas blower through the gas blower DCS system, and in the mode where the gas blower DCS system automatically controls the gas blower: The first master control tracking module always tracks the gas blower control signal of the gas blower DCS system; In the automatic control mode of the gas blower DCS system: The blower tracking module stops tracking the hard-wired signal.

5. A method for disturbance-free control of a gas purification DCS system based on a central control DCS system, characterized in that, The central control DCS system includes: a second switching button module, a second central control tracking module, and a frequency converter PIDEX control module; the gas purification DCS system includes: a mode switching module, a frequency converter tracking module, and a frequency converter PIDE control module; the method includes: Switching from the automatic control mode of the high-pressure ammonia pump frequency converter by the gas purification DCS system to the automatic control mode of the high-pressure ammonia pump frequency converter by the central control DCS system through the gas purification DCS system specifically includes: A mode switching signal is generated by the second switching button module. At this time, the value of the mode switching signal is 1. The mode switching module receives the mode switching signal and sets the value of the automatic operation pin in the inverter PIDE control module to 0 based on the signal, so that the gas purification DCS system enters the manual control mode. Simultaneously: The second master control tracking module tracks the inverter control signal of the gas purification DCS system and outputs hard-wired signals to the gas purification DCS system through the inverter PIDEX control module; The inverter tracking module tracks the hard-wired signal to obtain the inverter tracking control signal. When it receives the mode switching signal, it assigns the inverter tracking control signal to the inverter adjustment signal and sends the inverter adjustment signal to the program control pin of the inverter PIDE control module. The execution control pin of the inverter PIDE control module generates a frequency modulation signal using the received value of the program control pin, and controls the high-pressure ammonia pump inverter through this signal.

6. The method for disturbance-free control of a gas purification DCS system based on a central control DCS system according to claim 5, characterized in that, The disturbance-free control method further includes: Switching the mode of the central control DCS system automatically controlling the high-pressure ammonia pump frequency converter through the gas purification DCS system to the mode of the gas purification DCS system automatically controlling the high-pressure ammonia pump frequency converter specifically includes: A mode switching signal is generated by the second switching button module. At this time, the value of the mode switching signal is 0. The mode switching module receives the mode switching signal and sets the value of the automatic operation pin in the inverter PIDE control module to 1 based on the signal, so that the gas purification DCS system enters the automatic control mode. In automatic control mode, the frequency converter PIDE control module of the gas purification DCS system performs PID adjustment based on the outlet pressure of the high-pressure ammonia pump and its set value, on the basis of the most recent hard-wired signal output by the main control DCS system, and generates a frequency modulation signal through the execution control pin of the frequency converter PIDE control module, and controls the outlet pressure of the high-pressure ammonia pump frequency converter through the signal.

7. The method for disturbance-free control of a gas purification DCS system based on a central control DCS system according to claim 6, characterized in that, In the mode where the high-pressure ammonia pump frequency converter is automatically controlled by the central control DCS system through the gas purification DCS system, and in the mode where the high-pressure ammonia pump frequency converter is automatically controlled by the gas purification DCS system: The second master control tracking module constantly tracks the inverter control signal of the gas purification DCS system; In the automatic control mode of the high-pressure ammonia water pump frequency converter in the coal gas purification DCS system: The frequency converter tracking module stops tracking hard-wired signals.

8. A method for disturbance-free control of a coking DCS system based on a central control DCS system, characterized in that, The central control DCS system includes: a third switching button module, a third central control tracking module, and a flip-board PIDEX control module; the coking DCS system includes: a mode switching module, a flip-board tracking module, and a flip-board PIDE control module; the method includes: Switching from the automatic control mode of the coking DCS system to the automatic control mode of the coking oven gas collecting pipe pressure regulating flap to the mode where the central control DCS system controls the coking oven gas collecting pipe pressure regulating flap via the coking DCS system, specifically includes: A mode switching signal is generated by the third switching button module. At this time, the value of the mode switching signal is 1. The mode switching module receives the mode switching signal and sets the value of the automatic operation pin in the flip-panel PIDE control module to 0 based on the signal, so that the coking DCS system enters the manual control mode. Simultaneously: The third master control tracking module tracks the flap control signal of the coking DCS system and outputs hard-wired signals to the coking DCS system through the flap PIDEX control module. The flip-board tracking module tracks the hard-wired signal to obtain the flip-board tracking control signal. When it receives the mode switching signal, it assigns the flip-board tracking control signal to the flip-board adjustment signal and sends the flip-board adjustment signal to the program control pin of the flip-board PIDE control module. The execution control pin CVEU of the flap control module uses the received value of the program control pin to generate an adjustment signal for the coke oven gas collecting pipe pressure regulating flap, and outputs the signal to the regulating actuator of the coke oven gas collecting pipe pressure regulating flap.

9. A method for disturbance-free control of a coking DCS system based on a central control DCS system according to claim 8, characterized in that, The disturbance-free control method further includes: Switching the mode of the central control DCS system automatically controlling the pressure regulating flap of the coke oven gas collecting pipe through the coking DCS system to the mode of the coking DCS system automatically controlling the pressure regulating flap of the coke oven gas collecting pipe specifically includes: A mode switching signal is generated by the third switching button module. At this time, the value of the mode switching signal is 0. The mode switching module receives the mode switching signal and sets the value of the automatic operation pin in the flip-board PIDE control module to 1 based on the signal, so that the coking DCS system enters the automatic control mode. In automatic control mode, the flapper PIDE control module of the coking DCS system performs PID adjustment based on the coke oven gas collecting pipe pressure and its set value, on the basis of the most recent hard-wired signal output by the main control DCS system, and generates the adjustment signal of the coke oven gas collecting pipe pressure regulating flapper through the execution control pin of the flapper PIDE control module, and outputs the signal to the regulating actuator of the coke oven gas collecting pipe pressure regulating flapper.

10. The method for disturbance-free control of a coking DCS system based on a central control DCS system according to claim 9, characterized in that, In the mode where the central control DCS system automatically controls the pressure regulating flap of the coke oven gas collecting pipe through the coking DCS system, and in the mode where the coking DCS system automatically controls the pressure regulating flap of the coke oven gas collecting pipe: The third master control tracking module always tracks the flap control signal of the coking DCS system. In the mode of automatic control of the coke oven gas collecting pipe pressure regulating flap in the coking DCS system: The flip-board tracking module stops tracking hard-wired signals.

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