A pressure monotonic system for coke oven carbonization chamber

Abstract

The present invention relates to the field of coke oven carbonization chamber pressure control and discloses a coke oven carbonization chamber pressure monotonic system, comprising: a plurality of coke oven carbonization chamber pressure monotonic subsystems matching the number of coke ovens, wherein each two coke ovens share one coke oven pressure monotonic subsystem; each coke oven pressure monotonic subsystem comprises a control system cabinet and a field control cabinet; a DCS system is installed in the control system cabinet, which collects data and controls field equipment via a fieldbus module; each control system cabinet is connected to the field control cabinets on the tops of the two coke ovens via optical fibers; a plurality of field control cabinets are installed on the gas collecting duct platform on the top of each coke oven, and the plurality of field control cabinets are connected to each other using a star topology network; a plurality of monitoring and operating stations matching the number of coke ovens are provided, and the plurality of coke oven pressure monotonic subsystems are connected to a first number of monitoring and operating stations located in a centralized control center via optical fibers in a ring topology structure. Thus, pressure control of the coke oven carbonization chamber is achieved.

Description

Technical Field

[0001] The invention relates to the field of pressure control of a coke oven carbonization chamber, and in particular to a pressure monotonic system for a coke oven carbonization chamber. Background Art

[0002] The coke oven carbonization chamber pressure monotonic system regulates the pressure of the coke oven carbonization chamber online, so that the pressure of the coke oven carbonization chamber is stably maintained at a slightly positive pressure throughout the entire coking cycle; in addition, the coke oven carbonization chamber pressure monotonic system also involves a water seal valve disc structure that uses air pressure to drive the water seal valve to solve the problem of substandard smoke dust emissions when loading coal into the coke oven, thereby realizing smokeless coal loading.

[0003] The following technical problems often occur in the existing coke oven single carbonization chamber pressure control process:

[0004] First, the traditional carbonization chamber pressure control system has a complex structure, with numerous and dispersed devices, and relies on communications for integration. If the optical cable or communication equipment fails, the centralized control room will be unable to operate normally, causing smoke to rise from the coke oven roof riser, which in turn causes environmental accidents.

[0005] Second, the traditional carbonization chamber pressure control system is powered by a single UPS and lacks power monitoring. Power outages cannot be detected and repaired in a short period of time. In the later stages of coking, the water seal valve in the carbonization chamber of a traditional coke oven has poor pressure regulation characteristics, making it impossible to adjust the pressure. This leads to excessive negative pressure, affecting coking quality and generating excessive exhaust gas, which increases smoke exhaust from the furnace top and worsens environmental pollution.

[0006] Third, multiple carbonization chamber pressure monotonic subsystems are connected to a number of monitoring and operation stations located in the centralized control center via optical fiber in a ring topology. A failure at any node would affect communication across the entire network. Using a traditional redundant ring network would require adding an additional optical fiber to the existing system, resulting in high retrofit costs and making it difficult to implement for existing systems. Summary of the Invention

[0007] This summary is intended to briefly introduce concepts that will be described in detail in the detailed description below. This summary is not intended to identify key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0008] The present invention proposes a coke oven carbonization chamber pressure monotonic system to solve one or more of the technical problems mentioned in the above background technology part.

[0009] The present invention provides a coke oven carbonization chamber pressure monotonic system, comprising: a plurality of carbonization chamber pressure monotonic subsystems matching the number of coke ovens, wherein every two coke ovens share one carbonization chamber pressure monotonic subsystem; each carbonization chamber pressure monotonic subsystem comprises a control system cabinet and a field control cabinet, the control system cabinet is arranged in the coke oven cabinet room, and the field control cabinet is arranged on the gas collecting pipe platform on the coke oven top; the field control cabinet serves as a remote substation of the control system and is directly connected to the field equipment; a DCS system is arranged in the control system cabinet, and collects data and controls the field equipment through a field bus module; In the embodiment, each control system cabinet is connected to the field control cabinets on the tops of the two coke ovens through optical fibers; wherein, each coke oven top gas collecting pipe platform is provided with multiple field control cabinets, and the multiple field control cabinets are connected with a star topology network; there are multiple monitoring operation stations matching the number of coke ovens, a first number of the multiple monitoring operation stations are arranged in the centralized control center, a second number of the monitoring operation stations are arranged in the coke oven control room, and multiple sets of carbonization chamber pressure monotonic subsystems are connected to the first number of monitoring operation stations arranged in the centralized control center through optical fibers in a ring topology structure.

[0010] Optionally, the coke oven carbonization chamber pressure monotonic system of the present invention further includes:

[0011] The power detection relay is installed at the UPS power supply line; the power detection relay is used to detect the power failure signal and transmit the power failure signal to the DCS system. After the DCS system receives the power failure signal, it executes the sound and light alarm.

[0012] Optionally, the first number of monitoring operation stations are connected to two control room switches set up in the centralized control center. Each control system cabinet is equipped with four switches. The four switches include two ring network switches. Each ring network switch and each control room switch designates two optical fiber interfaces as ring network interfaces; multiple sets of carbonization chamber pressure monotonic subsystems and two control room switches form a ring network through the ring network interface.

[0013] Optionally, the four switches also include two common switches, and the two common switches are used to control communication between the control system cabinet and the on-site control cabinet.

[0014] Optionally, each of the multiple monitoring operation stations is used to monitor the pressure parameter information of the corresponding coke oven carbonization chamber, wherein the pressure parameter information includes multiple pressure values and the pressure state corresponding to each pressure value. If any pressure value among the multiple pressure values exceeds the corresponding preset pressure value range, a light flashing alarm is triggered; the pressure state is one of the following: normal, warning, danger; wherein, one pressure state corresponds to one color display mode.

[0015] Optionally, each of the multiple carbonization chamber pressure monotonic subsystems is also used to determine the water seal valve state of the corresponding coke oven carbonization chamber based on multiple pressure values, wherein the water seal valve state is the water seal valve open state or the water seal valve closed state.

[0016] Optionally, each carbonization chamber pressure monotonic subsystem is configured with two UPS power supplies, the two UPS power supplies including a first UPS power supply and a second UPS power supply; when the first UPS power supply fails, the second UPS power supply is started.

[0017] Optionally, the maintenance personnel performs maintenance operations when the first UPS power supply or the second UPS power supply is in shutdown state, static bypass state or rectification and inversion state.

[0018] The present invention has the following beneficial effects:

[0019] 1. It solves the problem of unified control between multiple devices in the traditional carbonization chamber pressure control system. The traditional carbonization chamber pressure control system has a complex structure, many and scattered devices, and relies on communication for integration. Once the optical cable or communication equipment fails, the centralized control room will not be able to control normally. The present invention adopts a star topology network to connect multiple field control cabinets, ensuring that the failure of a single node will not affect the overall operation of the network; furthermore, the carbonization chamber pressure monotonic subsystem and the monitoring and operation station of the centralized control center adopt a ring topology structure to connect. Even if a node fails, data transmission can still be carried out in the other direction, reducing the risk of control interruption due to communication failure; the DCS system is integrated in the control system cabinet, and the field bus module is used to collect data and control the field equipment to achieve automated monitoring and control, reduce manual intervention, and improve the production efficiency of the coke oven;

[0020] 2. It solves the problems of unstable power supply and poor water seal valve pressure regulation in the traditional coke oven carbonization chamber pressure control system, which cause the coke quality of the coke oven to deteriorate and the environmental pollution. The traditional coke oven pressure control system adopts a single UPS for power supply, and lacks power monitoring. After the system is powered off, it cannot be discovered and repaired in a short time. The present invention sets a power detection relay at the UPS power input line to monitor the power outage in real time and alarm, so as to ensure that the coke oven carbonization chamber pressure monotonic system responds in time and guarantees the stability of the coke oven carbonization chamber pressure control. Two UPS power supplies are configured to achieve automatic switching and provide high-reliability power guarantee. Furthermore, communication redundancy is enhanced through the ring network interface and multiple switches to avoid control interruption caused by communication failure. In the late coking stage of the traditional coke oven carbonization chamber, due to the poor pressure regulation characteristics of the water seal valve, the pressure cannot be adjusted, resulting in excessive negative pressure, affecting the coking quality, and generating excessive waste gas, aggravating environmental pollution. The present invention monitors the carbonization chamber pressure in real time through the monitoring operation station, and displays the alarm through status and color. Once the pressure value exceeds the limit, a flashing alarm is triggered, and the water seal valve status is adjusted in time to prevent abnormal pressure, reduce waste gas emissions, and improve coal gas recovery and coke quality.

[0021] 3. It solves the problem of high cost transformation of traditional redundant ring networks. Compared with traditional redundant ring networks, the present invention does not require additional laying of optical fibers, which reduces the transformation cost. Specifically, by introducing fixed backup access nodes and mobile backup access nodes, combined with the dynamic switching mechanism of the backup ring network interface, rapid fault diagnosis and recovery of the ring network are achieved, providing flexible troubleshooting means, avoiding the normal communication of the entire network affected by single point failures, and improving network reliability and maintenance efficiency. Troubleshooting of traditional redundant ring networks often requires manual inspection and replacement of equipment one by one, which is time-consuming and affects system operation. In the present invention, maintenance personnel can view the node status in real time through the maintenance personnel terminal, accurately locate the fault point, and quickly repair or replace the faulty equipment, thereby improving maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other features, advantages, and aspects of the various embodiments of the present invention will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the elements are not necessarily drawn to scale.

[0023] Figure 1 It is a structural schematic diagram of the pressure monotonic subsystem of the coke oven carbonization chamber of the present invention;

[0024] Figure 2 It is a connection diagram of a star topology network between multiple field control cabinets in the coke oven carbonization chamber pressure monotonic subsystem of the present invention;

[0025] Figure 3This is a connection diagram of a ring topology structure between multiple carbonization chamber pressure monotonic subsystems and monitoring operation stations of the present invention;

[0026] Figure 4 It is a monitoring alarm diagram of the computer monitoring screen of the DCS system of the present invention;

[0027] Figure 5 This is a pressure value monitoring diagram of the coke oven carbonization chamber of the present invention. DETAILED DESCRIPTION

[0028] The present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0029] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.

[0030] It should be noted that the concepts of "first" and "second" mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0031] It should be noted that the modifications of "one" and "multiple" mentioned in the present invention are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0032] The names of the messages or information exchanged between multiple devices of the present invention are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0034] like Figure 1 As shown, Figure 1 This is a structural diagram of the pressure monotonic subsystem of the coke oven carbonization chamber of the present invention. Figure 1The carbonization chamber pressure monotonic subsystem of coke oven No. 1 and coke oven No. 2 is used as an example for explanation. In practice, the coke oven carbonization chamber pressure monotonic subsystem includes multiple sets of carbonization chamber pressure monotonic subsystems that match the number of coke ovens, wherein every two coke ovens share one set of carbonization chamber pressure monotonic subsystem. For example, if the number of coke ovens is 6, then there are 3 sets of carbonization chamber pressure monotonic subsystems. Each set of carbonization chamber pressure monotonic subsystem includes a control system cabinet and a field control cabinet. The control system cabinet is set in the coke oven cabinet room, and the field control cabinet is arranged on the gas collecting pipe platform on the top of the coke oven. The field control cabinet is a remote substation of the control system and is directly connected to the field equipment. A DCS system is set in the control system cabinet, and data is collected and field equipment is controlled through a field bus module. Each control system cabinet is connected to the field control cabinets on the tops of the two coke ovens through optical fibers. Each coke oven top gas collecting pipe platform is provided with multiple field control cabinets, such as Figure 1 As shown, the No. 1 coke oven top gas collecting pipe platform is equipped with 17 field control cabinets, and multiple field control cabinets are connected using a star topology network.

[0035] In some embodiments, the carbonization chamber pressure monotonic subsystem regulates and controls the pressure within the coke oven's carbonization chamber, ensuring a safe, stable, and efficient carbonization process. Precisely controlling the pressure within the coke oven's carbonization chamber is crucial during the carbonization process, as it not only directly impacts the efficiency and safety of the carbonization reaction but also the quality of the resulting coke.

[0036] In some embodiments, a control system cabinet is located between the coke oven cabinets. It houses a DCS system and uses a fieldbus module to collect data and control field equipment. Each control system cabinet is connected to the field control cabinets at the tops of the two coke ovens via optical fiber. A DCS system is a distributed control system, employing the fundamental design principle of decentralized control and centralized operation and management. Its primary features are centralized management and decentralized control. The control system cabinet is equipped with a control module, interface module, communication module, power module, and switch.

[0037] In some embodiments, the field control cabinet is arranged on the gas collecting pipe platform on the top of the coke oven. The field control cabinet serves as a remote substation of the control system and is directly connected to the field equipment. The field equipment can be a pressure transmitter, a positioner or a solenoid valve, etc. Each coke oven top gas collecting pipe platform is equipped with multiple field control cabinets, and the multiple field control cabinets are connected using a star topology network. Figure 2 FIG. 1 is a diagram showing a connection between multiple field control cabinets in a coke oven carbonization chamber pressure monotonic subsystem according to the present invention using a star topology network. Figure 2As an example, the diagram only shows the star-topology network connection between the switch and "Field Control Cabinet 1#," "Field Control Cabinet 2#," "Field Control Cabinet 16#," and "Field Control Cabinet 17#." Field Control Cabinet 3# through "Field Control Cabinet 15#" are not shown. A star-topology network is a network structure centered around a switch, connecting all network nodes to it. The switch is the core device in a star-topology network. The advantage of a star-topology network is its flexibility in adding and removing nodes. A single node failure will not affect the overall operation of the network. Therefore, a network failure in a field control cabinet will only affect the coke oven carbonization chamber equipment it controls, leaving other coke oven carbonization chamber equipment unaffected.

[0038] The coke oven carbonization chamber pressure monotonic system of the present invention includes: a plurality of monitoring and operating stations corresponding to the number of coke ovens. For example, if there are six coke ovens, there are six monitoring and operating stations, which can be staff computers. A first number (which can be three) of the plurality of monitoring and operating stations are located in a centralized control center to remotely control the carbonization chamber pressure monotonic subsystem; a second number (which can be three) of the monitoring and operating stations are located in the coke oven control room to facilitate staff monitoring and maintenance of the coke oven carbonization chamber. The plurality of carbonization chamber pressure monotonic subsystems are connected to the first number (three) of monitoring and operating stations located in the centralized control center via optical fibers in a ring topology.

[0039] In some embodiments, as Figure 3 The figure shows a connection diagram of a ring topology structure between multiple carbonization chamber pressure monotonic subsystems and monitoring operation stations of the present invention. Figure 3 The figure shows the ring topology connection between the three carbonization chamber pressure monotonic subsystems and a monitoring and operation station in the centralized control center. The ring topology connects end to end, forming a closed loop. The advantages of the ring topology are simple wiring and short lines. Even if a node fails, data transmission can still be carried out in the other direction, reducing the risk of control interruption due to communication failures.

[0040] In some embodiments, the problem of unified control between multiple devices in the traditional carbonization chamber pressure control system is solved. The traditional carbonization chamber pressure control system has a complex structure, many and scattered devices, and relies on communication for integration. Once the optical cable or communication equipment fails, the centralized control room will not be able to control normally. The present invention uses a star topology network to connect multiple field control cabinets to ensure that a single node failure will not affect the overall operation of the network; further, a ring topology structure is used to connect the carbonization chamber pressure monotonic subsystem and the centralized control center monitoring operation station. Even if a node fails, data transmission can still be carried out in another direction, reducing the risk of control interruption due to communication failure; the DCS system is integrated in the control system cabinet, and data is collected and controlled by the field bus module to achieve automatic monitoring and regulation, reduce manual intervention, and improve the production efficiency of the coke oven.

[0041] In some embodiments, in order to further solve the second technical problem described in the background technology section, namely, "the power supply of the traditional carbonization chamber pressure control system is powered by a single UPS, and there is a lack of power monitoring. After the system is powered off, it cannot be discovered and repaired in a short time; in the late stage of coking, the pressure in the traditional coke oven carbonization chamber cannot be adjusted due to the poor pressure regulating characteristics of the water seal valve, resulting in excessive negative pressure, affecting the coking quality, and generating excessive exhaust gas, increasing the smoke exhaust from the furnace top, and aggravating environmental pollution", in some embodiments of the present invention, the coke oven carbonization chamber pressure monotonic system of the present invention also includes:

[0042] The power detection relay is installed at the UPS power supply line; the power detection relay is used to detect the power failure signal and transmit the power failure signal to the DCS system. After the DCS system receives the power failure signal, it executes the sound and light alarm.

[0043] In some embodiments, the power detection relay is set at the UPS power line, and its main function is to detect the power failure signal and transmit the power failure signal to the DCS system, such as Figure 4 The figure shows the monitoring alarm screen of the DCS system of the present invention. Once the DCS system receives a power outage signal, it triggers an audible and visual alarm to remind the operator to take timely measures to prevent production interruption or equipment damage. The audible and visual alarm can be a buzzer, siren, color warning light, or on-screen alarm prompt. A UPS power supply is an uninterruptible power supply that includes an energy storage device. It is primarily used to provide uninterruptible power to equipment that requires high power stability.

[0044] Among them, the first number of monitoring operation stations are connected to two control room switches set up in the centralized control center. Each control system cabinet is equipped with four switches. The four switches include two ring network switches. Each ring network switch and each control room switch designates two optical fiber interfaces as ring network interfaces; multiple sets of carbonization chamber pressure monotonic subsystems and two control room switches form a ring network through the ring network interface.

[0045] The four switches also include two common switches, which are used to control the communication between the control system cabinet and the on-site control cabinet.

[0046] like Figure 5 As shown, it is a pressure value monitoring diagram of the coke oven carbonization chamber of the present invention. Each of the multiple monitoring operation stations is used to monitor the pressure parameter information of the corresponding coke oven carbonization chamber, wherein the pressure parameter information includes multiple pressure values and the pressure state corresponding to each pressure value; if any pressure value among the multiple pressure values exceeds the corresponding preset pressure value interval, a light flashing alarm is triggered; the pressure state is one of the following: normal, warning, danger; wherein one pressure state corresponds to one color display mode.

[0047] Among them, each set of carbonization chamber pressure monotonic subsystems in the multiple carbonization chamber pressure monotonic subsystems is also used to determine the water seal valve state of the corresponding coke oven carbonization chamber based on multiple pressure values, wherein the water seal valve state is the water seal valve open state or the water seal valve closed state.

[0048] In some embodiments, when any one of the multiple pressure values is greater than the preset water seal valve opening and closing threshold, the carbonization chamber pressure monotonic subsystem automatically opens the water seal valve, accelerates gas emission, reduces the gas collecting pipe pressure, and puts the gas collecting pipe pressure in a slightly positive pressure state, thereby making it easier for the raw gas to be introduced into the gas collecting system during coal loading, and avoiding excessive pressure inside the carbonization chamber in the early stage of coking. During the coking process, when the riser is opened, the raw gas in the carbonization chamber will inevitably be discharged into the atmosphere. Ignition of the raw gas through the riser opening ignition device can greatly reduce the pollution of the raw gas to the atmosphere. When any one of the multiple pressure values is less than the preset water seal valve opening and closing threshold, the carbonization chamber pressure monotonic subsystem automatically closes the water seal valve, reduces gas emission, maintains appropriate pressure, and prevents air backflow.

[0049] Each carbonization chamber pressure monotonic subsystem is equipped with two UPS power supplies, including a first UPS power supply and a second UPS power supply; when the first UPS power supply fails, the second UPS power supply starts.

[0050] In some embodiments, by configuring dual UPS power supplies, when one power supply fails, it immediately switches to the other power supply. The automatic power switching mechanism can reduce the downtime caused by power failure, thereby improving the reliability and stability of the carbonization chamber pressure monotonic subsystem.

[0051] Wherein, when the first UPS power supply or the second UPS power supply is in shutdown state, static bypass state or rectification and inversion state, the maintenance personnel performs maintenance operations.

[0052] In some embodiments, the problems of unstable power supply and poor water seal valve pressure regulation in the traditional coke oven carbonization chamber pressure control system are solved, and the problems of reduced coke quality and environmental pollution in the coke oven are solved; the power supply of the traditional coke oven carbonization chamber pressure control system is powered by a single UPS, and there is a lack of power monitoring. After the system is powered off, it cannot be discovered and repaired in a short time; the present invention sets a power detection relay at the UPS power input line to monitor power outages in real time and alarm, ensuring that the coke oven carbonization chamber pressure monotonic system responds in time and guarantees the stability of the coke oven carbonization chamber pressure control; two UPS power supplies are configured to achieve automatic switching and provide high-reliability power guarantee; further, communication redundancy is enhanced through a ring network interface and multiple switches to avoid control interruption due to communication failure; in the late coking stage of the traditional coke oven carbonization chamber, due to the poor pressure regulation characteristics of the water seal valve, the pressure cannot be adjusted, resulting in excessive negative pressure, affecting the coking quality, and generating excessive waste gas, aggravating environmental pollution. The present invention monitors the carbonization chamber pressure in real time through a monitoring operation station, and displays an alarm through status and color. Once the pressure value exceeds the limit, a flashing alarm is triggered, and the water seal valve status is adjusted in time to prevent abnormal pressure, reduce waste gas emissions, and improve coal gas recovery and coke quality.

[0053] In some embodiments, in order to further solve the third technical problem described in the background technology section, namely, "a plurality of carbonization chamber pressure monotonic subsystems are connected to a first number of monitoring and operating stations located in a centralized control center via optical fibers in a ring topology. When any node fails, normal communication of the entire network is affected. If a traditional redundant ring network is used, an additional set of optical fibers needs to be connected to the existing project, resulting in high project modification costs and difficulty in modifying the existing project." In some embodiments of the present invention, the coke oven carbonization chamber pressure monotonic system of the present invention further includes:

[0054] The centralized control center is also equipped with fixed standby access nodes and mobile standby access nodes, among which the fixed standby access nodes and mobile standby access nodes are both equipped with positioning modules and communication modules. The fixed standby access nodes and mobile standby access nodes communicate with the maintenance personnel terminal through the communication module, and regularly upload the location and usage status of the nodes; maintenance personnel can check the location and usage status of any node at any time on the maintenance personnel terminal; in practice, the usage status can be disabled, enabled, etc.; in practice, the location can be in the centralized control center or a control system cabinet; in addition, a backup ring network interface is configured for each switch in the ring network (including the control room switch and the ring network switch), and the number of backup ring network interfaces corresponds to the equipment connected to the switch.

[0055] For example, if two control room switches in a centralized control center need to connect to a first number of monitoring and operation stations, a number of backup ring network interfaces matching the first number will need to be configured. A sufficiency ratio can be set as needed. The number of backup ring network interfaces is calculated by multiplying the sufficiency ratio by the first number. If full sufficiency is achieved, the first number of backup ring network interfaces will be required. For ring network switches in the control system cabinet, one additional backup ring network interface will be required in addition to the two ring network interfaces.

[0056] When a communication failure occurs in the ring network, the backup ring network interface of each switch in the ring network is enabled in turn, and the ring network communication is detected to see if it is restored, so as to troubleshoot the faulty ring network interface; specifically, if the communication returns to normal after the i-th ring network interface is switched to the backup ring network interface, the i-th ring network interface is determined as the ring network interface to be repaired, and the 1st to i-1th ring network interfaces are determined as the ring network interfaces to be checked.

[0057] If the ring network communication is not restored after the backup ring network interfaces of all switches in the ring network are enabled in sequence, the faulty switch is checked; specifically, the control room switch is replaced in sequence by fixed backup access nodes, and the ring network switches in each control system cabinet are replaced in sequence by mobile backup access nodes, and it is detected whether the ring network communication is restored to check the faulty switch; specifically, when the communication is restored to normal after the nth switch is replaced, the nth switch is determined to be the faulty switch, and the 1st to n-1th switches are determined as switches to be checked.

[0058] On this basis, maintenance personnel can also view the location and usage status of any node through the maintenance personnel terminal. When the usage status of the mobile standby access node is enabled, they can further view which switch the mobile standby access node currently replaces, so as to carry out targeted maintenance or replacement.

[0059] In some embodiments, the problem of high cost of transformation of traditional redundant ring networks is solved. Compared with traditional redundant ring networks, the present invention does not require additional laying of optical fibers, thereby reducing the transformation cost. Specifically, by introducing fixed standby access nodes and mobile standby access nodes, combined with the dynamic switching mechanism of the standby ring network interface, rapid fault diagnosis and recovery of the ring network is achieved, and flexible troubleshooting means are provided to avoid the normal communication of the entire network being affected by single point failures, thereby improving network reliability and maintenance efficiency. Troubleshooting of traditional redundant ring networks often requires manual inspection and replacement of equipment one by one, which is time-consuming and affects system operation. In the present invention, maintenance personnel can view the node status in real time through the maintenance personnel terminal, accurately locate the fault point, and quickly repair or replace the faulty equipment, thereby improving maintenance efficiency.

[0060] The above descriptions are merely some preferred embodiments of the present invention and illustrate the underlying technical principles. Those skilled in the art should understand that the scope of the present invention is not limited to technical solutions formed by specific combinations of the aforementioned technical features. It also encompasses other technical solutions formed by any combination of the aforementioned technical features or their equivalents, without departing from the aforementioned inventive concept. For example, a technical solution formed by replacing the aforementioned features with (but not limited to) technical features with similar functions disclosed in this invention.

Claims

1. A coke oven carbonization chamber pressure monotonic system, characterized in that: include: Multiple carbonization chamber pressure monotonic subsystems are designed to match the number of coke ovens, with each two coke ovens sharing one carbonization chamber pressure monotonic subsystem. Each carbonization chamber pressure monotonic subsystem includes a control system cabinet and a field control cabinet. The field control cabinet serves as a remote substation of the control system and is directly connected to the field equipment. The control system cabinet is equipped with a DCS system, which collects data and controls field equipment through a fieldbus module. Each control system cabinet is connected to the field control cabinets on the tops of the two coke ovens via optical fiber. Each coke oven top gas collecting duct platform is equipped with multiple field control cabinets, which are connected using a star topology network. A plurality of monitoring and operating stations are provided to match the number of coke ovens, wherein a first number of the plurality of monitoring and operating stations are provided in a centralized control center, and the plurality of carbonization chamber pressure monotonic subsystems are connected to the first number of monitoring and operating stations provided in the centralized control center via optical fibers in a ring topology; the first number of monitoring and operating stations are connected to two control room switches provided in the centralized control center, and each control system cabinet is configured with four switches, including two ring network switches and two ordinary switches, and each ring network switch and each control room switch designates two optical fiber interfaces as ring network interfaces; By introducing fixed and mobile backup access nodes, maintenance personnel can view node status in real time through the maintenance personnel terminal. Two control room switches and two ring network switches form a ring network through the ring network interface. A backup ring network interface is configured for each switch in the ring network. When a communication failure occurs in the ring network, the backup ring network interface of each switch in the ring network is activated in sequence, and the ring network communication is tested to see if it has recovered, in order to identify the faulty ring network interface. If the ring network communication does not recover after the backup ring network interfaces of all switches in the ring network are activated in sequence, the faulty switch is identified. Each carbonization chamber pressure monotonic subsystem is equipped with two UPS power supplies; when the first UPS power supply fails, the second UPS power supply starts; when the first UPS power supply or the second UPS power supply is in shutdown state, static bypass state or rectifier inverter state, maintenance personnel can perform maintenance operations; Each monitoring operation station is used to monitor the pressure parameter information of the corresponding coke oven carbonization chamber. The pressure parameter information includes multiple pressure values and the pressure state corresponding to each pressure value. If any of the multiple pressure values exceeds the corresponding preset pressure value range, a light flashing alarm will be triggered.

2. The coke oven carbonization chamber pressure monotonic system according to claim 1, characterized in that: Also includes: A power detection relay is provided at the UPS power supply input line; The power detection relay is used to detect a power-off signal and transmit the power-off signal to the DCS system. After receiving the power-off signal, the DCS system performs an audible and visual alarm.

3. The coke oven carbonization chamber pressure monotonic system according to claim 2, characterized in that: The two common switches are used for controlling communication between the control system cabinet and the on-site control cabinet.

4. The coke oven carbonization chamber pressure monotonic system according to claim 3, characterized in that: The pressure status is one of the following: normal, warning, and danger; each pressure status corresponds to a color display mode.

5. The coke oven carbonization chamber pressure monotonic system according to claim 4, characterized in that: Each of the multiple carbonization chamber pressure monotonic subsystems is also used to determine the water seal valve state of the corresponding coke oven carbonization chamber based on the multiple pressure values, wherein the water seal valve state is the water seal valve open state or the water seal valve closed state.

Images