Single-hole coke oven carbonization chamber pressure control method based on SOPRECO system

Abstract

This disclosure presents an embodiment of a pressure control method for a single-hole coke oven carbonization chamber based on the SOPRECO system. A specific implementation of this method includes: acquiring the attribute information of the single-hole coke oven and the index values ​​of the coal entering the carbonization chamber; inputting the attribute information and index values ​​into a pre-trained operating parameter prediction model to obtain an operating parameter sequence for the single-hole coke oven carbonization chamber; sending the operating parameter sequence to the control system, so that the control system controls the pressure of the single-hole coke oven carbonization chamber based on the operating parameter sequence and real-time data collected by sensors; and achieving adaptive standard pressure value setting.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of coke production, specifically to a method for controlling the pressure of a single-hole coke oven carbonization chamber based on the SOPRECO system. Background Technology

[0002] The coal and coke chemical industry is a pillar industry of the metallurgical and chemical sectors, playing a vital and irreplaceable supporting role in my country's steel industry and national economic development. During the coking process, coke ovens release large amounts of smoke and dust, and emit pungent odors, resulting in significant fugitive emissions, severe environmental pollution, and damage to equipment and the oven body. The SOPRECO system, a single-hole carbonization chamber pressure regulation system, can effectively solve this problem. The SOPRECO system uses a single-adjustment valve (a hemispherical rotary valve structure) to continuously regulate the pressure in the single-hole carbonization chamber, maintaining a slight positive pressure at the bottom of the coke oven's carbonization chamber during the coking process. Simultaneously, it allows for negative pressure operation of the gas collecting pipe, thereby controlling the escape of raw coal gas and significantly reducing environmental pollution from emissions.

[0003] However, the inventors discovered that the following technical problems frequently arise when adjusting the carbonization chamber pressure through the SOPRECO system:

[0004] First, it requires manual setting of standard pressure values ​​for different stages. However, in the actual generation process, the setting of standard pressure values ​​depends on human experience and cannot achieve adaptive standard pressure value setting.

[0005] Second, when the SOPRECO system malfunctions, there is a lack of effective solutions, resulting in the release of fugitive emissions.

[0006] Third, harmful gases are easily generated during the production process. When they accumulate to a certain concentration, they can easily cause harm to the human body of production workers. Therefore, production workers need to wear protective equipment during work. However, some workers often fail to wear them correctly due to negligence or wishful thinking, which increases the risk of human harm. Summary of the Invention

[0007] The summary portion of this disclosure is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description portion. This summary portion is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0008] Some embodiments of this disclosure propose a method for controlling the pressure of a single-hole coke oven carbonization chamber based on the SOPRECO system, in order to solve one or more of the technical problems mentioned in the background section above.

[0009] Some embodiments of this disclosure provide a pressure control method for a single-hole coke oven carbonization chamber based on the SOPRECO system. The top of the single-hole coke oven carbonization chamber is connected to a riser pipe, and a riser pipe cover is installed at the top of the riser pipe. The riser pipe is connected to a gas collecting pipe via a bridge pipe. The SOPRECO system includes a single-adjustment valve and a control system. The single-adjustment valve is located between the bridge pipe and an isolation valve and is used to adjust the flow area of ​​raw gas at the bridge pipe. The method includes: acquiring the attribute information of the single-hole coke oven and the index values ​​of the coal entering the single-hole coke oven carbonization chamber; inputting the attribute information and index values ​​into a pre-trained operating parameter prediction model to obtain a sequence of operating parameter groups for the single-hole coke oven carbonization chamber. Each operating parameter group in the operating parameter group sequence corresponds to an operating stage. The operating parameter prediction model includes a sub-model for predicting parameters during the coal charging stage. The coking stage prediction sub-model, the coking stage prediction sub-model, and the coal charging stage parameter prediction sub-model take attribute information and index values ​​as input and output a first set of operating parameters. The coking stage prediction sub-model takes attribute information, index values, and the first set of operating parameters as input and outputs a second set of operating parameters. The coking stage prediction sub-model takes attribute information, index values, the first set of operating parameters, and the second set of operating parameters as input and outputs a third set of operating parameters. Each set of operating parameters includes an operating stage identifier and a desired pressure value. The operating stage identifier is used to represent one of the following stages: coal charging stage, coking stage, or coking stage. The sequence of operating parameter sets is sent to the control system so that the control system can control the pressure of the single-hole coke oven carbonization chamber based on the sequence of operating parameter sets and real-time data collected by sensors.

[0010] Optionally, before obtaining the attribute information of the single-hole coke oven and the index values ​​of the coal entering the carbonization chamber of the single-hole coke oven, the method further includes: adjusting the opening of the manual butterfly valve of the suction pipe to 70% to increase the adjustable range of the electro-hydraulic valve of the suction pipe; gradually closing the large circulation valve and controlling the suction force in front of the primary cooler within the first preset pressure range; while closing the large circulation valve, adjusting the electro-hydraulic valve of the suction pipe to ensure that the pressure of the gas collecting pipe is between 130Pa and 150Pa; and adjusting the electro-hydraulic valve of the suction pipe to automatic mode to interlock with the pressure of the gas collecting pipe.

[0011] Optionally, the control system controls the pressure in the carbonization chamber of the single-hole coke oven based on the sequence of operating parameters and real-time data collected by sensors, including: in response to determining that the first coke oven is in a non-coal-loading and coke-pushing state, activating all three sections of the gas collecting pipe of the first coke oven, and simultaneously adjusting the opening of the electro-hydraulic valve and the manual butterfly valve of the suction pipe of the second coke oven to keep the pressure in the gas collecting pipe of the second coke oven constant; and sending notification information to the central control equipment in the chemical production workshop.

[0012] Optionally, the method also includes: in response to receiving a fault signal, performing the following manual operations: the host computer screen in the main control room is set to manual position and the electrical output for opening and closing the valve is canceled; the gas source is checked on-site to ensure it is normal; during the coal loading stage, the water seal cover is closed first and then the isolation valve is opened; during the coking stage, the isolation valve is closed first and then the water seal cover is opened; the high and low pressure ammonia water ball valves are used as backups during the coal loading stage; when the flow rate of raw coal gas during the coal loading stage is greater than the preset flow rate threshold, the high and low pressure ammonia water ball valves are opened.

[0013] Optionally, the method also includes: selecting maintenance mode on the screen and selecting manual control; opening the single-acting cylinder vent valve to vent, opening both the upper and lower vent valves to vent; fixing and locking the fixing pin in the current position of the actuator. If the current valve position cannot be fixed and locked, it should be manually switched to the fixed and locked position and the fixing pin should be locked; under manual adjustment, maintain the carbonization chamber pressure above 150pa; when loading coal, open it to the fully open position and lock it; after loading coal, close it to 50%; after half an hour, adjust it to the corresponding position according to the carbonization chamber pressure and lock it.

[0014] Optionally, the method also includes: from before coal loading to the end of coal loading, the single-adjustment valve is in the fully open position; after coal loading is completed, a coal loading end signal is forcibly given to make the single-adjustment valve enter the working state; during the coking process, the valve position is manually set: the opening is set at 40%~50% for the first stage of coking, 30%~40% for the second stage, 25%~30% for the third stage, 20%~30% for the fourth stage, and 15%~20% for the fifth stage; during and after coking, the single-adjustment valve is in the open position; if no coking car signal is received, a coking signal is forcibly given to disengage the program, and the single-adjustment valve is manually fully opened and placed in the "waiting" state to wait for the next coal loading; from before coal loading to the end of coal loading, the single-adjustment valve is in the fully open position; after coal loading is completed, the timing begins; during preparation for coking and after coking, the single-adjustment valve is in the fully open position.

[0015] The embodiments disclosed above have the following beneficial effects: achieving adaptive standard pressure value setting. Specifically, by inputting the attribute information of the single-hole coke oven and the index values ​​of the coal entering the carbonization chamber of the single-hole coke oven into the operating parameter prediction model, an operating parameter set sequence is obtained. Then, the control system can control the pressure of the carbonization chamber of the single-hole coke oven according to the operating parameter set sequence and the real-time data collected by the sensors, thereby achieving adaptive standard pressure value setting. This eliminates the need for manual intervention, saves manpower and material resources, and improves the stability of the carbonization chamber pressure. Attached Figure Description

[0016] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and elements are not necessarily drawn to scale.

[0017] Figure 1 This is a partial structural diagram of the coke oven discharge pipe of a single-hole coke oven equipped with the SOPRECO system;

[0018] Figure 2 This is a flowchart of some embodiments of the single-hole coke oven carbonization chamber pressure control method based on the SOPRECO system according to the present disclosure;

[0019] Figure 3 This is a schematic diagram of an exemplary structure for a running parameter prediction model. Detailed Implementation

[0020] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure 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 this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0021] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0022] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0023] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0024] The names of messages or information exchanged between multiple devices in the embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.

[0025] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Figure 1A partial structural schematic diagram of the coke oven discharge pipe of a single-hole coke oven equipped with the SOPRECO system is shown. Figure 1 As shown, the top 101 of the single-hole coke oven is connected to a riser pipe 102, which connects the coking chamber to the riser pipe 102. Raw coal gas rises and enters the riser pipe 102. The riser pipe 102 is connected to the gas collecting pipe 104 via a bridge pipe 103, allowing the raw coal gas to enter the gas collecting pipe 104 through the bridge pipe 103. The SOPRECO system includes a single-adjustment valve 106 and a control system. The single-adjustment valve 106 is located between the bridge pipe 103 and the isolation valve, used to adjust the flow area of ​​the raw coal gas at the bridge pipe 103. The isolation valve (not shown in the figure) is located in the bridge pipe 103 below the single-adjustment valve 106.

[0027] In addition, ammonia nozzle 107, steam nozzle 108, and water seal cover 109 can be installed above bridge pipe 103. The control system can control the opening of the monotonic valve 106 through a pneumatic actuator, thereby adjusting the flow area of ​​raw coal gas at bridge pipe 103. To ensure normal coal charging operations during the commissioning of the coke oven carbonization chamber pressure regulation system or in case of failure, high-pressure ammonia water is reserved as a backup.

[0028] Continue to refer to Figure 2 The flowchart 200 illustrates some embodiments of a single-hole coke oven carbonization chamber pressure control method based on the SOPRECO system according to this disclosure. The control method includes the following steps:

[0029] Step 201: Obtain the attribute information of the single-hole coke oven and the index values ​​of the coal entering the carbonization chamber of the single-hole coke oven.

[0030] In some embodiments, the execution entity of the single-hole coke oven carbonization chamber pressure control method based on the SOPRECO system can be a PLC controller or a computing device. Based on this, the attribute information of the single-hole coke oven carbonization chamber and the index values ​​of the coal entering the single-hole coke oven carbonization chamber can be obtained. The attribute information of the single-hole coke oven may include, but is not limited to: the size of the carbonization chamber, the thickness of the carbonization chamber walls, the effective volume of the carbonization chamber, the geographical location information of the single-hole coke oven, etc. The coal index values ​​are the values ​​of multiple indicators of the coal, including but not limited to: coal moisture content, coal ash content, coal volatile matter, coal composition, etc. As needed, technicians can input the attribute information of the single-hole coke oven and the coal index values ​​into the execution entity. Alternatively, the attribute information of the single-hole coke oven and the coal index values ​​can be read from a database. As needed, the execution entity can also communicate with an automatic analysis platform to read the coal index values ​​analyzed by the automatic analysis platform.

[0031] Step 202: Input the attribute information and index values ​​into the pre-trained operating parameter prediction model to obtain the operating parameter set sequence of the single-hole coke oven carbonization chamber.

[0032] In some embodiments, each operating parameter group in the sequence of operating parameter groups corresponds to an operating stage. The operating parameter prediction model includes a coal charging stage parameter prediction sub-model, a coking stage prediction sub-model, and a coking stage prediction sub-model. The coal charging stage parameter prediction sub-model takes attribute information and index values ​​as input and outputs a first operating parameter group. The coking stage prediction sub-model takes attribute information, index values, and the first operating parameter group as input and outputs a second operating parameter group. The coking stage prediction sub-model takes attribute information, index values, and the second operating parameter group as input and outputs a third operating parameter group. Each operating parameter group includes an operating stage identifier and a desired pressure value. The operating stage identifier is used to characterize one of the following stages: coal charging stage, coking stage, and coking stage.

[0033] In some embodiments, such as Figure 3 As shown, the operating parameter prediction model includes a coal charging stage parameter prediction sub-model 301, a coking stage prediction sub-model 302, and a coking stage prediction sub-model 303. The coal charging stage parameter prediction sub-model 301 takes attribute information and index values ​​as input and outputs a first operating parameter group 304. The coking stage prediction sub-model 302 takes attribute information, index values, and the first operating parameter group 304 as input and outputs a second operating parameter group 305. The coking stage prediction sub-model 303 takes attribute information, index values, and the second operating parameter group 305 as input and outputs a third operating parameter group 306.

[0034] In some embodiments, the coal charging stage parameter prediction sub-model 301, the coking stage prediction sub-model 302, and the coking stage prediction sub-model 303 all use a recurrent neural network (RNN) as the initial model. Based on this, the initial model is trained using a historical operating dataset. Training stops when the training termination condition is met, resulting in the coal charging stage parameter prediction sub-model 301, the coking stage prediction sub-model 302, and the coking stage prediction sub-model 303. The historical operating dataset includes sample attribute information and sample index values, as well as the sequence of operating parameter groups corresponding to the sample attribute information and sample index values. The sequence of operating parameter groups is obtained by sequentially arranging the first, second, and third operating parameter groups. Each operating parameter group includes an operating stage identifier and a desired pressure value (standard pressure value).

[0035] Step 203: Send the sequence of operating parameters to the control system so that the control system can control the pressure of the single-hole coke oven carbonization chamber according to the sequence of operating parameters and the real-time data collected by the sensor.

[0036] In some embodiments, the aforementioned actuator is communicatively connected to the control system, thereby sending a sequence of operating parameters to the control system. The control system can then adjust the pressure based on real-time data collected by the sensors and the sequence of operating parameters, adjusting the opening of the monotonic valve to make the actual pressure value approach the standard pressure value.

[0037] For example, during the coal loading stage, the riser cover is closed, and the control system automatically adjusts the opening of the monotonic valve according to the actual pressure value and the standard pressure value of the coal loading stage. This allows the raw coal gas to be evenly introduced into the gas collecting pipe, thereby achieving automatic adjustment of the carbonization chamber pressure. This, in turn, ensures that the negative pressure operation of the gas collecting pipe has sufficient suction force on the carbonization chamber, guaranteeing that the raw coal gas does not leak out.

[0038] During the coking stage, the control system adjusts based on the actual pressure value and the standard pressure value during the coal charging stage. At this time, the standard pressure value can be set to 0.2 MPa. This maintains a slightly positive pressure in the carbonization chamber and a negative pressure operation in the gas collecting pipe, drawing coal dust into the gas collecting pipe and reducing pollutant emissions. In the early stages of coking, negative pressure control is implemented in the carbonization chamber; in the late stages of coking, negative pressure control is implemented (standard pressure value set to 5 Pa) to prevent excessive pressure in the carbonization chamber from causing smoke from the furnace door and air intake due to negative pressure in the carbonization chamber, which could affect the coke oven's lifespan and cause leaks. Furthermore, the single-hole carbonization chamber pressure regulation system can completely isolate the carbonization chamber from the gas collecting pipe, achieving negative pressure operation in the gas collecting pipe and reducing the emission of dust and pollutants. Additionally, a feedforward / feedback PID control method is used to control the pneumatic actuator to adjust the position of the water seal valve, maintaining a slightly positive pressure in the carbonization chamber. The real-time data collected by the sensors includes the gas pressure signal in the single-hole carbonization chamber riser pipe and the feedback signal of the water seal valve's position opening. It should be noted that the method of adjusting the opening of the monotonic valve in the SOPRECO system to make the actual pressure value approach the standard pressure value is an inherent function of the SOPRECO system, and will not be elaborated here.

[0039] The methods provided in some embodiments of this disclosure achieve adaptive standard pressure setting. Specifically, by inputting the attribute information of a single-hole coke oven and the index values ​​of the coal entering the carbonization chamber of the single-hole coke oven into an operating parameter prediction model, an operating parameter set sequence is obtained. Then, the control system can control the pressure of the carbonization chamber of the single-hole coke oven according to the operating parameter set sequence and the real-time data collected by the sensors, thereby achieving adaptive standard pressure setting without manual intervention, saving manpower and material resources, and improving the stability of the carbonization chamber pressure.

[0040] In some optional implementations of certain embodiments, before obtaining the attribute information of the single-hole coke oven and the index values ​​of the coal entering the carbonization chamber of the single-hole coke oven, the above method further includes the following steps:

[0041] Step 1: Manually adjust the opening of the suction pipe manual butterfly valve to 70% to increase the adjustable range of the electro-hydraulic valve of the suction pipe. The suction pipe is connected to the riser pipe through the primary cooler, so as to cool the raw gas in the riser pipe and then export it for further processing. Both the suction pipe manual butterfly valve and the electro-hydraulic valve of the suction pipe can be used to adjust the flow area of the suction pipe.

[0042] Step 2: Gradually close the large circulation valve and control the suction before the primary cooler within the first preset pressure range (-1000 ± 50 Pa).

[0043] Step 3: While closing the large circulation valve, adjust the electro-hydraulic valve of the suction pipe to ensure that the pressure of the riser pipe is between 130 - 150 Pa.

[0044] Step 4: Adjust the electro-hydraulic valve of the suction pipe to the automatic mode to be interlocked with the pressure of the riser pipe. Thus, the preparation before starting the SOPRECO system is achieved.

[0045] In some optional implementation manners of some embodiments, the control system controls the pressure of the single-hole coke oven carbonization chamber according to the sequence of operation parameter groups and the real-time data collected by the sensors, including the following steps:

[0046] Step 1: In response to determining that the first coke oven is in the state of not charging coal and pushing coke, to ensure that the generation amount of raw gas is relatively balanced and stable, put all the SOPRECO systems of the three-section riser pipe of the first coke oven into operation, and at the same time adjust the opening of the electro-hydraulic valve and manual valve of the suction pipe of the second coke oven so that the pressure of the riser pipe of the second coke oven remains unchanged;

[0047] Step 2: Send a notification message to the central control equipment of the chemical production workshop. The electro-hydraulic regulating valve of the suction pipe controls the pressure of the riser pipe to be +50 Pa, and ensures the stability of the pressure of the first-section riser pipe, and the pressure fluctuation of the riser pipe is controlled within ±30 Pa. The PLC controller is communicatively connected to the central control equipment of the chemical production workshop. The PLC controller is communicatively connected to other devices or systems through OPC or bus. The chemical production workshop is used for the recovery of chemical by-products, such as recovering tar, crude benzene and gas in the gas. Through communicatively connecting with the central control equipment of the chemical production workshop, the linkage of each production process can be achieved.

[0048] In these implementation manners, the first coke oven and the second coke oven are in a group for sequential coke pushing. Therefore, when starting the SOPRECO system of the first coke oven, it is necessary to monitor the pressure of the riser pipe of the second coke oven at the same time, so as to ensure the stability of the pressure of the riser pipe of the second coke oven and avoid affecting the second coke oven.

[0049] In some optional implementations of certain embodiments, in order to address the second technical problem described in the background section, namely, "when the SOPRECO system malfunctions, there is a lack of effective solutions, resulting in the release of fugitive emissions," the methods of some embodiments of this disclosure further include the following steps:

[0050] Upon receiving a fault signal or detecting a pressure value exceeding the warning value, the following manual actions will be performed;

[0051] The main control room's host computer screen is set to manual mode, and the valve opening and closing electrical outputs are disabled.

[0052] On-site inspection to ensure the gas supply is functioning properly;

[0053] When loading coal, first close the water seal cover, then open the isolation valve; when pushing coke (coke discharge stage), first close the isolation valve, then open the water seal cover. The high and low pressure ammonia water ball valves are reserved for use during coal loading. When the flow rate of raw coal gas exceeds a preset flow threshold, the high pressure ball valve opens. In practice, the opening and closing are controlled manually via the solenoid valve group buttons inside the gas control cabinet.

[0054] Furthermore, select the maintenance mode in the control interface and choose manual control to observe whether the pressure in the control cabinet is normal; the control interface can be an HMI (human-machine interface).

[0055] Open the single-acting cylinder vent valve to vent the air; open both the upper and lower vent valves to vent the air.

[0056] Fix and lock the fixing pin in the current position of the actuator. If the current valve position cannot be fixed and locked, manually switch it to the fixed and locked position and lock the fixing pin.

[0057] When manually adjusted, maintain the carbonization chamber pressure above 150 Pa;

[0058] During the coal loading stage, open the valve to the fully open position and lock it. After coal loading is completed, close it to 50%. Half an hour later, adjust it to the appropriate position according to the pressure of the carbonization chamber and lock it.

[0059] Furthermore, the single-adjustment valve is in the fully open position from before coal loading to the end of coal loading. After coal loading is completed, a coal loading end signal is forcibly given to make the single-adjustment valve enter the working state.

[0060] During the coking process, the valve position is manually set. The opening is set to 40-50% for the first stage of coking, 30-40% for the second stage, 25-30% for the third stage, 20-30% for the fourth stage, and 15-20% for the fifth stage.

[0061] During and after coking, the single-action valve should be in the open position. If no signal is received from the coking car, a forced coking signal should be given to disengage the program. The valve should be manually fully opened and placed in the "waiting" state to wait for the next coal loading.

[0062] The single-adjustment valve should be fully open from before coal loading to the end of coal loading. The timer should start after coal loading is completed.

[0063] The valves should be fully open during and after coke removal.

[0064] Therefore, by setting up a manual operation procedure, the problem of lack of effective solutions when the SOPRECO system malfunctions, resulting in the escape of fugitive emissions, is solved, thereby reducing pollution emissions during malfunctions.

[0065] In some optional implementations of certain embodiments, in order to solve the third technical problem described in the background section, namely, "harmful gases are easily generated during the production process, and when they accumulate to a certain concentration, they can easily cause harm to the human body of production personnel. Therefore, production personnel need to wear protective equipment during work. However, some workers often fail to wear them correctly due to negligence or wishful thinking, increasing the risk of human harm," some embodiments of this disclosure further include the following steps:

[0066] The real-time concentration of harmful gases in multiple areas of the factory is obtained by installing multiple harmful gas concentration detection devices in the factory area.

[0067] When the real-time concentration of harmful gases in any of the aforementioned areas exceeds a first preset concentration threshold, an early warning message is pushed to the terminals of all production personnel located within that area. Each production personnel is equipped with a production personnel terminal, which is used to receive various prompts and collect information such as images within the factory area.

[0068] The scope of each area is predetermined. For example, different areas can be divided according to the production process, with each area corresponding to a production process. This creates an electronic map of the factory area that maps to the actual production equipment, and the boundaries of each area are marked on the electronic map.

[0069] When the real-time concentration of harmful gas in any of the above-mentioned areas exceeds the second preset concentration threshold, a broadcast message is issued so that all personnel in the factory area can receive the alert. Afterwards, images of production personnel are collected by multiple image acquisition devices installed in the factory area.

[0070] The aforementioned images of production personnel are input into the protective equipment detection model to obtain protective equipment detection information, which characterizes the status of production personnel wearing protective gear. The protective equipment detection information includes the location of the protective product, the name of the protective product, and the wearing status. For example, the protective equipment detection information includes a bounding box indicating the location of the protective product, the name of the protective product, and the wearing status.

[0071] The protective detection model can be a convolutional neural network. Based on this, manually labeled images of production workers wearing all, some, or no protective equipment are used as training samples. Machine learning methods are then used to train the aforementioned convolutional neural network to obtain the protective detection model.

[0072] The system determines whether the protective detection information meets the preset protective standards (meets the preset protective conditions). If it does not meet the standards, it pushes a notification and the aforementioned protective detection information to the terminals of the corresponding production personnel and the personnel patrolling the area. This allows the patrol personnel in that area to conduct targeted inspections.

[0073] The corresponding production personnel can view the above prompts and protection detection information on their production personnel terminals. If the protection detection information is incorrect, the production personnel can take a partial image of the corresponding area using their production personnel terminal and upload it to appeal the error. The production personnel terminal can be a handheld PDA or a smartphone. For example, if the protection detection information indicates that protective products are not being worn on the hands, the production personnel can take an image of the hands.

[0074] Therefore, by monitoring the real-time concentration of harmful gases, and when the real-time concentration of harmful gases exceeds the second preset concentration threshold, images of the factory area are collected to remind production personnel who are not wearing the correct protective gear, and a complaint channel is provided. This enables timely detection and effective supervision of the wearing of protective gear, thus avoiding harm to the health of production personnel.

[0075] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A method for pressure control of a single-hole coke oven carbonization chamber based on a SOPRECO system, wherein a riser pipe is connected to the top of the single-hole coke oven carbonization chamber, a riser pipe cover is provided on the top of the riser pipe, the riser pipe is connected to a gas collecting pipe through a bridge pipe, the SOPRECO system includes a single-adjustment valve and a control system, the single-adjustment valve is disposed between the bridge pipe and an isolation valve, and is used to adjust the flow area of ​​raw gas at the bridge pipe, the method comprising: Obtain the attribute information of a single-hole coke oven and the index values ​​of the coal entering the carbonization chamber of the single-hole coke oven. The attribute information of the single-hole coke oven includes the size of the carbonization chamber, the thickness of the carbonization chamber wall, the effective volume of the carbonization chamber, and the geographical location information of the single-hole coke oven. The coal index values ​​include coal moisture content, coal ash content, coal volatile matter, and coal composition. The attribute information and the index values ​​are input into a pre-trained operating parameter prediction model to obtain the operating parameter group sequence of the single-hole coke oven carbonization chamber. Each operating parameter group in the operating parameter group sequence corresponds to an operating stage. The operating parameter prediction model includes a coal charging stage parameter prediction sub-model, a coking stage prediction sub-model, and a coking stage prediction sub-model. The coal charging stage parameter prediction sub-model, the coking stage prediction sub-model, and the coking stage prediction sub-model all use a recurrent neural network as the initial model. The initial model is trained using a historical operating dataset. When the training termination condition is met, the training is stopped, and the coal charging stage parameter prediction sub-model, the coking stage prediction sub-model, and the coking stage prediction sub-model are obtained. The coal charging stage parameter prediction sub-model takes the attribute information and the index value as input and outputs a first set of operating parameters. The coking stage prediction sub-model takes the attribute information, the index value, and the first set of operating parameters as input and outputs a second set of operating parameters. The coking stage prediction sub-model takes the attribute information, the index value, the first set of operating parameters, and the second set of operating parameters as input and outputs a third set of operating parameters. Each set of operating parameters includes an operating stage identifier and a desired pressure value. The operating stage identifier is used to characterize one of the following stages: coal charging stage, coking stage, and coking stage. The operating parameter set sequence is sent to the control system so that the control system controls the pressure of the single-hole coke oven carbonization chamber according to the operating parameter set sequence and the real-time data collected by the sensor. The real-time data collected by the sensor includes the gas pressure signal of the riser pipe of the single-hole carbonization chamber and the position opening feedback signal of the water seal valve.

2. The method according to claim 1, characterized in that, Before obtaining the attribute information of the single-hole coke oven and the index values ​​of the coal entering the carbonization chamber of the single-hole coke oven, the method further includes: Adjust the opening of the manual butterfly valve in the suction pipe to 70% to increase the adjustable range of the electro-hydraulic valve in the suction pipe. Gradually close the large circulation valve and control the suction in front of the primary cooler within the first preset pressure range; While closing the large circulation valve, the electro-hydraulic valve of the suction pipe is adjusted so that the pressure of the gas collecting pipe is between 130Pa and 150Pa. Adjust the electro-hydraulic valve of the intake pipe to automatic mode to interlock with the pressure of the gas collection pipe.

3. The method according to claim 2, characterized in that, The control system controls the pressure of the single-hole coke oven carbonization chamber based on the sequence of operating parameters and real-time data collected by sensors, including: In response to the determination that the first coke oven is in a non-coal-loading and coke-pushing state, the SOPRECO system of the three gas collecting pipes of the first coke oven is fully put into operation, and at the same time the opening of the electro-hydraulic valve and the manual butterfly valve of the gas suction pipe of the second coke oven is adjusted so that the pressure of the gas collecting pipe of the second coke oven remains unchanged. Send notification information to the central control equipment in the chemical production workshop.

4. The method according to claim 3, characterized in that, The method further includes: Upon receiving a fault signal, perform the following manual operation; The main control room's host computer screen is set to manual mode, and the valve opening and closing electrical outputs are disabled. On-site inspection to ensure the gas supply is functioning properly; During the coal loading stage, the water seal cover is closed first, and then the isolation valve is opened. During the coking stage, the isolation valve is closed first, and then the water seal cover is opened. The high and low pressure ammonia water ball valves are used as backups during the coal loading stage. When the flow rate of raw coal gas during the coal loading stage is greater than the preset flow rate threshold, the high and low pressure ammonia water ball valves are opened.

5. The method according to claim 4, characterized in that, The method further includes: Select the maintenance mode on the screen and choose manual control; Open the single-acting cylinder vent valve to vent the air; open both the upper and lower vent valves to vent the air. Fix and lock the retaining pin in the current position of the actuator. If the current valve position cannot be fixed and locked, manually switch it to the fixed and locked position and lock the retaining pin. When manually adjusted, maintain the carbonization chamber pressure above 150 Pa; When loading coal, open the valve to the fully open position and lock it. After loading coal is completed, close it to 50%. Half an hour later, adjust it to the appropriate position according to the pressure of the carbonization chamber and lock it.

6. The method according to claim 5, characterized in that, The method further includes: Before coal loading and after coal loading, the single-adjustment valve is in the fully open position. After coal loading is completed, a coal loading end signal is forcibly given to make the single-adjustment valve enter the working state. During the coking process, the valve position is manually set. The opening is set to 40%~50% for the first stage of coking, 30%~40% for the second stage, 25%~30% for the third stage, 20%~30% for the fourth stage, and 15%~20% for the fifth stage. During and after coking, the single-adjustment valve is in the open position; if no coking car signal is received, a coking signal is forcibly given to disengage the program, and the single-adjustment valve is manually fully opened and placed in the "waiting" state to wait for the next coal loading. The single-adjustment valve is in the fully open position from before coal loading to the end of coal loading. The timer starts after coal loading is completed. The monotonic valve is in the fully open position during preparation for coking and after coking.

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