Drainage control system for water seal tank of coke oven

Abstract

The invention relates to the field of coking coke oven dust removal, in particular to a coke oven water seal tank drainage control system which is applied to a water seal tank, and a machine vision unit is used for identifying and judging whether a drainage branch pipe is blocked or not and the turbid state of water drained by the drainage branch pipe, and sending a judgment result and the turbid state to a main control unit; the main control unit is mounted below the water seal tank or in the power distribution room, and is used for receiving a signal of the machine vision unit and controlling the unblocking unit according to a judgment result and a turbid state; the production acquisition unit is arranged in the centralized control room and is used for acquiring coke discharging and coal charging plans of the coke oven and acquiring a target oven number of a coke oven vehicle; the vehicle-mounted control unit is installed in a coke oven vehicle distribution room and used for collecting vehicle information and transmitting the collected vehicle information to the main control unit through wireless communication. The unblocking unit utilizes high-pressure water to wash oil sludge of the water seal tank drainage branch pipe, and unblocking is achieved. Dynamic drainage can be realized according to dust settling time, drainage frequency is intelligently controlled, and the problem of coke powder deposition is effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of coking coke oven dust removal, and particularly relates to a coke oven water seal tank drainage control system. BACKGROUND

[0002] In modern coke oven production, the coke side is the key control point of coke oven unorganized emission. The water seal tank becomes the most reliable and effective dynamic sealing device in the industry due to its zero leakage sealing advantage. The coke or coal smoke contains a large amount of volatile condensation formed tar, which is in contact with the water in the water seal tank, and is extremely easy to wrap the coke powder particles in the smoke into viscous and dense oil sludge-like precipitates.

[0003] For coke powder deposition, the existing method is a periodic manual drainage, U-shaped pipe with scraper and manual cleaning method. Due to the fact that coke powder is extremely easy to deposit and has high viscosity, periodic drainage can only discharge the coke powder near the drainage port, and cannot discharge the coke powder between the two drainage ports, even if the drainage frequency is increased. The scraper of the U-shaped pipe is extremely easy to be stuck and damaged due to the great resistance of viscous oil sludge, and the mechanical failure point is increased, which is difficult to maintain. Manual cleaning needs to interrupt production, and the water in the water seal tank needs to be completely discharged, and the direction of a large amount of discharged waste water becomes a pain point in the industry.

[0004] Due to the limitations of the existing drainage and cleaning methods, more and more coke powder is deposited in the water seal tank, thereby causing a series of systematic failures such as U-shaped pipe leakage, water seal tank corrosion, drainage pipe blockage, and sealing failure. Therefore, an intelligent drainage control method needs to be provided. SUMMARY

[0005] According to the above technical problems, a coke oven water seal tank drainage control system is provided. The present application mainly utilizes a main control unit, a machine vision unit, a production acquisition unit, a vehicle-mounted control unit and a blockage cleaning unit, dynamically drains according to the dust settling time, intelligently controls the drainage frequency, and effectively solves the coke powder deposition problem.

[0006] The technical means adopted by the present application are as follows: The coke oven water seal tank drainage control system is applied to the water seal tank and comprises a main control unit, a machine vision unit, a production acquisition unit, a vehicle-mounted control unit and a blockage cleaning unit, wherein the machine vision unit is used for identifying and judging whether the drainage branch pipe is blocked and the turbidity state of the water discharged by the drainage branch pipe, and sending the judgment result and the turbidity state to the main control unit; the main control unit is installed below the water seal tank or in the power distribution room, is used for receiving the signal of the machine vision unit, and controls the blockage cleaning unit according to the judgment result and the turbidity state; the production acquisition unit is arranged in the centralized control room, is used for acquiring the coke oven coking and coal charging plan, and acquiring the target oven number of the coke oven vehicle; the vehicle-mounted control unit is installed in the power distribution room of the coke oven vehicle, is used for acquiring the vehicle information, and transmitting the acquired vehicle information to the main control unit through wireless communication; the blockage cleaning unit uses high-pressure water to flush the oil sludge of the water seal tank drainage branch pipe, so that the blockage is cleaned.

[0007] Further, the machine vision unit comprises an intelligent camera, a data processing system, a moving track, a servo drive system and a wireless network bridge system; the moving track is laid along the water seal tank, the moving track is arranged in parallel with the water seal tank drainage main pipeline, the servo drive system and the intelligent camera are installed on the moving track, and the servo drive system is used for controlling the intelligent camera to move on the moving track; the data processing system is used for judging whether the drainage branch pipe is blocked and the turbidity state of the water discharged by the drainage branch pipe according to the image information collected by the intelligent camera, and sending the judgment result and the turbidity state to the main control unit through the wireless network bridge system.

[0008] Further, the main control unit adopts a PLC controller to realize a distributed structure and a user-friendly HMI interface operation, and communicates with other units through an industrial communication protocol.

[0009] Further, the production acquisition unit communicates with the coke oven production system through an industrial communication protocol, acquires the coke oven coking and coal charging plan, and acquires the target oven number of the coke oven vehicle.

[0010] Further, the vehicle information acquired by the vehicle-mounted control unit comprises a vehicle interlocking signal, a real-time position signal and an oven door switch signal.

[0011] Further, the blockage cleaning unit comprises a high-pressure water pump, a blockage cleaning main pipeline, a blockage cleaning branch pipeline and a branch pipeline valve, the high-pressure water pump is installed in the water seal tank water pipeline, the blockage cleaning main pipeline is laid along the water seal tank drainage main pipeline, the blockage cleaning branch pipeline is installed at the water seal tank drainage branch pipeline, the branch pipeline valve is installed between the blockage cleaning branch pipeline and the blockage cleaning main pipeline, and the blockage cleaning branch pipeline is controlled individually through the opening and closing of the branch pipeline valve; when the drainage branch pipe is blocked, the blockage cleaning branch pipeline high-pressure water flow acts on the drainage branch pipe valve to flush the upper part of the drainage branch pipe, the high-pressure water column dilutes the oil sludge to remove the blockage, and the blockage cleaning is achieved.

[0012] Compared with the prior art, the present invention has the following advantages: The coke oven water seal tank drainage control system provided by this invention, through a main control unit, machine vision unit, production acquisition unit, vehicle-mounted control unit, and unblocking unit, coordinates with the coke oven vehicle and coke oven production system to precisely control the drainage volume, save water resources, and solve the problem of unmanageable water resources in the water seal tank. This invention utilizes a high-pressure water flushing method to dilute the viscous sludge that causes blockages, thus achieving the purpose of unblocking. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is the control logic diagram of the coke oven water seal tank drainage control system of the present invention.

[0015] Figure 2 This is a schematic diagram of the unblocking unit in an embodiment of the present invention.

[0016] Figure 3 This is the iterative training model for the neural network in this invention.

[0017] In the diagram: 1. Water seal trough; 2. Main drainage pipe of water seal trough; 3. Servo drive system; 4. Smart camera; 5. Electric drainage valve of water seal trough; 6. Branch drainage pipe of water seal trough; 7. Moving track; 8. Unblocking branch pipe; 9. Branch valve; 10. Unblocking main pipe; 11. Observation hole. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] It is also important to note that the use of terminology such as "example," "exemplary," etc. should not be construed to imply that other examples are less desirable or less effective. That which is meant by "exemplary" is a example, not a limitation. Thus, the term "exemplary" is used herein to merely mean an example, not an ideal or a preferred example. Moreover, it is to be understood that the phraseology and terminology used herein is for the purpose of description and explanation only, and should not be considered as limiting. As used herein, the singular form "a", "an" and "the" include plural references unless the context clearly dictates otherwise. As used herein, the term "includes" and / or "including" means including, but not limited to.

[0021] The relative arrangements of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the application unless specifically so stated. It is also to be understood that the dimensions of the various parts shown in the drawings are not drawn to scale for ease of illustration. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered part of the specification as appropriate. In all examples shown and discussed herein, any specific values are to be interpreted as merely exemplary and not limiting. Thus, other examples of the exemplary embodiments can have different values. It is to be noted that like numbers and letters refer to like elements throughout the several views of the drawings and that, as such, detailed discussion of the elements incorporated into the drawings is not required in further discussion of the drawings.

[0022] As shown in Figure 1 The present application provides a coke oven water seal tank drainage control system, which is applied to a water seal tank 1 and includes a master control unit, a machine vision unit, a production acquisition unit, a vehicle-mounted control unit, and a blockage cleaning unit. The master control unit is connected to the machine vision unit, the production acquisition unit, and the vehicle-mounted control unit. The machine vision unit is connected to the production acquisition unit. The production acquisition unit is connected to the vehicle-mounted control unit. The vehicle-mounted control unit is connected to the blockage cleaning unit. The machine vision unit is used to identify and determine whether the drainage branch pipe is blocked and the turbidity state of the water discharged by the drainage branch pipe, and sends the determination result and the turbidity state to the main control unit; in the specific implementation, as a preferred embodiment of the present application, the machine vision unit comprises an intelligent camera 4, a data processing system, a moving track 7, a servo drive system 3, and a wireless bridge system; the moving track 7 is laid along the water seal groove, and the moving track 7 is arranged in parallel with the drainage main pipe 2 of the water seal groove, with a vertical distance of about 1.0 meters from the drainage main pipe, the servo drive system 3 and the intelligent camera 4 are installed on the moving track 7, and the servo drive system 3 is used to control the intelligent camera 4 to move on the moving track 7; the running speed is 0-1.5 m / s (stepless speed change), and the positioning accuracy is ±0.5 mm. A square hole observation hole 11 of 15x25 cm is opened in the downstream direction of the water flow of each drainage branch pipe of the drainage main pipe, and the drainage main pipe is painted green. The intelligent camera 4 adopts a 25 million industrial color camera, is configured with a light source, processes image information by using a Sherlock advanced machine vision software of Teledyne Dalsa Company, and identifies image information in the observation hole 11 by using a neuron network method, so as to determine whether water flow passes through the pipe and the turbidity degree of the water flow, and a neuron network iterative training model is shown in Figure 3 The data processing system is used to determine whether the drainage branch pipe is blocked and the turbidity state of the water discharged by the drainage branch pipe according to the image information collected by the intelligent camera 4, and sends the determination result and the turbidity state to the main control unit by using the wireless bridge system.

[0023] In the implementation, LED light sources are installed on the left and right sides of the intelligent camera 4, and are irradiated in the drainage main pipe and the observation hole 11, the color in the observation hole 11 is dark, the observation hole 11 is segmented and positioned by using an image gray scale segmentation algorithm, first, a gray scale binary processing is performed, a region of the observation hole 11 is obtained according to a set parameter size, a central region of the observation hole 11 is accurately calculated again according to the obtained region, finally, a sobel 8 direction operator (the larger the number in the operator, the smaller the edge with a small difference between brightness and darkness can be found) is used to find the edge of the observation hole 11, to complete accurate positioning, and to collect picture information in the observation hole 11 to learn and analyze whether there is water flow and the turbidity state of the water flow, and the Sobel 8 direction edge detection operator is as follows:

[0024] In the operation process of finding the edge, a maximum inter-class variance method is used to calculate the binary threshold, so as to reduce the influence of night and environmental light, T is taken as the segmentation threshold of the foreground and the background, the proportion of the foreground point number to the picture is , the average gray scale is , the proportion of the background point number to the image is , the average gray scale is , and the total average gray scale of the image is , the image variance of the foreground and the background is: , 2 2 The two formulas are combined to obtain: 2 When gmax, the foreground and background difference can be considered to be the largest, and the gray scale T at this time is the best threshold value. The information of whether there is water flow and the turbidity state of the water flow analyzed by the machine vision system is finally transmitted to the main control unit through the wireless network bridge, and the main control unit completes the closing action of the corresponding branch valve and the opening and closing action of the cleaning valve.

[0025] The main control unit is installed below the water seal tank 1 or in the power distribution room, and is used to receive the signals of the machine vision unit and control the cleaning unit according to the judgment result and the turbidity state; in the specific implementation, as a preferred embodiment of the present application, the main control unit adopts a PLC controller, which is suitable for a programmable controller in a medium-high performance range, realizes a distributed structure and a user-friendly HMI interface operation, and communicates with other units through an industrial communication protocol. In the implementation, the Profinet, Modbus RTU, Modbus TCP communication protocol or other open industrial communication protocols can be used to communicate with other units of the system.

[0026] The production acquisition unit is arranged in the centralized control room, and is used to acquire the coke oven out of coke and charging plan, and acquire the target oven number of the coke oven vehicle; in the specific implementation, as a preferred embodiment of the present application, the production acquisition unit communicates with the coke oven production system through an industrial communication protocol, acquires the coke oven out of coke and charging plan, and acquires the target oven number of the coke oven vehicle. In the implementation, the Siemens S7-1211C PLC controller (and other PLC controllers of other brands) is mainly used, which is a programmable controller in a low-medium performance range, and communicates with the coke oven production system through the Profinet communication protocol or the Siemens S7 protocol.

[0027] The on-board control unit is installed in the power distribution room of the coke oven vehicle to collect vehicle information and transmit it to the main control unit via wireless communication. In a preferred embodiment of this invention, the vehicle information collected by the on-board control unit includes vehicle interlock signals, real-time position signals, and oven door opening / closing signals. In practice, the on-board control unit primarily uses a Siemens S7-1211C PLC controller (and other Siemens brands of PLC controllers), a programmable controller for low-to-mid-range performance. It communicates with the coke oven vehicle PLC controller via the Profinet communication protocol or the Siemens S7 protocol, transmitting the collected signals wirelessly to the main control unit. The main control unit uses the received vehicle information to determine the coke oven production status and directs the vision recognition system to locate and move to the designated position.

[0028] The unblocking unit uses high-pressure water to flush away the sludge in the drainage branch pipe of the water seal trough, thus clearing the blockage.

[0029] In a preferred embodiment of the invention, the unblocking unit includes a high-pressure water pump, a main unblocking pipe 10, a branch unblocking pipe 8, and a branch valve 9. The high-pressure water pump is installed in the water pipe of the water seal trough 1, and the main unblocking pipe 10 is laid along the main drainage pipe 2 of the water seal trough. The branch unblocking pipe 8 is installed at the drainage branch pipe 6 of the water seal trough, and the branch valve 9 is installed between the branch unblocking pipe 8 and the main unblocking pipe 10. The branch valve 9 is individually controlled by opening and closing. The branch unblocking pipe is installed from bottom to top through the drainage branch pipe to a distance of 30cm from the drainage branch valve. When the drainage branch pipe is blocked, the high-pressure water flow from the branch unblocking pipe 8 acts on the drainage branch valve to flush the upper part of the drainage branch pipe. The high-pressure water jet dilutes the sludge and removes the blockage, thus achieving the purpose of unblocking.

[0030] Example like Figure 1 As shown, this embodiment is a control method implemented based on the coke oven water seal tank drainage control system of the present invention.

[0031] After each system unit completes its power-on self-test, and under the condition that the communication status of each unit is good and the data transmission is normal, the water seal tank drainage control system operates. The production acquisition system unit acquires the target furnace number of the coke oven. The coke pusher / coke quencher moves to the target furnace number. Driven by the servo drive system 3, the machine vision recognition system moves to the drainage branch pipe of the target furnace number area and completes positioning, edge detection and grayscale judgment of the observation hole 11. When the coke oven has completed production of the target furnace number, the coke oven door is closed, and the coke pusher / coke quencher moves away from the target furnace number to the next target furnace number, the main control unit controls the drainage branch pipe valve at this location to open. The vision recognition system determines whether water is flowing out of the branch pipe through the image in the observation hole 11. When the judgment result of the visual recognition system is no water, the main control unit receives the information of no water of the drainage branch pipe, controls the high-pressure water pump to open, and opens the branch valve 9, uses the high-pressure water column to flush the blocked drainage branch pipe, and then closes the high-pressure water pump and the branch valve 9.

[0032] When the judgment result of the visual recognition system is water, the machine visual recognition system continues to judge the turbidity degree of the water flow, continues to discharge water when the turbidity degree is turbid, sends the clear water flow information to the main control unit when the turbidity degree is clear, the main control unit closes the drainage branch valve at this place, the drainage at this place is completed, the main control unit receives the target furnace number and instructs the machine visual recognition system to run to the next target furnace number, and waits for the next drainage.

[0033] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A drainage control system for a coke oven water seal trough, applied to the water seal trough, characterized in that, include: The system comprises a main control unit, a machine vision unit, a production data acquisition unit, an onboard control unit, and a congestion clearing unit, among which: The machine vision unit is used to identify and determine whether the drainage branch pipe is blocked and the turbidity of the water discharged from the drainage branch pipe, and sends the judgment result and turbidity status to the main control unit. The main control unit is installed below the water seal tank or in the power distribution room to receive signals from the machine vision unit and control the unblocking unit based on the judgment result and the turbidity state. The production acquisition unit is located in the central control room and is used to acquire coke oven output and coal charging plans, as well as the target oven number of the coke oven vehicle. The vehicle control unit is installed in the power distribution room of the coke oven vehicle and is used to collect vehicle information and transmit the collected vehicle information to the main control unit via wireless communication. The unblocking unit uses high-pressure water to flush the sludge from the drainage branch pipe of the water seal trough, thereby clearing the blockage.

2. The coke oven water seal tank drainage control system according to claim 1, characterized in that, The machine vision unit includes an intelligent camera, a data processing system, a moving track, a servo drive system, and a wireless bridge system. The moving track is laid along the water seal trough and is arranged parallel to the main drainage pipe of the water seal trough. The servo drive system and the intelligent camera are installed on the moving track. The servo drive system is used to control the movement of the intelligent camera on the moving track. The data processing system is used to determine whether the drainage branch pipe is blocked and the turbidity of the water discharged from the drainage branch pipe based on the image information collected by the intelligent camera, and uses the wireless bridge system to send the judgment result and turbidity status to the main control unit.

3. The coke oven water seal tank drainage control system according to claim 1, characterized in that, The main control unit uses a PLC controller to realize a distributed structure and user-friendly HMI interface operation, and communicates with other units through industrial communication protocols.

4. The coke oven water seal tank drainage control system according to claim 1, characterized in that, The production acquisition unit communicates with the coke oven production system through an industrial communication protocol to acquire coke oven output and coal charging plans, as well as the target oven number of the coke oven vehicles.

5. The coke oven water seal tank drainage control system according to claim 1, characterized in that, The vehicle information collected by the vehicle control unit includes vehicle interlock signals, real-time location signals, and furnace door opening / closing signals.

6. The coke oven water seal tank drainage control system according to claim 1, characterized in that, The unblocking unit includes a high-pressure water pump, a main unblocking pipe, a branch unblocking pipe, and a branch valve. The high-pressure water pump is installed in the waterway of the water seal trough, and the main unblocking pipe is laid along the main drainage pipe of the water seal trough. The branch unblocking pipe is installed at the drainage branch pipe of the water seal trough, and a branch valve is installed between the branch unblocking pipe and the main unblocking pipe. The branch valve is controlled independently by opening and closing. When the drainage branch pipe is blocked, the high-pressure water flow from the unblocking branch pipe acts on the drainage branch pipe valve to flush the upper part of the drainage branch pipe. The high-pressure water jet dilutes the sludge and removes the blockage, thus achieving the purpose of unblocking.

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