Single carbonization chamber pressure and gas collecting pipe pressure intelligent control system

Abstract

The application discloses a single carbonization chamber pressure and gas collecting pipe pressure intelligent control system, which comprises a data layer and an application layer.The system controls the whole gas collecting process pressure as a whole, effectively overcomes the coupling influence between the gas collecting pipe pressure and the carbonization chamber pressure, avoids the coupling between the gas collecting pipe pressure and the carbonization chamber pressure from causing pressure instability, and further avoids the coke oven smoke and fire and the coke oven body string leakage caused by pressure fluctuation; the system is communicated with a four-vehicle interlocking system, a coke oven intelligent heating system and an ascending pipe automatic ignition system to realize data interaction, associates the coke oven production operation related systems together, overcomes the data barriers between the systems, can make correct judgment and treatment in time according to the actual operation condition of the process, and further improves the safety and stability of the coke oven production; the system realizes single carbonization chamber pressure intelligent and gas collecting pipe pressure intelligent control coordination control, improves the control effect, avoids the repeated investment of users, and greatly reduces the operation cost.

Description

Technical Field

[0001] This invention relates to the field of coking technology, specifically to an intelligent control system for single carbonization chamber pressure and gas collecting pipe pressure. Background Technology

[0002] The pressure in the coking chamber of a coke oven is one of the most important process control parameters in the coking process. Low pressure allows air to enter the coking chamber, causing coke combustion, reducing coke quality, and in severe cases, damaging the oven body and directly affecting the coke oven's lifespan. Excessive pressure leads to the leakage of large amounts of harmful raw coal gas, causing serious pollution to the surrounding environment and reducing the raw coal gas recovery rate. If the oven body is not properly sealed, raw coal gas leaks into the combustion chamber, allowing large amounts of sulfur and nitrogen-containing components to enter, resulting in excessive NOx and SO2 content in the coke oven flue gas, and potentially damaging the coke oven equipment due to combustion. Currently, the industry mainly uses two methods for controlling the pressure in the coke oven's carbonization chamber: main gas collection pipe pressure control and single carbonization chamber pressure control.

[0003] The control of the main gas collecting pipe pressure is problematic because the output of raw coal gas in a single carbonization chamber varies greatly throughout the coking process, resulting in significant pressure fluctuations. In the early stages of coking, the output and pressure of raw coal gas in the carbonization chamber are high, while in the later stages, after the coal seam forms semi-coke, the pressure drops rapidly. Therefore, the pressure at the bottom of each carbonization chamber is uneven under the control of the main gas collecting pipe, making it impossible to ensure that each chamber is under a slightly positive pressure. Furthermore, because the main gas collecting pipe control is positive pressure control, pressure fluctuations during coal charging often lead to smoke and fire leaks, especially noticeable in side furnaces. On the other hand, the control of the main gas collecting pipe pressure is a prerequisite for stable pressure in a single carbonization chamber. Therefore, intelligent control of the gas collecting pipe pressure and intelligent control of the pressure in a single coke oven carbonization chamber are complementary. Current control systems struggle to achieve intelligent and stable control of both the gas collecting pipe pressure and the carbonization chamber pressure.

[0004] To address these issues, we propose an intelligent control system for the pressure of a single carbonization chamber and the pressure of the gas collecting pipe. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent control system for the pressure of a single carbonization chamber and the pressure of the gas collecting pipe, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an intelligent control system for single carbonization chamber pressure and gas collecting pipe pressure, comprising a data layer and an application layer, wherein the data layer includes external system data and internal system data, and the application layer includes a single carbonization chamber pressure control subsystem and a gas collecting pipe pressure control subsystem.

[0007] The external data of the system includes data acquired from the four-car interlock, data acquired from the coke oven heating system, and data interface for the automatic ignition of the riser pipe. The internal data of the system includes signals from the pressure transmitter, limit switches of the drive cylinder, rotary switches, high and low pressure ammonia water switching, positioner signals, solenoid valve signals, gas collecting pipe valve signals, and blower speed signals.

[0008] Preferably, the data acquired by the four-vehicle interlock includes coal charging and coking plan, coal charging signal and progress, and coking signal; the data acquired by the coke oven heating system includes coking cycle data, heating regime data, coal weight data, coal blending ratio data, and coal attribute data.

[0009] Preferably, the coal charging and coking plan, coal charging signal and process, and coking signal are obtained by the four-car interlock via communication. The coking cycle data, heating regime data, coal weight data, coal blending ratio data, and coal attribute data are obtained by the coke oven heating system via communication. The communication methods include, but are not limited to, Ethernet communication and DP communication.

[0010] Preferably, the pressure transmitter signal, drive cylinder limit switch signal, knob switch signal, high and low pressure ammonia water switching signal, positioner signal, solenoid valve signal, air collection pipe valve signal, and blower speed signal are obtained by hard-wired cables.

[0011] Preferably, the single carbonization chamber pressure control subsystem includes a single carbonization chamber pressure regulation module, an automatic opening and closing module for the riser pipe, an automatic opening and closing module for the inner flap, and an automatic switching module for high and low pressure ammonia water. The gas collecting pipe pressure control subsystem includes a high-pressure ammonia water pressure control module and a gas collecting pipe pressure control module.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] This invention system controls the pressure of the entire gas collection process as a whole, effectively overcoming the coupling effect between the gas collection pipe pressure and the carbonization chamber pressure. It avoids pressure instability caused by this coupling, which can lead to phenomena such as coke oven smoke and fire, and furnace leakage due to pressure fluctuations. The system communicates with the four-car interlocking system, the coke oven intelligent heating system, and the riser pipe automatic ignition system for data exchange, linking coke oven production operation-related systems together. This overcomes data barriers between systems, enabling timely and accurate judgment and handling of actual process operation, further improving the safety and stability of coke oven production. Furthermore, the system achieves coordinated intelligent control of single carbonization chamber pressure and gas collection pipe pressure, improving control effectiveness while unified planning and construction greatly avoids redundant investment by users and significantly reduces operating costs. Attached Figure Description

[0014] Figure 1This is a system diagram of the present invention;

[0015] Figure 2 This is a diagram of the external data system in this invention;

[0016] Figure 3 This is a diagram of the internal data system of the system in this invention;

[0017] Figure 4 This is a system diagram of the single carbonization chamber pressure control subsystem in this invention;

[0018] Figure 5 This is a system diagram of the gas collection pipe pressure control subsystem in this invention;

[0019] Figure 6 This is the system control logic diagram in this invention. Detailed Implementation

[0020] 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. 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.

[0021] Example 1:

[0022] Please see Figure 1-5 The present invention provides a technical solution: an intelligent control system for single carbonization chamber pressure and gas collecting pipe pressure, including a data layer and an application layer. The data layer includes external system data and internal system data, and the application layer includes a single carbonization chamber pressure control subsystem and a gas collecting pipe pressure control subsystem.

[0023] External system data includes data acquired from the four-car interlock system, data acquired from the coke oven heating system, and the data interface for the automatic ignition of the riser pipe. Internal system data includes signals from pressure transmitters, limit switches of drive cylinders, rotary switches, high and low pressure ammonia water switching signals, positioners, solenoid valves, gas collecting pipe valves, and blower speed. The automatic ignition data interface is reserved by the system through communication methods (including but not limited to Ethernet communication, DP communication, etc.) to achieve coordinated control between the gas collecting process and the existing automatic ignition system of the riser pipe, avoiding the emission of blue smoke when the coke is fully cooked, black smoke when the coke is undercooked, and yellow smoke when the riser pipe is covered.

[0024] Example 2:

[0025] Please see Figure 1-5The data acquired by the four-car interlocking system includes coal charging and coking plans, coal charging signals and progress, and coking signals. The data acquired by the coke oven heating system includes coking cycle data, heating regime data, coal weight data, coal blending ratio data, and coal attribute data.

[0026] Please see Figure 1-5 The coal charging and coking plan, coal charging signals and progress, and coking signals are obtained by the four-car interlock via communication. Coking cycle data, heating regime data, coal weight data, coal blending ratio data, and coal attribute data are obtained by the coke oven heating system via communication, including but not limited to Ethernet communication and DP communication.

[0027] Please see Figure 1-5 The pressure transmitter signal, the drive cylinder limit switch signal, the rotary switch signal, the high and low pressure ammonia water switching signal, the positioner signal, the solenoid valve signal, the air collection pipe valve signal, and the blower speed signal are obtained through hard-wired cables.

[0028] Please see Figure 1-5The single carbonization chamber pressure control subsystem includes a single carbonization chamber pressure regulation module, an automatic riser pipe opening and closing module, an automatic inner flap opening and closing module, and a high-low pressure ammonia water automatic switching module. The gas collecting pipe pressure control subsystem includes a high-pressure ammonia water pressure control module and a gas collecting pipe pressure control module. The single carbonization chamber pressure regulation module, taking into account external system data such as coking coal charging plans, heating regimes, and coal input information, comprehensively considers the process status and coking status of each carbonization chamber. Based on different process stages and different coking processes, it automatically corrects the bridge pipe pressure setpoint and intelligently coordinates the opening and closing of the riser pipe inner flap water seal valve. The system ensures that the pressure in each carbonization chamber remains slightly positive, enabling real-time monitoring and curve querying of the current process status and relevant key process parameters for each carbonization chamber. It also enables automatic judgment of pressure anomalies in each carbonization chamber and the querying of relevant real-time alarms and alarm records. The automatic opening and closing module of the riser cover, based on the coal charging and coking process requirements in the data layer, the received coal and coking pushing operating conditions, and the status information of each piece of equipment, automatically opens and closes the riser cover during the coal charging and coking process, and ensures the safety interlocking of the riser cover, inner flap, and high and low pressure ammonia water equipment. The automatic switching module for high and low pressure ammonia water... Based on the coal charging and coking process requirements in the data layer, the received coal charging and coking condition information, and the status information of each piece of equipment, the system automatically switches between high and low pressure ammonia water during the coal charging process, and implements safety interlocking of the riser cover, inner flap, and high and low pressure ammonia water equipment. The high-pressure ammonia water pressure control module adjusts the high-pressure ammonia water pressure in real time based on the high and low pressure ammonia water switching signals during the coal charging process and the actual coal charging progress, achieving smokeless coal charging. It also enables centralized control of the high-pressure ammonia water pressure and switching between the operation control of the smoke guide car / coal charging car. The gas collecting pipe pressure control module adjusts the pressure according to the different coking conditions of the coke oven during coal charging. The system automatically corrects the pressure setpoint of the gas collecting pipe to ensure appropriate suction. Through feedforward control, intelligent feedback control, coordinated control, and online correction, it stabilizes the pressure of the gas collecting pipe during coal charging and coking. It enables visualized real-time monitoring and curve query of key process parameters related to the gas collecting pipe (including but not limited to the valve position of the gas collecting pipe regulating valve, the suction before the primary cooler, the position of the large circulation valve, the blower speed, and the current). It also enables automatic judgment of abnormal pressure in each section of the gas collecting pipe and query of relevant real-time alarms and alarm records. Furthermore, it allows for one-click switching between positive and negative pressure operation of the gas collecting pipe.

[0029] Example 3:

[0030] Please see Figure 6The intelligent logic in this invention is as follows: After obtaining relevant signals for coal charging and coke pushing, as well as heating system information from the four-car interlocking system and the coke oven heating intelligent control system, the system performs a condition judgment. If the current condition is determined to be coke pushing, the system enters the automatic opening and closing module of the riser pipe and the automatic opening and closing module of the inner flap and sends corresponding opening and closing signals to the riser pipe cover and the inner flap actuator. If the current condition is determined to be coal charging, the system enters the automatic opening and closing module of the riser pipe, the automatic opening and closing module of the inner flap, and the automatic switching module of high and low pressure ammonia water and sends corresponding opening and closing signals or switching signals to the riser pipe cover, the inner flap, and the high and low pressure ammonia water switching actuator. The high pressure ammonia water pressure control module is activated and sends corresponding control commands to the corresponding actuators. At the same time, the gas collecting pipe pressure control module will automatically adjust the gas collecting pipe pressure setpoint and calculate the control commands for the regulating valve and other related actuators according to the intelligent control algorithm. If the current condition is determined to be coking, the system enters the single carbonization chamber pressure regulation module and the gas collecting pipe pressure control module and calculates the control commands for the regulating valve and other related actuators according to the intelligent control algorithm.

[0031] Meanwhile, the automatic opening and closing module of the riser cover, the automatic opening and closing module of the inner flap, and the automatic switching module of high and low pressure ammonia water are interconnected with the control commands. The relevant control commands of the automatic opening and closing module of the riser cover are transmitted to the automatic ignition control system of the riser cover to ensure that the automatic ignition system of the riser cover issues ignition commands in a timely manner.

[0032] Example 4:

[0033] This invention system controls the pressure of the entire gas collection process as a whole, effectively overcoming the coupling effect between the gas collection pipe pressure and the carbonization chamber pressure. It avoids pressure instability caused by this coupling, which can lead to phenomena such as coke oven smoke and fire, and furnace leakage due to pressure fluctuations. The system communicates with the four-car interlocking system, the coke oven intelligent heating system, and the riser pipe automatic ignition system for data exchange, linking coke oven production operation-related systems together. This overcomes data barriers between systems, enabling timely and accurate judgment and handling of actual process operation, further improving the safety and stability of coke oven production. Furthermore, the system achieves coordinated intelligent control of single carbonization chamber pressure and gas collection pipe pressure, improving control effectiveness while unified planning and construction greatly avoids redundant investment by users and significantly reduces operating costs.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smart control system for single carbonization chamber pressure and gas collecting pipe pressure, comprising a data layer and an application layer, characterized in that: The data layer includes external system data and internal system data, and the application layer includes a single carbonization chamber pressure control subsystem and a gas collecting pipe pressure control subsystem. The external data of the system includes data acquired from the four-vehicle interlock, data acquired from the coke oven heating system, and data interface for the automatic ignition of the riser pipe. The internal data of the system includes signals from the pressure transmitter, limit switches of the drive cylinder, rotary switches, high and low pressure ammonia water switching, positioner signals, solenoid valve signals, gas collecting pipe valve signals, and blower speed signals. The single carbonization chamber pressure control subsystem includes a single carbonization chamber pressure regulation module, an automatic opening and closing module for the riser pipe, an automatic opening and closing module for the inner flap, and an automatic switching module for high and low pressure ammonia water. The gas collecting pipe pressure control subsystem includes a high-pressure ammonia water pressure control module and a gas collecting pipe pressure control module.

2. The intelligent control system for single carbonization chamber pressure and gas collecting pipe pressure according to claim 1, characterized in that: The data acquired by the four-vehicle interlocking system includes coal charging and coking plans, coal charging signals and progress, and coking signals. The data acquired by the coke oven heating system includes coking cycle data, heating regime data, coal weight data, coal blending ratio data, and coal attribute data.

3. The intelligent control system for single carbonization chamber pressure and gas collecting pipe pressure according to claim 2, characterized in that: The coal charging and coking plan, coal charging signal and process, and coking signal are obtained by the four-car interlock via communication. The coking cycle data, heating regime data, coal weight data, coal blending ratio data, and coal attribute data are obtained by the coke oven heating system via communication, including Ethernet communication and DP communication.

4. The intelligent control system for single carbonization chamber pressure and gas collecting pipe pressure according to claim 1, characterized in that: The pressure transmitter signal, drive cylinder limit switch signal, knob switch signal, high and low pressure ammonia water switching signal, positioner signal, solenoid valve signal, air collection pipe valve signal, and blower speed signal are obtained through hard-wired cables.

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