An emergency protection system for coke oven gas collecting pipes and its usage method

Abstract

This invention discloses an emergency protection system for coke oven gas collecting pipes and its usage method, relating to the field of coke oven technology. The emergency protection system for coke oven gas collecting pipes includes a circulating ammonia water pump fault signal detection device, a circulating ammonia water flow detection device, a pressure detection device, a gas collecting pipe temperature detection device, and an emergency protection system for the gas collecting pipe. This emergency protection system and its usage method, by developing an emergency protection system for coke oven gas collecting pipes, enables remote automatic control of existing circulating ammonia water valves and industrial emergency water valves, achieving automatic interlocking switching between circulating ammonia water and emergency water in the event of a circulating ammonia water system fault, thereby ensuring the safe operation of the coke oven gas collecting pipe.

Description

Technical Field

[0001] This invention relates to the field of coke oven technology, specifically to an emergency protection system for coke oven gas collecting pipes and its usage method. Background Technology

[0002] The coke oven raw gas extraction system mainly consists of components such as riser pipes, bridge pipes, gas collecting pipes, suction pipes, and high and low pressure ammonia water spray pipes. Its purpose is to smoothly extract the raw gas generated during the coking process in the coke oven. Its main functions include: 1) maintaining appropriate and stable pressure in the gas collecting pipes to prevent excessive pressure from causing smoke and fire during production, and maintaining positive pressure in each carbonization chamber during the coking process; 2) continuously spraying circulating ammonia water to cool the raw gas extracted from the carbonization chambers (temperature 650-800℃) to maintain the gas collecting pipe at a suitable temperature (80-100℃), preventing deformation of the gas collecting pipe, deterioration of production operating conditions, and increased load on the gas purification system due to excessive temperature, while maintaining good fluidity of tar and ammonia water to ensure smooth discharge.

[0003] As the steel industry continues to advance towards high-end, intelligent, green, and efficient production and manufacturing, steel companies are vigorously promoting staff reduction and efficiency improvement. The number of employees in each position is decreasing, and the degree of concentration and automation in production operations is increasing. Therefore, it is becoming increasingly important and urgent to effectively establish and use interlocking protection systems to deal with various production emergencies and ensure safe production. Relying on traditional manual on-site emergency response operations is clearly no longer in line with the inherent requirements of development.

[0004] Currently, in the coking industry, during normal coke oven production, if the circulating ammonia water supply is suddenly interrupted and cannot be restored in a short time, the only way to protect the gas collecting pipe and prevent overheating is to manually close the circulating ammonia water valve on-site and then open the emergency water valves one by one to supplement the emergency water spray for cooling the raw coal gas. This prevents the gas collecting pipe from overheating due to the raw coal gas not being cooled, which could lead to equipment deformation and damage. In actual emergency operation, because the circulating ammonia water valve and the emergency water valve are located in different areas and parts of the furnace top pipe gallery, and the operators are located in a centralized control room, which is far from the site (sometimes requiring climbing the pipe gallery), personnel must arrive on-site and coordinate to manually operate the valves. There is a risk that improper or untimely operation may cause damage to the gas collecting pipe welds due to thermal expansion and contraction. In addition, the reduction in the number of operators makes it difficult to guarantee the response speed and safety of emergency response.

[0005] In the prior art, there is patent 1) "A Method for Replacing Circulating Ammonia Water Valves in a Circulating Ammonia Water Pipeline and a Coke Oven Without Stopping Production" (Authorization Announcement No.: CN107629807B). This invention relates to a method for replacing circulating ammonia water valves in a circulating ammonia water pipeline and a coke oven without stopping production, including valves AD; the other end of valve 10 is connected to the other end of valve 8, the other end of valve 16, one end of valve D, and one end of valve A, leading to the circulating ammonia water pipeline to furnaces 1 and 2; the other end of valve 9 is connected to one end of valve 16, one end of valve 11, one end of valve C, and one end of valve B, leading to the circulating ammonia water pipeline to furnaces 3 and 4; the other end of valve 13 is connected to the other end of valves A and B; the other end of valve D is connected to the other end of valve C and is connected to the inlet pipeline of the high-pressure ammonia water pump to ensure a stable supply of high-pressure ammonia water, and the valve replacement is achieved through pump reversal operation. The advantages are: Modifying existing pipelines, adding valves and corresponding pipes facilitates valve replacement and avoids coke production shutdowns due to ammonia valve replacement. It solves the problem of two coke ovens having to shut down due to a lack of ammonia supply. However, this patent does not cover the interlocking automatic emergency protection operation of the coke oven gas collecting pipe in abnormal production conditions where the circulating ammonia supply to the coke oven is interrupted.

[0006] In the prior art, there is patent 2) a method for stable operation control of a high-pressure ammonia water system in a coke oven (publication number: CN115785976A). This invention relates to a method for stable operation control of a high-pressure ammonia water system in a coke oven, and it relates to the field of coke oven production technology. When the coke oven production load is low, the valves on several high-pressure ammonia water branch pipelines used for pipeline flushing are opened, so that the high-pressure ammonia water still maintains a flow rate of 5-40 m3 / h even when no coal is being loaded; the set pressure of the high-pressure ammonia water pump in standby mode is reduced to 0.8-1.8 MPa, so that the frequency of the inverter of the high-pressure ammonia water pump motor is reduced, thereby reducing the impeller speed and reducing the heat generated by the friction between the ammonia water and the impeller. The beneficial effects of this invention are: this method for stable operation control of a high-pressure ammonia water system in a coke oven is simple to operate and has significant effects. Without increasing investment costs or adding equipment, it only changes the production operation control method to achieve the purpose of stabilizing the system operating pressure, preventing drastic fluctuations in high-pressure ammonia water pressure from affecting production, and avoiding safety accidents caused by equipment damage. The patent does not cover the interlocking automatic emergency protection operation of the coke oven gas collecting pipe in the abnormal production state of coke oven circulating ammonia water stoppage. Summary of the Invention

[0007] (a) Technical problems to be solved

[0008] To address the shortcomings of existing technologies, this invention provides an emergency protection system for coke oven gas collecting pipes and its usage method, thus solving the problems existing in the prior art.

[0009] (II) Technical Solution

[0010] To achieve the above objectives, the present invention provides the following technical solution: an emergency protection system for a coke oven gas collecting pipe, comprising a circulating ammonia pump fault signal detection device, a circulating ammonia flow detection device, a pressure detection device, a gas collecting pipe temperature detection device, and a gas collecting pipe emergency protection system. The output terminals of the circulating ammonia pump fault signal detection device, the circulating ammonia flow detection device, the pressure detection device, and the gas collecting pipe temperature detection device are all electrically connected to the input terminal of the gas collecting pipe emergency protection system. The gas collecting pipe emergency protection system is bidirectionally electrically connected to an electric regulating valve for the circulating ammonia pipeline and an electric regulating valve for the emergency water pipeline.

[0011] A method for using an emergency protection system for a coke oven gas collecting pipe, comprising the aforementioned emergency protection system for a coke oven gas collecting pipe, wherein the specific operation is as follows:

[0012] Install remotely controllable electric regulating valves on the coke oven circulating ammonia water pipeline and emergency water pipeline, or modify the valves of the coke oven circulating ammonia water pipeline and emergency water pipeline to install automatic regulating mechanisms to achieve remote control, and connect the control signals to the coke oven gas collecting pipe emergency protection system;

[0013] Establish an emergency protection system for coke oven gas collecting pipes, including:

[0014] 1) Obtain fault signal data of circulating ammonia water pump from the gas purification unit as an interlock trigger signal for the shutdown of circulating ammonia water supply in the coke oven gas collecting pipe;

[0015] 2) Obtain data on the flow rate, pressure, and temperature of the circulating ammonia water in the coke oven gas collecting pipe from the coke oven DCS control system, and use this data for remote automatic adjustment and control of the opening of the circulating ammonia water valve and the emergency water valve.

[0016] 3) After the interlock for the shutdown of circulating ammonia water supply is triggered, the system will pop up an alarm window, requiring manual confirmation to start the system.

[0017] 4) Remote control and adjustment of the circulating ammonia water valve and the emergency water valve after the circulating ammonia water supply is stopped;

[0018] 5) Remote control and adjustment of the circulating ammonia water valve and the emergency water valve after the circulating ammonia water is restored;

[0019] The workflow and control requirements of the gas collection pipe emergency protection system are as follows:

[0020] 1) After the system receives a fault signal from the circulating ammonia pump, it triggers the interlock control program to respond, and after manual confirmation, it starts the gas collection pipe emergency protection system;

[0021] 2) After the system remotely and quickly closes the control valves of each circulating ammonia water pipe, the system remotely and gradually and slowly opens the control valves of the emergency water pipes at both ends of each section of the gas collecting pipe in each coke oven.

[0022] 3) The system controls the flow rate and pressure of emergency water by adjusting the opening of the emergency water valve to ensure that the temperature of the gas collection pipe is controlled below 220℃;

[0023] 4) After the system receives the fault clearance signal of the circulating ammonia water pump, after manual confirmation, it will quickly and automatically close all emergency water control valves remotely, and then gradually and slowly open all circulating ammonia water pipe control valves.

[0024] 5) The system interlock is released, and the flow rate, pressure, and gas collecting pipe temperature of the coke oven circulating ammonia water gradually return to normal control values.

[0025] (III) Beneficial Effects

[0026] This invention provides an emergency protection system for coke oven gas collecting pipes and its usage method. It has the following beneficial effects:

[0027] This emergency protection system for coke oven gas collecting pipes and its usage method, through the development of an emergency protection system for coke oven gas collecting pipes, enables remote automatic control of existing circulating ammonia water valves and industrial emergency water valves. It achieves automatic interlocking switching between circulating ammonia water and emergency water in the event of a circulating ammonia water system failure, ensuring the safe operation of the coke oven gas collecting pipes. In the event that the coke oven stops circulating ammonia water and cannot be restored in a short time, the system's interlocking remote control replaces the manual on-site operation of closing the circulating ammonia water valves and opening the emergency water valves, improving the emergency response speed under abnormal coke oven production conditions, ensuring the safety of on-site personnel, and preventing equipment damage. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the gas collection pipe emergency protection system of the present invention;

[0029] Figure 2 This is a flowchart illustrating the working process of the gas collection pipe emergency protection system of the present invention. Detailed Implementation

[0030] 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.

[0031] Please see Figure 1-2This invention provides a technical solution: an emergency protection system for a coke oven gas collecting pipe, comprising a circulating ammonia pump fault signal detection device, a circulating ammonia flow detection device, a pressure detection device, a gas collecting pipe temperature detection device, and a gas collecting pipe emergency protection system. The output terminals of the circulating ammonia pump fault signal detection device, the circulating ammonia flow detection device, the pressure detection device, and the gas collecting pipe temperature detection device are all electrically connected to the input terminal of the gas collecting pipe emergency protection system. The gas collecting pipe emergency protection system is bidirectionally electrically connected to an electric regulating valve for the circulating ammonia pipeline and an electric regulating valve for the emergency water pipeline.

[0032] A method for using an emergency protection system for a coke oven gas collecting pipe, comprising the aforementioned emergency protection system for a coke oven gas collecting pipe, wherein the specific operation is as follows:

[0033] Install remotely controllable electric regulating valves on the coke oven circulating ammonia water pipeline and emergency water pipeline, or modify the valves of the coke oven circulating ammonia water pipeline and emergency water pipeline to install automatic regulating mechanisms to achieve remote control, and connect the control signals to the coke oven gas collecting pipe emergency protection system;

[0034] Establish an emergency protection system for coke oven gas collecting pipes, including:

[0035] 1) Obtain fault signal data of circulating ammonia water pump from the gas purification unit as an interlock trigger signal for the shutdown of circulating ammonia water supply in the coke oven gas collecting pipe;

[0036] 2) Obtain data on the flow rate, pressure, and temperature of the circulating ammonia water in the coke oven gas collecting pipe from the coke oven DCS control system, and use this data for remote automatic adjustment and control of the opening of the circulating ammonia water valve and the emergency water valve.

[0037] 3) After the interlock for the shutdown of circulating ammonia water supply is triggered, the system will pop up an alarm window, requiring manual confirmation to start the system.

[0038] 4) Remote control and adjustment of the circulating ammonia water valve and the emergency water valve after the circulating ammonia water supply is stopped;

[0039] 5) Remote control and adjustment of the circulating ammonia water valve and the emergency water valve after the circulating ammonia water is restored;

[0040] The workflow and control requirements of the gas collection pipe emergency protection system are as follows:

[0041] 1) After the system receives a fault signal from the circulating ammonia pump, it triggers the interlock control program to respond, and after manual confirmation, it starts the gas collection pipe emergency protection system;

[0042] 2) After the system remotely and quickly closes the control valves of each circulating ammonia water pipe, the system remotely and gradually and slowly opens the control valves of the emergency water pipes at both ends of each section of the gas collecting pipe in each coke oven.

[0043] 3) The system controls the flow rate and pressure of emergency water by adjusting the opening of the emergency water valve to ensure that the temperature of the gas collection pipe is controlled below 220℃;

[0044] 4) After the system receives the fault clearance signal of the circulating ammonia water pump, after manual confirmation, it will quickly and automatically close all emergency water control valves remotely, and then gradually and slowly open all circulating ammonia water pipe control valves.

[0045] 5) The system interlock is released, and the flow rate, pressure, and gas collecting pipe temperature of the coke oven circulating ammonia water gradually return to normal control values.

[0046] Example:

[0047] Install remotely controllable electric regulating valves on the coke oven circulating ammonia water pipeline and emergency water pipeline, or install automatic regulating mechanisms on the valves of the coke oven circulating ammonia water pipeline and emergency water pipeline to achieve remote control, and connect the control signals to the coke oven gas collecting pipe emergency protection system.

[0048] Establishment of emergency protection system for coke oven gas collecting pipe

[0049] Develop and establish an emergency protection system for coke oven gas collecting pipes (hereinafter referred to as the "System"), the functions of which include:

[0050] 1) Obtain fault signal data of circulating ammonia water pump from the gas purification unit as an interlock trigger signal for the shutdown of circulating ammonia water supply in the coke oven gas collecting pipe;

[0051] 2) Obtain data on the flow rate, pressure, and temperature of the circulating ammonia water in the coke oven gas collecting pipe from the coke oven DCS control system, and use this data for remote automatic adjustment and control of the opening of the circulating ammonia water valve and the emergency water valve.

[0052] 3) After the interlock for the shutdown of circulating ammonia water supply is triggered, the system will pop up an alarm window, requiring manual confirmation to determine whether to start the system.

[0053] 4) Remote control and adjustment of the circulating ammonia water valve and the emergency water valve after the circulating ammonia water supply is stopped;

[0054] 5) Remote control and adjustment of the circulating ammonia water valve and the emergency water valve after the circulating ammonia water is restored;

[0055] 9.3 Workflow and Control Requirements of Gas Collection Pipe Emergency Protection System

[0056] 1) After the system receives a fault signal from the circulating ammonia pump, it triggers the interlock control program to respond, and after manual confirmation, it starts the gas collection pipe emergency protection system;

[0057] 2) After the system remotely and quickly closes the control valves of each circulating ammonia water pipe, the system remotely and gradually and slowly opens the control valves of the emergency water pipes at both ends of each section of the gas collecting pipe in each coke oven.

[0058] 3) The system controls the flow rate and pressure of emergency water by adjusting the opening of the emergency water valve to ensure that the temperature of the gas collection pipe is controlled below 220℃;

[0059] 4) After the system receives the fault clearance signal of the circulating ammonia water pump, after manual confirmation, it will quickly and automatically close all emergency water control valves remotely, and then gradually and slowly open all circulating ammonia water pipe control valves.

[0060] 5) The system interlock is released, and the flow rate, pressure, and gas collecting pipe temperature of the coke oven circulating ammonia water gradually return to normal control values.

[0061] It should be noted that this invention has been applied to coke ovens #1 and #2, #7 and #8, and #9 and #10 of a coal coking company. It enables remote automatic control of the circulating ammonia water valve and the industrial emergency water valve, ensuring the interlocked automatic switching control of circulating ammonia water and emergency water in the event of a fault in the circulating ammonia water system. It also ensures the safe operation of the coke oven gas collection pipe, improves the emergency response speed in abnormal production conditions of the coke oven, and protects the operational safety of employees.

[0062] In summary, this emergency protection system for coke oven gas collecting pipes and its usage method, through the development of an emergency protection system for coke oven gas collecting pipes, enables remote automatic control of existing circulating ammonia water valves and industrial emergency water valves. It achieves automatic interlocking switching between circulating ammonia water and emergency water in the event of a circulating ammonia water system failure, ensuring the safe operation of the coke oven gas collecting pipes. When the coke oven stops circulating ammonia water and cannot be restored in a short time, the system's interlocking remote control replaces the manual on-site operation of closing the circulating ammonia water valves and opening the emergency water valves, improving the emergency response speed under abnormal coke oven production conditions, ensuring the safety of on-site personnel, and preventing equipment damage.

[0063] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0064] 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 method of using an emergency protection system for a coke oven gas collecting pipe, characterized in that: The system includes an emergency protection system for the coke oven gas collecting pipe. This system comprises a circulating ammonia water pump fault signal detection device, a circulating ammonia water flow detection device, a pressure detection device, a gas collecting pipe temperature detection device, and a gas collecting pipe emergency protection system. The output terminals of the circulating ammonia water pump fault signal detection device, the circulating ammonia water flow detection device, the pressure detection device, and the gas collecting pipe temperature detection device are all electrically connected to the input terminal of the gas collecting pipe emergency protection system. The gas collecting pipe emergency protection system is bidirectionally electrically connected to an electric regulating valve for the circulating ammonia water pipeline and an electric regulating valve for the emergency water pipeline. The specific operating procedures for the emergency protection system used in coke oven gas collecting pipes are as follows: Install remotely controllable electric regulating valves on the coke oven circulating ammonia water pipeline and emergency water pipeline, or modify the valves of the coke oven circulating ammonia water pipeline and emergency water pipeline to install automatic regulating mechanisms to achieve remote control, and connect the control signals to the coke oven gas collecting pipe emergency protection system; Establish an emergency protection system for coke oven gas collecting pipes, including: 1) Obtain fault signal data of circulating ammonia water pump from the gas purification unit as an interlock trigger signal for the shutdown of circulating ammonia water supply in the coke oven gas collecting pipe; 2) Obtain data on the flow rate, pressure, and temperature of the circulating ammonia water in the coke oven gas collecting pipe from the coke oven DCS control system, and use this data for remote automatic adjustment and control of the opening of the circulating ammonia water valve and the emergency water valve. 3) After the interlock for the shutdown of circulating ammonia water supply is triggered, the system will pop up an alarm, requiring manual confirmation to start the system. 4) Remote control and adjustment of the circulating ammonia water valve and the emergency water valve after the circulating ammonia water supply is stopped; 5) Remote control and adjustment of the circulating ammonia water valve and the emergency water valve after the circulating ammonia water is restored; The workflow and control requirements of the gas collection pipe emergency protection system are as follows: 1) After the system receives a fault signal from the circulating ammonia pump, it triggers the interlock control program to respond, and after manual confirmation, it starts the gas collection pipe emergency protection system; 2) After the system remotely and quickly closes the control valves of each circulating ammonia water pipe, the system remotely and gradually and slowly opens the control valves of the emergency water pipes at both ends of each section of the gas collecting pipe in each coke oven. 3) The system controls the flow rate and pressure of emergency water by adjusting the opening of the emergency water valve to ensure that the temperature of the gas collection pipe is controlled below 220℃; 4) After the system receives the fault clearing signal of the circulating ammonia water pump, and after manual confirmation, it remotely and automatically closes all emergency water control valves and then gradually and slowly opens all circulating ammonia water pipe control valves. 5) The system interlock is released, and the flow rate, pressure, and gas collecting pipe temperature of the coke oven circulating ammonia water gradually return to normal control values.

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