WO2023134370A1 - 一种高炉喷吹煤气控制系统及控制方法 - Google Patents

一种高炉喷吹煤气控制系统及控制方法 Download PDF

Info

Publication number
WO2023134370A1
WO2023134370A1 PCT/CN2022/138699 CN2022138699W WO2023134370A1 WO 2023134370 A1 WO2023134370 A1 WO 2023134370A1 CN 2022138699 W CN2022138699 W CN 2022138699W WO 2023134370 A1 WO2023134370 A1 WO 2023134370A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipeline
gas
valve
pressure
nitrogen
Prior art date
Application number
PCT/CN2022/138699
Other languages
English (en)
French (fr)
Inventor
陈德荣
田宝山
蔡建新
刘磊
李涛
Original Assignee
新疆八一钢铁股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 新疆八一钢铁股份有限公司 filed Critical 新疆八一钢铁股份有限公司
Publication of WO2023134370A1 publication Critical patent/WO2023134370A1/zh

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/006—Automatically controlling the process
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/16—Tuyéres
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/24—Test rods or other checking devices
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents
    • C21B2005/005—Selection or treatment of the reducing gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the invention relates to blast furnace gas injection technology, in particular to a blast furnace gas injection control system and control method.
  • the present invention provides a blast furnace gas injection control system and control method.
  • a blast furnace gas injection control system comprising a coke oven gas pipeline, a decarburized gas pipeline, a protective nitrogen gas pipeline, and a main gas pipeline, the coke oven gas pipeline and the decarburized gas pipeline are connected to the main gas pipeline, and the main gas pipeline is distributed with a branch pipe ring
  • the protective nitrogen pipeline is connected to the main gas pipeline, and the various pipelines detect the running status of the pipeline through combined measuring points, and the control system automatically interlocks and regulates the valve group through the information conditions fed back by the detection points. Control the running status of the pipeline to ensure the safe and reliable operation of the gas injection system.
  • the coke oven gas is connected to the coke oven gas purification and pressurization system, and the gas is connected to the system through the compressor in the pressurization system to connect to the main gas pipeline, and the coke oven gas pipeline is connected to the main gas pipeline before A pressure control valve PV2101, a flow control valve FV2101 and a cut-off valve ZV2101 are sequentially installed on the pipeline.
  • a temperature measuring point TE-0001, a flow measuring point FT-0001, and a pressure measuring point PT-0001 are installed on the coke oven gas pipeline before the coke oven gas purification pressurization system, and the coke oven gas is adsorbed through an adsorption tower After removing tar, benzene, naphthalene and other sundries in the coke oven gas, it enters the coke oven gas compressor to compress and raise the pressure to above 0.7MPa.
  • a pressure measuring point PT-2102 is installed on the pipeline before the pressure control valve PV2101, and a temperature measuring point TE-2101 and a flow measuring point FT-2101 are installed on the pipeline between the pressure control valve PV2101 and the flow control valve FV2101. Measuring point PT-2101.
  • the decarbonized gas higher than 0.7MPa is connected to the system, and a pressure control valve PV2201, a flow control valve FV2201 and a shut-off valve ZV2201 are sequentially installed on the pipeline before being connected to the main gas pipeline.
  • a pressure measuring point PT-2202 is installed on the decarbonized gas pipeline before the pressure control valve PV2201, and a temperature measuring point TE-2201, a flow measuring point FT-2201 and a pressure measuring point are installed between the pressure control valve PV2201 and the flow control valve FV2201. Measuring point PT-2201.
  • the protective nitrogen pipeline includes a main nitrogen pipeline directly connected to the main gas pipeline, and another auxiliary nitrogen pipeline respectively connected to the pipelines on the pipelines in front of each nozzle.
  • the main nitrogen pipeline is installed with a flow control valve FV2301 and a cut-off valve 2301 in sequence before being connected to the system, and the other auxiliary nitrogen pipeline is provided with a cut-off valve 3001 to control the on-off of the pipeline before being connected to the system.
  • An on-off valve is arranged on the branch pipeline of the pipeline before connecting to the nozzle to control the on-off of the branch pipeline.
  • the temperature measuring point TE-0002, the flow measuring point FT-0002 and the pressure measuring point PT-0002 are installed on the nitrogen main line, and the temperature measuring point TE-2301, the flow measuring point FT-2301 and the flow control valve FV2301 are installed before the flow control valve FV2301.
  • Pressure measuring point PT-2301, pressure measuring point PT-0006 is installed behind the flow control valve FV2301 and in front of the main gas pipeline, and pressure measuring point PT-0005 is installed behind the cut-off valve 3001 on the auxiliary nitrogen pipeline.
  • flow measuring points FT and pressure measuring points PT are installed on the main gas pipeline, and temperature measuring points, flow measuring points and pressure measuring points are installed on the branch pipes connecting the main gas pipeline to each nozzle.
  • a blast furnace gas injection control method the steps are as follows:
  • K2 The central control judges whether the received signal is a normal operation signal
  • K4 During the gas injection process, real-time monitoring of the operating status of each part of the control system, including the operating status of each valve, whether the operating data detected by each measuring point is within the required data range, and the blast furnace operating status;
  • step K3 is as follows:
  • Step 1 Start the injection program after the equipment is in normal condition
  • Step 2 The flow control valve FV2301 on the security nitrogen pipeline first gives a preset opening
  • Step 3 Open the shut-off valve ZV2301 on the security nitrogen pipeline
  • Step 4 The flow control valve FV2301 on the security nitrogen pipeline tracks the set flow rate and opens the preset opening;
  • Step 5 After 120 seconds, open the cut-off valve on the coke oven gas pipeline or the decarburization gas pipeline;
  • Step 6 The flow control valve on the coke oven gas pipeline or decarbonized gas pipeline tracks the set flow and opens to an appropriate opening;
  • Step 7 The pressure control valve on the coke oven gas pipeline or decarburization gas pipeline is opened, and the opening is greater than the opening of the set flow rate;
  • Step 8 Close the flow control valve FV2301 on the security nitrogen pipeline within 60s;
  • Step 9 Close the shut-off valve ZV2301 on the security nitrogen pipeline. Start coke oven gas injection in the furnace.
  • stop program flow in the step K5 is as follows:
  • the monitoring operation status of each place is normal, the gas injection program is running, and the gas is continuously injected into the furnace.
  • the monitoring status of each place is abnormal, and the central control is executed immediately. Stop the gas injection procedure, stop the gas supply, and fill in protective nitrogen to protect the blast furnace equipment.
  • blast furnace hot air pressure blast furnace cold air pressure
  • blast furnace outlet water pressure abnormality soft water outlet pressure abnormality
  • turbid oil pump outlet pressure abnormality pressure difference between gas casing pipe and hot blast pressure is not within the normal range, and the main nitrogen gas of the security nitrogen pipeline
  • the pipeline pressure is abnormal, the total flow rate of decarburized gas and coke oven gas is less than the preset value, etc., nitrogen will automatically replenish and enter the system to maintain the pressure and purge the system.
  • the invention designs a safe and efficient tuyere gas injection control method to cope with normal and abnormal operations after tuyere gas injection, and can realize the normal operation of the blast furnace tuyere gas injection system and realize tuyere injection coke oven
  • the gas system can safely exit operation under abnormal conditions to ensure system safety, realize the safe linkage of individual valves and valve groups of the tuyere injection gas system, and realize the long-term stable operation of the tuyere injection gas system, so as to achieve energy saving and emission reduction, and reduce carbon emissions Target.
  • Fig. 1 is a schematic diagram of the control system of the present invention
  • Fig. 2 is a flow chart of the coke oven gas start-up program of the present invention
  • Fig. 3 is the flow chart of coke oven gas injection stop program of the present invention
  • Fig. 4 is a flow chart of the start-up procedure for blowing decarbonized gas of the present invention
  • Fig. 5 is a flow chart of the program for stopping the injection of decarbonized gas according to the present invention.
  • a blast furnace gas injection system as shown in Figure 1 includes a coke oven gas pipeline, a decarburization gas pipeline and a protective nitrogen pipeline.
  • the coke oven gas pipeline and the decarburization gas pipeline are connected to the same main gas pipeline, and the main gas pipeline is distributed to the nozzle of the blast furnace gas injection port, and the gas is injected into the blast furnace through the nozzle.
  • the protective nitrogen gas pipeline has two pipelines, one of which is connected to the same main gas pipeline as the coke oven gas pipeline and the decarbonized gas pipeline, and the protective nitrogen gas enters the main gas pipeline together with the coke oven gas and decarbonized gas, and is controlled by the main gas pipeline.
  • the gas pipeline is distributed to the nozzle and sprayed into the blast furnace.
  • the protective nitrogen pipeline includes a main nitrogen pipeline directly connected to the main gas pipeline, and another auxiliary nitrogen pipeline directly connected to the pipeline in front of each nozzle through a valve to control this nitrogen pipeline.
  • the coke oven gas After the coke oven gas is connected to the system, it first enters the coke oven gas purification and pressurization system, and then the gas is connected to the system through the compressor in the pressurization system, and then connected to the main gas pipeline, and the coke oven gas pipeline is connected to the main gas pipeline.
  • Pressure control valve PV2101, flow control valve FV2101 and cut-off valve ZV2101 are installed on the pipeline before entering the main gas pipeline. After the cut-off valve, a release pipe is installed to purge the balance air pressure, and the discharge pipe is controlled by the stop valve.
  • a temperature measuring point TE-0001, a flow measuring point FT-0001 and a pressure measuring point PT-0001 are installed on the coke oven gas pipeline before the coke oven gas purification and pressurization system.
  • the decarbonized gas is connected to the system through a compressor, and then connected to the main gas pipeline, the pressure control valve PV2201, the flow control valve FV2201 and the shut-off valve ZV2201 are also arranged in sequence on the pipeline.
  • the pressure measuring point PT-2202 is installed on the decarburization gas pipeline before the pressure control valve PV2201, and the temperature measuring point TE-2201, the flow measuring point FT-2201 and the pressure measuring point PT are installed between the pressure control valve PV2201 and the flow control valve FV2201 -2201.
  • the main nitrogen pipeline of the security nitrogen pipeline is installed with a flow control valve FV2301 and a shut-off valve 2301 before connecting to the system.
  • a release pipe is installed behind the valve, and the on-off is controlled by the valve.
  • Another auxiliary nitrogen pipeline is connected to the system.
  • a shut-off valve 3001 is set to control the on-off of the pipeline, and an on-off valve is set on the branch pipeline of the pipeline before connecting to the nozzle to control the on-off of the branch pipeline.
  • the flow measuring point FT and the pressure measuring point PT are installed on the main gas pipeline to detect the running status in the main gas pipeline.
  • Each measuring point on the coke oven gas pipeline detects the corresponding data, and transmits the data signal to the central control;
  • the blast furnace hot air pressure is normal
  • the blast furnace cold air pressure is normal
  • the blast furnace tuyere water pressure and water volume are normal
  • the blast furnace soft water outlet pressure and water volume are normal
  • the blast furnace turbid ring water pressure and flow are normal, etc.
  • the blast furnace operating status is normal.
  • the compressor on the coke oven gas pipeline is running normally, the inlet and outlet pressure of the compressor are normal, the inlet pressure of the pressure control valve is normal, the pressure control valve and flow control are normal, the shut-off valve is normal, etc.
  • the coke oven gas pipeline is in normal operation.
  • the inlet pressure of the pressure control valve on the security nitrogen pipeline is normal, and the flow control valve and quick-opening valve are normal.
  • the coke oven gas injection can be started, and the central control will give a signal to start the coke oven gas injection.
  • blast furnace hot air pressure blast furnace cold air pressure
  • blast furnace tuyere water pressure and water volume blast furnace soft water outlet pressure and water volume
  • blast furnace turbid ring water pressure and flow etc. blast furnace operating status.
  • Coke oven gas pipeline compressor operation compressor inlet and outlet pressure, pressure control valve inlet pressure, pressure control valve and flow control, shut-off valve normal and other coke oven gas pipeline operation status.
  • the coke oven gas is normally supplied. If one of the above operating states is not within the normal range, when an abnormality occurs, run the coke oven gas stop program to stop the coke oven gas supply and fill the pipeline. Enter security nitrogen protection equipment to prevent accidents.
  • the blast furnace hot air pressure is abnormal
  • the blast furnace cold air pressure is abnormal
  • the blast furnace outlet water pressure is abnormal
  • the soft water outlet pressure is abnormal
  • the turbid oil pump outlet pressure is abnormal
  • the pressure difference between the gas casing pipe and the hot air pressure is not within the normal range
  • the main nitrogen pipeline pressure of the security nitrogen pipeline is abnormal.
  • Each measuring point on the decarbonized gas pipeline detects the corresponding data, and transmits the data signal to the central control;
  • the blast furnace hot air pressure is normal
  • the blast furnace cold air pressure is normal
  • the blast furnace tuyere water pressure and water volume are normal
  • the blast furnace soft water outlet pressure and water volume are normal
  • the blast furnace turbid ring water pressure and flow are normal, etc.
  • the blast furnace operating status is normal.
  • the compressor on the decarbonized gas pipeline is running normally, the inlet and outlet pressures of the compressor are normal, the inlet pressure of the pressure control valve is normal, the pressure control valve and flow control are normal, the shut-off valve is normal, etc.
  • the decarburization gas pipeline is normal and the Ouyeel furnace is normal.
  • the pressure difference between the pressure behind the decarburized gas regulating valve and the hot air pressure is within the normal range, and the pressure difference between the gas surrounding pipe pressure and the hot air pressure is within the normal range.
  • the inlet pressure of the pressure control valve on the security nitrogen pipeline is normal, and the flow control valve and quick-opening valve are normal.
  • the decarbonized gas injection can be started, and the central control will give the signal to start the decarbonized gas injection, and run the coke oven gas injection control system.
  • the specific steps are as follows:
  • Coke oven decarburization gas upper flow control valve FV2201 tracks the set flow to open the proper opening
  • Blast furnace fan operation blast furnace hot air pressure, blast furnace cold air pressure, blast furnace tuyere water pressure and water volume, blast furnace soft water outlet pressure and water volume, blast furnace turbid ring water pressure and flow, etc.
  • Compressor operation on the decarbonized gas pipeline compressor inlet and outlet pressure, pressure control valve inlet pressure, pressure control valve and flow control, cut-off valve and other decarbonized gas pipeline operating status and Ouyeel furnace operating status.
  • the decarbonized gas When all the above operating states are normal, the decarbonized gas will be supplied normally and continuously. When one of the above operating states is abnormal, the stop program will be started, the gas supply of decarbonized gas will be stopped, and the security nitrogen protection equipment will be supplemented.
  • the blast furnace hot air pressure is abnormal
  • the blast furnace cold air pressure is abnormal
  • the blast furnace outlet water pressure is abnormal
  • the soft water outlet pressure is abnormal
  • the turbid oil pump outlet pressure is abnormal
  • the pressure difference between the gas casing pipe and the hot air pressure is not within the normal range
  • the main nitrogen pipeline pressure of the security nitrogen pipeline is abnormal.
  • the invention designs a safe and efficient tuyere gas injection control method to cope with normal and abnormal operations after tuyere gas injection, and can realize the normal operation of the blast furnace tuyere gas injection system and realize tuyere injection coke oven
  • the gas system can safely exit operation under abnormal conditions to ensure system safety, realize the safe linkage of individual valves and valve groups of the tuyere injection gas system, and realize the long-term stable operation of the tuyere injection gas system, so as to achieve energy saving and emission reduction, and reduce carbon emissions Target.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Iron (AREA)
  • Blast Furnaces (AREA)

Abstract

一种高炉喷吹煤气控制系统及控制方法，包括焦炉煤气管线、脱碳煤气管线、保护氮气管线以及主煤气管线，焦炉煤气管线与脱碳煤气管线连通主煤气管线，主煤气管线分配支管至高炉喷气口的喷嘴处，保护氮气管线连通主煤气管线，各条管线通过组合测点检测管线运行状态，通过调控阀门组控制管线运行状态。该方法可实现风口喷吹焦炉煤气系统在异常情况下能安全退出运行。

Description

一种高炉喷吹煤气控制系统及控制方法 技术领域
本发明涉及高炉煤气喷吹技术，特别涉及一种高炉喷吹煤气控制系统及控制方法。
背景技术
由于钢铁工业CO 2排放量占总排放量的15％以上，钢铁企业将长期承受巨大的碳减排压力。现阶段炼铁煤气中CO 2量约占整个钢铁生产CO2总量的70％。所以，炼铁工序是钢铁生产降低CO 2排放的核心环节，传统高炉普遍采取了风口喷煤技术，通过风口喷吹煤气实现低碳环保的冶炼目标出已提到钢铁行业节能减排日程，但因煤气的易燃爆性、有毒性决定了风口喷吹煤气必须考虑和解决安全运行问题。
发明内容
为了解决上述问题，本发明提供一种高炉喷吹煤气控制系统及控制方法。
为解决上述问题，本发明通过以下方案实现：
一种高炉喷吹煤气控制系统，包括焦炉煤气管线、脱碳煤气管线、保护氮气管线以及主煤气管线，所述焦炉煤气管线与脱碳煤气管线连通主煤气管线，主煤气管线分配支管环布至高炉喷气口的喷嘴处，所述保护氮气管线连通主煤气管线，所述各条管线通过组合测点检测管线运行状态，控制系统通过检测点反馈的信息条件，自动联锁调控阀门组，控制管线运行状态，确保煤气喷吹系统安全可靠的运行。
进一步地，所述焦炉煤气连通焦炉煤气净化加压系统，通过加压 系统中压缩机将煤气接入本系统连通至主煤气管路，所述焦炉煤气管路接入主煤气管道前在管路上依次安装有压力控制阀PV2101，流量控制阀FV2101和切断阀ZV2101。
进一步地，所述焦炉煤气净化加压系统前的焦炉煤气管路上安装温度测点TE-0001，流量测点FT-0001，压力测点PT-0001，所述焦炉煤气经过吸附塔吸附除去焦炉煤气中的焦油、苯、萘等杂物后进入焦炉煤气压缩机压缩提压至0.7MPa以上。
进一步地，所述压力控制阀PV2101前的管路上安装压力测点PT-2102，压力控制阀PV2101和流量控制阀FV2101之间管路上安装温度测点TE-2101，流量测点FT-2101，压力测点PT-2101。
进一步地，所述高于0.7MPa的脱碳煤气接入本系统，在接入主煤气管路前的管路上依次设置有压力控制阀PV2201，流量控制阀FV2201和切断阀ZV2201。
进一步地，所述压力控制阀PV2201前脱碳煤气管路上安装压力测点PT-2202，压力控制阀PV2201和流量控制阀FV2201之间安装温度测点TE-2201、流量测点FT-2201和压力测点PT-2201。
进一步地，所述保护氮气管线包括一条氮气主管路直接连通至主煤气管线的管路，以及另一条辅助氮气管路分别接通至各个喷嘴前管线上的管路。
进一步地，所述氮气主管路在接入本系统前依次安装有流量控制阀FV2301和切断阀2301，另一条辅助氮气管路在接入本系统前设置有切断阀3001控制管路的通断，在接入喷嘴前管路的支管路上都设 置通断阀控制支管的通断。
进一步地，所述氮气主管路上安装温度测点TE-0002、流量测点FT-0002和压力测点PT-0002，流量控制阀FV2301前安装温度测点TE-2301、流量测点FT-2301和压力测点PT-2301，流量控制阀FV2301后与主煤气管道前安装压力测点PT-0006，辅助氮气管路上切断阀3001后安装压力测点PT-0005。
进一步地，主煤气管线上安装流量测点FT和压力测点PT，在主煤气管道接至各个喷嘴的支管上安装温度测点、流量测点和压力测点。
一种高炉煤气喷吹控制方法，步骤如下：
K1：开始喷吹煤气前，控制系统中各处测点信号、各个设备状态信号传输至中控；
K2：由中控判断接收到的信号是否为正常运行状态信号；
K3：全部为正常运行状态后，由中控给出喷吹信号，启动喷吹煤气控制程序；
K4：煤气喷吹过程中，实时监测控制系统中各处运行状态，包括各阀门的运行状态，各个测点检测的运行数据是否在要求数据范围内，高炉运行状态；
K5：停炉停止煤气喷吹时，由中控给出停止喷吹信号，运行煤气喷吹停止程序，停止向炉内喷吹煤气。
进一步地，所述步骤K3中启动程序流程如下：
步骤1：设备状态正常后启动喷吹程序；
步骤2：安保氮气管线上流量控制阀FV2301先给予一个预设开 度；
步骤3：打开安保氮气管线上切断阀ZV2301；
步骤4：安保氮气管线上流量控制阀FV2301跟踪设定流量打开预设开度；
步骤5：120秒后打开焦炉煤气管线或脱碳煤气管线上切断阀；
步骤6：焦炉煤气管线或脱碳煤气管线上流量控制阀跟踪设定流量打开合适开度；
步骤7：焦炉煤气管线或脱碳煤气管线上压力控制阀打开，开度大于设定流量的开度；
步骤8：60s内关闭安保氮气管线上流量控制阀FV2301；
步骤9：关闭安保氮气管线上切断阀ZV2301。开始焦炉煤气炉内喷吹。
进一步地，所述步骤K5中停止程序流程如下：
D1：将安保氮气管线上流量控制阀FV2301开度开至100％全开；
D2：打开安保氮气管线上切断阀ZV2301；
D3：焦炉煤气管线或脱碳煤气管线上流量控制阀全关；
D4：焦炉煤气管线或脱碳煤气管线上切断阀关闭；
D5：安保氮气管线上流量控制阀FV2301关至设定流量；
D6：确认安保氮气管线上切断阀ZV2301全开；
D7：打开辅助安保氮气管线上切断阀ZV3001；
D8；逐渐关闭安保氮气管线上流量控制阀FV2301；
D9：关闭喷嘴支管上切断阀；
D10：一段时间后，等到氮气将炉内煤气吹扫完成后，关闭辅助安保氮气与喷嘴管线连通的支管上的切断阀；
D11：关闭辅助安保氮气管线上的切断阀ZV3001。
进一步地，所述步骤K4控制系统运行过程中各处监测运行状态正常，煤气喷吹程序运行，持续向炉内喷吹煤气，运行过程中各处监测状态有一处运行状态异常，中控立即执行喷吹煤气停止程序，停止煤气供气，并充入保护氮气保护高炉设备。
进一步地，当出现脱碳煤气异常、焦炉煤气压缩机异常以及阀门误动作导致气压不足或停气情况下，氮气会自动补充进入系统，对系统进行保压和吹扫，确保送煤气系统不倒灌。
进一步地，当出现高炉热风压力异常、高炉冷风压力异常、高炉分口水压异常、软水出口压力异常、浊油泵出口压力异常、煤气围管压力与热风压力差不在正常范围内、安保氮气管线主氮气管路压力异常、脱碳煤气与焦炉煤气的总流量小于预设值等异常状态出现时，氮气自动补充进入系统，对系统进行保压和吹扫。
本发明设计一种安全高效的风口喷吹煤气的控制方法，以应对风口喷吹煤气后的正常及异常操作，可实现高炉风口喷吹煤气后的系统能正常投入运行，实现风口喷吹焦炉煤气系统在异常情况下能安全退出运行，确保系统安全，实现风口喷吹煤气系统单体阀门及阀组的安全联动，实现风口喷吹煤气系统长期稳定运行，以达到节能减排，降低碳排放目标。
附图说明
下面通过附图和具体实施案例对本发明进一步说明。
图1为本发明控制系统示意图
图2为本发明喷吹焦炉煤气启动程序流程图
图3为本发明喷吹焦炉煤气停止程序流程图
图4为本发明喷吹脱碳煤气启动程序流程图
图5为本发明喷吹脱碳煤气停止程序流程图。
具体实施方式
如图1所述的一种高炉喷吹煤气系统，包括一条焦炉煤气管线，一条脱碳煤气管线以及一条保护氮气管线。
所述焦炉煤气管线与脱碳煤气管线接入同一条主煤气管线，由主煤气管线分配至高炉喷气口的喷嘴处，由喷嘴将煤气喷入高炉内。
所述保护氮气管线有两路管路，一条管路与焦炉煤气管线和脱碳煤气管线接入同一个主煤气管线，保护氮气跟随焦炉煤气和脱碳煤气一起进入主煤气管道，由主煤气管道分配至喷嘴处喷入高炉内。
所述保护氮气管线包括一条直接连通至主煤气管线的主氮气管路，以及另一条直接接通在各个喷嘴前管路上通过阀门控制这条氮气管路的辅助氮气管路。
所述焦炉煤气接入本系统后先进入焦炉煤气净化加压系统，而后通过加压系统中压缩机将煤气接入本系统，后接入主煤气管路，所述焦炉煤气管道接入主煤气管道前在管路上以此安装有压力控制阀PV2101，流量控制阀FV2101和切断阀ZV2101，截止阀后设置有放散管吹扫平衡气压，放散管由截止阀控制通断。
所述焦炉煤气净化加压系统前的焦炉煤气管路上安装温度测点TE-0001，流量测点FT-0001，压力测点PT-0001。
所述压力控制阀PV2101前的管路上安装压力测点PT-2102，压力控制阀PV2101和流量控制阀FV2101之间管路上安装温度测点TE-2101，流量测点FT-2101，压力测点PT-2101。
所述脱碳煤气经由压缩机接入本系统，然后接入主煤气管路前管路上依次也设置压力控制阀PV2201，流量控制阀FV2201和切断阀ZV2201。
所述压力控制阀PV2201前脱碳煤气管路上安装压力测点PT-2202，压力控制阀PV2201和流量控制阀FV2201之间安装温度测点TE-2201、流量测点FT-2201和压力测点PT-2201。
所述安保氮气管路的中主氮气管路在接入本系统前依次安装有流量控制阀FV2301和切断阀2301，阀后设置放散管，由阀门控制通断，另一条辅助氮气管路在接入本系统前设置有截止阀3001控制管路的通断，在接入喷嘴前管路的支管路上都设置通断阀控制支管的通断。
所述安保氮气管线的氮气主管路上安装温度测点TE-0002、流量测点FT-0002和压力测点PT-0002，流量控制阀FV2301前安装温度测点TE-2301、流量测点FT-2301和压力测点PT-2301，流量控制阀FV2301后与主煤气管道前安装压力测点PT-0006，接入喷嘴前管线的管路上切断阀3001后安装压力测点PT-0005。
焦炉煤气管线与脱碳煤气管线接入主煤气管线后在主煤气管线 上安装安装流量测点FT和压力测点PT，检测主煤气管道内运行状态。
在主煤气管道接至各个喷嘴的支管上安装安装温度测点、流量测点和压力测点，检测各个支管的运行状态。
一种高炉煤气喷吹系统控制方法，如图2至图5所示的步骤，具体步骤如下：
一、焦炉煤气喷吹
启动：
焦炉煤气管路上各个测点检测相应的数据，并将数据信号传输至中控；
当高炉风机运行正常，高炉热风压力正常，高炉冷风压力正常，高炉风口水压和水量正常，高炉软水出口压力和水量正常高炉浊环水水压和流量正常等高炉运行状态都正常。
焦炉煤气管线上压缩机运行正常，压缩机入口和出口压力正常，压力控制阀入口压力正常，压力控制阀和流量控制正常，切断阀正常等焦炉煤气管线运行正常。
安保氮气管线上压力控制阀入口压力正常，流量控制阀和快开阀正常。
以上三处均正常后可以启动喷吹焦炉煤气，由中控给出开启喷吹焦炉煤气信号，
运行喷吹焦炉煤气控制系统，具体步骤如下：
S1：安保氮气管线上流量控制阀FV2301先给予一个预设开度；
S2：打开安保氮气管线上切断阀ZV2301；
S3：安保氮气管线上流量控制阀FV2301跟踪设定流量打开预设开度；
S4：打开焦炉煤气管线上切断阀ZV2101；
S5：焦炉煤气管线上流量控制阀FV2101跟踪设定流量打开合适开度；
S6：焦炉煤气管线上压力控制阀PV2101打开，开度大于设定流量的开度；
S7：60s内关闭安保氮气管线上流量控制阀FV2301；
S8：关闭安保氮气管线上切断阀ZV2301。
停止：
当工作完成后停炉时，先停止送气，停止送气步骤如下：
D1：将安保氮气管线上流量控制阀FV2301开度开至100％全开；
D2：打开安保氮气管线上切断阀ZV2301；
D3：焦炉煤气管线上流量控制阀FV2101全关；
D4：焦炉煤气管线上切断阀ZV2101关闭；
D5：安保氮气管线上流量控制阀FV2301关至设定流量；
D6：确认安保氮气管线上切断阀ZV2301全开；
D7：打开辅助安保氮气管线上切断阀ZV3001；
D8；逐渐关闭安保氮气管线上流量控制阀FV2301；
D9：关闭喷嘴支管上切断阀；
D10：一段时间后，等到氮气将炉内煤气等活跃气体排尽后，关闭辅助安保氮气与喷嘴管线连通的支管上的切断阀；
D11：关闭辅助安保氮气管线上的切断阀ZV3001。
运行：
高炉热风压力，高炉冷风压力，高炉风口水压和水量，高炉软水出口压力和水量，高炉浊环水水压和流量等高炉运行状态。
焦炉煤气管线上压缩机运行，压缩机入口和出口压力，压力控制阀入口压力，压力控制阀和流量控制，切断阀正常等焦炉煤气管线运行状态。
以上运行状态都处于正常范围内时，焦炉煤气正常供气，以上运行状态有一处运行状态不在正常范围为出现异常时，运行焦炉煤气停止程序，停止焦炉煤气供气，往管线内充入安保氮气保护设备防止出现意外事故。
当出现高炉热风压力异常、高炉冷风压力异常、高炉分口水压异常、软水出口压力异常、浊油泵出口压力异常、煤气围管压力与热风压力差不在正常范围内、安保氮气管线主氮气管路压力异常、脱碳煤气与焦炉煤气的总流量小于预设值等异常状态出现时，控制系统运行停止程序。
二、脱碳煤气喷吹
脱碳煤气管路上各个测点检测相应的数据，并将数据信号传输至中控；
当高炉风机运行正常，高炉热风压力正常，高炉冷风压力正常，高炉风口水压和水量正常，高炉软水出口压力和水量正常高炉浊环水水压和流量正常等高炉运行状态都正常。
脱碳煤气管线上压缩机运行正常，压缩机入口和出口压力正常，压力控制阀入口压力正常，压力控制阀和流量控制正常，切断阀正常等脱碳煤气管路运行正常以及欧冶炉运行正常。
脱碳煤气调节阀后压力与热风压力的压力差处于正常范围内，煤气围管压力与热风压力的压力差处于正常范围内。
安保氮气管线上压力控制阀入口压力正常，流量控制阀和快开阀正常。
以上均正常后可以启动喷吹脱碳煤气，由中控给出开启喷吹脱碳煤气信号，运行喷吹焦炉煤气控制系统，具体步骤如下：
C1：安保氮气管线上流量控制阀FV2301给予一个预设开度；
C2：打开安保氮气管线上切断阀ZV2301；
C3：安保氮气管线上流量控制阀FV2301跟踪设定流量打开预设开度；
C4：打开脱碳煤气管线上切断阀ZV2201；
C5：焦炉脱碳煤气上流量控制阀FV2201跟踪设定流量打开合适开度；
C6：焦炉脱碳煤气上压力控制阀PV2201打开，开度大于设定流量的开度；
C7：60s内关闭安保氮气管线上流量控制阀FV2301；
C8：关闭安保氮气管线上切断阀ZV2301。
停止脱碳煤气供气时，具体步骤如下：
D1：将安保氮气管线上流量控制阀FV2301开度开至100％全开；
D2：打开安保氮气管线上切断阀ZV2301；
D3：脱碳煤气管线上流量控制阀FV2201全关；
D4：脱碳煤气管线上切断阀ZV2201关闭；
D5：安保氮气管线上流量控制阀FV2301关至设定流量；
D6：确认安保氮气管线上切断阀ZV2301全开；
D7：打开辅助安保氮气管线上切断阀ZV3001；
D8；逐渐关闭安保氮气管线上流量控制阀FV2301；
D9：关闭喷嘴支管上切断阀；
D10：一段时间后，等到氮气将炉内煤气等活跃气体排尽后，关闭辅助安保氮气与喷嘴管线连通的支管上的切断阀；
D11：关闭辅助安保氮气管线上的切断阀ZV3001。
运行：
高炉风机运行，高炉热风压力，高炉冷风压力，高炉风口水压和水量，高炉软水出口压力和水量，高炉浊环水水压和流量等高炉运行状态。
脱碳煤气管线上压缩机运行，压缩机入口和出口压力，压力控制阀入口压力，压力控制阀和流量控制，切断阀等脱碳煤气管路运行状态以及欧冶炉运行状态。
脱碳煤气调节阀后压力与热风压力的压力差，煤气围管压力与热风压力的压力差。
安保氮气管线上压力控制阀入口压力，流量控制阀和快开阀等安保氮气线路运行状态。
以上运行状态全部正常时，脱碳煤气正常持续供气，当以上运行状态有一处出现异常时，启动停止程序，停止脱碳煤气的供气，补充安保氮气保护设备。
当出现高炉热风压力异常、高炉冷风压力异常、高炉分口水压异常、软水出口压力异常、浊油泵出口压力异常、煤气围管压力与热风压力差不在正常范围内、安保氮气管线主氮气管路压力异常、脱碳煤气与焦炉煤气的总流量小于预设值等异常状态出现时，控制系统运行停止程序。
本发明设计一种安全高效的风口喷吹煤气的控制方法，以应对风口喷吹煤气后的正常及异常操作，可实现高炉风口喷吹煤气后的系统能正常投入运行，实现风口喷吹焦炉煤气系统在异常情况下能安全退出运行，确保系统安全，实现风口喷吹煤气系统单体阀门及阀组的安全联动，实现风口喷吹煤气系统长期稳定运行，以达到节能减排，降低碳排放目标。

Claims (10)

  1. 一种高炉喷吹煤气控制系统，包括焦炉煤气管线、脱碳煤气管线、保护氮气管线以及主煤气管线，其特征在于，所述焦炉煤气管线与脱碳煤气管线连通主煤气管线，主煤气管线分配支管环布至高炉喷气口的喷嘴处，所述保护氮气管线连通主煤气管线，所述各条管线通过组合测点检测管线运行状态，控制系统通过检测点反馈的信息条件，自动联锁调控阀门组，控制管线运行状态，确保煤气喷吹系统安全可靠的运行；所述焦炉煤气连通焦炉煤气净化加压系统，通过加压系统中压缩机将煤气接入本系统连通至主煤气管路，所述焦炉煤气管路接入主煤气管道前在管路上依次安装有压力控制阀PV2101，流量控制阀FV2101和切断阀ZV2101；所述焦炉煤气净化加压系统前的焦炉煤气管路上安装温度测点TE-0001，流量测点FT-0001，压力测点PT-0001，所述焦炉煤气经过吸附塔吸附除去焦炉煤气中的焦油、苯、萘等杂物后进入焦炉煤气压缩机压缩提压至0.7MPa以上；所述压力控制阀PV2101前的管路上安装压力测点PT-2102，压力控制阀PV2101和流量控制阀FV2101之间管路上安装温度测点TE-2101，流量测点FT-2101，压力测点PT-2101；所述高于0.7MPa的脱碳煤气接入本系统，在接入主煤气管路前的管路上依次设置有压力控制阀PV2201，流量控制阀FV2201和切断阀ZV2201；所述压力控制阀PV2201前脱碳煤气管路上安装压力测点PT-2202，压力控制阀PV2201和流量控制阀FV2201之间安装温度测点TE-2201、流量测点FT-2201和压力测点PT-2201。
  2. 根据权利要求1所述的高炉喷吹煤气控制系统，其特征在于，所述 保护氮气管线包括一条氮气主管路直接连通至主煤气管线的管路，以及另一条辅助氮气管路分别接通至各个喷嘴前管线上的管路。
  3. 根据权利要求2所述的高炉喷吹煤气控制系统，其特征在于，所述氮气主管路在接入本系统前依次安装有流量控制阀FV2301和切断阀2301，另一条辅助氮气管路在接入本系统前设置有切断阀3001控制管路的通断，在接入喷嘴前管路的支管路上都设置通断阀控制支管的通断。
  4. 根据权利要求2所述的高炉喷吹煤气控制系统，其特征在于，所述氮气主管路上安装温度测点TE-0002、流量测点FT-0002和压力测点PT-0002，流量控制阀FV2301前安装温度测点TE-2301、流量测点FT-2301和压力测点PT-2301，流量控制阀FV2301后与主煤气管道前安装压力测点PT-0006，辅助氮气管路上切断阀3001后安装压力测点PT-0005。
  5. 根据权利要求1所述的高炉喷吹煤气控制系统，其特征在于，主煤气管线上安装流量测点FT和压力测点PT，在主煤气管道接至各个喷嘴的支管上安装温度测点、流量测点和压力测点。
  6. 控制权利要求1所述控制系统的一种高炉煤气喷吹控制方法，步骤如下：K1：开始喷吹煤气前，控制系统中各处测点信号、各个设备状态信号传输至中控；K2：由中控判断接收到的信号是否为正常运行状态信号；K3：全部为正常运行状态后，由中控给出喷吹信号，启动喷吹煤气控制程序；K4：煤气喷吹过程中，实时监测控制系统中各处运行状态，包括各阀门的运行状态，各个测点检测的运行数据 是否在要求数据范围内，高炉运行状态；K5：停炉停止煤气喷吹时，由中控给出停止喷吹信号，运行煤气喷吹停止程序，停止向炉内喷吹煤气；所述步骤K4控制系统运行过程中各处监测运行状态正常，煤气喷吹程序运行，持续向炉内喷吹煤气，运行过程中各处监测状态有一处运行状态异常，中控立即执行喷吹煤气停止程序，停止煤气供气，并充入保护氮气保护高炉设备。
  7. 根据权利要求6所述的高炉煤气喷吹控制方法，其特征在于，所述步骤K3中启动程序流程如下：步骤1：设备状态正常后启动喷吹程序；步骤2：安保氮气管线上流量控制阀FV2301先给予一个预设开度；步骤3：打开安保氮气管线上切断阀ZV2301；步骤4：安保氮气管线上流量控制阀FV2301跟踪设定流量打开预设开度；步骤5：120秒后打开焦炉煤气管线或脱碳煤气管线上切断阀；步骤6：焦炉煤气管线或脱碳煤气管线上流量控制阀跟踪设定流量打开合适开度；步骤7：焦炉煤气管线或脱碳煤气管线上压力控制阀打开，开度大于设定流量的开度；步骤8：60s内关闭安保氮气管线上流量控制阀FV2301；步骤9：关闭安保氮气管线上切断阀ZV2301，开始焦炉煤气炉内喷吹。
  8. 根据权利要求7所述的高炉煤气喷吹控制方法，其特征在于，所述步骤K5中停止程序流程如下：D1：将安保氮气管线上流量控制阀FV2301开度开至100％全开；D2：打开安保氮气管线上切断阀ZV2301；D3：焦炉煤气管线或脱碳煤气管线上流量控制阀全关；D4：焦炉煤气管线或脱碳煤气管线上切断阀关闭；D5：安保氮气管线上流量控 制阀FV2301关至设定流量；D6：确认安保氮气管线上切断阀ZV2301全开；D7：打开辅助安保氮气管线上切断阀ZV3001；D8；逐渐关闭安保氮气管线上流量控制阀FV2301；D9：关闭喷嘴支管上切断阀；D10：一段时间后，等到氮气将炉内煤气吹扫完成后，关闭辅助安保氮气与喷嘴管线连通的支管上的切断阀；D11：关闭辅助安保氮气管线上的切断阀ZV3001。
  9. 根据权利要求6所述的高炉煤气喷吹控制方法，其特征在于，当出现脱碳煤气异常、焦炉煤气压缩机异常以及阀门误动作导致气压不足或停气情况下，氮气会自动补充进入系统，对系统进行保压和吹扫，确保送煤气系统不倒灌。
  10. 根据权利要求6所述的高炉煤气喷吹控制方发，其特征在于，当出现高炉热风压力异常、高炉冷风压力异常、高炉分口水压异常、软水出口压力异常、浊油泵出口压力异常、煤气围管压力与热风压力差不在正常范围内、安保氮气管线主氮气管路压力异常、脱碳煤气与焦炉煤气的总流量小于预设值等异常状态出现时，氮气自动补充进入系统，对系统进行保压和吹扫。
PCT/CN2022/138699 2022-01-12 2022-12-13 一种高炉喷吹煤气控制系统及控制方法 WO2023134370A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210034716.8A CN114369692B (zh) 2022-01-12 2022-01-12 一种高炉喷吹煤气控制系统及控制方法
CN202210034716.8 2022-01-12

Publications (1)

Publication Number Publication Date
WO2023134370A1 true WO2023134370A1 (zh) 2023-07-20

Family

ID=81143684

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/138699 WO2023134370A1 (zh) 2022-01-12 2022-12-13 一种高炉喷吹煤气控制系统及控制方法

Country Status (2)

Country Link
CN (1) CN114369692B (zh)
WO (1) WO2023134370A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117051183A (zh) * 2023-09-05 2023-11-14 湖北金盛兰冶金科技有限公司 一种高炉炼铁喷吹智能控制系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114369692B (zh) * 2022-01-12 2023-07-04 新疆八一钢铁股份有限公司 一种高炉喷吹煤气控制系统及控制方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020002104A (ko) * 2000-06-29 2002-01-09 이구택 미분탄 취입설비 분배기 압력제어 장치
CN103205515A (zh) * 2013-03-26 2013-07-17 鞍钢股份有限公司 一种高炉喷吹焦炉煤气系统及其方法
JP2019167600A (ja) * 2018-03-26 2019-10-03 日本製鉄株式会社 Ｐｃｉを安定的に行う方法
CN113430311A (zh) * 2021-07-07 2021-09-24 山西晋南钢铁集团有限公司 一种高炉喷吹焦炉煤气的方法
CN113549717A (zh) * 2021-08-18 2021-10-26 新疆八一钢铁股份有限公司 一种高炉喷吹欧冶炉煤气系统
CN114369692A (zh) * 2022-01-12 2022-04-19 新疆八一钢铁股份有限公司 一种高炉喷吹煤气控制系统及控制方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201437540U (zh) * 2009-05-12 2010-04-14 中冶东方工程技术有限公司 高炉喷吹焦炉煤气系统
CN203174123U (zh) * 2013-03-26 2013-09-04 鞍钢股份有限公司 高炉喷吹焦炉煤气系统
CN110241272A (zh) * 2018-03-07 2019-09-17 上海梅山钢铁股份有限公司 一种基于高炉喷吹焦炉煤气的复合低碳炼铁的方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020002104A (ko) * 2000-06-29 2002-01-09 이구택 미분탄 취입설비 분배기 압력제어 장치
CN103205515A (zh) * 2013-03-26 2013-07-17 鞍钢股份有限公司 一种高炉喷吹焦炉煤气系统及其方法
JP2019167600A (ja) * 2018-03-26 2019-10-03 日本製鉄株式会社 Ｐｃｉを安定的に行う方法
CN113430311A (zh) * 2021-07-07 2021-09-24 山西晋南钢铁集团有限公司 一种高炉喷吹焦炉煤气的方法
CN113549717A (zh) * 2021-08-18 2021-10-26 新疆八一钢铁股份有限公司 一种高炉喷吹欧冶炉煤气系统
CN114369692A (zh) * 2022-01-12 2022-04-19 新疆八一钢铁股份有限公司 一种高炉喷吹煤气控制系统及控制方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117051183A (zh) * 2023-09-05 2023-11-14 湖北金盛兰冶金科技有限公司 一种高炉炼铁喷吹智能控制系统
CN117051183B (zh) * 2023-09-05 2024-03-29 湖北金盛兰冶金科技有限公司 一种高炉炼铁喷吹智能控制系统

Also Published As

Publication number Publication date
CN114369692B (zh) 2023-07-04
CN114369692A (zh) 2022-04-19

Similar Documents

Publication Publication Date Title
WO2023134370A1 (zh) 一种高炉喷吹煤气控制系统及控制方法
CN107955848B (zh) 一种高炉机前富氧装置
CN113549717A (zh) 一种高炉喷吹欧冶炉煤气系统
CN104043375A (zh) 高压天然气与低压煤气的混合设备与混合方法
CN204647852U (zh) 压缩机干气密封用氮气供给系统及具有其的甲醇装置
CN102344980B (zh) 冶金企业中高炉鼓风系统的拨风控制方法
CN215799659U (zh) 一种高炉喷吹欧冶炉煤气系统
CN110643761B (zh) 一种高炉炉顶点火方法
CN104854249A (zh) 从高炉风口吹入氧气的设备和高炉操作方法
CN113090952B (zh) 一种大型高炉鼓风机组逆止阀助开装置及操作方法
CN110541051A (zh) 避免3200m3高炉停炉过程中产生炉内爆震的方法
CN214168027U (zh) 热风炉无扰动换炉系统
CN212669745U (zh) 一种提高炼钢rh精炼炉蒸汽品质的节能装置
CN114350874A (zh) 一种防泄漏高炉送气装置及其安装方法
CN113430311A (zh) 一种高炉喷吹焦炉煤气的方法
KR102127691B1 (ko) 펌프 축 실링가스 공급시스템
CN220685182U (zh) 一种高炉保压蒸汽系统与炉顶高压煤气系统的有效隔离装置
CN112780417A (zh) 一种应用氮气隔离的燃气轮机启动优化控制系统及方法
CN202912975U (zh) 一种高炉喷吹焦炉煤气工艺装置
CN212275227U (zh) 氧气专用调节器测试装置
CN111607687A (zh) 一种提高炼钢rh精炼炉蒸汽品质的节能装置和方法
CN219991644U (zh) 一种双重布置的风口保安水装置
CN111715620B (zh) 液氧煤油发动机内腔快速清洗系统及快速清洗方法
CN220081516U (zh) 一种双燃料燃气轮机清吹系统
CN114317854A (zh) 一种高炉炼铁生产中的富氧鼓风的控制方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22920003

Country of ref document: EP

Kind code of ref document: A1