A full-hydrogen annealing furnace for steel processing

Abstract

The present application relates to annealing furnace technical field, disclose a kind of full hydrogen formula annealing furnace for steel processing, comprising: annealing furnace main body, it is equipped with the heating cavity for accommodating steel;Heating and temperature control module, it is located on annealing furnace main body, for the steel located in heating cavity is heated treatment;Atmosphere control module, including three gas supply units uniformly distributed on the upper, middle, lower three positions of heating cavity and the gas delivery unit for uniform delivery gas source to each gas supply unit.The present application is used by integrating atmosphere control module, sensing module and control module, realizes the accurate use and regulation and control of hydrogen, it obtains the steel accumulation form data, determines the regulation and control parameter based on algorithm, the yaw angle and pitch angle of the nozzle in gas supply unit are adaptively adjusted, hydrogen gas flow field can dynamically fit the unique three-dimensional profile of each steel coil, solve the problem of uneven heat field caused by irregular morphology such as steel coil tower shape, wrong side etc..

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of annealing furnace, more particularly, it relates to a full hydrogen type annealing furnace for steel processing. BACKGROUND

[0002] The full hydrogen type annealing furnace is a core heat treatment equipment for processing high-end cold-rolled steel strips (such as electrical steel, automobile plate and stainless steel) in modern steel industry. The high-purity hydrogen gas is used as the protective atmosphere, and the high thermal conductivity and strong reducing property of the hydrogen gas can effectively remove the surface oxides of the steel material, obtain a bright surface, and realize rapid heating and cooling, thereby significantly improving the mechanical properties and electromagnetic properties of the product. The equipment is usually composed of a furnace body, a heating system, an atmosphere system, a circulating cooling system and a control system, and the stability and uniformity of the process directly determine the quality grade of the final product.

[0003] However, in the actual production process, the steel coils to be annealed often have irregular shapes such as tower shape, misaligned edges or ovality after stacking in the furnace, which causes uneven airflow channels between the outer contour of the steel coil and the hearth. Although the traditional full hydrogen annealing furnace can drive the hydrogen gas flow through the circulating fan, the nozzles in the atmosphere system are mostly fixed or only have limited adjustment capability, but it is difficult to adaptively adjust to the unique shape of each steel coil. This causes uneven distribution of hydrogen gas flow in the circumferential and longitudinal directions of the steel coil, which is prone to excessive flow rate and excessive heat exchange in the larger gaps, and insufficient flow rate and delayed heat exchange in the smaller gaps, ultimately forming a difficult-to-eliminate temperature gradient in the steel coil, resulting in defects such as performance difference between the same plates, uneven hardness and magnetic fluctuation. SUMMARY

[0004] The purpose of the present application is to provide a full hydrogen type annealing furnace for steel processing to solve the above technical problems.

[0005] The present application solves the above existing technical problems through the following technical solutions:

[0006] The present application provides a full hydrogen type annealing furnace for steel processing, comprising:

[0007] The annealing furnace body is provided with a heating cavity for accommodating the steel material;

[0008] The heating and temperature control module is arranged on the annealing furnace body and is used for heating treatment of the steel material in the heating cavity;

[0009] The atmosphere control module comprises three gas supply units uniformly distributed on the upper, middle and lower positions of the heating cavity, and a gas supply unit for uniformly supplying the gas source to each gas supply unit;

[0010] A circulation and cooling module is configured to drive the hydrogen gas in the heating cavity to circulate and cool the hydrogen gas;

[0011] A sensing module includes an appearance sensing unit configured to acquire three-dimensional size data of the steel material in the heating cavity and a concentration sensing unit configured to detect the hydrogen gas concentration in the heating cavity;

[0012] A control module is in signal connection with the heating and temperature control module, the atmosphere control module, the circulation and cooling module, and the sensing module, and is configured to perform the following operations:

[0013] Receive the three-dimensional size data from the appearance sensing unit;

[0014] Generate control parameters for each gas supply unit based on the three-dimensional size data;

[0015] Distribute the control parameters to the atmosphere control module to adjust the jet state of the gas supply unit, so that the hydrogen gas flow can adapt to the current accumulation form of the steel material and be uniformly distributed.

[0016] Preferably, the gas supply unit includes a ring-shaped gas supply pipe connected to the gas delivery unit, a plurality of nozzles in communication with the gas supply pipe, and a posture adjustment driving member for driving the plurality of nozzles to swing synchronously in the horizontal and vertical directions.

[0017] Preferably, the gas supply pipe is rotatably connected to the inner wall of the heating cavity, the number of the gas supply pipes is four, the four nozzles are evenly hinged to the gas supply pipe, and each nozzle is in communication with the gas supply pipe through a flexible pipe.

[0018] Preferably, the posture adjustment driving member includes a driving motor, a transmission gear, a transmission gear condition, four deflection gears, and a linear driving source; the driving motor is fixedly installed in the heating cavity, and the output end thereof is fixed with the transmission gear; the outer ring surface of the gas supply pipe is provided with an arc-shaped rack engaged with the transmission gear; each deflection gear is fixedly connected to the corresponding hinged end of the nozzle, the transmission gear condition is engaged with each deflection gear, and the linear driving source is arranged on the gas supply pipe, and the output end thereof is connected with the transmission gear condition.

[0019] Preferably, the control parameters include the hydrogen flow value of each gas supply pipe and the adjustment instructions of the pitch deflection angle and the left-right deflection angle of each nozzle.

[0020] Preferably, the specific steps of generating the control parameters by the control module based on the three-dimensional size data are as follows:

[0021] For each height layer where the gas supply unit is located, the profile radius data of the steel material in the layer is extracted;

[0022] According to the profile radius data, the airflow demand function of each azimuth angle in the layer is calculated;

[0023] Based on the air flow demand function, the pitch deflection angle, the left and right deflection angle of the four corresponding nozzles of the layer are calculated respectively, and the flow value of the air supply pipeline of the layer is calculated.

[0024] Preferably, the gas delivery unit comprises a delivery pump located outside the annealing furnace body and a delivery pipe in communication with the delivery pump, the delivery pipe is in communication with the three air supply pipelines respectively through flexible pipelines, and an electronic valve is arranged at each communication position of the delivery pipe and the air supply pipeline.

[0025] Preferably, the appearance perception unit is a 3D line laser scanner arranged at the inlet end of the annealing furnace body, which obtains the appearance data of the steel material in real time during the process of loading the steel material into the heating cavity.

[0026] Preferably, the concentration perception unit is a plurality of concentration sensors corresponding distributed near the air supply unit;

[0027] The control module dynamically adjusts the air supply strategy of the air supply unit at the corresponding position according to the real-time data of the concentration sensor at different positions during the annealing process.

[0028] Preferably, the circulation and cooling module comprises a variable frequency fan and a heat exchanger, and the control module controls the circulation flow rate of hydrogen by adjusting the rotating speed of the variable frequency fan.

[0029] The beneficial effects of the present application are:

[0030] The present application realizes the precise use and regulation of hydrogen by integrating the atmosphere control module, the perception module and the control module, which mainly uses the appearance perception unit to obtain the steel material stacking form data in real time, determines the regulation parameters based on the preset algorithm, and then adjusts the yaw angle and pitch angle of the nozzles in the air supply unit based on the regulation parameters, so that the hydrogen air flow field can dynamically fit the unique three-dimensional profile of each steel coil, solve the problem of uneven heat field caused by irregular shapes such as steel coil tower shape and edge error, improve the uniformity of product performance, and reduce the hydrogen consumption. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is the overall appearance structure schematic diagram of the full hydrogen type annealing furnace of the present application;

[0032] Figure 2 is the internal structure schematic diagram of the full hydrogen type annealing furnace of the present application;

[0033] Figure 3 is the cross-sectional view of the full hydrogen type annealing furnace of the present application;

[0034] Figure 4 Figure 3 is a local enlarged schematic view of position A in the middle;

[0035] Figure 5 Figure 1 is a structural schematic diagram of the atmosphere control module in the full-hydrogen annealing furnace of the present application;

[0036] Figure 6 Figure 2 is a structural schematic diagram of the relationship between the nozzle and the transmission gear condition in the full-hydrogen annealing furnace of the present application;

[0037] Figure 7 Figure 3 is a structural schematic diagram of the relationship between the nozzle and the posture adjustment driving member in the full-hydrogen annealing furnace of the present application;

[0038] Figure 8 Figure 4 is a block diagram of the relationship between the various modules in the full-hydrogen annealing furnace of the present application;

[0039] Figure 9 Figure 5 is a flowchart of the working process of the full-hydrogen annealing furnace of the present application.

[0040] In the figures:

[0041] 100, annealing furnace main body; 101, furnace body; 1011, heating cavity; 102, top cover;

[0042] 200, heating and temperature control module; 201, electric heater; 202, temperature sensor;

[0043] 300, atmosphere control module; 301, gas supply pipeline; 302, nozzle; 303, delivery pump; 304, delivery pipe; 305, electronic valve; 306, driving motor; 307, transmission gear; 308, transmission gear condition; 309, deflection gear; 310, linear driving source; 311, arc-shaped rack;

[0044] 400, circulation and cooling module; 401, variable frequency fan; 402, heat exchanger;

[0045] 500, sensing module; 501, 3D line laser scanner; 502, concentration sensor. DETAILED DESCRIPTION

[0046] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is merely meant to provide a better understanding of the subject matter described herein and can be changed in function and arrangement without departing from the scope of the present description. Various processes or components can be omitted, substituted, or added according to desired implementations. Additionally, features described with respect to some examples can be combined in other examples.

[0047] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 8The utility model provides a kind of steel processing full hydrogen annealing furnace, comprising: annealing furnace main body 100, heating and temperature control module 200, atmosphere control module 300, circulation and cooling module 400 and sensing module 500.Wherein, annealing furnace main body 100 is made of furnace body 101 and top cover 102, top cover 102 is equipped with sealing structure;And heating cavity 1011 for accommodating steel is provided in furnace body 101.

[0048] Heating and temperature control module 200 is located on annealing furnace main body 100, it is mainly used to heat treatment to the steel located in heating cavity 1011;And heating and temperature control module 200 includes electric heater 201 located in annealing furnace main body 100 and multiple temperature sensors 202 distributed in heating cavity 1011, in the heating process of annealing operation, the temperature inside heating cavity 1011 is detected in real time by temperature sensor 202, and temperature data is fed back to control module in real time, and according to temperature data, control module is adapted to the regulation and control of electric heater 201.

[0049] Circulation and cooling module 400 is mainly used to drive hydrogen in heating cavity 1011 circulation flow and cooling hydrogen;It mainly includes frequency conversion fan 401 on top cover 102 and heat exchanger 402 on furnace body 101, and the circulation flow rate of hydrogen is controlled by adjusting the rotating speed of frequency conversion fan 401 by control module, efficient heat transfer and uniform temperature field can be realized, and the cooling stage is carried out to the strip steel quickly and uniformly.

[0050] Please refer to Figures 2 to 7 Atmosphere control module 300 includes three gas supply units and gas delivery unit uniformly distributed on the upper, middle and lower positions of heating cavity 1011.The gas supply unit includes annular gas supply pipe 301 connected with the gas delivery unit, at least four nozzles 302 communicated with the gas supply pipe 301 and attitude adjustment driving member for driving the nozzles 302 to swing horizontally and vertically.The gas supply pipe 301 is rotatably connected with the inner wall of the heating cavity 1011, the four nozzles 302 are evenly hinged on the gas supply pipe 301, and each nozzle 302 is communicated with the gas supply pipe 301 through a flexible pipe.The gas delivery unit includes a delivery pump 303 located outside the annealing furnace main body 100 and a delivery pipe 304 communicated with the delivery pump 303, the delivery pipe 304 is communicated with the three gas supply pipes 301 through flexible pipes, and an electronic valve 305 is arranged at each communication position of the gas supply pipe 301 for controlling the flow of the gas supply pipe 301.

[0051] Specifically, the posture adjustment driving part comprises a driving motor 306, a transmission gear 307, a transmission gear condition 308, four deflection gears 309, and a linear driving source 310; the driving motor 306 is fixedly installed in the heating cavity 1011, and the output end thereof is fixed with the transmission gear 307; the outer ring surface of the gas supply pipeline 301 is provided with an arc-shaped rack 311 engaged with the transmission gear 307; each deflection gear 309 is correspondingly fixed to the hinged end of the corresponding nozzle 302, the transmission gear condition 308 is engaged with each deflection gear 309, the linear driving source 310 can be an electric push rod, and the number of the electric push rods is at least two, the two electric push rods are symmetrically arranged in the gas supply pipeline 301, and the output end of each electric push rod is connected with the transmission gear condition 308. The transmission gear condition 308 comprises four vertical sliding racks arranged on the gas supply pipeline 301 and an annular plate fixed at the bottom end of the four racks.

[0052] The use process of the above posture adjustment driving part is as follows:

[0053] When the left-right deflection angle of the nozzle 302 is adjusted, the driving motor 306 is rotated to drive the transmission gear 307 to rotate. Since the gas supply pipeline 301 is connected with the conveying pipe 304 through a flexible pipeline, the gas supply pipeline 301 will not be hindered by the conveying pipe 304, but will rotate around the axis together with the arc-shaped rack 311 under the driving action of the transmission gear 307, and the flexible pipeline will be self-adaptively elongated or contracted, and the four nozzles 302 on the gas supply pipeline 301 will also rotate synchronously until the nozzle 302 rotates to the required deflection angle, and then the driving motor 306 stops rotating.

[0054] When the pitch deflection angle of the nozzle 302 is adjusted, the linear driving source 310 is driven to perform the extension and contraction movement to drive the transmission gear condition 308 to linearly move, and the four deflection gears 309 are synchronously rotated under the driving action of the transmission gear condition 308, and the four nozzles 302 are swung upward or downward following the corresponding connected deflection gears 309 until the nozzle 302 swings to the required angle, and then the linear extension and contraction source stops the extension and contraction. In this way, by controlling the rotation direction and rotation speed of the driving motor 306 and the extension and contraction amount and speed of the linear driving source 310, the pitch deflection angle and the left-right deflection angle of the nozzle 302 can be accurately controlled, and the jet direction of the nozzle 302 is adjusted, so that the hydrogen gas flow can adapt to the current stacking mode of the steel material and be uniformly distributed. In addition, the posture adjustment driving part has a highly mechanically synchronized simplified design, realizes the posture adjustment function of the multiple nozzles 302, has a lower actual use cost, high stability, and is easy to control, and ensures the reliability and economy of the system.

[0055] The perception module 500 comprises an appearance perception unit for acquiring three-dimensional size data of the appearance of the steel material in the heating cavity 1011 and a concentration perception unit for detecting the hydrogen concentration in the heating cavity 1011. The appearance perception unit is a 3D line laser scanner 501 arranged at the inlet end of the annealing furnace body 100, which acquires appearance data of the steel material in real time during the process of loading the steel material into the heating cavity 1011. The concentration perception unit is a plurality of concentration sensors 502 corresponding to the gas supply units; the control module dynamically adjusts the gas supply strategy of the corresponding gas supply unit according to the real-time data of the concentration sensors 502 at different positions during the annealing process.

[0056] The control module is signal-connected with the heating and temperature control module 200, the atmosphere control module 300, the circulation and cooling module 400 and the perception module 500, and is configured to perform:

[0057] receive the three-dimensional size data from the appearance perception unit; based on the three-dimensional size data, generate control parameters for each gas supply unit, the control parameters comprising a hydrogen flow value of each gas supply pipe 301 and adjustment instructions of the pitch deflection angle and the left-right deflection angle of each nozzle 302;

[0058] issue the control parameters to the atmosphere control module 300 to adjust the jet state of the gas supply unit, so that the hydrogen gas flow can adapt to the current stacking mode of the steel material and be uniformly distributed.

[0059] The working process of the full-hydrogen annealing furnace of the present application is as follows:

[0060] Step S100: loading and data acquisition.

[0061] The steel material to be annealed is hoisted into the heating cavity 1011 in the annealing furnace body 100, and in this process, the appearance perception unit starts to perform three-dimensional scanning on the steel material to acquire high-precision point cloud data of the outer surface thereof, and uploads the three-dimensional size data to the control module.

[0062] Step S200: data processing and initial strategy generation.

[0063] After the control module receives the three-dimensional point cloud data, it executes the algorithm program pre-stored therein to calculate the optimal initial jet strategy based on the actual stacking mode of the steel material:

[0064] S201: process the point cloud data, reconstruct the three-dimensional model of the steel material, and extract the cross-sectional profile of the steel material at the height layer (upper, middle and lower) where the three gas supply units are located; acquire the steel profile radius data R(θ) at different azimuth angles θ on each height layer i;

[0065] S202: for each height layer i, calculate the airflow demand function of each point in the circumferential direction of the layer according to the profile radius data thereof:

[0066]

[0067] where k is a proportionality coefficient (dimension m −1 ) set according to process requirements to adjust the response sensitivity of the system to profile deviation; the physical meaning of this formula is that the larger the radius R(θ), the farther the steel surface is from the nozzle 302, and a stronger relative airflow impact needs to be allocated for heat exchange compensation to achieve uniform heating / cooling. req The value of F(θ) itself does not represent the absolute flow rate or pressure, but is used in subsequent calculations to allocate the weight of the total airflow between different azimuth angles.

[0068] S203: For each layer, calculate the average airflow demand F j and the airflow demand centroid azimuth angle θ j for each of the four nozzles 302 (j = 1, 2, 3, 4 corresponding to front, rear, left, right respectively) in the azimuth angle range (usually [φ avg-j -45°, φ centroid-j +45°]) they are responsible for, with the specific calculation formula being:

[0069]

[0070]

[0071] S203: Based on the above calculation results, generate an initial control strategy for each gas supply unit and nozzle 302:

[0072] The yaw angle (left-right deflection angle) of the nozzle 302 is calculated according to the formula:

[0073]

[0074] The yaw angle of each nozzle 302 needs to be adjusted; where this formula is used to accurately position the direction of airflow focus to compensate for the "uncircularity" of the steel (such as an ellipse, a tower shape);

[0075] The pitch angle (up-down pitch angle) of the nozzle 302 is calculated according to the formula:

[0076]

[0077] The pitch angle of each nozzle 302 is calculated; where c is a nozzle 302 characteristic constant calibrated through experiments, and Q i is the estimated flow rate of the layer. This formula converts the airflow intensity demand into the inclination angle of the nozzle 302, and the larger the average demand area, the smaller the pitch angle of the nozzle 302, the more concentrated the airflow, and the farther the jet distance;

[0078] Layer flow: an initial hydrogen flow set value Q is calculated for each gas supply unit i :

[0079]

[0080] wherein k q is a flow ratio coefficient;

[0081] Instruction conversion: the control module converts the calculated target yaw angle (β j ) and pitch angle (α j ) of the four nozzles 302 into specific instructions for driving the attitude adjustment drives, including the rotation angle / speed of the driving motor 306 and the extension amount of the linear driving source 310.

[0082] Step S300: actuator adjustment and atmosphere establishment.

[0083] The control module issues the generated initial control strategy to each actuator:

[0084] S301: the control module adjusts the opening of the electronic valve 305 on each gas supply pipeline 301 to control the hydrogen flow to the calculated Q i ;

[0085] S302: adjust the yaw angle of the nozzle 302: the driving motor 306 rotates according to the instruction, and through the meshing of the transmission gear 307 and the arc-shaped rack 311, it drives the entire gas supply pipeline 301 to rotate around its axis; the rotation of the gas supply pipeline 301 drives the four nozzles 302 on it to rotate around the center axis of the heating cavity 1011 simultaneously, and adjusts the yaw angle to the target value β j ;

[0086] S303: adjust the pitch angle of the nozzle 302: the electric push rod extends and retracts according to the instruction, pushes or pulls the transmission gear condition 308 to move up and down, drives the four deflection gears 309 meshed with it to rotate synchronously, thereby driving the four nozzles 302 to pitch around their hinge points, and adjusts the pitch angle to the target value α j ;

[0087] S304: at the same time, the circulation and cooling module 400 is started, and the variable frequency fan 401 works to drive the hydrogen to circulate in the furnace. The control module accurately controls the purging and hydrogen charging process according to the data of the concentration sensing unit, until the atmosphere in the furnace reaches the required purity and pressure.

[0088] Step S400: annealing process and dynamic optimization.

[0089] During the heating and holding stage, the system enters a closed-loop dynamic optimization mode:

[0090] S401: The heating and temperature control module 200 heats the steel according to the set process curve, the electric heater 201 works, and the temperature sensor 202 monitors the temperature in real time;

[0091] S402: The control module compares the real-time temperature field with the ideal temperature field, and if the temperature uniformity deviation (such as the temperature of a certain area is continuously low) is found, adaptive regulation is performed.

[0092] Step S500: Cooling and ending.

[0093] When the heat preservation stage ends, the system enters the cooling stage:

[0094] S501: The control module controls the electric heater 201 to stop working, increases the rotating speed of the variable frequency fan 401 and the cooling capacity of the heat exchanger 402, and performs rapid and uniform forced cooling on the steel according to the cooling curve;

[0095] S502: During the cooling process, the atmosphere flow field can be maintained or adjusted according to the temperature condition;

[0096] S503: Finally, the control module controls the atmosphere control module 300 to stop supplying gas, and nitrogen is introduced for purging and replacement. After the atmosphere is safe, the top cover 102 is opened, the steel is taken out, and the annealing operation is ended.

[0097] From the above scheme, it can be known that the full hydrogen type annealing furnace designed by the application realizes the precise use and regulation of hydrogen by the integrated use of the atmosphere control module 300, the sensing module 500 and the control module. It mainly uses the appearance sensing unit to obtain the steel stacking shape data in real time, determines the regulation parameters based on the preset algorithm, and then adaptively adjusts the yaw angle and pitch angle of the nozzle 302 in the gas supply unit based on the regulation parameters. The hydrogen gas flow field can dynamically fit the unique three-dimensional profile of each steel coil, solve the problem of uneven heat field caused by irregular shapes such as steel coil tower shape and edge deviation, improve the uniformity of product performance (such as plate difference and magnetic consistency), and also reduce the hydrogen consumption to a certain extent.

[0098] The embodiments of the application are described above, but the application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative and not limiting. Those skilled in the art can make many forms under the inspiration of the application, which all belong to the protection of the application.

Claims

1. A fully hydrogen-based annealing furnace for steel processing, characterized in that, The application relates to an annealing furnace, which comprises the following parts: an annealing furnace body, a heating and temperature control module, an atmosphere control module, a circulation and cooling module, a sensing module and a control module. The annealing furnace body is internally provided with a heating cavity for accommodating steel materials. The heating and temperature control module is arranged on the annealing furnace body and is used for heating treatment of the steel materials in the heating cavity. The atmosphere control module comprises three gas supply units uniformly distributed on the upper, middle and lower positions of the heating cavity and a gas conveying unit used for uniformly conveying a gas source to each gas supply unit. The circulation and cooling module is used for driving hydrogen in the heating cavity to flow in a circulating manner and cooling the hydrogen. The sensing module comprises an appearance sensing unit used for acquiring three-dimensional size data of the appearance of the steel materials in the heating cavity and a concentration sensing unit used for detecting the hydrogen concentration in the heating cavity. The control module is signal-connected with the heating and temperature control module, the atmosphere control module, the circulation and cooling module and the sensing module and is configured to perform the following steps: receiving the three-dimensional size data from the appearance sensing unit; generating control parameters for each gas supply unit based on the three-dimensional size data; and issuing the control parameters to the atmosphere control module so as to adjust the jetting state of the gas supply unit, so that the hydrogen gas flow can adapt to the current stacking mode of the steel materials and be uniformly distributed. The gas supply unit comprises a ring-shaped gas supply pipeline connected with the gas conveying unit, a plurality of nozzles communicated with the gas supply pipeline and a posture adjusting driving element used for driving the plurality of nozzles to synchronously swing in the horizontal and vertical directions. The posture adjusting driving element comprises a driving motor, a transmission gear, a transmission tooth condition, four deflection gears and a linear driving source; the driving motor is fixedly installed in the heating cavity and has an output end fixed with the transmission gear; the outer ring surface of the gas supply pipeline is provided with an arc-shaped rack engaged with the transmission gear; each deflection gear is correspondingly fixed to the hinged end of a corresponding nozzle, the transmission tooth condition is engaged with each deflection gear, and the linear driving source is arranged on the gas supply pipeline and has an output end connected with the transmission tooth condition. The gas supply pipeline is rotationally connected with the inner wall of the heating cavity, the number of the nozzles is four, the four nozzles are uniformly hinged on the gas supply pipeline and are communicated with the gas supply pipeline through flexible pipelines. The control parameters comprise the hydrogen flow value of each gas supply pipeline and the adjustment instructions of the pitch deflection angle and the left-right deflection angle of each nozzle. The specific steps of generating the control parameters based on the three-dimensional size data are as follows: for each height layer where the gas supply unit is located, the profile radius data of the steel materials in the layer are extracted; the airflow demand function of each azimuth around the layer is calculated according to the profile radius data; the pitch deflection angle and the left-right deflection angle of the four nozzles corresponding to the layer are respectively calculated based on the airflow demand function, and the flow value of the gas supply pipeline of the layer is calculated.

2. The full-hydrogen annealing furnace for steel processing according to claim 1, characterized in that, The gas conveying unit comprises a conveying pump located outside the annealing furnace body and a conveying pipeline communicated with the conveying pump; the conveying pipeline is communicated with the three gas supply pipelines through flexible pipelines respectively, and an electronic valve is arranged at each communication position of the conveying pipeline and the gas supply pipeline.

3. The hydrogen-type annealing furnace for steel material processing according to claim 1, characterized in that, The appearance sensing unit is a 3D line laser scanner arranged at the inlet end of the annealing furnace body; the 3D line laser scanner can acquire the appearance data of the steel materials in real time during the process of loading the steel materials into the heating cavity.

4. The full-hydrogen annealing furnace for steel processing according to claim 1, characterized in that, The concentration sensing unit comprises a plurality of concentration sensors correspondingly distributed near the gas supply units. ​ ​ ​ 5. The full-hydrogen annealing furnace for steel processing according to claim 1, characterized in that, ​ 6. The hydrogen atmosphere annealing furnace for steel processing according to claim 1, characterized in that, ​ 7. The hydrogen atmosphere annealing furnace for steel material processing according to claim 1, characterized in that, ​ The control module dynamically adjusts the gas supply strategy of the gas supply unit at the corresponding position according to the real-time data of the concentration sensor at different positions during the annealing process.

8. The hydrogen atmosphere annealing furnace for steel material processing according to claim 1, characterized by The circulation and cooling module comprises a variable frequency fan and a heat exchanger, and the control module controls the circulation flow rate of hydrogen by adjusting the rotating speed of the variable frequency fan.

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