Gantry type pretreatment pickling production line for strip steel production

Abstract

The invention discloses a gantry type pretreatment pickling production line for strip steel production, and relates to the technical field of strip steel production and treatment. Comprising a pickling tank, a multi-runner acid liquor circulation system, a self-adaptive tension control system, a modular heating and cooling device, a real-time waste liquor separation and regeneration system, a strip steel surface intelligent detection system and an energy-saving air drying device, the pickling tank is fixedly arranged in the middle of a gantry frame structure, and a movable partition plate is arranged in the pickling tank; the movable partition plate is in sliding connection with the pickling tank body through a partition plate adjusting device, and the partition plate adjusting device comprises a servo motor and a lead screw sliding rail. By installing the multi-runner acid liquor circulating system, the all-directional pickling spraying function is achieved, the problems that liquid distribution in a traditional pickling tank is uneven, and the pickling quality difference is obvious are solved, the pickling uniformity is improved, the acid liquor utilization rate is increased, and the surface treatment stability in mass production is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of strip steel production and processing, in particular to a gantry type pre-treatment pickling production line for strip steel production. Background Art

[0002] In the modern strip steel production process, the pre-treatment process is a crucial link, especially the pickling and drying process, which directly affects the surface quality of the strip steel and the effect of the subsequent process. The pickling process removes impurities such as oxides and rust on the surface of the strip steel to improve the surface quality of the strip steel and enhance the surface adhesion. However, after pickling, the surface of the strip steel still contains a certain amount of moisture, and it needs to be dried to ensure that it meets the requirements of the subsequent process.

[0003] In addition, in order to improve production efficiency and reduce energy consumption, technologies such as automated control and waste liquid regeneration have been widely used in strip steel production lines. Therefore, this application proposes a gantry-type pre-treatment pickling production line for strip steel production to solve the technical defects existing in the current traditional production lines.

[0004] 1. Patent document CN113235155B discloses a steady-current control system for electrolytic pickling of tire bead wire production lines. The above patent realizes the automatic adjustment of the current optimal pickling current value according to the production changes of the production line, so that the surface treatment effect of each specification of groove steel wire tends to the optimal state, ensuring the consistency of the steel wire cleaning effect and the stability of the adhesion, but the above patent cannot realize the all-round pickling spray function.

[0005] 2. Patent document CN111793801B discloses a pickling slag remover and its preparation method and application. The above patent has the advantages of excellent cleaning effect, equipment protection, good environmental protection, etc., and can continuously strip and dissolve the phosphating slag on the surface of the cleaned equipment, but the above patent cannot realize the real-time detection function of the strip surface.

[0006] 3. Patent document CN101602042B discloses an automatic powder spraying line for automobile hub decoration parts and its process. The above patent achieves a high degree of automation, is suitable for mass production, has high production efficiency and low cost; the production process of the production line is more reasonable, and the surface color and thickness of the device processed by powder spraying are more uniform, but the above patent cannot achieve the drying function after the strip pickling treatment.

[0007] 4. Patent document CN108705858B discloses a four-color metal printing continuous production line. The above patent achieves a small footprint and light environmental pollution. It can provide a certain operating time for the overlap of the upper roll by placing steel strips, and effectively reduce the leakage of organic waste gas into the production workshop. It can realize continuous and uninterrupted production of four-color metal printing, but the above patent cannot realize the recycling function of pickling waste liquid.

[0008] In summary, the above patents cannot realize the functions of all-round pickling spraying, real-time detection of the strip surface, drying of the strip after pickling treatment, and recycling of pickling waste liquid, resulting in unqualified pickling treatment, poor resource utilization, low batch production efficiency and environmental pollution. To this end, the present application proposes a gantry-type pre-treatment pickling production line for strip steel production that can realize all-round pickling spraying function, real-time detection function of the strip steel surface, drying function after strip steel pickling treatment and recycling function of pickling waste liquid. Summary of the invention

[0009] The object of the present invention is to provide a gantry-type pre-treatment pickling production line for strip steel production, so as to solve the technical problems proposed in the above-mentioned background technology that the all-round pickling spray function, the real-time detection function of the strip steel surface, the drying function of the strip steel after pickling treatment and the recycling function of the pickling waste liquid cannot be realized, resulting in unqualified pickling treatment, poor resource utilization, low batch production efficiency and environmental pollution.

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gantry-type pre-treatment pickling production line for strip steel production, comprising a pickling tank, a multi-channel acid liquid circulation system, an adaptive tension control system, a modular heating and cooling device, a waste liquid real-time separation and regeneration system, a strip steel surface intelligent detection system and an energy-saving air drying device, wherein the pickling tank is fixedly arranged in the middle of the gantry frame structure, a movable partition is arranged in the pickling tank, and the movable partition is slidably connected to the pickling tank body through a partition adjustment device, and the partition adjustment device comprises a servo motor and a lead screw slide rail, the output shaft of the servo motor is fixedly connected to the lead screw slide rail through a coupling, and the movable partition is slidably installed on the lead screw slide rail; The multi-channel acid liquid circulation system is connected to the pickling tank, adaptive tension control systems are installed at both ends of the gantry frame, the modular heating and cooling device is integrated with the pickling tank, the waste liquid real-time separation and regeneration system is connected to the waste liquid outlet at the bottom of the pickling tank, and the strip surface intelligent detection system is arranged between the pickling tank outlet and the energy-saving air drying device inlet.

[0011] Preferably, the acid in the multi-channel acid circulation system is connected to the main circulation pump through a circulation pipe, the outlet of the main circulation pump is divided into multiple channels, which are respectively connected to the branch pipes, and the branch pipes are installed on the inner wall of the pickling tank through a nozzle assembly.

[0012] Preferably, the adaptive tension control system includes a traction roller and a unwinding roller, which are respectively mounted on the gantry frames at both ends of the pickling tank through rotating shafts, the traction roller is connected to the servo motor drive system, and a tension sensor is installed on the rotating shaft of the unwinding roller, and the tension sensor is connected to the controller through a signal line.

[0013] Preferably, the heating device in the modular heating and cooling device includes an electric heating tube arranged at the bottom of the pickling tank, and the cooling device in the modular heating and cooling device includes a cooling spiral tube installed on the outer wall of the pickling tank, the cooling spiral tube is connected to the coolant delivery system through a quick interface, and the electric heating tube is connected to the temperature controller through a temperature control circuit.

[0014] Preferably, the waste liquid outlet in the waste liquid real-time separation and regeneration system is connected to the liquid collecting tank through a pipeline, the liquid collecting tank is connected to the solid-liquid separator and the chemical precipitation device through a separation pipeline, and the outlet of the chemical precipitation device is connected to the main circulation pump inlet of the multi-channel acid liquid circulation system through a reflux pipeline.

[0015] Preferably, the strip steel surface intelligent detection system includes an industrial camera and a laser scanner, the industrial camera is fixedly mounted on a detection bracket, the laser scanner is fixed on a gantry frame via a connecting arm, and the industrial camera and the laser scanner are connected to a data processor via a signal line.

[0016] Preferably, the energy-saving air drying device includes a hot air circulation duct and an infrared heating module. One end of the hot air circulation duct is connected to the outlet of the pickling tank, and the other end is connected to the waste heat recovery device through a circulating fan. The infrared heating module is installed on the top of the energy-saving air drying device and is integrated with the temperature control system through an electronic control module.

[0017] Preferably, the servo motor is equipped with a position detection sensor at the sliding connection between the coupling and the movable partition, which is used to monitor the real-time position of the movable partition. The position detection sensor is connected to the main controller through a signal line. The nozzle assembly is arranged at multiple angles, and the direction of the nozzle outlet is at an angle of 20° to 40° with the surface of the strip. The nozzle and the diversion pipe are connected by a rotating joint to achieve dynamic adjustment of the injection direction.

[0018] Preferably, the surface of the electric heating tube of the heating device is coated with an anti-corrosion coating, the cooling spiral tube is made of polyvinylidene fluoride material, the coolant delivery system includes a coolant pump and a coolant storage tank, the coolant pump is connected to the cooling spiral tube through inlet and outlet liquid pipes, the chemical precipitation device in the waste liquid real-time separation and regeneration system includes a sedimentation tank, a dosing device and a stirring device, the dosing device is connected to the sedimentation tank through a delivery pipe, the stirring device is installed at the bottom of the sedimentation tank, and is driven by a motor to achieve uniform mixing of the precipitate.

[0019] Preferably, the hot air circulation duct of the energy-saving air drying device adopts a double-layer insulation structure, and guide blades are arranged inside to evenly distribute the hot air flow rate. The infrared heating module adopts a wavelength-adjustable infrared radiation element to adapt to different strip surface drying requirements. The industrial camera and laser scanner in the strip surface intelligent detection system are connected to the detection bracket through an adjustable mounting arm. The detection bracket is fixed to the gantry frame by bolts. The height and angle of the detection bracket are adjustable to meet the surface detection requirements of strips of different specifications.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention realizes the all-round pickling spraying function by installing a multi-channel acid liquid circulation system, solves the problem of uneven liquid distribution in the traditional pickling tank and obvious pickling quality difference, improves the pickling uniformity, improves the acid liquid utilization rate, and ensures the surface treatment stability in mass production; 2. The present invention realizes the real-time detection function of the strip surface by installing an intelligent strip surface detection system, solves the problems of low efficiency, high misjudgment rate and inability to feedback quality information in real time in traditional manual detection, reduces the defective rate, and improves the automation level and production efficiency; 3. The present invention realizes the drying function after the pickling treatment of the steel strip by installing an energy-saving air drying device, solves the problem of insufficient drying in the traditional pickling process, ensures the drying quality of the steel strip, adapts to the production requirements of steel strips of different specifications and materials, improves drying efficiency, reduces energy consumption, and saves energy costs; 4. The present invention realizes the recycling function of pickling waste liquid by installing a real-time separation and regeneration system for waste liquid, solves the technical problems of increased production costs and environmental pollution, significantly reduces the discharge of pickling waste liquid, reduces environmental protection treatment costs, extends the service life of acid liquid, reduces the frequency of acid liquid replacement, improves economic benefits, and meets green production requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the pickling production line of the present invention.

[0022] In the figure: 1. Pickling tank; 2. Multi-channel acid circulation system; 3. Adaptive tension control system; 4. Modular heating and cooling device; 5. Real-time separation and regeneration system for waste liquid; 6. Intelligent detection system for strip surface; 7. Energy-saving air drying device; 11. Movable partition; 12. Partition adjustment device; 21. Circulation pipeline; 22. Main circulation pump; 23. Diversion pipeline; 24. Nozzle assembly; 31. Pulling roller; 32. Unwinding roller; 33. Servo motor drive system; 34. Tension sensor; 41. Electric heating tube; 42. Cooling spiral tube; 43. Temperature controller; 51. Waste liquid outlet; 52. Liquid collecting tank; 53. Solid-liquid separator; 54. Chemical precipitation device; 55. Reflux pipeline; 61. Industrial camera; 62. Laser scanner; 63. Data processor; 71. Hot air circulation pipeline; 72. Infrared heating module; 121. Servo motor; 122. Screw guide rail. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] See also Figure 1, an embodiment provided by the present invention: a gantry type pre-treatment pickling production line for strip steel production, comprising a pickling tank 1, a multi-channel acid liquid circulation system 2, an adaptive tension control system 3, a modular heating and cooling device 4, a waste liquid real-time separation and regeneration system 5, a strip steel surface intelligent detection system 6 and an energy-saving air drying device 7, wherein the pickling tank 1 is fixedly arranged in the middle of the gantry frame structure, a movable partition 11 is arranged in the pickling tank 1, and the movable partition 11 is slidably connected to the pickling tank 1 body through a partition adjustment device 12, and the partition adjustment device 12 comprises a servo motor 121 and a lead screw slide 122, and the output shaft of the servo motor 121 is fixedly connected to the lead screw slide 122 through a coupling, and the movable partition 11 is slidably installed on the lead screw slide 122; The multi-channel acid liquid circulation system 2 is connected to the pickling tank 1, adaptive tension control systems 3 are installed at both ends of the gantry frame, the modular heating and cooling device 4 is integrated with the pickling tank 1, the waste liquid real-time separation and regeneration system 5 is connected to the waste liquid outlet 51 at the bottom of the pickling tank 1, and the strip steel surface intelligent detection system 6 is arranged between the outlet of the pickling tank 1 and the inlet of the energy-saving air drying device 7; The servo motor 121 is provided with a position detection sensor at the sliding connection between the coupling and the movable partition 11, which is used to monitor the real-time position of the movable partition 11. The position detection sensor is connected to the main controller through a signal line. The nozzle assembly 24 is arranged at multiple angles, and the direction of the nozzle outlet is at an angle of 20° to 40° with the surface of the strip. The nozzle is connected to the diversion pipe 23 through a rotary joint to achieve dynamic adjustment of the injection direction. Further, start the main controller, check whether the working status of the servo motor 121, the lead screw slide 122, the main circulation pump 22, the temperature controller 43 and the adaptive tension control system 3 are normal, set the initial position of the movable partition 11 according to the strip specifications, adjust the sliding position of the partition slide by controlling the servo motor 121, the position detection sensor monitors and feeds back the position of the partition to the main controller in real time, set the pickling solution temperature, flow rate and acid concentration parameters and check whether the angle adjustment of the nozzle assembly 24 is flexible; Acid is injected into the pickling tank 1, and the multi-channel acid circulation system 2 is started. The main circulation pump 22 drives the acid through the circulation pipeline 21 flow nozzle assembly 24 to check the connection between the waste liquid outlet 51 and the waste liquid real-time separation and regeneration system 5 to ensure that the waste liquid can be smoothly discharged into the liquid collection tank 52; The strip begins to unwind from the unwinding roller 32 and enters the pickling tank 1 through the traction roller 31 of the adaptive tension control system 3. The tension sensor 34 detects the tension of the strip in real time and feeds back the signal to the control system, controls the servo motor drive system 33 to adjust the rotation speed of the traction roller 31, and ensures that the strip runs smoothly in the pickling tank 1. When the strip enters the pickling tank 1, the acid is sprayed through the nozzle assembly 24 at multiple angles to evenly cover the surface of the strip. The angle between the nozzle and the surface of the strip is maintained between 20° and 40°. The nozzle assembly 24 automatically adjusts the spraying direction through the rotary joint to adapt to strips of different widths and surface conditions. During the acid spraying process, 22 maintains the circulation of the acid to ensure that the acid concentration in the pickling tank 1 is uniform. The diversion pipe 23 sprays the acid from the multiple channels to the surface of the strip, and returns to the inlet of the main circulation pump through the drainage port at the bottom of the pickling tank 1. The modular heating and cooling device 4 keeps the pickling liquid within the set temperature range, the electric heating tube 41 achieves rapid temperature rise, the cooling spiral tube 42 adjusts the excessive temperature of the acid solution, and the temperature sensor feeds back the temperature signal of the acid solution in the tank to the temperature controller 43 to ensure the temperature stability in the pickling tank 1. According to the strip specifications and process requirements, the servo motor 121 adjusts the sliding position of the movable partition 11 to limit the flow range of the acid solution and improve the pickling efficiency; The waste liquid generated during the pickling process flows into the waste liquid real-time separation and regeneration system 5 through the waste liquid outlet 51 at the bottom of the pickling tank 1. After the solid impurities are filtered out of the waste liquid through the collecting tank 52, the waste liquid enters the chemical precipitation device 54 for impurity precipitation treatment. The precipitated waste liquid is separated from the metal ions by the electrolytic recovery device. The purified acid liquid is returned to the multi-channel acid liquid circulation system 2 through the reflux pipe 55 for reuse. After leaving the pickling tank 1, the strip enters the strip surface intelligent detection system 6. The industrial camera 61 and the laser scanner 62 collect the surface image and shape data of the strip. The data processor 63 performs intelligent analysis on the surface cleanliness and finish. If the detection system finds that the surface treatment does not meet the standard, the main controller automatically adjusts the acid concentration, the injection angle or the partition position to improve the pickling effect. The qualified strip enters the energy-saving air drying device 7. The hot air circulation pipe 71 sprays hot air to evaporate the surface moisture. The infrared heating module 72 further dries the strip. After drying, the strip is wound by the winding roller. During the drying process, the humidity sensor detects the moisture content on the strip surface and adjusts the hot air circulation speed and the infrared heating intensity. It realizes efficient, energy-saving and environmentally friendly pickling treatment of strip steel, ensuring product quality while reducing production costs and environmental pollution.

[0027] See also Figure 1, an embodiment provided by the present invention: a gantry type pre-treatment pickling production line for strip steel production, the acid in the multi-channel acid circulation system 2 is connected to the main circulation pump 22 through the circulation pipeline 21, the outlet of the main circulation pump 22 is divided into multiple channels, which are respectively connected to the branch pipeline 23, and the branch pipeline 23 is installed on the inner wall of the pickling tank 1 through the nozzle assembly 24; The adaptive tension control system 3 includes a traction roller 31 and an unwinding roller 32, which are respectively mounted on the gantry frames at both ends of the pickling tank 1 through rotating shafts, the traction roller 31 is connected to the servo motor drive system 33, and a tension sensor 34 is installed on the rotating shaft of the unwinding roller 32, and the tension sensor 34 is connected to the controller through a signal line; Further, the main controller starts the main circulation pump 22, and the acid is extracted from the circulation pipe 21 at the bottom of the pickling tank 1 and enters the main circulation pump 22. The outlet of the main circulation pump 22 is divided into multiple independent channels, and the acid is transported to the nozzle assembly 24 through the shunt pipe 23. The end of the shunt pipe 23 is connected to the nozzle assembly 24 installed on the inner wall of the pickling tank 1. The nozzle assembly 24 is arranged at multiple angles, and its outlet direction forms an angle of 20° to 40° with the surface of the strip. The nozzle is installed through a rotating joint, and the injection direction can be dynamically adjusted according to the width of the strip and the process requirements to achieve uniform distribution of the acid. The injected acid evenly covers the surface of the strip to remove the surface oxide layer and impurities, while ensuring that the acid has a consistent treatment intensity on the surface of the strip. The acid sprayed to the surface of the strip returns to the circulation pipe 21 through the reflux outlet at the bottom of the pickling tank 1, and re-enters the circulation system through the main circulation pump 22. During the production process, the waste liquid is discharged to the waste liquid real-time separation and regeneration system 5 through the waste liquid outlet 51 in real time to ensure the fluidity of the acid circulation system and the stability of the acid concentration. The unwinding roller 32 gradually releases the strip steel coil, and the strip steel enters the pickling tank 1 through the gantry frame. The tension sensor 34 installed on the rotating shaft of the unwinding roller 32 detects the tension of the strip steel in real time. The tension sensor 34 transmits the detected tension signal to the main controller, and adjusts the release speed of the unwinding roller 32 and the stretching force of the traction roller 31 according to the feedback data; after the strip steel enters the pickling tank 1, the traction force is provided by the traction roller 31, and the traction roller 31 is connected to the main controller through the servo motor drive system 33. The main controller adjusts the speed of the servo motor drive system 33 according to the real-time data of the tension sensor 34 to ensure that the strip steel maintains a constant tension in the pickling tank 1. The position of the constant tension ensures the smooth operation of the strip steel in the pickling tank 1, avoiding wrinkles or strip breaks caused by uneven tension; When the strip specifications or running speed change, the tension sensor 34 automatically detects the new tension state, and the main controller adjusts the rotation speed of the servo motor drive system 33 and the unwinding roller 32 in real time according to the feedback data to keep the strip tension within the set range. If the strip width is large or the thickness is uneven, the main controller balances the tension distribution by adjusting the working torque of the traction roller 31 to avoid uneven force on the strip surface during pickling; It can realize efficient, continuous and stable strip pickling treatment, while having high quality and high flexible production capabilities.

[0028] See also Figure 1 , an embodiment provided by the present invention: a gantry type pre-treatment pickling production line for strip steel production, the heating device in the modular heating and cooling device 4 includes an electric heating tube 41 arranged at the bottom of the pickling tank 1, the cooling device in the modular heating and cooling device 4 includes a cooling spiral tube 42 installed on the outer wall of the pickling tank 1, the cooling spiral tube 42 is connected to the coolant delivery system through a quick interface, and the electric heating tube 41 is connected to the temperature controller 43 through a temperature control circuit; The waste liquid outlet 51 in the waste liquid real-time separation and regeneration system 5 is connected to the liquid collecting tank 52 through a pipeline, the liquid collecting tank 52 is connected to the solid-liquid separator 53 and the chemical precipitation device 54 through a separation pipeline, and the outlet of the chemical precipitation device 54 is connected to the inlet of the main circulation pump 22 of the multi-channel acid liquid circulation system 2 through a reflux pipeline 55; The surface of the electric heating tube 41 of the heating device is coated with an anti-corrosion coating, the cooling spiral tube 42 is made of polyvinylidene fluoride material, the coolant delivery system includes a coolant pump and a coolant storage tank, the coolant pump is connected to the cooling spiral tube 42 through an inlet and outlet liquid pipeline, the chemical precipitation device 54 in the waste liquid real-time separation and regeneration system 5 includes a sedimentation tank, a dosing device and a stirring device, the dosing device is connected to the sedimentation tank through a delivery pipe, the stirring device is installed at the bottom of the sedimentation tank, and is driven by a motor to achieve uniform mixing of the sediment; Furthermore, the thermostat 43 presets the target temperature range of the pickling solution, and controls the start and power output of the electric heating tube 41 through the temperature control circuit according to the detected real-time temperature. When the temperature of the pickling solution exceeds the set value, the thermostat 43 controls the start of the coolant pump through a signal, and the coolant is transported from the coolant storage tank to the cooling spiral tube 42. The electric heating tube 41 and the cooling spiral tube 42 work alternately to ensure that the temperature of the pickling solution is stable within the process requirement range of 40° to 70°. The coolant returns to the coolant storage tank after heat exchange with the acid solution through the cooling spiral tube 42 for recycling. The quick interface design facilitates the rapid disassembly and cleaning of the pipeline, thereby improving the system maintenance efficiency. The thermostat 43 integrates an overheating protection function. When the temperature rises abnormally or the cooling fails, the thermostat 43 will automatically shut down the electric heating tube 41 and alarm, and start the standby coolant pump to maintain temperature stability. The waste liquid generated during the pickling process flows into the liquid collecting tank 52 through the waste liquid outlet 51 at the bottom of the pickling tank 1 through a pipeline. The primary filtering device of the liquid collecting tank 52 removes larger solid impurities to prevent it from entering the subsequent treatment system. The waste liquid enters the solid-liquid separator 53 through a separation pipeline, and uses centrifugal separation or screen filtration technology to remove suspended particles and sediments. The preliminarily purified waste liquid enters the chemical precipitation device 54, which includes a sedimentation tank, a dosing device and a stirring device. The dosing device adds a precipitant such as lime milk to the sedimentation tank through a conveying pipe to neutralize the acidic components in the waste liquid and precipitate metal ions. The stirring device drives the stirring blades through a motor to ensure that the precipitant and the waste liquid are evenly mixed. Evenly mix to accelerate the reaction efficiency. The reaction products in the sedimentation tank are discharged through the regular mud discharge port. The purified acid liquid enters the reflux pipe 55 through the outlet. The purified acid liquid returns to the multi-channel acid liquid circulation system 2 through the reflux pipe 55 and is directly connected to the inlet of the main circulation pump 22 for recycling. The real-time separation and regeneration process ensures the temperature concentration of the acid liquid, reduces the loss of the acid liquid and the discharge of the waste liquid, and realizes green and environmentally friendly production. If the waste liquid has a complex composition or contains a high concentration of metal ions, the chemical precipitation device 54 will adjust the dosage through the control system and start the standby electrolytic recovery equipment to further separate the heavy metal ions in the waste liquid to prevent pollution. While improving the pickling effect, it reduces energy consumption and environmental pollution, achieving the goal of efficient and clean industrial production.

[0029] See also Figure 1 , an embodiment provided by the present invention: a gantry type pre-treatment pickling production line for strip steel production, the strip steel surface intelligent detection system 6 comprises an industrial camera 61 and a laser scanner 62, the industrial camera 61 is fixedly mounted on a detection bracket, the laser scanner 62 is fixed on a gantry frame through a connecting arm, and the industrial camera 61 and the laser scanner 62 are connected to a data processor 63 through a signal line; The energy-saving air drying device 7 includes a hot air circulation duct 71 and an infrared heating module 72. One end of the hot air circulation duct 71 is connected to the outlet of the pickling tank 1, and the other end is connected to the waste heat recovery device through a circulating fan. The infrared heating module 72 is installed on the top of the energy-saving air drying device 7 and is integrated with the temperature control system through an electric control module. The hot air circulation duct 71 of the energy-saving air drying device 7 adopts a double-layer insulation structure, and a guide vane is arranged inside to evenly distribute the hot air flow rate. The infrared heating module 72 adopts a wavelength-adjustable infrared radiation element to meet the drying requirements of different strip steel surfaces. The industrial camera 61 and the laser scanner 62 in the strip steel surface intelligent detection system 6 are connected to the detection bracket through an adjustable mounting arm. The detection bracket is fixed to the gantry frame by bolts. The height and angle of the detection bracket are adjustable to meet the surface detection requirements of strip steels of different specifications. Further, the industrial camera 61 and the laser scanner 62 are uniformly controlled by the data processor 63, and are automatically initialized and calibrated when the production line is started. The data processor 63 is connected to the main controller to automatically synchronize the speed and position data of the strip to ensure the real-time nature of the detection process. After the strip is transported from the outlet of the pickling tank 1 to the detection area, the industrial camera 61 performs high-resolution image acquisition on its surface. At the same time, the laser scanner 62 scans the surface profile of the strip through a laser beam to detect surface micro-defects, pits and oxidation residues. The industrial camera 61 records the color, texture and surface uniformity of the strip through optical imaging. The laser scanner 62 captures the height information of the strip surface and generates a three-dimensional surface profile map. The data processor 63 performs real-time analysis on the acquired images and scanned data, and uses a preset defect recognition algorithm to detect scratches, cracks and other defects on the strip surface. The data processor 63 determines the defect type, location and severity through a feature matching algorithm, and generates a defect report to transmit to the main controller. The height and angle of the detection bracket can be adjusted manually or automatically according to the strip specifications to ensure the optimal detection range. The energy-saving air drying device 7 is started by the main controller when the strip enters, and the circulating fan in the hot air circulation duct 71 starts to run to transport the hot air to the drying area. The infrared heating module 72 is started and the wavelength of the infrared radiation element is adjusted according to the drying temperature preset by the temperature control system to adapt to the strip material and surface drying requirements. The hot air circulation duct 71 adopts a double-layer insulation structure, and the internal guide blades evenly distribute the hot air flow rate to the entire drying area. The energy-saving air drying device 7 collects the waste heat from the pickling tank 1 and mixes it with the fresh hot air for recycling, which significantly reduces energy consumption; the infrared heating module 72 heats the surface of the strip through the wavelength-adjustable infrared radiation element bracket to increase the drying speed. The infrared heating and hot air circulation are used in combination to avoid deformation caused by excessive surface drying and accelerate moisture evaporation. The temperature control system monitors the temperature of the drying area in real time, and adjusts the output power of the infrared heating module 72 and the circulating fan through the electronic control module to ensure that the temperature is evenly distributed and meets the process requirements. When abnormal temperature or equipment failure is detected, the system automatically stops heating and issues an alarm prompt; It improves the quality inspection capability of strip surface treatment and realizes efficient and energy-saving drying effect. It has excellent overall performance and high industrial practical value.

[0030] Working principle: the strip enters the pickling tank 1 through the unwinding roller 32, and the acid in the pickling tank 1 is sprayed through the multi-channel acid circulation system 2 to quickly remove the oxides and rust on the surface of the strip. The pickling tank 1 is equipped with a temperature control heating and cooling device to ensure that the temperature of the pickling solution is appropriate and effectively maintain the pickling efficiency; After pickling, the strip enters the strip surface intelligent detection system 6. The industrial camera 61 and the laser scanner 62 scan the strip surface in real time to detect whether there are defects or residues on the surface. Through the data processing system, the detection information is transmitted to the main controller to guide the subsequent process. Then, the strip passes through the energy-saving air drying device 7. The hot air is combined with the infrared heating module 72 to effectively remove moisture from the strip surface. During the entire pickling process, the pickling liquid is discharged through the waste liquid outlet 51 and enters the waste liquid real-time separation and regeneration system 5. The waste liquid passes through the solid-liquid separator 53 to remove solid impurities, and then enters the chemical precipitation device 54 to purify the acid liquid through neutralization and precipitation reactions, and finally flows back to the pickling system to ensure the recycling of the pickling liquid, thereby realizing green production and effective recovery of waste liquid.

[0031] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A gantry type pre-treatment pickling production line for strip steel production, comprising a pickling tank 1, a multi-channel acid liquid circulation system 2, an adaptive tension control system 3, a modular heating and cooling device 4, a waste liquid real-time separation and regeneration system 5, a strip steel surface intelligent detection system 6 and an energy-saving air drying device 7, characterized in that: The pickling tank 1 is fixedly arranged in the middle of the gantry frame structure, and a movable partition 11 is arranged in the pickling tank 1. The movable partition 11 is slidably connected to the pickling tank 1 body through a partition adjustment device 12. The partition adjustment device 12 includes a servo motor 121 and a lead screw slide 122. The output shaft of the servo motor 121 is fixedly connected to the lead screw slide 122 through a coupling, and the movable partition 11 is slidably installed on the lead screw slide 122. The multi-channel acid liquid circulation system 2 is connected to the pickling tank 1, adaptive tension control systems 3 are installed at both ends of the gantry frame, the modular heating and cooling device 4 is integrated with the pickling tank 1, the waste liquid real-time separation and regeneration system 5 is connected to the waste liquid outlet 51 at the bottom of the pickling tank 1, and the strip surface intelligent detection system 6 is arranged between the outlet of the pickling tank 1 and the inlet of the energy-saving air drying device 7.

2. A gantry type pre-treatment pickling production line for strip steel production according to claim 1, characterized in that: The acid in the multi-channel acid circulation system 2 is connected to the main circulation pump 22 through the circulation pipe 21. The outlet of the main circulation pump 22 is divided into multiple channels, which are respectively connected to the branch pipes 23. The branch pipes 23 are installed on the inner wall of the pickling tank 1 through the nozzle assembly 24.

3. The gantry type pre-treatment pickling production line for strip steel production according to claim 1, characterized in that: The adaptive tension control system 3 includes a traction roller 31 and a reel 32, which are respectively mounted on the gantry frames at both ends of the pickling tank 1 through rotating shafts. The traction roller 31 is connected to a servo motor drive system 33, and a tension sensor 34 is mounted on the rotating shaft of the reel 32, which is connected to the controller through a signal line.

4. The gantry type pre-treatment pickling production line for strip steel production according to claim 1, characterized in that: The heating device in the modular heating and cooling device 4 includes an electric heating tube 41 arranged at the bottom of the pickling tank 1, and the cooling device in the modular heating and cooling device 4 includes a cooling spiral tube 42 installed on the outer wall of the pickling tank 1, and the cooling spiral tube 42 is connected to the coolant delivery system through a quick interface, and the electric heating tube 41 is connected to the temperature controller 43 through a temperature control circuit.

5. The gantry type pre-treatment pickling production line for strip steel production according to claim 1, characterized in that: The waste liquid outlet 51 in the waste liquid real-time separation and regeneration system 5 is connected to the liquid collecting tank 52 through a pipeline, the liquid collecting tank 52 is connected to the solid-liquid separator 53 and the chemical precipitation device 54 through a separation pipeline, and the outlet of the chemical precipitation device 54 is connected to the inlet of the main circulation pump 22 of the multi-channel acid liquid circulation system 2 through a reflux pipeline 55.

6. The gantry type pre-treatment pickling production line for strip steel production according to claim 1, characterized in that: The strip surface intelligent detection system 6 includes an industrial camera 61 and a laser scanner 62. The industrial camera 61 is fixedly mounted on a detection bracket, and the laser scanner 62 is fixed on a gantry frame via a connecting arm. The industrial camera 61 and the laser scanner 62 are connected to a data processor 63 via a signal line.

7. The gantry type pre-treatment pickling production line for strip steel production according to claim 1, characterized in that: The energy-saving air drying device 7 includes a hot air circulation duct 71 and an infrared heating module 72. One end of the hot air circulation duct 71 is connected to the outlet of the pickling tank 1, and the other end is connected to the waste heat recovery device through a circulating fan. The infrared heating module 72 is installed on the top of the energy-saving air drying device 7 and is integrated with the temperature control system through an electronic control module.

8. The gantry type pre-treatment pickling production line for strip steel production according to claim 1, characterized in that: The servo motor 121 is provided with a position detection sensor at the sliding connection between the servo motor 121 and the movable partition 11 through a coupling, so as to monitor the real-time position of the movable partition 11. The position detection sensor is connected to the main controller through a signal line. The nozzle assembly 24 is arranged at multiple angles, and the direction of the nozzle outlet is at an angle of 20° to 40° with the surface of the strip. The nozzle is connected to the diversion pipe 23 through a rotating joint to realize dynamic adjustment of the injection direction.

9. A gantry type pre-treatment pickling production line for strip steel production according to claim 4, characterized in that: The surface of the electric heating tube 41 of the heating device is coated with an anti-corrosion coating, the cooling spiral tube 42 is made of polyvinylidene fluoride material, the coolant delivery system includes a coolant pump and a coolant storage tank, the coolant pump is connected to the cooling spiral tube 42 through the inlet and outlet liquid pipes, the chemical precipitation device 54 in the waste liquid real-time separation and regeneration system 5 includes a sedimentation tank, a dosing device and a stirring device, the dosing device is connected to the sedimentation tank through a delivery pipe, the stirring device is installed at the bottom of the sedimentation tank, and is driven by a motor to achieve uniform mixing of the precipitate.

10. The gantry type pre-treatment pickling production line for strip steel production according to claim 1, characterized in that: The hot air circulation duct 71 of the energy-saving air drying device 7 adopts a double-layer insulation structure, and guide blades are arranged inside to evenly distribute the hot air flow rate. The infrared heating module 72 adopts a wavelength-adjustable infrared radiation element to meet the different strip surface drying requirements. The industrial camera 61 and the laser scanner 62 in the strip surface intelligent detection system 6 are connected to the detection bracket through an adjustable mounting arm. The detection bracket is fixed to the gantry frame by bolts. The height and angle of the detection bracket are adjustable to meet the surface detection requirements of strips of different specifications.

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