Furnace top structure of oxygen-enriched side-blown furnace

Abstract

The invention belongs to the technical field of lead smelting, and particularly relates to a furnace top structure of an oxygen-enriched side-blown furnace. The furnace top structure comprises a furnace body, a smoke hood is arranged at the top of the furnace body, a smoke exhaust port and a feeding device are arranged on the smoke hood, the smoke exhaust port is connected with a pressure swing adsorption device through a pipeline, the feeding device comprises a charging barrel, the charging barrel is provided with a feeding port and a discharging port, and the charging barrel is fixed to the smoke hood; the discharging valve is used for opening and closing the discharging opening; and the sealing element is used for opening and closing the feeding hole. The discharging valve is arranged on the discharging port of the charging barrel, the sealing piece is arranged on the feeding port of the charging barrel, the feeding port of the charging barrel can be sealed through the sealing piece in the process that materials are conveyed to the furnace body, the volume of air entering the furnace body from the charging barrel is small, and the influence on the content of carbon monoxide in tail gas is greatly reduced; the problem of load increase of the pressure swing adsorption device can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of lead smelting, and in particular relates to a furnace top structure of an oxygen-enriched side-blown furnace. Background Art

[0002] The oxygen-enriched side-blown furnace is an important equipment in the lead smelting process. It uses oxygen-enriched air for smelting and has many advantages over traditional lead smelting equipment.

[0003] When using an oxygen-enriched side-blown furnace for lead smelting, the ratio of carbon monoxide to carbon dioxide in the flue gas at the top of the furnace is required to be controlled at one to one as much as possible to ensure appropriate reduction strength; since the reaction of carbon monoxide and oxygen is an exothermic reaction, a large amount of carbon monoxide remaining in the tail gas will make a large amount of heat energy unusable. In order to make full use of the carbon monoxide in the tail gas, the existing technology usually uses pressure swing adsorption to recover the carbon monoxide in the exhaust gas.

[0004] When using pressure swing adsorption to recover carbon monoxide, the higher the concentration of carbon monoxide, the smaller the load of the pressure swing adsorption device. In the prior art, in order to ensure continuous production and production efficiency, continuous feeding is usually adopted. During the continuous feeding process, a large amount of air will be brought into the oxygen-enriched side-blowing furnace, resulting in a decrease in the carbon monoxide content, which increases the load of the pressure swing adsorption device. When the load increases, the purity of the product gas of the pressure swing adsorption device will decrease, the performance of the adsorbent will decrease, the equipment will wear faster, the energy consumption will increase, the operating cost will increase, and the stability of the system will be affected. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an oxygen-enriched side-blowing furnace roof structure, which can avoid continuous introduction of air into the oxygen-enriched side-blowing furnace during the production process and improve the problem of increased load of the pressure swing adsorption device.

[0006] The technical solution proposed by the present invention is: An oxygen-enriched side-blown furnace roof structure comprises a furnace body, a fume hood is arranged on the top of the furnace body, a fume exhaust port and a feeding device are arranged on the fume hood, the fume exhaust port is connected to a pressure swing adsorption device through a pipeline, and the feeding device comprises: A barrel, the barrel having a feed inlet and a discharge outlet, and the barrel is fixed on the fume hood; Discharge valve: the discharge valve is used to open and close the discharge port; Seals, which are used to open and close the feed port, Optionally, the feeding device further comprises: The ventilation component is connected to the barrel and is used to replace the gas in the barrel.

[0007] Optionally, the ventilation assembly includes: An air inlet pipe, one end of which is connected to the barrel, and the other end of which is connected to a replacement air source; Exhaust pipe: the exhaust pipe is connected to the barrel.

[0008] Optionally, the cross-sectional area of ​​the discharge port increases gradually from the barrel to the fume hood, and the discharge valve reciprocates along its axial direction to open and close the discharge port, and the outer wall of the discharge valve fits with the discharge port.

[0009] Optionally, there is a step surface between the discharge port and the inner wall of the barrel, and the feeding device further includes a backflush assembly, which includes: The jet hole has one end located on the step surface and the other end connected to the air inlet pipe.

[0010] Optionally, the backflush kit also includes: The accommodating chamber is located inside the barrel wall, the end of the jet hole away from the step surface is connected to the accommodating chamber, and a connecting port is also provided on the outer wall of the barrel, the connecting port is connected to the accommodating chamber, and the connecting port is connected to the air inlet pipe through a pipeline.

[0011] Optionally, the seal is detachably connected to the barrel.

[0012] Optionally, an automatic feeding device is also included, and the automatic feeding device includes: A swivel base, which is arranged on the fume hood and can rotate around its axis; A first support, the first support is integrally formed with the rotary base through a plate; A second support, the second support is integrally formed with the rotary base through a plate; A cap grabbing and placing robot, the cap grabbing and placing robot is arranged on the first support; A material replenishing barrel is arranged on the second support.

[0013] Optionally, the feeding barrel is further provided with: a discharge pipe, which is connected to the discharge end of the feeding barrel and is elastically retractable; The second support is provided with a discharging manipulator, which drives the discharging pipe to extend and retract.

[0014] Optionally, the number of the barrels is four, and the distances between the four barrels and the axis of the fume hood are the same, two of the barrels are symmetrically arranged on the fume hood along the x direction, and the remaining two are symmetrically arranged on the fume hood along the y direction.

[0015] Optionally, there are two first supports, which are symmetrically arranged on both sides of the rotating base; there are two second supports, which are symmetrically arranged on both sides of the rotating base; and the angle between the first support and the second support is ninety degrees.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention arranges a discharge valve on the discharge port of the barrel and a seal on the feed port of the barrel, so that the feed port of the barrel can be closed by the seal during the material conveying process to the furnace body. The volume of air entering the furnace body from the barrel is small, the impact on the carbon monoxide content in the exhaust gas is greatly reduced, and the problem of increased load of the pressure swing adsorption device can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0018] Figure 1 It is a working principle diagram of the present invention; Figure 2 It is a three-dimensional diagram of the barrel of the present invention; Figure 3 For the present invention Figure 2 A magnified image of area A; Figure 4 For the present invention Figure 2 sectional view of; Figure 5 A three-dimensional view of a barrel with a groove provided for the seal of the present invention; Figure 6 For the present invention Figure 5 sectional view of; Figure 7 A top view of the fume hood of the present invention; Figure 8 A three-dimensional diagram of an automatic feeding device in which a sealing member applicable to the present invention is connected to a barrel through threads; Fig. 9 For the present invention Figure 8 Bottom view of Fig.10 A three-dimensional diagram of an automatic feeding device in which a sealing member and a barrel are connected by clamping according to the present invention; Fig.11 For the present invention Fig. 9 Bottom view of Fig.12 It is a cross-sectional view of the cap grabbing and placing robot of the present invention; Fig.13 It is a stereoscopic diagram of the cam divider of the present invention.

[0019] In the figure: 1. furnace body; 11. furnace body; 12. furnace bottom; 13. first water jacket; 14. furnace cylinder; 15. bottom exhaust port; 16. secondary high temperature burner; 17. smoke hood; 18. second water jacket; 171. exhaust port; 2. automatic feeding device; 21. rotary base; 22. first support; 23. second support; 24. grab and place cover manipulator; 25. feeding barrel; 241. second linear drive device; 242. base plate; 243. rotary drive device; 244. chuck; 245. rotary joint; 246. cam divider; 251. discharge pipe; 252. discharge manipulator ; 2441, claw; 2521, third linear drive device; 2522, connecting plate; 3, feeding device; 31, barrel; 32, discharge valve; 33, sealing member; 34, ventilation assembly; 35, back-blowing assembly; 311, feed port; 312, discharge port; 313, step surface; 314, connecting port; 315, mounting seat; 316, support plate; 317, guide surface; 321, first linear drive device; 331, mounting hole; 332, mounting ring; 333, limit plate; 341, air inlet pipe; 342, exhaust pipe; 351, jet hole; 352, accommodating chamber. DETAILED DESCRIPTION

[0020] 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.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] Example 1 Please refer to Figure 1The oxygen-enriched side-blown furnace of the present invention comprises a furnace body 1, which is arranged in a vertical direction. The furnace body 1 is a hollow structure with openings at both ends. The furnace body 1 comprises a furnace body 11 and a furnace bottom 12 which are connected in sequence from top to bottom. A smoke hood 17 is arranged on the top of the furnace body 1, and a smoke exhaust port 171 is arranged on the smoke hood 17. A furnace cylinder 14 is connected to the lower end of the furnace bottom 12. A first water jacket 13 is arranged on the outer wall of the furnace body 11, and a second water jacket 18 is arranged on the outer wall of the furnace bottom 12. A bottom exhaust port 15 and a secondary high-temperature burner 16 are also arranged on the furnace bottom 12.

[0023] The furnace body 11 is cylindrical, the furnace bottom 12 is truncated cone, and the diameter of the furnace bottom 12 decreases from top to bottom; the second water jacket 18 is truncated cone and parallel to the outer wall of the furnace bottom 12; the bottom exhaust port 15 is arranged perpendicular to the outside of the furnace bottom 12, and extends into the furnace bottom 12 after passing through the second water jacket 18; the secondary high-temperature burner 16 is perpendicular to the axis of the furnace body 1, and extends into the furnace bottom 12 after passing through the second water jacket 18.

[0024] The tail gas discharged from the smoke outlet 171 is connected to the input end of the pressure swing adsorption device 4 through a pipeline, the carbon monoxide in the tail gas is enriched by the pressure swing adsorption device 4, and the carbon monoxide enriched by the pressure swing adsorption device is input to the secondary high-temperature burner 16 through a pipeline.

[0025] In this solution, the recovered carbon monoxide is injected into the furnace body 1, and the heat generated by the combustion of carbon monoxide and oxygen can be used to enhance the intensity of smelting in the furnace body 1, and can greatly save the coke consumption ratio and reduce production costs.

[0026] It should be noted that the pressure swing adsorption device is a device that uses pressure swing adsorption technology to achieve gas separation and purification. Pressure swing adsorption (PSA) technology uses the different adsorption capacities of gas components on adsorbents to achieve gas separation and purification under pressure changes. The pressure swing adsorption device and pressure swing adsorption technology of the present invention both adopt existing technologies.

[0027] As a preferred solution, the secondary high-temperature burner 16 has two air inlet interfaces, and a mixer is provided in the main pipeline of the secondary high-temperature burner 16, and the gases input from the two air inlet interfaces are mixed evenly through the mixer.

[0028] One of the air inlet interfaces of the secondary high-temperature burner 16 is connected to the output end of the pressure swing adsorption device through a pipeline, and the product gas (carbon monoxide) enriched by the pressure swing adsorption device is transported to the secondary high-temperature burner 16; the other air inlet interface of the secondary high-temperature burner 16 is connected to oxygen.

[0029] As a further preferred scheme, the distance between the secondary high temperature burner 16 and the bottom exhaust port 15 below it is 0.3 to 0.5 m (i.e., the vertical distance from the center point of the connection between the secondary high temperature burner 16 and the furnace body 1 to the center point of the connection between the bottom exhaust port 15 and the furnace body 1), and the number of the secondary high temperature burner 16 and the bottom exhaust port 15 is at least one.

[0030] Example 2 Please refer to Figure 1-13 When the pressure swing adsorption device 4 is used to collect carbon monoxide, the higher the concentration of carbon monoxide in the tail gas, the smaller the load of the pressure swing adsorption device 4. In actual production, in order to ensure production efficiency, the oxygen-enriched side-blowing furnace will adopt a continuous feeding method, and the continuous feeding method is used to continuously bring air into the furnace body 1, resulting in a decrease in the content of carbon monoxide in the tail gas.

[0031] In order to reduce the load of the pressure swing adsorption device, a feeding device 3 is provided on the basis of Example 1. The feeding device 3 has a barrel 31, which is a hollow structure with two ends open, the upper end of the barrel 31 is a feed port 311, and the lower end is a discharge port 312 (the discharge port 312 is connected to the inside of the fume hood 17), and the barrel 31 is fixed on the fume hood 17 (preferably fixed on the top of the fume hood 17); a sealing member 33 is provided on the feed port 311, and the sealing member 33 can open and close the feed port 311; a discharge valve 32 is provided on the discharge port 312, and the discharge valve 32 can open and close the discharge port 312.

[0032] The barrel 31 is preferably fixed on the top of the fume hood 17. When the barrel 31 is replenished, the discharge port 312 is closed by the discharge valve 32, the feed port 311 is opened by the seal 33, and the material is injected into the barrel 31 through the feed port 311; when the barrel 31 is charged, the feed port 311 is closed by the seal 33, the discharge port 312 is opened by the discharge valve 32, and the material enters the furnace body 1 through the discharge port 312. Since the space in the barrel 31 is limited and the seal 33 closes the feed port 311 of the barrel 31, the volume of air that can enter the furnace body 1 during injection is limited, and the change in the carbon monoxide content in the tail gas is greatly reduced (relative to the continuous feeding method), which greatly improves the problem of heavy load of the pressure swing adsorption device when the continuous feeding method is adopted.

[0033] As a preferred solution, refer to Figure 3 , Figure 4 , Figure 6 The discharge valve 32 and the discharge port 312 of the present invention are both configured to be truncated cone-shaped, and the cross-sectional area of ​​the discharge port 312 increases from top to bottom. The outer wall of the discharge valve 32 and the inner wall of the discharge port 312 fit together, and the discharge valve 32 opens or closes the discharge port 312 by moving up and down.

[0034] As a further preferred solution, the discharge valve 32 is provided with a power source, and the power source drives the discharge valve 32 to move up and down. The power source in this solution is a first linear drive device 321.

[0035] As a further preferred solution, a mounting seat 315 is further provided in the barrel 31, and a plurality of support plates 316 are provided on the outer wall of the mounting seat 315, and the other end of the support plate 316 is fixed to the inner wall of the barrel 31. The first linear drive device 321 is fixedly installed on the lower end surface of the mounting seat 315. By providing the mounting seat 315, the first linear drive device 321 can be shielded to prevent the material from directly falling on the first linear drive device 321 when the material enters the barrel 31, causing the first linear drive device 321 to be misplaced.

[0036] As a further preferred solution, refer to Figure 3 , Figure 4 , Figure 6 The barrel 31 has a guide surface 317 inside, and the cross-sectional area of ​​the guide surface 317 decreases from top to bottom. The guide surface 317 guides the material to move toward the discharge port 312; a step surface 313 is formed between the guide surface 317 and the discharge port 312, and the backflush assembly 35 is used to purge the material between the discharge valve 32 and the discharge port 312 to prevent the material from being stuck between the discharge valve 32 and the discharge port 312, resulting in the discharge port 312 being unable to be closed.

[0037] It should be noted that the upper end surface of the discharge valve 32 is an arc surface or a conical surface, and the distance from the upper end surface of the discharge valve 32 to the horizontal plane decreases from the middle of the discharge valve 32 to the outside. Through this design, the material can be guided to move to the outer wall of the discharge valve 32.

[0038] As a further preferred solution, the backblowing assembly 35 includes a jet hole 351, one end of which is arranged on the step surface 313, the jet hole 351 is arranged parallel to the discharge port 312, and the jet hole 351 is directed toward the area between the discharge valve 32 and the discharge port 312, and the other end of the jet hole 351 extends outside the discharge barrel 31; the gas ejected through the jet hole 351 can, on the one hand, clean the material between the discharge valve 32 and the discharge port 312, and on the other hand, it can also assist in unloading.

[0039] As a further preferred solution, one end of the jet hole 351 away from the step surface 313 is connected to the air inlet pipe 341 through a pipe. In this way, when the backflush operation is performed, the carbon monoxide content in the gas ejected through the jet hole 351 is not lower than the carbon monoxide content in the exhaust gas, so the load of the pressure swing adsorption device will not be increased.

[0040] As a further preferred solution, the backblowing assembly 35 also includes a accommodating chamber 352, which is arranged in the wall of the barrel 31, and the upper end of the jet hole 351 is connected to the accommodating chamber 352. The outer wall of the barrel 31 also has a connecting port 314, which extends into the wall of the barrel 31 and is connected to the accommodating chamber 352. The connecting port 314 can be connected to the air inlet pipe 341 through a pipeline.

[0041] It should be noted that the number of the air injection holes 351 can be multiple.

[0042] As a preferred solution, refer to Figure 1 A ventilation component 34 is also provided, through which the air remaining in the barrel 31 is replaced, so that the carbon monoxide content in the gas in the barrel 31 is not lower than the carbon monoxide content in the exhaust gas, ensuring that the carbon monoxide content in the exhaust gas will not decrease during the feeding process, and will not increase the load of the pressure swing adsorption device.

[0043] The ventilation assembly 34 includes an air inlet pipe 341 and an air exhaust pipe 342. One end of the air inlet pipe 341 is connected to the barrel 31, and the other end of the air inlet pipe 341 is connected to a replacement gas source. The gas input into the barrel 31 by the replacement gas source is used to replace the air in the barrel 31. Specifically, the gas source of the replacement gas source can be any one of the gas in the fume hood 17, the product gas of the pressure swing adsorption device, the exhaust gas in the smoke exhaust port 171, or the carbon monoxide stored in the carbon monoxide storage tank.

[0044] As a further preferred solution, when the gas source of the replacement gas source is the gas in the fume hood 17 or the tail gas in the smoke outlet 171, the carbon monoxide content in the replacement gas source is approximately equal to the carbon monoxide content in the tail gas (the reason is that some air may remain in the barrel 31, for example, a small amount of air may remain in the gap between the materials; the small amount of remaining air has a negligible change in the load of the pressure swing adsorption device). However, when the gas source of the replacement gas source is the gas in the fume hood 17 or the gas in the smoke outlet 171, the gas temperature of the replacement gas source is relatively high, and the material in the barrel 31 can be preheated.

[0045] As a further preferred scheme, when the gas source of the replacement gas source is the product gas of the pressure swing adsorption device 4 or the carbon monoxide stored in the carbon monoxide storage tank, the carbon monoxide content in the replacement gas source is higher than the carbon monoxide content in the exhaust gas. After the replacement, the carbon monoxide content in the barrel 31 is higher than the carbon monoxide content in the exhaust gas.

[0046] As a further preferred solution, the gas of the replacement gas source is increased and continuously fed to maintain a slight positive pressure in the barrel 31. When there is a leak in the barrel 31, since the continuously input gas pressure is greater than the pressure of the external environment, the outside air cannot enter the barrel 31, thereby avoiding the problem of air entering the fume hood 17 and causing the carbon monoxide content in the exhaust gas to decrease.

[0047] It should be noted that a carbon monoxide sensor may be provided in the barrel 31 , and the carbon monoxide content in the barrel 31 may be detected by the carbon monoxide sensor.

[0048] It should be noted that the connection position between the air inlet pipe 341 and the exhaust pipe 342 and the barrel 31 is located above the outer wall of the barrel 31 to avoid material blocking the air inlet pipe 341 or the exhaust pipe 342. Specifically, a level meter can be set in the barrel 31 to ensure that the material in the barrel 31 does not block the air inlet pipe 341 or the exhaust pipe 342.

[0049] Example 3 refer to Figure 8-13 , further improved on the basis of Example 2, by setting up an automatic feeding device 2 to realize the automation of feeding the barrel 31.

[0050] To realize automatic feeding, the seal 33 must first be able to be opened and closed as needed. In this solution, in order to improve the efficiency of feeding, the seal 33 is detachably connected to the barrel 31. When feeding, the seal 33 is removed and the feed inlet 311 is fully opened. After the feeding is completed, the seal 33 is installed on the barrel 31 to seal the feed inlet 311 of the barrel 31.

[0051] Specifically, the sealing member 33 is a sealing cover with an opening at one end. The inner wall of the opening cooperates with the outer wall of the barrel 31 to realize a detachable connection between the sealing cover and the barrel 31. The sealing cover can be connected to the barrel 31 via threads; obviously, the sealing cover can also be connected to the barrel 31 by a snap-on method.

[0052] It should be noted that the detachable connection can also be achieved by the outer wall of the opening cooperating with the inner wall of the barrel 31 .

[0053] It should be noted that, in order to improve the sealing effect between the sealing cover and the barrel 31, a sealing gasket may be provided inside the sealing cover.

[0054] The automatic feeding device 2 has a rotating base 21 that can rotate around its axis, and a first support 22 and a second support 23 are respectively connected to the outer wall of the rotating base 21, wherein a cover grabbing and placing robot 24 is provided on the first support 22, and the sealing member 33 is disassembled and assembled by the cover grabbing and placing robot 24; a feeding barrel 25 is provided on the second support 23, and the barrel 31 is fed with feeding by the feeding barrel 25.

[0055] The lower end of the replenishing barrel 25 is connected to a discharge pipe 251, and a discharge robot 252 is also provided on the second support 23. The discharge robot 252 drives the discharge pipe 251 to contract or open to adjust the distance from the lower end of the discharge pipe 251 to the lower end surface of the second support 23, so that the discharge pipe 251 can be inserted into or removed from the barrel 31 to prevent particles in the material from floating in the environment during the replenishing process.

[0056] It should be noted that the discharging manipulator 252 includes a third linear drive device 2521 and a connecting plate 2522. In this solution, a pair of third linear drives 2521 are arranged at the bottom of the second support 23, and the output end of the third linear drive device 2521 is fixedly connected to the connecting plate 2522. The upper end of the discharging pipe 251 is connected to the feeding barrel 25, and the lower end of the discharging pipe 251 is fixed to the connecting plate 2522. The discharging pipe 251 adopts a retractable pipe, such as a bellows.

[0057] Specifically, by rotating the rotary base 21, the grabbing and placing cover robot 24 corresponds to the barrel 31 up and down, and the sealing cover is removed by the grabbing and placing cover robot 24; further, by rotating the rotary base 21, the replenishing barrel 25 corresponds to the barrel 31 up and down, and the discharging robot 252 drives the discharging pipe 251 to be inserted into the replenishing barrel 25 to realize replenishment; further, by rotating the rotary base 21, the grabbing and placing cover robot 24 corresponds to the barrel 31 up and down, and the sealing cover is connected to the barrel 31 by the grabbing and placing cover robot 24 to seal the barrel 31.

[0058] It should be noted that the angle of each rotation of the swivel base 21 needs to be precisely positioned, which is achieved in this solution by using a cam divider. Specifically, the cam divider is installed on the smoke hood 17, and the rotation center of the working end of the cam divider overlaps with the axis of the smoke hood 17, and the swivel base 21 is coaxially connected to the working end of the cam divider.

[0059] It should be noted that the reference Figure 8 , Fig. 9 When the sealing cover is connected to the barrel 31 by threads, the cover grabbing and placing robot 24 includes a second linear drive device 241, a base plate 242, a rotation drive device 243, a chuck 244, and a rotary joint 245. The second linear drive device 241 is fixed to the lower end surface of the first support 22, the base plate 242 is fixed to the output end of the second linear drive device 241, the fixed end of the rotary joint 245 is fixed to the lower end surface of the base plate 242, the chuck 244 is fixed to the rotating end of the rotary joint 245, the rotation drive device 243 is fixed to the base plate 242, and the rotation drive device 243 transmits power to the rotating end of the rotary joint 245 through the transmission structure.

[0060] When removing the sealing cover, the power medium pushes the second linear drive device 241 to move, so that the chuck 244 corresponds to the sealing cover, the power medium is input to the chuck 244 through the adapter, the sealing cover is clamped by the chuck 244, and the rotary drive device 243 drives the chuck 244 to rotate, and the sealing cover is separated from the barrel 31 through the linkage between the second linear drive device 241 and the rotary drive device 243.

[0061] When installing the sealing cover, the power medium pushes the second linear drive device 241 to move so that the sealing cover corresponds to the barrel 31 , and the sealing cover is installed on the barrel 31 through the linkage between the second linear drive device 241 and the rotary drive device 243 .

[0062] In this solution, the transmission structure is a pulley group and a belt, one pulley of the pulley group is installed on the output end of the rotary drive device 243, and the other pulley of the pulley group is installed on the outer wall of the rotating end of the rotary joint 245, and the belt is sleeved on the outer walls of a pair of pulleys.

[0063] When the sealing cover is engaged with the barrel 31, the cover grabbing and placing robot 24 includes a second linear drive device 241, a base plate 242 and a chuck 244. The second linear drive device 241 is fixed to the lower end surface of the first support 22, the base plate 242 is fixed to the output end of the second linear drive device 241, and the chuck 244 is fixed to the lower end surface of the base plate 242.

[0064] When removing the sealing cover, the power medium pushes the second linear drive device 241 to move, so that the chuck 244 corresponds to the sealing cover, and the power medium is input to the chuck 244 through the rotating joint 245, and the sealing cover is clamped by the chuck 244, and the sealing cover is separated from the barrel 31 by the second linear drive device 241.

[0065] When installing the sealing cover, the power medium pushes the second linear drive device 241 to move, so that the sealing cover corresponds to the barrel 31 , and the sealing cover is clamped on the barrel 31 by the second linear drive device 241 continuously moving downward.

[0066] As a preferred solution, refer to Figure 5 , Figure 6 A mounting hole 331 is provided on the upper end surface of the sealing cover, and a mounting ring 332 is provided on the top of the mounting hole 331. When in use, the clamping claw of the chuck 244 is inserted into the mounting ring 332, and the clamping claw 2441 of the chuck 244 is opened by the action of the power medium and fits with the inner wall of the mounting hole 331. The mounting ring 332 can limit the position of the clamping claw 2441 in the vertical direction, and after the sealing cover is grasped, the mounting ring 332 can be prevented from falling.

[0067] When the sealing cover is threadedly connected to the barrel 31, a limit plate 333 can be set in the cavity surrounded by the mounting ring 332 and the mounting hole 331. The limit plate 333 is set in the vertical direction and is spaced apart along the circumferential direction. The sealing cover can be driven to rotate by the cooperation between the limit plate 333 and the claw 2441, and there is a gap between the upper and lower ends of the claw 2441 and the mounting ring 332 and the sealing cover; during the installation and removal of the sealing cover, the second linear drive device 241 does not need to be linked with the rotation drive device 243, that is, the second linear drive device 241 does not need to use a servo control system (the servo control system accurately controls the rising or falling speed of the second linear drive device 241 to cooperate with the rotation drive device 243 to realize the installation and removal of the sealing cover), saving the cost of the device.

[0068] It should be noted that the reference Fig.12 One end of the rotary joint 245 is a fixed end, and the other end is a rotating end. The power medium is input through the fixed end and output to the chuck 244 through the rotating end.

[0069] It should be noted that the above-mentioned power medium can be gas or liquid.

[0070] As a further preferred solution, refer to Figure 7 There are four barrels 31, and the four barrels 31 are arranged at intervals along the same circumferential direction, wherein two barrels 31 are symmetrically arranged along the x direction (the center of symmetry is the midpoint of the fume hood 17), and the other two barrels 31 are symmetrically arranged along the y direction (the center of symmetry is the midpoint of the fume hood 17); accordingly, there are two first supports 22, and the two first supports 22 are symmetrically arranged with the rotary base 21 as the center; there are two second supports 23, and the two second supports 23 are symmetrically arranged with the rotary base 21 as the center; the angles between the first support 22 and the second supports 23 on both sides are both 90 degrees. In this way, the two cover grabbing and placing manipulators 24 and the two feeding barrels 25 can be opposite to the four barrels 31 up and down.

[0071] When in use, the seals 33 of the two barrels 31 in the x direction are removed by two grab-and-place cover manipulators 24; then the rotary base 21 rotates 90 degrees, and the two barrels 31 in the x direction are refilled by two refilling barrels 25. After the refilling is completed, the rotary base 21 continues to rotate 90 degrees to seal the two barrels 31. When refilling is performed by this method, the rotary base 21 rotates a small angle each time, and there is no redundant travel.

[0072] It should be noted that continuous production can be achieved by adopting this method, that is, material is injected into the furnace body 1 through the two barrels 31 in the x direction; at the same time, the two barrels 31 in the y direction are replenished through the automatic replenishing device 2. By synchronously injecting or replenishing material with two groups of barrels 31, continuous production can be achieved without introducing air into the furnace body 1.

[0073] It should be noted that the number of barrels 31 may be more than two pairs.

[0074] It should be noted that the first linear drive device 321, the second linear drive device 241 and the third linear drive device 2521 can specifically use any one of electric cylinders, air cylinders and hydraulic cylinders, preferably air cylinders; the rotary drive device 243 can use a rotary cylinder or a motor, preferably a rotary cylinder.

[0075] Example 4 The inventor is in Hunan Leiyang Yanxin Company's 5.6m 2 On the basis of the oxygen-enriched side-blown furnace, the furnace top structure of the present invention is installed, wherein the barrel diameter is 1.2m and the smoke exhaust port diameter is 1.2m; the tail gas is input into the pressure swing adsorption device for enrichment, and the enriched carbon monoxide is input into the secondary high-temperature burner, and the secondary high-temperature nozzle is set at a position 0.5m away from the bottom exhaust port, and a high-temperature flame of about 1400°C is sprayed into the coke on the upper layer of the furnace body through the secondary high-temperature burner.

[0076] Through statistics and calculations, the coke saving rate of this solution is greater than 33%, the furnace area capacity increases by about 35%, and the processing cost per ton of material is reduced by about 35%, which has huge environmental benefits and good economic benefits.

[0077] Comparative Example 1 The same scheme as in Example 5 is adopted, except that the secondary high temperature burner is set at a position 1.2m away from the bottom exhaust port. According to statistics and calculations, the smelting intensity is increased by about 12%, and the coke consumption is saved by about 15%, which is worse than that in Example 3.

[0078] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oxygen-enriched side-blown furnace roof structure, comprising a furnace body (1), a fume hood (17) being arranged on the top of the furnace body (1), a fume exhaust port (171) and a feeding device (3) being arranged on the fume hood (17), the fume exhaust port (171) being connected to a pressure swing adsorption device through a pipeline, and characterized in that: The feeding device (3) comprises: A barrel (31), the barrel (31) having a feed port (311) and a discharge port (312), and the barrel (31) is fixed on the fume hood (17); A discharge valve (32), the discharge valve (32) is used to open and close the discharge port (312); A sealing member (33) is used to open and close the feed port (311).

2. The oxygen-enriched side-blown furnace roof structure according to claim 1 is characterized in that: The feeding device (3) further comprises: A ventilation assembly (34) is connected to the barrel (31) and is used to replace the gas in the barrel (31).

3. The oxygen-enriched side-blown furnace roof structure according to claim 2 is characterized in that: The ventilation assembly (34) comprises: An air inlet pipe (341), one end of the air inlet pipe (341) is in communication with the barrel (31), and the other end of the air inlet pipe (341) is connected to a replacement air source; An exhaust pipe (342) is connected to the barrel (31).

4. The oxygen-enriched side-blown furnace roof structure according to claim 3 is characterized in that: The cross-sectional area of ​​the discharge port (312) increases gradually along the barrel (31) toward the fume hood (17), and the discharge valve (32) reciprocates along its axial direction to open and close the discharge port (312), and the outer wall of the discharge valve (32) fits with the discharge port (312).

5. The oxygen-enriched side-blown furnace roof structure according to claim 4 is characterized in that: A step surface (313) is provided between the discharge port (312) and the inner wall of the barrel (31). The feeding device (3) further comprises a backflush assembly (35). The backflush assembly (35) comprises: An air jet hole (351), one end of the air jet hole (351) is located on the step surface (313), and the other end of the air jet hole (351) is communicated with the air inlet pipe (341).

6. The oxygen-enriched side-blown furnace roof structure according to claim 5, characterized in that: The backflush assembly (35) further comprises: The accommodating chamber (352) is located in the barrel wall of the barrel (31); one end of the air injection hole (351) away from the step surface (313) is in communication with the accommodating chamber (352); a connecting port (314) is also provided on the outer wall of the barrel (31); the connecting port (314) is in communication with the accommodating chamber (352); and the connecting port (314) is connected to the air inlet pipe (341) via a pipeline.

7. The oxygen-enriched side-blown furnace roof structure according to claim 1, characterized in that: The sealing member (33) is detachably connected to the barrel (31).

8. The oxygen-enriched side-blown furnace roof structure according to claim 7, characterized in that: The invention also comprises an automatic feeding device (2), wherein the automatic feeding device (2) comprises: A swivel base (21), the swivel base (21) being arranged on the fume hood (17), and the swivel base (21) being rotatable around its axis; A first support (22), the first support (22) being integrally formed with the rotary base (21) through a plate; A second support (23), the second support (23) being integrally formed with the rotary base (21) through a plate; A cover grabbing and placing robot (24), wherein the cover grabbing and placing robot (24) is arranged on the first support (22); A material replenishing barrel (25), wherein the material replenishing barrel (25) is arranged on the second support (23).

9. The oxygen-enriched side-blown furnace roof structure according to claim 8, characterized in that: The feeding barrel (25) is also provided with: a discharge pipe (251), which is connected to the discharge end of the feeding barrel (25), and the discharge pipe (251) is elastically retractable; The second support (23) is provided with a discharging manipulator (252), which drives the discharging pipe (251) to extend and retract.

10. The oxygen-enriched side-blown furnace roof structure according to claim 9, characterized in that: The number of the barrels (31) is four, and the distances between the four barrels (31) and the axis of the fume hood (17) are the same. Two of the barrels are symmetrically arranged on the fume hood (17) along the x-direction, and the remaining two are symmetrically arranged on the fume hood (17) along the y-direction. There are two first supports (22) and they are symmetrically arranged on both sides of the rotating base (21); there are two second supports (23) and they are symmetrically arranged on both sides of the rotating base (21); and the angle between the first support (22) and the second support (23) is ninety degrees.

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