CN118582971B - Oxygen-enriched side-blown converter - Google Patents

Abstract

The present invention relates to the technical field of side-blowing furnaces, and in particular to an oxygen-enriched side-blowing furnace, comprising a furnace body, a heat exchanger, and a waste heat recovery device; the waste heat recovery device comprises a box body, in which a plurality of mutually parallel heat exchange tubes are arranged, the top ends of the heat exchange tubes are connected to the same upper communicating vessel, and the bottom ends of the heat exchange tubes are connected to the same lower communicating vessel, the lower communicating vessel is used to connect a water supply device, and the upper communicating vessel and the heat exchanger are connected through a steam output pipe; a heat exchange cylinder is coaxially sleeved on each heat exchange tube, the heat exchange cylinder is rotatably connected to the heat exchange tube, a sealing ring is fixed at each end of the heat exchange cylinder, and a scraper in contact with the heat exchange cylinder is arranged on one side of each heat exchange cylinder. The present invention coaxially and rotatably mounts a heat exchange cylinder on the heat exchange tube, and the rotating heat exchange cylinder scrapes against the corresponding scraper, so that the attachments on the surface of the heat exchange cylinder can be automatically removed, so that the surface of the heat exchange tube can always maintain a high heat exchange efficiency.

Description

An oxygen-enriched side-blowing furnace

Technical Field

The invention relates to the technical field of side-blown furnaces, and in particular to an oxygen-enriched side-blown furnace.

Background Art

The oxygen-enriched side-blowing furnace is a mixture of about 99% oxygen and compressed air, which is finally mixed into a compressed gas containing about 81% oxygen. The oxygen-enriched gas is sent into the furnace through the tuyere water jacket to produce a chemical reaction with sulfur, coal and other objects in the melt in the furnace to obtain reaction heat. During the production process, the reaction of materials in the furnace body will produce a large amount of high-temperature flue gas. In order to recycle the heat in these high-temperature flue gases, a waste heat recovery device for recovering the waste heat of the flue gas is added to the furnace body in the prior art. The waste heat recovery device is provided with a number of heat exchange tubes, and water is stored in the heat exchange tubes. The heat of the input flue gas is used to heat the water in the heat exchange tubes, and the generated steam is input to the heat exchanger, which is connected to the oxygen-enriched gas input pipeline, so that the temperature of the oxygen-enriched gas can be increased after passing through the heat exchanger before entering the furnace body, thereby greatly reducing the energy consumption of the side-blowing furnace. When such technology is actually used, the high-temperature flue gas in the furnace body will be deposited on the surface of the heat exchange tube after a long period of contact with the heat exchange tube, forming a layer of attachment on the surface of the heat exchange tube. These attachments will greatly reduce the thermal conductivity of the heat exchange tube, making it impossible to fully absorb the waste heat of the flue gas.

Summary of the invention

The purpose of the present invention is to solve the problem in the prior art that a layer of attachments is formed on the surface of the heat exchange tube, which greatly reduces the thermal conductivity of the heat exchange tube and makes it impossible to fully absorb the waste heat of the flue gas, and to propose an oxygen-enriched side-blowing furnace.

In order to achieve the above object, the present invention adopts the following technical solutions:

An oxygen-enriched side-blowing furnace is designed, comprising a furnace body, an oxygen-enriched gas input pipeline of the furnace body is connected in series with a heat exchanger, a flue outlet of the furnace body is connected with a waste heat recovery device, and the waste heat recovery device is connected to the heat exchanger;

The waste heat recovery device includes a box body, in which a plurality of mutually parallel heat exchange tubes are arranged, the top ends of the heat exchange tubes are connected to the same upper communicating vessel, and the bottom ends of the heat exchange tubes are connected to the same lower communicating vessel, the lower communicating vessel is used to connect to a water supply device, and the upper communicating vessel is connected to the heat exchanger through a steam output pipe; a heat exchange cylinder is coaxially sleeved on each of the heat exchange tubes, the heat exchange cylinder is rotatably connected to the heat exchange tube, a sealing ring is fixed at each end of the heat exchange cylinder, the two sealing rings are used to form a sealed cavity between the heat exchange cylinder and the heat exchange tube, and a heat-conducting material is stored in the sealed cavity, a scraper in contact with the heat exchange cylinder is arranged on one side of each of the heat exchange cylinders, and the heat exchange cylinders are all drivingly connected to the drive module.

Preferably, the driving module includes a ball storage ball, which is connected in series to the steam output pipe. The ball storage ball includes a sphere, which is hollow inside. An air inlet pipe and an air outlet pipe are arranged on the outer surface of the sphere. A piston is coaxially and telescopically installed in the air outlet pipe. An exhaust hole is opened through the side of the air outlet pipe, and the exhaust hole is used to communicate with the steam output pipe. The piston is transmission-connected to the heat exchange cylinder so that when the piston moves, the heat exchange cylinder can be synchronously driven to rotate.

Preferably, a rotating ring is coaxially sleeved on the heat exchange tube above each of the heat exchange tubes, and the rotating ring is coaxially and telescopically connected to the heat exchange tube. A plurality of inclined bars are arranged around the heat exchange tube between the rotating ring heat exchange tubes, and the inclined bars are inclined to the same side, the top ends of the inclined bars are connected to the rotating rings, and the bottom ends of the inclined bars are connected to the sealing ring at the top end of the heat exchange tube, and each of the rotating rings is connected to the same bracket, and the bracket is connected to the piston.

Preferably, the scraper includes a back plate, the back plate is arranged corresponding to the heat exchange tube, a guide groove is opened on the back plate along its width direction, a guide block is slidably installed in the guide groove, the guide block is connected to the guide groove through a spring, a guide roller is rotatably installed on both sides of the back plate facing the heat exchange tube, the guide rollers are arranged parallel to the heat exchange tube, a guide roller can also be rotatable on the back plate between the two guide rollers, the three guide rollers are distributed in a triangle, and a flexible sleeve is sleeved between the three guide rollers; the outer surface of the flexible sleeve A plurality of scraping strips are fixed on the surface along the circumferential direction, and the scraping strips are arranged parallel to the heat exchange tube. A magnetic block is installed on the back plate in a telescopic manner along its width direction. A plurality of mounting grooves are opened on the outer surface of the heat exchange tube along the circumferential direction, and a magnetic strip is fixedly installed in each mounting groove. The magnetic strip and the magnetic block attract each other, and a pawl assembly is fixed on each magnetic block on the side facing the flexible sleeve. The pawl assembly is used to cooperate with the scraping strip, so that when the magnetic block makes a telescopic movement, the flexible sleeve can be synchronously driven by the pawl assembly to make a rotational movement between the three guide rollers.

Preferably, a plurality of brushes are fixed on the surface of the back plate on one side close to the flexible sleeve, and the brushes are in contact with the surface of the flexible sleeve.

Preferably, the pawl assembly comprises a pawl rod, one end of which is rotatably connected to a magnetic block, a baffle is fixed to the magnetic block on one side of the pawl rod, and a spring is fixed to the magnetic block on the other side of the pawl rod.

Preferably, the flexible sleeve is made of high temperature resistant non-woven fabric.

The oxygen-enriched side-blowing furnace proposed by the present invention has the beneficial effects of: a heat exchange cylinder is coaxially rotatably installed on the heat exchange tube, so that the flue gas first contacts the heat exchange cylinder, and then is transferred to the heat exchange tube through the heat-conducting material in the heat exchange cylinder, so that attachments are formed on the surface of the heat exchange cylinder, and the heat exchange cylinder can be driven by the driving module to rotate, and the rotating heat exchange cylinder scrapes with the corresponding scraper, so that the attachments on the surface of the heat exchange cylinder can be automatically removed, so that the surface of the heat exchange tube can always maintain a high heat exchange efficiency;

The driving module uses the steam generated by the water in the heat exchange tube as power to drive the heat exchange tube to rotate, thus simplifying the driving structure;

The scraper utilizes a flexible sleeve that performs a rotating motion, which continuously scrapes against the heat exchange tube, so that different parts of the flexible sleeve can participate in the removal of attachments on the surface of the heat exchange tube, and the attachment removal effect is better.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of an oxygen-enriched side-blowing furnace proposed by the present invention;

FIG2 is a schematic diagram of the main structure of a flue gas recovery module of an oxygen-enriched side-blown furnace proposed by the present invention;

FIG3 is a second schematic diagram of the main structure of a flue gas recovery module of an oxygen-enriched side-blown furnace proposed by the present invention;

FIG4 is a schematic diagram of the heat exchange tube and heat exchange cylinder structure of an oxygen-enriched side-blowing furnace proposed by the present invention;

FIG5 is a schematic diagram of the local structure of point A in FIG4 ;

FIG6 is a cross-sectional schematic diagram of a spherical storage ball of an oxygen-enriched side-blown furnace proposed by the present invention;

FIG7 is a schematic diagram of the structure of a scraper for an oxygen-enriched side-blown furnace proposed by the present invention;

FIG8 is a cross-sectional schematic diagram of a scraper of an oxygen-enriched side-blown furnace proposed by the present invention;

FIG9 is a schematic diagram of the local structure of point B in FIG8 ;

FIG10 is a schematic diagram of a working state of a ratchet assembly of an oxygen-enriched side-blown furnace proposed by the present invention;

FIG11 is a second schematic diagram of the working state of a ratchet assembly of an oxygen-enriched side-blown furnace proposed by the present invention;

FIG. 12 is a third schematic diagram of the working state of the pawl assembly of the oxygen-enriched side-blown furnace proposed by the present invention.

In the figure: 1. heat exchange tube; 2. upper communicating vessel; 3. lower communicating vessel; 4. heat exchange cylinder; 5. sealing ring; 6. scraper; 61. guide roller; 62. flexible sleeve; 63. back plate; 64. guide groove; 65. guide block; 66. spring; 67. magnetic block; 68. claw rod; 69. baffle; 610. reed; 611. scraper strip; 612. magnetic strip; 613. brush; 7. rotating ring; 8. inclined brace; 9. bracket; 10. steam output pipe; 11. sphere; 12. exhaust pipe; 13. piston; 14. exhaust hole; 15. box; 16. furnace body; 17. heat exchanger.

DETAILED DESCRIPTION

The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

Embodiment 1: Referring to Figures 1-6, an oxygen-enriched side-blowing furnace includes a furnace body 16, an oxygen-enriched gas input pipeline of the furnace body 16 is connected in series with a heat exchanger 17, a flue outlet of the furnace body 16 is connected with a waste heat recovery device, the waste heat recovery device is connected to the heat exchanger 17, the waste heat recovery device is used to recover waste heat of flue gas, and conduct the absorbed heat to the heat exchanger 17, so that the heat exchanger 17 can use the heat to preheat the oxygen-enriched gas;

The waste heat recovery device includes a box body 15, on which a smoke inlet and a smoke outlet are provided. The smoke inlet is used to communicate with the flue of the furnace body 16, and the smoke outlet is used to communicate with the smoke exhaust device. A plurality of mutually parallel heat exchange tubes 1 are provided in the box body 15. The top ends of the heat exchange tubes 1 are connected to the same upper communicating vessel 2, and the bottom ends of the heat exchange tubes 1 are connected to the same lower communicating vessel 3. The lower communicating vessel 3 is used to communicate with a water supply device, and the upper communicating vessel 2 is connected to the heat exchanger 17 through a steam output pipe 10; a heat exchange tube 4 is coaxially sleeved on each heat exchange tube 1, and the heat exchange tube 4 is rotatably connected to the heat exchange tube 1. A sealing ring 5 is fixed at each end of the heat exchange tube 4, and the two sealing rings 5 are used to form a sealed cavity between the heat exchange tube 4 and the heat exchange tube 1. A heat conductive material is stored in the sealed cavity. The heat conductive material is used to fill the gap between the heat exchange tube 4 and the heat exchange tube 1 to improve the heat conduction efficiency between the two and avoid the problem of reduced heat conduction efficiency due to the presence of air between the two. Each heat exchange tube 4 is provided with a scraper 6 in contact therewith on one side, and the scraper 6 is fixed on the box 15. The heat exchange tubes 4 are all connected to the driving module, and the driving module is used to drive the heat exchange tube 4 to rotate, so that the scraper 6 can scrape off the attachments on the surface of the heat exchange tube 4. A steam-water separator can also be provided on the steam output pipe 10 to separate the water vapor in the steam tube.

The driving module includes a gas storage ball, which is connected in series on the steam output pipe 10. The gas storage ball includes a sphere 11. The sphere 11 is hollow inside. An air inlet pipe and an air outlet pipe 12 are arranged on the outer surface of the sphere 11. A piston 13 is coaxially and telescopically installed in the air outlet pipe 12. An exhaust hole 14 is opened through the side of the air outlet pipe 12. The exhaust hole 14 is used to communicate with the steam output pipe 10. The piston 13 has two working states. The first working state is: when the pressure of steam entering the sphere 11 is relatively low, the piston 13 is in front of the exhaust hole 14. At this time, the air outlet pipe 12 and the steam output pipe 10 are blocked by the piston 13; when the pressure of steam entering the sphere 11 is relatively high, the piston 13 is pushed outward by the steam to the outside of the exhaust hole 14. At this time, the air outlet pipe 12 and the steam output pipe 10 are connected; the piston 13 is transmission-connected to the heat exchange cylinder 4, so that when the piston 13 moves, the heat exchange cylinder 4 can be synchronously driven to rotate.

Due to the provision of the piston 13, when water is input into the heat exchange tube 1, the air in the heat exchange tube 1 may not be discharged, resulting in water being unable to enter the heat exchange tube 1. Correspondingly, the upper communicating vessel 2 is also provided with an exhaust pipe connected to the interior thereof. The exhaust pipe is used to discharge the air in the heat exchange tube 1 during the process of inputting water into the heat exchange tube 1. A solenoid valve is installed on the exhaust pipe, and the solenoid valve is in a closed state after the water input is completed.

A rotating ring 7 is coaxially sleeved on the heat exchange tube 1 above each heat exchange tube 4. The rotating ring 7 is coaxially and telescopically connected to the heat exchange tube 1. A plurality of inclined braces 8 are arranged around the heat exchange tube 1 between the rotating ring 7 and the heat exchange tube 4. The inclined braces 8 are inclined to the same side. The top ends of the inclined braces 8 are connected to the rotating ring 7. The bottom ends of the inclined braces 8 are connected to the sealing ring 5 at the top of the heat exchange tube 4. Each rotating ring 7 is connected to the same bracket 9, and the bracket 9 is connected to the piston 13. When the piston 13 moves, the piston 13 drives the rotating ring 7 to extend and retract on the heat exchange tube 1 through the bracket 9. When the rotating ring 7 moves up and down, the rotating ring 7 exerts an oblique force on the heat exchange tube 4 through the plurality of inclined braces 8, so that the heat exchange tube 4 can rotate. In this way, the heat exchange tube 4 can rotate.

Embodiment 2: Referring to Figures 7-12, in Embodiment 1, most of the existing scrapers 6 are mostly single scrapers. When such scrapers are actually used, as more and more attachments accumulate on the scraper edge, it is difficult to scrape the surface of the heat exchange tube 4 clean; the scraper 6 includes a back plate 63, and the back plate 63 is arranged corresponding to the heat exchange tube 4. A guide roller 61 is rotatably installed on both sides of the back plate 63 facing the heat exchange tube 4. The guide rollers 61 are arranged parallel to the heat exchange tube 4. A guide roller 61 can also be rotatably mounted on the back plate 63 between the two guide rollers 61. The three guide rollers 61 are distributed in a triangle, and a flexible sleeve 62 is sleeved between the three guide rollers 61; the flexible sleeve 62 is made of high-temperature resistant non-woven fabric. Several scrapers 611 are fixed on the outer surface of the flexible sleeve 62 along the circumferential direction. The scrapers 611 are arranged parallel to the heat exchange tube 4. A magnetic block 67 can be installed on the back plate 63 in a telescopic manner along the width direction. A guide groove 64 is provided on the back plate 63 along the width direction. A guide block 65 can be slidably installed in the guide groove 64. The guide block 65 is connected to the guide groove 64 through a spring 66. Several mounting grooves are provided on the outer surface of the heat exchange tube 4 along the circumferential direction. A magnetic strip 612 is fixedly installed in each mounting groove. The magnetic strip 612 and the magnetic block 67 attract each other, so that the rotating heat exchange tube 4 can drive the magnetic block 67 to perform telescopic movement through the magnetic strip 612; a ratchet assembly is fixed on the side of each magnetic block 67 facing the flexible sleeve 62. The ratchet assembly is used to cooperate with the scraper 611, so that when the magnetic block 67 performs telescopic movement, the flexible sleeve 62 can be synchronously driven by the ratchet assembly to perform rotary movement between the three guide rollers 61. The flexible sleeve 62 that is being transported back and forth scrapes against the heat exchange tube 4, so that the flexible sleeve 62 is used to scrape off the deposits accumulated on the surface of the heat exchange tube 4. As the flexible sleeve 62 rotates, the surfaces of different parts thereof can scrape against the surface of the heat exchange tube 4, thereby avoiding the situation where too much deposits accumulate in one part, resulting in a decrease in the cleaning effect.

As shown in FIG9 , a plurality of brushes 613 are fixed on the surface of the back plate 63 near the flexible sleeve 62, and the brushes 613 are in contact with the surface of the flexible sleeve 62. The brushes 613 may be steel wire brushes 613, and the function of the brushes 613 is to sweep away the attachments scraped from the scraper strip 611 when the flexible sleeve 62 rotates, thereby ensuring that the scraper 6 is clean.

The pawl assembly includes a pawl rod 68, one end of which is rotatably connected to a magnetic block 67, a baffle 69 is fixed to the magnetic block 67 on one side of the pawl rod 68, and a spring 610 is fixed to the magnetic block 67 on the other side of the pawl rod 68. As shown in Figures 9-12, when the magnetic block 67 drives the pawl rod 68 to move toward the spring 610, the pawl rod 68 will remain in an upright state under the obstruction of the baffle 69, and the pawl rod 68 will resist the scraper 611 on the flexible sleeve 62, thereby pushing the flexible sleeve 62 to rotate; when the magnetic block 67 drives the pawl rod 68 to move toward the baffle 69, the pawl rod 68 will swing toward the spring 610 due to the action of the scraper 611 on the flexible sleeve 62, thereby staggering with the scraper 611, and the pawl rod 68 cannot drive the flexible sleeve 62 to move.

The overall workflow of the present invention is as follows:

When the water supply device inputs water into the lower communicating vessel 3, it will be respectively input into the multiple heat exchange tubes 1. When smoke is generated in the furnace body 16, the smoke enters the box body 15 through the flue on the furnace body 16, and heat exchanges with the water in the heat exchange tube 1 along the flue in the box body 15. The water in the heat exchange tube 1 is heated to generate steam, and the generated steam enters the upper communicating vessel 2. Finally, it is input into the heat exchanger 17 through the steam output pipe 10, and heat exchanges with the oxygen-enriched gas entering the furnace body 16 in the heat exchanger 17, thereby preheating the oxygen-enriched gas.

In the above process, when more and more steam accumulates in the storage ball on the steam output pipe 10, the gas pressure in the storage ball increases, thereby pushing up the piston 13 in the storage ball, so that the steam in the storage ball can be discharged into the steam output pipe through the exhaust hole 14. After the pressure is reduced, the piston 13 will reset. In the process of the piston 13 moving up and down, the piston 13 will drive the multiple rotating rings 7 to move up and down through the bracket 9. In the process of the rotating ring 7 moving up and down, the heat exchange tube 4 connected thereto will be driven to reciprocate through the multiple inclined bars 8. In the process of the rotation of the heat exchange tube 4, the heat exchange tube 4 will scrape with the flexible sleeve 62 on the corresponding scraper 6, so as to remove the attachments on the outer surface of the heat exchange tube 4, so that the surface of the heat exchange tube 4 can be kept clean to maintain a high heat exchange efficiency.

In addition, when the heat exchange tube 4 rotates, as shown in FIG11, whenever the magnetic strip 612 of the heat exchange tube 4 approaches the corresponding scraper 6, a magnetic force will be generated on the magnetic block 67 in the scraper 6, and a lateral movement force will be applied to the magnetic block 67, so that the magnetic block 67 moves laterally, and the magnetic block 67 then drives the claw rod 68 thereon to move, and the claw rod 68 will push the corresponding scraper strip 611 to drive the flexible sleeve 62 to move, so that the flexible sleeve 62 can make a rotational motion between the three guide rollers 61, so that the flexible sleeve 62 can allow different parts to contact the heat exchange tube 4 to obtain a better scraping effect of the attached objects; as shown in FIG12, when the magnetic strip 612 is staggered with the magnetic block 67, the magnetic block 67 will automatically reset, and during the resetting process, the claw rod 68 will swing to one side and will not drive the flexible sleeve 62 to move.

The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims (5)

1. An oxygen-enriched side-blown furnace, comprising a furnace body (16), characterized in that a heat exchanger (17) is connected in series to the oxygen-enriched gas input pipeline of the furnace body (16), a waste heat recovery device is connected to the flue outlet of the furnace body (16), and the waste heat recovery device is connected to the heat exchanger (17); The waste heat recovery device comprises a box body (15), wherein a plurality of mutually parallel heat exchange tubes (1) are arranged in the box body (15), wherein the top ends of the heat exchange tubes (1) are all connected to the same upper communicating vessel (2), and the bottom ends of the heat exchange tubes (1) are all connected to the same lower communicating vessel (3), wherein the lower communicating vessel (3) is used to connect to a water supply device, and the upper communicating vessel (2) is connected to the heat exchanger (17) via a steam output pipe (10); a heat exchange cylinder (4) is coaxially sleeved on each of the heat exchange tubes (1), wherein the heat exchange cylinder (4) is rotatably connected to the heat exchange tube (1), and a sealing ring (5) is fixed at each end of the heat exchange cylinder (4), wherein the two sealing rings (5) are used to form a sealed cavity between the heat exchange cylinder (4) and the heat exchange tube (1), wherein a heat conductive material is stored in the sealed cavity, and a scraper (6) in contact with the heat exchange cylinder (4) is arranged on one side of each of the heat exchange cylinders (4), and the heat exchange cylinders (4) are all drivingly connected to a drive module; The driving module comprises a ball storage sphere, which is connected in series to the steam output pipe (10). The ball storage sphere comprises a sphere (11), the sphere (11) is hollow inside, an air inlet pipe and an air outlet pipe (12) are arranged on the outer surface of the sphere (11), a piston (13) is coaxially and telescopically mounted inside the air outlet pipe (12), an exhaust hole (14) is formed through the side of the air outlet pipe (12), and the exhaust hole (14) is used to communicate with the steam output pipe (10); the piston (13) is drivingly connected to the heat exchange cylinder (4), so that when the piston (13) moves, the heat exchange cylinder (4) can be synchronously driven to rotate; The scraper (6) comprises a back plate (63), the back plate (63) being arranged corresponding to the heat exchange tube (4), a guide groove (64) penetrating the back plate (63) along its width direction, a guide block (65) being slidably mounted in the guide groove (64), the guide block (65) being connected to the guide groove (64) via a spring (66), a guide roller (61) being rotatably mounted on both sides of a side of the back plate (63) facing the heat exchange tube (4), the guide rollers (61) being arranged parallel to the heat exchange tube (4), a guide roller (61) being rotatable on the back plate (63) between two guide rollers (61), the three guide rollers (61) being distributed in a triangle, and a flexible sleeve (62) being sleeved between the three guide rollers (61); A plurality of scraping strips (611) are fixedly arranged on the outer surface of the flexible sleeve (62) along the circumferential direction, and the scraping strips (611) are arranged parallel to the heat exchange tube (4). A magnetic block (67) is installed on the back plate (63) in a telescopic manner along the width direction thereof. A plurality of mounting grooves are opened on the outer surface of the heat exchange tube (4) along the circumferential direction, and a magnetic strip (612) is fixedly installed in each of the mounting grooves. The magnetic strip (612) and the magnetic block (67) attract each other. A pawl assembly is fixedly arranged on the side of each magnetic block (67) facing the flexible sleeve (62), and the pawl assembly is used to cooperate with the scraping strip (611), so that when the magnetic block (67) performs a telescopic movement, the flexible sleeve (62) can be synchronously driven by the pawl assembly to perform a rotational movement between the three guide rollers (61). 2. The oxygen-enriched side-blowing furnace according to claim 1 is characterized in that a rotating ring (7) is coaxially sleeved on each heat exchange tube (1) above the heat exchange tube (4), and the rotating ring (7) is coaxially and telescopically connected to the heat exchange tube (1). A plurality of inclined braces (8) are arranged around the heat exchange tube (1) between the rotating ring (7) and the heat exchange tube (4), and the inclined braces (8) are all inclined toward the same side. The top ends of the inclined braces (8) are connected to the rotating ring (7), and the bottom ends of the inclined braces (8) are connected to the sealing ring (5) at the top end of the heat exchange tube (4). Each rotating ring (7) is connected to the same bracket (9), and the bracket (9) is connected to the piston (13). 3. The oxygen-enriched side-blown furnace according to claim 1 is characterized in that a plurality of brushes (613) are fixed to the surface of the back plate (63) close to the flexible sleeve (62), and the brushes (613) are in contact with the surface of the flexible sleeve (62). 4. The oxygen-enriched side-blown furnace according to claim 1 is characterized in that the pawl assembly comprises a pawl rod (68), one end of the pawl rod (68) is rotatably connected to the magnetic block (67), a baffle (69) is fixed on the magnetic block (67) on one side of the pawl rod (68), and a reed (610) is fixed on the magnetic block (67) on the other side of the pawl rod (68). 5. The oxygen-enriched side-blown furnace according to claim 1, characterized in that the flexible sleeve (62) is made of high-temperature resistant non-woven fabric.