A waste heat recovery system for high temperature liquid blast furnace slag

Abstract

The present invention relates to the technical field of waste heat recovery, and specifically to a waste heat recovery system for high-temperature liquid blast-furnace slag, comprising a shell, an upper heat exchanger is fixedly connected to the outer surface of the upper end of the shell, a water pipe is laid inside the shell near the lower end, the number of the water pipes is groups, a lower heat exchanger is fixedly connected to the right side of the water pipe, a slag inlet trough is slidably connected to the left outer surface of the shell near the upper end, a motor is fixedly connected to the middle of the right outer surface of the shell, a support frame is fixedly connected to the middle of the inner surface of the shell, and a gear box is fixedly connected to one end of the three support frames close to each other. The device can well control the depth of the liquid level inside the granulator when recovering the waste heat of the high-temperature liquid blast-furnace slag by arranging structures such as a float, an adjusting lever, and a baffle, and during the granulation process, water droplets are sprayed behind the flying high-temperature blast-furnace slag droplets, thereby enhancing the granulation effect of the liquid blast-furnace slag and improving the economic benefits.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery, and in particular to a high-temperature liquid blast furnace slag waste heat recovery system. Background Art

[0002] Blast furnace slag is a by-product produced during the steel production process and is a very valuable secondary resource. At present, the treatment of blast furnace slag is generally water quenching, which directly uses water to reduce the temperature of blast furnace slag, and then sends it to cement plants or building materials plants for use as building materials after cooling. The heat is not utilized, and the water slag even needs to be dried, which is a great waste of resources. The temperature of blast furnace slag out of the furnace is generally around 1450℃. The heat that can be utilized per ton of blast furnace slag is about 30kg of standard coal, and 300 to 500kg of blast furnace slag can be produced for each ton of pig iron smelted. It is roughly estimated that the recovery of waste heat from one ton of blast furnace slag can generate 100 degrees of electricity.

[0003] The existing patent (Announcement No.: CN108870994B) discloses a waste heat recovery system and method for liquid blast furnace slag, wherein the waste heat recovery system includes a main heat exchange device, a granulator, a driver, a superheater, an evaporator, a preheater, a gas-liquid separator and an injection device. In the waste heat recovery method, the liquid blast furnace slag in the granulator flies out of the granulator due to the centrifugal force and moves toward the inner wall of the working chamber to become spherical particles. The spherical particles exchange heat with the cold air ejected by the injection device to cool down to below 800°C. The cooled spherical particles exchange heat with the superheater, the evaporator and the preheater in turn and are discharged from the main heat exchange device. The cold water of the preheater exchanges heat with the spherical particles to form a first-level hot water that enters the gas-liquid separator. The second-level hot water in the gas-liquid separator enters the evaporator to exchange heat with the spherical particles to form a gas-liquid mixture that returns to the gas-liquid separator. The saturated steam in the gas-liquid separator enters the superheater to exchange heat with the spherical particles to form superheated steam that is discharged.

[0004] The above-mentioned comparative patent converts the liquid high-temperature blast-furnace slag into high-temperature solid particles through the granulation process through components such as a granulator, an air jet device, a driver, and an active heat exchanger. Although the blast-furnace slag can be converted from liquid to solid, the granulation effect of the blast-furnace slag will be affected when the liquid blast-furnace slag is too deep inside the granulator, and the liquid blast-furnace slag cannot be granulated efficiently. In addition, the liquid blast-furnace slag may also break when it hits the inner wall after granulation, causing the liquid blast-furnace slag to adhere to the inner wall of the waste heat recovery system, affecting the service life of the equipment.

[0005] Therefore, a waste heat recovery system for high-temperature liquid blast furnace slag is proposed. Summary of the invention

[0006] The object of the present invention is to provide a waste heat recovery system for high-temperature liquid blast-furnace slag. The device, by arranging structures such as a float, an adjusting lever, and a baffle, can well control the depth of the liquid surface inside the granulator during waste heat recovery of the high-temperature liquid blast-furnace slag, thereby enhancing the granulation effect of the liquid blast-furnace slag. In addition, during the granulation process, water droplets are sprayed behind the flying high-temperature blast-furnace slag droplets to enhance the granulation effect, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-temperature liquid blast furnace slag waste heat recovery system, comprising a shell, an upper heat exchanger is fixedly connected to the outer surface of the upper end of the shell, a water pipe is laid near the lower end of the shell, the number of the water pipes is a group, a lower heat exchanger is fixedly connected to the right side of the water pipe, a slag inlet trough is slidably connected to the left outer surface of the shell near the upper end, a motor is fixedly connected to the middle of the right outer surface of the shell, a support frame is fixedly connected to the middle of the inner surface of the shell, and three support frames are close to each other. The end is fixedly connected with a gear box, the interior of the right support frame passes through the right inner surface of the gear box, the interior of the right support frame passes through a motor shaft, the left side of the motor shaft extends to the interior of the gear box and is fixedly connected with a driving bevel gear, the right side of the motor shaft extends to the left side of the motor and is rotatably connected to the motor, the upper end outer surface of the gear box passes through and is rotatably connected with a turntable shaft, the lower end of the turntable shaft passes through the interior of the gear box and is fixedly connected with a driven bevel gear, the driven bevel gear is meshed with the driving bevel gear, and the upper end surface of the turntable shaft is fixed The granulating turntable is fixedly connected thereto; a water turntable is fixedly connected thereto in the middle of the outer surface of the turntable shaft; a lever bracket is fixedly connected thereto on the outer surface of the upper end of the slag inlet trough near the left position; a slag trough spring is fixedly sleeved on the outer surface of the slag inlet trough on the left side of the shell; the slag trough spring is fixedly connected to the shell; an upper bracket is fixedly connected to the upper part of the inner surface of the shell; a guide bar is penetrated and slidably connected thereto at the center position of the upper end outer surface of the shell; a balance spring is sleeved between the upper end of the guide bar and the upper end outer surface of the shell; the guide bar extends to the top of the granulating turntable; the guide bar A float is fixedly connected to the outer surface of the lower end, and a hinge is fixedly connected to the lower part of the guide bar near the float. A control lever is rotatably connected to the left side of the hinge, and the middle position of the lower end of the control lever is rotatably connected to the lever bracket. A sliding block is slidably sleeved on the left side of the control lever, and a control spring is fixedly sleeved between the sliding block and the control lever. A liquid slag baffle is hinged on the left side of the sliding block, and a baffle groove is opened at the middle position of the upper end outer surface of the slag feed trough and passes through the inner surface of the lower end of the slag feed trough, and the liquid slag baffle is located inside the baffle groove and is slidably connected to the baffle groove.

[0008] First, the equipment is powered on, the motor rotates to drive the motor shaft, the motor shaft drives the active bevel gear, and then the active bevel gear drives the driven bevel gear, the driven bevel gear drives the turntable shaft, and then the turntable shaft drives the granulation turntable. At this time, the high-temperature liquid slag flows into the granulation turntable from the slag inlet trough. The high-temperature liquid slag rotates at high speed driven by the high-speed rotation of the granulation turntable to generate centrifugal force. Under the action of centrifugal force, it is thrown out along the tangent direction of the granulation turntable, and the liquid high-temperature slag is transformed into solid high-temperature slag during the flight. During the flight, the unsolidified liquid slag will solidify first because the front end of the liquid slag contacts the air first. The water pipe can transfer the absorbed heat to the lower heat exchanger, and the upper heat exchanger can recover the hot air inside the waste heat recovery system.

[0009] When no high-temperature liquid slag is added inside the granulating turntable, the gravity of the float, guide bar and other components will be in a balanced state inside the shell under the action of the balance spring. This balanced state will cause the balance spring to undergo elastic deformation when subjected to external force. In this balanced state, the position of the float is slightly higher than the granulating turntable, and the float and the granulating turntable are not in contact. If the balance system composed of the balance spring, float and guide bar and other components is subjected to external force, the elastic force provided by the balance spring will change. According to Hooke's law, the deformation of the spring will change. At this time, if the granulating turntable is When high-temperature liquid blast furnace slag is added to the interior of the granulating turntable, the liquid level will gradually rise, and the float in a balanced state will be subject to an upward buoyancy, causing the float, guide bars and other components to move upward. When the granulating turntable rotates at a high speed to throw the high-temperature liquid slag out of the granulating turntable, the liquid level inside the granulating turntable will decrease, causing the float, guide bars and other components to move downward. The guide bars will move downward with the hinge, and the control lever will rotate downward on the left side of the control lever under the action of the hinge and the lever bracket. Under the action of the hinge, the left side of the control lever will tilt upward due to the lever principle, and the position The sliding block on the left side of the control lever will tilt up with the control lever, and the distance between the projection of the left end face of the control lever on the slag inlet trough and the lever bracket will change. Because the liquid slag baffle is inserted into the baffle groove of the slag inlet trough, the distance between the liquid slag baffle and the lever bracket will not change. Then the distance between the liquid slag baffle and the left end face of the control lever and the lever bracket will change. Because the sliding block and the liquid slag baffle are hinged, and the control lever and the sliding block are slidably connected, there will be no interference when the float and the guide bar and other components move with each other. By setting the guide bar , hinges, control levers, sliding blocks, liquid slag baffles and other components, so that when the high-temperature liquid blast-furnace slag inside the granulating turntable is sufficient, the amount of liquid molten slag entering the granulating turntable from the slag inlet trough can be reduced, so as to achieve a better granulation effect of the granulating turntable. Similarly, when the high-temperature liquid blast-furnace slag inside the granulating turntable is small, the amount of liquid molten slag entering the granulating turntable from the slag inlet trough can be increased, so as to meet the granulation efficiency of the liquid molten slag. By setting a control spring, the liquid slag baffle can be made to fit closely to the baffle groove, thereby enhancing the sealing effect of the liquid slag baffle and the slag inlet trough.

[0010] Preferably, a water inlet pipe is fixedly connected to the left outer surface of the shell below the slag inlet trough, and the water inlet pipe penetrates and extends to the interior of the shell.

[0011] Water is sprayed from the inside of the water inlet pipe to the water turntable, which gathers the water and drives the water on the water turntable to rotate, so that the water on the water turntable is thrown out along the tangent of the outer edge of the water turntable. No additional spraying equipment is required to achieve the sprinkling of water droplets, which reduces material costs and improves economic benefits.

[0012] Preferably, a baffle shaft is fixedly connected to the middle of the shell near the lower end, the number of the baffle shafts is groups, the baffle shafts are parallel to each other and located on a horizontal plane, and a rotating baffle is sleeved on the outer surface of the baffle shaft.

[0013] After the liquid high-temperature slag is transformed into a solid high-temperature slag during flight, the granulated particles hit the inner wall of the waste heat recovery system and then scatter downwards, falling on the upper surface of the rotating baffle, slowing down the granulated particles so that the granulated particles will not directly hit the water pipe. Since the rotating baffle can rotate around the baffle axis, after one side of the rotating baffle is hit by the granulated particles, the hit side will tilt downward, so that the particles can smoothly fall through the gaps between the rotating baffles, thereby protecting the water pipe while preventing it from being blocked by the granulated particles, reducing maintenance costs.

[0014] Preferably, a drainage groove is provided on the outer surface of the upper end of the granulation turntable, and the granulation turntable is open on all sides.

[0015] When the equipment is powered on, the motor rotates to drive the motor shaft, the motor shaft drives the active bevel gear, and then the active bevel gear drives the driven bevel gear, the driven bevel gear drives the turntable shaft, and then the turntable shaft drives the granulation turntable. At this time, the high-temperature liquid blast-furnace slag is located on the upper surface of the granulation turntable. Due to the tension of the liquid, after the granulation turntable throws out the high-temperature liquid blast-furnace slag, the slag liquid will form spherical droplets. A drainage groove is provided on the outer surface of the upper end of the granulation turntable and the surrounding areas of the granulation turntable are made to be upper openings, so that the high-temperature liquid blast-furnace slag can obtain a better granulation effect when it is thrown out by the granulation turntable, so that the efficiency of the waste heat recovery system in absorbing the granulated slag particles is increased, thereby reducing the time cost of the waste heat recovery system.

[0016] Preferably, an L-shaped scraper is fixedly connected to the outer surface of the lower end of the buoy, the interior of the buoy is a hollow closed structure, and the buoy and the L-shaped scraper are made of tungsten alloy steel.

[0017] When the liquid slag with a temperature of up to 1500° flows onto the granulation turntable, the granulation turntable rotates, and the L-shaped scraper can scrape the liquid slag on the upper surface of the granulation turntable to prevent the liquid slag from solidifying on the granulation turntable. The float and the liquid slag will have direct contact. The float and L-shaped scraper made of tungsten alloy steel can withstand such temperature and work normally, so that the overall service life of the equipment will not be reduced during long-term use, thereby improving the economic benefits of the waste heat recovery system.

[0018] Preferably, the radius of the water rotating disk is larger than the radius of the granulation rotating disk.

[0019] The motor drives the turntable shaft to rotate, and the turntable shaft drives the water turntable and the granulation turntable to rotate together. Because the radius of the granulation turntable is smaller than that of the water turntable, and the linear velocity of an object performing circular motion is related to the angle and radius of the object, when the angular velocity is the same, the linear velocity of the circular motion object is related to the radius of the circular motion of the object, so the speed of the water thrown out of the water turntable is greater than the speed of the liquid slag thrown out of the granulation turntable, so the thrown water will catch up from behind the liquid slag, and the liquid slag will contact the water, making the surface solidification layer of the small slag droplets more solid, thereby achieving the purpose of increasing the granulation efficiency of the liquid slag.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. By setting the guide bars, hinges, control levers, sliding blocks and liquid slag baffles and other components, the liquid level of the high-temperature liquid blast furnace slag inside the granulating turntable can adjust the amount of high-temperature liquid blast furnace slag entering the waste heat recovery device, so as to achieve the purpose of balancing the granulation effect of the granulating turntable 16 and the granulation efficiency of the liquid slag;

[0022] 2. By setting a water turntable with a radius larger than that of the granulation turntable, when the high-temperature liquid blast-furnace slag is thrown out by the granulation turntable, the small droplets can be solidified at the front end and then absorbed by the small water droplets at the rear end, making the surface solidification layer of the small slag droplets more solid, so that when the small slag particles hit the inner wall during the waste heat recovery process, they will not be broken due to the impact, preventing the liquid blast-furnace slag from adhering to the inner wall, so as to achieve the purpose of uniform granulation of the slag particles and increase the service life of the equipment, and can greatly improve the granulation efficiency of the high-temperature liquid blast-furnace slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a schematic cross-sectional view of the structure of the rear view of the present invention;

[0025] Figure 3 A sectional view of the main view of the present invention;

[0026] Figure 4 for Figure 2 Partial view of center A;

[0027] Figure 5 for Figure 2 Partial view of B;

[0028] Figure 6 for Figure 2 Partial view of middle C;

[0029] Figure 7 for Figure 2 Partial view of middle D;

[0030] Figure 8 for Figure 3 Partial view of E.

[0031] In the figure: 1, shell; 2, slag inlet trough; 3, water inlet pipe; 4, slag trough spring; 5, balance spring; 6, upper bracket; 7, motor; 8, lower heat exchanger; 9, active bevel gear; 10, upper heat exchanger; 11, guide bar; 12, hinge; 13, control lever; 14, float; 15, L-shaped scraper; 16, granulating turntable; 17, turntable shaft; 18, water turntable; 19, gear box; 20, support frame; 21, lever bracket; 22, control spring; 23, sliding block; 24, liquid slag baffle; 25, baffle groove; 26, water pipe; 27, baffle shaft; 28, rotating baffle; 29, motor shaft; 30, drainage trough; 31, driven bevel gear. DETAILED DESCRIPTION

[0032] 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.

[0033] See also Figures 1 to 8 , the present invention provides a technical solution:

[0034] A high temperature liquid blast furnace slag waste heat recovery system, such as Figures 1 to 6 , Figure 8As shown, it includes a shell 1, characterized in that an upper heat exchanger 10 is fixedly connected to the outer surface of the upper end of the shell 1, a water pipe 26 is laid near the lower end of the inside of the shell 1, and the number of the water pipes 26 is 7 groups. A lower heat exchanger 8 is fixedly connected to the right side of the water pipe 26, a slag inlet trough 2 is slidably connected to the left outer surface of the shell 1 near the upper end, a motor 7 is fixedly connected to the middle of the right outer surface of the shell 1, and a support frame 20 is fixedly connected to the middle of the inner surface of the shell 1, and one end of the three support frames 20 close to each other is fixedly connected to a gear box 19, and the inside of the support frame 20 on the right side passes through the gear box The right inner surface of 19, the interior of the right support frame 20 is penetrated by a motor shaft 29, the left side of the motor shaft 29 extends to the interior of the gear box 19 and is fixedly connected to the driving bevel gear 9, the right side of the motor shaft 29 extends to the left side of the motor 7 and is rotatably connected to the motor 7, the upper end outer surface of the gear box 19 penetrates and is rotatably connected to the turntable shaft 17, the lower end of the turntable shaft 17 penetrates the interior of the gear box 19 and is fixedly connected to the driven bevel gear 31, the driven bevel gear 31 is meshed with the driving bevel gear 9, and the upper end surface of the turntable shaft 17 is fixedly connected to the granulating turntable 16; A water turntable 18 is fixedly connected to the middle of the outer surface, a lever bracket 21 is fixedly connected to the upper outer surface of the slag inlet trough 2 near the left position, the outer surface of the slag inlet trough 2 is located on the left side of the shell 1 and is fixedly sleeved with a slag trough spring 4, the slag trough spring 4 is fixedly connected to the shell 1, an upper bracket 6 is fixedly connected to the upper inner surface of the shell 1, a guide bar 11 is penetrated and slidably connected to the center of the upper outer surface of the shell 1, a balance spring 5 is sleeved between the upper end of the guide bar 11 and the upper outer surface of the shell 1, the guide bar 11 extends to the top of the granulating turntable 16, and a float 14 is fixedly connected to the lower outer surface of the guide bar 11. A hinge 12 is fixedly connected to the lower part of the guide bar 11 near the float 14, and a control lever 13 is rotatably connected to the left side of the hinge 12. The middle position of the lower end of the control lever 13 is rotatably connected to the lever bracket 21. A sliding block 23 is slidably sleeved on the left side of the control lever 13. A control spring 22 is fixedly sleeved between the sliding block 23 and the control lever 13. A liquid slag baffle 24 is hingedly connected to the left side of the sliding block 23. A baffle groove 25 that penetrates to the inner surface of the lower end of the slag inlet trough 2 is provided at the middle position of the upper end outer surface of the slag inlet trough 2. The liquid slag baffle 24 is located inside the baffle groove 25 and is slidably connected to the baffle groove 25.

[0035] During operation, the equipment is powered on first, the motor 7 rotates to drive the motor shaft 29 to rotate, the motor shaft 29 drives the active bevel gear 9 to rotate, and then the active bevel gear 9 rotates to drive the driven bevel gear 31 to rotate, the driven bevel gear 31 drives the turntable shaft 17 to rotate, and then the turntable shaft 17 drives the granulation turntable 16 to rotate. At this time, the high-temperature liquid slag flows into the granulation turntable 16 from the slag inlet trough 2. The high-temperature liquid slag rotates at a high speed driven by the high-speed rotation of the granulation turntable 16 to generate centrifugal force. Under the action of the centrifugal force, it is thrown out along the tangential direction of the granulation turntable 16, and the process of converting the liquid high-temperature slag into solid high-temperature slag is completed during the flight. During the flight, the unsolidified liquid slag will first contact the air because the front end of the liquid slag will solidify first. The water pipe 26 can transfer the absorbed heat to the lower heat exchanger 8, and the upper heat exchanger 10 can recover the hot air inside the waste heat recovery system.

[0036] When no high-temperature liquid slag is added to the granulating turntable 16, the gravity of the components such as the float 14 and the guide bar 11 will be in a balanced state inside the shell 1 under the action of the balance spring 5. This balanced state will cause the balance spring 5 to undergo elastic deformation when subjected to an external force. In this balanced state, the position of the float 14 is slightly higher than the granulating turntable 16, and the float 14 and the granulating turntable 16 are not in contact. If the balance system composed of the balance spring 5, the float 14, the guide bar 11 and other components is subjected to an external force, the elastic force provided by the balance spring 5 will change. According to Hooke's law, it can be known that the deformation of the spring will change. At this time, if an external force is added to the inside of the granulating turntable 16, the elastic force provided by the balance spring 5 will change. When high-temperature liquid blast furnace slag is poured into the granulator 16, the liquid level will gradually rise, and the buoy 14 in a balanced state will be subject to an upward buoyancy, causing the buoy 14, the guide bar 11 and other components to move upward. When the granulator 16 rotates at a high speed to throw the high-temperature liquid slag out of the granulator 16, the liquid level inside the granulator 16 will decrease, causing the buoy 14, the guide bar 11 and other components to move downward. The guide bar 11 will move downward with the hinge 12, and the control lever 13 will rotate the left side of the control lever 13 downward under the action of the hinge 12 and the lever bracket 21. Under the action of the hinge 12, the left side of the control lever 13 will tilt upward due to the lever principle, and the control lever 13 located at the control lever 1 The left sliding block 23 will tilt up along with the control lever 13, and the distance between the projection of the left end face of the control lever 13 on the slag inlet trough 2 and the lever bracket 21 will change. Since the liquid slag baffle 24 is inserted into the baffle groove 25 of the slag inlet trough 2, the distance between the liquid slag baffle 24 and the lever bracket 21 will not change. Therefore, the distance between the liquid slag baffle 24 and the left end face of the control lever 13 and the lever bracket 21 will change. Since the sliding block 23 and the liquid slag baffle 24 are hinged, and the control lever 13 and the sliding block 23 are slidably connected, when the buoy 14 and the guide bar 11 and other components move with each other, no interference will occur. By setting the guide bar Components such as the bar 11, the hinge 12, the control lever 13, the sliding block 23 and the liquid slag baffle 24 enable the high-temperature liquid blast-furnace slag inside the granulating turntable 16 to reduce the amount of liquid slag entering the granulating turntable 16 from the slag inlet trough 2 when the high-temperature liquid blast-furnace slag inside the granulating turntable 16 is sufficient, so as to achieve a better granulation effect of the granulating turntable 16. Similarly, when the high-temperature liquid blast-furnace slag inside the granulating turntable 16 is small, the amount of liquid slag entering the granulating turntable 16 from the slag inlet trough 2 will be increased to meet the granulation efficiency of the liquid slag. By setting the control spring 22, the liquid slag baffle 24 can be made to fit closely to the baffle groove 25, thereby enhancing the sealing effect of the liquid slag baffle 24 and the slag inlet trough 2.

[0037] As an embodiment of the present invention, Figure 1 As shown, the left outer surface of the shell 1 is located below the slag inlet trough 2 and is fixedly connected with a water inlet pipe 3, and the water inlet pipe 3 penetrates and extends to the interior of the shell 1;

[0038] During operation, water is sprayed from the inside of the water inlet pipe 3 to the water turntable 18, which collects the water and drives the water on the water turntable 18 to rotate, so that the water on the water turntable 18 is thrown out along the tangent line of the outer edge of the water turntable 18.

[0039] As an embodiment of the present invention, Figure 7 As shown, a baffle shaft 27 is fixedly connected to the middle part of the housing 1 near the lower end, and the number of the baffle shafts 27 is 9 groups. The baffle shafts 27 are parallel to each other and located on a horizontal plane. The outer surface of the baffle shaft 27 is sleeved with a rotating baffle 28;

[0040] During operation, after the liquid high-temperature slag is transformed into a solid high-temperature slag during flight, the granulated particles hit the inner wall of the waste heat recovery system and then scatter downward, falling on the upper surface of the rotating baffle 28, and the granulated particles are decelerated, so that the granulated particles will not directly hit the water pipe 26. Since the rotating baffle 28 can rotate around the baffle shaft 27, after one side of the rotating baffle 28 is hit by the granulated particles, the hit side will tilt downward, so that the particles can smoothly fall through the gap between the rotating baffles 28, thereby protecting the water pipe 26 while preventing it from being blocked by the granulated particles.

[0041] As an embodiment of the present invention, Figure 1 As shown, a drainage groove 30 is provided on the outer surface of the upper end of the granulating turntable 16, and the granulating turntable 16 is open on all sides.

[0042] During operation, the equipment is powered on, the motor 7 rotates to drive the motor shaft 29 to rotate, the motor shaft 29 drives the active bevel gear 9 to rotate, and then the active bevel gear 9 rotates to drive the driven bevel gear 31 to rotate, the driven bevel gear 31 drives the turntable shaft 17 to rotate, and then the turntable shaft 17 drives the granulation turntable 16 to rotate. At this time, the high-temperature liquid blast-furnace slag is located on the upper surface of the granulation turntable 16. Due to the tension of the liquid, after the granulation turntable 16 throws out the high-temperature liquid blast-furnace slag, the slag liquid will form spherical droplets. A drainage groove 30 is provided on the outer surface of the upper end of the granulation turntable 16, and the surrounding areas of the granulation turntable 16 are made into an upper opening shape, so that the high-temperature liquid blast-furnace slag can obtain a better granulation effect when it is thrown out by the granulation turntable 16, so that the efficiency of the waste heat recovery system in absorbing the granulated slag particles is increased, and the time cost of the waste heat recovery system is reduced.

[0043] As an embodiment of the present invention, Figure 8 As shown, an L-shaped scraper 15 is fixedly connected to the outer surface of the lower end of the buoy 14, and the interior of the buoy 14 is a hollow and closed structure. The buoy 14 and the L-shaped scraper 15 are made of tungsten alloy steel;

[0044] During operation, when the liquid slag with a temperature of up to 1500° flows onto the granulation turntable 16, the granulation turntable 16 rotates, and the L-shaped scraper 15 can scrape the liquid slag on the upper surface of the granulation turntable 16 to prevent the liquid slag from solidifying on the granulation turntable 16. The float 14 and the liquid slag will have direct contact. The float 14 and the L-shaped scraper 15 made of tungsten alloy steel can withstand such temperature and work normally.

[0045] As an embodiment of the present invention, Figure 8 As shown, the radius of the water turntable 18 is larger than the radius of the granulation turntable 16;

[0046] During operation, the motor 7 rotates the turntable shaft 17, and the turntable shaft 17 drives the water turntable 18 and the granulation turntable 16 to rotate. Because the radius of the granulation turntable 16 is smaller than that of the water turntable 18, and the linear velocity of an object performing circular motion is related to the angle and radius of the object, when the angular velocity is the same, the linear velocity of the circular motion object is related to the radius of the circular motion of the object, so the speed of the water thrown out of the water turntable 18 is greater than the speed of the liquid slag thrown out of the granulation turntable 16, so the thrown water will catch up from behind the liquid slag, and the liquid slag will contact with the water, making the surface solidification layer of the small slag droplets more solid, so as to achieve the purpose of increasing the granulation efficiency of the liquid slag when impacting.

[0047] Working principle:

[0048] During operation, the equipment is powered on first, the motor 7 rotates to drive the motor shaft 29 to rotate, the motor shaft 29 drives the active bevel gear 9 to rotate, and then the active bevel gear 9 rotates to drive the driven bevel gear 31 to rotate, the driven bevel gear 31 drives the turntable shaft 17 to rotate, and then the turntable shaft 17 drives the granulation turntable 16 to rotate. At this time, the high-temperature liquid slag flows into the granulation turntable 16 from the slag inlet trough 2. The high-temperature liquid slag rotates at a high speed driven by the high-speed rotation of the granulation turntable 16 to generate centrifugal force. Under the action of the centrifugal force, it is thrown out along the tangential direction of the granulation turntable 16, and the process of converting the liquid high-temperature slag into solid high-temperature slag is completed during the flight. During the flight, the unsolidified liquid slag will first contact the air because the front end of the liquid slag contacts the air first. First solidify, the water pipe 26 can transfer the absorbed heat to the lower heat exchanger 8, and the upper heat exchanger 10 can recover the hot air inside the waste heat recovery system. When no high-temperature liquid slag is added to the granulating turntable 16, the gravity of the float 14, the guide bar 11 and other components will be in a balanced state inside the shell 1 under the action of the balance spring 5. This balanced state will cause the balance spring 5 to undergo elastic deformation when subjected to external force. In this balanced state, the position of the float 14 is slightly higher than the granulating turntable 16, and the float 14 and the granulating turntable 16 are not in contact. If the balance system composed of the balance spring 5, the float 14, the guide bar 11 and other components is subjected to external force, the elastic force provided by the balance spring 5 will change. According to Hooke's law, it can be known that the spring The deformation amount will change. At this time, if high-temperature liquid blast furnace slag is added to the inside of the granulating turntable 16, the liquid level will gradually rise, and the float 14 in a balanced state will be subjected to an upward buoyancy, causing the float 14 and the guide bar 11 and other components to move upward. When the granulating turntable 16 rotates at a high speed to throw the high-temperature liquid slag out of the granulating turntable 16, the liquid level inside the granulating turntable 16 will decrease, causing the float 14 and the guide bar 11 and other components to move downward. The guide bar 11 will move downward with the hinge 12, and the control lever 13 will rotate the left side of the control lever 13 downward under the action of the hinge 12 and the lever bracket 21. Under the action of the hinge 12, the left side of the control lever 13 will tilt upward due to the lever principle, and the control lever 13 located on the left side will rotate downward. The sliding block 23 will tilt up with the control lever 13, and the distance between the projection of the left end face of the control lever 13 on the slag inlet trough 2 and the lever bracket 21 will change. Because the liquid slag baffle 24 is inserted into the baffle groove 25 of the slag inlet trough 2, the distance between the liquid slag baffle 24 and the lever bracket 21 will not change. Then the distance between the liquid slag baffle 24 and the left end face of the control lever 13 and the lever bracket 21 will change. Because the sliding block 23 and the liquid slag baffle 24 are hinged, and the control lever 13 and the sliding block 23 are slidably connected, when the float 14 and the guide bar 11 and other components move with each other, no interference will occur. By arranging the guide bar 11, the hinge 12, the control lever 13, the sliding block 23 and the liquid slag baffle 24 and other components,When the high-temperature liquid blast furnace slag inside the granulation turntable 16 is sufficient, the amount of liquid slag entering the granulation turntable 16 from the slag inlet trough 2 can be reduced, so as to achieve the purpose of making the granulation effect of the granulation turntable 16 better. Similarly, when the high-temperature liquid blast furnace slag inside the granulation turntable 16 is small, the amount of liquid slag entering the granulation turntable 16 from the slag inlet trough 2 can be increased to meet the granulation efficiency of the liquid slag. By setting the control spring 22, the liquid slag baffle 24 can be close to the baffle groove 25, thereby strengthening the sealing effect of the liquid slag baffle 24 and the slag inlet trough 2. Water is sprayed from the inside of the water inlet pipe 3 to the water turntable 18, and the water turntable 18 gathers the water, and the water turntable 18 drives the water on the water turntable 18 to rotate, so that the water on the water turntable 18 is tangent to the outer edge of the water turntable 18. The slag is thrown out without additional spraying equipment, which reduces material costs and improves economic benefits. After the liquid high-temperature slag is transformed into a solid high-temperature slag during flight, the granulated particles hit the inner wall of the waste heat recovery system and then fall downward, falling on the upper surface of the rotating baffle 28 to reduce the speed of the granulated particles, so that the granulated particles will not directly hit the water pipe 26. Since the rotating baffle 28 can rotate around the baffle shaft 27, after one side of the rotating baffle 28 is hit by the granulated particles, the hit side will tilt downward, so that the particles can smoothly fall from the gap between the rotating baffles 28, thereby protecting the water pipe 26 while preventing the granulated particles from clogging it, thereby reducing Maintenance cost. After the granulation turntable 16 throws out the high-temperature liquid blast furnace slag, the slag liquid will form spherical droplets. A drainage groove 30 is opened on the outer surface of the upper end of the granulation turntable 16 and the four sides of the granulation turntable 16 are opened upward, so that the high-temperature liquid blast furnace slag can obtain a better granulation effect when it is thrown out by the granulation turntable 16, so that the efficiency of the waste heat recovery system in absorbing the granulated slag particles is improved, and the time cost of the waste heat recovery system is reduced. When the liquid slag with a temperature of up to 1500° flows onto the granulation turntable 16, the granulation turntable 16 rotates, and the L-shaped scraper 15 can scrape the liquid slag on the upper surface of the granulation turntable 16 to prevent the liquid slag from solidifying on the granulation turntable 16. The float 14 will have direct contact with the liquid slag. The float 1 made of tungsten alloy steel 4 and the L-shaped scraper 15 can withstand such a temperature and work normally, so that the overall service life of the equipment will not be reduced after long-term use, and the economic benefits of the waste heat recovery system are improved. The motor 7 rotates the turntable shaft 17, and the turntable shaft 17 drives the water turntable 18 and the granulation turntable 16 to rotate. Because the radius of the granulation turntable 16 is smaller than the radius of the water turntable 18, and the linear velocity of an object doing circular motion is related to the angle and radius of the object, so when the angular velocity is the same, the linear velocity of the circular motion object is related to the radius of the circular motion of the object, so the speed of the water thrown out of the water turntable 18 is greater than the speed of the liquid slag thrown out of the granulation turntable 16, so the thrown water will catch up with and adhere to the slag droplets from behind the liquid slag, and the liquid slag will contact with the water,The surface solidification layer of the slag droplets is made more solid, so as to increase the granulation efficiency of the liquid slag.

[0049] 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. A high-temperature liquid blast furnace slag waste heat recovery system, comprising a shell (1), characterized in that: The upper outer surface of the shell (1) is fixedly connected to an upper heat exchanger (10); a water pipe (26) is laid near the lower end of the shell (1); the number of the water pipes (26) is 7 groups; the right side of the water pipe (26) is fixedly connected to a lower heat exchanger (8); the left outer surface of the shell (1) is slidably connected to a slag inlet trough (2) near the upper end; the middle of the right outer surface of the shell (1) is fixedly connected to a motor (7); the middle of the inner surface of the shell (1) is fixedly connected to a support frame (20); one end of the three support frames (20) close to each other is fixedly connected to a gear box (19); the interior of the right support frame (20) passes through the right inner surface of the gear box (19); the right support frame (20) is connected to the right inner surface of the gear box (19); A motor shaft (29) is passed through the interior of the support frame (20); the left side of the motor shaft (29) extends to the interior of the gear box (19) and is fixedly connected to the driving bevel gear (9); the right side of the motor shaft (29) extends to the left side of the motor (7) and is rotatably connected to the motor (7); the upper end outer surface of the gear box (19) passes through and is rotatably connected to the turntable shaft (17); the lower end of the turntable shaft (17) passes through the interior of the gear box (19) and is fixedly connected to the driven bevel gear (31); the driven bevel gear (31) and the driving bevel gear (9) are meshed; the upper end surface of the turntable shaft (17) is fixedly connected to the granulating turntable (16); the middle part of the outer surface of the turntable shaft (17) is fixedly connected to the water The granulating turntable (18) is provided with a lever bracket (21) fixedly connected to the upper outer surface of the slag inlet trough (2) near the left position. The outer surface of the slag inlet trough (2) is located on the left side of the shell (1) and is fixedly sleeved with a slag trough spring (4). The slag trough spring (4) is fixedly connected to the shell (1). The upper inner surface of the shell (1) is fixedly connected with an upper bracket (6). A guide bar (11) passes through and is slidably connected to the center of the upper outer surface of the shell (1). A balance spring (5) is sleeved between the upper end of the guide bar (11) and the upper outer surface of the shell (1). The guide bar (11) extends to the top of the granulating turntable (16). The lower outer surface of the guide bar (11) is fixedly connected with a float (14). ) is fixedly connected with a hinge (12) at a position near the float (14) at the lower part, the left side of the hinge (12) is rotatably connected with a control lever (13), the middle position of the lower end of the control lever (13) is rotatably connected with a lever bracket (21), the left side of the control lever (13) is slidably sleeved with a sliding block (23), a control spring (22) is fixedly sleeved between the sliding block (23) and the control lever (13), the left side of the sliding block (23) is hinged with a liquid slag baffle (24), the middle position of the upper end outer surface of the slag feed trough (2) is provided with a baffle groove (25) penetrating to the lower end inner surface of the slag feed trough (2), the liquid slag baffle (24) is located inside the baffle groove (25) and is slidably connected to the baffle groove (25).

2. A high temperature liquid blast furnace slag waste heat recovery system according to claim 1, characterized in that: A water inlet pipe (3) is fixedly connected to the left outer surface of the shell (1) below the slag inlet trough (2), and the water inlet pipe (3) penetrates and extends to the interior of the shell (1).

3. A high temperature liquid blast furnace slag waste heat recovery system according to claim 1, characterized in that: A baffle rotating shaft (27) is fixedly connected to a position near the lower end of the middle part of the shell (1), the number of the baffle rotating shafts (27) is 9 groups, the baffle rotating shafts (27) are all parallel to each other and located on a horizontal plane, and a rotating baffle (28) is sleeved on the outer surface of the baffle rotating shaft (27).

4. A high temperature liquid blast furnace slag waste heat recovery system according to claim 1, characterized in that: The outer surface of the upper end of the granulation rotating disk (16) is provided with a drainage groove (30), and the granulation rotating disk (16) is open on all sides.

5. A high temperature liquid blast furnace slag waste heat recovery system according to claim 1, characterized in that: An L-shaped scraper (15) is fixedly connected to the outer surface of the lower end of the buoy (14); the interior of the buoy (14) is a hollow closed structure; and the buoy (14) and the L-shaped scraper (15) are made of tungsten alloy steel.

6. A high temperature liquid blast furnace slag waste heat recovery system according to claim 1, characterized in that: A water turntable (18) is fixedly connected to the middle of the outer surface of the turntable shaft (17), and the radius of the water turntable (18) is larger than the radius of the granulation turntable (16).

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