A device and method for recovering waste heat from cooling slag

Abstract

The present invention relates to the technical field of waste heat recovery, and discloses a steel slag cooling waste heat recovery device and method, comprising a support frame, on which are mounted an air-cooled slag-forming mechanism, a waste heat transfer mechanism and a heat exchanger, the air-cooled slag-forming mechanism being connected to the tuyere end of the heat exchanger for providing hot air to the heat exchanger; the waste heat transfer mechanism being connected to the water inlet end of the heat exchanger for supplying water to the heat exchanger, and the water in the heat exchanger being used to absorb the heat in the hot air to realize waste heat recovery. The present invention solves the problem that waste of steel slag heat causes waste heat and also causes serious environmental pollution.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat recovery, and in particular to a device and method for recovering waste heat from cooling slag. Background Art

[0002] In the converter steelmaking process of the metallurgical industry, the carbon content of molten iron is reduced after oxygen is blown through an oxygen lance, thereby realizing the transformation from molten iron to molten steel. After the converter steelmaking is completed, the molten steel flows to the hot rolling process, and the remaining slag is mainly cooled by cold abandonment, hot pouring, water quenching, wind quenching, drum, shallow plate and granulation wheel method. Some steel mills originally used a simple water quenching process, but with the adoption of the slag splashing furnace protection process, the water quenching process is no longer suitable for process requirements. After the water quenching process is cancelled, a simple method of cooling the slag, pouring it on the ground, cooling it, and then loading it for transportation is often adopted. As a result, it causes a lot of dust and serious environmental pollution, and it is also difficult to crush it after transportation. Since the temperature of the slag out of the converter is between 1350~1450℃, most steel mills currently use the cold abandonment method to treat it. This treatment method will not only greatly waste the heat of the slag and cause waste heat waste, but also cause serious environmental pollution. Summary of the invention

[0003] In order to solve the problem of waste heat caused by wasting steel slag heat and causing serious environmental pollution, the purpose of the present invention is to provide a steel slag cooling waste heat recovery device and method.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a steel slag cooling waste heat recovery device, comprising a support frame, on which an air-cooled slag-forming mechanism, a waste heat transfer mechanism and a heat exchanger are installed, the air-cooled slag-forming mechanism is connected to the air outlet end of the heat exchanger to provide hot air to the heat exchanger; the waste heat transfer mechanism is connected to the water inlet end of the heat exchanger to supply water to the heat exchanger, and the water in the heat exchanger is used to absorb the heat in the hot air to realize the recovery and utilization of waste heat;

[0005] The air-cooled slag-forming mechanism includes a drum, one end of which is fixedly connected to an annular tube, the interior of the annular tube is communicated with the interior of the drum, an annular wind collecting hood communicated with the interior of the annular tube is rotatably sleeved on the outer wall of the annular tube, a plurality of rotating shafts arranged in an annular array are installed on the inner wall of the drum, a plurality of first clapping plates are fixedly connected to the outer wall of the rotating shaft, a driving mechanism which can drive the plurality of first clapping plates to reciprocate and beat by the rotation of the drum is installed on the annular tube and the annular wind collecting hood, a trumpet-shaped lifting hood is fixedly connected to the inner wall of the drum, and a rotatable second clapping plate is installed at the axis of the drum for clapping the smaller diameter of the trumpet-shaped lifting hood The material is lifted; the outer wall of the tail of the drum is rotatably sleeved with a cover, and a rotatable flow distribution cover is installed at the center of the drum near the tail, which is used to spread airflow to the inside of the drum; the flow distribution cover can drive the second flapping plate to rotate; one end of the flow distribution cover is connected to an air inlet pipe, which rotates through the cover and extends to the outside; the inner wall of the annular tube is provided with a first material distribution groove arranged in an annular array, and the first material distribution groove is arranged in an inclined arc along the inner wall of the annular tube; the inner wall of the trumpet-shaped lifting cover is provided with a second material distribution groove arranged in an annular array, and the second material distribution groove is arranged in an inclined arc along the inner wall of the trumpet-shaped lifting cover;

[0006] The waste heat transfer mechanism includes a fixed cylinder, a rotatable heat absorption tube is installed in the fixed cylinder, one end of the heat absorption tube is connected to a water inlet pipe, and the other end of the heat absorption tube is connected to a water outlet pipe. The inner wall of the tail of the fixed cylinder is rotatably sleeved with a partition, the water inlet pipe is fixedly passed through the axis of the partition, and the water outlet pipe is fixedly passed through the partition; the outer wall of the fixed cylinder located below is fixedly connected with a discharge port communicated with the interior thereof; the outer wall of the tail of the fixed cylinder is fixedly sleeved with a water collecting cover, the water inlet pipe is rotatably passed through the axis of the water collecting cover and extends to the outside; the water outlet pipe extends between the partition and the water collecting cover;

[0007] The side wall of the cover is connected with a connecting pipe communicating with the inside of the drum at an angle downward, and the connecting pipe is fixed through one end of the fixed cylinder and is used to transport materials to the fixed cylinder;

[0008] The heat absorption tube is arranged in a flat shape and includes a cross detour portion and a spiral portion. The end of the spiral portion close to the connecting pipe is connected to an L-shaped connecting portion bent toward the inside of the spiral portion. The L-shaped connecting portion is connected to one end of the cross detour portion. The cross detour portion is arranged inside the spiral portion. The end of the cross detour portion away from the L-shaped connecting portion is connected to the water inlet pipe, and the end of the spiral portion away from the L-shaped connecting portion is connected to the water outlet pipe. The outer wall of the spiral portion is slidably connected to the inner wall of the fixed tube.

[0009] Preferably, the support frame includes a base, and the top surface of the base is fixedly connected to two first support seats and two second support seats, the tops of the two first support seats are fixedly connected to the annular wind collecting hood and the sealing cover respectively; the tops of the two second support seats are fixedly connected to the fixed cylinder.

[0010] Preferably, a first motor is fixedly mounted on the first support seat, an output end shaft of the first motor is connected to a driving gear, and a gear ring meshing with the driving gear is fixedly sleeved on the outer wall of the drum.

[0011] Preferably, the driving mechanism includes a first rectangular plate and a second rectangular plate fixedly arranged at the end of the annular tube, an arc rod is fixedly connected to the first rectangular plate and the second rectangular plate, the center of the arc rod coincides with the axis of the rotating shaft, the outer wall of the arc rod is slidably sleeved with a movable plate, the movable plate is fixedly connected to the rotating shaft, the outer wall of the arc rod is sleeved with a spring that is tightly pressed against the movable plate, the driving mechanism also includes a shift plate fixedly arranged on the outer wall of the rotating shaft, the driving mechanism also includes a fixed rod fixedly connected to the annular wind collecting hood, the fixed rod is fixedly connected to the annular plate, the inner wall of the annular plate is fixedly connected to a plurality of U-shaped frames arranged in a circular array, the inner wall of the U-shaped frame is axially connected to a roller that is matched with the shift plate as a blocking connection.

[0012] Preferably, the rotating shaft rotates and passes through the two ends of the annular tube, the inner wall of the drum is provided with an inlay groove, the rotating shaft is rotatably embedded in the inlay groove, the outer wall of the annular air collecting hood is provided with a plurality of first through holes, the inner wall of the annular air collecting hood is open, the first through holes are located inside the annular air collecting hood, a plurality of second through holes are provided at one end of the annular tube located inside the drum, a trumpet-shaped protective cover is fixedly connected to the port of the annular tube located inside the drum, a plurality of second through holes are located on the rear side of the trumpet-shaped protective cover, the outer wall of the annular air collecting hood is connected with an exhaust interface connected with the interior thereof, and the exhaust interface is connected to the air outlet end of the heat exchanger.

[0013] Preferably, a fan is fixedly mounted on the cover, the inner wall of the fan outlet is rotatably sleeved on the outer wall at the air inlet duct port, the side of the flow distribution hood facing the annular tube is arranged as a conical surface, and a plurality of air outlet holes are opened on the conical surface; a connecting rod is fixedly connected to the center of the flow distribution hood, the outer wall of the connecting rod is fixedly connected to the second flapping plate, the small mouth end of the trumpet-shaped lifting cover is arranged toward the cover, the outer wall of the air inlet duct is fixedly sleeved with a first driven pulley, a second motor is fixedly mounted on the cover, the output end shaft of the second motor is connected to the first driving pulley, the first driving pulley and the first driven pulley are driven by a first belt.

[0014] Preferably, a third motor is fixedly mounted on the water collecting hood, the output end shaft of the third motor is connected to a second driving pulley, the outer wall of the water inlet pipe is fixedly sleeved with a second driven pulley, the second driving pulley and the second driven pulley are driven by a second belt, a water inlet interface is fixedly mounted on the water collecting hood, the inner wall of the water inlet interface is rotatably sleeved on the outer wall at the water inlet pipe port, the outer wall below the water collecting hood is fixedly connected with a water outlet interface connected to the interior thereof, and the water outlet interface is connected to the water inlet end of the heat exchanger.

[0015] Preferably, four first reinforcing rods are fixedly connected to the end of the water inlet pipe, the outer wall of the first reinforcing rods is fixedly connected to the turning point of the cross detour part, the four first reinforcing rods are fixedly connected to a circular block at one end away from the water inlet pipe, a plurality of second reinforcing rods are fixedly connected to the inner wall of the spiral part, a plurality of third reinforcing rods are fixedly connected to the outer wall of the second reinforcing rods, and the end of the third reinforcing rods away from the second reinforcing rods is fixedly connected to the cross detour part.

[0016] Preferably, the roller is tilted, and the end close to the connecting pipe tilts downward; the fixed cylinder is tilted, and the end away from the connecting pipe tilts downward, and the end of the annular tube away from the roller is fixedly connected with the feed port.

[0017] A method for recovering waste heat from cooling slag, comprising the following steps:

[0018] Step 1: The air inlet pipe conveys air flow into the distribution hood, and the molten slag from the converter enters the annular tube. The annular tube rotates, and the molten slag is thrown out along the first distribution trough toward the inner wall of the drum. Part of the molten slag forms slag in the air flow. At the same time, the drum rotates. With the cooperation of the driving mechanism, a plurality of first clappers reciprocate to slap the molten slag and the formed slag, and the molten slag and the formed slag are slapped into broken slag.

[0019] Step 2: The slag enters the bell-shaped lifting cover, which rotates, and the slag is lifted along the second distribution trough toward the axis of the drum, and then the slag is thrown toward the second beating plate, which rotates and continues to beat the slag to further break it.

[0020] Step 3: The flow hood sends air into the drum, and the air flow continuously takes away the heat in the lifted and crushed slag. The hot air flow enters the annular tube and the annular wind collecting hood in turn, and then enters the heat exchanger;

[0021] Step 4: The water inlet pipe sends cooling water into the heat absorption pipe, and the steel slag enters the fixed cylinder through the connecting pipe. The heat absorption pipe rotates, and the spiral part rotates to push the steel slag toward the discharge port. At the same time, the cross circuitous part rotates to continuously turn the steel slag in the fixed cylinder. The heat in the steel slag is transferred to the heat absorption pipe, and then absorbed by the heat absorption pipe. The water after absorbing heat is discharged from the water outlet pipe into the water collecting cover;

[0022] Step 5: The water in the water collecting hood enters the heat exchanger to absorb the heat in the hot air sent into the heat exchanger by the drum. The hot water is used for life and production, realizing the recovery and utilization of waste heat.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention provides hot air to the heat exchanger through the air-cooled slag-forming mechanism, and the waste heat transfer mechanism supplies water to the heat exchanger. The water in the heat exchanger is used to absorb the heat in the hot air to realize the recovery and utilization of the waste heat of the molten slag.

[0025] 2. The present invention, through the rotation of the drum, enables the first clapper to continuously clap the molten steel slag and steel slag that are raised, and claps the molten steel slag and steel slag into broken slag, so that the heat can be quickly taken away by the airflow.

[0026] 3. In the present invention, the annular tube rotates, and the molten slag is thrown out along the first distribution groove toward the inner wall of the drum, so that the distribution is uniform.

[0027] 4. In the present invention, the steel slag is lifted up along the second distribution trough toward the axial direction of the drum through the rotation of the trumpet-shaped lifting cover, and the steel slag is thrown toward the direction of the second beating plate. The second beating plate rotates and continues to beat the steel slag to further break the steel slag. At the same time, the lifted steel slag can quickly dissipate heat in the airflow.

[0028] 5. The present invention pushes the steel slag toward the discharge port by the rotation of the spiral part, and at the same time, the rotation of the cross circuitous part continuously turns the steel slag in the fixed cylinder, and the heat in the steel slag is transferred to the heat absorption tube, and then absorbed by the heat absorption tube. The heat absorption tube plays the role of pushing the steel slag, turning the steel slag and absorbing heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the driving mechanism of the present invention;

[0032] Figure 3 It is a schematic diagram of the internal structure of the air-cooled slag-forming mechanism of the present invention;

[0033] Figure 4 It is a structural schematic diagram of the annular tube of the present invention;

[0034] Figure 5 It is a structural schematic diagram of the trumpet-shaped lifting cover of the present invention;

[0035] Figure 6 It is a structural schematic diagram of the second beating board of the present invention;

[0036] Figure 7 It is a structural schematic diagram of the tail portion of the residual heat transfer mechanism of the present invention;

[0037] Figure 8It is a schematic structural diagram of the partition of the present invention;

[0038] Fig. 9 It is a schematic structural diagram of the heat absorption tube of the present invention;

[0039] Fig.10 It is a schematic diagram of the heat absorption tube reinforcement structure of the present invention.

[0040] In the figure: 1, support frame; 2, air-cooled slagging mechanism; 3, residual heat transfer mechanism; 4, heat exchanger; 5, connecting pipe; 6, feed port; 101, base; 102, first support seat; 103, second support seat; 201, roller; 202, annular pipe; 2021, first through hole; 2022, second through hole; 2023, trumpet-shaped protective cover; 2024, first distribution trough; 203, annular wind collecting cover; 2031, Exhaust interface; 204, rotating shaft; 205, first clapper; 206, driving mechanism; 2061, first rectangular plate; 2062, second rectangular plate; 2063, arc rod; 2064, movable plate; 2065, spring; 2066, paddle; 2067, fixed rod; 2068, annular plate; 2069, U-shaped frame; 2060, roller; 207, trumpet-shaped lifting cover; 2071, second material distributing slot; 20 8. second flapping plate; 209. flow cover; 210. air inlet pipe; 211. first motor; 212. driving gear; 213. gear ring; 214. fan; 215. connecting rod; 216. first driven pulley; 217. second motor; 218. first driving pulley; 219. first belt; 220. cover; 301. fixing cylinder; 302. heat absorbing tube; 3021. cross detour; 3022. Spiral portion; 3023, L-shaped connecting portion; 303, water inlet pipe; 304, water outlet pipe; 305, partition; 306, discharge port; 307, water collecting cover; 308, third motor; 309, second driving pulley; 310, second driven pulley; 311, second belt; 312, water inlet interface; 313, water outlet interface; 61, first reinforcing rod; 62, circular block; 63, second reinforcing rod; 64, third reinforcing rod. DETAILED DESCRIPTION

[0041] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0042] See also Figures 1 to 10. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0043] The present invention provides a technical solution: a steel slag cooling waste heat recovery device, comprising a support frame 1, on which are mounted an air-cooled slag-forming mechanism 2, a waste heat transfer mechanism 3 and a heat exchanger 4, the air-cooled slag-forming mechanism 2 is connected to the air outlet end of the heat exchanger 4 to provide hot air to the heat exchanger 4; the waste heat transfer mechanism 3 is connected to the water inlet end of the heat exchanger 4 to supply water to the heat exchanger 4, and the water in the heat exchanger 4 is used to absorb heat in the hot air to achieve waste heat recovery.

[0044] In another embodiment, a plurality of heat exchangers may be arranged at the rear end of the heat exchanger 4 to fully absorb the heat in the airflow.

[0045] If the water temperature provided by the waste heat transfer mechanism 3 is too high, the heat exchanger 4 can be connected to cooling water separately.

[0046] The air-cooled slag-forming mechanism 2 includes a drum 201, one end of which is fixedly connected to an annular tube 202, the interior of the annular tube 202 is connected to the interior of the drum 201, and the outer wall of the annular tube 202 is rotatably sleeved with an annular wind collecting hood 203 connected to the interior thereof, and the drum 201, the annular tube 202 and the annular wind collecting hood 203 are all made of heat-insulating materials.

[0047] The airflow in the drum 201 can enter the annular tube 202 and then enter the annular air collecting hood 203 .

[0048] The inner wall of the drum 201 is installed with a plurality of rotating shafts 204 arranged in a circular array, the outer wall of the rotating shaft 204 is fixedly connected with a plurality of first clapping plates 205, the annular tube 202 and the annular wind collecting cover 203 are installed with a driving mechanism 206 which can drive the plurality of first clapping plates 205 to reciprocate and clap by the rotation of the drum 201, the inner wall of the drum 201 is fixedly connected with a trumpet-shaped lifting cover 207, and a rotatable second clapping plate 208 is installed at the axis of the drum 201 for clapping the materials lifted at the smaller diameter of the trumpet-shaped lifting cover 207; the outer wall of the rear part of the drum 201 is rotatably sleeved with a cover 220, and the inner wall of the port of the trumpet-shaped lifting cover 207 facing the cover 220 is arranged with an inclined surface for guiding the airflow to the smaller diameter of the trumpet-shaped lifting cover 207; A rotatable flow distribution hood 209 is installed at the center of the drum 201 near the tail, and one end of the flow distribution hood 209 facing the annular tube 202 is set with a conical surface, which is used to spread airflow to the inside of the drum 201; the rotation of the flow distribution hood 209 can drive the second flapping plate 208 to rotate; one end of the flow distribution hood 209 is connected to the air inlet pipe 210, and the air inlet pipe 210 rotates through the cover 220 and extends to the outside; the inner wall of the annular tube 202 is provided with a first distribution groove 2024 arranged in an annular array, and the first distribution groove 2024 is arranged in an inclined arc along the inner wall of the annular tube 202; the inner wall of the trumpet-shaped lifting cover 207 is provided with a second distribution groove 2071 arranged in an annular array, and the second distribution groove 2071 is arranged in an inclined arc along the inner wall of the trumpet-shaped lifting cover 207.

[0049] The waste heat transfer mechanism 3 includes a fixed cylinder 301, in which a rotatable heat absorption tube 302 is installed. One end of the heat absorption tube 302 is connected to a water inlet pipe 303, and the other end of the heat absorption tube 302 is connected to a water outlet pipe 304. The inner wall of the tail of the fixed cylinder 301 is rotatably sleeved with a partition 305, and the connection between the partition 305 and the fixed cylinder 301 is a sealed connection. The water inlet pipe 303 is fixedly passed through the axis of the partition 305, and the water outlet pipe 304 is fixedly passed through the partition 305; the outer wall of the fixed cylinder 301 located below is fixedly connected with a discharge port 306 connected to the interior thereof; the outer wall of the tail of the fixed cylinder 301 is fixedly sleeved with a water collecting cover 307, and the water inlet pipe 303 is rotatably passed through the axis of the water collecting cover 307 and extends to the outside; the water outlet pipe 304 extends between the partition 305 and the water collecting cover 307; the heat absorption tube 302 can rotate synchronously with the partition 305.

[0050] The water inlet pipe 303 is connected to a water pump, and the water pumped by the water pump can be water at room temperature or groundwater at a relatively low temperature.

[0051] The side wall of the cover 220 is connected with a connecting pipe 5 which is connected with the inside of the drum 201 and is tilted downward. The connecting pipe 5 is fixed through one end of the fixed cylinder 301 and is used to transport materials to the fixed cylinder 301 .

[0052] The heat absorption tube 302 is arranged in a flat shape and includes a cross detour portion 3021 and a spiral portion 3022. The end of the spiral portion 3022 close to the connecting pipe 5 is connected to an L-shaped connecting portion 3023 bent toward the inside of the spiral portion 3022. The L-shaped connecting portion 3023 is connected to one end of the cross detour portion 3021. The cross detour portion 3021 is arranged inside the spiral portion 3022. The end of the cross detour portion 3021 away from the L-shaped connecting portion 3023 is connected to the water inlet pipe 303. The end of the spiral portion 3022 away from the L-shaped connecting portion 3023 is connected to the water outlet pipe 304. The outer wall of the spiral portion 3022 is slidably connected to the inner wall of the fixed tube 301.

[0053] One end of the connecting tube 5 located inside the fixing tube 301 can extend to the center of the spiral portion 3022 . The L-shaped connecting portion 3023 is provided to prevent the cross detour portion 3021 from interfering with the connecting tube 5 .

[0054] The support frame 1 includes a base 101, and the top surface of the base 101 is fixedly connected to two first support seats 102 and two second support seats 103. The tops of the two first support seats 102 are fixedly connected to the annular wind collecting hood 203 and the cover 220 respectively; the tops of the two second support seats 103 are fixedly connected to the fixed cylinder 301.

[0055] A first motor 211 is fixedly mounted on the first support seat 102 , and a driving gear 212 is axially connected to an output end of the first motor 211 . A gear ring 213 meshing with the driving gear 212 is fixedly sleeved on an outer wall of the drum 201 .

[0056] The first motor 211 can drive the gear ring 213 to rotate via the driving gear 212 , so that the drum 201 rotates.

[0057] The driving mechanism 206 includes a first rectangular plate 2061 and a second rectangular plate 2062 fixedly arranged at the ends of the annular tube 202, and an arc rod 2063 is fixedly connected to the first rectangular plate 2061 and the second rectangular plate 2062, and the center of the arc rod 2063 coincides with the axis of the rotating shaft 204, and the outer wall of the arc rod 2063 is slidably sleeved with a movable plate 2064, and the movable plate 2064 is fixedly connected to the rotating shaft 204, and the outer wall of the arc rod 2063 is sleeved with a movable plate 2064 The spring 2065 is pressed tightly, and the driving mechanism 206 also includes a shift plate 2066 fixedly set on the outer wall of the rotating shaft 204. The driving mechanism 206 also includes a fixed rod 2067 fixedly connected to the annular wind collecting cover 203, and an annular plate 2068 is fixedly connected to the fixed rod 2067. The inner wall of the annular plate 2068 is fixedly connected to a plurality of U-shaped frames 2069 arranged in a circular array, and the inner wall axis of the U-shaped frame 2069 is connected to a roller 2060 that cooperates with the shift plate 2066 as a blocking connection.

[0058] When the drum 201 rotates and the paddle 2066 rotates in a circular trajectory, the roller 2060 squeezes the paddle 2066. Under the action of squeezing, the movable plate 2064 slides on the arc rod 2063, squeezing the spring 2065, and the shaft 204 rotates. After the roller 2060 is separated from the paddle 2066, the shaft 204 rotates under the action of the spring 2065 on the movable plate 2064. When the drum 201 rotates, the driving mechanism 206 can drive the shaft 204 to rotate back and forth, and the first clapping plates 205 realize a reciprocating clapping action.

[0059] The rotating shaft 204 rotates and passes through the two ends of the annular tube 202. The inner wall of the drum 201 is provided with an inlay groove, and the rotating shaft 204 is rotatably embedded in the inlay groove. The outer wall of the annular air collecting hood 203 is provided with a plurality of first through holes 2021. The inner wall of the annular air collecting hood 203 is open. The first through holes 2021 are located inside the annular air collecting hood 203. A plurality of second through holes 2022 are provided at one end of the annular tube 202 located inside the drum 201. A trumpet-shaped protective cover 2023 is fixedly connected to the port of the annular tube 202 located inside the drum 201. A plurality of second through holes 2022 are located on the rear side of the trumpet-shaped protective cover 2023. The outer wall of the annular air collecting hood 203 is connected with an exhaust interface 2031 communicated with the interior thereof, and the exhaust interface 2031 is connected to the air outlet end of the heat exchanger 4.

[0060] The airflow in the drum 201 enters the annular tube 202 through the second through hole 2022 , and then enters the annular air collecting cover 203 through the first through hole 2021 , and then enters the heat exchanger 4 from the exhaust port 2031 .

[0061] The trumpet-shaped protective cover 2023 is used to protect the second through hole 2022 to prevent steel slag from entering.

[0062] A fan 214 is fixedly mounted on the cover 220 to provide airflow. The inner wall of the air outlet of the fan 214 is rotatably sleeved on the outer wall at the port of the air inlet pipe 210. The side of the flow distribution cover 209 facing the annular pipe 202 is a conical surface, and a plurality of air outlet holes are opened on the conical surface. A connecting rod 215 is fixedly connected to the center of the flow distribution cover 209. The outer wall of the connecting rod 215 is fixedly connected to the second flapping plate 208. The small end of the trumpet-shaped lifting cover 207 is set toward the cover 220. The outer wall of the air inlet pipe 210 is fixedly sleeved with a first driven pulley 216. A second motor 217 is fixedly mounted on the cover 220. The output end of the second motor 217 is connected to a first driving pulley 218. The first driving pulley 218 and the first driven pulley 216 are driven by a first belt 219.

[0063] The second motor 217 drives the first driven pulley 216 to rotate, and the air inlet pipe 210 drives the flow distribution cover 209 and the second flapping plate 208 to rotate, and the flow distribution cover 209 rotates, so that the airflow is spirally spread.

[0064] A third motor 308 is fixedly installed on the water collecting cover 307, and the output end shaft of the third motor 308 is connected to the second driving pulley 309, and the outer wall of the water inlet pipe 303 is fixedly sleeved with the second driven pulley 310, and the second driving pulley 309 and the second driven pulley 310 are driven by a second belt 311. A water inlet interface 312 is fixedly installed on the water collecting cover 307, and the inner wall of the water inlet interface 312 is rotatably sleeved on the outer wall at the end of the water inlet pipe 303, and the outer wall below the water collecting cover 307 is fixedly connected to a water outlet interface 313 connected to the interior thereof, and the water outlet interface 313 is connected to the water inlet end of the heat exchanger 4.

[0065] The water inlet pipe 303 is connected to the water pump via the water inlet interface 312 , and the water inlet pipe 303 can rotate on the water inlet interface 312 .

[0066] The third motor 308 can drive the second driven pulley 310 to rotate, so that the water inlet pipe 303 rotates, and the partition plate 305 rotates accordingly.

[0067] Four first reinforcing rods 61 are fixedly connected to the end of the water inlet pipe 303, and the outer wall of the first reinforcing rods 61 is fixedly connected to the turning point of the cross detour part 3021. The four first reinforcing rods 61 are fixedly connected to a circular block 62 at one end away from the water inlet pipe 303, and a plurality of second reinforcing rods 63 are fixedly connected to the inner wall of the spiral part 3022. A plurality of third reinforcing rods 64 are fixedly connected to the outer wall of the second reinforcing rods 63, and the end of the third reinforcing rods 64 away from the second reinforcing rods 63 is fixedly connected to the cross detour part 3021.

[0068] The roller 201 is tilted, and the end close to the connecting pipe 5 tilts downward; the fixed cylinder 301 is tilted, and the end away from the connecting pipe 5 tilts downward, and the end of the annular tube 202 away from the roller 201 is fixedly connected to the feed port 6.

[0069] The outer wall of the feed port for providing molten slag from the converter is rotatably sleeved on the inner wall of the feed port 6 .

[0070] The specific workflow of the present invention is as follows:

[0071] Preparation stage:

[0072] Start the device to ensure that the fan 214, the first motor 211, the second motor 217, the third motor 308 and other devices are in normal working condition.

[0073] The water inlet pipe 303 is connected to a water source to supply water to the heat absorption pipe 302 .

[0074] One end of the annular pipe 202 away from the drum 201 is connected to the feed port 6, ready to receive the molten slag from the converter.

[0075] The heat exchanger 4 is ready to receive hot air and hot water for waste heat recovery.

[0076] Initial slag treatment stage:

[0077] The molten slag from the converter enters the annular tube 202 , which is driven to rotate by the first motor 211 through the cooperation of the driving gear 212 and the gear ring 213 , and the molten slag is thrown out along the first distribution trough 2024 toward the inner wall of the drum 201 .

[0078] At the same time, the drum 201 rotates, and under the action of the driving mechanism 206, a plurality of first clappers 205 reciprocately slap the molten slag and the preliminarily formed slag, and slap the molten steel and the formed slag into broken slag.

[0079] The working principle of the driving mechanism 206 is as follows: the fixed rod 2067 on the annular wind collecting hood 203 and the U-shaped frame 2069 on the inner wall of the annular plate 2068 rotate with the annular wind collecting hood 203, and the roller 2060 axially connected to the inner wall of the U-shaped frame 2069 is engaged with the paddle 2066 on the outer wall of the rotating shaft 204, and the movable plate 2064 is driven by the rotating shaft 204 to slide along the arc rod 2063 and compress the spring 2065. After the roller 2060 is separated from the paddle 2066, the rotating shaft 204 rotates and resets under the action of the spring 2065, thereby realizing the reciprocating motion of the first clapper 205.

[0080] Further processing stages of slag:

[0081] The steel slag enters the trumpet-shaped lifting cover 207, which rotates driven by the drum 201, and the steel slag is lifted along the second distribution trough 2071 toward the axial direction of the drum 201, and the steel slag is thrown toward the second beating plate 208. The second beating plate 208 rotates driven by the distribution cover 209 through the connecting rod 215, and continues to beat the steel slag to further break it.

[0082] Hot air generation and delivery stage:

[0083] The second motor 217 is transmitted to the air inlet pipe 210 through the first driving pulley 218, the first belt 219, and the first driven pulley 216, and the flow distribution hood 209 rotates. At the same time, the air inlet pipe 210 receives the airflow delivered by the fan 214, so that the airflow is spirally spread out; the airflow continuously takes away the heat in the raised and broken slag, and the hot air flow enters the annular pipe 202 and the annular wind collecting hood 203 in turn, and then enters the heat exchanger 4 through the exhaust interface 2031.

[0084] Slag treatment stages in the waste heat transfer mechanism 3:

[0085] The steel slag enters the fixed cylinder 301 through the connecting pipe 5, and the third motor 308 is transmitted to the water inlet pipe 303 through the second driving pulley 309, the second belt 311, and the second driven pulley 310, so that the water inlet pipe 303 rotates, thereby driving the heat absorption tube 302 to rotate.

[0086] The spiral portion 3022 rotates to push the steel slag toward the discharge port 306 , and at the same time, the rotation of the cross detour portion 3021 continuously turns the steel slag in the fixed cylinder 301 , and the heat in the steel slag is transferred to the heat absorption tube 302 .

[0087] Waste heat recovery stage:

[0088] The water after absorbing heat is discharged from the water outlet pipe 304 into the water collecting cover 307 , and then the water in the water collecting cover 307 enters the heat exchanger 4 through the water outlet interface 313 .

[0089] The heat exchanger 4 receives hot air from the drum 201 and hot water from the water collecting cover 307 at the same time, and the water absorbs the heat in the hot air to realize the recovery and utilization of waste heat.

[0090] A method for recovering waste heat from cooling slag, comprising the following steps:

[0091] Step 1, start the fan 214, the air inlet pipe 210 conveys air flow to the distribution cover 209, the molten slag from the converter enters the annular tube 202, the annular tube 202 rotates, the molten slag is thrown out along the first distribution trough 2024 toward the inner wall of the drum 201, and part of the molten slag forms slag in the air flow. At the same time, the drum 201 rotates, and with the cooperation of the driving mechanism 206, a plurality of first clappers 205 reciprocate to slap the molten slag and the formed slag, and the molten slag and the formed slag are slapped into broken slag;

[0092] Step 2: The steel slag enters the bell-shaped lifting cover 207, which rotates, and the steel slag is lifted along the second distribution trough 2071 toward the axis of the drum 201, and the steel slag is thrown toward the second beating plate 208, and the second beating plate 208 rotates and continues to beat the steel slag to further break the steel slag;

[0093] Step 3: The flow distribution hood 209 sends airflow into the drum 201, and the airflow continuously takes away the heat in the lifted and crushed slag. The hot airflow enters the annular pipe 202 and the annular air collecting hood 203 in sequence, and then enters the heat exchanger 4;

[0094] Step 4: The water inlet pipe 303 feeds cooling water into the heat absorption tube 302, and the steel slag enters the fixed cylinder 301 through the connecting pipe 5. The heat absorption tube 302 rotates, and the spiral part 3022 rotates to push the steel slag toward the discharge port 306. At the same time, the cross circuitous part 3021 rotates to continuously turn over the steel slag in the fixed cylinder 301. The heat in the steel slag is transferred to the heat absorption tube 302, and then absorbed by the heat absorption tube 302. The water after absorbing heat is discharged from the water outlet pipe 304 into the water collecting cover 307.

[0095] Step 5: The water in the water collecting cover 307 enters the heat exchanger 4 to absorb the heat in the hot air sent into the heat exchanger 4 by the drum 201. The hot water is used for life and production, realizing the recovery and utilization of waste heat.

[0096] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A slag cooling waste heat recovery device, comprising a support frame (1), characterized in that: The support frame (1) is provided with an air-cooled slag-forming mechanism (2), a waste heat transfer mechanism (3) and a heat exchanger (4); the air-cooled slag-forming mechanism (2) is connected to the air outlet end of the heat exchanger (4) and is used to provide hot air to the heat exchanger (4); the waste heat transfer mechanism (3) is connected to the water inlet end of the heat exchanger (4) and is used to supply water to the heat exchanger (4); the water in the heat exchanger (4) is used to absorb heat in the hot air, so as to realize the recovery and utilization of waste heat; The air-cooled slag-forming mechanism (2) comprises a drum (201), the drum (201) being driven by a first motor (211) mounted on a support frame (1), one end of the drum (201) being fixedly connected to an annular tube (202), an annular wind collecting hood (203) being rotatably sleeved on the outer wall of the annular tube (202), a plurality of first clappers (205) being mounted on the inner wall of the drum (201), the plurality of first clappers (205) being driven by a driving mechanism (206), a trumpet-shaped lifting hood (207) being fixedly connected to the inner wall of the drum (201), a smaller-diameter port of the trumpet-shaped lifting hood (207) being mounted a second flapping plate (208); a cover (220) is rotatably sleeved on the outer wall of the rear end of the drum (201); a flow distribution hood (209) is installed in the drum (201); a fan (214) for supplying airflow into the flow distribution hood (209) is installed on the cover (220); the second flapping plate (208) and the flow distribution hood (209) are driven to rotate by a second motor (217) installed on the cover (220); a first material distribution groove (2024) arranged in a circular array is provided on the inner wall of the annular tube (202); and a second material distribution groove (2071) arranged in a circular array is provided on the inner wall of the bell-shaped lifting hood (207); The waste heat transfer mechanism (3) comprises a fixed cylinder (301), a heat absorption tube (302) is installed in the fixed cylinder (301), two ends of the heat absorption tube (302) are respectively connected to a water inlet pipe (303) and a water outlet pipe (304), a discharge port (306) is arranged below the fixed cylinder (301), a partition plate (305) is rotatably sleeved on the inner wall of the rear end of the fixed cylinder (301), and a water collecting cover (307) is fixedly sleeved on the outer wall of the rear end of the fixed cylinder (301). The water inlet pipe (303) is fixedly passed through the axis of the partition (305) and the water collecting cover (307) in sequence; the water outlet pipe (304) is fixedly passed through the partition (305); a third motor (308) for driving the water inlet pipe (303) is fixedly mounted on the water collecting cover (307); the heat absorption tube (302) is flat, and comprises a cross detour portion (3021) and a spiral portion (3022); the outer wall of the spiral portion (3022) is slidably connected to the inner wall of the fixed cylinder (301); The drum (201) and the fixed drum (301) are connected via a connecting pipe (5); The output end of the first motor (211) is axially connected to a driving gear (212); the outer wall of the drum (201) is fixedly sleeved with a gear ring (213) meshing with the driving gear (212); the interior of the annular tube (202) is respectively connected to the interior of the drum (201) and the annular air collecting hood (203); the inner wall of the drum (201) is provided with a plurality of rotating shafts (204) arranged in an annular array; the outer wall of the rotating shaft (204) is fixedly connected to a plurality of first clappers (205); the rotating shaft (204) rotates through the two ends of the annular tube (202); the inner wall of the drum (201) is provided with an inlay groove; the rotating shaft (204) is rotatably inlaid in the inlay groove; the annular air collecting hood (203) is provided with a plurality of rotating shafts (204) arranged in an annular array; the outer wall of the rotating shaft (204) is fixedly connected to a plurality of first clappers (205); the rotating shaft (204) rotates to pass through the two ends of the annular tube (202); an inlay groove is provided on the inner wall of the drum (201); the rotating shaft (204) is rotatably inlaid in the inlay groove; the annular air collecting hood (203) is provided with a plurality of rotating shafts (204) arranged in an annular array; the rotating shaft (204) is fixedly connected to the plurality of first clappers (205); the rotating shaft (204) rotates to pass through the two ends of the annular tube (202); The outer wall is provided with a plurality of first through holes (2021); the inner wall of the annular air collecting hood (203) is open, the first through holes (2021) are located inside the annular air collecting hood (203); one end of the annular tube (202) located inside the drum (201) is provided with a plurality of second through holes (2022); a horn-shaped protective cover (2023) is fixedly connected to the port of the annular tube (202) located inside the drum (201); the plurality of second through holes (2022) are located at the rear side of the horn-shaped protective cover (2023); the outer wall of the annular air collecting hood (203) is connected with an exhaust interface (2031) communicating with the interior thereof; the exhaust interface (2031) is connected to the air outlet end of the heat exchanger (4); The driving mechanism (206) comprises a first rectangular plate (2061) and a second rectangular plate (2062) fixedly arranged at the end of the annular tube (202); an arc-shaped rod (2063) is fixedly connected to the first rectangular plate (2061) and the second rectangular plate (2062); the center of the arc-shaped rod (2063) coincides with the axis of the rotating shaft (204); a movable plate (2064) is slidably sleeved on the outer wall of the arc-shaped rod (2063); the movable plate (2064) is fixedly connected to the rotating shaft (204); and the outer wall of the arc-shaped rod (2063) is sleeved with a movable plate (2064) that is slidably sleeved with the movable plate (2064). ) is pressed against a spring (2065), the driving mechanism (206) further comprising a shifting plate (2066) fixedly arranged on the outer wall of the rotating shaft (204), the driving mechanism (206) further comprising a fixing rod (2067) fixedly connected to the annular wind collecting cover (203), an annular plate (2068) being fixedly connected to the fixing rod (2067), a plurality of U-shaped frames (2069) arranged in an annular array being fixedly connected to the inner wall of the annular plate (2068), and a roller (2060) which is engaged with the shifting plate (2066) in a blocking manner being axially connected to the inner wall of the U-shaped frame (2069); The flow distribution hood (209) is installed at the center of the rear of the drum (201) and is used to distribute airflow to the inside of the drum (201); one end of the flow distribution hood (209) is connected to an air inlet pipe (210), and the air inlet pipe (210) rotates through the cover (220) and extends to the outside; the inner wall of the air outlet of the fan (214) is rotatably sleeved on the outer wall of the air inlet pipe (210) at the end thereof; the side of the flow distribution hood (209) facing the annular tube (202) is provided with a conical surface, and a plurality of air outlet holes are provided on the conical surface; a connecting rod (215) is fixedly connected to the center of the flow distribution hood (209), and the outer wall of the connecting rod (215) is connected to the annular tube (202) and the inner ... The second flapping plate (208) is fixedly connected, and the small end of the trumpet-shaped lifting cover (207) is arranged in the direction of the sealing cover (220); the outer wall of the air inlet pipe (210) is fixedly sleeved with a first driven pulley (216), the output end shaft of the second motor (217) is connected to a first driving pulley (218), and the first driving pulley (218) and the first driven pulley (216) are driven by a first belt (219); the first material distribution groove (2024) is arranged in an inclined arc along the inner wall of the annular tube (202); and the second material distribution groove (2071) is arranged in an inclined arc along the inner wall of the trumpet-shaped lifting cover (207); The discharge port (306) is fixedly arranged on the outer wall below the fixed cylinder (301) and is in communication with the interior thereof; the output end shaft of the third motor (308) is connected to a second driving pulley (309); the outer wall of the water inlet pipe (303) located outside is fixedly sleeved with a second driven pulley (310); the second driving pulley (309) and the second driven pulley (310) are driven by a second belt (311); a water inlet interface (312) is fixedly mounted on the water collecting cover (307); the inner wall of the water inlet interface (312) is rotatably sleeved on the outer wall at the end of the water inlet pipe (303); the outer wall below the water collecting cover (307) is fixedly connected to a water outlet interface (313) in communication with the interior thereof; the water outlet interface (313) is connected to the water inlet end of the heat exchanger (4); and the water outlet end of the water outlet pipe (304) is located between the partition (305) and the water collecting cover (307); An end of the spiral portion (3022) close to the connecting pipe (5) is connected to an L-shaped connecting portion (3023) bent toward the inside of the spiral portion (3022); the L-shaped connecting portion (3023) is connected to one end of a cross detour portion (3021); the cross detour portion (3021) is arranged inside the spiral portion (3022); an end of the cross detour portion (3021) away from the L-shaped connecting portion (3023) is connected to a water inlet pipe (303); an end of the spiral portion (3022) away from the L-shaped connecting portion (3023) is connected to a water outlet pipe (304); the water inlet pipe (303) Four first reinforcing rods (61) are fixedly connected to the end of the spiral portion (3022); the outer wall of the first reinforcing rod (61) is fixedly connected to the turning point of the cross detour portion (3021); one end of the four first reinforcing rods (61) away from the water inlet pipe (303) is fixedly connected to a circular block (62); the inner side wall of the spiral portion (3022) is fixedly connected to a plurality of second reinforcing rods (63); the outer wall of the second reinforcing rod (63) is fixedly connected to a plurality of third reinforcing rods (64); one end of the third reinforcing rod (64) away from the second reinforcing rod (63) is fixedly connected to the cross detour portion (3021).

2. A slag cooling waste heat recovery device according to claim 1, characterized in that: The support frame (1) comprises a base (101); the top surface of the base (101) is fixedly connected to two first support seats (102) and two second support seats (103); the tops of the two first support seats (102) are fixedly connected to an annular air collecting hood (203) and a sealing cover (220), respectively; the tops of the two second support seats (103) are fixedly connected to a fixed cylinder (301); and the first motor (211) is fixedly mounted on the first support seat (102).

3. The slag cooling waste heat recovery device according to claim 1, characterized in that: The connecting tube (5) is fixedly installed on the side wall of the cover (220) at an angle downward, and is in communication with the interior of the drum (201); the connecting tube (5) is fixedly passed through one end of the fixed cylinder (301); the drum (201) is arranged at an angle, and the end close to the connecting tube (5) is inclined downward; the fixed cylinder (301) is arranged at an angle, and the end away from the connecting tube (5) is inclined downward; the end of the annular tube (202) away from the drum (201) is fixedly connected to a feed port (6).

4. A method for recovering waste heat from cooling slag, characterized in that: The steel slag cooling waste heat recovery device according to any one of claims 1 to 3 comprises the following steps: Step 1, starting the fan (214) to convey airflow into the distribution hood (209), so that the molten slag from the converter enters the annular tube (202), the annular tube (202) rotates, and the molten slag is thrown out along the first distribution trough (2024) toward the inner wall of the drum (201) around the drum, and part of the molten slag forms slag in the airflow. At the same time, the drum (201) rotates, and with the cooperation of the driving mechanism (206), a plurality of first clappers (205) reciprocate to clap the molten slag and the formed slag, so that the molten steel and the formed slag are clapped into broken slag; Step 2: the steel slag enters the trumpet-shaped lifting cover (207), the trumpet-shaped lifting cover (207) rotates, the steel slag is lifted along the second material distribution trough (2071) toward the axis of the drum (201), and the steel slag is thrown toward the second beating plate (208), and the second motor (217) drives the second beating plate (208) to rotate and continue to beat the steel slag, thereby further breaking the steel slag; Step 3: The flow distribution hood (209) sends airflow into the drum (201), and the airflow continuously takes away the heat in the lifted and crushed steel slag. The hot airflow enters the annular tube (202) and the annular air collecting hood (203) in sequence, and then enters the heat exchanger (4); Step 4: The water inlet pipe (303) feeds cooling water into the heat absorption pipe (302), and the steel slag enters the fixed cylinder (301) through the connecting pipe (5). The heat absorption pipe (302) rotates, and the spiral portion (3022) rotates to push the steel slag toward the discharge port (306). At the same time, the cross detour portion (3021) rotates to continuously turn over the steel slag in the fixed cylinder (301). The heat in the steel slag is transferred to the heat absorption pipe (302), and then absorbed by the heat absorption pipe (302). The water after absorbing the heat is discharged from the water outlet pipe (304) and enters the water collecting cover (307); In step five, the water in the water collecting cover (307) enters the heat exchanger (4) to absorb the heat in the hot air sent into the heat exchanger (4) by the drum (201), thereby realizing the recovery and utilization of waste heat.

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