Waste heat recovery device for steel rolling cooling bed

Abstract

The utility model discloses a waste heat recovery device for a steel rolling cooling bed. The waste heat recovery device comprises an air blower, an upper housing, a lower housing, a first connecting assembly, a hose, a second connecting assembly and a heat exchanger, a lower cover shell is arranged under the cooling bed, an upper cover shell is arranged over the cooling bed, a hollow area is defined by the upper cover shell and the lower cover shell, and the cooling bed is wrapped in the hollow area. A first connecting assembly is arranged at the top of the upper housing, one end of the hose is hermetically communicated with the interior of the housing through the first connecting assembly, and the other end of the hose is hermetically communicated with a channel of the heat exchanger through a second connecting assembly; the air blower communicates with the interior of the lower housing in a sealed mode through the bottom of the lower housing through a pipeline and blows cold air into the position below the cooling bed in a circulating mode, the cold air exchanges heat with high-temperature steel on the cooling bed to be heated, then enters the heat exchanger through the hose and exchanges heat with cooling water in the other channel of the heat exchanger, and then waste heat recovery is conducted. The environment temperature of the cooling bed is reduced, and waste heat is effectively recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of steelmaking, in particular to a steel rolling cooling bed waste heat recovery device. Background Art

[0002] The cooling bed is one of the indispensable auxiliary equipment in the steel rolling workshop. Generally, the steel rolled by the rolling mill is transported and unloaded on the cooling bed for cooling, so that its temperature drops from about 900℃ to 100-300℃. However, during the cooling process, a large amount of heat is lost and cannot be utilized. In addition, the temperature on the cooling bed is too high, which will also affect the safety of maintenance personnel. Therefore, the above problems need to be solved urgently. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a steel rolling cooling bed waste heat recovery device, which can not only effectively reduce the cooling bed ambient temperature, but also effectively recover and utilize the waste heat of steel on the cooling bed, thereby achieving energy saving and emission reduction.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a waste heat recovery device for a steel rolling cooling bed of the utility model, the innovation of which is that it includes a blower, an upper cover shell, a lower cover shell, a first connecting component, a hose, a second connecting component and a heat exchanger; a lower cover shell is horizontally spaced apart directly below the cooling bed, and an upper cover shell is horizontally spaced apart directly above it, the upper cover shell and the lower cover shell enclose a hollow area, and the cooling bed is covered therein; a first connecting component is provided on the top of the upper cover shell, and one end of the hose is sealed and screwed with the first connecting component, and is connected to the interior of the cover shell through the first connecting component, and the other end of the hose is sealed and connected to a channel of the heat exchanger through the second connecting component; the blower is sealed and connected to the interior of the lower cover shell through the bottom of the lower cover shell through a pipeline, and circulates cold air to the bottom of the cooling bed, and after the cold air exchanges heat with the high-temperature steel on the cooling bed to heat up, it enters the heat exchanger through the hose, exchanges heat with the cooling water in another channel of the heat exchanger, and then recovers waste heat.

[0005] Preferably, the upper cover shell and the lower cover shell are both semicircular arc structures, and are symmetrically arranged up and down, and do not interfere with the cooling operation of the steel on the cooling bed.

[0006] Preferably, it also includes a guide rail chain assembly and a support bracket; a support bracket is provided on one side of the cooling bed, and the support bracket does not interfere with the action of conveying high-temperature steel to the cooling bed; a guide rail chain assembly is also horizontally provided at the top of the support bracket, and the upper cover shell is driven to move horizontally by the guide rail chain assembly, thereby providing space for maintenance of the cooling bed.

[0007] Preferably, the heat exchanger comprises a heat exchange box, a water tank, a recovery box, a water pump, a fixed plate and a heat exchange tube; the heat exchange box is a vertically arranged hollow rectangular structure, and is arranged on one side of the cooling bed, and is arranged respectively without interfering with the guide rail chain assembly and the support bracket; fixed plates are also arranged in parallel and at intervals in the heat exchange box at left and right symmetry, each of which is a rectangular structure matching the interior of the heat exchange box, and is arranged vertically and longitudinally, and is respectively fixedly connected to the front and rear inner sides of the heat exchange box; a plurality of heat exchange tubes are also arranged horizontally and parallelly from top to bottom in sequence in the interior of the heat exchange box relative to the two fixed plates, and each of the heat exchange tubes is arranged horizontally and parallelly from top to bottom in sequence, They are all hollow flat rectangular structures arranged horizontally, and their left and right ends respectively extend vertically from the corresponding fixed plates, and the adjacent ends of each upper and lower adjacent heat exchange tubes are respectively staggered and sealed and connected, and are formed as a whole to form a vertically arranged meandering structure; the right end of the bottom heat exchange tube extends horizontally to the right from the right side surface of the heat exchange box, and is sealed and connected to the water tank through a water pump, and then cooling water is provided to the heat exchange tube through the water tank; the right end of the top heat exchange tube extends horizontally to the right from the right side surface of the heat exchange box, and is sealed and connected to the recovery box, and then the cooling water after heat exchange and heating is collected in the recovery box.

[0008] Preferably, the second connecting component is vertically arranged on the right side of the upper surface of the heat exchanger box, and the other end of the hose is sealed and screwed to the second connecting component and communicated with the interior of the heat exchanger box through the second connecting component, thereby transporting the heated air into the heat exchanger box for heat exchange with the cooling water in the heat exchange tube; an exhaust pipe is also vertically arranged on the left side of the heat exchanger box near its bottom end, and the exhaust pipe is sealed and connected to the interior of the heat exchanger box, thereby discharging the cooled air.

[0009] Preferably, a plurality of spoiler blocks are sequentially arranged at intervals inside each of the heat exchange tubes along its length direction, each of the spoiler blocks is arranged horizontally and longitudinally, and is a rectangular structure that matches the interior of the corresponding heat exchange tube; the width of each spoiler block is two-thirds of the width of the interior of the corresponding heat exchange tube, and adjacent spoiler blocks are arranged at intervals with an offset up and down motion, and are respectively fixedly connected to the corresponding inner walls of the corresponding heat exchange tubes, thereby reducing the flow rate of cooling water in the heat exchange tubes through the spoiler blocks.

[0010] Preferably, the first connecting assembly and the second connecting assembly have the same structure, and the second connecting assembly includes a locking nut, a rubber plug, a connecting pipe and a conical locking mechanism; the connecting pipe is a vertically arranged hollow cylindrical structure, and its lower end is embedded and fixedly connected with the upper surface of the heat exchange box at the right end, and is sealed and connected with the interior of the heat exchange box; a conical locking mechanism is also vertically provided on the upper end surface of the connecting pipe, and the conical locking mechanism is coaxially arranged with the connecting pipe, and its large end is fixedly connected with the upper end surface of the connecting pipe; a rubber plug is also sleeved on the inside of the conical locking mechanism, and the rubber plug is fastened in the conical locking mechanism by a locking nut; the other end of the hose passes through the rubber plug and the interior of the connecting pipe in turn, and is locked by the locking nut, so that the heated air is passed into the heat exchange box to exchange heat with the cooling water in the heat exchange tube.

[0011] Preferably, the conical locking mechanism is a tightenable hollow claw structure, and is evenly spaced along the circumferential direction of the connecting tube on the upper end face of the connecting tube and tightened toward its axial direction; the outer diameter of the large end of the conical locking mechanism matches the outer diameter of the connecting tube, and its outer surface matches the inner surface of the locking nut.

[0012] Preferably, the rubber stopper is a conical structure, and its outer surface matches the inner surface of the conical locking mechanism; a through hole is vertically penetrated in the middle of the upper surface of the rubber stopper, and the through hole matches the diameter of the hose.

[0013] Preferably, an external thread is provided on the outer circumferential wall of the upper end of the connecting pipe along its circumferential direction, the external thread matches the locking nut, and the other end of the connecting pipe is threadedly fixed to the locking nut via the external thread.

[0014] Beneficial effects of the utility model:

[0015] (1) The utility model can not only effectively reduce the ambient temperature of the cooling bed, but also effectively recycle the waste heat of the steel on the cooling bed, thus achieving energy conservation and emission reduction;

[0016] (2) The first connection assembly and the second connection assembly of the utility model both adopt threaded quick connection, which is simple to operate, easy to use and has a reliable connection;

[0017] (3) The utility model provides a spoiler block, thereby effectively reducing the flow rate of cooling water and improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 The utility model is a structural schematic diagram of a waste heat recovery device for a steel rolling cooling bed.

[0020] Figure 2 for Figure 1 Schematic diagram of the structure of the second connection component.

[0021] Among them, 1-cooling bed; 2-blower; 3-lower cover; 4-upper cover; 5-first connecting assembly; 6-support bracket; 7-guide rail chain assembly; 8-second connecting assembly; 9-hose; 10-heat exchange box; 11-heat exchange tube; 12-spoiler block; 13-fixing plate; 14-water pump; 15-water tank; 16-exhaust pipe; 17-recovery box; 81-locking nut; 82-rubber plug; 83-connecting pipe; 84-external thread; 85-conical locking mechanism. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be clearly and completely described below through specific implementation methods.

[0023] The utility model is a steel rolling cooling bed waste heat recovery device, comprising a blower 2, an upper cover 4, a lower cover 3, a first connecting component 5, a hose 9, a second connecting component 8 and a heat exchanger; the specific structure is as follows Figure 1 , Figure 2 As shown, a lower cover shell 3 is horizontally spaced apart directly below the cooling bed 1, and an upper cover shell 4 is horizontally spaced apart directly above it, the upper cover shell 4 and the lower cover shell 3 enclose a hollow area, and the cooling bed 1 is covered therein; wherein, the upper cover shell 4 and the lower cover shell 3 are both semicircular arc structures, and the two are symmetrically arranged up and down, and do not interfere with the cooling operation of the steel on the cooling bed 1.

[0024] like Figure 1 As shown, a support bracket 6 is provided on one side of the cooling bed 1, and the support bracket 6 does not interfere with the action of conveying high-temperature steel to the cooling bed 1; a guide rail chain assembly 7 is also horizontally provided on the top of the support bracket 6, and the guide rail chain assembly 7 drives the upper cover 4 to move horizontally, thereby providing space for the maintenance of the cooling bed 1. Among them, the guide rail chain assembly 7 is a prior art, so it is not repeated here.

[0025] The utility model is provided with a first connecting assembly 5 on the top of the upper housing 4, and one end of the hose 9 is sealed and screwed with the first connecting assembly 5, and is communicated with the interior of the housing through the first connecting assembly 5, such as Figure 1 As shown, the other end of the hose 9 is sealed and connected to a channel of the heat exchanger through the second connecting assembly 8; the blower 2 is sealed and connected to the interior of the lower cover shell 3 through the bottom of the lower cover shell 3 through the pipeline, and circulates cold air under the cooling bed 1. After the cold air exchanges heat with the high-temperature steel on the cooling bed 1 to heat up, it enters the heat exchanger through the hose 9 and exchanges heat with the cooling water in another channel of the heat exchanger, thereby recovering the waste heat.

[0026] The heat exchanger includes a heat exchange box 10, a water tank 15, a recovery box 17, a water pump 14, a fixing plate 13, a heat exchange tube 11 and a spoiler 12; Figure 1 As shown, the heat exchange box 10 is a vertically arranged hollow rectangular structure, and it is arranged on one side of the cooling bed 1, and is arranged without interfering with the guide rail chain assembly 7 and the support bracket 6; the heat exchange box 10 is also symmetrically and parallelly arranged with fixed plates 13 at intervals, each of which is a rectangular structure matching the interior of the heat exchange box 10, and is vertically arranged longitudinally, and is fixedly connected to the front and rear inner sides of the heat exchange box 10 respectively; inside the heat exchange box 10, relative to the two fixed plates 13, a plurality of heat exchange tubes 11 are horizontally and parallelly arranged from top to bottom, and each heat exchange tube 11 is a horizontally arranged hollow flat rectangular structure The structure has a left and right end, and the corresponding fixing plates 13 are vertically extended from the left and right ends respectively. The adjacent ends of each upper and lower adjacent heat exchange tubes 11 are staggered and sealed and connected, and are integrally formed to form a vertically arranged meandering structure; the right end of the bottom heat exchange tube 11 extends horizontally to the right from the right side surface of the heat exchange box 10, and is sealed and connected to the water tank 15 through the water pump 14, and then the water tank 15 provides cooling water to the heat exchange tube 11; the right end of the top heat exchange tube 11 extends horizontally to the right from the right side surface of the heat exchange box 10, and is sealed and connected to the recovery box 17, and then the cooling water after heat exchange and heating is collected in the recovery box 17.

[0027] like Figure 1 As shown, the second connecting component 8 is vertically arranged on the upper surface of the heat exchange box 10 on the right side, and the other end of the hose 9 is sealed and screwed to the second connecting component 8, and is connected with the interior of the heat exchange box 10 through the second connecting component 8, so that the heated air is transported to the heat exchange box 10 to exchange heat with the cooling water in the heat exchange tube 11; an exhaust pipe 16 is also vertically arranged on the left side of the heat exchange box 10 near its bottom end, and the exhaust pipe 16 is sealed and connected with the interior of the heat exchange box 10, so as to discharge the cooled air.

[0028] like Figure 1As shown, a plurality of spoiler blocks 12 are sequentially arranged at intervals inside each heat exchange tube 11 along its length direction, and each spoiler block 12 is arranged horizontally and longitudinally, and is a rectangular structure matching the interior of the corresponding heat exchange tube 11; the width of each spoiler block 12 is two-thirds of the width of the interior of the corresponding heat exchange tube 11, and adjacent spoiler blocks 12 are arranged at intervals with an offset up and down, and are respectively fixedly connected to the corresponding inner walls of the corresponding heat exchange tube 11, thereby reducing the flow rate of the cooling water in the heat exchange tube 11 through the spoiler blocks 12.

[0029] The first connecting assembly 5 and the second connecting assembly 8 of the present invention have the same structure, and the second connecting assembly 8 includes a locking nut 81, a rubber plug 82, a connecting pipe 83 and a conical locking mechanism 85; Figure 1 , Figure 2 As shown, the connecting pipe 83 is a vertically arranged hollow cylindrical structure, and its lower end is embedded and fixedly connected with the upper surface of the heat exchange box 10 at the right end, and is sealed and connected with the interior of the heat exchange box 10; a conical locking mechanism 85 is also vertically arranged on the upper end face of the connecting pipe 83, and the conical locking mechanism 85 is coaxially arranged with the connecting pipe 83, and its large end is fixedly connected with the upper end face of the connecting pipe 83; wherein, the conical locking mechanism 85 is a tightenable hollow claw structure, and is evenly spaced and arranged on the upper end face of the connecting pipe 83 along the circumferential direction of the connecting pipe 83, and is tightened toward its axial direction; the outer diameter of the large end of the conical locking mechanism 85 matches the outer diameter of the connecting pipe 83, and its outer surface matches the inner surface of the locking nut 81.

[0030] A rubber plug 82 is also sleeved inside the conical locking mechanism 85, and the rubber plug 82 is fastened inside the conical locking mechanism 85 by a locking nut 81; Figure 1 , Figure 2 As shown, the rubber plug 82 is a conical structure, and its outer surface matches the inner surface of the conical locking mechanism 85; a through hole is vertically opened in the middle of the upper surface of the rubber plug 82, and the through hole matches the diameter of the hose 9.

[0031] like Figure 1 , Figure 2 As shown, an external thread 84 is provided on the outer circumferential wall of the upper end of the connecting pipe 83 along its circumferential direction, and the external thread 84 matches the locking nut 81, and the other end of the connecting pipe 83 is screwed and fixed to the locking nut 81 through the external thread 84. The other end of the hose 9 of the utility model passes through the rubber plug 82 and the interior of the connecting pipe 83 in turn, and is locked by the locking nut 81, so that the heated air is passed into the heat exchange box 10 to exchange heat with the cooling water in the heat exchange tube 11.

[0032] The working principle of the utility model is as follows: the blower 2 circulates and blows cold air through the pipeline through the lower cover 3 to the bottom of the cooling bed 1. After the cold air exchanges heat with the high-temperature steel on the cooling bed 1 and heats up, it enters the interior of the heat exchanger through the hose 9 and exchanges heat with the cooling water in the heat exchange tube 11. The heated cooling water is collected in the recovery box 17, thereby realizing waste heat recovery. When the cooling bed 1 needs to be repaired, the hose 9 and the first connecting assembly 5 are first disassembled, and then the upper cover 4 is driven by the guide rail chain assembly 7 to move horizontally, thereby providing space for the maintenance of the cooling bed 1.

[0033] Beneficial effects of the utility model:

[0034] (1) The utility model can not only effectively reduce the ambient temperature of the cooling bed 1, but also effectively recycle the waste heat of the steel on the cooling bed 1, thereby achieving energy conservation and emission reduction;

[0035] (2) The first connection assembly 5 and the second connection assembly 8 of the utility model both adopt threaded quick connection, which is simple to operate, easy to use and has a reliable connection;

[0036] (3) The utility model provides the spoiler 12, thereby effectively reducing the flow rate of cooling water and improving the heat exchange efficiency.

[0037] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the technical requirements.

Claims

1. A steel rolling cooling bed waste heat recovery device, characterized in that: The invention comprises a blower, an upper cover shell, a lower cover shell, a first connecting component, a hose, a second connecting component and a heat exchanger; a lower cover shell is horizontally spaced apart directly below the cooling bed, and an upper cover shell is horizontally spaced apart directly above the lower cover shell, the upper cover shell and the lower cover shell enclose a hollow area and cover the cooling bed therein; a first connecting component is provided on the top of the upper cover shell, and one end of the hose is sealed and screwed with the first connecting component and communicated with the interior of the cover shell through the first connecting component, and the other end of the hose is sealed and communicated with a channel of the heat exchanger through the second connecting component; the blower is sealed and communicated with the interior of the lower cover shell through the bottom of the lower cover shell through a pipeline, and circulates cold air to the bottom of the cooling bed, and after the cold air exchanges heat with the high-temperature steel on the cooling bed to heat up, it enters the heat exchanger through the hose, exchanges heat with the cooling water in another channel of the heat exchanger, and then recovers waste heat.

2. The steel rolling cooling bed waste heat recovery device according to claim 1, characterized in that: The upper cover shell and the lower cover shell are both semicircular arc structures, and are symmetrically arranged up and down, and do not interfere with the cooling operation of the steel on the cooling bed.

3. The steel rolling cooling bed waste heat recovery device according to claim 1, characterized in that: It also includes a guide rail chain assembly and a support bracket; a support bracket is provided on one side of the cooling bed, and the support bracket does not interfere with the action of conveying high-temperature steel to the cooling bed; a guide rail chain assembly is also horizontally provided on the top of the support bracket, and the upper cover shell is driven to move horizontally by the guide rail chain assembly, thereby providing space for maintenance of the cooling bed.

4. The steel rolling cooling bed waste heat recovery device according to claim 3, characterized in that: The heat exchanger comprises a heat exchange box, a water tank, a recovery box, a water pump, a fixed plate and a heat exchange tube; the heat exchange box is a vertically arranged hollow rectangular structure, and is arranged on one side of the cooling bed, and is arranged without interfering with the guide rail chain assembly and the support bracket; fixed plates are also arranged in parallel and at intervals in the heat exchange box at left and right sides, each of which is a rectangular structure matching the interior of the heat exchange box, and is arranged vertically and longitudinally, and is fixedly connected to the front and rear inner sides of the heat exchange box respectively; a plurality of heat exchange tubes are also arranged horizontally and parallelly from top to bottom in sequence between the two fixed plates in the heat exchange box, and each of the heat exchange tubes is A horizontally arranged hollow flat rectangular structure, and its left and right ends respectively extend vertically from the corresponding fixed plates, and the adjacent ends of each upper and lower adjacent two heat exchange tubes are respectively staggered and sealed and connected, and are integrally formed to form a vertically arranged serpentine structure; the right end of the bottom heat exchange tube extends horizontally to the right from the right side surface of the heat exchange box, and is sealed and connected to the water tank through a water pump, and then cooling water is provided to the heat exchange tube through the water tank; the right end of the top heat exchange tube extends horizontally to the right from the right side surface of the heat exchange box, and is sealed and connected to the recovery box, and then the cooling water after heat exchange and heating is collected in the recovery box.

5. The steel rolling cooling bed waste heat recovery device according to claim 4, characterized in that: The second connecting component is vertically arranged on the right side of the upper surface of the heat exchange box, and the other end of the hose is sealed and screwed to the second connecting component, and is connected with the interior of the heat exchange box through the second connecting component, so that the heated air is transported to the heat exchange box for heat exchange with the cooling water in the heat exchange tube; an exhaust pipe is also vertically arranged on the left side of the heat exchange box near its bottom end, and the exhaust pipe is sealed and connected with the interior of the heat exchange box, so as to discharge the cooled air.

6. The steel rolling cooling bed waste heat recovery device according to claim 4, characterized in that: A number of spoiler blocks are arranged in sequence along the length direction of each heat exchange tube. Each spoiler block is arranged horizontally and longitudinally, and is a rectangular structure that matches the interior of the corresponding heat exchange tube. The width of each spoiler block is two-thirds of the width of the interior of the corresponding heat exchange tube, and adjacent spoiler blocks are arranged in an offset manner up and down, and are fixedly connected to the corresponding inner walls of the corresponding heat exchange tubes, respectively, so that the flow rate of cooling water in the heat exchange tube is reduced by the spoiler blocks.

7. The steel rolling cooling bed waste heat recovery device according to claim 4, characterized in that: The first connecting assembly has the same structure as the second connecting assembly, and the second connecting assembly includes a locking nut, a rubber plug, a connecting pipe and a conical locking mechanism; the connecting pipe is a vertically arranged hollow cylindrical structure, and its lower end is embedded and fixedly connected with the upper surface of the heat exchange box at the right end, and is sealed and connected with the interior of the heat exchange box; a conical locking mechanism is also vertically arranged on the upper end face of the connecting pipe, and the conical locking mechanism is coaxially arranged with the connecting pipe, and its large end is fixedly connected with the upper end face of the connecting pipe; a rubber plug is also sleeved inside the conical locking mechanism, and the rubber plug is fastened in the conical locking mechanism by a locking nut; the other end of the hose passes through the rubber plug and the interior of the connecting pipe in turn, and is locked by the locking nut, so that the heated air is passed into the heat exchange box to exchange heat with the cooling water in the heat exchange pipe.

8. The steel rolling cooling bed waste heat recovery device according to claim 7, characterized in that: The conical locking mechanism is a tightenable hollow claw structure, and is evenly spaced along the circumferential direction of the connecting pipe on the upper end surface of the connecting pipe and tightened toward its axial direction; the outer diameter of the large end of the conical locking mechanism matches the outer diameter of the connecting pipe, and its outer surface matches the inner surface of the locking nut.

9. The steel rolling cooling bed waste heat recovery device according to claim 8, characterized in that: The rubber plug is a conical structure, and its outer surface matches the inner surface of the conical locking mechanism; a through hole is vertically penetrated in the middle of the upper surface of the rubber plug, and the through hole matches the diameter of the hose.

10. The steel rolling cooling bed waste heat recovery device according to claim 9, characterized in that: An external thread is also provided on the outer circumferential wall of the upper end of the connecting pipe along its circumferential direction, the external thread matches the locking nut, and the other end of the connecting pipe is screwed and fixed to the locking nut through the external thread.

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