Cooling bed waste heat recovery device

Abstract

The utility model provides a cooling bed waste heat recovery device which is reasonable in layout in a limited space and high in heat energy recovery utilization rate. The heat exchange device comprises supporting mechanisms and heat exchange mechanisms installed between every two adjacent supporting mechanisms, the number of the heat exchange mechanisms between every two adjacent supporting mechanisms is larger than or equal to two, the heat exchange mechanism farthest from the starting end of the cooling bed serves as first-stage heat exchange, and the heat exchange mechanism farthest from the starting end of the cooling bed serves as second-stage heat exchange. And by parity of reasoning, the heat exchange mechanism closest to the starting end of the cooling bed serves as the last-stage heat exchange, the heat exchange medium sequentially flows from the first-stage heat exchange to the last-stage heat exchange, and the heat exchange mechanisms are movably installed or fixedly installed on the supporting mechanism. A heat exchange mechanism is reasonably arranged in a limited space, and the temperature of an area where first-stage heat exchange is located is relatively low, so that the area can be used for preheating of second-stage heat exchange, and so on, waste heat on the cooling bed is fully utilized, and the heat energy recycling rate is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of cooling bed waste heat recovery, and particularly relates to a cooling bed waste heat recovery device. Background Art

[0002] The waste heat from the cooling bed primarily comes from the sensible heat carried by the steel. During the natural cooling process, this heat is dissipated to the surrounding environment through radiation and air convection. The upper temperature of the pipe bed can reach over 700°C. As the bed moves, the temperature gradually decreases, cooling to 100°C below the cooling bed. Heat exchange efficiency varies across temperature zones, necessitating the rational layout of heat exchange mechanisms within a limited space to maximize heat recovery and minimize heat loss.

[0003] Patent application CN116464948A discloses a cooling bed waste heat recovery device and process based on flash evaporation technology. Several heat-absorbing covers are installed in parallel above the cooling bed. The heat-absorbing covers include a heat exchanger, thermal insulation material, a water inlet manifold, a water outlet manifold, and a hoisting structure. The heat exchanger is a coiled pipe, the inlet of the coiled pipe connected to the water inlet manifold, and the outlet of the coiled pipe connected to the water outlet manifold. The inlet and outlet manifolds are connected to the flash evaporator. The coiled pipe forms a heated plane that is horizontally covered above the cooling bed. The coiled pipe is fixed by a hoisting structure and is surrounded by thermal insulation material. In this structure, multiple heat exchangers are connected in parallel, and the heat exchange efficiency of heat exchangers in different temperature zones is different. The heat exchange tubes in the low-temperature zone lower the heat exchange efficiency of the heat exchange tubes in the high-temperature zone, resulting in low overall heat exchange efficiency. Utility Model Content

[0004] The utility model aims to provide a cooling bed waste heat recovery device with reasonable layout and high heat energy recovery rate in a limited space.

[0005] The technical solution of this utility model is:

[0006] The cooling bed waste heat recovery device includes a support mechanism 1 and a heat exchange mechanism 4, and is characterized in that: the heat exchange mechanism 4 is installed between two adjacent groups of support mechanisms 1, and the number of heat exchange mechanisms 4 between two adjacent groups of support mechanisms 1 is greater than or equal to two groups, the group of heat exchange mechanisms farthest from the starting end of the cooling bed serves as the first stage of heat exchange, the group of heat exchange mechanisms second farthest from the starting end of the cooling bed serves as the second stage of heat exchange, and so on, the group of heat exchange mechanisms closest to the starting end of the cooling bed serves as the last stage of heat exchange, and the heat exchange medium flows from the first stage of heat exchange to the last stage of heat exchange in sequence, and the heat exchange mechanism 4 can be movably installed or fixedly installed on the support mechanism 1.

[0007] Preferably, each set of heat exchange mechanisms 4 includes multiple parallel U-shaped heat exchange tubes 41, with the inlet of the U-shaped heat exchange tubes 41 at the bottom and the outlet at the top. Based on the principle that hot materials rise and cold materials fall, the gaseous heat exchange medium in the U-shaped heat exchange tubes automatically moves upward and is discharged. Furthermore, more U-shaped heat exchange tubes can be rationally arranged within a limited space, thereby improving heat exchange efficiency and reducing heat energy loss.

[0008] Preferably, the inlets of each U-shaped heat exchange tube 41 of the group of heat exchange mechanisms 4 farthest from the starting end of the cooling bed are connected in parallel to the first input header 44, the first input header 44 is used to introduce heat exchange medium, and the outlets of each U-shaped heat exchange tube 41 of the group of heat exchange mechanisms 4 farthest from the starting end of the cooling bed are connected in parallel to the first output header 43, the first output header 43 is used to output heat exchange medium; the inlets of each U-shaped heat exchange tube 41 of the group of heat exchange mechanisms 4 second farthest from the starting end of the cooling bed are connected in parallel to the second input header 45, the outlets of each U-shaped heat exchange tube 41 of the group of heat exchange mechanisms 4 second farthest from the starting end of the cooling bed are connected in parallel to the second output header 46, the second output header 46 is used to output heat exchange medium; the first output header 43 is connected in series with the second input header 45; and so on.

[0009] Preferably, each set of supporting mechanisms 1 includes a main column 11, an auxiliary column 12 and a crossbeam 13; the main column 11 and the auxiliary column 12 are fixedly installed perpendicular to the ground, and the crossbeam 13 is mounted on the main column 11 and the auxiliary column 12; the main column 11 and the auxiliary column 12 are both located on the input side of the cooling bed, and the length direction of the crossbeam 13 is parallel to the movement direction of the material on the cooling bed.

[0010] Preferably, a separate column 14 is fixed on the crossbeam 13 , and a hose support frame 15 for fixing the hose 3 is fixed on the separate column 14 .

[0011] Preferably, the separate columns 14 and the cross beam 13 are fixedly connected via diagonal braces 16 to form a stable triangular support.

[0012] Preferably, the U-shaped heat exchange tubes 41 of each group of heat exchange mechanisms 4 are fixed on a heat exchange bracket 42, and the heat exchange bracket 42 includes a rectangular frame and reinforcing angle irons 422, which are arranged in a cross shape and fixedly connected to the four corners of the rectangular frame.

[0013] Preferably, the heat exchange brackets 42 of two adjacent heat exchange mechanisms 4 are fixedly connected via a connector 421 .

[0014] Preferably, the cooling bed waste heat recovery device further includes a moving mechanism 2 , which includes a worm gear 21 fixed on the crossbeam 13 and a worm 22 matched with the worm gear 21 , and the lower end of the worm 22 is fixedly connected to the heat exchange mechanism 4 .

[0015] Preferably, each set of heat exchange mechanisms 4 is fixedly connected to four worm gears 22, so that the heat exchange mechanisms can move up and down smoothly.

[0016] The advantages of the present invention are: (1) The heat exchange mechanism is reasonably arranged in a limited space. The temperature of the area where the first stage heat exchange is located is relatively low, so it can be used as a preheating for the second stage heat exchange, and so on, thereby making full use of the waste heat on the cooling bed and improving the heat recovery rate. (2) The inlet of the U-shaped heat exchange tube is at the bottom and the outlet is at the top, so that the gaseous heat exchange medium in the U-shaped heat exchange tube automatically moves upward and is discharged, and more U-shaped heat exchange tubes can be reasonably arranged in a limited space, thereby improving the heat exchange efficiency and reducing heat energy loss. (3) The moving mechanism can move the heat exchange mechanism up and down so as to flexibly adjust the distance between the heat exchange mechanism and the cooling bed according to the temperature of the cooling bed, and has stronger universality. (4) The heat exchange system can be skid-mounted and modularized. All components are assembled in the factory and can be specifically configured according to customer needs, which can greatly reduce the workload on site and improve the factory quality of the product, and facilitate the inspection and maintenance of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the heat exchange mechanism structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the arrangement of the utility model on the cooling bed.

[0021] Among them: 1. Support mechanism; 11. Main column; 12. Auxiliary column; 13. Crossbeam; 14. Branch column; 15. Hose support frame; 16. Diagonal support rod; 2. Moving mechanism; 21. Worm gear; 22. Worm; 3. Hose; 4. Heat exchange mechanism; 41. U-shaped heat exchange tube; 42. Heat exchange bracket; 421. Connector; 422. Reinforced angle iron; 43. First output header; 44. First input header; 45. Second input header; 46. Second output header; 5. Steel pipe. DETAILED DESCRIPTION

[0022] The following describes the invention in detail by taking the waste heat recovery of the cooling bed of the steel pipe 5 as an example in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all of them.

[0023] like Figure 1 The cooling bed waste heat recovery device includes a supporting mechanism 1 and a heat exchange mechanism 4. The heat exchange mechanism 4 is installed between two adjacent groups of supporting mechanisms 1, and the number of heat exchange mechanisms 4 between two adjacent groups of supporting mechanisms 1 is greater than or equal to two groups. The group of heat exchange mechanisms farthest from the starting end of the cooling bed serves as the first stage of heat exchange, the group of heat exchange mechanisms second farthest from the starting end of the cooling bed serves as the second stage of heat exchange, and so on. The group of heat exchange mechanisms closest to the starting end of the cooling bed serves as the last stage of heat exchange. The heat exchange medium flows from the first stage of heat exchange to the last stage of heat exchange in sequence. The heat exchange mechanism 4 can be movably installed or fixedly installed on the supporting mechanism 1.

[0024] Preferably, each set of heat exchange mechanisms 4 includes multiple parallel U-shaped heat exchange tubes 41, with the inlet of the U-shaped heat exchange tubes 41 at the bottom and the outlet at the top. Based on the principle that hot materials rise and cold materials fall, the gaseous heat exchange medium in the U-shaped heat exchange tubes automatically moves upward and is discharged. Furthermore, more U-shaped heat exchange tubes can be rationally arranged within a limited space, thereby improving heat exchange efficiency and reducing heat energy loss.

[0025] Preferably, the inlets of each U-shaped heat exchange tube 41 of the group of heat exchange mechanisms 4 farthest from the starting end of the cooling bed are connected in parallel to the first input header 44, the first input header 44 is used to uniformly introduce the heat exchange medium, the outlets of each U-shaped heat exchange tube 41 of the group of heat exchange mechanisms 4 farthest from the starting end of the cooling bed are connected in parallel to the first output header 43, the first output header 43 is used to uniformly output the heat exchange medium; the inlets of each U-shaped heat exchange tube 41 of the group of heat exchange mechanisms 4 second farthest from the starting end of the cooling bed are connected in parallel to the second input header 45, the outlets of each U-shaped heat exchange tube 41 of the group of heat exchange mechanisms 4 second farthest from the starting end of the cooling bed are connected in parallel to the second output header 46, the second output header 46 is used to uniformly output the heat exchange medium; the first output header 43 is connected in series with the second input header 45; and so on.

[0026] Preferably, each set of supporting mechanisms 1 includes a main column 11, an auxiliary column 12 and a crossbeam 13; the main column 11 and the auxiliary column 12 are fixedly installed perpendicular to the ground, and the crossbeam 13 is mounted on the main column 11 and the auxiliary column 12; the main column 11 and the auxiliary column 12 are both located on the input side of the cooling bed, and the length direction of the crossbeam 13 is parallel to the movement direction of the material on the cooling bed.

[0027] Preferably, a separate column 14 is fixed on the crossbeam 13 , and a hose support frame 15 for fixing the hose 3 is fixed on the separate column 14 .

[0028] Preferably, the separate columns 14 and the cross beam 13 are fixedly connected via diagonal braces 16 to form a stable triangular support.

[0029] like Figure 2Each set of U-shaped heat exchange tubes 41 of heat exchange mechanism 4 is fixed to a heat exchange bracket 42. The bracket 42 comprises a rectangular frame and reinforced angle irons 422 arranged in a "M" shape and fixedly connected to the four corners of the rectangular frame. Preferably, the heat exchange brackets 42 of two adjacent heat exchange mechanisms 4 are fixedly connected via connectors 421.

[0030] Preferably, the cooling bed waste heat recovery device further includes a moving mechanism 2 , which includes a worm gear 21 fixed on the crossbeam 13 and a worm 22 matched with the worm gear 21 , and the lower end of the worm 22 is fixedly connected to the heat exchange mechanism 4 .

[0031] Preferably, each set of heat exchange mechanisms 4 is fixedly connected to four worm gears 22, so that the heat exchange mechanisms can move up and down smoothly.

[0032] like Figure 3 The length direction of the crossbeam 13 is parallel to the moving direction of the material on the cooling bed. On the input side of the cooling bed, multiple groups of support mechanisms 1 and heat exchange mechanisms 4 can be arranged.

[0033] According to the actual scene and the concept of energy cascade utilization, combined with the actual requirements of emergency treatment of cooling bed accidents, the utility model sets a quickly movable heat exchange mechanism 4 above the cooling bed, and the heat exchange mechanism 4 is located within the height range of 500-1500mm above the cooling bed; no forced heat exchange is added, and only the radiation heat and part of the convection heat are absorbed in the original temperature field, which does not cause adverse effects on the cooling process and temperature field of the original cooling bed; the water volume of the heat exchange medium is adjustable, and the heat intake can also be dynamically adjusted, so the system is stable and the quality of the steel is not affected.

Claims

1. A cooling bed waste heat recovery device, comprising a support mechanism (1) and a heat exchange mechanism (4), characterized in that: The heat exchange mechanism (4) is installed between two adjacent groups of support mechanisms (1), and the number of heat exchange mechanisms (4) between the two adjacent groups of support mechanisms (1) is greater than or equal to two groups. The group of heat exchange mechanisms farthest from the starting end of the cooling bed serves as the first stage of heat exchange, the group of heat exchange mechanisms second farthest from the starting end of the cooling bed serves as the second stage of heat exchange, and so on. The group of heat exchange mechanisms closest to the starting end of the cooling bed serves as the last stage of heat exchange. The heat exchange medium flows from the first stage of heat exchange to the last stage of heat exchange in sequence. The heat exchange mechanism (4) can be movably installed or fixedly installed on the support mechanism (1).

2. The cooling bed waste heat recovery device according to claim 1, characterized in that: Each set of heat exchange mechanisms (4) includes a plurality of parallel U-shaped heat exchange tubes (41), wherein the inlet of the U-shaped heat exchange tubes (41) is at the bottom and the outlet is at the top.

3. The cooling bed waste heat recovery device according to claim 2, characterized in that: The inlets of the U-shaped heat exchange tubes (41) of the group of heat exchange mechanisms (4) farthest from the starting end of the cooling bed are connected in parallel to the first input header (44), and the first input header (44) is used to introduce the heat exchange medium. The outlets of the U-shaped heat exchange tubes (41) of the group of heat exchange mechanisms (4) farthest from the starting end of the cooling bed are connected in parallel to the first output header (43), and the first output header (43) is used to output the heat exchange medium. The inlets of the U-shaped heat exchange tubes (41) of the group of heat exchange mechanisms (4) second farthest from the starting end of the cooling bed are connected in parallel to the second input header (45), and the outlets of the U-shaped heat exchange tubes (41) of the group of heat exchange mechanisms (4) second farthest from the starting end of the cooling bed are connected in parallel to the second output header (46), and the second output header (46) is used to output the heat exchange medium; the first output header (43) and the second input header (45) are connected in series; And so on.

4. The cooling bed waste heat recovery device according to any one of claims 1 to 3, characterized in that: Each support mechanism (1) includes a main column (11), an auxiliary column (12) and a crossbeam (13); the main column (11) and the auxiliary column (12) are fixedly installed perpendicular to the ground, and the crossbeam (13) is mounted on the main column (11) and the auxiliary column (12); the main column (11) and the auxiliary column (12) are located on the input side of the cooling bed, and the length direction of the crossbeam (13) is parallel to the movement direction of the material on the cooling bed.

5. The cooling bed waste heat recovery device according to claim 4, characterized in that: A separate column (14) is also fixed on the crossbeam (13), and a hose support frame (15) for fixing the hose (3) is also fixed on the separate column (14).

6. The cooling bed waste heat recovery device according to claim 5, characterized in that: The separate columns (14) and the crossbeam (13) are fixedly connected via diagonal bracing rods (16).

7. The cooling bed waste heat recovery device according to any one of claims 1 to 3, characterized in that: The U-shaped heat exchange tubes (41) of each group of heat exchange mechanisms (4) are fixed on a heat exchange bracket (42), and the heat exchange bracket (42) comprises a rectangular frame and reinforced angle irons (422). The reinforced angle irons (422) are arranged in a cross-shaped pattern and fixedly connected to the four corners of the rectangular frame.

8. The cooling bed waste heat recovery device according to claim 6, characterized in that: The heat exchange brackets (42) of two adjacent heat exchange mechanisms (4) are fixedly connected via a connecting piece (421).

9. The cooling bed waste heat recovery device according to claim 4, characterized in that: The cooling bed waste heat recovery device further comprises a moving mechanism (2), the moving mechanism (2) comprising a worm wheel (21) fixed on the crossbeam (13) and a worm (22) cooperating with the worm wheel (21), the lower end of the worm (22) being fixedly connected to the heat exchange mechanism (4).

10. The cooling bed waste heat recovery device according to claim 9, characterized in that: Each set of heat exchange mechanisms (4) is fixedly connected to four worm gears (22).

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