Heat recovery device suitable for horizontal hot steel coil

Abstract

The utility model relates to the technical field of heat recovery of hot steel coils, in particular to a heat recovery device suitable for a horizontal hot steel coil. A heat recovery device suitable for a horizontal hot steel coil comprises a horizontal heat module A and a horizontal heat module B. The horizontal heat module A comprises a supporting heat exchange module and a plurality of annular heat exchange modules, and the supporting heat exchange module is used for supporting and placing the horizontal hot steel coil. The annular heat exchange modules make direct contact with the horizontal hot steel coil and are arranged on the peripheral side of the horizontal hot steel coil. The device can be suitable for heat recovery of the horizontal hot steel coil, rapid heat transfer is achieved in a direct contact mode with the hot steel coil, the heat exchange efficiency and the waste heat recovery rate can be effectively improved, efficient heat recovery of the horizontal hot steel coil is achieved, and the device is relatively simple in structure, low in investment cost, high in heat recovery effect and convenient to achieve large-scale application and popularization. Good market prospects are realized.

Description

Technical Field

[0001] The present application relates to the technical field of heat recovery of hot steel coils, and in particular to a heat recovery device suitable for horizontal hot steel coils. Background Art

[0002] The hot rolled coils and annealed cold rolled coils in the metallurgical industry have a temperature of 450-650℃ after rolling. If this part of heat is recycled and reused, it can effectively improve the efficiency of heat recovery, reduce the energy consumption of the metallurgical industry, and alleviate the problem of resource and environmental tension. However, after market research, it was found that most domestic metallurgical enterprises currently adopt natural cooling to room temperature, and some adopt air cooling to room temperature, and have not effectively recycled and reused this part of heat energy.

[0003] After research and testing, the inventor developed a hot steel coil heat recovery device with patent number 202421366282.2, which is aimed at vertical hot steel coil heat recovery. As the inventor conducted subsequent field visits and investigations, it was found that some steel coils are only suitable for horizontal placement due to performance requirements, resulting in the inability of existing vertical hot steel coil heat recovery equipment to meet the demand. To this end, the applicant developed a heat recovery device suitable for horizontal hot steel coils. Utility Model Content

[0004] In order to solve the existing technical problems, the present application provides a heat recovery device suitable for horizontal hot steel coils.

[0005] The present application provides a heat recovery device for horizontal hot steel coils, which is realized by the following technical solutions:

[0006] A device for recovering heat from a horizontal hot steel coil comprises a first heat exchange medium storage tank, a second heat exchange medium storage tank, a flash evaporation system, a waste heat boiler, and a horizontal heat module A and a horizontal heat module B; the heat exchange medium stored in the first heat exchange medium storage tank flows through the horizontal heat module A for heat exchange and is then input into the second heat exchange medium storage tank; the heat exchange medium in the second heat exchange medium storage tank is input into the flash evaporation system to generate steam A; the steam A input into the flash evaporation system flows through the horizontal heat module B for heat exchange and obtains steam B; the obtained steam B is input into the waste heat boiler; the steam C output from the waste heat boiler is used for power generation or drying or is input into a steam network; the horizontal heat module A and the horizontal heat module B have the same structure, taking the horizontal heat module A as an example: the horizontal heat module A comprises a supporting heat exchange module and a plurality of annular heat exchange modules, the supporting heat exchange module is used to support and place the horizontal hot steel coil; the plurality of annular heat exchange modules are in direct contact with the horizontal hot steel coil and are arranged on the outer peripheral side of the horizontal hot steel coil.

[0007] The present application can be applied to the heat recovery of horizontal hot steel coils, and it realizes rapid heat transfer with the hot steel coils by direct contact, which can effectively improve the heat exchange efficiency and waste heat recovery rate, and realize efficient heat energy recovery for the horizontal hot steel coils. The equipment structure is relatively simple, the investment cost is low, the heat energy recovery effect is high, and it is easy to realize large-scale promotion and application, and has good market prospects.

[0008] Preferably, the supporting heat exchange module includes a supporting heat exchange member, which is formed with an arc groove for supporting and placing a horizontal hot steel coil; a first serpentine flow channel is formed inside the supporting heat exchange module; the first serpentine flow channel of the supporting heat exchange module is connected to the first heat exchange medium storage tank and the second heat exchange medium storage tank.

[0009] By adopting the above technical solution, on the one hand, it can play a better supporting and fixing role; on the other hand, it can effectively improve the heat exchange efficiency and waste heat recovery rate, and realize efficient heat energy recovery for horizontal hot steel coils.

[0010] Preferably, a first heat-enhancing conductive layer for improving heat conduction efficiency is formed on the surface of the arc-shaped groove supporting the heat exchange module.

[0011] By adopting the above technical solutions, the heat exchange efficiency and waste heat recovery rate can be further improved.

[0012] Preferably, a first thermal insulation coating is formed on the circumference of the supporting heat exchange module except the surface of the arc-shaped groove.

[0013] By adopting the above technical solution, the waste heat recovery rate can be further improved.

[0014] Preferably, the annular heat exchange module includes an annular heat exchange element, one surface of which is directly attached to the outer peripheral side of the horizontal hot steel coil; a second serpentine flow channel is formed inside the annular heat exchange element; the second serpentine flow channel of the annular heat exchange element is connected to the first heat exchange medium storage tank and the second heat exchange medium storage tank.

[0015] By adopting the above technical solution, the heat exchange efficiency and waste heat recovery rate can be effectively improved, and efficient heat energy recovery can be achieved for horizontal hot steel coils.

[0016] Preferably, a second heat-enhancing conductive layer is formed on the surface of the annular heat exchange module attached to the outer peripheral side of the horizontal hot steel coil.

[0017] By adopting the above technical solutions, the heat exchange efficiency and waste heat recovery rate can be further improved.

[0018] Preferably, the annular heat exchange module is formed with a second thermal insulation coating except for the peripheral side thereof in contact with the outer peripheral side of the horizontal hot steel coil.

[0019] By adopting the above technical solution, the waste heat recovery rate can be further improved.

[0020] Preferably, a plurality of latch teeth are formed on one side of the annular heat exchanger in the length direction, and a latch groove engaged with the plurality of latch teeth is formed on the other side of the annular heat exchanger in the length direction; adjacent annular heat exchangers are detachably connected.

[0021] By adopting the above technical solution, the heat exchange efficiency and waste heat recovery rate can be effectively improved, and efficient heat energy recovery can be achieved for horizontal hot steel coils. At the same time, it is easy to disassemble, assemble and maintain, thereby improving the convenience of equipment installation and use and reducing manual labor.

[0022] In summary, this application has the following advantages:

[0023] 1. This application can be applied to the heat recovery of horizontal hot steel coils. It can achieve rapid heat transfer with the hot steel coils in direct contact, effectively improve the heat exchange efficiency and waste heat recovery rate, and realize efficient heat energy recovery for the horizontal hot steel coils.

[0024] 2. The equipment structure of this application is relatively simple, the investment cost is low, the heat recovery effect is high, it is easy to achieve large-scale promotion and application, and has good market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of a heat recovery device for horizontal hot steel coils in an embodiment of the present application.

[0026] Figure 2 It is a schematic diagram of the connection structure of the horizontal heat module A in the embodiment of the present application.

[0027] In the figure, 1. horizontal heat module A; 11. support heat exchange module; 110. support heat exchange element; 111. arc groove; 112. first serpentine flow channel; 12. annular heat exchange module; 120. annular heat exchange element; 121. second serpentine flow channel; 122. latch; 123. latch groove; 2. horizontal heat module B; 3. first heat exchange medium storage tank; 4. second heat exchange medium storage tank; 5. flash evaporation system; 6. waste heat boiler. DETAILED DESCRIPTION

[0028] The present application is further described in detail below with reference to the accompanying drawings and embodiments. Example

[0029] Reference Figure 1A heat recovery device suitable for horizontal hot steel coils includes a horizontal heat module A1, a horizontal heat module B2, a first heat exchange medium storage tank 3, a second heat exchange medium storage tank 4, a flash evaporation system 5, and a waste heat boiler 6. The heat exchange medium stored in the first heat exchange medium storage tank 3 flows through the horizontal heat module A1 for heat exchange and is input into the second heat exchange medium storage tank 4. The heat exchange medium in the second heat exchange medium storage tank 4 is input into the flash evaporation system 5 to generate steam A. The steam A input into the flash evaporation system 5 flows through the horizontal heat module B2 for heat exchange to obtain steam B. The obtained steam B is input into the waste heat boiler 6. The steam C output by the waste heat boiler 6 is used for power generation or drying or input into a steam network.

[0030] Reference Figure 1 and Figure 2 The horizontal heat module A1 and the horizontal heat module B2 have the same structure. Take the horizontal heat module A1 as an example: the horizontal heat module A1 includes a supporting heat exchange module 11 and a plurality of annular heat exchange modules 12. Specifically, the horizontal heat module A1 is composed of a supporting heat exchange module 11 and five annular heat exchange modules 12. The supporting heat exchange module 11 is used to support and place the horizontal hot steel coil. The annular heat exchange module 12 is in direct contact with the horizontal hot steel coil and is arranged on the outer peripheral side of the horizontal hot steel coil.

[0031] Reference Figure 1 and Figure 2 The supporting heat exchange module 11 includes a supporting heat exchange member 110, and the supporting heat exchange member 110 is formed with an arc groove 111 for supporting and placing a horizontal hot steel coil. A first serpentine flow channel 112 is formed inside the supporting heat exchange module 11.

[0032] Reference Figure 1 and Figure 2 The first serpentine flow channel 112 supporting the heat exchange module 11 in the horizontal heat module A1 is connected to the first heat exchange medium storage tank 3 and the second heat exchange medium storage tank 4 through a pipeline. That is, the input end of the first serpentine flow channel 112 is connected to the first heat exchange medium storage tank 3 through a pipeline, and the output end of the first serpentine flow channel 112 is connected to the second heat exchange medium storage tank 4 through a pipeline.

[0033] Reference Figure 1 and Figure 2 One end of the first serpentine flow channel 112 supporting the heat exchange module 11 in the horizontal heat module B2 is connected to the flash evaporation system 5 through a pipeline, and the other end is connected to the waste heat boiler 6 through a pipeline.

[0034] In order to improve the heat exchange efficiency and waste heat recovery rate, a first heat-increasing conductive layer for improving the heat conduction efficiency is formed on the surface of the arc groove 111 supporting the heat exchange module 11. The first heat-increasing conductive layer is a copper-plated layer, a copper foil layer, or a graphene layer. In order to improve the waste heat recovery rate, the surrounding side of the supporting heat exchange module 11 except the surface of the arc groove 111 is sprayed with a commercially available thermal insulation coating to form a first thermal insulation coating. The thermal insulation coating can be selected but not limited to heat-resistant nano-composite thermal insulation coating HL950.

[0035] Reference Figure 1 and Figure 2 The single annular heat exchange module 12 includes an annular heat exchange member 120, one surface of which is directly attached to the outer peripheral side of the horizontal hot steel coil. A second serpentine flow channel 121 is formed inside the annular heat exchange member 120.

[0036] Reference Figure 1 and Figure 2 The second serpentine flow channel 121 of the annular heat exchanger 120 in the horizontal heat module A1 is connected to the first heat exchange medium storage tank 3 and the second heat exchange medium storage tank 4 through a pipeline. That is, one end of the second serpentine flow channel 121 of the annular heat exchanger 120 in the horizontal heat module A1 is connected to the first heat exchange medium storage tank 3 through a pipeline, and the other end of the second serpentine flow channel 121 of the annular heat exchanger 120 is connected to the second heat exchange medium storage tank 4 through a pipeline.

[0037] Reference Figure 1 and Figure 2 One end of the second serpentine flow channel 121 in the horizontal heat module B2 is connected to the flash evaporation system 5 through a pipeline, and the other end of the second serpentine flow channel 121 is connected to the waste heat boiler 6 through a pipeline.

[0038] In order to improve the heat exchange efficiency and waste heat recovery rate, the surface of the annular heat exchange module 12 attached to the outer peripheral side of the horizontal hot steel coil is formed with a second heat-increasing conductive layer, and the second heat-increasing conductive layer is a copper-plated layer, a copper foil layer, or a graphene layer. In order to improve the waste heat recovery rate, the annular heat exchange module 12 is sprayed with a commercially available thermal insulation coating to form a second thermal insulation coating except for the peripheral side attached to the outer peripheral side of the horizontal hot steel coil. The thermal insulation coating can be selected but not limited to heat-resistant nano-composite thermal insulation coating HL950.

[0039] Reference Figure 1 and Figure 2A plurality of latch teeth 122 are formed on one side of the annular heat exchanger 120 in the length direction, and a latch groove 123 engaged with the plurality of latch teeth 122 is formed on the other side of the annular heat exchanger 120 in the length direction. The latch teeth 122 and the latch groove 123 in the annular heat exchanger 120 are connected to adjacent annular heat exchangers 120 in a detachable manner; the annular heat exchanger 120 adjacent to the supporting heat exchanger 110 is also connected to the supporting heat exchanger 110 in a detachable manner by latching, which is convenient for disassembly, assembly and maintenance, improves the convenience of equipment installation and use, and reduces the labor of manual work.

[0040] The present application can be applied to the heat recovery of horizontal hot steel coils, and it realizes rapid heat transfer with the hot steel coils by direct contact, which can effectively improve the heat exchange efficiency and waste heat recovery rate, and realize efficient heat energy recovery for the horizontal hot steel coils. The equipment structure is relatively simple, the investment cost is low, the heat energy recovery effect is high, and it is easy to realize large-scale promotion and application, and has good market prospects.

[0041] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A heat recovery device for horizontal hot steel coils, comprising a first heat exchange medium storage tank (3), a second heat exchange medium storage tank (4), a flash evaporation system (5), and a waste heat boiler (6), characterized in that: The system further comprises a horizontal heat module A (1) and a horizontal heat module B (2); the heat exchange medium stored in the first heat exchange medium storage tank (3) flows through the horizontal heat module A (1) for heat exchange and is then input into the second heat exchange medium storage tank (4); the heat exchange medium in the second heat exchange medium storage tank (4) is input into a flash evaporation system (5) to generate steam A; the steam A input into the flash evaporation system (5) flows through the horizontal heat module B (2) for heat exchange and obtains steam B; the obtained steam B is input into a waste heat boiler (6); the waste heat boiler (6) The output steam C is used for power generation or drying or is input into a steam network; the horizontal heat module A (1) and the horizontal heat module B (2) have the same structure. Taking the horizontal heat module A (1) as an example: the horizontal heat module A (1) comprises a supporting heat exchange module (11) and a plurality of annular heat exchange modules (12); the supporting heat exchange module (11) is used to support and place a horizontal hot steel coil; the plurality of annular heat exchange modules (12) are in direct contact with the horizontal hot steel coil and are arranged on the outer peripheral side of the horizontal hot steel coil.

2. The heat recovery device for horizontal hot steel coil according to claim 1, characterized in that: The support heat exchange module (11) comprises a support heat exchange member (110), the support heat exchange member (110) being formed with an arc-shaped groove (111) for supporting and placing a horizontal hot steel coil; a first serpentine flow channel (112) is formed inside the support heat exchange module (11); the first serpentine flow channel (112) of the support heat exchange module (11) is connected to the first heat exchange medium storage tank (3) and the second heat exchange medium storage tank (4).

3. The heat recovery device for horizontal hot steel coil according to claim 2 is characterized in that: A first heat-enhancing conductive layer for improving heat conduction efficiency is formed on the surface of the arc-shaped groove (111) supporting the heat exchange module (11).

4. A heat recovery device for horizontal hot steel coils according to claim 2 or 3, characterized in that: The supporting heat exchange module (11) is provided with a first heat insulating coating on all sides except the surface of the arc-shaped groove (111).

5. The heat recovery device for horizontal hot steel coil according to claim 1 is characterized in that: The annular heat exchange module (12) comprises an annular heat exchange element (120), one surface of the annular heat exchange element (120) being directly attached to the outer peripheral side of the horizontal hot steel coil; a second serpentine flow channel (121) is formed inside the annular heat exchange element (120); the second serpentine flow channel (121) of the annular heat exchange element (120) is connected to the first heat exchange medium storage tank (3) and the second heat exchange medium storage tank (4).

6. The heat recovery device for horizontal hot steel coils according to claim 5, characterized in that: The surface of the annular heat exchange module (12) attached to the outer peripheral side of the horizontal hot steel coil forms a second heat-enhancing conductive layer.

7. A heat recovery device for horizontal hot steel coils according to claim 5 or 6, characterized in that: The annular heat exchange module (12) is provided with a second heat insulating coating on all sides except the side in contact with the outer side of the horizontal hot steel coil.

8. The heat recovery device for horizontal hot steel coils according to claim 5 is characterized in that: A plurality of latch teeth (122) are formed on one side surface in the length direction of the annular heat exchanger (120), and a latch groove (123) engaged with the plurality of latch teeth (122) is formed on the other side surface in the length direction of the annular heat exchanger (120); adjacent annular heat exchangers (120) are detachably connected.

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