Rapid cooling and blowing device with waste heat recovery function

Abstract

The invention discloses a rapid cooling injection device with a waste heat recovery function, and relates to the field of heat treatment. The rapid cooling injection device with the waste heat recovery function comprises an injection device shell internally provided with a cooling cavity, a support arranged in the injection device shell, an upper injection box, a lower injection box and a cooling fan arranged outside the injection device shell, wherein the upper injection box and the lower injection box are connected to the top and the bottom of the support in an up-down spaced mode. The bottom wall of the upper spraying box and the top wall of the lower spraying box are respectively provided with a plurality of cooling nozzles, the spraying device shell is connected with a plurality of rotatable rollers located between the upper spraying box and the lower spraying box, the cooling fan is connected with the upper spraying box and the lower spraying box, the two ends of the spraying device shell are respectively provided with an opening communicated with the cooling cavity, and the openings are connected with one-way opening and closing door curtains. And the top of the blowing device shell is connected with a waste heat recovery air pipe. The rapid cooling and blowing device with the waste heat recovery function can rapidly and efficiently cool plates and then recover waste heat air, meanwhile, the sealing performance is good, and waste heat overflow is reduced.

Description

Technical Field

[0001] The present application relates to the field of heat treatment, and in particular to a rapid cooling and blowing device with waste heat recovery. Background Art

[0002] Metal sheet products need to be cooled after tempering. The existing tempering cooling method generally uses air cooling on a cooling bed, which not only takes a long cooling time but also causes redundant equipment layout. When the output is low, the cooling bed equipment can meet production needs, but as the output increases, the cooling capacity needs to be improved to meet the production line needs.

[0003] Therefore, an energy-saving and fast device capable of cooling and tempering metal products is needed to meet the demand. Summary of the Invention

[0004] The purpose of this application is to provide a rapid cooling blowing device with waste heat recovery, which can quickly and efficiently cool the plate and then recover the waste heat air, while having good sealing performance to reduce the dissipation of waste heat.

[0005] This application is implemented as follows: The present application provides a rapid cooling blowing device with waste heat recovery, which includes a blowing device shell with a cooling chamber provided therein, a bracket provided in the blowing device shell, an upper spray box and a lower spray box connected to the top and bottom of the bracket at intervals, and a cooling fan provided outside the blowing device shell, the bottom wall of the upper spray box and the top wall of the lower spray box are respectively provided with a plurality of cooling nozzles, the blowing device shell is connected to a plurality of rotatable rollers located between the upper spray box and the lower spray box, the rollers are arranged at intervals along the length direction of the blowing device shell, the air outlet of the cooling fan is respectively connected to the upper spray box and the lower spray box, the two ends of the blowing device shell are respectively provided with openings connected to the cooling chamber, the openings are connected to one-way opening and closing curtains, and the top of the blowing device shell is connected to a waste heat recovery air duct.

[0006] In some optional embodiments, the air outlet of the cooling fan is connected to a ventilation duct, and the ventilation duct is connected to the upper spray box and the lower spray box through the upper air supply duct and the lower air supply duct that pass through the shell of the spraying device respectively. The upper spray box and the lower spray box are respectively connected to the upper spray box pressure sensor and the lower spray box pressure sensor for detecting pressure, and the upper air supply duct and the lower air supply duct are respectively connected to the upper flow control valve and the lower flow control valve.

[0007] In some optional embodiments, the one-way opening and closing door curtain includes a fiber door curtain body whose four sides are respectively connected to openings, and a through hole is provided on the fiber door curtain body for the roller support plate to pass through. The bottom of the through hole is flush with the bottom surface of the roller support plate, and the top of the through hole is higher than or flush with the top surface of the roller support plate. The top of the through hole is hinged with a one-way fiber sealing curtain for closing the through hole.

[0008] In some optional implementation schemes, the waste heat recovery air duct is connected to a waste heat delivery pipe, and a waste heat temperature sensor is provided on the waste heat delivery pipe.

[0009] In some optional embodiments, a filter is provided on the waste heat transport pipe.

[0010] In some optional embodiments, a combustion-supporting fan is provided on the waste heat transport pipe.

[0011] In some optional implementation schemes, the waste heat delivery pipe is further connected to a pressure regulating pipe, which is provided with a pressure regulating valve, and the shell of the blowing device is connected to a waste heat pressure sensor for detecting the pressure in the cooling chamber.

[0012] In some optional embodiments, the bottom wall of one end of the blowing device shell is provided with a slag discharge port and a sealing plate for opening and closing the slag discharge port, the bottom of the blowing device shell is provided with a slag discharge plate extending along its width direction and a slag collecting mechanism for driving the slag discharge plate to move along the length direction of the blowing device shell, and the bottom of the slag discharge plate slides against the bottom wall of the blowing device shell.

[0013] In some optional embodiments, the slag collection mechanism includes a first drive motor and a screw connected to the output shaft of the first drive motor, the screw extends along the length direction of the blowing device shell, and the slag discharge plate is mounted on the screw through a threaded sleeve.

[0014] In some optional embodiments, a rotatable shaft is connected to one side of the slag discharge port, and a sealing plate is connected to the shaft. When the shaft rotates, it drives the sealing plate to open and close the slag discharge port. The shaft is connected to a second drive motor.

[0015] The beneficial effects of the present application are as follows: the rapid cooling blowing device with waste heat recovery provided in the present application includes a blowing device shell with a cooling chamber provided therein, a bracket provided in the blowing device shell, an upper spray box and a lower spray box connected to the top and bottom of the bracket at intervals, and a cooling fan provided outside the blowing device shell, the bottom wall of the upper spray box and the top wall of the lower spray box are respectively provided with a plurality of cooling nozzles, the blowing device shell is connected with a plurality of rotatable rollers located between the upper spray box and the lower spray box, the rollers are arranged at intervals along the length direction of the blowing device shell, the air outlet of the cooling fan is respectively connected to the upper spray box and the lower spray box, and openings connected to the cooling chamber are respectively provided at both ends of the blowing device shell, the openings are connected with one-way opening and closing curtains, and the top of the blowing device shell is connected with a waste heat recovery air duct. The rapid cooling spraying device with waste heat recovery provided in the present application can use the cooling fan to provide cold air through the upper spray box and the lower spray box to quickly and efficiently cool the plate supported by the rotating roller, and discharge the waste heat air after cooling through the waste heat recovery air duct for recovery, and at the same time use the one-way opening and closing curtain connected by the opening to seal the cooling chamber to prevent waste heat from escaping. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic cross-sectional structural diagram of a rapid cooling and blowing device with waste heat recovery provided in Example 1 of the present application from a first perspective; Figure 2 A schematic cross-sectional view of the rapid cooling and blowing device with waste heat recovery provided in Example 1 of the present application from a second perspective; Figure 3 This is a schematic structural diagram of the upper spray box in the rapid cooling and spraying device with waste heat recovery provided in Example 1 of the present application; Figure 4 A schematic structural diagram of the connection between the rapid cooling and blowing device with waste heat recovery provided in Example 1 of the present application and the waste heat delivery pipe and the pressure regulating pipe; Figure 5 This is a schematic cross-sectional structural diagram from the first perspective of the rapid cooling blowing device with waste heat recovery provided in Example 2 of the present application.

[0018] In the figure: 100, the shell of the blowing device; 101, the support leg of the blowing device; 110, the cooling chamber; 120, the opening; 130, the waste heat recovery air duct; 140, the waste heat pressure sensor; 150, the slag discharge port; 151, the rotating shaft; 152, the second driving motor; 160, the sealing plate; 170, the slag discharge plate; 180, the first driving motor; 190, the screw; 200, the bracket; 210, the upper spray box; 220, the lower spray box; 230, the cooling nozzle; 240, the rotating roller; 250, the upper spray box pressure sensor; 2 60. Lower spray box pressure sensor; 300. Cooling fan; 310. Ventilation duct; 320. Upper air supply duct; 330. Lower air supply duct; 340. Upper flow control valve; 350. Lower flow control valve; 360. Ventilation support foot; 400. One-way opening and closing curtain; 410. Fiber curtain body; 420. Through hole; 430. One-way fiber sealing curtain; 500. Waste heat conveying pipe; 510. Waste heat temperature sensor; 520. Filter; 530. Combustion-supporting fan; 540. Pressure regulating pipe; 550. Pressure regulating valve. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0022] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0024] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0025] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0026] The features and performance of the rapid cooling and blowing device with waste heat recovery of the present application are further described in detail below in conjunction with the embodiments.

[0027] Example 1 like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the embodiment of the present application provides a rapid cooling blowing device with waste heat recovery, which includes a blowing device shell 100 with a cooling chamber 110 therein, a bracket 200 arranged in the blowing device shell 100, an upper spray box 210 and a lower spray box 220 connected to the top and bottom of the bracket 200 at intervals, and a cooling fan 300 arranged outside the blowing device shell 100, the bottom of the bracket 200 is connected to the bottom wall of the cooling chamber 110, the upper spray box 210 and the lower spray box 220 are rectangular, and the bottom wall of the upper spray box 210 and the top wall of the lower spray box 220 are respectively provided with cooling nozzles 230 arranged at intervals, the blowing device shell 100 is connected to eleven rotatable rollers 240, the two ends of the rollers 240 are respectively connected to the two sides of the blowing device shell 100 by bearings, and the rollers 240 are located at the upper spray box 210 and the lower spray box 220. The cooling fans 300 are connected to the cooling chamber 110 at two ends thereof and are spaced apart along the length direction of the blowing device shell 100. The cooling chamber 110 is connected to the cooling chamber 110 at two ends thereof. The rollers 240 cooperate to support and transport the plate passing through the cooling chamber 110 through the opening 120. The air outlet of the cooling fan 300 is connected to the ventilation pipe 310. The ventilation pipe 310 is connected to the upper spray box 210 and the lower spray box 220 through the upper air supply pipe 320 and the lower air supply pipe 330 respectively passing through the blowing device shell 100. The top of the blowing device shell 100 is connected to the waste heat recovery air pipe 130. The upper spray box 210 and the lower spray box 220 are respectively connected to the upper spray box pressure sensor 250 and the lower spray box pressure sensor 260 for detecting pressure. The upper air supply pipe 320 and the lower air supply pipe 330 are respectively connected to the upper flow control valve 340 and the lower flow control valve 350.

[0028] Among them, the opening 120 is connected to a one-way opening and closing door curtain 400, which includes a fiber door curtain body 410 with four sides respectively connected to the opening 120. The fiber door curtain body 410 is provided with a through hole 420 for the roller 240 to support the plate to pass through. The bottom of the through hole 420 is flush with the bottom surface of the plate supported by the roller 240, and the top of the through hole 420 is higher than the top surface of the plate supported by the roller 240. The top of the through hole 420 is hinged with a one-way fiber sealing curtain 430 for closing the through hole 420; the waste heat recovery air duct 1 30 is connected to a waste heat delivery pipe 500, on which a waste heat temperature sensor 510, a filter 520 and a combustion-supporting fan 530 are sequentially provided; the waste heat delivery pipe 500 is also connected to a pressure regulating pipe 540, on which a pressure regulating valve 550 is provided; the blowing device housing 100 is connected to a waste heat pressure sensor 140 for detecting the pressure in the cooling chamber 110; eight blowing device legs 101 are connected to the bottom of the blowing device housing 100, and the ventilation pipe 310 is connected to two ventilation legs 360.

[0029] The rapid cooling blowing device with waste heat recovery provided in the embodiment of the present application can greatly accelerate the cooling rate without affecting the microstructure and properties of the heat-treated finished plate. When in use, one end of the blowing device shell 100 is directly installed on the unloading roller behind the heating furnace, which does not take up additional space and the original cooling bed equipment can be omitted after adding the fast cooling system behind the furnace, thereby greatly saving the total equipment floor space and reducing the equipment investment cost. After being heated in the heating furnace, the plate is transported by the unloading roller to the rotating roller 240 that passes through the opening 120 and enters the cooling chamber 110, and then moves through another opening 120 to enter the next process. At the same time, the cooling The cooling air is passed through the upper spray box 210 and the lower spray box 220 through the upper air supply duct 320 and the lower air supply duct 330 respectively. The cooling air is then ejected through the cooling nozzles 230 on the bottom wall of the upper spray box 210 and the top wall of the lower spray box 220 to perform uniform and stable spray cooling on the top and bottom surfaces of the plate supported and transported by the rotating roller 240. The gas after absorbing the waste heat from the surface of the plate is recycled through the waste heat recovery duct 130 connected to the top of the blowing device shell 100. The air with recovered heat is used to preheat the combustion air used for the burner of the heat treatment furnace, thereby reducing heat consumption.

[0030] The upper spray box 210 and the lower spray box 220 are rectangular to ensure uniformity during cooling, and the large air storage capacity of the rectangular upper spray box 210 and the lower spray box 220 can make the pressure and flow rate of the cold air sprayed by each nozzle more stable. Because the heat of the cooling air after heat exchange needs to be recovered and utilized, before the cooling air is sprayed into the spray device housing 100 and heat-exchanged with the plate and then enters the waste heat recovery duct 130 for recovery, in order to prevent the cooling air after heat exchange from escaping from the openings 120 at both ends of the waste heat recovery duct 130, a one-way opening and closing curtain 400 is provided at the openings 120 at both ends of the waste heat recovery duct 130. The one-way opening and closing curtain 400 includes a fiber curtain body 41 with four sides respectively connected to the openings 120. 0. A through hole 420 is provided on the fiber door curtain body 410 for the roller 240 to support the plate to pass through. The top of the through hole 420 is hinged with a unidirectional fiber sealing curtain 430 for closing the through hole 420. When the plate moves, the unidirectional fiber sealing curtain 430 is pushed to be erected on the top surface of the plate and slides relative to the plate to achieve sealing, thereby ensuring that the plate passes through the through hole 420 while ensuring that the unidirectional fiber sealing curtain 430 and the plate cooperate to achieve sealing, preventing the cold air after heat exchange from escaping, and further improving the heat recovery efficiency.

[0031] The waste heat recovery air duct 130 is connected to the waste heat delivery pipe 500, on which the waste heat delivery pipe 500 is sequentially provided with a waste heat temperature sensor 510, a filter 520 and a combustion-supporting fan 530. The waste heat delivery pipe 500 is also connected to a pressure regulating pipe 540, on which a pressure regulating valve 550 is provided. In order to ensure the stability of the operation of the entire heat recovery system, the blowing device shell 100 is connected to a waste heat pressure sensor 140 for detecting the pressure in the cooling chamber 110. The opening of the pressure regulating valve 550 provided on the pressure regulating pipe 540 is controlled according to the feedback value of the pressure detected by the waste heat pressure sensor 140. The external air is passed into the waste heat delivery pipe 500 through the pressure regulating pipe 540 through the combustion-supporting fan 530 and delivered to the burner, ensuring that the pressure of the air delivered by the waste heat delivery pipe 500 is stable, and avoiding excessive pressure changes in the blowing device shell 100 due to excessive or insufficient consumption of combustion-supporting air passing through the waste heat delivery pipe 500. A waste heat temperature sensor 510 and a filter 520 are sequentially provided on the waste heat delivery pipe 500. The filter 520 is used to filter iron oxide and other impurities in the wind to prevent blockage of the pipe in front of the burner. The waste heat temperature sensor 510 is used in conjunction with the pressure regulating valve 550. When the temperature approaches the upper limit of the combustion-supporting fan, the opening of the pressure regulating valve 550 is controlled to increase the flow rate of external cold air to reduce the temperature of the air delivered by the waste heat delivery pipe 500.

[0032] Because different heat treatment processes often correspond to different products and temperatures, different products will have an upper cooling speed limit at different temperatures. In order to avoid the forced spray cooling process affecting the performance of the heat-treated steel plate, the upper spray box 210 and the lower spray box 220 are respectively connected to the upper spray box pressure sensor 250 and the lower spray box pressure sensor 260 for detecting pressure, and the upper air supply duct 320 and the lower air supply duct 330 are respectively connected to the upper flow control valve 340 and the lower flow control valve 350. The cooling air volume is adjusted by controlling the frequency of the cooling fan 300, and the wind speed of the cooling nozzle 230 of the upper spray box 210 and the lower spray box 220 is adjusted by controlling the upper flow control valve 340 and the lower flow control valve 350.

[0033] Eight blowing device feet 101 are connected to the bottom of the blowing device shell 100, and two ventilation feet 360 are connected to the ventilation pipe 310. The blowing device feet 101 and the ventilation feet 360 can be used to stably support the blowing device shell 100 and the ventilation pipe 310 to ensure the stable progress of the cooling operation and the waste heat recovery operation.

[0034] Example 2 like Figure 5 As shown, the embodiment of the present application provides a rapid cooling blowing device with waste heat recovery, which has a structure roughly the same as that of the rapid cooling blowing device with waste heat recovery provided in Example 1, except that, in this embodiment, the bottom of the bracket 200 is not connected to the bottom wall of the cooling chamber 110, but the two sides of the bottom of the bracket 200 are respectively connected to the two side walls of the cooling chamber 110, and the bottom of the blowing device shell 100 is provided with a slag discharge plate 170 extending along its width direction and a slag collecting mechanism for driving the slag discharge plate 170 to move along the length direction of the blowing device shell 100, and the bottom of the slag discharge plate 170 slides against the blowing device shell 100. The bottom wall, the slag collection mechanism includes a first drive motor 180 and a screw rod 190 connected to the output shaft of the first drive motor 180. The screw rod 190 extends along the length direction of the blowing device shell 100, and the slag discharge plate 170 is arranged on the screw rod 190 through a threaded sleeve; the bottom wall of one end of the blowing device shell 100 is provided with a slag discharge port 150 and a sealing plate 160 for opening and closing the slag discharge port 150. A rotatable rotating shaft 151 is connected to one side of the slag discharge port 150, and a rotatable rotating shaft 151 is connected to one side of the sealing plate 160. When the rotating shaft 151 rotates, it drives the sealing plate 160 to open and close the slag discharge port 150. The rotating shaft 151 is connected to the second drive motor 152.

[0035] The rapid cooling blowing device with waste heat recovery provided by the embodiment of the present application is provided with a slag discharge plate 170 extending along the width direction of the bottom of the blowing device shell 100, which can facilitate the operator to control the first drive motor 180 to start and drive the screw rod 190 to rotate, thereby driving the slag discharge plate 170 which is threadedly sleeved on the screw rod 190 to move along the length direction of the blowing device shell 100 to push the iron oxide scale and impurities accumulated on the bottom wall of the cooling chamber 110 of the blowing device shell 100 to above the slag discharge port 150 on the bottom wall of one end of the blowing device shell 100. At this time, the second drive motor 152 can be controlled to start and drive the rotating shaft 151 to rotate and drive the sealing plate 160 to rotate to open the slag discharge port 150, so that The slag discharge plate 170 pushes the accumulated iron oxide scale and impurities above the slag discharge port 150 to be discharged and collected through the slag discharge port 150, and then the second drive motor 152 is controlled to start and drive the rotating shaft 151 to rotate in the opposite direction to drive the sealing plate 160 to rotate in the opposite direction to close the slag discharge port 150, and the first drive motor 180 is controlled to start and drive the screw rod 190 to rotate in the opposite direction, thereby driving the slag discharge plate 170 threadedly mounted on the screw rod 190 to move in the opposite direction along the length direction of the blowing device shell 100 and reset, so as to clean and discharge the iron oxide scale and impurities generated by the blowing on the bottom wall of the cooling chamber 110 of the blowing device shell 100, thereby avoiding the accumulation of iron oxide scale and impurities affecting the continuous progress of the cooling operation and improving the operation efficiency.

[0036] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

Claims

1. A rapid cooling and blowing device with waste heat recovery, characterized in that: It includes a blowing device shell with a cooling chamber provided therein, a bracket provided in the blowing device shell, an upper spray box and a lower spray box connected to the top and bottom of the bracket at intervals in the upper and lower directions, and a cooling fan provided outside the blowing device shell, the bottom wall of the upper spray box and the top wall of the lower spray box are respectively provided with a plurality of cooling nozzles, the blowing device shell is connected with a plurality of rotatable rollers located between the upper spray box and the lower spray box, the rollers are arranged at intervals along the length direction of the blowing device shell, the air outlet of the cooling fan is respectively connected to the upper spray box and the lower spray box, the two ends of the blowing device shell are respectively provided with openings connected to the cooling chamber, the openings are connected with one-way opening and closing curtains, and the top of the blowing device shell is connected with a waste heat recovery air duct.

2. The rapid cooling and blowing device with waste heat recovery according to claim 1 is characterized in that: The air outlet of the cooling fan is connected to a ventilation duct, and the ventilation duct is connected to the upper spray box and the lower spray box through an upper air supply duct and a lower air supply duct that pass through the shell of the blowing device respectively. The upper spray box and the lower spray box are respectively connected to an upper spray box pressure sensor and a lower spray box pressure sensor for detecting pressure, and the upper air supply duct and the lower air supply duct are respectively connected to an upper flow control valve and a lower flow control valve.

3. The rapid cooling and blowing device with waste heat recovery according to claim 1 is characterized in that: The one-way opening and closing door curtain includes a fiber door curtain body whose four sides are respectively connected to the opening. A through hole is provided on the fiber door curtain body for the roller support plate to pass through. The bottom of the through hole is flush with the bottom surface of the roller support plate, and the top of the through hole is higher than or flush with the top surface of the roller support plate. The top of the through hole is hinged with a one-way fiber sealing curtain for closing the through hole.

4. The rapid cooling and blowing device with waste heat recovery according to claim 1 is characterized in that: The waste heat recovery air duct is connected to a waste heat delivery pipe, and a waste heat temperature sensor is provided on the waste heat delivery pipe.

5. The rapid cooling and blowing device with waste heat recovery according to claim 4 is characterized in that: The waste heat transport pipe is provided with a filter.

6. The rapid cooling and blowing device with waste heat recovery according to claim 4 is characterized in that: A combustion-supporting fan is provided on the waste heat conveying pipe.

7. The rapid cooling and blowing device with waste heat recovery according to claim 4 is characterized in that: The waste heat delivery pipe is further connected to a pressure regulating pipe, on which a pressure regulating valve is provided, and the shell of the blowing device is connected to a waste heat pressure sensor for detecting the pressure in the cooling cavity.

8. The rapid cooling and blowing device with waste heat recovery according to claim 1 is characterized in that: The bottom wall of one end of the blowing device shell is provided with a slag discharge port and a sealing plate for opening and closing the slag discharge port. The bottom of the blowing device shell is provided with a slag discharge plate extending along its width direction and a slag collecting mechanism for driving the slag discharge plate to move along the length direction of the blowing device shell. The bottom of the slag discharge plate slides and presses against the bottom wall of the blowing device shell.

9. The rapid cooling and blowing device with waste heat recovery according to claim 8, characterized in that: The slag collecting mechanism includes a first drive motor and a screw connected to the output shaft of the first drive motor. The screw extends along the length direction of the shell of the blowing device, and the slag discharge plate is sleeved on the screw by a thread.

10. The rapid cooling and blowing device with waste heat recovery according to claim 8, characterized in that: One side of the slag discharge port is connected to a rotatable shaft, and one side of the sealing plate is connected to the shaft. When the shaft rotates, it drives the sealing plate to open and close the slag discharge port. The shaft is connected to a second drive motor.

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