A device for recycling calcination waste heat of desulfurization gypsum

Abstract

This invention discloses a device for reusing waste heat from the calcination of desulfurized gypsum, comprising: a hot air main pipe and a turning mechanism. The hot air main pipe is located directly above the conveyor belt and is used to supply hot air to the desulfurized gypsum being conveyed. The hot air main pipe includes multiple hot air branch pipes arranged in an array along the conveyor belt's transmission direction. The turning mechanism is mounted above the conveyor belt via suspensions on both sides of the conveyor belt and is used to turn the desulfurized gypsum. The turning mechanism includes a turning vertical rod facing the conveyor belt. The end of the turning vertical rod is provided with a concave plate that abuts against the conveyor belt's conveying surface. The concave portion of the concave plate faces the conveyor belt to accommodate a portion of the desulfurized gypsum passing through. The two side walls of the concave plate have wedge-shaped structures facing the conveyor belt. By setting up the turning mechanism, this invention causes the desulfurized gypsum powder to turn during the conveyor belt's transmission process, so that it is heated evenly when receiving hot air from the hot air branch pipes, resulting in better drying effects for materials at different thickness levels.

Description

Technical Field

[0001] This invention relates to the field of paper-faced gypsum board manufacturing technology, specifically to a device for reusing waste heat from the calcination of desulfurized gypsum. Background Technology

[0002] Desulfurized gypsum powder itself has a high moisture content, with the normal moisture content of desulfurized gypsum entering the plant being around 12%. After calcination and roasting, desulfurized gypsum is finally transformed into the building gypsum powder we need. This process requires a large amount of heat to heat the gypsum powder and evaporate the moisture. Therefore, increasing the initial temperature and reducing the moisture content of desulfurized gypsum plays a key role in reducing the energy consumption of calcining gypsum powder.

[0003] During the calcination process of desulfurized gypsum powder, the temperature of the gypsum powder after the two-step calcination reaches as high as 160℃. After being cooled by the cooler, the temperature drops to below 100℃. The air heat transfer medium used for cooling the gypsum powder is also heated to above 80℃ by the gypsum powder. In order to avoid the waste of heat energy in this process, the hot air exhausted from the cooler is usually used to preheat and dehydrate the desulfurized gypsum that is about to be calcined and roasted on the conveyor belt, so that its temperature is increased by more than 8℃ and its moisture content is reduced by more than 1% before entering the calcination system.

[0004] Therefore, it is necessary to provide a device for reusing waste heat from the calcination of desulfurized gypsum to solve the problem that the drying effect of gypsum powder using hot air drying in the existing technology is not good and that gypsum powder at different thickness levels cannot be dried by hot air. Summary of the Invention

[0005] The purpose of this invention is to provide a device for reusing waste heat from the calcination of desulfurized gypsum, so as to solve the problem that the drying effect of gypsum powder using hot air drying in the prior art is not good, and that gypsum powder at different thickness levels cannot be dried by hot air.

[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0007] In a first aspect of the invention, a device for reusing waste heat from the calcination of desulfurized gypsum is provided, comprising: a hot air main pipe disposed directly above a conveyor belt for supplying hot air to the conveyed desulfurized gypsum, the hot air main pipe including a plurality of hot air branch pipes arranged in an array along the conveying direction of the conveyor belt; a turning mechanism, which is mounted above the conveyor belt via suspensions disposed on both sides of the conveyor belt for turning the desulfurized gypsum, the turning mechanism including turning vertical rods disposed towards the conveyor belt to obstruct the conveying of the desulfurized gypsum, thereby causing the desulfurized gypsum to turn towards both sides of the turning vertical rods; wherein, the end of the turning vertical rod is provided with a concave plate abutting against the conveying surface of the conveyor belt, the concave portion of the concave plate facing the conveyor belt to accommodate a portion of the desulfurized gypsum to pass through, thereby changing the accumulation thickness of the desulfurized gypsum; the two side walls of the concave plate have wedge-shaped structures facing the conveyor belt to reduce the contact area between the concave plate and the conveying surface of the conveyor belt.

[0008] Furthermore, the concave plate has rollers on its sidewalls that abut against the conveyor belt surface; wherein, the inlet end of the concave plate is provided with a baffle plate for preventing desulfurized gypsum from entering below the rollers, and the baffle plate gradually bends upward along the conveyor belt direction to form a guiding surface for the desulfurized gypsum.

[0009] Furthermore, the concave plate includes a mounting plate and two side plates symmetrically arranged below the mounting plate, with a base sleeve nested outside the side plates; wherein, steel balls are provided on the side walls of the side plates, and the sliding grooves for accommodating the sliding of the steel balls are provided on the side walls of the base sleeve, thereby enabling the side plates to slide relative to the base sleeve.

[0010] Furthermore, the groove is provided with multiple limiting protrusions, and the bottom of the steel ball is pressed against a stop block, which has a concave surface for embedding the steel ball; wherein, the side wall of the stop block is provided with an elastic element fixed to the side plate, so that the side plate can be locked after sliding relative to the base sleeve.

[0011] Furthermore, the end of the turning vertical rod is provided with an inclined plate that slopes upward along the conveyor belt transmission direction, and the bottom end of the inclined plate abuts against the conveyor surface of the conveyor belt; wherein, the inclined plate is provided with multiple transverse hollow grooves, and the length of the hollow grooves gradually decreases along the conveyor belt transmission direction.

[0012] Furthermore, the end of the turning vertical rod is provided with a bendable guide plate, which can be bent into a wing surface for the desulfurized gypsum to climb under the squeezing action of the desulfurized gypsum; wherein, the top end face of the guide plate is axially connected to the end of the turning vertical rod, and the guide plate can be deflected under the squeezing and pushing action of the desulfurized gypsum.

[0013] Furthermore, the end of the turning vertical rod is provided with a shaft-connected extrusion block, which can generate elastic deformation under the action of external force; wherein, the extrusion block is located in the internal space formed by the bending of the guide plate and is fixedly connected to the inner wall of the guide plate, so that the guide plate can recover to the extended state by utilizing the elastic deformation of the extrusion block.

[0014] Furthermore, the ends of the guide plates are connected by elastic element two, thus enabling the guide plates to operate in the following two modes during the transport of desulfurized gypsum:

[0015] First working condition: The amount of desulfurized gypsum accumulation is small, the pressure on the guide plate is insufficient and it is in an extended state, and the desulfurized gypsum climbs along the surface of the guide plate.

[0016] Second working condition: The amount of desulfurized gypsum is large, and the pressure on the guide plate is sufficient to make it bend. The desulfurized gypsum pushes the guide plate to compress the elastic element 2 and the extrusion block. The lateral obstruction range of the guide plate on the desulfurized gypsum is reduced. Some of the desulfurized gypsum climbs along the surface of the guide plate and passes through, while the other part of the desulfurized gypsum continues to adhere to the conveyor belt without being obstructed by the guide plate.

[0017] Furthermore, heat storage boxes are installed on both sides of the conveyor belt, and the hot air main pipe runs through the top of the heat storage box.

[0018] Furthermore, the outlet end of the hot air main pipe is equipped with an air guide hood, the interior of which is horizontally divided by a partition, through which multiple hot air branch pipes are arranged in an array centered on the hot air main pipe; wherein, the width of the air guide hood is greater than that of the hot air main pipe.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The present invention aims to make the desulfurized gypsum powder tumble during the conveyor belt transmission by setting up a turning mechanism, so that it is heated evenly when receiving hot air blown out by the hot air pipe, so that materials at different thickness levels can obtain better drying effect. Attached Figure Description

[0021] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0022] Figure 1 A schematic diagram of a device for reusing waste heat from the calcination of desulfurized gypsum provided by the present invention;

[0023] Figure 2 for Figure 1 Enlarged view of section I;

[0024] Figure 3 for Figure 2 The diagram shows a structural schematic of the material turning mechanism in one embodiment of the present invention.

[0025] Figure 4 for Figure 3 Another perspective view;

[0026] Figure 5 for Figure 4 Enlarged view of section II;

[0027] Figure 6 for Figure 2 The diagram shows a structural schematic of the material turning mechanism in one embodiment of the present invention.

[0028] Figure 7 for Figure 6 Exploded view;

[0029] Figure 8 for Figure 7 Enlarged view of section III;

[0030] Figure 9 for Figure 6 Perspective view from the side;

[0031] Figure 10 for Figure 9 Enlarged view of section IV;

[0032] Figure 11 for Figure 2 The diagram shows a structural schematic of the material turning mechanism in one embodiment of the present invention.

[0033] Figure 12 for Figure 2 The diagram shows a structural schematic of the material turning mechanism in one embodiment of the present invention.

[0034] Figure 13 for Figure 12 Perspective view;

[0035] Figure 14 for Figure 13 Enlarged view of CV;

[0036] Figure 15 for Figure 12 Another perspective view;

[0037] Figure 16 for Figure 15 Enlarged view of VI;

[0038] Figure 17 This is a schematic diagram of another embodiment of a device for reusing waste heat from the calcination of desulfurized gypsum provided by the present invention;

[0039] Figure 18 for Figure 17 Side view;

[0040] Figure 19 This is a perspective view of the air guide cover in one embodiment of the present invention.

[0041] The labels in the diagram represent the following:

[0042] 10. Hot air main duct; 11. Hot air branch duct; 20. Tilting mechanism; 21. Tilting vertical rod; 211. Concave plate; 212. Roller; 213. Baffle plate; 214. Mounting plate; 215. Side plate; 216. Steel ball; 217. Abutment block; 218. Concave surface; 219. Elastic element one; 22. Base sleeve; 221. Slide groove; 222. Limiting protrusion; 23. Inclined plate; 231. Hollow groove; 24. Guide plate; 241. Elastic element two; 25. Extrusion block; 30. Conveyor belt; 40. Suspension; 50. Heat storage box; 60. Air guide cover; 61. Partition plate. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] like Figure 1-2 As shown, the present invention provides a device for reusing waste heat from the calcination of desulfurized gypsum, comprising:

[0045] Hot air main duct 10 is located directly above the conveyor belt 30 and is used to supply hot air to the desulfurized gypsum being transported. Hot air main duct 10 includes a plurality of hot air branch pipes 11 arranged in an array along the conveying direction of the conveyor belt.

[0046] The material turning mechanism 20 is mounted above the conveyor belt 30 via suspensions 40 on both sides of the conveyor belt 30 for turning over the desulfurized gypsum. The material turning mechanism 20 includes a material turning vertical bar 21 facing the conveyor belt 30 to obstruct the conveying of the desulfurized gypsum, thereby turning the desulfurized gypsum to both sides of the material turning vertical bar 21.

[0047] The present invention aims to make the desulfurized gypsum powder tumble during the transmission of the conveyor belt 30 by setting the turning mechanism 20, so that it is heated evenly when receiving the hot air blown out of the hot air pipe 11, so that materials at different thickness levels can obtain better drying effect.

[0048] In one embodiment of the present invention, a separately configured turning vertical rod 21 is included, which plays a turning role in the material conveying process. However, when the material is obstructed by the columnar turning vertical rod 21, it will first pass through in two streams from the position attached to its periphery. The two material streams between two adjacent turning vertical rods 21 meet and re-form a thicker material stream. The overall distribution of the material on the conveyor belt 30 presents a situation of several material piles with triangular prism cross sections, resulting in the material being thicker in the middle and too low on both sides. Although it increases the total heating area of ​​the material to a certain extent, its heating method for the material is still limited to surface heating. When the obstruction effect of the turning vertical rod 21 acts on the material alone, the thickness of the material actually becomes more uneven. It cannot penetrate into the inner layer of the material, nor can it ensure the overall heating uniformity of the material, which is not conducive to improving the drying effect.

[0049] To resolve the above issues, please continue reading Figure 2 In a preferred embodiment of the present invention based on the above embodiments, the end of the turning vertical rod 21 is provided with a concave plate 211 that abuts against the conveying surface of the conveyor belt 30. The concave surface 218 of the concave plate 211 faces the conveyor belt 30 to accommodate part of the desulfurized gypsum to pass through, thereby changing the accumulation thickness of the desulfurized gypsum.

[0050] The two side walls of the concave plate 211 have wedge-shaped structures facing the conveyor belt 30 to reduce the contact area between the concave plate 211 and the conveyor surface of the conveyor belt 30.

[0051] In this embodiment, by setting the concave plate 211, the amount of desulfurized gypsum powder passing through the concave part of the concave plate 211 can be controlled by the preset height of the concave part, avoiding the material from accumulating too thickly on both sides of the concave plate 211. This helps to improve the thickness uniformity of the material when it is transported on the conveyor belt 30, and makes the overall heating degree of the material tend to be stable. In this embodiment, the wedge-shaped structure at the ends of the two side walls of the concave plate 211 is further used to reduce the friction when it slides on the conveyor belt 30, thereby reducing the wear and tear on the conveyor belt 30.

[0052] In the above embodiments, the service life of the concave plate 211 and the conveyor belt 30 is greatly reduced due to the continuous sliding friction generated between them.

[0053] To solve the above problems, such as Figure 3-5 As shown, in another embodiment provided by the present invention, the side wall of the concave plate 211 is provided with a roller 212 that abuts against the conveying surface of the conveyor belt 30.

[0054] The concave plate 211 has a baffle plate 213 at its inlet end to prevent desulfurized gypsum from entering below the roller 212. The baffle plate 213 gradually bends upward along the transmission direction of the conveyor belt 30 to form a guiding surface for the desulfurized gypsum.

[0055] In this embodiment, the sliding friction between the concave plate 211 and the conveyor belt 30 is changed to rolling friction by the setting of the roller 212, which greatly reduces the frictional resistance and reduces the wear of the parts. However, since the roller 212 rotates in the same direction as the material conveying under the action of the conveyor belt 30, the material is very likely to accumulate and get stuck in the upstream direction of the roller 212, thereby affecting the relative movement between the concave plate 211 and the conveyor belt 30. Based on the above problems, this embodiment also sets the baffle plate 213 so that the material is guided upward to a certain height when it first enters the area below the concave plate 211, which can prevent the desulfurized gypsum powder from directly entering the area below the roller 212 and getting stuck, thus preventing it from rotating.

[0056] In the above embodiments, the size of the concave space of the concave plate 211 is fixed, and the thickness of the material that can be accommodated below it is completely limited. In actual use, it is not conducive to adjusting the corresponding material thickness according to the humidity of the desulfurized gypsum powder. That is, it is not possible to lower the highest point of the concave plate 211 when the material humidity is high, thereby reducing the thickness of the material transported below it and increasing the drying efficiency; or to raise the highest point of the concave plate 211 when the material humidity is low, thereby increasing the thickness of the material transported below it and improving the transport efficiency.

[0057] To solve the above problems, such as Figure 6-8 As shown, in another embodiment of the present invention, the concave plate 211 includes a mounting plate 214 and two side plates 215 symmetrically disposed below the mounting plate 214, and a base sleeve 22 is nested outside the side plates 215.

[0058] The side plate 215 has a steel ball 216 on its side wall, and the base sleeve 22 has a groove 221 on its side wall to accommodate the sliding of the steel ball 216, so that the side plate 215 can slide relative to the base sleeve 22.

[0059] Furthermore, in order for the base sleeve 22 to be able to lock into any position on the side plate 215, please refer to... Figure 9-10 The groove 221 is provided with multiple limiting protrusions 222, and the bottom of the steel ball 216 is pressed against a stop block 217, which has a concave surface 218 for embedding the steel ball 216.

[0060] Among them, the side wall of the abutment 217 is provided with an elastic element 219 that is fixedly connected to the side plate 215, so that the side plate 215 can be locked after sliding relative to the base sleeve 22.

[0061] In this embodiment, the depth of the concave plate 211 embedded in the base sleeve 22 is used to improve the adjustability of the thickness of the material conveyed below the concave plate 211, which can ensure a good drying effect during the drying process of materials with different moisture levels.

[0062] To improve the uniformity of the desulfurized gypsum powder thickness and achieve better drying results, methods different from those described in the above embodiments are used, such as... Figure 11 As shown, in another embodiment of the present invention, the end of the turning vertical rod 21 is provided with an inclined plate 23 that is inclined upward along the conveying direction of the conveyor belt 30, and the bottom end of the inclined plate 23 abuts against the conveying surface of the conveyor belt 30.

[0063] The inclined plate 23 is provided with multiple transverse hollow grooves 231, and the length of the hollow grooves 231 gradually decreases along the conveying direction of the conveyor belt 30.

[0064] In this embodiment, by setting the inclined plate 23, the material is divided into multiple layers of material flow when passing through the hollow groove 231 during transmission, which improves the drying effect of the inner layer of desulfurized gypsum powder.

[0065] To further achieve the above objectives, such as Figure 12 As shown, in another embodiment of the present invention, the end of the turning vertical rod 21 is provided with a bendable guide plate 24, which can be bent into a wing surface for the desulfurized gypsum to climb under the squeezing action of the desulfurized gypsum.

[0066] The top end face of the guide plate 24 is axially connected to the end of the turning vertical rod 21, and the guide plate 24 can be deflected under the squeezing and pushing action of the desulfurized gypsum.

[0067] In this embodiment, the guide plate 24, which is axially connected to the end of the turning vertical rod 21, bends first under the pressure of the material to form a wing surface that guides the material upward, thereby causing the bottom material to move upward and the surface material to move downward, thus improving the heating uniformity of the desulfurized gypsum powder. In addition, when the guide plate 24 is subjected to uneven force under the squeezing and pushing action of the desulfurized gypsum on both sides, it is prone to deviation, which can disturb the material and improve the turning effect.

[0068] Please continue reading. Figure 13-16 The end of the turning vertical rod 21 is provided with a shaft-connected extrusion block 25, which can produce elastic deformation under the action of external force;

[0069] The extrusion block 25 is located in the internal space formed by the bending of the guide plate 24 and is fixed to the inner wall of the guide plate 24, so that the guide plate 24 can be restored to the extended state by the elastic deformation of the extrusion block 25.

[0070] Please continue reading. Figure 13-16The ends of the guide plates 24 are connected by an elastic element 241, so that the guide plates 24 have the following two working conditions during the transmission of desulfurized gypsum:

[0071] First working condition: The amount of desulfurized gypsum accumulation is small, the pressure on the guide plate 24 is insufficient and it is in an extended state, and the desulfurized gypsum climbs and passes along the surface of the guide plate 24.

[0072] Second working condition: The amount of desulfurized gypsum is large, and the pressure on the guide plate 24 is sufficient to make it bend. The desulfurized gypsum pushes the guide plate 24 to compress the elastic element 241 and the extrusion block 25. The lateral obstruction range of the guide plate 24 on the desulfurized gypsum is reduced. Some of the desulfurized gypsum climbs along the surface of the guide plate 24 and passes through, while the other part of the desulfurized gypsum continues to adhere to the conveyor belt 30 without being obstructed by the guide plate 24.

[0073] In this embodiment, the setting of elastic element 241 and extrusion block 25 not only increases the bending strength of guide plate 24, but also enables it to recover to its initial state through elastic deformation. Furthermore, it can automatically adjust its lateral obstruction range on the material according to the amount of material accumulation during the material transmission process, thereby improving the uniformity of material thickness and the smoothness of material transmission.

[0074] Please see Figure 17-18 In some embodiments of the present invention, heat storage boxes 50 may be provided on both sides of the conveyor belt 30, and the hot air main pipe 10 passes through the top of the heat storage box 50, thereby slowing down the heat loss acting on the desulfurized gypsum powder area.

[0075] Please see Figure 19 In some embodiments of the present invention, a guide hood 60 may be provided at the air outlet end of the hot air main duct 10. The interior of the guide hood 60 is laterally divided by a partition 61, and multiple hot air branch pipes 11 are arranged in an array around the hot air main duct 10 through the partition 61. The width of the guide hood 60 is greater than that of the hot air main duct 10, thereby dividing the hot air into multiple streams that are directed toward the desulfurized gypsum powder, thereby improving the coverage of the hot air.

[0076] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A device for reusing waste heat from the calcination of desulfurized gypsum, characterized in that, include: Hot air main pipe (10), which is located directly above the conveyor belt (30) for supplying hot air to the desulfurized gypsum being transported; The material turning mechanism (20) is mounted above the conveyor belt (30) via suspensions (40) on both sides of the conveyor belt (30) for turning over desulfurized gypsum. The material turning mechanism (20) includes a material turning vertical bar (21) facing the conveyor belt (30) to obstruct the conveying of desulfurized gypsum, thereby turning the desulfurized gypsum to both sides of the material turning vertical bar (21). The end of the turning vertical rod (21) is provided with a concave plate (211) that abuts against the conveying surface of the conveyor belt (30). The concave part of the concave plate (211) faces the conveyor belt (30) to accommodate some desulfurized gypsum to pass through, thereby changing the accumulation thickness of the desulfurized gypsum. The concave plate (211) has wedge-shaped structures on both sides facing the conveyor belt (30) to reduce the contact area of ​​the concave plate (211) against the conveyor surface of the conveyor belt (30). The concave plate (211) has a roller (212) on its side wall that abuts against the conveying surface of the conveyor belt (30). The concave plate (211) has a baffle plate (213) at the inlet end to prevent desulfurized gypsum from entering below the roller (212). The baffle plate (213) gradually bends upward along the transmission direction of the conveyor belt (30) to form a guiding surface for the desulfurized gypsum.

2. The device for reusing waste heat from desulfurized gypsum calcination according to claim 1, characterized in that, The concave plate (211) includes a mounting plate (214) and two side plates (215) symmetrically arranged below the mounting plate (214), and a base sleeve (22) is nested outside the side plate (215). The side plate (215) is provided with a steel ball (216) on its side wall, and the base sleeve (22) is provided with a groove (221) on its side wall to accommodate the sliding of the steel ball (216), so that the side plate (215) can slide relative to the base sleeve (22).

3. The device for reusing waste heat from desulfurized gypsum calcination according to claim 2, characterized in that, The groove (221) is provided with multiple limiting protrusions (222), and the bottom of the steel ball (216) is pressed against a stop block (217), and the stop block (217) has a concave surface (218) for embedding the steel ball (216). The side wall of the abutment (217) is provided with an elastic element (219) that is fixedly connected to the side plate (215), so that the side plate (215) can be locked after sliding relative to the base sleeve (22).

4. The device for reusing waste heat from desulfurized gypsum calcination according to claim 1, characterized in that, The end of the turning vertical rod (21) is provided with an inclined plate (23) that is inclined upward along the conveying direction of the conveyor belt (30), and the bottom end of the inclined plate (23) abuts against the conveying surface of the conveyor belt (30); The inclined plate (23) is provided with multiple transverse hollow grooves (231), and the length of the hollow grooves (231) gradually decreases along the conveying direction of the conveyor belt (30).

5. The device for reusing waste heat from the calcination of desulfurized gypsum according to claim 1, characterized in that, The end of the turning vertical rod (21) is provided with a bendable guide plate (24), which can be bent into a wing surface for the desulfurized gypsum to climb under the squeezing action of the desulfurized gypsum. The top end face of the guide plate (24) is axially connected to the end of the turning vertical rod (21), and the guide plate (24) can be deflected under the squeezing action of the desulfurized gypsum.

6. The device for reusing waste heat from the calcination of desulfurized gypsum according to claim 5, characterized in that, The end of the turning vertical rod (21) is provided with a shaft-connected extrusion block (25), which can generate elastic deformation under the action of external force; The extrusion block (25) is located in the internal space formed by the bending of the guide plate (24) and is fixed to the inner wall of the guide plate (24), so that the guide plate (24) can be restored to the extended state by the elastic deformation of the extrusion block (25).

7. The device for reusing waste heat from the calcination of desulfurized gypsum according to claim 6, characterized in that, The ends of the guide plates (24) are connected by an elastic element (241), so that the guide plates (24) have the following two working conditions during the transport of desulfurized gypsum: First working condition: The amount of desulfurized gypsum accumulation is small, the pressure on the guide plate (24) is insufficient and it is in an extended state, and the desulfurized gypsum climbs along the surface of the guide plate (24) and passes through; Second working condition: The amount of desulfurized gypsum is large, and the pressure on the guide plate (24) is sufficient to make it bend. The desulfurized gypsum pushes the guide plate (24) to compress the elastic element (241) and the extrusion block (25). The lateral obstruction range of the guide plate (24) on the desulfurized gypsum is reduced. Some of the desulfurized gypsum climbs along the surface of the guide plate (24) and passes through, while the other part of the desulfurized gypsum continues to be attached to the conveyor belt (30) without being obstructed by the guide plate (24).

8. A device for reusing waste heat from the calcination of desulfurized gypsum according to any one of claims 1-7, characterized in that, The conveyor belt (30) is covered with heat storage boxes (50) on both sides, and the hot air main pipe (10) passes through the top of the heat storage box (50).

9. A device for reusing waste heat from the calcination of desulfurized gypsum as described in claim 8, characterized in that, The air outlet end of the hot air main pipe (10) is provided with an air guide hood (60). The interior of the air guide hood (60) is horizontally divided by a partition (61). Multiple hot air branch pipes (11) are arranged in an array around the hot air main pipe (10) through the partition (61). The width of the air guide shroud (60) is greater than that of the hot air main duct (10).

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