Production device for calcining high-temperature anhydrous gypsum

Abstract

The invention discloses a production device for calcining high-temperature anhydrous gypsum, and relates to the technical field of gypsum production. Comprising a rotary kiln; a heat exchange structure is arranged in the rotary kiln and comprises a supporting shaft penetrating through the rotary kiln, and the position of the supporting shaft is lower than the axis position of the rotary kiln. A plurality of sleeves are rotationally installed on the supporting shaft, torsion springs are connected between the sleeves and the supporting shaft, and the sleeves are connected with material guiding shovels through connecting rods. A plurality of frying plates are arranged in the rotary kiln; the heat exchange structure comprises a recovery tank located on one side in the rotary kiln, a plurality of discharging pipes are installed on the recovery tank, and the discharging pipes point to the side, away from the recovery tank, in the rotary kiln in a twisted shape. The supporting shaft and the recycling groove are fixedly connected with a kiln head cover and a kiln tail smoke chamber at the two ends of the rotary kiln. According to the device, the heat utilization rate can be remarkably increased, the energy consumption is reduced, and the yield of anhydrous gypsum is increased.

Description

Technical Field

[0001] The invention relates to the technical field of gypsum production, in particular to a production device for calcining high-temperature anhydrous gypsum. Background Art

[0002] Gypsum is a widely distributed mineral whose chemical composition is calcium sulfate dihydrate. Its naturally formed crystals are white in their pure state, but may also appear yellow, red, brown, etc. due to impurities. Gypsum has a wide range of applications, from building materials to sculpture materials, to soil conditioners, and even in the fields of food and medicine. Among them, gypsum board is widely used in modern buildings due to its excellent sound insulation, fire resistance, and simple construction. Calcium sulfate is the main component of gypsum, but it also exists in anhydrous or semi-hydrated form. Anhydrous calcium sulfate is relatively rare in nature, while anhydrous gypsum stone is formed when gypsum loses some of its water content after being heated to a certain temperature.

[0003] Calcined desulfurized gypsum is referred to as calcined gypsum or anhydrous gypsum. It refers to a kind of gypsum in anhydrous state obtained by calcining and dehydrating desulfurized gypsum with high water content at high temperature. Generally, anhydrous gypsum after calcination and grinding is a grayish white powder with fine particle size and large specific surface area. After natural gypsum is crushed, screened and washed, gypsum ore with a certain particle size is obtained. These raw ores are heated to above 10 degrees Celsius to lose some of the crystal water to obtain hemihydrate gypsum. Then the hemihydrate gypsum is calcined at high temperature to remove the remaining water to obtain anhydrous gypsum, that is, calcined gypsum.

[0004] Anhydrous gypsum is generally calcined in a rotary kiln powered by gas or coal powder. The rotary kiln uses a horizontally placed cylindrical kiln body, which is slightly tilted. Air and fuel are introduced into the kiln body, and a large amount of heat is generated through combustion. The gypsum raw materials enter the kiln body from the higher end of the kiln body and move to the lower end as the kiln body rotates. During the movement, they are calcined by high heat, lose moisture, and obtain anhydrous gypsum. However, in a rotary kiln powered by gas or coal powder, the heat is concentrated in the middle of the kiln body, while the gypsum is mainly concentrated in the lower part of the kiln body. The utilization of heat is relatively insufficient, resulting in low heat transfer efficiency and high energy loss in calcination. Summary of the invention

[0005] The purpose of the present invention is to provide a production device for calcining high-temperature anhydrous gypsum to solve the problems raised in the above background technology. A calcining device that can maximize the use of heat is proposed, the efficiency of gypsum dehydration is improved, the component ratio of anhydrous gypsum is increased, and energy consumption is reduced.

[0006] To achieve the above object, the present invention provides the following technical solutions: A production device for calcining high-temperature anhydrous gypsum, comprising a rotary kiln; a kiln head cover and a kiln tail smoke chamber are connected to the two ends of the rotary kiln respectively, a heat exchange structure is arranged inside the rotary kiln, the heat exchange structure comprises a support shaft penetrating the rotary kiln, the position of the support shaft is lower than the axis position of the rotary kiln; a plurality of sleeves are rotatably mounted on the support shaft, a torsion spring is connected between the sleeve and the support shaft, the sleeve is connected to a guide shovel through a connecting rod, the circular track where the outer edge of the guide shovel is located is inscribed with the inner wall of the rotary kiln; a plurality of stir-frying plates corresponding to different axis positions are arranged inside the rotary kiln; the heat exchange structure comprises a recovery tank located at one side of the interior of the rotary kiln, a plurality of discharge pipes are installed on the recovery tank, the discharge pipes are twisted and point to the side of the rotary kiln away from the recovery tank, and the position of the recovery tank is located on the inner side of the circular track where the inner edge of the guide shovel is located; the support shaft and the recovery tank are fixedly connected to the kiln head cover and the kiln tail smoke chamber at both ends of the rotary kiln; A base is arranged outside the rotary kiln, and a driving structure is installed on the base. The driving structure is used to drive the rotary kiln to rotate.

[0007] As a further solution of the present invention: a baffle is slidably installed on the inner edge of the guide shovel, and the end of the baffle close to the rotary kiln opening is connected to a primary extension plate, and the end of the baffle away from the primary extension plate is connected to a secondary extension plate parallel to the primary extension plate, and the length of the secondary extension plate is greater than that of the primary extension plate.

[0008] As a further solution of the present invention: slide grooves are installed on both sides of the guide shovel, both ends of the baffle are inserted into the slide grooves, a primary spring is arranged in the slide groove, and the primary spring is connected to the baffle.

[0009] As a further solution of the present invention: the middle part of the connecting rod is bent toward the rotation direction of the rotary kiln, a plurality of support rods are provided at both ends of the recovery trough, the recovery trough is connected to the kiln head hood and the kiln tail smoke chamber through the support rods, and the discharge pipe is inclined toward the kiln head hood.

[0010] As a further solution of the present invention: a blower and a fuel tank are arranged outside the kiln head hood, the blower and the fuel tank are respectively connected to an air injection pipe, the air injection pipe passes through the kiln head hood and is connected to a combustion device located in the rotary kiln, a kiln head sealing ring connected to the rotary kiln is arranged on the kiln head hood, and a discharge port is arranged on the kiln head hood.

[0011] As a further solution of the present invention: a feed port is arranged on the kiln tail smoke chamber, the kiln tail smoke chamber is connected to the rotary kiln through a kiln tail sealing ring, the feed port is connected to the rotary kiln, and a smoke exhaust pipe is arranged on the kiln tail smoke chamber.

[0012] As a further solution of the present invention: a plurality of belts surrounding the rotary kiln are arranged on the surface of the rotary kiln, a plurality of groups of supporting wheels located on both sides of the rotary kiln are installed on the base, and the supporting wheels are in pressure contact with the belts.

[0013] As a further solution of the present invention: the driving structure includes a gear ring installed on the rotary kiln, a motor is installed on the base, the motor is connected to a transmission, the transmission is connected to a driving gear, and the driving gear is meshed with the gear ring.

[0014] As a further solution of the present invention: a support ring is arranged inside the gear ring, and a plurality of groups of inclined connecting plates are connected inside the support ring, and the connecting plates are connected to the outer wall of the rotary kiln.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The above-mentioned production device for calcining high-temperature anhydrous gypsum is adopted. The device is provided with a frying plate rotating with the rotary kiln inside the rotary kiln, and a support shaft is provided at a lower position in the middle of the rotary kiln. A guide shovel is connected to the support shaft through a torsion spring and a sleeve. The guide shovel is supported at an approximately horizontal angle on one side of the support shaft without being subjected to external force. When the rotary kiln rotates, the frying plate is pressed against the outer edge of the guide shovel, so that the guide shovel scoops the gypsum to the other side downward. After being lifted by the guide shovel, the gypsum is transported to a recovery tank located at a higher position on the other side, and falls back to the other side of the rotary kiln from the discharge pipe. In this process, the gypsum is brought to a high altitude and directly contacts with the high-temperature airflow generated by the combustion of fuel, which can significantly improve the effect of gypsum dehydration, improve the utilization rate of heat, and reduce the energy consumption of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a production device for calcining high-temperature anhydrous gypsum.

[0017] Figure 2 This is a schematic diagram of the axial cross-sectional structure of a production device for calcining high-temperature anhydrous gypsum.

[0018] Figure 3 This is a schematic diagram of the cross-section structure of a rotary kiln in a production device for calcining high-temperature anhydrous gypsum.

[0019] Figure 4 This is a schematic diagram of the structure of the recovery tank and discharge pipe in the production device for calcining high-temperature anhydrous gypsum.

[0020] Figure 5 This is a schematic diagram of the structure of a sleeve and a guide shovel in a production device for calcining high-temperature anhydrous gypsum.

[0021] Figure 6 This is a schematic diagram of the structure of a material guide shovel in a production device for calcining high-temperature anhydrous gypsum.

[0022] In the figure: 1. rotary kiln; 11. frying plate; 12. wheel belt; 2. kiln head cover; 21. fuel tank; 22. jet pipe; 23. blower; 24. discharge port; 25. kiln head sealing ring; 26. combustion device; 3. base; 31. supporting wheel; 4. kiln tail smoke chamber; 41. feed port; 42. exhaust pipe; 43. kiln tail sealing ring; 5. driving structure; 51. driving gear; 52. gear ring; 53. transmission; 54. motor; 55. support ring; 56. connecting plate; 6. heat exchange structure; 61. recovery trough; 611. support rod; 62. discharge pipe; 63. guide shovel; 631. slideway; 64. support shaft; 65. sleeve; 66. connecting rod; 67. baffle; 671. primary extension plate; 672. secondary extension plate; 673. primary spring; 68. torsion spring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figures 1 to 6 In an embodiment of the present invention, a production device for calcining high-temperature anhydrous gypsum includes a rotary kiln 1; the two ends of the rotary kiln 1 are respectively connected to a kiln head cover 2 and a kiln tail smoke chamber 4, and a heat exchange structure 6 is arranged inside the rotary kiln 1, and the heat exchange structure 6 includes a support shaft 64 that passes through the rotary kiln 1, and the position of the support shaft 64 is lower than the axis position of the rotary kiln 1; a plurality of sleeves 65 are rotatably mounted on the support shaft 64, and a torsion spring 68 is connected between the sleeve 65 and the support shaft 64, and the sleeve 65 is connected to a material guide shovel 63 through a connecting rod 66, and the material guide shovel 63 The circular track where the outer edge is located is inscribed with the inner wall of the rotary kiln 1; the rotary kiln 1 is provided with a plurality of stir-frying plates 11 corresponding to different axis positions; the heat exchange structure 6 includes a recovery tank 61 located on one side of the rotary kiln 1, and a plurality of discharge pipes 62 are installed on the recovery tank 61, and the discharge pipes 62 are twisted and point to the side of the rotary kiln 1 away from the recovery tank 61, and the position of the recovery tank 61 is located on the inner side of the circular track where the inner edge of the guide shovel 63 is located; the support shaft 64 and the recovery tank 61 are fixedly connected to the kiln head cover 2 and the kiln tail smoke chamber 4 at both ends of the rotary kiln 1; A base 3 is disposed outside the rotary kiln 1 , and a driving structure 5 is installed on the base 3 . The driving structure 5 is used to drive the rotary kiln 1 to rotate.

[0025] The present device is provided with a heat exchange structure 6 in the rotary kiln 1. The heat exchange structure 6 is supported by the kiln head cover 2 and the kiln tail smoke chamber 4. It is not linked with the rotary kiln 1 itself, so its position does not change during use. A stir-frying plate 11 is provided in the rotary kiln 1, but the width of the stir-frying plate 11 itself is small, and only one stir-frying plate 11 is provided within the same circle, so it does not have too much impact on the internal airflow. The position of the support shaft 64 is slightly lower than the central axis position of the rotary kiln 1, and the guide shovel 63 is connected to the support shaft 64 using a sleeve 65. When the guide shovel 63 falls naturally, the bottom contacts the bottom of the rotary kiln 1, and when the guide tube rotates upward, the distance between the outer edge and the inner wall of the rotary kiln 1 will gradually increase.

[0026] Under the action of the torsion spring 68, the guide shovel 63 is placed horizontally in the rotary kiln 1 on the side away from the recovery tank 61 in a natural state. The rotary kiln 1 rotates to drive the stir-frying plate 11. When the stir-frying plate 11 rotates to the horizontal position, it presses on the edge of the guide shovel 63, pressing the guide shovel 63 downward. The guide shovel 63 passes through the bottom of the rotary kiln 1, scoops up the gypsum at the bottom and lifts it to the other side. As the height of the guide shovel 63 increases, the overlapping area between the stir-frying plate 11 and the guide shovel 63 becomes smaller and smaller. When the guide shovel 63 moves to the recovery tank 61, the gypsum in the guide shovel 63 is poured into the recovery tank 61. The height of the recovery tank 61 in the device is higher than the discharge pipe 62. The gypsum in the recovery tank 61 will be discharged from the discharge pipe 62. During the discharge process, the gypsum moves in the discharge pipe 62. Since the discharge pipe 62 is completely exposed to the high-temperature air, the gypsum therein can obtain a more efficient calcination effect and be dehydrated more thoroughly. By making the trajectory of the material guide pipe tilt toward the discharging direction of the rotary kiln 1, the gypsum can be transferred toward the discharging direction. The discharging pipe 62 is used to replace the transfer effect of the tilt of the rotary kiln 1 itself, and the tilt angle of the rotary kiln 1 is reduced. This can reduce the pressure of the rotary kiln 1 on the supporting wheel 31 and other external supporting parts, thereby extending the service life of the equipment.

[0027] When the guide shovel 63 is raised to the recovery tank 61, the stir-frying plate 11 is separated from the recovery tank 61, and the recovery tank 61 loses support and automatically rotates downward to the other side to reset. After the rotary kiln 1 rotates one circle, the shoveling and transfer work can be performed again. The device is simple and convenient to use. Since there is only one guide shovel 63 and one stir-frying plate 11 in a unit distance, and the cross-sectional dimensions of the guide shovel 63, stir-frying plate 11 and recovery tank 61 are very small, it basically does not affect the flow of hot air. At the same time, it can improve the calcination effect by pushing the gypsum through the discharge pipe 62, and can better utilize the heat and reduce energy consumption.

[0028] As another embodiment of the present invention, please refer to Figure 5 and Figure 6A baffle 67 is slidably mounted on the inner edge of the guide shovel 63, and a primary extension plate 671 is connected to one end of the baffle 67 close to the opening of the rotary kiln 1, and a secondary extension plate 672 parallel to the primary extension plate 671 is connected to one end of the baffle 67 away from the primary extension plate 671, and the length of the secondary extension plate 672 is greater than that of the primary extension plate 671. The baffle 67 is located at the inner edge of the guide shovel 63. When the guide shovel 63 scoops up the gypsum and is lifted to a position above the support shaft 64, the baffle 67 can prevent the gypsum from sliding down from the inside. The inner edge of the primary extension plate 671 is located at the outside of the recovery groove 61, and the inner edge of the secondary extension plate 672 overlaps with the range of the recovery groove 61 to a certain extent. As the guide shovel 63 continues to rise, the secondary extension plate 672 is blocked, and the baffle 67 cannot continue to rise, while the guide plate continues to rise, and the gypsum in the guide shovel 63 slides down along the primary extension plate 671 into the recovery groove 61, allowing the gypsum to be discharged smoothly.

[0029] The reason why the present device chooses to use a movable and repositionable material guide shovel 63 instead of choosing to raise the frying plate 11 directly fixed on the inner wall of the rotary kiln 1 is to avoid interference with the internal airflow caused by the raised frying plate 11. If the height of the frying plate 11 is too high, the airflow cannot flow smoothly in the frying plate 11 area, which will weaken the heat exchange efficiency between the gypsum and the high-temperature airflow, thereby affecting the production efficiency. If the frying plate 11 is used to raise the gypsum to a position beyond the central axis, it is necessary to set the frying plate 11 to an inclined structure or set a complex structure on the outer edge of the frying plate 11, which further leads to airflow obstruction. Therefore, the use of a movable material guide shovel 63 can alleviate the obstruction of the airflow and avoid interference with normal airflow heat exchange.

[0030] See also Figure 5 and Figure 6 The guide shovel 63 is provided with a slide groove 631 on both sides, and the two ends of the baffle 67 are inserted into the slide groove 631. A primary spring 673 is provided in the slide groove 631, and the primary spring 673 is connected to the baffle 67. The slide groove 631 is used to limit the position of the baffle 67, and the primary spring 673 supports the baffle 67. When the baffle 67 does not contact the recovery tank 61, the baffle 67 is naturally raised to prevent the gypsum from falling.

[0031] See also Figure 1 , Figure 4 and Figure 5The middle part of the connecting rod 66 is bent toward the rotation direction of the rotary kiln 1. A plurality of support rods 611 are provided at both ends of the recovery tank 61. The recovery tank 61 is connected to the kiln head cover 2 and the kiln tail smoke chamber 4 through the support rods 611. The discharge pipe 62 is inclined toward the kiln head cover 2. There is a bending space in the middle part of the connecting rod 66. Therefore, when the height of the guide shovel 63 is higher than the recovery tank 61, part of the connecting rod 66 is still located below the recovery tank 61, so that the guide shovel 63 has a larger range of movement. The support rod 611 is used to provide support and fixing effect for the recovery tank 61. The discharge pipe 62 is inclined toward the discharge direction, which not only enhances the calcination effect of gypsum, but also assists in realizing the continuous discharge of gypsum.

[0032] See also Figure 1 The kiln head cover 2 is provided with a blower 23 and a fuel tank 21 outside. The blower 23 and the fuel tank 21 are connected to an air jet pipe 22 respectively. The air jet pipe 22 passes through the kiln head cover 2 and is connected to a combustion device 26 located in the rotary kiln 1. The kiln head cover 2 is provided with a kiln head sealing ring 25 connected to the rotary kiln 1. The kiln head cover 2 is provided with a discharge port 24. The blower 23 fills the interior with air for oxygen supply. The fuel tank 21 mixes coal powder or fuel gas into the gas as fuel. The fuel and air are mixed and enter the rotary kiln 1. The combustion device 26 is used to ignite and generate a large amount of high-temperature gas. The high-temperature gas uses its own temperature to burn the gypsum during the process of passing through the rotary kiln 1. The shaking seal ring is used to dynamically seal the rotary kiln 1. The gypsum in the rotary kiln 1 gradually reaches the kiln head cover 2 position as it is calcined and falls into the discharge port 24. It can be recovered manually or by automatic equipment such as a conveyor belt.

[0033] See also Figure 1 The kiln tail smoke chamber 4 is provided with a feed port 41, the kiln tail smoke chamber 4 is connected to the rotary kiln 1 through a kiln tail sealing ring 43, the feed port 41 is connected to the rotary kiln 1, and a smoke exhaust pipe 42 is provided on the kiln tail smoke chamber 4. Gypsum powder enters the rotary kiln 1 from the feed port 41, the kiln tail sealing ring 43 is used to dynamically seal the rotary kiln 1, and the smoke exhaust pipe 42 is used to exhaust smoke, which can be connected to a cyclone dust collector and a bag dust collector, etc., and discharged after filtering.

[0034] See also Figure 1 The surface of the rotary kiln 1 is provided with a plurality of belts 12 surrounding the rotary kiln 1, and the base 3 is provided with a plurality of supporting wheels 31 located on both sides of the rotary kiln 1, and the supporting wheels 31 are in pressure contact with the belts 12. The supporting wheels 31 provide support for the belts 12 from below to maintain the stability of the rotary kiln 1.

[0035] See also Figures 1 to 3The driving structure 5 includes a gear ring 52 installed on the rotary kiln 1, and a motor 54 is installed on the base 3. The motor 54 is connected to a transmission 53, and the transmission 53 is connected to a driving gear 51. The driving gear 51 is meshed with the gear ring 52. The motor 54 drives the driving gear 51 through the transmission 53, and the driving gear 51 drives the gear ring 52 to rotate, thereby driving the rotary kiln 1 to rotate. The driving structure 5 provided in the present device is only used as a demonstration of an available structure and should not be regarded as a restrictive description. In addition to using the driving gear 51 to cooperate with the gear ring 52, a belt can also be used to cooperate with a pulley or other forms to achieve the driving of the rotary kiln 1.

[0036] See also Figures 1 to 3 A support ring 55 is provided inside the gear ring 52, and multiple groups of inclined connecting plates 56 are connected inside the support ring 55, and the connecting plates 56 are connected to the outer wall of the rotary kiln 1. The support ring 55 provides support for the gear ring 52, and the internal connecting plates 56 have a certain elasticity to bridge the defects caused by the coaxiality error of the large rotary kiln 1 equipment.

[0037] The working principle of the present invention is: The present device is provided with a heat exchange structure 6 in the rotary kiln 1, and the heat exchange structure 6 is supported by a support shaft 64. A shaft sleeve is connected to the support shaft 64 through a torsion spring 68, and the shaft sleeve is connected to a guide shovel 63 through a connecting rod 66. The baffle 67 inside the guide shovel 63 is movable. The height of the support shaft 64 is lower than the height of the axis of the rotary kiln 1. A frying plate 11 is provided on the inner wall of the rotary kiln 1. The frying plate 11 rotates with the rotary kiln 1 and can press down the guide shovel 63 in a horizontal position, scoop up a certain amount of gypsum and transfer it to the other side. An open recovery trough 61 is provided at a high position on the other side of the rotary kiln 1. The recovery trough 61 is connected to a curved discharge pipe 62. The shoveled gypsum is poured into the recovery trough 61, moves downward along the discharge pipe 62 and is discharged. During the movement, the gypsum in the air can have sufficient contact and heat exchange with the external high-temperature gas, which significantly improves the calcination effect.

[0038] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A production device for calcining high-temperature anhydrous gypsum, characterized in that: It comprises a rotary kiln; a kiln head cover and a kiln tail smoke chamber are connected to the two ends of the rotary kiln respectively, a heat exchange structure is arranged inside the rotary kiln, the heat exchange structure comprises a support shaft penetrating the rotary kiln, the position of the support shaft is lower than the axis position of the rotary kiln; a plurality of sleeves are rotatably mounted on the support shaft, a torsion spring is connected between the sleeve and the support shaft, the sleeve is connected to a guide shovel through a connecting rod, the circular track where the outer edge of the guide shovel is located is inscribed with the inner wall of the rotary kiln; a plurality of stir-frying plates corresponding to different axis positions are arranged inside the rotary kiln; the heat exchange structure comprises a recovery tank located on one side of the interior of the rotary kiln, a plurality of discharge pipes are installed on the recovery tank, the discharge pipes are twisted and point to the side of the rotary kiln away from the recovery tank, and the position of the recovery tank is located on the inner side of the circular track where the inner edge of the guide shovel is located; the support shaft and the recovery tank are fixedly connected to the kiln head cover and the kiln tail smoke chamber at both ends of the rotary kiln; A base is arranged outside the rotary kiln, and a driving structure is installed on the base. The driving structure is used to drive the rotary kiln to rotate.

2. The production device for calcining high-temperature anhydrous gypsum according to claim 1, characterized in that: A baffle is slidably mounted on the inner edge of the guide shovel, one end of the baffle close to the rotary kiln opening is connected to a primary extension plate, and one end of the baffle away from the primary extension plate is connected to a secondary extension plate parallel to the primary extension plate, and the length of the secondary extension plate is greater than that of the primary extension plate.

3. The production device for calcining high-temperature anhydrous gypsum according to claim 2, characterized in that: Slide grooves are installed on both sides of the guide shovel, and the two ends of the baffle are inserted into the slide grooves. A primary spring is arranged in the slide groove, and the primary spring is connected to the baffle.

4. The production device for calcining high-temperature anhydrous gypsum according to claim 1, characterized in that: The middle part of the connecting rod is bent toward the rotation direction of the rotary kiln, a plurality of support rods are arranged at both ends of the recovery tank, the recovery tank is connected to the kiln head cover and the kiln tail smoke chamber through the support rods, and the discharge pipe is inclined toward the kiln head cover.

5. The production device for calcining high-temperature anhydrous gypsum according to claim 1, characterized in that: A blower and a fuel tank are arranged outside the kiln head cover, and the blower and the fuel tank are respectively connected to an air jet pipe, and the air jet pipe passes through the kiln head cover and is connected to a combustion device located in the rotary kiln. A kiln head sealing ring connected to the rotary kiln is arranged on the kiln head cover, and a discharge port is arranged on the kiln head cover.

6. The production device for calcining high-temperature anhydrous gypsum according to claim 1, characterized in that: The kiln tail smoke chamber is provided with a feed inlet, the kiln tail smoke chamber is connected to the rotary kiln through a kiln tail sealing ring, the feed inlet is connected to the rotary kiln, and the kiln tail smoke chamber is provided with a smoke exhaust pipe.

7. The production device for calcining high-temperature anhydrous gypsum according to claim 1, characterized in that: The surface of the rotary kiln is provided with a plurality of belts surrounding the rotary kiln, and the base is provided with a plurality of groups of supporting wheels located at both sides of the rotary kiln, and the supporting wheels are in pressure contact with the belts.

8. The production device for calcining high-temperature anhydrous gypsum according to claim 1, characterized in that: The driving structure comprises a gear ring installed on the rotary kiln, a motor is installed on the base, the motor is connected to a transmission, the transmission is connected to a driving gear, and the driving gear is meshed and connected with the gear ring.

9. The production device for calcining high-temperature anhydrous gypsum according to claim 8, characterized in that: A support ring is arranged inside the gear ring, and a plurality of groups of inclined connecting plates are connected inside the support ring, and the connecting plates are connected to the outer wall of the rotary kiln.

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