Drying device and method for preparing alpha gypsum from titanium gypsum

Abstract

The invention relates to the technical field of gypsum drying, and particularly discloses a drying device and method for preparing alpha gypsum from titanium gypsum. The drying device comprises a base and a digital display control panel; an upper feeding shell assembly, a rotary drying shell assembly, a lower discharging shell assembly and a receiving assembly are sequentially arranged between the two vertical rods from top to bottom. The rotary drying shell assembly comprises a drying shell, a dressing drying roller is rotationally arranged in the drying shell, a first rotary driving motor used for driving the dressing drying roller to rotate is arranged on the drying shell, and the dressing drying roller is driven by the first rotary driving motor to rotate while the rotary drying shell assembly is used for drying gypsum. The upper feeding shell assembly and the lower discharging shell assembly are connected together through rotation of the dressing drying roller, a sealed cavity can be formed in the drying shell in the feeding process of the upper feeding shell assembly and the discharging process of the lower discharging shell assembly, and therefore under the condition that gypsum is continuously dried, heat dissipation prevention protection is achieved, and energy is saved.

Description

Technical Field

[0001] The invention relates to the technical field of gypsum drying, and in particular to a drying device and method for preparing alpha gypsum by using titanium gypsum. Background Art

[0002] The crystal structure of α-hemihydrate gypsum is stable and has a regular short columnar shape, which makes it show higher strength and hardness in the macroscopic sense. Compared with other types of gypsum, it usually has higher density and more suitable porosity. The drying process can remove the moisture in α-gypsum, making its crystal structure more compact. In this way, the strength and hardness of gypsum products can be improved in subsequent use, making them better able to withstand external forces.

[0003] The disclosure discloses an α-type semi-hydrated gypsum horizontal autoclave with publication number CN213977455U, comprising a kettle body, wherein the kettle body comprises an outer kettle body and an inner kettle body, wherein the outer kettle body is sleeved on the outer surface of the inner kettle body; a feed port end cover and a discharge port end cover are respectively arranged at two ends of the kettle body; a heat transfer oil pipe is arranged on the outer surface of the inner kettle body, and the heat transfer oil pipe is evenly arranged on the outer surface of the inner kettle body.

[0004] The disclosure discloses an α-type semi-hydrated gypsum autoclave with publication number CN201545787U, comprising a horizontal autoclave body, a feed end cover and a discharge end cover being provided on the autoclave body, a hot oil heating device being installed on the inner cavity wall of the autoclave body, the hot oil heating device being connected to the outside of the autoclave body through a heat-conducting oil pipe, and a steam inlet, a steam outlet and a water outlet being provided on the autoclave body; the α-type semi-hydrated gypsum autoclave.

[0005] However, currently, most gypsum drying devices use horizontal autoclaves for drying. After drying, opening the autoclave cover to take out the gypsum will result in a large amount of heat loss. Summary of the invention

[0006] The purpose of the present invention is to provide a drying device and method for preparing alpha gypsum using titanium gypsum in order to solve the above problems, in order to overcome the defects of the prior art, as described in detail below.

[0007] To achieve the above object, the present invention provides the following technical solutions: The present invention provides a drying device for preparing alpha gypsum using titanium gypsum, comprising a base and a digital display control panel, wherein two parallel vertical rods are arranged on the base, and an upper feeding shell assembly, a rotating drying shell assembly, a lower discharging shell assembly and a material receiving assembly are arranged in sequence from top to bottom between the two vertical rods; The rotary drying shell assembly includes a drying shell, a drying dressing roller is rotatably arranged in the drying shell, a first rotary drive motor for driving the drying dressing roller to rotate is arranged on the drying shell, a heating pipe assembly for providing hot air therein is arranged on the drying shell, a scraping assembly for scraping off the gypsum material on the outer side of the drying dressing roller is arranged on the drying shell, and the output end of the digital display control panel is electrically connected to the input end of the first rotary drive motor.

[0008] Preferably, the outer side of the drying dressing roller is provided with a plurality of evenly distributed annular grooves along its axial direction, the cross-sectional shape of the annular grooves is V-shaped, the drying dressing roller is made of heat-conductive material, and a plurality of electric heaters evenly distributed along its circumferential direction are arranged inside the drying dressing roller, and the output end of the digital display control panel is electrically connected to the input end of the electric heater.

[0009] Preferably, the scraper assembly includes a scraper rod arranged below the drying dressing roller, the scraper rod is provided with a scraper that fits the bottom side contour of the drying dressing roller, and both ends of the scraper rod are provided with electric telescopic rods for driving the scraper rod to move horizontally, and the output end of the digital display control panel is electrically connected to the input end of the electric telescopic rod.

[0010] Preferably, the heating duct assembly comprises main ventilation ducts distributed on both sides of the drying shell, the main ventilation ducts being fixed on the outer side wall of the drying shell by means of clamps, a number of jet branch pipes being evenly distributed are arranged on the main ventilation duct along its length direction, the air outlet ends of the jet branch pipes extend to the interior of the drying shell, a connecting duct is connected to the same ends of the two main ventilation ducts, and a hot air inlet pipe joint is arranged on the connecting duct.

[0011] Preferably, the outer contour shape of the drying shell is a central shell shape which is wide in the middle and narrow at the upper and lower ends. Installation cavities are formed inside the upper and lower sides of the drying shell. A second pressure relief valve and a temperature sensor are respectively provided on both sides of the upper part of the drying shell. The second pressure relief valve and the temperature sensor are both installed in the installation cavity above. The output end of the digital display control panel is electrically connected to the input end of the second pressure relief valve, and the output end of the temperature sensor is electrically connected to the input end of the digital display control panel.

[0012] Preferably, the upper feeding shell assembly includes a feeding shell, the lower side of the feeding shell and the upper side of the drying shell are sealed and connected to each other, and a dressing hopper is provided on the lower side of the feeding shell. The dressing hopper has an outer shape of a funnel that is wide at the top and narrow at the bottom, and a dressing notch for cooperating with an annular groove is provided on the bottom side of the dressing hopper along the axial direction of the drying dressing roller.

[0013] Preferably, the top side of the feeding shell is respectively connected to a pressure regulating pipe, a pressure relief pipe and a gypsum feeding pipe, the pressure relief pipe is provided with an air pressure sensor, the gypsum feeding pipe is provided with a solenoid valve, and the output end of the digital display control panel is respectively electrically connected to the input end of the solenoid valve and the air pressure sensor.

[0014] Preferably, the lower discharging shell assembly includes a discharging shell having a rectangular cross-sectional shape, a rotating chamber formed in the discharging shell, a rotating shaft rotatably arranged in the rotating chamber, and three or more discharging paddles evenly distributed around the rotating shaft are arranged on the outer side of the rotating shaft, and a second rotating drive motor for driving the rotating shaft to rotate is fixedly arranged on the discharging shell. When the second rotating drive motor drives the discharging paddles to rotate in the rotating chamber, at least two discharging paddles are sealed and abutted against the inner wall of the rotating chamber, and the output end of the digital display control panel is electrically connected to the input end of the second rotating drive motor.

[0015] Preferably, the material receiving assembly includes a material receiving box, and hydraulic cylinders are symmetrically distributed with the material receiving box on both sides. The hydraulic cylinders are fixedly arranged on a base, and push rods are fixedly arranged on the push rod heads of the hydraulic cylinders facing upward. Side plates are fixedly arranged on both sides of the top of the material receiving box, and positioning grooves for positioning and cooperating with the push rods are opened on the lower sides of the side plates. A pressure edge cover for cooperating with the upper opening of the material receiving box is fixedly arranged on the outer side of the bottom end of the discharge shell, and the output end of the digital display control panel is electrically connected to the input end of the hydraulic cylinder.

[0016] A drying method for preparing alpha gypsum using titanium gypsum comprises the following steps: S1: Open the solenoid valve, add the gypsum from the gypsum feeding pipe into the feeding shell for storage. When the gypsum is dried, close the solenoid valve, and connect the pressure regulating pipe with the external air pressure regulating device to achieve positive and negative pressure in the feeding shell. When the pressure is positive, the dressing hopper can apply the material to the outside of the drying dressing roller. When the pressure is negative, the dressing hopper stops discharging the material to the drying dressing roller. S2: When the dressing hopper discharges material toward the outside of the drying dressing roller, the first rotary drive motor drives the drying dressing roller to rotate. During the rotation of the drying dressing roller, the dressing hopper is used to spread and flatten the gypsum on the outside of the drying dressing roller. At this time, the heating pipe assembly transports hot air into the drying dressing roller to heat and dry the gypsum. S3: In step S2, the electric heater provided in the drying and dressing roller can heat it, thereby achieving double-sided heating and drying of the gypsum from the inside to the outside, wherein the annular groove can achieve the circulation of hot air and increase the laying area of ​​the gypsum on the outside of the drying and dressing roller; S4: During the rotation of the drying dressing roller, when the drying dressing roller is loaded at the dressing hopper and rotates to the scraper assembly, the gypsum is dried, and the scraper scrapes off the gypsum on the outer surface of the drying dressing roller and drops it into the discharge shell. The gypsum accumulates in the discharge shell and is rotated by the discharge blade to push the gypsum downward and fall into the receiving box.

[0017] The beneficial effects are: 1. While the gypsum is being dried by rotating the drying shell assembly, the rotation of the drying and dressing roller connects the upper feeding shell assembly and the lower discharging shell assembly together. The feeding process of the upper feeding shell assembly and the discharging process of the lower discharging shell assembly will form a sealed chamber in the drying shell, thereby realizing the anti-emission protection of hot air and saving energy while the gypsum is being dried continuously; 2. The annular groove can realize the circulation of hot air on the outside of the drying and dressing roller and the inside of the drying shell, and increase the laying area of ​​gypsum on the outside of the drying and dressing roller; 3. A channel for circulating hot air is formed between the outer side of the drying dressing roller and the inner side of the drying shell, so that when the gypsum is attached to the outer side of the drying dressing roller, the outer surface of the gypsum can be heated and dried, and the electric heater can heat the drying dressing roller, thereby heating and drying the contact surface between the gypsum and the drying dressing roller. In the case of internal and external heating, the drying efficiency and uniformity of the gypsum can be greatly improved; 4. The scraper can scrape the outer surface of the drying dressing roller during its rotation, thereby scraping off the plaster on the outer surface of the drying dressing roller; 5. The dressing gap on the lower side of the dressing hopper can fit with the annular groove on the outer side of the drying dressing roller, so that when the plaster is spread on the outer side of the drying dressing roller, the thickness of the plaster can be uniform and consistent; 6. When the second rotary drive motor drives the discharge blades to rotate, at least two discharge blades can be sealed against the inner wall of the rotating chamber, thereby sealing the discharge shell and preventing hot air from leaking out of the discharge shell. As the height of gypsum accumulated in the discharge shell becomes higher and higher, the sealing effect of the discharge shell becomes better and better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1It is a front view of the present invention; Figure 2 The present invention Figure 1 Left view of; Figure 3 The present invention Figure 1 A first-direction stereogram; Figure 4 The present invention Figure 1 AA section view; Figure 5 The present invention Figure 2 BB cross-section diagram; Figure 6 The present invention Figure 5 A partial enlarged view of point C; Figure 7 The present invention Figure 1 A second direction stereogram of .

[0020] The reference numerals are as follows: 1. base; 101. upright pole; 2. rotary drying shell assembly; 201. drying shell; 202. drying dressing roller; 203. electric heater; 204. annular groove; 205. first rotary drive motor; 3. upper feeding shell assembly; 301. feeding shell; 302. pressure regulating pipe; 303. pressure relief pipe; 304. gypsum feeding pipe; 305. solenoid valve; 306. air pressure sensor; 307. dressing hopper; 308. dressing notch; 4. lower discharge shell assembly; 401. discharge shell; 40 2. Edge pressing cover; 403. Rotating chamber; 404. Discharging blade; 405. Second rotating drive motor; 5. Heating pipe assembly; 501. Main ventilation pipe; 502. Second pressure relief valve; 503. Temperature sensor; 504. Jet branch pipe; 505. Connecting pipe; 506. Hot air inlet pipe joint; 6. Material receiving assembly; 601. Material receiving box; 602. Side plate; 603. Hydraulic cylinder; 604. Push rod; 7. Digital display control panel; 8. Scraping assembly; 801. Scraping rod; 802. Scraper; 803. Electric telescopic rod. DETAILED DESCRIPTION

[0021] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0022] See also Figure 1-Figure 7As shown, the present invention provides a drying device for preparing α gypsum by using titanium gypsum, comprising a base 1 and a digital display control panel 7, wherein two parallel vertical rods 101 are arranged on the base 1, and an upper feeding shell assembly 3, a rotating drying shell assembly 2, a lower discharging shell assembly 4 and a material receiving assembly 6 are arranged in sequence from top to bottom between the two vertical rods 101; the rotating drying shell assembly 2 comprises a drying shell 201, a drying dressing roller 202 is rotatably arranged in the drying shell 201, a first rotating drive motor 205 for driving the drying dressing roller 202 to rotate is arranged on the drying shell 201, a heating pipe assembly 5 for providing hot air therein is arranged on the drying shell 201, a scraping assembly 8 for scraping off the gypsum material on the outer side of the drying dressing roller 202 is arranged on the drying shell 201, and the output end of the digital display control panel 7 is electrically connected to the input end of the first rotating drive motor 205.

[0023] See the instruction manual Figure 4 , Figure 5 and Figure 6 As shown, the outer side of the drying dressing roller 202 is provided with a plurality of evenly distributed annular grooves 204 along its axial direction, and the cross-sectional shape of the annular grooves 204 is V-shaped. The drying dressing roller 202 is made of heat-conducting material, and a plurality of evenly distributed electric heaters 203 are arranged inside the drying dressing roller 202 along its circumferential direction, and the output end of the digital display control panel 7 is electrically connected to the input end of the electric heater 203. In practical applications, a channel for circulating hot air is formed between the outer side of the drying dressing roller 202 and the inner side of the drying shell 201, so that when the gypsum is attached to the outer side of the drying dressing roller 202, the outer surface of the gypsum can be heated and dried, and the electric heater 203 can heat the drying dressing roller 202, thereby heating and drying the bonding surface between the gypsum and the drying dressing roller 202. In the case of internal and external heating, the drying efficiency and uniformity of the gypsum can be greatly improved.

[0024] See the instruction manual Figure 4 , Figure 5 and Figure 7 As shown, the scraper assembly 8 includes a scraper rod 801 disposed below the dry dressing roller 202, a scraper 802 is disposed on the scraper rod 801 and fits the bottom profile of the dry dressing roller 202, and electric telescopic rods 803 are disposed at both ends of the scraper rod 801 for driving the scraper rod 801 to move horizontally, and the output end of the digital display control panel 7 is electrically connected to the input end of the electric telescopic rod 803. In actual application, the scraper 802 can scrape the outer surface of the dry dressing roller 202 during the rotation of the dry dressing roller 202, thereby scraping off the gypsum on the outer surface of the dry dressing roller 202.

[0025] See the instruction manual Figure 1 , Figure 4 and Figure 7 As shown, the heating duct assembly 5 includes main ventilation ducts 501 distributed on both sides of the drying shell 201, the main ventilation ducts 501 are fixed on the outer wall of the drying shell 201 by clamps, and the main ventilation ducts 501 are provided with a plurality of uniformly distributed jet branch pipes 504 along the length direction thereof, and the air outlet ends of the jet branch pipes 504 extend to the interior of the drying shell 201, and a connecting duct 505 is connected to each other at the same ends of the two main ventilation ducts 501, and a hot air introduction pipe joint 506 is provided on the connecting duct 505. The outer contour shape of the drying shell 201 is a central shell shape that is wide in the middle and narrow at the upper and lower ends. Installation cavities are formed inside the upper and lower sides of the drying shell 201. The second pressure relief valve 502 and the temperature sensor 503 are respectively arranged on both sides of the upper part of the drying shell 201. The second pressure relief valve 502 and the temperature sensor 503 are both installed in the upper installation cavity. The output end of the digital display control panel 7 is electrically connected to the input end of the second pressure relief valve 502, and the output end of the temperature sensor 503 is electrically connected to the input end of the digital display control panel 7.

[0026] The upper feeding shell assembly 3 includes a feeding shell 301, the lower side of the feeding shell 301 and the upper side of the drying shell 201 are sealed and connected to each other, and a dressing hopper 307 is arranged on the lower side of the feeding shell 301. The appearance of the dressing hopper 307 is a funnel shape that is wide at the top and narrow at the bottom. A dressing notch 308 for matching with the annular groove 204 is opened along the axial direction of the drying dressing roller 202 at the bottom side of the dressing hopper 307. The top side of the feeding shell 301 is respectively connected with a pressure regulating pipeline 302, a pressure relief pipeline 303 and a gypsum feeding pipeline 304, an air pressure sensor 306 is arranged on the pressure relief pipeline 303, and an electromagnetic valve 305 is arranged on the gypsum feeding pipeline 304. The output end of the digital display control panel 7 is electrically connected to the input end of the electromagnetic valve 305 and the air pressure sensor 306. Through the above-mentioned specific structural design, the dressing gap 308 provided on the lower side of the dressing hopper 307 can fit with the annular groove 204 provided on the outer side of the drying dressing roller 202, so that when the plaster is spread on the outer side of the drying dressing roller 202, the thickness of the plaster can be uniform and consistent.

[0027] The lower discharge shell assembly 4 includes a discharge shell 401, the cross-sectional shape of the discharge shell 401 is rectangular, a rotating chamber 403 is formed in the discharge shell 401, a rotating shaft is rotatably arranged in the rotating chamber 403, and three or more discharge paddles 404 are evenly distributed around the rotating shaft on the outer side thereof, and a second rotary drive motor 405 for driving the rotating shaft to rotate is fixedly arranged on the discharge shell 401. When the second rotary drive motor 405 drives the discharge paddles 404 to rotate in the rotating chamber 403, at least two discharge paddles 404 are sealed and abutted against the inner wall of the rotating chamber 403, and the output end of the digital display control panel 7 is electrically connected to the input end of the second rotary drive motor 405. Through the above-mentioned specific structural design, when the second rotary drive motor 405 drives the discharge paddle 404 to rotate, at least two discharge paddles 404 can be sealed and abutted against the inner wall of the rotating chamber 403, thereby achieving the sealing of the discharge shell 401 and preventing hot air from leaking out of the discharge shell 401. As the height of gypsum accumulated in the discharge shell 401 becomes higher and higher, the sealing effect of the discharge shell 401 becomes better and better.

[0028] The material receiving assembly 6 includes a material receiving box 601, and hydraulic cylinders 603 are symmetrically distributed with the material receiving box 601 as the center on both sides. The hydraulic cylinder 603 is fixedly set on the base 1, and a push rod 604 is fixedly set on the push rod head end of the hydraulic cylinder 603 facing upward. Side plates 602 are fixedly set on both sides of the top of the material receiving box 601, and a positioning groove for positioning and cooperating with the push rod 604 is opened on the lower side of the side plate 602. A pressure edge cover 402 for cooperating with the upper opening of the material receiving box 601 is fixedly set on the outer side of the bottom end of the discharge shell 401, and the output end of the digital display control panel 7 is electrically connected to the input end of the hydraulic cylinder 603. When the push rod of the hydraulic cylinder 603 is extended, the push rod 604 is embedded in the positioning slot. When the push rod of the hydraulic cylinder 603 continues to extend, it pushes the material receiving box 601 to move upward, thereby realizing the docking and sealing between the edge pressing cover 402 and the upper opening of the material receiving box 601, which can prevent the powdered material from escaping outward after the gypsum is dried. When unloading, the push rod of the hydraulic cylinder 603 retracts, thereby driving the material receiving box 601 to move downward, so that the material receiving box 601 and the discharge shell 401 are separated from each other, and the push rod 604 is separated from the positioning slot. After the material receiving box 601 falls on the base 1, the material receiving box 601 can be moved for unloading.

[0029] Working principle and technical effects of the present invention: When the gypsum is dried, the solenoid valve 305 is opened, and the gypsum is added from the gypsum feeding pipe 304 to the feeding shell 301 for storage. In this process, the added gypsum is α gypsum with viscosity after a certain amount of water is added. When the gypsum is dried, the solenoid valve 305 is closed, and the pressure regulating pipe 302 is connected to the external air pressure regulating device to achieve positive and negative pressure in the feeding shell 301. When the pressure is positive, the dressing hopper 307 can apply the material to the outside of the drying dressing roller 202. When the pressure is negative, the dressing hopper 307 stops discharging the material to the drying dressing roller 202. When the dressing hopper 307 discharges the material toward the outside of the drying dressing roller 202, the first rotary drive motor 205 drives the drying dressing roller 202 to rotate. During the rotation of the drying dressing roller 202, the dressing hopper 307 is used to achieve the gypsum on the drying dressing roller 202. 02 is unfolded and flattened, at which time, the heating pipe assembly 5 transports hot air into the drying dressing roller 202 to heat and dry the gypsum; the electric heater 203 provided in the drying dressing roller 202 can heat it, thereby realizing double-sided heating and drying of the gypsum from the inside to the outside, wherein the annular groove 204 can realize the circulation of hot air and increase the laying area of ​​the gypsum on the outside of the drying dressing roller 202; during the rotation of the drying dressing roller 202, when the drying dressing roller 202 is loaded at the dressing hopper 307 and rotates to the scraper assembly 8, the gypsum is dried, and the scraper 802 scrapes off the gypsum on the outer surface of the drying dressing roller 202 and drops it into the discharge shell 401, where the gypsum accumulates and is rotated by the discharge blade 404 to push the gypsum downward and fall into the receiving box 601.

[0030] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A drying device for preparing alpha gypsum using titanium gypsum, characterized in that: The invention comprises a base (1) and a digital display control panel (7), wherein two parallel vertical rods (101) are arranged on the base (1), and an upper feeding shell assembly (3), a rotary drying shell assembly (2), a lower discharging shell assembly (4) and a material receiving assembly (6) are arranged in sequence from top to bottom between the two vertical rods (101); The rotary drying shell assembly (2) comprises a drying shell (201), a drying dressing roller (202) being rotatably arranged inside the drying shell (201), a first rotary drive motor (205) being arranged on the drying shell (201) for driving the drying dressing roller (202) to rotate, a heating pipe assembly (5) being arranged on the drying shell (201) for providing hot air therein, a scraping assembly (8) being arranged on the drying shell (201) for scraping off gypsum material on the outside of the drying dressing roller (202), and an output end of the digital display control panel (7) being electrically connected to an input end of the first rotary drive motor (205).

2. A drying device for preparing alpha gypsum using titanium gypsum according to claim 1, characterized in that: The outer side of the drying and dressing roller (202) is provided with a plurality of evenly distributed annular grooves (204) along its axial direction, the cross-section of the annular groove (204) is V-shaped, the drying and dressing roller (202) is made of a heat-conducting material, a plurality of evenly distributed electric heaters (203) along its circumferential direction are arranged inside the drying and dressing roller (202), and the output end of the digital display control panel (7) is electrically connected to the input end of the electric heater (203).

3. A drying device for preparing alpha gypsum using titanium gypsum according to claim 2, characterized in that: The scraper assembly (8) comprises a scraper rod (801) arranged below the drying and dressing roller (202); the scraper rod (801) is provided with a scraper (802) that fits the bottom profile of the drying and dressing roller (202); both ends of the scraper rod (801) are provided with electric telescopic rods (803) for driving the scraper rod (801) to move horizontally; and the output end of the digital display control panel (7) is electrically connected to the input end of the electric telescopic rod (803).

4. A drying device for preparing alpha gypsum using titanium gypsum according to claim 1, characterized in that: The heating pipe assembly (5) comprises main ventilation pipes (501) distributed on both sides of the drying shell (201); the main ventilation pipes (501) are fixedly arranged on the outer wall of the drying shell (201) by means of a clamp; a plurality of jet branch pipes (504) are evenly distributed along the length direction of the main ventilation pipe (501); the air outlet ends of the jet branch pipes (504) extend into the interior of the drying shell (201); a connecting pipe (505) is connected to the same ends of the two main ventilation pipes (501); and a hot air introduction pipe joint (506) is arranged on the connecting pipe (505).

5. A drying device for preparing alpha gypsum using titanium gypsum according to claim 4, characterized in that: The outer contour of the drying shell (201) is in the shape of a central shell that is wide in the middle and narrow at the upper and lower ends. An installation cavity is formed inside the upper and lower sides of the drying shell (201). A second pressure relief valve (502) and a temperature sensor (503) are respectively arranged on both sides of the upper part of the drying shell (201). The second pressure relief valve (502) and the temperature sensor (503) are both installed in the installation cavity at the top. The output end of the digital display control panel (7) is electrically connected to the input end of the second pressure relief valve (502), and the output end of the temperature sensor (503) is electrically connected to the input end of the digital display control panel (7).

6. A drying device for preparing alpha gypsum using titanium gypsum according to claim 1, characterized in that: The upper feeding shell assembly (3) comprises a feeding shell (301), the lower side of the feeding shell (301) and the upper side of the drying shell (201) being sealed and butt-jointed with each other, a dressing hopper (307) being arranged on the lower side of the feeding shell (301), the dressing hopper (307) being in the shape of a funnel that is wide at the top and narrow at the bottom, and a dressing notch (308) for cooperating with the annular groove (204) being provided on the bottom side of the dressing hopper (307) along the axial direction of the drying dressing roller (202).

7. A drying device for preparing alpha gypsum using titanium gypsum according to claim 6, characterized in that: The top side of the feeding shell (301) is respectively connected to a pressure regulating pipeline (302), a pressure relief pipeline (303) and a gypsum feeding pipeline (304); an air pressure sensor (306) is provided on the pressure relief pipeline (303); an electromagnetic valve (305) is provided on the gypsum feeding pipeline (304); and the output end of the digital display control panel (7) is respectively electrically connected to the input end of the electromagnetic valve (305) and the air pressure sensor (306).

8. The drying device for preparing alpha gypsum using titanium gypsum according to claim 1, characterized in that: The lower discharge shell assembly (4) comprises a discharge shell (401), the cross-sectional shape of the discharge shell (401) is rectangular, a rotating chamber (403) is formed in the discharge shell (401), a rotating shaft is rotatably arranged in the rotating chamber (403), and three or more discharge blades (404) are evenly distributed around the rotating shaft. A second rotary drive motor (405) for driving the rotating shaft to rotate is fixedly arranged on the discharge shell (401), and when the second rotary drive motor (405) drives the discharge blades (404) to rotate in the rotating chamber (403), at least two discharge blades (404) are sealed and abutted against the inner wall of the rotating chamber (403), and the output end of the digital display control panel (7) is electrically connected to the input end of the second rotary drive motor (405).

9. A drying device for preparing alpha gypsum using titanium gypsum according to claim 8, characterized in that: The material receiving assembly (6) comprises a material receiving box (601), and hydraulic cylinders (603) are symmetrically distributed around the material receiving box (601) on both sides thereof, the hydraulic cylinders (603) being fixedly arranged on the base (1), and push rods (604) are fixedly arranged on the push rod heads of the hydraulic cylinders (603) facing upwards, and side plates (602) are fixedly arranged on both sides of the top of the material receiving box (601), and positioning slots for positioning and cooperating with the push rods (604) are provided on the lower sides of the side plates (602), and a pressing cover (402) for cooperating and connecting with the upper opening of the material receiving box (601) is fixedly arranged on the outer side of the bottom end of the material discharging shell (401), and the output end of the digital display control panel (7) is electrically connected to the input end of the hydraulic cylinder (603).

10. A drying method for preparing alpha gypsum using titanium gypsum, using the drying device for preparing alpha gypsum using titanium gypsum as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Open the solenoid valve (305) and add gypsum from the gypsum feeding pipe (304) into the feeding shell (301) for storage. When the gypsum is dried, close the solenoid valve (305) and connect the pressure regulating pipe (302) and the external air pressure regulating device to each other, so that positive pressure and negative pressure can be achieved in the feeding shell (301). When the pressure is positive, the dressing hopper (307) can apply the material to the outside of the drying dressing roller (202). When the pressure is negative, the dressing hopper (307) stops discharging the material to the drying dressing roller (202); S2: When the dressing hopper (307) discharges material toward the outside of the drying dressing roller (202), the first rotary drive motor (205) drives the drying dressing roller (202) to rotate. During the rotation of the drying dressing roller (202), the dressing hopper (307) is used to spread and flatten the gypsum on the outside of the drying dressing roller (202). At this time, the heating pipe assembly (5) transports hot air into the drying dressing roller (202) to heat and dry the gypsum. S3: In step S2, the electric heater (203) provided in the drying dressing roller (202) is capable of heating the roller, thereby achieving double-sided heating and drying of the gypsum from the inside to the outside, wherein the annular groove (204) is capable of achieving the circulation of hot air and increasing the laying area of ​​the gypsum on the outside of the drying dressing roller (202); S4: During the rotation of the drying dressing roller (202), when the drying dressing roller (202) is loaded at the dressing hopper (307), and rotates to the scraper assembly (8), the gypsum is dried, and the scraper (802) scrapes off the gypsum on the outer surface of the drying dressing roller (202) and drops it into the discharge housing (401). The gypsum accumulates in the discharge housing (401), and the discharge blade (404) rotates to push the gypsum downward and drop it into the receiving box (601).

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