CN111196690A

CN111196690A - Integrated form gypsum calcining device

Info

Publication number: CN111196690A
Application number: CN202010154183.8A
Authority: CN
Inventors: 王立明
Original assignee: Ningxia Bode Gypsum Research Institute (limited Company)
Current assignee: Ningxia Bode Gypsum Research Institute (limited Company)
Priority date: 2020-03-07
Filing date: 2020-03-07
Publication date: 2020-05-26

Abstract

The invention discloses an integrated gypsum calcining device, wherein a kiln body can be divided into a preheating drying section, a calcining section and a cooling section, and the device comprises a feeder, a tail gas collecting pipe, a flue gas connecting pipe, a flue gas chamber, a kiln body, a first guide plate, a wheel belt, a gear ring, a flue gas heat exchange chamber, a flue gas heat exchange pipe, a flue gas pipe support ring, a heat dissipation plate, a flue gas circulating chamber, a second guide plate, a cold air collecting chamber, a cold air box, a cold air pipe support ring, a discharging box and a cold air distribution chamber. According to the gypsum integrated calcining device, the preheating drying section, the calcining section and the cooling section are arranged, so that the gypsum integrated calcining device integrating three functions of rapid preheating drying, efficient calcining and rapid cooling is formed, low-temperature flue gas after heat exchange of the flue gas heat exchange chamber circularly enters the heat exchange tube arranged on the inner surface of the kiln body for double-return heat exchange through the heat exchange chamber structure with a large heat exchange area arranged inside, the heat exchange area of the calcining section of the device is increased through the arrangement of the structure, and meanwhile, the heat exchange efficiency of materials is also improved.

Description

Integrated form gypsum calcining device

Technical Field

The invention relates to the field of gypsum calcining equipment, in particular to an integrated gypsum calcining device.

Background

In recent years, the gypsum industry in China is rapidly developed, the types of gypsum production raw materials are gradually increased, and industrial byproduct gypsum raw materials become main sources for producing gypsum products. The production scale of each gypsum production enterprise is gradually changed to scale, gypsum production equipment is not a production instrument only with a calcining function any more, and the gypsum production equipment gradually changes to integrated equipment integrating the functions of raw material drying, efficient calcining, clinker cooling and the like as time goes on.

The industrial by-product gypsum is used as a main raw material for producing gypsum products, the interior of the gypsum product contains a certain proportion of attached water, and the industrial by-product gypsum can be quickly dried only by configuring independent drying equipment in the production process and then can be put into the next production link; after the clinker is calcined, the residual temperature can affect the quality of gypsum due to overhigh temperature, and the continuity of subsequent grinding, packaging and other processes can be affected by higher temperature, so that an independent cooling system is required to cool the clinker. The gypsum production system adopted at present completes three functions of waste heat drying, calcining and cooling through the cooperation of independent equipment, so that the production process of gypsum products becomes complicated, the configuration of accessory equipment is increased, and the production quality management is not facilitated. Therefore, a need exists for a calcining apparatus that overcomes the tedious production process of prior art in which multiple devices respectively complete the drying, calcining and cooling steps, and that integrates the drying, calcining and cooling functions into a whole, so as to improve the heat exchange efficiency during the production of gypsum products, increase the mass production of enterprises, simplify the gypsum production process steps, and improve the yield.

Disclosure of Invention

In order to overcome the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide an integrated gypsum calcination apparatus.

The invention is realized by adopting the following technical scheme: an integrated gypsum calcining device comprises a feeder, a tail gas collecting pipe, a flue gas connecting pipe, a flue gas chamber, a kiln body, a first guide plate, a wheel belt, a gear ring, a flue gas heat exchange chamber, a flue gas heat exchange pipe, a flue gas pipe support ring, a heat dissipation plate, a flue gas circulating chamber, a second guide plate, a cold air collecting chamber, a cold air box, a cold air pipe support ring, a discharging box and a cold air distribution chamber, wherein the feeder comprises a feeding hole, a feeding box, a spiral feeding shaft, a discharging hole and a motor; the feeding hole is formed in the upper surface of the left section of the feeding box; the spiral feeding shaft is arranged inside the feeding box; the horizontal axis of the spiral feeding shaft is parallel to the horizontal axis of the feeding box; the motor is arranged at the left end of the feeding box and drives the spiral feeding shaft to rotate; the feed opening is formed in the lower surface of the right end of the feed box; a tail gas collecting pipe is arranged outside the feeder; a smoke collecting pipe is arranged at one end of the tail gas collecting pipe; more than one smoke connecting pipe is arranged on the outer surface of the smoke collecting pipe; the tail gas collecting pipe, the smoke collecting pipe and the smoke connecting pipe are communicated; the kiln body is divided into a preheating drying section, a calcining section and a cooling section; a flue gas chamber is arranged on the outer surface of the kiln body preheating and drying section; the inner surface of the calcining section of the kiln body is provided with a flue gas heat exchange chamber and a flue gas circulating chamber; more than one flue gas heat exchange tube is arranged on the inner surface of the calcining section of the kiln body along the circumferential direction; the flue gas chamber is communicated with the flue gas heat exchange chamber; the flue gas heat exchange chamber is communicated with the flue gas heat exchange tube through a flue gas circulation chamber; the flue gas heat exchange pipe is communicated with the flue gas connecting pipe; more than one flue gas pipe support ring is arranged on the inner surface of the kiln body; the flue gas heat exchange tube is fixed on the inner surfaces of the kiln body and the flue gas heat exchange chamber through a flue gas tube support ring; more than one first material guide plate is arranged on the inner surface of the preheating and drying section in the kiln body; more than one heat dissipation plate is arranged on the inner surface of the calcining section in the kiln body; a second material guide plate is arranged on the inner surface between the calcining section and the cooling section in the kiln body; a cold air collecting chamber is arranged on the inner surface of the kiln body cooling section; a cold air box is arranged on the outer surface of the kiln body at a position corresponding to the cold air collecting chamber; an air outlet is formed in the upper surface of the cold air box; the cold air collecting chamber is communicated with the cold air box through a through hole arranged on the surface of the joint of the cold air collecting chamber and the cold air box; more than one layer of cold air pipes are arranged on the inner surface of the kiln body cooling section according to the circumference; a cold air distribution chamber is arranged on the other side of the kiln body cooling section; the cold air collecting chamber is communicated with the cold air distributing chamber through a cold air pipe; more than one cold air pipe support ring is arranged on the inner surface of the kiln body cooling section; the cold air pipe is fixed on the inner surface of the kiln body by the cold air pipe support ring; the outer surface of the kiln body cooling section is also provided with a discharging box; wheel belts are arranged on the outer surfaces of the calcining section and the cooling section of the kiln body; and the outer surface of the calcining section of the kiln body is also provided with a gear ring.

The feeder is positioned at the lower end of the axle center of the tail gas collecting pipe; the lower surface of the feeding box is contacted with the inner surface of the lower end of the axle center of the tail gas collecting pipe; the tail gas collecting pipe is a hollow cylinder; the tail gas collecting pipe also comprises a gas outlet and a gas inlet; the gas outlet is positioned on the outer surface of the tail gas collecting pipe outside the kiln body; the air inlet is positioned at one end of the tail gas collecting pipe inside the kiln body.

The smoke collecting pipe is a hollow cylinder; one end of the smoke collecting pipe is communicated with the tail gas collecting pipe; the other end of the smoke collecting pipe is sealed; the central axis of the smoke connecting pipe arranged on the outer surface of the smoke collecting pipe is vertical to the central axis of the smoke collecting pipe; the flue gas connecting pipe communicates the flue gas collecting pipe with the flue gas heat exchange pipe.

The flue gas chamber is in a long cubic shape; the cross section of the flue gas heat exchange chamber is in a concentric circle shape; the flue gas heat exchange tube stretches across the preheating drying section and the calcining section of the kiln body; the flue gas circulating chamber is an annular pipeline with an opening on the side surface; the flue gas circulating chamber is communicated with more than one flue gas heat exchange tube; the smoke circulating chamber is fixed on the inner surface of the kiln body and is concentric and coaxial with the kiln body.

The first material guide plate is positioned between every two adjacent flue gas heat exchange tubes arranged in the preheating drying section; the first material guide plates and the kiln body are arranged in an angle of 25-45 degrees in the radial direction, and all the first material guide plates are matched with each other to form a spiral shape; the heat dissipation plates are positioned between every two adjacent flue gas heat exchange tubes arranged at the calcining section; the plate surface of the heat dissipation plate is parallel to the central axis of the flue gas heat exchange tube; the second material guide plate and the kiln body are radially arranged at an angle of 25-45 degrees; the second material guide plate is an arc-shaped plate surface; one end of the second material guide plate is fixedly connected with the bottom edge of the flue gas circulation chamber and is fixedly connected with the inner surface of the kiln body; the other end of the second material guide plate is fixedly connected with the outer surface of the cold air collecting chamber and extends forwards to form a part of plate surface; the first material guide plate and the second material guide plate have the function of assisting materials to move forwards.

The cross section of the cold air collecting chamber is in a concentric circle shape; the cold air pipe is arranged in the cooling section of the kiln body from outside to inside; more than one cold air pipe is arranged on each layer, and the number of the cold air pipes on each layer is the same.

An outlet is arranged on the outer surface of the kiln body cooling section corresponding to the discharge box, and materials can enter the discharge box through the outlet; the discharging box is a concentric cylinder; the lower surface of the discharge box is provided with a circular truncated cone-shaped discharge hole.

The kiln body is operated by a wheel belt and a gear ring which are arranged on the outer surfaces of the calcining section and the cooling section of the kiln body, and a motor, a speed reducer and other devices which are matched with the gear belt and the gear ring to realize that the kiln body rotates by taking a central shaft as a reference.

After adopting the structure, the invention has the beneficial effects that: the gypsum integrated calcining device has reasonable structural design, and the gypsum integrated calcining device integrating three functions of quick preheating and drying, efficient calcining and quick cooling is formed by arranging the preheating and drying section, the calcining section and the cooling section, so that the production process is simplified, and the working efficiency is improved; by adopting the heat exchange chamber structure with large heat exchange area arranged in the rotary calcining device, low-temperature flue gas after heat exchange of the flue gas heat exchange chamber circularly enters the heat exchange tube arranged on the inner surface of the kiln body to carry out double-return heat exchange, the arrangement of the structure improves the heat exchange area of the calcining section of the equipment and also improves the heat exchange efficiency of the material; the cooling section is provided with a cluster type cold air pipe structure, and the gypsum is rapidly cooled by cold air through a cooling pipe, so that the temperature of the calcined gypsum clinker with higher temperature is rapidly reduced, and the continuous operation of the subsequent conveying and grinding processes of the production line is ensured; on the basis of a conventional calcining kiln, the heat exchange structure is further optimized, the heat exchange efficiency is improved, meanwhile, the integration of the drying, calcining and cooling functions eliminates the influence factors of equipment configuration in production, and is beneficial to the large-scale production of gypsum products.

Drawings

FIG. 1 is a schematic structural view of the present invention:

FIG. 2 is a schematic cross-sectional view of a feeder, an exhaust gas collection pipe and a kiln body in feeding according to the present invention;

FIG. 3 is a schematic cross-sectional view of a preheat drying section of the present invention including a flue gas chamber;

FIG. 4 is a schematic cross-sectional view of a calcination section according to the present invention;

FIG. 5 is a schematic cross-sectional view of a cooling section of the present invention;

FIG. 6 is a schematic cross-sectional view of a portion of a preheat drying section of the present invention including a flue gas collection duct;

wherein: 1. a feeder; 101. a feed inlet; 102. a feeding box; 103. a helical feed shaft; 104. a feeding port; 105. a motor; 2. a tail gas collecting pipe; 201. an air outlet; 202. an air inlet; 3. a smoke collecting pipe; 4. a flue gas connecting pipe; 5. a flue gas chamber; 6. a kiln body; 601. a preheating and drying section; 602. a calcination section; 603. a cooling section; 7. a first material guide plate; 8. a belt wheel; 9. a ring gear; 10. a flue gas heat exchange chamber; 11. a flue gas heat exchange pipe; 12. a flue gas pipe support ring; 13. a heat dissipation plate; 14. a flue gas circulation chamber; 15. a second material guide plate; 16. a cold air collection chamber; 17. a cold air box; 18. a cold air pipe; 19. a cold air pipe support ring; 20. a discharging box; 21. a cold air distribution chamber.

Detailed Description

As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, an integrated gypsum calcining apparatus includes a feeder 1, an exhaust gas collecting pipe 2, a flue gas collecting pipe 3, a flue gas connecting pipe 4, a flue gas chamber 5, a kiln body 6, a first guide plate 7, a wheel belt 8, a gear ring 9, a flue gas heat exchange chamber 10, a flue gas heat exchange pipe 11, a flue gas pipe support ring 12, a heat dissipation plate 13, a flue gas circulating chamber 14, a second guide plate 15, a cold air collecting chamber 16, a cold air box 17, a cold air pipe 18, a cold air pipe support ring 19, a discharge box 20 and a cold air distributing chamber 21, wherein the feeder 1 includes a feed port 101, a feed box 102, a spiral feed shaft 103, a discharge port 104 and a motor 105; the feed inlet 101 is arranged on the upper surface of the left section of the feed box 102; the spiral feeding shaft 103 is arranged inside the feeding box 102; the horizontal axis of the screw feed shaft 103 is parallel to the horizontal axis of the feed box 102; the motor 105 is arranged at the left end of the feeding box 102 and drives the spiral feeding shaft 103 to rotate; the feed opening 105 is arranged on the lower surface of the right end of the feed box 102; a tail gas collecting pipe 2 is arranged outside the feeder 1; the feeder 1 is positioned at the lower end of the axle center of the tail gas collecting pipe 2; the lower surface of the feeding box 1 is contacted with the inner surface of the lower end of the axle center of the tail gas collecting pipe 2; the tail gas collecting pipe 2 is a hollow cylinder; the tail gas collecting pipe 2 further comprises a gas outlet 201 and a gas inlet 202; the gas outlet 201 is positioned on the outer surface of the tail gas collecting pipe 2 outside the kiln body 6; the gas inlet 202 is positioned at one end of the tail gas collecting pipe 2 in the kiln body 6; a smoke collecting pipe 3 is arranged at one end of the tail gas collecting pipe 2, and the smoke collecting pipe 3 is a hollow cylinder; one end of the smoke collecting pipe 3 is communicated with the tail gas collecting pipe 2; the other end of the smoke collecting pipe 3 is sealed; more than one flue gas connecting pipe 4 is arranged on the outer surface of the flue gas collecting pipe 3; the central axis of a flue gas connecting pipe 4 arranged on the outer surface of the flue gas collecting pipe 3 is vertical to the central axis of the flue gas collecting pipe 3, and the flue gas connecting pipe 4 is used for communicating the flue gas collecting pipe 3 with a flue gas heat exchange pipe 11; the tail gas collecting pipe 2, the smoke collecting pipe 3 and the smoke connecting pipe 4 are communicated with each other; the kiln body 6 is divided into a preheating drying section 601, a calcining section 602 and a cooling section 603; a flue gas chamber 5 is arranged on the outer surface of the preheating and drying section 601 of the kiln body 6, and the flue gas chamber 5 is in a long cube shape; the inner surface of the calcining section 602 of the kiln body 6 is provided with a flue gas heat exchange chamber 10 and a flue gas circulation chamber 14, the cross section of the flue gas heat exchange chamber 10 is in a concentric circle shape, and the flue gas circulation chamber 14 is an annular pipeline with an opening on the side surface; the flue gas circulating chamber 14 is communicated with more than one flue gas heat exchange tube 11; the flue gas circulating chamber 14 is fixed on the inner surface of the kiln body 3 and is concentric and coaxial with the kiln body 3; more than one flue gas heat exchange tube 11 is arranged on the inner surface of the calcining section 602 of the kiln body 6 along the circumferential direction, and the flue gas heat exchange tube 11 stretches across the preheating drying section 601 and the calcining section 602 of the kiln body; the flue gas chamber 5 is communicated with a flue gas heat exchange chamber 10; the flue gas heat exchange chamber 10 is communicated with a flue gas heat exchange tube 11 through a flue gas circulation chamber 14; the flue gas heat exchange tube 11 is communicated with the flue gas connecting tube 4; more than one flue gas pipe support ring 12 is arranged on the inner surface of the kiln body 6; the flue gas heat exchange tube 11 is fixed on the inner surfaces of the kiln body 6 and the flue gas heat exchange chamber 10 through a flue gas tube support ring 12; more than one first material guide plate 7 is arranged on the inner surface of the preheating and drying section 601 in the kiln body 6; the first material guide plate 7 is positioned between every two adjacent flue gas heat exchange tubes 11 arranged in the preheating and drying section 601; the first material guide plates 7 and the kiln body 6 are arranged in an angle of 25-45 degrees in the radial direction, and all the first material guide plates 7 are matched with each other to form a spiral shape; more than one heat dissipation plate 13 is arranged on the inner surface of the calcining section 602 in the kiln body 6; the heat dissipation plate 13 is positioned between every two adjacent flue gas heat exchange tubes 11 arranged in the calcining section 602; the plate surface of the heat dissipation plate 13 is parallel to the central axis of the flue gas heat exchange tube 11; a second material guide plate 15 is arranged on the inner surface between the calcining section 602 and the cooling section 603 in the kiln body 6; the second material guide plate 15 and the kiln body 6 are radially arranged at an angle of 25-45 degrees; the second material guide 15 plate is an arc-shaped plate surface; one end of the second material guide plate 15 is fixedly connected with the bottom edge of the flue gas circulation chamber 14 and is fixedly connected with the inner surface of the kiln body 6; the other end of the second material guide plate 15 is fixedly connected with the outer surface of the cold air collecting chamber 16 and extends forwards to form a part of plate surface; the first material guide plate 7 and the second material guide plate 15 have the function of assisting materials to move forwards; the inner surface of the cooling section 603 of the kiln body 6 is provided with a cold air collecting chamber 16, and the cross section of the cold air collecting chamber 16 is in a concentric circle shape; a cold air box 17 is arranged on the outer surface of the kiln body 6 at the position corresponding to the cold air collecting chamber 16; an air outlet is formed in the upper surface of the cold air box 17; the cold air collecting chamber 16 is communicated with the cold air box 17 through a through hole arranged on the surface of the joint of the cold air collecting chamber 16 and the cold air box 17; more than one layer of cold air pipes 18 are circumferentially arranged on the inner surface of the cooling section 603 of the kiln body 6, the cold air pipes 18 are arranged in the cooling section 603 of the kiln body from outside to inside, more than one cold air pipe 18 is arranged on each layer, and the number of the cold air pipes 18 on each layer is the same; a cold air distribution chamber 21 is arranged on the other side of the cooling section 603 of the kiln body 6; the cold air collecting chamber 16 is communicated with a cold air distributing chamber 21 through a cold air pipe 18; more than one cold air pipe support ring 19 is arranged on the inner surface of the cooling section 603 of the kiln body 6; the cold air pipe 18 is fixed on the inner surface of the kiln body 6 by the cold air pipe support ring 19; the outer surface of the cooling section 603 of the kiln body 6 is also provided with a discharging box 20, and the discharging box 20 is a concentric cylinder; an outlet is arranged on the outer surface of the position, corresponding to the discharge box 20, of the cooling section 603 of the kiln body 6, materials can enter the discharge box through the outlet, and a circular truncated cone-shaped discharge hole is arranged on the lower surface of the discharge box 20; the outer surfaces of the calcining section 602 and the cooling section 603 of the kiln body 6 are provided with wheel belts 8; the outer surface of the calcining section 602 of the kiln body 6 is also provided with a gear ring 9.

The kiln body 6 is operated by a belt wheel 8 and a gear ring 9 which are arranged on the outer surfaces of the calcining section 602 and the cooling section 603 of the kiln body 6, and a motor, a speed reducer and other devices which are matched with the belt wheel 9 and the gear ring 9, so that the kiln body 6 rotates by taking a central shaft as a reference.

The materials enter the preheating and drying section 601 of the kiln body 6 through the feeder 1, the kiln body 6 is rotated through the belt pulley 8 and the gear ring 9 arranged on the outer surface of the kiln body 6 and the transmission devices such as the motor and the speed reducer which are matched with the belt pulley and the gear ring 9, and the materials move from the preheating and drying section 601 to the direction of the discharging box 20 through the calcining section 602 and the cooling section 603. In the material moving process, the material is contacted with the surface of the flue gas chamber 5 and the wall surface of the flue gas heat exchange tube 10 arranged in the preheating and drying section 601, the material is heated by the flue gas temperature in the flue gas chamber 5 and the flue gas temperature in the flue gas heat exchange tube 11, so as to complete the rapid temperature rise, preheating and drying of the material, then the material moves to the calcining section 602, the material is heated again through the direct contact with the surface of the flue gas heat exchange chamber 10 and the wall surface of the flue gas heat exchange tube 11, when the material reaches the vicinity of the flue gas circulation chamber 14, the purpose that the materials are converted into the semi-hydrated gypsum from the dihydrate gypsum is completed, finally, calcined gypsum clinker enters the cooling section 603 under the action of the second guide plate 15, the materials begin to exchange heat with the cold air pipe 18 arranged on the cooling section 603, the purpose of rapid cooling is realized, and finally the materials enter the discharge box 20 through an outlet arranged on the outer surface of the kiln body 6 of the cooling section 603 to be discharged.

The method is characterized in that fuels such as coal, natural gas and oil are combusted in the flue gas chamber 5 to generate high-temperature flue gas, a dust collection fan is arranged at a gas outlet 201 of the tail gas collecting pipe 2, the high-temperature flue gas generated in the flue gas chamber 5 enters the flue gas heat exchange chamber 10 of the calcining section 602 under the action of the dust collection fan, then the high-temperature flue gas is guided into the flue gas heat exchange pipeline 11 through the flue gas circulating chamber 14, finally enters the tail gas collecting pipe 2 through the flue gas connecting pipe 4 and the flue gas collecting pipe 3, and then is discharged to the.

Under the action of the cold air blower on the cold air box 17, cold air is gathered in the cold air collecting chamber 16 from the cold air distributing chamber 21 through the cold air pipe 18, and the cold air is discharged into the external environment through the cold air box 17 by the cold air collecting chamber 16.

The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. An integrated gypsum calcining device comprises a feeder, a tail gas collecting pipe, a flue gas connecting pipe, a flue gas chamber, a kiln body, a first guide plate, a wheel belt, a gear ring, a flue gas heat exchange chamber, a flue gas heat exchange pipe, a flue gas pipe support ring, a heat dissipation plate, a flue gas circulating chamber, a second guide plate, a cold air collecting chamber, a cold air box, a cold air pipe support ring, a discharging box and a cold air distribution chamber, wherein the feeder comprises a feeding hole, a feeding box, a spiral feeding shaft, a discharging hole and a motor; the feeding hole is formed in the upper surface of the left section of the feeding box; the spiral feeding shaft is arranged inside the feeding box; the horizontal axis of the spiral feeding shaft is parallel to the horizontal axis of the feeding box; the motor is arranged at the left end of the feeding box and drives the spiral feeding shaft to rotate; the feed opening is formed in the lower surface of the right end of the feed box; the method is characterized in that: a tail gas collecting pipe is arranged outside the feeder; a smoke collecting pipe is arranged at one end of the tail gas collecting pipe; more than one smoke connecting pipe is arranged on the outer surface of the smoke collecting pipe; the tail gas collecting pipe, the smoke collecting pipe and the smoke connecting pipe are communicated; the kiln body is divided into a preheating drying section, a calcining section and a cooling section; a flue gas chamber is arranged on the outer surface of the kiln body preheating and drying section; the inner surface of the calcining section of the kiln body is provided with a flue gas heat exchange chamber and a flue gas circulating chamber; more than one flue gas heat exchange tube is arranged on the inner surface of the calcining section of the kiln body along the circumferential direction; the flue gas chamber is communicated with the flue gas heat exchange chamber; the flue gas heat exchange chamber is communicated with the flue gas heat exchange tube through a flue gas circulation chamber; the flue gas heat exchange pipe is communicated with the flue gas connecting pipe; more than one flue gas pipe support ring is arranged on the inner surface of the kiln body; the flue gas heat exchange tube is fixed on the inner surfaces of the kiln body and the flue gas heat exchange chamber through a flue gas tube support ring; more than one first material guide plate is arranged on the inner surface of the preheating and drying section in the kiln body; more than one heat dissipation plate is arranged on the inner surface of the calcining section in the kiln body; a second material guide plate is arranged on the inner surface between the calcining section and the cooling section in the kiln body; a cold air collecting chamber is arranged on the inner surface of the kiln body cooling section; a cold air box is arranged on the outer surface of the kiln body at a position corresponding to the cold air collecting chamber; an air outlet is formed in the upper surface of the cold air box; the cold air collecting chamber is communicated with the cold air box through a through hole arranged on the surface of the joint of the cold air collecting chamber and the cold air box; more than one layer of cold air pipes are arranged on the inner surface of the kiln body cooling section according to the circumference; a cold air distribution chamber is arranged on the other side of the kiln body cooling section; the cold air collecting chamber is communicated with the cold air distributing chamber through a cold air pipe; more than one cold air pipe support ring is arranged on the inner surface of the kiln body cooling section; the cold air pipe is fixed on the inner surface of the kiln body by the cold air pipe support ring; the outer surface of the kiln body cooling section is also provided with a discharging box; wheel belts are arranged on the outer surfaces of the calcining section and the cooling section of the kiln body; and the outer surface of the calcining section of the kiln body is also provided with a gear ring.

2. An integrated gypsum calcination apparatus according to claim 1, wherein: the feeder is positioned at the lower end of the axle center of the tail gas collecting pipe; the lower surface of the feeding box is contacted with the inner surface of the lower end of the axle center of the tail gas collecting pipe; the tail gas collecting pipe is a hollow cylinder; the tail gas collecting pipe also comprises a gas outlet and a gas inlet; the gas outlet is positioned on the outer surface of the tail gas collecting pipe outside the kiln body; the air inlet is positioned at one end of the tail gas collecting pipe inside the kiln body.

3. An integrated gypsum calcination apparatus according to claim 1, wherein: the smoke collecting pipe is a hollow cylinder; one end of the smoke collecting pipe is communicated with the tail gas collecting pipe; the other end of the smoke collecting pipe is sealed; the central axis of the smoke connecting pipe arranged on the outer surface of the smoke collecting pipe is vertical to the central axis of the smoke collecting pipe; the flue gas connecting pipe communicates the flue gas collecting pipe with the flue gas heat exchange pipe.

4. An integrated gypsum calcination apparatus according to claim 1, wherein: the flue gas chamber is in a long cubic shape; the cross section of the flue gas heat exchange chamber is in a concentric circle shape; the flue gas heat exchange tube stretches across the preheating drying section and the calcining section of the kiln body; the flue gas circulating chamber is an annular pipeline with an opening on the side surface; the flue gas circulating chamber is communicated with more than one flue gas heat exchange tube; the smoke circulating chamber is fixed on the inner surface of the kiln body and is concentric and coaxial with the kiln body.

5. An integrated gypsum calcination apparatus according to claim 1, wherein: the first material guide plate is positioned between every two adjacent flue gas heat exchange tubes arranged in the preheating drying section; the first material guide plates and the kiln body are arranged in an angle of 25-45 degrees in the radial direction, and all the first material guide plates are matched with each other to form a spiral shape; the heat dissipation plates are positioned between every two adjacent flue gas heat exchange tubes arranged at the calcining section; the plate surface of the heat dissipation plate is parallel to the central axis of the flue gas heat exchange tube; the second material guide plate and the kiln body are radially arranged at an angle of 25-45 degrees; the second material guide plate is an arc-shaped plate surface; one end of the second material guide plate is fixedly connected with the bottom edge of the flue gas circulation chamber and is fixedly connected with the inner surface of the kiln body; the other end of the second material guide plate is fixedly connected with the outer surface of the cold air collecting chamber and extends forwards to form a part of plate surface; the first material guide plate and the second material guide plate have the function of assisting materials to move forwards.

6. An integrated gypsum calcination apparatus according to claim 1, wherein: the cross section of the cold air collecting chamber is in a concentric circle shape; the cold air pipe is arranged in the cooling section of the kiln body from outside to inside; more than one cold air pipe is arranged on each layer, and the number of the cold air pipes on each layer is the same.

7. An integrated gypsum calcination apparatus according to claim 1, wherein: an outlet is arranged on the outer surface of the kiln body cooling section corresponding to the discharge box, and materials can enter the discharge box through the outlet; the discharging box is a concentric cylinder; the lower surface of the discharge box is provided with a circular truncated cone-shaped discharge hole.

8. An integrated gypsum calcination apparatus according to claim 1, wherein: the kiln body is operated by a wheel belt and a gear ring which are arranged on the outer surfaces of the calcining section and the cooling section of the kiln body, and a motor, a speed reducer and other devices which are matched with the gear belt and the gear ring to realize that the kiln body rotates by taking a central shaft as a reference.