CN205528352U - Disc mummification machine - Google Patents

Abstract

The utility model discloses a disc drying machine, which belongs to the field of drying (drying and cooling) of materials such as sludge, and is specifically a horizontal container with a shell jacket, in which two oppositely rotating heat exchangers are arranged. Dozens of hollow discs are densely arranged on the heat exchange shaft, and the hollow discs on the two shafts are arranged alternately to clean each other. This device is a high-efficiency indirect heat exchange device. Clean up the materials bonded to the disc and shaft, and strengthen the stirring of the materials, significantly improving the heat transfer efficiency. Compared with the traditional disc (rotating disc) dryer, it is more suitable for drying (drying, cooling), and can achieve drying and cooling in the same equipment.

Description

A disc drying machine

technical field

The utility model belongs to the field of drying (drying and cooling) of sludge and other materials, in particular to a disc drying machine. Compared with the traditional disc (rotating disc) dryer, because of its self-cleaning function, the two shafts are meshed with each other for stirring, and the heat transfer efficiency is high, it is more suitable for easily bonded materials such as sludge.

Background technique

The disc dryer is a clean and efficient heat exchange equipment, which can be widely used in drying, drying, cooling and other units of industrial production.

With the increasing amount of sludge to be treated in the world and people's increasingly stringent requirements for environmental protection, the harmless treatment of sludge has attracted widespread attention. Sludge from the water treatment plant after dehydration treatment by pressure filtration, centrifugation and other machinery is generally high in moisture, and cannot be directly incinerated, land use, landfill, resource treatment and other follow-up disposal, and must be heat-dried by a dryer .

The traditional disc drying machine follows the rotary disc (disc) machine invented by the Swedish Stord Company in the 1950s, and was later absorbed and transformed by the Japanese Mitsubishi Company and China Tiantong Co., Ltd., but the structure still has not broken through the Swedish Stord Company's structure. For the disc drying machine described in patent CN201310324207, highly viscous materials such as sludge are easily bonded to the stirring shaft during the drying process, and the phenomenon of "shaft holding" and sticking on the stirring shaft similar to the screw conveyor will gradually appear. Phenomenon on the disk wall. The fixed teeth fixed on the housing (some manufacturers call them mud cutters) are dozens of blades with a thickness of about 15 mm. The blades are inserted between adjacent discs, and the net gap between adjacent discs is about 100 mm. , so the fixed tooth can only block and cut part of the bulk material, does not have the self-cleaning function, and is easy to bend or fall off, so the material accumulates and becomes thicker, and the disc and shaft tube are wrapped with a thick layer of sludge , which eventually leads to a significant reduction in the processing capacity and efficiency of the equipment, and it is necessary to stop the machine and manually remove the bonded sludge. Therefore, traditional disc dryers are generally used for non-viscous or low-viscosity materials such as fish meal, distiller's grains, and inorganic sludge. Most of the sludge contains a large amount of organic matter. After heating, the temperature reaches about 80°C, and the high viscosity appears when the solid content is about 33%, and it will not be relieved until the solid content is 55%. This state is the sludge. "Adhesive phase", this "adhesive phase" is currently an insurmountable technical barrier for traditional disc dryers.

Invention content:

The technical problem to be solved by this utility model patent is to fundamentally solve the defects of the traditional disc dryer technology for more than half a century, and develop a disc dryer with remarkable self-cleaning function, high efficiency and stable operation. chemical machine.

In order to achieve the above object, the technical scheme of the utility model is:

A disc drying machine, including a motor reducer and a container, the outside of the container includes a shell, the outside of the shell is provided with a shell jacket, both ends of the shell are provided with end plates, and the top of the shell is There is a material inlet and an air outlet, and the bottom of the shell is provided with a material outlet. The material inlet and the air outlet are connected to the inside of the container, and two hollow heat exchange shafts are arranged in parallel inside the container. The heat exchange shaft is driven by the motor reducer and rotates in opposite directions. Several hollow discs are set at intervals on the heat exchange shaft. The discs are arranged in a staggered interval; at least one flat scraper and a pushing scraper are fixed on the outer edge of the disc.

The utility model can also have the following technical characteristics:

Preferably, both the flat scraper and the pushing scraper form an angle of 15-90° with the disc in the radial direction.

Further, the flat scraper and the disc may form an angle of 90° in the radial direction, and the pushing scraper and the disc may form an angle of 45° in the radial direction.

Further, the one or more flat scrapers and the pushing scrapers are evenly spaced apart from each other on the outer edge of the disc.

Preferably, the heat exchange shaft includes a shaft tube and a heat medium inlet and outlet device; the heat medium inlet and outlet device is located at one end of the shaft tube or at both ends of the shaft tube respectively, and the heat medium inlet and outlet device communicates with the shaft tube; The discs are welded vertically on the shaft tube successively.

Preferably, the heat medium of the drying machine is steam or heat transfer oil, and the disc structure of the two heat mediums and the structure of the heat medium device are different:

The disc with steam as the heat medium includes a disc shell, a partition plate, a steam inlet pipe, a condensed water outlet pipe, a water baffle, and a disc shell reinforcement column. The disc shell is in the shape of a hollow disc. The partition plate is located inside the disk shell and divides the inside of the disk into at least two petals, each of which is provided with a set of steam inlet pipe, condensate water outlet pipe and water baffle, and the steam inlet pipe and outlet The condensed water pipes are distributed on the shaft tube and connect the shaft tube with the disk. The condensed water outlet pipe is located between the partition plate and the water baffle. Welding of both side plates;

The disc with heat conduction oil as the heat medium includes a disc shell, an inlet heat conduction oil pipe, an outlet heat conduction oil pipe, and a reinforcement column for the disk shell. The disk is connected with the shaft tube, each of the heat-conducting oil pipes connects the disk with the casing, and the two ends of the multiple disk shell reinforcement columns are respectively welded to the two side plates of the disk shell;

The heat medium inlet and outlet device using steam as the heat medium includes a rotary joint and a siphon device. The rotary joint communicates with the shaft tube through a siphon device, one end of the siphon device is inserted into the bottom of the shaft tube, and the other end is inserted into the rotary joint and communicated with the rotary joint;

The heat medium inlet and outlet device using heat conduction oil as the heat medium includes a rotary joint, and the rotary joint communicates with the shaft tube; the rotary joint is single-channel or double-channel, and the shaft tube and the casing are changed accordingly.

Preferably, the shell jacket is a closed space provided with an inlet and outlet, including an outer shell, a pull pipe, a heat medium inlet and a heat medium outlet; the pull pipe is fixedly connected to the outer wall of the shell and the outer wall of the shell respectively, The heat medium inlet and heat medium outlet communicate with corresponding heat medium inlet and outlet devices respectively.

Preferably, when the heat medium is steam, the heat medium inlet and the heat medium outlet are respectively arranged at the highest point and the lowest point of the shell jacket; when the heat medium is heat transfer oil medium, the heat medium inlet and the heat medium outlet are respectively arranged at The lowest and highest points of the shell jacket.

Preferably, an overflow baffle, a sealing device, a bearing seat, a gear set, and a transmission device are also provided inside the container, the overflow baffle is arranged outside the outermost disc on the heat exchange shaft, and the sealing device is arranged on At the connection between each heat exchange shaft and the container, the bearing seat is arranged outside the sealing device to support the heat exchange shaft, and the gear set is arranged on the two heat exchange shafts close to the transmission device, and the transmission device is driven by a chain and a sprocket Or the motor reducer is directly connected to one of the heat exchange shafts.

Preferably, a partition is arranged inside the shaft tube and the shell jacket to divide the shaft tube and the shell jacket into two sections, one end is fed with a heat medium to dry the material, and the other end is fed with a refrigerant for cooling.

Another disc dryer provided by the utility model is: the heat exchange shafts of the above disc dryers are combined into a disc dryer with more than three axes, and all the heat exchange axes are in the same plane Arranged in parallel, the heat exchange shaft is driven by the motor reducer and the two adjacent heat exchange shafts rotate in opposite directions. Several hollow discs are set on the heat exchange shaft at intervals, and the heat exchange shaft on the one heat exchange shaft The discs and the discs on the other heat exchange shaft are arranged alternately and at intervals; at least one flat scraper and a pushing scraper are fixed on the outer edge of the disc.

Preferably, the container is horizontal.

The beneficial effects of the utility model:

Disc drying machine: (1) The self-cleaning function of the two heat exchange shafts is powerful, preventing material from sticking, significantly improving heat transfer efficiency, avoiding parking and manual removal of sticky materials, and improving work efficiency; (2) The same heat exchange area The diameter of the disc of the double-shaft disc dryer is much smaller than that of the single-shaft one, the difficulty of manufacturing and maintenance is reduced, the equipment cost is relatively low, and the operation failure rate is also low; (3) It is suitable for heat media such as steam and heat transfer oil, Cooling water can also be used as a refrigerant, as a disc cooler; (4) a partition can also be installed in the shaft tube and jacket, one end can be fed with heat medium for drying, and the other end can be fed with cooling water and other refrigerants for cooling, so as to realize One machine for two purposes; (5) It is suitable for high-viscosity materials, especially sludge with "sticky phase".

Description of drawings

The accompanying drawings are used to provide a further understanding of the utility model patent, and constitute a part of the description, and are used together with the embodiments of the utility model patent to explain the utility model patent, and do not constitute a limitation to the utility model patent. In the attached picture:

Figure 1 is a schematic diagram of the front view of the disc dryer;

Fig. 2 is a schematic diagram of a cross-sectional view of a disc drying machine;

Figure 3 is a schematic diagram of the heat exchange axis of the disc dryer;

Fig. 4 is a schematic diagram of steam and heat transfer oil disk;

Fig. 5 is a schematic diagram of steam and heat transfer oil entering and leaving the heat medium device.

Explanation of reference signs:

Container 1; heat exchange shaft 2; overflow baffle 3; sealing device 4; 12; sprocket 13; motor reducer 14; material inlet 15; air outlet 16; inspection port 17; disk 18; shell 19; heat medium inlet 20; pipe 21; outer shell 22; shell jacket 23 Pushing scraper 24; flat scraper 25; heat medium outlet 26; front shaft head 27; shaft tube 28; rear shaft head 29; into the heat conduction oil pipe 34; casing 35; out of the heat conduction oil pipe 36; rotary joint 37;

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

detailed description

Below in conjunction with specific embodiment, the utility model is described in detail.

Example 1

As shown in Figure 1-3, a disc drying machine includes a motor reducer 14 and a container 1. The container 1 includes a shell 19 outside the shell 19. A shell jacket 23 is provided on the outside of the shell 19. The two ends of the shell 19 Both are provided with front and rear end plates 7, the top of the housing 19 is provided with a feed port 15, an air outlet 16 and an inspection port 17, the bottom of the housing 19 is provided with a discharge port 9, a feed port 15, an air outlet 16. Both the inspection port 17 and the discharge port 9 are connected to the interior of the container 1. Two hollow heat exchange shafts 2 driven by the motor reducer 14 and rotating in opposite directions are arranged in parallel in the interior of the container 1. Specifically, each heat exchange shaft 2 can be Gears are arranged on them to form a gear set 10 , specifically, the gear set 10 is set on the two heat exchange shafts 2 close to the transmission device 11 . The transmission device 11 drives the drive shaft, and the driven shaft and the drive shaft rotate oppositely under the action of the gear set 10 . Several hollow discs 18 are evenly spaced on the heat exchange shaft 2, and the discs 18 on the two heat exchange shafts 2 are arranged at staggered intervals. materials. There are two flat scrapers 25 and pusher scrapers 24 on the outer edge of the disc 18 and are evenly spaced on the outer edge of the disc 18 . At least one flat scraper 25 and pusher scraper 24 are fixed; the flat scraper 25 and the pusher scraper 24 have an angle setting with the disc 18, specifically, the flat scraper 25 can be radially aligned with the disc 18 At an angle of 90°, the pusher scraper 24 and the disc 18 form an angle of 45° in the radial direction, so that the flat scraper 25 hangs the material adhered to the disc on the other heat exchange shaft 2, and the pusher scraper 24 It mainly pushes the sludge to the discharge end. An overflow baffle 3, a sealing device 4, a bearing seat 5, a gear set 10, and a transmission device 11 are also provided inside the container 1, and the overflow baffle 3 is arranged outside the outermost disc 18 on the heat exchange shaft 2 for To ensure the filling rate of the material in the container; the sealing device 4 is arranged at the connection between each heat exchange shaft 2 and the container 1, and outside the front and rear end plates 7 of the container 1, to prevent the rotating heat exchange shaft 2 and the stationary container 1 The sealing device 4 is generally a stuffing box type, and when the sealing requirements are high, it can also be a mechanical seal or a combination of several seals; the bearing seat 5 is arranged outside the sealing device 4, specifically, it can be installed in the container The front and rear end plates 7 of 1 can also be directly supported on the foundation (or on the overall machine base) for supporting the heat exchange shaft 2. Specifically, the installation or removal of the heat exchange shaft 2 is completed by connecting the front and rear end plates 7 with the end flange of the housing 19 with bolts. The saddle 9 is arranged at the bottom of the container 1 for supporting the super disc dryer.

As shown in Fig. 1-3, specifically, the heat exchange shaft 2 includes a shaft tube 28 and a heat medium inlet and outlet device 6, and the disk 18 is welded and fixed vertically on the shaft tube 28 in sequence, and the two ends of the shaft tube 28 are respectively provided with front shaft heads 27 And the rear shaft head 29, the heat medium inlet and outlet device 6 is located at one end of the heat exchange shaft 2 or at both ends of the heat exchange shaft 2 respectively.

Specifically, the heat medium of the drying machine is steam or heat transfer oil, and the disc structures of the two heat medium are different, as shown in Figure 4:

The disc 18 using steam as the heat medium includes a disc shell 39, a steam inlet pipe 30, a condensed water outlet pipe 32, a water baffle 33, a partition plate 31, a disc shell reinforcing column 40, and a disc shell 39 It is in the shape of a hollow disc, and the disc shell 39 is welded by steel plates. The partition plate 31 evenly divides the inside of the disc 18 into two or more lobes, and a set of steam inlet pipe 30 and condensate outlet pipe are arranged in each lobe. Water pipe 32, water retaining plate 33. The steam inlet pipe 30 and the condensed water outlet pipe 32 are alternately distributed on the shaft pipe 28 and both connect the shaft pipe 28 and the disc 18, and the condensed water outlet pipe 32 is located between the partition plate 31 and the water retaining plate 33, when the disc 18 rotates When reaching a certain angle, the condensed water can be discharged from the disc 18 in time under the action of gravity. The flat scraper 25 and the pushing scraper 24 are welded or bolted on the outer circle of the disc 18 and distributed at a certain angle. The main function of the flat scraper 25 is to stir and scrape up the sludge on the inner wall of the container 1, and clean up the bonding material on the disk 18 and the shaft tube 28 on the other shaft. The pushing scraper 24 forms a certain angle with the disc 18, and mainly pushes the sludge to the discharge end, and also has the function of removing the bonded sludge. Several disk casing reinforcement columns 40 are arranged on the disk casing 39 both sides plates, and the two ends of a plurality of disk casing reinforcement columns 40 are welded with the disk casing 39 both sides plates respectively, guarantee that the disk casing 39 under pressure.

The disc 18 using heat transfer oil as the heat medium includes a disc shell 39, an inlet heat transfer oil pipe 34, an outlet heat transfer oil pipe 36, a partition plate 31, a disc shell reinforcement column 40, and a sleeve is arranged inside the shaft tube 28. 35. The inlet heat conduction oil pipe 34 communicates the disk 18 with the shaft pipe 28, and each outlet heat conduction oil pipe 36 communicates the disk 18 with the casing 35. The other parts of the disc 18 have the same structure as the disc 18 in which steam is the heat medium.

Specifically, the center of the disc 18 is thick and the edge is thin, similar to two plates buckled together, so it is called a disc or a rotating disc. The shape of the disc can also be specially designed according to the requirements of the material.

Concretely, the structures of the heat medium devices 6 entering and exiting the two kinds of heat medium are different, as shown in Figure 5:

The inlet and outlet heat medium device 6 that uses steam as the heat medium includes a rotary joint 37 and a siphon device 38. The rotary joint 37 is connected to the shaft head. connected, the saturated steam enters the shaft tube 28 from the rotary joint 37, and the steam enters the cavity of the disc 18 along the many steam inlet tubes 30. After exchanging heat with the material, the condensed water will gather at the bottom of the disc 18, With the rotation of the disc 18, the condensed water is carried up by the partition plate 31. When this part of the condensed water rotates to the upper part, under the common blocking of the partition plate 31 and the water baffle 33, under the action of gravity, the condensed water flows out along the condensed water pipe 32. Drain into the shaft tube 28, all condensed water is collected at the bottom of the shaft tube 28, and the siphon device 38 and the rotary joint 37 are discharged out of the dryer in time. The principle of the entry and exit of steam is as above, but the specific structure can be different.

The inlet and outlet heat medium device 6 using heat transfer oil as the heat medium includes a rotary joint 37 and a sleeve 35. The rotary joint 37 is a single-channel type or a double-channel type. The single-channel type only enters or exits the heat medium, and the front shaft head 27 and The rear shaft head 29 is respectively equipped with a rotary joint 37, the dual-channel type can enter and exit the heat medium at the same time, the rotary joint 37 is only set at one end of the heat exchange shaft 2, usually the discharge end, and the heat transfer oil with a certain pressure flows from the rotary joint 37 enters the shaft tube 28, and enters into the cavity of the disc 18 along a plurality of heat-conducting oil pipes 34 under the action of pressure. Afterwards, it is discharged out of the drying machine through the rotary joint 37 along the casing casing 35 . The principle of the heat transfer oil entering and exiting is as above, but the specific structure may be different.

Specifically, the transmission device 11 is driven by a chain 12 and a sprocket 13 or is directly connected to one of the heat exchange shafts 2 by a motor reducer 14 .

Specifically, the shell jacket 23 is a closed space with an inlet and outlet, including an outer shell 22, a pull pipe 21, a heat medium inlet 20 and a heat medium outlet 26, and the shell jacket 23 is filled with heat medium to form heat exchange. Jacket; the pull pipe 21 is arranged in a triangle or square and is fixedly connected to the outer wall of the shell 19 and the outer shell 22 respectively to ensure that the jacket is under pressure; when the heat medium is steam, the heat medium inlet 20 and the heat medium outlet 26 are respectively set At the highest point and the lowest point of the shell jacket 23, it is ensured that the condensed water can be discharged smoothly and in time; At the top and the highest point, it is guaranteed that the jacket 23 is filled with heat medium. The heat medium inlet 20 and the heat medium outlet 26 communicate with the corresponding heat medium inlet and outlet devices 6 respectively.

Specifically, the shaft tube 28 and the housing jacket 23 are provided with partitions, and the shaft tube 28 and the housing jacket 23 are divided into two sections, one end is fed with a heat medium to dry the material, and the other end is fed with a refrigerant such as cooling water. Cooling, to achieve a dual-purpose machine.

Specifically, the container 1 is horizontal, and two heat exchange shafts 2 are arranged horizontally and parallel inside the container 1 .

Specifically, both the heat exchange shaft 2 and the heat exchange jacket 23 contain pressurized heat medium or refrigerant, so the design, manufacture and inspection regulations of pressure vessels must be followed.

Specifically, the above-mentioned heat exchange shafts 2 of the disc dryer are combined into a disc dryer with more than three shafts. The two adjacent heat exchange shafts 2 are driven to rotate in opposite directions. Several hollow discs 18 are set at intervals on the heat exchange shaft 2. The discs 18 on one heat exchange shaft 2 are connected with the other heat exchange shaft 2 The discs 18 are arranged at staggered intervals; at least one flat scraper 25 and pusher scraper 24 are fixed on the outer edge of the disc 18, such as a 3-axis drying machine or a 4-axis drying machine, so that multiple axes can work quickly and efficiently at the same time. High quality dried sludge.

Specifically, if the above-mentioned drying machine using heat transfer oil as a heat medium is used as a cooling machine, when the disc drying machine uses cooling water as a cooling medium, it can be used as a disc 18 cooling machine.

How to use: The sludge waiting to be processed is continuously fed into the container 1 of the dryer from the feed port 15 on the upper part of the drive end of the super disc dryer, and the material is stirred by two heat exchange shafts 2 rotating in opposite directions. Steam or heat-conducting oil are respectively sent into the shaft tube 28 from the heat medium inlet and outlet device 6 of the heat exchange shaft 2, and are evenly distributed into dozens of hollow discs 18, and at the same time, the steam or heat-conducting oil is passed into the shell clamp In the sleeve 23 , the material to be treated conducts heat transfer with the heat medium under the joint action of the three heat exchange areas of the disc 18 , the shaft tube 28 , and the shell jacket 23 . The flat scraper 25 set on the disc 18 scrapes and stirs the material, and the pushing scraper 24 set on the disc 18 transports the material to the discharge end step by step, and the material meeting the requirements overflows from the top of the overflow baffle 3 flow, and then discharged from the drying machine from the discharge port 9. The interlaced disks 18 on the two heat exchange shafts 2 clean up the materials adhered to the wall surface of the disks 18 and the shaft tube 28 in real time, and strengthen the stirring effect on the materials, and the materials close to the heat transfer area are updated in time , so that the drying efficiency and heat transfer efficiency are significantly improved. When the heat medium is steam, the condensed water after steam heat transfer in the two heat exchange shafts 2 gathers at the bottom of the shaft tubes 28, and is discharged from the equipment in time by the siphon device 38 and the rotary joint 37. When the heat medium is heat transfer oil, the heat transfer oil in the disks 18 on the two heat exchange shafts 2 is collected into the casing 35 by each outlet heat transfer oil pipe 36 and discharged from the equipment by the rotary joint 37 . The evaporated water vapor is discharged from the air outlet 16 on the top of the container 1 and enters the post-processing device.

Example 2

Taking the super disc dryer for sludge drying with a dehydration capacity of 3.5T/h as an example, the outer diameter of the disc 18 is 1.65 meters, and the diameter of the shaft tube 28 is 0.63 meters. 50 disks 18 are evenly arranged on the shaft 2, and the net gap between two adjacent disks 18 is 10mm when they rotate. The shell 19 is equipped with a shell jacket 23, and the total heat exchange area is 450㎡. The overall size of the equipment is 13M*3.5M*3.2M, the power of the equipment is 110KW, the speed of the two heat exchange shafts is 2-5RPM, the heat source is 0.6Mpa saturated steam, and the moisture content of the sludge feed is 80%. The water content of the sludge is about 40%. The equipment can successfully pass through the "glue phase" of the sludge, and the self-cleaning effect is remarkable. There is no need to stop the machine for manual cleaning or add dry materials for back-mixing. A single set of equipment can meet the sludge treatment requirement of 120 tons per day, and the moisture content is from 80% to 40%. By adjusting the amount of sludge added or the height of the overflow baffle, that is, adjusting the residence time of the sludge, the water content of the sludge can be different, which can meet the requirements of landfill, land use, incineration, and resource disposal.

Although the embodiments and comparative examples of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and purpose of the present invention , replacement and modification, the scope of the present utility model is defined by the claims and their equivalents.

Claims (9)

1. A disc drying machine, comprising a motor reducer (14) and a container (1), the container (1) outside includes a housing (19), and the outside of the housing (19) is provided with a housing jacket (23), both ends of the housing (19) are provided with end plates (7), and the top of the housing (19) is provided with a feed inlet (15), an air outlet (16), and the housing (19) The bottom is provided with a material outlet (9), and the material inlet (15), the air outlet (16) and the material outlet (9) are all communicated with the inside of the container (1), and it is characterized in that the inside of the container (1) Two hollow heat exchange shafts (2) are arranged in parallel. The heat exchange shafts (2) are driven by the motor reducer (14) and rotate in opposite directions. Several hollow circles are arranged on the heat exchange shafts (2) at intervals. discs (18), the discs (18) on the one heat exchange shaft (2) and the discs (18) on the other heat exchange shaft (2) are alternately arranged at intervals; the discs (18) At least one flat scraper (25) and pushing scraper (24) are fixed on the outer edge. 2. A disc dryer according to claim 1, characterized in that, the one or more flat scrapers (25) and the pushing scraper (24) are on the outer edge of the disc (18) evenly spaced above. 3. A disc dryer according to claim 1, characterized in that, the heat exchange shaft (2) includes a shaft tube (28) and a heat medium inlet and outlet device (6); (6) Located at one end of the shaft tube (28) or respectively at both ends of the shaft tube (28), the heat medium inlet and outlet device (6) communicates with the shaft tube (28); the discs (18) are welded vertically in turn Fixed on the shaft tube (28). 4. A disc dryer according to claim 1, characterized in that the heat medium of the dryer is steam or heat transfer oil, the structure of the disc (18) of the two kinds of heat medium and the heat medium in and out The structure of device (6) is different: The disc (18) with steam as the heat medium includes a disc housing (39), a partition plate (31), a steam inlet pipe (30), a condensed water pipe (32), a water baffle (33), a round Disk casing reinforcement column (40), described disk casing (39) is a hollow disc shape, and described dividing plate (31) is positioned at the inside of disk casing (39) and will be in the disk (18) The part is at least two petals, and a set of steam inlet pipe (30), condensate water outlet pipe (32), and water baffle (33) are arranged in each petal, and the steam inlet pipe (30) and condensate water outlet pipe (32) distributed on the shaft tube (28) in a staggered manner and communicate with the shaft tube (28) and the disk (18), the condensed water outlet pipe (32) is located between the partition plate (31) and the water retaining plate (33), The two ends of the plurality of disc shell reinforcing columns (40) are respectively welded to the two side plates of the disc shell (39); The disc (18) with heat transfer oil as the heat medium includes a disc shell (39), an inlet heat transfer oil pipe (34), an outlet heat transfer oil pipe (36), a disc shell reinforcement column (40), and the shaft tube (28) is also provided with a casing (35) inside, and each of the heat-conducting oil pipes (34) connects the disc (18) with the shaft pipe (28), and each of the heat-conducting oil pipes (36) connects the The disc (18) communicates with the casing (35), and the two ends of the plurality of disc shell reinforcement columns (40) are respectively welded to the two side plates of the disc shell (39); The inlet and outlet heat medium device (6) using steam as the heat medium includes a rotary joint (37) and a siphon device (38), and the rotary joint (37) communicates with the shaft pipe (28) through the siphon device (38), so One end of the siphon device (38) is inserted into the bottom of the shaft tube (28), and one end is inserted into the rotary joint (37) and communicated with the rotary joint (37); The heat medium inlet and outlet device (6) using heat conduction oil as the heat medium includes a rotary joint (37), the rotary joint (37) communicates with the shaft tube (28), and the rotary joint (37) is single-channel or double-channel formula, the shaft tube (28) and casing (35) are changed accordingly. 5. A disc drying machine according to claim 1, characterized in that, the shell jacket (23) is a closed space provided with an inlet and outlet, including an outer shell (22), a pull tube ( 21), the heat medium inlet (20) and the heat medium outlet (26); the pull pipe (21) is fixedly connected with the outer wall of the housing (19) and the outer wall of the outer shell (22) respectively, and the heat medium inlet (20) And the heat medium outlet (26) communicates with the corresponding inlet and outlet heat medium device (6) respectively. 6. A disc dryer according to claim 5, characterized in that, when the heat medium is steam, the heat medium inlet (20) and the heat medium outlet (26) are respectively arranged on the shell jacket (23 ) of the highest point and the lowest point; when the heat medium is heat transfer oil medium, the heat medium inlet (20) and the heat medium outlet (26) are respectively arranged at the lowest point and the highest point of the shell jacket (23). 7. A disc dryer according to claim 1, characterized in that, the container (1) is also provided with an overflow baffle (3), a sealing device (4), a bearing seat (5) , gear set (10), transmission device (11), the overflow baffle (3) is arranged on the outer side of the outermost disk (18) on the heat exchange shaft (2), and the sealing device (4) is arranged on each At the joint between the heat exchange shaft (2) and the container (1), the bearing seat (5) is arranged outside the sealing device (4) to support the heat exchange shaft (2), and the gear set (10) is arranged on the two heat exchange shafts (2) close to the transmission device (11), the transmission device (11) is driven by the chain (12) and the sprocket (13) or by one of the motor reducer (14) and the heat exchange shaft (2) Direct. 8. A disc drying machine according to claim 3 or 4, characterized in that a partition is arranged inside the shaft tube (28) and the shell jacket (23), and the shaft tube (28) and The shell jacket (23) is divided into two sections, one end is fed with a heat medium to dry the material, and the other end is fed with a refrigerant for cooling. 9. A disc dryer, characterized in that the heat exchange shaft (2) of the disc dryer according to any one of claims 1-8 is combined into a disc dryer with more than three axes. machine, all the heat exchange shafts (2) are arranged in parallel in the same plane, the heat exchange shafts (2) are driven by the motor reducer (14) and the two adjacent heat exchange shafts (2) rotate in opposite directions, so Several hollow discs (18) are arranged at intervals on the heat exchange shaft (2), and the discs (18) on the one heat exchange shaft (2) are connected with the discs (18) on the other heat exchange shaft (2). The discs (18) are arranged in a staggered interval; at least one flat scraper (25) and a pushing scraper (24) are fixed on the outer edge of the disc (18).