Drying device for traditional Chinese medicine preparation and using method thereof

Abstract

The invention discloses a drying device for traditional Chinese medicine preparation and a using method thereof, and relates to the field of traditional Chinese medicine preparation. A drying device for traditional Chinese medicine preparation comprises a base plate and further comprises supporting rings symmetrically and fixedly connected to the base plate. The drying cylinder is rotationally connected to the supporting ring; according to the traditional Chinese medicinal material drying device, traditional Chinese medicinal materials in the drying cylinder are continuously turned over and thrown up, then all parts of the traditional Chinese medicinal materials can make full contact with hot air, the drying efficiency and uniformity are improved, hot and humid air flows back into the drying cylinder after being dried, heat recycling can be achieved, and the energy consumption is reduced. Therefore, extra energy input needed for maintaining the drying temperature is reduced, energy consumption is reduced, backflow hot air can continuously provide heat needed for drying the traditional Chinese medicinal materials, evaporation of moisture in the traditional Chinese medicinal materials is accelerated, due to flowing of the hot air, the diffusion speed of the moisture on the surfaces of the traditional Chinese medicinal materials is increased, and the drying effect is improved. And the drying efficiency is further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of traditional Chinese medicine preparation, and in particular relates to a drying device for traditional Chinese medicine preparation and a use method thereof. Background Art

[0002] As a treasure of traditional Chinese medicine, every link in the preparation process of Chinese medicine has a crucial impact on the quality and efficacy of the final medicine. Drying is one of the key steps in the preparation process of Chinese medicine. Its main purpose is to remove excess moisture in the Chinese medicine to prevent the Chinese medicine from mildew, rot and other deterioration during storage and transportation, while maintaining the stability and activity of the effective ingredients in the Chinese medicine.

[0003] At present, the most commonly used method is to use electric heating to dry Chinese medicinal materials. This method has a good drying effect. However, the existing drying devices are mostly static drying during the drying process, which makes the medicinal materials easily heated unevenly, reducing the drying effect and efficiency. In view of this, the present invention is specially proposed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a drying device for preparing traditional Chinese medicine and a method of using the same which can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0006] A drying device for preparing traditional Chinese medicine comprises a base plate, and also comprises: a support ring symmetrically fixedly connected to the base plate; a drying cylinder rotatably connected to the support ring, a plurality of paddle plates 1 equidistantly fixedly connected to the inner wall of the drying cylinder; a cover plate detachably connected to the drying cylinder; a rotating shaft rotatably connected to the support ring and passing through the drying cylinder; a plurality of paddle plates 2 are provided, the plurality of groups of paddle plates 2 are equidistantly fixedly connected to the rotating shaft, and each group of paddle plates 2 is equidistantly provided with a plurality of paddle plates 2 circumferentially.

[0007] In order to drive the drying drum to rotate, preferably, the support ring is rotatably connected to a rotating shaft, the rotating shaft is fixedly connected to a gear, the drying drum is fixedly connected to a gear ring, the gear ring is meshingly connected to the gear, a motor is fixedly mounted on the support ring, and the rotating shaft is fixedly connected to the output end of the motor.

[0008] In order to drive the rotating shaft to rotate synchronously with the rotating shaft, further, the rotating shaft and the rotating shaft are both fixedly connected with pulleys, and the two pulleys are connected by a belt.

[0009] In order to heat the gas passing through the heating box, further, the base plate is fixedly connected with a piston cylinder and a heating box, a piston disk is slidably connected in the piston cylinder, a piston rod is rotatably connected to the piston disk, a crankshaft is fixedly connected to the rotating shaft, the crankshaft is rotatably connected to the piston rod, conduit one and conduit two are fixedly connected to the piston cylinder, the piston cylinder is connected to the heating box through conduit two, a hollow cavity is opened on the rotating shaft, an air jet hole connected to the hollow cavity is opened on the rotating shaft, an air supply pipe is fixedly connected to the heating box, the air supply pipe is connected to the hollow cavity through a rotating joint, and the rotating joint is arranged on the rotating shaft.

[0010] In order to enhance the heating effect of the gas passing through the heating box, further, a plurality of partitions are staggered and fixedly connected to the inner walls on both sides of the heating box, a heating cavity is formed between two adjacent partitions, and electric heating wires are fixedly installed on the partitions.

[0011] In order to be able to dry the high-temperature hot air passing through the dehumidification box, further, the dehumidification box is fixedly connected to the base plate, and a desiccant layer and an activated carbon filter element plate are arranged in the dehumidification box. The piston cylinder is connected to the dehumidification box through a conduit 1, and an air suction chamber connected to the drying cylinder is opened on the cover plate. The dehumidification box is fixedly connected with a pipe, and the pipe is connected to the air suction chamber through a rotary joint, and the rotary joint is arranged on the cover plate.

[0012] Furthermore, the desiccant layer and the activated carbon filter plate are both inserted into the dehumidification box.

[0013] In order to facilitate the disassembly and assembly of the cover plate, preferably, it further comprises a plurality of fixing bolts, and the cover plate is detachably connected to the drying drum via the plurality of fixing bolts.

[0014] In order to increase the sealing performance of the connection between the cover plate and the drying cylinder, further, a sealing ring is provided on the cover plate, and the sealing ring is in contact with the inner wall of the drying cylinder.

[0015] A method for using a drying device for preparing traditional Chinese medicine comprises the following steps:

[0016] Step 1: When drying the Chinese medicinal materials, first pour the Chinese medicinal materials to be dried into the drying drum, and then transport hot air to the drying drum to heat the Chinese medicinal materials;

[0017] Step 2: When the drying drum rotates, the Chinese medicinal materials are constantly turned inside the drying drum and fully contacted with the hot air;

[0018] Step 3: The drying drum drives the paddle plate 1 to rotate, so that when the paddle plate 1 rotates, the Chinese medicinal materials in the drying drum are continuously turned over and thrown up, so that each part of the Chinese medicinal materials can fully contact with the hot air;

[0019] Step 4: The second paddle is driven to rotate by the rotating shaft, so that the Chinese medicinal materials are turned over better in the drying drum under the paddle movement of the second paddle, thereby making the Chinese medicinal materials more evenly heated and dried in the drying drum;

[0020] Step 5. After drying is completed, take the dried Chinese medicinal materials out of the drying drum.

[0021] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0022] The present invention improves the drying efficiency and uniformity by continuously turning and throwing up the Chinese medicinal materials in the drying drum so that each part of the Chinese medicinal materials can fully contact with the hot air. It also realizes heat recovery by returning the moist hot air into the drying drum after drying, thereby reducing the additional energy input required to maintain the drying temperature, thereby reducing energy consumption. The returning hot air can continuously provide the Chinese medicinal materials with the heat required for drying, accelerate the evaporation of water in the Chinese medicinal materials, and due to the flow of hot air, the diffusion rate of water on the surface of the Chinese medicinal materials is accelerated, further improving the drying efficiency.

[0023] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In the attached picture:

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 It is a front view of the present invention;

[0027] Figure 3 It is a schematic diagram of the internal structure of the heating box of the present invention;

[0028] Figure 4 It is a schematic diagram of the internal structure of the dehumidification box of the present invention;

[0029] Figure 5 It is a schematic diagram of the internal structure of the piston cylinder of the present invention;

[0030] Figure 6 The present invention Figure 1 Enlarged view of part A.

[0031] In the figure: 1. base plate; 101. support ring; 2. drying cylinder; 201. cover plate; 202. fixing bolt; 203. sealing ring; 204. paddle plate 1; 3. motor; 301. rotating shaft; 302. gear; 303. gear ring; 4. rotating shaft; 401. paddle plate 2; 402. belt; 5. piston cylinder; 501. piston rod; 502. piston disc; 503. conduit 1; 504. conduit 2; 505. crankshaft; 6. heating box; 601. partition; 602. electric heating wire; 603. gas pipe; 604. hollow cavity; 605. jet hole; 7. dehumidification box; 701. desiccant layer; 702. activated carbon filter element plate; 703. pipeline; 704. suction cavity. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0033] Embodiment 1:

[0034] Reference Figure 1 , Figure 2 A drying device for preparing traditional Chinese medicine includes a base plate 1, and also includes: a support ring 101 symmetrically fixedly connected to the base plate 1; a drying cylinder 2, rotatably connected to the support ring 101, and a plurality of paddle plates 204, equidistantly fixedly connected to the inner wall of the drying cylinder 2; a cover plate 201, detachably connected to the drying cylinder 2; a rotating shaft 4, rotatably connected to the support ring 101, and passing through the drying cylinder 2; a plurality of paddle plates 401 are provided, and the plurality of paddle plates 401 are equidistantly fixedly connected to the rotating shaft 4, and each group of paddle plates 401 is equidistantly provided with a plurality of paddle plates 401.

[0035] A rotating shaft 301 is rotatably connected to the support ring 101, a gear 302 is fixedly connected to the rotating shaft 301, a gear ring 303 is fixedly connected to the drying cylinder 2, the gear ring 303 is meshed with the gear 302, a motor 3 is fixedly installed on the support ring 101, and the rotating shaft 301 is fixedly connected to the output end of the motor 3.

[0036] The rotating shaft 4 and the rotation shaft 301 are both fixedly connected with pulleys, and the two pulleys are connected by a belt 402 .

[0037] It also includes a plurality of fixing bolts 202 , through which the cover plate 201 is detachably connected to the drying drum 2 .

[0038] When drying Chinese medicinal materials, first pour the Chinese medicinal materials to be dried into the drying drum 2, then cover the cover plate 201 for closing the drying drum 2, and then install the fixing bolts 202 for limiting and fixing the cover plate 201, so as to improve the stability of the cover plate 201 covered on the drying drum 2.

[0039] When the Chinese medicinal materials are heated and dried, the motor 3 is started, and the motor 3 drives the rotating shaft 301 to rotate. When the rotating shaft 301 rotates, the gear 302 is meshed with the gear ring 303 to drive the drying drum 2 to rotate. When the drying drum 2 rotates, the Chinese medicinal materials are constantly turned over in the drying drum 2 and fully contacted with the hot air, thereby improving the drying efficiency. At the same time, the drying drum 2 drives the paddle 1 204 to rotate, so that when the paddle 1 204 rotates, the Chinese medicinal materials in the drying drum 2 are constantly turned over and thrown up, thereby making all parts of the Chinese medicinal materials fully contact with the hot air, thereby improving the drying efficiency and uniformity. At the same time, the rotating shaft 301 drives the rotating shaft 4 to rotate through the belt 402, and the rotating shaft 4 drives the paddle 2 401 to rotate, so that the Chinese medicinal materials are better turned over in the drying drum 2 under the paddle 2 401, thereby making the Chinese medicinal materials more evenly heated and dried in the drying drum 2, avoiding local overheating or insufficient drying, thereby ensuring the consistency of product quality.

[0040] Embodiment 2:

[0041] Reference Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , a drying device for preparing traditional Chinese medicine, which is basically the same as Example 1, and further, a piston cylinder 5 and a heating box 6 are fixedly connected to the substrate 1, a piston disk 502 is slidably connected in the piston cylinder 5, a piston rod 501 is rotatably connected to the piston disk 502, a crankshaft 505 is fixedly connected to the rotating shaft 301, the crankshaft 505 is rotatably connected to the piston rod 501, a conduit 1 503 and a conduit 2 504 are fixedly connected to the piston cylinder 5, the piston cylinder 5 is connected to the heating box 6 through the conduit 2 504, a hollow cavity 604 is opened on the rotating shaft 4, an air jet hole 605 connected to the hollow cavity 604 is opened on the rotating shaft 4, an air supply pipe 603 is fixedly connected to the heating box 6, the air supply pipe 603 is connected to the hollow cavity 604 through a rotary joint, and the rotary joint is arranged on the rotating shaft 4.

[0042] A plurality of partitions 601 are staggered and fixedly connected to the inner walls of both sides of the heating box 6 , a heating chamber is formed between two adjacent partitions 601 , and an electric heating wire 602 is fixedly installed on the partition 601 .

[0043] A dehumidification box 7 is fixedly connected to the base plate 1, and a desiccant layer 701 and an activated carbon filter plate 702 are arranged in the dehumidification box 7. The piston cylinder 5 is connected to the dehumidification box 7 through a conduit 1 503. An air suction chamber 704 connected to the drying cylinder 2 is opened on the cover plate 201. A pipe 703 is fixedly connected to the dehumidification box 7. The pipe 703 is connected to the air suction chamber 704 through a rotary joint, and the rotary joint is arranged on the cover plate 201.

[0044] Heating method of drying drum 2:

[0045] The rotating shaft 301 during the rotation process drives the crankshaft 505 to rotate, and the crankshaft 505 drives the piston plate 502 to slide up and down in the piston cylinder 5 through the piston rod 501, thereby forming a piston movement. Therefore, when the piston plate 502 slides upward in the piston cylinder 5, external gas is sucked into the piston cylinder 5 through the conduit 1 503, and when the piston plate 502 slides downward in the piston cylinder 5, the gas is squeezed by the piston plate 502 and discharged from the piston cylinder 5 through the conduit 2 504, and is transported to the heating box 6 through the conduit 2 504 for heating. Both the conduit 1 503 and the conduit 2 504 are provided with a one-way valve, and then the heated gas is transported into the hollow cavity 604 through the gas pipe 603, and finally sprayed into the drying cylinder 2 through the jet hole 605, so that it heats and dries the Chinese medicinal materials in the drying cylinder 2;

[0046] At the same time, when the gas passes through the heating box 6, the gas is heated by the electric heating wire 602. At the same time, a plurality of partitions 601 are staggered on the inner walls of both sides of the heating box 6, so that the time for the gas to pass through the heating box 6 can be extended, thereby helping the electric heating wire 602 to fully heat the gas passing through the heating box 6;

[0047] When the Chinese medicinal materials are heated and dried by blowing hot air into the drying cylinder 2, the hot air is converted into moist hot air after absorbing the moisture of the Chinese medicinal materials. The moist hot air contains a large amount of heat absorbed during the drying process. When the piston disc 502 slides upward in the piston cylinder 5, the suction chamber 704 generates a negative pressure, thereby sucking the hot air in the drying cylinder 2 into the suction chamber 704, and then transporting it into the dehumidification box 7 through the pipeline 703. A one-way valve is provided on the pipeline 703. When the moist hot air passes through the dehumidification box 7, it first contacts the desiccant layer 701. Since the desiccant raw materials include silica gel, quicklime, minerals, montmorillonite, calcium chloride, molecular sieves, alumina, fiber, biochemical, etc., and the desiccant layer 701 in the present invention uses silica gel desiccant (transparent round beads), since silica gel desiccant is an environmentally friendly, non-toxic and moisture-proof product, When the hot and humid air contacts with the silica gel desiccant, the silica gel desiccant can absorb the moisture in the hot and humid air, thereby playing the role of drying the gas. Then, the hot and humid air after being dried once contacts with the activated carbon filter element plate 702 again. Since the activated carbon has a developed gap structure and rich microporous tissue inside, it can absorb the moisture in the steam into the micropores when the steam contacts with the activated carbon, so that it can dry the hot air again, thereby improving the drying effect of the hot and humid air. Then, the dried gas enters the piston cylinder 5 through the conduit 1 503, and then when the piston disc 502 slides downward in the piston cylinder 5, the gas is squeezed by the piston disc 502 and transported into the heating box 6 through the conduit 2 504, and then transported into the hollow cavity 604 through the gas pipe 603, and finally sprayed into the drying cylinder 2 through the jet hole 605 to form a cycle;

[0048] In summary, since the hot and humid air contains a large amount of heat absorbed during the drying process, the heat can be recycled by drying the hot and humid air and returning it to the drying drum 2, thereby reducing the additional energy input required to maintain the drying temperature, thereby reducing energy consumption;

[0049] The refluxed hot air can continuously provide the heat required for drying the Chinese medicinal materials, accelerate the evaporation of water in the Chinese medicinal materials, and due to the flow of hot air, the diffusion speed of moisture on the surface of the Chinese medicinal materials is accelerated, further improving the drying efficiency;

[0050] After the refluxed hot and humid air is dried, its humidity is reduced and its temperature is relatively stable, which helps to maintain the stability of the drying environment in the drying cylinder 2, so that the Chinese medicinal materials can always be in relatively dry conditions throughout the drying process, further improving the drying efficiency.

[0051] It should be noted that as the temperature continues to rise, the air pressure inside the drying cylinder 2 will gradually increase. Therefore, in order to prevent the pressure inside the drying cylinder 2 from being too high and causing safety hazards, a pressure relief pipe connected to the drying cylinder 2 may be provided on the cover plate 201, and a pressure relief valve (not shown in the figure) is provided on the pressure relief pipe. When the air pressure inside the drying cylinder 2 is greater than the pressure relief value set by the pressure relief valve on the pressure relief pipe, the pressure relief valve automatically opens to relieve the pressure, thereby keeping the pressure inside the drying cylinder 2 constant.

[0052] Embodiment 3:

[0053] Reference Figure 2 , Figure 4 , a drying device for preparing traditional Chinese medicine, which is basically the same as Example 1, and further, the desiccant layer 701 and the activated carbon filter plate 702 are both plugged into the dehumidification box 7;

[0054] By connecting the desiccant layer 701 and the activated carbon filter element plate 702 to the dehumidification box 7 in a manner that allows insertion and removal, the dehumidification box has the following advantages:

[0055] Convenient installation and disassembly: when the desiccant layer 701 and the activated carbon filter core plate 702 need to be replaced, the old desiccant layer 701 and the activated carbon filter core plate 702 can be easily pulled out from the dehumidification box 7, and then the new desiccant layer 701 and the activated carbon filter core plate 702 can be inserted, so that the maintenance and replacement of the desiccant layer 701 and the activated carbon filter core plate 702 become more convenient, and no complicated tools and operations are required;

[0056] High flexibility: According to different usage requirements, desiccant layers 701 and activated carbon filter plates 702 of different specifications, materials or filtering performances can be selected for plugging in, so as to adjust the dehumidification performance of the dehumidification box 7 to meet different work requirements.

[0057] Embodiment 4:

[0058] Reference Figure 1 , a drying device for preparing traditional Chinese medicine, which is basically the same as that of Example 1, and further, a sealing ring 203 is provided on the cover plate 201, and the sealing ring 203 is in contact with the inner wall of the drying cylinder 2;

[0059] When the Chinese medicinal materials are heated and dried, the sealing ring 203 is squeezed by the cover plate 201 to fit tightly against the inner wall of the drying cylinder 2, thereby increasing the sealing of the connection between the cover plate 201 and the drying cylinder 2 and preventing heat from being lost through the gap between the cover plate 201 and the drying cylinder 2, so that the drying cylinder 2 can reach the required drying temperature in a shorter time, and the sufficient internal heat can accelerate the evaporation of water in the Chinese medicinal materials, thereby increasing the drying speed.

[0060] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, they are not intended to limit the present invention.

Claims

1. A drying device for preparing traditional Chinese medicine, comprising a substrate (1), characterized in that: Also includes: A support ring (101) symmetrically fixedly connected to the base plate (1); The drying cylinder (2) is rotatably connected to the support ring (101). A plurality of shifting plates (204) are fixedly connected to the inner wall of the drying cylinder (2) at equal intervals; A cover plate (201) which is detachably connected to the drying cylinder (2); A rotating shaft (4) rotatably connected to the support ring (101) and passing through the drying cylinder (2); The second shifting plate (401) is provided with multiple groups, and the multiple groups of the second shifting plates (401) are fixedly connected to the rotating shaft (4) at equal intervals, and each group of the second shifting plates (401) is provided with multiple groups at equal intervals on the circumference.

2. A drying device for preparing traditional Chinese medicine according to claim 1, characterized in that: The support ring (101) is rotatably connected to a rotating shaft (301), the rotating shaft (301) is fixedly connected to a gear (302), the drying cylinder (2) is fixedly connected to a gear ring (303), the gear ring (303) is meshingly connected to the gear (302), a motor (3) is fixedly mounted on the support ring (101), and the rotating shaft (301) is fixedly connected to an output end of the motor (3).

3. A drying device for preparing traditional Chinese medicine according to claim 2, characterized in that: The rotating shaft (4) and the rotary shaft (301) are both fixedly connected with pulleys, and the two pulleys are connected via a belt (402).

4. A drying device for preparing traditional Chinese medicine according to claim 2, characterized in that: The base plate (1) is fixedly connected to a piston cylinder (5) and a heating box (6); a piston disk (502) is slidably connected inside the piston cylinder (5); a piston rod (501) is rotatably connected to the piston disk (502); a crankshaft (505) is fixedly connected to the rotating shaft (301); the crankshaft (505) is rotatably connected to the piston rod (501); a conduit 1 (503) and a conduit 2 (504) are fixedly connected to the piston cylinder (5); the piston cylinder (5) is connected to the heating box (6) via the conduit 2 (504); a hollow cavity (604) is provided on the rotating shaft (4); an air jet hole (605) connected to the hollow cavity (604) is provided on the rotating shaft (4); an air supply pipe (603) is fixedly connected to the heating box (6); the air supply pipe (603) is connected to the hollow cavity (604) via a rotating joint; the rotating joint is arranged on the rotating shaft (4).

5. A drying device for preparing traditional Chinese medicine according to claim 4, characterized in that: The inner walls of both sides of the heating box (6) are staggered and fixedly connected with a plurality of partitions (601), a heating chamber is formed between two adjacent partitions (601), and an electric heating wire (602) is fixedly installed on the partition (601).

6. A drying device for preparing traditional Chinese medicine according to claim 5, characterized in that: A dehumidification box (7) is fixedly connected to the base plate (1), and a desiccant layer (701) and an activated carbon filter plate (702) are arranged in the dehumidification box (7). The piston cylinder (5) is connected to the dehumidification box (7) through a conduit 1 (503). An air suction chamber (704) connected to the drying cylinder (2) is provided on the cover plate (201). A pipe (703) is fixedly connected to the dehumidification box (7), and the pipe (703) is connected to the air suction chamber (704) through a rotary joint. The rotary joint is arranged on the cover plate (201).

7. A drying device for preparing traditional Chinese medicine according to claim 6, characterized in that: The desiccant layer (701) and the activated carbon filter plate (702) are both inserted into the dehumidification box (7).

8. A drying device for preparing traditional Chinese medicine according to claim 1, characterized in that: It also comprises a plurality of fixing bolts (202), and the cover plate (201) is detachably connected to the drying cylinder (2) via the plurality of fixing bolts (202).

9. A drying device for preparing traditional Chinese medicine according to claim 8, characterized in that: The cover plate (201) is provided with a sealing ring (203), and the sealing ring (203) is in contact with the inner wall of the drying cylinder (2).

10. A method for using a drying device for preparing traditional Chinese medicine, using the drying device for preparing traditional Chinese medicine according to claim 1, characterized in that: The following steps are included: Step 1: When drying the Chinese medicinal materials, first pour the Chinese medicinal materials to be dried into the drying drum (2), and then transport hot air to the drying drum (2) to heat the Chinese medicinal materials; Step 2: When the drying drum (2) rotates, the Chinese medicinal materials are constantly turned inside the drying drum (2) so as to be fully exposed to the hot air; Step 3: driving the paddle plate 1 (204) to rotate by the drying cylinder (2), so that the paddle plate 1 (204) rotates, causing the Chinese medicinal materials in the drying cylinder (2) to be continuously turned over and thrown up, thereby allowing all parts of the Chinese medicinal materials to fully contact with the hot air; Step 4: driving the second paddle plate (401) to rotate by the rotating shaft (4), so that the Chinese medicinal materials are better turned in the drying cylinder (2) under the paddle plate (401), thereby making the Chinese medicinal materials more evenly heated and dried in the drying cylinder (2); Step 5: After the drying is completed, the dried Chinese medicinal materials are taken out of the drying drum (2).

Images