Multi-section type vacuum spiral drying machine capable of continuously drying and using method of multi-section type vacuum spiral drying machine

Abstract

The invention provides a multi-section vacuum spiral dryer capable of continuously drying and a using method, and belongs to the technical field of spiral dryers. Comprising a rack, the top of the rack is provided with a plurality of sections of spiral drying machines which are distributed in a staggered mode, each spiral drying machine comprises a shell, a spiral conveying shaft, a variable frequency motor and a vacuumizing opening used for pumping away air in the shell, each shell comprises a shell body and a clamping sleeve arranged in the shell body, and a heating flow channel is formed in each spiral conveying shaft; a semi-spiral blade provided with a heating assembly is arranged on the outer wall of the spiral conveying shaft and used for heating and drying materials while the materials are conveyed, and a vacuum feeding tank is arranged at the top of the star-shaped discharging valve and used for making the materials in a vacuum state during feeding. According to the spiral drying machine, materials can be continuously dried, the heating area of the materials in the spiral drying machine is greatly increased, the materials are in a vacuum state in the whole process of feeding, conveying, heating and discharging, and the drying efficiency is effectively improved.

Description

Technical Field

[0001] The invention provides a multi-stage vacuum spiral dryer capable of continuous drying and a use method thereof, belonging to the technical field of spiral dryers. Background Art

[0002] A dryer is a mechanical device that uses heat energy to reduce the moisture content of materials. It is used to dry materials. The dryer vaporizes the moisture in the material (generally refers to water or other volatile liquid components) by heating to obtain solid materials with a specified moisture content. For example, it can dehydrate and dry pharmaceutical intermediates, traditional Chinese medicine, sterile powder, food, chemical powder and other materials. The purpose of drying is to meet the needs of further use or processing of the material. Among them, the spiral dryer has the characteristics of simple and compact structure and relatively high heat utilization rate, so it is widely used in various industries.

[0003] The existing spiral dryers can basically meet the use needs, but during the drying process, the materials are often blocked by the spiral blades, the spiral conveying shaft, and the inner wall of the shell as the materials are transported forward with the spiral blades, which inevitably causes the heating area of ​​the materials to be relatively small, and the materials are not in a vacuum state during the entire process of feeding, conveying, heating, and discharging, which leads to relatively low drying efficiency. Based on this, the present invention provides a multi-stage vacuum spiral dryer capable of continuous drying and a method of use. Summary of the invention

[0004] In order to solve the problems existing in the background technology, the present invention provides a multi-stage vacuum spiral dryer and a method of use that can continuously dry materials, which can greatly increase the heating area of ​​the materials in the spiral dryer and make the materials in a vacuum state throughout the entire process of feeding, conveying, heating and discharging, thereby effectively improving the drying efficiency.

[0005] The present invention provides a multi-stage vacuum spiral dryer capable of continuous drying and a method for using the same. The technical scheme proposed is as follows: it comprises a frame, a plurality of staggered spiral dryers are arranged on the top of the frame for continuously drying materials, a star-shaped discharge valve is arranged at the inlet of the spiral dryer at the top for quantitatively conveying materials into the spiral dryer, the spiral dryer comprises an outer shell, a spiral conveying shaft arranged inside the outer shell, a variable frequency motor for driving the spiral conveying shaft to rotate, and a vacuum port for extracting air from the inner shell, the outer shell comprises a shell and a jacket arranged inside the shell, a heating flow channel is arranged inside the spiral conveying shaft, a semi-spiral leaf equipped with a heating component is arranged on the outer wall of the spiral conveying shaft for heating and drying the materials while conveying them, and a vacuum feeding tank is arranged on the top of the star-shaped discharge valve for making the materials in a vacuum state during feeding.

[0006] Furthermore, a spiral heating inlet and a spiral heating outlet connected to the heating channel are provided on one side of the spiral dryer. The spiral heating inlet and the spiral heating outlet are connected to an external hot steam generating device for conveying hot steam into the heating channel to dry the material.

[0007] Furthermore, a heating inlet connected to the jacket is provided on one side of the shell, and a heating outlet connected to the jacket is provided on the other side of the shell. The heating inlet and the heating outlet are connected to an external hot steam generating device for conveying hot steam into the jacket to dry the material.

[0008] Furthermore, a pneumatic feeding butterfly valve is provided on the top of the vacuum feeding tank to control whether to feed, and a storage tank for storing materials is provided on the top of the pneumatic feeding butterfly valve.

[0009] Furthermore, a pneumatic discharge butterfly valve is provided at the outlet of the spiral dryer at the bottom, and a vacuum discharge tank is provided at the bottom of the pneumatic discharge butterfly valve to keep the material in a vacuum state during discharge.

[0010] Furthermore, a feed port is provided on one side of the top of the spiral dryer, and a discharge port is provided on one side of the bottom of the spiral dryer away from the feed port, and the discharge port of the upper section of the spiral dryer is connected to the feed port of the lower section of the spiral dryer.

[0011] Furthermore, one end of the vacuum port is inserted into the interior of the shell, and the other end of the vacuum port is connected to an external vacuum pump, so that the spiral dryer is placed in a vacuum state to dry the material.

[0012] Furthermore, a method for using a multi-stage vacuum spiral dryer capable of continuous drying comprises the following steps:

[0013] S1: Open the pneumatic feed butterfly valve to transport the material to be dried stored in the storage tank to the vacuum feed tank, and then open the star-shaped discharge valve to quantitatively transport the material to the spiral dryer;

[0014] S2: Start the external vacuum pump to evacuate the inside of the shell through the vacuum port, so that the spiral dryer is in a vacuum state to dry the material;

[0015] S3: Start the external steam generating device to transport the hot steam to the jacket and the inside of the heating channel to dry the material, and start the heating component equipped on the semi-spiral blade to heat and dry the material while transporting it;

[0016] S4: A multi-stage staggered spiral dryer, where the variable frequency motor drives the spiral conveying shaft to rotate, and then drives the semi-spiral blades to rotate, which can transport the material;

[0017] S5: Open the pneumatic discharge butterfly valve, and the dried material is transported to the vacuum discharge tank, where the material can be discharged by vacuum.

[0018] The beneficial effects of the present invention are as follows: the present invention can continuously dry materials, greatly increase the heating area of ​​the materials in the spiral dryer, and make the materials in a vacuum state throughout the entire process of feeding, conveying, heating and discharging, thereby effectively improving the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the present invention Figure 1 .

[0020] Figure 2 A schematic diagram of the present invention Figure 2 .

[0021] Figure 3 A schematic diagram of the present invention Figure 3 .

[0022] 1. Frame; 2. Spiral dryer; 3. Star-shaped discharge valve; 4. Vacuum feed tank; 5. Pneumatic feed butterfly valve; 6. Storage tank; 7. Pneumatic discharge butterfly valve; 8. Vacuum discharge tank; 20. Shell; 200. Shell; 201. Jacket; 202. Heating inlet; 203. Heating outlet; 21. Spiral conveying shaft; 210. Heating flow channel; 2100. Spiral heating inlet; 2101. Spiral heating outlet; 211. Semi-spiral blade; 22. Frequency conversion motor; 23. Vacuum port; 24. Feed port; 25. Discharge port. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings.

[0024] According to the attached Figure 1 , 23: A multi-stage vacuum spiral dryer capable of continuous drying, comprising a frame 1, wherein a plurality of staggered spiral dryers 2 are arranged on the top of the frame 1, for continuously drying materials, wherein the spiral dryer 2 comprises a shell 20, a spiral conveying shaft 21 disposed inside the shell 20, a variable frequency motor 22 for driving the spiral conveying shaft 21 to rotate, and a vacuum port 23 for extracting air from the shell 20, a feed port 24 is arranged on one side of the top of the spiral dryer 2, and a discharge port 25 is arranged on the side of the bottom of the spiral dryer 2 away from the feed port 24, and the discharge port 25 of the upper spiral dryer 2 is connected to the discharge port 25 of the lower spiral dryer 2. The feed port 24 of the dryer 2 is connected, one end of the vacuum port 23 is inserted into the interior of the shell 20, and the other end of the vacuum port 23 is connected to an external vacuum pump, so that the spiral dryer 2 is in a vacuum state to dry the material. The multi-stage spiral dryers 2 are staggered and can be continuously heated and dried while serpentine conveying the material. By vacuuming each spiral dryer 2, starting the external vacuum pump, and vacuuming the interior of the shell 20 through the vacuum port 23, the spiral dryer 2 is in a vacuum state to dry the material, making full use of the space area, reducing the plane occupied area, and improving space utilization.

[0025] According to the attached Figure 1 As shown: the shell 20 includes a shell 200, a jacket 201 arranged inside the shell 200, a heating channel 210 is arranged inside the spiral conveying shaft 21, and a semi-spiral blade 211 equipped with a heating component is arranged on the outer wall of the spiral conveying shaft 21, which is used to heat and dry the material while conveying it, and a spiral heating inlet 2100 and a spiral heating outlet 2101 connected to the heating channel 210 are arranged on one side of the spiral dryer 2, and the spiral heating inlet 2100 and the spiral heating outlet 2101 are connected to the external hot steam generating device The shell 200 is connected to the heating channel 210 for conveying hot steam to dry the material. One side of the shell 200 is provided with a heating inlet 202 connected to the jacket 201, and the other side of the shell 200 is provided with a heating outlet 203 connected to the jacket 201. The heating inlet 202 and the heating outlet 203 are connected to the external hot steam generating device, and are used to convey hot steam to the inside of the jacket 201 to dry the material. By heating the material around it, the heating area of ​​the material in the spiral dryer 2 can be greatly increased, and the drying efficiency can be effectively improved.

[0026] According to the attached Figure 1 , 3As shown: a star-shaped discharge valve 3 is provided at the inlet of the spiral dryer 2 at the top, which is used for quantitatively conveying the material into the spiral dryer 2; a vacuum feed tank 4 is provided on the top of the star-shaped discharge valve 3, which is used for making the material in a vacuum state during feeding; a pneumatic feed butterfly valve 5 is provided on the top of the vacuum feed tank 4, which is used for controlling whether to feed; a storage tank 6 for storing the material is provided on the top of the pneumatic feed butterfly valve 5; a pneumatic discharge butterfly valve 7 is provided at the outlet of the spiral dryer 2 at the bottom; a vacuum discharge tank 8 is provided at the bottom of the pneumatic discharge butterfly valve 7, which is used for making the material in a vacuum state during discharging, so that the material is in a vacuum state during the feeding and discharging process.

[0027] As an optional embodiment, a specific method for using a multi-stage vacuum spiral dryer capable of continuous drying comprises the following steps:

[0028] S1: Open the pneumatic feed butterfly valve 5 to transport the material to be dried stored in the storage tank 6 to the vacuum feed tank 4, and then open the star-shaped discharge valve 3 to quantitatively transport the material to the spiral dryer 2;

[0029] S2: Start the external vacuum pump to evacuate the interior of the housing 20 through the vacuum port 23, so that the spiral dryer 2 is in a vacuum state to dry the material;

[0030] S3: Start the external steam generating device to transport hot steam to the jacket 201 and the heating channel 210 to dry the material, and start the heating component equipped on the semi-spiral blade 211 to heat and dry the material while transporting it;

[0031] S4: A spiral dryer 2 with multiple staggered sections, in which a variable frequency motor 22 drives the spiral conveying shaft 21 to rotate, thereby driving the semi-spiral blades 211 to rotate, and can convey materials. The speed of the variable frequency motor 22 is adjusted according to the use needs, thereby driving the speed of the spiral conveying shaft 21 to change, and the spiral speed can be adjusted. In the process of moving forward, the material continuously turns over, and each point through which the material passes can contact the heat source and always maintain full contact with the heating body. The material is quickly dried under vacuum, low pressure and low temperature conditions, so that the moisture in the material continuously absorbs heat and evaporates, thereby achieving the purpose of drying and dehydration. In the drying process, the drying time is adjusted by adjusting the speed of the spiral shaft, thereby achieving the purpose of controlling the drying moisture;

[0032] S5: Open the pneumatic discharge butterfly valve 7, and the dried material is transported to the vacuum discharge tank 8, and the material can be discharged by vacuum.

[0033] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0034] The present invention can continuously dry the material, greatly increase the heating area of ​​the material in the spiral dryer 2, and make the material in a real fast state during the whole process of feeding, conveying, heating and discharging, effectively improving the drying efficiency.

[0035] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A multi-stage vacuum spiral dryer capable of continuous drying, comprising a frame (1), characterized in that: The top of the frame (1) is provided with a plurality of staggeredly arranged spiral dryers (2) for continuously drying materials. The inlet of the spiral dryer (2) at the top is provided with a star-shaped discharge valve (3) for quantitatively conveying materials into the spiral dryer (2). The spiral dryer (2) comprises an outer shell (20), a spiral conveying shaft (21) disposed inside the outer shell (20), a variable frequency motor (22) for driving the spiral conveying shaft (21) to rotate, and a vacuum port (23) for extracting air from the inner part of the outer shell (20). The outer shell (20) comprises a shell (200) and a jacket (201) disposed inside the shell (200). A heating flow channel (210) is provided inside the spiral conveying shaft (21). A semi-spiral blade (211) equipped with a heating component is provided on the outer wall of the spiral conveying shaft (21) for heating and drying the materials while conveying them. A vacuum feeding tank (4) is provided on the top of the star-shaped discharge valve (3) for placing the materials in a vacuum state during feeding.

2. A multi-stage vacuum spiral dryer capable of continuous drying according to claim 1, characterized in that: A spiral heating inlet (2100) and a spiral heating outlet (2101) which are connected to the heating channel (210) are provided on one side of the spiral dryer (2); the spiral heating inlet (2100) and the spiral heating outlet (2101) are connected to an external hot steam generating device and are used to transport hot steam into the heating channel (210) to dry the material.

3. The multi-stage vacuum spiral dryer capable of continuous drying according to claim 1, characterized in that: A heating inlet (202) connected to the jacket (201) is provided on one side of the shell (200), and a heating outlet (203) connected to the jacket (201) is provided on the other side of the shell (200). The heating inlet (202) and the heating outlet (203) are connected to an external hot steam generating device and are used to transport hot steam to the inside of the jacket (201) to dry the material.

4. The multi-stage vacuum spiral dryer capable of continuous drying according to claim 1, characterized in that: A pneumatic feeding butterfly valve (5) is provided on the top of the vacuum feeding tank (4) for controlling whether to feed, and a storage tank (6) for storing materials is provided on the top of the pneumatic feeding butterfly valve (5).

5. The multi-stage vacuum spiral dryer capable of continuous drying according to claim 1, characterized in that: The outlet of the spiral dryer (2) at the bottom is provided with a pneumatic discharge butterfly valve (7), and a vacuum discharge tank (8) is provided at the bottom of the pneumatic discharge butterfly valve (7) for making the material in a vacuum state when discharging.

6. The multi-stage vacuum spiral dryer capable of continuous drying according to claim 1, characterized in that: A feed inlet (24) is provided on one side of the top of the spiral dryer (2), and a discharge outlet (25) is provided on one side of the bottom of the spiral dryer (2) away from the feed inlet (24), and the discharge outlet (25) of the upper section of the spiral dryer (2) is connected to the feed inlet (24) of the lower section of the spiral dryer (2).

7. The multi-stage vacuum spiral dryer capable of continuous drying according to claim 1, characterized in that: One end of the vacuum port (23) is inserted into the interior of the housing (20), and the other end of the vacuum port (23) is connected to an external vacuum pump, so that the spiral dryer (2) is placed in a vacuum state to dry the material.

8. A multi-stage vacuum spiral dryer capable of continuous drying according to any one of claims 1 to 7, wherein the method of using the multi-stage vacuum spiral dryer comprises the following steps: S1: Open the pneumatic feed butterfly valve (5) to transport the material to be dried stored in the storage tank (6) to the vacuum feed tank (4), and then open the star-shaped discharge valve (3) to quantitatively transport the material to the spiral dryer (2); S2: starting an external vacuum pump to evacuate the interior of the housing (20) through the vacuum port (23), so that the spiral dryer (2) is in a vacuum state to dry the material; S3: starting the external steam generating device to transport hot steam to the jacket (201) and the interior of the heating channel (210) to dry the material, and starting the heating component equipped on the semi-spiral blade (211) to heat and dry the material while transporting it; S4: a spiral dryer (2) with multiple staggered sections, in which a variable frequency motor 22 drives the spiral conveying shaft (21) to rotate, thereby driving the semi-spiral blades (211) to rotate, so as to convey the material; S5: Open the pneumatic discharge butterfly valve (7), and the dried material is transported to the vacuum discharge tank (8), where the material can be discharged by vacuum.

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