A two-stage vertical drying apparatus, system and method

Abstract

The application discloses a double-stage vertical drying device, system and method, and the device comprises an A-stage vertical dryer and a B-stage vertical dryer, the A-stage vertical dryer is used for drying large-moisture material or large-moisture material containing volatile components, and the B-stage vertical dryer is used for drying medium-moisture material or medium-moisture material containing volatile components. The A-stage vertical dryer and the B-stage vertical dryer are respectively provided with a feeding port, a discharging port, an air inlet, an air outlet, a scattering plate and a wind guide plate, and the discharging port of the A-stage vertical dryer and the B-stage vertical dryer is respectively provided with a multi-stage flip lock air valve, and the discharging port of the A-stage vertical dryer is communicated with the B-stage vertical dryer. The drying path is long, and the device is suitable for drying large-moisture material or large-moisture material containing volatile components; the air volume and the air temperature of the A-stage vertical dryer and the B-stage vertical dryer are separately controlled, the drying effect of the large-moisture material is ensured, and the unreasonable gas temperature is avoided to cause volatile loss and safety hazards; the device is flexible to operate and low in energy consumption.

Description

Technical Field

[0001] This invention relates to the field of industrial drying equipment technology, and in particular to a two-stage vertical drying equipment, system and method. Background Technology

[0002] Traditional material drying is achieved using rotary dryers. In an inclined rotary dryer, the drum rotates via a transmission device. Material enters the dryer from the upper end, and the system where hot gas and material enter from the same end is called a co-current dryer (see attached diagram). Figure 3 As shown in the attached diagram, a counter-current dryer is one where hot gas and material enter the dryer from opposite ends of the drum. Figure 4 As shown, the material is lifted by the lifting plate to achieve heat exchange between the wet material and the hot gas. The moisture in the material is carried out of the system by the hot gas, and the moisture content of the wet material is greatly reduced after heat exchange, thus achieving the purpose of drying.

[0003] Rotary dryers have the following disadvantages: low heat exchange efficiency and large heat loss during drying; the hollow internal structure of the rotary dryer causes short circuits in high-temperature hot gases, posing a safety hazard to subsequent dust collection equipment; large equipment size and large footprint; high power of the rotary drive motor, increasing the power consumption of the drying system; low drying thermal efficiency due to material dispersion via lifting plates; limited means of adjusting drying gas temperature and airflow, resulting in poor adaptability to fluctuations in material moisture content; severe and uneven wear of the lifting plates when drying highly abrasive materials; and extremely high civil engineering costs due to the fully enclosed plant.

[0004] The applicant previously proposed a material drying equipment and system to address the above problems. However, the material's path length within the equipment is limited, making it unsuitable for drying materials with extremely high moisture content. When drying such materials, simply increasing the equipment size results in the material's descent speed gradually accelerating due to gravity, leading to poor heat exchange. Furthermore, the internal temperature of the hot gas in the dryer cannot be controlled, causing a mismatch between the material's gradually increasing moisture content and the dryer's gas temperature. For materials with high moisture content containing volatiles, strict control of the drying air temperature is required, and this system cannot adapt to the needs of low-temperature, slow-drying production. Summary of the Invention

[0005] Purpose of the invention: The first purpose of this invention is to provide a high-efficiency two-stage vertical drying device; the second purpose is to provide a material drying system using the device; and the third purpose is to provide a material drying method using the system, so as to solve the above-mentioned technical problems.

[0006] Technical Solution: The dual-stage vertical drying equipment of the present invention includes an A-stage vertical dryer and a B-stage vertical dryer. The A-stage dryer includes a first V-shaped shell. A feed inlet is provided at the top center of the first V-shaped shell. A primary air inlet is provided on one side of the feed inlet and a primary air outlet is provided on the other side. Several first dispersing plates are provided at the bottom of the feed inlet near the air inlet, and several first air distribution guide plates are provided on the side near the air outlet in a stepped, inclined arrangement from top to bottom. A first discharge port is provided at the bottom of the first V-shaped shell. The first discharge port is connected to the second V-shaped shell of the B-stage vertical dryer and serves as the feed inlet of the B-stage vertical dryer. A first multi-stage flap airlock valve is provided inside the first discharge port. A secondary air inlet is provided at the bottom of the first V-shaped shell.

[0007] Furthermore, a feeder is provided inside the feed inlet.

[0008] Furthermore, the first V-shaped shell adopts a variable cross-section cavity structure.

[0009] Furthermore, the second V-shaped shell of the B-stage vertical dryer has a tertiary air inlet on one side of the bottom of the feed inlet and a secondary air outlet on the other side. The bottom of the feed inlet has several second dispersing plates on one side of the tertiary air inlet and several second air distribution guide plates on one side near the secondary air outlet. The bottom of the second V-shaped shell has a second discharge outlet.

[0010] Furthermore, the bottom of the second V-shaped housing is provided with four air inlets, and the second discharge port is provided with a second multi-stage flap airlock valve.

[0011] Furthermore, the tilt angle of the second dispersing plate is smaller than that of the first dispersing plate, and the angle is adjustable.

[0012] Furthermore, the primary air inlet is equipped with a first air volume regulating valve, the secondary air inlet is equipped with a second air volume regulating valve, the tertiary air inlet is equipped with a third air volume regulating valve, and the quaternary air inlet is equipped with a fourth air volume regulating valve.

[0013] A drying system for a two-stage vertical drying device, using the aforementioned two-stage vertical drying device, wherein the primary air inlet is connected to an air inlet duct, the air inlet duct including a hot air duct and a first cold air duct, the hot air duct being equipped with a hot air control valve, the first cold air duct being equipped with a fifth airflow regulating valve, the hot air duct and the first cold air duct being connected; the secondary air inlet is connected to the primary air inlet; the primary air outlet is connected to one end of a dust collector; the tertiary air inlet is connected to the air inlet duct, the air inlet duct further including a second cold air duct, the second cold air duct being connected to the hot air duct. It is equipped with a sixth air volume regulating valve, and the fourth air inlet is connected to the third air inlet; the second air outlet merges with the first air outlet and is connected to one end of the dust collector, and the other end of the dust collector is connected to the system exhaust fan 16; a first temperature and pressure monitoring point is provided at the first air inlet, a second temperature and pressure monitoring point is provided at the connection between the air outlet and the dust collector, and a first material temperature monitoring point is provided at the bottom of the first discharge port; a third temperature and pressure monitoring point is provided at the third air inlet, a fourth temperature and pressure monitoring point is provided at the connection between the second air outlet and the dust collector, and a second material temperature monitoring point is provided at the bottom of the second discharge port.

[0014] A drying method using the above-described drying system includes the following steps:

[0015] S1: The wet material is forcibly dispersed through the distributor in the feed inlet and then fed into the first V-shaped shell of the A-stage dryer;

[0016] S2: When the drying air source is turned on, the hot airflow enters the first V-shaped housing through the primary air inlet and the secondary air inlet, and then enters the second V-shaped housing through the tertiary air inlet and the fourth air inlet.

[0017] S3: Adjust the system exhaust fan speed to regulate the total amount of drying air;

[0018] S4: Adjust the temperature and pressure monitoring points to detect the air temperature, and adjust the air volume and air temperature of each air inlet by adjusting the opening of each air volume regulating valve and hot air control valve.

[0019] S5: Monitor the temperature at the material temperature monitoring point to evaluate the material drying effect;

[0020] S6: Dust in the exhaust gas after drying is collected by a bag dust collector, and the collected dust is used as the finished product.

[0021] Furthermore, the system includes a fault detection step. The pressure difference between the first and second temperature and pressure monitoring points is used to assess whether there is material blockage in the A-stage vertical dryer. If the pressure difference is ≥600Pa, it indicates potential material blockage in the A-stage vertical dryer, requiring inspection and troubleshooting. If the pressure difference is ≤200Pa, it indicates potential uneven material distribution or material breakage in the A-stage vertical dryer, requiring inspection and troubleshooting. Similarly, the pressure difference between the third and fourth temperature and pressure monitoring points is used to assess whether there is material blockage in the B-stage vertical dryer. If the pressure difference is ≥600Pa, it indicates potential material blockage in the B-stage vertical dryer, requiring inspection and troubleshooting. If the pressure difference is ≤200Pa, it indicates potential uneven material distribution or material breakage in the B-stage vertical dryer, requiring inspection and troubleshooting.

[0022] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages:

[0023] (1) Suitable for drying materials with high moisture content, with a dual-stage dryer of stage A and stage B, extending the drying path to ensure that the final moisture content of the dried material meets production requirements.

[0024] (2) The A-stage double-stage dryer mainly solves the primary drying of materials with high moisture content, while the B-stage double-stage dryer is responsible for the secondary drying of materials with medium moisture content from the A-stage. The air volume and air temperature of the A and B-stage dryers are controlled separately to avoid safety hazards caused by unreasonable material temperature, while ensuring that the final moisture content of the dried material meets the requirements.

[0025] (3) The A-stage double-stage dryer mainly solves the primary drying of materials with high moisture content and volatile content, while the B-stage double-stage dryer is responsible for the secondary drying of materials with medium moisture content and volatile content from the A-stage dryer. The air volume and air temperature of the A and B-stage dryers are controlled separately to avoid loss of volatile content and safety hazards caused by unreasonable material temperature, while ensuring that the final moisture content of the dried material meets the requirements.

[0026] (4) The system is simple, flexible in operation, safe and reliable, and has low energy consumption. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the drying system of the present invention;

[0028] Figure 2 This is a schematic diagram of the overall structure of the two-stage vertical drying equipment of the present invention;

[0029] Figure 3 This is a schematic diagram of the overall structure of a traditional co-current rotary dryer in the background technology;

[0030] Figure 4 This is a schematic diagram of the overall structure of a traditional countercurrent rotary dryer in the background technology. Detailed Implementation

[0031] The technical solution of the present invention will be further described below with reference to the embodiments.

[0032] Example 1

[0033] like Figure 2 As shown, the present invention provides a two-stage vertical drying device including an A-stage vertical dryer and a B-stage vertical dryer. The A-stage dryer includes a first V-shaped shell 1. A feed inlet 2 is located at the top center of the first V-shaped shell 1. A primary air inlet 3 is located on one side of the feed inlet 2, and a primary air outlet 4 is located on the other side. Several first dispersing plates 5 are located near the primary air inlet 3 at the bottom of the feed inlet 2 inside the first V-shaped shell 1. Several first air distribution guide plates 6 are arranged in a stepped, inclined manner from top to bottom near the primary air outlet 4. A first discharge outlet 7 is located at the bottom of the first V-shaped shell 1, which communicates with the second V-shaped shell 21 of the B-stage vertical dryer and serves as the feed inlet for the B-stage vertical dryer. A first multi-stage flap airlock valve 9 is located inside the first discharge outlet 7. A secondary air inlet 8 is located at the bottom of the first V-shaped shell 1. A material distributor 20 is located inside the feed inlet 2. The first V-shaped shell 1 adopts a variable cross-section cavity structure. In the second V-shaped shell 21 of the B-stage vertical dryer, a tertiary air inlet 23 is provided on one side of the bottom of the first discharge port 7, and a secondary air outlet 24 is provided on the other side. Several second dispersing plates 25 are provided on one side of the tertiary air inlet 23 at the bottom of the first discharge port 7, and several second air distribution guide plates 26 are provided on the side near the secondary air outlet 24. A second discharge port 27 is provided at the bottom of the second V-shaped shell 21. A fourth air inlet 28 is provided at the bottom of the second V-shaped shell 21, and a second multi-stage flap airlock valve 29 is provided inside the second discharge port 27. The inclination angle of the second dispersing plates 25 is smaller than that of the first dispersing plates 5. A first air volume regulating valve 10 is provided at the primary air inlet 3, and a second air volume regulating valve 11 is provided at the secondary air inlet 8. A third air volume regulating valve 30 is provided at the tertiary air inlet 23, and a fourth air volume regulating valve 31 is provided at the fourth air inlet 28.

[0034] During drying, the wet material is evenly dispersed along the width of the first dispersing plate 5 by the distributor 20 inside the A-stage feed inlet 2 of the V-shaped dryer before being fed into the first V-shaped shell 1. Hot air from the drying heat source enters the first V-shaped shell 1 through the primary air inlet 3 and the secondary air inlet 8. The airflow through the primary air inlet 3 is adjusted by the opening of the first airflow regulating valve 10. To increase the primary airflow, the opening of the first airflow regulating valve 10 is increased; to decrease the primary airflow, the opening of the first airflow regulating valve 10 is decreased. As the material falls, it passes through several first dispersing plates 5, undergoing thorough heat exchange with the high-temperature drying gas from the primary air inlet 3, gradually reducing its moisture content. During the falling process, the material again encounters, disperses, and exchanges heat with the hot gas from the secondary air inlet 8. The airflow through the secondary air inlet 8 is adjusted by the opening of the second airflow regulating valve 11. When it is necessary to increase the secondary air volume, the opening of the second air volume regulating valve 11 is increased; when it is necessary to reduce the secondary air volume, the opening of the second air volume regulating valve 11 is decreased. The material after the drying effect is consolidated is discharged through the first multi-stage flip-type air lock valve 9 and the first discharge port 7 into the second V-shaped shell 21 of the B-stage dryer.

[0035] Material from the A-stage dryer is evenly dispersed along the width of the second dispersing plate 25 through the first discharge port 7 and then fed into the second V-shaped shell 21. Hot air from the drying heat source enters the second V-shaped shell 21 through two channels: the tertiary air inlet 23 and the quaternary air inlet 28. The airflow through the tertiary air inlet 23 is adjusted by the opening of the third airflow regulating valve 30. To increase the tertiary airflow, the valve 30 is opened wider; to decrease it, it is closed. As the material falls, it passes through several second dispersing plates 25, undergoing thorough heat exchange with the high-temperature drying gas from the tertiary air inlet 23, gradually reducing its moisture content. During its fall, the material again encounters, disperses, and exchanges heat with the hot gas from the quaternary air inlet 28. The airflow through the quaternary air inlet 28 is adjusted by the opening of the fourth airflow regulating valve 31. When it is necessary to increase the fourth air volume, the opening of the fourth air volume regulating valve 31 is increased; when it is necessary to decrease the fourth air volume, the opening of the fourth air volume regulating valve 31 is decreased. The material after the drying effect is consolidated is discharged through the second multi-stage flip-type airlock valve 29 and the second discharge port 27.

[0036] Example 2

[0037] like Figure 1As shown, the present invention provides a vertical drying system using a two-stage vertical drying device as described in Embodiment 1. The primary air inlet 3 is connected to an air inlet duct, which includes a hot air duct 12 and a first cold air duct 13. The hot air duct 12 is equipped with a hot air control valve 41, and the first cold air duct 13 is equipped with a fifth airflow regulating valve 14. The hot air duct 12 and the first cold air duct 13 are connected. The secondary air inlet 8 is connected to the primary air inlet 3, and the primary air outlet 4 is connected to one end of a dust collector 15. The tertiary air inlet 23 is connected to the air inlet duct, which also includes a second cold air duct 33. The second cold air duct 33 is connected to the hot air duct 12 and is equipped with a fifth airflow regulating valve 14. The air volume regulating valve 34 connects the fourth air inlet 28 to the third air inlet 23; the second air outlet 24 merges with the first air outlet 4 and connects to one end of the dust collector 15, and the other end of the dust collector 15 connects to the system exhaust fan 16; a first temperature and pressure monitoring point 17 is provided at the first air inlet 3, a second temperature and pressure monitoring point 18 is provided at the connection between the first air outlet 4 and the dust collector 15, and a first material temperature monitoring point 19 is provided at the bottom of the first discharge port 7; a third temperature and pressure monitoring point 37 is provided at the third air inlet 23, a fourth temperature and pressure monitoring point 38 is provided at the connection between the second air outlet 24 and the dust collector 15, and a second material temperature monitoring point 39 is provided at the bottom of the second discharge port 27.

[0038] During drying, the wet material is evenly dispersed along the width of the first dispersing plate 5 by the distributor 20 inside the feed inlet 2 of the A-stage dryer of the dual-stage high-efficiency vertical dryer and then fed into the first V-shaped shell 1. Hot and cold air from the drying heat source enter the first V-shaped shell 1 through the air supply pipe via the primary air inlet 3 and the secondary air inlet 8. The air volume through the primary air inlet 3 is adjusted by the opening of the first air volume regulating valve 10. The drying air temperature is adjusted by the opening of the fifth air volume regulating valve 14. The temperature of the first temperature and pressure monitoring point 17 is monitored. When the temperature of the first temperature and pressure monitoring point 17 is too high, the opening of the fifth air volume regulating valve 14 is increased to increase the amount of cold air entering and reduce the drying air temperature entering the A-stage dryer. When the temperature of the first temperature and pressure monitoring point 17 is too low, the opening of the fifth air volume regulating valve 14 is decreased to reduce the amount of cold air entering and increase the drying air temperature entering the A-stage vertical dryer.

[0039] Medium-moisture material from the A-stage dryer is fed into the second V-shaped shell 21 through the first discharge port 7 of the A-stage dryer. The material is evenly dispersed along the width of the second dispersing plate 25 and, together with the hot and cold airflow from the drying heat source, enters the second V-shaped shell 21 through the air supply pipe via the tertiary air inlet 23 and the quaternary air inlet 28. The airflow through the tertiary air inlet 23 is adjusted by the opening of the third airflow regulating valve 30. The drying air temperature is regulated by the opening of the sixth airflow regulating valve 34. The temperature at the third temperature and pressure monitoring point 37 is monitored. When the temperature at the third temperature and pressure monitoring point 37 is too high, the opening of the sixth airflow regulating valve 34 is increased to increase the amount of cold air entering and reduce the drying air temperature entering the vertical dryer. When the temperature at the third temperature and pressure monitoring point 37 is too low, the opening of the sixth airflow regulating valve 34 is decreased to reduce the amount of cold air entering and increase the drying air temperature entering the vertical dryer.

[0040] The total amount of drying air is adjusted by regulating the speed of the system exhaust fan 16. When it is necessary to increase the drying air volume, the speed of the system exhaust fan 16 is increased; when it is necessary to reduce the drying air volume, the speed of the system exhaust fan 16 is decreased. When it is necessary to increase the primary air volume of the A-stage dryer, the opening of the first air volume regulating valve 10 is increased; when it is necessary to reduce the primary air volume of the A-stage dryer, the opening of the first air volume regulating valve 10 is decreased. During the falling process, the material passes through several first dispersing plates 5 and fully exchanges heat with the high-temperature drying gas from the primary air inlet 3, gradually reducing the moisture content. During the falling process, the material encounters, disperses, and exchanges heat again with the hot gas from the secondary air inlet 8. The air volume through the secondary air inlet 8 is adjusted by the opening of the second air volume regulating valve 11. When it is necessary to increase the secondary air volume, the opening of the second air volume regulating valve 11 is increased; when it is necessary to reduce the secondary air volume, the opening of the second air volume regulating valve 11 is decreased. The material after the drying effect is consolidated is discharged through the first multi-stage flip-type airlock valve 9 and the first discharge port 7 into the B-stage dryer.

[0041] When it is necessary to increase the tertiary air volume of the B-stage dryer, the opening of the third air volume regulating valve 30 is increased; when it is necessary to decrease the tertiary air volume of the B-stage dryer, the opening of the third air volume regulating valve 30 is decreased. During the falling process, the material passes through several second dispersing plates 25, and fully exchanges heat with the high-temperature drying gas from the tertiary air inlet 23, gradually reducing the moisture content. During the falling process, the material encounters, disperses, and exchanges heat again with the hot gas from the fourth air inlet 28. The air volume of the fourth air inlet 28 is adjusted by the opening of the fourth air volume regulating valve 31. When it is necessary to increase the tertiary air volume, the opening of the fourth air volume regulating valve 31 is increased; when it is necessary to decrease the tertiary air volume, the opening of the fourth air volume regulating valve 31 is decreased. After the drying effect is consolidated, the material is discharged as the finished product through the second multi-stage flap airlock valve 29 and the second discharge port 27.

[0042] The temperature of the drying exhaust gas from the dual-stage high-efficiency vertical dryer is significantly reduced after heat exchange with the material. Under the extraction of the system exhaust fan 16, the exhaust gas containing a large amount of water vapor is discharged from the dual-stage vertical dryer through the primary outlet 4 and the secondary outlet 24. After purification by the bag dust collector 15, it is discharged into the atmosphere. The dust collected by the bag dust collector 15 is directly used as the finished product. The first material temperature monitoring point 19 at the bottom of the first discharge port 7 and the second material temperature monitoring point 39 at the bottom of the second discharge port are used to detect the temperature of the dried material and to evaluate the drying effect. If the material temperature at the first temperature monitoring point 19 is too high, the opening of the fifth airflow regulating valve 14 of the A-stage dryer can be increased to lower the drying air temperature; if the material temperature at the first temperature monitoring point 19 is too low, the opening of the fifth airflow regulating valve 14 can be decreased to increase the drying air temperature.

[0043] If the material temperature at the second material temperature monitoring point 39 is too high, the opening of the sixth air volume regulating valve 34 of the B-stage dryer can be increased to reduce the drying air temperature; if the material temperature at the second material temperature monitoring point 39 is too low, the opening of the sixth air volume regulating valve 34 can be decreased to increase the drying air temperature.

[0044] During system operation, the pressure difference between the first temperature and pressure monitoring point 17 and the second temperature and pressure monitoring point 18 can be used to assess whether there is material blockage in the A-stage dual-stage high-efficiency vertical dryer. If the pressure difference between the first temperature and pressure monitoring point 17 and the second temperature and pressure monitoring point 18 is ≥600Pa, it indicates that there may be material blockage in the A-stage dual-stage high-efficiency vertical dryer, and the fault should be checked and eliminated. If the pressure difference between the first temperature and pressure monitoring point 17 and the second temperature and pressure monitoring point 18 is ≤200Pa, it indicates that the material distribution in the A-stage dual-stage high-efficiency vertical dryer may be uneven or interrupted, and the fault should be checked and eliminated.

[0045] During system operation, the pressure difference between the third temperature and pressure monitoring point 37 and the fourth temperature and pressure monitoring point 38 can be used to assess whether there is material blockage in the B-stage dual-stage high-efficiency vertical dryer. If the pressure difference between the third temperature and pressure monitoring point 37 and the fourth temperature and pressure monitoring point 38 is ≥600Pa, it indicates that there may be material blockage in the B-stage dual-stage high-efficiency vertical dryer, and the fault should be checked and eliminated. If the pressure difference between the third temperature and pressure monitoring point 37 and the fourth temperature and pressure monitoring point 38 is ≤200Pa, it indicates that the material distribution in the B-stage dual-stage high-efficiency vertical dryer may be uneven or interrupted, and the fault should be checked and eliminated.

Claims

1. A two-stage vertical drying device, characterized in that, The system includes an A-stage vertical dryer and a B-stage vertical dryer. The A-stage dryer includes a first V-shaped shell (1). The first V-shaped shell (1) has a feed inlet (2) at the top center. The feed inlet (2) has a primary air inlet (3) on one side and a primary air outlet (4) on the other side. The bottom of the feed inlet (2) in the first V-shaped shell (1) near the primary air inlet (3) has several first dispersing plates (5). The bottom of the feed inlet (2) near the primary air outlet (4) has several first air distribution guide plates (6) arranged in a stepped, inclined manner from top to bottom. The bottom of the first V-shaped shell (1) has a first discharge port (7). The first discharge port (7) is connected to the second V-shaped shell (21) of the B-stage vertical dryer and serves as the feed inlet of the B-stage vertical dryer. The first discharge port (7) has a first multi-stage flap airlock valve (9). The bottom of the first V-shaped shell (1) has a secondary air inlet. (8) The first discharge port (7) of the B-stage vertical dryer has a third air inlet (23) on one side of the bottom of the first discharge port (7) and a second air outlet (24) on the other side. The third air inlet (23) at the bottom of the first discharge port (7) has several second dispersing plates (25) on one side and several second air distribution guide plates (26) on one side near the second air outlet (24). The second discharge port (27) at the bottom of the second V-shaped shell (21) has a fourth air inlet (28) at the bottom. The second discharge port (27) has a second multi-stage flip-plate airlock valve (29) inside. The air volume and air temperature of the A-stage vertical dryer and the B-stage vertical dryer are controlled separately. The first material temperature monitoring point (19) is provided at the bottom of the first discharge port (7). The second material temperature monitoring point (39) is provided at the bottom of the second discharge port (27).

2. The dual-stage vertical drying equipment according to claim 1, characterized in that, The feed inlet (2) is equipped with a feeder (20).

3. The dual-stage vertical drying equipment according to claim 1, characterized in that, The first V-shaped shell (1) adopts a variable cross-section cavity structure.

4. The dual-stage vertical drying equipment according to claim 1, characterized in that, The tilt angle of the second dispersing plate (25) is smaller than that of the first dispersing plate (5).

5. A vertical drying device according to claim 1, characterized in that, The primary air inlet (3) is equipped with a first air volume regulating valve (10), the secondary air inlet (8) is equipped with a second air volume regulating valve (11), the tertiary air inlet (23) is equipped with a third air volume regulating valve (30), and the quaternary air inlet (28) is equipped with a fourth air volume regulating valve (31).

6. A drying system using the two-stage vertical drying equipment as described in claim 1, characterized in that, The primary air inlet (3) is connected to the air inlet duct, which includes a hot air duct (12) and a first cold air duct (13). The hot air duct (12) is equipped with a hot air control valve (41), and the first cold air duct (13) is equipped with a fifth air volume regulating valve (14). The hot air duct (12) and the first cold air duct (13) are connected. The secondary air inlet (8) is connected to the primary air inlet (3), and the primary air outlet (4) is connected to one end of the dust collector (15). The third air inlet (23) is connected to the air inlet pipe, which also includes a second cold air pipe (33), which is connected to the hot air pipe (12) and is equipped with a sixth air volume regulating valve (34). The fourth air inlet (28) is connected to the third air inlet (23). The second air outlet (24) and the first air outlet (4) merge and are connected to one end of the dust collector (15). The other end of the dust collector (15) is connected to the system exhaust fan (16). The primary air inlet (3) is provided with a first temperature and pressure monitoring point (17), the primary air outlet (4) is provided with a second temperature and pressure monitoring point (18) at the connection between it and the dust collector (15), the tertiary air inlet (23) is provided with a third temperature and pressure monitoring point (37), and the secondary air outlet (24) is provided with a fourth temperature and pressure monitoring point (38) at the connection between it and the dust collector (15).

7. A drying method using the drying system as described in claim 6, characterized in that, Includes the following steps: S1: The wet material is forcibly dispersed through the feeder (20) in the feed inlet (2) and then fed into the first V-shaped shell (1) of the A-stage dryer; S2: The hot air from the drying air source enters the first V-shaped housing (1) through the primary air inlet (3) and the secondary air inlet (8), and then enters the second V-shaped housing (21) through the tertiary air inlet (23) and the quaternary air inlet (28); S3: Adjust the speed of the system exhaust fan (16) to adjust the total amount of drying air; S4: Each temperature and pressure monitoring point detects the air temperature, and adjusts the air volume and air temperature at each air inlet by adjusting the opening of each air volume regulating valve and hot air control valve. S5: Monitor the pressure difference between the first temperature and pressure monitoring point (17) and the second temperature and pressure monitoring point (18) to assess whether there is material blockage in the A-stage vertical dryer. If the pressure difference between the first temperature and pressure monitoring point (17) and the second temperature and pressure monitoring point (18) is ≥600Pa, it indicates that there may be material blockage in the A-stage vertical dryer, and the fault should be checked and eliminated. If the pressure difference between the first temperature and pressure monitoring point (17) and the second temperature and pressure monitoring point (18) is ≤200Pa, it indicates that the material distribution in the A-stage vertical dryer is uneven or interrupted, and the fault should be checked and eliminated. The pressure difference between the third temperature and pressure monitoring point (37) and the fourth temperature and pressure monitoring point (38) is used to assess whether there is material blockage in the B-stage vertical dryer. If the pressure difference between the third temperature and pressure monitoring point (37) and the fourth temperature and pressure monitoring point (38) is ≥600Pa, it indicates that there may be material blockage in the B-stage vertical dryer, and the fault should be checked and eliminated. If the pressure difference between the third temperature and pressure monitoring point (37) and the fourth temperature and pressure monitoring point (38) is ≤200Pa, it indicates that there may be uneven material distribution or material breakage in the B-stage vertical dryer, and the fault should be checked and eliminated. S6: Monitor the temperature of the material temperature monitoring point and evaluate the drying effect of the material in stages A and B respectively; S7: The dust in the drying exhaust gas is collected by the bag dust collector (15), and the collected dust is used as the finished product.

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