Single-cone mixed drying system and process for directly drying hot air

Abstract

The invention relates to the technical field of single-cone mixed drying machines, in particular to a single-cone mixed drying system and process for directly drying hot air. The effect of reducing heat loss is achieved by introducing hot air into the conical container to make direct contact with materials, heating is more uniform, the drying temperature in the conical container can be controlled by directly adjusting the temperature of the hot air, and the material drying requirements under different conditions are met. In addition, the device is further provided with a liquid drainage system, solid-liquid separation of materials in the working process is facilitated, the drying time is shortened, the drying efficiency is improved, two spiral nitrogen is blown into the conical container from the bottom of the conical container in the drying process, the materials make direct contact with the spiral nitrogen, material bonding is effectively prevented, pilling is not likely to happen, and material residues at the bottom of the conical container are reduced. The material loss is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of using a single cone mixing dryer, in particular to a single cone mixing drying system and process for direct hot air drying. Background Art

[0002] Drying of materials is an important link in the production process of food, medicine and chemical industry. The single cone mixing dryer is economical and simple, and plays an important role in the fields of food, medicine and chemical production. The conventional single cone mixing dryer has a structure as shown in CN202022685151.9. Therefore, conventional drying by a single cone mixing dryer is a reduced pressure drying in the form of a jacketed heat medium and vacuum state. The vacuum reduces the boiling point of the solvent and the jacket heats the material for drying. In the above production process, for materials whose solvents are solvents with a high boiling point such as water and whose materials are seriously heat-sensitive and cannot be dried at too high a temperature, the drying efficiency is slow, the material is heated unevenly, and it is easy to form lumps; the drying temperature is not accurate. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and to provide a single cone drying system and process for direct hot air drying.

[0004] The technical solution adopted by the present invention is as follows: a single-cone mixing drying system for direct hot air drying, a gas heating air intake system, including an air intake pipe and a gas heater, the gas heater heats the air intake of the air intake pipe to form hot air; a single-cone mixer device, including a conical container with a drying inner cavity, a discharge flange and a hemispherical valve are connected to the bottom of the conical container in sequence, a conical stirring blade and a driving system for driving the conical stirring blade to rotate are arranged in the conical container, a dust collecting device connected to the drying inner cavity and a hot and humid air outlet and a feeding port are arranged on the top of the conical container, and a conical container connected to the drying inner cavity is arranged in the middle of the conical container. The first hot air inlet pipe of the cavity is provided with a first filter at the outlet of the first hot air inlet pipe, the second hot air inlet pipe connected to the drying cavity is provided on the discharge flange and a second filter is provided at the outlet, the dust collecting device and the hot and humid air outlet are connected to the exhaust pipe, the first hot air inlet pipe and the second hot air inlet pipe are both connected to the air intake pipe, the hemispherical valve comprises a valve body connected to the discharge flange and a hemispherical valve core arranged in the valve body, a sealing ring that seals with the valve body and a third filter at the center of the sealing ring are fixed on the hemispherical valve core, and a through opening is opened on the hemispherical valve core corresponding to the center of the sealing ring.

[0005] Preferably, the first hot air inlet pipes are provided with two and at least two first hot air inlet pipes are distributed at different heights of the cone container, and the number can be adjusted according to the size of the single cone dryer equipment to achieve the effect of fully drying the material.

[0006] Preferably, the outlet of the second hot air inlet pipe corresponds to the position of the third filter screen, so that when the second hot air inlet pipe blows hot air into the single-cone dryer equipment, the material at the bottom of the cone container is blown up at the same time to avoid clogging of the third filter screen.

[0007] Preferably, the discharge flange is provided with two spiral nitrogen blowing air passages to ensure all-round and dead-angle-free blowing of the bottom material.

[0008] Preferably, both ends of the hemispherical valve core are respectively connected to a drive shaft and a third hot gas inlet pipe, the drive shaft passes through the valve body to be connected to a rotation drive device, and the third hot gas inlet pipe passes through the valve body and is connected to an air intake pipe.

[0009] Preferably, the third hot air inlet pipe is connected to the air intake pipe via a three-way valve, another connection port of the three-way valve is connected to the drain pipe, and a connecting port and a connecting channel between the third hot air inlet pipe are provided in the hemispherical valve core.

[0010] Preferably, the gas heating intake system is used to heat the compressed air and control the intake temperature. The intake system continuously introduces hot air into the single cone mixer from the bottom side of the equipment. At the same time, driven by the conical stirring blades of the single cone mixer, it fully exchanges heat with the material to improve the heating efficiency and heat the material evenly. The hot and humid air after the exchange is discharged through the exhaust port. The drainage system is used to discharge the liquid brought out by the compressed air during the material drying process.

[0011] As a preferred method, the electric heating method of the gas heater can meet the temperature required in different drying stages and the drying temperature requirements of different materials, while reducing external valves and pipelines and reducing the overall size.

[0012] Preferably, the single cone mixing dryer is provided with a heat insulation layer to reduce heat loss during the drying process.

[0013] Preferably, the first filter screen provided at the outlet of the first hot gas inlet pipe, the second filter screen provided at the outlet of the second hot gas inlet pipe, the third filter screen provided on the valve core of the hemispherical valve and the filter screen in the dust collecting device can be selected from filter screens with a pore size range of 5-50μm. Different filter screens can be selected according to the particle diameters of different materials to avoid material loss during the drying process.

[0014] Preferably, the conical stirring blade is driven by a motor to realize forward and reverse rotation of the conical stirring blade. The conical stirring blade adopts a double spiral belt, and the mixing of materials with different densities and particle sizes is not prone to stratification and segregation; it also has good adaptability to the mixing of various particles such as coarse particles, fine particles and ultrafine particles.

[0015] Preferably, the sealing ring and the hemispherical valve core are fastened by a plurality of bolts, and the third filter screen is provided with a connecting ring superimposed between the sealing ring and the hemispherical valve core, so as to improve the sealing performance of the equipment during the initial solid-liquid separation stage and when the pneumatic hammer is activated in the later stage of drying.

[0016] The present invention also provides a drying process of the single cone mixing drying system using the hot air direct drying as described above, comprising the following steps:

[0017] S1: The material enters the equipment through the feed port of the cone container, and the liquid in the material is filtered and discharged through the third filter screen of the hemispherical valve to achieve preliminary solid-liquid separation;

[0018] S2: After being heated and temperature-controlled by the gas heater, the gas enters the inner cavity of the conical container through the first hot gas inlet pipe in the middle of the conical container and the second hot gas inlet pipe of the discharge flange. Driven by the gas pressurization and the conical stirring blades, part of the liquid in the material is accelerated to be filtered out through the third filter screen of the hemispherical valve, and the other part is driven by the gas to be discharged from the dust collecting device, the hot and humid gas outlet and the connected branch liquid discharge pipe;

[0019] S3: until the drying is completed, the material is discharged from the outlet of the hemispherical valve;

[0020] S4: During the drying process, hot air will be continuously introduced from the branch pipes connected to the dust collecting device and the hot and humid air outlet to prevent the filter of the dust collecting device from being blocked.

[0021] Furthermore, in step S1, the liquid in the material is filtered through the third filter screen of the hemispherical valve and discharged through the branch pipe connected to the third hot gas inlet pipe of the hemispherical valve, thereby achieving preliminary solid-liquid separation;

[0022] In S3, after a period of liquid drainage in step S2, no liquid is discharged from the branch pipe connected to the third hot air inlet pipe of the hemispherical valve, and hot air begins to be introduced into the third hot air inlet pipe of the hemispherical valve until drying is completed, and the material is discharged from the discharge port of the hemispherical valve.

[0023] The beneficial effects of the present invention are as follows: the present invention reduces heat loss by introducing hot air into the conical container to directly contact the material, and the heating is more uniform. The drying temperature in the conical container can be controlled by directly adjusting the hot air temperature to meet the material drying requirements under different conditions.

[0024] In addition, the present invention is also equipped with a drainage system to separate the solid and liquid of the material during the working process, thereby reducing the drying time and improving the drying efficiency. During the drying process, two spiral nitrogen gases are blown into the interior from the bottom of the conical container, and the material is in direct contact with the nitrogen gases, which effectively prevents the material from sticking together, making it difficult to pilling, and reduces the amount of material remaining at the bottom of the conical container, thereby reducing material loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0026] Figure 1 A schematic diagram of pipeline connection according to an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the structure of an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the interior of the air inlet pipe side of a cone container according to an embodiment of the present invention;

[0029] Figure 4 for Figure 3 A schematic diagram of the structure of the stirring mechanism in the structure;

[0030] Figure 5 for Figure 3 A schematic diagram of the structure of the internal connecting channel of the hemispherical valve in the structure;

[0031] Figure 6 for Figure 3 Schematic diagram of the spiral air duct structure of the discharge flange in the structure.

[0032] In the figure:

[0033] A-inlet end; B-feed end; C-discharge end; D-exhaust end;

[0034] 1-gas heating intake system; 101-intake pipe; 102-gas heater; 2-exhaust pipe;

[0035] 3-cone container; 301-first hot air inlet pipe A; 302-first filter A; 303-first hot air inlet pipe B; 304-first filter B;

[0036] 4-cone cover; 401-feeding port; 402-dust collecting device and hot and humid air outlet;

[0037] 5-driving system; 501-motor; 502-mechanical sealing structure; 503-driving shaft;

[0038] 6-stirring mechanism; 601-stirring shaft; 602-conical stirring blade; 7-insulating layer;

[0039] 8-discharging flange; 801-second hot air inlet pipe A; 802-second filter screen; 803-second hot air inlet pipe B; 804-spiral airway

[0040] 9-semi-ball valve; 901-third hot gas inlet pipe; 902-third filter screen; 903-valve body; 904-semi-ball valve core; 905-sealing ring; 906-through port; 907-connecting channel; 908-discharge port;

[0041] 10-pneumatic hammer; 11-drain pipe; 12-material pipeline. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. Therefore, the direction and position terms used are used to illustrate and understand the present invention, rather than to limit the scope of protection of the present invention.

[0045] Embodiment 1:

[0046] This embodiment proposes a single cone drying system for direct hot air drying, which is mainly used in the current fields of food, medicine and chemical production to achieve efficient and automatic drying of materials such as food and medicine, thereby achieving the purpose of improving drying efficiency.

[0047] See also Figures 1 to 6In an embodiment of the present invention, a single-cone mixing drying system for direct hot air drying comprises: a gas heating intake system 1, comprising an intake pipe 101 and a gas heater 102, wherein the gas heater 102 heats the intake air of the intake pipe 101 to form hot air; a single-cone mixer device comprises a cone container 3 provided with a drying inner cavity, wherein a discharge flange 8 and a discharge semi-ball valve 9 are sequentially connected to the bottom of the cone container 3, a cone stirring blade 602 and a driving system 5 for driving the cone stirring blade 602 to rotate are arranged in the cone container 3, a dust collecting device connected to the drying inner cavity and a hot and humid air outlet 402 and a feed port 401 are arranged at the top of the cone container 3, a first hot air inlet pipe A301 and a first hot air inlet pipe B303 connected to the drying inner cavity are arranged in the middle of the cone container 3, and a first hot air inlet pipe A301 and a first hot air inlet pipe B303 are arranged between the first hot air inlet pipe A301 and the first A first filter A302 and a first filter B304 are respectively provided at the outlet of the hot air inlet pipe B303, a second hot air inlet pipe A801 ​​and a second hot air inlet pipe B803 connected to the drying inner cavity are provided on the discharge flange 8, and a second filter 802 is provided at the outlets of the two, the dust collection device and the hot and humid air outlet 402 are connected to the exhaust pipe 2, the first hot air inlet pipe 301 and the second hot air inlet pipe 801 are both connected to the air intake pipe 101, and the discharge hemispherical valve 9 includes a valve body 903 connected to the discharge flange 8 and a hemispherical valve core 904 arranged in the valve body 903, a sealing ring 905 that seals with the valve body 903 and a third filter 902 at the center of the sealing ring 905 are fixed on the hemispherical valve core 904, and a through opening 906 is opened on the hemispherical valve core 904 corresponding to the center of the sealing ring 905.

[0048] Specifically, the material to be dried is connected to the feed port 401 of the cone cover 4 through the material pipeline 12 and pumped into the cone container 3. The liquid contained in the material is separated by the third filter screen 902 that is sealed with the semi-ball valve, and then enters the connecting channel 907 of the semi-ball valve 9 through the port 906, and enters the drainage pipe 11 from the third hot air inlet pipe 901 to be discharged from the device. The third filter screen 902 is arranged at the pipe mouth of the third hot air inlet pipe 901, which accelerates the liquid in the material to enter the branch drainage pipe 11 from the third hot air inlet pipe 901 through the connecting channel 907 connected to the semi-ball valve port 906, thereby achieving the effect of preliminary solid-liquid separation. The third hot air inlet pipe 901 is connected to the air inlet pipe 101 through a three-way valve, and the other connecting port of the three-way valve is connected to the drainage pipe 11. The semi-ball valve core 904 is provided with a channel 907 connecting the port 906 and the third hot air inlet pipe 901 so as to achieve the mutual non-interference between the air intake process and the drainage process.

[0049] Furthermore, at least two first hot air inlet pipes are provided on one side of the conical container 3 and the at least two first hot air inlet pipes are distributed at different heights of the conical container 3. Therefore, there is no special restriction on the number of hot air inlet pipes. Specifically in the present embodiment, two hot air inlet pipes are provided on one side of the conical container 3, namely, the first hot air inlet pipe A301 and the first hot air inlet pipe B303.

[0050] After completing the preliminary solid-liquid separation, the driving system 5 starts to drive the stirring mechanism 6 to work, and the stirring shaft 601 is connected to the conical stirring blade 602 by welding, driving the material to move in the conical container 3 for spiral stirring; at the same time, the gas heating intake system 1 starts to work, and the gas heater 102 heats the gas in the intake pipe 101 and controls the temperature to a temperature suitable for the added material. Then, the dust collecting device and the hot and humid air outlet 402, the first hot air inlet pipe A301, the first hot air inlet pipe B303, the second hot air inlet pipe A801 ​​on both sides of the discharge flange 8, the second hot air inlet pipe B802 and the third hot air inlet pipe 901 respectively spray hot air from the upper part, the middle part and the bottom part of the conical container 3 into the container, blow the material on the container, and make the material tumble. Under the action of gas pressurization and the stirring mechanism 6, the remaining liquid in the material is accelerated to be discharged from the container in the form of hot and humid air from the hot and humid air outlet 402 provided with a filter.

[0051] Furthermore, the second hot air inlet pipe A801 ​​includes a spiral air duct 805 arranged in the discharge flange 8, and the spiral air duct 805 is connected to the container to spirally spray high-temperature nitrogen into the container to achieve the purpose of gas pressurization and increase the contact with the material, and make the material tumble in the container, not easy to adhere to the surface of the container, and reduce material loss; among them, the first, second, and third hot air inlet pipes and the second hot air inlet pipe A801 ​​and the second hot air inlet pipe B803 are the main air inlet ends, and the dust collection device and the hot and humid air exhaust port 402 mainly play the role of discharging hot and humid air in the later stage of drying, and during the drying process, the hot and humid air will be continuously discharged. Hot air is introduced into the branch pipe connected to the air outlet to prevent the filter from being blocked; a condensing device is provided in the pipe for discharging hot and humid air so as to separate the discharged hot and humid air into gas and liquid, wherein one end of the exhaust pipe 2 is connected to the discharge pipe 11; an insulating layer 7 is provided on the single-cone mixing dryer, and the stirring shaft 601 is driven by the motor 501 to realize the forward rotation, reverse rotation, lifting and lowering of the conical stirring blade 602. The conical stirring blade 602 is a double-screw structure, and it is not easy to cause stratification and segregation when mixing materials with different densities and particle sizes; it also has good adaptability to the mixing of various particles such as coarse particles, fine particles and ultrafine particles.

[0052] After the above-mentioned period of drainage stage, no liquid is discharged from the branch pipe connected to the air inlet of the semi-spherical valve, and hot air continues to be introduced into the semi-spherical valve from the third hot air inlet pipe 901 until the material and the inside of the semi-spherical valve are completely dried. After drying, the pneumatic hammer 10 is started to allow the material to enter the semi-spherical valve from the cone container 3 through the third filter screen 902, and the driving shaft 503 rotates the semi-spherical valve core 904 under the drive of the motor, and the material is discharged from the discharge port 908.

[0053] Furthermore, the sealing ring 905 and the hemispherical valve core 904 are fastened by a plurality of bolts, and the third filter screen 902 is provided with a connecting ring superimposed between the sealing ring 905 and the hemispherical valve core 904, so that under the action of the pneumatic hammer 10, the third filter screen can be effectively fixed, so that the dry material can pass smoothly.

[0054] Embodiment 2:

[0055] A single cone mixed drying process with direct hot air drying, the process adopts the single cone mixed drying system with direct hot air drying provided in Example 1.

[0056] This process is specifically implemented through the following steps:

[0057] S1: The material enters the equipment through the feed port 401 at the top end of the conical container 3, and the liquid in the material is filtered and discharged through the third filter screen 902 of the hemispherical valve 9, specifically, it is discharged through the branch pipe connected to the third hot air inlet pipe 901 of the hemispherical valve 9, to achieve preliminary solid-liquid separation.

[0058] S2: After being heated and temperature-controlled by the gas heater 102, the gas enters the inner cavity of the conical container 3 through the first hot gas inlet pipe A301 and the first hot gas inlet pipe B303 in the middle of the conical container 3 and the second hot gas inlet pipe A801 ​​and the second hot gas inlet pipe B803 of the discharge flange 8. Driven by the gas pressurization and the conical stirring blades 602, a part of the liquid in the material is accelerated to be filtered and discharged through the third filter screen 902 of the hemispherical valve 9, and the other part is driven by the gas to be discharged through the dust collection device, the hot and humid gas outlet 402 and the connected branch drainage pipe.

[0059] S3: After the above-mentioned period of liquid discharge, no liquid is discharged from the branch pipe connected to the third hot air inlet pipe 901 of the hemispherical valve 9, and hot air begins to be introduced into the third hot air inlet pipe 901 of the hemispherical valve 9 until the drying is completed, and the material is discharged from the discharge port of the hemispherical valve 9.

[0060] S4: During the drying process, hot air is continuously introduced from the branch pipe connected to the dust collecting device and the hot and wet air outlet 402 to prevent the filter screen of the dust collecting device from being blocked.

[0061] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A single cone mixing drying system for direct hot air drying, characterized in that: include: A gas heating air intake system (1) comprises an air intake pipe (101) and a gas heater (102), wherein the gas heater (102) heats the air intake of the air intake pipe (101) to form hot air; A single cone mixer device comprises a cone container (3) provided with a drying inner cavity, the bottom of the cone container (3) being connected in sequence with a discharge flange (8) and a semi-ball valve (9), the cone container (3) being provided with a cone stirring blade (602) and a driving system (5) for driving the cone stirring blade (602) to rotate, the top of the cone container (3) being provided with a dust collecting device connected to the drying inner cavity and a hot and humid air outlet (402) and a feed port (401), the middle of the cone container (3) being provided with a first hot air inlet pipe connected to the drying inner cavity and a first filter screen (302) being provided at the outlet of the first hot air inlet pipe, the discharge flange (8) being provided with a second hot air inlet pipe connected to the drying inner cavity A second filter (802) is provided at the outlet, the dust collecting device and the hot and humid air outlet (402) are connected to the exhaust pipe (2), the first hot air inlet pipe and the second hot air inlet pipe are both connected to the air intake pipe (101), the hemispherical valve (9) comprises a valve body (903) connected to the discharge flange (8) and a hemispherical valve core (904) arranged in the valve body (903), a sealing ring (905) which is sealed with the valve body (903) and a third filter (902) at the center of the sealing ring (905) are fixed on the hemispherical valve core (904), and a through opening (906) is opened on the hemispherical valve core (904) corresponding to the center of the sealing ring (905).

2. The single cone mixed drying system for direct hot air drying according to claim 1 is characterized in that: There are two first hot air inlet pipes, and at least two first hot air inlet pipes are distributed at different heights of the conical container (3).

3. The single cone mixed drying system for direct hot air drying according to claim 1 is characterized in that: The outlet of the second hot air inlet pipe corresponds to the position of the third filter screen (902).

4. The single cone mixed drying system for direct hot air drying according to claim 3 is characterized in that: The second hot gas inlet pipe comprises a spiral gas channel (805) arranged in the discharge flange (8).

5. The single cone mixed drying system for direct hot air drying according to claim 1 is characterized in that: The two ends of the hemispherical valve core (904) are respectively connected to a drive shaft (503) and a third hot gas inlet pipe (901); the drive shaft (503) passes through the valve body (903) and is connected to a rotation drive device; the third hot gas inlet pipe (901) passes through the valve body (903) and is connected to an air intake pipe (101).

6. The single cone mixed drying system for direct hot air drying according to claim 5, characterized in that: The third hot air inlet pipe (901) is connected to the air inlet pipe (101) via a three-way valve, the other connection port of the three-way valve is connected to the liquid discharge pipe (11), and a connection port (906) and a connection channel (907) of the third hot air inlet pipe (901) are provided in the hemispherical valve core (904).

7. The single cone mixed drying system for direct hot air drying according to claim 1 is characterized in that: The sealing ring (905) and the hemispherical valve core (904) are connected and fastened by a plurality of bolts, and the third filter screen (902) is provided with a connecting ring superimposed between the sealing ring (905) and the hemispherical valve core (904).

8. A drying process using a single cone mixed drying system with direct hot air drying as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1: The material enters the device through the feed port (401) of the cone container (3), and the liquid contained in the material is filtered and discharged through the third filter screen (902) of the hemispherical valve (9), thereby achieving preliminary solid-liquid separation; S2: After the gas is heated and temperature-controlled by the gas heater (102), it enters the inner cavity of the conical container (3) through the first hot gas inlet pipe in the middle of the conical container (3) and the second hot gas inlet pipe of the discharge flange (8). Under the pressure of the gas and the drive of the conical stirring blade (602), a part of the liquid in the material is accelerated to be filtered and discharged through the third filter screen (902) of the hemispherical valve (9), and the other part is driven by the gas to be discharged from the dust collecting device and the hot and humid gas outlet (402) and the connected branch liquid discharge pipe; S3: until the drying is completed, the material is discharged from the discharge port of the hemispherical valve (9); S4: During the drying process, hot air is continuously introduced from the branch pipe connected to the dust collecting device and the hot and humid air outlet (402) to prevent the filter screen of the dust collecting device from being blocked.

9. The drying process of the single cone mixed drying system with direct hot air drying as claimed in claim 5 or 6 is characterized in that: The following steps are involved: S1: The material enters the device through the feed port (401) of the cone container (3), and the liquid contained in the material is filtered through the third filter screen (902) of the hemispherical valve (9), and discharged through the branch pipeline connected to the third hot air inlet pipe (901) of the hemispherical valve (9), thereby achieving preliminary solid-liquid separation; S2: After the gas is heated and temperature-controlled by the gas heater (102), it enters the inner cavity of the conical container (3) through the first hot gas inlet pipe in the middle of the conical container (3) and the second hot gas inlet pipe of the discharge flange (8). Under the pressure of the gas and the drive of the conical stirring blade (602), a part of the liquid in the material is accelerated to be filtered and discharged through the third filter screen (902) of the hemispherical valve (9), and the other part is driven by the gas to be discharged from the dust collecting device and the hot and humid gas outlet (402) and the connected branch liquid discharge pipe; S3: After a period of liquid discharge in step S2, no liquid is discharged from the branch pipe connected to the third hot air inlet pipe (901) of the semi-ball valve (9), and hot air is introduced into the third hot air inlet pipe (901) of the semi-ball valve (9) until drying is completed, and the material is discharged from the discharge port of the semi-ball valve (9); S4: During the drying process, hot air is continuously introduced from the branch pipe connected to the dust collecting device and the hot and humid air outlet (402) to prevent the filter screen of the dust collecting device from being blocked.

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