Environment-friendly spray dryer

Abstract

The invention relates to the technical field of spray drying, and discloses an environment-friendly spray dryer which comprises a drying tank, a spraying device, a drying device, a scraping device, a discharging pipe, a ventilating pipe and an air filter, a main body of the drying tank is a cylindrical tank, the lower end of the drying tank is funnel-shaped, and the spraying device is arranged on the drying tank and used for spraying mist materials. The drying device is arranged on the drying tank and used for drying vaporific materials, the scraping device is arranged on the drying tank and used for scraping away attached materials, the discharging pipe penetrates through the bottom of the drying tank and is internally and externally communicated, the ventilation pipe penetrates through the side wall of the drying tank and is internally and externally communicated, and the air filter is arranged in the middle of the ventilation pipe. Through circumferential scraping and brushing of the first scraping plate and the second scraping plate, scraping and brushing dead angles are avoided, the problem that materials adhere to the wall is effectively solved, residual accumulation of the materials in equipment is reduced, then waste gas VOCs caused by the fact that the materials adhere to the wall are prevented from being attached to residual dust, and the product quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of spray drying and discloses an environmentally friendly spray dryer. Background Art

[0002] In today's industrial production field, drying technology is a key link in the processing of many products. Spray dryers, as a highly efficient drying equipment, are widely used in many industries such as food, pharmaceuticals, and chemicals. However, with increasingly stringent environmental protection requirements and people's increasing attention to sustainable development, traditional spray dryers have gradually exposed a series of environmental pollution problems during operation.

[0003] During the material drying process of traditional spray dryers, materials may stick to the wall and exhaust VOCs may adhere to the residual dust, which not only affects the drying efficiency and product quality. In order to deal with these problems, an environmentally friendly spray dryer is proposed. Summary of the invention

[0004] The present invention aims to solve the technical problem that waste gas VOCs are attached to residual dust caused by material sticking to the wall of the existing spray dryer, and to provide an environmentally friendly spray dryer.

[0005] The technical solution adopted by the present invention to solve its technical problems is: an environmentally friendly spray dryer, characterized in that it includes a drying tank, a bracket, a spray device, a drying device, a scraper device, a discharge pipe, a ventilation pipe, an air filter, and a controller. The main body of the drying tank is a cylindrical tank, and its lower end is funnel-shaped. The bracket is arranged below the drying tank, and the bracket is fixedly connected to the side wall of the drying tank. The spray device is arranged on the drying tank for spraying mist materials. The drying device is arranged on the drying tank for drying the mist materials. The scraper device is arranged on the drying tank for scraping off the attached materials. The discharge pipe runs through the bottom of the drying tank, and the discharge pipe is fixedly connected to the bottom of the drying tank, and the inside and outside are connected. The ventilation pipe runs through the side wall of the drying tank, and the inside and outside are connected. The air filter is arranged in the middle of the ventilation pipe. The controller is arranged on the drying tank, and the controller is electrically connected to the spray device and the drying device.

[0006] The material is first sent to the spray device, and the controller starts the spray device. The spray device atomizes the material into tiny droplets to form mist material that is evenly sprayed in the drying tank; the drying device and the spray device work synchronously, and the drying device passes hot air into the drying tank. The hot air is fully in contact with the mist material to evaporate the water quickly, and the material gradually becomes solid particles. The solid particles fall to the bottom of the drying tank. When the material is drying, part of it will adhere to the inner wall of the tank. The scraper device is started, and the scraper device scrapes it off and returns to the bottom of the tank. After drying, the product particles are discharged from the drying tank through the discharge pipe, completing the material collection work. During the entire drying process, the exhaust gas in the drying tank is discharged from the drying tank through the ventilation pipe. The exhaust gas is filtered and purified by the air filter, which solves the problem of exhaust gas VOCs caused by material sticking to the wall adhering to the residual dust, and the resulting untimely treatment cannot meet environmental protection requirements, thereby improving the recovery rate, efficiency and product quality.

[0007] Furthermore, the spray device includes a protective cover, a first large sprocket, a first small sprocket, a motor, a feed tank, a feed pipe, an infusion tube, a booster pump, and an atomizing nozzle. The protective cover is arranged above the drying tank, and the protective cover is fixedly connected to the top surface of the drying tank. The motor output shaft is arranged vertically, the motor is arranged above the drying tank, the motor is arranged inside the protective cover, the motor is fixedly connected to the top surface of the drying tank, and the motor is electrically connected to the controller. The feed tank is arranged on the side of the drying tank, and the feed tank is fixedly connected to the bracket. The booster pump is arranged below the feed tank, the booster pump is fixedly connected to the bottom of the feed tank, and is interconnected, and the booster pump is electrically connected to the controller. The feed pipe is arranged vertically, the feed pipe passes through the top of the drying tank, and the feed pipe is rotatably connected to the top of the drying tank through a bearing, and its rotation axis coincides with its own axis. The atomizing nozzle is arranged inside the drying tank, the atomizing nozzle is arranged below the feed pipe, and the atomizing nozzle is fixedly connected to the lower end of the feed pipe, and is interconnected. The first large sprocket is sleeved on the motor output shaft, and the first large sprocket is fixedly connected to the motor output shaft. The first small sprocket is sleeved on the feed pipe, and the first small sprocket is fixedly connected to the feed pipe. The first large sprocket is connected to the first small sprocket through a chain transmission. The infusion tube runs through the side of the protective cover, the infusion tube connects the booster pump and the feed pipe, and the infusion tube is connected to the feed pipe through a rotary joint.

[0008] When the spray dryer starts working, first add materials into the feed tank, then control the booster pump to start and the motor to rotate forward and reverse through the controller, the motor output shaft rotates forward to drive the first large sprocket and the second large sprocket to rotate forward, and the first large sprocket chain drives the first small sprocket to rotate forward, the first small sprocket rotates forward to drive the feed pipe to rotate forward, and the feed pipe rotates forward to drive the atomizing nozzle to rotate forward, and at the same time, the controller controls the booster pump to start, and the material flows into the feed pipe through the booster pump and the infusion tube under the action of gravity, and finally reaches the atomizing nozzle, and the atomizing nozzle atomizes the material into a mist material. At this time, the atomizing nozzle rotates forward, and the atomizing nozzle atomizes the material into a mist material, so that the mist material is evenly spread in the drying tank under the action of centrifugal force; the working process of the atomizing nozzle rotating in the opposite direction is the same as above, ensuring that the atomizing nozzle can stably provide a mist material for the dryer.

[0009] Furthermore, the motor is connected to the top surface of the drying tank by bolts.

[0010] During the production and assembly process of the spray dryer, workers can easily fix the motor to the predetermined position on the top surface of the drying tank by bolts, thereby improving production efficiency.

[0011] Furthermore, the drying device includes a second large sprocket, a third large sprocket, a second small sprocket, an air inlet pipe, an air supply pipe, an air outlet pipe, a plurality of air outlets, fan blades, a heating wire, and a filter plate. The axis of the air supply pipe is arranged vertically and coincides with the center of the axis of the drying tank. The air supply pipe runs through the top of the drying tank. The air supply pipe is arranged inside the protective cover. The air supply pipe is rotatably connected to the top of the drying tank through a bearing, and its rotation axis coincides with its own axis. The third large sprocket is sleeved on the air supply pipe, and the third large sprocket is fixedly connected to the air supply pipe. The first large sprocket and the third large sprocket are connected by a chain transmission. The air outlet pipe is spiral, and its axis coincides with the axis of the air supply pipe. The air outlet pipe is arranged inside the drying tank, and the air outlet pipe is arranged below the air supply pipe. The air outlet pipe is fixedly connected to the lower end of the air supply pipe and is connected to each other. A plurality of air outlets are evenly distributed on the inner side of the air outlet pipe, and are connected inside and outside. The axis of the air inlet pipe coincides with the axis of the air supply pipe, the air inlet pipe is funnel-shaped, the lower end of the air inlet pipe passes through the top of the protective cover, and the lower end of the air inlet pipe is connected to the air supply pipe through a rotating joint. The second large sprocket is sleeved on the output shaft, the second large sprocket is arranged above the first large sprocket, and the second large sprocket is fixedly connected to the motor output shaft. The second small sprocket is sleeved on the lower end of the air inlet pipe, and the second small sprocket is fixedly connected to the air inlet pipe. The second large sprocket and the second small sprocket are connected by a chain transmission. The axis of the fan blade coincides with the axis of the air inlet pipe, the fan blade is arranged inside the air inlet pipe, and the fan blade is fixedly connected to the inner wall of the air inlet pipe. The heating wire is arranged above the fan blade, the heating wire is fixedly connected to the inner wall of the air inlet pipe, and the heating wire is electrically connected to the controller. The filter plate is arranged above the heating wire, and the bottom surface of the filter plate is fixedly connected to the air inlet pipe.

[0012] When the spray dryer starts working, the motor output shaft rotates forward to drive the first large sprocket and the second large sprocket to rotate forward, and the first large sprocket chain drives the third large sprocket to rotate forward, and the second large sprocket chain drives the second small sprocket to rotate forward, and the third large sprocket rotates forward to drive the air supply pipe to rotate forward, and the second small sprocket rotates forward to drive the air inlet pipe to rotate forward, and the air inlet pipe rotates forward to drive the fan blades to rotate forward, and the fan blades rotate forward to draw the outside air into the air inlet pipe, and the impurities and dust are filtered by the filter plate and then heated by the heating wire, and the heated hot air enters the air supply pipe through the air inlet pipe, and the air supply pipe sends the hot air into the air outlet pipe, and the air supply pipe rotates forward to drive The spiral air outlet pipe and the sun gear rotate forward, and the forward rotation of the air outlet pipe drives the cleaning ring to move downward in a spiral along the surface of the air outlet pipe. The forward rotation of the air outlet pipe rotates and evenly sprays the hot air into the drying tank through several air outlets of the spiral air outlet pipe, ensuring the uniform distribution of the hot air. At this time, the mist material is fully in contact with the hot air, and the moisture in the mist material evaporates rapidly to achieve drying; at this time, the mist material is spread in the drying tank, and the hot air is fully in contact with the mist material, and the moisture in the material evaporates rapidly, thereby realizing the drying process of the material, ensuring the uniform distribution of the hot air, providing a strong guarantee for the drying of the material, and improving the drying effect. The working process of the reverse rotation of the air outlet pipe is the same as above.

[0013] Furthermore, the scraping device includes a moving groove, a gear ring, a sun gear, a planetary gear, a first scraper, a second scraper, a slide groove, a slider, a spring, and a brush. The moving groove is an annular structure, and the moving groove is arranged at the top of the inner wall of the drying tank. The axis of the gear ring coincides with the axis of the drying tank, the gear ring is arranged inside the drying tank, the gear ring is arranged inside the moving groove, the gear ring is rotatably connected to the moving groove, and its rotation axis coincides with its own axis. The sun gear is sleeved on the air supply pipe, and the sun gear is fixedly connected to the air supply pipe. The axis of the planetary gear is parallel to the axis of the sun gear, the planetary gear is arranged on the side of the sun gear away from the feed pipe, the planetary gear and the sun gear and the gear ring are meshed and transmitted with each other, and the upper end of the planetary gear is rotatably connected to the top surface of the drying tank through a rotating shaft, and its axis coincides with its own axis. The first scraper is made of elastic material, the first scraper is arranged vertically, the first scraper is arranged below the gear ring, and the upper end of the first scraper is fixedly connected to the bottom surface of the gear ring. The second scraper is made of elastic material, the second scraper is inclined, and the upper end of the second scraper is fixedly connected to the lower end of the first scraper. The chute is an annular structure with a T-shaped cross section. The chute is set at the funnel-shaped connection of the drying tank. The slider is set inside the chute, and the slider is in close contact with the chute. The spring is set on the side of the slider, one end of the spring is fixedly connected to the connection between the first scraper and the second scraper, and the other end of the spring is fixedly connected to the side of the slider. The brushes are evenly distributed on the side of the first scraper, the brushes are fixedly connected to the side of the first scraper, and the brushes are in contact with the inner wall of the drying tank.

[0014] Since the motor output shaft performs periodic forward and reverse motion, the air supply pipe rotates forward and reverse with the forward and reverse rotation of the motor output shaft. The forward rotation of the sun gear drives the planetary gear to rotate in the reverse direction, and the reverse rotation of the planetary gear drives the gear ring to rotate forward along the moving groove. There is a speed difference between the forward rotation of the gear ring and the forward rotation of the air outlet pipe. The forward rotation of the gear ring drives the first scraper to rotate forward, and the forward rotation of the first scraper drives the second scraper and the brush to rotate forward. The forward rotation of the first scraper and the second scraper drives the slider to rotate forward along the slide groove through the spring. The forward rotation of the first scraper drives the brush to rotate forward along the inner wall of the drying tank. The brush rotates forward to clean the materials on the inner wall of the drying tank. The forward rotation of the second scraper drives the knocking block The second scraper rotates forward and passes through the blocking block and moves upward along the slope. The upward movement of the second scraper drives the spring to extend, and the knocking block climbs along the slope of the blocking block to accumulate potential energy. Under the pull of the spring, it breaks away from the slope, and produces a knocking effect on the bottom surface of the drying tank to loosen the bottom material and prevent accumulation and agglomeration; the first scraper rotates in the opposite direction to drive the brush to rotate in the opposite direction along the inner wall of the drying tank, and the brush rotates in the opposite direction to clean the material on the inner wall of the drying tank; the first scraper and the second scraper are used to scrape the inner wall of the drying tank back and forth to avoid dead corners and effectively solve the problem of material sticking to the wall.

[0015] Furthermore, it includes a slide rail, a fixed block, a connecting rod, and a cleaning ring. The slide rail is vertically arranged on the side of the first scraper near the air outlet pipe and is fixedly connected to the first scraper. The fixed block is arranged on the slide rail, and the fixed block is slidably connected to the slide rail, and its sliding direction is perpendicular to the ground. The cleaning ring is sleeved on the air outlet pipe, and the inner side of the cleaning ring contacts the surface of the air outlet pipe. The cleaning ring is fixedly connected to the side of the fixed block through the connecting rod.

[0016] The positive rotation of the air outlet duct drives the cleaning ring to move downward in a spiral along the surface of the air outlet duct. The downward movement of the cleaning ring drives the fixed block to move downward along the slide rail, and the cleaning ring cleans the outer surface of the air outlet duct to scrape off attached materials; the second scraper rotates in the opposite direction to the vertical surface of the blocking block, and the blocking block blocks the second scraper from continuing to rotate. At this time, the rotation of the air outlet duct can make the cleaning ring move upward faster, and the reverse rotation of the air outlet duct drives the cleaning ring to move upward and drives the fixed block to move upward along the slide rail, and the cleaning ring cleans the surface of the air outlet duct again to scrape off attached materials; the cleaning ring moves up and down to repeatedly clean the surface of the air outlet duct to keep the surface of the air outlet duct clean, further optimize the scraping effect, better solve the problem of material sticking to the wall, ensure that the entire drying process is not affected by material residues, and improve the working efficiency and product quality of the equipment.

[0017] Furthermore, it includes a blocking block and a knocking block. One side of the blocking block is sloped, the blocking block is arranged inside the drying tank, and the blocking block is fixedly connected to the bottom surface of the drying tank. The knocking block is arranged at the lower end of the second scraper, the knocking block is fixedly connected to the lower end of the second scraper, and the knocking block contacts the bottom surface of the drying tank.

[0018] The positive rotation of the second scraper drives the knocking block to rotate forward. The second scraper rotates forward and passes through the blocking block and moves upward along the slope. The upward movement of the second scraper drives the spring to extend. The knocking block climbs along the slope of the blocking block to accumulate potential energy. Under the pull of the spring, it breaks away from the slope and knocks on the bottom surface of the drying tank to loosen the bottom material and prevent accumulation and agglomeration. The second scraper rotates in the opposite direction to the vertical surface of the blocking block. The blocking block blocks the second scraper from continuing to rotate. At this time, the rotation of the air outlet pipe can make the cleaning ring move upward faster.

[0019] Furthermore, the striking block is welded and fixed to the lower end of the second scraper.

[0020] Welding can provide a very strong connection strength, ensuring that the striking block will not become loose or fall off from the second scraper during long-term and frequent work.

[0021] Furthermore, it comprises a filter screen which is arranged inside the ventilation pipe and is fixedly connected to the air inlet of the ventilation pipe.

[0022] During the drying process, some material particles tend to move toward the ventilation pipe. The filter screen prevents the material in the drying tank from being discharged from the drying tank through the ventilation pipe, thus avoiding unnecessary loss of material.

[0023] Furthermore, the discharge pipe is connected to the bottom flange of the drying tank.

[0024] The flange connection is achieved by welding flanges on the discharge pipe and the bottom of the drying tank, and then fixing the two tightly with bolts, which can form a good sealing effect and effectively prevent material leakage.

[0025] Beneficial effects of the present invention: 1. The first scraper and the second scraper are driven by the gear ring to rotate along the moving groove. The special movement characteristics of the planetary gear are used to enable the first scraper and the second scraper to perform clockwise and counterclockwise circular scraping and brushing according to the rotation direction of the air supply pipe, avoiding dead corners for scraping and brushing, and effectively solving the problem of material sticking to the wall. With the cleaning ring, slide rail and fixed block of the scraper, the surface of the air outlet pipe can be cleaned up and down with the rotation of the first scraper and the air outlet pipe, ensuring that not only the inner wall of the drying tank is free of material residue, but also the surface of the air outlet pipe can be kept clean, further optimizing the overall scraping and cleaning effect, improving the thoroughness and efficiency of scraping, reducing the residual accumulation of materials inside the equipment, and thus avoiding the waste gas VOCs caused by material sticking to the wall attached to the residual dust, resulting in untimely treatment and failure to meet environmental protection requirements, thereby improving product quality.

[0026] 2. The slope design of the blocking block allows the knocking block to accumulate potential energy and knock on the bottom of the drying tank during the rotation of the scraper, loosening the materials that may be accumulated and agglomerated, ensuring smooth discharge; the vertical surface of the blocking block can control the first scraper and the second scraper to stop rotating, so that when the first scraper does not rotate and the air outlet pipe rotates, the cleaning ring can move upward faster, so that it can clean the surface of the air outlet pipe more quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of the environmentally friendly spray dryer; Figure 2 yes Figure 1 Enlarged view of part A.

[0028] Description of reference numerals: 1. drying tank; 101. bearing; 102. moving groove; 103. ventilation pipe; 104. filter screen; 105. slide groove; 106. discharge pipe; 107. bracket; 2. ring gear; 201. planetary gear; 202. sun gear; 203. first scraper; 204. brush; 205. slider; 206. spring; 207. second scraper; 208. knock block; 209. blocking block; 3. protective cover; 301. motor; 302. first large sprocket; 303. second large sprocket; 304 , chain; 305, second small sprocket; 306, rotary joint; 307, third large sprocket; 308, first small sprocket; 4, fixed block; 401, connecting rod; 402, cleaning ring; 403, slide rail; 5, air inlet pipe; 501, filter plate; 502, heating wire; 503, fan blade; 504, air supply pipe; 505, air outlet pipe; 506, air outlet; 6, feed tank; 601, infusion tube; 602, feed pipe; 603, atomizing nozzle; 604, booster pump; 7, air filter; 8, controller. DETAILED DESCRIPTION

[0029] The concept and technical effects of the present invention will be clearly and completely described below in conjunction with embodiments to fully understand the purpose, features and effects of the present invention.

[0030] like Figure 1 , 2The environmentally friendly spray dryer shown is characterized by comprising a drying tank 1, a bracket 107, a spray device, a drying device, a scraper device, a discharge pipe 106, a ventilation pipe 103, an air filter 7, and a controller 8. The main body of the drying tank 1 is a cylindrical tank, and its lower end is funnel-shaped. The bracket 107 is arranged below the drying tank 1, and the bracket 107 is fixedly connected to the side wall of the drying tank 1. The spray device is arranged on the drying tank 1, and is used to spray the mist material. The drying device is arranged on the drying tank 1, and is used to dry the mist material. The scraper device is arranged on the drying tank 1, and is used to scrape off the attached material. The discharge pipe 106 passes through the bottom of the drying tank 1, and the discharge pipe 106 is fixedly connected to the bottom of the drying tank 1, and is connected inside and outside. The ventilation pipe 103 passes through the side wall of the drying tank 1, and is connected inside and outside. The air filter 7 is arranged in the middle of the ventilation pipe 103. The controller 8 is arranged on the drying tank 1, and the controller 8 is electrically connected to the spray device and the drying device.

[0031] The material is first sent to the spray device, and the controller 8 starts the spray device. The spray device atomizes the material into tiny droplets to form mist material that is evenly sprayed in the drying tank 1; the drying device and the spray device work synchronously, and the drying device passes hot air into the drying tank 1. The hot air fully contacts the mist material to evaporate the water quickly, and the material gradually becomes solid particles. The solid particles fall to the bottom of the drying tank 1. When the material is dried, part of it will adhere to the inner wall of the tank. The scraper device is started, and the scraper device scrapes it off and returns to the bottom of the tank. After drying, the product particles are discharged from the drying tank 1 through the discharge pipe 106, completing the material collection work. During the entire drying process, the exhaust gas in the drying tank 1 is discharged from the drying tank 1 through the ventilation pipe 103, and the exhaust gas is filtered and purified by the air filter 7, which solves the problem that the exhaust gas VOCs caused by the material sticking to the wall adhere to the residual dust, and the resulting untimely treatment cannot meet the environmental protection requirements, thereby improving the recovery rate, efficiency and product quality.

[0032] The spray device includes a protective cover 3, a first large sprocket 302, a first small sprocket 308, a motor 301, a feed tank 6, a feed pipe 602, an infusion pipe 601, a pressure pump 604, and an atomizing nozzle 603. The protective cover 3 is arranged above the drying tank 1, and the protective cover 3 is fixedly connected to the top surface of the drying tank 1. The output shaft of the motor 301 is arranged vertically, the motor 301 is arranged above the drying tank 1, the motor 301 is arranged inside the protective cover 3, the motor 301 is fixedly connected to the top surface of the drying tank 1, and the motor 301 is electrically connected to the controller 8. The feed tank 6 is arranged on the side of the drying tank 1, and the feed tank 6 is fixedly connected to the bracket 107. The pressure pump 604 is arranged below the feed tank 6, and the pressure pump 604 is fixedly connected to the bottom of the feed tank 6, and is interconnected, and the pressure pump 604 is electrically connected to the controller 8. The feed pipe 602 is arranged vertically, and the feed pipe 602 runs through the top of the drying tank 1. The feed pipe 602 is rotatably connected to the top of the drying tank 1 through the bearing 101, and its rotation axis coincides with its own axis. The atomizing nozzle 603 is arranged inside the drying tank 1, and the atomizing nozzle 603 is arranged below the feed pipe 602. The atomizing nozzle 603 is fixedly connected to the lower end of the feed pipe 602 and is interconnected. The first large sprocket 302 is sleeved on the output shaft of the motor 301, and the first large sprocket 302 is fixedly connected to the output shaft of the motor 301. The first small sprocket 308 is sleeved on the feed pipe 602, and the first small sprocket 308 is fixedly connected to the feed pipe 602. The first large sprocket 302 and the first small sprocket 308 are connected by a chain 304 transmission. The infusion tube 601 passes through the side of the protective cover 3 , and the infusion tube 601 communicates with the pressure pump 604 and the feeding tube 602 . The infusion tube 601 is connected to the feeding tube 602 via a rotary joint 306 .

[0033] When the spray dryer starts working, first add materials into the feed tank 6, then control the booster pump 604 to start and the motor 301 to rotate forward and reverse through the controller 8, the output shaft of the motor 301 rotates forward to drive the first large sprocket 302 and the second large sprocket 303 to rotate forward, and the first large sprocket 302 and the chain 304 drive the first small sprocket 308 to rotate forward, the first small sprocket 308 rotates forward to drive the feed pipe 602 to rotate forward, and the feed pipe 602 rotates forward to drive the atomizing nozzle 603 to rotate forward, and at the same time the controller 8 controls the pressure pump 604 to start, and the material flows into the feed pipe 602 through the pressure pump 604 and the infusion pipe 601 under the action of gravity, and finally reaches the atomizing nozzle 603, and the atomizing nozzle 603 atomizes the material into a mist material. At this time, the atomizing nozzle 603 rotates forward, and the atomizing nozzle 603 atomizes the material into a mist material, so that the mist material is evenly spread in the drying tank 1 under the action of centrifugal force; the working process of the atomizing nozzle 603 rotating in the opposite direction is the same as above; it ensures that the atomizing nozzle 603 can stably provide the dryer with a mist material.

[0034] The motor 301 is connected to the top surface of the drying tank 1 by bolts.

[0035] During the production and assembly process of the spray dryer, workers can conveniently fix the motor 301 at a predetermined position on the top surface of the drying tank 1 by means of bolts, thereby improving production efficiency.

[0036] The drying device includes a second large sprocket 303, a third large sprocket 307, a second small sprocket 305, an air inlet pipe 5, an air supply pipe 504, an air outlet pipe 505, a plurality of air outlets 506, fan blades 503, a heating wire 502, and a filter plate 501. The axis of the air supply pipe 504 is arranged vertically and coincides with the center of the axis of the drying tank 1. The air supply pipe 504 runs through the top of the drying tank 1. The air supply pipe 504 is arranged inside the protective cover 3. The air supply pipe 504 is rotatably connected to the top of the drying tank 1 through a bearing 101, and its rotation axis coincides with its own axis. The third large sprocket 307 is sleeved on the air supply pipe 504, and the third large sprocket 307 is fixedly connected to the air supply pipe 504. The first large sprocket 302 and the third large sprocket 307 are connected by a chain 304. The air outlet pipe 505 is spiral-shaped, and its axis coincides with the axis of the air supply pipe 504. The air outlet pipe 505 is arranged inside the drying tank 1, and the air outlet pipe 505 is arranged below the air supply pipe 504. The air outlet pipe 505 is fixedly connected to the lower end of the air supply pipe 504 and is connected to each other. A plurality of air outlets 506 are evenly distributed on the inner side of the air outlet pipe 505, and are connected inside and outside. The axis of the air inlet pipe 5 coincides with the axis of the air supply pipe 504. The air inlet pipe 5 is funnel-shaped, and the lower end of the air inlet pipe 5 passes through the top of the protective cover 3. The lower end of the air inlet pipe 5 is connected to the air supply pipe 504 through a rotary joint 306. The second large sprocket 303 is sleeved on the output shaft, and the second large sprocket 303 is arranged above the first large sprocket 302. The second large sprocket 303 is fixedly connected to the output shaft of the motor 301. The second small sprocket 305 is sleeved on the lower end of the air inlet pipe 5, and the second small sprocket 305 is fixedly connected to the air inlet pipe 5. The second large sprocket 303 is connected to the second small sprocket 305 by a chain 304. The axis of the fan blade 503 coincides with the axis of the air inlet pipe 5. The fan blade 503 is arranged inside the air inlet pipe 5, and the fan blade 503 is fixedly connected to the inner wall of the air inlet pipe 5. The heating wire 502 is arranged above the fan blade 503, and the heating wire 502 is fixedly connected to the inner wall of the air inlet pipe 5. The heating wire 502 is electrically connected to the controller 8. The filter plate 501 is arranged above the heating wire 502, and the bottom surface of the filter plate 501 is fixedly connected to the air inlet pipe 5.

[0037] When the spray dryer starts to work, the output shaft of the motor 301 rotates forward to drive the first large sprocket 302 and the second large sprocket 303 to rotate forward, and the third large sprocket 307 is driven forward to rotate through the first large sprocket 302 and the chain 304, and the second small sprocket 305 is driven forward to rotate through the second large sprocket 303 and the chain 304, and the third large sprocket 307 rotates forward to drive the air supply pipe 504 to rotate forward, and the second small sprocket 305 rotates forward to drive the air inlet pipe 5 to rotate forward, and the air inlet pipe 5 rotates forward to drive the fan blade 503 to rotate forward, and the fan blade 503 rotates forward to suck the external air into the air inlet pipe 5, and the impurities and dust are filtered by the filter plate 501, and then heated by the heating wire 502, and the heated hot air enters the air supply pipe 504 through the air inlet pipe 5, and the air supply pipe 504 sends the hot air into the air outlet The positive rotation of the air supply pipe 504 drives the spiral air outlet pipe 505 and the sun gear 202 to rotate positively. The positive rotation of the air outlet pipe 505 drives the cleaning ring 402 to move downward in a spiral along the surface of the air outlet pipe 505. The positive rotation of the air outlet pipe 505 rotates and evenly sprays the hot air into the drying tank 1 through the plurality of air outlets 506 of the spiral air outlet pipe 505, thereby ensuring the uniform distribution of the hot air. At this time, the mist material is fully in contact with the hot air, and the moisture in the mist material evaporates rapidly to achieve drying; at this time, the mist material is dispersed in the drying tank 1, and the hot air is fully in contact with the mist material, and the moisture in the material evaporates rapidly, thereby realizing the drying process of the material, ensuring the uniform distribution of the hot air, providing a strong guarantee for the drying of the material, and improving the drying effect. The working process of the air outlet pipe 505 rotating in the opposite direction is the same as above.

[0038] The scraper device includes a moving groove 102, a gear ring 2, a sun gear 202, a planetary gear 201, a first scraper 203, a second scraper 207, a slide groove 105, a slider 205, a spring 206, and a brush 204. The moving groove 102 is an annular structure, and the moving groove 102 is arranged on the top of the inner wall of the drying tank 1. The axis of the gear ring 2 coincides with the axis of the drying tank 1, the gear ring 2 is arranged inside the drying tank 1, the gear ring 2 is arranged inside the moving groove 102, the gear ring 2 is rotatably connected to the moving groove 102, and its rotation axis coincides with its own axis. The sun gear 202 is sleeved on the air supply pipe 504, and the sun gear 202 is fixedly connected to the air supply pipe 504. The axis of the planetary gear 201 is parallel to the axis of the sun gear 202. The planetary gear 201 is arranged on the side of the sun gear 202 away from the feed pipe 602. The planetary gear 201, the sun gear 202 and the gear ring 2 are meshed with each other for transmission. The upper end of the planetary gear 201 is rotatably connected to the top surface of the drying tank 1 through a rotating shaft, and its axis coincides with its own axis. The first scraper 203 is made of elastic material, and the first scraper 203 is arranged vertically. The first scraper 203 is arranged below the gear ring 2, and the upper end of the first scraper 203 is fixedly connected to the bottom surface of the gear ring 2. The second scraper 207 is made of elastic material, and the second scraper 207 is inclined. The upper end of the second scraper 207 is fixedly connected to the lower end of the first scraper 203. The chute 105 is an annular structure with a T-shaped cross section. The chute 105 is arranged at the funnel-shaped connection of the drying tank 1. The slider 205 is arranged inside the chute 105, and the slider 205 is in close contact with the chute 105. The spring 206 is arranged on the side of the slider 205, one end of the spring 206 is fixedly connected to the connection between the first scraper 203 and the second scraper 207, and the other end of the spring 206 is fixedly connected to the side of the slider 205. The brushes 204 are evenly distributed on the side of the first scraper 203, the brushes 204 are fixedly connected to the side of the first scraper 203, and the brushes 204 are in contact with the inner wall of the drying tank 1.

[0039] Since the output shaft of the motor 301 performs periodic forward and reverse motion, the air supply pipe 504 rotates forward and reverse along with the forward and reverse rotation of the output shaft of the motor 301. The forward rotation of the sun gear 202 drives the planetary gear 201 to rotate in the reverse direction, and the reverse rotation of the planetary gear 201 drives the gear ring 2 to rotate forward along the moving groove 102. There is a speed difference between the forward rotation of the gear ring 2 and the forward rotation of the air outlet pipe 505. The forward rotation of the gear ring 2 drives the first scraper 203 to rotate forward, and the forward rotation of the first scraper 203 drives the second scraper 207 and the brush 204 to rotate forward. The first scraper 203 and the second scraper 207 rotate forward through the spring 206 to drive the slider 205 to rotate forward along the slide groove 105. The forward rotation of the first scraper 203 drives the brush 204 to rotate forward along the inner wall of the drying tank 1. The brush 204 rotates forward to clean the materials on the inner wall of the drying tank 1, and the second scraper 207 rotates forward. The forward rotation drives the knocking block 208 to rotate forward, and the second scraper 207 rotates forward and passes through the blocking block 209 to move upward along the slope. The upward movement of the second scraper 207 drives the spring 206 to extend, and the knocking block 208 climbs along the slope of the blocking block 209 to accumulate potential energy, and is pulled away from the slope by the spring 206, producing a knocking effect on the bottom surface of the drying tank 1 to loosen the bottom material and prevent accumulation and agglomeration; the reverse rotation of the first scraper 203 drives the brush 204 to rotate reversely along the inner wall of the drying tank 1, and the brush 204 rotates reversely to clean the material on the inner wall of the drying tank 1; the inner wall of the drying tank 1 is scraped back and forth by the first scraper 203 and the second scraper 207 to avoid scraping dead corners, effectively solving the problem of material sticking to the wall.

[0040] It includes a slide rail 403, a fixed block 4, a connecting rod 401, and a cleaning ring 402. The slide rail 403 is vertically arranged on the side of the first scraper 203 close to the air outlet pipe 505, and is fixedly connected to the first scraper 203. The fixed block 4 is arranged on the slide rail 403, and the fixed block 4 is slidably connected to the slide rail 403, and its sliding direction is perpendicular to the ground. The cleaning ring 402 is sleeved on the air outlet pipe 505, and the inner side of the cleaning ring 402 contacts the surface of the air outlet pipe 505. The cleaning ring 402 is fixedly connected to the side of the fixing block 4 through the connecting rod 401.

[0041] The positive rotation of the air outlet duct 505 drives the cleaning ring 402 to move downward in a spiral along the surface of the air outlet duct 505. The downward movement of the cleaning ring 402 drives the fixed block 4 to move downward along the slide rail 403. The cleaning ring 402 cleans the outer surface of the air outlet duct 505 and scrapes off attached materials; the second scraper 207 rotates in the opposite direction to the vertical surface of the blocking block 209, and the blocking block 209 blocks the second scraper 207 from continuing to rotate. At this time, the rotation of the air outlet duct 505 can make the cleaning ring 402 move upward faster. The reverse rotation of the air outlet duct 505 drives the cleaning ring 402 to move upward and drives the fixed block 4 to move upward along the slide rail 403. The cleaning ring 402 cleans the surface of the air outlet duct 505 again and scrapes off attached materials; the cleaning ring 402 moves up and down, and the surface of the air outlet duct 505 is repeatedly cleaned to keep the surface of the air outlet duct 505 clean, further optimizes the scraping effect, better solves the problem of material sticking to the wall, ensures that the entire drying process is not affected by material residues, and improves the working efficiency and product quality of the equipment.

[0042] It includes a blocking block 209 and a knocking block 208. One side of the blocking block 209 is sloped, and the blocking block 209 is arranged inside the drying tank 1, and the blocking block 209 is fixedly connected to the bottom surface of the drying tank 1. The knocking block 208 is arranged at the lower end of the second scraper 207, and the knocking block 208 is fixedly connected to the lower end of the second scraper 207, and the knocking block 208 contacts the bottom surface of the drying tank 1.

[0043] The second scraper 207 rotates forward and drives the knocking block 208 to rotate forward. The second scraper 207 rotates forward and moves upward along the slope through the blocking block 209. The upward movement of the second scraper 207 drives the spring 206 to extend. The knocking block 208 climbs along the slope of the blocking block 209 to accumulate potential energy. Under the pull of the spring 206, it breaks away from the slope and strikes the bottom surface of the drying tank 1 to loosen the bottom material and prevent it from accumulating and agglomerating. The second scraper 207 rotates in the opposite direction to the vertical surface of the blocking block 209. The blocking block 209 blocks the second scraper 207 from continuing to rotate. At this time, the air outlet pipe 505 rotates to make the cleaning ring 402 move upward faster.

[0044] The knocking block 208 is welded and fixed to the lower end of the second scraper 207 .

[0045] Welding can provide a very strong connection strength, ensuring that the striking block 208 will not become loose or fall off from the second scraper 207 during long-term and frequent operation.

[0046] The filter screen 104 is provided inside the ventilation pipe 103 and is fixedly connected to the air inlet of the ventilation pipe 103 .

[0047] During the drying process, some material particles tend to move toward the ventilation pipe 103. The filter screen 104 prevents the material in the drying tank 1 from being discharged from the drying tank 1 through the ventilation pipe 103, thereby avoiding unnecessary loss of the material.

[0048] The discharge pipe 106 is connected to the bottom flange of the drying tank 1 .

[0049] The flange connection is achieved by welding flanges between the discharge pipe 106 and the bottom of the drying tank 1, and then tightly fixing the two with bolts, so as to form a good sealing effect and effectively prevent material leakage.

[0050] Working principle: When the spray dryer starts working, firstly, materials are added into the feed tank 6, and then the controller 8 controls the heating wire 502, the pressure pump 604 to start, and the motor 301 to rotate forward and reverse; The output shaft of the motor 301 rotates forward to drive the first large sprocket 302 and the second large sprocket 303 to rotate forward, and the third large sprocket 307 and the first small sprocket 308 are driven forward through the first large sprocket 302 chain 304 transmission, and the second small sprocket 305 is driven forward through the second large sprocket 303 chain 304 transmission, and the first small sprocket 308 rotates forward to drive the feed pipe 602 to rotate forward, and the feed pipe 602 rotates forward to drive the atomizing nozzle 603 to rotate forward, and at the same time, the controller 8 controls the pressure pump 604 to start, and the material flows into the feed pipe 602 through the pressure pump 604 and the infusion tube 601 under the action of gravity, and finally reaches the atomizing nozzle 603, and the atomizing nozzle 603 atomizes the material into a mist material. At this time, the atomizing nozzle 603 rotates forward, and the atomizing nozzle 603 atomizes the material into a mist material, so that the mist material is evenly sprinkled in the drying tank 1 under the action of centrifugal force; The third large sprocket 307 rotates forward to drive the air supply pipe 504 to rotate forward, the second small sprocket 305 rotates forward to drive the air inlet pipe 5 to rotate forward, the air inlet pipe 5 rotates forward to drive the fan blade 503 to rotate forward, the fan blade 503 rotates forward to draw the external air into the air inlet pipe 5, the impurities and dust are filtered by the filter plate 501, and then the heated air is heated by the heating wire 502, the heated hot air enters the air supply pipe 504 through the air inlet pipe 5, and the air supply pipe 504 sends the hot air into the air outlet pipe 505 The air supply pipe 504 rotates forward to drive the spiral air outlet pipe 505 and the sun gear 202 to rotate forward. The air outlet pipe 505 rotates forward to drive the cleaning ring 402 to move downward along the surface of the air outlet pipe 505 in a spiral manner. The air outlet pipe 505 rotates forward to rotate and evenly spray the hot air into the drying tank 1 through the plurality of air outlets 506 of the spiral air outlet pipe 505, thereby ensuring the uniform distribution of the hot air. At this time, the mist material is fully in contact with the hot air, and the moisture in the mist material evaporates rapidly to achieve drying. The cleaning ring 402 moves downward and drives the fixed block 4 to move downward along the slide rail 403. The cleaning ring 402 cleans the outer surface of the air outlet pipe 505 and scrapes off the attached materials. The positive rotation of the sun gear 202 drives the planetary gear 201 to rotate in the opposite direction. The reverse rotation of the planetary gear 201 drives the gear ring 2 to rotate in the positive direction along the moving groove 102. There is a speed difference between the positive rotation of the gear ring 2 and the positive rotation of the air outlet pipe 505. The positive rotation of the gear ring 2 drives the first scraper 203 to rotate in the positive direction. The positive rotation of the first scraper 203 drives the second scraper 207 and the brush 204 to rotate in the positive direction. The first scraper 203 and the second scraper 207 rotate in the positive direction through the spring 206. The movable slider 205 rotates forward along the slide 105, the first scraper 203 rotates forward to drive the brush 204 to rotate forward along the inner wall of the drying tank 1, the brush 204 rotates forward to clean the materials on the inner wall of the drying tank 1, the second scraper 207 rotates forward to drive the knocking block 208 to rotate forward, the second scraper 207 rotates forward to pass the blocking block 209 and move upward along the slope, the second scraper 207 moves upward to drive the spring 206 to extend, the knocking block 208 climbs along the slope of the blocking block 209 to accumulate potential energy, and is pulled away from the slope by the spring 206, producing a knocking effect on the inner bottom surface of the drying tank 1, so that the materials at the bottom are loosened to prevent accumulation and agglomeration; The output shaft of the motor 301 rotates in the reverse direction to drive the first large sprocket 302 and the second large sprocket 303 to rotate in the reverse direction, and the chain 304 of the first large sprocket 302 drives the third large sprocket 307 and the first small sprocket 308 to rotate in the reverse direction, and the chain 304 of the second large sprocket 303 drives the second small sprocket 305 to rotate in the reverse direction; The working process of the atomizing nozzle 603 and the air outlet pipe 505 is the same as above; the air outlet pipe 505 rotates in the opposite direction to drive the cleaning ring 402 to move upward and drive the fixed block 4 to move upward along the slide rail 403, and the cleaning ring 402 cleans the surface of the air outlet pipe 505 again to scrape off the attached materials; the first scraper 203 rotates in the opposite direction to drive the brush 204 to rotate in the opposite direction along the inner wall of the drying tank 1, and the brush 204 rotates in the opposite direction to clean the materials on the inner wall of the drying tank 1; the second scraper 207 rotates in the opposite direction to the vertical surface of the blocking block 209, and the blocking block 209 blocks the second scraper 207 from continuing to rotate. At this time, the air outlet pipe 505 rotates to make the cleaning ring 402 move upward faster; the cleaning ring 402 moves up and down to keep the surface of the air outlet pipe 505 clean, further optimize the scraping effect, and the first scraper 203 rotates to drive the brush 204 to rotate along the inner wall of the drying tank 1 to scrape the side wall of the drying tank 1 back and forth, and scrape the side wall of the drying tank 1 back and forth to avoid scraping dead corners, effectively solving the problem of material sticking to the wall; It is ensured that there is no material residue on the inner wall of the drying tank 1, and even the surface of the air outlet pipe 505 can be kept clean, which further optimizes the overall scraping and cleaning effect, improves the thoroughness and efficiency of scraping, reduces the residual accumulation of materials inside the equipment, and thus avoids the waste gas VOCs caused by the material sticking to the wall adhering to the residual dust. The waste gas is discharged from the drying tank 1 through the ventilation pipe 103 through the filter screen 104. The filter screen 104 blocks the powdery material from entering the ventilation pipe 103. The waste gas discharged from the drying tank 1 is filtered by the air filter 7 to complete the waste gas discharge. The dried material is discharged from the drying tank 1 through the discharge pipe 106 to complete the drying operation.

[0051] The above embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work shall all fall within the scope of protection of the present invention.

Claims

1. An environmentally friendly spray dryer, characterized in that: The invention comprises a drying tank (1), a bracket (107), a spray device, a drying device, a scraper device, a discharge pipe (106), a ventilation pipe (103), an air filter (7), and a controller (8); the main body of the drying tank (1) is a cylindrical tank, and its lower end is funnel-shaped; the bracket (107) is arranged below the drying tank (1), and the bracket (107) is fixedly connected to the side wall of the drying tank (1); the spray device is arranged on the drying tank (1) and is used to spray mist materials; the drying device is arranged on the drying tank (1) and is used to The material is dried; the scraping device is arranged on the drying tank (1) and is used to scrape off the attached material; the discharge pipe (106) passes through the bottom of the drying tank (1), the discharge pipe (106) is fixedly connected to the bottom of the drying tank (1), and the inside and outside are connected; the ventilation pipe (103) passes through the side wall of the drying tank (1), and the inside and outside are connected; the air filter (7) is arranged in the middle of the ventilation pipe (103); the controller (8) is arranged on the drying tank (1), and the controller (8) is electrically connected to the spray device and the drying device.

2. An environmentally friendly spray dryer according to claim 1, characterized in that: The spray device comprises a protective cover (3), a first large sprocket (302), a first small sprocket (308), a motor (301), a feed tank (6), a feed pipe (602), an infusion pipe (601), a pressure pump (604), and an atomizing nozzle (603); the protective cover (3) is arranged above the drying tank (1), and the protective cover (3) is fixedly connected to the top surface of the drying tank (1); the output shaft of the motor (301) is arranged vertically, the motor (301) is arranged above the drying tank (1), and the motor (301) is arranged inside the protective cover (3), The motor (301) is fixedly connected to the top surface of the drying tank (1), and the motor (301) is electrically connected to the controller (8); the feed tank (6) is arranged on the side of the drying tank (1), and the feed tank (6) is fixedly connected to the bracket (107); the booster pump (604) is arranged below the feed tank (6), and the booster pump (604) is fixedly connected to the bottom of the feed tank (6), and they are interconnected, and the booster pump (604) is electrically connected to the controller (8); the feed pipe (602) is arranged vertically, and the feed pipe (602) The feed pipe (602) runs through the top of the drying tank (1), and is rotatably connected to the top of the drying tank (1) through a bearing (101), and its rotation axis coincides with its own axis; the atomizing nozzle (603) is arranged inside the drying tank (1), and the atomizing nozzle (603) is arranged below the feed pipe (602), and the atomizing nozzle (603) is fixedly connected to the lower end of the feed pipe (602) and communicated with each other; the first large sprocket (302) is sleeved on the output shaft of the motor (301), and the first large sprocket (302) is connected to the motor (301). 1) the output shaft is fixedly connected; the first small sprocket (308) is sleeved on the feed pipe (602), and the first small sprocket (308) is fixedly connected to the feed pipe (602); the first large sprocket (302) and the first small sprocket (308) are connected by a chain (304); the infusion tube (601) passes through the side of the protective cover (3), the infusion tube (601) connects the booster pump (604) and the feed pipe (602), and the infusion tube (601) is connected to the feed pipe (602) through a rotating joint (306).

3. An environmentally friendly spray dryer according to claim 2, characterized in that: The motor (301) is bolted to the top surface of the drying tank (1).

4. An environmentally friendly spray dryer according to claim 2, characterized in that: The drying device comprises a second large sprocket (303), a third large sprocket (307), a second small sprocket (305), an air inlet pipe (5), an air supply pipe (504), an air outlet pipe (505), a plurality of air outlets (506), fan blades (503), a heating wire (502), and a filter plate (501); the axis of the air supply pipe (504) is arranged vertically and coincides with the center of the axis of the drying tank (1); the air supply pipe (504) passes through the top of the drying tank (1); the air supply pipe (504) is arranged inside the protective cover (3); the air supply pipe (504) is rotatably connected to the top of the drying tank (1) through a bearing (101), and its rotation axis coincides with its own axis; the third large sprocket ( The third large sprocket (307) is sleeved on the air supply pipe (504), and the third large sprocket (307) is fixedly connected to the air supply pipe (504); the first large sprocket (302) and the third large sprocket (307) are connected by a chain (304); the air outlet pipe (505) is spiral, and its axis coincides with the axis of the air supply pipe (504); the air outlet pipe (505) is arranged inside the drying tank (1), and the air outlet pipe (505) is arranged below the air supply pipe (504); the air outlet pipe (505) is fixedly connected to the lower end of the air supply pipe (504), and they are connected to each other; a plurality of air outlets (506) are evenly distributed on the inner side of the air outlet pipe (505), and the inside and outside are connected. ; The axis of the air inlet pipe (5) coincides with the axis of the air supply pipe (504); the air inlet pipe (5) is funnel-shaped; the lower end of the air inlet pipe (5) passes through the top of the protective cover (3); the lower end of the air inlet pipe (5) is connected to the air supply pipe (504) via a rotary joint (306); the second large sprocket (303) is sleeved on the output shaft; the second large sprocket (303) is arranged above the first large sprocket (302); the second large sprocket (303) is fixedly connected to the output shaft of the motor (301); the second small sprocket (305) is sleeved on the lower end of the air inlet pipe (5); the second small sprocket (305) is fixedly connected to the air inlet pipe (5); the second large sprocket ( The fan blade (503) is connected to the second small sprocket (305) by a chain (304); the axis of the fan blade (503) coincides with the axis of the air inlet pipe (5), the fan blade (503) is arranged inside the air inlet pipe (5), and the fan blade (503) is fixedly connected to the inner wall of the air inlet pipe (5); the heating wire (502) is arranged above the fan blade (503), the heating wire (502) is fixedly connected to the inner wall of the air inlet pipe (5), and the heating wire (502) is electrically connected to the controller (8); the filter plate (501) is arranged above the heating wire (502), and the bottom surface of the filter plate (501) is fixedly connected to the air inlet pipe (5).

5. An environmentally friendly spray dryer according to claim 4, characterized in that: The scraping device comprises a movable groove (102), a gear ring (2), a sun gear (202), a planetary gear (201), a first scraper (203), a second scraper (207), a slide groove (105), a slider (205), a spring (206), and a brush (204); the movable groove (102) is an annular structure, and the movable groove (102) is arranged at the top of the inner wall of the drying tank (1); the axis of the gear ring (2) coincides with the axis of the drying tank (1), the gear ring (2) is arranged inside the drying tank (1), the gear ring (2) is arranged inside the movable groove (102), and the gear ring (2) and the drying tank (1) are connected to each other. The movable groove (102) is rotatably connected, and its rotation axis coincides with its own axis; the sun gear (202) is sleeved on the air supply pipe (504), and the sun gear (202) is fixedly connected to the air supply pipe (504); the axis of the planetary gear (201) is parallel to the axis of the sun gear (202), and the planetary gear (201) is arranged on the side of the sun gear (202) away from the feed pipe (602), and the planetary gear (201) is meshed with the sun gear (202) and the ring gear (2) for transmission, and the upper end of the planetary gear (201) is rotatably connected to the inner top surface of the drying tank (1) through a rotating shaft, and its axis The first scraper (203) is made of elastic material, the first scraper (203) is arranged vertically, the first scraper (203) is arranged below the gear ring (2), and the upper end of the first scraper (203) is fixedly connected to the bottom surface of the gear ring (2); the second scraper (207) is made of elastic material, the second scraper (207) is arranged obliquely, and the upper end of the second scraper (207) is fixedly connected to the lower end of the first scraper (203); the slide groove (105) is an annular structure with a T-shaped cross section, and the slide groove (105) is arranged at the funnel-shaped connection of the drying tank (1); the slider (2 05) is arranged inside the slide groove (105), and the slider (205) is in close contact with the slide groove (105); the spring (206) is arranged on the side of the slider (205), one end of the spring (206) is fixedly connected to the connection between the first scraper (203) and the second scraper (207), and the other end of the spring (206) is fixedly connected to the side of the slider (205); the brush (204) is evenly distributed on the side of the first scraper (203), the brush (204) is fixedly connected to the side of the first scraper (203), and the brush (204) is in contact with the inner wall of the drying tank (1).

6. An environmentally friendly spray dryer according to claim 5, characterized in that: The invention comprises a slide rail (403), a fixed block (4), a connecting rod (401), and a cleaning ring (402); the slide rail (403) is vertically arranged on the side of the first scraper (203) close to the air outlet pipe (505), and is fixedly connected to the first scraper (203); the fixed block (4) is arranged on the slide rail (403), and the fixed block (4) is slidably connected to the slide rail (403), and its sliding direction is perpendicular to the ground; the cleaning ring (402) is sleeved on the air outlet pipe (505), and the inner side of the cleaning ring (402) contacts the surface of the air outlet pipe (505), and the cleaning ring (402) is fixedly connected to the side of the fixed block (4) through the connecting rod (401).

7. The environmentally friendly spray dryer according to claim 5, characterized in that: The invention comprises a blocking block (209) and a knocking block (208); one side of the blocking block (209) is in a slope shape; the blocking block (209) is arranged inside the drying tank (1); the blocking block (209) is fixedly connected to the bottom surface of the inside of the drying tank (1); the knocking block (208) is arranged at the lower end of the second scraper (207); the knocking block (208) is fixedly connected to the lower end of the second scraper (207); the knocking block (208) is in contact with the bottom surface of the inside of the drying tank (1).

8. An environmentally friendly spray dryer according to claim 7, characterized in that: The knocking block (208) is welded and fixed to the lower end of the second scraper (207).

9. The environmentally friendly spray dryer according to claim 1, characterized in that: It comprises a filter screen (104); the filter screen (104) is arranged inside the ventilation pipe (103), and the filter screen (104) is fixedly connected to the air inlet of the ventilation pipe (103).

10. The environmentally friendly spray dryer according to claim 1, characterized in that: The discharge pipe (106) is connected to the bottom flange of the drying tank (1).

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