Drying device for urea resin production

Abstract

The invention relates to the technical field of urea-formaldehyde resin drying, in particular to a drying device for urea-formaldehyde resin production, which comprises a machine body, a collecting box is arranged at the bottom of the machine body, and a spray dryer and a separator are respectively arranged on the collecting box and are communicated through an air inducing pipe; the collection box can collect particles discharged by the spray dryer and the separator in a classified manner; and the spray dryer comprises a drying tower. The scraping rod moves against the wind relative to the airflow on the inner wall of the drying tower, the driving part drives the scraping rod to scrape, sweep and remove adhered large particles along the wall of the drying tower after spraying is finished, when the scraping rod and the guide rod are combined to form the hollow air guide pipeline, the pressure difference in the drying tower is utilized, and the scraping rod is driven by the driving part to scrape, sweep and remove the large particles. By means of the structure, airflow enters from the top and is discharged at a high speed through the bottom, large particles are discharged into the collecting box through the discharging pipe under inertia and self weight to be collected, classified collection of urea resin with different particle sizes is achieved, and the purity and consistency of products are improved.

Description

Technical Field

[0001] The invention relates to the technical field of urea-formaldehyde resin drying, in particular to a drying device for urea-formaldehyde resin production. Background Art

[0002] Urea-formaldehyde resin (UF resin) is an important thermosetting plastic. It is widely used in wood processing industries such as plywood, particleboard, fiberboard, and molded products due to its excellent bonding properties, good water resistance, and low cost. In the production process of urea-formaldehyde resin, drying is a crucial step. Through effective drying treatment, the moisture in the product can be removed to ensure the quality of the final product is stable and meet the requirements of subsequent processing or use. Since it is difficult to keep the atomized droplets sprayed by the nozzle absolutely uniform, the larger droplets have a short contact time and condense into lumps before they are fully evaporated. They adhere to the wall of the dryer and gradually accumulate into large particles. Patent No. CN202121651664.6 is a spray drying tower for iron p-toluenesulfonate, comprising a drying tower, wherein two opposite sides of the inner wall of the drying tower are rotatably connected to a screw through a first fixed plate, and the outer walls of the two screws are provided with the same scraper; When the above patent is in use, when the scraper scrapes off large particles, the scraped large particles will enter the material box together with normal-sized particles along with the airflow and cannot be collected separately; thus, it is difficult to ensure the purity and consistency of the product. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a drying device for urea-formaldehyde resin production to solve the problem that large particles scraped off by a scraper in the drying device will enter the material box together with normal-sized particles along with the airflow and cannot be classified and collected.

[0004] Based on the above purpose, the present invention provides a drying device for urea-formaldehyde resin production, comprising a body, a collecting box is arranged at the bottom of the body, a spray dryer and a separator are arranged on the collecting box respectively, and the two are connected through an air duct, and the collecting box can classify and collect particles discharged by the spray dryer and the separator; the spray dryer comprises a drying tower, one side of the drying tower is connected to an air inlet pipe connected to a hot air pump in the body, and the air inlet pipe is arranged tangentially to the drying tower; the bottom of the drying tower is connected to a discharge pipe for discharging materials into the collecting box; the top of the drying tower is provided with a nozzle, and the nozzle is connected to a nozzle connected to a creeping air pump inside the body A water pipe connected to a driving pump is provided, a hollow rotating ring is rotatably arranged at the top center of the drying tower, at least two groups of cross arms are arranged on the outer periphery of the hollow rotating ring, and scraping rods for scraping the inner wall of the drying tower are arranged at the ends of the cross arms; at least two groups of guide rods are arranged on the inner wall of the drying tower, the tops of the guide rods and the scraping rods are located at the bottom of the air inlet pipe, and the bottoms of the two are located at the bottom of the air induced pipe; a sealing plate perpendicular to the guide rod is arranged at one end of the guide rod away from the drying tower, and the sealing plate extends to both sides of the guide rod so that the guide rod is T-shaped as a whole; a driving part for driving the hollow rotating ring to reciprocate is also provided on the drying tower; The driving part drives the scraper rod to move to scrape the inner wall of the drying tower and abut against the sealing plate on the guide rod. The two form a hollow air duct. The airflow enters from the top of the air duct and is discharged from the bottom of the air duct to discharge the large particles scraped by the scraper rod at high speed. The large particles are discharged into the collection box through the discharge pipe due to inertia and self-weight for collection.

[0005] Furthermore, wing plates perpendicular to the scraper rod are respectively arranged on both sides of the scraper rod, and fine holes are opened on the wing plates, through which fine particles can be discharged, and the length of the wing plates is smaller than the length of the sealing plate extending to the guide rod.

[0006] Furthermore, the separator is arranged tangentially to the induced draft duct, and an exhaust pipe connected to the suction pump in the fuselage is arranged on the top of the separator; a separation component for separating fine particles is arranged at the bottom of the exhaust pipe, and the fine particles separated by the separation component are introduced into a collection box for collection.

[0007] Further, the separation assembly includes a separation box with an opening at one end, the separation box is arranged at the bottom end of the exhaust pipe and is connected to the exhaust pipe, a filter plate is rotatably arranged in the separation box, and a right partition and a left partition are symmetrically arranged on both sides of the filter plate, the two partitions are respectively fixedly connected to the inner wall of the separation box and divide the separation box from top to bottom into a filter chamber and a discharge chamber, and a cover plate is arranged at the left end of the discharge chamber to seal the discharge chamber; wherein, an ash discharge channel is formed at a spacing between the left partition plate and the filter plate, and the right partition plate is abutted against the filter plate; a driving assembly for driving the filter plate to rotate is arranged in the separation box; a first exhaust pipe is arranged on one side of the separation box, the top of the first exhaust pipe is connected to the exhaust pipe, and the bottom is connected to the discharge chamber; a second exhaust pipe is arranged on the other side of the separation box, the top of the second exhaust pipe is connected to the discharge chamber, and the other end is connected to a collecting box, and a suction part is arranged in the collecting box to form a negative pressure in the second exhaust pipe.

[0008] Furthermore, two groups of partitions are provided in the collecting box, and the two groups of partitions divide the collecting box into a large particle chamber, a conventional particle chamber and a fine particle chamber from right to left in sequence; wherein the large particle chamber is connected to the discharge pipe to collect large particles discharged from the drying tower, the conventional particle chamber is connected to the separator to collect particles discharged from the separator, and the fine particle chamber is connected to the second exhaust pipe to collect fine particles separated by the separation component.

[0009] Furthermore, the suction part includes an air pump, which is arranged on one side of the collection box, and the air inlet of the air pump is connected to the fine particle chamber; a dust filter bag is also arranged in the fine particle chamber to prevent fine particles from being discharged outward through the air pump.

[0010] Further, the driving assembly includes a convex plate, which is arranged on one side of the first exhaust pipe and is connected to the first exhaust pipe, a shaft is rotatably arranged in the convex plate, a fan blade is arranged on the shaft, and the fan blade extends outward into the first exhaust pipe, a first gear is rotatably arranged on the convex plate, and the first gear is fixedly connected to the shaft; a transmission rod is rotatably arranged on the separation box, a third gear is fixedly arranged at one end of the transmission rod, and a second gear meshing with the first gear is fixedly arranged at the other end; The filter plate comprises an outer ring which is rotatably arranged on the inner wall of the separation box, and a filter screen is arranged between the inner walls of the outer ring; and a tooth groove which meshes with the third gear is also arranged on the inner periphery of the outer ring.

[0011] Furthermore, a cleaning portion for cleaning the filter plate is also provided in the separation box.

[0012] Furthermore, the cleaning part includes a bracket, which is arranged between the filter plate and the cover plate and fixedly installed at the bottom of the inner cavity of the separation box. A support rod is rotatably arranged at the end of the bracket, and a rotating tooth is fixedly connected to the end of the support rod close to the filter plate. A lower bevel gear is fixedly sleeved on the support rod, and a roller shaft is rotatably arranged at the bottom of the left partition plate. An upper bevel gear meshing with the lower bevel gear is fixedly arranged at the bottom of the roller shaft, and a cleaning roller for scraping the filter plate is sleeved on the roller shaft.

[0013] Furthermore, the driving part includes a driving rod, the top end of which is connected to a driving motor inside the fuselage, the bottom of which is fixedly connected to a driving gear, and the outer peripheral fixed sleeve of the hollow rotating ring is provided with a driven gear meshing with the driving gear.

[0014] The beneficial effects of the present invention are as follows: the scraper rod is arranged to move against the wind relative to the air flow on the inner wall of the drying tower. When the drying operation is completed and the hot air blower is operated to discharge the moisture in the drying tower, the drive unit drives the scraper rod to scrape along the wall of the drying tower to remove the adhered large particles. When the scraper rod and the guide rod are combined to form a hollow air guide duct, the pressure difference inside the drying tower is utilized, so that the air flow enters from the top and is discharged at high speed through the bottom. The large particles are discharged into the collection box through the discharge pipe due to inertia and self-weight, and at the same time, the fine particles accumulated on the large particles will diffuse outward with the air flow and be introduced into the induced draft duct with the air flow for classified collection, thereby realizing the classified collection of urea-formaldehyde resins of different particle sizes and improving the purity and consistency of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or 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 in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the first viewing angle of an embodiment of the present invention; Figure 2 It is a schematic diagram of the main structure of an embodiment of the present invention; Figure 3 It is a schematic diagram of a partial cross-sectional structure of the drying tower according to an embodiment of the present invention; Figure 4 For the embodiment of the present invention Figure 3 A is a schematic diagram of the enlarged structure of the middle part; Figure 5 This is a schematic diagram of the scraper structure of an embodiment of the present invention; Figure 6 This is a schematic diagram of the guide rod structure of an embodiment of the present invention; Figure 7 It is a schematic diagram of a partial cross-sectional structure of the separator according to an embodiment of the present invention; Figure 8 For the embodiment of the present invention Figure 7 Schematic diagram of the enlarged structure of B; Fig. 9 This is a schematic diagram of the front and cross-sectional structure of the separation box according to an embodiment of the present invention; Fig.10 For the embodiment of the present invention Fig. 9 Schematic diagram of the enlarged structure of C in the middle; Fig.11 Schematic diagram of the rotating gear position structure of an embodiment of the present invention Fig.12 It is a schematic diagram of a partial cross-sectional structure of the separation box in a first viewing angle according to an embodiment of the present invention; Fig.13 For the embodiment of the present invention Fig.12 Schematic diagram of the enlarged structure of D in the middle; Fig.14 This is a schematic structural diagram of the separation box from a second viewing angle according to an embodiment of the present invention; Fig.15 This is a schematic diagram of the internal structure of the collection box according to an embodiment of the present invention.

[0017] The markings in the figure are: 1. Fuselage; 2. Collection box; 201. Large particle chamber; 202. Conventional particle chamber; 203. Fine particle chamber; 204. Dust filter bag; 205. Vacuum pump; 3. Spray dryer; 301. Drying tower; 302. Feeding pipe; 303. Nozzle; 304. Air inlet pipe; 305. Water pipe; 4. Separator; 401. Exhaust pipe; 5. Hollow swivel; 501. Cross arm; 6. Scraper rod; 601. Wing plate; 7. Guide rod; 701. Sealing plate; 8. Driving rod; 801. Driving gear; 802. Driven gear; 9. Air duct; 10. Separation box; 1001. Filter plate; 10 011, outer ring; 10012, filter; 1002, right partition; 1003, left partition; 1004, first exhaust duct; 1005, cover plate; 11, drive assembly; 1101, convex plate; 1102, shaft; 1103, fan blade; 1104, first gear; 1105, transmission rod; 1106, second gear; 1107, third gear; 12, second exhaust duct; 13, cleaning unit; 1301, bracket; 1302, support rod; 1303, lower bevel gear; 1304, roller shaft; 1305, upper bevel gear; 1306, cleaning roller; 1307, rotating tooth. DETAILED DESCRIPTION

[0018] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0019] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 , Fig.14 , Fig.15As shown, a drying device for urea-formaldehyde resin production includes a body 1, a suction pump for exhausting to the outside, a hot air pump for conveying hot air, and a peristaltic pump connected to an external container containing urea-formaldehyde resin liquid is arranged in the body 1, a collecting box 2 is arranged at the bottom of the body 1, a spray dryer 3 and a separator 4 are arranged on the collecting box 2 respectively, and the two are connected through an air duct 9, and the collecting box 2 can classify and collect particles discharged by the spray dryer 3 and the separator 4; the spray dryer 3 includes a drying tower 301, one side of the drying tower 301 is connected to an air inlet pipe 304 connected to the hot air pump in the body 1, and the air inlet pipe 304 is tangentially arranged to the drying tower 301; the bottom of the drying tower 301 is connected to a discharge pipe 302 for discharging materials into the collecting box 2; the top of the drying tower 301 is provided with a nozzle 303, and the nozzle 303 is connected to a nozzle 304 connected to the inside of the body 1 A water pipe 305 connected to a peristaltic pump, a hollow rotating ring 5 is rotatably provided at the top center of the drying tower 301, the water pipe 305 passes through the inside of the hollow rotating ring 5 to the top of the drying tower 301, the water pipe 305 is rotatably connected to the hollow rotating ring 5, at least two groups of cross arms 501 are provided on the outer periphery of the hollow rotating ring 5, and scraping rods 6 for scraping the inner wall of the drying tower 301 are provided at the ends of the cross arms 501; at least two groups of guide rods 7 are provided on the inner wall of the drying tower 301, the tops of the guide rods 7 and the scraping rods 6 are located at the bottom of the air inlet pipe 304, and the bottoms of the two are located at the bottom of the air duct 9; a sealing plate 701 perpendicular to the guide rod 7 is provided at one end of the guide rod 7 away from the drying tower 301, and the sealing plate 701 extends to both sides of the guide rod 7 so that the guide rod 7 is T-shaped as a whole; a driving part for driving the hollow rotating ring 5 to reciprocate is also provided on the drying tower 301; The driving unit drives the scraper rod 6 to move to scrape the inner wall of the drying tower 301 and abut against the sealing plate 701 on the guide rod 7. The two form a hollow air duct. The airflow enters from the top of the air duct and is discharged from the bottom of the air duct to discharge the large particles scraped by the scraper rod 6 at high speed. The large particles are discharged into the collection box 2 through the discharge pipe 302 due to inertia and self-weight for collection.

[0021] In this embodiment, the hot air pump in the fuselage 1 inputs hot air into the drying tower 301 through the air inlet pipe 304, so that the temperature in the drying tower 301 rises to 140 degrees Celsius; the spray pressure of the nozzle 303 is adjusted to 0.6~0.8MPa; the peristaltic pump pumps the urea-formaldehyde resin solution into the water pipe 305 and sprays it into the drying tower 301 through the nozzle 303 in atomization, and the water in the atomized urea-formaldehyde resin solution evaporates rapidly to form urea-formaldehyde resin particles; the vacuum pump 205 in the fuselage 1 operates to form a negative pressure in the separator 4, and the air flow carrying the urea-formaldehyde resin particles is introduced into the separator 4 through the air duct 9 for solid-gas separation, and the separated solid particles are introduced into the collection box 2 for collection; It is difficult to keep the atomized droplets sprayed from the nozzle 303 uniform. The larger droplets are in contact with the hot air for a short time, and the water cannot be completely evaporated, causing the sprayed urea-formaldehyde resin to be flocculent or even thin. At this time, the sprayed product contains water that has not been completely evaporated. After contacting the dryer tube wall, it adheres to the wall of the drying tower 301 and accumulates together. After the water gradually evaporates to form large particles; The air inlet pipe 304 is arranged tangentially to the drying tower 301, so that the hot air entering the drying tower 301 will rotate downward along the tower wall to the air duct 9, and continuously evaporate the water in the flocs adhering to the wall of the drying tower 301; when the drying operation is completed, after the peristaltic pump is turned off to stop the material supply and the nozzle 303 is turned off, the hot air pump needs to continue to run for a period of time to completely discharge the remaining moisture in the drying tower 301; in this process, the drive unit is used to drive the scraper rod 6 to move against the wind to scrape the wall of the drying tower 301 to scrape off large particles; the hot air rotating along the tower wall acts on the scraper rod 6 in a nearly vertical direction, and at this time, the wind force acting on the scraper rod 6 can press the scraped large particles onto the scraper rod 6; when the scraper rod 6 moves to abut against the guide rod 7, the scraper rod 6 and the guide rod 7 are combined to form a hollow air guide duct. At this time, affected by the pressure difference inside the drying tower 301, the airflow enters from the top of the air guide duct and then moves from the guide The air is discharged from the bottom of the air duct and large particles are discharged at high speed. Due to inertia and self-weight, the large particles are discharged into the collection box 2 through the discharge pipe 302 for collection; at the same time, the large particles will protrude from the tower wall when adsorbed on the tower wall, and the two sides of the protrusion will block some fine particles from passing through and accumulating. When the large particles are scraped off by the scraper 6, the fine particles will diffuse outward with the air flow and be introduced into the induced draft pipe 9 with the air flow, thereby realizing the classified collection of urea-formaldehyde resin of different particle sizes; after confirming that the moisture in the drying tower 301 has been fully eliminated, the hot air pump is turned off, and the driving unit reversely drives the scraper 6 to rotate and reset. In this process, the scraper 6 scrapes the tower wall again, and the large particles after scraping fall directly into the collection box 2 only under the influence of gravity; the separated large pieces of urea-formaldehyde resin can be reused through appropriate crushing or reprocessing, and converted into small particles that meet the standards, thereby reducing the waste of raw materials and reducing production costs.

[0022] Preferably, wing plates 601 perpendicular to the scraper rod 6 are respectively provided on both sides of the scraper rod 6. The scraped large particles will accumulate on the wing plates 601. Fine holes are opened on the wing plates 601. In the process of the scraper rod 6 moving the guide rod 7, the scraped particles will slowly move downward. In the downward movement, fine particles can be discharged through the fine holes, so that the small particles contained in the scraped large particles are discharged from the wing plates 601. The discharged small particles are discharged outward through the air duct 9. The length of the wing plate 601 is smaller than the length of the sealing plate 701 extending to the guide rod 7. When the scraper rod 6 and the guide rod 7 are combined into an air guide channel, the wing plate 601 is in the air guide channel.

[0023] Preferably, the separator 4 is arranged tangentially to the induced draft pipe 9, and an exhaust pipe 401 connected to the suction pump in the fuselage 1 is arranged at the top of the separator 4; a separation component for separating fine particles is arranged at the bottom of the exhaust pipe 401, and the fine particles separated by the separation component are introduced into the collection box 2 for collection; The operation of the suction pump in the fuselage 1 forms a negative pressure in the exhaust pipe 401, and the airflow carrying the particles enters the separator 4 tangentially through the air duct 9. The solid particles are affected by the centrifugal force and move along the inner wall of the suction pump 205 and separate from the gas. The separated solid particles fall downward into the collection box 2 for collection. The separation component introduces the separated fine particles into the collection box 2 for collection, thereby completing the re-classification and collection of urea-formaldehyde resin particles of different sizes.

[0024] Preferably, the separation assembly includes a separation box 10 with an opening at one end, the separation box 10 is arranged at the bottom end of the exhaust pipe 401 and is connected to the exhaust pipe 401, a filter plate 1001 is rotatably arranged in the separation box 10, and a right partition plate 1002 and a left partition plate 1003 are symmetrically arranged on both sides of the filter plate 1001, and the two partition plates are respectively fixedly connected to the inner wall of the separation box 10 and divide the separation box 10 from top to bottom into a filter chamber and a discharge chamber, and a cover plate 1005 is arranged at the left end of the discharge chamber to seal the discharge chamber; wherein, a space is set between the left partition plate 1003 and the filter plate 1001 An ash discharge channel is formed at the interval, and the right partition 1002 is arranged in abutment with the filter plate 1001; a driving component 11 for driving the filter plate 1001 to rotate is arranged in the separation box 10; a first exhaust pipe 1004 is arranged on one side of the separation box 10, and the top of the first exhaust pipe 1004 is connected to the exhaust pipe 401, and the bottom is connected to the discharge cavity; a second exhaust pipe 12 is arranged on the other side of the separation box 10, and the top of the second exhaust pipe 12 is connected to the discharge cavity, and the other end is connected to the collection box 2, and a suction part is arranged in the collection box 2 to form a negative pressure in the second exhaust pipe 12.

[0025] In this embodiment, due to the negative pressure formed in the exhaust pipe 401, the airflow in the separator 4 will enter the exhaust pipe 401 through the filter cavity on the separation box 10 and be discharged outward through the suction pump in the fuselage 1; the filter plate 1001 on the separation box 10 can filter out the fine particles carried in the airflow, and the filtered fine particles will be adsorbed on the filter plate 1001 under the influence of the airflow; the operation of the suction part causes a negative pressure to be formed in the second exhaust pipe 12, so that the exhaust cavity connected to the second exhaust pipe 12 forms a negative pressure, and the exhaust pipe 4 Part of the airflow in 01 will enter the discharge chamber through the first exhaust pipe 1004 and flow into the second exhaust pipe 12, so that the airflow directions in the discharge chamber and the filter chamber are opposite; the driving component 11 drives the filter plate 1001 to rotate, and the fine particles adsorbed on the filter plate 1001 will rotate with the filter plate 1001 into the discharge chamber. At this time, the airflow flowing in the discharge chamber can blow the fine particles adsorbed on the filter plate 1001 out to the second exhaust pipe 12, and enter the collection box 2 through the second exhaust pipe 12 for collection.

[0026] Preferably, two groups of partitions are provided in the collecting box 2, and the two groups of partitions divide the collecting box 2 from right to left into a large particle chamber 201, a conventional particle chamber 202 and a fine particle chamber 203, and the front sides of the three are respectively provided with material taking doors to facilitate workers to take materials; wherein, the large particle chamber 201 is connected to the discharge pipe 302 to collect large particles discharged from the drying tower 301, the conventional particle chamber 202 is connected to the separator 4 to collect particles discharged from the separator 4, and the fine particle chamber 203 is connected to the second exhaust pipe 12 to collect fine particles separated by the separation component.

[0027] Preferably, the suction part includes an air pump 205, which is arranged on a side of the collecting box 2, and the air inlet of the air pump 205 is connected to the fine particle chamber 203, so as to form a negative pressure in the fine particle chamber 203; a dust filter bag 204 is also arranged in the fine particle chamber 203, and part of the gas in the filter chamber will also directly enter the discharge chamber through the ash discharge channel, and the dust filter bag 204 can also directly filter the fine particles in the air discharged from the ash discharge channel, and also prevent the fine particles from being discharged outwardly through the air pump 205, so that the fine particles are collected in the fine particle chamber 203; the operation of the air pump 205 will form a negative pressure in the fine particle chamber 203, and the airflow flowing in the discharge chamber can blow the fine particles adsorbed on the filter plate 1001 into the second exhaust pipe 12, and enter the fine particle chamber 203 through the second exhaust pipe 12 for collection, thereby further realizing the classified collection of particles of different sizes by the device.

[0028] Preferably, the driving assembly 11 includes a convex plate 1101, which is arranged on one side of the first exhaust pipe 1004 and is connected to the first exhaust pipe 1004, a shaft 1102 is rotatably arranged in the convex plate 1101, a fan blade 1103 is arranged on the shaft 1102, and the fan blade 1103 extends outward into the first exhaust pipe 1004, a first gear 1104 is rotatably arranged on the convex plate 1101, and the first gear 1104 is fixedly connected to the shaft 1102, and the rotation of the shaft 1102 will drive the first gear 1104 to rotate synchronously; a transmission rod 1105 is rotatably arranged on the separation box 10, one end of the transmission rod 1105 is fixedly arranged with a third gear 1107, and the other end passes through the separation box 10 outwardly and is fixedly arranged with a second gear 1106 meshing with the first gear 1104; The filter plate 1001 includes an outer ring 10011, which is rotatably arranged on the inner wall of the separation box 10, and a filter screen 10012 is arranged between the inner walls of the outer ring 10011, wherein the right partition plate 1002 abuts against the outer ring 10011, the end of the right partition plate 1002 is convex and abuts against the filter screen 10012, and the two sides of the convex part are tightly attached to the inner periphery of the outer ring 10011; the inner periphery of the outer ring 10011 is also provided with tooth grooves meshing with the third gear 1107; When the airflow in the first exhaust pipe 1004 passes through, it will act on the fan blades 1103 to drive the shaft 1102 to rotate, and the shaft 1102 will drive the first gear 1104 to rotate. The first gear 1104 will drive the transmission rod 1105 to rotate through the second gear 1106, thereby driving the third gear 1107 to rotate. The rotation of the third gear 1107 will drive the outer ring 10011 to rotate, thereby driving the filter 10012 to rotate, so as to rotate the fine particles adsorbed on the filter 10012 into the discharge chamber.

[0029] Preferably, a cleaning portion 13 for cleaning the filter plate 1001 is also provided in the separation box 10; The cleaning part 13 includes a bracket 1301, which is arranged between the filter plate 1001 and the cover plate 1005 and fixedly installed at the bottom of the inner cavity of the separation box 10, and a support rod 1302 is rotatably provided at the end of the bracket 1301, and a rotating tooth 1307 is fixedly connected to one end of the support rod 1302 close to the filter plate 1001, and the rotating tooth 1307 is meshed with the tooth groove on the outer ring 10011, and a lower bevel gear 1303 is fixedly sleeved on the support rod 1302, and a roller shaft 1304 is rotatably provided at the bottom of the left partition plate 1003, and an upper bevel gear 1305 meshing with the lower bevel gear 1303 is fixedly provided at the bottom of the roller shaft 1304, and a cleaning roller 1306 for scraping the filter plate 1001 is sleeved on the roller shaft 1304, and bristles are provided on the cleaning roller 1306; When the filter plate 1001 rotates, the outer ring 10011 drives the rotating teeth 1307 to rotate, the rotating teeth 1307 drives the support rod 1302 to rotate, and the support rod 1302 drives the roller 1304 to rotate through the lower bevel gear 1303 and the upper bevel gear 1305, thereby driving the cleaning roller 1306 to rotate to clean the filter screen 10012 and remove the fine particles remaining on the filter screen 10012.

[0030] Preferably, the driving part includes a driving rod 8, the top of which is connected to the driving motor inside the body 1, the bottom of which is fixedly connected to a driving gear 801, and the outer periphery of the hollow rotating ring 5 is fixedly sleeved with a driven gear 802 meshing with the driving gear 801; The driving motor on the body 1 drives the driving rod 8 to rotate, and the driving rod 8 drives the driving gear 801 to rotate. The driving gear 801 rotates through the driven gear 802, thereby driving the hollow outer ring 10011 to rotate, and then drives the scraper rod 6 to move to scrape the inner wall of the drying tower 301.

[0031] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0032] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A drying device for producing urea-formaldehyde resin, comprising a body (1), a collecting box (2) disposed at the bottom of the body (1), a spray dryer (3) and a separator (4) disposed on the collecting box (2), the two being connected via an air duct (9), characterized in that: The collection box (2) is capable of classifying and collecting particles discharged by the spray dryer (3) and the separator (4); the spray dryer (3) comprises a drying tower (301), one side of the drying tower (301) is connected to an air inlet pipe (304) connected to a hot air pump in the body (1), and the air inlet pipe (304) is arranged tangentially to the drying tower (301); the bottom of the drying tower (301) is connected to a discharge pipe (302) for discharging materials into the collection box (2); a nozzle (303) is arranged at the top of the drying tower (301), and the nozzle (303) is connected to a water pipe (305) connected to a peristaltic pump inside the body (1); a hollow rotating ring (5) is rotatably arranged at the center of the top of the drying tower (301), and the hollow rotating ring (5) is rotatably arranged at the top of the drying tower (301). At least two groups of cross arms (501) are arranged on the periphery of the rotating ring (5), and scraper rods (6) for scraping the inner wall of the drying tower (301) are arranged at the ends of the cross arms (501); at least two groups of guide rods (7) are arranged on the inner wall of the drying tower (301), and the tops of the guide rods (7) and the scraper rods (6) are located at the bottom of the air inlet pipe (304), and the bottoms of the two are located at the bottom of the air duct (9); a sealing plate (701) perpendicular to the guide rod (7) is arranged at one end of the guide rod (7) away from the drying tower (301), and the sealing plate (701) extends to both sides of the guide rod (7) so that the guide rod (7) is T-shaped as a whole; a driving part for driving the hollow rotating ring (5) to reciprocate is also arranged on the drying tower (301); The driving unit drives the scraper rod (6) to move to scrape the inner wall of the drying tower (301) and abut against the sealing plate (701) on the guide rod (7), and the two form a hollow air guide duct. The airflow enters from the top of the air guide duct and is discharged from the bottom of the air guide duct to discharge the large particles scraped by the scraper rod (6) at high speed. The large particles are discharged into the collection box (2) through the discharge pipe (302) due to inertia and self-weight for collection.

2. The drying device for producing urea-formaldehyde resin according to claim 1, characterized in that: Wing plates (601) perpendicular to the scraper rod (6) are respectively arranged on both sides of the scraper rod (6), and fine holes are opened on the wing plates (601) through which fine particles can be discharged, and the length of the wing plates (601) is smaller than the length of the sealing plate (701) extending outward from the guide rod (7).

3. The drying device for producing urea-formaldehyde resin according to claim 1, characterized in that: The separator (4) is arranged tangentially to the induced draft pipe (9), and an exhaust pipe (401) connected to a suction pump in the fuselage (1) is arranged at the top of the separator (4); a separation component for separating fine particles is arranged at the bottom of the exhaust pipe (401), and the fine particles separated by the separation component are introduced into the collection box (2) for collection.

4. The drying device for producing urea-formaldehyde resin according to claim 3, characterized in that: The separation assembly comprises a separation box (10) with an opening at one end, the separation box (10) being arranged at the bottom end of the exhaust pipe (401) and being connected to the exhaust pipe (401), a filter plate (1001) being rotatably arranged in the separation box (10), and a right partition plate (1002) and a left partition plate (1003) being symmetrically arranged on both sides of the filter plate (1001), the two partition plates being respectively fixedly connected to the inner wall of the separation box (10) and dividing the separation box (10) from top to bottom into a filter chamber and a discharge chamber, and a cover plate (1005) being arranged at the left end of the discharge chamber for sealing the discharge chamber; wherein a spacer is arranged between the left partition plate (1003) and the filter plate (1001) in the shape of The ash passage is formed into a row, and the right partition (1002) is arranged in abutment with the filter plate (1001); a driving component (11) for driving the filter plate (1001) to rotate is arranged in the separation box (10); a first exhaust pipe (1004) is arranged on one side of the separation box (10), and the top of the first exhaust pipe (1004) is connected to the exhaust pipe (401), and the bottom is connected to the discharge cavity; a second exhaust pipe (12) is arranged on the other side of the separation box (10), and the top of the second exhaust pipe (12) is connected to the discharge cavity, and the other end is connected to the collection box (2), and a suction part is arranged in the collection box (2) to form a negative pressure in the second exhaust pipe (12).

5. The drying device for producing urea-formaldehyde resin according to claim 4, characterized in that: Two groups of partitions are arranged in the collection box (2), and the two groups of partitions divide the collection box (2) into a large particle chamber (201), a conventional particle chamber (202) and a fine particle chamber (203) from right to left in sequence; wherein the large particle chamber (201) is connected to the discharge pipe (302) to collect large particles discharged from the drying tower (301), the conventional particle chamber (202) is connected to the separator (4) to collect particles discharged from the separator (4), and the fine particle chamber (203) is connected to the second exhaust pipe (12) to collect fine particles separated by the separation component.

6. The drying device for producing urea-formaldehyde resin according to claim 5, characterized in that: The suction part comprises an air pump (205), which is arranged on a side of the collection box (2), and the air inlet of the air pump (205) is connected to the fine particle chamber (203); a dust filter bag (204) is also arranged in the fine particle chamber (203) to prevent fine particles from being discharged outward through the air pump (205).

7. The drying device for producing urea-formaldehyde resin according to claim 4, characterized in that: The driving assembly (11) comprises a convex plate (1101), the convex plate (1101) being arranged at one side of the first exhaust pipe (1004) and being in communication with the first exhaust pipe (1004); a shaft (1102) being rotatably arranged in the convex plate (1101), a fan blade (1103) being arranged on the shaft (1102), the fan blade (1103) extending outwardly into the first exhaust pipe (1004); a first gear (1104) being rotatably arranged on the convex plate (1101), the first gear (1104) being fixedly connected to the shaft (1102); a transmission rod (1105) being rotatably arranged on the separation box (10), a third gear (1107) being fixedly arranged at one end of the transmission rod (1105), and a second gear (1106) meshing with the first gear (1104) being fixedly arranged at the other end; The filter plate (1001) comprises an outer ring (10011) which is rotatably arranged on the inner wall of the separation box (10), and a filter screen (10012) is arranged between the inner walls of the outer ring (10011); the inner circumference of the outer ring (10011) is also provided with tooth grooves which mesh with the third gear (1107).

8. The drying device for producing urea-formaldehyde resin according to claim 4, characterized in that: The separation box (10) is also provided with a cleaning portion (13) for cleaning the filter plate (1001).

9. The drying device for producing urea-formaldehyde resin according to claim 8, characterized in that: The cleaning portion (13) comprises a bracket (1301), the bracket (1301) being arranged between the filter plate (1001) and the cover plate (1005) and fixedly mounted at the bottom of the inner cavity of the separation box (10); a support rod (1302) being rotatably arranged at the end of the bracket (1301); one end of the support rod (1302) close to the filter plate (1001) being fixedly connected to a rotating tooth (1307); a lower bevel gear (1303) being fixedly sleeved on the support rod (1302); a roller shaft (1304) being rotatably arranged at the bottom of the left partition plate (1003); an upper bevel gear (1305) meshing with the lower bevel gear (1303) being fixedly arranged at the bottom of the roller shaft (1304); and a cleaning roller (1306) for scraping the filter plate (1001) being sleeved on the roller shaft (1304).

10. The drying device for producing urea-formaldehyde resin according to claim 1, characterized in that: The driving unit comprises a driving rod (8), the top end of which is connected to a driving motor inside the body (1), the bottom of which is fixedly connected to a driving gear (801), and the outer periphery of the hollow rotating ring (5) is fixedly sleeved with a driven gear (802) meshing with the driving gear (801).

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