Redispersible latex powder spray drying device

Abstract

The utility model discloses a redispersible latex powder spray drying device, which belongs to the technical field of spray drying, and comprises a drying box, the top of the drying box is fixedly connected with a ventilation pipe, the top of the inner wall of the drying box is fixedly connected with an annular seat, and the bottom of the annular seat is provided with a blowing groove capable of blowing. The latex powder drying device has the beneficial effects that by arranging the annular base, the air blowing groove, the draught fan, the air funnel and the like, air blowing operation can be conveniently conducted on latex powder placed in the drying box, sprayed hot air makes contact with sprayed latex water mist better, and the drying effect is better; according to the latex drying device, the latex which is not completely dried and falls is blown and dried again, so that the latex is better dried, generation of latex caking is reduced, and by arranging a motor, an annular hanging plate, an annular sliding frame and a scraping plate, latex residues blown and hung on the side wall of the drying box are cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of spray drying, and more specifically to a spray drying device for redispersible latex powder. Background Art

[0002] Redispersible latex powder products are water-soluble redispersible powders, which are divided into ethylene / vinyl acetate copolymers, vinyl acetate / versatate copolymers, acrylic acid copolymers, etc. The powder adhesive is made after spray drying, and polyvinyl alcohol is used as a protective colloid. This powder can be quickly redispersed into an emulsion after contact with water. Since the redispersible latex powder has high bonding ability and unique properties;

[0003] When producing latex powder, a spray drying device is needed to dry the latex powder to facilitate loading and transportation;

[0004] In the related art, the redispersible latex powder spray drying device passes the material through the feed pipe through the material pump, and is atomized by the atomizer and enters the drying tower. The fan works in conjunction with the heating tube to generate hot air. At this time, the hot air mixed with the anti-caking agent is passed into the drying tower. The driving motor drives the rotating rod and the connecting rod to rotate, so that the stirring plate fully mixes the hot air, the anti-caking agent and the atomized material. At the same time, the rotating rod rotates to drive the scraper to scrape on the inner wall of the drying tower, and the anti-stick coating is used to prevent the inner wall of the drying tower from sticking.

[0005] The above-mentioned prior art solution has the following defects: the air inlet position and the latex spraying position are on both sides. When the latex is blown dry, the side far away from the blowing position is not completely blown dry and falls down, resulting in poor blowing effect, and the anti-caking agent and the latex powder formed by drying cannot be mixed well. Utility Model Content

[0006] (1) Technical issues to be solved

[0007] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a redispersible latex powder spray drying device, which has the characteristics of performing multiple blowing drying on the latex to prevent agglomeration.

[0008] (2) Technical solution

[0009] To achieve the above object, the utility model provides a redispersible latex powder spray drying device, comprising a drying box, a ventilation pipe is fixedly connected to the top of the drying box, an annular seat is fixedly connected to the top of the inner wall of the drying box, a blowing slot capable of blowing air is provided at the bottom of the annular seat, the output end of the ventilation pipe is connected to the blowing slot, and an inlet is provided on one side of the top of the ventilation pipe;

[0010] The top of the inner wall of the drying box is connected with an atomizing nozzle through a support rod, and the atomizing nozzle is located at the center of the annular seat;

[0011] The bottom of the drying box is fixedly connected with a support seat;

[0012] Two scraping plates capable of rotating in cooperation are arranged in the drying box, and limiting plates are arranged on both of the two scraping plates;

[0013] The bottom of the outer surface of the drying box is connected with an annular pipe, a plurality of shunt pipes are connected in the annular pipe, the output ends of the plurality of shunt pipes all pass through the drying box and are connected with blowing heads capable of blowing air, and the limiting plates are matched with the plurality of blowing heads.

[0014] When using the redispersible latex powder spray drying device of the present technical solution, through the blowing groove opened on the annular seat, hot air is evenly blown from the upper part of the drying box to the lower part, through the atomizing nozzle, the latex liquid is converted into a water mist shape, through the scraping plates arranged on the side wall of the drying box, the latex powder adhered to the side wall of the drying box is cleaned, and through the annular pipe, the shunt pipes and the blowing heads, the falling latex powder is blown and dried again, so that the drying is more thorough.

[0015] Further, the top of the inner wall of the drying box is fixedly connected with an annular hanging plate of "丄" shape, an annular sliding frame is slidably connected on the annular hanging plate, the two scraping plates are respectively fixedly connected to both sides of the bottom of the annular sliding frame, and a stirring rod is connected to the bottom of the two scraping plates.

[0016] Further, a motor is fixedly connected to the top of the drying box, an output shaft of the motor is fixedly connected with a rotating shaft, the rotating shaft passes through the drying box and is located inside the drying box, a gear is fixedly connected to the outer surface of the rotating shaft, and a rack is connected to the inner wall of the annular sliding frame, and the gear is meshed with the rack.

[0017] Further, a support frame is fixedly connected to one side of the support seat, a blower is fixedly connected to the top of the support frame, a first filter screen is connected to the input end of the blower, a second delivery pipe is connected to the output end of the blower, the other end of the second delivery pipe is connected with a baffle plate, the other side of the baffle plate is connected with a ventilation cylinder, a second filter screen is connected to the side wall of the ventilation cylinder, and a plurality of heating rods are connected to one side of the inner wall of the ventilation cylinder.

[0018] Further, the other side of the ventilation cylinder is connected with a first delivery pipe, the first delivery pipe is communicated with the ventilation cylinder, the other end of the first delivery pipe is communicated with the inlet on the ventilation pipe, a three-way valve is arranged on the first delivery pipe, and the other outlet of the three-way valve is connected with a third delivery pipe, and the other end of the third delivery pipe is communicated with the annular pipe.

[0019] Furthermore, a material pump is connected to one side of the drying box, and a material delivery pipe is fixedly connected to the output end of the material pump, and the other end of the material delivery pipe passes through the drying box and is connected to the atomizing nozzle.

[0020] Furthermore, a discharge port is provided at the bottom of the drying box, and a material extraction pipe is connected to one side of the discharge port.

[0021] (3) Beneficial effects

[0022] In summary, the utility model has the following beneficial effects:

[0023] 1. By setting up an annular seat, blowing slots, fans and ventilators, it is convenient to blow air to the latex powder in the drying box, so that the sprayed hot air can better contact with the sprayed latex mist, so as to achieve a better drying effect. By setting up an annular tube, a shunt tube and a blowing head, the latex that has not been completely dried and has fallen can be blown and dried again, so that the latex can be dried better, thereby reducing the generation of latex agglomeration. By setting up a motor, an annular hanging plate, an annular sliding frame and a scraper, the latex residue blown and hung on the side wall of the drying box can be cleaned;

[0024] 2. By setting a stirring rod, the dried latex powder is stirred to avoid accumulation and agglomeration, and the dried latex powder can be discharged better. By setting a first filter, a baffle and a second filter, the extracted heated air is filtered, which facilitates the replacement and cleaning of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the drawings required for describing the specific implementation or the prior art will be briefly introduced below. Obviously, the drawings described below are only one implementation of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram of a three-dimensional cross-section of the utility model;

[0027] Figure 2 It is a structural schematic diagram of the utility model in front view section;

[0028] Figure 3 It is a structural schematic diagram of the second three-dimensional cross section of the utility model;

[0029] Figure 4 For this utility model Figure 2 Schematic diagram of the structure of the middle annular sliding frame.

[0030] The symbols in the accompanying drawings are:

[0031] 1. Drying box; 2. Support seat; 3. Ventilation pipe; 4. Annular seat; 5. Blowing slot; 6. Inlet; 7. First conveying pipe; 8. Support frame; 9. Fan; 10. First filter; 11. Second conveying pipe; 12. Baffle; 13. Ventilation tube; 14. Second filter; 15. Heating rod; 16. Three-way valve; 17. Third conveying pipe; 18. Annular pipe; 19. Diverter pipe; 20. Blowing head; 21. Material pump; 22. Material delivery pipe; 23. Support rod; 24. Atomizing nozzle; 25. Annular hanging plate; 26. Annular sliding frame; 27. Scraper; 28. Stirring rod; 29. ​​Limit plate; 30. Motor; 31. Rotating shaft; 32. Gear; 33. Rack; 34. Discharge port; 35. Extraction pipe. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the utility model easy to understand, the technical scheme in the specific implementation mode of the utility model is clearly and completely described below to further illustrate the utility model. Obviously, the specific implementation mode described is only a part of the implementation mode of the utility model, rather than all styles.

[0033] Embodiment 1:

[0034] See also Figure 1 , Figure 3 and Figure 4 The utility model provides a technical solution: a redispersible latex powder spray drying device, comprising a drying box 1, a ventilation pipe 3 is fixedly connected to the top of the drying box 1, a ring seat 4 is fixedly connected to the top of the inner wall of the drying box 1, a blowing slot 5 capable of blowing air is opened at the bottom of the ring seat 4, the blowing slot 5 is a ring structure, which better cooperates with the atomizing nozzle 24 to perform drying operation, the output end of the ventilation pipe 3 is connected to the blowing slot 5, and an inlet 6 is arranged on one side of the top of the ventilation pipe 3;

[0035] The top of the inner wall of the drying box 1 is connected to an atomizing nozzle 24 through a support rod 23. The atomizing nozzle 24 is located at the center of the annular seat 4, and sprays the atomized latex to the surroundings to better contact the hot air, thereby drying;

[0036] The bottom of the drying box 1 is fixedly connected with a support base 2;

[0037] Two scrapers 27 capable of cooperating and rotating are arranged in the drying box 1, and limit plates 29 are arranged on the two scrapers 27;

[0038] An annular tube 18 is connected to the bottom of the outer surface of the drying box 1, and multiple shunt tubes 19 are connected inside the annular tube 18. The output ends of the multiple shunt tubes 19 all pass through the drying box 1 and are connected to blowing heads 20 that can blow air. The limiting plate 29 cooperates with the multiple blowing heads 20.

[0039] Specifically, a ring-shaped hanging plate 25 with an "丄" shape is fixedly connected to the top of the inner wall of the drying oven 1. A ring-shaped sliding frame 26 is slidably connected to the ring-shaped hanging plate 25. Two scraping plates 27 are respectively fixedly connected to both sides of the bottom of the ring-shaped sliding frame 26. A stirring rod 28 is connected to the bottom of the two scraping plates 27. A motor 30 is fixedly connected to the top of the drying oven 1. The output shaft of the motor 30 is fixedly connected to a rotating shaft 31. The rotating shaft 31 passes through the drying oven 1 and is located inside the drying oven 1. A gear 32 is fixedly connected to the outer surface of the rotating shaft 31. A rack 33 is connected to the inner wall of the ring-shaped sliding frame 26. The gear 32 meshes with the rack 33.

[0040] By adopting the above technical solution, through the ring-shaped hanging plate 25 with an "丄" shape and the ring-shaped sliding frame 26 provided with an "丄" shaped groove, when driving the ring-shaped sliding frame 26 to rotate, the scraping plate 27 at the bottom can be limited, so that the scraping plate 27 can better adhere to the side wall of the drying oven 1, thereby cleaning the side wall of the drying oven 1. Through the cooperation of the motor 30, the gear 32 and the rack 33, the ring-shaped sliding frame 26 can be better driven to rotate.

[0041] Specifically, a support frame 8 is fixedly connected to one side of the support base 2. A blower 9 is fixedly connected to the top of the support frame 8. The input end of the blower 9 is connected to a first filter screen 10. The output end of the blower 9 is connected to a second delivery pipe 11. The other end of the second delivery pipe 11 is connected to a baffle 12. The other side of the baffle 12 is connected to a ventilation cylinder 13. A second filter screen 14 is connected to the side wall of the ventilation cylinder 13. A plurality of heating rods 15 are connected to one side of the inner wall of the ventilation cylinder 13. The other side of the ventilation cylinder 13 is connected to a first delivery pipe 7. The first delivery pipe 7 is communicated with the ventilation cylinder 13. The other end of the first delivery pipe 7 is communicated with the inlet 6 on the ventilation pipe 3. A three-way valve 16 is arranged on the first delivery pipe 7. The other outlet of the three-way valve 16 is connected to a third delivery pipe 17. The other end of the third delivery pipe 17 is communicated with the annular pipe 18.

[0042] By adopting the above technical solution, through the blower 9, the first delivery pipe 7 and the second delivery pipe 11, the air extraction operation is convenient, and through continuous operation, the heated hot air can be pushed into the drying oven 1. Through the first filter screen 10 and the second filter screen 14, the air extracted by the blower 9 is filtered to avoid dust carried in the air from entering the drying oven 1 and polluting the latex powder. Through the heating rods 15, the extracted air is heated. Through the three-way valve 16, the output hot air is shunted to provide hot air for the blowing heads 20 installed on the side wall of the drying oven 1.

[0043] Embodiment Two:

[0044] On the basis of Embodiment One, please refer to Figure 2 .

[0045] Specifically, a material pump 21 is connected to one side of the drying box 1 , and a material delivery pipe 22 is fixedly connected to the output end of the material pump 21 . The other end of the material delivery pipe 22 passes through the drying box 1 and is connected to the atomizing nozzle 24 .

[0046] By adopting the above technical solution, the latex liquid to be dried can be conveniently extracted through the material pump 21 and the material delivery pipe 22, and then put into the atomizing nozzle 24 on the top of the inner wall of the drying box 1 for spraying and drying.

[0047] Specifically, a discharge port 34 is provided at the bottom of the drying box 1 , and a material extraction pipe 35 is connected to one side of the discharge port 34 .

[0048] By adopting the above technical solution, the dried latex powder can be easily extracted through the discharge port 34 and the extraction pipe 35, which is convenient for the staff to perform storage operations and relieve the pressure in the drying box 1.

[0049] The working principle of the utility model is as follows: when in use, the staff places the drying box 1 at a suitable position, supplies power through an external power supply, starts the fan 9 to work, and performs exhaust operation. The extracted air is filtered for the first time through a first filter 10 arranged at the air inlet of the fan 9, and the extracted air is put into a second conveying pipe 11, and enters a ventilation duct 13 through the second conveying pipe 11. The air is filtered for the second time through a second filter 14 arranged in the ventilation duct 13. The filtered air is heated by a heating rod 15. The heated air is squeezed into the first conveying pipe 7, and then enters the ventilation pipe 3, and is released through a blowing slot 5 opened at the bottom of the annular seat 4 of the ventilation pipe 3. Since the blowing slot 5 is annular, the direction in which the heated air is released is annular.

[0050] The latex powder liquid is extracted through the operation of the material pump 21, transported through the material delivery pipe 22, and sprayed to the surroundings through the atomizing nozzle 24. After adjustment by the atomizing nozzle 24, the liquid latex is sprayed into water mist. The water mist latex sprayed by the atomizing nozzle 24 is sprayed on the hot air blown around at the center of the hot air, so as to better contact with the hot air, thereby drying the latex liquid.

[0051] When spray drying is carried out, the motor 30 works to drive the rotation of the rotating shaft 31, thereby driving the rotation of the gear 32, which meshes with and drives the annular sliding frame 26 provided with the rack 33 to rotate, causing the annular sliding frame 26 to rotate on the annular hanging plate 25. Since the annular hanging plate 25 has a "丄" - shaped structure and the annular sliding frame 26 is also provided with a groove of "丄" - shaped structure, the annular sliding frame 26 can slide and rotate on the annular hanging plate 25, thereby driving the scraper 27 below to rotate along the inner wall of the drying chamber 1, so as to clean the inner wall of the drying chamber 1. For the latex powder adhered to the inner wall of the drying chamber 1 by blowing, through the stirring rods 28 connected to the bottom of the two scrapers 27, the accumulated latex powder falling is stirred, so that the latex powder can smoothly enter the discharge port 34, and then the pump (not shown in the figure) installed on the connecting pumping pipe 35 connected to the pumping pipe 35 extracts the dried latex powder for extraction and storage.

[0052] When drying the latex, the staff can open the switch on the third delivery pipe 17. Through the diversion of the three - way valve 16, a part of the heated gas in the ventilation cylinder 13 enters the third delivery pipe 17, passes through the third delivery pipe 17 and enters the annular pipe 18, and is further divided through the diversion pipe 19, so that the hot air is blown out at multiple blowing heads 20 to perform secondary blowing and drying on the latex dried by blowing above, avoiding the situation that the latex powder that has not been completely dried above forms lumps after falling. Through the limiting plate 29 provided on the scraper 27, the blowing heads 20 are staggered. When the blowing heads 20 perform blowing operations, it does not affect the synchronous operation of the scraper 27, thus making the effect better.

[0053] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make modifications without creative contributions to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A spray drying device for redispersible latex powder, comprising a drying oven (1), characterized in that: A ventilation pipe (3) is connected to the top of the drying oven (1). An annular seat (4) is connected to the top inner wall of the drying oven (1). A blowing groove (5) capable of blowing air is formed at the bottom of the annular seat (4). The output end of the ventilation pipe (3) is communicated with the blowing groove (5). An inlet (6) is arranged on one side of the top of the ventilation pipe (3). An atomizing nozzle (24) is connected to the top inner wall of the drying oven (1) through a support rod (23). The atomizing nozzle (24) is located at the central position of the annular seat (4). A support base (2) is connected to the bottom of the drying oven (1). Two scraping plates (27) capable of rotating in cooperation are arranged in the drying oven (1). Limiting plates (29) are arranged on both of the two scraping plates (27). An annular pipe (18) is connected to the bottom outer surface of the drying oven (1). A plurality of shunt pipes (19) are connected in the annular pipe (18). The output ends of the plurality of shunt pipes (19) all pass through the drying oven (1) and are connected with blowing heads (20) capable of blowing air. The limiting plates (29) cooperate with the plurality of blowing heads (20).

2. The redispersible latex powder spray drying device according to claim 1, characterized in that: An annular hanging plate (25) with a "丄” shaped structure is connected to the top inner wall of the drying oven (1). An annular sliding frame (26) is slidably connected to the annular hanging plate (25). The two scraping plates (27) are respectively connected to both sides of the bottom of the annular sliding frame (26). Stirring rods (28) are connected to the bottoms of the two scraping plates (27).

3. The redispersible latex powder spray drying device according to claim 2, characterized in that: A motor (30) is connected to the top of the drying oven (1). An output shaft of the motor (30) is connected with a rotating shaft (31). The rotating shaft (31) passes through the drying oven (1) and is located inside the drying oven (1). A gear (32) is connected to the outer surface of the rotating shaft (31). A rack (33) is connected to the inner wall of the annular sliding frame (26). The gear (32) meshes with the rack (33).

4. The redispersible latex powder spray drying device according to claim 1, characterized in that: A support frame (8) is connected to one side of the support base (2). A blower (9) is connected to the top of the support frame (8). A first filter screen (10) is connected to the input end of the blower (9). A second delivery pipe (11) is connected to the output end of the blower (9). The other end of the second delivery pipe (11) is connected with a baffle (12). The other side of the baffle (12) is connected with a ventilation cylinder (13). A second filter screen (14) is connected to the side wall of the ventilation cylinder (13). A plurality of heating rods (15) are connected to one side of the inner wall of the ventilation cylinder (13).

5. The redispersible latex powder spray drying device according to claim 4, characterized in that: The other side of the ventilation cylinder (13) is connected with a first delivery pipe (7). The first delivery pipe (7) is communicated with the ventilation cylinder (13). The other end of the first delivery pipe (7) is communicated with the inlet (6) on the ventilation pipe (3). A three-way valve (16) is arranged on the first delivery pipe (7). The other outlet of the three-way valve (16) is connected with a third delivery pipe (17). The other end of the third delivery pipe (17) is connected with the annular pipe (18).

6. The redispersible latex powder spray drying device according to claim 1, characterized in that: A material pump (21) is connected to one side of the drying box (1), an output end of the material pump (21) is connected to a material delivery pipe (22), and the other end of the material delivery pipe (22) passes through the drying box (1) and is connected to an atomizing nozzle (24).

7. The redispersible latex powder spray drying device according to claim 1, characterized in that: The bottom of the drying box (1) is provided with a discharge port (34), and one side of the discharge port (34) is connected to a material extraction pipe (35).

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