Fluidized bed drying system for anionic polyacrylamide production

Abstract

The invention discloses a fluidized bed drying system for anionic polyacrylamide production, which comprises a support and a dryer, a first support rod and a second support rod are respectively fixed on two sides of the dryer, and the first support rod and the second support rod are rotatably mounted on the support. The ends, away from the dryer, of the first supporting rod and the second supporting rod are connected with an air inlet pipe and an air outlet pipe through rotary joints correspondingly. Through the rotary design of the fluidized bed drying system and the dryer, polyacrylamide colloidal particles are in continuous contact with hot air in the falling process, the contact area is increased, the contact time is prolonged, and therefore the drying efficiency is remarkably improved; the opening and closing mechanism in the temporary storage device is opened or closed at a proper position, the materials are prevented from flowing out when not needed, meanwhile, it is guaranteed that the materials fall smoothly at the highest point, and the drying effect is further promoted.

Description

Technical Field

[0001] The invention relates to the technical field of anionic polyacrylamide production, in particular to a fluidized bed drying system for anionic polyacrylamide production. Background Art

[0002] In the production process of anionic polyacrylamide, the reaction principle is:

[0003] Add the prepared prepolymer liquid (acrylamide monomer and sodium acrylate solution, urea, soda ash, sodium sulfate, pure water, etc.) into the polymerization kettle, and under the action of the initiator, the prepolymer liquid polymerizes to become a colloid. Reaction equation:

[0004]

[0005] The process includes: prepolymer liquid preparation, polymerization reaction, granulation, fluidized bed drying, crushing, screening and packaging. In the fluidized bed drying process, the granulated polyacrylamide colloidal particles are sent to the fluidized bed dryer for drying. In the dryer in the prior art, hot air is generally blown directly to the material. Although it has a structure to break up the material, the contact area between the material and the hot air is still insufficient, and the drying efficiency needs to be improved. Summary of the invention

[0006] In order to solve the problems mentioned in the above background technology, the present invention provides a fluidized bed drying system for producing anionic polyacrylamide.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A fluidized bed drying system for producing anionic polyacrylamide comprises a bracket and a dryer, wherein a first support rod and a second support rod are respectively fixed on both sides of the dryer, and the first support rod and the second support rod are rotatably mounted on the bracket, and the ends of the first support rod and the second support rod away from the dryer are respectively connected to an air inlet pipe and an air outlet pipe through a rotating joint, a filter screen is installed in the air inlet pipe, the first support rod and the second support rod are hollow, a rotating drive mechanism is installed on the bracket for driving the dryer to rotate, temporary reservoirs are fixed on the top and bottom ends of the dryer, and an opening and closing mechanism is provided at the connecting portion between the temporary reservoir and the dryer, and the opening and closing mechanism can separate the temporary reservoir from the dryer by switching the state.

[0009] Preferably, the rotary drive mechanism comprises a rotary motor, which is fixedly mounted on the bracket, a first gear is fixed to the output shaft of the rotary motor, a second gear is fixed to the outside of the second support rod, and the first gear is meshed with the second gear.

[0010] Preferably, a material inlet and outlet is provided on a side of the temporary storage away from the dryer, and a cover is detachably mounted on the material inlet and outlet.

[0011] Preferably, a plurality of baffle plates are staggeredly arranged inside the dryer, and leakage holes are opened on the baffle plates.

[0012] Preferably, the opening and closing mechanism includes a baffle, and a plurality of baffles are provided, and the plurality of baffles are rotatably mounted inside the baffle, and when the plurality of baffles are simultaneously rotated to a horizontal state, adjacent baffles contact each other.

[0013] Preferably, the mounting shaft of the baffle extends to the outside of the buffer and is fixed with a third gear, and a fourth gear is rotatably mounted on the side wall of the buffer at a gap position between adjacent third gears, and the plurality of third gears are meshed with the plurality of fourth gears in sequence.

[0014] Preferably, a fifth gear is mounted on a rotating shaft on one side of one of the baffles away from the third gear, a push rod motor is fixed on the outer wall of the temporary storage device, a rack is fixed on the output shaft of the push rod motor, and the rack is meshed with the fifth gear.

[0015] Preferably, a switching switch is fixed on a side of the outer wall of the temporary storage device close to the push rod motor, the switching switch is connected to the push rod motor through a wire, and a first trigger rod, a second trigger rod and a third trigger rod are fixed on the bracket.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Through the fluidized bed drying system and the rotating design of the dryer, the polyacrylamide colloid particles are constantly in contact with hot air during the falling process, which increases the contact area and contact time, thereby significantly improving the drying efficiency.

[0018] 2. A switchable opening and closing mechanism is used to ensure that the opening and closing mechanism in the temporary storage device is opened or closed at the appropriate position during the rotation of the dryer, avoiding the outflow of materials when not needed, and ensuring that the materials fall smoothly at the highest point, further promoting the drying effect.

[0019] 3. Through the cooperation of the rotating motor, the push rod motor, the switching switch and the trigger rod, the automatic rotation of the dryer and the intelligent control of the opening and closing mechanism are realized, which reduces manual operation and improves production efficiency and automation level.

[0020] 4. The staggered baffles inside the dryer not only slow down the falling speed of the particles, but also further increase the contact opportunities between the particles and the hot air, thus improving the drying effect. At the same time, the design of the filter screen prevents the hot air from taking the particles out, thus ensuring the cleanliness of the production environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a first perspective stereogram of the present invention;

[0023] Figure 2 for Figure 2 A zoomed-in detail of position A in the middle;

[0024] Figure 3 It is a front view of the present invention;

[0025] Figure 4 A second perspective stereogram of the present invention

[0026] Figure 5 This is a cross-sectional view of the dryer from the main viewing angle of the present invention;

[0027] Figure 6 A sectional view of a dryer in a three-dimensional perspective according to the present invention;

[0028] Figure 7 It is a schematic diagram of the structure of the baffle in the temporary storage device of the present invention in the closed state;

[0029] Figure 8 for Figure 7 Enlarged detail of position B in the middle;

[0030] Fig. 9 It is a schematic diagram of the cooperation relationship between the third gear and the fourth gear of the present invention;

[0031] Fig.10 It is a schematic diagram of the structure of the buffer in the present invention in an open state;

[0032] In the figure: 1 bracket, 2 dryer, 201 first support rod, 202 second support rod, 203 rotary joint, 204 air inlet pipe, 205 air outlet pipe, 206 second gear, 207 rotary motor, 208 first gear, 209 baffle, 3 temporary storage, 301 material inlet and outlet, 302 baffle, 303 fifth gear, 304 push rod motor, 305 rack, 306 third gear, 307 fourth gear, 4 first trigger rod, 401 second trigger rod, 402 third trigger rod, 403 switching switch. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1

[0035] Reference Figure 1-10 , a fluidized bed drying system for producing anionic polyacrylamide, comprising a bracket 1 and a dryer 2, a first support rod 201 and a second support rod 202 are respectively fixed on both sides of the dryer 2, the first support rod 201 and the second support rod 202 are rotatably mounted on the bracket 1, the first support rod 201 and the second support rod 202 are respectively connected to an air inlet pipe 204 and an air outlet pipe 205 through a rotary joint 203 at one end away from the dryer 2, a filter screen is installed in the air inlet pipe 204, the filter screen prevents hot air from bringing out particles, the air outlet pipe 205 is connected to a bag filter to collect dust in the exhaust gas, the first support rod 201 and the second support rod 202 are hollow, a rotary drive mechanism is installed on the bracket 1 for driving the dryer 2 to rotate, a temporary storage 3 is fixed at the top and bottom ends of the dryer 2, an opening and closing mechanism is provided at the communicating portion between the temporary storage 3 and the dryer 2, and the opening and closing mechanism can separate the temporary storage 3 from the dryer 2 by switching the state;

[0036] The diced polyacrylamide colloid particles are transferred to the interior of the dryer 2, and the hot air enters the dryer 2 through the air inlet pipe 204 to heat and dry the material. During the heating process, the dryer 2 can be driven to rotate by the rotary drive mechanism. When the dryer 2 is turned over, the positions of the two temporary storages 3 can be swapped, and the particles can fall through the upper temporary storage 3 and fall into the lower temporary storage 3. During the falling process, the particles can increase the contact rate with the hot air and improve the drying efficiency. The existence of the opening and closing mechanism can ensure that the temporary storage 3 located at the bottom is closed during the process of rotating to the highest position, ensuring that the material inside the temporary storage 3 will not flow out during this process. After reaching the highest point, the opening and closing mechanism is opened, and the particles fall vertically.

[0037] Example 2

[0038] Reference Figure 1-10The difference between this embodiment and the first embodiment is that the rotary drive mechanism includes a rotary motor 207, the rotary motor 207 is fixedly mounted on the bracket 1, the output shaft of the rotary motor 207 is fixed with a first gear 208, the outside of the second support rod 202 is fixed with a second gear 206, the first gear 208 is meshed with the second gear 206, and the rotary motor 207 is turned on to drive the first gear 208 to rotate, and the first gear 208 is meshed with the second gear 206 to drive the dryer 2 to rotate, thereby continuously switching the position between the two temporary storages 3 to achieve the purpose of accelerating drying, and a material inlet and outlet 301 is provided on the side of the temporary storage 3 away from the dryer 2, and a cover is detachably mounted on the material inlet and outlet 301, and materials are added to the dryer 2 or discharged from the dryer 2 through the material inlet and outlet 301.

[0039] The dryer 2 has a plurality of baffles 209 arranged in an interlaced manner inside, and leak holes are provided on the baffles 209;

[0040] When the particles fall onto the baffle plate 209 , the baffle plate 209 can block the particles, and the particles flow down through the holes on the baffle plate 209 , which can slow down the falling speed of the particles, thereby improving the drying efficiency of the material.

[0041] Example 3

[0042] Reference Figure 1-10 The difference between this embodiment and embodiment 1 is that the opening and closing mechanism includes a baffle 302, and a plurality of baffles 302 are provided, and the plurality of baffles 302 are rotatably installed inside the baffle 302. When the plurality of baffles are simultaneously rotated to a horizontal state, adjacent baffles 302 are in contact with each other, and this is the closed state of the opening and closing mechanism. When the baffles 302 are synchronously rotated by a small angle, gaps will be generated between the adjacent baffles 302, so that particles can pass through the gaps, thereby ensuring that the particles can pass through the gaps into the temporary storage container 3, or flow out of the temporary storage container 3.

[0043] The mounting shaft of the baffle 302 extends to the outside of the buffer 3 and is fixed with a third gear 306. A fourth gear 307 is rotatably mounted on the side wall of the buffer 3 at a gap between adjacent third gears 306. The third gears 306 and the fourth gears 307 are meshed in sequence.

[0044] When one of the baffles 302 is driven to rotate, the meshing transmission between the third gear 306 and the fourth gear 307 can ensure that the other baffles 302 are synchronously rotated. A fifth gear 303 is installed on the rotating shaft of one of the baffles 302 away from the third gear 306. A push rod motor 304 is fixed on the outer wall of the temporary storage 3. A rack 305 is fixed on the output shaft of the push rod motor 304, and the rack 305 is meshed with the fifth gear 303.

[0045] The push rod motor 304 can drive the rack 305 to move horizontally, and then drive one of the baffles 302 to rotate through the engagement of the rack 305 and the fifth gear 303, thereby achieving the purpose of driving multiple baffles 302 to rotate synchronously, thereby driving the opening and closing of the opening and closing mechanism.

[0046] Among them, refer to Figure 4 A switch 403 is fixed on the outer wall of the temporary register 3 near the push rod motor 304, the switch 403 is connected to the push rod motor 304 through a wire, and a first trigger rod 4, a second trigger rod 401 and a third trigger rod 402 are fixed on the bracket 1;

[0047] The dryer 2 rotates counterclockwise. At this time, when one of the temporary storages 3 moves to the lowest position, the switch 403 touches the first trigger rod 4, and the opening and closing mechanism switches to the open state, ensuring that the particles falling from the top can enter the temporary storage 3 below. The dryer 2 continues to rotate counterclockwise. When it rotates to the position where the switch 403 touches the second trigger rod 401, the opening and closing mechanism switches to the closed state, which can ensure that the particles in the temporary storage 3 will not flow out during this process. When the dryer 2 continues to rotate counterclockwise, it rotates to the position where the switch 403 touches the third trigger rod 402, and the opening and closing mechanism switches to the open state, ensuring that after the temporary storage 3 moves to the highest state, the particles inside can fall, thereby accelerating the drying. In this cycle, the particles can be continuously transferred to the highest point, and fall down to exchange heat with the hot air, thereby accelerating the drying.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fluidized bed drying system for producing anionic polyacrylamide, comprising a support (1) and a dryer (2), Features: A first support rod (201) and a second support rod (202) are fixed on both sides of the dryer (2), and the first support rod (201) and the second support rod (202) are rotatably mounted on the bracket (1). The ends of the first support rod (201) and the second support rod (202) away from the dryer (2) are connected to an air inlet pipe (204) and an air outlet pipe (205) via a rotary joint (203), respectively. A filter screen is installed in the air inlet pipe (204). The first support rod (201) and the second support rod (202) are hollow. A rotary drive mechanism is installed on the bracket (1) for driving the dryer (2) to rotate. A temporary storage device (3) is fixed at the top and bottom ends of the dryer (2). An opening and closing mechanism is provided at the communicating portion between the temporary storage device (3) and the dryer (2). The opening and closing mechanism can separate the temporary storage device (3) from the dryer (2) by switching the state.

2. A fluidized bed drying system for producing anionic polyacrylamide according to claim 1, Features: The rotary drive mechanism comprises a rotary motor (207), the rotary motor (207) is fixedly mounted on the bracket (1), a first gear (208) is fixed to the output shaft of the rotary motor (207), a second gear (206) is fixed to the outside of the second support rod (202), and the first gear (208) is meshed with the second gear (206).

3. A fluidized bed drying system for producing anionic polyacrylamide according to claim 1, Features: A material inlet and outlet (301) is provided on a side of the temporary storage (3) away from the dryer (2), and a cover is detachably mounted on the material inlet and outlet (301).

4. A fluidized bed drying system for producing anionic polyacrylamide according to claim 1, Features: A plurality of baffle plates (209) are arranged in an alternating manner inside the dryer (2), and leakage holes are provided on the baffle plates (209).

5. A fluidized bed drying system for producing anionic polyacrylamide according to claim 1, Features: The opening and closing mechanism comprises a baffle (302), wherein a plurality of baffles (302) are provided, and the plurality of baffles (302) are rotatably mounted inside the baffle (302), and when the plurality of baffles are simultaneously rotated to a horizontal state, adjacent baffles (302) are in contact with each other.

6. A fluidized bed drying system for producing anionic polyacrylamide according to claim 5, Features: The mounting shaft of the baffle (302) extends to the outside of the buffer (3) and is fixed with a third gear (306); a fourth gear (307) is rotatably mounted on the side wall of the buffer (3) in the gap between adjacent third gears (306); and the plurality of third gears (306) and the plurality of fourth gears (307) are meshed in sequence.

7. A fluidized bed drying system for producing anionic polyacrylamide according to claim 6, Features: A fifth gear (303) is mounted on a rotating shaft on one side of one of the baffles (302) away from the third gear (306), a push rod motor (304) is fixed on the outer wall of the temporary storage device (3), a rack (305) is fixed on the output shaft of the push rod motor (304), and the rack (305) is meshed with the fifth gear (303).

8. A fluidized bed drying system for producing anionic polyacrylamide according to claim 7, Features: A switching switch (403) is fixed on the outer wall of the temporary storage device (3) at one side close to the push rod motor (304), and the switching switch (403) is connected to the push rod motor (304) through a wire. A first trigger rod (4), a second trigger rod (401) and a third trigger rod (402) are fixed on the bracket (1).

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