A polyacrylamide drying device

Abstract

The utility model relates to drying equipment technical field discloses a kind of polyacrylamide drying devices, and the new scheme of the utility model, including pivot and air pipe, the outer side wall of pivot is provided with spiral stirring vane, the left and right sides of pivot are respectively provided with liquid discharge port and liquid inlet, the inside of spiral stirring vane is provided with infusion channel, the liquid inlet and liquid outlet of infusion channel are respectively connected with the liquid inlet and liquid discharge port of pivot, the outer side wall left and right sides of pivot are respectively sleeved with second sleeve pipe and first sleeve pipe;The utility model is heated spiral stirring vane to polyacrylamide is stirred and heated, and cooperate with the even input high-temperature hot air in drying box to the air distribution plate, to improve the drying efficiency and drying uniformity of device to polyacrylamide, and the heat of the hot air exhausted by heated spiral stirring vane and air distribution plate all come from the heat-conducting oil in first heat-insulating tube, to improve the heat utilization rate of heat-conducting oil.

Description

Technical Field

[0001] This utility model belongs to the field of drying equipment technology, specifically a polyacrylamide drying device. Background Technology

[0002] In the hydrometallurgical process of laterite nickel ore, polyacrylamide is widely used as a flocculant. Its function is to aggregate fine particles in the slurry through adsorption and bridging, accelerating the solid-liquid separation process and improving nickel extraction efficiency. However, the used polyacrylamide solution has a high water content and needs to be dried for recycling or proper disposal.

[0003] Traditional drying methods have several problems: 1. Low drying efficiency: Conventional hot air drying equipment, such as chamber dryers, has a limited contact area between air and material, resulting in low heat transfer efficiency. The moisture in the polyacrylamide solution evaporates slowly, making it difficult to meet the drying efficiency requirements of large-scale hydrometallurgical production of laterite nickel ore. 2. Uneven drying: For polyacrylamide, a material with a certain degree of viscosity, localized overheating or over-drying can easily occur during the drying process, leading to a decline in material quality and affecting its reusability. Therefore, we propose a polyacrylamide drying device. Utility Model Content

[0004] The purpose of this invention is to provide a polyacrylamide drying device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a polyacrylamide drying device, comprising a rotating shaft and an air duct, wherein a spiral stirring blade is provided on the outer wall of the rotating shaft, and a drain port and a liquid inlet are respectively provided on the left and right sides of the rotating shaft, and a liquid delivery channel is provided inside the spiral stirring blade, wherein the liquid inlet and liquid outlet of the liquid delivery channel are respectively connected to the liquid inlet and liquid outlet of the rotating shaft, a second sleeve and a first sleeve are respectively sleeved on the left and right sides of the outer wall of the rotating shaft, and a first insulation pipe is connected to the right side of the first sleeve through a flange, wherein a spiral heat exchange pipe is provided inside the air duct, and the liquid inlet of the spiral heat exchange pipe is connected to the second insulation pipe, wherein the liquid inlet of the second insulation pipe penetrates the top of the air duct and the left side of the first insulation pipe, and is located inside the first insulation pipe.

[0006] Preferably, the liquid outlet of the spiral heat exchange tube is connected to a conveying pipe, the liquid outlet of the conveying pipe passes through the left side of the air duct and is connected to the second sleeve pipe, the bottom left side of the air duct is connected to a gas supply pipe, a box cover is provided at the bottom of the air duct, the gas supply pipe is located at the bottom of the box cover, the gas inlet of the gas supply pipe passes through the top of the box cover and is connected to the air duct, a gas distribution plate is evenly connected to the bottom of the gas supply pipe, and a drying box is fixedly connected to the bottom of the box cover by bolts.

[0007] Preferably, the second sleeve and the first sleeve are located on the left and right sides of the drying box, respectively, the rotating shaft is located inside the drying box, a set of through holes are opened on both the left and right sides of the drying box, and two sets of through holes are opened on the left and right sides of the rotating shaft, respectively.

[0008] Preferably, a set of support plates is provided on both the front and rear sides of the second sleeve and the first sleeve. The support plates are evenly distributed on the left and right sides of the drying chamber. A second toothed ring is provided on the outer side of the rotating shaft. The second toothed ring is located on the right side of the drying chamber. A support frame is provided on the right side of the drying chamber. A servo motor is provided on the inner side of the support frame. A first toothed ring is provided on the outer side of the output end of the servo motor. The first toothed ring is located on top of the second toothed ring and meshes with the second toothed ring.

[0009] Preferably, a first sealing ring is installed in the through hole of the drying oven, and the first sealing ring is sleeved on the outside of the rotating shaft. A set of second sealing rings is installed on the inside of both the second sleeve and the first sleeve, and the second sealing rings are sleeved on the outside of the rotating shaft.

[0010] Preferably, the bottom of the drying chamber is connected to a discharge valve, and the top of the chamber cover is connected to an inlet valve and an exhaust valve.

[0011] Compared with the prior art, the beneficial effects of this utility model are: the polyacrylamide is stirred and heated by the heated spiral stirring blades, and high-temperature hot air is evenly introduced into the drying chamber by the air distribution plate, thereby improving the drying efficiency and uniformity of the device for polyacrylamide. Furthermore, the heat of the hot air discharged from the heated spiral stirring blades and the air distribution plate comes from the heat transfer oil in the first heat-insulating pipe, thereby improving the heat utilization rate of the heat transfer oil. Attached Figure Description

[0012] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0013] In the attached diagram:

[0014] Figure 1 This is a schematic diagram of the structure of a polyacrylamide drying device according to the present invention;

[0015] Figure 2 This is a front sectional view of a polyacrylamide drying device according to the present invention;

[0016] Figure 3 This utility model Figure 2 Enlarged view of part A.

[0017] In the diagram: 1. Drying oven; 11. Support frame; 12. Support plate; 13. Servo motor; 14. First sleeve; 15. First insulation pipe; 16. Second insulation pipe; 17. Air duct; 18. Conveying pipe; 19. Second sleeve; 2. Spiral heat exchanger tube; 21. Gas conveying pipe; 22. Gas distribution plate; 23. Box cover; 24. First toothed ring; 25. Second toothed ring; 26. Rotating shaft; 27. Spiral stirring blade; 3. First sealing ring; 31. Second sealing ring; 32. Exhaust valve; 33. Feed valve; 34. Discharge valve. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-3A polyacrylamide drying device includes a rotating shaft 26 and an air duct 17. A spiral stirring blade 27 is fixedly installed on the outer wall of the rotating shaft 26. A drain port and a liquid inlet are respectively opened on the left and right sides of the rotating shaft 26. A liquid delivery channel is opened inside the spiral stirring blade 27. The inlet and outlet of the liquid delivery channel are connected to the inlet and drain port of the rotating shaft 26, respectively. When heat transfer oil enters the inlet of the rotating shaft 26, it enters the liquid delivery channel of the spiral stirring blade 27 through the inlet, thereby heating the spiral stirring blade 27. When the rotating shaft 26 rotates, it drives the spiral stirring blade 27 to stir and heat the polyacrylamide, thereby improving the drying efficiency. When the heat transfer oil flows to the left in the liquid delivery channel of the spiral stirring blade 27, it is stirred by the spiral stirring blade. The liquid outlet of the agitator blade 27 flows into the drain outlet of the rotating shaft 26. A second sleeve 19 and a first sleeve 14 are respectively fitted onto the left and right sides of the outer wall of the rotating shaft 26. A first insulation pipe 15 is connected to the right side of the first sleeve 14 via a flange. A spiral heat exchanger 2 is fixedly installed inside the air duct 17. The inlet of the spiral heat exchanger 2 is connected to a second insulation pipe 16. The inlet of the second insulation pipe 16 penetrates the top of the air duct 17 and the left side of the first insulation pipe 15, located inside the first insulation pipe 15. The outlet of the spiral heat exchanger 2 is connected to a conveying pipe 18. The outlet of the conveying pipe 18 penetrates the left side of the air duct 17 and connects to the second sleeve 19, connecting the first insulation pipe 15 to the conveying pump on the external heat transfer oil heater. When the heat transfer oil enters the first insulation pipe 15, it will... The heat transfer oil is fed into the inlet of the rotating shaft 26 through the first insulation pipe 15 and the first sleeve 14. Simultaneously, some of the heat transfer oil inside the first insulation pipe 15 enters the spiral heat exchanger 2 through the second insulation pipe 16. At this time, the air duct 17 is connected to an external fan. When air enters the air duct 17, it comes into contact with and is heated by the spiral heat exchanger 2. An air supply pipe 21 is connected to the bottom left side of the air duct 17. A box cover 23 is fixedly installed at the bottom of the air duct 17. The air supply pipe 21 is fixedly installed at the bottom of the box cover 23. The air inlet of the air supply pipe 21 passes through the top of the box cover 23 and connects to the air duct 17. An air distribution plate 22 is evenly connected to the bottom of the air supply pipe 21. The heated air enters the air distribution plate 22 through the air supply pipe 21 and is heated by the air distribution plate 22. 2. The polyacrylamide in the drying chamber 1 is dried evenly by being discharged into the drying chamber 1. At the same time, the heat transfer oil in the spiral heat exchange tube 2 moves to the left and is discharged into the second sleeve 19 through the conveying pipe 18. The heat transfer oil in the drain port of the rotating shaft 26 also enters the second sleeve 19. Then the second sleeve 19 is connected to the inlet of the external heat transfer oil heater so that the heat transfer oil can flow back into the external heat transfer oil heater for heating. The bottom of the chamber cover 23 is fixedly connected to the drying chamber 1 by bolts. The second sleeve 19 and the first sleeve 14 are located on the left and right sides of the drying chamber 1, respectively. The rotating shaft 26 is located inside the drying chamber 1. A set of through holes is opened on both the left and right sides of the drying chamber 1. Two sets of through holes are opened on the left and right sides of the rotating shaft 26, respectively.

[0020] A set of support plates 12 are fixedly installed on both the front and rear sides of the second sleeve 19 and the first sleeve 14. The support plates 12 are evenly fixed on the left and right sides of the drying chamber 1. A second toothed ring 25 is fixedly installed on the outer side of the rotating shaft 26. The second toothed ring 25 is located on the right side of the drying chamber 1. A support frame 11 is fixedly installed on the right side of the drying chamber 1. A servo motor 13 is fixedly installed on the inner side of the support frame 11. A first toothed ring 24 is fixedly installed on the outer side of the output end of the servo motor 13. The first toothed ring 24 is located on top of the second toothed ring 25 and meshes with the second toothed ring 25. The servo motor 13 drives the first toothed ring 24 to rotate, and the first toothed ring 24 drives the second toothed ring 25 to rotate. In this way, the second toothed ring 25 drives the rotating shaft 26 to rotate within the drying chamber 1, the first sleeve 14, and the second sleeve 19. The drying chamber 1 has a first sealing ring 3 installed in the through hole, which is fitted onto the outside of the rotating shaft 26. A second sealing ring 31 is installed on the inside of both the second sleeve 19 and the first sleeve 14, and is fitted onto the outside of the rotating shaft 26. The first sealing ring 3 seals the connection gap between the drying chamber 1 and the rotating shaft 26, and the second sealing ring 31 seals the connection gap between the rotating shaft 26 and the first sleeve 14 and the second sleeve 19. The first sealing ring 3 and the second sealing ring 31 must be wear-resistant and high-temperature resistant sealing rings. The bottom of the drying chamber 1 is connected to a discharge valve 34, and the top of the chamber cover 23 is connected to an inlet valve 33 and an exhaust valve 32. The inlet valve 33, discharge valve 34, and exhaust valve 32 are responsible for feeding, discharging, and venting respectively, which will not be elaborated upon here.

[0021] Working principle: The first sealing ring 3 seals the connection gap between the drying chamber 1 and the rotating shaft 26, and the second sealing ring 31 seals the connection gap between the rotating shaft 26 and the first sleeve 14 and the second sleeve 19. The first sealing ring 3 and the second sealing ring 31 should be wear-resistant and high-temperature resistant sealing rings. The feed valve 33, the discharge valve 34 and the exhaust valve 32 are responsible for feeding, discharging and exhausting respectively, which will not be elaborated here.

[0022] The servo motor 13 drives the first gear ring 24 to rotate, which in turn drives the second gear ring 25 to rotate. This, in turn, drives the rotating shaft 26 to rotate within the drying chamber 1, the first sleeve 14, and the second sleeve 19. The first insulation pipe 15 is connected to the delivery pump on the external heat transfer oil heater. When heat transfer oil enters the first insulation pipe 15, it flows through the first insulation pipe 15 and the first sleeve 14 into the inlet of the rotating shaft 26. After entering the inlet of the rotating shaft 26, the heat transfer oil flows through the inlet of the spiral stirring blade 27 into the delivery channel of the spiral stirring blade 27, thus heating the spiral stirring blade 27. When the rotating shaft 26 rotates, it drives the spiral stirring blade 27 to stir and heat the polyacrylamide, thereby improving drying efficiency. When the heat transfer oil flows to the left in the delivery channel of the spiral stirring blade 27, it flows through the spiral stirring blade... The liquid outlet of 27 flows into the drain outlet of the rotating shaft 26. At the same time, some of the heat transfer oil in the first insulation pipe 15 will enter the spiral heat exchanger 2 through the second insulation pipe 16. At this time, the air duct 17 is connected to the external fan. When the air enters the air duct 17, it will come into contact with the spiral heat exchanger 2 and be heated by the spiral heat exchanger 2. The heated air will enter the air distribution plate 22 through the air supply pipe 21 and be evenly discharged into the drying box 1 by the air distribution plate 22 to dry the polyacrylamide in the drying box 1. At the same time, the heat transfer oil in the spiral heat exchanger 2 will move to the left and be discharged into the second sleeve 19 through the delivery pipe 18. The heat transfer oil in the drain outlet of the rotating shaft 26 will also enter the second sleeve 19. Then the second sleeve 19 is connected to the liquid inlet of the external heat transfer oil heater, so that the heat transfer oil can flow back into the external heat transfer oil heater for heating.

Claims

1. A polyacrylamide drying apparatus, characterized by, The device includes a rotating shaft (26) and an air duct (17). The outer wall of the rotating shaft (26) is provided with a spiral stirring blade (27). The left and right sides of the rotating shaft (26) are respectively provided with a drain port and a liquid inlet. The spiral stirring blade (27) is provided with a liquid delivery channel. The liquid inlet and outlet of the liquid delivery channel are respectively connected to the liquid inlet and the liquid outlet of the rotating shaft (26). The left and right sides of the outer wall of the rotating shaft (26) are respectively fitted with a second sleeve (19) and a first sleeve (14). The right side of the first sleeve (14) is connected to a first insulation pipe (15) through a flange. The air duct (17) is provided with a spiral heat exchange tube (2). The liquid inlet of the spiral heat exchange tube (2) is connected to a second insulation pipe (16). The liquid inlet of the second insulation pipe (16) passes through the top of the air duct (17) and the left side of the first insulation pipe (15) and is located inside the first insulation pipe (15).

2. The polyacrylamide drying apparatus according to claim 1, characterized in that: The liquid outlet of the spiral heat exchange tube (2) is connected to the conveying pipe (18). The liquid outlet of the conveying pipe (18) passes through the left side of the air duct (17) and is connected to the second sleeve (19). The bottom left side of the air duct (17) is connected to the gas supply pipe (21). The bottom of the air duct (17) is provided with a box cover (23). The gas supply pipe (21) is located at the bottom of the box cover (23). The air inlet of the gas supply pipe (21) passes through the top of the box cover (23) and is connected to the air duct (17). The bottom of the gas supply pipe (21) is evenly connected to the gas distribution plate (22). The bottom of the box cover (23) is fixedly connected to the drying box (1) by bolts.

3. The polyacrylamide drying apparatus according to claim 2, characterized in that: The second sleeve (19) and the first sleeve (14) are located on the left and right sides of the drying box (1), respectively. The rotating shaft (26) is located inside the drying box (1). A set of through holes is opened on both the left and right sides of the drying box (1). Two sets of through holes are opened on the left and right sides of the rotating shaft (26).

4. The polyacrylamide drying apparatus according to claim 3, characterized in that: A set of support plates (12) are provided on both the front and rear sides of the second sleeve (19) and the first sleeve (14). The support plates (12) are evenly arranged on the left and right sides of the drying box (1). A second toothed ring (25) is provided on the outer side of the rotating shaft (26). The second toothed ring (25) is located on the right side of the drying box (1). A support frame (11) is provided on the right side of the drying box (1). A servo motor (13) is provided on the inner side of the support frame (11). A first toothed ring (24) is provided on the outer side of the output end of the servo motor (13). The first toothed ring (24) is located on the top of the second toothed ring (25) and meshes with the second toothed ring (25).

5. A polyacrylamide drying apparatus according to claim 3, characterized in that: A first sealing ring (3) is installed in the through hole of the drying oven (1). The first sealing ring (3) is sleeved on the outside of the rotating shaft (26). A set of second sealing rings (31) is installed on the inside of the second sleeve (19) and the first sleeve (14). The second sealing rings (31) are sleeved on the outside of the rotating shaft (26).

6. The polyacrylamide drying apparatus according to claim 2, characterized in that: The bottom of the drying chamber (1) is connected to a discharge valve (34), and the top of the chamber cover (23) is connected to an inlet valve (33) and an exhaust valve (32).

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