Polyacrylamide low-temperature drying device

Abstract

The utility model relates to the technical field of chemical material drying, and particularly discloses a polyacrylamide low-temperature drying device which comprises a drying tank body, a rotary drying sieve is rotatably arranged in the drying tank body, an auger is arranged at the top of the drying tank body, and the auger penetrates through the rotary drying sieve and extends to the bottom of the drying tank body. A discharging channel is formed between the rotary drying screen and the auger, and a vibration guiding assembly is arranged between the auger and the rotary drying screen. The rotary drying sieve rotates in the drying tank body, so that polyacrylamide particles contained in the rotary drying sieve can be heated more uniformly, and the auger is arranged, so that the polyacrylamide particles falling into the bottom of the drying tank body can be conveyed to the upper part of the drying tank body, namely the upper part of the rotary drying sieve, through the auger; and through repeated conduction, the heating effect of the polyacrylamide particles can be improved, and then the drying efficiency of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drying chemical materials, in particular to a low-temperature drying device for polyacrylamide. Background Art

[0002] Polyacrylamide is a linear high molecular polymer. It is a hard glassy solid at room temperature and has good thermal stability. Polyacrylamide is widely used as a lubricant, suspending agent, clay stabilizer, oil displacement agent, fluid loss reducer and thickener in drilling, acidizing, fracturing, water plugging, cementing, secondary oil recovery and tertiary oil recovery. It is an extremely important oilfield chemical.

[0003] In the process of processing and producing polyacrylamide, it needs to be dried. It is heated to a certain temperature by heating equipment to evaporate the water inside. At the same time, the moisture in the device is discharged through ventilation equipment to ensure the drying effect.

[0004] During the high-temperature drying process of polyacrylamide colloidal particles at 105 degrees Celsius, the cross-linking will be difficult to dissolve and the molecular weight will degrade. During the whole process, the temperature needs to be strictly controlled. Although low-temperature drying can avoid the problem of high-temperature decomposition, it will lead to prolonged drying time and reduced production efficiency. In order to solve the above problems, we propose a low-temperature drying device for polyacrylamide. Utility Model Content

[0005] The purpose of the utility model is to provide a low-temperature drying device for polyacrylamide with a high drying rate, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a polyacrylamide low-temperature drying device, comprising a drying tank body, a rotary drying screen rotatably arranged in the drying tank body, an auger arranged on the top of the drying tank body, the bottom of the auger passing through the rotary drying screen and slidably connected thereto, the feed end of the auger extending to the bottom of the drying tank body, a material dropping channel formed between the rotary drying screen and the outer shell of the auger, and a vibration guide component for guiding the rotary drying screen to vibrate up and down is arranged between the outer shell of the auger and the rotary drying screen.

[0007] According to the above technical solution, the inner wall of the drying tank body is rotatably connected with a rotating ring, and the outer edge of the rotary drying screen is slidably connected to the inner wall of the rotating ring.

[0008] According to the above technical solution, a gear connected to an external motor is rotatably provided on the inner wall of the drying tank body, and teeth meshing with the gear are provided on the rotating ring.

[0009] According to the above technical solution, a guide rail is fixedly connected to the inner wall of the rotating ring, and a slide groove matched with the guide rail is provided on the outer edge of the rotary drying screen.

[0010] According to the above technical solution, a sliding sleeve is slidably sleeved on the outer wall of the auger, and the sliding sleeve is fixedly connected to the rotary drying screen through a support rod. The vibration guide assembly includes a guide cylinder fixedly sleeved on the outer wall of the auger, and a guide rod matching the guide surface of the guide cylinder is fixedly connected to the bottom of the sliding sleeve.

[0011] According to the above technical solution, a roller is rotatably mounted on the bottom of the guide rod, and the roller is rollingly connected to the guide surface of the guide cylinder.

[0012] According to the above technical solution, a material guide piece inclined away from the auger is fixedly connected to the outer wall of the sliding sleeve, and a falling ring channel is circumferentially provided at the lower end of the outer wall of the material guide piece.

[0013] According to the above technical solution, leakage holes are distributed on the outer wall of the material guiding member.

[0014] According to the above technical solution, the bottom of the drying tank body is connected to a collecting bottom trough, and the feed end of the auger extends to the bottom of the collecting bottom trough.

[0015] According to the above technical solution, the inner bottom wall of the rotary drying screen is inclined toward the material dropping channel. Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model arranges a rotary drying screen to rotate in the drying tank body, so that the polyacrylamide particles contained in the rotary drying screen can be heated more evenly. By arranging an auger, the polyacrylamide particles falling into the bottom of the drying tank body can enter the auger through the feeding end of the auger and be transmitted to the upper part of the drying tank body, that is, above the rotary drying screen, and then continue to fall into the rotary drying screen. Such repeated conduction can improve the heating effect of the polyacrylamide particles, thereby improving the drying efficiency of the device.

[0017] The utility model is provided with a vibration guide component, so that the rotary drying screen can vibrate up and down under the cooperation of the guide rod and the guide cylinder, so that the rotary drying screen produces a vibration effect, thereby causing the polyacrylamide particles in the rotary drying screen to bump up and down, so that the polyacrylamide particles will not be stacked together, indirectly increasing the heating area of ​​the polyacrylamide particles, further improving the heating effect of the polyacrylamide particles, and then improving the drying efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the drying device of the utility model;

[0019] Figure 2It is a cross-sectional view of the drying device of the utility model;

[0020] Figure 3 It is a schematic diagram of the guide cylinder of the utility model;

[0021] Figure 4 This utility model Figure 2 A magnified schematic diagram of the middle part;

[0022] Figure 5 This utility model Figure 2 Enlarged schematic diagram of part B in the middle.

[0023] In the figure: 1. Drying tank body; 2. Rotary drying screen; 3. Auger; 4. Vibration guide assembly; 41. Guide cylinder; 42. Guide rod; 43. Roller; 5. Rotating ring; 6. Gear; 7. Guide rail; 8. Sliding sleeve; 9. Material guide; 11. Collecting bottom trough; 12. Thermal insulation cotton. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5 The utility model provides a technical solution: a polyacrylamide low-temperature drying device, including a drying tank body 1, a heating device and a ventilation device are arranged in the drying tank body 1 (this is the prior art and will not be described in detail here), a feeding port is arranged on the side wall of the drying tank body 1, materials are fed into the drying tank body 1 through the feeding port, a rotary drying screen 2 is arranged in the drying tank body 1, polyacrylamide particles are contained in the rotary drying screen 2, the rotary drying screen 2 drives the polyacrylamide particles to rotate, and the polyacrylamide particles contained in the rotary drying screen 2 can be heated more evenly.

[0026] An auger 3 is provided on the top of the drying tank body 1, and the bottom of the auger 3 passes through the rotary drying screen 2 and is slidably connected thereto, and the feed end of the auger 3 extends to the bottom of the drying tank body 1, and a drop channel is formed between the rotary drying screen 2 and the outer shell of the auger 3. As the rotary drying screen 2 rotates, the polyacrylamide particles contained in the rotary drying screen 2 will slide along the inclined bottom wall of the rotary drying screen 2, and fall into the bottom of the drying tank body 1 through the drop channel. By providing the auger 3, the polyacrylamide particles falling into the bottom of the drying tank body 1 can enter the interior of the auger 3 through the feed end of the auger 3, and be transmitted to the upper part of the drying tank body 1, that is, above the rotary drying screen 2, and then continue to fall into the rotary drying screen 2. Such repeated conduction can improve the heating effect of the polyacrylamide particles, thereby improving the drying efficiency of the device.

[0027] A vibration guide component 4 is provided between the outer shell of the auger 3 and the rotary drying screen 2, which makes the rotary drying screen 2 vibrate up and down. As the rotary drying screen 2 rotates, the rotary drying screen 2 will move up and down along the outer wall of the auger 3 under the guidance of the vibration guide component 4, and at the same time produce a vibration effect, thereby making the polyacrylamide particles in the rotary drying screen 2 bump up and down, so that the polyacrylamide particles will not be stacked together, indirectly increasing the heating area of ​​the polyacrylamide particles, further improving the heating effect of the polyacrylamide particles, and thus improving the drying efficiency of the device.

[0028] Specifically, the inner wall of the drying tank body 1 is rotatably connected with a rotating ring 5, the inner wall of the drying tank body 1 is fixedly connected with an annular slide rail, the outer wall of the rotating ring 5 is fixedly connected with a slip ring, the slip ring slides in the annular slide rail, so that the rotating ring 5 rotates in the drying tank body 1, and the outer edge of the rotary drying screen 2 is slidably connected with the inner wall of the rotating ring 5. As the rotary drying screen 2 rotates, the rotary drying screen 2 will move up and down along the outer wall of the auger 3 under the guidance of the vibration guide assembly 4, so the rotary drying screen 2 will slide up and down along the inner wall of the rotating ring 5, playing a guiding role. The upper and lower surfaces of the rotating ring 5 close to the side of the rotary drying screen 2 are integrally formed with limiting protrusions, which play a role in limiting the rotary drying screen 2.

[0029] Specifically, the inner wall of the drying tank body 1 is rotatably provided with a gear 6 connected to an external motor, a connecting ring is fixedly connected between the rotating ring 5 and the slip ring, and the lower end of the connecting ring is provided with teeth meshing with the gear 6. The external motor can drive the gear 6 to rotate, and then the connecting ring drives the rotating ring 5 to rotate, and finally realizes the rotation of the rotary drying screen 2.

[0030] Specifically, the inner wall of the rotating ring 5 is fixed with a guide rail 7, and the outer edge of the rotary drying screen 2 is provided with a slide groove adapted to the guide rail 7 to play a guiding role. The rotary drying screen 2 can move up and down along the guide rail 7, and at the same time, the rotary drying screen 2 can rotate with the rotating ring 5.

[0031] Specifically, the outer wall of the auger 3 is slidably sleeved with a sliding sleeve 8, and the sliding sleeve 8 is fixedly connected to the rotary drying screen 2 through a support rod. The sliding sleeve 8 can drive the rotary drying screen 2 to move up and down along the outer wall of the auger 3. The vibration guide assembly 4 includes a guide cylinder 41 fixedly sleeved on the outer wall of the auger 3. The guide cylinder 41 is as shown in FIG. Figure 3 As shown, it is a hollow cylinder-like body, the top surface of the guide cylinder 41 is a gradually rising arc surface, and a guide rod 42 matched with the guide surface of the guide cylinder 41 is fixed to the bottom of the sliding sleeve 8. The guide rod 42 can slide along the top surface of the guide cylinder 41. The guide rod 42 rotates from the lowest point on the top surface of the guide cylinder 41 to the highest point (the lowest point is located directly below the highest point, and there is a certain height difference between the lowest point and the highest point), completing a circle of rotation. Driven by the continued rotation of the sliding sleeve 8, the guide rod 42 will lose the support of the top surface of the guide cylinder 41. Driven by the gravity of the rotary drying screen 2, it quickly falls to the lowest point, and at the same time, the rotary drying screen 2 quickly falls. When the guide rod 42 falls to the lowest point, the guide rod 42 will contact the top surface of the guide cylinder 41 to generate vibration, which is transmitted to the rotary drying screen 2, causing the rotary drying screen 2 to produce a vibration effect, thereby causing the polyacrylamide particles in the rotary drying screen 2 to bump up and down, so that the polyacrylamide particles will not be stacked together, thereby increasing the heating area of ​​the polyacrylamide particles, further improving the heating effect of the polyacrylamide particles, and thereby improving the drying efficiency of the device.

[0032] Specifically, a roller 43 is rotatably mounted on the bottom of the guide rod 42 , and the roller 43 is rollingly connected to the guide surface of the guide cylinder 41 , thereby improving the stability and durability of the device.

[0033] Specifically, the outer wall of the sliding sleeve 8 is fixedly connected with a material guide member 9 inclined away from the auger 3. A falling loop is circumferentially arranged at the bottom end of the outer wall of the material guide member 9. The material guide member 9 is in the shape of an inverted funnel, which can disperse and guide the polyacrylamide particles to the surroundings, and drop them on the rotary drying screen 2 away from the center through the circumferential falling loop, further increasing the heating area of ​​the polyacrylamide particles, improving the heating effect of the polyacrylamide particles, and thereby improving the drying efficiency of the device.

[0034] The polyacrylamide particles in the drying tank body 1 circulate up and down, and when falling, they show a "Z"-shaped direction under the guidance of the guide member 9 and the rotary drying screen 2. In the process of falling, the polyacrylamide particles move in a dispersed manner, so that the polyacrylamide particles are evenly heated.

[0035] Specifically, the outer wall of the material guide member 9 is provided with leakage holes, which further increases the heating area of ​​the polyacrylamide particles.

[0036] Specifically, the bottom of the drying tank body 1 is arranged in an arc shape, and the bottom of the drying tank body 1 is connected to a collecting bottom trough 11. The collecting bottom trough 11 and the drying tank body 1 are an integrally formed structure. The polyacrylamide particles falling into the bottom of the drying tank body 1 through the dropping channel will be collected in the collecting bottom trough 11, and the feeding end of the auger 3 extends to the bottom of the collecting bottom trough 11, so as to facilitate the transmission of the polyacrylamide particles.

[0037] Specifically, the inner bottom wall of the rotary drying screen 2 is inclined toward the material dropping channel.

[0038] Specifically, the outer wall of the drying tank body 1 is coated with heat-insulating cotton 12 to slow down the stable overflow of the drying tank body 1 and improve energy utilization.

[0039] Working principle:

[0040] When drying polyacrylamide, feed the material into the drying tank 1 through the feed inlet, and the polyacrylamide particles first fall on the material guide 9, which can disperse and guide the polyacrylamide particles to the surroundings and fall on the rotary drying screen 2 away from the center through the circumferential falling ring.

[0041] The external motor can drive the gear 6 to rotate, and then drive the rotating ring 5 to rotate, so that the rotary drying screen 2 rotates in the drying tank body 1, and then drives the sliding sleeve 8 to rotate. As the sliding sleeve 8 rotates, the guide rod 42 slides along the top surface of the guide cylinder 41. Under the rotation driven by the sliding sleeve 8, the guide rod 42 slides from the lowest point of the top surface of the guide cylinder 41 to the highest point. Under the continued rotation of the sliding sleeve 8, the guide rod 42 will lose the support of the top surface of the guide cylinder 41, and driven by the gravity of the rotary drying screen 2, it will quickly fall to the lowest point, and at the same time, the rotary drying screen 2 will fall quickly. When the guide rod 42 falls to the lowest point, the guide rod 42 will contact with the top surface of the guide cylinder 41, generate vibration, and transmit it to the rotary drying screen 2, so that the rotary drying screen 2 produces a vibration effect, and then the polyacrylamide particles in the rotary drying screen 2 bump up and down, so that the polyacrylamide particles will not be stacked together, the heating area of ​​the polyacrylamide particles is increased, the heating effect of the polyacrylamide particles is improved, and the drying efficiency of the device is improved.

[0042] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A polyacrylamide low-temperature drying device, comprising a drying tank (1), characterized in that: A rotary drying screen (2) is rotatably arranged in the drying tank body (1), an auger (3) is arranged on the top of the drying tank body (1), the bottom of the auger (3) passes through the rotary drying screen (2) and is slidably connected thereto, the feeding end of the auger (3) extends to the bottom of the drying tank body (1), a material dropping channel is formed between the rotary drying screen (2) and the outer shell of the auger (3), and a vibration guide component (4) is arranged between the outer shell of the auger (3) and the rotary drying screen (2) to guide the rotary drying screen (2) to vibrate up and down.

2. The polyacrylamide low-temperature drying device according to claim 1, characterized in that: The inner wall of the drying tank body (1) is rotatably connected to a rotating ring (5), and the outer edge of the rotary drying screen (2) is slidably connected to the inner wall of the rotating ring (5).

3. The polyacrylamide low-temperature drying device according to claim 2, characterized in that: The inner wall of the drying tank body (1) is rotatably provided with a gear (6) connected to an external motor, and the rotating ring (5) is provided with teeth meshing with the gear (6).

4. The polyacrylamide low-temperature drying device according to claim 2, characterized in that: The inner wall of the rotating ring (5) is fixedly connected with a guide rail (7), and the outer edge of the rotary drying screen (2) is provided with a slide groove matched with the guide rail (7).

5. The polyacrylamide low-temperature drying device according to claim 1, characterized in that: The outer wall of the auger (3) is slidably sleeved with a sliding sleeve (8), and the sliding sleeve (8) is fixedly connected to the rotary drying screen (2) via a support rod. The vibration guide assembly (4) comprises a guide cylinder (41) fixedly sleeved on the outer wall of the auger (3), and the bottom of the sliding sleeve (8) is fixedly connected with a guide rod (42) that cooperates with the guide surface of the guide cylinder (41).

6. The polyacrylamide low-temperature drying device according to claim 5, characterized in that: A roller (43) is rotatably mounted on the bottom of the guide rod (42), and the roller (43) is rollingly connected to the guide surface of the guide cylinder (41).

7. The polyacrylamide low-temperature drying device according to claim 5, characterized in that: The outer wall of the sliding sleeve (8) is fixedly connected with a material guide member (9) which is inclined in a direction away from the auger (3), and a falling ring channel is provided in the circumferential direction of the bottom end of the outer wall of the material guide member (9).

8. The polyacrylamide low-temperature drying device according to claim 7, characterized in that: The outer wall of the material guiding member (9) is provided with leakage holes.

9. The polyacrylamide low-temperature drying device according to claim 1, characterized in that: The bottom of the drying tank body (1) is connected to a collecting bottom trough (11), and the feed end of the auger (3) extends to the bottom of the collecting bottom trough (11).

10. The polyacrylamide low-temperature drying device according to claim 1, characterized in that: The inner bottom wall of the rotary drying screen (2) is inclined toward the material dropping channel.

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