A resin particle and surface crosslinking agent mixing and heating system

Abstract

The application relates to the field of SAP production technology, and particularly relates to a resin particle and surface crosslinking agent mixing and heating system, which comprises a tank body, a feeding pipe for feeding resin particles into the tank body, a discharging pipe for discharging resin particles after surface crosslinking is completed, an air inlet pipe for feeding hot air flow into the tank body, an air outlet pipe for discharging the hot air flow from the tank body, an atomizing nozzle for spraying surface crosslinking agent to the resin particles, a detection box located outside the tank body and communicated with the inside of the tank body, a camera module arranged in the detection box, a rotating shaft rotatably connected to the open inner wall of one end of the tank body, a material collecting platform fixedly connected to the rotating shaft and capable of collecting resin particles in the tank body to provide the camera module with resin particle images, and a rotating shaft motor arranged on the detection box and capable of driving the rotating shaft to rotate, so that the material collecting platform rotates after the camera module completes image acquisition, the resin particles on the material collecting platform can be replaced, the resin particles acquired by the camera module each time are different, and the adjustment accuracy of the fluidized bed is improved.

Description

Technical Field

[0001] This application relates to the field of SAP production technology, and in particular to a heating system for mixing resin particles and surface crosslinking agents. Background Technology

[0002] SAP, or super absorbent resin particles, is produced through processes including polymerization, granulation, drying, crushing, and grinding. After grinding, the resulting resin particles need to be mixed and heated with a surface crosslinking agent to improve the mechanical strength and water absorption of the final resin particle product. For example, CN117164957A discloses a surface crosslinking agent for super absorbent resin and a super absorbent resin modified therefrom.

[0003] Among the equipment used for surface crosslinking of resin particles, fluidized bed reactors are well-suited for large-scale production. For example, the fluidized bed-based nano-spray coating system disclosed in CN117181136A feeds resin particles into a tank, while hot air is introduced into the bottom of the tank to keep the resin particles in a suspended state. Atomized surface crosslinking agent is sprayed from the atomizing nozzle to allow the resin particles and the surface crosslinking agent to react. Furthermore, a camera module is installed inside the tank to monitor the progress of the reaction and the coating status of the resin particles in real time.

[0004] Regarding the aforementioned technologies, resin particles need to first enter the carrier box and fall onto the collection platform before the camera module can acquire a clear image of the resin particles on the collection platform. However, once the resin particles enter the carrier box, they are not easily ejected, resulting in low reference value for the images of resin particles acquired by the camera module. This makes it difficult to accurately reflect the coating situation of the resin particles inside the tank, and the accuracy of fluidized bed adjustment is also low. Summary of the Invention

[0005] To enable more precise adjustment of the fluidized bed, this application provides a heating system for mixing resin particles and surface crosslinking agents.

[0006] The technical solution of the mixed heating system of resin particles and surface crosslinking agent provided in this application is as follows.

[0007] A resin particle and surface crosslinking agent mixing and heating system includes a tank, a feed pipe for feeding resin particles into the tank, a discharge pipe for discharging surface-crosslinked resin particles, an air inlet pipe for feeding hot air into the tank, an air outlet pipe for discharging hot air out of the tank, and an atomizing nozzle for spraying surface crosslinking agent onto the resin particles. The tank is internally connected to a detection box located outside the tank. The detection box contains a camera module. A rotating shaft is rotatably connected to the inner wall of one end opening of the detection box. The rotating shaft is fixedly connected to a collection platform that can collect resin particles inside the tank for the camera module to acquire images of the resin particles. The detection box is equipped with a rotating shaft motor that drives the rotating shaft to rotate.

[0008] By adopting the above technical solution, after the camera module completes one image acquisition, the collection platform rotates so that the resin particles whose images have been acquired can fall off the rotating collection platform. After the collection platform completes its rotation and reset, the resin particles on the collection platform are less likely to be the same as before. This allows the image of the resin particles acquired by the camera module to more accurately reflect the overall coating of resin particles in the tank, so as to make accurate adjustments to the fluidized bed.

[0009] Optionally, the axis of rotation of the rotating shaft is perpendicular to the optical axis of the camera module, and the axis of rotation of the rotating shaft is horizontal.

[0010] By adopting the above technical solution, the rotation of the collecting platform around the horizontal line can fully replace the resin particles in the image to be acquired, and the collecting platform can acquire resin particles at different heights inside the tank.

[0011] Optionally, four axes of rotation of the material collection platform are evenly arranged around the rotating shaft.

[0012] By adopting the above technical solution, when resin particles on one collection platform are facing the camera module to obtain images of the resin particles, the two adjacent collection platforms can block the airflow, so as to minimize the movement of resin particles on the corresponding collection platform and improve the image quality and stability of the camera module as much as possible.

[0013] Optionally, the detection box has a return arc surface formed on the side away from the camera module, and the material collection platform can be close to the return arc surface on the side away from the rotating shaft.

[0014] By adopting the above technical solution, it is possible to prevent resin particles from accumulating at the bottom of the test box.

[0015] Optionally, the two opposing aggregate platforms can be positioned close to the inner wall of the opening connecting the detection box to the tank to prevent resin particles inside the tank from entering the detection box.

[0016] By adopting the above technical solution, the disturbance of the airflow inside the tank to the resin particles on the collection platform facing the camera module can be minimized.

[0017] Optionally, a baffle plate is fixedly connected to the periphery of the front surface of the material collection platform in accordance with the rotation direction of the rotating shaft.

[0018] By adopting the above technical solution, the collecting platform can bring a relatively large number of resin particles into the testing box during the process of rotating around the horizontal line.

[0019] Optionally, the rotation axis of the rotating shaft is parallel to the optical axis of the camera module, the camera module is located on the upper part of the detection box and the optical axis of the camera module is vertical.

[0020] By adopting the above technical solution, the aggregate platform can acquire resin particles over the largest possible range within the horizontal plane.

[0021] Optionally, the material collection platform has at least three axes of rotation evenly arranged around the rotating shaft.

[0022] By adopting the above technical solutions, multiple material collection platforms enable the camera module to acquire images of resin particles more efficiently, so as to make a more timely judgment on the coating of resin particles.

[0023] Optionally, a sealing plate is fixedly connected to the rear side of the upper surface of the material collection platform in the direction of rotation of the rotating shaft.

[0024] By adopting the above technical solution, more resin particles can be moved to the position directly opposite the camera module when the collection platform rotates around a vertical line, so that the obtained resin particle images are more representative.

[0025] Optionally, the sealing sheet can be fitted to the inner wall of the opening of the detection box that connects to the tank.

[0026] By adopting the above technical solution, the random movement of resin particles in the detection box caused by airflow is reduced, so that the obtained resin particle images are clearer.

[0027] In summary, this application includes at least the following beneficial effects.

[0028] After the camera module completes an image acquisition, the collection platform rotates so that the resin particles whose images have been acquired can fall off the rotating collection platform. After the collection platform completes its rotation and reset, the resin particles on the collection platform are less likely to be the same as before. This allows the image of the resin particles acquired by the camera module to more accurately reflect the overall coating of resin particles in the tank, so as to make accurate adjustments to the fluidized bed. Attached Figure Description

[0029] Figure 1 This is a cross-sectional structural diagram of the tank in Embodiment 1 of this application;

[0030] Figure 2 This is a cross-sectional structural diagram of the detection box, rotating shaft, material collection platform, and enclosure plate in Embodiment 1;

[0031] Figure 3 This is a cross-sectional view of the detection box in Example 2.

[0032] Explanation of reference numerals in the attached drawings: 1. Tank body; 2. Feed pipe; 3. Discharge pipe; 4. Air inlet pipe; 5. Air outlet pipe; 51. Atomizing nozzle; 52. Detection box; 53. Camera module; 54. Rotating shaft; 55. Material collection platform; 56. Rotating shaft motor; 57. Return material arc surface; 58. Containment plate; 59. Sealing plate. Detailed Implementation

[0033] The present application will be further described in detail below with reference to the accompanying drawings. Example 1:

[0034] Embodiment 1 of this application discloses a heating system for mixing resin particles and a surface crosslinking agent, referring to... Figure 1 The system includes a vertically oriented tank 1. A feed pipe 2, connected to the upper periphery of the tank 1, feeds resin particles into the tank 1. A discharge pipe 3, connected to the lower periphery of the tank 1, discharges the surface-crosslinked resin particles out. An air inlet pipe 4, connected to an external air heater, is located at the center of the bottom of the tank 1, ensuring a constant upward flow of hot air within the tank 1. An outlet pipe 5, connected to the center of the upper part of the tank 1, discharges the hot air. A filter bag can be installed at the top of the tank 1 to prevent resin particles from being carried out of the tank 1 by the hot air, or the outlet pipe 5 can be connected to an external cyclone separator to separate the resin particles from the hot air exiting the tank 1 and return them to the tank 1. An atomizing nozzle 51 is fixedly connected to the inner wall of the tank 1. The atomizing nozzle 51 is connected to an external container holding the surface crosslinking agent and a pump to spray the surface crosslinking agent onto the resin particles in the tank 1.

[0035] Reference Figure 1 and Figure 2The outer wall of the tank 1 is detachably connected to and connected to a detection box 52. A camera module 53 with a vertical optical axis is detachably connected to the upper part of the detection box 52. A rotating shaft 54 ​​is rotatably connected to the inner wall of the opening of the detection box 52. A rotating shaft motor 56 is detachably connected to the outer wall of the detection box 52. Both the output shaft of the rotating shaft motor 56 and the rotating shaft 54 ​​can be detachably connected to gears and used in conjunction with a synchronous belt for power transmission. In this embodiment, the rotation axis of the rotating shaft 54 ​​is horizontal. Four material collection platforms 55 are evenly fixedly connected to the rotating shaft 54 ​​around its own axis. The surface of each material collection platform 55 in the thickness direction can be close to the inner wall of the opening of the detection box 52 connected to the tank 1 to appropriately reduce the airflow in the tank 1 from entering the detection box 52. Each collecting platform 55 has a baffle plate 58 fixedly connected to the periphery of the front surface in the direction of rotation of the rotating shaft 54. The baffle plate 58 is set at three sides around the periphery so that more resin particles can be brought into the detection box 52 when the collecting platform 55 rotates around the horizontal line.

[0036] Reference Figure 2 The bottom inner wall of the detection box 52 is formed with a return arc surface 57. As the horizontal collecting platform 55 inside the detection box 52 rotates downwards to become vertical, the end face of the collecting platform 55 away from the rotating shaft 54 ​​moves close to the return arc surface 57, so that resin particles are less likely to accumulate and remain at the bottom of the detection box 52. In addition, the lowest point of the camera module 53 is higher than the top of the opening of the detection box 52 connecting to the tank 1, so that the collecting platform 55 is less likely to touch the camera module 53 when rotating into the detection box 52.

[0037] The principle of the resin particle and surface crosslinking agent mixing heating system in Embodiment 1 of this application is as follows: the four collection platforms 55 rotate 90° around the horizontal line and stop for a predetermined time, so that the camera module 53 can clearly image the resin particles on the horizontal collection platforms 55 in the detection box 52. Example 2:

[0038] Embodiment 2 of this application discloses a heating system for mixing resin particles and a surface crosslinking agent, referring to... Figure 3 The difference from Embodiment 1 is that the rotation axis of the rotating shaft 54 ​​is vertical, and at least three material collection platforms 55 are evenly arranged around the rotation axis of the rotating shaft 54. In this embodiment, four material collection platforms 55 are arranged.

[0039] Reference Figure 3Each material collection platform 55 is horizontal. The horizontal cross-section of the inner wall of the detection box 52 is semi-circular and the center of the circle is located on the rotation axis of the rotating shaft 54. The end face of the material collection platform 55 moves close to the arc-shaped inner wall of the detection box 52. A sealing piece 59 is fixedly connected to the rear side of the upper surface of the material collection platform 55 in accordance with the rotation direction of the rotating shaft 54. The sealing piece 59 is vertical and the surface in the thickness direction can be close to the inner wall of the opening of the detection box 52 connected to the tank 1.

[0040] The principle of the resin particle and surface crosslinking agent mixing heating system in Embodiment 2 of this application is as follows: the four collecting platforms 55 rotate 90° around a vertical line and stop for a predetermined time, so that the camera module 53 can clearly image the resin particles on the horizontal collecting platforms 55 in the detection box 52. Furthermore, Embodiments 1 and 2 can be used separately or in combination on a tank 1, depending on the quality requirements of the resin particles, the performance of the camera module 53, and the external space of the tank 1.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A heating system for mixing resin particles and a surface crosslinking agent, comprising a tank (1), a feed pipe (2) for feeding resin particles into the tank (1), a discharge pipe (3) for discharging surface-crosslinked resin particles, an air inlet pipe (4) for feeding hot air into the tank (1), an air outlet pipe (5) for discharging hot air out of the tank (1), and an atomizing nozzle (51) for spraying the surface crosslinking agent onto the resin particles, characterized in that: The tank (1) is connected to a detection box (52) located outside the tank (1). The detection box (52) is equipped with a camera module (53). The detection box (52) is connected to a rotating shaft (54) at one end of the opening of the tank (1). The rotating shaft (54) is fixedly connected to a material collection platform (55) that can collect resin particles in the tank (1) for the camera module (53) to obtain images of the resin particles. The detection box (52) is equipped with a rotating shaft motor (56) that drives the rotating shaft (54) to rotate. The axis of rotation of the rotating shaft (54) is perpendicular to the optical axis of the camera module (53), and the axis of rotation of the rotating shaft (54) is horizontal.

2. The resin particle and surface crosslinking agent mixing heating system according to claim 1, characterized in that: The material collection platform (55) has four evenly arranged rotation axes around the rotating shaft (54).

3. The resin particle and surface crosslinking agent mixing heating system according to claim 2, characterized in that: The detection box (52) has a return arc surface (57) formed on the side away from the camera module (53), and the material collection platform (55) can be close to the return arc surface (57) on the side away from the rotating shaft (54).

4. The resin particle and surface crosslinking agent mixing heating system according to claim 3, characterized in that: The two material collection platforms (55) arranged opposite to each other can be close to the inner wall of the opening of the test box (52) and connected to the tank (1) to prevent resin particles in the tank (1) from entering the test box (52).

5. The resin particle and surface crosslinking agent mixing heating system according to claim 3, characterized in that: The material collection platform (55) has a baffle plate (58) fixedly connected to the periphery of the front surface in the direction of rotation of the rotating shaft (54).

Images