A precipitation granulator screening machine

Abstract

The application discloses a sedimentation granulation screening machine, and belongs to the technical field of granulation, which comprises a feeding pipe section, a sedimentation hardening pipe section, a cutting pipe section and a fluidized screening pipe section; the top end of the feeding pipe section is provided with a feeding port; the sedimentation hardening pipe section is connected to the bottom end of the feeding pipe section, and the side wall is provided with a poor solvent inlet; the feeding end of the cutting pipe section is connected to the sedimentation hardening pipe section, a cutting motor is fixedly installed outside the side wall of the cutting pipe section, and the motor shaft of the cutting motor is connected to a cutting knife after penetrating through the side wall of the cutting pipe section; the bottom end of the fluidized screening pipe section is connected to the discharging end of the cutting pipe section, and the top end or upper part of the fluidized screening pipe section is provided with a discharging port; a wire drawing plate is arranged between the feeding pipe section and the sedimentation hardening pipe section. The application has a compact structure, and has the functions of sedimentation, wire drawing, granulation and screening, that is, four functions in one, can continuously produce, has a small floor area, and the processing capacity can be adjusted; in addition, the whole operation is closed, and is friendly to personnel and the environment.

Description

Technical Field

[0001] This invention relates to the field of granulation technology, and in particular to a precipitation granulation and screening machine. Background Technology

[0002] High-viscosity polymers produced by solution polymerization usually require solvent removal (i.e., desolventizing) before the desired polymer can be obtained. There are two main methods of desolventizing: 1. Precipitation with a poor solvent; 2. Direct desolventizing (heating, vacuum, or vacuum + heating).

[0003] However, for high-boiling-point solvents, direct solvent removal is not feasible; precipitation is the only option. After precipitation, the polymer is granulated, washed, and dried to obtain the raw material for subsequent processes. Currently, the three process steps of precipitation, granulation, and screening require three different pieces of equipment: a precipitation reactor, a granulator, and a screening machine, respectively.

[0004] However, commercially available granulators are mainly designed for large-scale batch processing, so they have the advantage of large processing capacity. Correspondingly, they also have a large footprint and a large residual volume during production, making them unsuitable for use in intermittent small-batch production.

[0005] For materials produced in small batches, most are still processed intermittently by manual means, but this has the disadvantages of low production efficiency, large material loss, and being unfriendly to the health of operators and the environment. Summary of the Invention

[0006] The present invention addresses the problem that existing technologies for high-viscosity polymer granulation with small discharge still rely on manual intermittent processing, resulting in low efficiency and being unfriendly to personnel and the environment. The purpose of this invention is to provide a precipitation granulation and screening machine to at least partially solve the above problems.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows:

[0008] A precipitation granulation and screening machine, comprising:

[0009] The feed pipe section is arranged vertically and has a feed inlet at its top.

[0010] A precipitation hardening tube section is arranged vertically and connected to the bottom end of the feed tube section. The side wall of the precipitation hardening tube section is provided with a poor solvent inlet.

[0011] A cutting pipe section is provided, the feed end of which is connected to the precipitation and hardening pipe section. A cutting motor is fixedly installed on the outside of the side wall of the cutting pipe section, and a cutter is provided inside the cutting pipe section. The motor shaft of the cutting motor passes through the side wall of the cutting pipe section and is connected to the cutter.

[0012] A fluidized screen section is arranged vertically, with its bottom end connected to the discharge end of the cutting section, and a discharge port provided at its top or upper part.

[0013] A wire drawing plate is provided inside the feed pipe section or between the feed pipe section and the precipitation hardening pipe section.

[0014] In a preferred embodiment, a hardening observation section is detachably connected between the precipitation hardening tube section and the cutting tube section, and a wire drawing observation mirror is installed on the side wall of the hardening observation tube section.

[0015] In a preferred embodiment, a screening observation section is detachably connected in series in the fluidized screening tube section, and a screening observation sight is installed on the side wall of the screening observation tube section.

[0016] In a preferred embodiment, the cutting section includes an interconnected feeding section and a discharging section, wherein the motor shaft of the cutting motor, the discharging section, and the fluidized screening section are arranged coaxially.

[0017] In a preferred embodiment, a drainage pipe section is further included, which is arranged at an angle and connected between the hardening observation pipe section and the feed section.

[0018] In a preferred embodiment, the system further includes a settling pipe section, which is fixedly connected to the top of the fluidized screen section, and the diameter of the settling pipe section is larger than the diameter of the fluidized screen section. The discharge port is located at the upper part of the settling pipe section.

[0019] In a preferred embodiment, the cutting motor is a speed-regulating motor.

[0020] In a preferred embodiment, the wire drawing plate includes a wire drawing plate body, and a plurality of flow holes are provided through the wire drawing plate body; wherein, on one side of the bottom surface of the wire drawing plate body, each of the flow holes is detachably connected to a wire drawing channel connector.

[0021] In a preferred embodiment, the cutting pipe section is provided with a drain port.

[0022] In a preferred embodiment, the feed pipe section has a tapered structure with the smaller end facing upwards, and the wire drawing plate is detachably and sealingly connected between the bottom end of the feed pipe section and the top end of the precipitation and hardening pipe section.

[0023] The beneficial effects of the present invention using the above technical solution are as follows: In the solution provided by the present invention, after the high-viscosity polymer is extruded into the flow holes of the drawing plate, the solvent-containing material is drawn into filaments after passing through the drawing plate, and then precipitates into solid filaments in a poor solvent. The precipitated filaments are granulated into small particles under the action of gravity and high-speed cutter. Qualified particles leave the sedimentation granulation and screening machine under the action of continuous liquid, while unqualified products settle to the cutter under the action of gravity to continue cutting and granulation until qualified. Compared with traditional commercial granulators, the present invention has a compact structure and integrates four functions: sedimentation, drawing, granulation, and screening. It can produce continuously, has a small footprint, and the throughput is adjustable. In addition, the entire process is closed, which is friendly to personnel and the environment. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the wire drawing plate in this invention.

[0026] In the diagram: 1-feed pipe section, 2-sedimentation screening pipe section, 3-drawing plate, 31-drawing plate body, 32-flow hole, 33-drawing channel connector, 4-cutting pipe section, 5-drainage pipe section, 6-cutting motor, 7-blade, 8-fluidized screening pipe section, 9-sedimentation pipe section, 10-discharge branch pipe, 11-feed inlet, 12-liquid inlet branch pipe, 13-hardening observation sight glass, 14-screening observation sight glass, 15-liquid discharge branch pipe. Detailed Implementation

[0027] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the description of the structure of this invention shown in the accompanying drawings. They are only for the convenience of describing this invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] The terms "first" and "second" in this technical solution are merely designations for corresponding structures that are identical or similar, or that perform similar functions. They do not represent an arrangement of the importance of these structures, nor do they imply any ranking, comparison of size, or other meaning.

[0030] Furthermore, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two structures. Those skilled in the art can understand the specific meaning of the above terms in this invention by considering the overall concept of the invention and the specific context of the solution.

[0031] Example 1

[0032] like Figure 1 As shown, an embodiment of the present invention provides a precipitation granulation and screening machine, including a feed pipe section 1, a precipitation hardening pipe section 2, a wire drawing plate 3, a cutting pipe section 4, a diversion pipe section 5, a cutting motor 6, a cutter 7, and a fluidized screening pipe section 8.

[0033] The feed pipe section 1 is arranged vertically, with a feed port 11 for polymer feeding at its top. The precipitation and hardening pipe section 2 is also arranged vertically, with its top end connected to one side of the bottom of the feed pipe section 1. A poor solvent inlet is opened on the side wall of the precipitation and hardening pipe section 2, and an inlet branch pipe 12 is installed on the poor solvent inlet to facilitate the introduction of poor solvent through the inlet branch pipe 12.

[0034] In addition, a wire drawing plate 3 is provided between the feed pipe section 1 and the precipitation and hardening pipe section 2. In this embodiment, the feed pipe section 1 is specifically configured with a tapered structure with the smaller end facing upwards, for example, a cone shape; such as... Figure 2 As shown, the wire drawing plate 3 is configured as a plate-shaped structure, including a wire drawing plate body 31. Several flow holes 32 are provided through the wire drawing plate body 31. On one side of the bottom surface of the wire drawing plate body 31, the bottom end of each flow hole 32 is detachably connected (e.g., threaded connection) to a wire drawing channel connector 33. In use, the wire drawing diameter is controlled by replacing the wire drawing channel connector 33 with the corresponding hole diameter. The wire drawing plate 3 is specifically arranged between the bottom end of the feed pipe section 1 and the top end of the precipitation hardening pipe section 2. Flanges for connection are provided at the bottom end of the feed pipe section 1 and the top end of the precipitation hardening pipe section 2. Bolt holes are correspondingly provided on the wire drawing plate 3 to facilitate the detachable and fixed connection of the feed pipe section 1, the wire drawing plate 3, and the precipitation hardening pipe section 2 by bolts. Sealing rings are typically provided between the wire drawing plate 3 and the feed pipe section 1, and between the wire drawing plate 3 and the precipitation hardening pipe section 2. In use, the soft polymer is squeezed into the conical cavity of the feed pipe section 1. Under pressure, the polymer passes through the drawing channel joint 33 on the drawing plate 3 and is then drawn into a filament with a set diameter. Then, under the action of the undesirable solvent introduced into the liquid inlet branch pipe 12, the solvent in the filament is precipitated out, and then the originally soft filament can be hardened.

[0035] Of course, in other preferred embodiments, the wire drawing plate 3 can also be installed inside the feed pipe section 1. For example, a step for installing the wire drawing plate 3 can be provided on the inner wall of the bottom surface of the feed pipe section 1, and the wire drawing plate 3 can be fixed on the step with screws.

[0036] The cutting section 4 is located on the lower side of the precipitation and hardening section 2. The cutting section 4 includes an infeed section and an outlet section that are connected to each other. The infeed section and the outlet section are arranged at 90° to each other. Typically, the infeed section is horizontal and the outlet section is vertical with its opening facing upward.

[0037] The feeding section connects to the precipitation-hardening tube section 2. To facilitate the connection between the cutting tube section 4 and the precipitation-hardening tube section 2, and to provide a good forward path for the filament, an additional drainage tube section 5 is provided. The drainage tube section 5 connects between the precipitation-hardening tube section 2 and the feeding section. The cutting tube section 4 is vertically offset from the precipitation-hardening tube section 2, allowing the drainage tube section 5 to be arranged at an angle. The connections between the drainage tube section 5 and the precipitation-hardening tube section 2, and between the drainage tube section 5 and the feeding section, are smoothly transitioned to ensure the hardened filament can smoothly enter the cutting tube section 4. Typically, the lower end of the drainage tube section 5 is welded to the feeding section, while the upper end of the drainage tube section 5 is detachably connected to the lower end of the precipitation-hardening tube 2 via a grooved pipe clamp.

[0038] The fluidized screen section 8 is also arranged vertically, and the bottom end of the fluidized screen section 8 is connected to the upward-facing opening end of the discharge section, that is, the two are arranged coaxially.

[0039] In this embodiment, a cutting motor 6 is fixedly installed on the outer side wall of the cutting tube section 4, and a cutter 7 is provided inside the cutting tube section 4. The motor shaft of the cutting motor 6 passes through the side wall of the cutting tube section 4 and is connected to the cutter 7. In this embodiment, the cutting motor 6 is configured as a speed-regulating motor, and the cutting effect of the cutter 7 on the filament can be adjusted by controlling its speed. During operation, the filament is cut into particles by the cutter 7, and then the particles are tumbled upwards under the action of the flow of the poor solvent and enter the fluidized screen section 8. The top of the fluidized screen section 8 is used for particle discharge with the liquid.

[0040] It is understandable that the discharge of particles is based on fluidization, and the upward force of the particles in the fluidized screen section 8 comes from the poor solvent. Therefore, when the particle size is large, the force provided by the poor solvent will not be enough to make the particles reach the discharge position, and the larger particles will sink in the fluidized screen section 8. Therefore, in this embodiment, the motor shaft of the cutting motor 6, the discharge section, and the fluidized screen section 8 are arranged coaxially. This arrangement allows larger particles to fall onto the cutter 7 again, and be cut a second or even multiple times, eventually reaching a suitable size and being discharged with the liquid from the top of the fluidized screen section 8.

[0041] A settling section 9 is installed at the top of the fluidized screen section 8. The settling section 9 is also arranged vertically, and its diameter is larger than that of the fluidized screen section 8. The bottom of the settling section 9 is tapered to facilitate connection with the fluidized screen section 8, such as by welding. The discharge port for particle discharge is located at the top of the settling section 9, and the discharge branch pipe 10 is connected to the discharge port.

[0042] The working process of the precipitation granulation and screening machine provided in this embodiment of the invention is as follows:

[0043] First, the soft polymer is extruded into the conical cavity of the feed pipe section 1. Under pressure, the polymer passes through the drawing channel joint 33 on the drawing plate 3 and is then drawn into a filament with a set diameter. During the drawing process, a poor solvent is introduced through the liquid inlet branch pipe 12, causing the solvent in the soft filament to precipitate out and harden. The hardened filament is then guided into the cutting pipe section 4 by the inclined drainage pipe section 5. Simultaneously with the drawing process, the cutting motor 6 starts and drives the cutter 7. As the hardened filaments enter along with the undesirable solvent, the cutter 7 cuts them into small particles. Under the influence of the fluid dynamics and pressure of the undesirable solvent, the particles rise with it and enter the fluidized screening section 8. After fluidization, particles of suitable size enter the settling section 9 and are discharged from the outlet branch pipe 10 with the liquid. Larger particles settle and fall back onto the cutter 7 to be cut. This settling and cutting process is repeated until the size decreases to the point where they can be discharged with the liquid.

[0044] Example 2

[0045] To facilitate the observation of the hardening degree of the filament, based on Example 1, this example includes a detachable hardening observation section connected between the precipitation hardening tube section 2 and the cutting tube section 4. Specifically, the hardening observation section is installed between the precipitation hardening tube section 2 and the drainage tube section 5, and is configured vertically for easy observation. A wire-drawing observation sight glass 13 is installed on the side wall of the hardening observation section.

[0046] In this embodiment, the hardened observation pipe section and the sedimentation hardened pipe section 2, as well as the hardened observation pipe section and the drainage pipe section 5, are all connected by trench pipe clamps.

[0047] Example 3

[0048] The fluidized screen section 8 is divided into two sections. The lower section is welded to the discharge section of the cutting section 4, and the upper section is welded to the settling section 9. In addition, a screening observation section is detachably connected between the two sections of the fluidized screen section 8, and a screening observation sight glass 14 is installed on the side wall of the screening observation section.

[0049] In this embodiment, both ends of the screening observation tube section are connected to the two sections of the fluidized screening tube section 8 via grooved pipe clamps.

[0050] With this setup, the fluidization of particles in the fluidized screen section 8 can be clearly and intuitively observed through the screening observation mirror 14. Then, it can be determined whether the overall size of the particles is too large or too small, and the speed of the cutting motor 6 can be adjusted accordingly.

[0051] Furthermore, the fluidization condition is also related to the flow rate of the undesirable solvent. To ensure the filament hardening effect, this embodiment also includes a drain outlet on the cutting section 4, connected to a drain branch pipe 15. The drain branch pipe 15 typically has a filter screen (not shown in the figure) for intercepting particles and a valve (not shown in the figure) for controlling the flow rate of the undesirable solvent. In use, by controlling the flow rate of this valve, the fluidization condition in the fluidized sieving section 8 can be controlled while maintaining a constant particle size. This prevents larger particles from being carried out by the flowing undesirable solvent without settling.

[0052] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A precipitation granulation and screening machine, characterized in that, include: The feed pipe section is arranged vertically and has a feed inlet at its top. A precipitation hardening tube section is arranged vertically and connected to the bottom end of the feed tube section. The side wall of the precipitation hardening tube section is provided with a poor solvent inlet. A cutting pipe section is provided, the feed end of which is connected to the precipitation and hardening pipe section. A cutting motor is fixedly installed on the outside of the side wall of the cutting pipe section, and a cutter is provided inside the cutting pipe section. The motor shaft of the cutting motor passes through the side wall of the cutting pipe section and is connected to the cutter. A fluidized screen section is arranged vertically, with its bottom end connected to the discharge end of the cutting section, and a discharge port provided at its top or upper part. A wire drawing plate is provided inside the feed pipe section or between the feed pipe section and the precipitation hardening pipe section; The cutting pipe section is vertically offset from the precipitation and hardening pipe section, and an inclined drainage pipe section connects the precipitation and hardening pipe section and the cutting pipe section.

2. The precipitation granulation and screening machine according to claim 1, characterized in that: A hardening observation tube is detachably connected between the precipitation hardening tube section and the cutting tube section, and a wire drawing observation mirror is installed on the side wall of the hardening observation tube section.

3. The precipitation granulation and screening machine according to claim 1, characterized in that: A screening observation tube section is detachably connected in series within the fluidized screening tube section, and a screening observation sight is installed on the side wall of the screening observation tube section.

4. The precipitation granulation and screening machine according to claim 2, characterized in that: The cutting pipe section includes an interconnected feeding section and a discharging section, wherein the motor shaft of the cutting motor, the discharging section, and the fluidized screening pipe section are arranged coaxially.

5. The precipitation granulation and screening machine according to claim 4, characterized in that: It also includes a drainage pipe section, which is arranged at an angle and connected between the hardened observation pipe section and the feed section.

6. The precipitation granulation and screening machine according to claim 1, characterized in that: It also includes a settling pipe section, which is fixedly connected to the top of the fluidized screen pipe section, and the diameter of the settling pipe section is larger than the diameter of the fluidized screen pipe section. The discharge port is located at the upper part of the settling pipe section.

7. The precipitation granulation and screening machine according to claim 1, characterized in that: The cutting motor is a speed-regulating motor.

8. The precipitation granulation and screening machine according to claim 1, characterized in that: The wire drawing plate includes a wire drawing plate body, on which a plurality of flow holes are provided through; wherein, on one side of the bottom surface of the wire drawing plate body, each of the flow holes is detachably connected to a wire drawing channel connector.

9. The precipitation granulation and screening machine according to claim 1, characterized in that: The cut pipe section is provided with a drain port.

10. The precipitation granulation and screening machine according to claim 1, characterized in that: The feed pipe section has a tapered structure with the small end facing upwards, and the wire drawing plate is detachably and sealingly connected between the bottom end of the feed pipe section and the top end of the precipitation and hardening pipe section.

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