Solid aggregation crystallizer

Abstract

The utility model relates to the technical field of chemical production, in particular to a solid polymerization crystallizer which comprises a shell, a feed port is arranged at one end of the top of the shell, an air outlet is arranged at the other end of the top of the shell, a discharge port and an air inlet are arranged at the bottom of the shell, a distributor is arranged at the feed port, the distributor is fixed at the feed port through a support, and the distributor is of a conical structure. The problems that materials are agglomerated in the crystallizer, material crystallization is affected, and product quality is affected can be solved.

Description

Technical Field

[0001] This utility model relates to the field of chemical production technology, specifically a solid-polymer crystallizer. Background Technology

[0002] Solid-state crystallizers are key pieces of equipment used in chemical production, used to crystallize monomer molecules or their oligomers in a solid state. One end of the crystallizer has a feed inlet at the top, and the other end has a discharge outlet at the bottom. Inside the crystallizer is a screen, with an air inlet below the screen and an air outlet above it. Material enters the crystallizer through the feed inlet, falls onto the screen, reacts under the influence of airflow, and moves towards the discharge outlet, where it is finally discharged. However, existing solid-state crystallizers still have the following technical problems:

[0003] 1. When materials enter the crystallizer through the feed straight pipe, they tend to clump together and fall unevenly, causing the materials to form lumps that block the channels. Furthermore, these clumps can impede the normal flow of other materials, creating localized stagnation areas. This results in materials remaining stuck and blocked within the crystallizer, preventing further material movement and severely impacting production.

[0004] 2. Existing technology uses filter screens at the air outlet to prevent air from entering. However, in actual production, a large amount of debris is laid on the filter screens, affecting the air circulation inside the crystallizer. This forces the crystallizer to be shut down for cleaning, reducing production efficiency and increasing production costs. Utility Model Content

[0005] This invention provides a solid-state crystallizer that can solve the problem of materials agglomerating and clumping within the crystallizer, affecting material crystallization and product quality.

[0006] This application provides the following technical solution:

[0007] A solid-state crystallizer includes a shell, with a feed inlet at one end of the top of the shell and an air outlet at the other end, and a discharge outlet and an air inlet at the bottom of the shell. A distributor is provided at the feed inlet, and the distributor is fixed at the feed inlet by a bracket. The distributor has a conical structure.

[0008] Beneficial Effects: A conical distributor at the feed inlet allows material to directly impact the conical surface of the distributor upon entry. Due to the characteristics of the conical structure, the material disperses and slides along the surface, ensuring even distribution within the solid-state crystallizer. This allows for more complete reaction under airflow, effectively eliminating stagnant areas, ensuring consistent residence time within the crystallizer, improving product quality, and guaranteeing stable product performance. The distributor is fixed to the feed inlet by a bracket. As the material slides along the conical surface, it is further dispersed by the bracket, preventing clumping. The structure is simple, easy to install and maintain. The conical structure itself has good stability, capable of withstanding the impact and gravity of the material, and is not prone to deformation or damage during long-term use, ensuring the normal operation of the solid-state crystallizer.

[0009] Furthermore, the cone-shaped structure of the distributor has its apex at the top and its bottom at the bottom, and the diameter of the bottom surface of the distributor is greater than or equal to the diameter of the feed inlet.

[0010] Beneficial effects: The bottom diameter of the distributor is greater than or equal to the diameter of the feed inlet, which ensures that the material entering from the feed inlet is in full contact with the distributor and that the material is fully dispersed.

[0011] Furthermore, the bottom surface of the distributor is provided with a downward-opening conical groove, and the outer peripheral wall of the distributor is provided with multiple through holes communicating with the conical groove.

[0012] Beneficial effects: After the material enters from the feed inlet, it impacts the conical surface of the distributor, causing the material to be dispersed. Part of the dispersed material falls along the conical surface from the bottom edge of the distributor into the housing, while another part falls through the through hole into the inside of the housing, ensuring that the material is more evenly dispersed in the housing and effectively preventing the material from concentrating in a certain area.

[0013] Furthermore, a screen is provided inside the shell, which divides the inside of the shell into two chambers, namely an upper chamber and a lower chamber. The upper chamber is connected to the feed inlet, the discharge outlet, and the air outlet, and the lower chamber is connected to the air inlet.

[0014] Beneficial effects: The screen provides a clear and rational flow path for the gas-solid two-phase mixture. Material enters the upper chamber through the feed inlet and moves to the discharge outlet under the influence of gravity and airflow; air enters the lower chamber through the air inlet, passes through the screen into the upper chamber, and then exits through the air outlet. This counter-current flow of the gas and solid phases increases the contact time and heat transfer efficiency between them, which is beneficial for improving the solid-state crystallization effect and product quality.

[0015] Furthermore, the screen is provided with multiple first baffles, with adjacent first baffles arranged in an alternating pattern, and the multiple alternating first baffles forming an S-shaped channel on the screen.

[0016] Beneficial effects: The staggered arrangement of the first baffles will obstruct and divert the material flow, causing the material to be continuously dispersed during the flow of the S-shaped channel, which helps to prevent the material from agglomerating and accumulating.

[0017] Furthermore, the inner side of the housing is provided with a plurality of second baffles, which are located above the screen and are tilted to one side, with the upper end close to the feed inlet and the lower end close to the discharge outlet.

[0018] Beneficial effects: The second baffle effectively blocks materials splashed due to airflow impact and particle collision, causing the materials to fall back onto the screen along the second baffle. This effectively prevents materials from entering the air outlet, reducing material loss and lowering subsequent gas treatment costs. Compared with existing technologies that install filters at the air outlet, this eliminates the need for filters at the air outlet, avoiding obstruction of gas flow and ensuring normal production.

[0019] Furthermore, the multiple baffles are arranged at different heights along the extension direction of the screen.

[0020] Beneficial effects: The staggered arrangement of baffles can more effectively intercept splashed materials, reduce material loss, and lower production costs.

[0021] Furthermore, the inner side of the housing is provided with a material layer thickness adjustment plate, which is located between the screen and the discharge port.

[0022] Beneficial effects: The material layer thickness adjustment plate allows for flexible adjustment of the material accumulation thickness on the screen, facilitating the adjustment of gas-solid heat transfer efficiency according to actual production needs.

[0023] Furthermore, a guide ramp is provided at the discharge port of the shell.

[0024] Beneficial effect: The guide plate facilitates the material to slide through the screen and into the discharge port along the guide plate.

[0025] Furthermore, the air outlet of the shell is connected to the air inlet of the cyclone separator, the air outlet of the cyclone separator is connected to the air inlet of the fan, an air inlet pipe is provided between the air outlet of the cyclone separator and the air inlet of the fan, an air inlet regulating valve and an air filter are provided on the air inlet pipe, the air outlet of the fan is connected to the air inlet of the heat exchanger, an air outlet pipe is provided between the air outlet of the fan and the air inlet of the heat exchanger, an air outlet regulating valve is provided on the air outlet pipe, and the air outlet of the heat exchanger is connected to the air inlet of the shell.

[0026] Beneficial effects: The gas discharged from the outlet of the casing passes through the cyclone separator, fan, and heat exchanger before re-entering the casing, effectively recovering heat, improving energy efficiency, reducing energy consumption, and protecting the environment. The inlet regulating valve on the inlet pipe and the outlet regulating valve on the outlet pipe can precisely regulate the airflow entering and exiting the fan, respectively. By adjusting the valve opening, the airflow and pressure can be flexibly controlled according to actual production needs, ensuring the system operates under optimal conditions, improving energy efficiency, and reducing energy consumption. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a solid-state crystallizer according to Embodiment 1 of this utility model.

[0028] Figure 2 This is a top view of the inner screen of the shell of the solidification crystallizer of this utility model, according to Embodiment 1.

[0029] Figure 3 This is an isometric view of the distributor at the feed inlet of Embodiment 1 of the solid-polymer crystallizer of this utility model.

[0030] Figure 4 This is a schematic diagram of the hot air circulation system of Embodiment 1 of the solidification crystallizer of this utility model.

[0031] Figure 5 This is an isometric view of the distributor at the feed inlet of Embodiment 2 of the solidification crystallizer of this utility model.

[0032] Figure 6 This is a schematic diagram of the structure of Embodiment 3 of the solidification crystallizer of this utility model.

[0033] Figure 7 These are schematic diagrams of embodiments four and five of the solid-polymer crystallizer of this utility model. Detailed Implementation

[0034] The following detailed description illustrates the specific implementation method:

[0035] The markings in the accompanying drawings include: shell 1, feed inlet 2, discharge outlet 3, air inlet 4, air outlet 5, distributor 6, bracket 7, screen 8, guide inclined plate 9, first baffle 10, second baffle 11, conical groove 12, through hole 13, material layer thickness adjustment plate 14, cyclone separator 15, impurity removal regulating valve 16, impurity removal tank 17, fan 18, air inlet regulating valve 19, air filter 20, heat exchanger 21, air outlet regulating valve 22, and air inlet regulating valve 23.

[0036] Example 1

[0037] like Figures 1 to 4As shown, a solid-state crystallizer includes a shell 1 with a chamber inside. The top of the shell 1 has a feed inlet 2 at one end and an air outlet 5 at the other. The bottom of the shell 1 has an outlet 3 and two air inlets 4, with the outlet 3 located below the air outlet 5. A distributor 6 is located directly below the feed inlet 2, and the distributor 6 is fixedly connected to the feed inlet 2 by three supports 7 evenly distributed at the feed inlet 2. A vertically upward-extending feed pipe is connected to the feed inlet 2 of the shell 1. The distributor 6 has a conical structure, with the apex of the conical structure at the top and the bottom at the bottom. The central axis of the distributor 6 is located on the central axis of the feed pipe, and the diameter of the bottom surface of the distributor 6 is greater than or equal to the diameter of the feed inlet 2.

[0038] A horizontally extending screen 8 is provided inside the shell 1, dividing the inner side of the shell 1 into two chambers: an upper chamber and a lower chamber. The upper chamber is connected to the feed inlet 2, the discharge outlet 3, and the air outlet 5, while the lower chamber is connected to two air inlets 4, located at the front and rear ends near the screen 8, respectively. Multiple first baffles 10 are provided on the screen 8, with adjacent first baffles 10 arranged in an alternating pattern, forming an "S"-shaped channel on the screen 8. A guide ramp 9 is provided at the discharge outlet 3 of the shell 1, facilitating the material to slide along the guide ramp 9 into the discharge outlet 3 after passing through the screen 8.

[0039] The feed inlet 2 of the casing 1 is connected to the equipment of the previous process via a feed pipe, and the discharge outlet 3 is connected to the equipment of the next process via a discharge pipe. The air outlet 5 of the casing 1 is connected to the air inlet of the cyclone separator 15 via a ventilation pipe. The air outlet of the cyclone separator 15 is connected to the air inlet of the fan 18 via a ventilation pipe. The ventilation pipe between the air outlet of the cyclone separator 15 and the air inlet of the fan 18 is connected to the air inlet pipe. The air inlet pipe is equipped with an air inlet regulating valve 19 and an air filter 20. The air outlet of the fan 18 is connected to the air inlet of the heat exchanger 21 via a ventilation pipe. The ventilation pipe between the air outlet of the fan 18 and the air inlet of the heat exchanger 21 is connected to the air outlet pipe. The air outlet pipe is equipped with an air outlet regulating valve 22. The air outlet of the heat exchanger 21 is connected to two branch pipes via a ventilation pipe. The two branch pipes are respectively connected to the two air inlets 4 of the casing 1. Each of the two branch pipes is equipped with an air inlet regulating valve 23. The impurity removal port of the cyclone separator 15 is connected to the impurity removal tank 17 via an impurity removal pipe, and an impurity removal regulating valve 16 is provided on the impurity removal pipe. The blower 18 can be a variable frequency blower 18.

[0040] The usage method is as follows:

[0041] During production, air, driven by fan 18, is filtered through air filter 20 and enters the ventilation duct. It is heated by heat exchanger 21 and enters the inner chamber of crystallizer shell 1 through bottom air inlet 4. After heat exchange with the material through screen 8, it is discharged from top air outlet 5. The air then passes through cyclone separator 15 for impurity removal. The impurities separated by cyclone separator 15 enter impurity removal tank 17 through impurity removal pipe. The air passing through cyclone separator 15 is circulated back to the inner chamber of shell 1 by fan 18, or discharged into the atmosphere through air outlet pipe. Material enters shell 1 through feed inlet 2 and falls onto separator under gravity. Clumps of material are broken up by distributor 6 and further dispersed by support 7. The material then falls along the outer wall of distributor 6 onto screen 8. Under the action of pulsed air, the material moves forward along an "S"-shaped channel to discharge outlet 3, from which it enters the next process.

[0042] Example 2

[0043] like Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that the bottom surface of the distributor 6 is provided with a downward-opening conical groove 12, and the outer peripheral wall of the distributor 6 is provided with a plurality of through holes 13 communicating with the conical groove 12.

[0044] Example 3

[0045] like Figure 6 As shown, the difference between this embodiment and Embodiment 1 is that the inner side of the housing 1 is provided with multiple second baffles 11. The second baffles 11 are located above the screen 8 and are tilted to one side, with the upper end close to the feed inlet and the lower end close to the discharge outlet, to prevent material splashing and effectively prevent material from entering the air outlet 5. During the movement of material on the screen 8, it will splash upwards due to the wind force. The material splashes to the second baffle 11 and moves downwards along the second baffle 11 to fall onto the screen 8, effectively preventing the material from being discharged from the air outlet 5 with the air.

[0046] Example 4

[0047] like Figure 7 As shown, the difference between this embodiment and embodiment three is that multiple second baffles 11 inclined to one side are provided above the screen 8 on the inner side of the housing 1, and the multiple second baffles 11 are arranged at different heights along the extension direction of the screen 8.

[0048] Example 5

[0049] like Figure 7As shown, the difference between this embodiment and Embodiment 1 is that a material layer thickness adjustment plate 14 is provided inside the housing 1. The material layer thickness adjustment plate 14 is located between the screen 8 and the guide inclined plate 9 of the discharge port 3. One end of the material layer thickness adjustment plate 14 is sleeved on the rotating shaft, which is rotatably installed inside the housing 1. One end of the rotating shaft extends to the outside of the housing 1 and is connected to the operating handle. The material layer thickness adjustment plate 14 can rotate using the rotating shaft as the fulcrum. Multiple first baffles 10 can be provided on the screen 8, or no first baffles 10 can be provided.

[0050] The above are merely embodiments of this utility model, and the utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A solid polymerization crystallizer comprising a shell, the shell having a feed inlet at one end of the top portion, an air outlet at the other end, a discharge outlet and an air inlet at the bottom portion, characterized in that: A distributor is provided at the feed inlet, and the distributor is fixed at the feed inlet by a bracket. The distributor has a conical structure.

2. A solidification crystallizer according to claim 1, characterized in that: The cone-shaped structure of the distributor has its apex at the top and its base at the bottom, and the diameter of the bottom of the distributor is greater than or equal to the diameter of the feed inlet.

3. A solidification crystallizer according to claim 1, characterized in that: The bottom surface of the distributor is provided with a downward-opening conical groove, and the outer peripheral wall of the distributor is provided with multiple through holes communicating with the conical groove.

4. A solidification crystallizer according to claim 1, characterized in that: The inner side of the shell is provided with a screen, which divides the inner side of the shell into two chambers, namely an upper chamber and a lower chamber. The upper chamber is connected to the feed inlet, the discharge outlet and the air outlet, and the lower chamber is connected to the air inlet.

5. A solid-state crystallizer according to claim 4, characterized in that: The screen is provided with multiple first baffles, with adjacent first baffles arranged alternately, and the multiple alternately arranged first baffles form an S-shaped channel on the screen.

6. A solidification crystallizer according to claim 4, characterized in that: The inner side of the housing is provided with a plurality of second baffles. The second baffles are located above the screen and are tilted to one side, with the upper end close to the feed inlet and the lower end close to the discharge outlet.

7. A solidification crystallizer according to claim 6, characterized in that: The multiple baffles are arranged at different heights along the extension direction of the screen.

8. A solidification crystallizer according to claim 4, wherein: The inner side of the housing is provided with a material layer thickness adjustment plate, which is located between the screen and the discharge port.

9. A solidification crystallizer according to claim 4, wherein: The discharge port of the shell is provided with a guide ramp.

10. A solidification crystallizer according to claim 1, characterized by: The air outlet of the shell is connected to the air inlet of the cyclone separator, the air outlet of the cyclone separator is connected to the air inlet of the fan, an air inlet pipe is provided between the air outlet of the cyclone separator and the air inlet of the fan, an air inlet regulating valve and an air filter are provided on the air inlet pipe, the air outlet of the fan is connected to the air inlet of the heat exchanger, an air outlet pipe is provided between the air outlet of the fan and the air inlet of the heat exchanger, an air outlet regulating valve is provided on the air outlet pipe, and the air outlet of the heat exchanger is connected to the air inlet of the shell.

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