High-boiling-point volatile component devolatilization equipment

Abstract

The utility model provides high-boiling-point volatile component devolatilization equipment which comprises a devolatilization box, one side of the devolatilization box is provided with an opening, the opening is connected with a door body, and a sealing piece is arranged at the joint of the opening and the door body; polymer trays are arranged in the devolatilization box at intervals from top to bottom, to-be-devolatilized materials are borne on the top surfaces of the polymer trays, heating structures are arranged in the polymer trays and / or on the bottom surfaces of the polymer trays, and the heating structures of the adjacent polymer trays are communicated through connecting pipes; a heating medium inlet is formed in the bottom of the devolatilization box, a heating medium outlet is formed in the top of the devolatilization box, the bottommost heating structure is communicated with the heating medium inlet, and the topmost heating structure is communicated with the heating medium outlet; one side of the devolatilization box is connected with a vacuum pipe, a heat supply piece is arranged outside the devolatilization box, and the tail end is connected with a catcher. The high-temperature devolatilization device has the advantages that the high-temperature requirement of high-boiling-point materials in devolatilization treatment is met, the devolatilization effect is good, devolatilized high-boiling-point volatile components can be captured and recycled, and pollution caused by emission is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of polymer production equipment, in particular to a high boiling point volatile devolatilization device. Background Art

[0002] In the production of some polymers, high-boiling-point substances are used as raw materials to carry out polymerization reactions to generate the final product. However, during the polymerization process, it is difficult for the raw materials to achieve a 100% conversion rate, and thus, unconverted high-boiling-point raw materials are often mixed in the final product.

[0003] In order to improve the purity of the product, it is necessary to devolatilize the high-boiling-point raw materials. At present, most devolatilization equipment is for ordinary materials, and most of them adopt a stirring structure, which continuously stirs the materials through a designed stirring shaft to improve the devolatilization effect. However, for high-boiling-point materials, this stirring structure is difficult to provide the high-temperature conditions required, so the devolatilization effect is poor.

[0004] Therefore, how to improve the design of devolatilization equipment to meet the devolatilization treatment needs of high-boiling point materials has become a problem that needs to be solved. Utility Model Content

[0005] The utility model provides a high boiling point volatiles devolatilization device, which can meet the high temperature requirement of high boiling point materials in devolatilization treatment, has good devolatilization effect, can capture the high boiling point volatiles devolatilized, recycle them and avoid pollution caused by discharge.

[0006] The technical solution of the utility model includes: a high-boiling-point volatile devolatilization device, including: a devolatilization box, one side of the devolatilization box is open and the opening is connected to a door body, and a sealing member is provided at the connection between the opening and the door body; polymer trays are arranged from top to bottom in the devolatilization box, the top surface of the polymer tray carries the material to be devolatilized, the interior and / or the bottom surface of the polymer tray is provided with a heating structure, and the heating structures of adjacent polymer trays are connected through a connecting pipe; a heat medium inlet is provided at the bottom of the devolatilization box, a heat medium outlet is provided at the top of the devolatilization box, the heating structure of the polymer tray located at the bottom is connected to the heat medium inlet, and the heating structure of the polymer tray located at the top is connected to the heat medium outlet; a vacuum tube is connected to one side of the devolatilization box, a heating component is provided on the outside of the vacuum tube, and a catcher is connected to the end of the vacuum tube.

[0007] Preferably, the heating structure is a serpentine tube disposed on the bottom surface of the polymer tray, and the serpentine tubes of adjacent polymer trays are staggered.

[0008] Preferably, the heating structure is a heating jacket disposed inside the polymer tray.

[0009] Preferably, a first groove is provided at the connection between the door body and the opening, a sealing ring is installed in the first groove, and the outer surface of the sealing ring protrudes from the first groove; a second groove is provided at the connection between the devolatilization box and the door body, and the protruding part of the sealing ring is placed in the second groove.

[0010] Preferably, the vacuum tube is connected to the side of the devolatilization box opposite to the door body, and the heating element is a jacket arranged outside the vacuum tube, and the jacket is filled with a heat medium.

[0011] Preferably, the devolatilization box is equipped with a temperature measuring device and a first vacuum gauge, and the trap is equipped with a second vacuum gauge.

[0012] The beneficial effects of the utility model are as follows: by arranging polymer trays from top to bottom in a devolatilization box, the top surface of each polymer tray is used to carry the material to be devolatilized, and the material to be devolatilized is distributed, and a heating structure is arranged inside and / or on the bottom surface of the polymer tray, and the material carried by the heating structure is heated and devolatilized, so that the distributed materials are fully heated and heated to meet the high boiling point devolatilization requirements; furthermore, a heat medium inlet is arranged at the bottom of the devolatilization box, a heat medium outlet is arranged at the top of the devolatilization box, and the heating structures of adjacent polymer trays are connected by a connecting pipe, so that heat medium heating can be provided to each polymer tray in the devolatilization box in a centralized manner, and the heating structure can be simplified when the high temperature requirement of the devolatilization of the high boiling point material is met; furthermore, a vacuum tube and a capturer are designed to capture and collect the high boiling point volatiles from the devolatilization for recycling and reuse, thereby avoiding pollution caused by direct discharge, and in order to improve the capture efficiency, a heating component is designed in the vacuum tube to avoid the high boiling point volatiles from the devolatilization from being solidified when cold during collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0014] Figure 1 It is a schematic structural diagram of an embodiment.

[0015] Figure 2 Schematic diagram of the back side of the polymer tray in the embodiment.

[0016] Figure 3 is a schematic diagram of a cross section of a polymer tray in another embodiment.

[0017] in:

[0018] 1. Devolatilization box, 11. Heat medium inlet, 12. Heat medium outlet, 2. Door body, 3. Polymer tray, 4. Heating structure, 41. Serpentine tube, 42. Heating jacket, 5. Vacuum tube, 51. Jacket, 6. Catcher. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] In this article, the terms "upper, lower, left, right, inside, outside" and the like are established based on the positional relationships shown in the drawings. Depending on the different drawings, the corresponding positional relationships may also change accordingly. Therefore, they cannot be understood as absolute limitations on the scope of protection; moreover, relational terms such as "first" and "second" and the like are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components. In addition, in the embodiments of the present utility model, "above", "below", etc., include the number itself.

[0021] like Figures 1 to 3 As shown, the high-boiling-point volatiles devolatilization equipment of this embodiment can meet the high-temperature requirement in the devolatilization treatment of the difficult high-boiling-point volatiles, has a good devolatilization effect, and can capture the high-boiling-point volatiles devolatilized for recycling and avoid pollution caused by emissions.

[0022] In this embodiment, the high boiling point volatiles devolatilization equipment includes a devolatilization box 1, referring to Figure 1 The devolatilization box 1 can adopt a vertical square box structure or a vertical tank structure. The specific shape is not limited here and can be adjusted according to needs. An opening is designed on one side of the devolatilization box 1, and a door body 2 is connected to the opening. When it is necessary to take materials into and out of the devolatilization box 1, the door body 2 can be opened. When the materials are placed in the devolatilization box 1 and need to be devolatilized at high temperature, the door body 2 can be closed. Specifically, the door body 2 can be connected to the opening of the devolatilization box 1 through a hinge or other structural type.

[0023] Considering that creating a high temperature and vacuum environment is more conducive to the release of high-boiling volatiles during the devolatilization process, a seal is provided at the connection between the opening and the door body 2, so that after the door body 2 is closed, the seal can be used to maintain the vacuum degree in the devolatilization box 1, thereby improving the devolatilization effect and efficiency. In a specific implementation embodiment, a first groove (not shown in the figure) is provided at the connection between the door body 2 and the opening. Specifically, the first groove can be arranged around the door body 2, or can be arranged at intervals along the circumference of the door body 2. A sealing ring (not shown in the figure) is installed in the first groove, and the outer surface of the sealing ring protrudes from the first groove. Accordingly, a second groove (not shown in the figure) is provided at the connection between the devolatilization box 1 and the door body 2. In this way, when the door body 2 is closed, the protruding part of the sealing ring is placed in the second groove to maintain the sealing reliability of the connection between the devolatilization box 1 and the door body 2, and maintain the vacuum degree in the devolatilization box 1.

[0024] Polymer trays 3 are arranged in the devolatilization box 1 from top to bottom. Figure 1 Seven polymer trays 3 are arranged in the devolatilization box 1 at intervals from top to bottom, and adjacent polymer trays 3 are arranged at equal intervals. Of course, in other variations of the embodiments, the number of polymer trays 3 and their intervals can be adjusted as needed. For example, the intervals of the polymer trays 3 can be set to be different to accommodate different thicknesses of the devolatilized materials placed on different polymer trays 3.

[0025] The top surface of the polymer tray 3 carries the material to be devolatilized, and the interior and / or bottom surface of the polymer tray 3 is provided with a heating structure 4, and the heating structures 4 of adjacent polymer trays 3 are connected through a connecting pipe; and a heat medium inlet 11 is provided at the bottom of the devolatilization box 1, and a heat medium outlet 12 is provided at the top of the devolatilization box 1, and the heating structure 4 of the polymer tray 3 located at the bottom is connected to the heat medium inlet 11, and the heating structure 4 of the polymer tray 3 located at the top is connected to the heat medium outlet 12. When in use, the material to be devolatilized is spread on the top surface of the polymer tray 3. At this time, the polymer to be devolatilized spread on the polymer tray 3 is heat-exchanged with the heat medium that enters the heating structure 4 through the heat medium inlet 11 and the connecting pipe, and the high-boiling-point volatiles in the polymer are removed under the heating action of the heat medium.

[0026] A vacuum tube 5 is connected to one side of the devolatilization box 1, and a heating component is provided on the outside of the vacuum tube 5, and a catcher 6 is connected to the end of the vacuum tube 5. During the devolatilization process, the polymer laid on the polymer tray 3 is heated and devolatilized by the heating structure 4, and then enters the catcher 6 through the vacuum tube 5 connected thereto for collection, and is uniformly recycled for subsequent reuse, and the pollution caused by direct discharge can be avoided. During the capture and collection, in order to avoid the high-boiling-point volatiles of the devolatilization from solidifying again when cold, a heating component is provided on the outside of the vacuum tube 5 to ensure the normal capture and collection of the high-boiling-point volatiles. Specifically, the vacuum tube 5 is provided on the side of the devolatilization box 1 opposite to the door body, and the heating component adopts a jacket 51 provided on the outside of the vacuum tube 5, and a heat medium is filled in the jacket 51, and the heat medium can adopt the same or different heat medium as the devolatilization box 1, for example, hot water or high-temperature steam can be used.

[0027] In this embodiment, Figure 2 As shown, the heating structure 4 can be a serpentine tube 41 disposed on the bottom surface of the polymer tray 3, and the serpentine tubes 41 of adjacent polymer trays 3 are arranged in a staggered manner. In this way, on the one hand, the back and forth flow of the heat medium in the serpentine tube 41 can increase the disturbance and improve the heat exchange efficiency, and on the other hand, the staggered serpentine tubes 41 can be used to increase the disturbance and improve the heat exchange efficiency. On the other hand, the upper polymer tray 3 can also provide a certain amount of heat radiation for the lower polymer tray 3, thereby improving the heating effect of the polymer to be devolatilized, and further improving the efficiency and effect of the removal of its high-boiling point volatiles.

[0028] like Figure 3 As shown, the heating structure 4 may also use a heating jacket 42 disposed inside the polymer tray 3 to avoid the problem of difficulty in cleaning the scaling of the heat medium that is prone to scaling, thereby reducing the maintenance cost of the devolatilization equipment.

[0029] In this embodiment, a temperature measuring device and a first vacuum gauge are installed in the devolatilization box 1, and a second vacuum gauge is installed in the capturer 6. Specifically, the temperature measuring device can be a temperature sensor, a thermometer, etc., and the temperature in the devolatilization box 1 is obtained by using the temperature measuring device, and the amount of heat medium entering from the heat medium inlet 11 and the temperature of the heat medium are controlled according to the temperature to avoid the temperature being too low, which affects the devolatilization effect; or the temperature is too high, causing the polymer to melt into blocks in the polymer tray 3. When the devolatilization box 1 is evacuated, the first vacuum gauge is used for monitoring to prevent high-boiling-point volatiles from solidifying in the pipeline and blocking the pipeline to cause vacuum abnormalities. Also, during devolatilization and capture, the second vacuum gauge is used to monitor whether the capturer 6 is operating normally. If an abnormality occurs, there are too many high-boiling-point volatiles in the capturer 6, and the capture capacity is reduced, which ultimately causes the vacuum degree to decrease and the devolatilization effect to decrease.

[0030] During use, when the polymerization is completed and it is necessary to devolatilize the high-boiling volatiles of the polymer, first check whether the equipment is normal, for example, whether the vacuum unit, the trap 6, and the heat medium system are normal. Specifically, the vacuum unit for evacuation can be connected to the devolatilization box 1, or it can be connected to the vacuum tube 5, and it can be set as needed, and no specific restrictions are made here. After confirming that the equipment is normal, open the heat medium inlet 11 and the heat medium outlet 12 valves, and introduce the heat medium into the devolatilization box 1. After the heat medium temperature is adjusted to the devolatilization temperature and kept constant, open the jacket 51 of the vacuum tube 5 for heating, provide heat for the vacuum tube 5, and connect the trap 6 to the end of the vacuum tube 5 to complete the preparation work.

[0031] After that, start feeding, and spread the polymer to be devolatilized in each polymer tray 3, and according to different polymers, different thicknesses can be laid in the polymer tray 3. After filling, close the door 2, turn on the vacuum unit, and evacuate the devolatilization box 1. Pay attention to the first vacuum count value to prevent high-boiling point volatiles from solidifying in the pipeline and blocking the pipeline, causing vacuum abnormality. After the vacuum degree is normal, start counting the devolatilization time.

[0032] During the devolatilization process, use a temperature measuring device to pay attention to the temperature fluctuation of the heat medium to avoid the temperature being too low, which affects the devolatilization effect, or the temperature being too high, which causes the polymer to melt into blocks in the polymer tray 3. At the same time, use the second vacuum gauge to pay attention to whether the operation of the capturer 6 is normal. If an abnormality occurs, there are too many high-boiling-point volatiles in the capturer 6, and the capture capacity decreases, which eventually causes the vacuum degree to decrease and the devolatilization effect to decrease. After the devolatilization reaches the specified time, the devolatilization ends and the vacuum is broken. For example, a blockage or knob can be set in the devolatilization box 1, and the devolatilization box 1 can be connected to the external air pressure by pulling out the blockage or turning the knob. Then open the door body 2, take out the polymer product, and conduct subsequent sampling and analysis.

[0033] The high-boiling-point volatiles devolatilization equipment of this embodiment can not only simply devolatilize the polymer containing high-boiling-point volatiles to obtain qualified products, but also capture and collect the devolatilized high-boiling-point volatiles for re-recycling, thereby improving the yield and avoiding pollution caused by discharge.

[0034] In the case where the embodiments are not contradictory, at least part of the technical solutions in the embodiments can be recombined to form the substantial technical solution of the utility model. Of course, the embodiments can also be referenced or included in each other. In addition, it should be noted that the adaptive adjustments and modifications made by those skilled in the art when recombining the technical means recorded in the embodiments will also fall within the protection scope of the utility model.

[0035] The technical principle of the present invention is described above in combination with specific implementations, but it should be noted that the above descriptions are only for explaining the principle of the present invention and cannot be interpreted in any way as a specific limitation on the protection scope of the present invention. Based on the explanation here, technicians in this field can think of other specific implementations or equivalent replacements of the present invention without creative work, and they will fall within the protection scope of the present invention.

Claims

1. A high boiling point volatiles devolatilization device, characterized in that: include: A devolatilization box (1), wherein one side of the devolatilization box (1) is open and a door body (2) is connected to the opening, and a sealing member is provided at the connection between the opening and the door body (2); Polymer trays (3) are arranged in the devolatilization box (1) from top to bottom, the top surface of the polymer tray (3) carries the material to be devolatilized, the interior and / or the bottom surface of the polymer tray (3) are provided with a heating structure (4), and the heating structures (4) of adjacent polymer trays (3) are connected via a connecting pipe; The bottom of the devolatilization box (1) is provided with a heat medium inlet (11), the top of the devolatilization box (1) is provided with a heat medium outlet (12), the heating structure (4) of the polymer tray (3) located at the bottom is connected to the heat medium inlet (11), and the heating structure (4) of the polymer tray (3) located at the top is connected to the heat medium outlet (12); A vacuum tube (5) is connected to one side of the devolatilization box (1), a heating element is provided outside the vacuum tube (5), and a catcher (6) is connected to the end of the vacuum tube (5).

2. The high boiling point volatiles devolatilization equipment according to claim 1, characterized in that: The heating structure (4) is a serpentine tube (41) arranged on the bottom surface of the polymer tray (3), and the serpentine tubes (41) of adjacent polymer trays (3) are arranged in a staggered manner.

3. A high boiling point volatiles devolatilization device according to claim 1 or 2, characterized in that: The heating structure (4) is a heating sleeve (42) arranged inside the polymer tray (3).

4. The high boiling point volatiles devolatilization equipment according to claim 1, characterized in that: A first groove is provided at the connection between the door body (2) and the opening, a sealing ring is installed in the first groove, and the outer surface of the sealing ring protrudes from the first groove; a second groove is provided at the connection between the devolatilization box (1) and the door body (2), and the protruding part of the sealing ring is placed in the second groove.

5. The high boiling point volatiles devolatilization equipment according to claim 1, characterized in that: The side of the devolatilization box (1) opposite to the door body (2) is connected to the vacuum tube (5), and the heating element is a jacket (51) arranged outside the vacuum tube (5), and the jacket (51) is filled with a heat medium.

6. The high boiling point volatiles devolatilization equipment according to claim 1, characterized in that: The devolatilization box (1) is equipped with a temperature measuring device and a first vacuum gauge, and the trap (6) is equipped with a second vacuum gauge.

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