A colorimetric purification tower for dicyclopentadiene complex adsorption

Abstract

The utility model discloses a kind of chromaticity purification towers for dicyclopentadiene composite adsorption, the purification tower lower part is provided with rectification section, upper part is provided with adsorption section, the adsorption section includes upper section, lower section, and different molecular sieve adsorbent is arranged in two sections.The adsorption section includes inner tube, the inner tube is placed in the upper portion of purification tower body, and the inner tube includes inner tube upper section, inner tube lower section.In another embodiment, the adsorption section includes upper conical vent plate, lower conical vent plate;Upper conical vent plate, lower conical vent plate divide the upper portion of purification tower body into upper section and lower section.The utility model is suitable for rectification and adsorption process of dicyclopentadiene, adsorption separation and rectification process are integrated, and separation efficiency is improved.The use rate of adsorbent can be effectively improved by using split modularization in adsorption area;The application also provides a kind of parallel adsorption scheme in tower, which is convenient for maintaining adsorbent during continuous production.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically to a color purification tower for dicyclopentadiene composite adsorption. Background Technology

[0002] Color purification of dicyclopentadiene (DCPD) is crucial for product quality and high-end applications. For example, when used as a raw material for optical-grade cyclic olefin copolymers (COC / COP) and engineering plastics, the Gardner color of DCPD generally needs to be less than 4; otherwise, the optical properties of the material will be affected. Furthermore, residual polymers, tar, and sulfides in DCPD not only affect the product's appearance but also trigger side reactions, reducing the solubility and stability of downstream resins. Decolorization processes (such as molecular sieve adsorption and steam-heated vacuum extraction) can increase the transmittance from 50% to over 85%, meeting the needs of high-end resins, pharmaceutical intermediates, and other fields. Currently, adsorption decolorization is commonly used for DCPD after distillation. With increasing technological integration, there are also explorations of simultaneous decolorization within the distillation column. For instance, patent CN101732883A, concerning an adsorption distillation column and its process for decolorizing aromatic solvent oils, discloses installing an adsorption device at the top of the distillation column to integrate adsorption separation and distillation processes. Companies such as CNOOC Tianjin Chemical Research and Design Institute Co., Ltd. and China National Offshore Oil Corporation have also applied for patents related to this technology, including an adsorbent and its preparation method for a coupled dearomatization process of distillate oil adsorption distillation (CN114832786B). These patents describe the composite adsorption process but do not cover the structure of the adsorption region. Summary of the Invention

[0003] The purpose of this invention is to provide a color purification tower for dicyclopentadiene composite adsorption, so as to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides a color purification tower for dicyclopentadiene composite adsorption. The purification tower has a distillation section at the bottom and an adsorption section at the top. The adsorption section includes an upper section and a lower section, and different molecular sieve adsorbents are arranged in the two sections.

[0005] Preferably, the adsorption section includes an inner cylinder, which is placed on the upper part of the purification tower body. The inner cylinder includes an upper section and a lower section, which are connected by bolts. Ventilation baffles are provided in the lower part of the inner cavity of the upper section and the lower section of the inner cylinder. A lower placement ring is provided on the side wall of the upper part of the inner cavity of the purification tower body. The inner diameter of the lower placement ring is smaller than the outer diameter of the lower end of the lower section of the inner cylinder. The inner cylinder is placed on the lower placement ring.

[0006] Preferably, the adsorption section includes an upper conical ventilation plate and a lower conical ventilation plate; the upper and lower conical ventilation plates are conical in shape with a higher center and a lower outer side; the upper and lower conical ventilation plates are evenly provided with ventilation micropores, and the upper and lower conical ventilation plates divide the upper part of the purification tower body into an upper section of the upper region of the upper conical ventilation plate and a lower section between the upper and lower conical ventilation plates, and a number of feed pipes and discharge pipes are provided in the upper and lower parts of the upper and lower sections.

[0007] Preferably, the adsorption section further includes a central partition plate, a top plate, a bottom plate, an upper rotating plate, a lower rotating plate, a rotating shaft, a rotating shaft sleeve, and a drive motor unit; the central partition plate divides the adsorption section into multiple chambers along the axial direction; the central partition plate passes through the upper conical ventilation plate and the lower conical ventilation plate, with a top plate at the top and a bottom plate at the bottom, the top plate and the bottom plate being fixed to the inner wall of the purification tower; an air inlet damper is provided on the top plate and the bottom plate corresponding to each chamber, and the upper conical ventilation plate and the lower conical ventilation plate divide each chamber. The system comprises a parallel upper section in the upper region of the upper conical ventilation plate, a parallel lower section between the upper and lower conical ventilation plates, and several feed pipes and discharge pipes at the top and bottom of the parallel upper and lower sections. A rotating shaft sleeve is located in the center of the central partition plate, with both ends of the rotating shaft sleeve passing through the top and bottom plates. The rotating shaft passes through the rotating shaft sleeve. An upper rotating plate is located at the top of the top plate, and a lower rotating plate is located at the bottom of the bottom plate. The top of the rotating shaft passes through the top of the purification tower and connects to the drive motor unit. The upper and lower rotating plates cover the air inlet damper of at least one chamber.

[0008] Preferably, the central partition forms a cross shape when projected horizontally.

[0009] Preferably, the adsorption section further includes a bottom support plate; the bottom of the rotating shaft is rotatably connected to the bottom support plate located below the lower rotating plate, and both ends of the bottom support plate are fixed to the inner wall of the purification tower.

[0010] Preferably, the diameters of the upper and lower rotating plates are smaller than those of the top and bottom plates; a pressure plate structure is provided on the upper and lower rotating plates near the inner wall of the purification tower along the symmetrical axis of the air inlet damper; the pressure plate structure includes a vertical plate and a horizontal bending plate, the vertical plate is arranged vertically, the horizontal bending plate is arranged horizontally, one end of the horizontal bending plate is fixed to the vertical plate near the inner wall of the purification tower, and the other end extends to the upper part of the air inlet damper.

[0011] Preferably, the two ends of the transverse bending plate are bent upwards in the direction perpendicular to the radius of the purification tower.

[0012] This invention proposes a color purification tower for dicyclopentadiene composite adsorption, suitable for the distillation and adsorption processes of dicyclopentadiene. It integrates adsorption separation and distillation processes into a single unit, achieving simultaneous processing and improving separation efficiency. Structurally, the adsorption zones are arranged in a modular, split configuration. The lower section primarily intercepts large-molecule tar pigments, while the upper section adsorbs small-molecule sulfides, effectively improving adsorbent utilization. Each module can be independently replaced if damaged; for example, the lower tar adsorption module is prone to contamination, resulting in a shorter replacement cycle and reduced maintenance costs. Furthermore, for adsorbent regeneration, this application also provides a parallel adsorption scheme within the tower, using rotary valves to enable the use of different adsorption units, facilitating adsorbent maintenance during continuous production. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the first embodiment of the present invention.

[0014] Figure 2 This is a schematic diagram of the second embodiment of the present invention.

[0015] Figure 3 This is a schematic diagram of the third embodiment of the present invention.

[0016] Figure 4 This is a cross-sectional and partially enlarged schematic diagram of the third embodiment of this utility model.

[0017] Figure 5 This is a schematic diagram of the bottom support plate area in the third embodiment of this utility model.

[0018] Figure 6 This is a schematic diagram of the pressure plate structure of this utility model. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] As attached Figure 1-6 As shown, this utility model relates to a color purification tower for dicyclopentadiene composite adsorption. The purification tower has a rectification section T2 at the bottom and an adsorption section T1 at the top. The adsorption section T1 adopts a modular design, as shown in the attached figure. Figure 1 As shown, the adsorption section T1 includes an upper section 11 and a lower section 12, with different molecular sieve adsorbents used in each section.

[0021] Appendix Figure 1This document provides one embodiment of the adsorption section T1, which includes an inner cylinder T11 placed on the upper part of the purification tower body. The inner cylinder T11 comprises an upper section T111 and a lower section T112, connected by bolts. Ventilation baffles T113 are provided at the lower part of the inner cavities of the upper section T111 and the lower section T112. A lower placement ring T114 is provided on the upper side wall of the inner cavity of the purification tower body. The inner diameter of the lower placement ring T114 is smaller than the outer diameter of the lower end of the lower section T112. During use, the inner cylinder T11 is placed on the lower placement ring T114. A lifting hole is provided in the upper section T111. When replacing the adsorbent, the entire inner cylinder T11 can be lifted out, allowing for separate replacement and maintenance of the upper section T111 and the lower section T112.

[0022] Appendix Figure 2 This provides a second embodiment of the adsorption section T1, which is arranged between an upper conical ventilation plate T121 and a lower conical ventilation plate T122. Both the upper and lower conical ventilation plates T121 and T122 are uniformly provided with ventilation micropores. The upper and lower conical ventilation plates T121 and T122 divide the upper part of the purification tower into an upper section 11 (the upper area of ​​the upper conical ventilation plate T121) and a lower section 12 (the area between the upper and lower conical ventilation plates T121 and T122). Several feed pipes J and discharge pipes C are provided at the upper and lower parts of the upper and lower sections 11 and 12, respectively. When replacing the adsorbent, the replacement and maintenance of the adsorbent can be achieved through the feed pipes J and discharge pipes C. The upper conical vent plate T121 and the lower conical vent plate T122 are conical in shape, with a higher center and a lower outer edge, which facilitates the flow of adsorbent from the discharge pipe C. During discharge, a vibrator can be used to assist in the discharge process. The feed pipe J and the discharge pipe C are openable and closable structures; the specific opening and closing structure is standard knowledge in the field.

[0023] Appendix Figure 3 , 4 The third embodiment of the adsorption section T1 provided in 5 adopts a parallel adsorption scheme in the tower, providing online maintenance of the adsorbent without interrupting production. Based on the second embodiment, the adsorption section T1 further includes a central partition plate T131, a top plate T132, a bottom plate T133, an upper rotating plate T134, a lower rotating plate T135, a bottom support plate T136, a rotating shaft T137, a rotating shaft sleeve T138, and a drive motor unit (not shown).

[0024] The central partition plate T131 divides the adsorption section T1 into multiple chambers along the axial direction. Figure 3 The central partition T131 in the middle forms a cross shape when projected horizontally. (Attached) Figure 3The right side shows a top view of the central partition plate T131, which divides the adsorption section T1 into four equal chambers along the axial direction. The central partition plate T131 extends through the upper conical ventilation plate T121 and the lower conical ventilation plate T122. A top plate T132 is provided at the top, and a bottom plate T133 is provided at the bottom. The top plate T132 and the bottom plate T133 are fixed to the inner wall of the purification tower.

[0025] An air inlet damper F is provided on the top plate T132 and bottom plate T133 corresponding to each chamber. The upper conical vent plate T121 and the lower conical vent plate T122 divide each chamber into a parallel upper section B11 (the upper area of ​​the upper conical vent plate T121) and a parallel lower section B12 (the area between the upper conical vent plate T121 and the lower conical vent plate T122). Several feed pipes J and discharge pipes C are provided at the upper and lower parts of the parallel upper section B11 and the parallel lower section B12.

[0026] A rotating sleeve T138 is installed in the center of the central partition plate T131 (along the axis of the purification tower). Both ends of the rotating sleeve T138 pass through the top plate T132 and the bottom plate T133. A rotating shaft T137 passes through the rotating sleeve T138. An upper rotating plate T134 is installed above the top plate T132, and a lower rotating plate T135 is installed below the bottom plate T133. The top of the rotating shaft T137 passes through the top of the purification tower and connects to the drive motor unit, which can drive the upper rotating plate T134 and the lower rotating plate T135 to rotate. The bottom of the rotating shaft T137 is rotatably connected to a bottom support plate T136 located below the lower rotating plate T135. Both ends of the bottom support plate T136 are fixed to the inner wall of the purification tower. The drive motor unit is standard knowledge in the field.

[0027] The upper rotating plate T134 and the lower rotating plate T135 can cover the air intake damper F of at least one chamber. Figure 3 In the middle, both the upper rotating plate T134 and the lower rotating plate T135 can cover two oppositely arranged air intake dampers F. By rotating the upper rotating plate T134 and the lower rotating plate T135, the air intake damper F of a certain chamber can be closed and opened. In continuous production, the air intake damper F of a certain chamber can be closed for maintenance.

[0028] More specifically, as shown in the appendix Figure 6As shown, the diameters of the upper rotating plate T134 and the lower rotating plate T135 are smaller than those of the top plate T132 and the bottom plate T133. A pressure plate structure T139 is provided on the upper rotating plate T134 and lower rotating plate T135 near the inner wall of the purification tower along the symmetrical axis of the air intake damper F. The pressure plate structure T139 includes a vertical plate T1391 and a horizontal bending plate T1392. The vertical plate T1391 is arranged vertically, and the horizontal bending plate T1392 is arranged horizontally. One end of the horizontal bending plate T1392 is fixed to the vertical plate T1391 near the inner wall of the purification tower, and the other end extends to the upper part of the air intake damper. The two ends of the horizontal bending plate T1392 are bent upward (at both ends perpendicular to the radius of the purification tower). The central area is the closest to the top plate T132 and the bottom plate T133, and its height is equal to the edge height of the upper rotating plate T134 and the lower rotating plate T135. This can assist in pressing the upper rotating plate T134 and the lower rotating plate T135. At the same time, the upward bending of the two ends of the horizontal bending plate T1392 facilitates the rotation of the upper rotating plate T134 and the lower rotating plate T135.

[0029] It should be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A color purification tower for dicyclopentadiene composite adsorption, wherein the purification tower has a rectification section at the bottom and an adsorption section at the top, characterized in that, The adsorption section includes an upper section and a lower section, with different molecular sieve adsorbents arranged in the two sections. The adsorption section includes an inner cylinder, which is placed on the upper part of the purification tower body. The inner cylinder includes an upper section and a lower section, which are connected by bolts. Ventilation baffles are provided in the lower part of the inner cavity of the upper section and the lower section of the inner cylinder. A lower placement ring is provided on the upper side wall of the inner cavity of the purification tower body. The inner diameter of the lower placement ring is smaller than the outer diameter of the lower end of the lower section of the inner cylinder. The inner cylinder is placed on the lower placement ring.

2. The color purification tower for dicyclopentadiene composite adsorption according to claim 1, characterized in that, The adsorption section includes an upper conical ventilation plate and a lower conical ventilation plate; the upper and lower conical ventilation plates are conical in shape with a higher center and a lower outer side; the upper and lower conical ventilation plates are evenly provided with ventilation micropores, and the upper and lower conical ventilation plates divide the upper part of the purification tower body into an upper section of the upper region of the upper conical ventilation plate and a lower section between the upper and lower conical ventilation plates. Several feed pipes and discharge pipes are provided in the upper and lower parts of the upper and lower sections.

3. The color purification tower for dicyclopentadiene composite adsorption according to claim 2, characterized in that, The adsorption section further includes a central partition plate, a top plate, a bottom plate, an upper rotating plate, a lower rotating plate, a rotating shaft, a rotating shaft sleeve, and a drive motor unit. The central partition plate divides the adsorption section into multiple chambers along its axial direction. The central partition plate extends through the upper conical ventilation plate and the lower conical ventilation plate, with a top plate at the top and a bottom plate at the bottom, both fixed to the inner wall of the purification tower. An air inlet damper is provided on the top and bottom plates corresponding to each chamber. The upper and lower conical ventilation plates divide each chamber into upper and lower conical sections. The upper section of the conical ventilation plate, the lower section of the upper conical ventilation plate and the lower conical ventilation plate are connected in parallel. Several feed pipes and discharge pipes are set at the upper and lower parts of the upper and lower sections of the parallel upper and lower sections. A rotating shaft sleeve is set in the center of the central partition plate. The two ends of the rotating shaft sleeve pass through the top plate and the bottom plate. The rotating shaft passes through the rotating shaft sleeve. An upper rotating plate is set at the upper part of the top plate and a lower rotating plate is set at the lower part of the bottom plate. The top of the rotating shaft passes through the top of the purification tower and is connected to the drive motor unit. The upper rotating plate and the lower rotating plate cover the air inlet damper of at least one chamber.

4. The color purification tower for dicyclopentadiene composite adsorption according to claim 3, characterized in that, The central divider forms a cross shape when projected horizontally.

5. The color purification tower for dicyclopentadiene composite adsorption according to claim 3, characterized in that, The adsorption section also includes a bottom support plate; the bottom of the rotating shaft is rotatably connected to the bottom support plate located below the lower rotating plate, and both ends of the bottom support plate are fixed to the inner wall of the purification tower.

6. The color purification tower for dicyclopentadiene composite adsorption according to claim 3, characterized in that, The upper and lower rotating plates have smaller diameters than the top and bottom plates. A pressure plate structure is provided on the upper and lower rotating plates near the inner wall of the purification tower along the symmetrical axis of the air inlet damper. The pressure plate structure includes a vertical plate and a horizontal bending plate. The vertical plate is arranged vertically, and the horizontal bending plate is arranged horizontally. One end of the horizontal bending plate is fixed to the vertical plate near the inner wall of the purification tower, and the other end extends to the upper part of the air inlet damper.

7. The color purification tower for dicyclopentadiene composite adsorption according to claim 6, characterized in that, The two ends of the transverse bending plate, perpendicular to the radius of the purification tower, are bent upwards.

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