A continuously operating adsorption column and purification system

Abstract

The utility model discloses a kind of continuously operated adsorption tower and purification system, wherein adsorption tower includes: shell, adsorption cavity is formed inside the shell;Stirring shaft, the stirring shaft is set in the adsorption cavity along the axial direction of adsorption cavity;Suspension mechanism, the suspension mechanism includes barrier, one end of the barrier is connected with the inner wall of the shell, the other end extends to the stirring shaft direction, and the height of the one end of barrier and the inner wall connection in vertical direction is higher than the height of the one end extending to the stirring shaft direction, the barrier forms the surface that is inclined from inner wall to the stirring shaft direction in the adsorption cavity.The liquid in tower exists in suspension state by the setting of suspension mechanism, improve the contact opportunity of adsorbent and fish oil, solvent, improve the efficiency of adsorption, washing or desorption.

Description

Technical Field

[0001] This utility model relates to separation and purification equipment, specifically to a continuously operating adsorption tower and purification system. Background Technology

[0002] EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) in fish oil are important functional fatty acids that promote cardiovascular health, improve brain development, and have anti-inflammatory effects. Currently, DHA and EPA are mainly separated and purified using urea inclusion technology, high-vacuum distillation technology, or high-pressure chromatography, but these methods have problems such as generating large amounts of wastewater and high separation costs.

[0003] Adsorption towers utilize adsorbents to adsorb specific substances from gases or liquids, thereby removing pollutants or separating target substances. Using adsorption towers for separation and purification offers advantages such as high efficiency, economy, ease of operation, and environmental friendliness. However, how to efficiently separate EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) from fish oil using adsorption towers remains a problem that urgently needs to be solved. Utility Model Content

[0004] The purpose of this invention is to provide a continuously operating adsorption tower and purification system for the efficient separation of DHA and EPA.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a continuously operating adsorption tower, comprising:

[0006] A housing, with an adsorption cavity formed inside the housing;

[0007] A stirring shaft is disposed within the adsorption chamber along the axial direction of the adsorption chamber.

[0008] The suspension mechanism includes a barrier member, one end of which is connected to the inner wall of the housing, and the other end extends toward the stirring shaft. The height of the end of the barrier member connected to the inner wall is higher in the vertical direction than the height of the end extending toward the stirring shaft. The barrier member forms a surface in the adsorption chamber that is inclined from the inner wall toward the stirring shaft.

[0009] Furthermore, the barrier is a ring-shaped, trumpet-shaped structure, with one end connected to the inner wall of the shell forming a large opening and the other end near the stirring shaft forming a small opening. The adsorbent above the barrier moves downward through the small opening.

[0010] Furthermore, the suspension mechanism also includes a stirring paddle disposed within the barrier cavity formed by the barrier member, the stirring paddle being connected to the stirring shaft and rotating and stirring under the drive of the stirring shaft.

[0011] Furthermore, multiple barrier elements are provided, arranged sequentially from top to bottom along the inner wall of the housing.

[0012] Furthermore, the suspension mechanism also includes a baffle disposed on the inner wall of the housing. The baffle is arranged vertically, and the liquid in the adsorption chamber will hit the baffle as the stirring paddle rotates.

[0013] Furthermore, multiple sets of baffles are provided on the inner wall of the housing. Each set of baffles is disposed between two adjacent barrier members, and each set of baffles includes multiple baffles arranged circumferentially on the inner wall of the housing.

[0014] Furthermore, it also includes an internal circulation mechanism, which includes a circulation pipe. One end of the circulation pipe is connected to the bottom of the adsorption chamber, and the other end is connected to the top of the adsorption chamber. A circulation pump is installed on the circulation pipe, and the circulation pump transports the liquid at the bottom of the adsorption tower to the top of the adsorption tower through the circulation pipe.

[0015] A continuously operating purification system includes an adsorption tower as described above, and a filter and a washing tower connected in sequence with the adsorption tower. After the liquid is discharged from the adsorption tower, it is separated by the filter. The separated mother liquor enters a DHA collector connected to the filter for collection, and the adsorbent enters the washing tower for washing.

[0016] Furthermore, it also includes a desorption tower, which is connected to a washing tower via a third filter. The third filter is connected to the DHA collector. The suspension discharged from the washing tower is separated by the third filter, and the separated mother liquor flows into the DHA collector. The separated adsorbent enters the desorption tower for desorption.

[0017] Furthermore, it also includes a fourth filter, which is connected to both the adsorption tower and the desorption tower, and is also connected to the EPA collector.

[0018] The beneficial effects of this utility model are:

[0019] 1) By setting up a suspension mechanism, the liquid in the tower is kept in a suspended state, which increases the contact opportunities between the adsorbent and fish oil and solvent, thereby improving the efficiency of adsorption, washing or desorption.

[0020] 2) By setting up a suspension mechanism, the time it takes for the adsorbent to flow from the inlet to the outlet can be extended, so that the time the adsorbent spends in the tower meets the set requirements, thus realizing continuous operation of separation and purification. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the purification system connection according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of an adsorption tower according to an embodiment of the present invention.

[0025] In the diagram: 1. Adsorption tower; 11. Stirring mechanism; 111. Motor; 112. Stirring shaft; 113. Stirring paddle; 12. Barrier component; 121. Large opening end face; 122. Small opening end face; 123. Barrier chamber; 13. Baffle; 14. Internal circulation mechanism; 141. Circulation pipeline; 142. Circulation pump; 15. Inlet and outlet components; 151. Adsorbent inlet; 152. Solvent inlet; 153. Fish oil inlet; 154. Outlet; 16. Shell; 17. Adsorption chamber; 2. Filter; 21. First filter; 22. Second filter; 23. Third filter; 24. Fourth filter; 3. First washing tower; 4. Second washing tower; 5. Desorption tower; 6. DHA collector; 7. EPA collector. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0027] See appendix Figure 1 As shown, a continuously operating purification system in this embodiment includes an adsorption tower 1 and a desorption tower 5. Fish oil, adsorbent, and solvent are added to the adsorption tower 1. The adsorbent adsorbs EPA in the fish oil, and DHA dissolves in the solvent, thereby achieving the separation of DHA and EPA.

[0028] See appendix Figure 2As shown, the adsorption tower 1 includes a shell 16, inside which an adsorption chamber 17 is formed. The adsorption chamber 17 has a slender structure from top to bottom, including a first adsorption chamber in the upper cylindrical shape and a second adsorption chamber in the lower inverted conical shape. Inlet and outlet assemblies 15 are provided on the shell 16 for feeding or discharging materials. Specifically, an adsorbent inlet 151, a solvent inlet 152, and a fish oil inlet 153 are provided at the upper part of the adsorption chamber 17, respectively for continuously adding adsorbent, solvent, and fish oil into the tower. An outlet 154 is provided at the lower part of the adsorption chamber 17 for discharging the adsorbent and solvent that have undergone adsorption from the adsorption tower 1 and into the next process equipment.

[0029] In some embodiments, the adsorption tower 1 further includes a stirring mechanism 11, which includes a motor 111 disposed at the top of the housing 16. The motor 111 passes through the housing 16 and is connected to a stirring shaft 112 located in the adsorption chamber 17. The stirring shaft 112 is vertically arranged from top to bottom and extends towards the bottom of the adsorption chamber 17. Multiple sets of stirring paddles 113 are arranged on the stirring shaft 112. The multiple sets of stirring paddles 113 are vertically arranged with the stirring shaft 112, and the distance between two adjacent sets of stirring paddles 113 is equal. This can better stir the adsorbent, solvent, and fish oil in the adsorption chamber 17, so that the adsorbent, solvent, and fish oil form a suspension. The adsorbent can fully contact the solvent and fish oil, and the adsorbent can better adsorb EPA.

[0030] In some embodiments, a suspension mechanism disposed within the adsorption chamber is further included to ensure that the adsorbent remains suspended within the adsorption chamber. The suspension mechanism includes a barrier 12, one end of which is connected to the inner wall of the housing 16, and the other end extends toward the stirring shaft 112. The end connected to the inner wall is at a higher height in the vertical direction than the end extending toward the stirring shaft 112. The barrier 12 forms a surface inclined from the inner wall toward the stirring shaft 112 within the adsorption chamber 17, which is used to block the adsorbent, prevent the adsorbent from settling in the vertical direction, prolong the time taken for the adsorbent to travel from the inlet to the outlet 154, and improve the adsorption effect of the adsorbent.

[0031] In some embodiments, the barrier 12 is an annular, horn-shaped structure, with one end connected to the inner wall of the housing 16 forming a large opening end face 121, and the other end near the stirring shaft 112 forming a small opening end face 122. The adsorbent located above the barrier 12 can only move downward through the small opening end face 122.

[0032] In some embodiments, the suspension mechanism includes a stirring paddle 113 disposed between the small-mouth end face 122 and the large-mouth end face 121 at a vertical height. The stirring paddle 113 is located within the barrier chamber formed by the barrier member. When the adsorbent flows along the barrier member 12 towards the small-mouth end face 122, the stirring paddle 113 stirs the liquid, making the suspension in the barrier chamber more violently agitated. The adsorbent rotates upwards with the stirred solvent, causing it to move upwards. After a period of time, the adsorbent moves downwards due to gravity. Therefore, by setting up the suspension mechanism, the adsorbent moves up and down back and forth within the adsorption tower 1, keeping it in a suspended state and preventing rapid settling, thus increasing the adsorption time within the adsorption tower 1.

[0033] In some embodiments, the stirring paddle 113 disposed between the small end face 122 and the large end face 121 is disposed close to the small end face 122. The adsorbent moves along the barrier towards the small end face 122. When it is close to the small end face 122, due to the vigorous stirring of the stirring paddle, the adsorbent moves upward, prolonging the time the adsorbent moves along the barrier 12, thereby prolonging the total time the adsorbent spends in the adsorption tower 1.

[0034] In some embodiments, the suspension mechanism further includes a baffle 13 disposed on the inner wall of the housing 16. The baffle 13 is disposed in a vertical direction. As the suspension rotates with the stirring paddle 113, it will hit the baffle 13, causing the suspension to roll up and down along the baffle 13, preventing the suspension from swirling, increasing the probability of collision between the adsorbent and the fish oil, and improving the adsorption effect of the adsorbent.

[0035] In some embodiments, multiple sets of baffles 13 are provided on the inner wall of the housing 16. Each set of baffles 13 is disposed between two adjacent barrier members 12. Each set of baffles 13 consists of four baffles, which are arranged circumferentially on the inner wall of the housing 16.

[0036] In some embodiments, multiple suspension mechanisms are provided, arranged sequentially from top to bottom along the inner wall of the housing 16, to block and suspend the adsorbent layer by layer, thereby extending the time it takes for the adsorbent to travel from the inlet to the outlet 154.

[0037] In some embodiments, the adsorption tower 1 further includes an internal circulation mechanism 14, which includes a circulation pipe 141. One end of the circulation pipe 141 is connected to the bottom of the adsorption tower 1, and the other end is connected to the top of the adsorption tower 1. A circulation pump 142 is installed on the circulation pipe 141. The circulation pump 142 transports the suspension at the bottom of the adsorption tower 1 to the top of the adsorption tower 1 through the circulation pipe 141, so that the adsorbent is re-adsorbed from the adsorption tower 1. The average residence time of the adsorbent in the adsorption tower 1 is 3 to 10 hours. If some of the adsorbent settles too quickly and the residence time is insufficient, it can be recirculated back into the adsorption tower 1 through the internal circulation mechanism 14.

[0038] This application also discloses a continuous purification system, which includes a washing tower and a filter 2. After the suspension is discharged from the adsorption tower 1, it is separated by the filter. The separated mother liquor is collected in the DHA collector 6, and the adsorbent is washed in the washing tower to improve the purity of EPA.

[0039] Specifically, see Appendix Figure 1 As shown, the purification system includes an adsorption tower 1, a filter 2, a first washing tower 3, and a second washing tower 4 connected in sequence. The filter 2 includes a first filter 21, a second filter 22, a third filter 23, and a fourth filter 24. The suspension discharged from the adsorption tower 1 is separated by the first filter 21, and the separated mother liquor flows into the DHA collector 6. The separated adsorbent enters the first washing tower 3, and a solvent is simultaneously introduced into the first washing tower 3 to wash the adsorbent. The suspension discharged from the first washing tower 3 is separated by the second filter 22, and the separated mother liquor flows into the DHA collector 6. The separated adsorbent enters the second washing tower 4 for further washing.

[0040] By setting up a washing tower to wash the adsorbent and remove the small amount of DHA adsorbed by the adsorbent, the purity of EPA after separation is improved on the one hand, and the purification yield of DHA is improved on the other hand.

[0041] In some embodiments, the system further includes a desorption tower 5, which is connected to a third filter 23 and a second washing tower 4. The suspension discharged from the second washing tower 4 is separated by the third filter 23, and the separated mother liquor flows into the DHA collector 6. The separated adsorbent enters the desorption tower 5 for desorption. After desorption in the desorption tower 5, the EPA is dissolved in the solvent, and the desorbed solution is filtered by a fourth filter 21. The filtered mother liquor enters the EPA collector 7 for collection, and the filtered adsorbent enters the adsorption tower 1 for reuse.

[0042] In some embodiments, the specific structures of the washing tower and desorption tower are similar to those of the adsorption tower, and will not be described in detail here.

[0043] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0044] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A continuously operating adsorption tower, characterized in that, include: The housing (16) forms an adsorption cavity (17) inside the housing (16). A stirring shaft (112) is disposed in the adsorption chamber (17) along the axial direction of the adsorption chamber (17); The suspension mechanism includes a barrier (12), one end of which is connected to the inner wall of the housing (16), and the other end extends toward the stirring shaft (112). The height of the end of the barrier (12) connected to the inner wall is higher in the vertical direction than the height of the end extending toward the stirring shaft (112). The barrier (12) forms a surface in the adsorption cavity (17) that is inclined from the inner wall toward the stirring shaft (112).

2. The continuously operating adsorption tower according to claim 1, characterized in that, The barrier (12) is a ring-shaped, trumpet-shaped structure. One end connected to the inner wall of the shell (16) forms a large opening end face (121), and the other end near the stirring shaft (112) forms a small opening end face (122). The adsorbent located above the barrier (12) moves downward through the small opening end face (122).

3. The continuously operating adsorption tower according to claim 2, characterized in that, The suspension mechanism also includes a stirring paddle (113) disposed in the barrier chamber (123) formed by the barrier member (12), the stirring paddle (113) being connected to the stirring shaft (112) and rotating and stirring under the drive of the stirring shaft (112).

4. The continuously operating adsorption tower according to claim 1, characterized in that, Multiple barrier elements (12) are provided, arranged sequentially from top to bottom along the inner wall of the housing (16).

5. The continuously operating adsorption tower according to claim 1, characterized in that, The suspension mechanism also includes a baffle (13) disposed on the inner wall of the housing (16). The baffle (13) is disposed in a vertical direction. The liquid in the adsorption chamber (17) will hit the baffle (13) as the stirring paddle (113) rotates.

6. The continuously operating adsorption tower according to claim 5, characterized in that, Multiple sets of baffles (13) are provided on the inner wall of the housing (16). Each set of baffles (13) is provided between two adjacent barrier members (12). Each set of baffles (13) includes multiple baffles (13) and is circumferentially provided on the inner wall of the housing (16).

7. The continuously operating adsorption tower according to claim 1, characterized in that, It also includes an internal circulation mechanism (14), which includes a circulation pipe (141). One end of the circulation pipe (141) is connected to the bottom end of the adsorption chamber (17), and the other end is connected to the top end of the adsorption chamber (17). A circulation pump (142) is provided on the circulation pipe (141). The circulation pump (142) transports the liquid at the bottom of the adsorption tower (1) to the top of the adsorption tower (1) through the circulation pipe (141).

8. A continuously operating purification system, comprising the continuously operating adsorption tower according to any one of claims 1-7, characterized in that, It also includes a filter (2) and a washing tower connected in sequence with the adsorption tower (1). After the liquid is discharged from the adsorption tower (1), it is separated by the filter (2). The separated mother liquor enters the DHA collector (6) connected to the filter (2) for collection, and the adsorbent enters the washing tower for washing.

9. The continuously operating purification system according to claim 8, characterized in that, It also includes a desorption tower (5), which is connected to a washing tower via a third filter (23). The third filter (23) is connected to the DHA collector (6). The suspension discharged from the washing tower is separated by the third filter (23). The separated mother liquor flows into the DHA collector (6), and the separated adsorbent enters the desorption tower (5) for desorption.

10. The continuously operating purification system according to claim 9, characterized in that, It also includes a fourth filter (24), which is connected to both the adsorption tower (1) and the desorption tower (5), and is also connected to the EPA collector (7).

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