Impurity removal and desalination system and method for calcium pantothenate feed liquid

Abstract

The invention discloses a calcium pantothenate feed liquid impurity removal and desalination system which comprises an absorption liquid collection device, a fresh water collection device, an electrode liquid circulation device and an electrodialysis assembly, and the absorption liquid collection device, the fresh water collection device and the electrode liquid circulation device are all communicated with the electrodialysis assembly. The invention also provides a calcium pantothenate feed liquid impurity removal and desalination method, which utilizes the calcium pantothenate feed liquid impurity removal and desalination system, the absorption liquid, the calcium pantothenate feed liquid and the polar liquid are respectively added into the absorption liquid collection device, the fresh water collection device and the polar liquid circulation device, and are respectively introduced into the electrodialysis assembly; the electrodialysis assembly is used for absorbing salt in the calcium pantothenate feed liquid entering the electrodialysis assembly into the absorption liquid entering the electrodialysis assembly. According to the calcium pantothenate feed liquid impurity removal and desalination system and method, sodium chloride is removed through electrodialysis, the treatment efficiency is high, the energy consumption is low, the salt content in fresh water treated through electrodialysis is reduced, the purity is improved, and the wastewater discharge amount is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of chemical production, and in particular to a system and method for removing impurities and desalting calcium pantothenate liquid. Background Art

[0002] At present, the production of calcium pantothenate in the world is mainly based on the mother method. Calcium pantothenate is a form of vitamin B5, also known as pantothenic acid or pantothenic acid calcium salt. It is widely used as a supplement in the pharmaceutical and food industries, and has the effects of promoting cell metabolism and enhancing the body's immunity.

[0003] At present, the salt content in the calcium pantothenate fermentation broth is relatively high (about 40ms / cm). We want to use electrodialysis desalination technology to develop a special desalination and impurity removal process for this slurry to optimize the existing production process and improve production efficiency. Specific goal: desalt the slurry to a conductivity of less than 3ms / cm and a high desalination efficiency. At present, calcium pantothenate slurry mostly uses strong acid ion exchange resin to adsorb sodium chloride, calcium and magnesium ions. However, this process is complex, has a long production cycle, low efficiency, and high energy consumption, and a large amount of wastewater will be generated when the resin is regenerated. Summary of the invention

[0004] The purpose of the present invention is to provide a calcium pantothenate slurry impurity removal and desalination system and method to solve the problems existing in the above-mentioned related technologies. The electrodialysis method is used for desalination, which has high treatment efficiency and low energy consumption, and reduces the amount of wastewater discharged.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a calcium pantothenate liquid impurity removal and desalination system, comprising:

[0007] An absorption liquid collecting device, wherein the absorption liquid collecting device is used to store the absorption liquid;

[0008] A fresh water collection device, which can store fresh water and is connected to a source of calcium pantothenate liquid;

[0009] A polar liquid circulation device, the polar liquid circulation device is used to store polar liquid;

[0010] The electrodialysis component, the absorption liquid collecting device, the fresh water collecting device and the polar liquid circulation device are all connected to the electrodialysis component to transport the absorption liquid, calcium pantothenate liquid and polar liquid to the electrodialysis component for electrodialysis desalination and purification.

[0011] Preferably, the absorption liquid collecting device comprises an absorption liquid collecting tank capable of containing the absorption liquid, the absorption liquid collecting tank having a first liquid inlet, a first liquid outlet and a first reflux port, and the first liquid inlet is connected to the absorption liquid source;

[0012] The fresh water collection device comprises a fresh water collection tank capable of containing fresh water, wherein the fresh water collection tank has a second liquid inlet, a second liquid outlet and a second reflux port, and the second liquid inlet is connected to a source of calcium pantothenate liquid;

[0013] The cathode liquid circulation device comprises an cathode liquid tank capable of containing the cathode liquid, the cathode liquid tank having a third liquid inlet, a third liquid outlet and a third reflux outlet, and the third liquid inlet is connected to the cathode liquid source;

[0014] The electrodialysis component has an absorption liquid inlet, an absorption liquid reflux port, a feed liquid inlet, a feed liquid reflux port, an extreme liquid inlet and an extreme liquid reflux port. The first liquid outlet is connected to the absorption liquid inlet, the absorption liquid reflux port is connected to the first reflux port, the second liquid outlet is connected to the feed liquid inlet, the feed liquid reflux port is connected to the second reflux port, the third liquid outlet is connected to the extreme liquid inlet, and the extreme liquid reflux port is connected to the third reflux port.

[0015] Preferably, the first liquid inlet is connected to the absorption liquid source via an absorption liquid inlet pipe, the first liquid outlet is connected to the absorption liquid inlet via an absorption liquid outlet pipe, and the absorption liquid reflux port is connected to the first reflux port via an absorption liquid reflux pipe;

[0016] The second liquid inlet is connected to the source of calcium pantothenate liquid via a liquid inlet pipeline, the second liquid outlet is connected to the liquid inlet via a liquid outlet pipeline, and the liquid reflux port is connected to the second reflux port via a liquid reflux pipeline;

[0017] The third liquid inlet is connected to the polar liquid source via a polar liquid inlet pipe, the third liquid outlet is connected to the polar liquid inlet via a polar liquid outlet pipe, and the third reflux port is connected to the polar liquid reflux port via a polar liquid reflux pipe.

[0018] Preferably, the absorption liquid inlet pipeline, the feed liquid inlet pipeline and the pole liquid inlet pipeline are all provided with control valves; the absorption liquid outlet pipeline, the feed liquid outlet pipeline and the pole liquid outlet pipeline are all provided with control valves, feed pumps, filters, pressure sensors and temperature sensors; the absorption liquid reflux pipeline, the feed liquid reflux pipeline and the pole liquid reflux pipeline are all provided with temperature sensors; the filtration accuracy of the filter is 1μm to 20μm.

[0019] Preferably, the calcium pantothenate slurry impurity removal and desalination system further comprises a heat exchange mechanism, which is disposed on the absorption liquid reflux pipeline and can exchange heat with the absorption liquid in the absorption liquid reflux pipeline.

[0020] Preferably, the temperature of the absorption liquid flowing back to the absorption liquid collecting device is in the range of 30°C to 45°C.

[0021] Preferably, the first liquid outlet is also connected to an absorption liquid drainage pipeline; the second liquid outlet is connected to a fresh water drainage pipeline for discharging fresh water; the third liquid outlet is connected to an extreme liquid drainage pipeline;

[0022] The absorption liquid discharge pipeline, the fresh water discharge pipeline and the extreme liquid discharge pipeline are all provided with control valves.

[0023] Preferably, there are multiple absorption liquid collecting tanks, which are arranged in parallel; there are multiple fresh water collecting tanks, which are arranged in parallel.

[0024] The present invention provides a method for removing impurities and desalting a calcium pantothenate slurry. The method utilizes the calcium pantothenate slurry impurity removal and desalting system. The absorption liquid collecting device passes the absorption liquid into the electrodialysis component, the fresh water collecting device passes the calcium pantothenate slurry into the electrodialysis component, and the polar liquid circulation device passes the polar liquid into the electrodialysis component. The salt in the calcium pantothenate slurry is absorbed by the absorption liquid, and the impurities are filtered out, thereby achieving desalting and impurity removal.

[0025] Preferably, the operating temperature range of the electrodialysis component is 25°C to 30°C.

[0026] Compared with the related art, the present invention has achieved the following technical effects: the calcium pantothenate slurry impurity removal and desalination system of the present invention includes an absorption liquid collecting device, a fresh water collecting device, an electrode liquid circulation device and an electrodialysis component, the absorption liquid collecting device is used to store absorption liquid; the fresh water collecting device can store fresh water and is connected to the source of calcium pantothenate slurry; the electrode liquid circulation device is used to store electrode liquid; the absorption liquid collecting device, the fresh water collecting device and the electrode liquid circulation device are all connected to the electrodialysis component to realize the absorption liquid, calcium pantothenate slurry and electrode liquid being transported to the electrodialysis component for electrodialysis desalination and purification.

[0027] The present invention also provides a method for removing impurities from a calcium pantothenate slurry and desalting it. The calcium pantothenate slurry and desalting it system is used to add an absorption liquid, a calcium pantothenate slurry and a polar liquid to an absorption liquid collecting device, a fresh water collecting device and a polar liquid circulating device, respectively, and the absorption liquid, the calcium pantothenate slurry and the polar liquid are respectively introduced into an electrodialysis component, and the electrodialysis component is used to allow the salt in the calcium pantothenate slurry entering therein to be absorbed into the absorption liquid entering therein. The calcium pantothenate slurry and desalting it system and method of the present invention remove sodium chloride by electrodialysis, have high processing efficiency and low energy consumption, reduce the salt content in the fresh water treated by electrodialysis, improve the purity, and reduce the amount of wastewater discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in 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 paying creative work.

[0029] Figure 1 It is a schematic diagram of a calcium pantothenate liquid impurity removal and desalination system disclosed in an embodiment of the present invention;

[0030] Figure 2 It is a front view schematic diagram of a calcium pantothenate liquid impurity removal and desalination system disclosed in an embodiment of the present invention;

[0031] Figure 3 It is a schematic top view of a calcium pantothenate liquid impurity removal and desalination system disclosed in an embodiment of the present invention;

[0032] Figure 4 It is a side schematic diagram of a calcium pantothenate liquid impurity removal and desalination system disclosed in an embodiment of the present invention.

[0033] In the figure: 1. Calcium pantothenate liquid impurity removal and desalination system;

[0034] 10. Absorption liquid collecting device; 11. First liquid outlet; 12. First reflux outlet; 13. Absorption liquid collecting tank; 14. First liquid inlet; 15. Absorption liquid inlet pipeline; 16. Absorption liquid discharge pipeline;

[0035] 20. Fresh water collecting device; 21. Second liquid outlet; 22. Second reflux port; 23. Fresh water collecting tank; 24. Second liquid inlet; 25. Liquid inlet pipeline; 26. Fresh water discharge pipeline;

[0036] 30. Electrode liquid circulation device; 31. Third liquid outlet; 32. Third reflux outlet; 33. Electrode liquid tank; 34. Third liquid inlet; 35. Electrode liquid inlet pipeline; 36. Electrode liquid discharge pipeline;

[0037] 40. Electrodialysis assembly; 41. Absorption liquid inlet; 42. Absorption liquid reflux port; 43. Feed liquid inlet; 44. Feed liquid reflux port; 45. Electrolytic liquid inlet; 46. Electrolytic liquid reflux port;

[0038] 50. Absorption liquid outlet pipe;

[0039] 60. Absorption liquid reflux pipeline;

[0040] 70. Liquid outlet pipeline;

[0041] 80. Liquid reflux pipeline;

[0042] 90. Filter;

[0043] 100. Extreme liquid outlet pipeline;

[0044] 110. Extreme liquid return pipe;

[0045] 120. Heat exchange mechanism;

[0046] 130. Control valve;

[0047] 140. Feed pump;

[0048] 150. Temperature sensor;

[0049] 160. Pressure sensor. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] The purpose of the present invention is to provide a calcium pantothenate slurry impurity removal and desalination system and method to solve the problems existing in the above-mentioned related technologies. The electrodialysis method is used for desalination, which has high treatment efficiency and low energy consumption, and reduces the amount of wastewater discharged.

[0052] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] Embodiment 1

[0054] The present embodiment provides a calcium pantothenate slurry impurity removal and desalination system 1, comprising an absorption liquid collecting device 10, a fresh water collecting device 20, an extreme liquid circulation device 30 and an electrodialysis component 40, wherein the absorption liquid collecting device 10 is used to store absorption liquid; the fresh water collecting device 20 can store fresh water and is connected to a source of calcium pantothenate slurry; the extreme liquid circulation device 30 is used to store extreme liquid; the absorption liquid collecting device 10, the fresh water collecting device 20 and the extreme liquid circulation device 30 are all connected to the electrodialysis component 40 to realize the transportation of the absorption liquid, the calcium pantothenate slurry and the extreme liquid to the electrodialysis component 40 for electrodialysis desalination and purification.

[0055] The calcium pantothenate slurry impurity removal and desalination system 1 of the present invention, when working, adds absorption liquid, calcium pantothenate slurry and polar liquid to the absorption liquid collecting device 10, the fresh water collecting device 20, and the polar liquid circulation device 30 respectively, and respectively passes into the electrodialysis component 40, and the electrodialysis component 40 is used to make the salt in the calcium pantothenate slurry entering therein be absorbed into the absorption liquid entering therein. The calcium pantothenate slurry impurity removal and desalination system 1 of the present invention removes sodium chloride by electrodialysis, has high processing efficiency and low energy consumption, reduces the salt content in the fresh water after electrodialysis treatment, improves the purity, and reduces the amount of wastewater discharged. Pure water is added to the absorption liquid collecting device 10, the fresh water collecting device 20, and the polar liquid circulation device 30, and respectively passes into the electrodialysis component 40, and the calcium pantothenate slurry impurity removal and desalination system 1 can be cleaned.

[0056] Specifically, the absorption liquid collecting device 10 includes an absorption liquid collecting tank 13 capable of accommodating absorption liquid, the absorption liquid collecting tank 13 having a first liquid inlet 14, a first liquid outlet 11 and a first reflux port 12, the first liquid inlet 14 is connected to the absorption liquid source, the first liquid inlet 14 is located at the top of the absorption liquid collecting tank 13, the first liquid outlet 11 is located at the bottom of the absorption liquid collecting tank 13, and the first reflux port 12 is located at the top of the absorption liquid collecting tank 13.

[0057] Correspondingly, the fresh water collecting device 20 includes a fresh water collecting tank 23 capable of accommodating fresh water, the fresh water collecting tank 23 having a second liquid inlet 24, a second liquid outlet 21 and a second reflux port 22, the second liquid inlet 24 is connected to a source of calcium pantothenate liquid, the second liquid inlet 24 is located at the top of the fresh water collecting tank 23, the second liquid outlet 21 is located at the bottom of the fresh water collecting tank 23, and the second reflux port 22 is located at the top of the fresh water collecting tank 23.

[0058] Similar to the absorption liquid collecting device 10 and the fresh water collecting device 20, the cathode liquid circulation device 30 includes an cathode liquid tank 33 capable of accommodating the cathode liquid. The cathode liquid tank 33 has a third liquid inlet 34, a third liquid outlet 31 and a third reflux port 32. The third liquid inlet 34 is connected to the cathode liquid source. The third liquid inlet 34 is located at the top of the cathode liquid tank 33, the third liquid outlet 31 is located at the bottom of the cathode liquid tank 33, and the third reflux port 32 is located at the bottom of the cathode liquid tank 33, so as to ensure the smooth output and reflux of the cathode liquid.

[0059] To facilitate liquid inlet, the electrodialysis component 40 has an absorption liquid inlet 41, an absorption liquid reflux port 42, a feed liquid inlet 43, a feed liquid reflux port 44, an extreme liquid inlet 45 and an extreme liquid reflux port 46. The first liquid outlet 11 is connected to the absorption liquid inlet 41, the absorption liquid reflux port 42 is connected to the first reflux port 12, the second liquid outlet 21 is connected to the feed liquid inlet 43, the feed liquid reflux port 44 is connected to the second reflux port 22, the third liquid outlet 31 is connected to the extreme liquid inlet 45, and the extreme liquid reflux port 46 is connected to the third reflux port 32.

[0060] Among them, the first liquid inlet 14 is connected to the absorption liquid source via the absorption liquid inlet pipe 15, the first liquid outlet 11 is connected to the absorption liquid inlet 41 via the absorption liquid outlet pipe 50, and the absorption liquid reflux port 42 is connected to the first reflux port 12 via the absorption liquid reflux pipe 60; the second liquid inlet 24 is connected to the calcium pantothenate liquid source via the liquid inlet pipe 25, the second liquid outlet 21 is connected to the liquid inlet 43 via the liquid outlet pipe 70, and the liquid reflux port 44 is connected to the second reflux port 22 via the liquid reflux pipe 80; the third liquid inlet 34 is connected to the polar liquid source via the polar liquid inlet pipe 35, the third liquid outlet 31 is connected to the polar liquid inlet 45 via the polar liquid outlet pipe 100, and the third reflux port 32 is connected to the polar liquid reflux port 46 via the polar liquid reflux pipe 110; it is convenient to transport the absorption liquid and provide convenience for the installation layout of the system.

[0061] In order to ensure the normal operation of the system and facilitate the control and monitoring of the operation of the system, a control valve 130 is provided on the absorption liquid inlet pipeline 15, the feed liquid inlet pipeline 25 and the pole liquid inlet pipeline 35; a control valve 130, a feed pump 140, a filter 90, a pressure sensor 160 and a temperature sensor 150 are provided on the absorption liquid outlet pipeline 50, the feed liquid outlet pipeline 70 and the pole liquid outlet pipeline 100; a temperature sensor 150 is provided on the absorption liquid reflux pipeline 60, the feed liquid reflux pipeline 80 and the pole liquid reflux pipeline 110.

[0062] The filtering accuracy of the filter 90 is 1 μm to 20 μm. In practical applications, the filter 90 can be a precision filter, such as a bag precision filter or a melt-cast precision filter.

[0063] It should also be noted that the calcium pantothenate slurry impurity removal and desalination system 1 of the present invention also includes a heat exchange mechanism 120, which is arranged on the absorption liquid reflux pipe 60. The heat exchange mechanism 120 can exchange heat with the absorption liquid in the absorption liquid reflux pipe 60 so that the temperature of the absorption liquid refluxed to the absorption liquid collection device 10 meets the system operation requirements, thereby ensuring the normal operation of the system.

[0064] In this specific embodiment, the temperature range of the absorption liquid returning to the absorption liquid collection device 10 is 30°C to 45°C. In practical applications, the temperature of the absorption liquid returning to the absorption liquid collection device 10 can be adjusted according to different processing conditions using the heat exchange mechanism 120 to improve the flexibility and adaptability of the system.

[0065] In order to facilitate the discharge of the absorption liquid in the absorption liquid collection device 10, the first liquid outlet 11 is also connected to the absorption liquid drainage pipe 16; correspondingly, the second liquid outlet 21 is connected to the fresh water drainage pipe 26 for discharging fresh water, which is convenient for discharging the calcium pantothenate slurry; the third liquid outlet 31 is connected to the polar liquid drainage pipe 36, which is convenient for discharging the polar liquid.

[0066] For the convenience of control, control valves 130 are provided on the absorption liquid discharge pipeline 16 , the fresh water discharge pipeline 26 and the polar liquid discharge pipeline 36 .

[0067] In other specific embodiments that can be realized by the present invention, in order to meet the processing requirements, the number of absorption liquid collecting tanks 13 can be multiple, and the absorption liquid collecting tanks 13 are arranged in parallel; accordingly, the number of fresh water collecting tanks 23 can be multiple, and the fresh water collecting tanks 23 are arranged in parallel. The number of absorption liquid collecting tanks 13 and fresh water collecting tanks 23 can be adjusted according to the processing requirements to meet different working conditions and improve the flexibility and adaptability of the system.

[0068] Embodiment 2

[0069] The present embodiment provides a method for removing impurities and desalting a calcium pantothenate slurry, using the calcium pantothenate slurry impurity removal desalting system 1 of the first embodiment, the absorption liquid collecting device 10 passes the absorption liquid into the electrodialysis component 40, the fresh water collecting device 20 passes the calcium pantothenate slurry into the electrodialysis component 40, and the polar liquid circulation device 30 passes the polar liquid into the electrodialysis component 40, the salt in the calcium pantothenate slurry is absorbed by the absorption liquid, and the impurities are filtered out, thereby achieving desalting and impurity removal.

[0070] Pure water is added to the absorption liquid collecting device 10, the fresh water collecting device 20, and the polar liquid circulation device 30, and respectively introduced into the electrodialysis assembly 40, so as to clean the calcium pantothenate slurry impurity removal and desalination system 1.

[0071] It is also necessary to explain that the working principle of the electrodialysis assembly 40 is a common method used by those skilled in the art and will not be described in detail here. In practical applications, the working temperature range of the electrodialysis assembly 40 is 25°C to 30°C, and more preferably the working temperature range is 26°C to 28°C.

[0072] The calcium pantothenate feed liquid is the calcium pantothenate fermentation liquid, which is mainly made of starch and other raw materials, and is extracted by biological fermentation with auxiliary materials such as liquid alkali and activated enzymes. The residue and other impurities in the calcium pantothenate ceramic membrane filtrate are removed by precision filtration, so that the effective ingredients enter the filtrate. After electrodialysis impurity removal and desalination, electrodialysis fresh water is obtained, and the electrodialysis membrane voltage is 1V.

[0073] In this specific embodiment, the electrodialysis used in the electrodialysis assembly 40 for impurity removal and desalination is a Tongzhou Zongheng special desalination membrane. The present invention selects an electrodialysis membrane stack with a suitable pore size to intercept calcium pantothenate, while other invalid ion components enter the concentrated water. After electrodialysis impurity removal and desalination, electrodialysis fresh water and electrodialysis concentrated water are obtained, and the ratio of the volume of the electrodialysis feed liquid to the volume of the electrodialysis concentrated water is 1:1. In practical applications, the electrodialysis concentrated water can be crystallized to facilitate subsequent treatment.

[0074] Embodiment 3

[0075] This embodiment provides a method for removing impurities and desalting a calcium pantothenate slurry, using the calcium pantothenate slurry removing impurities and desalting system 1 of the first embodiment, specifically comprising the following steps:

[0076] 1) Collect the calcium pantothenate ceramic membrane filtrate in the production process, and filter it through a ceramic membrane frame to obtain the calcium pantothenate ceramic membrane filtrate. The calcium pantothenate ceramic membrane filtrate has a salt content of about 3% and a feed liquid conductivity of 45ms / cm.

[0077] 2) The calcium pantothenate ceramic membrane filtrate obtained in step 1) is finely filtered (with a precision of 5 μm) to reduce its turbidity to zero and then enters the calcium pantothenate ceramic membrane filtrate feed buffer tank. After being pressurized to an inlet pressure of 0.1 MPa by a feed pump 140, it enters the electrodialysis component 40 for electrodialysis impurity removal and desalination. The temperature of the electrodialysis impurity removal and desalination operation is 25° C. When the volume conductivity of the feed liquid is less than 2.8 ms / cm, electrodialysis fresh water and electrodialysis concentrated water are obtained.

[0078] 3) The salt content of the electrodialysis fresh water obtained above is below 0.5%, and the conductivity is below 2.8 ms / cm.

[0079] The concentrated water from electrodialysis was used for subsequent crystallization and evaporation to extract salt; the fresh water from electrodialysis was used as feed for the subsequent process for further purification and crystallization, and the yield of calcium pantothenate was 92%.

[0080] The obtained electrodialysis flushing water wastewater enters the biochemical treatment system for treatment.

[0081] Embodiment 4

[0082] This embodiment provides a method for removing impurities and desalting a calcium pantothenate slurry, using the calcium pantothenate slurry removing impurities and desalting system 1 of the first embodiment, specifically comprising the following steps:

[0083] 4) Collect the calcium pantothenate ceramic membrane filtrate during the production process. The calcium pantothenate ceramic membrane filtrate has a salt content of about 3.5% and a feed liquid conductivity of 50ms / cm.

[0084] 5) The calcium pantothenate ceramic membrane filtrate obtained in step 4) is finely filtered (with a precision of 1 μm) to reduce its turbidity to zero and then enters the calcium pantothenate ceramic membrane filtrate feed buffer tank. After being conveyed by the feed pump 140 and pressurized to 0.1 MPa, it enters the electrodialysis component 40 for electrodialysis impurity removal and desalination. The temperature of the electrodialysis impurity removal and desalination operation is 26° C. When the volume conductivity of the feed liquid is less than 3 ms / cm, electrodialysis fresh water and electrodialysis concentrated water are obtained.

[0085] 6) The salt content of the electrodialysis fresh water obtained above is below 0.5%, and the conductivity is below 3 ms / cm.

[0086] The concentrated electrodialysis water is subsequently crystallized; the fresh electrodialysis water is sold as a product, and the yield of calcium pantothenate is 91.5%.

[0087] The obtained electrodialysis flushing water wastewater enters the biochemical treatment system for treatment.

[0088] Embodiment 5

[0089] This embodiment provides a method for removing impurities and desalting a calcium pantothenate slurry, using the calcium pantothenate slurry removing impurities and desalting system 1 of the first embodiment, specifically comprising the following steps:

[0090] 7) Collect the calcium pantothenate ceramic membrane filtrate in the production process. The salt content of the calcium pantothenate ceramic membrane filtrate is about 3.8%, and the conductivity of the feed liquid is about 52ms / cm.

[0091] 8) The calcium pantothenate ceramic membrane filtrate obtained in step 7) is finely filtered (with a precision of 5 μm) to reduce its turbidity to zero and then enters the calcium pantothenate ceramic membrane filtrate feed buffer tank. After being conveyed by the feed pump 140 and pressurized to 0.1 MPa, it enters the electrodialysis component 40 for electrodialysis impurity removal and desalination. The temperature of the electrodialysis impurity removal and desalination operation is 28° C. When the volume conductivity of the feed liquid is less than 3 ms / cm, electrodialysis fresh water and electrodialysis concentrated water are obtained.

[0092] 9) The salt content of the electrodialysis fresh water obtained above is below 0.5%, and the conductivity is below 3 ms / cm.

[0093] 10) The concentrated electrodialysis water is subsequently crystallized and evaporated to recover salt; the fresh electrodialysis water is sold as a product, and the yield of calcium pantothenate is more than 90%.

[0094] The obtained electrodialysis flushing water wastewater enters the biochemical treatment system for treatment.

[0095] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A calcium pantothenate liquid impurity removal and desalination system, characterized in that: include: An absorption liquid collecting device (10), wherein the absorption liquid collecting device (10) is used to store the absorption liquid; A fresh water collection device (20), the fresh water collection device (20) being capable of storing fresh water and being connected to a source of calcium pantothenate liquid; A polar liquid circulation device (30), wherein the polar liquid circulation device (30) is used to store polar liquid; The electrodialysis component (40), the absorption liquid collecting device (10), the fresh water collecting device (20) and the polar liquid circulation device (30) are all connected to the electrodialysis component (40) to realize the transportation of the absorption liquid, the calcium pantothenate feed liquid and the polar liquid to the electrodialysis component (40) for electrodialysis desalination and purification.

2. The calcium pantothenate liquid impurity removal and desalination system according to claim 1, characterized in that: The absorption liquid collecting device (10) comprises an absorption liquid collecting tank (13) capable of containing absorption liquid, the absorption liquid collecting tank (13) having a first liquid inlet (14), a first liquid outlet (11) and a first reflux port (12), the first liquid inlet (14) being connected to an absorption liquid source; The fresh water collection device (20) comprises a fresh water collection tank (23) capable of containing fresh water, wherein the fresh water collection tank (23) has a second liquid inlet (24), a second liquid outlet (21) and a second reflux port (22), wherein the second liquid inlet (24) is connected to a source of calcium pantothenate liquid; The cathode liquid circulation device (30) comprises an cathode liquid tank (33) capable of containing the cathode liquid, the cathode liquid tank (33) having a third liquid inlet (34), a third liquid outlet (31) and a third reflux port (32), and the third liquid inlet (34) is connected to a cathode liquid source; The electrodialysis component (40) has an absorption liquid inlet (41), an absorption liquid reflux port (42), a feed liquid inlet (43), a feed liquid reflux port (44), an extreme liquid inlet (45) and an extreme liquid reflux port (46); the first liquid outlet (11) is connected to the absorption liquid inlet (41); the absorption liquid reflux port (42) is connected to the first reflux port (12); the second liquid outlet (21) is connected to the feed liquid inlet (43); the feed liquid reflux port (44) is connected to the second reflux port (22); the third liquid outlet (31) is connected to the extreme liquid inlet (45); and the extreme liquid reflux port (46) is connected to the third reflux port (32).

3. The calcium pantothenate liquid impurity removal and desalination system according to claim 2, characterized in that: The first liquid inlet (14) is connected to the absorption liquid source via an absorption liquid inlet pipe (15), the first liquid outlet (11) is connected to the absorption liquid inlet (41) via an absorption liquid outlet pipe (50), and the absorption liquid reflux port (42) is connected to the first reflux port (12) via an absorption liquid reflux pipe (60); The second liquid inlet (24) is connected to a source of calcium pantothenate liquid via a liquid inlet pipeline (25), the second liquid outlet (21) is connected to the liquid inlet (43) via a liquid outlet pipeline (70), and the liquid reflux port (44) is connected to the second reflux port (22) via a liquid reflux pipeline (80); The third liquid inlet (34) is connected to the cathode liquid source via the cathode liquid inlet pipeline (35), the third liquid outlet (31) is connected to the cathode liquid inlet (45) via the cathode liquid outlet pipeline (100), and the third reflux port (32) is connected to the cathode liquid reflux port (46) via the cathode liquid reflux pipeline (110).

4. The calcium pantothenate liquid impurity removal and desalination system according to claim 3, characterized in that: The absorption liquid inlet pipeline (15), the feed liquid inlet pipeline (25) and the polar liquid inlet pipeline (35) are all provided with a control valve (130); the absorption liquid outlet pipeline (50), the feed liquid outlet pipeline (70) and the polar liquid outlet pipeline (100) are all provided with a control valve (130), a feed pump (140), a filter (90), a pressure sensor (160) and a temperature sensor (150); the absorption liquid reflux pipeline (60), the feed liquid reflux pipeline (80) and the polar liquid reflux pipeline (110) are all provided with a temperature sensor (150); the filtration accuracy of the filter (90) is 1 μm to 20 μm.

5. The calcium pantothenate liquid impurity removal and desalination system according to claim 3, characterized in that: It also comprises a heat exchange mechanism (120), wherein the heat exchange mechanism (120) is arranged on the absorption liquid reflux pipeline (60), and the heat exchange mechanism (120) is capable of exchanging heat with the absorption liquid in the absorption liquid reflux pipeline (60).

6. The calcium pantothenate liquid impurity removal and desalination system according to claim 5, characterized in that: The temperature of the absorption liquid flowing back to the absorption liquid collecting device (10) is in the range of 30°C to 45°C.

7. The calcium pantothenate liquid impurity removal and desalination system according to claim 2, characterized in that: The first liquid outlet (11) is also connected to an absorption liquid drainage pipeline (16); the second liquid outlet (21) is connected to a fresh water drainage pipeline (26) for discharging fresh water; and the third liquid outlet (31) is connected to an extreme liquid drainage pipeline (36); The absorption liquid discharge pipeline (16), the fresh water discharge pipeline (26) and the polar liquid discharge pipeline (36) are all provided with control valves (130).

8. The calcium pantothenate liquid impurity removal and desalination system according to claim 2, characterized in that: The number of the absorption liquid collecting tanks (13) is multiple, and the absorption liquid collecting tanks (13) are arranged in parallel; the number of the fresh water collecting tanks (23) is multiple, and the fresh water collecting tanks (23) are arranged in parallel.

9. A method for removing impurities and desalting calcium pantothenate liquid, characterized in that: By using the calcium pantothenate slurry impurity removal and desalination system according to any one of claims 1 to 8, the absorption liquid collecting device (10) passes the absorption liquid into the electrodialysis component (40), the fresh water collecting device (20) passes the calcium pantothenate slurry into the electrodialysis component (40), and the polar liquid circulation device (30) passes the polar liquid into the electrodialysis component (40), the salt in the calcium pantothenate slurry is absorbed by the absorption liquid, and the impurities are filtered out, thereby achieving desalination and impurity removal.

10. The method for removing impurities and desalting calcium pantothenate solution according to claim 9, characterized in that: The operating temperature range of the electrodialysis assembly (40) is 25°C to 30°C.

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