Solvent separation and recovery device

Abstract

The utility model provides a solvent separation and recovery device. The solvent separation and recovery device comprises a cleaning mechanism, a liquid pumping mechanism, a distillation mechanism and a recovery mechanism, a cleaning stock solution is arranged in the cleaning mechanism; the liquid pumping mechanism comprises a liquid pump part and a liquid pumping pipeline part communicated with the liquid pump part, and one end of the liquid pumping pipeline part is communicated with the cleaning mechanism; the distillation mechanism is provided with a distillation working bin, and the other end of the liquid pumping pipeline piece is communicated with the distillation working bin; the recycling mechanism comprises a recycling pipeline part and a recycling part, one end of the recycling pipeline part is communicated with the top end of the distillation working bin, and the other end of the recycling pipeline part is communicated with the recycling part. Through the arrangement of the distillation mechanism, the cleaning solution in the cleaning stock solution is vaporized and recovered in the recovery part through the recovery pipeline part, and the solvent is retained in the distillation working bin, so that the cleaning solution and the solvent are separated, the cleaning stock solution treatment efficiency is improved, the treatment period is shortened, and the cost is reduced. And the solvent in the distillation working bin is recycled and taken out for recycling, so that the waste of the solvent is avoided, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of polymer material production equipment, and specifically, to a solvent separation and recovery device. Background Art

[0002] In the process of extracting natural polymer materials (such as cellulose, chitin, etc.), it is necessary to use a solvent to treat the polymer materials, and then use a cleaning solution to clean the natural polymer materials to remove the solvent. Therefore, cleaning wastewater will be generated after cleaning.

[0003] Currently, common solvents include acid-base solvents and deep eutectic solvents. If acid-base solvents are used for extraction, in addition to using a large amount of cleaning solution to clean the natural polymer materials to adjust the pH to neutral, the cleaning wastewater generated after cleaning will be acidic or alkaline and cannot be directly discharged. The acidic or alkaline cleaning wastewater needs to be strictly treated before discharge, increasing the production cost. If deep eutectic solvents such as ionic liquids are used for extraction, although acidic or alkaline cleaning wastewater will not be generated in the subsequent cleaning process, eliminating the process of treating acidic or alkaline cleaning wastewater later, the price of ionic liquids is relatively high, and deep eutectic solvents such as ionic liquids are all dissolved in the cleaning wastewater. Directly discharging the cleaning wastewater will cause a large amount of waste of ionic liquids, increasing the extraction cost. No matter which of the above solvents is used, the existing natural polymer extraction equipment cannot effectively treat the cleaning wastewater. The treatment cycle of the cleaning wastewater is long, the efficiency is low, the cost is high, and the solvent in the cleaning wastewater cannot be effectively recovered and reused. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the present application provides a solvent separation and recovery device.

[0005] A solvent separation and recovery device disclosed in the present application includes: a cleaning mechanism, a liquid pumping mechanism, a distillation mechanism, and a recovery mechanism; the cleaning mechanism contains cleaning stock solution; the liquid pumping mechanism includes a liquid pump member and a liquid pumping pipeline member communicated with the liquid pump member, and one end of the liquid pumping pipeline member is communicated with the cleaning mechanism; the distillation mechanism has a distillation working chamber, and the other end of the liquid pumping pipeline member is communicated with the distillation working chamber; the recovery mechanism includes a recovery pipeline member and a recovery member, one end of the recovery pipeline member is communicated with the top of the distillation working chamber, and the other end of the recovery pipeline member is communicated with the recovery member; the liquid pump member sucks the cleaning stock solution in the cleaning mechanism into the distillation working chamber through the liquid pumping pipeline member, the distillation working chamber distills the cleaning stock solution to obtain distillation cleaning gas and solvent, the distillation cleaning gas is recovered in the recovery member through the recovery pipeline member to obtain a cleaning solution, and the solvent is separated and remains in the distillation working chamber.

[0006] Preferably, the recovery pipe component includes a condensation pipe and a condenser, the condenser is arranged in the condensation pipe, one end of the condensation pipe is connected to the top of the distillation working chamber, and the other end of the condensation pipe is connected to the recovery component.

[0007] Preferably, the recovery pipeline also includes a one-way valve, which is arranged at one end of the condensation pipeline.

[0008] Preferably, the solvent separation and recovery device further comprises a vacuum mechanism, which is connected to the recovery component, and acts on the recovery component and evacuates the recovery component and the distillation working chamber.

[0009] Preferably, a buffer baffle is provided at the working end of the vacuum mechanism.

[0010] Preferably, the solvent separation and recovery device also includes a transfer mechanism, which includes a transfer component and a transfer pipe component, the transfer component is connected to the other end of the liquid pumping pipe component, and the two ends of the transfer pipe component are respectively connected to the distillation working chamber and the transfer component; the liquid pump component draws the cleaning stock liquid from the cleaning mechanism to the transfer component for transfer and storage, and draws the cleaning stock liquid in the transfer component into the distillation working chamber through the transfer pipe component.

[0011] Preferably, the solvent separation and recovery device also includes a solvent recovery mechanism, which includes a solvent pipeline and a solvent recovery component. The two ends of the solvent pipeline are respectively connected to the distillation working chamber and the solvent recovery component, and the solvent recovery component receives the solvent retained in the distillation working chamber.

[0012] Preferably, the solvent separation and recovery device further comprises a control console, which is electrically connected to the cleaning mechanism, the liquid pump component, the distillation mechanism and the recovery pipeline component respectively.

[0013] Preferably, the cleaning mechanism comprises a cleaning body and a cleaning carrier, the cleaning body is filled with cleaning liquid, the cleaning carrier is movably arranged above the cleaning body and can drive the objects to be cleaned on the cleaning carrier to extend into or out of the cleaning liquid.

[0014] Preferably, the cleaning mechanism also includes a circulation part, which includes a circulation drive body, a circulation pipe and a filter. The driving end of the circulation drive body is arranged in the circulation pipe, the circulation pipe is connected to the cleaning main part, and the filter is arranged in the circulation pipe; the circulation drive body acts on the cleaning liquid in the circulation pipe, so that the cleaning liquid circulates.

[0015] The beneficial effects of the present application are as follows: Through the setting of the cleaning mechanism, the polymer substances can be cleaned in the cleaning mechanism to remove the solvent, and the solvent is dissolved in the cleaning liquid to form the cleaning stock solution. Through the setting of the distillation mechanism, the cleaning stock solution can be distilled, the cleaning liquid in the cleaning stock solution is vaporized and recovered into the recovery part through the recovery pipeline component. Since the boiling point of the solvent is much higher than that of the cleaning liquid, the solvent does not vaporize or only vaporizes slightly, and the solvent is retained in the distillation working chamber. In this way, the separation of the cleaning liquid and the solvent can be achieved, the efficiency of the cleaning stock solution treatment is improved, the treatment cycle of the cleaning stock solution is shortened, and then the solvent in the distillation working chamber is recovered and taken out for recycling, avoiding the waste of the solvent and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation to the present application. In the drawings:

[0017] Figure 1 is a schematic structural diagram of the solvent separation and recovery device in the embodiment;

[0018] Figure 2 is a schematic structural diagram of the cleaning mechanism in the embodiment.

[0019] Reference numerals:

[0020] 1. Cleaning mechanism; 11. Cleaning main body part; 111. Cleaning pool; 112. Cleaning cover; 113. Positive and negative electrode plates; 12. Cleaning carrier part; 13. Circulation part; 131. Circulation driving body; 132. Circulation pipeline; 133. Filter; 2. Liquid pumping mechanism; 21. Liquid pump part; 22. Liquid pumping pipeline component; 3. Distillation mechanism; 31. Distillation reactor; 32. Heating device; 4. Recovery mechanism; 41. Recovery pipeline component; 411. Condensation pipeline; 412. Check valve; 42. Recovery part; 5. Vacuum mechanism; 51. Buffer baffle; 6. Transfer mechanism; 61. Transfer part; 62. Transfer pipeline component; 621. Transfer pipeline; 622. Transfer pump; 7. Solvent recovery mechanism; 71. Solvent pipeline component; 72. Solvent recovery part; 8. Console. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will disclose multiple embodiments of the present application with diagrams. For the sake of clarity, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present application. That is to say, in some embodiments of the present application, these practical details are not necessary. In addition, for the purpose of simplifying the diagrams, some conventional structures and components will be shown in a simple schematic manner in the diagrams.

[0022] It should be noted that all directional indications in the embodiments of the present application, such as up, down, left, right, front, back... are only used to explain the relative positional relationship and movement conditions between components in a specific posture as shown in the drawings. If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, in the present application, descriptions such as "first" and "second" are only for descriptive purposes, and do not particularly refer to the order or sequence. Nor are they used to limit the present application. They are only used to distinguish components or operations described with the same technical terms, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0024] In order to further understand the content, features and effects of the present application, the following embodiments are exemplified and described in detail with reference to the drawings as follows.

[0025] Refer to Figure 1 , Figure 1 , which is a schematic structural diagram of the solvent separation and recovery device in the embodiment. The solvent separation and recovery device in this embodiment includes a cleaning mechanism 1, a liquid pumping mechanism 2, a distillation mechanism 3 and a recovery mechanism 4. The cleaning mechanism 1 contains the cleaning stock solution. The liquid pumping mechanism 2 includes a liquid pump member 21 and a liquid pumping pipeline member 22 communicating with the liquid pump member 21. One end of the liquid pumping pipeline member 22 is communicated with the cleaning mechanism 1. The distillation mechanism 3 has a distillation working chamber, and the other end of the liquid pumping pipeline member 22 is communicated with the distillation working chamber. The recovery mechanism 4 includes a recovery pipeline member 41 and a recovery member 42. One end of the recovery pipeline member 41 is communicated with the top of the distillation working chamber, and the other end of the recovery pipeline member 41 is communicated with the recovery member 42. The liquid pump member 21 pumps the cleaning stock solution in the cleaning mechanism 1 into the distillation working chamber through the liquid pumping pipeline member 22. The distillation working chamber distills the cleaning stock solution to obtain distillation cleaning gas and solvent. The distillation cleaning gas is recovered in the recovery member 42 through the recovery pipeline member 41 to obtain the cleaning liquid, and the solvent is separated and retained in the distillation working chamber.

[0026] The solvent separation and recovery device in this embodiment is applied to the preparation of natural macromolecular substances (such as cellulose, chitin, etc.). When extracting natural macromolecular substances, eutectic solvents such as acid-base solvents or ionic liquids are required, resulting in the dissolution of natural macromolecular substances in the solvent. For the convenience of description, this embodiment collectively refers to acid-base solvents or ionic liquids and other eutectic solvents as solvents. Through the setting of the cleaning mechanism 1, the natural macromolecular substances can be placed in the cleaning liquid of the cleaning mechanism 1 for cleaning, so that the solvent dissolves in the cleaning liquid to achieve the effect of separating the natural macromolecular substances from the solvent. In this embodiment, the cleaning liquid is pure water, and the original cleaning liquid is the cleaning liquid dissolved with the solvent. That is to say, the cleaning mechanism 1 originally contains the cleaning liquid, and after cleaning, the solvent dissolves in the cleaning liquid to form the original cleaning liquid. Both the cleaning mechanism 1 and the liquid extraction pipeline 22 contain the original cleaning liquid. The liquid pump 21 sucks the original cleaning liquid in the liquid extraction pipeline 22, so as to suck the original cleaning liquid in the cleaning mechanism 1 into the distillation working chamber for distillation. Through the distillation of the distillation mechanism 3, the cleaning liquid in the original cleaning liquid is heated and distilled into a gas state and is recovered in the recovery member 42 after passing through the recovery pipeline 41. Since the boiling point of the solvent is much higher than that of the cleaning liquid, the solvent dissolved in the cleaning liquid does not distill into a gas state, so the solvent remains in the distillation working chamber. In this way, the cleaning liquid and the solvent can be separated, and the cleaning liquid is recovered through the recovery member 42. For the solvent retained in the distillation working chamber, it can be taken out of the distillation working chamber for recycling. In this way, through the setting of the distillation mechanism 3, the original cleaning liquid can be distilled, the cleaning liquid in the original cleaning liquid is vaporized and recovered in the recovery member 42 through the recovery pipeline 41. Since the boiling point of the solvent is much higher than that of the cleaning liquid, the solvent does not vaporize or only vaporizes slightly, and the solvent is retained in the distillation working chamber. In this way, the separation of the cleaning liquid and the solvent can be realized, the efficiency of the original cleaning liquid treatment is improved, the treatment cycle of the original cleaning liquid is shortened, and then the solvent in the distillation working chamber can be recovered and taken out for recycling, avoiding the waste of the solvent and reducing the production cost.

[0027] Refer to Figure 2 , Figure 2It is a structural diagram of the cleaning mechanism in the embodiment. Preferably, the cleaning mechanism 1 includes a cleaning body 11 and a cleaning carrier 12. Cleaning liquid is added to the cleaning body 11. The cleaning carrier 12 is movably arranged above the cleaning body 11 and can drive the objects to be cleaned on the cleaning carrier 12 to extend into or out of the cleaning liquid. In specific applications, the cleaning body 11 includes a cleaning tank 111, a cleaning cover 112 and positive and negative electrode plates 113. The cleaning tank 111 carries cleaning liquid. The cleaning cover 112 is located above the cleaning tank 111. The positive and negative electrode plates 113 are both extended into the cleaning liquid and are respectively close to the two sides of the cleaning tank 111. It can be understood that the cleaning body 11 is equivalent to an electro-osmosis cleaning tank. The cleaning carrier 12 is an electrically controlled telescopic device, one end of which is arranged on the cleaning cover 112, and the other end is a movable end, which can be extended into or away from the cleaning liquid of the cleaning tank 111, and the other end is also a bearing end, that is, the other end of the cleaning carrier 12 carries a dialysis bag, and the polymer is loaded in the dialysis bag. The cleaning carrier 12 drives the other end to descend and drives the dialysis bag and the polymer to extend into the cleaning liquid for cleaning, so that the polymer can be completely immersed in the cleaning liquid, thereby separating the polymer and the solvent, and making the solvent dissolved in the cleaning liquid, improving the solvent cleaning effect. The cleaning carrier 12 drives the other end to rise away from the cleaning liquid, at which time the polymer can be taken out of the dialysis bag or loaded into the polymer to be cleaned. The electroosmosis method makes it easier for the solvent to pass through the dialysis bag and move toward the electrode plate, that is, to improve the separation ability of the solvent and the polymer, so that the polymer and the solvent can be completely separated without using a large amount of cleaning liquid, saving the cost of the cleaning liquid.

[0028] Re-reference Figure 2 Preferably, the cleaning mechanism 1 also includes a circulation part 13, and the circulation part 13 includes a circulation drive body 131 and a circulation pipeline 132. The driving end of the circulation drive body 131 is arranged in the circulation pipeline 132, and the circulation pipeline 132 is connected to the cleaning main body 11. The circulation drive body 131 acts on the cleaning liquid in the circulation pipeline 132, so that the cleaning liquid circulates. Through the arrangement of the circulation drive body 131 and the circulation pipeline 132, the cleaning main body 11, that is, the cleaning liquid in the cleaning tank 111 can maintain a circulating state, so that the cleaning liquid can continuously flush the polymer substance in the dialysis bag, so that the polymer substance and the cleaning liquid can fully contact, which is more conducive to the separation of the polymer substance and the solvent, and improves the cleaning effect. Specifically, the circulation drive body 131 is an electric pump. Furthermore, a temperature control device is also provided in the cleaning tank 111, and the temperature control device is used to heat up and cool down the cleaning liquid in the cleaning tank 111, and the cleaning effect of the solvent is further promoted by controlling the cleaning liquid at a suitable temperature.

[0029] Re-reference Figure 2, preferably, the circulation member 13 further includes a filter 133 disposed in the circulation pipeline 132. By providing the filter 133, when the dialysis bag accidentally ruptures, impurities such as natural macromolecular substances and broken pieces of the dialysis bag will enter the cleaning liquid, and the filter 133 can block the above-mentioned impurities when the cleaning liquid circulates, preventing the impurities from circulating back into the cleaning tank 111 and affecting the cleaning effect.

[0030] Refer back to Figure 2 , preferably, the cleaning mechanism 1 further includes a cleaning liquid detection member electrically connected to the liquid extraction member 22. The detection end of the cleaning liquid detection member is disposed in the circulation pipeline 132 to detect the parameters of the cleaning liquid in the circulation pipeline 132 and control the opening or closing of the liquid pump member 21. In specific applications, the cleaning liquid detection member is an existing liquid parameter measurement and monitoring device, and its main function is to measure and monitor the cleaning stock solution in the cleaning mechanism 1, including measuring and monitoring a series of parameters such as the pH value and conductivity of the cleaning liquid, so as to judge whether the solvent content in the cleaning stock solution is saturated. That is to say, when it is measured and monitored that the solvent content in the cleaning stock solution is close to or reaches saturation, at this time, the cleaning liquid detection member can control the liquid pump member 21 to open, so as to suck the saturated cleaning stock solution into the distillation mechanism 3 for distillation, and separate the cleaning liquid and the solvent in the saturated cleaning stock solution by distillation, which is convenient for subsequent recycling of the separated cleaning liquid and solvent. By providing the cleaning liquid detection member, it is possible to timely understand whether the cleaning stock solution reaches the saturation state, and when it reaches saturation, it can timely control the liquid pump member 21 to open so that the cleaning stock solution enters the distillation mechanism 3 for distillation separation, avoiding the unsatisfactory cleaning effect of the solvent caused by the saturated cleaning stock solution. Specifically, the cleaning liquid detection member is electrically connected to the central control device, and the liquid pump member 21 is also electrically connected to the central control device. The central control device is an existing production process control host, the liquid pump member 21 is a liquid extraction pump, the liquid extraction pipeline member 22 is a liquid extraction pipeline, and a stop valve is also provided in the liquid extraction pipeline to cooperate with the liquid pump member 21 for the suction work. A stop valve is also provided in the circulation pipeline 132. When the liquid pump member 21 sucks the cleaning liquid in the cleaning tank 111 into the distillation mechanism 3, the circulation driving body 131 is closed, and the stop valve in the circulation pipeline 132 is also closed synchronously, so that the cleaning liquid in the cleaning tank 111 stops circulating.

[0031] Refer back to Figure 1, preferably, the distillation mechanism 3 includes a distillation reactor 31 and a heating device 32. The distillation working chamber is located inside the distillation reactor 31, and the distillation reactor 31 is arranged on the heating device 32. In this embodiment, the heating device 32 includes a heating table, an electric control heater, heat-conducting oil, and a heater. The heating table contains heat-conducting oil, and the heater is arranged inside the heating table to heat the heat-conducting oil. The electric control heater is electrically connected to the heater, and one end of the electric control heater is connected with a temperature transmitter and extends into the heat-conducting oil. The distillation reactor 31 is placed in the heat-conducting oil for heating, so as to heat and distill the cleaning liquid in the distillation working chamber. The electric control heater measures the temperature of the heat-conducting oil to control the operation and stop of the heater, realizing temperature control operation to ensure the accuracy of the temperature inside the distillation reactor 31. Further, a temperature detector, a pressure detector, and a liquid level gauge are also arranged inside the distillation reactor 31, and they are all electrically connected to the central control device. The temperature detector mainly measures the temperature of the liquid in the distillation reactor 31 and transmits the data to the central control device in real time. The pressure detector is used to measure the pressure condition in the distillation reactor 31, and the liquid level gauge measures the liquid level condition of the liquid in the distillation reactor 31. The central control device is also connected with a digital display screen, which mainly monitors and displays in real time the relevant state parameters such as the liquid level of the liquid in the distillation reactor 31, the temperature inside the distillation reactor 31, and the pressure.

[0032] Refer back to Figure 1 , preferably, the recovery pipeline component 41 includes a condensation pipeline 411 and a condenser. The condenser is arranged on the condensation pipeline 411. One end of the condensation pipeline 411 is communicated with the top end of the distillation working chamber, and the other end of the condensation pipeline 411 is communicated with the recovery component 42. In specific application, when heating and distilling the cleaning stock solution in the distillation working chamber, the cleaning liquid in the cleaning stock solution is heated and vaporized and rises into the condensation pipeline 411. Through the cooling effect of the condenser, the vaporized cleaning liquid will be liquefied again. Since the condensation pipeline 411 is inclined, specifically, the end connected to the distillation reactor 31 is higher in height than the end connected to the recovery component 42, the liquefied cleaning liquid flows into the recovery component 42 through the condensation pipeline 411 under the action of gravity.

[0033] Refer back to Figure 1, Preferably, the recovery pipeline component 41 further includes a one-way valve 412, and the one-way valve 412 is provided at one end of the condensation pipeline 411. In specific applications, the one-way valve 412 in this embodiment is an electrically controlled one-way valve, and the valve can only open upward unidirectionally. That is to say, through the setting of the one-way valve 412, the liquefied cleaning liquid can only flow from the distillation reactor 31 to the condensation pipeline 411, and cannot flow from the condensation pipeline 411 to the distillation reactor 31. In this way, when the cleaning liquid in the recovery component 42 is full and there is a phenomenon of backflow into the distillation reactor 31, the one-way valve 412 will automatically fall and close under the impact of the liquid, preventing the liquid from backflowing and polluting the purity of the solvent in the distillation reactor 31 or affecting the distillation operation. In addition, the one-way valve 412 is also provided with an external ventilation hole, through which pressure can be relieved or air can be introduced in case of emergency to balance the pressure inside and outside the distillation reactor 31 in a timely manner.

[0034] Refer back to Figure 1 , Preferably, the solvent separation and recovery device further includes a vacuum mechanism 5. The vacuum mechanism 5 is connected to the recovery component 42, and the vacuum mechanism 5 acts on the recovery component 42 and evacuates the recovery component 42 and the distillation working chamber. In specific applications, the vacuum mechanism 5 is a vacuum pump, and the recovery component 42 is a recovery tank. The vacuum mechanism 5 can evacuate the recovery component 42 and the distillation reactor 31, thereby adjusting the air pressure inside the recovery component 42 and the distillation reactor 31. That is to say, through the setting of the vacuum mechanism 5, the pressure inside the distillation reactor 31 can be adjusted, which means that the entire distillation and recovery process of the distillation reactor 31 can achieve two forms: conventional distillation and vacuum distillation. Among them, under the action of the vacuum mechanism 5, vacuum distillation can achieve a negative pressure (100 - 1000 Pa) in the system. In actual production, according to different working conditions and conditions, vacuum distillation can be selected to reduce the boiling point of the cleaning liquid, thereby improving the distillation efficiency and production efficiency, and at the same time avoiding the influence of too high heating temperature on the original properties of the solvent. Further, a temperature detector is also provided in the condensation pipeline 411 to monitor the temperature of the vaporized cleaning liquid in the condensation pipeline 411, to avoid the temperature of the vaporized cleaning liquid being too high. If the temperature is too high, the pressure of the distillation reactor 31 needs to be reduced correspondingly through the vacuum mechanism 5 to reduce the boiling point of the cleaning liquid and the temperature of the vaporized cleaning liquid, so as to control the safe and stable operation of the entire vacuum distillation process.

[0035] Refer back to Figure 1, preferably, a temperature detector and a liquid level gauge are provided inside the recovery part 42. The temperature detector is used to measure the temperature of the recovered cleaning liquid in the recovery tank. The liquid level gauge facilitates clearly understanding the liquid volume in the recovery tank and preventing the problem of liquid overflow. In specific applications, a buffer baffle 51 is provided at the working end of the vacuum pump to prevent the cleaning liquid from being sucked into the vacuum pump under negative pressure, affecting the distillation recovery process, ensuring the safety of the process, and preventing the volatile solvent from entering the vacuum pump. Further, a discharge valve is provided at the bottom of the recovery tank, and a feed valve is provided in the cleaning tank 111. The discharge valve and the feed valve are connected through a feeding pipeline, and a driving pump is provided in the feeding pipeline to directly suck the cleaning liquid in the recovery tank into the cleaning tank 111, realizing the automatic recovery and reuse of the cleaning liquid.

[0036] Refer back to Figure 1 , preferably, the solvent separation and recovery device further includes a transfer mechanism 6. The transfer mechanism 6 includes a transfer part 61 and a transfer pipeline part 62. The transfer part 61 is connected to the other end of the liquid extraction pipeline part 22, and the two ends of the transfer pipeline part 62 are respectively connected to the distillation working chamber and the transfer part 61. The liquid pump part 21 sucks the original cleaning liquid from the cleaning mechanism 1 into the transfer part 61 for transfer and storage, and sucks the original cleaning liquid in the transfer part 61 into the distillation working chamber through the transfer pipeline part 62. In specific applications, the transfer part 61 is a liquid storage tank, inside which a temperature detector is provided to record the temperature of the solution in the tank body. At the same time, a digital display screen is also provided, and the digital display screen is electrically connected to the temperature detector and the central control device respectively. The transfer pipeline part 62 includes a transfer pipeline 621 and a transfer suction pump 622 connected to the transfer pipeline. The two ends of the transfer pipeline 621 are respectively connected to the distillation working chamber and the transfer part 61, and a stop valve is also provided in the transfer pipeline 621. Through the setting of the transfer mechanism 6, when the relevant parameters of the original cleaning liquid in the cleaning mechanism 1 reach the preset threshold value, that is, when it reaches or is close to the saturated state, the stop valve and the liquid pump part 21 on the liquid extraction pipeline part 22 will open, sucking the original cleaning liquid in the cleaning mechanism 1 into the liquid storage tank for transfer. At this time, the solvent concentration in the original cleaning liquid is relatively high. Then, the stop valve and the transfer suction pump 622 on the transfer pipeline 621 will open, sucking the original cleaning liquid in the liquid storage tank into the distillation working chamber for heating and distillation. Of course, during the suction process, the circulation driving body 131 is closed, and the stop valve in the circulation pipeline 132 is also closed synchronously, so that the cleaning liquid in the cleaning tank 111 stops circulating.

[0037] Refer back to Figure 1, preferably, the solvent separation and recovery device further includes a solvent recovery mechanism 7. The solvent recovery mechanism 7 includes a solvent pipeline component 71 and a solvent recovery component 72. The two ends of the solvent pipeline component 71 are respectively connected to the distillation working chamber and the solvent recovery component 72, and the solvent recovery component 72 receives the solvent remaining in the distillation working chamber. In specific applications, the solvent recovery component 72 is a concentrated liquid storage tank. The structure of the solvent pipeline component 71 is similar to that of the liquid extraction mechanism 2, including a solvent pipeline and a liquid extraction pump, which will not be elaborated here. The concentrated liquid storage tank is used to store the solvent distilled and concentrated by the distillation reaction kettle 31. This solvent can continue to be used in the extraction process of natural polymers, thereby realizing the recycling of the solvent, avoiding waste of the solvent, and reducing production costs. Similarly, the concentrated liquid storage tank is still equipped with devices such as a digital display screen to monitor the relevant parameters of the liquid in the pipe, ensuring the safe and stable operation of the process and equipment.

[0038] It should be particularly noted that the solvent separation and recovery device further includes a control console 8, and the control console 8 is electrically connected to the cleaning mechanism 1, the liquid pump component 21, the distillation mechanism 3, and the recovery pipeline component 41 respectively. In specific applications, the control console 8 is a central control device. In this embodiment, the vacuum mechanism 5, the circulation drive body 131, the one-way valve 412, the cleaning liquid detector, the electric heating device, and all liquid extraction pumps, temperature detectors, digital display screens, stop valves, etc. are electrically connected to the central control device, facilitating the operator to grasp the relevant parameters and operating status of each process in real time, and can control each step of the entire process through it to ensure the safe and stable operation of the process and the normal operation of the equipment.

[0039] In summary, through the setting of the cleaning mechanism 1, the natural polymer can be placed in the cleaning liquid of the cleaning mechanism 1 for cleaning, so that the solvent dissolves in the cleaning liquid to achieve the effect of separating the natural polymer and the solvent. In this embodiment, the cleaning liquid is pure water, and the original cleaning liquid is an aqueous solution dissolved with the solvent. Both the cleaning mechanism 1 and the liquid extraction pipeline component 22 contain the original cleaning liquid. The liquid pump component 21 sucks the original cleaning liquid in the liquid extraction pipeline component 22, thereby sucking the original cleaning liquid in the cleaning mechanism 1 into the distillation working chamber for distillation. Through the distillation of the distillation mechanism 3, the cleaning liquid in the original cleaning liquid is heated and distilled into a gas state and is recovered in the recovery component 42 after passing through the recovery pipeline component 41. Since the boiling point of the solvent is much higher than that of the cleaning liquid, the solvent dissolved in the cleaning liquid does not distill into a gas state, so the solvent remains in the distillation working chamber. In this way, the cleaning liquid and the solvent can be separated, and the cleaning liquid can be recovered through the recovery component 42. For the solvent retained in the distillation working chamber, it can be taken out of the distillation working chamber for recycling. In this way, through the setting of the distillation mechanism 3, the original cleaning liquid can be distilled, the cleaning liquid in the original cleaning liquid is vaporized and recovered in the recovery component 42 through the recovery pipeline component 41. Since the boiling point of the solvent is much higher than that of the cleaning liquid, the solvent does not vaporize or only vaporizes slightly, and the solvent is retained in the distillation working chamber. In this way, the separation of the cleaning liquid and the solvent can be realized, the efficiency of the original cleaning liquid treatment is improved, the treatment cycle of the original cleaning liquid is shortened, and then the solvent in the distillation working chamber can be recovered and taken out for recycling, avoiding the waste of the solvent and reducing the production cost.

[0040] The above are only the implementation manners of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A solvent separation and recovery device, characterized in that: include: A cleaning mechanism (1) having a cleaning stock solution therein; A liquid pumping mechanism (2), comprising a liquid pump component (21) and a liquid pumping pipeline component (22) connected to the liquid pump component (21), wherein one end of the liquid pumping pipeline component (22) is connected to the cleaning mechanism (1); A distillation mechanism (3) having a distillation working chamber, the other end of the liquid extraction pipeline (22) being in communication with the distillation working chamber; and A recovery mechanism (4), comprising a recovery pipe member (41) and a recovery member (42), wherein one end of the recovery pipe member (41) is connected to the top end of the distillation working chamber, and the other end of the recovery pipe member (41) is connected to the recovery member (42); The liquid pump component (21) pumps the cleaning stock liquid in the cleaning mechanism (1) into the distillation working chamber through the liquid pumping pipe component (22). The distillation working chamber distills the cleaning stock liquid and obtains distilled cleaning gas and solvent. The distilled cleaning gas is recovered in the recovery component (42) through the recovery pipe component (41) to obtain the cleaning liquid. The solvent is separated and retained in the distillation working chamber.

2. The solvent separation and recovery device according to claim 1, characterized in that: The recovery pipe component (41) includes a condensation pipe (411) and a condenser, wherein the condenser is arranged on the condensation pipe (411), one end of the condensation pipe (411) is connected to the top end of the distillation working chamber, and the other end of the condensation pipe (411) is connected to the recovery component (42).

3. The solvent separation and recovery device according to claim 2, characterized in that: The recovery pipe member (41) further comprises a one-way valve (412), wherein the one-way valve (412) is arranged at one end of the condensation pipe (411).

4. The solvent separation and recovery device according to claim 1, characterized in that: It also includes a vacuum mechanism (5), which is connected to the recovery component (42). The vacuum mechanism (5) acts on the recovery component (42) and evacuates the recovery component (42) and the distillation working chamber.

5. The solvent separation and recovery device according to claim 4, characterized in that: A buffer baffle (51) is provided at the working end of the vacuum mechanism (5).

6. The solvent separation and recovery device according to claim 1, characterized in that: It also includes a transfer mechanism (6), the transfer mechanism (6) includes a transfer component (61) and a transfer pipe component (62), the transfer component (61) is connected to the other end of the liquid extraction pipe component (22), and the two ends of the transfer pipe component (62) are respectively connected to the distillation working chamber and the transfer component (61); the liquid pump component (21) draws the cleaning stock liquid from the cleaning mechanism (1) to the transfer component (61) for transfer and storage, and draws the cleaning stock liquid in the transfer component (61) into the distillation working chamber through the transfer pipe component (62).

7. The solvent separation and recovery device according to claim 1, characterized in that: It also includes a solvent recovery mechanism (7), the solvent recovery mechanism (7) includes a solvent pipeline component (71) and a solvent recovery component (72), the two ends of the solvent pipeline component (71) are respectively connected to the distillation working chamber and the solvent recovery component (72), and the solvent recovery component (72) receives the solvent retained in the distillation working chamber.

8. The solvent separation and recovery device according to claim 1, characterized in that: It also includes a control console (8), which is electrically connected to the cleaning mechanism (1), the liquid pump component (21), the distillation mechanism (3) and the recovery pipeline component (41) respectively.

9. The solvent separation and recovery device according to any one of claims 1 to 8, characterized in that: The cleaning mechanism (1) comprises a cleaning main body (11) and a cleaning carrier (12), wherein cleaning liquid is added to the cleaning main body (11), and the cleaning carrier (12) is movably arranged above the cleaning main body (11) and can drive the object to be cleaned on the cleaning carrier (12) to extend into or out of the cleaning liquid.

10. The solvent separation and recovery device according to claim 9, characterized in that: The cleaning mechanism (1) further comprises a circulation member (13), the circulation member (13) comprising a circulation drive body (131), a circulation pipe (132) and a filter (133), the driving end of the circulation drive body (131) being arranged in the circulation pipe (132), the circulation pipe (132) being in communication with the cleaning main body member (11), and the filter (133) being arranged in the circulation pipe (132); the circulation drive body (131) acts on the cleaning liquid in the circulation pipe (132), so that the cleaning liquid circulates.

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