Purification device for producing and recycling butanediol solution

Abstract

The invention discloses a purification device for butanediol solution production and recovery, which comprises a workbench, a recovery filtering tank, a reverse osmosis membrane group and a temporary storage tank, and is characterized in that a horizontal discharge tank is arranged on one side of the top of the workbench, the liquid inlet end of the horizontal discharge tank is communicated with a gas-liquid separation tank, and the liquid outlet end of the horizontal discharge tank is communicated with a vacuum pump group; the other end of the vacuum pump set is connected with a recycling and filtering tank, the bottom of the recycling and filtering tank is connected with a reverse osmosis membrane set, a temporary storage tank is arranged on the outer ring of the bottom of the reverse osmosis membrane set, one side of the exterior of the temporary storage tank is communicated with a concentration tower, and the other side of the exterior of the temporary storage tank is communicated with a high-pressure pump. According to the purification device for production and recovery of the butanediol solution, the ultrafiltration membrane filtration assembly realizes primary purification through aperture grading and step-by-step filtration; and the reverse osmosis membrane group realizes deep desalination and purification by virtue of a high-precision membrane separation technology. The two complements each other to jointly ensure high efficiency and reliability of recovery treatment.

Description

Technical Field

[0001] The invention relates to the technical field of butanediol solution production, in particular to a purification device used for production and recovery of butanediol solution. Background Art

[0002] Today, the main component of butanediol solution is butanediol, also known as 1,3-dihydroxybutane, which is an organic substance. Butanediol solution is usually a colorless or light yellow oily liquid, hygroscopic, and can be used in cosmetics and personal care products, medicine and industry. Its excellent moisturizing properties and safety make it one of the preferred ingredients for many products. In the industrial field, butanediol can be used to make plasticizers, polyester resins, polyurethane resins, etc. It is an important raw material for chemical, textile, papermaking, automotive and other industries.

[0003] The utility model patent with application number 202221961708.X and name of a butanediol purification device relates to the field of chemical production technology, and discloses a butanediol purification device, including a heating device, an evaporator is arranged on the top of the heating device, a condenser is connected to the top of the evaporator through a pipeline, a heating device is arranged on one side of the heating device, and a gas replenishing component is also arranged on the evaporator. The utility model can heat and distill the solution containing butanediol in the evaporator through the heating device, and the obtained butanediol gas can be condensed and liquefied through the condenser for collection, the L-shaped hole will contact the annular groove, and the external gas will pass through the L-shaped hole through the annular groove and the connecting hole into the inner hole, and then introduced into the evaporator, which can balance the pressure inside and outside and facilitate the gas to enter the condenser; turning on the pump can replenish the heating device with the butanediol solution pre-stored in the liquid storage tank, and the heating device can heat and keep the pre-stored solution warm, so that the temperature will not be affected too much when entering the evaporator;

[0004] In the production process of butanediol, waste liquid or mixed solution containing BDO is often produced. If these waste liquids are directly treated or discharged, it will not only cause waste of resources, but also increase production costs and environmental pollution;

[0005] The waste liquid of butanediol solution also contains some macromolecular impurities or colloidal particles, and even some small molecular solvents, which need to be removed during the extraction and storage process. It is impossible to ensure that the recovered solution has a high purity, and the purification device has high requirements;

[0006] Therefore, it is particularly important to develop an efficient production, recovery and purification device for butanediol solution. Summary of the invention

[0007] The object of the present invention is to provide a purification device for the production and recovery of butanediol solution to solve the technical problems raised in the above-mentioned background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a purification device for production and recovery of butanediol solution, comprising a workbench, a recovery filter tank, a reverse osmosis membrane group and a temporary storage tank, wherein a horizontal discharge tank is arranged on one side of the top of the workbench, and the liquid inlet end of the horizontal discharge tank is connected to a gas-liquid separation tank, and the liquid outlet end of the horizontal discharge tank is connected to a vacuum pump group, the other end of the vacuum pump group is connected to the recovery filter tank, the bottom of the recovery filter tank is connected to a reverse osmosis membrane group, and a temporary storage tank is arranged on the outer circle of the bottom of the reverse osmosis membrane group, one side of the outside of the temporary storage tank is connected to a concentration tower, and the other side of the outside of the temporary storage tank is connected to a high-pressure pump;

[0009] An inspection cover is provided on the top of the recovery filter tank, a drainage notch is provided on the bottom of the recovery filter tank, a second exhaust pipeline is connected to the top of the inspection cover, a fourth recovery pipeline is installed on the outer top of the recovery filter tank, and a diffusion nozzle is connected to the water outlet end of the fourth recovery pipeline, a locking groove is provided on the outer ring of the bottom of the recovery filter tank, an ultrafiltration membrane filter assembly is provided inside the recovery filter tank, and a nitrogen pipeline is externally connected to one side of the top of the recovery filter tank;

[0010] The middle end of the locking groove is provided with a side guide rod, and clamping springs are arranged on both sides of the side guide rod. The clamping spring and the bottom of the side guide rod are connected with a mosaic plate, the inner side of the mosaic plate is provided with a sealing plastic plate, and the outer end of the mosaic plate extends with a positioning slider rail group;

[0011] The ultrafiltration membrane filtration assembly comprises a first ultrafiltration membrane defense line plate, a second ultrafiltration membrane defense line plate, a third ultrafiltration membrane defense line plate, a first arc portion and a second arc portion, the second ultrafiltration membrane defense line plate is arranged on the bottom side of the first ultrafiltration membrane defense line plate, and the third ultrafiltration membrane defense line plate is arranged on the bottom side of the second ultrafiltration membrane defense line plate, the first arc portion is arranged in the middle of the first ultrafiltration membrane defense line plate, and the second arc portion is arranged on both sides of the second ultrafiltration membrane defense line plate;

[0012] The bottom walls of the first ultrafiltration membrane defense line plate, the second ultrafiltration membrane defense line plate and the third ultrafiltration membrane defense line plate are paved with constant temperature heating rods.

[0013] Furthermore, a liquid inlet pipeline is provided on one side of the top of the gas-liquid separation tank, and a first exhaust pipeline is provided on the other side of the top of the gas-liquid separation tank, and a first recovery pipeline is connected to the bottom of the gas-liquid separation tank, which is connected to the horizontal discharge tank through the first recovery pipeline.

[0014] Furthermore, the liquid inlet end of the vacuum pump group is connected to a second recovery pipeline, which is connected to the horizontal discharge tank, and the liquid outlet end of the vacuum pump group is connected to a third recovery pipeline, which is connected to the recovery filter tank.

[0015] Furthermore, an interlocking groove is provided on the top of the temporary storage tank, a fifth recovery pipeline is connected to the outer side of the temporary storage tank, a preheating heating rod is arranged at the bottom of the temporary storage tank, and a pump pipe is connected to the outer end of the high-pressure pump, and the pump pipe is connected to the temporary storage tank.

[0016] Furthermore, one external end of the concentration tower is connected to a concentration tower liquid inlet pipeline, and the other external end of the concentration tower is connected to a concentration tower liquid outlet pipeline.

[0017] Furthermore, a pipeline fixing plate is sleeved on the outer wall of the fourth recovery pipeline for support and fixation.

[0018] Furthermore, the locking groove is elastically connected up and down through the clamping spring and the embedding plate, the embedding plate and the sealing plastic plate are integrally fixedly connected, and the locking groove is an up and down lifting structure through the side guide rod and the embedding plate.

[0019] Furthermore, the top end of the sealing plastic plate is arranged to be inclined outward, and the sizes of the sealing plastic plate and the drainage groove fit each other.

[0020] Furthermore, the first ultrafiltration membrane defense plate, the second ultrafiltration membrane defense plate, and the third ultrafiltration membrane defense plate are arranged horizontally in an array, and the upper and lower positions of the first arc surface portion and the second arc surface portion cooperate with each other, and the center ends of the two groups of the second arc surface portions are respectively placed at the bottom of both sides of the arc end of the first arc surface portion.

[0021] Compared with the prior art, the invention has the following beneficial effects: the purification device for production and recovery of butanediol solution:

[0022] 1. The present invention uses a horizontal discharge tank and a gas-liquid separation tank as the starting part of the entire device. The inlet of the horizontal discharge tank is fixedly connected through the first recovery pipeline of the gas-liquid separation tank to ensure that the incoming waste liquid undergoes preliminary gas-liquid separation, thereby reducing the difficulty of subsequent treatment. The horizontal discharge tank is responsible for receiving the BDO-containing waste liquid from the production process;

[0023] The BDO-containing waste liquid received is then connected to a vacuum pump group under the guidance of a second recovery pipeline. The butanediol solution is pre-treated by the vacuum pump group, and some volatile components and impurities in the waste liquid are separated by decompression to prepare for subsequent purification steps, provide a stable vacuum environment, reduce the distillation temperature, and improve the purification efficiency.

[0024] 2. The present invention uses the recovery filter tank as a direct processing space for the butanediol solution. It is one of the core components in the device and is responsible for receiving and processing the waste liquid after being processed by the vacuum pump group. First, a second exhaust pipeline is arranged on the top of the recovery filter tank for discharging the non-condensable gas generated during the processing, and a nitrogen pipeline is extended and connected to the top for introducing nitrogen into the tank when necessary to protect the material in the tank from adverse effects such as oxidation. According to needs, a liquid level gauge, as well as a control system such as PLC and DCS, can be fixedly installed on the recovery filter tank to monitor and control parameters such as temperature, pressure, flow rate, etc. during the entire purification process to ensure the stability and safety of the purification process;

[0025] 3. In the present invention, the ultrafiltration membrane filtration assembly is composed of a plurality of layers of ultrafiltration membrane defense plates, specifically including a first ultrafiltration membrane defense plate, a second ultrafiltration membrane defense plate and a third ultrafiltration membrane defense plate. This multi-level design allows the incoming liquid to be filtered step by step, and each layer intercepts impurities of a specific size. The pore size of each layer of ultrafiltration membrane is carefully designed, gradually decreasing from the first layer to the third layer. This pore size grading mechanism allows larger particles and impurities to be intercepted when passing through the first layer, while smaller particles continue to flow with the liquid to the next layer until they are intercepted by the ultrafiltration membrane of the corresponding pore size. In this way, through the processing of the ultrafiltration membrane filtration assembly, most of the impurities such as suspended matter, colloids, bacteria, etc. in the liquid are effectively removed, providing cleaner raw materials for subsequent processing steps;

[0026] The reverse osmosis membrane group adopts high-precision membrane separation technology. The core lies in its extremely small pore size (usually less than nanometers), which enables it to intercept and exclude almost all soluble solids (such as salts, minerals, etc.), colloids, bacteria, viruses and other microorganisms; when processing the recovery of butanediol solution, the reverse osmosis membrane group can play an important role. The butanediol solution may contain a variety of impurities and soluble solids. These impurities can be removed efficiently through the treatment of the reverse osmosis membrane group, thereby improving the purity and quality of the recovered liquid. At the same time, due to the high precision and stability of the reverse osmosis membrane group, it can ensure the continuity and reliability of the recovery process.

[0027] Therefore, the former achieves preliminary purification through pore size classification and step-by-step filtration, while the latter achieves deep desalination and purification with high-precision membrane separation technology. The two complement each other and jointly ensure the efficiency and reliability of recycling and treatment;

[0028] 4. The present invention cleverly integrates an advanced elastic locking system composed of a locking groove, a precision clamping spring, a stable interlocking plate, a highly elastic sealing plastic plate, a precisely guided side guide rod, and a precisely positioned slider rail assembly into the precise installation structure of the reverse osmosis membrane group. The system applies uniform and powerful elastic support to the bottom interlocking plate through the precision clamping spring, driving it to drive the built-in sealing plastic plate to move down precisely, thereby giving the sealing plastic plate a steady downward thrust, ensuring that it is seamlessly and tightly fitted with the drainage notch, greatly improving the sealing performance and stability between the two.

[0029] Furthermore, side guide rods are carefully arranged in the middle of the four sides of the locking groove. These guide rods not only enhance the stability of the structure, but also ensure the stability and accuracy of the interlocking plate during the lifting process.

[0030] At the same time, the positioning slider rail group cleverly configured at the rear end provides solid and reliable support and guidance for the elastic reset of the embedded plate, ensuring that it can bounce back and reset quickly and stably after completing the sealing task, thereby achieving stable embedding and efficient fixation of the reverse osmosis membrane group.

[0031] The design of this elastic locking structure not only greatly simplifies the installation and removal process of the reverse osmosis membrane group, but also provides unprecedented convenience for its subsequent replacement and regular maintenance, ensuring the continuous efficient operation and long-term stability of the entire recycling and treatment system;

[0032] 5. The present invention ingeniously designs a first curved surface that bulges upward in the core area of ​​the first ultrafiltration membrane defense line plate. This design ingeniously uses the principle of fluid dynamics to effectively guide the solution sprayed in a diffused manner from the top. The moment the solution contacts the first curved surface, it slides down along the elegant slope outside it, causing the particles generated during the filtration process to naturally accumulate on both sides of the curved surface. This layout not only optimizes the filtration path, but also significantly reduces the risk of membrane surface blockage.

[0033] At the same time, the second ultrafiltration membrane defense line plate located below is equipped with a second arc surface that is symmetrical upward and corresponds to the upper surface. This symmetrical design ensures that the solution that smoothly passes through the inner arc surface of the first arc surface can accurately converge to the second arc surface and receive fine processing again. In this process, the impurity particles in the solution are further guided to both sides, effectively avoiding the common accumulation phenomenon on the membrane surface in ultrafiltration operations, that is, as the filtration time increases, the retained substances gradually accumulate and cause the flux to decay.

[0034] The clever integration of this double-layer curved surface design not only ensures that the ultrafiltration membrane can maintain its filtration flux continuously and efficiently, but also ensures the continuity and efficiency of the entire filtration process. Through this innovative structure, the system can operate stably for a long time without frequent cleaning or replacement of membrane components, thereby greatly reducing operation and maintenance costs and improving overall processing efficiency and performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic structural diagram of the overall process of a purification device for production and recovery of butanediol solution of the present invention;

[0036] Figure 2 This is a schematic diagram of the internal structure of a recovery filter tank of a purification device for production and recovery of butanediol solution according to the present invention;

[0037] Figure 3 For the present invention Figure 2 A schematic diagram of the partially enlarged structure at center A;

[0038] Figure 4 This is a schematic diagram of the side structure of a clamping spring of a purification device for production and recovery of butanediol solution according to the present invention;

[0039] Figure 5 The present invention is a schematic diagram of the internal structure of a temporary storage tank of a purification device used for production and recovery of butanediol solution.

[0040] In the figure: 1, workbench; 2, horizontal discharge tank; 3, gas-liquid separation tank; 301, liquid inlet pipeline; 302, first exhaust pipeline; 303, first recovery pipeline; 4, vacuum pump group; 401, second recovery pipeline; 402, third recovery pipeline; 5, recovery filter tank; 501, inspection cover; 502, liquid discharge slot; 503, second exhaust pipeline; 504, constant temperature heating rod; 505, locking groove; 5051, clamping spring; 5052, interlocking plate; 5053, sealing plastic plate; 5054, side guide rod; 5055, positioning slider rail group; 506, nitrogen Gas pipeline; 507, fourth recovery pipeline; 5071, pipeline fixing plate; 5072, diffusion nozzle; 508, ultrafiltration membrane filtration assembly; 5081, first ultrafiltration membrane defense plate; 5082, second ultrafiltration membrane defense plate; 5083, third ultrafiltration membrane defense plate; 5084, first arc portion; 5085, second arc portion; 6, reverse osmosis membrane group; 7, temporary storage tank; 701, interlocking groove; 702, fifth recovery pipeline; 703, preheating heating rod; 8, concentration tower; 801, concentration tower liquid inlet pipeline; 802, concentration tower liquid outlet pipeline; 9, high-pressure pump; 901, pump pipe. DETAILED DESCRIPTION

[0041] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] like Figure 1-5 As shown, the present invention provides a technical solution: a purification device for production and recovery of butanediol solution, comprising a workbench 1, a recovery filter tank 5, a reverse osmosis membrane group 6 and a temporary storage tank 7, wherein a horizontal discharge tank 2 is arranged on one side of the top of the workbench 1, and the liquid inlet end of the horizontal discharge tank 2 is connected to a gas-liquid separation tank 3, and the liquid outlet end of the horizontal discharge tank 2 is connected to a vacuum pump group 4, the other end of the vacuum pump group 4 is connected to the recovery filter tank 5, the bottom of the recovery filter tank 5 is connected to the reverse osmosis membrane group 6, and the bottom outer ring of the reverse osmosis membrane group 6 is provided with a temporary storage tank 7, the external side of the temporary storage tank 7 is connected to a concentration tower 8, and the other side of the external side of the temporary storage tank 7 is connected to a high-pressure pump 9;

[0044] An inspection cover 501 is provided on the top of the recovery filter tank 5, a drainage notch 502 is provided on the bottom of the recovery filter tank 5, a second exhaust pipeline 503 is connected to the top of the inspection cover 501, a fourth recovery pipeline 507 is installed on the top of the outer side of the recovery filter tank 5, and a diffusion nozzle 5072 is connected to the water outlet end of the fourth recovery pipeline 507, a locking groove 505 is provided on the outer ring of the bottom of the recovery filter tank 5, an ultrafiltration membrane filtration assembly 508 is provided inside the recovery filter tank 5, and a nitrogen pipeline 506 is externally connected to one side of the top of the recovery filter tank 5;

[0045] The middle end of the locking groove 505 is provided with a side guide rod 5054, and clamping springs 5051 are arranged on both sides of the side guide rod 5054. The clamping spring 5051 and the bottom of the side guide rod 5054 are connected with a fitting plate 5052, and a sealing plastic plate 5053 is provided on the inner side of the fitting plate 5052. A positioning slider rail group 5055 is extended from one end of the outer side of the fitting plate 5052.

[0046] The ultrafiltration membrane filtration assembly 508 includes a first ultrafiltration membrane defense line plate 5081, a second ultrafiltration membrane defense line plate 5082, a third ultrafiltration membrane defense line plate 5083, a first arc portion 5084 and a second arc portion 5085, the second ultrafiltration membrane defense line plate 5082 is arranged on the bottom side of the first ultrafiltration membrane defense line plate 5081, and the third ultrafiltration membrane defense line plate 5083 is arranged on the bottom side of the second ultrafiltration membrane defense line plate 5082, the first arc portion 5084 is arranged in the middle of the first ultrafiltration membrane defense line plate 5081, and the second arc portion 5085 is arranged on both sides of the second ultrafiltration membrane defense line plate 5082;

[0047] The bottom walls of the first ultrafiltration membrane defense plate 5081, the second ultrafiltration membrane defense plate 5082 and the third ultrafiltration membrane defense plate 5083 are paved with constant temperature heating rods 504;

[0048] A liquid inlet pipeline 301 is provided on one side of the top of the gas-liquid separation tank 3, and a first exhaust pipeline 302 is provided on the other side of the top of the gas-liquid separation tank 3, and a first recovery pipeline 303 is connected to the bottom of the gas-liquid separation tank 3, and is connected to the horizontal discharge tank 2 through the first recovery pipeline 303;

[0049] The liquid inlet end of the vacuum pump group 4 is connected to a second recovery pipeline 401, which is connected to the horizontal discharge tank 2; the liquid outlet end of the vacuum pump group 4 is connected to a third recovery pipeline 402, which is connected to the recovery filter tank 5;

[0050] The top of the temporary storage tank 7 is provided with an engaging groove 701, the outer side of the temporary storage tank 7 is connected with a fifth recovery pipeline 702, the bottom of the temporary storage tank 7 is arranged with a preheating heating rod 703, the outer end of the high-pressure pump 9 is connected with a pump pipe 901, and the pump pipe 901 is connected to the temporary storage tank 7;

[0051] One end of the outside of the concentration tower 8 is connected to a concentration tower liquid inlet pipeline 801, and the other end of the outside of the concentration tower 8 is connected to a concentration tower liquid outlet pipeline 802;

[0052] A pipeline fixing plate 5071 is sleeved on the outer wall of the fourth recovery pipeline 507 for supporting and fixing;

[0053] The locking groove 505 is elastically connected up and down through the clamping spring 5051 and the embedding plate 5052. The embedding plate 5052 and the sealing plastic plate 5053 are integrally fixedly connected. The locking groove 505 is an up and down lifting structure through the side guide rod 5054 and the embedding plate 5052.

[0054] The top of the sealing plastic plate 5053 is arranged to be inclined outward, and the sizes of the sealing plastic plate 5053 and the drainage slot 502 fit each other;

[0055] The first ultrafiltration membrane defense line plate 5081, the second ultrafiltration membrane defense line plate 5082, and the third ultrafiltration membrane defense line plate 5083 are arranged horizontally, and the first arc portion 5084 and the second arc portion 5085 are matched with each other in the upper and lower positions, and the center ends of the two groups of the second arc portion 5085 are respectively placed at the bottom of both sides of the arc end of the first arc portion 5084;

[0056] The horizontal discharge tank 2 and the gas-liquid separation tank 3 are used as the starting part of the whole device. The inlet of the horizontal discharge tank 2 is fixedly connected through the first recovery pipeline 303 of the gas-liquid separation tank 3 to ensure that the incoming waste liquid undergoes preliminary gas-liquid separation, thereby reducing the difficulty of subsequent treatment. The horizontal discharge tank 2 is responsible for receiving the BDO-containing waste liquid from the production process.

[0057] The received BDO-containing waste liquid is then connected to the vacuum pump group 4 under the guidance of the second recovery pipeline 401, and the butanediol solution is pre-treated by the vacuum pump group 4, and some volatile components and impurities in the waste liquid are separated by decompression, so as to prepare for the subsequent purification step, provide a stable vacuum environment, reduce the distillation temperature, and improve the purification efficiency;

[0058] The recovery filter tank 5 is used as a direct processing space for the butanediol solution. It is one of the core components in the device and is responsible for receiving and processing the waste liquid after being processed by the vacuum pump group 4. First, a second exhaust pipeline 503 is arranged on the top of the recovery filter tank 5 to discharge the non-condensable gas generated during the processing, and a nitrogen pipeline 506 is extended and connected to the top to introduce nitrogen into the tank when necessary to protect the material in the tank from adverse effects such as oxidation. According to needs, a liquid level meter, as well as control systems such as PLC and DCS can be fixedly installed on the recovery filter tank 5 to monitor and control parameters such as temperature, pressure, flow rate, etc. during the entire purification process to ensure the stability and safety of the purification process;

[0059] The ultrafiltration membrane filtration assembly 508 is composed of multiple layers of ultrafiltration membrane defense plates, specifically including a first ultrafiltration membrane defense plate 5081, a second ultrafiltration membrane defense plate 5082 and a third ultrafiltration membrane defense plate 5083; this multi-level design allows the incoming liquid to be filtered step by step, and each layer intercepts impurities of a specific size; the pore size of each layer of ultrafiltration membrane is carefully designed, and gradually decreases from the first layer to the third layer; this pore size grading mechanism allows larger particles and impurities to be intercepted when passing through the first layer, while smaller particles continue to flow to the next layer with the liquid until they are intercepted by the ultrafiltration membrane of the corresponding pore size; in this way, through the processing of the ultrafiltration membrane filtration assembly, most of the impurities such as suspended matter, colloids, bacteria, etc. in the liquid are effectively removed, providing cleaner raw materials for subsequent processing steps;

[0060] The reverse osmosis membrane group 6 adopts high-precision membrane separation technology, the core of which lies in its extremely small pore size (usually less than 1 nanometer), which enables it to intercept and exclude almost all soluble solids such as salts, minerals, colloids, bacteria, viruses and other microorganisms; when processing the recovery of butanediol solution, the reverse osmosis membrane group 6 can play an important role; the butanediol solution may contain a variety of impurities and soluble solids, which can be efficiently removed by the treatment of the reverse osmosis membrane group 6, thereby improving the purity and quality of the recovered liquid; at the same time, due to the high precision and stability of the reverse osmosis membrane group 6, it can ensure the continuity and reliability of the recovery process;

[0061] Therefore, the former achieves preliminary purification through pore size classification and step-by-step filtration; the latter achieves deep desalination and purification by relying on high-precision membrane separation technology; the two complement each other and jointly ensure the efficiency and reliability of recycling and treatment;

[0062] In the precise installation structure of the reverse osmosis membrane group 6, an advanced elastic locking system composed of a locking groove 505, a precise clamping spring 5051, a stable interlocking plate 5052, a highly elastic sealing plastic plate 5053, a precisely guided side guide rod 5054, and a precisely positioned slider rail group 5055 is cleverly integrated; the system applies uniform and powerful elastic support to the bottom interlocking plate 5052 through the precise clamping spring 5051, driving it to drive the built-in sealing plastic plate 5053 to move downward precisely, thereby giving the sealing plastic plate 5053 a steady downward thrust, ensuring that it is seamlessly and tightly fitted with the drainage slot 502, greatly improving the sealing efficiency and stability between the two;

[0063] Furthermore, side guide rods 5054 are carefully arranged in the middle of the four sides of the locking groove 505. These guide rods not only enhance the stability of the structure, but also ensure the stability and accuracy of the interlocking plate 5052 during the lifting process;

[0064] At the same time, the positioning slider rail assembly 5055 cleverly configured at one end of the rear side provides solid and reliable support and guidance for the elastic reset of the embedded plate 5052, ensuring that it can bounce back and reset quickly and stably after completing the sealing task, thereby achieving stable embedding and efficient fixation of the reverse osmosis membrane group 6;

[0065] The design of this elastic locking structure not only greatly simplifies the installation and removal process of the reverse osmosis membrane group 6, but also provides unprecedented convenience for its subsequent replacement and regular maintenance, ensuring the continuous efficient operation and long-term stability of the entire recovery and treatment system;

[0066] In the core area of ​​the first ultrafiltration membrane defense line plate 5081, an upwardly protruding first arc portion 5084 is ingeniously designed. This design ingeniously uses the principle of fluid dynamics to effectively guide the solution sprayed in a diffused manner from the top; the moment the solution contacts the first arc portion 5084, it slides down along the elegant slope outside thereof, causing the particles generated during the filtration process to naturally accumulate on both sides of the arc surface. This layout not only optimizes the filtration path, but also significantly reduces the risk of membrane surface blockage;

[0067] At the same time, the second ultrafiltration membrane defense line plate 5082 located below is equipped with a second arc portion 5085 that is symmetrical upward and corresponds to the upper portion; this symmetrical design ensures that the solution that smoothly passes through the inner arc surface of the first arc portion 5084 can be accurately gathered to the second arc portion 5085 and receive fine processing again; in this process, the impurity particles in the solution are further guided to both sides, effectively avoiding the common membrane surface accumulation phenomenon in ultrafiltration operations, that is, as the filtration time increases, the retained substances gradually accumulate and cause the flux to decay;

[0068] The clever integration of this double-layer curved surface design not only ensures that the ultrafiltration membrane can continuously and efficiently maintain its filtration flux, but also ensures the continuity and efficiency of the entire filtration process; through this innovative structure, the system can operate stably for a long time without frequent cleaning or replacement of membrane components, thereby greatly reducing operation and maintenance costs and improving overall processing efficiency and performance;

[0069] The concentration tower 8 is the final processing equipment in the purification device. It separates impurities and excess solvents in the solution through vacuum distillation and other process methods to obtain a high-purity solution. The purified BDO solution is transported to the product tank for storage or further processing;

[0070] The reverse osmosis membrane group 6 is pressurized by a high-pressure pump 9 when in use. The high-pressure pump 9 is one of the key components of the reverse osmosis system of the reverse osmosis membrane group 6. It is responsible for pressurizing the pretreated solution to reach the working pressure required by the reverse osmosis membrane, so that the solution can pass through the reverse osmosis membrane under the action of pressure, and at the same time remove impurities such as inorganic salts, heavy metal ions, organic matter, colloids, bacteria, viruses, etc. in the water, thereby obtaining a high-purity solution.

[0071] In summary, when the purification device for the production and recovery of butanediol solution is used, the butanediol solution is first treated through the liquid inlet pipeline 301 outside the gas-liquid separation tank 3 to make the incoming waste liquid undergo preliminary gas-liquid separation, and then enter the horizontal discharge tank 2 through the first recovery pipeline 303, and then the temporarily stored solution is transported to the vacuum pump group 4 from the second recovery pipeline 401 at the other end of the horizontal discharge tank 2, and connected to the vacuum pump group 4, and the butanediol solution is pre-treated by the vacuum pump group 4, and some volatile components and impurities in the waste liquid are separated by the decompression effect, and then the recovery filter tank 5 is used to receive the waste liquid treated by the vacuum pump group 4, and the waste liquid is transported from the end of the fourth recovery pipeline 507, and the solution is sprayed in a diffused state through the inner diffusion nozzle 5072, so that the treated waste liquid enters the recovery tank, and is protected from oxidation by the nitrogen pipeline 506, so that the sprayed solution passes through the ultrafiltration membrane filtration component 508 step by step for treatment and passes through the first ultrafiltration membrane defense line in sequence. Plate 5081, the second ultrafiltration membrane defense line plate 5082 and the third ultrafiltration membrane defense line plate 5083, the pore size of each layer of ultrafiltration membrane is carefully designed, and gradually decreases from the first layer to the third layer; this pore size classification mechanism allows larger particles and impurities to be intercepted when passing through the first layer, while smaller particles continue to flow to the next layer with the liquid until they are intercepted by the ultrafiltration membrane of the corresponding pore size. When the solution passes through the ultrafiltration membrane filtration component 508, the solution will slide down along the elegant slope on the outside of the first arc portion 5084 at the moment of contact, so that the particles generated during the filtration process are naturally accumulated on both sides of the arc surface. After that, the equipment will be pressurized by the action of the outer high-pressure pump 9 at the same time, so that the solution can pass through the ultrafiltration membrane filtration component 508 and the reverse osmosis membrane group 6 under pressure in turn, and achieve preliminary purification through pore size classification and step-by-step filtration; and high-precision membrane separation technology to achieve deep desalination and purification, ensure the high efficiency of recovery and treatment, and finally the solution is sent to the concentration tower through the pipeline to the concentration tower for purification.

[0072] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A purification device for production and recovery of butanediol solution, comprising a workbench (1), a recovery filter tank (5), a reverse osmosis membrane group (6) and a temporary storage tank (7), It is characterized in that The working table (1) comprises a horizontal discharge trough (2) arranged on one side of the top, the liquid inlet end of the horizontal discharge trough (2) is connected to a gas-liquid separation tank (3), and the liquid outlet end of the horizontal discharge trough (2) is connected to a vacuum pump group (4), the other end of the vacuum pump group (4) is connected to a recovery filter tank (5), the bottom of the recovery filter tank (5) is connected to a reverse osmosis membrane group (6), and a temporary storage tank (7) is arranged on the outer ring of the bottom of the reverse osmosis membrane group (6), one side of the outside of the temporary storage tank (7) is connected to a concentration tower (8), and the other side of the outside of the temporary storage tank (7) is connected to a high-pressure pump (9); The top of the recovery filter tank (5) is provided with an inspection cover (501), the bottom of the recovery filter tank (5) is provided with a drainage notch (502), the top of the inspection cover (501) is connected to a second exhaust pipeline (503), a fourth recovery pipeline (507) is installed on the top of the outer side of the recovery filter tank (5), and the water outlet end of the fourth recovery pipeline (507) is connected to a diffusion nozzle (5072), a locking groove (505) is provided on the outer ring of the bottom of the recovery filter tank (5), an ultrafiltration membrane filtration assembly (508) is arranged inside the recovery filter tank (5), and a nitrogen pipeline (506) is externally connected to one side of the top of the recovery filter tank (5); The locking groove (505) is provided with a side guide rod (5054) at the middle end of the groove, and clamping springs (5051) are arranged on both sides of the side guide rod (5054), and the bottom of the clamping spring (5051) and the side guide rod (5054) are connected with a mosaic plate (5052), and a sealing plastic plate (5053) is provided on the inner side of the mosaic plate (5052), and a positioning slider rail group (5055) is extended from one end of the outer side of the mosaic plate (5052); The ultrafiltration membrane filtration assembly (508) comprises a first ultrafiltration membrane defense line plate (5081), a second ultrafiltration membrane defense line plate (5082), a third ultrafiltration membrane defense line plate (5083), a first arc portion (5084) and a second arc portion (5085), the second ultrafiltration membrane defense line plate (5082) being arranged on the bottom side of the first ultrafiltration membrane defense line plate (5081), and the third ultrafiltration membrane defense line plate (5083) being arranged on the bottom side of the second ultrafiltration membrane defense line plate (5082), the first arc portion (5084) being arranged in the middle of the first ultrafiltration membrane defense line plate (5081), and the second arc portion (5085) being arranged on both sides of the second ultrafiltration membrane defense line plate (5082); The bottom walls of the first ultrafiltration membrane defense plate (5081), the second ultrafiltration membrane defense plate (5082) and the third ultrafiltration membrane defense plate (5083) are provided with constant temperature heating rods (504).

2. A purification device for production and recovery of butanediol solution according to claim 1, Features: A liquid inlet pipeline (301) is provided on one side of the top of the gas-liquid separation tank (3), and a first exhaust pipeline (302) is provided on the other side of the top of the gas-liquid separation tank (3), and a first recovery pipeline (303) is connected to the bottom of the gas-liquid separation tank (3), and is connected to the horizontal discharge tank (2) through the first recovery pipeline (303).

3. A purification device for production and recovery of butanediol solution according to claim 1, Features: The liquid inlet end of the vacuum pump group (4) is connected to a second recovery pipeline (401) and is in communication with the horizontal discharge tank (2); the liquid outlet end of the vacuum pump group (4) is connected to a third recovery pipeline (402) and is in communication with the recovery filter tank (5).

4. A purification device for production and recovery of butanediol solution according to claim 1, Features: The top of the temporary storage tank (7) is provided with an engaging groove (701), the outer side of the temporary storage tank (7) is connected to a fifth recovery pipeline (702), the bottom of the temporary storage tank (7) is arranged with a preheating heating rod (703), and the outer end of the high-pressure pump (9) is connected to a pump pipe (901), and the pump pipe (901) is connected to the temporary storage tank (7).

5. A purification device for production and recovery of butanediol solution according to claim 1, Features: One end of the outside of the concentration tower (8) is connected to a concentration tower liquid inlet pipeline (801), and the other end of the outside of the concentration tower (8) is connected to a concentration tower liquid outlet pipeline (802).

6. A purification device for production and recovery of butanediol solution according to claim 1, Features: A pipeline fixing plate (5071) is sleeved on the outer wall of the fourth recovery pipeline (507) for support and fixation.

7. A purification device for production and recovery of butanediol solution according to claim 1, Features: The locking groove (505) is elastically connected up and down through the clamping spring (5051) and the embedded plate (5052), the embedded plate (5052) and the sealing plastic plate (5053) are integrally fixedly connected, and the locking groove (505) is an up and down lifting structure through the side guide rod (5054) and the embedded plate (5052).

8. A purification device for production and recovery of butanediol solution according to claim 1, Features: The top end of the sealing plastic plate (5053) is arranged to be inclined outward, and the sizes of the sealing plastic plate (5053) and the drainage groove (502) fit each other.

9. A purification device for production and recovery of butanediol solution according to claim 1, Features: The first ultrafiltration membrane defense plate (5081), the second ultrafiltration membrane defense plate (5082), and the third ultrafiltration membrane defense plate (5083) are arranged horizontally in an array, and the upper and lower positions of the first arc surface portion (5084) and the second arc surface portion (5085) cooperate with each other, and the center ends of the two groups of the second arc surface portions (5085) are respectively placed at the bottom of both sides of the arc end of the first arc surface portion (5084).

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