Furan distillation and purification device for tetrahydrofuran raw material

Abstract

The invention discloses a furan distillation and purification device for tetrahydrofuran raw materials, which comprises a distillation box, a preheating channel, a distillate flow guide assembly and a multi-stage filter assembly, and the multi-stage filter assembly comprises a first ultrafiltration membrane treatment mechanism, a second ion exchange resin treatment mechanism and a third molecular sieve treatment mechanism. The upper part of the feeding end of the distillation box is connected with a preheating channel, and inner inclined plates are arranged at the bottom of the distillation box and below the preheating channel. According to the furan distillation and purification device for the tetrahydrofuran raw material, when an existing furan distillation and purification device is used for treating a furan solution, although part of impurities can be removed, the purification effect is not thorough, and impurity residues still exist; meanwhile, the device is high in energy consumption in the distillation and extraction process and needs to depend on the combined use of a plurality of devices, so that the operation complexity is increased, the large loss is caused in the material conveying process, and the overall purification efficiency and the product quality are influenced.

Description

Technical Field

[0001] The invention relates to the technical field of tetrahydrofuran processing and production, in particular to a furan distillation and purification device for tetrahydrofuran raw materials. Background Art

[0002] Tetrahydrofuran is a commonly used organic synthesis solvent today and is widely used in many organic synthesis reactions, such as Grignard reaction, metal catalytic reaction, esterification reaction, etc. It can dissolve many organic compounds, making them easier to react, and can also be used in chemical separation and extraction processes, such as for extracting natural products, separating compounds in mixtures, etc. It has a wide range of uses;

[0003] Furan distillation and purification device is a key equipment for purifying furan and its derivatives (such as tetrahydrofuran). In the production process of tetrahydrofuran, furan is a key raw material, and its purity directly affects the quality and production efficiency of the final product. This device separates furan from a mixture containing impurities through the distillation process and utilizes the difference in boiling points of substances, thereby improving its purity.

[0004] Although the existing furan distillation and purification device can remove some impurities when processing furan solution, the purification effect is not thorough and impurities still remain. At the same time, the device has high energy consumption during the distillation and extraction process and needs to rely on the combined use of multiple equipment, which not only increases the complexity of operation, but also leads to large losses during material transmission, affecting the overall purification efficiency and product quality. Summary of the invention

[0005] The object of the present invention is to provide a furan distillation and purification device for tetrahydrofuran raw material, so as to solve the problem that the existing furan distillation and purification device proposed in the above background technology can remove some impurities when processing furan solution, but the purification effect is not thorough and impurities still remain; at the same time, the device has high energy consumption in the distillation and extraction process and needs to rely on the combined use of multiple devices, which not only increases the complexity of operation, but also leads to large losses in the material transmission process, affecting the overall purification efficiency and product quality.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a furan distillation and purification device for tetrahydrofuran raw material, comprising a distillation box, a preheating channel, a distillate guide component and a multi-stage filtration component, the multi-stage filtration component comprising a first ultrafiltration membrane treatment mechanism, a second ion exchange resin treatment mechanism and a third molecular sieve treatment mechanism, the upper part of the feed end of the distillation box is connected with a preheating channel, the bottom of the distillation box and the position below the preheating channel are provided with an inner inclined plate, and the bottom of the slope of the inner inclined plate is provided with a heating distillation chamber, the inner end of the distillation box is sunken and provided with a drainage channel, and the horizontal end of the drainage channel is provided with a drainage port, and a top card slot is provided on one side of the top of the distillation box;

[0007] A partition is provided on one side of the heating distillation chamber, a distillate guide assembly is embedded in the top wall of the distillation box, and the distillate guide assembly and the partition are vertically matched with each other in upper and lower positions, a circulation pump is provided on one side of the bottom of the distillation box, and the circulation pump includes a liquid extraction pipe and a liquid supply pipe, and the liquid inlet end of the circulation pump is connected with the liquid extraction pipe, and the liquid outlet end of the circulation pump is connected with the liquid supply pipe, the liquid extraction pipe and the liquid supply pipe are respectively placed on both sides of the partition, and an adjustable nozzle is vertically arranged on the surface of one end of the partition close to the liquid supply pipe, a first ultrafiltration membrane treatment mechanism is vertically arranged on one side of the adjustable nozzle, and a second ion exchange resin treatment mechanism is arranged in parallel on the other side of the first ultrafiltration membrane treatment mechanism, and a third molecular sieve treatment mechanism is arranged in parallel on the other side of the second ion exchange resin treatment mechanism:

[0008] The preheating channel comprises a guide plate and an embedded heating wire, the preheating channel is staggered with guide plates, and the guide plates are wrapped with embedded heating wires, and the guide plates are arranged in an inclined downward shape;

[0009] The distillate flow guide assembly comprises a liquid guide metal plate and an adsorption fiber plate, and a plurality of groups of the liquid guide metal plates are alternately provided with adsorption fiber plates between adjacent groups;

[0010] The first ultrafiltration membrane processing mechanism comprises a side clamp frame, an ultrafiltration membrane panel, a middle rod, a threaded connecting rod, a rotating rod and a side locking bolt, wherein the middle part of the side clamp frame is provided with a middle rod, the inner side of the side clamp frame is clamped with an ultrafiltration membrane panel, the top of the middle rod is axially connected with a rotating rod, and the bottom of the middle rod is axially connected with a threaded connecting rod, and a side locking bolt is provided at the connection between the side clamp frame and the side end of the ultrafiltration membrane panel;

[0011] A vacuum pump is installed inside the top card slot, and the vacuum pump and the distillation box are communicated with each other.

[0012] Furthermore, the preheating channel also includes a feed port, a discharge port and a power supply device. The top of the preheating channel is provided with a feed port, and the bottom of the preheating channel is provided with a discharge port. One end of the outside of the preheating channel is connected to a power supply device.

[0013] Furthermore, an external liquid pipe is installed on the outer side of the partition plate, and the external liquid pipe and the multiple groups of adjustable nozzles are interconnected.

[0014] Furthermore, a side frame is installed at the bottom of the power supply device.

[0015] Furthermore, a discharge baffle is provided on one side of the interior of the discharge channel, and an electric telescopic rod is axially connected to the bottom of the discharge baffle.

[0016] Furthermore, the discharge baffle forms a transmission rotation structure through the electric telescopic rod and the discharge channel, and the discharge baffle rotates toward the discharge port.

[0017] Furthermore, a liquid cylinder is connected to the bottom of the inner inclined plate, and a lifting rod is installed on the top of the liquid cylinder, and the lifting rod is inserted into the interior of the distillation box, and a feed baffle is installed on the top of the lifting rod, and the feed baffle and the discharge port size diameter cooperate with each other.

[0018] Furthermore, the first ultrafiltration membrane treatment mechanism, the second ion exchange resin treatment mechanism and the third molecular sieve treatment mechanism are arranged in parallel, and the cross-sectional size of the multi-stage filtration assembly is embedded in the distillation box.

[0019] Furthermore, the side clamp frame forms a detachable structure through the side locking bolts and the ultrafiltration membrane panel, the side clamp frame, the threaded connecting rod and the rotating rod are transmission-connected, and the side clamp frame and the ultrafiltration membrane panel are embedded and wrapped with each other.

[0020] Compared with the prior art, the beneficial effects of the present invention are: the furan distillation and purification device for tetrahydrofuran raw materials, through the collaborative operation of multiple professional institutions, shows a high degree of functional integration. It adopts the design of an integrated distillation box, successfully integrating the entire distillation and purification process into a single device. The left chamber of the device is set as the distillation zone. When the furan solution reaches its boiling point and begins to distill, the generated steam will naturally rise. At this time, the distillate guide component located at the top of the device plays a key role. It guides the steam to flow along the inclined surface of the top wall to ensure that the steam is mixed with the pretreated furan solution and enters the next stage of secondary purification treatment together;

[0021] In the secondary purification treatment, the multi-stage filtration component composed of the first ultrafiltration membrane treatment mechanism, the second ion exchange resin treatment mechanism and the third molecular sieve treatment mechanism is used. First, the bacteria, viruses, colloids and macromolecular organic matter in the solution are filtered through the multiple ultrafiltration membranes in the ultrafiltration membrane panel to remove larger impurity particles and colloids. Then, the ion exchange resin plate in the second ion exchange resin treatment mechanism is used to remove ionic impurities in the water in view of the ionic impurities that may exist in the furan purification process. Finally, the molecular sieve of the third molecular sieve treatment mechanism is used to remove impurity molecules with a large difference in molecular weight from furan, which is used to remove tiny impurities that are difficult to remove by other methods. The design of the multi-stage filtration component is formed by combining different filter materials. Through the reasonable combination of different filter materials, the furan solution can be efficiently purified and its purity level can be significantly improved.

[0022] 1. In the present invention, a distillation area is arranged on the left side of the integrated distillation box, and an inner inclined plate and a heating distillation chamber are arranged at the bottom of the area. The inner inclined plate is designed to guide the materials fed from the top to enter the heating distillation chamber for heating and distillation. A lifting rod is arranged through the middle of the inner inclined plate, and the rod can control the lifting and lowering of the feed baffle plate on the upper part thereof, so as to accurately control the opening and closing of the discharge port of the top preheating channel, and realize accurate control of the feeding amount;

[0023] A liquid extraction pipe is provided in the inner cavity of the heating distillation chamber, which can cooperate with the circulation pump to transport the distilled liquid to the space on the other side of the partition plate, so as to facilitate centralized secondary purification.

[0024] A distillation liquid guide assembly is provided on the top of the heating distillation chamber, and the overall bottom wall surface is arranged in an inclined shape, so that the solution produced when the steam condenses can slide down along the inclined surface, and the liquefied condensed liquid is transported to the space position at the other end of the partition plate, so as to facilitate the centralized secondary purification treatment;

[0025] The distillation liquid guide assembly adopts multiple groups of liquid guide metal plates and adsorption fiber plates arranged in a staggered manner. The liquid guide metal plates can ensure the rapid liquefaction of the vapor and avoid the slow condensation of the vapor. The staggered adsorption fiber plates can use the internal structure of the fibers to absorb impurities and particles in the vapor when the vapor passes through the fibers in the adsorption fiber plates, thereby reducing the content of particle impurities in the vapor and ensuring that the condensed liquid is purer.

[0026] This design not only improves the distillation efficiency, but also ensures the purity of the distilled liquid and meets the needs of high-precision purification.

[0027] 2. In the present invention, the preheating channel is set in an independent space, and the inside is provided with staggered drainage plates on both sides. The drainage plates on both sides are inclined inward, which can control the flow rate of the feed port at the top of the channel. The drainage plates are used to slow down the flow rate, and the embedded heating wires wrapped inside the drainage plates are used to effectively heat the input raw materials to achieve the preheating effect. The drainage plates are used to extend the solution flow channel and undertake the tasks of preheating and pretreatment, thereby realizing efficient integration of the process;

[0028] 3. In the present invention, the partition plate separates the internal space of the distillation box and cooperates with the position of the top distillate guide component. An adjustable nozzle is arranged near the right purification space end of the partition plate. On the one hand, the adjustable nozzle can be connected to the circulation pump through an external liquid pipe to extract the solution in the distillation zone and spray the solution toward the first ultrafiltration membrane treatment mechanism, thereby providing strong support for the auxiliary filtration operation and making the filtration process more efficient and smooth. On the other hand, the adjustable nozzle can be connected to the cleaning liquid through the external liquid pipe. After the purification process, the cleaning liquid can be used to comprehensively rinse and clean the inside of the device, thereby making the cleaning of the device more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the internal structure of a furan distillation and purification device for tetrahydrofuran raw material of the present invention;

[0030] Figure 2 A furan distillation and purification device for tetrahydrofuran raw material of the present invention Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0031] Figure 3 A furan distillation and purification device for tetrahydrofuran raw material of the present invention Figure 1 A schematic diagram of the partially enlarged structure at B in the middle;

[0032] Figure 4 It is a schematic diagram of the three-dimensional structure of a distillate guide assembly of a furan distillation and purification device for tetrahydrofuran raw material of the present invention;

[0033] Figure 5 The present invention is a schematic side view of the first resin treatment mechanism of a furan distillation and purification device for tetrahydrofuran raw material.

[0034] In the figure: 1. distillation box; 101. inner inclined plate; 102. top card slot; 103. drainage channel; 104. drainage port; 2. preheating channel; 201. flow guide plate; 202. feed port; 203. discharge port; 204. embedded heating wire; 205. power supply device; 3. distillate flow guide assembly; 301. liquid guide metal plate; 302. adsorption fiber board; 4. partition plate; 401. adjustable nozzle; 402. external liquid pipe; 5. first ultrafiltration membrane treatment mechanism; 501 , side bracket; 502, ultrafiltration membrane panel; 503, middle rod; 504, threaded connecting rod; 505, rotating rod; 506, side locking bolt; 6, second ion exchange resin processing mechanism; 7, third molecular sieve processing mechanism; 8, heating distillation chamber; 9, circulation pump; 901, suction pipe; 902, liquid supply pipe; 10, side frame; 11, electric telescopic rod; 12, discharge baffle; 13, vacuum pump; 14, liquid cylinder; 1401, lifting rod; 1402, feed baffle. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] like Figure 1-5As shown, the present invention provides a technical solution: a furan distillation and purification device for tetrahydrofuran raw material, a distillation box 1, a preheating channel 2, a distillate guide component 3 and a multi-stage filtration component, the multi-stage filtration component includes a first ultrafiltration membrane treatment mechanism 5, a second ion exchange resin treatment mechanism 6 and a third molecular sieve treatment mechanism 7, the upper part of the feed end of the distillation box 1 is connected with the preheating channel 2, the bottom of the distillation box 1 and the position below the preheating channel 2 are provided with an inner inclined plate 101, and the slope bottom of the inner inclined plate 101 is provided with a heating distillation chamber 8, the inner end of the distillation box 1 is sunken and provided with a drainage channel 103, and the horizontal end of the drainage channel 103 is provided with a drainage port 104, and a top card slot 102 is provided on one side of the top of the distillation box 1;

[0038] A partition plate 4 is provided on one side of the heating distillation chamber 8, a distillate flow guide assembly 3 is embedded in the top wall of the distillation box 1, and the distillate flow guide assembly 3 and the partition plate 4 are vertically matched with each other in the upper and lower positions, a circulation pump 9 is provided on one side of the bottom of the distillation box 1, and the circulation pump 9 includes a liquid extraction pipe 901 and a liquid supply pipe 902, and the liquid inlet end of the circulation pump 9 is connected with the liquid extraction pipe 901, and the liquid outlet end of the circulation pump 9 is connected with the liquid supply pipe 902, the liquid extraction pipe 901 and the liquid supply pipe 902 are respectively placed on both sides of the partition plate 4, and an adjustable nozzle 401 is vertically arranged on the surface of one end of the partition plate 4 close to the liquid supply pipe 902, and a first ultrafiltration membrane treatment mechanism 5 is vertically arranged on one side of the adjustable nozzle 401, and a second ion exchange resin treatment mechanism 6 is arranged in parallel on the other side of the first ultrafiltration membrane treatment mechanism 5, and a third molecular sieve treatment mechanism 7 is arranged in parallel on the other side of the second ion exchange resin treatment mechanism 6:

[0039] The preheating channel 2 includes a guide plate 201 and an embedded heating wire 204. The guide plates 201 are arranged in a staggered manner inside the preheating channel 2, and the embedded heating wire 204 is wrapped inside the guide plates 201. The guide plates 201 are arranged in an inclined downward shape.

[0040] The distillate flow guide assembly 3 includes a liquid guide metal plate 301 and an adsorption fiber plate 302, and a plurality of groups of liquid guide metal plates 301 are alternately provided with adsorption fiber plates 302 between adjacent groups;

[0041] The first ultrafiltration membrane treatment mechanism 5 comprises a side bracket 501, an ultrafiltration membrane panel 502, a middle rod 503, a threaded connecting rod 504, a rotating rod 505 and a side locking bolt 506. The middle rod 503 is arranged in the middle of the side bracket 501, the ultrafiltration membrane panel 502 is clamped on the inner side of the side bracket 501, the top of the middle rod 503 is axially connected with the rotating rod 505, and the bottom of the middle rod 503 is axially connected with the threaded connecting rod 504, and the side locking bolt 506 is arranged at the connection between the side bracket 501 and the ultrafiltration membrane panel 502;

[0042] A vacuum pump 13 is installed on the inner side of the top card slot 102, and the vacuum pump 13 and the distillation box 1 are interconnected; the preheating channel 2 also includes a feed port 202, a discharge port 203 and a power supply device 205, the top of the preheating channel 2 is provided with a feed port 202, the bottom of the preheating channel 2 is provided with a discharge port 203, and the external end of the preheating channel 2 is connected to the power supply device 205; an external liquid pipe 402 is installed on the outer side of the partition plate 4, and the external liquid pipe 402 and multiple groups of adjustable nozzles 401 are interconnected; a side frame 10 is installed at the bottom of the power supply device 205; a discharge baffle 12 is provided on one side of the inner side of the discharge channel 103, and the bottom axis of the discharge baffle 12 is connected to the electric telescopic rod 11; the discharge baffle 12 forms a transmission rotation structure through the electric telescopic rod 11 and the discharge channel 103, and the discharge The baffle 12 rotates toward the discharge port 104; the bottom of the inner inclined plate 101 is connected to the liquid cylinder 14, and the top of the liquid cylinder 14 is installed with a lifting rod 1401, and the lifting rod 1401 is inserted into the interior of the distillation box 1, and the top of the lifting rod 1401 is installed with a feed baffle 1402, and the feed baffle 1402 and the discharge port 203 are matched with each other in size; the first ultrafiltration membrane treatment mechanism 5, the second ion exchange resin treatment mechanism 6 and the third molecular sieve treatment mechanism 7 are arranged in parallel, and the cross-sectional size of the multi-stage filtration component is embedded in the distillation box 1; the side clamp frame 501 forms a detachable structure through the side locking bolt 506 and the ultrafiltration membrane panel 502, the side clamp frame 501, the threaded connecting rod 504 and the rotating rotating rod 505 are transmission-connected, and the side clamp frame 501 and the ultrafiltration membrane panel 502 are embedded and wrapped with each other.

[0043] The furan distillation and purification device for tetrahydrofuran raw materials shows a high degree of functional integration through the collaborative work of multiple professional institutions. It adopts the design of an integrated distillation box 1, successfully integrating the entire distillation and purification process into a single device. The left chamber of the device is set as the distillation zone. When the furan solution reaches its boiling point and begins to distill, the generated steam will naturally rise. At this time, the distillate guide component 3 located at the top of the device plays a key role. It guides the steam to flow along the inclined surface of the top wall to ensure that the steam is mixed with the pretreated furan solution and enters the next stage of secondary purification together;

[0044] In the secondary purification treatment, the multi-stage filtration component composed of the first ultrafiltration membrane treatment mechanism 5, the second ion exchange resin treatment mechanism 6 and the third molecular sieve treatment mechanism 7 first filters the bacteria, viruses, colloids and macromolecular organic matter in the solution through the multiple ultrafiltration membranes in the ultrafiltration membrane panel 502 to remove larger impurity particles and colloids. Then, the ion exchange resin plate in the second ion exchange resin treatment mechanism 6 is used to remove ionic impurities in the water in the furan purification process. Finally, the molecular sieve of the third molecular sieve treatment mechanism 7 is used to remove impurity molecules with a large difference in molecular weight from furan, which is used to remove tiny impurities that are difficult to remove by other methods. The design of the multi-stage filtration component is formed by combining different filter materials. Through the reasonable combination of different filter materials, the furan solution can be efficiently purified and its purity level can be significantly improved.

[0045] The inside left side of the integrated distillation box 1 is provided with a distillation area, the bottom of which is provided with an inner inclined plate 101 and a heating distillation chamber 8. The inner inclined plate 101 is designed to guide the materials fed from the top into the heating distillation chamber 8 for heating and distillation. A lifting rod 1401 is provided through the middle of the inner inclined plate 101, which can control the lifting and lowering of the feed baffle 1402 on its upper part, thereby accurately regulating the opening and closing of the discharge port 203 of the top preheating channel 2, and realizing accurate control of the feeding amount.

[0046] A liquid extraction pipe 901 is provided in the inner cavity of the heating distillation chamber 8, which can cooperate with the circulation pump 9 to transport the distilled liquid to the space on the other side of the partition plate 4, so as to facilitate centralized secondary purification;

[0047] A distillation liquid guide assembly 3 is provided on the top of the heating distillation chamber 8, and the overall bottom wall surface is arranged in an inclined shape, so that the solution produced when the steam condenses can slide down along the inclined surface, and the liquefied condensed liquid is transported to the space position at the other end of the partition plate 4, so as to facilitate the centralized secondary purification treatment;

[0048] The distillate flow guide assembly 3 is provided with multiple groups of liquid guide metal plates 301 and adsorption fiber plates 302 arranged in a staggered manner. The liquid guide metal plates 301 can ensure rapid liquefaction of the vapor and avoid slow condensation of the vapor. The staggered adsorption fiber plates 302 can use the internal structure of the fibers to adsorb impurities and particles in the vapor when the vapor passes through the fibers in the adsorption fiber plates 302, thereby reducing the content of particle impurities in the vapor and ensuring that the condensed liquid is purer.

[0049] This design not only improves the distillation efficiency, but also ensures the purity of the distilled liquid and meets the needs of high-precision purification.

[0050] The preheating channel 2 is set in an independent space, and is provided with guide plates 201 arranged alternately on both sides. The guide plates 201 on both sides are inclined inward, which can control the flow rate of the feed port 202 at the top of the channel. The guide plates 201 are used to slow down the flow rate, and the embedded heating wires 204 wrapped inside the guide plates 201 are used to effectively heat the input raw materials to achieve the preheating effect. The guide plates 201 are used to undertake the tasks of preheating and pretreatment on the basis of extending the solution flow channel, so as to achieve efficient integration of the process;

[0051] The partition plate 4 separates the internal space of the distillation box 1 and cooperates with the position of the top distillate guide component 3. The partition plate 4 is provided with an adjustable nozzle 401 near the right purification space end. The adjustable nozzle 401 can be connected to the circulation pump 9 through an external liquid pipe 402, and is used to extract the solution in the distillation area and spray the solution toward the first ultrafiltration membrane treatment mechanism 5, providing strong support for the auxiliary filtration operation, making the filtration process more efficient and smooth. On the other hand, the adjustable nozzle 401 can be connected to the cleaning liquid through the external liquid pipe 402, and the cleaning liquid can be used to perform a full range of flushing and cleaning of the inside of the device after the purification process, making the cleaning of the device more convenient;

[0052] The top card slot 102 located above the end of the right purification space has a vacuum pump 13 engaged therein. The vacuum pump 13 has the ability to accurately control the internal air pressure of the device. By performing the vacuum operation inside the distillation box 1, the pressure inside the distillation box 1 is effectively reduced, thereby constructing a significant pressure difference in the purification space. This pressure gradient enables the solution on the left side of the multi-stage filtration component to be more smoothly transmitted to the right side of the multi-stage filtration component, thereby ensuring the efficiency and smoothness of the purification and separation process, and further improving the performance of the overall process;

[0053] The outer sides of the multiple groups of multi-stage filter components are limited by side brackets 501, and the filter elements are fixed on the inner sides of the side brackets 501 to ensure the stable placement of multiple filter materials such as the inner ultrafiltration membrane panel 502. A center rod 503 is provided in the middle of the side brackets 501, and a rotating rod 505 is provided on the top, and a threaded connecting rod 504 is connected to the bottom. The rotating rotating rod 505 on the top can be rotated to drive the threaded connecting rod 504 on the bottom to rotate, so that the threaded connecting rod 504 is separated from the bottom wall of the inner cavity of the distillation box 1, and the multi-stage filter component is separated from the distillation box 1 for replacement and maintenance, thereby improving maintenance efficiency and reducing maintenance costs.

[0054] 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 furan distillation and purification device for tetrahydrofuran raw material, characterized in that, The invention comprises a distillation box (1), a preheating channel (2), a distillate flow guide assembly (3) and a multi-stage filtration assembly, wherein the multi-stage filtration assembly comprises a first ultrafiltration membrane treatment mechanism (5), a second ion exchange resin treatment mechanism (6) and a third molecular sieve treatment mechanism (7), wherein the upper portion of the feed end of the distillation box (1) is connected to the preheating channel (2), an inner inclined plate (101) is arranged at the bottom of the distillation box (1) and below the preheating channel (2), and a heating distillation chamber (8) is arranged at the slope bottom of the inner inclined plate (101), a drainage channel (103) is arranged at the inner end of the distillation box (1), and a drainage port (104) is arranged at the horizontal end of the drainage channel (103), and a top card slot (102) is arranged at one side of the top of the distillation box (1); A partition plate (4) is provided on one side of the heating distillation chamber (8), a distillate guide assembly (3) is embedded in the top wall of the distillation box (1), and the distillate guide assembly (3) and the partition plate (4) are vertically matched with each other in upper and lower positions, a circulation pump (9) is provided on one side of the bottom of the distillation box (1), and the circulation pump (9) includes a liquid extraction pipe (901) and a liquid supply pipe (902), and the liquid inlet end of the circulation pump (9) is connected to the liquid extraction pipe (901), and the liquid outlet end of the circulation pump (9) is connected to the liquid supply pipe (902), and the liquid extraction pipe (901) is connected to the liquid extraction pipe (902). The liquid pipe (901) and the liquid supply pipe (902) are respectively placed on both sides of the partition plate (4); an adjustable nozzle (401) is vertically arranged on the surface of one end of the partition plate (4) close to the liquid supply pipe (902); a first ultrafiltration membrane treatment mechanism (5) is vertically arranged on one side of the adjustable nozzle (401); a second ion exchange resin treatment mechanism (6) is arranged in parallel on the other side of the first ultrafiltration membrane treatment mechanism (5); and a third molecular sieve treatment mechanism (7) is arranged in parallel on the other side of the second ion exchange resin treatment mechanism (6): The preheating channel (2) comprises a guide plate (201) and an embedded heating wire (204); the guide plates (201) are arranged in a staggered manner inside the preheating channel (2), and the embedded heating wire (204) is wrapped inside the guide plates (201); the guide plates (201) are arranged in a downwardly inclined manner; The distillate flow guide component (3) comprises a liquid guide metal plate (301) and an adsorption fiber plate (302), and a plurality of groups of the liquid guide metal plates (301) are alternately provided with adsorption fiber plates (302) between adjacent groups; The first ultrafiltration membrane treatment mechanism (5) comprises a side bracket (501), an ultrafiltration membrane panel (502), a middle rod (503), a threaded connecting rod (504), a rotating rod (505) and a side locking bolt (506); the middle part of the side bracket (501) is provided with a middle rod (503); the inner side of the side bracket (501) is engaged with the ultrafiltration membrane panel (502); the top of the middle rod (503) is axially connected to the rotating rod (505); the bottom of the middle rod (503) is axially connected to the threaded connecting rod (504); and the side locking bolt (506) is provided at the connection between the side bracket (501) and the ultrafiltration membrane panel (502); A vacuum pump (13) is installed inside the top card slot (102), and the vacuum pump (13) and the distillation box (1) are connected to each other.

2. A furan distillation and purification device for tetrahydrofuran raw material according to claim 1, characterized in that: The preheating channel (2) further comprises a feed port (202), a discharge port (203) and a power supply device (205); the top of the preheating channel (2) is provided with a feed port (202), the bottom of the preheating channel (2) is provided with a discharge port (203), and one external end of the preheating channel (2) is connected to the power supply device (205).

3. A furan distillation and purification device for tetrahydrofuran raw material according to claim 1, characterized in that: An external liquid pipe (402) is installed on the outer side of the partition plate (4), and the external liquid pipe (402) and the plurality of groups of adjustable nozzles (401) are interconnected.

4. A furan distillation and purification device for tetrahydrofuran raw material according to claim 2, characterized in that: A side frame (10) is installed at the bottom of the power supply device (205).

5. A furan distillation and purification device for tetrahydrofuran raw material according to claim 1, characterized in that: A discharge baffle (12) is provided on one side of the interior of the discharge channel (103), and an electric telescopic rod (11) is axially connected to the bottom of the discharge baffle (12).

6. A furan distillation and purification device for tetrahydrofuran raw material according to claim 5, characterized in that: The discharge baffle (12) forms a transmission rotation structure between the electric telescopic rod (11) and the liquid discharge channel (103), and the discharge baffle (12) rotates toward the liquid discharge port (104).

7. A furan distillation and purification device for tetrahydrofuran raw material according to claim 7, characterized in that: The bottom of the inner inclined plate (101) is connected to the liquid cylinder (14), and the top of the liquid cylinder (14) is installed with a lifting rod (1401), and the lifting rod (1401) is inserted into the interior of the distillation box (1), and the top of the lifting rod (1401) is installed with a feed baffle (1402), and the feed baffle (1402) and the discharge port (203) are matched with each other in size.

8. A furan distillation and purification device for tetrahydrofuran raw material according to claim 1, characterized in that: The first ultrafiltration membrane treatment mechanism (5), the second ion exchange resin treatment mechanism (6) and the third molecular sieve treatment mechanism (7) are arranged in parallel, and the cross-sectional size of the multi-stage filtration assembly is embedded in the distillation box (1).

9. A furan distillation and purification device for tetrahydrofuran raw material according to claim 1, characterized in that: The side clamp (501) forms a detachable structure through the side locking bolt (506) and the ultrafiltration membrane panel (502); the side clamp (501), the threaded connecting rod (504) and the rotating rod (505) are transmission-connected, and the side clamp (501) and the ultrafiltration membrane panel (502) are mutually embedded and wrapped.

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