Efficient extraction and separation device based on 1, 4-butylene glycol

Abstract

The invention belongs to the technical field of 1, 4-butylene glycol extraction, and discloses an efficient extraction and separation device based on 1, 4-butylene glycol, the efficient extraction and separation device comprises a main body support, the upper end of the main body support is fixedly connected with a main body shell, and the efficient extraction and separation device further comprises a drying and separation assembly installed in the main body shell and used for evaporating and drying an aqueous solution; the feeding assembly is arranged on the side face of the drying and separating assembly and used for conveying the aqueous solution to the drying and separating assembly; through cooperation of structures such as the evaporation piece and the heating piece, a solution is heated, water is evaporated to be separated, the water-containing solution passes through the liquid containing tank through the rotating frame and the evaporation piece, the water-containing solution adheres to the surfaces of the rotating frame and the evaporation piece and rotates to the heating piece along with the rotating frame, and the water in the solution is evaporated through heat of the heating piece; and crystallization is carried out on the surfaces of the rotating frame and the evaporation sheet, so that water in the solution is separated.

Description

Technical Field

[0001] The present invention belongs to the technical field of 1,4 - butanediol extraction, and specifically relates to a high - efficiency extraction and separation device based on 1,4 - butanediol. Background Art

[0002] 1,4 - butanediol is a chemical substance. It is a colorless to light yellow oily liquid, soluble in water, ethanol, and acetone, slightly soluble in lower aliphatic hydrocarbons and aromatic hydrocarbons. It can be used to synthesize bioactive molecules such as vitamin B6, prepare the intermediate endosulfanol of the organochlorine insecticide endosulfan, participate in the synthesis of high - molecular materials such as polyester and polyurethane as a monomer, be used as a plasticizer for alkyd resins and a cross - linker for synthetic resins, and is used in small amounts in agricultural chemicals, fungicides, and polymer production. Extraction and separation is a method that uses the different solubilities of a solute in two immiscible solvents to transfer the solute from one solvent to another.

[0003] When extracting 1,4 - butanediol, water can be selected as the extraction solvent for separation. After extraction is completed, the organic phase can be separated by standing. The organic phase needs to be dried to remove a small amount of residual water. During drying, the internal water of 1,4 - butanediol can be separated by crystallization. The existing crystallization treatment methods mostly directly heat a large amount of solution. This method will have a poor effect after surface crystallization and precipitation, affecting the separation efficiency. Therefore, a high - efficiency extraction and separation device based on 1,4 - butanediol is proposed. Summary of the Invention

[0004] To solve the problem of low efficiency proposed in the above - mentioned background art, the present invention provides a high - efficiency extraction and separation device based on 1,4 - butanediol.

[0005] To achieve the above object, the present invention provides the following technical solution: A high - efficiency extraction and separation device based on 1,4 - butanediol, including a main body support, and a main body housing fixedly connected to the upper end of the main body support. It further includes: A drying and separation component, which is installed inside the main body housing for evaporating and drying the aqueous solution; A feeding component, which is arranged on the side of the drying and separation component for conveying the aqueous solution to the drying and separation component; A scraping component, which is installed inside the main body housing for scraping the crystals on the drying and separation component; Among them, the drying and separation component includes a rotating frame rotatably connected to the main body housing. The middle part of the rotating frame is linearly distributed with evaporation sheets, and a toothed part is opened on one side inside the rotating frame; The feeding component includes a liquid supplement plate fixedly connected to the main body housing. A liquid storage tank is opened inside the liquid supplement plate, and a pair of liquid infusion pipes are fixedly connected to the side of the liquid supplement plate.

[0006] Preferably, the main body housing is inclined as a whole. An exhaust port is fixedly connected to the top of the main body housing, and a discharge port is provided at the bottom of the main body housing. A power assembly is fixedly connected to the top of the main body bracket; The exhaust port is externally connected to an air extraction device, and the discharge port is externally connected to a collection device.

[0007] Preferably, the evaporation sheet is located on the side of the rotating frame facing the main body housing. A chute is provided inside the rotating frame. A heating sheet is slidably connected to the inside of the evaporation sheet. A first fixing bracket is fixedly connected to the middle of the heating sheet. The first fixing bracket extends from the upper side of the main body housing and is fixedly connected to the main body housing. The heating sheet is located on the side of the rotating frame away from the feeding assembly.

[0008] Preferably, the evaporation sheet is located on the side of the rotating frame close to the power assembly. The power assembly includes a motor and a transmission gear. The motor is fixedly connected to the top of the main body bracket through a base, and the transmission gear is meshed with the tooth teeth.

[0009] Preferably, the liquid replenishing plate is fixedly connected to the main body housing and is in a horizontal state. The liquid replenishing plate is located in the middle of the main body housing and is slidably connected to the rotating frame and the evaporation sheet. The infusion tube is externally connected to a conveying device, and the liquid storage tank is communicated with the surfaces of the rotating frame and the evaporation sheet.

[0010] Preferably, the liquid replenishing plate and the rotating frame are arranged in a staggered manner. When the power assembly drives the rotating frame to rotate, the rotating frame rotates from the bottom of the liquid replenishing plate to the top of the liquid replenishing plate at this time, so that the surfaces of the rotating frame and the evaporation sheet pass through the liquid storage tank and synchronously carry the aqueous solution to move.

[0011] Preferably, the scraping assembly includes a rotating shaft rotatable with the main body housing and a second fixing bracket fixedly connected to the outside of the main body housing. A plurality of hollow scrapers are fixedly connected in a linear distribution on a section of the rotating shaft located inside the main body housing. The hollow scrapers are provided with raised ridges.

[0012] Preferably, one end of the rotating shaft penetrates the main body housing and is connected to a gear shaft through a chain drive. The rotating shaft and the gear shaft are both hinged to the second fixing bracket. The rotating shaft and the hollow scrapers are located below the liquid replenishing plate, and the bottom of the hollow scrapers is communicated with the discharge port.

[0013] Preferably, the hollow scrapers rotate with the evaporation sheet and the raised ridges are all arranged on the surfaces of the hollow scrapers in contact with the rotating frame and the evaporation sheet. The number of the hollow scrapers corresponds to that of the evaporation sheets.

[0014] Preferably, when the rotating frame rotates, the tooth teeth synchronously drive the rotating shaft to rotate through the gear shaft and the chain. At this time, the rotating shaft drives the hollow scrapers to rotate, so that the rotating direction of the hollow scrapers is the same as that of the rotating frame.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the cooperation of structures such as an evaporation sheet and a heating sheet, the present invention heats the solution to evaporate water so as to separate the water. The rotating frame and the evaporation sheet pass by the liquid storage tank, causing the aqueous solution to adhere to the surfaces of the rotating frame and the evaporation sheet. As the rotating frame rotates to the heating sheet, the heat of the heating sheet causes the water in the solution to evaporate and crystallize on the surfaces of the rotating frame and the evaporation sheet, thereby completing the separation of the water in the solution; Through the cooperation of structures such as a main body housing and a feeding assembly, the present invention avoids large liquid drops of the solution falling on the main body housing. By setting the main body housing to be inclined, when the rotating frame rotates inside the main body housing, it is also inclined, and the surface will not carry too much solution. At the same time, it avoids aggregating into large liquid drops and keeps the inner wall of the main body housing clean. At the same time, it can control the amount of solution carried by the rotating frame and avoid incomplete separation of water; Through the cooperation of structures such as teeth and a scraping assembly, the present invention facilitates scraping off the crystallized grains, enabling the separation work to be carried out continuously and efficiently. The teeth drive the rotating shaft to rotate through the gear shaft and the chain, and then synchronously drive the hollow scraping plate to rotate. The rotation direction of the hollow scraping plate is the same as that of the rotating frame, which makes the rotation direction of the contact part between the hollow scraping plate and the rotating frame opposite, so as to improve the scraping effect, avoid crystal accumulation, save the time for cleaning the crystals, and improve the separation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the whole of the present invention; Figure 2 is a cross-sectional view of the main body housing of the present invention; Figure 3 is a schematic cross-sectional view of the scraping assembly of the present invention; Figure 4 is a schematic cross-sectional view of the drying and separating assembly of the present invention; Figure 5 is a schematic diagram of the main body of the drying and separating assembly of the present invention; Figure 6 is an enlarged cross-sectional view of the feeding assembly of the present invention; Figure 7 is a detailed cross-sectional view of the scraping assembly of the present invention.

[0017] In the figure: 1. Main body support; 2. Main body housing; 3. Drying and separation component; 301. Rotating frame; 302. Evaporation sheet; 303. Teeth; 304. Heating sheet; 305. First fixing bracket; 4. Feeding component; 401. Liquid replenishing plate; 402. Liquid storage tank; 403. Liquid infusion tube; 5. Scraping component; 501. Rotating shaft; 502. Hollow scraping plate; 503. Raised ridge; 504. Second fixing bracket; 505. Gear shaft; 6. Exhaust port; 7. Discharge port; 8. Power component. Detailed implementation mode

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] As Figures 1 to 7 shown, the present invention provides an efficient extraction and separation device based on 1,4-butanediol, including a main body support 1, and a main body housing 2 fixedly connected to the upper end of the main body support 1. It further includes: A drying and separation component 3, which is installed inside the main body housing 2 for evaporating and drying the aqueous solution; A feeding component 4, which is arranged on the side of the drying and separation component 3 for transporting the aqueous solution to the drying and separation component 3; A scraping component 5, which is installed inside the main body housing 2 for scraping the crystals on the drying and separation component 3; Among them, the drying and separation component 3 includes a rotating frame 301 rotatably connected to the main body housing 2. The middle part of the rotating frame 301 is linearly distributed with evaporation sheets 302, and teeth 303 are provided on one side inside the rotating frame 301; The feeding component 4 includes a liquid replenishing plate 401 fixedly connected to the main body housing 2. A liquid storage tank 402 is provided inside the liquid replenishing plate 401, and a pair of liquid infusion tubes 403 are fixedly connected to the side of the liquid replenishing plate 401.

[0020] Adopting the above scheme: By transporting the aqueous solution into the liquid storage tank 402, when the aqueous solution is transported into the liquid storage tank 402, it contacts and adheres to the surfaces of the rotating frame 301 and the evaporation sheet 302, and rotates with the rotating frame 301 to the heating sheet 304. Through the heat of the heating sheet 304, the water in the solution evaporates, and crystals are formed on the surfaces of the rotating frame 301 and the evaporation sheet 302. Then the rotating frame 301 rotates and moves to the scraping component 5, and the crystals are scraped off from the surfaces of the rotating frame 301 and the evaporation sheet 302 by the raised ridges 503 on the hollow scraping plate 502. After that, the crystals directly slide from the bottom of the hollow scraping plate 502 to the discharge port 7 and are discharged.

[0021] As shown Figures 1 to 3 in the figure, the main body housing 2 is inclined as a whole. An exhaust port 6 is fixedly connected to the top of the main body housing 2, a discharge port 7 is opened at the bottom of the main body housing 2, and a power assembly 8 is fixedly connected to the top of the main body bracket 1; The exhaust port 6 is externally connected to an air extraction device, and the discharge port 7 is externally connected to a collection device.

[0022] Adopting the above scheme: by setting the main body housing 2 to be inclined, when the rotating frame 301 rotates inside the main body housing 2, the surface of the evaporation sheet 302 inside it is inclined, and it can retain part of the solution on the surface after contacting the aqueous solution, and at the same time will not carry too much solution. By setting the exhaust port 6, the water vapor evaporated from the water is extracted by the air extraction device externally connected to the exhaust port 6. The setting of the discharge port 7 facilitates the collection of crystals. The discharge port 7 is arranged at the bottom of the main body bracket 1, which facilitates the crystals to slide directly along the main body housing 2 through the discharge port 7 into the collection device.

[0023] As shown Figures 3 to 6 in the figure, the evaporation sheet 302 is located on the side of the rotating frame 301 facing the main body housing 2. A chute is opened inside the rotating frame 301, and a heating sheet 304 is slidably connected to the inside of the evaporation sheet 302. A fixing bracket 305 is fixedly connected to the middle of the heating sheet 304. The fixing bracket 305 extends from the upper side of the main body housing 2 and is fixedly connected to the main body housing 2. The heating sheet 304 is located on the side of the rotating frame 301 away from the feeding assembly 4; the evaporation sheet 302 is located on the side of the rotating frame 301 close to the power assembly 8. The power assembly 8 includes two parts: a motor and a transmission gear. The motor is fixedly connected to the top of the main body bracket 1 through a base, and the transmission gear is meshed and connected with the tooth 303.

[0024] Adopting the above scheme: the setting of the drying and separation assembly 3 facilitates the dehydration and separation of the aqueous solution. By setting the rotating frame 301 and the evaporation sheet 302, it can carry part of the solution and move through the feeding assembly 4. When moving to the heating sheet 304, the solution can be heated by the heating sheet 304 to evaporate the water to form crystals. Setting the heating sheet 304 on the side of the rotating frame 301 away from the feeding assembly 4 can prevent the solution from sliding down and dripping on the inner wall of the main body housing 2; When the rotating frame 301 carries the solution and rotates to the highest point of the rotating frame 301, it has already coincided with the position of the heating sheet 304, and then starts to evaporate water. Crystals have begun to precipitate, and the solution can no longer converge into large droplets and drip. By setting the power assembly 8, it is convenient to drive the rotating frame 301 to rotate, so that the rotating frame 301 rotates from the bottom of the liquid replenishing plate 401 upward, and then carries the solution from the liquid replenishing plate 401.

[0025] As shown Figure 1 、 Figure 2 andFigure 6 As shown in the figure, the liquid replenishing plate 401 is fixedly connected to the main body housing 2 and the liquid replenishing plate 401 is in a horizontal state. The liquid replenishing plate 401 is located in the middle of the main body housing 2 and is slidably connected to the rotating frame 301 and the evaporation plate 302. The infusion tube 403 is externally connected to a conveying device, and the liquid storage tank 402 is communicated with the surfaces of the rotating frame 301 and the evaporation plate 302; the liquid replenishing plate 401 and the rotating frame 301 are staggeredly distributed. When the power assembly 8 drives the rotating frame 301 to rotate, at this time, the rotating frame 301 rotates from the bottom of the liquid replenishing plate 401 to the top of the liquid replenishing plate 401, so that the surfaces of the rotating frame 301 and the evaporation plate 302 pass through the liquid storage tank 402 and synchronously carry the aqueous solution to move.

[0026] Adopting the above solution: by setting the feeding assembly 4, the liquid replenishing plate 401 is set in a horizontal state and is staggeredly distributed with the rotating frame 301, so that the area where the rotating frame 301 passes through the liquid storage tank 402 is increased, which is convenient for carrying more solution. The rotating frame 301 is in an inclined state, so that the solution on the rotating frame 301 is not easy to aggregate into large liquid drops and drip. If too much solution is carried, it will only slide along the rotating frame 301 and the evaporation plate 302 and then slide into the liquid storage tank 402 again; the setting of the infusion tube 403 continuously conveys the solution into the liquid storage tank 402 through the conveying device, so as to keep the separation work continuous.

[0027] As Figures 3 to 7 shown in the figure, the scraping assembly 5 includes a rotating shaft 501 that rotates with the main body housing 2 and a second fixed bracket 504 fixedly connected to the outside of the main body housing 2. A plurality of hollow scraping plates 502 are linearly distributed and fixedly connected to a section of the rotating shaft 501 located inside the main body housing 2. The hollow scraping plates 502 are provided with raised ridges 503; one end of the rotating shaft 501 penetrates the main body housing 2 and is connected to a gear shaft 505 through a chain drive. The rotating shaft 501 and the gear shaft 505 are both hinged to the second fixed bracket 504. The rotating shaft 501 and the hollow scraping plates 502 are located below the liquid replenishing plate 401, and the bottom of the hollow scraping plates 502 is communicated with the discharge port 7; the hollow scraping plates 502 rotate with the evaporation plate 302 and the raised ridges 503 are all arranged on the surfaces of the hollow scraping plates 502 in contact with the rotating frame 301 and the evaporation plate 302. The number of the hollow scraping plates 502 corresponds to that of the evaporation plates 302.

[0028] Adopting the above solution: By setting the scraping component 5, it is convenient to scrape off the crystals adhering to the rotating frame 301 and the evaporation sheet 302, enabling the overall separation work to continue efficiently. By setting the rotating shaft 501 and the gear shaft 505, the gear shaft 505 drives the rotating shaft 501 to rotate through a chain, enabling the rotating shaft 501 to rotate synchronously with the rotating frame 301. At the same time, the gear shaft 505 is arranged inside the evaporation sheet 302, making the rotation direction of the gear shaft 505 the same as that of the rotating frame 301. Furthermore, the rotating shaft 501 driven by the gear shaft 505 through the chain has the same rotation direction as the fixed support two 504. Thus, it can be concluded that the hollow scraping plate 502 has the same rotation direction as the rotating shaft 501; Therefore, the rotation direction of the contact part of the hollow scraping plate 502 with the rotating frame 301 and the evaporation sheet 302 is opposite, which makes the hollow scraping plate 502 better at scraping the crystals adhering to the rotating frame 301 and the evaporation sheet 302, avoiding the residue of crystals on the surfaces of the rotating frame 301 and the evaporation sheet 302. At the same time, the setting of the convex ridge 503 can further improve the scraping effect on the crystals.

[0029] As Figures 2 to 7 shown, when the rotating frame 301 rotates, the teeth 303 drive the rotating shaft 501 to rotate synchronously through the gear shaft 505 and the chain. At this time, the rotating shaft 501 will drive the hollow scraping plate 502 to rotate, making the rotation direction of the hollow scraping plate 502 the same as that of the rotating frame 301.

[0030] Adopting the above solution: When the rotating frame 301 rotates, at this time the teeth 303 will drive the rotating shaft 501 to rotate synchronously through the gear shaft 505 and the chain. Since the fixed support two 504 is located inside the rotating frame 301, the rotation direction of the rotating shaft 501 is the same as that of the rotating frame 301. At this time, the rotating shaft 501 will drive the hollow scraping plate 502 to rotate, making the rotation direction of the hollow scraping plate 502 the same as that of the rotating frame 301, which will make the rotation direction of the contact part of the hollow scraping plate 502 with the rotating frame 301 opposite.

[0031] The working principle and usage process of the present invention: During operation, first start the heating sheet 304 and the power component 8 to preheat the rotating frame 301. After the preheating is completed, use an external conveying device and the infusion tube 403 to convey the aqueous solution into the liquid storage tank 402 in the middle of the liquid supplementing plate 401. When the aqueous solution is conveyed into the liquid storage tank 402, it contacts and adheres to the surfaces of the rotating frame 301 and the evaporation sheet 302, and rotates with the rotating frame 301 to the heating sheet 304. The heat of the heating sheet 304 causes the water in the solution to evaporate, and crystals form on the surfaces of the rotating frame 301 and the evaporation sheet 302. At this time, start the external air extraction device to extract the steam inside the main body housing 2; The partially crystallized substances will directly fall and slide along the inside of the main housing 2 to the discharge port 7 and enter the interior of the collection device. At this time, the crystals adhering to the surfaces of the rotating frame 301 and the evaporation sheet 302 will rotate and move with the rotating frame 301 to the scraping assembly 5. While the rotating frame 301 is rotating, the teeth 303 will drive the rotating shaft 501 to rotate synchronously through the gear shaft 505 and the chain to drive the hollow scraper 502 to rotate. When the crystals move to the hollow scraper 502, they will be scraped off from the surfaces of the rotating frame 301 and the evaporation sheet 302 by the protruding ridges 503 on the hollow scraper 502. Then, the crystals will directly slide from the bottom of the hollow scraper 502 to the discharge port 7 and be discharged, thereby completing the dehydration and separation of 1,4-butanediol.

[0032] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An efficient extraction and separation device based on 1,4-butanediol, comprising a main body support (1), and a main body outer shell (2) fixedly connected to the upper end of the main body support (1), characterized in that, It also includes: A drying and separating component (3), which is installed inside the main body housing (2) for evaporating and drying the aqueous solution; A feeding component (4), which is arranged on the side of the drying and separating component (3) for conveying the aqueous solution to the drying and separating component (3); A scraping component (5), which is installed inside the main body housing (2) for scraping the crystals on the drying and separating component (3); Wherein, the drying and separating component (3) includes a rotating frame (301) rotatably connected to the main body housing (2), evaporation plates (302) are linearly distributed in the middle of the rotating frame (301), and a tooth (303) is provided on one side inside the rotating frame (301); The feeding component (4) includes a liquid replenishing plate (401) fixedly connected to the main body housing (2), a liquid storage tank (402) is provided inside the liquid replenishing plate (401), and a pair of infusion tubes (403) are fixedly connected to the side of the liquid replenishing plate (401).

2. The high-efficiency extraction and separation device based on 1,4-butanediol according to claim 1, wherein: The main body housing (2) is integrally inclined, an exhaust port (6) is fixedly connected to the top of the main body housing (2), a discharge port (7) is provided at the bottom of the main body housing (2), and a power component (8) is fixedly connected to the top of the main body bracket (1); The exhaust port (6) is externally connected to an air extraction device, and the discharge port (7) is externally connected to a collection device.

3. The high-efficiency extraction and separation device based on 1,4-butanediol according to claim 1, wherein: The evaporation plates (302) are located on the side of the rotating frame (301) facing the main body housing (2), a chute is provided inside the rotating frame (301), a heating plate (304) is slidably connected to the inside of the evaporation plates (302), a fixing bracket one (305) is fixedly connected to the middle of the heating plate (304), the fixing bracket one (305) extends out from the upper side of the main body housing (2) and is fixedly connected to the main body housing (2), and the heating plate (304) is located on the side of the rotating frame (301) away from the feeding component (4).

4. The high-efficiency extraction and separation device based on 1,4-butanediol according to claim 3, wherein: The evaporation plates (302) are located on the side of the rotating frame (301) close to the power component (8), the power component (8) includes two parts, an electric motor and a transmission gear, wherein the electric motor is fixedly connected to the top of the main body bracket (1) through a base, and the transmission gear is meshed with the tooth (303).

5. The high-efficiency extraction and separation device based on 1,4-butanediol according to claim 1, characterized in that: The liquid replenishing plate (401) is fixedly connected to the main body housing (2) and the liquid replenishing plate (401) is in a horizontal state, the liquid replenishing plate (401) is located at the middle position of the main body housing (2) and is slidably connected to the rotating frame (301) and the evaporation plates (302), the infusion tubes (403) are externally connected to a conveying device, and the liquid storage tank (402) is communicated with the surfaces of the rotating frame (301) and the evaporation plates (302).

6. The high-efficiency extraction and separation device based on 1,4-butanediol according to claim 5, characterized in that: The liquid replenishing plate (401) and the rotating frame (301) are arranged in a staggered manner. When the power component (8) drives the rotating frame (301) to rotate, at this time, the rotating frame (301) rotates from the bottom of the liquid replenishing plate (401) to the top of the liquid replenishing plate (401), so that the surfaces of the rotating frame (301) and the evaporation plates (302) pass through the liquid storage tank (402) and synchronously carry the aqueous solution to move.

7. The high-efficiency extraction and separation device based on 1,4-butanediol according to claim 1, characterized in that: The scraping component (5) includes a rotating shaft (501) that rotates with the main body housing (2) and a second fixed bracket (504) fixedly connected to the outside of the main body housing (2). A plurality of hollow scraping plates (502) are fixedly connected in a linear distribution on a section of the rotating shaft (501) located inside the main body housing (2), and the hollow scraping plates (502) are provided with raised ridges (503).

8. The high-efficiency extraction and separation device based on 1,4-butanediol according to claim 7, characterized in that: One end of the rotating shaft (501) penetrates the main body housing (2) and is connected to a gear shaft (505) through chain drive. The rotating shaft (501) and the gear shaft (505) are both hinged to the second fixed bracket (504). The rotating shaft (501) and the hollow scraping plates (502) are located below the liquid replenishing plate (401), and the bottom of the hollow scraping plates (502) is communicated with the discharge port (7).

9. The high-efficiency extraction and separation device based on 1,4-butanediol according to claim 7, wherein: The hollow scraping plates (502) rotate with the evaporation sheets (302), and the raised ridges (503) are all arranged on the surfaces of the hollow scraping plates (502) in contact with the rotating frame (301) and the evaporation sheets (302). The number of the hollow scraping plates (502) corresponds to that of the evaporation sheets (302).

10. The high-efficiency extraction and separation device based on 1,4-butanediol according to claim 3, wherein: When the rotating frame (301) rotates, the teeth (303) synchronously drive the rotating shaft (501) to rotate through the gear shaft (505) and the chain. At this time, the rotating shaft (501) drives the hollow scraping plates (502) to rotate, so that the rotating direction of the hollow scraping plates (502) is the same as that of the rotating frame (301).

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