Preparation system and process for co-production of tetrahydrofuran copolyether glycol and polytetrahydrofuran

Abstract

The invention discloses a preparation system and process for co-production of tetrahydrofuran copolyether glycol and polytetrahydrofuran, and relates to the technical field of preparation devices. Comprising a supporting base, the supporting base is provided with a preparation mechanism used for co-producing tetrahydrofuran copolyether glycol and polytetrahydrofuran, according to the preparation system and process for co-producing tetrahydrofuran copolyether glycol and polytetrahydrofuran, an arranged vertical rod rotates under the action of a connecting rod through a fifth bevel gear and a fourth bevel gear, and the vertical rod rotates through the fifth bevel gear and the fourth bevel gear; a vertical rod rotates to drive a grinding block on the outer wall of a first conical block to be matched with a conical groove, corresponding to the first conical block, in the treatment shell to rotate, and the grinding block rotates to grind and crush entering materials, so that the materials are ground into finer particles, the contact area between the materials is increased, the reaction is more sufficient and rapid, and the reaction efficiency is improved. Fine particles are more easily and uniformly dispersed in the reaction liquid, so that the reaction rate is increased, and the subsequent reaction is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of preparation devices, and particularly to a preparation system and process for co-producing tetrahydrofuran copolyether diol and polytetrahydrofuran. Background Art

[0002] Polytetrahydrofuran ether diol is a chemical substance with the molecular formula HO[CH2CH2CH2CH2O]nH. It is a white waxy solid that becomes a transparent liquid when the temperature exceeds room temperature. It is easily soluble in alcohols, esters, ketones, aromatic hydrocarbons, and chlorinated hydrocarbons, and insoluble in aliphatic hydrocarbons and water. When the molecular weight increases, the solubility decreases. At room temperature, PTMEG has water absorption. Its water absorption depends on the molecular weight, and it can absorb up to 2% of water at most. Dewatering and deoxidation are required before use. The refining device for co-producing tetrahydrofuran copolyether diol and polytetrahydrofuran realizes efficient production through raw material refining, polymerization reaction, and post-treatment steps.

[0003] Reference patent (CN202310074988.5) discloses a preparation system and method for highly homogeneous tetrahydrofuran copolyether diol, including a preparation tank for stirring raw materials of tetrahydrofuran copolyether diol. Ring frames are fixedly installed at the top and bottom of the surface of the preparation tank, and a support plate is fixedly connected between the opposite sides of the ring frames. A preparation stirring mechanism is arranged inside the preparation tank. The preparation stirring mechanism includes a driving motor. The present invention relates to the technical field of alcohol preparation. The preparation system and method for highly homogeneous tetrahydrofuran copolyether diol, by setting up a preparation stirring mechanism, uses the driving motor to provide driving force, and realizes the rotation of the upper rotating shaft and the lower rotating shaft through a meshing component. At the same time, the rotation of the scraping blade is realized through a transmission component, and then the synchronous adjustment of the scraping blade is realized through a chain drive component, thereby realizing the synchronous operation of the preparation mixing operation and the inner wall scraping adjustment, making the raw materials mixed more fully during preparation.

[0004] Based on the above patent, tetrahydrofuran copolyether diol and polytetrahydrofuran are two important chemical raw materials. The preparation process involves the ring-opening polymerization of tetrahydrofuran, followed by copolymerization, and finally the separation and purification of the product. However, usually a single reaction kettle is used in the preparation, which limits the ability to handle different materials or perform different process steps simultaneously, reducing work efficiency. In the material handling stage, traditional preparation systems often lack effective grinding and crushing mechanisms, resulting in uneven particle sizes of the materials entering the reaction kettle, limited reaction contact area, and seriously affecting the reaction rate and efficiency. At the same time, impurities and particles in the materials are also likely to cause local blockages during the reaction process, further reducing the reaction efficiency. During feeding, it is not convenient to perform filtration, and the filter screen of the filtration system is easily blocked by large particles or impurities in the materials, resulting in a decrease in the filtration speed. In the preparation system, material mixing usually relies on a single stirring method, and the up-and-down and self-rotation directions of the reaction kettle are both in a single direction, often leading to uneven material mixing and low reaction efficiency. Therefore, a preparation system and process for co-producing tetrahydrofuran copolyether diol and polytetrahydrofuran are proposed. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a preparation system and process for co-producing tetrahydrofuran copolyether diol and polytetrahydrofuran, which solves the problems that usually a single reaction kettle is used in the preparation, limiting the ability to handle different materials or perform different process steps simultaneously, reducing work efficiency, and in the material handling stage, traditional preparation systems often lack effective grinding and crushing mechanisms, resulting in uneven particle sizes of the materials entering the reaction kettle, limited reaction contact area, and seriously affecting the reaction rate and efficiency. At the same time, impurities and particles in the materials are also likely to cause local blockages during the reaction process, further reducing the reaction efficiency. During feeding, it is not convenient to perform filtration, and the filter screen of the filtration system is easily blocked by large particles or impurities in the materials, resulting in a decrease in the filtration speed. In the preparation system, material mixing usually relies on a single stirring method, and the up-and-down and self-rotation directions of the reaction kettle are both in a single direction, often leading to uneven material mixing and low reaction efficiency.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A preparation system for co-producing tetrahydrofuran copolyether diol and polytetrahydrofuran, including a support base, on which a preparation mechanism for co-producing tetrahydrofuran copolyether diol and polytetrahydrofuran is provided. The preparation mechanism includes:

[0007] A reaction component, including a first reaction kettle and a second reaction kettle fixed on the upper end surface of the support base, and the first reaction kettle and the second reaction kettle are connected through a pipeline component;

[0008] Processing assembly, including a transmission rod penetrating and connecting to the side of a first reaction kettle. One end of the transmission rod inside the first reaction kettle is provided with a first movable rod and a second movable rod connected through a gear assembly. The transmission rod is connected through a reciprocating assembly. The upper end of the first reaction kettle is fixed with a processing housing. The inner wall of the processing housing is provided with a filter screen support connected through an elastic assembly. The top end of the second movable rod is fixed with a support ring. The filter screen support and the support ring are connected through a cam assembly. The inner wall of the processing housing is fixed with a second housing. The lower end of the second housing is provided with a cleaning support connected through a transmission assembly. The upper end of the second housing is provided with a grinding block connected through a rotating assembly.

[0009] Preferably, the pipeline assembly includes a delivery pipe penetrating and connecting to the side of the first reaction kettle. The other end of the delivery pipe is in fluid connection with the second reaction kettle. A group of control valves is arranged inside the upper end of the delivery pipe. The upper end surface of the support base is fixed with a pump body. The output end of the pump body is connected to the delivery pipe.

[0010] Preferably, the reciprocating assembly includes a support frame fixed on the upper end surface of the support base. The side wall of the support frame is fixed with an L-shaped bracket. The transmission rod is located inside the L-shaped bracket and is rotatably connected to the L-shaped bracket. The inner walls of the upper ends of both sides of the support frame are fixed with positioning rods. The outer wall of the positioning rod is slidably connected with a gear rod. A transmission gear is fixed on the outer wall of the transmission rod close to the gear rod. The transmission gear is meshed with the gear rod. Another side wall of the support frame is provided with a chute. Inside the chute is arranged a reciprocating lead screw driven by a motor. The inner wall of the chute is slidably connected with a slider bracket. One end of the slider bracket is fixed to the side wall of the gear rod. The slider bracket is in threaded connection with the reciprocating lead screw.

[0011] Preferably, the gear assembly includes a first housing fixed on the inner wall of the first reaction kettle. One end of the transmission rod extending into the first housing is fixed with a first bevel gear. The second movable rod penetrates and connects to the upper end inside the first housing. One end of the second movable rod close to the first bevel gear is fixed with a third bevel gear. The first bevel gear is meshed with the third bevel gear. The outer wall of the second movable rod is evenly distributed with third stirring rods. Above the third stirring rods on the outer wall of the second movable rod is provided with a second scraper bracket. The first movable rod penetrates and connects to the lower end inside the first housing. One end of the first movable rod close to the first bevel gear is fixed with a second bevel gear. The first bevel gear and the second bevel gear are meshed. The outer wall of the first movable rod is evenly distributed with first stirring rods. Four first scraper brackets are fixed on the outer wall of the first movable rod. The lower end of the first scraper bracket is fixed with a second stirring rod. The first movable rod and the second movable rod are symmetrically distributed with respect to the first housing.

[0012] Preferably, an annular pipe for cleaning is fixed to the inner wall of the first reaction kettle. Nozzles are evenly distributed on the lower inner wall of the annular pipe. A water inlet pipe is fixedly connected to the side of the annular pipe. The water inlet pipe extends to the outside of the first reaction kettle and is used to connect to an external water pipe.

[0013] Preferably, the elastic component includes a pair of fixed rods fixed to the inner wall of the processing shell. A first spring is fixed to the lower end of the fixed rod. The filter screen support is located at the lower end of the first spring. A telescopic sleeve rod is arranged inside the first spring. Both ends of the telescopic sleeve rod are fixedly connected to the filter screen support and the fixed rod respectively. The cam component includes a pair of first cams fixed to the edge of the lower end of the filter screen support. A pair of second cams are fixed to the edge of the upper end surface of the support ring.

[0014] Preferably, the transmission component includes a connecting rod rotatably connected inside the second shell. The connecting rod and the transmission rod are connected by a transmission belt and a transmission wheel. One end of the connecting rod extending into the second shell is fixedly connected to a fourth bevel gear. A fixed column penetrates through the lower end inside the second shell. A second spring is fixed to the lower end of the fixed column. A movable shell is fixed to the lower end of the second spring. The cleaning support is fixedly connected to the side wall of the movable shell. The movable shell is slidably connected to the fixed column. A sixth bevel gear is fixed to one end of the fixed column close to the fourth bevel gear. The sixth bevel gear is meshed with the fourth bevel gear. The fixed column is rotatably connected inside the second shell through a bearing.

[0015] Preferably, the rotating component includes a vertical rod penetrating through the upper end inside the second shell. A fifth bevel gear is fixed to one end of the vertical rod close to the fourth bevel gear. The fourth bevel gear is meshed with the fifth bevel gear. A first conical block is fixed to the upper end of the vertical rod. Three groups of grinding blocks are evenly distributed on the outer wall of the first conical block. A second conical block is fixed to the upper end of the first conical block. A feed shell is fixed to the upper end of the processing shell.

[0016] Preferably, a discharge pipe penetrates through one side of the lower end of the first reaction kettle. The discharge pipe is opened and closed by a valve.

[0017] The present invention also provides a preparation method applicable to the co-production of tetrahydrofuran copolyether diol and polytetrahydrofuran, which is characterized by including the following steps:

[0018] Step 1: First, pass the materials through the inside of the feed shell and the processing shell to grind and filter the materials;

[0019] Step 2: When the ground and filtered materials enter the inside of the first reaction kettle, mix the materials through the stirring rod;

[0020] Step 3: Carry out the ring-opening polymerization reaction of tetrahydrofuran in the first reactor, and convey the intermediate product to the second reactor through the pipeline assembly, and add other comonomers for copolymerization reaction.

[0021] The present invention provides a preparation system and process for co-producing tetrahydrofuran copolyether diol and polytetrahydrofuran. Compared with the prior art, it has the following beneficial effects:

[0022] First, in the preparation system and process for co-producing tetrahydrofuran copolyether diol and polytetrahydrofuran, the vertical rod arranged rotates under the action of the fifth bevel gear and the fourth bevel gear driven by the connecting rod. The rotation of the vertical rod drives the grinding block on the outer wall of the first cone block to rotate in cooperation with the cone groove corresponding to the first cone block inside the processing shell. The rotation of the grinding block grinds and crushes the incoming material, grinding the material into finer particles, increasing the contact area between the materials, making the reaction more sufficient and rapid. At the same time, the fine particles are more easily dispersed evenly in the reaction solution, improving the reaction rate and efficiency, which is beneficial to the subsequent reaction and the generation of products. The first reactor and the second reactor arranged are respectively used for the ring-opening polymerization reaction and copolymerization reaction of tetrahydrofuran, and the reaction conditions can be controlled more precisely, thereby improving the yield and purity of the final product. Using two reactors can allow each reaction to be carried out under the most suitable conditions, thereby optimizing the reaction efficiency and product performance, optimizing for specific reactions, and reducing the interference of unnecessary reactions.

[0023] Second, in the preparation system and process for co-producing tetrahydrofuran copolyether diol and polytetrahydrofuran, when the material enters, it enters the inside of the processing shell through the feed shell. Then, when the second movable rod rotates, it drives the support ring to rotate simultaneously. Then, when the pair of second cams on the support ring contact the first cam at the lower end of the filter screen support, it has an upward pushing effect on the filter screen support. The filter screen support reciprocates and vibrates at the bottom of the fixed rod through the first spring and the telescopic sleeve rod, thereby vibrating and filtering the incoming material, which helps the material to be more evenly distributed on the filter screen, increasing the contact area between the material and the filter screen, thus improving the filtration speed. At the same time, the vibration can also promote the small particles and impurities in the material to pass through the filter screen faster, reducing the filtration time, and the vibration can continuously impact and vibrate the filter screen, shaking off the particles and impurities attached to the filter screen, effectively preventing the blockage of the filter screen. And the cleaning support on the outer wall of the movable shell sweeps on the upper end surface of the filter screen support, effectively cleaning the filter screen, and further preventing the blockage of the filter screen, ensuring the efficient operation of the filtration system.

[0024] Third, in the preparation system and process of the co-production of tetrahydrofuran copolyether glycol and polytetrahydrofuran, a transmission rod is arranged to pass through the interior of the first shell and perform reciprocating rotation work in the interior of the first reactor, and then the first movable rod and the second movable rod are relatively rotated with the first bevel gear through the second bevel gear and the third bevel gear under the action of the transmission rod, respectively driving the first stirring rod and the third stirring rod on the first movable rod and the second movable rod to perform relative rotation work up and down in the first reactor, and the reciprocating rotation of the stirring rod is realized due to the reciprocating rotation of the transmission rod, and the reaction materials can be more fully mixed through the multi-dimensional stirring method to ensure that the reactants Uniform contact accelerates the chemical reaction process, improves reaction efficiency, and efficient mixing helps the reactants to react fully, reduces side reactions or incomplete reactions caused by local excessive or low concentrations, thereby improving the purity and uniformity of the product. The first scraper bracket and the second scraper bracket fixed to the outer walls of the first movable rod and the second movable rod rotate in contact along the inner wall of the first reactor, which can effectively clean the attachments on the inner wall and prevent the material from accumulating on the inner wall during the reaction. The second stirring rod fixed at the lower end of the first scraper bracket rotates at the bottom of the reactor, which can prevent the accumulation of materials at the bottom and ensure that the materials in the entire reactor can fully participate in the reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a cross-sectional structural diagram of the first reaction kettle and the second reaction kettle of the present invention;

[0027] Figure 3 It is a schematic diagram of the driving connection structure of the transmission rod of the present invention;

[0028] Figure 4 It is a schematic structural diagram of the internal cross-section of the first reaction kettle of the present invention;

[0029] Figure 5 Schematic diagram of the transmission structure of the second stirring rod and the third stirring rod of the present invention;

[0030] Figure 6 It is a schematic diagram of the transmission connection structure of the connecting rod and the transmission rod of the present invention;

[0031] Figure 7 It is a schematic diagram of the connection structure between the first cam and the second cam of the present invention;

[0032] Figure 8 This is a schematic diagram of the cross-sectional structure of the processing shell of the present invention;

[0033] Figure 9 For the present invention Figure 8 The enlarged connection structure diagram at A in the middle;

[0034] Figure 10 It is a schematic cross-sectional structure diagram of the feed housing of the present invention;

[0035] Figure 11 It is a schematic overall structure diagram of the annular pipe of the present invention.

[0036] In the figure: 1, support base; 2, first reactor; 201, second reactor; 202, conveying pipe; 203, control valve; 204, pump body; 3, support frame; 301, positioning rod; 302, gear rod; 303, L-shaped bracket; 304, transmission rod; 305, transmission gear; 306, chute; 307, slider bracket; 308, reciprocating screw rod; 4, processing housing; 401, feed housing; 5, first housing; 501, first bevel gear; 502, first movable rod; 503, second bevel gear; 504, first stirring rod; 505, first scraper bracket; 506, second stirring rod; 6, second movable rod; 601, third bevel gear; 602, third stirring rod; 603, second scraper bracket; 7, connecting rod; 701, second housing; 702, fourth bevel gear; 703, vertical rod; 704, fifth bevel gear; 705, sixth bevel gear; 8, fixed rod; 801, first spring; 802, telescopic sleeve rod; 803, filter screen bracket; 804, first cam; 805, support ring; 806, second cam; 9, fixed column; 901, second spring; 902, movable housing; 903, cleaning bracket; 10, first cone block; 1001, grinding block; 1002, second cone block; 11, annular pipe; 1101, nozzle; 1102, water inlet pipe; 12, discharge pipe. Specific embodiments

[0037] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] Please refer to Figures 1 to 11 , the present invention provides the following two technical solutions

[0039] Embodiment 1:

[0040] A preparation system for co-producing tetrahydrofuran copolyether diol and polytetrahydrofuran, including a support base 1, and a preparation mechanism for co-producing tetrahydrofuran copolyether diol and polytetrahydrofuran is provided on the support base 1. The preparation mechanism includes:

[0041] The reaction component includes a first reactor 2 and a second reactor 201 fixed to the upper end face of a support base 1, and the first reactor 2 and the second reactor 201 are connected by a pipeline component;

[0042] The processing component includes a transmission rod 304 penetrating and connecting to the side of the first reactor 2. One end of the transmission rod 304 inside the first reactor 2 is provided with a first movable rod 502 and a second movable rod 6 connected by a gear component. The transmission rod 304 is driven and connected by a reciprocating component. The upper end of the first reactor 2 is fixed with a processing housing 4. The inner wall of the processing housing 4 is provided with a filter screen support 803 connected by an elastic component. The top end of the second movable rod 6 is fixed with a support ring 805. The filter screen support 803 and the support ring 805 are connected by a cam component. The inner wall of the processing housing 4 is fixed with a second housing 701. The lower end of the second housing 701 is provided with a cleaning support 903 connected by a transmission component. The upper end of the second housing 701 is provided with a grinding block 1001 connected by a rotating component.

[0043] In the embodiment of the present invention, the pipeline component includes a delivery pipe 202 penetrating and connecting to the side of the first reactor 2. The other end of the delivery pipe 202 is in a flow-through connection with the second reactor 201. A group of control valves 203 are arranged inside the upper end of the delivery pipe 202. The pump body 204 is fixed to the upper end face of the support base 1. The output end of the pump body 204 is connected to the delivery pipe 202. The provided first reactor 2 and second reactor 201 are respectively used for the ring-opening polymerization reaction and copolymerization reaction of tetrahydrofuran, which can more precisely control the reaction conditions, thereby improving the yield and purity of the final product. Using two reactors allows each reaction to be carried out under the most suitable conditions, thereby optimizing the reaction efficiency and product performance, optimizing for specific reactions, reducing the interference of unnecessary reactions, and then connecting the two reactors through the delivery pipe 202 and the pump body 204, which can realize the rapid and continuous transportation of materials between the two reactors without manual intervention or additional transfer equipment, thereby improving the overall efficiency of the production line. The product in the first reactor 2 is transported to the second reactor 201 through the delivery pipe 202 for further copolymerization reaction, allowing the materials to be recycled between the reactors, improving the utilization rate of raw materials. The control valves 203 arranged on the delivery pipe 202 can control the flow rate and velocity of the materials, enabling the operator to adjust the material ratio and reaction progress in the two reactors according to needs, thereby optimizing the reaction conditions and improving the product quality. The design makes the entire preparation system more compact and integrated, and the connection between each component is more stable and reliable, thereby improving the stability and operation safety of the system.

[0044] In an embodiment of the present invention, the reciprocating assembly includes a support frame 3 fixed to the upper end surface of a support base 1. An L-shaped bracket 303 is fixed to the side wall of the support frame 3. A transmission rod 304 is located inside the L-shaped bracket 303, and the transmission rod 304 is rotatably connected to the L-shaped bracket 303. Positioning rods 301 are fixed to the inner walls of the two upper sides of the support frame 3. A gear rod 302 is slidably connected to the outer wall of the positioning rod 301. A transmission gear 305 is fixed to the outer wall of the transmission rod 304 close to the gear rod 302, and the transmission gear 305 is meshed with the gear rod 302. A chute 306 is formed in the other side wall of the support frame 3. A reciprocating lead screw 308 driven by a motor is arranged inside the chute 306. A slider bracket 307 is slidably connected to the inner wall of the chute 306. One end of the slider bracket 307 is fixedly connected to the side wall of the gear rod 302, and the slider bracket 307 is threadedly connected to the reciprocating lead screw 308. The arranged reciprocating lead screw 308 is driven by a motor to work, so that the slider bracket 307 slides along the chute 306 on the side wall of the support frame 3 through the reciprocating lead screw 308. The slider bracket 307 drives the gear rod 302 to slide along the positioning rod 301 on the upper end surface of the support frame 3, and the gear rod 302 is meshed with the transmission gear 305. When the gear rod 302 reciprocates along the positioning rod 301, the transmission rod 304 is made to rotate reciprocally on the L-shaped bracket 303.

[0045] In the embodiment of the present invention, the gear assembly includes a first shell 5 fixed to the inner wall of the first reaction kettle 2, a transmission rod 304 extends to the first shell 5, one end of which is fixed with a first bevel gear 501, a second movable rod 6 is located inside the upper end of the first shell 5 and is connected through, a third bevel gear 601 is fixed to one end of the second movable rod 6 close to the first bevel gear 501, the first bevel gear 501 is meshed with the third bevel gear 601, the outer wall of the second movable rod 6 is evenly distributed with third stirring rods 602, the outer wall of the second movable rod 6 is located above the third stirring rod 602 and is provided with a second scraper bracket 603, the first movable rod 502 is located in the first shell 5 The first movable rod 502 is connected with the second bevel gear 503 at one end thereof near the first bevel gear 501, and the first bevel gear 501 and the second bevel gear 503 are meshedly connected. The outer wall of the first movable rod 502 is evenly distributed with first stirring rods 504, and the outer wall of the first movable rod 502 is fixed with four groups of first scraper brackets 505, and the lower end of the first scraper bracket 505 is fixed with a second stirring rod 506. The first movable rod 502 and the second movable rod 6 are symmetrically distributed about the first shell 5, and the transmission rod 304 is arranged to pass through the interior of the first shell 5 and perform reciprocating rotation in the interior of the first reactor 2, and then Afterwards, the first movable rod 502 and the second movable rod 6 rotate relative to the first bevel gear 501 through the second bevel gear 503 and the third bevel gear 601 under the action of the transmission rod 304, respectively driving the first stirring rod 504 and the third stirring rod 602 on the first movable rod 502 and the second movable rod 6 to rotate relative to each other up and down inside the first reactor 2, and the reciprocating rotation of the transmission rod 304 realizes the reciprocating rotation of the stirring rod, and the multi-dimensional stirring method can more fully mix the reaction materials to ensure uniform contact of the reactants, thereby accelerating the chemical reaction process, improving the reaction efficiency, and high Effective mixing helps the reactants to react fully, reduces side reactions or incomplete reactions caused by local excessively high or low concentrations, and thus improves the purity and uniformity of the product. The first scraper bracket 505 and the second scraper bracket 603 fixed to the outer walls of the first movable rod 502 and the second movable rod 6 rotate along the inner wall of the first reactor 2, which can effectively clean the attachments on the inner wall and prevent the material from accumulating on the inner wall during the reaction. The second stirring rod 506 fixed at the lower end of the first scraper bracket 505 rotates at the bottom of the reactor, which can prevent the accumulation of materials at the bottom and ensure that the materials in the entire reactor can fully participate in the reaction.

[0046] In an embodiment of the present invention, an annular pipe 11 for cleaning is fixed to the inner wall of the first reactor 2. Nozzles 1101 are evenly distributed on the inner wall of the lower end of the annular pipe 11. A water inlet pipe 1102 is fixedly connected to the side of the annular pipe 11. The water inlet pipe 1102 extends to the outside of the first reactor 2, and the water inlet pipe 1102 is used to connect to an external water pipe. The provided water inlet pipe 1102 is used to connect to an external water pipe, and then the water source enters the inside of the annular pipe 11 and is sprayed out through the nozzles 1101, thereby flushing the inner wall of the reactor. By regularly flushing the inner wall of the reactor, corrosion and wear caused by long-term accumulation of attachments can be prevented, the service life of the equipment can be extended, and it is more efficient and convenient than manual cleaning, reducing the complexity and labor intensity of the cleaning work.

[0047] Embodiment 2. The technical solution of this embodiment different from that of Embodiment 1 includes: In an embodiment of the present invention, the elastic component includes a pair of fixed rods 8 fixed to the inner wall of the processing housing 4. A first spring 801 is fixed to the lower end of the fixed rod 8. The filter screen support 803 is located at the lower end of the first spring 801. A telescopic sleeve rod 802 is arranged inside the first spring 801. Both ends of the telescopic sleeve rod 802 are fixedly connected to the filter screen support 803 and the fixed rod 8 respectively. The cam component includes a pair of first cams 804 fixed to the edge of the lower end of the filter screen support 803. A pair of second cams 806 are fixed to the edge of the upper end surface of the support ring 805. When the material enters, it enters the inside of the processing housing 4 through the feeding housing 401. Then when the second movable rod 6 rotates, it drives the support ring 805 to rotate at the same time. Then when the pair of second cams 806 on the support ring 805 contact the first cams 804 at the lower end of the filter screen support 803, a pushing force upward on the filter screen support 803 is generated. The filter screen support 803 reciprocates and vibrates at the bottom of the fixed rod 8 through the first spring 801 and the telescopic sleeve rod 802, thereby performing a vibrating filtration operation on the incoming material, which helps the material to be more evenly distributed on the filter screen, increases the contact area between the material and the filter screen, thereby improving the filtration speed. At the same time, the vibration can also promote the small particles and impurities in the material to pass through the filter screen faster, reducing the filtration time, and the vibration can continuously impact and vibrate the filter screen, shaking off the particles and impurities attached to the filter screen, effectively preventing the blockage of the filter screen.

[0048] In an embodiment of the present invention, the transmission assembly includes a connecting rod 7 rotatably connected inside a second housing 701. The connecting rod 7 and a transmission rod 304 are connected by a transmission belt and transmission wheels. One end of the connecting rod 7 extending into the second housing 701 is fixedly connected with a fourth bevel gear 702. A fixed column 9 penetrates and is connected to the lower end inside the second housing 701. A second spring 901 is fixed to the lower end of the fixed column 9, and a movable housing 902 is fixed to the lower end of the second spring 901. A cleaning bracket 903 is fixedly connected to the side wall of the movable housing 902. The movable housing 902 is slidably connected to the fixed column 9. A sixth bevel gear 705 is fixed to one end of the fixed column 9 close to the fourth bevel gear 702. The sixth bevel gear 705 is meshed with the fourth bevel gear 702. The fixed column 9 is rotatably connected inside the second housing 701 through a bearing. The provided connecting rod 7 and transmission rod 304 are connected by a transmission belt and transmission wheels, as Figure 6 shown, which belongs to the prior art and will not be elaborated much. When the connecting rod 7 is rotating, the fixed column 9 rotates inside the second housing 701 under the meshing of the sixth bevel gear 705 and the fourth bevel gear 702. The outer wall of the fixed column 9 is gear-shaped and can slide vertically with the movable housing 902, driving the cleaning bracket 903 on the outer wall of the movable housing 902 to sweep on the upper end surface of the filter screen bracket 803, effectively cleaning the filter screen and further preventing the filter screen from being blocked, ensuring the efficient operation of the filtering system. The movable housing 902 is elastically connected to the fixed column 9 through the second spring 901, which is used to ensure that when the filter screen bracket 803 shakes, the cleaning bracket 903 is compressed by the second spring 901, ensuring better contact between the filter screen bracket 803 and the cleaning bracket 903.

[0049] In an embodiment of the present invention, the rotating assembly includes a vertical rod 703 penetrating through the upper end inside the second outer shell 701. A fifth bevel gear 704 is fixed to one end of the vertical rod 703 close to the fourth bevel gear 702. The fourth bevel gear 702 is meshed with the fifth bevel gear 704. A first conical block 10 is fixed to the upper end of the vertical rod 703. Three groups of grinding blocks 1001 are evenly distributed on the outer wall of the first conical block 10. A second conical block 1002 is fixed to the upper end of the first conical block 10. A feed outer shell 401 is fixed to the upper end of the processing outer shell 4. The provided vertical rod 703 rotates under the action of the connecting rod 7 through the fifth bevel gear 704 and the fourth bevel gear 702. The rotation of the vertical rod 703 drives the grinding blocks 1001 on the outer wall of the first conical block 10 to rotate in cooperation with the conical grooves corresponding to the first conical block 10 inside the processing outer shell 4. The rotation of the grinding blocks 1001 grinds and crushes the incoming material, grinding the material into finer particles, increasing the contact area between the materials, making the reaction more sufficient and rapid. At the same time, the fine particles are more easily dispersed evenly in the reaction liquid, improving the reaction rate and efficiency, being beneficial to the subsequent reaction and the generation of products. Moreover, the material can better contact the inside of the conical grooves ground by the grinding blocks 1001 through the second conical block 1002 facing upward of the cone.

[0050] In an embodiment of the present invention, a discharge pipe 12 penetrates through one side of the lower end of the first reaction kettle 2. The discharge pipe 12 is opened and closed by a valve, and is used for discharging the material and discharging the cleaning waste liquid after cleaning.

[0051] A preparation method for co-producing tetrahydrofuran copolyether diol and polytetrahydrofuran, characterized by comprising the following steps:

[0052] Step 1: First, pass the material through the inside of the feeding housing 401 and the processing housing 4 for grinding and filtering of the material. The specific operation is as follows: The set vertical rod 703 rotates under the action of the fifth bevel gear 704 and the fourth bevel gear 702 through the connecting rod 7. The rotation of the vertical rod 703 drives the grinding block 1001 on the outer wall of the first cone block 10 to rotate in cooperation with the cone groove corresponding to the first cone block 10 inside the processing housing 4. The rotation of the grinding block 1001 grinds and crushes the incoming material, making the material grind into finer particles, increasing the contact area between the materials, and making the reaction more sufficient and rapid. Then, when the second movable rod 6 rotates, it simultaneously drives the support ring 805 to rotate. When a pair of second cams 806 on the support ring 805 contact the first cam 804 at the lower end of the filter screen support 803, it exerts an upward pushing force on the filter screen support 803. The filter screen support 803 reciprocates and vibrates at the bottom of the fixed rod 8 through the first spring 801 and the telescopic sleeve rod 802, thereby performing a vibrating filtration operation on the incoming material, which helps the material to be more evenly distributed on the filter screen, increases the contact area between the material and the filter screen, and thus improves the filtration speed. At the same time, the vibration can also promote the small particles and impurities in the material to pass through the filter screen faster, reducing the filtration time, and the vibration can continuously impact and vibrate the filter screen, shaking off the particles and impurities adhering to the filter screen, effectively preventing the blockage of the filter screen. And when the connecting rod 7 is rotating, the fixed column 9 rotates inside the second housing 701 under the meshing of the sixth bevel gear 705 and the fourth bevel gear 702. The outer wall of the fixed column 9 is gear-shaped and can slide vertically with the movable housing 902, driving the cleaning bracket 903 on the outer wall of the movable housing 902 to sweep on the upper end surface of the filter screen support 803, effectively cleaning the filter screen and further preventing the blockage of the filter screen, ensuring the efficient operation of the filtration system. And the movable housing 902 is elastically connected to the fixed column 9 through the second spring 901, which is used to ensure that when the filter screen support 803 vibrates, the cleaning bracket 903 is compressed through the second spring 901, ensuring better contact between the filter screen support 803 and the cleaning bracket 903;

[0053] Step 2: When the ground and filtered materials enter the first reactor 2, the materials are mixed by the stirring rod. Specifically, the reciprocating screw 308 is driven by the motor to realize that the slider bracket 307 slides along the slide groove 306 on the side wall of the support frame 3 through the reciprocating screw 308. The slider bracket 307 drives the gear rod 302 to slide along the positioning rod 301 on the upper end surface of the support frame 3, and the gear rod 302 is meshed with the transmission gear 305. When the gear rod 302 slides back and forth along the positioning rod 301, During operation, the transmission rod 304 is rotated back and forth on the L-shaped bracket 303, and then the transmission rod 304 passes through the first housing 5 to rotate back and forth in the first reactor 2, and then the first movable rod 502 and the second movable rod 6 rotate relative to the first bevel gear 501 through the second bevel gear 503 and the third bevel gear 601 under the action of the transmission rod 304, respectively driving the first stirring rod 504 and the third stirring rod 602 on the first movable rod 502 and the second movable rod 6 to rotate in the first reactor 2. The upper and lower parts of the reactor 2 rotate relative to each other, and the reciprocating rotation of the transmission rod 304 realizes the reciprocating rotation of the stirring rod. The multi-dimensional stirring method can more fully mix the reaction materials and ensure the uniform contact of the reactants, thereby accelerating the chemical reaction process and improving the reaction efficiency. The first scraper bracket 505 and the second scraper bracket 603 fixed on the outer wall of the first movable rod 502 and the second movable rod 6 rotate along the inner wall of the first reactor 2, which can effectively clean the attachments on the inner wall and prevent the materials from accumulating on the inner wall during the reaction. The second stirring rod 506 fixed at the lower end of the first scraper bracket 505 rotates at the bottom of the reactor to prevent the accumulation of materials at the bottom and ensure that the materials in the entire reactor can fully participate in the reaction. The water inlet pipe 1102 is finally provided for connecting to an external water pipe, and then the water source enters the inside of the annular pipe 11 and is sprayed out through the nozzle 1101, thereby flushing the inner wall of the reactor. Regular flushing of the inner wall of the reactor can prevent corrosion and wear caused by long-term accumulation of attachments, thereby extending the service life of the equipment.

[0054] Step 3: Carry out the ring-opening polymerization reaction of tetrahydrofuran in the first reactor 2. Transport the intermediate product to the second reactor 201 through the pipeline assembly, and add other comonomers for copolymerization reaction. The first reactor 2 and the second reactor 201 are respectively used for the ring-opening polymerization reaction of tetrahydrofuran and the copolymerization reaction, which can more precisely control the reaction conditions, thereby improving the yield and purity of the final product. Using two reactors allows each reaction to proceed under the most suitable conditions, thus optimizing the reaction efficiency and product performance, optimizing for specific reactions, reducing the interference of unnecessary reactions. Then, connect the two reactors through the transfer pipe 202 and the pump 204, which can achieve rapid and continuous transportation of materials between the two reactors without manual intervention or additional transfer equipment, thereby improving the overall efficiency of the production line. Transport the product in the first reactor 2 to the second reactor 201 through the transfer pipe 202 for further copolymerization reaction, allowing the materials to be recycled between the reactors, improving the utilization rate of raw materials. The control valve 203 provided on the transfer pipe 202 can control the flow rate and velocity of the materials, enabling the operator to adjust the material ratio and reaction progress in the two reactors as needed. Add tetrahydrofuran, catalyst and other necessary reaction raw materials to the first reactor 2 in a certain proportion, carry out the ring-opening polymerization reaction of tetrahydrofuran in the first reactor 2, transport the intermediate product to the second reactor 2 through the pipeline assembly, and add other comonomers for copolymerization reaction.

[0055] Working principle: First, the material is passed through the inside of the feeding housing 401 and the processing housing 4 for grinding and filtering of the material. Specifically, the set vertical rod 703 rotates under the action of the fifth bevel gear 704 and the fourth bevel gear 702 through the connecting rod 7. The rotation of the vertical rod 703 drives the grinding block 1001 on the outer wall of the first cone block 10 to rotate in cooperation with the cone groove corresponding to the first cone block 10 inside the processing housing 4. The rotation of the grinding block 1001 grinds and crushes the incoming material, making the material ground into finer particles, increasing the contact area between the materials, and making the reaction more sufficient and rapid. Then, when the second movable rod 6 rotates, it simultaneously drives the support ring 805 to rotate. When a pair of second cams 806 on the support ring 805 contact the first cam 804 at the lower end of the filter screen support 803, it exerts an upward pushing force on the filter screen support 803. The filter screen support 803 reciprocates and vibrates at the bottom of the fixed rod 8 through the first spring 801 and the telescopic sleeve rod 802, thereby performing a shaking and filtering operation on the incoming material, which helps the material to be more evenly distributed on the filter screen, increases the contact area between the material and the filter screen, and thus improves the filtering speed. At the same time, the shaking can also promote the small particles and impurities in the material to pass through the filter screen faster, reducing the filtering time. Moreover, the shaking can continuously impact and vibrate the filter screen, shaking off the particles and impurities attached to the filter screen, effectively preventing the blockage of the filter screen. And when the connecting rod 7 is rotating, the fixed column 9 rotates inside the second housing 701 under the meshing of the sixth bevel gear 705 and the fourth bevel gear 702. The outer wall of the fixed column 9 is in the shape of a gear and can slide vertically with the movable housing 902, driving the cleaning bracket 903 on the outer wall of the movable housing 902 to sweep on the upper end surface of the filter screen support 803, effectively cleaning the filter screen and further preventing the blockage of the filter screen, ensuring the efficient operation of the filtering system. And the movable housing 902 is elastically connected to the fixed column 9 through the second spring 901, which is used to ensure that when the filter screen support 803 shakes, the cleaning bracket 903 is compressed through the second spring 901, ensuring better contact between the filter screen support 803 and the cleaning bracket 903;

[0056] Then the reciprocating lead screw 308 set is driven by a motor to work, enabling the slider bracket 307 to slide along the chute 306 on the side wall of the support frame 3 through the reciprocating lead screw 308. The slider bracket 307 drives the gear rod 302 to slide along the positioning rod 301 on the upper end surface of the support frame 3, and the gear rod 302 is meshed with the transmission gear 305. When the gear rod 302 slides reciprocally along the positioning rod 301, it enables the transmission rod 304 to rotate reciprocally on the L-shaped bracket 303. Then the set transmission rod 304 passes through the inside of the first housing 5 and rotates reciprocally inside the first reaction kettle 2. Then the first movable rod 502 and the second movable rod 6 rotate relatively under the action of the first bevel gear 501 through the second bevel gear 503 and the third bevel gear 601, respectively driving the first stirring rod 504 and the third stirring rod 602 on the first movable rod 502 and the second movable rod 6 to rotate relatively above and below inside the first reaction kettle 2. Moreover, due to the reciprocating rotation of the transmission rod 304, the reciprocating rotation of the stirring rod is realized. Through the multi-dimensional stirring method, the reaction materials can be mixed more fully, ensuring uniform contact of the reactants, thereby accelerating the chemical reaction process.

[0057] Meanwhile, the content not detailedly described in this specification belongs to the prior art well-known to those skilled in the art.

[0058] 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 sequence 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 including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device.

[0059] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A system for co-producing tetrahydrofuran copolyether glycol and polytetrahydrofuran, comprising a support base (1), characterized in that: The support base (1) is provided with a preparation mechanism for co-producing tetrahydrofuran copolyether glycol and polytetrahydrofuran, the preparation mechanism comprising: A reaction assembly, comprising a support base (1) on which a first reaction kettle (2) and a second reaction kettle (201) are fixed on the upper end surface, wherein the first reaction kettle (2) and the second reaction kettle (201) are connected via a pipeline assembly; A processing assembly comprises a transmission rod (304) penetrating through the side of a first reaction kettle (2); one end of the transmission rod (304) located inside the first reaction kettle (2) is provided with a first movable rod (502) and a second movable rod (6) connected by a gear assembly; the transmission rod (304) is connected by a reciprocating assembly; a processing shell (4) is fixed to the upper end of the first reaction kettle (2); a filter bracket (803) connected by an elastic assembly is provided on the inner wall of the processing shell (4); a support ring (805) is fixed to the top end of the second movable rod (6); the filter bracket (803) and the support ring (805) are connected by a cam assembly; a second shell (701) is fixed to the inner wall of the processing shell (4); a cleaning bracket (903) connected by a transmission assembly is provided at the lower end of the second shell (701); and a grinding block (1001) connected by a rotating assembly is provided at the upper end of the second shell (701).

2. A system for preparing co-production of tetrahydrofuran copolyether glycol and polytetrahydrofuran according to claim 1, characterized in that: The pipeline assembly comprises a delivery pipe (202) penetrating and connected to the side of the first reaction kettle (2); the other end of the delivery pipe (202) is fluidly connected to the second reaction kettle (201); a group of control valves (203) are arranged inside the upper end of the delivery pipe (202); a pump body (204) is fixed to the upper end surface of the support base (1); and the output end of the pump body (204) is connected to the delivery pipe (202).

3. A system for co-producing tetrahydrofuran copolyether glycol and polytetrahydrofuran according to claim 1, characterized in that: The reciprocating assembly comprises a support frame (3) fixed to the upper end surface of the support base (1), an L-shaped bracket (303) is fixed to the side wall of the support frame (3), the transmission rod (304) is located inside the L-shaped bracket (303), and the transmission rod (304) is rotatably connected to the L-shaped bracket (303), positioning rods (301) are fixed to the inner walls of both sides of the upper end of the support frame (3), the outer wall of the positioning rod (301) is slidably connected to the gear rod (302), and the transmission rod (304) is close to the outer wall of the gear rod (302). A transmission gear (305) is fixed thereto, and the transmission gear (305) is meshingly connected to the gear rod (302); a slide groove (306) is provided on the other side wall of the support frame (3); a reciprocating screw rod (308) driven by a motor is arranged inside the slide groove (306); a slider bracket (307) is slidably connected to the inner wall of the slide groove (306); one end of the slider bracket (307) is fixedly connected to the side wall of the gear rod (302); and the slider bracket (307) is threadedly connected to the reciprocating screw rod (308).

4. A system for preparing co-production of tetrahydrofuran copolyether glycol and polytetrahydrofuran according to claim 1, characterized in that: The gear assembly comprises a first housing (5) fixed to the inner wall of the first reaction kettle (2); the transmission rod (304) extends into the first housing (5) and has a first bevel gear (501) fixed at one end thereof; the second movable rod (6) is located inside the upper end of the first housing (5) and is connected thereto; a third bevel gear (601) is fixed at one end of the second movable rod (6) close to the first bevel gear (501); the first bevel gear (501) and the third bevel gear (601) are meshingly connected; third stirring rods (602) are evenly distributed on the outer wall of the second movable rod (6); and a second scraper bracket (603) is arranged on the outer wall of the second movable rod (6) above the third stirring rod (602). ), the first movable rod (502) is located at the lower end of the interior of the first shell (5) and is connected through it, a second bevel gear (503) is fixed to one end of the first movable rod (502) close to the first bevel gear (501), the first bevel gear (501) and the second bevel gear (503) are meshingly connected, the outer wall of the first movable rod (502) is evenly distributed with first stirring rods (504), the outer wall of the first movable rod (502) is fixed with four groups of first scraper brackets (505), the lower end of the first scraper bracket (505) is fixed with a second stirring rod (506), and the first movable rod (502) and the second movable rod (6) are symmetrically distributed with respect to the first shell (5).

5. A system for preparing co-production of tetrahydrofuran copolyether glycol and polytetrahydrofuran according to claim 1, characterized in that: An annular tube (11) for cleaning is fixed to the inner wall of the first reaction kettle (2); nozzles (1101) are evenly distributed on the inner wall of the lower end of the annular tube (11); a water inlet pipe (1102) is fixedly connected to the side of the annular tube (11); the water inlet pipe (1102) extends to the outside of the first reaction kettle (2), and the water inlet pipe (1102) is used for connecting to an external water pipe.

6. A system for co-producing tetrahydrofuran copolyether glycol and polytetrahydrofuran according to claim 1, characterized in that: The elastic component comprises a pair of fixed rods (8) fixed to the inner wall of the processing shell (4); a first spring (801) is fixed to the lower end of the fixed rod (8); the filter bracket (803) is located at the lower end of the first spring (801); a telescopic sleeve rod (802) is provided on the inner ring of the first spring (801); two ends of the telescopic sleeve rod (802) are respectively fixedly connected to the filter bracket (803) and the fixed rod (8); the cam component comprises a pair of first cams (804) fixed at the lower end edge of the filter bracket (803); and a pair of second cams (806) are fixed at the upper end surface edge of the support ring (805).

7. A system for preparing co-production of tetrahydrofuran copolyether glycol and polytetrahydrofuran according to claim 1, characterized in that: The transmission assembly comprises a connecting rod (7) rotatably connected inside the second housing (701); the connecting rod (7) and the transmission rod (304) are connected in transmission via a transmission belt and a transmission wheel; the connecting rod (7) extends into the second housing (701) and one end is fixedly connected to a fourth bevel gear (702); a fixing column (9) is passed through the lower end of the interior of the second housing (701); a second spring (901) is fixed to the lower end of the fixing column (9); a movable housing (902) is fixed to the lower end of the second spring (901); the cleaning bracket (903) is fixedly connected to the side wall of the movable housing (902); the movable housing (902) is slidably connected to the fixing column (9); a sixth bevel gear (705) is fixed to one end of the fixing column (9) close to the fourth bevel gear (702); the sixth bevel gear (705) is meshedly connected to the fourth bevel gear (702); and the fixing column (9) is rotatably connected to the interior of the second housing (701) via a bearing.

8. A system for co-producing tetrahydrofuran copolyether glycol and polytetrahydrofuran according to claim 1, characterized in that: The rotating assembly includes a vertical rod (703) passing through the upper end of the second shell (701), a fifth bevel gear (704) is fixed to one end of the vertical rod (703) close to the fourth bevel gear (702), the fourth bevel gear (702) and the fifth bevel gear (704) are meshingly connected, a first cone block (10) is fixed to the upper end of the vertical rod (703), three groups of grinding blocks (1001) are evenly distributed on the outer wall of the first cone block (10), a second cone block (1002) is fixed to the upper end of the first cone block (10), and a feed shell (401) is fixed to the upper end of the processing shell (4).

9. A system for preparing co-production of tetrahydrofuran copolyether glycol and polytetrahydrofuran according to claim 1, characterized in that: A discharge pipe (12) is connected through one side of the lower end of the first reaction kettle (2), and the discharge pipe (12) is opened and closed by a valve.

10. A method for preparing a co-production of tetrahydrofuran copolyether glycol and polytetrahydrofuran according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: First, the material is passed through the inside of the feed housing (401) and the processing housing (4) to grind and filter the material; Step 2: When the ground and filtered materials enter the first reaction kettle (2), the materials are mixed by a stirring rod; Step 3: Carry out a ring-opening polymerization reaction of tetrahydrofuran in the first reactor (2), transport the intermediate product to the second reactor (201) through a pipeline assembly, and add other comonomers to carry out copolymerization reaction.

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