Byproduct recycling system and purification process for preparing tetrahydrofuran copolyether glycol

Abstract

The invention relates to the technical field of tetrahydrofuran copolyether glycol, in particular to a tetrahydrofuran copolyether glycol preparation by-product recycling system and a purification process. The tetrahydrofuran copolyether glycol preparation by-product recycling system comprises a discharging control mechanism, a catalyst quantitative discharging mechanism is arranged on the front side of the discharging control mechanism, and the discharging control mechanism comprises a material storage table; by arranging the discharging control mechanism and the catalyst quantitative discharging mechanism, automatic mixing and intermittent conveying of by-products and catalysts are achieved, the reaction efficiency is improved, the purification quality of the by-products is remarkably improved, and the yield of the by-products is improved. By means of the well-designed mechanical transmission device and control system, the mixing proportion and conveying time of the by-product and the catalyst can be accurately controlled, so that the stability and reliability of the whole purification process are ensured, in addition, the system is compact in structure and easy and convenient to operate, and the production cost is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of tetrahydrofuran copolyether glycol, and more particularly to a by-product recovery and utilization system and a purification process for preparing tetrahydrofuran copolyether glycol. Background Art

[0002] Tetrahydrofuran copolyether glycol is a polymer compound produced by the polymerization of tetrahydrofuran and an initiator. It exhibits excellent low-temperature performance, hydrolysis resistance, and oxidation resistance, and is widely used in polyurethane elastomers, polyurethane foams, lubricants, surfactants, and coatings. The production of byproducts is unavoidable during the production process, and these byproducts often contain valuable chemical components. Therefore, recycling these byproducts and obtaining high-quality tetrahydrofuran copolyether glycol through purification processes is of great significance for improving resource utilization and environmental protection.

[0003] According to patent document: CN1440437A, a method for preparing polytetrahydrofuran and / or tetrahydrofuran copolymers with an average molecular weight of 650-5000 daltons in one step by polymerizing tetrahydrofuran over a heterogeneous acid catalyst in the presence of at least one telogen and / or comonomer selected from α,ω-diol, water, polytetrahydrofuran with a molecular weight of 200-700 daltons and / or cyclic ether is disclosed, characterized in that a) suspended and / or dissolved catalyst components and / or catalyst contained in the polymer product are removed; b) fractionating the obtained catalyst-free polymer product in at least one distillation step to obtain a distillation residue containing the polymer product and at least one tetrahydrofuran fraction, and returning at least a portion of the tetrahydrofuran fraction to the polymerization reaction, and c) removing low molecular weight polytetrahydrofuran and / or tetrahydrofuran copolymers having an average molecular weight of 200 to 700 daltons from the distillation residue of post-treatment step b) to obtain polytetrahydrofuran and / or tetrahydrofuran copolymers having an average molecular weight of 650 to 5000 daltons.

[0004] In the process of synthesizing tetrahydrofuran copolyether glycol, the generation of by-products is inevitable. These by-products are mainly low molecular weight cyclic compounds. Specifically, tetrahydrofuran may undergo intramolecular cyclization during the polymerization reaction, leading to the formation of cyclic oligomers such as tetrahydrofuran dimers or higher polymers. In addition, when the comonomer is ethylene oxide or propylene oxide, other cyclic ether compounds such as 1,4-dioxane and methyl dioxolane as well as catalyst-related by-products may be produced in the reaction system. The use of halogen-containing catalysts such as boron trichloride and tin tetrachloride may lead to the generation of halogenated by-products. These by-products are difficult to separate from the pure product and may affect the product. The performance is negatively affected. If alcohols are used as initiators, the alcohol hydroxyl groups may react with the catalyst to form ester by-products. These cyclic oligomers (such as THF dimers) can be re-ringed under acidic catalysts (such as heteropoly acids) and suitable temperatures (40-60°C) and participate in copolymerization reactions to be converted into target copolyether diol segments. However, during the conversion process, the by-products are usually poured directly into the conversion kettle, and then the catalyst and other chemical reagents required for the copolymerization reaction are added. This operation method cannot ensure that the pre-entered by-products are fully mixed with the reactants, which may result in some by-products not being completely converted and remaining in the reaction system, thereby affecting the purity of the final product. Summary of the Invention

[0005] To overcome the above-mentioned deficiencies of the prior art, the present invention provides a by-product recovery and utilization system and purification process for preparing tetrahydrofuran copolyether glycol. The technical problem to be solved by the present invention is that during the conversion process, the by-products are usually poured directly into a conversion kettle, and then a catalyst and other chemical reagents required for the copolymerization reaction are added. This operation method cannot ensure that the pre-introduced by-products are fully mixed with the reactants, which may result in some by-products not being completely converted and remaining in the reaction system, thereby affecting the purity of the final product.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A by-product recovery and utilization system for preparing tetrahydrofuran copolyether glycol comprises a feeding control mechanism, wherein a catalyst quantitative feeding mechanism is provided on the front side of the feeding control mechanism;

[0008] The material unloading control mechanism includes a material storage platform, and a material unloading component is provided on the front side of the material storage platform;

[0009] The catalyst quantitative feeding mechanism includes two side connecting rods, the inner rear sides of the two side connecting rods are fixedly connected to the reaction tank connecting plate, and the inner wall of the reaction tank connecting plate is fixedly connected to the reaction tank.

[0010] As a further solution of the present invention: the material storage platform includes a material storage box connecting block, the bottom of the material storage box connecting block is fixedly connected to an inverted U-shaped support plate, the left and right sides of the rear side of the inverted U-shaped support plate are fixedly connected to a triangular support frame, the rear side of the material storage box connecting block is fixedly connected to the material storage box, the front side of the outer wall of the material storage box is fixedly connected to a material passing pipe, the front end of the material passing pipe is fixedly connected to a discharge box, both sides of the outer wall of the discharge box are fixedly connected to the discharge box connecting plate, the left and right sides of the two discharge box connecting plates are fixedly connected to side panels, the outer ends of the two groups of side panels are fixedly connected to columnar connecting rods, and the outer ends of the two groups of columnar connecting rods are fixedly connected to L-shaped side panels.

[0011] As a further solution of the present invention: the unloading assembly includes two supporting uprights, the tops of the two supporting uprights are fixedly connected with connecting cross bars, the inner middle parts of the two supporting uprights are fixedly connected with cylindrical blocking column connecting plates, the inner walls of the cylindrical blocking column connecting plates are fixedly connected with cylindrical column blocking columns, the bottom rear sides of the two connecting cross bars are fixedly connected to the left and right sides of the top of the front side of the triangular support frame, the middle parts of the inner sides of the two connecting cross bars are fixedly connected with a unloading barrel connecting frame, and the rear sides of the inner sides of the two connecting cross bars are fixedly connected with unloading control parts.

[0012] As a further solution of the present invention: the unloading control part includes two unloading control component side panels, the tops of the outer sides of the two unloading control component side panels are fixedly connected to the rear sides of the inner sides of the two connecting cross bars, the middle parts of the rear sides of the two unloading control component side panels are fixedly connected with a motor connecting plate, the middle part of the top of the motor connecting plate is fixedly connected with a motor, the output end of the motor is fixedly connected with a turntable, the left and right sides of the top of the motor connecting plate are fixedly connected with tension disk connecting rods, and the top ends of the two tension disk connecting rods are fixedly connected with tension disks.

[0013] As a further solution of the present invention: the tops of the inner rear sides of the two side plates of the blanking control components are fixedly connected with columnar rotating upright connecting blocks, the middle parts of the inner walls of the two columnar rotating upright connecting blocks are rotatably connected with columnar rotating uprights, the tops of the two columnar rotating uprights extend to the tops of the two columnar rotating upright connecting blocks and are fixedly connected with a second turntable, and the outer walls of the two second turntables, the turntable and the two tension disks are covered with tracks.

[0014] As a further solution of the present invention: the bottom of the inner rear side of the two side panels of the blanking control assembly are fixedly connected with the bottom connecting block of the columnar rotating upright pole, the bottom ends of the two columnar rotating upright poles are rotatably connected to the top of the bottom connecting block of the two columnar rotating upright poles, the outer walls of the two columnar rotating upright poles are fixedly connected with a columnar rotating block on one side outer wall of the bottom of the columnar rotating upright pole connecting block, the inner middle part of the two side panels of the blanking control assembly are fixedly connected with a motor, and the top and bottom of the inner front side of the two side panels of the blanking control assembly are fixedly connected with a lifting upright pole guide The tops of the two cylindrical rotating blocks are provided with a section which gradually rises from the front to the back, the middle parts of the inner sides of the two side plates of the blanking control components are fixedly connected with a swing rod connecting block, the inner sides of the two swing rod connecting blocks are rotatably connected with the swing rod, the rear sides of the two swing rods are rotatably connected with the wheel hub, the outer walls of the two wheel hubs are rotatably connected to the top front sides of the two cylindrical rotating blocks, the front sides of the two swing rods are provided with a swing rod U-shaped groove, and the bottoms of the outer front sides of the two side plates of the blanking control components are fixedly connected with a columnar lifting rod guide block.

[0015] As a further solution of the present invention: the discharge barrel connecting frame includes a discharge barrel connecting plate, the inner wall of the discharge barrel connecting plate is fixedly connected to the discharge barrel body, the front side of the outer wall of the discharge barrel body is fixedly connected to the side close to the discharge barrel connecting plate with a discharge head, the left and right sides of the rear side of the top of the discharge barrel connecting plate are fixedly connected to lifting rods, the outer walls of the two lifting rods are slidably connected to the inner walls of the two groups of lifting rod guide blocks, the middle part of the two lifting rods is provided with a through groove, and the middle part of the inner wall of the through groove opened by the two lifting rods is fixedly connected with a columnar block.

[0016] As a further solution of the present invention: the outer walls of the two swing arms are slidably connected to the inner walls of the through grooves opened by the two lifting vertical rods, and the inner walls of the swing arm U-shaped grooves opened on the front sides of the two swing arms are slidably connected to the outer walls of the columnar blocks.

[0017] As a further solution of the present invention: the rear sides of the left and right sides of the two discharge barrel connecting plates are fixedly connected with columnar lifting rod connecting blocks, the tops of the two columnar lifting rod connecting blocks are fixedly connected with columnar lifting rods, the outer walls of the two columnar lifting rods are slidably connected to the inner walls of the two columnar lifting vertical rod guide blocks, the outer walls of the two columnar lifting rods are provided with springs on one side of the bottom of the columnar lifting vertical rod guide blocks, the tops of the two columnar lifting rods are fixedly connected with top blocks, the outer sides of the two top blocks are fixedly connected with columnar support rods, the bottom of the inner wall of the discharge barrel main body is slidably connected to the outer wall of the cylindrical blocking column, and the top of the discharge barrel main body is aligned with the bottom of the discharge barrel connecting frame.

[0018] As a further solution of the present invention: the rear sides of the inner sides of the two side connecting rods are fixedly connected to the middle parts of the outer sides of the two supporting uprights, the front sides of the inner sides of the two side connecting rods are fixedly connected to the catalyst barrel blocking column connecting plate, the inner wall of the catalyst barrel blocking column connecting plate is fixedly connected to the blocking column, the top of the outer wall of the blocking column is slidably connected to the blocking column, the top of the rear side of the outer wall of the blocking column is fixedly connected to the catalyst barrel discharge head, and the rear end of the catalyst barrel discharge head is aligned with the top middle of the reaction tank, and the top of the outer wall of the blocking column is fixedly connected to a lifting connection plate, and the left and right sides of the lifting connection plate are fixedly connected to the lifting connection plate side rods, and the bottom outer sides of the two lifting connection plate side rods are fixedly connected to the lifting connection uprights, the outer wall of the blocking column is slidably connected to the catalyst barrel connecting frame plate, and the left and right sides of the catalyst barrel connecting frame plate are fixedly connected to side blocks, and the rear sides of the two side blocks are fixedly connected to the connecting frame plate connecting rods, two The top of the two V-shaped rotating side plates is provided with a V-shaped rotating side plate slide groove, and the top of the two rear sides of the two V-shaped rotating side plates is provided with a second V-shaped rotating side plate slide groove. The outer walls of the two catalyst barrel lifting blocks are slidably connected to the inner walls of the V-shaped rotating side plate slide grooves opened by the two V-shaped rotating side plates, and the middle parts of the two V-shaped rotating side plates are rotatably connected to the middle parts of the outer sides of the two supporting vertical rods, and the inner walls of the second V-shaped rotating side plate slide grooves opened by the two V-shaped rotating side plates are slidably connected to the outer walls of the two columnar supporting rods, and the top middle part of the reaction tank is aligned with the front side of the blanking head.

[0019] In addition, the present invention also relates to a by-product recovery and utilization system and a purification process for preparing tetrahydrofuran copolyether glycol, comprising the following steps:

[0020] Step 1: Collect the separated by-products into a storage box;

[0021] Step 2: When the by-product in the storage box reaches a certain amount, the conveying system is started to convey the by-product to the discharge box through the feed pipe;

[0022] Step 3: The by-products in the discharge box are transported to the discharge barrel through its bottom. The discharge barrel is driven by a motor and moves up and down through a series of mechanical transmission devices.

[0023] Step 4: The discharge head of the discharge barrel body intermittently delivers the by-product to the inner wall of the reaction tank and fully mixes it with the catalyst in the reaction tank;

[0024] Step 5: At the same time, the catalyst barrel lifting block is raised and lowered by the reciprocating rotation of the V-shaped rotating side plate, so that the catalyst barrel discharge head is intermittently opened or closed, thereby transporting the catalyst to the inner wall of the reaction tank;

[0025] Step 6: After the by-products and the catalyst are fully mixed in the reaction tank, the next step of reaction or treatment is carried out to improve the reaction efficiency and the purification effect of the by-products.

[0026] The beneficial effects of the present invention are:

[0027] The present invention realizes automatic mixing and intermittent delivery of by-products and catalysts by providing a feeding control mechanism and a catalyst quantitative feeding mechanism, thereby improving not only the reaction efficiency but also the purification quality of the by-products. Through a carefully designed mechanical transmission device and control system, the present invention can accurately control the mixing ratio of the by-products and the catalyst and the delivery timing, thereby ensuring the stability and reliability of the entire purification process. In addition, the system has a compact structure and is easy to operate, greatly reducing production costs and improving production efficiency, thereby providing an efficient and practical solution for the recovery and purification of by-products in the preparation of tetrahydrofuran copolyether glycol. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the main three-dimensional structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the main body three-dimensional separation structure of the present invention;

[0030] Figure 3 It is a schematic diagram of the three-dimensional structure of the material discharge control mechanism of the present invention;

[0031] Figure 4 It is a schematic diagram of the three-dimensional separation structure of the material discharge control mechanism of the present invention;

[0032] Figure 5 It is a schematic diagram of the three-dimensional structure of the material storage platform of the present invention;

[0033] Figure 6 This is a schematic diagram of the three-dimensional separation structure of the blanking component of the present invention;

[0034] Figure 7 It is a schematic diagram of the three-dimensional structure of the blanking control component of the present invention;

[0035] Figure 8 This is a schematic diagram of the three-dimensional structure of the material discharge barrel connecting frame of the present invention;

[0036] Figure 9 This is a schematic diagram of the three-dimensional structure of the catalyst quantitative feeding mechanism of the present invention;

[0037] Figure 10It is a schematic diagram of the three-dimensional separation structure of the catalyst quantitative feeding mechanism of the present invention.

[0038] In the figure: 1. material unloading control mechanism; 11. material storage platform; 111. material storage box connecting block; 112. inverted U-shaped support plate; 113. triangular support frame; 114. material storage box; 115. material passage; 116. material unloading box; 117. material unloading box connecting plate; 118. side plate; 119. columnar connecting rod; 1110. L-shaped side plate; 12. material unloading assembly; 121. supporting vertical rod; 122. connecting cross bar; 123. cylindrical blocking column connecting plate; 124. cylindrical blocking column; 125. material unloading control member; 1251. Side panel of the blanking control assembly; 1252, motor connecting plate; 1253, motor; 1254, turntable; 1255, tension disk connecting rod; 1256, tension disk; 1257, crawler track; 1258, columnar rotating upright connecting block; 1259, columnar rotating upright; 12510, second turntable; 12511, columnar rotating upright bottom connecting block; 12512, columnar rotating stop block; 12513, swing arm connecting block; 12514, swing arm; 12515, swing arm U-shaped groove; 12516, wheel hub; 12517, lifting rod guide block; 12518, columnar lifting rod guide block; 126, discharge barrel connecting frame; 1261, discharge barrel connecting plate; 1262, discharge barrel body; 1263, discharge head; 1264, lifting rod; 1265, through groove; 1266, columnar block; 1267, columnar lifting rod connecting block; 1268, columnar lifting rod; 1269, spring; 12610, top block; 12611, columnar push rod; 2, catalyst quantitative discharge mechanism; 21, side connecting rod; 22, reaction Tank connecting plate; 23. Reaction tank; 24. Catalyst barrel blocking column connecting plate; 25. Blocking column; 26. Catalyst barrel; 27. Catalyst barrel discharge head; 28. Catalyst barrel connecting frame plate; 29. ​​Side block; 210. Connecting frame plate connecting rod; 211. Lifting connecting plate; 212. Lifting connecting plate side rod; 213. Lifting connecting vertical rod; 214. Columnar block side connecting block; 215. Catalyst barrel lifting block; 216. V-shaped rotating side plate; 217. V-shaped rotating side plate slide; 218. Second V-shaped rotating side plate slide. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] like Figure 1-2As shown, the present invention provides a by-product recovery and utilization system for preparing tetrahydrofuran copolyether glycol, comprising a feeding control mechanism 1 , a catalyst quantitative feeding mechanism 2 is provided on the front side of the feeding control mechanism 1 .

[0041] like Figure 2-10As shown, the material unloading control mechanism 1 includes a material storage platform 11, and a material unloading component 12 is provided on the front side of the material storage platform 11. The catalyst quantitative unloading mechanism 2 includes two side connecting rods 21, and the inner and rear sides of the two side connecting rods 21 are fixedly connected to the reaction tank connecting plate 22, and the inner wall of the reaction tank connecting plate 22 is fixedly connected to the reaction tank 23. The material storage platform 11 includes a material storage box connecting block 111, and the bottom of the material storage box connecting block 111 is fixedly connected to an inverted U-shaped support plate 112, and the left and right sides of the rear side of the inverted U-shaped support plate 112 are fixedly connected to a triangular support frame 113, and the rear side of the material storage box connecting block 111 is fixedly connected to a material storage box 114, and the front side of the outer wall of the material storage box 114 is fixedly connected to a material feeding pipe 115, and the front end of the material feeding pipe 115 is fixedly connected to the material unloading mechanism. Box 116, both sides of the outer wall of the unloading box 116 are fixedly connected with unloading box connecting plates 117, the left and right sides of the two unloading box connecting plates 117 are fixedly connected with side panels 118, the outer ends of the two groups of side panels 118 are fixedly connected with columnar connecting rods 119, the outer ends of the two groups of columnar connecting rods 119 are fixedly connected with L-shaped side panels 1110, the unloading assembly 12 includes two supporting vertical rods 121, the tops of the two supporting vertical rods 121 are fixedly connected with connecting cross bars 122, the inner middle parts of the two supporting vertical rods 121 are fixedly connected with cylindrical blocking column connecting plates 123, the inner walls of the cylindrical blocking column connecting plates 123 are fixedly connected with cylindrical blocking columns 124, and the bottom rear sides of the two connecting cross bars 122 are fixedly connected to the front side of the triangular support frame 113 On the left and right sides of the top, the middle of the inner side of the two connecting cross bars 122 is fixedly connected with a discharge barrel connecting frame 126, and the rear side of the inner side of the two connecting cross bars 122 is fixedly connected with a discharge control part 125. The discharge control part 125 includes two discharge control component side plates 1251. The tops of the outer sides of the two discharge control component side plates 1251 are fixedly connected to the rear sides of the inner sides of the two connecting cross bars 122. The middle of the rear side of the two discharge control component side plates 1251 is fixedly connected with a motor connecting plate 1252. The middle of the top of the motor connecting plate 1252 is fixedly connected with a motor 1253. The output end of the motor 1253 is fixedly connected with a turntable 1254. The left and right sides of the top of the motor connecting plate 1252 are fixedly connected with a tension disk connecting rod 1255 The tops of the two tension disk connecting rods 1255 are fixedly connected to the tension disk 1256, and the tops of the inner rear sides of the two unloading control component side plates 1251 are fixedly connected to the columnar rotating vertical rod connecting blocks 1258. The middle parts of the inner walls of the two columnar rotating vertical rod connecting blocks 1258 are rotatably connected to the columnar rotating vertical rods 1259. The tops of the two columnar rotating vertical rods 1259 extend to the tops of the two columnar rotating vertical rod connecting blocks 1258 and are fixedly connected to the second turntable 12510. The outer walls of the two second turntables 12510, the turntable 1254 and the two tension disks 1256 are covered with crawlers 1257. The bottoms of the inner rear sides of the two unloading control component side plates 1251 are fixedly connected to the columnar rotating vertical rod bottom connecting blocks 12511.The bottom ends of the two columnar rotating uprights 1259 are rotatably connected to the tops of the two columnar rotating upright bottom connecting blocks 12511. The outer walls of the two columnar rotating uprights 1259 are fixedly connected to the outer walls on one side of the bottom of the columnar rotating upright connecting block 1258. The inner middle parts of the two blanking control component side plates 1251 are fixedly connected to the motor 1253. The tops and bottoms of the inner front sides of the two blanking control component side plates 1251 are fixedly connected to the lifting upright guide blocks 12517. The tops of the two columnar rotating blocks 12512 are both provided with a section that gradually rises from front to back. The middle parts of the inner sides of the two blanking control component side plates 1251 are fixedly connected to the swing rod connecting blocks 12513. The two swing rod connecting blocks The inner side of 12513 is rotatably connected to a swing rod 12514, and the rear sides of the two swing rods 12514 are rotatably connected to the wheel hub 12516. The outer walls of the two wheel hubs 12516 are rotatably connected to the top front sides of the two columnar rotating blocks 12512. The front sides of the two swing rods 12514 are provided with a swing rod U-shaped groove 12515. The bottom of the outer front sides of the two unloading control component side plates 1251 are fixedly connected to the columnar lifting rod guide blocks 12518. The unloading barrel connecting frame 126 includes a unloading barrel connecting plate 1261. The inner wall of the unloading barrel connecting plate 1261 is fixedly connected to the unloading barrel main body 1262. The front side of the outer wall of the unloading barrel main body 1262 is fixedly connected to the unloading head 12 63. The left and right sides of the rear side of the top of the discharge barrel connecting plate 1261 are fixedly connected with lifting rods 1264. The outer walls of the two lifting rods 1264 are slidably connected to the inner walls of the two sets of lifting rod guide blocks 12517. The middle parts of the two lifting rods 1264 are provided with through grooves 1265. The middle parts of the inner walls of the through grooves 1265 opened by the two lifting rods 1264 are fixedly connected with columnar blocks 1266. The outer walls of the two swing rods 12514 are slidably connected to the inner walls of the through grooves 1265 opened by the two lifting rods 1264. The inner walls of the swing rod U-shaped grooves 12515 opened on the front sides of the two swing rods 12514 are slidably connected to the outer walls of the columnar blocks 1266. The rear sides of the left and right sides of the two discharge barrel connecting plates 1261 are fixedly connected. It is connected to a columnar lifting rod connecting block 1267, and the tops of the two columnar lifting rod connecting blocks 1267 are fixedly connected to columnar lifting rods 1268, and the outer walls of the two columnar lifting rods 1268 are slidably connected to the inner walls of the two columnar lifting vertical rod guide blocks 12518. The outer walls of the two columnar lifting rods 1268 are sleeved with springs 1269 on one side of the bottom of the columnar lifting vertical rod guide blocks 12518, and the tops of the two columnar lifting rods 1268 are fixedly connected to top blocks 12610, and the outer sides of the two top blocks 12610 are fixedly connected to columnar support rods 12611. The bottom of the inner wall of the discharge barrel body 1262 is slidably connected to the outer wall of the cylindrical blocking column 124, and the top of the discharge barrel body 1262 is aligned with the bottom of the discharge barrel connecting frame 126.The rear sides of the inner sides of the two side connecting rods 21 are fixedly connected to the middle of the outer sides of the two supporting uprights 121. The front sides of the inner sides of the two side connecting rods 21 are fixedly connected to the catalyst barrel blocking column connecting plate 24. The inner wall of the catalyst barrel blocking column connecting plate 24 is fixedly connected to the blocking column 25. The top of the outer wall of the blocking column 25 is slidably connected to the blocking column 25. The top of the outer wall of the blocking column 25 is fixedly connected to the catalyst barrel discharge head 27. The rear end of the catalyst barrel discharge head 27 is aligned with the middle of the top of the reaction tank 23. The top of the outer wall of the blocking column 25 is fixedly connected to the catalyst barrel discharge head 27. The lifting connection plate 211 is fixedly connected, and the left and right sides of the lifting connection plate 211 are fixedly connected to the lifting connection plate side rods 212. The bottom outer sides of the two lifting connection plate side rods 212 are fixedly connected to the lifting connection vertical rods 213. The outer wall of the blocking column 25 is slidably connected to the catalyst barrel connecting frame plate 28. The left and right sides of the catalyst barrel connecting frame plate 28 are fixedly connected to the side blocks 29. The rear sides of the two side blocks 29 are fixedly connected to the connecting frame plate connecting rods 210. The rear sides of the two connecting frame plate connecting rods 210 are fixed. The bottom ends of the two lifting connecting rods 213 are fixedly connected to the top of the front side of the two supporting rods 121, and the inner sides of the two columnar block side connecting blocks 214 are fixedly connected to the catalyst barrel lifting block 215. The outer walls of the two catalyst barrel lifting blocks 215 are sleeved with V-shaped rotating side plates 216, and the front sides of the two V-shaped rotating side plates 216 are provided with V-shaped rotating side plate slide grooves 217. The tops of the rear sides of the two V-shaped rotating side plates 216 are provided with second V-shaped rotating side plates. The outer walls of the two catalyst barrel lifting blocks 215 are slidably connected to the inner walls of the V-shaped rotating side plate chutes 217 defined by the two V-shaped rotating side plates 216. The middle portions of the two V-shaped rotating side plates 216 are rotatably connected to the middle portions of the outer sides of the two supporting uprights 121. The inner walls of the second V-shaped rotating side plate chutes 218 defined by the two V-shaped rotating side plates 216 are slidably connected to the outer walls of the two columnar support rods 12611. The middle portion of the top of the reaction tank 23 is aligned with the front side of the discharge head 1263.

[0042] The by-products produced by the reaction are filled on the inner wall of the storage box 114. When they need to be processed, the by-products on the inner wall of the storage box 114 are transported to the inner wall of the discharge box 116 through the feeding pipe 115. The discharge box 116 transports the by-products to the inner wall of the discharge barrel body 1262 through its bottom. At this time, the motor 1253 is started to drive the turntable 1254 to rotate. During the rotation of the turntable 1254, the two second turntables 12510 are driven to rotate through the crawler 1257. During the rotation, the two second turntables 12510 drive the two columnar rotating uprights 1259 to rotate. During the rotation, the two columnar rotating uprights 1259 drive the two columnar rotating blocks 12512 to rotate. The two columnar rotating blocks 12512 rotate During the process, the two wheel hubs 12516 are driven to move on the top front sides of the two cylindrical rotating blocks 12512, and the two wheel hubs 12516 drive the two swing rods 12514 to swing during the movement, and the two swing rods 12514 drive the discharge barrel connecting frame 126 to rise and fall during the swinging process, and the discharge barrel connecting frame 126 drives the discharge barrel main body 1262 to rise and fall during the lifting process, and the discharge barrel main body 1262 makes the discharge barrel main body 1262 slide back and forth up and down on the outer wall of the cylindrical blocking column 124 during the lifting process, so that the discharge head 1263 of the discharge barrel main body 1262 is intermittently blocked, so that the discharge barrel main body 1262 intermittently transports the by-products to the inner wall of the reaction tank 23 through the discharge head 1263;

[0043] At the same time, the unloading barrel connecting plate 1261 moves up and down, thereby driving the two columnar lifting rod connecting blocks 1267 to drive the top columnar lifting rod 1268 to move up and down, so that the outer walls of the two columnar supporting rods 12611 reciprocate and push against the second V-shaped rotating side plate slide groove 218 opened by the V-shaped rotating side plate 216, so that the two V-shaped rotating side plates 216 reciprocate with the middle as the axis, thereby driving the catalyst barrel lifting supporting block 215 to move up and down through the reciprocating rotation of the V-shaped rotating side plate 216, and the catalyst barrel lifting supporting block 215 drives the lifting connecting rod 213 to move up and down during the lifting process, The lowering connecting rod 213 drives the lifting connecting plate 211 to rise and fall during the lifting process, and the lifting connecting plate 211 drives the blocking column 25 to rise and fall during the lifting process. The blocking column 25 causes the catalyst barrel discharge head 27 to open or close intermittently during the lifting process, so that the catalyst barrel discharge head 27 intermittently transports the catalyst to the inner wall of the reaction tank 23, so that the by-products and the catalyst are fully mixed, thereby improving the reaction efficiency and the purification effect of the by-products. The entire system has a compact structure and a reasonable design, which realizes the automatic recycling and purification of by-products, reduces production costs and improves production efficiency.

[0044] In addition, the present invention also relates to a by-product recovery and utilization system and a purification process for preparing tetrahydrofuran copolyether glycol, comprising the following steps:

[0045] Step 1: Collect the separated by-products into the storage box 114;

[0046] Step 2: When the by-product in the storage box 114 reaches a certain amount, the conveying system is started to convey the by-product through the feed pipe 115 to the discharge box 116;

[0047] Step 3: The byproducts in the discharge box 116 are transported to the discharge barrel body 1262 through its bottom. The discharge barrel body 1262 is driven by the motor 1253 and moves up and down through a series of mechanical transmission devices;

[0048] Step 4: The discharge head 1263 of the discharge barrel body 1262 intermittently delivers the by-products to the inner wall of the reaction tank 23 to fully mix with the catalyst in the reaction tank;

[0049] Step 5: At the same time, the catalyst barrel lifting block 215 is raised and lowered by the reciprocating rotation of the V-shaped rotating side plate 216, so that the catalyst barrel discharge head 27 is intermittently opened or closed, thereby transporting the catalyst to the inner wall of the reaction tank 23;

[0050] Step 6: After the by-products and the catalyst are fully mixed in the reaction tank 23, the next step of reaction or treatment is carried out to improve the reaction efficiency and the purification effect of the by-products.

[0051] The working principle of the present invention is as follows: the by-products generated by the reaction are filled on the inner wall of the storage box 114. When they need to be processed, the by-products on the inner wall of the storage box 114 are transported to the inner wall of the discharge box 116 through the feeding pipe 115. The discharge box 116 then transports the by-products to the inner wall of the discharge barrel body 1262 through its bottom. At this time, the motor 1253 is started to drive the turntable 1254 to rotate. During the rotation process, the turntable 1254 drives the two second turntables 12510 to rotate through the crawler 1257. When the two second turntables 12510 rotate, they drive the two columnar rotating poles 1259 to rotate. The two cylindrical rotating uprights 1259 drive the two cylindrical rotating blocks 12512 to rotate during the rotation process. The two cylindrical rotating blocks 12512 drive the two wheel hubs 12516 to move on the top front side of the two cylindrical rotating blocks 12512 during the rotation. The two wheel hubs 12516 drive the two swing rods 12514 to swing during the movement. The two swing rods 12514 drive the unloading barrel connecting frame 126 to rise and fall during the swinging process. The unloading barrel connecting frame 126 drives the unloading barrel main body 1262 to rise and fall during the lifting process. The unloading barrel main body 1262 is moved up and down in the cylindrical blocking column 12 4, the outer wall of the material barrel body 1262 slides back and forth, causing the discharge head 1263 of the discharge barrel body 1262 to be intermittently blocked, thereby causing the discharge barrel body 1262 to intermittently transport the by-products to the inner wall of the reaction tank 23 through the discharge head 1263. At the same time, the discharge barrel connecting plate 1261 moves up and down, driving the two columnar lifting rod connecting blocks 1267 to move the top columnar lifting rod 1268 up and down, so that the outer walls of the two columnar supporting rods 12611 reciprocately against the second V-shaped rotating side plate chute 218 provided on the V-shaped rotating side plate 216, prompting the two V-shaped rotating side plates 216 to rotate in the middle. The part rotates back and forth about the axis, and the reciprocating rotation of the V-shaped rotating side plate 216 drives the catalyst barrel lifting block 215 to rise and fall. The catalyst barrel lifting block 215 drives the lifting connecting rod 213 to rise and fall during the lifting process. The lifting connecting rod 213 drives the lifting connecting plate 211 to rise and fall during the lifting process. The lifting connecting plate 211 drives the blocking column 25 to rise and fall during the lifting process. The blocking column 25 makes the catalyst barrel discharge head 27 intermittently open or close during the lifting process, so that the catalyst barrel discharge head 27 intermittently transports the catalyst to the inner wall of the reaction tank 23, so that the by-products and the catalyst are fully mixed.

[0052] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A by-product recovery and utilization system for preparing tetrahydrofuran copolyether glycol, comprising a feed control mechanism (1), characterized in that: A catalyst quantitative discharging mechanism (2) is provided on the front side of the discharging control mechanism (1); The material unloading control mechanism (1) comprises a material storage platform (11), and a material unloading component (12) is provided on the front side of the material storage platform (11); The catalyst quantitative feeding mechanism (2) comprises two side connecting rods (21), the inner rear sides of the two side connecting rods (21) are fixedly connected to a reaction tank connecting plate (22), and the inner wall of the reaction tank connecting plate (22) is fixedly connected to a reaction tank (23); The material storage platform (11) comprises a material storage box connecting block (111), the bottom of the material storage box connecting block (111) is fixedly connected to an inverted U-shaped support plate (112), the left and right sides of the rear side of the inverted U-shaped support plate (112) are fixedly connected to a triangular support frame (113), the rear side of the material storage box connecting block (111) is fixedly connected to a material storage box (114), the front side of the outer wall of the material storage box (114) is fixedly connected to a material passage pipe (115), and the passage pipe (115) is fixedly connected to the front side of the outer wall of the material storage box (114). The front end of the material pipe (115) is fixedly connected to a material box (116), and both sides of the outer wall of the material box (116) are fixedly connected to material box connecting plates (117), and the left and right sides of the two material box connecting plates (117) are fixedly connected to side plates (118), and the outer ends of the two groups of side plates (118) are fixedly connected to columnar connecting rods (119), and the outer ends of the two groups of columnar connecting rods (119) are fixedly connected to L-shaped side plates (1110).

2. The by-product recovery and utilization system for preparing tetrahydrofuran copolyether glycol according to claim 1, wherein: The blanking assembly (12) includes two supporting uprights (121), the tops of the two supporting uprights (121) are fixedly connected to a connecting cross bar (122), the inner middle parts of the two supporting uprights (121) are fixedly connected to a cylindrical blocking column connecting plate (123), the inner wall of the cylindrical blocking column connecting plate (123) is fixedly connected to a cylindrical blocking column (124), the bottom rear sides of the two connecting cross bars (122) are fixedly connected to the left and right sides of the top of the front side of the triangular support frame (113), the middle parts of the inner sides of the two connecting cross bars (122) are fixedly connected to a blanking barrel connecting frame (126), and the inner rear sides of the two connecting cross bars (122) are fixedly connected to a blanking control component (125).

3. The by-product recovery and utilization system for preparing tetrahydrofuran copolyether glycol according to claim 2, wherein: The material discharging control component (125) comprises two material discharging control component side panels (1251), the tops of the outer sides of the two material discharging control component side panels (1251) are fixedly connected to the rear sides of the inner sides of the two connecting cross bars (122), the middle parts of the rear sides of the two material discharging control component side panels (1251) are fixedly connected to a motor connecting plate (1252), the middle part of the top of the motor connecting plate (1252) is fixedly connected to a motor (1253), the output end of the motor (1253) is fixedly connected to a turntable (1254), the left and right sides of the top of the motor connecting plate (1252) are fixedly connected to tension disk connecting rods (1255), and the top ends of the two tension disk connecting rods (1255) are fixedly connected to a tension disk (1256).

4. The by-product recovery and utilization system for preparing tetrahydrofuran copolyether glycol according to claim 3, wherein: The top of the inner rear side of the two side plates (1251) of the blanking control assembly are fixedly connected with a columnar rotating upright connecting block (1258), the middle of the inner wall of the two columnar rotating upright connecting blocks (1258) are rotatably connected with a columnar rotating upright (1259), the top of the two columnar rotating uprights (1259) extend to the top of the two columnar rotating upright connecting blocks (1258) and are fixedly connected with a second turntable (12510), and the outer walls of the two second turntables (12510), the turntable (1254) and the two tension disks (1256) are covered with tracks (1257).

5. The by-product recovery and utilization system for preparing tetrahydrofuran copolyether glycol according to claim 4, characterized in that: The bottom of the inner rear side of the two side plates (1251) of the material removal control components are fixedly connected with the bottom connecting block (12511) of the columnar rotating upright pole. The bottom ends of the two columnar rotating upright poles (1259) are rotatably connected to the top of the bottom connecting block (12511) of the two columnar rotating upright poles. The outer wall of the two columnar rotating upright poles (1259) is fixedly connected with a columnar rotating stop block (12512) on one side of the outer wall of the bottom of the columnar rotating upright pole connecting block (1258). The middle part of the inner side of the two side plates (1251) of the material removal control components are fixedly connected with the motor (1253). The top and bottom of the inner front side of the two side plates (1251) of the material removal control components are fixedly connected with the lifting upright pole guide block (12517). The two columnar rotating stop blocks (1251) are fixedly connected with the lifting upright pole guide block (12517). 2) are provided with a cross section that gradually rises from front to back at the top, the middle of the inner side of the two side plates (1251) of the blanking control assembly are fixedly connected with a swing rod connecting block (12513), the inner sides of the two swing rod connecting blocks (12513) are rotatably connected with a swing rod (12514), the rear sides of the two swing rods (12514) are rotatably connected with a hub (12516), the outer walls of the two hubs (12516) are rotatably connected to the top front sides of the two columnar rotating blocks (12512), the front sides of the two swing rods (12514) are provided with a swing rod U-shaped groove (12515), and the bottom of the outer front sides of the two side plates (1251) of the blanking control assembly are fixedly connected with a columnar lifting rod guide block (12518).

6. The by-product recovery and utilization system for preparing tetrahydrofuran copolyether glycol according to claim 2, characterized in that: The discharge barrel connecting frame (126) includes a discharge barrel connecting plate (1261), the inner wall of which is fixedly connected to a discharge barrel body (1262), the front side of the outer wall of the discharge barrel body (1262) is fixedly connected to a discharge head (1263) on the side close to the discharge barrel connecting plate (1261), the left and right sides of the top rear side of the discharge barrel connecting plate (1261) are fixedly connected to lifting rods (1264), the outer walls of the two lifting rods (1264) are slidably connected to the inner walls of the two groups of lifting rod guide blocks (12517), the middle parts of the two lifting rods (1264) are provided with through grooves (1265), and the middle parts of the inner walls of the through grooves (1265) provided by the two lifting rods (1264) are fixedly connected to columnar blocks (1266).

7. The by-product recovery and utilization system for preparing tetrahydrofuran copolyether glycol according to claim 5, characterized in that: The outer walls of the two swing rods (12514) are slidably connected to the inner walls of the through slots (1265) opened in the two lifting vertical rods (1264), and the inner walls of the swing rod U-shaped slots (12515) opened on the front sides of the two swing rods (12514) are slidably connected to the outer walls of the columnar block (1266).

8. The by-product recovery and utilization system for preparing tetrahydrofuran copolyether glycol according to claim 6, characterized in that: The rear sides of the left and right sides of the two unloading barrel connecting plates (1261) are fixedly connected with columnar lifting rod connecting blocks (1267), the tops of the two columnar lifting rod connecting blocks (1267) are fixedly connected with columnar lifting rods (1268), the outer walls of the two columnar lifting rods (1268) are slidably connected to the inner walls of the two columnar lifting rod guide blocks (12518), and the outer walls of the two columnar lifting rods (1268) are slidably connected to the inner walls of the two columnar lifting rod guide blocks (12518). 518) is provided with a spring (1269) on one side of the bottom, the top ends of the two columnar lifting rods (1268) are fixedly connected with a top block (12610), the outer sides of the two top blocks (12610) are fixedly connected with a columnar support rod (12611), the bottom of the inner wall of the discharge barrel body (1262) is slidably connected to the outer wall of the cylindrical blocking column (124), and the top of the discharge barrel body (1262) is aligned with the bottom of the discharge barrel connecting frame (126).

9. The by-product recovery and utilization system for preparing tetrahydrofuran copolyether glycol according to claim 1, characterized in that: The rear sides of the inner sides of the two side connecting rods (21) are fixedly connected to the middle parts of the outer sides of the two supporting uprights (121), the front sides of the inner sides of the two side connecting rods (21) are fixedly connected to the catalyst barrel blocking column connecting plate (24), the inner wall of the catalyst barrel blocking column connecting plate (24) is fixedly connected to the blocking column (25), the top of the outer wall of the blocking column (25) is slidably connected to the blocking column (26), the top of the rear side of the outer wall of the blocking column (26) is fixedly connected to the catalyst barrel discharge head (27), the rear end of the catalyst barrel discharge head (27) is aligned with the middle part of the top of the reaction tank (23), and the blocking column (26) is fixedly connected to the catalyst barrel discharge head (27). ) is fixedly connected to a lifting connection plate (211) on the top of the outer wall, and the left and right sides of the lifting connection plate (211) are fixedly connected to lifting connection plate side rods (212), and the bottom outer sides of the two lifting connection plate side rods (212) are fixedly connected to lifting connection vertical rods (213), and the outer wall of the blocking column (26) is slidably connected to a catalyst barrel connecting frame plate (28), and the left and right sides of the catalyst barrel connecting frame plate (28) are fixedly connected to side blocks (29), and the rear sides of the two side blocks (29) are fixedly connected to the connecting frame plate connecting rods (210), and the two connecting frame plate connecting rods (211) are fixedly connected to the catalyst barrel connecting frame plate (28). The rear sides of the two lifting connecting rods (10) are fixedly connected to the top of the front sides of the two supporting vertical rods (121), the bottom ends of the two lifting connecting vertical rods (213) are fixedly connected with columnar block side connection blocks (214), the inner sides of the two columnar block side connection blocks (214) are fixedly connected with catalyst barrel lifting blocks (215), the outer walls of the two catalyst barrel lifting blocks (215) are sleeved with V-shaped rotating side plates (216), the front sides of the two V-shaped rotating side plates (216) are provided with V-shaped rotating side plate slide grooves (217), the tops of the rear sides of the two V-shaped rotating side plates (216) are provided with second The outer walls of the two catalyst barrel lifting blocks (215) are slidably connected to the inner walls of the V-shaped rotating side plate chute (217) opened by the two V-shaped rotating side plates (216), the middle parts of the two V-shaped rotating side plates (216) are rotatably connected to the middle parts of the outer sides of the two supporting vertical rods (121), and the inner walls of the second V-shaped rotating side plate chute (218) opened by the two V-shaped rotating side plates (216) are slidably connected to the outer walls of the two columnar support rods (12611), and the middle part of the top of the reaction tank (23) is aligned with the front side of the discharge head (1263).

10. The purification process of the by-product recovery and utilization system for preparing tetrahydrofuran copolyether glycol according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Collect the separated by-products into a storage box (114); Step 2: When the by-product in the storage box (114) reaches a certain amount, the conveying system is started to convey the by-product to the discharge box (116) through the feed pipe (115); Step 3: The byproducts in the discharge box (116) are transported to the discharge barrel body (1262) through its bottom. The discharge barrel body (1262) is driven by the motor (1253) and moves up and down through a series of mechanical transmission devices; Step 4: The discharge head (1263) of the discharge barrel body (1262) intermittently delivers the by-product to the inner wall of the reaction tank (23) to fully mix with the catalyst in the reaction tank; Step 5: At the same time, the catalyst barrel lifting block (215) is lifted and lowered by the reciprocating rotation of the V-shaped rotating side plate (216), so that the catalyst barrel discharge head (27) is intermittently opened or closed, thereby transporting the catalyst to the inner wall of the reaction tank (23); Step 6: After the by-products and the catalyst are fully mixed in the reaction tank (23), the next step of reaction or treatment is carried out to improve the reaction efficiency and the purification effect of the by-products.

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