Catalyst filtering equipment for carbon dioxide-based polycarbonate reaction

Abstract

The utility model relates to catalyst filtering equipment for carbon dioxide-based polycarbonate reaction, which comprises a stirring barrel and a filtering barrel, support frames are arranged at the bottom ends of the stirring barrel and the filtering barrel, a barrel cover is arranged at the top end of the stirring barrel, a circulating pipe is arranged on the side wall of the barrel cover, and a stirring mechanism is arranged in the barrel cover. And a filtering structure is arranged in the filtering barrel. The utility model relates to the technical field of chemical catalyst filtration. According to the catalyst filtering equipment for the carbon dioxide-based polycarbonate reaction, a filtered liquid material can penetrate through a capillary tube to enter a filtering pipe, enters a liquid storage tank and then is introduced into a stirring barrel through a connecting pipe and a circulating pipe for secondary filtering, and during secondary filtering, the material firstly penetrates through an activated carbon filtering layer and then enters a liquid storage tank; the catalyst in the material can be effectively removed through secondary circulating filtration, and the condition that the catalyst left in the material affects downstream use is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical catalyst filtration, in particular to catalyst filtration equipment for carbon dioxide-based polycarbonate reactions. Background Art

[0002] A catalyst, also known as a catalyst, is a substance that can change the rate of a chemical reaction while its mass, composition, and chemical properties remain unchanged before and after participating in the chemical reaction. As an external factor, catalysts play an important role in organic chemical reactions. They can reduce the activation energy of the reaction, increase the reaction rate and yield, change the reaction path of organic reactions, control and optimize the chemical reaction, reduce environmental pollution during the reaction, and improve the reproducibility of the reaction process.

[0003] DMC is commonly used as a catalyst in the production of CO2-based polycarbonate polyols. DMC is a new, high-performance catalytic oxidized olefin ring-opening polymerization catalyst suitable for synthesizing oxidized olefin polyethers containing 1 to 6 functional groups as initiators. However, the zinc and potassium ions contained in DMC can affect downstream product applications and are generally controlled below 0.0002 mk / kg. Exceeding this level can easily cause heartburn in polyurethane products, hindering their use.

[0004] However, due to the small particle size of DMC, it is difficult for catalyst filtering equipment in the prior art to remove the residual DMC catalyst in the product. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a catalyst filtering device for carbon dioxide-based polycarbonate reaction, so as to solve the technical problems mentioned in the above background technology.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A catalyst filtering device for a carbon dioxide-based polycarbonate reaction comprises a stirring barrel and a filtering barrel. The bottom ends of the stirring barrel and the filtering barrel are both provided with a support frame. The top end of the stirring barrel is provided with a barrel cover. The side wall of the barrel cover is provided with a circulation pipe. The barrel cover is provided with a stirring mechanism inside. The filtering barrel is provided with a filtering structure inside.

[0008] The filtration structure includes a mounting plate, a plurality of evenly distributed filter tubes are provided on the top of the mounting plate, the tops of the filter tubes are connected to a liquid storage tank, connecting tubes are provided on both sides of the liquid storage tank, one of the connecting tubes is connected to the circulation pipe, the outer wall of the filter tube is provided with evenly distributed capillary pores, and a cleaning structure is provided inside the filter tube;

[0009] A screw pump is provided at the bottom end of the mixing barrel, and a discharge pipe of the screw pump is connected to the bottom end of the filter barrel. A plurality of lifting devices are provided on the outer wall of the filter barrel.

[0010] Furthermore, the stirring mechanism includes a rotating drum, which is fixedly installed inside the barrel cover. A stirring rod is rotatably arranged inside the rotating drum. A spiral plate is provided at a position on the outer wall of the stirring rod corresponding to the rotating drum. A guide pipe connected to the circulation pipe is provided at one end of the rotating drum, and a rolling structure is provided at the bottom end of the stirring rod.

[0011] Furthermore, the tumbling structure includes a transverse rod, which is fixedly connected to the bottom end of the stirring rod, and balancing balls are provided at both ends of the transverse rod.

[0012] Furthermore, the side walls of the circulation pipe and the connecting pipe are both extended outwardly to form hot water inlet pipes.

[0013] Furthermore, the cleaning structure includes a rotating shaft, a spiral disk is provided on the outer peripheral wall of the rotating shaft, an elastic telescopic rod is provided at the bottom end of the rotating shaft, and a supporting spring is provided on the outer peripheral wall of the elastic telescopic rod, the bottom end of the elastic telescopic rod is fixedly connected to the inner bottom wall of the filter tube, and a connecting plug is provided at the top end of the rotating shaft.

[0014] Furthermore, the lifting device includes a triangular platform, which is provided with multiple triangular platforms and is fixedly connected to the outer wall of the filter barrel. The top of the triangular platform is provided with a hydraulic telescopic rod, and the top wall of the hydraulic telescopic rod is provided with a fixed rod connected to the liquid storage tank.

[0015] In summary, the present invention has at least one of the following beneficial technical effects:

[0016] 1. A catalyst filtering device for carbon dioxide-based polycarbonate reaction, which pours the produced material, activated carbon and diatomaceous earth into the interior of the stirring barrel through the feed port set at the top of the stirring barrel, and the activated carbon and diatomaceous earth will adsorb the catalyst particles in the material, so that the catalyst and activated carbon particles together form larger particles, and then the capillary pores on the surface of the filter tube will filter the activated carbon and diatomaceous earth. At this time, the activated carbon and diatomaceous earth adsorbed with the catalyst will be blocked by the capillary pores on the surface of the filter tube, and an activated carbon filter layer will be formed on the outer surface of the filter tube, and the filtered liquid material will pass through the capillary tube into the interior of the filter tube and into the interior of the liquid storage tank, and then pass into the interior of the stirring barrel through the connecting pipe and the circulation pipe for secondary filtration. During the secondary filtration, the material first passes through the activated carbon filter layer, then passes through the capillary tube, and gathers in the liquid storage tank. Through the secondary circulation filtration, the catalyst inside the material can be effectively removed, and the residual catalyst inside the material can be prevented from affecting downstream use;

[0017] 2. A catalyst filtering device for carbon dioxide-based polycarbonate reaction, wherein a rotating shaft is installed inside a filter tube by means of a supporting spring and an elastic telescopic rod. When the liquid inside the filter tube pushes the rotating shaft upward through a connecting plug, the supporting spring is stretched. After the liquid is discharged, the thrust of the liquid decreases, and the supporting spring pulls the rotating shaft downward, causing the spiral disk to vibrate inside the filter tube, which can push the liquid inside the capillary tube in the opposite direction, effectively destroying the filter layer formed by activated carbon on the outer surface of the filter tube, and after the destruction, the filter layer will be quickly reorganized under the influence of water pressure, which can effectively improve the uniformity of the filter layer and improve the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of a catalyst filtering device for carbon dioxide-based polycarbonate reaction according to the present invention.

[0020] Figure 2 This is a schematic structural diagram of a filter barrel of a catalyst filtering device for carbon dioxide-based polycarbonate reaction according to the present invention.

[0021] Figure 3 This is a schematic diagram of the internal structure of a stirring barrel of a catalyst filtering device for carbon dioxide-based polycarbonate reaction according to the present invention.

[0022] Figure 4 This is a schematic diagram of the internal structure of a filter barrel of a catalyst filtering device for carbon dioxide-based polycarbonate reaction according to the present invention.

[0023] Figure 5 This is a schematic structural diagram of a cleaning structure of a catalyst filtering device for a carbon dioxide-based polycarbonate reaction according to the present invention.

[0024] In the figure, 1. mixing barrel; 2. filter barrel; 3. support frame; 4. barrel cover; 5. circulation pipe; 6. stirring mechanism; 601. rotating barrel; 602. stirring rod; 603. spiral plate; 604. guide pipe; 605. tumbling structure; 6051. transverse rod; 6052. balancing ball; 7. filtering structure; 701. mounting plate; 702. filter tube; 703. liquid storage tank; 704. connecting pipe; 8. cleaning structure; 801. rotating shaft; 802. spiral disk; 803. elastic telescopic rod; 804. supporting spring; 805. connecting plug; 9. screw pump; 10. lifting equipment; 1001. tripod; 1002. hydraulic telescopic rod; 1003. fixing rod; 11. hot water inlet pipe. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below with reference to the accompanying drawings. Example

[0026] Reference Figure 1-Figure 5 The utility model discloses a catalyst filtering device for carbon dioxide-based polycarbonate reaction, comprising a stirring barrel 1 and a filtering barrel 2. The bottom ends of the stirring barrel 1 and the filtering barrel 2 are both provided with a support frame 3. The top of the stirring barrel 1 is provided with a barrel cover 4. The side wall of the barrel cover 4 is provided with a circulation pipe 5. The interior of the barrel cover 4 is provided with a stirring mechanism 6. The interior of the filtering barrel 2 is provided with a filtering structure 7.

[0027] The filter structure 7 includes a mounting plate 701, a plurality of evenly distributed filter tubes 702 are provided at the top of the mounting plate 701, the tops of the filter tubes 702 are connected to a liquid storage tank 703, and connecting tubes 704 are provided on both sides of the liquid storage tank 703, one of which is connected to the circulation pipe 5. The outer wall of the filter tube 702 is provided with evenly distributed capillary pores, and the interior of the filter tube 702 is provided with a cleaning structure 8;

[0028] A screw pump 9 is provided at the bottom end of the mixing barrel 1 , and a discharge pipe of the screw pump 9 is connected to the bottom end of the filter barrel 2 . A plurality of lifting devices 10 are provided on the outer wall of the filter barrel 2 .

[0029] In this embodiment, when in use, the produced material is poured into the mixing barrel 1 through the feed port provided at the top of the mixing barrel 1. At the same time, a certain amount of activated carbon and diatomaceous earth are poured into the mixing barrel 1, so that the liquid, activated carbon and diatomaceous earth are mixed with each other. The activated carbon and diatomaceous earth are used to adsorb the catalyst molecules in the material, so that the catalyst and activated carbon particles are formed into larger particles.

[0030] The mixed material is then passed into the interior of the filter barrel 2 through the screw pump 9. After the mixed material enters the interior of the filter barrel 2, it contacts the filter tube 702, and the activated carbon and diatomaceous earth are filtered through the capillary pores on the surface of the filter tube 702. At this time, the activated carbon and diatomaceous earth adsorbed with the catalyst will be blocked by the capillary pores on the surface of the filter tube 702, and an activated carbon filter layer will be formed on the outer surface of the filter tube 702. The filtered liquid material will pass through the capillary tube into the interior of the filter tube 702. When the liquid material fills the filter tube 702, the cleaning structure 8 can be pushed upward, so that the liquid material can enter the interior of the liquid storage tank 703 and pass through the liquid storage tank 703. The pump installed inside 03 passes the material into the interior of the mixing barrel 1 through the connecting pipe 704 and the circulation pipe 5, and improves the uniformity of mixing between the activated carbon and diatomaceous earth and the liquid material through the stirring mechanism 6, and then performs a secondary filtration. When the material enters the interior of the filter barrel again, the material first passes through the activated carbon filter layer, and then enters the interior of the filter tube 702 through the capillary tube, and gathers in the liquid storage tank 703. Through multiple cycles of filtration, the catalyst inside the material can be effectively removed to avoid the residual catalyst inside the material affecting downstream use. After the filtration work continues for a period of time, the material is discharged through another connecting pipe 704 to enter the next production step.

[0031] In a further preferred embodiment of the present invention, Figure 1-5 As shown, the stirring mechanism 6 includes a rotating cylinder 601, which is fixedly installed inside the barrel cover 4. A stirring rod 602 is rotatably provided inside the rotating cylinder 601. A spiral plate 603 is provided at a position on the outer peripheral wall of the stirring rod 602 corresponding to the rotating cylinder 601. One end of the rotating cylinder 601 is provided with a guide pipe 604 connected to the circulation pipe 5, and the bottom end of the stirring rod 602 is provided with a rolling structure 605.

[0032] In this embodiment, the stirring rod 602 is installed by rotating the cylinder 601. When the material enters the interior of the stirring barrel 1 through the connecting pipe 704 and the circulation pipe 5, the stirring rod 602 can be pushed to rotate by the spiral plate 603, so that the rolling structure 605 at the bottom of the stirring rod 602 stirs the activated carbon and diatomaceous earth, so that the activated carbon and diatomaceous earth are mixed again with the material after the initial filtration to remove the catalyst residue inside the material and further improve the purity of the material.

[0033] In a further preferred embodiment of the present invention, Figure 1-5 As shown, the rolling structure 605 includes a transverse rod 6051 , which is fixedly connected to the bottom end of the stirring rod 602 , and balancing balls 6052 are provided at both ends of the transverse rod 6051 .

[0034] In this embodiment, by setting the transverse rod 6051, the transverse rod 6051 is rotated during the rotation of the stirring rod 602 to achieve the effect of stirring the materials, thereby improving the stirring efficiency of the activated carbon and diatomaceous earth on the catalyst. By setting the balancing ball 6052, the two ends of the transverse rod 6051 connected to the stirring rod 602 are formed into a balanced state, thereby improving the stability of the transverse rod 6051 during rotation.

[0035] In a further preferred embodiment of the present invention, Figure 1-5 As shown, the side walls of the circulation pipe 5 and the connecting pipe 704 both have hot water inlet pipes 11 extending outward.

[0036] In this embodiment, by setting the hot water inlet pipe 11, when the equipment is out of use, hot water is passed into the interior of the equipment through the hot water inlet pipe 11 at various positions to clean the equipment, thereby facilitating maintenance of the equipment.

[0037] In a further preferred embodiment of the present invention, Figure 1-5 As shown, the cleaning structure 8 includes a rotating shaft 801, the outer peripheral wall of the rotating shaft 801 is provided with a spiral disk 802, the bottom end of the rotating shaft 801 is provided with an elastic telescopic rod 803, and the outer peripheral wall of the elastic telescopic rod 803 is provided with a supporting spring 804, the bottom end of the elastic telescopic rod 803 is fixedly connected to the inner bottom wall of the filter tube 702, and the top of the rotating shaft 801 is provided with a connecting plug 805.

[0038] In this embodiment, the rotating shaft 801 is installed inside the filter tube 702 by means of a supporting spring 804 and an elastic telescopic rod 803. When the liquid inside the filter tube 702 pushes the rotating shaft 801 upward through the connecting plug 805, the supporting spring 804 is stretched. After part of the liquid is discharged, the supporting spring 804 pulls the rotating shaft 801 downward, so that the spiral disk 802 forms a vibration inside the filter tube 702, which can push the liquid inside the capillary tube in the opposite direction, effectively destroying the filter layer formed by the activated carbon on the outer surface of the filter tube 702, and after the destruction, the filter layer will be quickly reorganized under the influence of water pressure, which can effectively improve the uniformity of the filter layer and improve the filtering effect.

[0039] In a further preferred embodiment of the present invention, Figure 1-5 As shown, the lifting device 10 includes a triangular platform 1001, which is provided with multiple triangular platforms 1001 and is fixedly connected to the outer wall of the filter barrel 2. The top of the triangular platform 1001 is provided with a hydraulic telescopic rod 1002, and the top wall of the hydraulic telescopic rod 1002 is provided with a fixed rod 1003 connected to the liquid storage tank 703.

[0040] In this embodiment, a triangular platform 1001 is used to install a hydraulic telescopic rod 1002, and a fixed rod 1003 is used to connect the top of the hydraulic telescopic rod 1002 and the liquid storage tank 703. When the hydraulic telescopic rod 1002 moves upward, the liquid storage tank 703 can be pushed upward, and the filter structure 7 is moved out of the filter barrel 2 to facilitate maintenance and cleaning of the filter structure 7.

[0041] The embodiments of this specific implementation method are all preferred embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. A catalyst filtering device for carbon dioxide-based polycarbonate reaction, characterized in that: The invention comprises a mixing barrel (1) and a filtering barrel (2), wherein the bottom ends of the mixing barrel (1) and the filtering barrel (2) are both provided with a support frame (3), the top end of the mixing barrel (1) is provided with a barrel cover (4), the side wall of the barrel cover (4) is provided with a circulation pipe (5), the interior of the barrel cover (4) is provided with a mixing mechanism (6), and the interior of the filtering barrel (2) is provided with a filtering structure (7); The filter structure (7) includes a mounting plate (701), a plurality of evenly distributed filter tubes (702) are provided at the top of the mounting plate (701), the tops of the filter tubes (702) are connected to a liquid storage tank (703), connecting tubes (704) are provided on both sides of the liquid storage tank (703), one of the connecting tubes (704) is connected to the circulation tube (5), the outer wall of the filter tube (702) is provided with evenly distributed capillary pores, and a cleaning structure (8) is provided inside the filter tube (702); A screw pump (9) is provided at the bottom end of the mixing barrel (1), and a discharge pipe of the screw pump (9) is connected to the bottom end of the filter barrel (2). The outer wall of the filter barrel (2) is provided with a plurality of lifting devices (10).

2. A catalyst filtering device for carbon dioxide-based polycarbonate reaction according to claim 1, characterized in that: The stirring mechanism (6) comprises a rotating drum (601), the rotating drum (601) being fixedly mounted inside the barrel cover (4), a stirring rod (602) being rotatably arranged inside the rotating drum (601), a spiral plate (603) being arranged at a position on the outer peripheral wall of the stirring rod (602) corresponding to the rotating drum (601), a flow guide pipe (604) connected to the circulation pipe (5) being arranged at one end of the rotating drum (601), and a tumbling structure (605) being arranged at the bottom end of the stirring rod (602).

3. A catalyst filtering device for carbon dioxide-based polycarbonate reaction according to claim 2, characterized in that: The tumbling structure (605) comprises a transverse rod (6051), the transverse rod (6051) being fixedly connected to the bottom end of the stirring rod (602), and balancing balls (6052) being provided at both ends of the transverse rod (6051).

4. A catalyst filtering device for carbon dioxide-based polycarbonate reaction according to claim 3, characterized in that: The side walls of the circulation pipe (5) and the connecting pipe (704) both have hot water inlet pipes (11) extending outward.

5. A catalyst filtering device for carbon dioxide-based polycarbonate reaction according to claim 4, characterized in that: The cleaning structure (8) comprises a rotating shaft (801), the outer peripheral wall of the rotating shaft (801) is provided with a spiral disk (802), the bottom end of the rotating shaft (801) is provided with an elastic telescopic rod (803), and the outer peripheral wall of the elastic telescopic rod (803) is sleeved with a supporting spring (804), the bottom end of the elastic telescopic rod (803) is fixedly connected to the inner bottom wall of the filter tube (702), and the top end of the rotating shaft (801) is provided with a connecting plug (805).

6. A catalyst filtering device for carbon dioxide-based polycarbonate reaction according to claim 5, characterized in that: The lifting device (10) includes a triangular platform (1001), which is provided with multiple triangular platforms (1001) and fixedly connected to the outer peripheral wall of the filter barrel (2). The top of the triangular platform (1001) is provided with a hydraulic telescopic rod (1002), and the top wall of the hydraulic telescopic rod (1002) is provided with a fixed rod (1003) connected to the liquid storage tank (703).

Images