A new polymerization reaction device for laboratory synthesis of PVC

Abstract

The utility model relates to polymeric reaction device technical field discloses a new polymeric reaction device for laboratory synthesis PVC, including storage tank, reaction kettle, and storage tank and reaction kettle pass through micro -duct intercommunication, still include storage tank support, storage tank operation platform, fixed band, two stand, the appearance of storage tank support is tripod type support, and the inside of storage tank support is cylindrical hollow, and the bottom end of storage tank support is welded fixed on storage tank operation platform, the upper portion of storage tank support inside sets up round hole base, and the surface of round hole base is laid rubber buffer pad, and the size of round hole base is adapted to the storage tank of vertical plug -in, and the storage tank is inserted on round hole base, the back of storage tank operation platform extends backplate, and two stands are distributed in the left and right sides of storage tank support and are fixed on backplate, and fixed band is connected between two stands, and the storage tank is surrounded in fixed band. The safety of storage tank in the experiment process has been increased.

Description

Technical Field

[0001] This utility model relates to the field of polymerization reaction apparatus technology, and discloses a novel polymerization reaction apparatus for laboratory synthesis of PVC. Background Technology

[0002] Polyvinyl chloride (hereinafter referred to as PVC) is a granular organic compound polymerized from vinyl chloride monomer (hereinafter referred to as VCM) under specific temperature, pressure, and additive catalysis. In actual production, liquid VCM and additives such as initiators and dispersants are sequentially pumped into the reactor from their respective storage tanks. The reactor is maintained at a certain temperature and pressure and stirred for a period of time. Finally, a terminator is added to terminate the reaction, resulting in solid powdered PVC particles with a certain degree of polymerization.

[0003] Laboratory-grade small-scale polymerization reactors are miniaturized versions of large-scale industrial production equipment. They are designed to explore and master optimal process control parameters, simulate industrial production environments for performance comparison tests of various additives, and conduct other quantitative and qualitative research, thereby reducing material losses and economic losses caused by large-scale production trials.

[0004] Existing patent CN 209549465 U discloses an experimental apparatus for the polymerization reaction of vinyl chloride, including a vertical cylindrical polymerization vessel. The polymerization vessel is equipped with a temperature control tube, which is circulatedly connected to a heating circulation mechanism and a cooling circulation mechanism on the outside of the polymerization vessel. The top of the polymerization vessel is equipped with a cover, which is provided with a temperature control tube inlet, a temperature control tube outlet, a material inlet, a temperature measuring port, a nitrogen replacement interface, a pressure measuring port, a condenser interface, a stirring mechanism interface, and a vacuum interface. The bottom of the polymerization vessel is equipped with a discharge port.

[0005] The existing technology has defects, such as: (1) The functional dimensions of the device lack the convenience and safety of experiments. For example, the movable storage tank used to store VCM is not firmly fixed. Once the storage tank falls and collides, it is easy to cause toxic, harmful, flammable and explosive vinyl chloride gas to escape, which increases the safety risk of the experimental process; (2) Due to the limitation of the lifting platform, the space for manually tightening bolts in the reactor is small and difficult to operate, which does not conform to the ergonomic design; (3) There are too many tiny impurities in the raw materials, the pipe diameter is narrow and there is no matching filter. Due to the limitations of the equipment, it is impossible to clean the impurities, which can easily cause the plunger pump to be blocked and the product quality to decline. Utility Model Content

[0006] The problems to be solved by this utility model are: the movable storage tank for storing VCM is not securely fixed, posing a safety risk at the tank fixing point; the inconvenience of disassembling the vessel body; and at least one of the following problems: plunger pump blockage and product quality degradation due to the lack of a filtration system.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0008] A novel polymerization reactor for laboratory synthesis of PVC includes a storage tank and a reaction vessel, which are connected by a microchannel. It also includes a tank support, a tank operating platform, a fixing strap, and two columns. The tank support is a tripod support with a hollow cylindrical interior. The bottom of the tank support is welded and fixed to the tank operating platform. A circular hole base is provided at the upper part of the tank support, with a rubber cushioning pad on its surface. The size of the circular hole base is adapted to the vertically inserted tank, which is inserted into the circular hole base. A back plate extends from the rear of the tank operating platform. Two columns are distributed on the left and right sides of the tank support and fixed to the back plate. The fixing strap connects the two columns, and the tank is surrounded by the fixing strap.

[0009] In this technical solution, the tank support frame structure adopts a unique design.

[0010] Furthermore, it also includes a sample injection pump and a microchannel filter, which are connected in series on the microchannels of the storage tank and the reactor.

[0011] Furthermore, it also includes a sample injection pump and a microchannel filter, which are connected in series on the microchannels of the storage tank and the reactor.

[0012] Furthermore, the microchannel filter is a mesh filter, with the filter screen nested inside the outer shell of the microchannel filter.

[0013] In this technical solution, the microchannel filter adopts a self-designed microchannel filter.

[0014] Furthermore, the filter screen uses a 60-80 mesh flat-top conical wire mesh.

[0015] Furthermore, the outer shell of the micro-channel filter is a cylindrical shell with a flange sealing surface, which is divided into upper and lower parts and fixed by flange bolts. The two ends of the shell are equipped with threaded sleeves for connecting micro-channels.

[0016] Furthermore, it also includes a vessel body lifter, which includes a load-bearing rod and a load-bearing bracket. The vessel body lifter is installed on the right side of the reactor. A load-bearing lug is welded to the front and rear sides of the reactor body in a staggered manner, and a roller is provided at the bottom of the load-bearing lug. There are two load-bearing rods, and a sliding groove is opened at the top of the load-bearing rod. Each load-bearing lug is slidably connected to the sliding groove of a load-bearing rod. The load-bearing rod passes through the load-bearing bracket.

[0017] In this technical solution, the vessel lifting device is an improved vessel lifting device.

[0018] Furthermore, the vessel lifting device also includes meshing racks and gears, with two racks and two gears; each rack is horizontally fixed to the bottom of a load-bearing rod; one end of each rack is connected to a gear.

[0019] Furthermore, the vessel lifting device also includes an electric hoist, the hoist's lifting point being connected to the load-bearing bracket.

[0020] Furthermore, it also includes a vessel operating platform. The vessel lid and vessel body are detachably connected, and the vessel lid and vessel operating platform are on the same plane and are fixed as a whole.

[0021] Furthermore, it also includes a stirring motor and a fixing rod. The stirring motor is installed above the operating platform of the vessel body via the fixing rod, and the stirring motor is connected to the vessel cover.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The tank support described in this utility model is a stainless steel tripod, with its bottom end welded and fixed to the operating platform of the tank. The tank support has a hollow cylindrical interior and a circular hole base at the top. The surface of the base is covered with a rubber cushioning pad. The size of the circular hole is adapted to the vertical insertion of the tank, providing three-dimensional support. The tank support, together with the side fixing straps, ensures the safe use of the tank. This increases the safety of the tank during experiments.

[0024] 2. This utility model optimizes the design of the tank support, the vessel lifting device, and the micro-pipeline filter. By improving the tank support, the vessel lifting device, and adding the micro-pipeline filter, the entire small-scale reactor experiment operation process can be optimized. This makes the overall structure and functional dimensions of the new polymerization reaction device for laboratory PVC synthesis more ergonomic. It solves the defects in functional dimensions of the layout design of the polymerization reaction experimental device and the problem of poor purity of the final product, polyvinyl chloride. It also reduces the failure rate of pump equipment, optimizes the operation process, improves product quality, and reduces systematic errors in the experiment.

[0025] 3. The newly added micro-pipe filter in this utility model filters out tiny impurities in the raw materials, reducing the problems of feed pump blockage and product quality decline.

[0026] 4. The improved vessel lifting device of this utility model, with its time-saving and labor-saving mechanical transmission design, improves the convenience of disassembling and installing experimental equipment, and also makes the overall functional size layout of the device less cramped and more reasonable. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the novel polymerization reactor of this utility model;

[0028] Figure 2 For the present utility model Figure 1 The left side;

[0029] Figure 3 For the present utility model Figure 1 The middle part;

[0030] Figure 4 For the present utility model Figure 1 The right side;

[0031] Figure 5 For the present utility model Figure 2 A schematic diagram of the structure of a microchannel filter.

[0032] Figure label:

[0033] 1-Storage tank; 2-Fixing belt; 3-Micro-channel filter; 31-Filter screen; 32-Outer shell; 4-Storage tank support; 5-Storage tank operating platform; 8-Column; 9-Back plate; 10-Sample pump;

[0034] 11-Fixing rod; 12-Reaction vessel; 121-Vessel body; 122-Vessel cover; 123-Bearing lug; 124-Roller; 13-Vessel body lifting device; 131-Hinge; 132-Gear; 133-Bearing rod; 134-Slide groove; 135-Electrical control cabinet;

[0035] 14-Operating platform of the vessel; 15-Supporting bracket; 16-Agitator motor; 17-Electric hoist; 18-Discharge pipe; 19-Box body. Detailed Implementation

[0036] The technical solution of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are not all embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] It should be noted that the terms "center", "upper", "lower", "horizontal", "left", "right", "front", "back", "lateral", "longitudinal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] Example

[0039] Combination Figures 1-5As shown, this utility model provides a novel polymerization reaction device for laboratory synthesis of PVC, including a storage tank 1, a storage tank support 4, a storage tank operating platform 5, a sample injection pump 10, a micro-channel filter 3, a vessel operating platform 14, a reaction vessel 12, and a vessel lifting device 13.

[0040] The storage tank support 4 is a tripod support used to support storage tank 1, which is a vinyl chloride (VCM) storage tank, a container specifically used for storing vinyl chloride.

[0041] The tank support 4 is made entirely of stainless steel.

[0042] The tank support 4 has a hollow cylindrical interior. The bottom of the tank support 4 is welded and fixed to the tank operating platform 5. A circular hole base is provided in the upper part of the interior of the tank support 4. The surface of the circular hole base is covered with a rubber cushioning pad. The size of the circular hole base is adapted to the vertically inserted tank 1, and the circular hole base provides three-dimensional support for the tank 1.

[0043] The rear side of the storage tank operating platform 5 has a back plate 9.

[0044] A fixing strap 2 is attached to the front end of the storage tank 1. The two ends of the fixing strap 2 are connected to the columns 8 installed on the left and right sides of the storage tank support 4, respectively. The columns 8 are fixed to the back plate 9. The storage tank support 4 and the fixing strap 2 together ensure the safe use of the storage tank 1.

[0045] A microchannel filter 3 is connected in series on the discharge pipe 18 between the discharge port of storage tank 1 and the sampling pump 10. The discharge pipe 18 is a microchannel.

[0046] The microchannel filter 3 is a mesh filter, which, compared to filter cotton, filter rods, filter cloth, and filter membranes, can effectively reduce the clogging caused by the self-polymerization of liquid vinyl chloride (VCM) and the pressure drop in the microchannels. The filter screen 31 of the mesh filter can be made of corrosion-resistant materials such as polypropylene, polyester, and stainless steel.

[0047] like Figure 5 As shown, the filter screen 31 of the microchannel filter 3 is nested within the outer shell 32 of the microchannel filter 3, and a 60-80 mesh flat-top conical wire mesh is used to accommodate the particle size of the impurities. Considering the short-distance transport performance of the experimental microchannels, the microchannel filter 3 is designed as a direct filter.

[0048] The outer shell 32 of the microchannel filter 3 is a cylindrical shell with a flange sealing surface. The outer shell 32 is divided into upper and lower parts and is fixed by flange bolts. The two ends of the outer shell 32 are equipped with threaded sleeves for connecting microchannels. After the threaded sleeves at both ends of the outer shell 32 are connected to the microchannels, the microchannel filter 3 is connected in series between the storage tank 1 and the injection pump 10 to facilitate the stable delivery of liquid vinyl chloride VCM.

[0049] The outer shell 32 of the micro-channel filter 3 can be made of pressure-resistant and corrosion-resistant materials such as polypropylene, polyester, and stainless steel.

[0050] This invention introduces a novel micro-pipeline filter that, through targeted design of size and materials, effectively filters out minute impurities in raw materials, purifying them. This reduces problems such as feed pump clogging and product quality degradation.

[0051] The inlet of the reactor 12 is connected to the outlet of the sample pump 10 via a micro-channel.

[0052] The vessel lifting device 13 is installed on the right side of the reactor 12. The vessel lifting device 13 includes a rack 131, a gear 132, a load-bearing rod 133, an electrical control cabinet 135, a load-bearing bracket 15, and an electric hoist 17.

[0053] The reactor body 121 and the lid 122 of the reactor 12 are detachably connected, and the reactor body 121 can be removed from the lid 122. A load-bearing lug 123 is welded to the front and rear sides of the reactor body 121 at staggered heights. Rollers 124 are provided at the bottom of the load-bearing lug 123.

[0054] Two load-bearing rods 133 are provided, and a groove 134 is opened on the top of the load-bearing rods 133; each load-bearing lug 123 is slidably connected to the groove 134 of one load-bearing rod 133. This allows the vessel body 121 to move laterally along the groove 134 of the load-bearing rods 133.

[0055] When the vessel body 121 is subjected to forward and backward thrust, the load-bearing lug 123 moves forward and backward along the slide groove 134 of the load-bearing rod 133, thereby driving the entire vessel body 121 to move laterally within a small range.

[0056] The system comprises two racks 131 and two gears 132. Each rack 131 is horizontally fixed to the bottom of a supporting rod 133, and the racks 131 and supporting rods 133 can be connected by welding. The ends of the two racks 131 furthest from the vessel body 121 are each connected to a gear 132. Each gear 132 is fixed inside a housing 19 via a shaft passing through its center. The housing 19 is integrally connected to the supporting bracket 15. The supporting rod 133 and racks 131 pass through the supporting bracket 15 and the housing 19. The shaft passing through the center of each gear 132 is fixed to the housing 19.

[0057] One of the gears 132 is connected to the output shaft of the motor inside the housing 19 via a coupling, and the shafts of the two gears 132 are connected by a conveyor belt.

[0058] When the drive gear 132 rotates, the gear 132 drives the rack 131, which in turn drives the entire load-bearing rod 133 to move laterally, causing the vessel body 121 to move laterally over a wide range.

[0059] The electrical control cabinet 135 has an electric hoist 17 built in. The lifting point of the electric hoist 17 is connected to the load-bearing bracket 15. When the electric hoist 17 is started, the load-bearing bracket 15 and the box 19 move up and down together, which in turn drives the load-bearing rod 133 to drive the vessel 121 to move up and down in a short distance.

[0060] The control cabinet 135 of the vessel lifting device 13 is equipped with control and emergency stop buttons on its operating interface, which can realize the automated operation of the above process.

[0061] Both the vessel lifting device 13 and the vessel body 121 are stainless steel metal products.

[0062] The lid 122 of the reactor 12 is on the same plane as the reactor body operating platform 14 and is fixed as a whole. A fixing rod 11 is provided on the reactor body operating platform 14, and a stirring motor 16 is fixed between the fixing rods 11. A corresponding controller is connected to the stirring motor 16 to control the operation of the stirring motor 16 and perform stirring operation.

[0063] The original cooling water circuit, electrical circuit, gas circuit and raw material pipeline of the reactor 12 and stirring motor 16 are not affected by the improvement. Only the design of the platform lid 122 leaves enough space for loading and unloading the reactor body 121, which facilitates the operation of disassembling and assembling the lid 122.

[0064] The above technical features constitute the preferred embodiment of this utility model, which has strong adaptability and optimal implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the needs of different situations.

[0065] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A new polymerization reaction device for laboratory synthesis of PVC, comprising a storage tank and a reaction kettle, the storage tank and the reaction kettle being communicated through a micro-pipe; characterized in that, It also includes a tank support, a tank operating platform, a fixing strap, and two columns. The tank support is a tripod support with a hollow cylindrical interior. The bottom of the tank support is welded and fixed to the tank operating platform. A circular hole base is set in the upper part of the tank support, and a rubber cushioning pad is laid on the surface of the circular hole base. The size of the circular hole base is adapted to the vertical insertion of the tank, and the tank is inserted into the circular hole base. A back plate extends from the rear of the tank operating platform. Two columns are distributed on the left and right sides of the tank support and fixed to the back plate. The fixing strap connects the two columns, and the tank is surrounded by the fixing strap.

2. The novel polymerization reaction set up for laboratory synthesis of PVC as claimed in claim 1 wherein, It also includes a sample injection pump and a microchannel filter, which are connected in series on the microchannels of the storage tank and the reactor.

3. The novel polymerization reaction set up for laboratory synthesis of PVC as claimed in claim 2 wherein, The microchannel filter is a mesh filter, with the filter screen nested inside the outer shell of the microchannel filter.

4. The novel polymerization reaction set up for laboratory synthesis of PVC as claimed in claim 3 wherein, The filter screen uses a 60-80 mesh flat-top conical wire mesh.

5. The novel polymerization reaction set up for laboratory synthesis of PVC as claimed in claim 3 wherein, The outer shell of the microchannel filter is a cylindrical shell with a flange sealing surface. The shell is divided into upper and lower parts and is fixed by flange bolts. The two ends of the shell are equipped with threaded sleeves for connecting microchannels.

6. The novel polymerization reaction set up for laboratory synthesis of PVC as claimed in claim 1 wherein, It also includes a vessel body lifter, which includes a load-bearing rod and a load-bearing bracket. The vessel body lifter is installed on the right side of the reactor. A load-bearing lug is welded to the front and rear sides of the reactor body in a staggered manner. Rollers are provided at the bottom of the load-bearing lug. There are two load-bearing rods, and the top of the load-bearing rods has a sliding groove. Each load-bearing lug is slidably connected to the sliding groove of a load-bearing rod. The load-bearing rod passes through the load-bearing bracket.

7. The novel polymerization reactor for laboratory synthesis of PVC according to claim 6, characterized in that, The vessel lifting device also includes meshing racks and gears, with two racks and two gears; each rack is horizontally fixed to the bottom of a load-bearing rod; one end of each rack is connected to a gear.

8. The novel polymerization reactor for laboratory synthesis of PVC according to claim 7, characterized in that, The vessel lifting device also includes an electric hoist, whose lifting point is connected to the load-bearing bracket.

9. The novel polymerization reaction set up for laboratory synthesis of PVC as claimed in claim 1 wherein, It also includes a vessel operating platform. The vessel lid and vessel body are detachably connected. The vessel lid and vessel operating platform are on the same plane and are fixed as a whole.

10. The novel polymerization reaction set up for laboratory synthesis of PVC as claimed in claim 9 wherein, It also includes a stirring motor and a fixing rod. The stirring motor is installed above the operating platform of the vessel body via the fixing rod, and the stirring motor is connected to the vessel lid.

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