Crystallization removal device for thermoplastic fluorescent pigment production

Abstract

The present application relates to the crystallization removal device of thermoplastic fluorescent pigment production, including the buffer tank in communication with the reflux pipeline of reaction kettle, the removal assembly is arranged on the reflux pipeline, removal assembly includes the sleeve fixed in the left upper portion of reflux pipeline, the inner chamber of buffer tank is fixedly connected with support table, the top of support table is fixedly connected with guide rod, the top of guide rod extends to the inner chamber of sleeve in sequence and penetrates reflux pipeline and sleeve, the present application relates to fluorescent pigment production equipment technical field.The crystallization removal device of thermoplastic fluorescent pigment production effectively prevents volatile gas from forming crystallization, and can prevent the crystallization condensation adhesion inside pipeline, effectively removes crystallization while maintaining the vacuum degree in tank body and reaction kettle, ensures the product quality of fluorescent pigment.

Description

Technical Field

[0001] This invention relates to the field of fluorescent pigment production equipment technology, specifically a crystal removal device for the production of thermoplastic fluorescent pigments. Background Technology

[0002] During the production of thermoplastic fluorescent pigments, when the material inside the reactor heats up to 180°C, a large amount of volatile gas is extracted through the reflux condenser and a water jet vacuum pump. During gas discharge, due to the long pipeline, the volatile gas cools down to 115°C within the pipeline, forming crystals that adhere to the inner wall of the pipeline between 1.5m from the reactor and the jet pump. In severe cases, this can completely block the pipeline, increasing the pressure inside the reactor and posing a safety hazard. Simultaneously, byproducts from the reaction cannot be effectively discharged, affecting product quality (lower softening point, screw sticking, etc.). In practice, the pipeline needs to be disassembled and cleaned after every three batches, impacting production efficiency.

[0003] According to the decrystallization device for thermoplastic fluorescent pigments described in patent number CN205851504U, volatile gases are transported to the return pipe during use. When passing through the bend section, due to the decrease in temperature and force, some of the gas will adhere to the inner wall of the pipe, and cleaning is still required after long-term use. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a crystal removal device for the production of thermoplastic fluorescent pigments, thus solving the aforementioned problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a crystallization removal device for the production of thermoplastic fluorescent pigments, comprising a buffer tank connected to a reflux pipe of a reaction vessel, a removal assembly disposed above the reflux pipe, the removal assembly comprising a sleeve fixed to the upper left of the reflux pipe, a support platform fixedly connected to the inner cavity of the buffer tank, a guide rod fixedly connected to the top of the support platform, the top end of the guide rod passing through the reflux pipe and the sleeve sequentially and extending into the inner cavity of the sleeve, a lifting plate slidably connected to the inner cavity of the sleeve, a guide groove adapted to the guide rod being formed in the inner cavity of the lifting plate, and the top end of the sleeve being fixedly connected to the support platform. The device is connected to an electric hoist. A pull rope is fixedly connected to the bottom of the electric hoist and to the top of the lifting plate. Brush bristles are fixedly connected to the bottom of the lifting plate, abutting against the inner wall of the return pipe. A lifting cylinder is fixedly connected to the top of the lifting plate, slidingly connected to the inner cavity of the sleeve. A one-way air outlet is provided at the bottom of the lifting plate. An air inlet pipe connected to an external fan is connected to the top of the sleeve. An atomizing nozzle connected to an external water pump is located on the right side of the connection between the buffer tank and the return pipe. During use, high-temperature volatile gases are transported into the return pipe and maintained at a high temperature through insulation cotton. It does not crystallize before being transported to the buffer tank. During transport, the fan blows air out of the inlet pipe, and hot air is blown out through the one-way air outlet of the lifting plate, forming a downward airflow. This creates negative pressure at the right end of the return pipe, pressurizing and extracting the volatile gas, preventing it from accumulating and crystallizing in the return pipe. The volatile gas transported to the buffer tank is cooled and washed by the atomizing nozzle, and the crystals fall to the bottom of the buffer tank and are discharged through the discharge valve. After a period of use, the volatile gas on the left side of the return pipe will inevitably gradually cool down during transport, and the transport speed will decrease, causing some to adhere to the inner wall of the pipe. At this time, the electric hoist is activated to lower and pull it out. Under the influence of gravity, the lifting plate moves the lifting cylinder downwards within the sleeve, cleaning the inner wall of the return pipe with brushes, pushing the internal crystals into the buffer tank, and providing localized sealing through the lifting cylinder. Simultaneously, the lifting plate's bottom one-way vent continuously blows air to clean the pipe. After cleaning, the electric hoist retracts the rope, lifting the lifting plate back to its original position. This effectively prevents the formation of crystals from volatile gases and prevents crystals from condensing and adhering inside the pipe. While effectively removing crystals, it maintains the vacuum level within the tank and reactor, ensuring the quality of the fluorescent pigment product.

[0006] As a further aspect of the present invention: the reflux pipe is a U-shaped pipe with both ends facing downwards, the lower left end of the U-shaped pipe is connected to the top of the reactor and the overall length is less than 1.5 meters.

[0007] As a further aspect of the present invention: the top of the reactor is fixedly connected with heat-insulating cotton covering the surface of the reflux pipe. The heat-insulating cotton is used to keep the reflux pipe warm and prevent its internal temperature from dropping below 115 degrees Celsius to form crystals.

[0008] As a further aspect of the present invention: two guide rods are provided and symmetrically arranged in the inner cavity of the sleeve, so that the lifting plate can move up and down more smoothly through the guide rods.

[0009] As a further aspect of the present invention: a friction ring is fixedly connected to the surface of the lifting plate that contacts the inside of the sleeve, and an inclined surface is provided at the bottom of the lifting plate to facilitate sliding into the return pipe, and the friction ring reduces the friction between the sleeve and the lifting plate.

[0010] As a further aspect of the present invention: the sleeve is a hollow round tube with the same diameter as the return pipe and sealed at the top. The lifting plate is accommodated by the sleeve, which can prevent the lifting plate from interfering with the normal operation of the return pipe.

[0011] As a further aspect of the present invention: the lifting cylinder and the sleeve are slidably sealed, and the gap between the lifting plate and the sleeve is sealed by the sleeve to prevent the airflow in the return pipe from entering the sleeve and forming sedimentation inside the sleeve.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. This invention effectively prevents volatile gases from forming crystals and prevents crystals from condensing and adhering inside the pipes. While effectively removing crystals, it maintains the vacuum level inside the tank and reactor, thus ensuring the product quality of fluorescent pigments.

[0014] 2. In this invention, when the pull rope is lowered, the lifting plate moves the lifting cylinder downwards within the sleeve under the action of gravity. The brushes clean the inner wall of the return pipe, pushing the internal crystals into the buffer tank. The lifting cylinder provides local sealing, and while descending, the one-way air outlet at the bottom of the lifting plate continuously blows air to clean, resulting in a good cleaning effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a cross-sectional view of the structure of the present invention;

[0017] Figure 3 For the present invention Figure 2 A magnified view of a section at point A in the middle;

[0018] Figure 4 For the present invention Figure 2A magnified view of a section at point B in the middle;

[0019] Figure 5 For the present invention Figure 2 A magnified view of a section at point C.

[0020] In the diagram: 1. Reactor; 2. Reflux pipe; 3. Buffer tank; 4. Sleeve; 5. Lifting plate; 6. Lifting cylinder; 7. One-way vent; 8. Inclined surface; 9. Guide groove; 10. Guide rod; 11. Support platform; 12. Atomizing nozzle; 13. Pull rope; 14. Electric hoist; 15. Air inlet pipe; 16. Insulation cotton; 17. Brush bristles. Detailed Implementation

[0021] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0022] Please see Figure 1-5This invention provides a technical solution: a crystallization removal device for the production of thermoplastic fluorescent pigments, comprising a buffer tank 3 connected to a return pipe 2 of a reaction vessel 1, a removal assembly above the return pipe 2, the removal assembly including a sleeve 4 fixed to the upper left of the return pipe 2, a support platform 11 fixedly connected to the inner cavity of the buffer tank 3, a guide rod 10 fixedly connected to the top of the support platform 11, the top end of the guide rod 10 passing through the return pipe 2 and the sleeve 4 and extending into the inner cavity of the sleeve 4, a lifting plate 5 slidably connected to the inner cavity of the sleeve 4, a guide groove 9 adapted to the guide rod 10 being opened in the inner cavity of the lifting plate 5, and an electric hoist 14 fixedly connected to the top of the sleeve 4. The bottom of the hoist 14 is fixedly connected to a pull rope 13, which is also fixedly connected to the top of the lifting plate 5. The bottom of the lifting plate 5 is fixedly connected to bristles 17 that abut against the inner wall of the return pipe 2. The top of the lifting plate 5 is fixedly connected to a lifting cylinder 6 that slides within the inner cavity of the sleeve 4. A one-way air outlet 7 is provided at the bottom of the lifting plate 5. The top of the sleeve 4 is connected to an air inlet pipe 15 that connects to an external fan. The inner cavity on the right side of the connection between the buffer tank 3 and the return pipe 2 is connected to an atomizing nozzle 12 that connects to an external water pump. During use, high-temperature volatile gases are transported into the return pipe 2 and kept at a high temperature by insulation cotton 16, preventing crystallization during transport. Inside the buffer tank 3, during transport, the fan blows air out of the inlet pipe 15. Hot air is blown out through the one-way outlet 7 of the lifting plate 5, forming a downward airflow. This creates negative pressure at the right end of the return pipe 2, pressurizing and extracting the volatile gas to prevent it from accumulating and crystallizing in the return pipe 2. The volatile gas transported to the buffer tank 3 is cooled and washed by the atomizing nozzle 12, and the crystals fall into the bottom of the buffer tank 3 and are discharged through the discharge valve. After a period of use, the volatile gas on the left side of the return pipe 2 will inevitably gradually cool down during transport, and the transport speed will decrease, causing some to adhere to the inner wall of the pipe. At this time, the electric hoist 14 is started, and the pull rope 13 is lowered under gravity. Under the action of the lifting plate 5, the lifting cylinder 6 moves downward in the sleeve 4, and the inner wall of the return pipe 2 is cleaned by the brush 17, pushing the internal crystals into the buffer tank 3. The lifting cylinder 6 is set to achieve local sealing. At the same time as it descends, the one-way air outlet 7 at the bottom of the lifting plate 5 continuously blows air to clean. After cleaning is completed, the electric hoist 14 drives the pull rope 13 to retract, and drives the lifting plate 5 to rise and reset. This can effectively prevent the formation of crystals from volatile gases and prevent crystals from condensing and adhering inside the pipe. While effectively removing crystals, it can maintain the vacuum degree in the tank and the reaction vessel, ensuring the product quality of fluorescent pigments.

[0023] The reflux pipe 2 is a U-shaped pipe with both ends facing downwards. The lower left end of the U-shaped pipe is connected to the top of the reactor 1 and the overall length is less than 1.5 meters.

[0024] The top of the reactor 1 is fixedly connected with insulation cotton 16 covering the surface of the reflux pipe 2. The insulation cotton 16 is used to keep the reflux pipe 2 warm and prevent its internal temperature from dropping below 115 degrees Celsius to form crystals.

[0025] Two guide rods 10 are provided and are symmetrically arranged in the inner cavity of the sleeve 4. The guide rods 10 make the lifting plate 5 rise and fall more smoothly.

[0026] A friction ring is fixedly connected to the surface of the lifting plate 5 that contacts the inside of the sleeve 4. An inclined surface 8 is provided at the bottom of the lifting plate 5, which facilitates sliding into the return pipe 2. The friction ring reduces the friction between the sleeve 4 and the lifting plate 5.

[0027] Sleeve 4 is a hollow round pipe with the same diameter as the return pipe 2 and sealed at the top. The lifting plate 5 is accommodated by sleeve 4, which can prevent the lifting plate 5 from interfering with the normal operation of the return pipe 2.

[0028] The lifting cylinder 6 and the sleeve 4 slide and seal, and the sleeve 4 seals the gap between the lifting plate 5 and the sleeve 4 to prevent the airflow in the return pipe 2 from entering the sleeve 4 and forming sedimentation inside the sleeve 4.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A crystal removal device for the production of thermoplastic fluorescent pigments, comprising a buffer tank (3) connected to a reflux pipe (2) of a reaction vessel (1), wherein a removal assembly is provided above the reflux pipe (2), characterized in that: The cleaning assembly includes a sleeve (4) fixed to the upper left of the return pipe (2). A support platform (11) is fixedly connected to the inner cavity of the buffer tank (3). A guide rod (10) is fixedly connected to the top of the support platform (11). The top end of the guide rod (10) passes through the return pipe (2) and the sleeve (4) sequentially and extends into the inner cavity of the sleeve (4). A lifting plate (5) is slidably connected to the inner cavity of the sleeve (4). The inner cavity of the lifting plate (5) has an opening adapted to the guide rod (10). The guide groove (9) is fixedly connected to the top of the sleeve (4) by an electric hoist (14), and the bottom of the electric hoist (14) is fixedly connected to a pull rope (13) that is fixedly connected to the top of the lifting plate (5). The bottom of the lifting plate (5) is fixedly connected to a brush (17) that abuts against the inner wall of the return pipe (2). The top of the lifting plate (5) is fixedly connected to a lifting cylinder (6) that is slidably connected to the inner cavity of the sleeve (4). The bottom of the lifting plate (5) is provided with a one-way air outlet. (7) The top of the sleeve (4) is connected to an air inlet pipe (15) that is connected to an external fan. The inner cavity on the right side of the connection between the buffer tank (3) and the return pipe (2) is connected to an atomizing nozzle (12) that is connected to an external water pump. The return pipe (2) is a U-shaped pipe with both ends facing downwards. The lower left end of the U-shaped pipe is connected to the top of the reactor (1) and the overall length is less than 1.5 meters. The top of the reactor (1) is fixedly connected to a heat insulation cotton (1) covering the surface of the return pipe (2). 6) Two guide rods (10) are provided and are symmetrically arranged in the inner cavity of the sleeve (4). A friction ring is fixedly connected to the surface of the lifting plate (5) in contact with the inside of the sleeve (4). An inclined surface (8) is opened at the bottom of the lifting plate (5). The sleeve (4) is a hollow round tube with the same diameter as the return pipe (2) and sealed at the top. The lifting cylinder (6) and the sleeve (4) are slidably sealed. The gap between the lifting plate (5) and the sleeve (4) is sealed by the sleeve (4).

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