Processing equipment and process of fluorescent whitening agent for PVC (polyvinyl chloride) plastic
By providing a processing equipment for PVC plastic fluorescent whitening agent including a multi-step process and specific equipment components, the problems of low equipment efficiency, insufficient precision, unoptimized process, unstable raw material supply, high energy consumption and difficult maintenance in the prior art are solved, and efficient and stable production processes and high-quality products are achieved.
Patent Information
- Application Number
- CN202411833725.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-03-28
AI Technical Summary
The existing processing equipment and its processes for fluorescent whitening agents for PVC plastics have problems such as low equipment efficiency, insufficient equipment accuracy, insufficient process steps, unstable raw material selection and supply, high energy consumption, and difficult equipment maintenance.
It provides a processing equipment and process of fluorescent whitening agent for PVC plastics, including raw material preparation and selection, chemical synthesis reaction, reaction product neutralization and precipitation separation, solid-liquid separation and filtration treatment, multiple washing and purification, dehydration and drying, crushing and fine grinding treatment, screening and particle size control, sealing packaging and labeling, etc. The equipment includes a drying cabinet, a suction sealing door, a sealing plate and a breathing structure. These components effectively control the air circulation and air pressure to ensure the efficiency and stability of the drying process.
It improves production efficiency, improves product quality stability, reduces production costs, improves product performance, and improves safety and environmental protection.
Smart Images
Figure CN119701814A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of fluorescent whitening agents for PVC plastics, and in particular relates to processing equipment and a process for the fluorescent whitening agents for PVC plastics. Background Art
[0002] PVC plastics are widely used in industry and daily life, and the requirements for their whiteness and appearance are increasing. Fluorescent brighteners, as an important functional additive, can effectively improve the whiteness and visual absorption characteristics of PVC products. However, its processing technology and equipment face some challenges and limitations in actual production.
[0003] With the advancement of science and technology and the increase in market demand, the processing technology and equipment of fluorescent brighteners for PVC plastics are facing the trend of technological upgrading and optimization. The emergence of new generation equipment and technologies, such as automated control systems, intelligent equipment and environmentally friendly material processing technologies, is gradually improving the bottlenecks and shortcomings of traditional processes.
[0004] In terms of technology, the trend is to simplify steps, improve operating efficiency and reduce energy consumption, while emphasizing product quality and environmental friendliness. In terms of equipment, the pursuit of higher precision, lower energy consumption and safer operation is to adapt to increasingly stringent industry standards and market demands.
[0005] However, the existing processing equipment and processes for fluorescent whitening agents for PVC plastics have problems such as low equipment efficiency, insufficient equipment precision, insufficient optimization of process steps, unstable selection and supply of raw materials, high energy consumption, and difficult equipment maintenance.
[0006] Therefore, it is very necessary to invent a processing equipment and a process for producing fluorescent whitening agents for PVC plastics. Summary of the invention
[0007] In order to solve the above technical problems, the present invention provides a processing equipment and process for fluorescent whitening agent for PVC plastic, so as to solve the problems of low equipment efficiency, insufficient equipment precision, insufficient optimization of process steps, unstable selection and supply of raw materials, high energy consumption and difficult equipment maintenance in the existing processing equipment and process for fluorescent whitening agent for PVC plastic.
[0008] A processing device and process for a fluorescent whitening agent for PVC plastics, characterized in that: first, raw materials are prepared and selected; after the raw materials are prepared, they need to be subjected to a chemical synthesis reaction; after the treatment is completed, the reaction products are neutralized and separated by precipitation; then solid-liquid separation and filtration treatment are performed; then washing and purification are performed multiple times; then dehydration and drying are performed; then crushing and fine grinding treatment are performed; then screening and particle size control are performed; and finally the finished products are sealed, packaged and labeled.
[0009] Preferably, the raw material preparation and selection selects and prepares high-purity starting materials, such as benzaldehyde, aniline, p-chloroaniline, etc., to ensure the stable quality of the raw materials required for the reaction.
[0010] Preferably, in the chemical synthesis reaction process, a specific chemical reaction, such as a condensation reaction, a chlorination reaction, a coupling reaction, etc., is carried out in a reactor to form the core structure of the fluorescent whitening agent.
[0011] Preferably, the reaction product is separated by neutralization and precipitation, and the mixture after the reaction is neutralized to precipitate the generated fluorescent whitening agent from the solution and precipitate a solid product.
[0012] Preferably, the solid-liquid separation and filtration treatment separates the precipitate from the liquid by filtering equipment, removes impurities and unreacted raw materials in the solution, and obtains a preliminarily purified fluorescent whitening agent.
[0013] Preferably, the multiple washing purification uses a suitable solvent, such as water or alcohol, to wash the filtered precipitate multiple times to remove residual reaction by-products and solvents, thereby improving product purity.
[0014] Preferably, the dehydration and drying is to dehydrate and dry the washed wet product through a drying device to remove water or solvent to obtain a dry fluorescent whitening agent powder.
[0015] Preferably, the crushing and fine grinding treatment is to crush and grind the dried fluorescent whitening agent so that its particle size reaches the required fineness, thereby ensuring the uniformity and application effect of the product.
[0016] Preferably, the screening and particle size control is to screen the crushed fluorescent whitening agent through a screening device to remove unqualified particles and ensure the consistency and stability of the product particle size.
[0017] Preferably, the sealed packaging and labeling are to seal the qualified fluorescent whitening agent products to prevent moisture and contamination, and indicate product information such as batch number, production date, specifications, etc. on the packaging.
[0018] A processing device and process for a fluorescent brightener for PVC plastics comprises the following steps:
[0019] Step 1: Raw material preparation and selection;
[0020] Step 2: Chemical synthesis reaction process;
[0021] Step 3: neutralization and precipitation separation of reaction products;
[0022] Step 4: solid-liquid separation and filtration treatment;
[0023] Step 5: multiple washing and purification;
[0024] Step 6: Dehydration and drying;
[0025] Step 7: crushing and fine grinding;
[0026] Step 8: Screening and particle size control;
[0027] Step 9: Seal the package and label it.
[0028] The processing equipment of fluorescent whitening agent for PVC plastic is characterized in that it includes a drying cabinet, a raw material placement plate, a push-pull structure, a lower heating structure, an upper heating structure, an air intake sealing door, an exhalation plug hole, a sealing plate, and a breathing structure, wherein: the raw material placement plate is slidably installed inside the drying cabinet through slide rails on both sides, and the push-pull structure is fixedly installed at the front end of each group of raw material placement plates, and the lower heating structure is fixedly installed at the bottom of the drying cabinet; the upper heating structure is fixedly installed on the top of the drying cabinet, and the air intake sealing door is installed on the front side of the drying cabinet through a hinge, and the exhalation plug hole is opened on both sides of the drying cabinet; the sealing plate is installed on both sides of the drying cabinet through a hinge and covers the surface of the exhalation plug hole; the breathing structure is fixedly installed on the back of the drying cabinet.
[0029] The air intake sealing door includes a sealing door panel, a connecting seat, an air intake pipe, a moisture filter housing, a filter filling and a protective net, and the sealing door panel is installed on the front side of the drying cabinet through a hinge, and the connecting seat is fixedly installed inside the sealing door panel; the air intake pipe is fixedly installed inside the connecting seat, and the moisture filter housing is fixedly installed on the outer end of the air intake pipe, and the filter filling is filled inside the moisture filter housing; the protective net is fixedly installed on the top of the moisture filter housing.
[0030] The breathing structure includes a connecting frame, a breathing airbag, a reinforcing frame, a supporting plate and a breathing push rod, and the connecting frame is fixedly installed on the back of the drying cabinet, and the breathing airbag is fixedly installed on the surface of the connecting frame; the reinforcing frame is fixedly installed inside the breathing airbag, and the supporting plate is fixedly installed at the rear end of the breathing airbag, and the breathing push rod is fixedly installed between the supporting plate and the drying cabinet.
[0031] The air intake sealing door adopts a group of metal doors, and a sealing strip is arranged on the inner wall of the air intake sealing door; the connecting seats adopt a plurality of them, and are arranged vertically and horizontally inside the sealing door plate, and the air intake pipe adopts a plurality of them, and are respectively arranged inside each group of connecting seats, and the sealing door plate and the connecting seat are penetrated, and a group of one-way valves are arranged inside the air intake pipe; the moisture filter shell adopts a plastic shell, and the filter filling inside the moisture filter shell adopts moisture-proof filter material, and the protective net adopts a circular metal net, which has the following functions: ① Control the air intake: the air intake sealing door effectively controls the gas flow inside and outside the drying cabinet through the components such as the sealing door plate, the air intake pipe and the moisture filter shell. It ensures that during the drying process, the outside air can enter the drying cabinet through the filter filling in the moisture filter shell to provide the fresh air required for drying; ② Prevent moisture from entering: the moisture filter shell and filter filling of the air intake sealing door are used to filter moisture and impurities in the outside air, prevent humid air from entering the drying cabinet, so as to keep the internal environment dry and ensure the drying effect of the fluorescent whitening agent.
[0032] The sealing plate is made of several rectangular metal plates, and the number of sealing plates is consistent with the exhalation plug hole. The sealing plate sags due to gravity and completely covers the surface of the exhalation plug hole. A layer of silicone sheet is bonded to the inner wall of the sealing plate. The sealing plate can only be flipped outwards and cannot be rotated inwards. It has the following functions: ① One-way airflow control: The sealing plate is designed to be able to be flipped outwards and cannot be rotated inwards. This design ensures that when the pressure inside the drying cabinet is higher than that outside, the exhalation plug hole can be exhausted to the outside through the sealing plate, but the outside air cannot enter the drying cabinet through the sealing plate. This can effectively control the internal air pressure and prevent the outside air and moisture from entering. ② Maintaining the stability of the drying environment: The sealing plate ensures that during the drying process, only the excess humid gas inside can be discharged, and the outside air cannot enter, thereby maintaining the stability of the environment inside the drying cabinet, which helps to improve the drying efficiency and product quality.
[0033] The breathing structure is an airbag as a whole, and the breathing airbag drives the support plate to bulge or deflate through the breathing push rod; when the breathing airbag deflates, the gas inside the drying cabinet is squeezed out from the exhalation plug hole to form an exhalation state; when the breathing airbag bulges, the external gas is sucked into the drying cabinet from the air inhalation seal door to form an inhalation state; the breathing airbag "breathes" through continuous swelling and deflation, which has the following functions: ① Regulating airflow: The breathing structure can regulate the airflow inside the drying cabinet through the swelling and deflation of the breathing airbag. Through this "breathing" action, the breathing structure can effectively control the flow and exchange of internal gas and maintain the dynamic balance of the drying process; ② Promote drying efficiency: By adjusting the airflow and air pressure, the breathing structure can promote the evaporation and discharge of water or solvents and improve the drying efficiency. Appropriate airflow helps to evenly distribute heat and accelerate the dehydration and drying process of wet products.
[0034] Compared with the prior art, the present invention has the following beneficial effects:
[0035] 1. The setting of the air intake sealing door of the present invention has the following functions: 1. Controlling air intake: The air intake sealing door effectively controls the gas flow inside and outside the drying cabinet through components such as the sealing door panel, the air intake pipe and the moisture filter housing. It ensures that during the drying process, the outside air can enter the drying cabinet through the filter filling in the moisture filter housing to provide fresh air required for drying; 2. Preventing moisture from entering: The moisture filter housing and filter filling of the air intake sealing door are used to filter moisture and impurities in the outside air to prevent humid air from entering the drying cabinet, so as to keep the internal environment dry and ensure the drying effect of the fluorescent whitening agent.
[0036] 2. The setting of the sealing plate of the present invention has the following functions: ① One-way airflow control: The sealing plate is designed to be able to flip outward only and cannot be rotated inward. This design ensures that when the pressure inside the drying cabinet is higher than that outside, the exhalation plug hole can be exhausted to the outside through the sealing plate, but the outside air cannot enter the drying cabinet through the sealing plate, which can effectively control the internal air pressure and prevent the outside air and moisture from entering; ② Maintaining the stability of the drying environment: The sealing plate ensures that during the drying process, only the excess humid gas inside can be discharged, and the outside air cannot enter, thereby maintaining the stability of the environment inside the drying cabinet, which helps to improve the drying efficiency and product quality.
[0037] 3. The setting of the breathing structure of the present invention has the following functions: ① Regulating the airflow: The breathing structure can regulate the airflow inside the drying cabinet by the inflation and deflation of the breathing airbag.
[0038] "Breathing" action: the breathing structure can effectively control the flow and exchange of internal gas and maintain the dynamic balance of the drying process; ②Promote drying efficiency: by adjusting the airflow and air pressure, the breathing structure can promote the evaporation and discharge of water or solvent and improve the drying efficiency. Appropriate airflow helps to evenly distribute heat and accelerate the dehydration and drying process of wet products. BRIEF DESCRIPTION OF THE DRAWINGS
[0039] Figure 1 This is the processing flow chart of fluorescent brightener for PVC plastic.
[0040] Figure 2 It is a schematic diagram of the structure of the processing equipment for fluorescent brighteners for PVC plastics.
[0041] Figure 3 This is a second perspective diagram of the processing equipment for fluorescent brighteners for PVC plastics.
[0042] Figure 4 It is a structural schematic diagram of the air suction sealing door of the present invention.
[0043] Figure 5 It is a schematic diagram of the breathing structure of the present invention.
[0044] In the figure:
[0045] Drying cabinet 1, raw material placement plate 2, push-pull structure 3, lower heating structure 4, upper heating structure 5, air intake sealing door 6, sealing door plate 61, connecting seat 62, air inlet pipe 63, moisture filter shell 64, filter filling 65, protective net 66, exhalation plug hole 7, sealing plate 8, breathing structure 9, connecting frame 91, breathing airbag 92, reinforcement frame 93, support plate 94, breathing push rod 95. DETAILED DESCRIPTION
[0046] The present invention is further described below in conjunction with the accompanying drawings:
[0047] In the figure:
[0048] As attached Figures 1 to 5 Shown
[0049] A processing technology of a fluorescent whitening agent for PVC plastic specifically includes: The processing technology of a fluorescent whitening agent for PVC plastic specifically includes: first: preparing and selecting raw materials; after the raw materials are prepared, they need to be subjected to a chemical synthesis reaction; after the treatment is completed, the reaction products are neutralized and separated from the precipitate; then solid-liquid separation and filtration treatment are performed; then multiple washing and purification are performed; then dehydration and drying are performed; then crushing and fine grinding treatment is performed; then screening and particle size control are performed; and finally the finished products are sealed, packaged and labeled.
[0050] Preferably, the raw material preparation and selection selects and prepares high-purity starting materials, such as benzaldehyde, aniline, p-chloroaniline, etc., to ensure the stable quality of the raw materials required for the reaction.
[0051] In the chemical synthesis reaction process, a specific chemical reaction, such as condensation reaction, chlorination reaction, coupling reaction, etc., is carried out in a reaction vessel to form the core structure of the fluorescent whitening agent.
[0052] Preferably, the reaction product is separated by neutralization and precipitation, and the mixture after the reaction is neutralized to precipitate the generated fluorescent whitening agent from the solution and precipitate a solid product.
[0053] Preferably, the solid-liquid separation and filtration treatment separates the precipitate from the liquid by filtering equipment, removes impurities and unreacted raw materials in the solution, and obtains a preliminarily purified fluorescent whitening agent.
[0054] Preferably, the multiple washing purification uses a suitable solvent, such as water or alcohol, to wash the filtered precipitate multiple times to remove residual reaction by-products and solvents, thereby improving product purity.
[0055] Preferably, the dehydration and drying is to dehydrate and dry the washed wet product through a drying device to remove water or solvent to obtain a dry fluorescent whitening agent powder.
[0056] Preferably, the crushing and fine grinding treatment is to crush and grind the dried fluorescent whitening agent so that its particle size reaches the required fineness, thereby ensuring the uniformity and application effect of the product.
[0057] Preferably, the screening and particle size control is to screen the crushed fluorescent whitening agent through a screening device to remove unqualified particles and ensure the consistency and stability of the product particle size.
[0058] Preferably, the sealed packaging and labeling are to seal the qualified fluorescent whitening agent products to prevent moisture and contamination, and indicate product information such as batch number, production date, specifications, etc. on the packaging.
[0059] The processing equipment of fluorescent whitening agent for PVC plastic includes a drying cabinet 1, a raw material placement plate 2, a push-pull structure 3, a lower heating structure 4, an upper heating structure 5, an air intake sealing door 6, an exhalation plug hole 7, a sealing plate 8, and a breathing structure 9, wherein: the raw material placement plate 2 is slidably installed inside the drying cabinet 1 through slide rails on both sides, and the push-pull structure 3 is fixedly installed at the front end of each group of raw material placement plates 2, and the lower heating structure 4 is fixedly installed at the bottom of the drying cabinet 1; the upper heating structure 5 is fixedly installed on the top of the drying cabinet 1, and the air intake sealing door 6 is installed on the front side of the drying cabinet 1 through a hinge, and the exhalation plug hole 7 is opened on both sides of the drying cabinet 1; the sealing plate 8 is installed on both sides of the drying cabinet 1 through a hinge, and covers the surface of the exhalation plug hole 7; the breathing structure 9 is fixedly installed on the back of the drying cabinet 1.
[0060] Preferably, the air intake sealing door 6 includes a sealing door panel 61, a connecting seat 62, an air intake pipe 63, a moisture filter shell 64, a filter filling 65 and a protective net 66, and the sealing door panel 61 is installed on the front side of the drying cabinet 1 through a hinge, and the connecting seat 62 is fixedly installed inside the sealing door panel 61; the air intake pipe 63 is fixedly installed inside the connecting seat 62, and the moisture filter shell 64 is fixedly installed on the outer end of the air intake pipe 63, and the filter filling 65 is filled inside the moisture filter shell 64; the protective net 66 is fixedly installed on the top of the moisture filter shell 64.
[0061] Preferably, the breathing structure 9 includes a connecting frame 91, a breathing airbag 92, a reinforcing frame 93, a support plate 94 and a breathing push rod 95, and the connecting frame 91 is fixedly mounted on the back of the drying cabinet 1, and the breathing airbag 92 is fixedly mounted on the surface of the connecting frame 91; the reinforcing frame 93 is fixedly mounted inside the breathing airbag 92, and the support plate 94 is fixedly mounted at the rear end of the breathing airbag 92, and the breathing push rod 95 is fixedly mounted between the support plate 94 and the drying cabinet 1.
[0062] Preferably, the air intake sealing door 6 adopts a group of metal doors, and a sealing strip is provided on the inner wall of the air intake sealing door 6; the connecting seats 62 adopt a plurality of them, and are arranged vertically and horizontally inside the sealing door plate 61, and the air intake pipes 63 adopt a plurality of them, and are respectively arranged inside each group of connecting seats 62, and penetrate the sealing door plate 61 and the connecting seats 62, and a group of one-way valves are provided inside the air intake pipe 63; the moisture filter shell 64 adopts a plastic shell, and the filter filling 65 inside the moisture filter shell 64 adopts moisture-proof filter material, and the protective net 66 adopts a circular metal net.
[0063] Preferably, the sealing plate 8 is made of a plurality of rectangular metal plates, and the number of the sealing plates 8 is consistent with the exhalation plug hole 7. The sealing plate 8 sags due to gravity and completely covers the surface of the exhalation plug hole 7. A layer of silicone sheet is bonded to the inner wall of the sealing plate 8. The sealing plate 8 can only be flipped outward and cannot be rotated inward.
[0064] Preferably, the breathing structure 9 is an airbag as a whole, and the breathing airbag 92 drives the support plate 94 to bulge or deflate through the breathing push rod 95; when the breathing airbag 92 deflates, the gas inside the drying cabinet 1 is squeezed outward from the exhalation plug hole 7 to form an exhalation state; when the breathing airbag 92 bulges, the external gas is sucked into the drying cabinet 1 from the air intake sealing door 6 to form an inhalation state; the breathing airbag 92 "breathes" by continuously swelling and deflation.
[0065] A processing technology for a fluorescent brightener for PVC plastics comprises the following steps:
[0066] S101: Raw material preparation and selection;
[0067] S101: Chemical synthesis reaction process;
[0068] S101: neutralization and precipitation separation of reaction products;
[0069] S101: solid-liquid separation and filtration treatment;
[0070] S101: multiple washing and purification;
[0071] S101: dehydration and drying;
[0072] S101: crushing and fine grinding;
[0073] S101: Screening and particle size control;
[0074] S101: Sealed packaging and labeling
[0075] Compared with the prior art, the present invention has the following beneficial effects: improving production efficiency, enhancing product quality stability, reducing production costs, improving product performance, and enhancing safety and environmental protection.
[0076] The present invention is further described below with reference to the embodiments.
[0077] The steps proposed in the embodiments of the present invention solve the problems of low equipment efficiency, insufficient equipment precision, insufficient optimization of process steps, unstable raw material selection and supply, high energy consumption and difficult equipment maintenance in the existing processing equipment and process of fluorescent whitening agent for PVC plastic.
[0078] Step 1: Raw material preparation and selection
[0079] Select and prepare the following high purity raw materials:
[0080] Benzaldehyde: 99.5% purity, 500 g
[0081] Aniline: 99.5% purity, 400 g
[0082] p-Chloroaniline: 99.5% purity, 300 g
[0083] Step 2: Chemical synthesis reaction
[0084] Chemical synthesis reactions are carried out in reactors:
[0085] 500 g of benzaldehyde, 400 g of aniline and 300 g of p-chloroaniline were added into a reaction kettle.
[0086] Under stirring, the reactor was heated to 80° C. and the temperature was maintained for 2 hours to carry out the condensation reaction.
[0087] The temperature was then raised to 100°C and stirring was continued for 3 hours to carry out a chlorination reaction.
[0088] Finally, a coupling agent was added, and the reaction temperature was maintained at 120° C. for a coupling reaction for 1 hour.
[0089] Step 3: Neutralization and Separation
[0090] After the reaction was completed, 10% sodium hydroxide solution was added dropwise to the reaction mixture to carry out a neutralization reaction.
[0091] When the pH value of the solution reaches 7, stop adding the sodium hydroxide solution and the fluorescent whitening agent begins to precipitate out of the solution.
[0092] Step 4: Solid-liquid separation and filtration
[0093] The precipitated mixture is filtered through filter paper to collect the solid precipitate and remove impurities and unreacted raw materials in the solution.
[0094] Step 5: Multiple washing and purification
[0095] The solid fluorescent brightener obtained initially was placed in a washing tank, washed with distilled water for 3 times, using 1 liter of distilled water each time, stirred for 5 minutes and then filtered.
[0096] The mixture was then washed twice with 300 ml of ethanol, stirred for 5 minutes each time and then filtered.
[0097] Step 6: Dehydration and drying
[0098] Put the washed wet fluorescent brightener into the drying equipment for dehydration and drying. The specific operation is as follows:
[0099] The wet fluorescent brightener is evenly spread on the raw material placement plate 2.
[0100] Push it into the drying cabinet 1, set the temperature of the lower heating structure 4 and the upper heating structure 5 to 60°C, and dry for 4 hours.
[0101] Step 7: Crushing and fine grinding
[0102] The dried fluorescent whitening agent is crushed by a pulverizer and then finely ground in a grinding device to ensure that the particle size reaches less than 10 microns.
[0103] Step 8: Screening and particle size control
[0104] The crushed fluorescent whitening agent is sieved through a 200-mesh sieve to remove larger particles and ensure the consistency of the product particle size.
[0105] Step 9: Sealing and labeling
[0106] Put the qualified fluorescent brighteners into sealed bags and seal them to prevent moisture and contamination.
[0107] Indicate product information on the packaging, including batch number, production date and specifications.
[0108] Working details of drying equipment
[0109] Drying equipment structure
[0110] Drying cabinet 1: Ensures tightness and temperature stability during drying.
[0111] Raw material placement plate 2: The slide rail design makes it easy to place and remove raw materials.
[0112] Push-pull structure 3: facilitates operators to move the raw material placement plate 2.
[0113] The lower heating structure 4 and the upper heating structure 5 provide uniform heat to ensure uniform drying of the raw materials.
[0114] The air intake sealing door 6 and the air exhalation plug hole 7 are used to control the flow of air inside and outside the drying cabinet 1.
[0115] Sealing plate 8: ensures the sealing of the exhalation plug hole 7 to prevent the outside air from entering.
[0116] Breathing structure 9: through the inflation and deflation of the breathing airbag 92, the inflow and outflow of air are controlled to maintain the air flow during the drying process.
[0117] Detailed structure of suction sealing door 6
[0118] Sealing door panel 61: ensures sealing performance.
[0119] Connecting seat 62: supports the air inlet pipe 63.
[0120] Inlet pipe 63: allows air to enter the drying cabinet 1.
[0121] Moisture filter housing 64 and filter filling 65: filter moisture entering the air to prevent moisture from affecting the drying effect.
[0122] Protection net 66: protects the filter filling 65 to prevent foreign matter from entering.
[0123] Detailed composition of breathing structure 9
[0124] Connection frame 91: fixes the breathing airbag 92.
[0125] Breathing airbag 92: realizes the in and out circulation of air.
[0126] Reinforcement frame 93 : provides support for the breathing airbag 92 .
[0127] Support plate 94 and breathing push rod 95: achieve the inflation and deflation of the airbag through mechanical movement.
[0128] Summarize
[0129] This embodiment describes in detail the production process of fluorescent whitening agent for PVC plastic and the working principle and structure of its key equipment. Through scientific and reasonable steps and advanced equipment design, the high purity, high efficiency and stability of fluorescent whitening agent are guaranteed. These methods and equipment provide reliable technical support for industrial production.
[0130] Utilizing the technical solution described in the present invention, or those skilled in the art designing a similar technical solution inspired by the technical solution of the present invention to achieve the above-mentioned technical effects, all fall within the protection scope of the present invention.
Claims
1. A processing equipment and process for a fluorescent brightener for PVC plastic, characterized in that: The processing technology of the fluorescent whitening agent for PVC plastic specifically comprises: first, preparing and selecting raw materials; after the raw materials are prepared, they need to be subjected to a chemical synthesis reaction; after the processing is completed, the reaction products are neutralized and separated from the precipitate; then solid-liquid separation and filtration treatment are performed; then multiple washing and purification are performed; then dehydration and drying are performed; then crushing and fine grinding treatment are performed; then screening and particle size control are performed; finally, the finished products are sealed and packaged and labeled; the processing equipment comprises a drying cabinet (1), a raw material placement plate (2), a push-pull structure (3), a lower heating structure (4), an upper heating structure (5), an air intake sealing door (6), an exhalation plug hole (7), a sealing plate (8), a breathing structure (9), wherein: the raw material placement plate (2) is slidably installed inside the drying cabinet (1) through slide rails on both sides, and the push-pull structure (3) is fixedly installed at the front end of each group of raw material placement plates (2), and the lower heating structure (4) is fixedly installed at the bottom of the drying cabinet (1); the upper heating structure (5) is fixedly installed on the top of the drying cabinet (1), and the air intake sealing door (6) is hingedly installed on the front side of the drying cabinet (1), and the exhalation plug hole (7) is opened on both sides of the drying cabinet (1); the sealing plate (8) is hingedly installed on both sides of the drying cabinet (1) and covers the surface of the exhalation plug hole (7); the breathing structure (9) is fixedly installed on the back of the drying cabinet (1); The air intake sealing door (6) comprises a sealing door plate (61), a connecting seat (62), an air intake pipe (63), a moisture filter housing (64), a filter filling (65) and a protective net (66), and the sealing door plate (61) is mounted on the front side of the drying cabinet (1) through a hinge, and the connecting seat (62) is fixedly mounted inside the sealing door plate (61); the air intake pipe (63) is fixedly mounted inside the connecting seat (62), and the moisture filter housing (64) is fixedly mounted on the outer end of the air intake pipe (63), and the filter filling (65) is filled inside the moisture filter housing (64); the protective net (66) is fixedly mounted on the top of the moisture filter housing (64); The breathing structure (9) comprises a connecting frame (91), a breathing airbag (92), a reinforcing frame (93), a supporting plate (94) and a breathing push rod (95), wherein the connecting frame (91) is fixedly mounted on the back of the drying cabinet (1), and the breathing airbag (92) is fixedly mounted on the surface of the connecting frame (91); the reinforcing frame (93) is fixedly mounted inside the breathing airbag (92), and the supporting plate (94) is fixedly mounted at the rear end of the breathing airbag (92), and the breathing push rod (95) is fixedly mounted between the supporting plate (94) and the drying cabinet (1); The air intake sealing door (6) is a group of metal doors, and a sealing strip is arranged on the inner wall of the air intake sealing door (6); the connecting seats (62) are a plurality of connecting seats, which are arranged vertically and horizontally inside the sealing door plate (61); the air intake pipe (63) is a plurality of connecting seats, which are respectively arranged inside each group of connecting seats (62), and penetrate the sealing door plate (61) and the connecting seats (62); a group of one-way valves are arranged inside the air intake pipe (63); the moisture filter housing (64) is a plastic housing, and the filter filling (65) inside the moisture filter housing (64) is a moisture-proof filter material, and the protective net (66) is a circular metal net; The sealing plate (8) is made of a plurality of rectangular metal plates, and the number of the sealing plates (8) is consistent with the number of the exhalation plug holes (7). The sealing plate (8) sags due to gravity and completely covers the surface of the exhalation plug hole (7); a layer of silicone sheet is bonded to the inner wall of the sealing plate (8); the sealing plate (8) can only be turned outward and cannot be rotated inward; The breathing structure (9) is an air bag as a whole, and the breathing air bag (92) drives the support plate (94) to bulge or deflate through the breathing push rod (95); when the breathing air bag (92) deflates, the gas inside the drying cabinet (1) is squeezed out from the exhalation plug hole (7), forming an exhalation state; when the breathing air bag (92) bulges, the external gas is sucked into the drying cabinet (1) from the air suction sealing door (6), forming an inhalation state; the breathing air bag (92) "breathes" by continuously bulging and deflation.
2. The processing technology of fluorescent whitening agent for PVC plastics as claimed in claim 1, characterized in that: The raw material preparation and selection selects and prepares high-purity starting materials, such as benzaldehyde, aniline, p-chloroaniline, etc., to ensure the stable quality of the raw materials required for the reaction.
3. The processing technology of fluorescent whitening agent for PVC plastics as claimed in claim 1, characterized in that: In the chemical synthesis reaction process, a specific chemical reaction, such as condensation reaction, chlorination reaction, coupling reaction, etc., is carried out in a reaction vessel to form the core structure of the fluorescent whitening agent.
4. The processing technology of fluorescent whitening agent for PVC plastics as claimed in claim 1, characterized in that: The reaction product is neutralized and separated by precipitation. The mixture after the reaction is neutralized to precipitate the generated fluorescent whitening agent from the solution and separate out a solid product.
5. The processing technology of fluorescent whitening agent for PVC plastics as claimed in claim 1, characterized in that: The solid-liquid separation and filtration treatment separates the precipitate from the liquid through a filtration device, removes impurities and unreacted raw materials in the solution, and obtains a preliminarily purified fluorescent whitening agent.
6. The processing technology of fluorescent whitening agent for PVC plastics as claimed in claim 1, characterized in that: The multiple washing purification is to use a suitable solvent, such as water or alcohol, to wash the filtered precipitate multiple times to remove residual reaction by-products and solvents and improve the purity of the product.
7. The processing technology of fluorescent whitening agent for PVC plastics as claimed in claim 1, characterized in that: The dehydration and drying is to dehydrate and dry the washed wet product through a drying device to remove water or solvent to obtain dry fluorescent whitening agent powder.
8. The processing technology of fluorescent whitening agent for PVC plastics as claimed in claim 1, characterized in that: The crushing and fine grinding treatment is to crush and grind the dried fluorescent whitening agent so that its particle size reaches the required fineness, thereby ensuring the uniformity and application effect of the product.
9. The processing technology of fluorescent whitening agent for PVC plastics as claimed in claim 1, characterized in that: The screening and particle size control is to screen the crushed fluorescent whitening agent through a screening device to remove unqualified particles and ensure the consistency and stability of the product particle size.
10. The processing technology of fluorescent whitening agent for PVC plastics according to claim 1, characterized in that: The sealed packaging and labeling are used to seal qualified fluorescent whitening agent products to prevent moisture and pollution, and product information such as batch number, production date, specifications, etc. are indicated on the packaging.