Recycling device for fluorine-containing solvent used in film coating industry

Abstract

The utility model belongs to the field of fluorine-containing solvent recovery, and particularly relates to a fluorine-containing solvent recovery device for the coating industry, which comprises an operation room, a gas concentration device connected with the operation room, a condensing device connected with the gas concentration device and a collecting device connected with the condensing device. According to the fluorine-containing solvent recovery device for the film coating industry, the fluorine-containing solvent for the film coating industry can be recovered and recycled, so that the recycling rate of resources can be increased, the influence of the resources on the environment is greatly reduced, and sustainable development is further promoted.

Description

Technical Field

[0001] This utility model belongs to the field of fluorinated solvent recovery, specifically relating to a device for recovering fluorinated solvents used in the coating industry. Background Technology

[0002] In industry, fluorinated lubricants, fluorinated greases, and fluorinated polysiloxane oils, among other fluoropolymers, are often coated onto material surfaces to impart excellent properties such as low surface tension, good lubrication, fingerprint resistance, and hydrophobicity and oleophobicity. They can be used as coatings in industrial equipment typically coated with fluorinated lubricants, CD and DVD tray parts in personal computers and audio equipment, and consumer and office machines such as printers, copiers, and throughput machines. They can also be used in syringe needles and syringes, medical tubing parts, metal blades, and tubing, where polysiloxane lubricants are commonly used. Rust inhibitors are used to cover metal surfaces that are easily oxidized and rusted by oxygen in the air, preventing rust by isolating the metal surface from oxygen. Moisture-proof and anti-fouling coatings are used only to impart moisture and stain resistance to plastics, rubber, metals, glass, and mounting circuit boards.

[0003] In the fluoropolymer coating industry, fluorinated compounds or mixtures of fluorinated compounds with other solvents are often used as solvents for fluoropolymers. Organic fluorinated solvents have a wide range of commercial applications, serving as cleaning agents, solvents, foaming agents, refrigerants, leak test fluids, dry etchants, developers, and heat transfer media. Considering ozone depletion potential (ODP) and global warming potential (GWP), organic fluorinated solvents have undergone three iterations of development: chlorofluorocarbons (CFCs); hydrofluorocarbons (HCFCs) and perfluorocarbons (PFCs); and hydrofluoroethers (HFEs).

[0004] In the coating industry, where fluorinated solvents are used, these solvents evaporate into the air as gases. Therefore, a large amount of fluorinated solvents are wasted during coating operations and contribute to environmental pollution. Utility Model Content

[0005] The purpose of this invention is to provide a device for recovering fluorinated solvents used in the coating industry.

[0006] To achieve the above objectives, this utility model adopts the following technical solution:

[0007] A fluorinated solvent recovery device for the coating industry includes an operating room, a gas concentration device connected to the operating room, a condensation device connected to the gas concentration device, and a collection device connected to the condensation device.

[0008] The gas concentration device includes a cyclone adsorption device and a fluorinated solvent desorption device; the cyclone adsorption device includes a gas inlet, a gas outlet, and an activated carbon outlet; the gas inlet is connected to the outlet of the operating room; the activated carbon outlet is connected to the fluorinated solvent desorption device; and the outlet of the fluorinated solvent desorption device is connected to a condensation device.

[0009] The cyclone adsorption device can be two devices connected in parallel or in series.

[0010] The gas concentration device is a gas separation membrane module; the gas separation membrane module includes a membrane shell and membrane fibers disposed within the membrane shell; the membrane fibers are polyimide membrane fibers; the membrane shell is provided with a raw gas inlet, a gas production outlet, and a waste gas outlet; the raw gas inlet is connected to the operating room; the gas production outlet is connected to a condensation device.

[0011] The gas separation membrane assembly consists of two components connected in parallel or in series.

[0012] The collection device is connected to the distillation device.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The fluorinated solvent recovery device for the coating industry of this invention can recover and recycle fluorinated solvents used in the coating industry, which can not only improve the resource recycling rate, but also greatly reduce its environmental impact, thereby promoting sustainable development. Attached Figure Description

[0015] Figure 1-2 This is a schematic diagram of the overall structure of a fluorinated solvent recovery device used in the coating industry according to different embodiments of this utility model. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0017] Figure 1-2 This invention illustrates a device for recovering fluorinated solvents used in the coating industry, comprising an operating room 1, a gas concentration device connected to the operating room, a condensation device 4 connected to the gas concentration device, and a collection device 5 connected to the condensation device. In the coating industry, organic fluorinated solvents and air exist in the form of a mixed gas. The operating room is preferably a semi-enclosed space, and negative pressure collection is used to collect the mixture of organic fluorinated solvents and air into the gas concentration device.

[0018] As one form of implementation Figure 1The diagram shows that the gas concentration device includes a cyclone adsorption device 2 and a fluorinated solvent desorption device 3. The cyclone adsorption device includes a gas inlet, a gas outlet, and an activated carbon outlet. The gas inlet is connected to the outlet of the operating room. The activated carbon outlet is connected to the fluorinated solvent desorption device. The outlet of the fluorinated solvent desorption device is connected to a condenser. Its operating principle is as follows: the organic fluorinated solvent and air, as a mixed gas, enter the cyclone adsorption device through the gas inlet. The fluorinated solvent is adsorbed by the activated carbon and discharged from the activated carbon outlet, entering the fluorinated solvent desorption device 3. The separated gas is discharged from the gas outlet. The fluorinated solvent and activated carbon are then heated and separated in the fluorinated solvent desorption device. The separated fluorinated solvent enters the condenser 4 for condensation and separation.

[0019] As a preferred embodiment, the cyclone adsorption device is two devices connected in parallel or in series. Two devices connected in parallel facilitate the replacement of the cyclone adsorption devices, while two devices connected in series facilitate secondary enrichment.

[0020] As another form of implementation, such as Figure 2 The gas concentration device is shown to be a gas separation membrane module 6. The gas separation membrane module includes a membrane shell and membrane fibers disposed within the membrane shell. The membrane fibers are polyimide membrane fibers. The membrane shell is provided with a raw gas inlet, a gas production outlet, and a waste gas outlet. The raw gas inlet is connected to the operating room. The gas production outlet is connected to a condensing device. The implementation principle is as follows: an organic fluorinated solvent and air enter the gas separation membrane module 6 as a mixed gas through the raw gas inlet. The fluorinated solvent and air are separated by passing through the membrane fibers. The separated fluorinated solvent enters the condensing device 4 for condensation and separation, and the separated air is discharged from the waste gas outlet. Two gas separation membrane modules can be connected in parallel or in series.

[0021] After being condensed by condenser 4, the fluorinated solvent enters the collection device 5. Since the fluorinated solvent has different components, the condensation temperature is adjusted, and different cooling media are selected to condense the organic fluorinated mixed gas. The different condensation points of the organic fluorinated solvents are utilized to rapidly cool the fluorinated solvent with the cooling media.

[0022] The fluorinated solvents in the collection device are analyzed, and further separation is performed based on the analysis results. Commonly used methods for analyzing the components of fluorinated solvents are gas chromatography (GC), infrared spectroscopy (IR), and nuclear magnetic resonance (NMR).

[0023] Further separation methods can include washing, drying, filtering, distillation, etc. For example, when distillation is required, the collection device is connected to the distillation device.

[0024] In summary, the fluorinated solvent recovery device for the coating industry of this utility model can recover and recycle fluorinated solvents used in the coating industry, which can not only improve the resource recycling rate, but also greatly reduce its environmental impact, thereby promoting sustainable development.

[0025] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A device for recovering fluorinated solvents used in the coating industry, characterized in that, It includes an operating room, a gas concentrator connected to the operating room, a condenser connected to the gas concentrator, and a collection device connected to the condenser; The gas concentration device includes a cyclone adsorption device and a fluorinated solvent desorption device; the cyclone adsorption device includes a gas inlet, a gas outlet, and an activated carbon outlet; the gas inlet is connected to the outlet of the operating room; the activated carbon outlet is connected to the fluorinated solvent desorption device; and the outlet of the fluorinated solvent desorption device is connected to a condensation device.

2. The fluorinated solvent recovery device for the coating industry according to claim 1, characterized in that, The cyclone adsorption device can be two devices connected in parallel or in series.

3. The fluorinated solvent recovery device for the coating industry according to claim 1, characterized in that, The gas concentration device is a gas separation membrane module; the gas separation membrane module includes a membrane shell and membrane fibers disposed within the membrane shell; the membrane fibers are polyimide membrane fibers; the membrane shell is provided with a raw gas inlet, a gas production outlet, and a waste gas outlet; the raw gas inlet is connected to the operating room; the gas production outlet is connected to a condensation device.

4. The fluorinated solvent recovery device for the coating industry according to claim 3, characterized in that, The gas separation membrane assembly consists of two components connected in parallel or in series.

5. The fluorinated solvent recovery device for the coating industry according to claim 1, characterized in that, The collection device is connected to the distillation device.

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