Sodium methoxide wastewater purification system

Abstract

The utility model relates to an industrial wastewater treatment technology, and discloses a sodium methoxide wastewater purification system which comprises a sodium methoxide wastewater temporary storage tank, a filter, an adsorption purifier, a film evaporator and a three-stage separation system, the sodium methoxide wastewater temporary storage tank is connected with the filter, the filter is connected with the adsorption purifier, the adsorption purifier is connected with a solvent adjusting tank, and the film evaporator is connected with the solvent adjusting tank. The solvent adjusting tank is connected with the film evaporator; the film evaporator is connected with the three-stage separation system; the film evaporator comprises a vacuum film evaporator and a rotary scraper type film evaporator, the rotary scraper type film evaporator is connected with a condenser, the condenser is connected with a condensate recovery tank, and the condensate recovery tank is connected with a circulating material pipe; a horizontal spiral discharging centrifugal machine of the three-stage separation system is connected with a rotary scraper type film evaporator, the horizontal spiral discharging centrifugal machine is connected with a pressurizing leaf filter, the pressurizing leaf filter is connected with a vacuum belt filter, the vacuum belt filter is connected with a vacuum microwave dryer, and the vacuum microwave dryer is connected with a cooling tank.

Description

Technical Field

[0001] This utility model relates to the field of industrial wastewater treatment technology, and more specifically, to a sodium methoxide wastewater purification system. Background Technology

[0002] Sodium methoxide is an important chemical raw material widely used in organic processing, synthetic pharmaceuticals, and pesticides. During its production, a large amount of wastewater containing sodium methoxide is generated. This wastewater not only contains high concentrations of sodium methoxide but may also contain other organic impurities and inorganic salts; direct discharge would cause serious environmental pollution. Currently, the treatment of sodium methoxide wastewater mainly focuses on harmless treatment, while the recovery and utilization efficiency of sodium methoxide is low. Existing technologies for sodium methoxide recovery mostly employ evaporation crystallization, but this method is energy-intensive, inefficient, and easily affected by impurities, making it difficult to obtain high-purity sodium methoxide products. Therefore, developing a highly efficient, low-energy-consumption system capable of purifying sodium methoxide from wastewater has significant economic and environmental implications. Utility Model Content

[0003] This application provides a sodium methoxide wastewater purification system, which solves the problem that the existing technology for recovering sodium methoxide mostly adopts the evaporation crystallization method, but this method has high energy consumption, low efficiency, and is easily affected by impurities, making it difficult to obtain high-purity sodium methoxide products.

[0004] This application provides a sodium methoxide wastewater purification system, including a sodium methoxide wastewater storage tank, a filter, an adsorption purifier, a thin film evaporator, and a three-stage separation system. The sodium methoxide wastewater storage tank is connected to the filter via a pipeline, the filter is connected to the adsorption purifier via a pipeline, the adsorption purifier is connected to a solvent regulating tank, the outlet of the solvent regulating tank is connected to the thin film evaporator, and the outlet of the thin film evaporator is connected to the three-stage separation system via a pipeline.

[0005] The thin film evaporator includes a vacuum thin film evaporator and a rotary scraper thin film evaporator. A condenser is connected to the rotary scraper thin film evaporator via a pipe. The outlet of the condenser is connected to a condensate recovery tank via a pipe. The condensate recovery tank is connected to a circulating material pipe via a pipe.

[0006] The three-stage separation system includes a horizontal screw discharge centrifuge, a pressure leaf filter, and a vacuum belt filter;

[0007] The discharge port of the rotary scraper thin film evaporator is connected to the horizontal screw discharge centrifuge via a pipe. The horizontal screw discharge centrifuge is connected to the pressurized leaf filter. The pressurized leaf filter is connected to the vacuum belt filter. The discharge port of the vacuum belt filter is connected to a vacuum microwave dryer via a pipe. The discharge port of the vacuum microwave dryer is connected to a cooling tank.

[0008] Preferably, the filter includes a grid, a precision filter, and a polymer ultrafiltration membrane. The sodium methoxide wastewater temporary storage tank is connected to the grid. The outlet of the grid is connected to the precision filter via a pipe. The outlet of the precision filter is connected to the polymer ultrafiltration membrane via a pipe. The outlet of the polymer ultrafiltration membrane is connected to the adsorption purifier via a pipe.

[0009] Preferably, the adsorption purifier includes an activated carbon column and an ion exchange resin column.

[0010] Preferably, the grid, the precision filter, and the polymer ultrafiltration membrane are connected to the waste residue recovery pipe via pipelines.

[0011] Preferably, the bottom of the horizontal screw discharge centrifuge, the pressure leaf filter and the vacuum belt filter are all connected to a waste discharge pipe, and the waste discharge pipe is connected to the circulating material pipe.

[0012] Preferably, the circulating feed pipe is connected to the rotary scraper thin film evaporator via a pipe.

[0013] Preferably, pressure sensors and temperature sensors are installed on the vacuum thin-film evaporator, the rotary scraper thin-film evaporator, the vacuum microwave dryer, and the cooling tank.

[0014] Preferably, pressure sensors are installed on the horizontal screw discharge centrifuge, the pressurized leaf filter, and the vacuum belt filter.

[0015] As can be seen from the above technical solution, this application provides a sodium methoxide wastewater purification system. In use, the sodium methoxide wastewater in the temporary storage tank is filtered through a multi-stage series filter to remove suspended particles and high molecular weight impurities. Then, it enters an activated carbon column and an ion exchange resin column to remove pigments and residual acids. After purification and adsorption, the material enters a thin-film evaporator for crystallization and then enters a three-stage separation system through a pipeline. A horizontal screw discharge centrifuge removes 80% of the mother liquor, a pressure leaf filter retains fine particle crystals, and a vacuum belt filter achieves continuous low moisture content discharge. The material separated by the three-stage separation system enters a vacuum microwave dryer for rapid drying to prevent crystallization from absorbing moisture and clumping. The solution condensed from the condenser and the solutions from the thin-film evaporator and the three-stage separation system are circulated back into the thin-film evaporator through a circulating material pipe to continue crystallization, avoiding material waste.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model achieves efficient recycling of sodium methoxide, reduces production costs, and reduces wastewater discharge, thus meeting environmental protection requirements.

[0018] 2. This utility model adopts a combination of vacuum thin film evaporator and rotary scraper thin film evaporator, which significantly reduces energy consumption compared with the traditional evaporation crystallization method.

[0019] 3. This utility model can obtain high-purity sodium methoxide products with a purity of over 99% through multi-stage separation and purification processes.

[0020] In summary, a sodium methoxide wastewater purification system achieves efficient recovery and utilization of sodium methoxide, reduces production costs, and minimizes wastewater discharge, meeting environmental protection requirements. By combining a vacuum thin-film evaporator and a rotary scraper thin-film evaporator, it significantly reduces energy consumption compared to traditional evaporation and crystallization methods. Through multi-stage separation and purification processes, high-purity sodium methoxide products can be obtained. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0022] Figure 1 A schematic diagram of a sodium methoxide wastewater purification system provided by this utility model;

[0023] Figure 2 This is a schematic diagram of a filter for a sodium methoxide wastewater purification system provided by this utility model;

[0024] Figure 3 This is a schematic diagram of a three-stage separation system for purifying sodium methoxide wastewater provided by this utility model.

[0025] The reference numerals in the detailed embodiments are as follows:

[0026] 1. Sodium methoxide wastewater temporary storage tank; 2. Filter; 201. Grille; 202. Precision filter; 203. Polymer ultrafiltration membrane; 3. Activated carbon column; 4. Ion exchange resin column; 5. Solvent conditioning tank; 6. Vacuum thin film evaporator; 7. Rotary scraper thin film evaporator; 8. Condenser; 9. Three-stage separation system; 901. Horizontal screw discharge centrifuge; 902. Pressurized leaf filter; 903. Vacuum belt filter; 10. Condensate recovery tank; 11. Cooling tank; 12. Vacuum microwave dryer; 13. Temperature sensor; 14. Pressure sensor; 15. Circulating feed pipe; 16. Waste discharge pipe; 17. Waste residue recovery pipe. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0028] See Figure 1-3 This application discloses a sodium methoxide wastewater purification system. To address the problems of high energy consumption, low efficiency, and susceptibility to impurities in existing sodium methoxide recovery methods, which often employ evaporation crystallization, resulting in the inability to obtain high-purity sodium methoxide products, this application proposes a sodium methoxide wastewater purification system. This system achieves efficient recovery and utilization of sodium methoxide, reduces production costs, and minimizes wastewater discharge, meeting environmental protection requirements. It utilizes a combination of vacuum thin-film evaporators and rotary scraper thin-film evaporators, significantly reducing energy consumption compared to traditional evaporation crystallization methods. Through multi-stage separation and purification processes, high-purity sodium methoxide products can be obtained.

[0029] Specifically, a sodium methoxide wastewater purification system includes a sodium methoxide wastewater storage tank 1, a filter 2, an adsorption purifier, a thin-film evaporator, and a three-stage separation system 9. The sodium methoxide wastewater storage tank 1 is connected to the filter 2 via a pipeline, and the filter 2 is connected to the adsorption purifier via a pipeline. The filter 2 includes a bar screen 201, a precision filter 202, and a polymer ultrafiltration membrane 203. The sodium methoxide wastewater storage tank 1 is connected to the bar screen 201, and the outlet of the bar screen 201 is connected to the precision filter 202 via a pipeline. The outlet of the precision filter 202 is connected to... The pipeline connects to the polymer ultrafiltration membrane 203. The grid 201, precision filter 202, and polymer ultrafiltration membrane 203 are connected to the waste residue recovery pipe 17 via pipelines. The sodium methoxide wastewater in the temporary storage tank 1 is passed through a multi-stage series filter 2 to remove suspended particles and polymeric impurities. The outlet of the polymer ultrafiltration membrane 203 is connected to an adsorption purifier via a pipeline. The adsorption purifier includes an activated carbon column 3 and an ion exchange resin column 4. The filtered material then enters the activated carbon column 3 and the ion exchange resin column 4 to remove pigments and residues. The acid adsorption purifier is connected to a solvent conditioning tank 5. Methanol or ethanol is added to adjust the polarity of the waste liquid and enhance the subsequent crystallization efficiency. The outlet of the solvent conditioning tank 5 is connected to a thin-film evaporator, and the outlet of the thin-film evaporator is connected to a three-stage separation system 9 via a pipeline. The thin-film evaporator includes a vacuum thin-film evaporator 6 and a rotary scraper thin-film evaporator 7. The combination of the vacuum thin-film evaporator 6 and the rotary scraper thin-film evaporator 7 significantly reduces energy consumption compared to the traditional evaporation crystallization method. The rotary scraper thin-film evaporator 7 is connected to a cooling system via a pipeline. The condenser 8 has a condensate recovery tank 10 connected to its outlet via a pipe. The condensate recovery tank 10 is connected to a circulating feed pipe 15 via a pipe. The evaporated gas enters the condenser 8 and is condensed. The liquid then enters the condensate recovery tank 10 for collection. Once a certain volume is collected, the liquid can enter the thin-film evaporator through the circulating feed pipe 15 to continue the reaction. The rotating scraper-type thin-film evaporator 7 is connected to the circulating feed pipe 15 via a pipe. The three-stage separation system 9 includes a horizontal screw discharge centrifuge 901, a pressure leaf filter 902, and a vacuum belt filter 903.The discharge port of the rotary scraper-type thin-film evaporator 7 is connected to a horizontal screw discharge centrifuge 901 via a pipeline. The horizontal screw discharge centrifuge 901 is connected to a pressure leaf filter 902, which is connected to a vacuum belt filter 903. After purification and adsorption, the material enters the thin-film evaporator for crystallization and then enters the three-stage separation system 9 via a pipeline. The horizontal screw discharge centrifuge 901 removes 80% of the mother liquor, the pressure leaf filter 902 retains fine particle crystals, and the vacuum belt filter 903 achieves continuous low-moisture discharge. The bottoms of the horizontal screw discharge centrifuge 901, pressure leaf filter 902, and vacuum belt filter 903 are all connected to waste discharge pipes 16, which are connected to a circulating material pipe 15. Incompletely separated material re-enters the thin-film evaporator through the circulating material pipe to continue crystallizing, avoiding material waste. The vacuum belt filter 903... The outlet of unit 3 is connected to a vacuum microwave dryer 12 via a pipeline. The material separated by the three-stage separation system 9 enters the vacuum microwave dryer 12 for rapid drying, preventing crystallization, moisture absorption, and clumping. The outlet of the vacuum microwave dryer 12 is connected to a cooling tank 11. The product enters the cooling tank 11 for cooling before proceeding to the next process. Pressure sensors 14 and temperature sensors 13 are installed on the vacuum thin-film evaporator 6, the rotary scraper thin-film evaporator 7, the vacuum microwave dryer 12, and the cooling tank 11. Pressure sensors 14 are also installed on the horizontal screw discharge centrifuge 901, the pressure leaf filter 902, and the vacuum belt filter 903. This multi-stage separation and purification process can obtain high-purity sodium methoxide, with a purity of over 99%, achieving efficient recovery and utilization of sodium methoxide, reducing production costs, and minimizing wastewater discharge, thus meeting environmental protection requirements.

[0030] As can be seen from the above technical solution, when using a sodium methoxide wastewater purification system, the sodium methoxide wastewater in the temporary storage tank 1 is passed through a multi-stage series filter 2 to remove suspended particles and high molecular weight impurities. Then, it enters the activated carbon column 3 and the ion exchange resin column 4 to remove pigments and residual acids. After purification and adsorption, the material enters the thin film evaporator for crystallization and then enters the three-stage separation system 9 through a pipeline. The horizontal screw discharge centrifuge 901 removes 80% of the mother liquor, the pressure leaf filter 902 intercepts fine particle crystals, and the vacuum belt filter 903 achieves continuous low moisture content discharge. The material separated by the three-stage separation system 9 enters the vacuum microwave dryer 12 for rapid drying to avoid moisture absorption and clumping of the crystals. The solution condensed by the condenser 8 and the solutions from the thin film evaporator and the three-stage separation system 9 are circulated back into the thin film evaporator through the circulating material pipe 15 to continue crystallization, avoiding material waste.

[0031] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the applications disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and incorporate common knowledge or customary techniques in the art disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of the invention is indicated by the claims.

[0032] It should be understood that this utility model is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model.

Claims

1. A sodium methoxide wastewater purification system, characterized in that: The system includes a sodium methoxide wastewater storage tank (1), a filter (2), an adsorption purifier, a thin film evaporator, and a three-stage separation system (9). The sodium methoxide wastewater storage tank (1) is connected to the filter (2) via a pipe. The filter (2) is connected to the adsorption purifier via a pipe. The adsorption purifier is connected to a solvent regulating tank (5). The outlet of the solvent regulating tank (5) is connected to the thin film evaporator. The outlet of the thin film evaporator is connected to the three-stage separation system (9) via a pipe. The thin film evaporator includes a vacuum thin film evaporator (6) and a rotary scraper thin film evaporator (7). A condenser (8) is connected to the rotary scraper thin film evaporator (7) via a pipe. A condensate recovery tank (10) is connected to the outlet of the condenser (8) via a pipe. A circulating material pipe (15) is connected to the condensate recovery tank (10) via a pipe. The three-stage separation system (9) includes a horizontal screw discharge centrifuge (901), a pressurized leaf filter (902), and a vacuum belt filter (903). The outlet of the rotary scraper thin film evaporator (7) is connected to the horizontal screw discharge centrifuge (901) via a pipe. The horizontal screw discharge centrifuge (901) is connected to the pressurized leaf filter (902). The pressurized leaf filter (902) is connected to the vacuum belt filter (903). The outlet of the vacuum belt filter (903) is connected to the vacuum microwave dryer (12) via a pipe. The outlet of the vacuum microwave dryer (12) is connected to the cooling tank (11).

2. The sodium methoxide wastewater purification system according to claim 1, characterized in that: The filter (2) includes a bar screen (201), a precision filter (202), and a polymer ultrafiltration membrane (203). The sodium methoxide wastewater storage tank (1) is connected to the bar screen (201). The outlet of the bar screen (201) is connected to the precision filter (202) through a pipe. The outlet of the precision filter (202) is connected to the polymer ultrafiltration membrane (203) through a pipe. The outlet of the polymer ultrafiltration membrane (203) is connected to the adsorption purifier through a pipe.

3. The sodium methoxide wastewater purification system according to claim 2, characterized in that: The adsorption purifier includes an activated carbon column (3) and an ion exchange resin column (4).

4. The sodium methoxide wastewater purification system according to claim 2, characterized in that: The grid (201), the precision filter (202), and the polymer ultrafiltration membrane (203) are connected to the waste residue recovery pipe (17) via pipelines.

5. The sodium methoxide wastewater purification system according to claim 1, characterized in that: The bottom of the horizontal screw discharge centrifuge (901), the pressurized leaf filter (902) and the vacuum belt filter (903) are all connected to a waste discharge pipe (16), and the waste discharge pipe is connected to the circulating material pipe (15).

6. The sodium methoxide wastewater purification system according to claim 1, characterized in that: The rotating scraper-type thin film evaporator (7) is connected to the circulating material pipe (15) via a pipe.

7. The sodium methoxide wastewater purification system according to claim 1, characterized in that: Pressure sensors (14) and temperature sensors (13) are installed on the vacuum thin film evaporator (6), the rotary scraper thin film evaporator (7), the vacuum microwave dryer (12), and the cooling tank (11).

8. The sodium methoxide wastewater purification system according to claim 1, characterized in that: Pressure sensors (14) are installed on the horizontal screw discharge centrifuge (901), the pressurized leaf filter (902), and the vacuum belt filter (903).

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