A multi-layer parallel organic waste liquid micro-treatment and recovery device

Abstract

This invention provides a multi-layer parallel organic waste liquid micro-treatment and recovery device, belonging to the field of waste liquid micro-treatment and recovery. It includes a waste liquid distribution channel, an extractant distribution channel, a waste liquid micro-treatment unit, a raffinate collection channel, and an extractant collection channel. The waste liquid micro-treatment unit is composed of a cross-shaped waste liquid emulsification unit, a serpentine enhanced mixing unit, and a Y-shaped separation and extraction unit connected in series. One side of the cross-shaped waste liquid emulsification unit is the waste liquid inlet channel, and both ends are the extractant inlet channels. This invention solves the problems of low efficiency and high energy consumption in existing organic waste liquid treatment methods, achieving efficient removal and separation of acetic acid from industrial waste liquid. It optimizes the adsorption and separation efficiency during the waste liquid treatment process, ensuring that the treated waste liquid meets environmental emission standards. Simultaneously, it improves the automation level and ease of operation of waste liquid treatment, reducing manual intervention and operating costs.

Description

Technical Field

[0001] This invention relates to the field of micro-treatment and recycling of waste liquid, and more particularly to a multi-layer parallel organic waste liquid micro-treatment and recycling device. Background Technology

[0002] Acetic acid and aniline are important organic chemical raw materials, widely used in the chemical, pharmaceutical, and dye industries. Recovering organic components from organic wastewater is crucial for the production processes, economic performance, resource utilization, and environmental indicators of various industries, and has always been a focus of attention. Wastewater extraction treatment is a type of physicochemical wastewater treatment method that uses extractants to purify wastewater through extraction. However, traditional wastewater treatment devices suffer from low treatment efficiency, large extractant consumption, and are prone to secondary pollution due to the introduction of catalysts during the process. Therefore, there is an urgent need to develop organic wastewater treatment devices with high treatment efficiency, low extractant consumption, and good environmental performance.

[0003] Currently, microchannel technology is the most promising technology in high-efficiency liquid-liquid extraction processes. Based on the microscale enhancement effect, microchannel technology can significantly improve extraction efficiency while saving extractant, and it has been widely used in chemical, biomedical, and other fields. However, mainstream microchannel extractors suffer from problems such as small throughput, high flow resistance, and numerous flow dead zones. Furthermore, some current mainstream manufacturing methods, such as soft lithography and microfabrication technologies, create a large number of flow dead zones, resulting in low space utilization and hindering the three-dimensional and modular design of the device. Mainstream microchannel extractors cannot effectively separate the extractant phase from the raffinate phase, and the separation of the post-extraction solution often requires multiple complex steps. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-layer parallel organic waste liquid micro-treatment and recycling device, which solves the problems of low treatment efficiency, high energy consumption, and potential harmful by-products that may have a negative impact on the environment and health in existing organic waste liquid treatment. It achieves efficient removal and separation of acetic acid, an organic compound, from industrial waste liquid; optimizes the adsorption and separation efficiency in the waste liquid treatment process, ensuring that the treated waste liquid meets environmental emission standards, while improving the automation level and ease of operation of waste liquid treatment, and reducing manual intervention and operating costs.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A multi-layer parallel organic waste liquid micro-treatment and recovery device is characterized by comprising a waste liquid distribution channel, an extractant distribution channel, a waste liquid micro-treatment unit, a raffinate collection channel, and an extractant collection channel. The waste liquid micro-treatment unit is composed of a cross-shaped waste liquid emulsification unit, a serpentine enhanced mixing unit, and a Y-shaped separation and extraction unit connected in series. One side of the cross-shaped waste liquid emulsification unit is a waste liquid inlet channel, and both ends of the cross-shaped waste liquid emulsification unit are extractant inlet channels.

[0007] Several waste liquid microprocessing units are stacked between the waste liquid distribution channel, the raffinate collection channel, and the extract phase collection channel. The waste liquid distribution channel is connected to the several waste liquid microprocessing units through a waste liquid inlet channel. The raffinate collection channel and the extract phase collection channel are respectively connected to the several waste liquid microprocessing units through a Y-type separation and extraction unit. The extract liquid distribution channel is connected to the several waste liquid microprocessing units through an extract liquid inlet channel.

[0008] Furthermore, there are two extraction liquid distribution channels, and the two extraction liquid distribution channels are respectively connected to the plurality of waste liquid microprocessing units through the extraction liquid inlet channels at both ends of the cross-shaped waste liquid emulsification unit.

[0009] Furthermore, the upper end of the waste liquid distribution channel is connected to a waste liquid distribution channel inlet pipe, the upper end of the extract liquid distribution channel is connected to an extract liquid distribution channel inlet pipe, the upper and lower ends of the raffinate collection channel are respectively connected to raffinate collection channel outlet pipes, and the upper and lower ends of the extract phase collection channel are respectively connected to extract phase collection channel outlet pipes.

[0010] Furthermore, the Y-shaped separation and extraction unit includes a separation unit inlet tube, an extract phase separation tube, and a raffinate phase separation tube. The extract phase separation tube is connected to the extract phase collection channel, and the raffinate phase separation tube is connected to the raffinate phase collection channel. The extract phase separation tube and the raffinate phase separation tube adopt an asymmetrical design, with the Y-shaped intersection point biased towards the raffinate phase separation tube.

[0011] Furthermore, the waste liquid micro-treatment unit is made of hydrophobic material PDMS.

[0012] Furthermore, the inner wall of the inlet tube of the separation unit is hydrophilically modified with APTES on the side adjacent to the raffinate phase separation tube, and the inner wall of the raffinate phase separation tube is also hydrophilically modified with APTES, so that the waste liquid droplets are deflected into the raffinate phase separation tube.

[0013] Furthermore, the serpentine enhanced mixing unit can extend in the length direction, and the bending direction of the serpentine enhanced mixing unit is on the same horizontal plane as the bifurcation direction of the Y-shaped separation and extraction unit.

[0014] Furthermore, the device is modular in design and can be connected in series with the outlet pipe of the raffinate collection channel and the inlet pipe of the waste liquid distribution channel for secondary extraction.

[0015] Advantages of this invention:

[0016] This device solves the problems of low efficiency and high energy consumption in existing organic wastewater treatment, and effectively reduces the negative impact of potential harmful byproducts on the environment and health. By optimizing the design of the distribution channel and wastewater microprocessor array, it improves droplet production efficiency and flow control, thus making wastewater treatment more efficient. The modular design and scalability of this device give it excellent expandability, enabling it to meet the wastewater treatment needs of different scales and requirements. Advanced material characterization and precise separation technologies are used to achieve accurate separation of wastewater droplets and extract, while also improving the stability and reliability of the device. The environmental friendliness and sustainability of this device make it widely applicable in the field of wastewater treatment, making a positive contribution to promoting environmental protection and sustainable development. Furthermore, the design of this device improves the automation level and ease of operation of wastewater treatment, reducing manual intervention and operating costs. Attached Figure Description

[0017] Figure 1 Schematic diagram of the waste liquid micro-treatment unit structure of the present invention;

[0018] Figure 2 A three-dimensional structural diagram of the device of the present invention;

[0019] Figure 3 Schematic diagram of the Y-type separation and extraction unit structure of the present invention;

[0020] In the diagram: 1. Cross-shaped waste liquid emulsification unit; 2. Snake-shaped enhanced mixing unit; 3. Y-shaped separation and extraction unit; 31. Separation unit inlet pipe; 32. Extraction phase separation pipe; 33. Raffinate phase separation pipe; 4. Waste liquid droplets; 5. Extraction liquid inlet channel; 6. Waste liquid inlet channel; 7. Waste liquid distribution channel inlet connector; 8. Extraction liquid distribution channel inlet connector; 9. Raffinate phase collection channel outlet connector; 10. Extraction phase collection channel outlet connector; 11. Extraction phase collection channel; 12. Raffinate phase collection channel; 13. Waste liquid micro-treatment unit; 14. Extraction liquid distribution channel; 15. Waste liquid distribution channel. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0022] like Figure 1 and Figure 2 As shown, a multi-layer parallel organic waste liquid micro-treatment and recovery device includes a waste liquid distribution channel 15, an extractant distribution channel 14, a waste liquid micro-treatment unit 13, a raffinate collection channel 12, and an extractant collection channel 11. The waste liquid micro-treatment unit 13 is composed of a cross-shaped waste liquid emulsification unit 1, a serpentine enhanced mixing unit 2, and a Y-shaped separation and extraction unit 3 connected in series, integrating emulsification, mixing, and separation functions while simplifying the device and enabling modularization. One side of the cross-shaped waste liquid emulsification unit 1 is a waste liquid inlet channel 6, and both ends of the cross-shaped waste liquid emulsification unit 1 are extractant inlet channels 5.

[0023] A plurality of waste liquid microprocessing units 13 are stacked between the waste liquid distribution channel 15, the raffinate collection channel 12, and the extract phase collection channel 11. The waste liquid distribution channel 15 is connected to the plurality of waste liquid microprocessing units 13 through the waste liquid inlet channel 6. The raffinate collection channel 12 and the extract phase collection channel 11 are respectively connected to the plurality of waste liquid microprocessing units 13 through the Y-type separation and extraction unit 3. The extract liquid distribution channel 14 is connected to the plurality of waste liquid microprocessing units 13 through the extract liquid inlet channel 5.

[0024] In a preferred embodiment of the present invention, there are two extraction liquid distribution channels 14, and the two extraction liquid distribution channels 14 are respectively connected to the plurality of waste liquid microprocessing units 13 through the extraction liquid inlet channels 5 at both ends of the cross-shaped waste liquid emulsification unit 1.

[0025] In a preferred embodiment of the present invention, the upper end of the waste liquid distribution channel 15 is connected to a waste liquid distribution channel inlet pipe 7, the upper end of the extract liquid distribution channel 14 is connected to an extract liquid distribution channel inlet pipe 8, the upper and lower ends of the raffinate collection channel 12 are respectively connected to raffinate collection channel outlet pipes 9, and the upper and lower ends of the extract phase collection channel 11 are respectively connected to extract phase collection channel outlet pipes 10.

[0026] The originally large volume of waste liquid droplets 4 is dispersed into smaller droplets, and then, with the enhanced mixing effect of the serpentine enhanced mixing unit 2, the extraction effect can be significantly enhanced. The multi-layer parallel structure improves the overall integration of the device, optimizes the device layout, and effectively avoids flow dead zones. The device contains several waste liquid micro-processing units 13 connected in parallel. The number of waste liquid micro-processing units 13 can be increased according to actual production needs, thus solving the processing capacity problem of mainstream microchannel waste liquid treatment devices. These multiple parallel waste liquid micro-processing units 13 share a distribution channel, which reduces the number of fluid inlets, simplifies the device structure, reduces space volume, and allows for unified management and distribution of fluids in each layer, ensuring the uniformity of emulsification and dispersion of waste liquid droplets 4 in each waste liquid micro-processing unit 13, and guaranteeing the extraction effect of each layer.

[0027] like Figure 3 As shown, the Y-shaped separation and extraction unit 3 includes a separation unit inlet tube 31, an extract phase separation tube 32, and a raffinate phase separation tube 33. The extract phase separation tube 32 is connected to the extract phase collection channel 11, and the raffinate phase separation tube 33 is connected to the raffinate phase collection channel 12. The extract phase separation tube 32 and the raffinate phase separation tube 33 adopt an asymmetrical design, with the Y-shaped intersection point biased towards the raffinate phase separation tube 33.

[0028] The extracted waste liquid droplets 4 can enter the raffinate phase separation tube 33 more smoothly, thereby optimizing the separation process between the extract phase solution and the raffinate phase droplets, significantly improving the separation efficiency of the extracted waste liquid droplets 4, and thus ensuring the efficient transport and stable separation of the waste liquid droplets 4 during the extraction process. At the same time, this design also reduces the resistance and retention that the waste liquid droplets 4 may encounter when entering the raffinate phase separation tube 33, further improving the overall performance and reliability of the device.

[0029] In a preferred embodiment of the present invention, the waste liquid microprocessor unit 13 is made of hydrophobic material PDMS.

[0030] In a preferred embodiment of the present invention, the inner wall of the separation unit drain pipe 31 on the side of the raffinate phase separation pipe 33 is hydrophilically modified with APTES, and the inner wall of the raffinate phase separation pipe 33 is also hydrophilically modified with APTES, so that the waste liquid droplets 4 are biased to flow into the raffinate phase separation pipe 33.

[0031] The waste liquid droplets 4 can spontaneously approach the inner wall of the raffinate phase separation tube 33 from the inlet pipe 31 of the separation unit, and eventually flow along the flow direction to the raffinate phase separation tube 33, further improving the separation effect.

[0032] In a preferred embodiment of the present invention, the serpentine enhanced mixing unit 2 is capable of extending in the length direction, and the bending direction of the serpentine enhanced mixing unit 2 and the bifurcation direction of the Y-shaped separation and extraction unit 3 are on the same horizontal plane.

[0033] The coplanarity of the serpentine enhanced mixing unit 2 and the Y-shaped separation and extraction unit 3 in their arrangement allows for the stacking of more layers of waste liquid micro-processing units 13 in the longitudinal direction. This greatly increases the wastewater treatment capacity of the device and further enhances the integration of the device, reduces flow dead zones, and promotes modular design of the device.

[0034] In a preferred embodiment of the present invention, the device is modularly designed and can be connected in series with the outlet pipe 9 of the raffinate collection channel and the inlet pipe 7 of the waste liquid distribution channel for secondary extraction. This not only achieves staged extraction and improves extraction efficiency, but also further increases the utilization rate of the extractant and reduces the amount of extractant used through series connection.

[0035] The working principle of this device is as follows:

[0036] like Figure 1 and Figure 3 As shown, waste liquid flows in from waste liquid inlet channel 6 and is sheared into monodisperse waste liquid droplets 4 by the extractant flowing in from the extractant inlet channels 5 on both sides at the cross-shaped waste liquid emulsification unit 1, and is carried downstream. The sheared waste liquid droplets 4 flow in the pipe of the serpentine enhanced mixing unit 2, where the extractant extracts the organic matter in the waste liquid droplets 4. As the flow distance increases, the content of organic matter in the waste liquid droplets 4 gradually decreases until the organic matter is completely extracted.

[0037] When the waste liquid droplets 4 flow to the intersection of the Y-type separation and extraction unit 3, since the entire waste liquid microprocessing unit 13 is made of hydrophobic PDMS material, and the inner wall of the separation unit inlet pipe 31 on the side near the raffinate phase separation tube 33 and the inner wall of the raffinate phase separation tube 33 are both hydrophilically modified with APTES, and the Y-type separation and extraction unit 3 adopts an asymmetrical design with the bifurcation point biased towards the raffinate phase separation tube 33, the waste liquid droplets 4 will spontaneously approach the inner wall of the raffinate phase separation tube 33 in the separation unit inlet pipe 31, and eventually flow towards the raffinate phase separation tube 33 along the flow direction. Meanwhile, the extract phase solution containing high concentrations of organic components will flow more towards the extract phase separation channel 32, thereby achieving automatic separation of the extract phase solution and the raffinate phase droplets, ensuring efficient transport and stable separation of the waste liquid droplets 4 during the extraction process.

[0038] like Figure 2As shown, firstly, waste liquid is introduced into the system through the waste liquid distribution channel inlet connector 7, while the extractant enters the device through the extractant distribution channel inlet connector 8. Then, the waste liquid is precisely distributed to each waste liquid microprocessing unit 13 through the waste liquid distribution channel 15 and the extractant through the extractant distribution channel 14. Within these waste liquid microprocessing units 13, the waste liquid is processed through repeated shearing, emulsifying to form waste liquid droplets 4. The extractant solution is separated and collected through the extractant phase collection channel 11, while the raffinate droplets are guided to the raffinate phase collection channel 12. Finally, the treated waste liquid droplets 4 and the extractant flow out from the outlet connectors at both ends, completing the microprocessing and recycling of organic waste liquid. This device, with its advanced design and efficient operation, significantly improves the efficiency of waste liquid treatment and the accuracy of resource recovery.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art can still adjust the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Therefore, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A multi-layer parallel organic waste liquid micro-treatment and recovery device, characterized in that: It includes a waste liquid distribution channel (15), an extract liquid distribution channel (14), a waste liquid micro-treatment unit (13), a raffinate collection channel (12), and an extract phase collection channel (11). The waste liquid micro-treatment unit (13) is composed of a cross-shaped waste liquid emulsification unit (1), a snake-shaped enhanced mixing unit (2), and a Y-shaped separation and extraction unit (3) connected in series. One side of the cross-shaped waste liquid emulsification unit (1) is a waste liquid inlet channel (6), and both ends of the cross-shaped waste liquid emulsification unit (1) are extract liquid inlet channels (5). A plurality of waste liquid microprocessing units (13) are stacked between the waste liquid distribution channel (15), the raffinate collection channel (12), and the extract phase collection channel (11). The waste liquid distribution channel (15) is connected to the plurality of waste liquid microprocessing units (13) through the waste liquid inlet channel (6). The raffinate collection channel (12) and the extract phase collection channel (11) are respectively connected to the plurality of waste liquid microprocessing units (13) through the Y-type separation and extraction unit (3). The extract liquid distribution channel (14) is connected to the plurality of waste liquid microprocessing units (13) through the extract liquid inlet channel (5). There are two extraction liquid distribution channels (14), and the two extraction liquid distribution channels (14) are respectively connected to the plurality of waste liquid microprocessing units (13) through the extraction liquid inlet channels (5) at both ends of the cross-shaped waste liquid emulsification unit (1). The Y-shaped separation and extraction unit (3) includes a separation unit inlet tube (31), an extract phase separation tube (32), and a raffinate phase separation tube (33). The extract phase separation tube (32) is connected to the extract phase collection channel (11), and the raffinate phase separation tube (33) is connected to the raffinate phase collection channel (12). The extract phase separation tube (32) and the raffinate phase separation tube (33) are designed asymmetrically, with the Y-shaped intersection point biased towards the raffinate phase separation tube (33). The bending direction of the snake-shaped enhanced mixing unit (2) and the bifurcation direction of the Y-shaped separation and extraction unit (3) are on the same horizontal plane.

2. The multi-layer parallel organic waste liquid micro-treatment and recovery device according to claim 1, characterized in that: The upper end of the waste liquid distribution channel (15) is connected to the waste liquid distribution channel inlet pipe (7), the upper end of the extract liquid distribution channel (14) is connected to the extract liquid distribution channel inlet pipe (8), the upper and lower ends of the raffinate collection channel (12) are respectively connected to the raffinate collection channel outlet pipe (9), and the upper and lower ends of the extract phase collection channel (11) are respectively connected to the extract phase collection channel outlet pipe (10).

3. The multi-layer parallel organic waste liquid micro-treatment and recovery device according to claim 2, characterized in that: The waste liquid micro-treatment unit (13) is made of hydrophobic material PDMS.

4. The multi-layer parallel organic waste liquid micro-treatment and recovery device according to claim 3, characterized in that: The inner wall of the separation unit drain tube (31) on the side of the raffinate phase separation tube (33) is hydrophilically modified with APTES. The inner wall of the raffinate phase separation tube (33) is also hydrophilically modified with APTES, so that the waste liquid droplets (4) tend to flow into the raffinate phase separation tube (33).

5. A multi-layer parallel organic waste liquid micro-treatment and recovery device according to claim 4, characterized in that: The snake-shaped reinforced hybrid unit (2) is capable of extending in the length direction.

6. The multi-layer parallel organic waste liquid micro-treatment and recovery device according to claim 5, characterized in that: The device is modularly designed and can be connected in series with the outlet pipe (9) of the raffinate collection channel and the inlet pipe (7) of the waste liquid distribution channel for secondary extraction.

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