Electronic-grade stripping liquid extraction device

Abstract

The utility model relates to the field of waste liquid treatment, in particular to an electronic-grade stripping liquid extraction device. The utility model relates to an electronic-grade stripping liquid extraction device, which comprises a light component removal device, a light component extraction device, a light component extraction device and a light component extraction device, the heavy component removal device is arranged on one side of the light component removal device and is provided with a heavy component removal tower, and the heavy component removal tower is communicated with a tower kettle of the light component removal tower so as to carry out heavy component removal treatment on the stripping liquid in which light components are separated in the tower kettle; and the rectification device is arranged on one side, far away from the light component removal device, of the heavy component removal device, is provided with an ion exchange resin mixed bed, and is used for carrying out rectification treatment on the stripping liquid subjected to heavy component removal treatment in the heavy component removal tower. The stripping liquid is subjected to light component removal and heavy component removal treatment, so that product purity reduction caused by mutual interference among components in subsequent treatment can be avoided. The extraction purity of the stripping liquid is effectively improved, so that the extracted stripping liquid has electronic-grade purity.

Description

Technical Field

[0001] The utility model relates to the field of waste liquid treatment, in particular to an electronic-grade stripping liquid extraction device. Background Art

[0002] Stripping fluid, also commonly known as stripping agent, is a liquid commonly used in chemical production. The main components of stripping fluid usually include solvents, organic ammonium and alcohol ethers. These components react to break the long-chain structure in the material to be stripped, thereby turning it into small molecules, which can be dissolved and fall off the surface of the material to be treated. During the stripping process, in order to prevent corrosion on the surface of the metal substrate, some special additives are usually added to the components of the stripping fluid. These additives can not only prevent corrosion, but also ensure that the stripping fluid is easy to clean and does not leave residue on the metal surface.

[0003] In view of the above-mentioned prior art, the inventors found that the existing stripping liquid contains a large amount of impurities, light components and heavy components because the stripping components need to be processed during use. If it is simply processed directly, it is difficult to effectively purify the stripping liquid, which affects its repeated use. Utility Model Content

[0004] In order to effectively improve the defects of existing organic waste gas treatment solutions, such as high cost and low purification efficiency, the present application provides an electronic-grade stripping liquid extraction device.

[0005] In the first aspect, the electronic-grade stripping liquid extraction device provided in the present application adopts the following technical solution:

[0006] An electronic-grade stripping liquid extraction device, comprising:

[0007] A light-removal device, wherein the light-removal device is provided with a light-removal tower for separating light components in the stripping liquid;

[0008] A de-weighting device, which is arranged on one side of the de-weighting device and is provided with a de-weighting tower, and the de-weighting tower is connected to the bottom of the de-weighting tower to perform de-weighting treatment on the stripping liquid from which the light components are separated in the bottom of the tower;

[0009] A distillation device is arranged on a side of the de-weighting device away from the de-lighting device and is provided with an ion exchange resin mixed bed for distilling the stripping liquid after the de-weighting treatment in the de-weighting tower.

[0010] By adopting the above technical scheme, the present application can ensure good separation efficiency by performing a technical scheme of removing light components and then removing heavy components on the stripping liquid. Since the properties of light components and heavy components are different, independent separation effectively improves the separation efficiency. On this basis, a purer product can be obtained by first removing light components and then removing heavy components. Because the separation of light components and heavy components is more thorough, the decrease in product purity due to mutual interference between components in subsequent processing can be avoided. At the same time, the present application further adopts a distillation device to perform a distillation treatment on it, which can effectively improve the extraction purity of the stripping liquid, so that the extracted stripping liquid has electronic grade purity.

[0011] Preferably, an electronic-grade stripping liquid extraction device further includes a pretreatment device, wherein the pretreatment device is arranged on a side of the light removal device away from the heavy removal device and the pretreatment device includes:

[0012] A filter, wherein the filter is provided with a filter assembly for filtering mechanical impurities in the stripping liquid;

[0013] A raw material intermediate tank is arranged at the output end of the filter, and a containing chamber is arranged in the raw material intermediate tank for homogenizing and storing the stripping liquid treated by the filtration.

[0014] By adopting the above technical solution, the present application first performs preliminary filtration and treatment of mechanical impurities in the stripping liquid through a filter, and then mixes materials from different directions under the storage conditions of the raw material intermediate tank to form a relatively stable material source. This homogenization effect can eliminate the fluctuation of the material during the flow process, making the material entering the next process stage more stable and consistent, which is crucial to ensuring product quality and improving the stability of the production process. On this basis, the storage of the raw material intermediate tank reasonably optimizes the production process and improves production efficiency.

[0015] Preferably, an electronic-grade stripping liquid extraction device further comprises a nanofiltration device, wherein the nanofiltration device is disposed on a side of the distillation device away from the deweighting device to perform nanofiltration treatment on the stripping liquid after distillation.

[0016] By adopting the above-mentioned technical scheme, the present application sets up a nanofiltration device after the distillation device. Through the nanopore size of the nanofiltration membrane set in the nanofiltration device, it can effectively separate substances with different molecular weights and achieve high-purity separation and purification. At the same time, the nanofiltration membrane has a high salt retention rate. Through filtration through the nanofiltration membrane, the salt and impurity ions in the stripping liquid can be removed to obtain a high-quality electronic-grade stripping liquid.

[0017] Preferably, the nanofiltration device comprises a high-pressure pump, which is disposed between the nanofiltration device and the distillation device and is used to pump the stripping liquid subjected to distillation treatment in the distillation device into the nanofiltration device.

[0018] Preferably, the light-removal tower is provided with a light-removal reboiler, and the light-removal reboiler is arranged on a side of the light-removal tower close to the bottom of the tower to heat and evaporate the material in the light-removal tower.

[0019] Preferably, the deweighting tower is provided with a deweighting reboiler, and the deweighting reboiler is arranged on a side of the deweighting tower close to the bottom of the tower to heat and evaporate the material in the deweighting tower.

[0020] Preferably, the light-removal device and the heavy-removal device are both provided with a condensation reflux device, and the two condensation reflux devices are respectively connected to the top of the light-removal tower and the heavy-removal tower to condense and reflux the evaporated materials in the light-removal tower and the heavy-removal tower respectively.

[0021] By adopting the above technical scheme, the present application evaporates the components in the mixture in the light removal tower and the heavy removal tower by setting a light removal reboiler and a heavy removal reboiler. These vapors are then condensed in a condenser to recover the light components. This structural setting not only improves the purity of the target substance, but also realizes the effective utilization of light components and heavy components.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The present application uses a technical solution of performing light removal treatment on the stripping liquid and then performing heavy removal treatment, which can ensure good separation efficiency. Since the properties of light components and heavy components are different, independent separation effectively improves the separation efficiency. On this basis, a purer product can be obtained by first performing light removal treatment and then performing heavy removal treatment. Because the separation of light components and heavy components is more thorough, the decrease in product purity due to mutual interference between components in subsequent treatments can be avoided. At the same time, the present application further uses a distillation device to perform distillation treatment on it, which can effectively improve the extraction purity of the stripping liquid, so that the extracted stripping liquid has electronic grade purity;

[0024] 2. The present application can ensure good separation efficiency by performing a technical solution of removing light components and then removing heavy components on the stripping liquid. Since the properties of light components and heavy components are different, independent separation effectively improves the separation efficiency. On this basis, a purer product can be obtained by first removing light components and then removing heavy components. Because the separation of light components and heavy components is more thorough, the decrease in product purity due to mutual interference between components in subsequent processing can be avoided. At the same time, the present application further uses a distillation device to perform a distillation treatment on it, which can effectively improve the extraction purity of the stripping liquid, so that the extracted stripping liquid has electronic grade purity;

[0025] 3. The present application uses a nanofiltration device installed after the distillation device. The nanopore size of the nanofiltration membrane installed in the nanofiltration device can effectively separate substances of different molecular weights to achieve high-purity separation and purification. At the same time, since the nanofiltration membrane has a high salt retention rate, the salt and impurity ions in the stripping liquid can be removed by filtering through the nanofiltration membrane to obtain a high-quality electronic-grade stripping liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the electronic-grade stripping liquid extraction device in the embodiment of the present application.

[0027] Explanation of the reference numerals: 1. Light-removal device; 11. Light-removal tower; 12. Light-removal reboiler; 2. Heavy-removal device; 21. Heavy-removal tower; 22. Heavy-removal reboiler; 3. Distillation device; 4. Pretreatment device; 41. Filter; 42. Raw material intermediate tank; 5. Nanofiltration device; 6. High-pressure pump; 7. Condensation reflux device. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1 This application is described in further detail.

[0029] The embodiment of the present application discloses an electronic-grade stripping liquid extraction device.

[0030] Example

[0031] See also Figure 1 The electronic-grade stripping liquid extraction device of this embodiment includes a pretreatment device 4, wherein the pretreatment device 4 includes a filter 41, which filters the stripping liquid to be treated to remove large particles of impurities. At the other end of the filter 41, a raw material intermediate tank 42 is connected through a diaphragm pump. The raw material intermediate tank 42 is provided with a receiving cavity to accommodate the stripping liquid that has been filtered. The stripping liquid is stored in the raw material intermediate tank 42, thereby forming a relatively stable material source. Then, under the homogenization treatment in the raw material intermediate tank 42, the fluctuation of the material in the flow process is eliminated, so that the material entering the next process stage is more stable and consistent.

[0032] At one end of the raw material intermediate tank 42 away from the filter 41, a light-removing device 1 and a heavy-removing device 2 are sequentially connected and arranged. The light-removing device 1 and the heavy-removing device 2 are respectively provided with a light-removing tower 11 and a heavy-removing tower 21. The material stored and homogenized in the raw material intermediate tank 42 first enters from the middle section of the light-removing tower 11 through a centrifugal pump, and is heated and evaporated by a light-removing reboiler 12 arranged at the bottom of the light-removing tower 11. The evaporated components are condensed by a primary condenser and a secondary condenser in a condensation reflux device 7 arranged at the top of the light-removing tower 11, and are then recovered and collected by a reflux tank, and the lower layer material is separated and re-conveyed to the light-removing tower 11 for light-removing treatment. The light-removing material is conveyed from the bottom of the light-removing tower 11 to the middle section of the heavy-removing tower 21 through a centrifugal pump.

[0033] The de-weighting reboiler 22 arranged at the bottom of the de-weighting tower 21 heats and evaporates the material, and the evaporated components are condensed by the primary condenser and the secondary condenser in the condensation reflux device 7 arranged at the top of the de-weighting tower 21, and then recovered and collected by the reflux tank, and the lower layer material is separated and re-transported to the de-weighting tower 21 for de-weighting. The de-weighted material is transported from the bottom of the de-weighting tower 21 to the inside of the distillation device 3 through a centrifugal pump.

[0034] An ion exchange resin mixed bed is provided in the distillation device 3. The stripping liquid is treated by the ion exchange resin mixed bed, which can effectively improve the extraction purity of the stripping liquid, so that the stripping liquid after extraction has electronic grade purity. At the other end of the distillation device 3, a high-pressure pump 6 is provided, and the material treated by distillation in the distillation device 3 is transported to the nanofiltration device 5 by the high-pressure pump 6, and the nanofiltration membrane in the nanofiltration device 5 is used for high-purity separation and purification to obtain high-quality electronic grade stripping liquid.

[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electronic grade stripping liquid extraction device, characterized in that: include: A light-removal device (1), wherein the light-removal device (1) is provided with a light-removal tower (11) for separating light components in the stripping liquid; A de-weighting device (2), the de-weighting device (2) being arranged on one side of the de-lightening device (1) and being provided with a de-weighting tower (21), the de-weighting tower (21) being connected to the bottom of the de-lightening tower (11) to perform de-weighting treatment on the stripping liquid from which the light components have been separated in the bottom of the tower; A distillation device (3) is arranged on a side of the de-weighting device (2) away from the de-lighting device (1) and is provided with an ion exchange resin mixed bed for distilling the stripping liquid after de-weighting treatment in the de-weighting tower (21).

2. The electronic-grade stripping liquid extraction device according to claim 1, characterized in that: The device further comprises a pre-treatment device (4), wherein the pre-treatment device (4) is arranged on a side of the light-removing device (1) away from the heavy-removing device (2), and the pre-treatment device (4) comprises: A filter (41), wherein the filter (41) is provided with a filter assembly for filtering mechanical impurities in the stripping liquid; A raw material intermediate tank (42), wherein the raw material intermediate tank (42) is arranged at the output end of the filter (41), and a containing chamber is arranged inside the raw material intermediate tank (42) for homogenizing and storing the stripping liquid after the filtering treatment.

3. The electronic-grade stripping liquid extraction device according to claim 1, characterized in that: It also comprises a nanofiltration device (5), which is arranged on a side of the distillation device (3) away from the deweighting device (2) to perform nanofiltration treatment on the stripping liquid after distillation.

4. The electronic-grade stripping liquid extraction device according to claim 3, characterized in that: The nanofiltration device (5) comprises a high-pressure pump (6), which is arranged between the nanofiltration device (5) and the distillation device (3) and is used to pump the stripping liquid treated by distillation in the distillation device (3) into the nanofiltration device (5).

5. The electronic-grade stripping liquid extraction device according to claim 1, characterized in that: The light-removal tower (11) is provided with a light-removal reboiler (12), and the light-removal reboiler (12) is arranged on a side of the light-removal tower (11) close to the bottom of the tower, so as to heat and evaporate the material in the light-removal tower (11).

6. The electronic-grade stripping liquid extraction device according to claim 1, characterized in that: The de-weighting tower (21) is provided with a de-weighting reboiler (22), and the de-weighting reboiler (22) is arranged on a side of the de-weighting tower (21) close to the bottom of the tower, so as to heat and evaporate the material in the de-weighting tower (21).

7. The electronic-grade stripping liquid extraction device according to claim 1, characterized in that: The light-removal device (1) and the heavy-removal device (2) are both provided with a condensation reflux device (7). The two condensation reflux devices (7) are respectively connected to the top of the light-removal tower (11) and the top of the heavy-removal tower (21) to condense and reflux the evaporated materials in the light-removal tower (11) and the top of the heavy-removal tower (21).

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