A kind of purification and decolorization device for sodium thiocyanate

Abstract

The utility model discloses a kind of purification decoloring device for sodium thiocyanate, including processing jar, the inner wall of processing jar is fixedly connected with filter screen, the upper portion of filter screen is equipped with dispersion mechanism, the inner wall of processing jar is fixedly connected with intercepting plate, the bottom of intercepting plate is fixedly connected with connecting pipe, the outer wall of connecting pipe is fixedly connected with first solenoid valve, the inner wall of processing jar is fixedly connected with nanofiltration membrane, the inner wall of processing jar is fixedly connected with activated carbon layer.The utility model integrates impurity filtration, depth purification, decoloring treatment and the like function in same core bearing structure, without needing to transport sodium thiocyanate liquid across equipment, both reduce manual operation step, and realize the continuous processing of purification decoloring, greatly improve overall processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of sodium thiocyanate processing technology, and in particular to a purification and decolorization device for sodium thiocyanate. Background Technology

[0002] Sodium thiocyanate, as an important chemical raw material, is widely used in textiles, pharmaceuticals, metallurgy, and other fields. Its purity and color directly affect the quality of downstream products. During the production or recovery of sodium thiocyanate, the raw material solution often contains suspended particles, insoluble impurities, organic impurities (such as thiourea and cyanide derivatives), high-valence anions (such as SO4²⁻), and small-molecule pigments, among other contaminants. These require purification and decolorization to meet industrial application standards; therefore, efficient purification and decolorization equipment has become a key requirement in the industry.

[0003] Currently, the industry mostly employs a segmented processing method for the purification and decolorization of sodium thiocyanate. This involves first removing suspended impurities through filtration equipment, then removing organic and ionic impurities through specialized purification equipment, and finally adsorbing pigments through decolorization equipment. This segmented processing method has significant drawbacks: firstly, each processing step requires independent operation and transfer, which not only increases the number of steps for workers but may also lead to secondary contamination of the liquid during transfer. Furthermore, the connection between equipment requires additional manual control, making continuous processing difficult and resulting in low overall processing efficiency. Secondly, the independent operation of segmented equipment requires more space, and the investment and maintenance costs are high, hindering large-scale industrial application. To address these issues, this application proposes a purification and decolorization device for sodium thiocyanate. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a purification and decolorization device for sodium thiocyanate. This device integrates functions such as impurity filtration, deep purification, and decolorization into the same core support structure, eliminating the need for cross-equipment transfer of sodium thiocyanate liquid. This reduces manual operation steps and enables continuous purification and decolorization, significantly improving overall processing efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A purification and decolorization device for sodium thiocyanate includes a processing tank. A filter screen is fixedly connected to the inner wall of the processing tank. A dispersing mechanism is provided above the filter screen. An interceptor plate is fixedly connected to the inner wall of the processing tank. A connecting pipe is fixedly connected to the bottom of the interceptor plate. A first solenoid valve is fixedly connected to the outer wall of the connecting pipe. A first connecting pipe is fixedly connected to the bottom of the connecting pipe. A high-pressure water pump is fixedly connected to the side wall of the processing tank. The first connecting pipe is fixedly connected to the high-pressure water pump. The high-pressure water pump is fixedly connected to a second connecting pipe. The first connecting pipe passes through the processing tank and is fixedly connected to it. The end of the second connecting pipe is fixedly connected to the side wall of the processing tank. A nanofiltration membrane and an activated carbon layer are fixedly connected to the inner wall of the processing tank.

[0006] Preferably, the top of the processing tank is fixedly connected to a feed hopper, the bottom of the processing tank is fixedly connected to a bottom discharge hopper, and the outer wall of the bottom discharge hopper is fixedly connected to a third electromagnetic valve.

[0007] Preferably, the dispersing mechanism includes a distribution plate fixedly connected to the inner wall of the processing tank, and the distribution plate has multiple through-holes distributed at equal angles.

[0008] Preferably, the interceptor plate is arranged in a funnel shape, and the connecting pipe is located at the bottom center of the interceptor plate.

[0009] Preferably, the side wall of the processing tank is fixedly connected to a side discharge hopper, the outer wall of the side discharge hopper is fixedly connected to a second electromagnetic valve, and the inner bottom of the side discharge hopper is flush with the top of the nanofiltration membrane.

[0010] Preferably, a control panel is fixedly connected to the front of the processing tank, and three equally spaced support legs are fixedly connected to the bottom of the processing tank.

[0011] Compared with the prior art, the advantages of this utility model are as follows: 1. This device integrates functions such as impurity filtration, deep purification, and decolorization into the same core support structure, eliminating the need for cross-equipment transfer of sodium thiocyanate liquid. This reduces manual operation steps and enables continuous purification and decolorization, significantly improving overall processing efficiency.

[0012] 2. This device is equipped with a special diversion structure at the liquid inlet, which can evenly disperse the sodium thiocyanate liquid before guiding it to the surface of the filter component, ensuring that the liquid can fully cover the filter component and avoiding the problem of local load concentration.

[0013] 3. This device is equipped with a dedicated power unit and liquid delivery channel, which can precisely control the liquid flow rate and pressure to ensure that the liquid can fully contact the deep purification components. Through the dual effects of pore size sieving and charge repulsion of the purification components, it can stably retain organic impurities such as thiourea and cyanide derivatives, and effectively repel high-valence anions such as SO4²⁻, greatly improving the stability and thoroughness of impurity removal.

[0014] 4. This device optimizes the connection structure between the purification component and the decolorization component, ensuring that the deeply purified liquid can flow evenly through the decolorization component, and the decolorization component can fully exert its adsorption function to efficiently remove small molecule pigments.

[0015] In summary, this device integrates functions such as impurity filtration, deep purification, and decolorization into the same core support structure, eliminating the need for cross-equipment transfer of sodium thiocyanate liquid. This reduces manual operation steps and enables continuous purification and decolorization, significantly improving overall processing efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a purification and decolorization device for sodium thiocyanate proposed in this utility model; Figure 2 This is a cross-sectional schematic diagram of a purification and decolorization device for sodium thiocyanate proposed in this utility model.

[0017] In the diagram: 1. Processing tank, 2. Feed hopper, 3. Distribution plate, 4. Inlet, 5. Filter screen, 6. Interception plate, 7. Connecting pipe, 8. First solenoid valve, 9. First connecting pipe, 10. High-pressure water pump, 11. Second connecting pipe, 12. Nanofiltration membrane, 13. Side discharge hopper, 14. Second solenoid valve, 15. Activated carbon layer, 16. Bottom discharge hopper, 17. Third solenoid valve, 18. Support leg, 19. Control panel. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Reference Figures 1-2 A purification and decolorization device for sodium thiocyanate includes a processing tank 1, which contains the purification and decolorization process of sodium thiocyanate. A feed hopper 2 is fixedly connected to the top of the processing tank 1. The feed hopper 2 is used to guide the sodium thiocyanate liquid into the processing tank 1 to prevent the liquid from overflowing during injection. A filter screen 5 is fixedly connected to the inner wall of the processing tank 1. The filter screen 5 can intercept suspended particles and insoluble impurities in the sodium thiocyanate liquid to achieve preliminary filtration.

[0020] A dispersing mechanism is provided above the filter screen 5. The dispersing mechanism includes a uniform distribution plate 3 fixedly connected to the inner wall of the processing tank 1. The uniform distribution plate 3, together with the feed hopper 2, plays a buffering role for the liquid and prepares for subsequent uniform diversion. Multiple openings 4 are provided through the uniform distribution plate 3. The multiple openings 4 can uniformly disperse the sodium thiocyanate liquid and ensure that the liquid can uniformly cover the filter screen 5 below. The multiple openings 4 are distributed at equal angles.

[0021] An interceptor plate 6 is fixedly connected to the inner wall of the processing tank 1. The interceptor plate 6 receives the liquid filtered by the filter screen 5, preventing the liquid from falling directly to the components below and facilitating subsequent conveying operations. A connecting pipe 7 is fixedly connected to the bottom of the interceptor plate 6, providing a conveying channel for the liquid on the interceptor plate 6, allowing the liquid to flow to the subsequent processing components. The interceptor plate 6 is funnel-shaped, and the connecting pipe 7 is located at the bottom center of the interceptor plate 6. A first solenoid valve 8 is fixedly connected to the outer wall of the connecting pipe 7, controlling the flow of liquid in the connecting pipe 7 and regulating the liquid conveying process. A first connecting pipe 9 is fixedly connected to the bottom of the connecting pipe 7, receiving the liquid conveyed by the connecting pipe 7 and guiding it to a high-pressure water pump 10. A high-pressure water pump 10 is fixedly connected to the side wall of the processing tank 1, providing power for the liquid flow and ensuring that the liquid can be smoothly conveyed to the designated location. The first connecting pipe 9 is fixedly connected to the high-pressure water pump 10. A second connecting pipe 11 is fixedly connected to the processing tank 1. The second connecting pipe 11 receives the liquid transported by the high-pressure water pump 10 and sends it back to the nanofiltration membrane 12 inside the processing tank 1. A first connecting pipe 9 passes through the processing tank 1 and is fixedly connected to it. The end of the second connecting pipe 11 is fixedly connected to the side wall of the processing tank 1. The nanofiltration membrane 12 is fixedly connected to the inner wall of the processing tank 1. The nanofiltration membrane 12 intercepts organic impurities and repels high-valence anions through the dual effects of pore size sieving and charge repulsion, thereby achieving deep purification of the liquid. A side discharge hopper 13 is fixedly connected to the side wall of the processing tank 1. The side discharge hopper 13 is used to discharge the concentrated water produced after filtration by the nanofiltration membrane 12. A second solenoid valve 14 is fixedly connected to the outer wall of the side discharge hopper 13. The second solenoid valve 14 can control whether the concentrated water in the side discharge hopper 13 is discharged, which is convenient for the staff to operate according to the needs. The inner bottom of the side discharge hopper 13 is flush with the top of the nanofiltration membrane 12. After filtration, it is ensured that the concentrated water above the nanofiltration membrane 12 can flow smoothly into the side discharge hopper 13.

[0022] An activated carbon layer 15 is fixedly connected to the inner wall of the processing tank 1. The activated carbon layer 15 adsorbs small molecule pigments in the sodium thiocyanate liquid through its rich pore structure and van der Waals forces, thereby achieving a decolorization effect. A bottom discharge hopper 16 is fixedly connected to the bottom of the processing tank 1. The bottom discharge hopper 16 is used to discharge qualified sodium thiocyanate liquid after purification and decolorization treatment. A third solenoid valve 17 is fixedly connected to the outer wall of the bottom discharge hopper 16. The third solenoid valve 17 can control the timing of the discharge of qualified liquid in the bottom discharge hopper 16.

[0023] A control panel 19 is fixedly connected to the front of the processing tank 1. The control panel 19 can control components such as the first solenoid valve 8, the high-pressure water pump 10, the second solenoid valve 14, and the third solenoid valve 17 to realize the automated operation of the device. Three support feet 18 with equal spacing are fixedly connected to the bottom of the processing tank 1. The three support feet 18 support the processing tank 1 together to ensure the stability of the entire device when it is placed.

[0024] All components in this device are designed to be corrosion-resistant and acid and alkali-resistant.

[0025] In this invention, the worker injects sodium thiocyanate liquid into the processing tank 1 through the feed hopper 2. The sodium thiocyanate liquid first contacts the equalization plate 3 and is evenly discharged through multiple outlets 4, so that the sodium thiocyanate liquid is evenly distributed on the filter screen 5. The filter screen 5 can filter suspended particles and insoluble impurities in the sodium thiocyanate liquid. Finally, the filtered sodium thiocyanate liquid accumulates on the interception plate 6. Opening the first solenoid valve 8 and starting the high-pressure water pump 10 can inject the sodium thiocyanate liquid into the nanofiltration membrane 12 through the first connecting pipe 9 and the second connecting pipe 11, so that the space between the interception plate 6 and the nanofiltration membrane 12 is filled with liquid. The sodium thiocyanate liquid is then forced through the water pressure. The sodium thiocyanate liquid is filtered through nanofiltration membrane 12 (utilizing the dual effects of pore size sieving and charge repulsion of nanofiltration membrane 12, organic impurities (such as thiourea and cyanide derivatives) can be retained, and because the membrane surface is negatively charged, it can repel high-valence anions such as SO4²⁻, further reducing the content of ionic impurities), removing organic impurities and organic wastewater from the sodium thiocyanate liquid (while the remaining concentrated water is discharged through side discharge hopper 13); finally, the sodium thiocyanate liquid is decolorized through activated carbon layer 15 (activated carbon has a large surface area and rich pore structure, which can adsorb small molecule pigments through "van der Waals forces"), achieving purification and decolorization processing, and finally the third electromagnetic valve 17 is opened to discharge and collect the liquid.

Claims

1. A purification and decolorization apparatus for sodium thiocyanate, comprising a processing tank (1), characterized in that, A filter screen (5) is fixedly connected to the inner wall of the processing tank (1). A dispersing mechanism is provided above the filter screen (5). An interceptor plate (6) is fixedly connected to the inner wall of the processing tank (1). A connecting pipe (7) is fixedly connected to the bottom of the interceptor plate (6). A first electromagnetic valve (8) is fixedly connected to the outer wall of the connecting pipe (7). A first connecting pipe (9) is fixedly connected to the bottom of the connecting pipe (7). A high-pressure water pump (10) is fixedly connected to the side wall of the processing tank (1). The first connecting pipe (9) is fixedly connected to the high-pressure water pump (10). A second connecting pipe (11) is fixedly connected to the high-pressure water pump (10). The first connecting pipe (9) passes through the processing tank (1) and is fixedly connected to it. The end of the second connecting pipe (11) is fixedly connected to the side wall of the processing tank (1). A nanofiltration membrane (12) is fixedly connected to the inner wall of the processing tank (1). An activated carbon layer (15) is fixedly connected to the inner wall of the processing tank (1).

2. The purification and decolorization apparatus for sodium thiocyanate according to claim 1, characterized in that, The top of the processing tank (1) is fixedly connected to the feed hopper (2), the bottom of the processing tank (1) is fixedly connected to the bottom discharge hopper (16), and the outer wall of the bottom discharge hopper (16) is fixedly connected to the third electromagnetic valve (17).

3. The purification and decolorization apparatus for sodium thiocyanate according to claim 1, characterized in that, The dispersing mechanism includes a dividing plate (3) fixedly connected to the inner wall of the processing tank (1), and a plurality of openings (4) are provided through the dividing plate (3), and the plurality of openings (4) are distributed at equal angles.

4. The purification and decolorization apparatus for sodium thiocyanate according to claim 1, characterized in that, The interceptor plate (6) is arranged in a funnel shape, and the connecting pipe (7) is located at the bottom center of the interceptor plate (6).

5. The purification and decolorization apparatus for sodium thiocyanate according to claim 1, characterized in that, The processing tank (1) has a side discharge hopper (13) fixedly connected to its side wall. The outer wall of the side discharge hopper (13) is fixedly connected to a second electromagnetic valve (14). The inner bottom of the side discharge hopper (13) is flush with the top of the nanofiltration membrane (12).

6. The purification and decolorization apparatus for sodium thiocyanate according to claim 1, characterized in that, The front of the processing tank (1) is fixedly connected to a control panel (19), and the bottom of the processing tank (1) is fixedly connected to three support legs (18) that are evenly distributed.

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