Water-soluble hexavalent chromium filtering and collecting device

Abstract

The utility model relates to a water-soluble hexavalent chromium filtering and collecting device, which belongs to the field of laboratory collection, and comprises a Buchner funnel (1) and a tray (2), the Buchner funnel (1) comprises a funnel opening (3) and a funnel neck (4), the funnel neck (4) is arranged at the bottom of the funnel opening (3), the funnel neck (4) is connected with the tray (2), the Buchner funnel (1) is taken out, and a beaker (11) filled with filtrate is taken out at the same time. The Buchner funnel (1) is provided with a suction filtration bottle (5), the suction filtration bottle (5) is provided with an extraction opening (6), the extraction opening (6) is connected with an extraction pipe (7), the extraction pipe (7) is connected with the suction filtration bottle (5), and the suction filtration bottle (5) is connected with the suction filtration bottle (5). The exhaust pipe (7) is connected with a vacuum pump (8), so that the filtering effect is improved, and the filtering is faster.

Description

Technical Field

[0001] This utility model belongs to the field of laboratory collection, specifically, it relates to a water-soluble hexavalent chromium filtration and collection device. Background Technology

[0002] To collect water-soluble hexavalent chromium, cement mortar is poured into a separatory funnel for filtration. A small beaker is placed in the filtration apparatus, and after filtration, the beaker is picked up with tweezers. During the picking process, the flask often falls or tipps over due to insufficient force from the tweezers. Moreover, the process of using tweezers for each filtration is cumbersome, resulting in the loss of filtrate and making filtrate collection troublesome.

[0003] A search revealed a Chinese patent published on January 24, 2025, with publication number CN222384287U, which discloses a filter funnel comprising an inner filter layer and an outer drainage layer. The inner filter layer and the outer drainage layer are integrated into a single structure, with a negative pressure chamber between them. The inner filter layer has several circumferentially arranged filter holes on its sidewalls. However, during the filtration of water-soluble hexavalent chromium, frequent manipulation with tweezers is still required, and frequent transfer of the filtrate results in filtrate loss, making the operation cumbersome. Utility Model Content

[0004] The present invention aims to provide a filtration and collection device that prevents filtrate loss and is easy to operate.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A water-soluble hexavalent chromium filtration and collection device includes a Buchner funnel and a tray. The Buchner funnel includes a funnel opening and a funnel neck. The funnel neck is located at the bottom of the funnel opening and is connected to the tray.

[0007] The bottom of the Buchner funnel is equipped with a filtration flask, the filtration flask is equipped with a suction port, the suction port is connected to a suction pipe, and the suction pipe is connected to a vacuum pump.

[0008] The tray contains a beaker.

[0009] The funnel neck is lined with filter paper.

[0010] The bottom of the filtration bottle is provided with a sand layer.

[0011] The tray and funnel neck are threaded together.

[0012] The funnel neck is fixed to the top of the filtration flask by a rubber stopper.

[0013] The funnel opening is cylindrical, the funnel neck is conical, and the filtration flask is conical.

[0014] The top of the tray is conical, and the bottom of the tray is cylindrical.

[0015] The extraction tube is a rubber tube.

[0016] The technical advantages of this invention are as follows: By connecting the tray and the neck of the Buchner funnel, and placing a beaker inside the tray, the beaker containing the filtrate can be removed simultaneously with the removal of the Buchner funnel. This reduces the use of tweezers during the filtration process, prevents the beaker from tipping over due to the use of tweezers, avoids loss of filtrate, and facilitates the collection of the filtrate. Furthermore, since hexavalent chromium is highly toxic, this invention reduces the risk of exposure for operators, providing protection. The addition of a vacuum pump allows for faster filtration and prevents hexavalent chromium from being reduced to trivalent chromium. Attached Figure Description

[0017] This manual includes the following figures, which illustrate the following:

[0018] Figure 1 This is a schematic diagram of a water-soluble hexavalent chromium filtration and collection device.

[0019] Figure 2 for Figure 1 A schematic diagram of the structure of the middle Brinell funnel.

[0020] Figure 3 for Figure 2 Schematic diagram of the middle tray section.

[0021] The following are labeled in the diagram: 1. Buchner funnel; 2. Tray; 3. Funnel mouth; 4. Funnel neck; 5. Vacuum flask; 6. Vacuum port; 7. Vacuum tube; 8. Vacuum pump; 9. Sand layer; 10. Filter paper; 11. Beaker; 12. Rubber stopper. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of this utility model, and to facilitate its implementation.

[0023] like Figure 1 , Figure 2 and Figure 3As shown, a water-soluble hexavalent chromium filtration and collection device includes a Buchner funnel 1 and a tray 2. The Buchner funnel 1 includes a funnel opening 3 and a funnel neck 4, with the funnel neck 4 located at the bottom of the funnel opening 3. The funnel neck 4 is connected to the tray 2. By connecting the tray 2 to the funnel neck 4 of the Buchner funnel 1, and placing a beaker 11 inside the tray 2, the beaker 11 containing the filtrate can be removed simultaneously with the removal of the Buchner funnel 1. No tweezers are used during the filtration process, preventing the beaker from tipping over due to the use of tweezers and avoiding filtrate loss. This also facilitates the collection of the filtrate. In this embodiment, the filtrate is water-soluble hexavalent chromium. The connection between the tray 2 and the funnel neck 4 of the Buchner funnel 1 reduces contact between the operator and the hexavalent chromium solution during the filtration process, providing a safety protection effect.

[0024] The Buchner funnel 1 has a filtration flask 5 at its bottom, and a suction port 6 on the filtration flask 5. The suction port 6 is connected to a suction pipe 7, which is connected to a vacuum pump 8. As a sealed container, the filtration flask 5, together with the vacuum pump 8, can create negative pressure, forming a pressure difference with atmospheric pressure to drive rapid filtration and prevent solution leakage. The suction port 6 on the filtration flask 5 is connected to the suction pipe 7, which is connected to the vacuum pump 8. Hexavalent chromium is highly toxic; increasing the vacuum pump for filtration improves the filtration effect, makes filtration faster, and prevents hexavalent chromium from being reduced to trivalent chromium.

[0025] The tray 2 contains a beaker 11. The beaker 11 is placed in the tray 2 for the convenience of subsequent experiments or tests. The beaker 11 can be removed separately and then replaced with a new beaker 11 for repeated filtration. The hexavalent chromium solution can be poured directly into the tray 2. The tray 2 is made of plastic or metal, which may cause cross-contamination. The beaker 11 is made of glass and is more suitable for quantitative transfer.

[0026] A filter paper 10 is placed inside the neck 4 of the funnel. A filter paper 10 with a diameter slightly smaller than that of the Buchner funnel 1 is placed at the bottom of the funnel opening 3. Distilled water is added to wet it so that it adheres tightly. Under the action of negative pressure, the solution passes through the filter paper 10 into the tray 2, while solid particles are trapped on the surface of the filter paper 10, allowing the clear filtrate containing hexavalent chromium to enter the beaker inside the tray 2.

[0027] The bottom of the filtration flask 5 is provided with a sand layer 9. The sand layer 9 plays a role in dispersing pressure during the filtration process, preventing the filter paper 10 from being damaged due to excessive pressure; the sand layer 9 can provide buffering and fixation, and can prevent the filtrate from contaminating the filtration flask 5; when the tray 2 needs to be placed stably on the sand layer 9 at the bottom of the filtration flask 5, after installing the Buchner funnel 1 and the filtration flask 5, it is only necessary to set the height of the sand layer 9 to be the same as the height of the bottom of the tray 2, which can support the tray 2.

[0028] Tray 2 and funnel neck 4 are threaded together. When Buchner funnel 1 is removed, tray 2 and beaker 11 inside tray 2 can be removed at the same time. Rotate tray 2 to separate tray 2 and Buchner funnel 1, and remove beaker 11 containing hexavalent chromium solution. The filtration process is then complete.

[0029] The funnel neck 4 is fixed to the top of the filtration flask 5 by a rubber stopper 12. The funnel neck 4 is fixed to the opening of the filtration flask 5 by the rubber stopper 12 to ensure that the interface is airtight.

[0030] The funnel opening 3 is cylindrical, the funnel neck 4 is conical, and the filtration flask 5 is conical. The conical funnel neck 4 facilitates the filtration of solid-liquid mixtures containing hexavalent chromium. The conical filtration flask 5 has a smaller opening at the top, which largely ensures the airtightness of the filtration flask 5 and the Buchner funnel 1.

[0031] The top of tray 2 is conical, and the bottom of tray 2 is cylindrical. The top of tray 2 is conical with a small opening, which facilitates connection with the bottom of the funnel neck 4. The bottom of tray 2 is cylindrical, which facilitates the stable placement of beaker 11 on tray 2.

[0032] The suction tube 7 is a rubber tube. The rubber tube has excellent elasticity and deformation capacity, and it fits tightly with the suction port 6, effectively preventing the vacuum from decreasing due to leakage at the interface during the filtration process, and ensuring that the negative pressure is stably transmitted to the filtration bottle 5.

[0033] The working principle of this utility model is as follows: A beaker 11 is placed in a tray 2, and a sand layer 9 is placed in a filtration flask 5. The funnel neck 4 at the bottom of the Buchner funnel 1 is threadedly connected to the tray 2. The Buchner funnel 1 is fixed to the opening at the top of the filtration flask 5 by a rubber stopper 12. Filter paper 10, slightly smaller than the inner diameter of the Buchner funnel 1, is placed on the funnel opening 3 of the Buchner funnel 1. Distilled water is added to wet the paper and ensure it adheres tightly. A rubber suction tube 7 is connected to the suction port 6 of the filtration flask 5 and to a vacuum pump 8. The vacuum pump 8 is started to remove air from the flask, creating a negative pressure. Atmospheric pressure then draws the liquid... The filter paper 10 is quickly pressed into the beaker. After the filtration process is completed, the suction tube 7 is pulled out first, and then the vacuum pump 8 is turned off to prevent liquid backflow. The Buchner funnel 1 and the tray 2 are taken out. The tray 2 is unscrewed, and the beaker 11 containing the hexavalent chromium solution is taken out. This process does not cause loss of filtrate and facilitates the collection of filtrate. It also avoids excessive contact between the operator and the hexavalent chromium solution, thus providing protection. The beaker 11 and the tray 2 are fixed under the Buchner funnel 1, so that the beaker containing the filtrate can be taken out at the same time as the Buchner funnel is removed, which facilitates the collection of filtrate.

[0034] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A water-soluble hexavalent chromium filtration and collection device, characterized in that: It includes a Buchner funnel (1) and a tray (2). The Buchner funnel (1) includes a funnel opening (3) and a funnel neck (4). The funnel neck (4) is located at the bottom of the funnel opening (3) and is connected to the tray (2).

2. The water-soluble hexavalent chromium filtration and collection device according to claim 1, characterized in that: The bottom of the Buchner funnel (1) is provided with a filtration flask (5), the filtration flask (5) is provided with a suction port (6), the suction port (6) is connected to a suction pipe (7), and the suction pipe (7) is connected to a vacuum pump (8).

3. The water-soluble hexavalent chromium filtration and collection device according to claim 2, characterized in that: The tray (2) contains a beaker (11).

4. The water-soluble hexavalent chromium filtration and collection device according to claim 3, characterized in that: The funnel neck (4) is provided with filter paper (10).

5. The water-soluble hexavalent chromium filtration and collection device according to claim 4, characterized in that: The bottom of the filtration flask (5) is provided with a sand layer (9).

6. A water-soluble hexavalent chromium filtration and collection device according to any one of claims 1-5, characterized in that: The tray (2) and the funnel neck (4) are threaded together.

7. A water-soluble hexavalent chromium filtration and collection device according to any one of claims 1-5, characterized in that: The funnel neck (4) is fixed to the top of the filtration flask (5) by a rubber stopper (12).

8. A water-soluble hexavalent chromium filtration and collection device according to any one of claims 2-5, characterized in that: The funnel opening (3) is cylindrical, the funnel neck (4) is conical, and the filtration flask (5) is conical.

9. A water-soluble hexavalent chromium filtration and collection device according to any one of claims 1-5, characterized in that: The top of the tray (2) is conical, and the bottom of the tray (2) is cylindrical.

10. A water-soluble hexavalent chromium filtration and collection device according to any one of claims 2-5, characterized in that: The air extraction pipe (7) is a rubber tube.

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