CN203899243U - A layered synchronous suction filtration device with different particle sizes - Google Patents

Abstract

The utility model discloses a layered synchronous suction filtration device with different particle sizes, which comprises a filter cup, a suction filtration bottle and a vacuum suction filtration pump. The mouth of the suction filtration bottle is connected with a funnel with a built-in filter plate. The tube is inserted into the suction filter bottle, and it is characterized in that, between the filter cup and the funnel, there are more than one layer of filters connected in series, a filter plate is set at the inlet of the filter, and a funnel-shaped guide tube is set under the filter plate; Filter membranes with different pore diameters are arranged on the filter plate, and the pore diameters of the filter membranes decrease from top to bottom. The different particle size layered synchronous suction filtration device of the utility model realizes the solid-liquid separation of the same sample according to different particle sizes at the same time, reduces the loss of the sample in the traditional layered filtration, improves the filtration efficiency and separation precision, and is effective It prevents the sample from being polluted during the transfer process, and has good practicability.

Description

A layered synchronous suction filtration device with different particle sizes

technical field

The invention relates to a solid-liquid separation device, in particular to a layered synchronous suction filtration device with different particle sizes.

Background technique

Suction filtration device is a commonly used solid-liquid separation device in the research of chemical industry, medicine, biology, etc. It has the characteristics of simplicity, high efficiency and convenience, and has been widely used in the field of solid-liquid separation. At present, there are many patents (applications) for the improvement of the suction filtration device. The purpose is to focus on the horizontal development of the suction filtration device, to achieve simultaneous suction filtration of multiple samples, or to improve the suction filtration device itself. make its structure more reasonable. These improvements have been well used in reality, improving filtration efficiency and shortening filtration time.

However, in the prior art, little attention has been paid to the vertical development of suction filtration devices, and there are few suction filtration devices that simultaneously perform solid-liquid layered separation according to different particle sizes for the same sample. For this problem, the method generally adopted in practice is the layered filtration method, that is, the solid with large particle size is separated by filtration with a large-pore filter membrane, and then the collected filtrate is transferred to other containers. After the membrane is removed, the filtrate is poured into a suction filtration device for secondary filtration. This method is cumbersome and inefficient, and the samples are easily contaminated during the transfer process. In addition, it is difficult for this method to filter the same sample in the same amount as the first time, because the sample will remain during filtration, and the suction filter must be cleaned with a part of the filtrate after each filtration to avoid Prevent impurities in the suction filtration device from interfering with the results, so that the sample after each filtration is less than the original. Therefore, this method is clearly deficient when quantitative layered separation of solids within the same sample is required (eg, phytoplankton, bacteria). the

Contents of the invention

The purpose of this utility model is to provide a layered synchronous suction filtration device with different particle sizes, which can overcome the defects of low layered suction filtration efficiency in the traditional layered filtration method, and it is difficult to perform equal layered filtration on the same sample , to avoid contamination of the sample during the secondary filtration transfer process, and realize simultaneous solid-liquid separation of the same sample according to different particle sizes.

In order to realize the purpose of the invention, the utility model adopts the following technical solutions:

A layered synchronous suction filtration device with different particle sizes, including a filter cup, a suction filtration bottle and a vacuum suction filtration pump, the mouth of the suction filtration bottle is connected to a funnel with a built-in filter plate, and the diversion tube at the lower end of the funnel is inserted into the suction filtration bottle Among them, it is characterized in that, between the filter cup and the funnel, there are more than one layer of filters connected in series, a filter plate is set at the inlet of the filter, and a funnel-shaped guide tube is set under the filter plate; the filter plate Filter membranes with different pore diameters are arranged on the top, and the pore diameters of the filter membranes decrease from top to bottom.

In the layered synchronous suction filtration device, the filter cup, the filter, the funnel and the suction filtration bottle are sealed and connected.

Preferably, the filter plate is a sand core filter plate.

Preferably, the filter cup, filter, funnel and suction flask in the device are all made of glass, and the joints of the device are all polished so that the device can be sealed.

The joints of the filter cup, the filter and the funnel are sealed and fixed by spring clips.

The funnel-shaped draft tube of the filter has a terminal length of about one-third of the filter.

The layered synchronous suction filtration device of the utility model connects more than one filter and filter membranes with different apertures in series between the funnel and the filter cup of the existing suction filtration device, so as to realize the simultaneous solid-liquid separation of the same sample according to different particle sizes. The filters are independent, and a corresponding number of filters can be installed according to the required number of layers.

A specific example of the layered synchronous suction filtration device of the present invention is a suction filtration device comprising two layers of filters. It consists of a filter, a filter bottle, and a vacuum filter pump. The functions of each part are as follows:

Filter cup: holds the sample to be filtered;

Large pore size filter membrane: retain solids larger than its pore size;

One-layer filter: perform solid-liquid separation of the first layer of large particle size solids, and collect the filtered filtrate, mainly including the filter plate (usually a sand core) in the inlet and the funnel-shaped guide tube;

Small pore size filter membrane: retain solids larger than its pore size;

Two-layer filter (funnel): for the solid-liquid separation of the second layer of small particle size solids, mainly including a funnel with a built-in filter plate (generally a sand core funnel can be used), connected to the mouth of the suction filter bottle;

Suction filtration flask: collect the filtrate after solid-liquid separation; preferably, the suction filtration flask is a conical conical flask;

Vacuum filter pump: remove the gas in the filter device, reduce the gas pressure in the device, and accelerate the solid-liquid separation.

Preferably, the added layer of filter (or more than one layer) is cylindrical, both ends are open, and the upper end inlet is provided with a filter plate (generally a sand core) for placing a filter membrane, and the diameter of the upper and lower ports is the same as that of the filter Cup and secondary filter (funnel) are the same.

There are mainly two types of filter diameters, one uses a filter membrane of Φ=47 mm, and the other uses a filter membrane of Φ=25 mm.

The beneficial effects of the utility model:

1. The layered synchronous suction filtration device of this utility model can simultaneously separate the solid and liquid of the same sample according to different particle sizes, avoiding the low filtration efficiency of the traditional layered filtration method and the difficulty in realizing the equivalent amount of the same sample according to different particle sizes. Technical problems of solid-liquid separation.

2. The layered synchronous suction filtration device of the utility model improves the efficiency of layered filtration, reduces the loss rate of samples, and improves the accuracy of solid-liquid separation.

3. The layered synchronous suction filter device of the utility model has a reasonable design and a simple structure, and the number of filters can be added or reduced according to the number of layers to achieve multiple purposes.

4. The operation of the layered synchronous suction filtration device of this utility model is the same as that of the general filtration device, and has the advantages of simple operation, easy mastery, simplicity and effectiveness.

Description of drawings

Fig. 1 is a structural schematic diagram of a layered synchronous suction filtration device of the present invention.

In the figure: 1. Filter cup, 2. Large-pore filter membrane, 3. One-layer filter, 4. Small-pore filter membrane, 5. Two-layer filter (funnel), 6. Suction filter bottle, 7. Vacuum suction filter Pump, 8, flexible pipe, 9, ventilation tube, 10, diversion tube, 11, filter plate (passing water net), 12, spring clip, 13, funnel-shaped diversion tube.

Detailed ways

Taking layered (two layers) separation of phytoplankton and bacteria in natural water as an example, as shown in Figure 1, a layered synchronous suction filtration device with different particle sizes, including a filter cup 1, a large-pore filter membrane 2, a layer of filter device 3 (or multiple filters as required), small-pore filter membrane 4, two-layer filter 5, suction bottle 6 and vacuum filtration pump 7. First, the second-layer filter 5 is sealed and installed on the suction filtration bottle 6, the second-layer filter 5 adopts a sand core funnel, and the guide tube 10 at the lower end is inserted in the suction filtration bottle 6; then the 0.2 um small-pore filter membrane for separating bacteria 4. Place it on the filter plate (water net) 11 of the second-layer filter 5, then install the first-layer filter 3 on the second-layer filter 5 with the small-aperture filter membrane 4 installed, and seal and fix it with a spring clip 12; The first layer of filter 3 is cylindrical, both ends are open, the upper and lower port diameters are the same as the filter cup 1 and the second layer of filter 5, and the upper end inlet is provided with a filter plate 11 (sand core filter plate), the filter plate 11 A funnel-shaped draft tube 13 is arranged below, and its end length is about 1/3 of the filter. Place the 2 um large-pore diameter filter membrane 2 on the filter plate (water filter) 11 of a layer of filter 3, and then install the filter cup 1 on the layer of filter 3 that has placed the large-pore diameter filter membrane 2, and use a spring The clamp 12 is sealed and fixed; the vent pipe 9 of the second-layer filter 5 is sealed and connected with the vacuum filter pump 7 by using a hose 8 .

Measure a certain amount of water sample to be filtered, slowly pour it into the filter cup 1, and then turn on the vacuum filtration pump 7 to start filtering; when both the filter cup 1 and the first layer of filter 3 are filtered, turn off the vacuum filtration Pump 7, and remove the filter cup 1, 2 um large-pore filter membrane 2, one-layer filter 3, 0.2 um small-pore filter membrane 4, and second-layer filter 5 from top to bottom. Finally, the phytoplankton on the large-diameter filter membrane 2, the bacteria on the small-pore filter membrane 4, and the sterile filtrate in the suction filter bottle 6 are obtained in the same equivalent sample, and the simultaneous solid-liquid separation of samples with different particle sizes is completed.

Claims (7)

1. A layered synchronous suction filtration device with different particle sizes, comprising a filter cup, a suction filtration bottle and a vacuum suction filtration pump, the mouth of the suction filtration bottle is connected to a funnel with a built-in filter plate, and the guide tube at the lower end of the funnel is inserted into the suction filter In the filter bottle, it is characterized in that: between the filter cup and the funnel, there are more than one layer of filters in series, the filter inlet is provided with a filter plate, and a funnel-shaped guide tube is provided under the filter plate; Filter membranes with different pore diameters are arranged on the filter plate, and the pore diameters of the filter membranes decrease from top to bottom. 2. The synchronous suction filtration device with different particle sizes layered according to claim 1, characterized in that: said filter cup, filter, funnel and suction filtration bottle are sealed and connected. 3. The synchronous suction filter device with different particle sizes layered according to claim 1, characterized in that: the filter plate is a sand core filter plate. 4. The different particle size layered synchronous suction filtration device according to claim 1, characterized in that: the filter cup, filter, funnel and suction filtration bottle in the device are all made of glass, and the joints of the device are all polished deal with. 5. The synchronous suction filtration device with different particle sizes layered according to claim 1, characterized in that: the joints of the filter cup, the filter and the funnel are fixed by spring clips. 6. The synchronous suction filtration device with different particle sizes layered according to claim 1, characterized in that: the funnel-shaped guide pipe of the filter has a length of 1/3 of the end of the filter. 7. The different particle size layered synchronous suction filtration device according to claim 1, characterized in that: the filter is cylindrical, both ends are open, and the upper end inlet is provided with a filter plate, and its upper and lower ends The caliber is the same as described for the filter cup and funnel.