SU856491A1 - Apparatus for filtering under vacuum - Google Patents

Description

(54) DEVICE FOR FILTERING UNDER A VACUUM

one

The invention relates to filtration, in particular to laboratory filters intended for the separation of process suspensions, and can be used to study the filtration properties of suspensions.

A laboratory filter is known that contains upper and lower glasses with nozzles for supplying vacuum and withdrawal of filtrate, a perforated supporting grid and a filter septum with sealing rings, vacuum line 1.

A disadvantage of the known filter is the complexity of the design, which requires careful fitting, hard work and considerable physical effort in assembling and disassembling the filter and fixing the filter septum, which significantly increases the duration of basic operations.

The purpose of the invention is to improve the quality of the filtering process by achieving a high tightness of the connection of parts and the use of a device for operating in bulk or submerged filtration modes.

This goal is achieved by the fact that in the device containing the upper and lower

glasses with nozzles for supplying vacuum and withdrawal of filtrate, perforated supporting grid and filtering wall with sealing rings, vacuum line, upper and lower glasses are made with end channels that are connected to the vacuum line.

In addition, depending on the use of the device, sealing rings can be fixed on one or both sides of the filter septum.

The device is universal and

10 can be used to investigate the filtering process in the mode of immersion filters with a horizontal filtering surface, such as a drum filter or with a side filtering surface, simulating a disk filter, and also a carousel, suction filter or suction filter.

FIG. 1 shows the device, a general view; in fig. 2 shows section A-A in FIG. one.

The device consists of a bottom cup 1 with an annular channel 2, equipped with 20 ceramics 3 and 4. A support grating 5 is installed in the upper part of the bottom glass, on which is placed a filter septum 6 with rubber sealing rings 7. An upper cup with an annular channel is mounted on the filter partition 9 and choke 10.

When operating in the bulk filter mode, the assembly of the filtering device is carried out as follows.

A grating 5 is installed on the lower cup 1, then the filter partition 6 is laid so that the sealing rings overlap the channel 2, the cup 8 with the channel 9 is placed on the sealing rings 7 and the vacuum is connected to the fittings 10 and 3. The vacuum created in the annular channels tightly connects the lower cup, the filtering wall and the upper cup into one. After this, the funnel is connected by fitting 4 through a collection of filtrate to a vacuum system and is carried out;

The slurry is poured into the upper cup 8 and filtered. After the filtration process is completed, the funnel is disconnected from the vacuum and the filtrate collector, the fixing vacuum is switched off and the funnel parts are freely separated. The precipitate with a filter septum is dried and weighed.

When operating in the submersible filter mode, the upper cup 8 is not used. A support penjeTKa 5 and a filter septum 6 are installed on the lower cup 1. A vacuum is connected to the fitting 3. After connecting the funnel through the nozzle 4 with the filtrate collector and the vacuum system, my filtration is carried out. In this case, the broom is stirred down by the filter partition in a horizontal or vertical position, simulating filtering with a submersible or side surface. Disassembly of the funnel after filtration is completed is carried out after vacuum is removed by communication of the system with the atmosphere.

The simplicity of the design, which does not require careful fitting of parts, facilitates and speeds up the preparation of the device, eliminates the hard work and considerable effort during disassembly and assembly, which significantly reduces their duration. Thus, the assembly of the filtering device with a threaded connection takes about 8-10 minutes, and with vacuum fixation, about 1 minute.

Threaded connections do not always provide a hermetic connection of parts, which is very often the displacement of fabric partitions, and this ultimately leads to the loss of the working vacuum and the passage of the solid phase into the filtrate. In the proposed device, the vacuum fixation of the septum provides hermetic attachment of the filter fabric and eliminates the side slip of the solid phase into the filtrate as well as the loss of vacuum.

The filtering device can be used successfully in rapid analyzes of the solids content in liquid and gaseous media.

The device is universal; in addition, it can be made not only from metal, but from other materials, such as organic glass, vinyl plastic, which facilitates its manufacture and allows its use in cases where the metal is not suitable.

Claims (3)

1. Vacuum filtering device containing upper and lower glasses with nozzles for supplying vacuum and withdrawal of filtrate, perforated support penjeTKy and filter partition with sealing rings and vacuum line, characterized in that, in order to improve the quality of filtration By achieving a high tightness of joining parts and expanding the range of work, the upper and lower glasses are made with end channels that are connected to a vacuum line. 2. The device on n. 1, characterized in that, when operating in the bulk filter mode, the sealing rings are fixed on both sides of the filter, and the partition walls are applied to it. 3. The device according to claim 1, characterized in that when operating in the mode of a submersible filter, the sealing ring is fixed on one side of the filter septum. Sources of information taken into account during the examination 1. V. Zhuzhikov. A. Filtration, M., “Chemistry, 1979, p. 159. YU ig. 2