SU1000068A1 - Liquid filter - Google Patents

Description

(54) FILTER FOR LIQUID

one

The invention relates to filtration, namely, suction filters for the separation of liquid suspensions, mainly in the production of highly pure substances and chemical reagents.

Known suction filter, comprising a housing with a bottom, a vacuum chamber. To increase the filtration area, a part of the body is perforated 1.

Also known is a suction filter comprising a vertical cylindrical body with a bottom, a perforated glass with filter cloth placed coaxially in it, in which, in turn, a hollow cylinder is coaxially positioned so that between them there is a sealed annular chamber. The presence of an annular sealed chamber between the hollow cylinder and the perforated cup allows filtration without an additional vacuum chamber, i.e., it simplifies the process 2.

A disadvantage of the known filter is that the presence of a gap between the bottom of the perforated cylinder and the lower edge of the hollow cylinder causes incomplete filtering of the fluid, i.e. before the end of filtration, air begins to pass through this gap into the annular chamber and a sharp drop in pressure difference occurs, and if you reduce the gap

5 then the precipitated solid phase in the filtering process may clog it. This reduces the efficiency of the filter. The design of the known filter also prevents the regeneration of the filtering fabric.

, Q reverse flow of the regenerating fluid, as in this case, the reverse flow of fluid rejects the filter cloth from the inner side surface of the perforated glass and presses the cloth to the outer surface of the hollow cylinder,

5 i.e. the movement of the regenerating fluid through the tissue during regeneration ceases.

The purpose of the invention is to increase the efficiency of the filter and ensure its regeneration by reverse flow.

20

Claims (2)

This goal is achieved by the fact that in a known filter comprising a vertical cylindrical body with a bottom, a perforated cup with filter cloth is placed coaxially in it. in which a hollow cylinder is placed coaxially, the latter is provided with ribs mounted radially on its outer surface, and a reverse truncated cone, reinforced in its lower part. In addition, the filter is equipped with a pipe installed coaxially in the hollow cylinder. Making the lower part of the hollow cylinder in the form of a truncated cone reduces the free cross-section of the transition of the liquid into the sealed annular chamber and thereby almost completely eliminates residual unfiltered liquid. Installing the pipe along the axis of the hollow cylinder allows air to be periodically introduced into the filtered fluid in the hollow cylinder and, by bubbling, stir the solid suspension in the fluid, not allowing it to settle and close the gap, and release the regenerating fluid when regenerating the filter fabric in reverse flow, which helps to reduce the consumption of regenerating fluid. The presence of ribs on the outer surface of the hollow cylinder prevents rejection of the filter fabric from the inner surface of the perforated glass by the reverse flow of the regenerating fluid network during regeneration. FIG. Figure 1 shows the filter for the liquid; in fig. 2 is a section A-A in FIG. 1. The fluid filter consists of a vertical cylindrical body 1 with a bottom 2 and a lid 3, in which a perforated cup 4 is placed coaxially with a filter cloth 5, in turn, a hollow cylinder 6 with ribs 7 on the outer surface and with a lower part, made in the form of a truncated cone 8 with a free section 9. Between the lateral inner surface of the perforated cup 4 and the outer surface of the hollow cylinder 6 is formed a sealed annular chamber 10. On the lid 3 there is a pipe 11, which mounted along the axis of the hollow cylinder 6, and a spout 12 is installed to introduce the filtered liquid into the filter. In the lower part of the housing I there is a nozzle 13 for outputting the filtered liquid, and in the upper part there is a connector 14 for introducing the regenerating liquid. The filter works as follows. The liquid is fed into the filter through fitting 12. The vacuum is switched on and the filtration process begins. At the same time, the liquid from the hollow cylinder 6 enters through the free section 9 of the truncated cone 8 into the hermetic annular chamber 10 and fills it. The liquid is filtered through the cloth 5. The filtered liquid is drawn through the shthuser 13. In the filtering process, periodically through the pipe 11 air is pumped into the liquid, which bubbles into the space of the hollow cylinder 6 and mixes the solid slurry, not allowing it to settle and clog the gap between the free section 9 a truncated cone-8 and a filter cloth 5 into two perforated cups 4. Upon completion of filtering, the air, due to the fact that the lower part of the hollow cylinder 6 is made in the form of a truncated cone 8, successively displaces the The current of the filtered fluid from the sealed annular chamber 10, the passage through the free section 9 of a truncated cone 8. When regenerated by reverse flow, the regenerating fluid is fed through the fitting 14 into the filter. In this case, the pipe 11 is connected to a container under vacuum. The regenerating fluid, the reverse flow through the fabric 5, cleans it from solid particles and with them is discharged through the pipe 11. The output of the regenerating liquid through the pipe 11 provides an economical consumption of the regenerating liquid, since the end of the pipe 11 is directly at the free section 9 of the truncated cone 8 therefore, the regenerating liquid is sucked away almost immediately from the annular sealed chamber 10. When the rib 7 is regenerated, the outer surface of the hollow cylinder 6 is prevented from tearing the fabric 5 from the internal surface. ited perforated cup 4 and pressed it to the outer surface of the hollow cylinder 6, vol. e. fabric 5 held in place. The invention makes it possible to increase the efficiency of the filtering process, to improve tissue regeneration. Claim 1. A fluid filter comprising a vertical cylindrical body with a bottom, a perforated glass with filter cloth placed coaxially in it, in which a hollow cylinder is placed coaxially, characterized in that, in order to increase the efficiency of the filter and ensure its regeneration by reverse flow, The hollow cylinder is provided with ribs mounted radially on its outer surface, and a reverse truncated cone, reinforced in its lower part. 2. A filter according to claim 1, characterized in that it is provided with a pipe installed coaxially in a hollow cylinder. Sources of information taken into account in the examination 1. USSR author's certificate number 383454, cl. On 01 D 29/04, 1968. 2. USSR author's certificate number 793602, cl. On 01 D 29/04, 1976. , "M t L one   R  W 789 FIG. ten A ±