SU1493282A1 - Liquid-cleaning filter - Google Patents

Abstract

This invention relates to fluid cleaning filters. The goal is to improve serviceability and reduce the size of the filter. The filter consists of body 1, top 2 and bottom 3 caps, pipe (P) 4 for supplying the initial suspension and discharging the wash water, P 5 draining the filtrate and supplying water for washing, P 6 supplying compressed air. Inside the housing 1, upper 7 and lower 8 horizontal partitions are fixed, between which there is a filtering load 9, a central 10 and peripheral 11 perforated pipes. A removable cover 13 is fixed to the upper partition 7 with a cylindrical screen 14 mounted coaxially to the central pipe 10. Valves 16 are installed on P 5 and 6, the locking elements 17 of which are connected by means 18 with floats 19 placed in the filtrate chamber 20. The purified water is fed in a radial direction from the center to the periphery. The regeneration is carried out without expanding the filter bed with air supplied through P 6 and water radially from the periphery to the center. 2 Il.

Description

The upper partition 7 is fixed with a removable cap 13 with a cylindrical screen 14 mounted with a coaxial central pipe 10. Valves 16 are installed on P 5 and 6, the locking elements 17 of which are connected by means of 18 with floats 19 placed in the filtrate chamber 20. The purified water is fed in a radial direction from the center to the periphery. The regeneration is carried out without expanding the filter bed with air supplied through P 6 and water radially from the periphery to the center. 2 Il.

The invention relates to devices for the purification of liquids from mechanical impurities by filtration and can be used, for example, in the chemical, metallurgical, mining and other industrial sectors, as well as in public utilities.

The aim of the invention is to improve serviceability and reduce the size of the filter.

FIG. 1 shows a schematic filter, a general view; in fig. 2 is a section A-A in FIG. one.

The filter consists of a housing 1, an upper 2 and a lower 3 attached to the body of the nozzle 4 for supplying the initial slurry and draining industrial water, a nozzle 5 for draining the filtrate and supplying water for washing and a nozzle 6 for supplying compressed air attached to the lids. Inside the housing 1 are fixed, for example, by welding the top 7 and bottom 8 horizontal partitions, between which there is a filtering load 9 and drainage-distribution equipment in the form of the central 10 and peripheral 11 perforated pipes, covered in order to avoid leaks of the filtering load, for example, mesh and fixed on partitions, for example, using nuts. In the upper horizontal partition, there is a hole 12 in the central part, in which a removable cover is installed, 13, having a cylindrical screen 14 rigidly attached to its underside, mounted coaxially to the central pipe 10 and immersed in the filtering load 9. For fixing the central pipe 10 to the clamp 13 there is a bolt lock 15.

On the nozzles 5, 6 of the outlet, the filtrate and the compressed air supply, respectively, are fitted with valves 16, the closure elements 17 of which are connected by means of gaskets 18 with floats 19 placed

0

five

0

five

,

0

five

0

in the filtrate chambers 20. The floats 19 are mounted on the belts 18 with, for example, nuts 21. Vertical movement of the locking elements 17 and floats 19 is provided by the stops 22 fixed to the pipes 5 and 6 and by the brackets 23.

The functional purpose of the lid with a cylindrical screen fixed on it coaxially to the central perforated tube is to eliminate liquid overflows from the central tube to the peripheral tubes over the filter loading layer, to ensure convenience of filling the filter housing with filter loading, and in general makes it possible to reduce the dimensions of the filter and simplify its design.

The valves installed on the nozzles of the filter outlet and the compressed air supply, whose shut-off elements are connected with floats placed in the filter chambers, ensure that the air or filtrate is uniformly removed from the filter housing, along the thickness of the impregnation of the washing liquid. the entire height of the filtering load removal from its pores under the influence of compressed air washing liquid. This allows the regeneration of the filter charge to be regenerated without expanding it and, ultimately, to refuse collectors for supplying and discharging the washing liquid from the free volume in the upper part of the filter, i.e. greatly simplify the design of the filter and reduce its size.

The filter works as follows.

The liquid (suspension) is cleaned from suspended solids through the pipe 4 to the central perforated tube 10. Pass through the filter material 9 and clean

contamination, the liquid (filtrate) enters the peripheral perforated pipes 11, the lower filtrate chamber 20 and more. The valve 16 is opened through the branch pipe 5 of the filtrate through the float 19 opened by means of the Float 19.

The regeneration of the contaminated filter material is carried out by alternately applying compressed air and a return flow of the filtrate. Initially, compressed air is supplied through nozzle 6, which, filling the upper chamber 20 of the filtrate of the cavity of the peripheral pipes 11 and the lower chamber 20 of the filtrate, removes the filtrate from the filter housing through the open valve 16 and nozzle 5. When the level of the filtrate is lowered, the float 19 drops. 18, the valve 17 closes the valve 16 with a stop element. After that, compressed air from the peripheral pipes 11 passes through the filter loading 9 into the central pipe O and further into the nozzle. In this case, the retained contaminants are removed from the load 9 together with the fluid in the pores.

Then filtering water is impregnated with water, which is fed through pipe 5 and alternately filling the lower chamber 20 of the filtrate, the cavity of the peripheral pipes 11 and the upper chamber 20 of the filtrate, removes air from the inside of the filter through the open valve 16 on the pipe 6. When the water level rises in the upper chamber 20 of the filtrate the float 19 is lifted and with the help of the gig 18

17 closes the valve 16. Thereafter, water from the peripheral pipes 11 passes into the central pipe 10 through the filter charge 9, impregnating it.

Further, compressed air is supplied through the pipe 6 to the filter again. After a certain number (4-8) cycles of supplying compressed air and impregnating the load with water sufficient to restore the filtering capacity of the load, the filter switches to filtering mode.

Claims (1)

Invention Formula A fluid purification filter, comprising a housing with upper and lower lids, located along the axis of the housing and at its inner walls, drainage and distribution means, upper and lower horizontal partitions, placed by melodies with granular partitions filtering feed and attached to the covers and body and removal of compressed air and liquid, characterized in that, in order to improve serviceability and reduce the size of the filter, an opening is made in the upper partition in the central part The rum is fitted with a removable lid, having a cylindrical screen rigidly attached to its underside, and nozzles attached to the lids of the case are fitted with valves, the X7 high locking elements have floats attached to them by means of t g. /