SU735276A1 - Grid-type pressure filter for cleaning liquid - Google Patents

Description

one

The invention relates to filtration, in particular, to mesh pressure filters for cleaning liquid in water supply systems, chemical, coal and other sectors of the industry.

A known mesh pressure filter for cleaning a liquid, comprising a housing with a horizontally flat filter element installed in it, an input fluid supply nozzle, the jet of which is directed to the filtering surface, and nozzles for drainage of filtrate and sludge discharge.

The disadvantage of the filter is that. What is provided there is a partial regeneration of the filtering surface and for complete regeneration it is necessary to apply backwash.

A filter is also known that contains a mobile structured guide apparatus mounted under the filter element.

However, in such an outflow filter, a stream of fluid captures the contaminants drained from the filtering surface and presses them against the grid again. And since during filtering the amount of retained contaminants increases and most of them precipitate

In the net, after some time a dense precipitate forms on it, which is not washed away by the circulation flow. This leads to an intensive decrease in the filtration rate and necessitates frequent washing of the filter element with a reverse flow of filtrate at

90 termination filtering. All this reduces the performance of the filter.

The purpose of the invention is to intensify the process of regeneration of the filter element and improve the performance of the filter.

This is achieved by the fact that the source liquid supply nozzles are equipped with conical nozzles installed at an angle of 20-30 ° to the surface of the filter element, which is equipped with elastic plates, one end of which is rigidly fixed on the filter element and the second, 25 free, is pointed and j opposite conical nozzle.

This embodiment of the filter allows you to apply the source liquid with

high speed of the nozzles in the radial direction along the filter

else {p & yyrkhnosti and produce flushing of "contaminated contaminations" necrodriness r b caagelnymi streams of the original liquidity, while the speed

Center of Filtr

element is quenched by interacting with each other, thanks to

what is the loading of the 1styad10t wasps in the central part of the filter, where

no fluid movement. At the same time, the flow of free

Sharpened plates by streams ejected at high speeds TbKJ from the nozzles cause them to oscillate, which are transmitted to the mesh sheet. Due to this, the delayed contamination does not precipitate on the surface of the filtering element that is selected, but in the perturbed state in the near-bottom region and easily precipitate. This is nri is% to% intensive.

The silting rate of the screen in such a filter is significant; it reduces the 6th gb of the datum to reduce the usefulness of the figger, reduces the total flushing time and the consumption of wash water and, ultimately,

Since 7, the capacity of the unit is raised.

The drawing shows a filter, a general view.

The filter has a cylindrical body 1, inside of which a filtering net 2 is fixed in a horizontal plane. On two diametrically located connections 3 for supplying the source water there are conically mounted nozzles 4 placed at an angle of 20-30 ° to the surface of the filtering mesh 2. On

; pYe ydym: zerT1Le: Us at the same angle of the plate 5, pointed free

 Kotorhnh is located opposite the nozzles 4, Shiriya plates is equal to the diameter of the Nozzles; at the exit. Top filter closes

kg face 6. The lower conic part of the filter forms a tsamorse sampler 7, to which the T1 is connected to the nozzle 8 dYyperiodicheskogo ogr release

accumulated in. filtering process in the collector. A nozzle 9 serves to release the filtrate.

The filter works as follows. Liquid cleaning is applied under pressure through the nozzles 3 and is ejected at high speed from the nozzles 4. Since the nozzles are at an angle of 20-30 °, the liquid flowing out of them moves

radially along

filter mesh 2, while the main part of the liquid is filtered through a mesh cloth. Delays in filtering contaminants are continuously washed off by a tangential flow. and are driven toward the center of the filter element. In this area, the velocity of the radially converging flows is quenched due to their interaction with each other, due to which their weighing capacity is significantly reduced. And the impurities retained by the mesh screen fall into the sediment and accumulate in the sludge collector 7. At the same time, 4 jets of fluid discharged from the nozzles flow around the free pointed tips of the plates 5, causing the latter to fluctuate. Since the plates .5 with the other end are rigidly fixed on the elastic netted web, these vibrations are transmitted to the latter. Due to this, 2 contaminants retained by the filtering mesh are not deposited on its surface, but are in: suspended state and According to the measure of accumulation in the central part of the filter and increased pilotism due to sticking to each other easily precipitate, which is periodically removed from the sludge trap 7 when opening the valve (in hell, not shown) on the nozzle 8. The filtrate enters the consumer or for further processing through the nozzle 9.

The invention allows to increase by 1.5 times the duration of the filtration cycle, reduce the consumption of wash water and increase the filter capacity by 1.3 times.

Claims (1)

Invention Formula A mesh pressure filter for cleaning a fluid, comprising a housing with a horizontally flat mesh filter element installed in another, and pipes for supplying the original liquid, draining the filtrate and discharging sludge, characterized in that, in order to intensify the regeneration of the filter element and increase the filter capacity, the source pipes liquids are provided with conical NASA, which are installed at an angle of 20-30 ° to the surface of the filtrating element, which is provided with elastic plates one end of which is rigidly closed captured on the filter element, and a second, free, pointed and located opposite a conical nozzle. a and yyagaa.i ;, -i -. ,,: -.-: -.-: .--.