SU1604417A1 - Self-cleaning filter - Google Patents

Abstract

The invention relates to self-cleaning filters and can be used in the food, chemical and other industries. The application of the invention will simplify the design of the self-cleaning filter, improve the quality of self-cleaning and reduce the unit cost of electricity for its implementation. The self-cleaning filter contains a tank 1, filter elements 2, a distributor 4 with a spool 5, a supply line 3 and a return line 9, filter partitions 10 with valves 11, an electric motor 14 with a gear 15, an expendable choke 12 with a valve 13, nozzles 8, discharge valve and return channels 6 and 7 of the distributor 4. 2 Il.

Description

The invention relates to self-cleaning filters and can be used to filter juices and water from suspended particles.

The purpose of the invention is to simplify the design of the filter, improving the quality of self-cleaning of its filter elements and reducing the cost of electricity for self-cleaning.

Figure 1: a self-cleaning filter is shown, general view; in fig. 2 is a section A-A in FIG. one.

The self-cleaning filter contains a tank 1, filter elements 2, a supply line 3, a distributor 4 equipped with a spool 5 with half ring discharge 6 and. returnable 7 channels, patches 8, return pipe 9, filter partitions 10 and dampers IV. The filter housing is equipped with a consumable fitting 12 with a valve .13, a. the spool 5 of the distributor 4 - drive, including the electric motor 14 and the gearbox 15.

The self cleaning filter operates as follows.

During operation, the electric motor 14, through the gearbox 15, causes the spool 5 to rotate around its axis, which, through separate channels 6 and 7, alternately connects the filter elements 2 to alternate alternating filtration processes in the liquid flowing under pressure from line 3, with the process of self-cleaning of filter barriers 10 with clean filtrate returning from pressure tank 1 under pressure through filter barriers 10 and nozzles 8 to the return line 9.

In the filtration phase C1 in the filter elements 2, the solution is directed onto the filter walls 10, which the flow pressure bulges towards its movement, stretching their outer surface and compressing their inner surfaces, from which the inlets narrow and the output sections of the mouths of the filter bar 10 expand. As a result, suspended particles of the solution are retained and accumulate on the surface of the filter walls 10. The filtrate passing through the mouth of the filter walls 10 leaves the filter elements 2 through its windows, deviating from Oron svobodnopodveshennye damper 11 and is accumulated in the tank 1 is raised.

five .

0

5 20 25

P , .

55

there is a hydrostatic pressure in it, and then, having overcome the resistance of the valve 13, the output, and then through the expendable connection 12.

In the order described, all the filtering elements 2 are simultaneously functioning, the nozzles 8 of which are currently connected by the semi-annular discharge channel 6 to the main 3, providing filtration of the liquid.

At the same time, the semi-circular return channel 7 provides free communication of the space between the tank 1 and the return line 9 through the corresponding filter elements 2, the nozzles 8 of which fall into the communication zone with the channel 7. I

Under these conditions, the self-cleaning phase b of the filter seals 10 is performed. For this, the filtrate in the tank 1 under overpressure partly rushes into the open passage to the return line 9. First, the flow moves the partition 10 with a bulge of volume-changing shape inside the filter element 2, why the surface of the partition 10, which in phase d was outside and extended, becomes internal and compressed, and compressed, conversely, expanded. Then the stream passes through the mouth of the partitions 10, washes away the sediment accumulated on it from the surface and moves it through the return line 9 to regeneration.

At the same time, due to an increase in the surface area that holds the sediment, achieved by turning it inside out and stretching the outer cover of the partition wall of a volume-varying shape, the size of the mouth of this shell also increases and releases the sediment particles stuck in them, and at the same time improves conditions for the return passage of the filtrate, the movement of which makes the process of self-cleaning of the partitions 10 smoothly carried out. Together with the return flow and under their own weight, the flaps 11 return to the vertical position, cover up the bottom. through the windows of the filter elements 2, preventing the return of the filtrate along the path of least resistance, and

guide it through the upper unshielded portion of the windows. This provides a more efficient cleaning of the filter walls 10 along the entire height of the filter elements 2.

In the transition phase from the distributor 4, with the help of the spool 5, with continuous motion, it performs a uniform switching of the main lines of the filtering elements 2 to the alternate change of the filtration phase with the self-cleaning phase. At the same time, the design of the apparatus, thanks to a multiple step size of the distributor 4, allows switching both connected and disconnecting highways in both phases of the apparatus while maintaining the total total working sections of the filtration flow and self-cleaning, which eliminates pulsation in the working system and contributes to maintaining the load .

As a result of the purification, a clear filtrate is obtained with a residual suspended matter content of up to 0.1%, which makes it possible to obtain in the stream a product corresponding to the norms of its consumption.

ten

five

15

20

25

0

Claims (1)

Invention Formula A self-cleaning filter containing a container with filtering elements made of filter partitions, a spool valve, a supply line, a return line and nozzles connecting the internal cavities of the filter elements with a spool valve, in order to simplify the filter design, to clean the quality of self-cleaning filtering elements and reducing the cost of electricity for self-cleaning; filter partitions are made of elastic material of a convex body shape The filtering element housings are made with free spaces relative to the filter partitions and are equipped with freely suspended gates, which are installed adjacent to the filtering partitions adjacent to the nozzles, while the discharge and return channels of the spool are evenly placed in a circle in the same plane with the nozzle windows and The angular step of the discharge channel is a multiple of the angular step of the return channel. Y /