RU2124382C1 - Filter - Google Patents

Abstract

FIELD: facilities for cleaning water from agrochemicals. SUBSTANCE: filter has housing with filtering charge, branch pipes to let in influent water and let out filtering and washing water, floating partition, turning mechanism, augers one of which is installed in influent suspension chamber and provided with brush and the other, in filtrate chamber. EFFECT: increased efficiency of regeneration and capacity of filter. 3 cl, 3 dwg

Description

 The invention relates to filters for wastewater treatment and can be used in installations for the purification of water from agrochemicals.

 A backwash filter is known, comprising a housing with nozzles, a filtering partition, dividing the housing into a receiving chamber for the initial suspension and a filtrate chamber, and a device for regenerating the filtering partition, including pistons installed with the possibility of synchronous reciprocating movement, one of which is placed in the source chamber suspension, and the other in the filtrate chamber (see ed. certificate. USSR N 550165, B 01 D 29/38 1977).

 Its disadvantage is low operational reliability with a high content of abrasive particles and impurities in the initial suspension, since one of the pistons is placed in the chamber of the initial suspension.

 Also known is a pressure filter, taken as a prototype, containing a housing with a granular loading, inlet and outlet water distribution systems, a floating disk with conical nozzles fixed along the axis of the housing in its upper part, a flow swirl in the form of a spiral blade mounted on the inner wall of the housing ( see author's certificate of the USSR N 1579530, class B 01 D 29/60, 1990).

In the presented design during operation, the float may be skewed and hang in the filter housing. In addition, the placement of a spiral blade on the inner wall of the filter housing gives a laminar character to the movement of the liquid, and not to the same extent in the cross section of the filter (mainly in its peripheral part), which ultimately reduces the efficiency of the regeneration and the filtering process as a whole. In addition, in the process of supplying washing water with an open pipe along with impurities, there is a possibility of entrainment of a granular load
The purpose of the invention is improving the efficiency of regeneration and increasing the productivity of the device.

 The invention is illustrated in FIG. 1-3.

 The filter for water purification comprises a housing 1 with a granular charge 2 and a drainage distribution device in the form of a perforated partition 3 with drainage caps 4, nozzles for introducing the source water 5, discharging the filtrate 6, supplying and discharging the washing water 7 and draining the water 8, the floating partition 9 with inclined plates 10, a rotary mechanism with a drive 11, two screws 12, 13 located on both sides of the granular filter load and fixed on the axis of the rotary mechanism, the screw 12 has a brush 14 in the lower part. The filter is equipped with an electric contact anometrom filtrate discharge 15. Spigot 6 overlaps elektrozadvizhkoy 16 and tubes 7, 8 - the valves 17, 18. The rotary mechanism 19 is provided with a reversing device, providing an opposite rotation of the screws 12 and 13.

 The filter for water purification works as follows. The flow of source water through the pipe 5 enters the device and at the same time the turning mechanism 11 starts, the screw 12 is fixed on its shaft. When the screw 12 located in the original chamber is rotated, additional liquid pressure is created, part of the kinetic energy of which is transferred to move the partition 9 downward until it stops about the surface of the granular load 2. The inclined plates 10 arranged on the partitions 9 around the circumference accumulate water pressure and press it against the load with sufficient force. Next, the source water is filtered and enters the filtrate chamber, where the rotating screw 13 creates additional traction. The clarified water is removed through the pipe 6.

 With the accumulation of contaminants in the filter load 2, there is an increase in resistance to water pressure at the inlet of the device, which is fixed by an electric contact pressure gauge 15, the rotary mechanism 11 is turned off, the supply of water through the pipe 5 is stopped, the electric valve 16 on the pipe 6 is shut off, the electric valves 17 18 on the nozzles 7, 8 and then the reverse 19 of the rotary mechanism 11 is turned on with the rotation of the screws 12 and 13 in the opposite direction. After that, the washing water is supplied through the pipe 7, passes through the partition 3 with caps 4, lifts the movable partition 9 until the upper part contacts the brush 14 of the screw 12. When the water pressure acts on the plates 10, the partition 9 starts to rotate in the opposite direction of rotation of the screw 12 and occurs removal of adhering contaminants from the surface of the partition by the brush 14. In addition, the screw 13 feeds the washing water around the circumference, thereby creating a mixing of the granular charge.

 With impurities, water is removed through pipe 8.

 After the washing of the granular load is completed, the electric shutters 17, 18 on the nozzles 7, 8 are closed and after the deposition of the load 2 on the filter baffle 3, the cycle repeats.

Claims (3)

 1. A filter comprising a housing with filter loading, nozzles for introducing source water, drainage of filtrate and washing water, a floating partition with inclined plates, a rotary mechanism, characterized in that two screws are installed on the axis of the rotary mechanism, one of which is located in the source chamber suspension having a brush at the end, and the other in the filtrate chamber.  2. The filter according to claim 1, characterized in that the lower part of the screw of the chamber of the initial suspension is equipped with a horizontally fixed brush.  3. The filter according to claim 1, characterized in that the rotary mechanism is equipped with a reversing device.

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