SU1503861A2 - Filter for cleaning waste water - Google Patents

Abstract

The invention relates to devices for filtering solutions from fine impurities and sediments and can be used in industrial plants having sewage treatment plants. The purpose of the invention is to increase the efficiency of the filter by reducing the moisture content of the sediment. The waste water enters the housing 1 through the pipe 6, fills the cavity 12 between the branches of the filtering tape (FL) 2, and is filtered through it. After filling the cavities 12 of the rod 15 with sediment with FL-2 fixed on them, they are lowered into receivers 18, resulting in gradual compression of the branches of FL 2 with moisture being squeezed out through perforations in plates 19 and 20. The sediment is dehydrated to a predetermined degree of humidity when the traverse 16 lowered to the lowest position. 1 il.

Description

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The invention relates to devices for filtering solutions from fine impurities and sediments and can be used in industrial plants having sewage treatment plants.

The purpose of the invention is to increase the a ({) efficiency of the filter by reducing the moisture content of the sediment.

The drawing shows a filter for wastewater treatment, a longitudinal section.

The wastewater filter is a housing 1, inside which is mounted an infinite filter belt 2, an envelope, and stationary roller blocks 3 and moving 4, as well as a drive drum 5. There is a nozzle 6 for supplying waste water and for filtering it pipe 7. To clean the filter belt 2 from sediment, a knife 8 and slit nozzles 9 are mounted to remove sediment from the filter belt with water, installed in a sediment collector 10, which is connected by a pipe 11 to a filter housing cavity. reuse of backwash WATER.

To remove the sediment formed in the cavity 12 of the housing formed by the vertical branches of the filter belt 2, an additional drum 13 is mounted, having a through slot 14 in which the filter belt 2 is placed. The roller blocks 4 are fixed with the help of vertical shanks 15 on the cross bar 16, which installed in guide 17.

Receivers 18 mounted on the side walls of the housing AND made of two vertical perforated plates — left 19 and right 20 — the distance between which exceeds the diameter of the roller blocks .4. The upper ends of the plates 19 and 20 are located at an angle ω smaller than the angle p between the branches of the filter belt (in the lower position of the crosshead, a value sufficient to squeeze the sediment to a predetermined moisture level. A nut 21 interacting with the lead screw 22 is mounted on the crossbar 16, kinematically associated with the drive 23. The dehydrated sludge is unloaded onto the tray 24.

The filter for sewage treatment works as follows.

Waste water enters the enclosure. 1 through pipe 6, filling the cavity 12 between the branches of the filter mite 2, and filtering through it. The filtered water is discharged through the pipe 7.

At the end of the cleaning process, after filling the cavities 12 formed by the branches of the filter belt 2 with sediment, the drive 23 is turned on. The grass 16 moves along the spindle 22. The rods 15 move to the receivers 18. The branches of the filter tape 2 begin to interact with the upper ends of the plates 19 and 20.

Since the angle a between the ends of the plates is less than the angle p between the branches of the tape 2, in the process of lowering into the receiver 18 there is a gradual compression of the branches of the filter tape 2 with the moisture being squeezed out through perforations made in the plates 19 and 20. The sediment in the cavity 12 dehydrated to a predetermined degree of moisture.

The final dewatering of the precipitate to a given degree of moisture is achieved when the yoke 16 is lowered to its lowest position and the branches of the filter belt 2 are between the parallel portions of the plates 19 and 20.

After completion of the sludge dewatering process, it is removed periodically to restore filter performance. At the same time, the drives of the additional drum 13 and the drive 23 of the traverse 16 are simultaneously turned on. The height of the cavities 12 is reduced, and the sediment is taken out by the belt 2, cleaned with the knife 8 and dumped along the tray 24 into the carriage bucket (not shown).

To restore the filtering properties of the belt 2 after mechanically removing sediment from it, the nozzles 9 are flushed with water, which washes the sediment residues into the cavity of the collector 10. Complete rinsing of the entire belt 2 is achieved by reversing the switching of the drum 13 and traverse 16 until the traverse 16 is lowered to the bottom position. The drives are then re-connected and the yoke 16 is raised to its original operating position until an angle p is formed between the branches of the filter belt.

Wash water is settled in sediment collector 10. Separate water from the pipe 11 enters the cavity of the housing 1 for reuse, and the sediment is removed through a hatch in the bottom of the collector. The designs described above are preferred for practical use. However, there may be other modifications to the filter for wastewater treatment. For example, the number of branches of the filtering tray may be different, the angles of air between the ends of the plates of the receiver and the branches of the tape 2 may vary depending on

0 from the effluent types, the distance between the plates 19 and 20 of the receivers 18 can be adjustable to select the optimum parameters for sludge dewatering. The drive control of the drum 13 and the traverse 16 can be automated by installing 5

Claims (1)

novki relevant sensors. Claims for sewage treatment according to author. St. No. 1375284, characterized in that. 1503861 5o In order to increase the efficiency of working perforated plates, the distance of the filter by reducing the humidity of the sediments between which exceeds the diameter of the roller, it is equipped with receivers, is located blocks, and the upper ends of the flat on the axes of the rods under the filter flange are at an angle smaller than the angle of the tape and made of two vertical-tilt filter belt.