Fiber filtering apparatus

Patent metadata

Field	Value
Publication number	US-10549217-B2
Application number	US-201715725151-A
Country	US
Kind code	B2
Filing date	Oct 4, 2017
Priority date	Jun 3, 2016
Publication date	Feb 4, 2020
Grant date	Feb 4, 2020

Abstract

A fiber filtering apparatus includes: an enclosure including an upper box and a lower box communicating with the upper box; a strainer installed in the upper box along a longitudinal direction; a plurality of fiber yarn media configured to be fixed to upper and lower fixing means each coupled to upper and lower parts of the strainer; a plurality of fiber ball media configured to be embedded in the lower box to form a second filtering layer; a first pipe configured to be formed on one side wall on the lower part of the upper box and introduced with raw water during filtration and drain backwashing water during backwashing; and a second pipe formed on one side wall on a lower part of the lower box and drain filtered water during the filtration and introduced with washing water during the backwashing.

First claim

What is claimed is:

1. A fiber filtering apparatus, comprising:
an enclosure that includes an upper box and a lower box in communication with the upper box;
a strainer disposed in the upper box and extending in a longitudinal direction;
a plurality of fiber yarn media operable to be respectively fixed to upper and lower fixing portions, the upper and lower fixing portions respectively coupled to upper and lower parts of the strainer to form a first filtering layer;
a plurality of fiber ball media operable to be disposed in the lower box to form a second filtering layer;
a first pipe coupled to a sidewall of a lower part of the upper box operable to receive raw water from source of raw water through a raw water introduction pipe during filtration and drain backwashing water through a backwashing water drain pipe during backwashing;
a second pipe coupled to a sidewall of a lower part of the lower box operable to drain filtered water during the filtration and receive washing water from source of washing water during the backwashing: and
a third pipe coupled to a side wall of an upper part of the lower box and operable to receive the washing water from the source of washing water during the backwashing.

2. The fiber filtering apparatus of claim 1 , wherein
the second pipe is operable to receive washing water from the source of washing water that primarily washes the fiber ball medium and secondarily washes the fiber yarn media as a water level in the enclosure rises, and
the backwashing water drain pipe of the first pipe is operable to drain the backwashing water to backwash the fiber ball medium in a first backwashing mode.

3. The fiber filtering apparatus of claim 2 , wherein the first pipe includes:
the raw water introduction pipe coupled with a raw water introduction control valve that is operable to regulate an amount of the raw water that is introduced into the raw water introduction pipe from the source of raw water; and
the backwashing water drain pipe coupled with a backwashing water drain control valve that is operable to regulate a drained amount of the backwashing water received from the source of washing water through the second pipe.

4. The fiber filtering apparatus of claim 3 , further comprising a first air introduction pipe coupled to a side of the second pipe and operable to introduce air from source of pressurized air during the backwashing.

5. The fiber filtering apparatus of claim 4 , wherein
a lower surface of the lower box includes a flat plate portion that includes a plurality of strainer nozzles and an outer portion having an inclined surface.

6. The fiber filtering apparatus of claim 5 , further comprising a second air introduction pipe coupled to a side of the third pipe and operable to introduce air from the source of pressurized air during the backwashing.

7. The fiber filtering apparatus of claim 6 , wherein
the third pipe is operable to receive the washing water that washes the fiber yarn medium, and
the first pipe is operable to drain the backwashing water that backwashed the fiber yarn medium in a second backwashing mode.

8. The fiber filtering apparatus of claim 7 , further comprising an air drain pipe coupled to an upper surface of the upper box and operable to drain air introduced during the backwash.

9. The fiber filtering apparatus of claim 7 , further comprising a controller configured to selectively supply the washing water received from the source of washing water to the second pipe or the third pipe based on a pollution level of the fiber ball medium.

10. The fiber filtering apparatus of claim 9 , further comprising a pollution measuring unit configured to measure the pollution level of the fiber ball medium.

11. The fiber filtering apparatus of claim 10 , wherein the controller is configured to control the second backwashing mode to perform the backwashing if the pollution level measured by the pollution measuring unit is low, and to control the first backwashing mode to perform the backwashing if the pollution level measured by the pollution measuring unit is high.

12. The fiber filtering apparatus of claim 10 , wherein the pollution measuring unit is configured to measure a pressure in the lower box to measure the pollution level.

13. The fiber filtering apparatus of claim 9 , wherein
the second pipe is coupled with a second pipe control valve operable to control a drained amount of the filtered water or an introduced amount of the washing water, and
the first air introduction pipe is coupled with a first air introduction control valve operable to control an amount of the introduced air.

14. The fiber filtering apparatus of claim 13 , wherein
the third pipe is coupled with a third pipe control valve operable to control the introduced amount of the washing water, and
the second air introduction pipe is coupled with a second air introduction control valve operable to control the amount of the introduced air.

15. The fiber filtering apparatus of claim 14 , wherein the controller is configured to control the first backwashing mode to perform the backwashing by opening the second pipe control valve to introduce the washing water and opening the first air introduction control valve to introduce pressurized air, after the raw water introduction control valve is closed and the backwashing water drain control valve is open.

16. The fiber filtering apparatus of claim 15 , wherein the controller is configured to control the second backwashing mode to perform the backwashing by opening the third pipe control valve to introduce the washing water and opening the second air introduction control valve to introduce the pressurized air, after the raw water introduction control valve is closed and the backwashing water drain control valve is open.

17. The fiber filtering apparatus of claim 7 , wherein the lower part of the strainer includes a backwash nozzle unit, and the backwash nozzle unit is operable to inject air, which is introduced into an upper part of the lower box through the second air introduction pipe, upwardly, so that the fiber yarn medium is rubbed by the backwashing water and the air injected upwardly.

18. The fiber filtering apparatus of claim 1 , wherein a distribution plate that includes a plurality of distribution openings is disposed between the upper box and the lower box.

19. The fiber filtering apparatus of claim 1 , wherein a lower end of the upper box is provided with a swash plate arriving from a lower end of the strainer to an outer surface of the lower box along a circumferential direction.

Assignees

• Doosan Heavy Ind Constr Co Ltd

Inventors

• Park Sung Won
• Lee Jung June

Classifications

• B01D2201/186

  Pore openings which can be modified · CPC title

• B01D35/10

  Brush filters {; Rotary brush filters} · CPC title

• B01D29/78

  for washing · CPC title

• B01D29/66

  by flushing, e.g. counter-current air-bumps · CPC title

• B01D29/6438

  nozzles · CPC title