Multistage fiber filtering apparatus capable of selectively filtering

Patent metadata

Field	Value
Publication number	US-10596495-B2
Application number	US-201715629402-A
Country	US
Kind code	B2
Filing date	Jun 21, 2017
Priority date	Jun 22, 2016
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

Abstract

The present invention relates to a multistage fiber filtering apparatus capable of selectively filtering depending on turbidity of raw water, in which a first filtration mode where the raw water passes through a fiber ball medium, a second filtration mode where the raw water passes through a fiber yarn medium, or a third filtration mode where the raw water passes through both of the fiber yarn medium and the fiber ball medium may be selectively operated.

First claim

What is claimed is:

1. A multistage fiber filtering apparatus, comprising:
an enclosure configured to include an upper box and a lower box communicating with the upper box;
a strainer configured to be installed in the upper box along a longitudinal direction;
a plurality of fiber yarn media configured to surround an outer circumferential surface of the strainer to form a first filtering layer;
a plurality of fiber ball media configured to be built in the lower box to form a second filtering layer;
a first pipe configured to be formed on one side wall of a lower portion of the upper box and to introduce the raw water;
a second pipe configured to be formed on one side wall of a lower portion of the lower box and to discharge filtered water; and
a third pipe configured to be formed on one side wall of an upper portion of the lower box and to introduce the raw water or discharge the filtered water,
wherein a first filtration mode of raw water passing through the fiber ball medium, a second filtration mode of the raw water passing through the fiber yarn medium, or a third filtration mode of the raw water passing through both of the fiber yarn medium and the fiber ball medium, is selectively operated depending on turbidity of the raw water, and
wherein the raw water is selectively introduced into the first pipe or the third pipe depending on the turbidity and is selectively discharged through the second pipe or the third pipe depending on the turbidity.

2. The multistage fiber filtering apparatus of claim 1 , further comprising:
a turbidity meter configured to measure the turbidity of the raw water.

3. The multistage fiber filtering apparatus of claim 2 , wherein when the turbidity measured by the turbidity meter is low, the raw water is filtered by the first filtration mode; when the turbidity measured by the turbidity meter is medium, the raw water is filtered by the second filtration mode; and when the turbidity measured by the turbidity meter is high, the raw material is filtered by the third filtration mode.

4. The multistage fiber filtering apparatus of claim 1 , wherein in the first filtration mode, the raw water is introduced through the third pipe to pass through the fiber ball medium and then be discharged through the second pipe.

5. The multistage fiber filtering apparatus of claim 4 , wherein in the second filtration mode, the raw water is introduced through the first pipe to pass through the fiber yarn medium and then be discharged through the third pipe.

6. The multistage fiber filtering apparatus of claim 5 , wherein in the third filtration mode, the raw water is introduced through the first pipe to sequentially pass through the fiber yarn medium and the fiber ball medium and then be discharged through the second pipe.

7. The multistage fiber filtering apparatus of claim 6 , wherein the first pipe comprises:
a raw water inlet pipe provided with a raw water inlet control valve that controls an introduced amount of raw water; and
a backwashing water discharge pipe provided with a backwashing water discharge control valve that regulates a discharged amount of backwashing water.

8. The multistage fiber filtering apparatus of claim 7 , further comprising:
a first air inlet pipe connected to one side of the second pipe to introduce air during backwashing.

9. The multistage fiber filtering apparatus of claim 8 , further comprising:
a second air inlet pipe connected to one side of the third pipe to introduce air during backwashing.

10. The multistage fiber filtering apparatus of claim 9 , further comprising:
an air discharge pipe located on an upper surface of the upper box to discharge air.

11. The multistage fiber filtering apparatus of claim 6 , further comprising:
a controller configured to selectively introduce the raw water into the first pipe or the third pipe depending on the turbidity measured by the turbidity meter.

12. The multistage fiber filtering apparatus of claim 11 , wherein the controller controls the raw water to be introduced through the third pipe when the turbidity measured by the turbidity meter is low turbidity and controls the raw water to be introduced through the first pipe when the turbidity is medium turbidity or high turbidity.

13. The multistage fiber filtering apparatus of claim 12 , wherein a part of the second pipe is provided with a second pipe control valve for determining a discharged amount of filtered water.

14. The multistage fiber filtering apparatus of claim 13 , wherein a part of the third pipe is provided with a third pipe control valve for determining the introduced amount of raw water or the discharged amount of filtered water.

15. The multistage fiber filtering apparatus of claim 14 , wherein the controller controls the third pipe control valve and the second pipe control valve to be open when the raw water is of low turbidity so that the raw water is filtered by the first filtration mode.

16. The multistage fiber filtering apparatus of claim 15 , wherein the controller controls a control valve, which is located in the first pipe to regulate an introduced amount of raw water when the raw water is of medium turbidity, and the third pipe control valve to both be open and controls the second pipe control valve to be closed to filter the raw water by the second filtration mode.

17. The multistage fiber filtering apparatus of claim 16 , wherein the controller controls the control valve, which is located in the first pipe to regulate an introduced amount of raw water when the raw water is of high turbidity, and the second pipe control valve to both be open and controls the third control valve to be closed to filter the raw water by the third filtration mode.

18. The multistage fiber filtering apparatus of claim 1 , wherein a distribution plate provided with a plurality of distribution grooves is installed between the upper box and the lower box.

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

Assignees

• Doosan Heavy Ind & Construction Co Ltd
• Doosan Heavy Ind Constr Co Ltd

Inventors

• Lee Jung June
• Park Sung Won

Classifications

• B01D29/661

  by using gas-bumps · CPC title

• B01D39/02

  Loose filtering material, e.g. loose fibres · CPC title

• C02F1/004

  using large scale industrial sized filters · CPC title

• B01D29/668

  with valves, e.g. rotating valves for coaxially placed filtering elements · CPC title

• B01D29/23

  arranged for outward flow filtration · CPC title