Water treatment apparatus and water treatment method

Patent metadata

Field	Value
Publication number	US-2018134591-A1
Application number	US-201515102804-A
Country	US
Kind code	A1
Filing date	Jan 13, 2015
Priority date	Jan 23, 2014
Publication date	May 17, 2018
Grant date	—

Abstract

In a water treatment apparatus, a tilted plate is disposed at an incline relative to a horizontal plane. Water to be treated is passed over the upper surface of the tilted plate. A discharge forming body is disposed across a gas layer above a water film formed by the water to be treated flowing over the tilted plate. A droplet forming apparatus exerts power on the water film so that at least some of the water to be treated shoots upward in the form of droplets.

First claim

1 . A water treatment apparatus comprising:
a tilted plate disposed at an incline relative to a horizontal plane so that water to be treated flows over an upper surface thereof; a discharge forming body that is disposed across a gas layer above a water film formed by the water to be treated flowing over the tilted plate, and forms a discharge by applying a voltage between the discharge forming body and the tilted plate, and a droplet forming apparatus configured to perform an operation for exerting power on the water film so that droplets shoot up from the water film, wherein treatment is performed on the water to be treated by bringing the droplets, which are formed by the power exerted by the droplet forming apparatus, into contact with the discharge.

2 - 3 . (canceled)

4 . The water treatment apparatus according to claim 1 , wherein a plurality of water treatment units, each including the tilted plate and the discharge forming body, are disposed so as to be arranged in a vertical direction, and
the respective tilted plates are tilted in alternating opposite directions relative to the horizontal plane so that the water to be treated flows continuously downward from an uppermost water treatment unit to a lowermost water treatment unit.

5 . The water treatment apparatus according to claim 4 , wherein the water treatment units each further include a casing that surrounds the tilted plate and the discharge forming body, and
the casings of the water treatment units that are vertically adjacent are fastened to each other.

6 . The water treatment apparatus according to claim 1 , wherein at least one of a tilt angle of the tilted plate, a flow rate of the water to be treated, and a discharge power is adjustable.

7 . The water treatment apparatus according to claim 6 , further comprising:
a water quality meter that detects a water quality of the water to be treated; and a centralized control unit that adjusts at least one of the tilt angle of the tilted plate, the flow rate of the water to be treated, and the discharge power on the basis of information from the water quality meter.

8 . The water treatment apparatus according to claim 1 , wherein the droplet forming apparatus is an ultrasonic transducer.

9 . The water treatment apparatus according to claim 1 , wherein the droplet forming apparatus is an ultrasonic homogenizer.

10 . The water treatment apparatus according to claim 1 , wherein the droplet forming apparatus is a splashing mechanism that forms droplets by mechanically splashing the water to be treated upward while contacting the water to be treated.

11 . The water treatment apparatus according to claim 1 , wherein the droplet forming apparatus is a gas ejection apparatus that forms droplets by ejecting gas into the water to be treated so that the water to be treated splashes up.

12 . The water treatment apparatus according to claim 1 , wherein a narrow hole is provided in the tilted plate so as to penetrate the tilted plate in a thickness direction, and
the droplet forming apparatus is a gas ejection apparatus that forms droplets by ejecting gas upward through the narrow hole so that the water to be treated splashes up to shoot upward and form droplets.

13 . The water treatment apparatus according to claim 1 , further comprising a treatment tank that houses the tilted plate and the discharge forming body,
wherein a narrow hole is provided in the tilted plate so as to penetrate the tilted plate in a thickness direction, and the droplet forming apparatus is a gas circulation apparatus that takes in gas from the treatment tank and ejects the intake gas upward through the narrow hole.

14 . The water treatment apparatus according to claim 12 , wherein, on the tilted plate, a thickness of the water film covering the narrow hole is greater than a thickness of the water film covering a region of the tilted plate other than the narrow hole.

15 . The water treatment apparatus according to claim 14 , wherein the tilted plate includes a lower plate in which the narrow hole is provided and an upper plate that overlaps the lower plate,
a through hole is provided in the upper plate, an opening area of the through hole is larger than an opening area of the narrow hole, and in a condition where the upper plate overlaps the lower plate, the narrow hole is disposed so as to open onto the through hole.

16 . The water treatment apparatus according to claim 1 , wherein the droplets are caused to collide with the discharge forming body.

17 . The water treatment apparatus according to claim 1 , wherein the droplet forming apparatus is operated intermittently.

18 . The water treatment apparatus according to claim 1 , wherein the droplet forming apparatus is operated in synchronization with formation of the discharge.

19 . (canceled)

20 . A water treatment method for treating water to be treated comprising:
preparing a droplet forming apparatus configured to perform an operation for passing the water to be treated over an upper surface of a tilted plate disposed at an incline relative to a horizontal plane so that a water film is formed on the tilted plate while forming a discharge between the tilted plate and an electrode disposed above the water film across a gas layer, and droplets shoot up from the water film; and bringing the droplets formed by the power exerted by the droplet forming apparatus into contact with the discharge.

21 . A water treatment apparatus comprising:
a tilted plate disposed at an incline relative to a horizontal plane so that water to be treated flows over an upper surface thereof; a discharge forming body that is disposed across a gas layer above a water film formed by the water to be treated flowing over the tilted plate, includes at least a pair of electrodes, and forms a discharge by applying a voltage between the electrodes, and a droplet forming apparatus configured to perform an operation for exerting power on the water film so that droplets shoot up from the water film, wherein treatment is performed on the water to be treated by bringing the droplets, which are formed by the power exerted by the droplet forming apparatus, into contact with the discharge.

Assignees

• Mitsubishi Electric Corp

Inventors

• Oinuma Gaku
• Taki Masakazu
• Inanaga Yasutaka
• Takata Makoto

Classifications

• C02F1/722 Primary

  Oxidation by peroxides · CPC title

• C02F2303/04

  Disinfection · CPC title

• C02F1/78

  with ozone {(C02F1/4672 takes precedence)} · CPC title

• C02F2101/30

  Organic compounds · CPC title

• C02F1/36

  ultrasonic vibrations · CPC title