Apparatus and method for cleaning metal filter

Patent metadata

Field	Value
Publication number	US-12064720-B2
Application number	US-201917281754-A
Country	US
Kind code	B2
Filing date	Sep 11, 2019
Priority date	Sep 11, 2019
Publication date	Aug 20, 2024
Grant date	Aug 20, 2024

Abstract

A cleaning method according to the present invention comprises mounting the metal filter on a jig that is vertically elevatable and horizontally slidable in a cleaning bath so that the opening is faced downward, descending the jig so that a first nozzle installed in the cleaning bath enters the opening, injecting a predetermined amount of water and a cleaning solution into the cleaning bath so that the metal filter is immersed, spraying compressed air through the first nozzle to discharge bubbles of the compressed air toward an inner surface of the metal filter, draining the cleaning bath, spraying water through a second nozzle to remove the cleaning solution from the metal filter, and spraying the compressed air through the first nozzle to dry the metal filter. An apparatus for cleaning a metal filter is also disclosed.

First claim

The invention claimed is:

1. A method for cleaning a metal filter which has a cylindrical shape, in which an opening is provided in one side thereof, and has a through-hole in a side surface thereof so that when a fluid containing foreign substances is introduced into the opening, the foreign substances are filtered by the through-hole, and only the fluid is discharged through the through-hole, the method comprising:
mounting the metal filter on a jig that is vertically elevatable and horizontally slidable in a cleaning bath so that the opening is faced downward;
descending the jig so that a first nozzle installed in the cleaning bath enters the opening;
injecting a predetermined amount of water and a cleaning solution into the cleaning bath so that the metal filter is immersed;
while the metal filter is immersed in the water and the cleaning solution, spraying compressed air through the first nozzle to discharge bubbles of the compressed air toward an inner surface of the metal filter;
draining the cleaning bath;
spraying water through a second nozzle to remove the cleaning solution from the metal filter in the cleaning bath; and
spraying the compressed air through the first nozzle to dry the metal filter in the cleaning bath.

2. The method of claim 1 , wherein, after the spraying of the compressed air to discharge the bubbles, the jig is elevated to withdraw the first nozzle from the opening, the jig is slid horizontally, and then the jig is descended to allow the second nozzle to enter the opening from a lower side of the metal filter before the spraying of the water.

3. The method of claim 2 , wherein the foreign substances filtered by the metal filter are metal oxides, and the cleaning solution and the water that are injected into the cleaning bath are mixed with each other to obtain a pH concentration ranging from 1 to 2.

4. The method of claim 2 , wherein the compressed air that is sprayed through the first nozzle to dry the metal filter has a temperature of 100° C. to 150° C.

5. The method of claim 2 , wherein, during the spraying of the compressed air to discharge the bubbles, during the spraying of the water, or during the spraying of the compressed air to dry the metal filter, the jig is repeatedly elevated and descended.

6. The method of claim 2 , wherein, during the spraying of the compressed air to discharge the bubbles, during the spraying of the water, or during the spraying of the compressed air to dry the metal filter, the metal filter axially rotates.

7. The method of claim 2 , wherein the metal filter comprises:
an outer shell having a pipe shape and a plurality of through-holes; and
an inner shell inserted into an inner circumferential surface of the outer shell and having a pipe shape, the inner shell having through-holes each of which has a size less than each of the through-holes of the outer shell.

8. The method of claim 1 , wherein the first nozzle generates the bubbles under a top surface of the water and the cleaning solution when the cleaning bath is filled with the water and the cleaning solution, the first nozzle spraying the bubbles so that a point at which the bubbles contact the inner surface of the metal filter is higher than a point at which the bubbles are generated by the first nozzle.

Assignees

• Lg Chemical Ltd

Inventors

• Kim Hyun Uk
• Jang Sang Soo
• Park Young Su
• Kim Seong Bae
• Lim Yi Rang
• Park Kyoung Wan
• Kim Eun Hee

Classifications

• B01D2201/087

  using gas bubbles, e.g. air · CPC title

• B01D39/10

  Filter screens essentially made of metal · CPC title

• B01D29/68

  with backwash arms, shoes or nozzles · CPC title

• B01D29/15 Primary

  arranged for inward flow filtration · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title