Patent ID: 9687758
Date: 2017-06-27
CPC Classifications: B01D

Claim:
1. A foam removing device comprising: a non-rotating liquid container accommodating a foam-containing liquid containing air bubbles; a foam-containing liquid supply pipe configured to supply the foam-containing liquid to the non-rotating liquid container; an air bubble outlet pipe attached to the foam-containing liquid supply pipe, to guide air bubbles to outside of the non-rotating liquid container, where the air bubbles are concentrated to an area adjacent to a rotating axis of the non-rotating liquid container by centrifugal separation acted on the foam-containing liquid by rotation of the foam-containing liquid in the non-rotating liquid container, and a foam-removed liquid outlet pipe configured to guide a foam-removed liquid to outside of the non-rotating liquid container, where the foam-removed liquid is the foam-containing liquid from which air bubbles contained are removed as the foam-containing liquid is moved in a direction away from the rotating axis of the non-rotating liquid container, and the air bubbles are concentrated to the area adjacent to the rotating axis by centrifugal separation, wherein the foam removing device contains a cylindrical inner rotating cylinder, which is provided in the non-rotating liquid container, and is rotated with a cylindrical axis thereof as a center, wherein the foam-containing liquid supply pipe is configured to supply the foam-containing liquid to an inner side of the inner rotating cylinder, wherein the air bubble outlet pipe is equipped with an air bubble outlet provided at a position on an inner side of the inner rotating cylinder adjacent to the cylindrical axis, where the air bubble outlet is configured to receive the air bubbles, wherein the inner rotating cylinder contains a foam-removed liquid guide hole formed therein, where the foam-removed liquid guide hole is configured to guide the foam-removed liquid reached to an area adjacent to a perimeter surface of the inner rotating cylinder by the centrifugal separation into a foam-removed liquid accommodating space between an outer surface of the inner rotating cylinder and an inner surface of the non-rotating liquid container, wherein a foam-removed liquid outlet opening is provided in the foam-removed liquid accommodating space of the non-rotating liquid container, where the foam-removed liquid outlet opening is configured to connect the foam-removed liquid outlet pipe with the non-rotating liquid container, wherein a separation assisting circular pipe is provided inside the inner rotating cylinder to cover the air bubbles outlet pipe, where the separation assisting circular pipe rotates together with the inner rotating cylinder, and a center of a circular cross-section of the separation assisting circular pipe is aligned on the cylindrical axis, and a separation disk member is provided on a top end of the separation assisting circular pipe, where the separation disk member is a disk member having a diameter larger than a perimeter of the separation assisting circular pipe, wherein separation assisting holes are formed in the separation assisting circular pipe where the separation assisting holes communicate an outer perimeter surface side of the separation assisting circular pipe and an internal perimeter surface side thereof.