公开(公告)号：US3707230A

公开(公告)日：1972-12-26

申请号：US3707230D

申请日：1970-08-20

Applicant: FMC CORP

Inventor： DAVIDSON ROGER

IPC: B01D33/04 ,  B01D33/073 ,  B01D35/20

CPC classification number: B01D33/04 ,  B01D33/073 ,  B01D33/50 ,  B01D33/54 ,  B01D33/68

Abstract: The removal of organic and other solids from a dilute aqueous suspension, such as the secondary effluent from a sewage treatment plant, is accomplished by passing the effluent through a rotating fabric in a chamber, which results in depositing solids on the fabric that serves as a filter. Located within the chamber and disposed immediately adjacent the filter are ultrasonic transducers that function to remove the solids from the filter by setting up vibrations. The solids so removed are directed through a solids discharge pipe positioned adjacent the transducers. The transducer can be located in a number of positions within the chamber outside the drum, such as (1) below the level of the contaminated stream, but above the level of the clarified liquid and (2) below the liquid level of the clarified stream, or inside the drum. In the latter two positions, clarified liquid may move outwardly to assist in carrying away the solids removed from the screen.

Abstract translation: 从稀释的水性悬浮液（例如来自污水处理厂的二次流出物）中除去有机和其它固体，通过将流出物通过室中的旋转织物来实现，这导致在织物上沉积固体，其作为 过滤。 位于室内并且紧邻过滤器的设置的超声换能器用于通过设置振动来从过滤器去除固体。 如此去除的固体被引导通过邻近换能器定位的固体排出管。 传感器可以位于鼓外部的室内的多个位置，例如（1）低于污染流的水平，但高于澄清液体的水平，和（2）在澄清流的液面以下 ，或鼓内。 在后两个位置，澄清的液体可以向外移动以帮助携带从屏幕移除的固体。

公开(公告)号：US3575850A

公开(公告)日：1971-04-20

申请号：US3575850D

申请日：1969-07-07

Applicant: FMC CORP

Inventor： DAVIDSON ROGER ,  SAKO FUMIO F ,  FISHER ROBERT A ,  PALMER WARREN G

IPC: B01D33/00 ,  C02F3/12 ,  C02F11/12 ,  C02C1/12

CPC classification number: C02F11/123 ,  B01D33/048 ,  B01D33/073 ,  B01D33/463 ,  C02F3/12 ,  Y02W10/15

Abstract: THE METHOD OF TREATING WASTE MATERIALS SUCH AS SEWAGE INVOLVES INTRODUCING RAW SEWAGE INTO A BODY OF AQUEOUS MEDIUM, AERATING SAID BODY OF AQUEOUS MEDIUM, WITHDRAWING A SUFFICIENT VOLUME OF SUBSTANTIALLY SOLIDS FREE LIQUID THROUGH A PERFORATE DRUM SUPPORTED FILTER WHICH IS PARTIALLY SUBMERGED IN SAID BODY OF AQUEOUS MEDIUM TO COMPENSATE FOR THE VOLUME OF INFLUENT WASTE MATERIAL AND THEREBY MAINTAIN A RELATIVELY CONSTANT FOR

SAID BODY OF AQUEOUS MEDIUM, ACCUMULATING SOLIDS ON THE MOVABLE FILTER OPERATING SO THAT IT FILTERS OUT SOLIDS WHILE PASSING THE SUBSTANTIALLY SOLIDS FREE LIQUID AND TRANSPORTING THE SOLIDS ACCUMULATED ON SAID SCREEN TO A POINT OF DISPOSAL WHERE THE SOLIDS ARE DISLODGED FROM THE SCREEN.

公开(公告)号：US3489679A

公开(公告)日：1970-01-13

申请号：US3489679D

申请日：1967-08-15

Applicant: FMC CORP

Inventor： DAVIDSON ROGER ,  PALMER WARREN G ,  FORREST TOM H

IPC: B01D21/00 ,  B01D29/09 ,  B01D33/048 ,  B01D35/20 ,  B01D36/04

CPC classification number: B01D21/283 ,  B01D21/00 ,  B01D21/0012 ,  B01D21/04 ,  B01D21/302 ,  B01D21/34 ,  B01D29/09 ,  B01D29/605 ,  B01D29/72 ,  B01D29/90 ,  B01D29/92 ,  B01D33/048 ,  B01D33/056 ,  B01D33/54 ,  B01D33/72 ,  B01D33/74 ,  B01D33/807 ,  B01D35/20 ,  B01D36/04

Abstract: Ultrasonic clarification of liquids... by means of an endless moving screen having openings smaller than at least some of the solids which travels through a tank between the inlet and outlet and into a zone containing a body of liquid separated from the aqueous solution, the tank being provided with an inlet for the suspension and an outlet for the clarified aqueous medium. The body of liquid is subjected to ultrasonic vibrations to impart loosening forces to the solids deposited on the screen, thereby dislodging them and suspending them in the zone. This causes the solids, which are still under the influence of the ultrasonic vibrations, to settle and concentrate in the liquid at the bottom of the zone. The screen is then moved, and the solids removed from aqueous suspension and in their concentrated solid state from the bottom of the zone. The bath has relatively small volume, so that after solids are deposited on the screen within the tank and are subsequently concentrated on the bottom, the clean portion of the screen is returned to the tank for further removal of solids.