# US 4,392,874 A · Degassifying and mixing apparatus for liquids

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- Number: US 4,392,874 A
- Document ID: US4392874A
- Status: Granted
- Kind: A
- Application number: 06/325,082
- Filed: 1981-11-25
- Granted: 1983-07-12
- Earliest claimed: 1981-11-25
- Assignees: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
- Inventors: Samuel T. Yamauchi
- Web page: https://patentgrep.com/patent/US4392874A

## CPC

- B01D 19/0047: {Atomizing, spraying, trickling}
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)

## Abstract

A liquid degassifier including a containment vessel (10), a liquid pump (16) and a header assembly (12) within the containment vessel (10) in a volume above the reservoir (11a) of liquid therein. The pump (16) draws from this reservoir and outputs to the header assembly, the latter being constructed to return the liquid to the reservoir in the form of a stacked plurality of vertically spaced, concentric, conical cascades (13a, 14a and 15a) via orifices (13, 14, and 15). A vacuum source (34) provides a partial vacuum in the containment vessel (10) to enhance the degassing process.

## Claims

### Claim 1

Liquid degassifying apparatus comprising: a vacuum tight vessel for containment of liquid to be subjected to continuous degassing operations, the level of said liquid within said vessel producing a first liquid volume therein, the remainder of the volume of said vessel comprising a second volume; a header assembly within said second volume, said header assembly including a stacked, spaced plurality of axially narrow orifices, each of said orifices extending generally circumferentially about the axis of said header assembly to produce a plurality of cascades of spaced generally concentric, conical, liquid films into said first volume and means for adjusting the thickness of the liquid films; a first means including a liquid input and manifold for said header assembly, said manifold being formed of a generally cylindrical body having a generally axial cavity therein, and a liquid passage connecting each of said orifices to said liquid manifold; a second means for circulating said liquid from said first volume to said header assembly liquid input; and a third means for partially evacuating said second volume.

### Claim 2 (depends on 1)

Apparatus according to claim 1 in which the liquid passages are progressively smaller from top to bottom.

### Claim 3 (depends on 2)

Apparatus according to claim 2 in which the opening of the orifices are adjustable.

### Claim 4 (depends on 3)

Apparatus according to claim 3 in which the cylindrical body has male threads on its outer surface and each orifice is defined by a pair of members having female threads engaging with the male threads whereby the thickness of each orifices may be adjusted.

### Claim 5 (depends on 4)

Apparatus according to claim 4 in which there is a smaller liquid passage below the orifice to form with the lower member of the bottom orifice a further conical spray.

### Claim 6 (depends on 1)

Apparatus according to claim 1 in which the opening of the orifices are adjustable.