US 5,514,267 A · Apparatus for dissolving a gas into and mixing the same with a liquid

Abstract

An apparatus for mixing a gas with a liquid and for dissolving the gas in the liquid comprises a throttled section (12) formed in a fluid flow passage, a gas inlet (18) provided slightly downstream of the throttled section (12), a widened section (16) which is continuous with the throttled section (12), a mixing section (20) provided downstream of the widened section (16), for mixing the gas introduced from the gas inlet (18) with the liquid in the fluid flow passage, and a nozzle section (24) provided on the outlet of the mixing section (20) for outputting the liquid with the gas dissolved therein. The gas is dissolved in the liquid in the mixing section by pressurizing the liquid in the mixing section. The apparatus is useful for dissolving ozone into a liquid, for dispersing bubbles in a liquid and for floating small particles in a liquid.

Claims22

Dependent claims

An apparatus for mixing a gas with a liquid and for dissolving the gas into the liquid under pressure, comprising:

a fluid flow passage;
a throttled section formed in said fluid flow passage;
a widened section having a gradually increased diameter and which is continuous with said throttled section;
a gas inlet provided in a portion of said widened section slightly downstream of said throttled section;
a mixing section having an outlet and provided downstream of said widened section, for mixing a gas introduced from said gas inlet with a liquid in said fluid flow passage, said mixing section dissolving gas, which has been mixed with the liquid, into the liquid by pressurizing the liquid, with the gas mixed therein, in said mixing section;
and
a nozzle section, having nozzle holes (22), provided on said outlet of said mixing section for outputting said liquid with said gas dissolved therein;
and
wherein each of said nozzle holes (22) is formed so as to jet bubbles dispersed in said liquid containing suspended particles, each of said nozzle holes (22) having a diameter of several micrometers to several hundred micrometers.

6 more elements

An apparatus for mixing a gas with a liquid and for dissolving the gas into the liquid under pressure, comprising:

a liquid supplying section (30) for supplying a liquid under a predetermined pressure and into which liquid a predetermined gas is to be dissolved;
a mixing unit (10) for mixing said gas with said liquid supplied under pressure from said liquid supplying section, said mixing unit (10) comprising;
a throttled section formed in a fluid flow passage,
a gas inlet provided slightly downstream of said throttled section;
a gradually widened section continuous with said throttled section;
a mixing section having an outlet and provided downstream of said widened section, for mixing said gas introduced from said gas inlet with said liquid in said fluid flow passage, said mixing section dissolving gas, which has been mixed with the liquid, into the liquid by pressurizing the liquid, with the gas mixed therein, in said mixing section, and
a nozzle section, having nozzle holes (22), provided on said outlet of said mixing section;
a gas supplying section (44) connected to said gas inlet of said mixing unit (10);
a liquid storing section (38) to which said nozzle section of said mixing unit (10) is connected and into which said liquid with said gas dissolved thereinto flows;
and
wherein said widened section has a cross sectional area (S.sub.A) at its connecting portion with said gas inlet which has a relation to the total cross sectional area (S.sub.B) of the nozzle holes (22), such that:
P.sub.A <P.sub.G
and
P.sub.A =(1-S.sup.2.sub.B /S.sup.2.sub.A)P.sub.1 +(.delta.P+P.sub.B)S.sup.2.sub.B /S.sup.2.sub.A
where
P.sub.1 is the total pressure in the widened section at its connecting portion to the gas inlet;
.delta. P is the pressure loss between the widened section at its connecting portion to the gas inlet and the nozzle holes;
P.sub.B is the static pressure at the outlets of the nozzle holes;
and
P.sub.G is the pressure of the gas flowing from the gas inlet.

17 more elements

An apparatus for mixing a gas with a liquid and for dissolving the gas into the liquid under pressure, comprising:

a first throttled section (120) formed by a portion of a fluid flow passage whose cross sectional area is reduced;
a widened section (122) continuous with said first throttled section (120) and formed by a gradually widening part of said fluid flow passage toward a downstream side thereof;
a gas inlet (123) provided in a portion of said widened section (122) slightly downstream of said first throttled section (120);
a mixing section (124) having a downstream end and provided downstream of said widened section (122), for mixing a gas introduced from said gas inlet (123) with a liquid in said fluid flow passage, said mixing section dissolving gas, which has been mixed with the liquid, into the liquid by pressurizing the liquid, with the gas mixed therein, in said mixing section;
a liquid pipe (113) having a distal end and a proximal end connected to said downstream end of said mixing section (124);
a nozzle section (115), having a plurality of nozzle holes (117),and connected to said distal end of said liquid pipe (113);
and
a second throttled section (130) formed by a portion of said fluid flow passage whose cross sectional area is reduced and which is provided just in front of said nozzle section (115);
and
wherein said widened section (122) has a cross sectional area (S.sub.A) at its connecting portion with said gas inlet (123) which has a relation to the total cross sectional area (S.sub.B) of the nozzle holes (117), such that:
P.sub.A <P.sub.G
and
P.sub.A =(1-S.sup.2.sub.B /S.sup.2.sub.A)P.sub.1 +(.delta.P+P.sub.B)S.sup.2.sub.B /S.sup.2.sub.A
where
P.sub.1 is the total pressure in the widened section at its connecting portion to the gas inlet;
.delta. P is the pressure loss between the widened section at its connecting portion to the gas inlet and the nozzle holes;
P.sub.B is the static pressure at the outlets of the nozzle holes;
and
P.sub.G is the pressure of the gas flowing from the gas inlet.

16 more elements

An apparatus for mixing a gas with a liquid and for dissolving the gas into the liquid under pressure, comprising

a first throttled section (120) formed by a portion of a fluid flow passage whose cross sectional area is reduced;
a widened section (122) continuous with said first throttled section (120) and formed by a gradually widened part of said fluid flow passage toward a downstream side of said fluid flow passage;
a gas inlet (123) provided in a portion of said widened section (122) slightly downstream of said first throttled section (120);
a mixing section (124) having a downstream end and provided downstream of said widened section (122), for mixing a gas introduced from said gas inlet (123) with a liquid in said fluid flow passage, said mixing section dissolving gas, which has been mixed with the liquid, into the liquid by pressurizing the liquid, with the gas mixed therein, in said mixing section;
a liquid pipe (134) having a branch portion (133) and connected to said downstream end of said mixing section (124);
nozzle sections (115) provided downstream of said branch section (133), and each of said nozzle sections (115) having a plurality of nozzle holes (117);
and
a second throttled section (130) formed by a portion of said fluid flow passage whose cross sectional area is reduced and provided just in front of said branch portion (133);
and
wherein said widened section has a cross sectional area (S.sub.A) at its connecting portion with said gas inlet which has a relation to the total cross sectional area (S.sub.B) of the nozzle holes, such that:
P.sub.A <P.sub.G
and
P.sub.A =(1-S.sup.2.sub.B /S.sup.2.sub.A)P.sub.1 +(.delta.P+P.sub.B)S.sup.2.sub.B /S.sup.2.sub.A
where
P.sub.1 is the total pressure in the widened section at its connecting portion to the gas inlet;
.delta. P is the pressure loss between the widened section at its connecting portion to the gas inlet and the nozzle holes;
P.sub.B is the static pressure at the outlets of the nozzle holes;
and
P.sub.G is the pressure of the gas flowing from the gas inlet.

16 more elements

An apparatus for mixing a gas with a liquid and for dissolving the gas into the liquid under pressure, comprising;

a throttled section (206) formed by throttling a portion of a fluid flow passage;
a widened section (210) formed by 2 gradually widening downstream portion of said fluid flow passage;
a gas inlet (208) provided slightly downstream of said throttled section (206), for introducing a gas into said fluid flow passage;
a mixing section (212) comprising a pressure-mixing flow passage (213) which has horizontal portions (213a) and vertical portions (213c) which connect adjacent horizontal portions (213a) together, said mixing section (212) being provided downstream of said widened section (210) said mixing section (212) defining a flow path for a gas (240) and a liquid (242) which are in contact with each other under pressure, for dissolving the gas, which has been mixed with the liquid, into the liquid by pressurizing the liquid, with the gas mixed therein, in said mixing section;
and
at least one nozzle hole (220) formed on said outlet or said downstream end of said pressure-mixing flow passage (213);
and
wherein said widened section has a cross sectional area (S.sub.A) at its connecting portion with said gas inlet which has a relation to the total cross sectional area (S.sub.B) of the at least one nozzle hole, such that:
P.sub.A <P.sub.G
and
P.sub.A =(1-S.sup.2.sub.B /S.sup.2.sub.A)P.sub.1 +(.delta.P+P.sub.B)S.sup.2.sub.B /S.sup.2.sub.A
where
P.sub.1 is the total pressure in the widened section at its connecting portion to the gas inlet;
.delta. P is the pressure loss between the widened section at its connecting portion to the gas inlet and the at least one nozzle hole;
P.sub.B is the static pressure at the outlets of the at least one nozzle hole;
and
P.sub.G is the pressure of the gas flowing from the gas inlet.

14 more elements

Dependencies are inferred from the claim text.

Apparatus for dissolving a gas into and mixing the same with a liquid

Life of this patent

Apparatus for dissolving a gas into and mixing the same with a liquid

Life of this patent

Abstract

Claims22