US 10,851,000 B2Granted

Systems for producing high-concentration of dissolved ozone in liquid media

AssigneesL'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude, American Air Liquide, Inc.

InventorsJan Mante, Vasuhi Rasanayagam, Midhun Joy, Rovshan Mahmudov, Siavash Isazadeh

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Abstract

Disclosed are systems for continuous production of ozone strong water, the systems comprising an injection device that injects an acidification agent into a pressurized feed liquid, a diffuser device that injects ozone into a body of the acidic pressurized feed water, and injection nozzles each controlled by a valve that adjust a flow rate of the ozone strong water discharged from a dissolution column to match a flow rate of the acidic pressurized feed water fed to the dissolution column, thereby maintaining a start-up mode in an upper portion of the dissolution column that favors a high efficiency of ozone mass transfer and a steady-state mode in a lower portion of the dissolution column that favors a high dissolved ozone concentration coexistent in the body of the acidic pressurized liquid, wherein a concentration gradient of dissolved ozone is formed along a height of the body of the acidic pressurized liquid.

Claims31

Dependent claims

A system for continuous production of a gas-free liquid containing ozone, the system comprising:

a) a first gas injection device configured and adapted to inject an acidification agent into a pressurized feed liquid stream to maintain a pH value of the pressurized feed liquid stream below 7;
b) a dissolution column including:
(i) a pressure vessel, configured and adapted to contain a body of acidic pressurized liquid and an off gas in a headspace above the body of the acidic pressurized liquid;
(ii) an inlet, configured and adapted to permit passage of an acidic pressurized feed liquid stream, after the injection of the acidification agent, into the pressure vessel through the headspace;
(iii) an off-gas vent, configured and adapted to release the off gas contained in the headspace of the pressure vessel so as to maintain a pressure of the pressure vessel within a pre-determined pressure range;
and
(iv) an outlet, configured and adapted to discharge the gas-free liquid containing ozone from the pressure vessel;
c) a fluid recirculation loop having
a fluid inlet, fluidly connected to the dissolution column, configured and adapted to receive a fluid from the dissolution column;
a second gas injection device, configured and adapted to inject ozone into the fluid being recirculated by the fluid recirculation loop;
and
a fluid injection device, within the pressure vessel, mounted on the bottom of the pressure vessel, configured and adapted to diffuse the fluid, after the injection of ozone, into the body of the acidic pressurized liquid in the pressure vessel, thereby injecting ozone therein;
d) a controller, configured and adapted to adjust a flow rate of the acidic pressurized feed liquid stream fed to the inlet of dissolution column so as to yield an inflow of the acidic pressurized feed liquid stream that enables to continuously produce the gas-free liquid containing ozone;
and
e) at least one injection nozzles each controlled by a valve, fluidly connected to the outlet of the dissolution column, configured and adapted to adjust a flow rate of the produced gas-free liquid containing ozone discharged from the outlet of the dissolution column to match the flow rate of the acidic pressurized feed liquid stream fed to the inlet of the dissolution column so as to maintain a start-up mode in an upper portion of the pressure vessel that favors a high efficiency of ozone mass transfer into the acidic pressurized liquid and a steady-state mode in a lower portion of the pressure vessel that favors a high dissolved ozone concentration in the acidic pressurized liquid coexistent in the body of the acidic pressurized liquid in the pressure vessel,
wherein a concentration gradient of dissolved ozone is formed along a height of the body of the acidic pressurized liquid.

13 more elements

A system for continuous production of an ozone strong water, the system comprising:

a) a first gas injection device configured and adapted to inject an acidification agent into a pressurized feed water stream to maintain a pH value of the pressurized feed water stream below 7;
b) a dissolution column including:
(i) a pressure vessel, configured and adapted to contain a body of acidic pressurized water and an off gas in a headspace above the body of the acidic pressurized water;
(ii) an inlet, configured and adapted to permit passage of an acidic pressurized feed water stream, after the injection of the acidification agent, into the pressure vessel through the headspace;
(iii) an off-gas vent, configured and adapted to release the off gas contained in the headspace of the pressure vessel so as to maintain a pressure of the pressure vessel within a pre-determined pressure range;
and
(iv) an outlet, configured and adapted to discharge the ozone strong water from the pressure vessel;
c) a fluid recirculation loop having
a fluid inlet, fluidly connected to the dissolution column, configured and adapted to receive a fluid from the dissolution column;
a second gas injection device, configured and adapted to inject ozone into the fluid being recirculated by the fluid recirculation loop;
and
a fluid injection device, within the pressure vessel, mounted on the bottom of the pressure vessel, configured and adapted to diffuse the fluid, after the injection of ozone, into the body of the acidic pressurized water in the pressure vessel, thereby injecting ozone therein;
d) a controller, configured and adapted to adjust a flow rate of the acidic pressurized feed water stream fed to the inlet of dissolution column so as to yield an inflow of the acidic pressurized feed water stream that enables to continuously produce the ozone strong water;
and
e) at least one injection nozzles each controlled by a valve, fluidly connected to the outlet of the dissolution column, configured and adapted to adjust a flow rate of the produced ozone strong water discharged from the outlet of the dissolution column to match the flow rate of the acidic pressurized feed water stream fed to the inlet of the dissolution column so as to maintain a start-up mode in an upper portion of the pressure vessel that favors a high efficiency of ozone mass transfer into the acidic pressurized water and a steady-state mode in a lower portion of the pressure vessel that favors a high dissolved ozone concentration in the acidic pressurized water coexistent in the body of the acidic pressurized water in the pressure vessel,
wherein a concentration gradient of dissolved ozone is formed along a height of the body of the acidic pressurized water.

13 more elements

A system for continuous production of a gas-free oxidant for liquid oxidation processes, the system comprising:

a) a gas injection device configured and adapted to inject an acidification agent into a pressurized feed liquid stream to maintain a pH value of the pressurized feed liquid stream below 7;
b) a dissolution column including:
(i) a pressure vessel, configured and adapted to contain a body of acidic pressurized liquid and an off gas in a headspace above the body of the acidic pressurized liquid;
(ii) an inlet, configured and adapted to permit passage of an acidic pressurized feed liquid stream, after the injection of the acidification agent, into the pressure vessel through the headspace;
(iii) a fluid diffuser device within the pressure vessel, mounted on the bottom of the pressure vessel, configured and adapted to diffuse an oxidant gas into the body of the acidic pressurized liquid in the pressure vessel to dissolve the oxidant gas therein, thereby producing the gas-free oxidant for liquid oxidation processes;
and
(iv) an off-gas vent, configured and adapted to release the off gas contained in the headspace of the pressure vessel so as to maintain a pressure of the pressure vessel within a pre-determined pressure range;
and
(iv) an outlet, configured and adapted to discharge the gas-free oxidant for liquid oxidation processes from the pressure vessel;
c) a controller, configured and adapted to adjust a flow rate of the acidic pressurized feed liquid stream fed to the inlet of dissolution column so as to yield an inflow of the acidic pressurized feed liquid stream that enables to continuously produce the gas-free oxidant for liquid oxidation processes;
and
e) at least one injection nozzles each controlled by a valve, fluidly connected to the outlet of the dissolution column, configured and adapted to adjust a flow rate of the produced gas-free oxidant for liquid oxidation processes discharged from the outlet of the dissolution column to match the flow rate of the acidic pressurized feed liquid stream fed to the inlet of the dissolution column so as to maintain a start-up mode in an upper portion of the pressure vessel that favors a high efficiency of ozone mass transfer into the acidic pressurized liquid and a steady-state mode in a lower portion of the pressure vessel that favors a high dissolved ozone concentration in the acidic pressurized liquid coexistent in the body of the acidic pressurized liquid in the pressure vessel,
wherein a concentration gradient of dissolved ozone is formed along a height of the body of the acidic pressurized liquid.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/046,805Filed 26 Jul 2018 · continuation in part
Priority: 28 Mar 2018
Published: US 2019/0300405 A13 Oct 2019
Granted: 1 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification30 codes

C02F 1/78
By oxidation: with ozone
A01N 59/00
Biocides, pest repellants or attractants, or plant growth regulators containing elements or
A61L 2/183
Liquid substances: ozone dissolved in a liquid
B01F 23/2322
Using flow-mixing means for introducing the gases, e.g. baffles: using columns, e.g. multi-staged columns