Hydrogen-powered desalination plant

Patent metadata

Field	Value
Publication number	US-9790103-B2
Application number	US-201414285450-A
Country	US
Kind code	B2
Filing date	May 22, 2014
Priority date	May 22, 2014
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

The hydrogen-powered desalination plant is a multi-stage flash desalination system using hydrogen fuel to power the top brine heater of the plant. The hydrogen-powered desalination plant includes a plurality of flash distillation stages, which each include a flash chamber and a condenser. The top brine heater in the hydrogen-powered desalination plant is powered by the carbon-free combustion of hydrogen gas with oxygen gas. The combustion of the hydrogen gas with the oxygen gas creates a flame, which is used directly to generate steam from atomized seawater, any seawater not converted to steam being collected as preheated brine and passed to the multi-stage flash desalination system for successive stages of flash distillation. Preferably, the flame is generated as a vortex.

First claim

I claim:

1. A desalination plant for producing fresh water from a supply of seawater, the desalination plant comprising:
a plurality of flash distillation stages;
each one of the plurality of flash distillation stages includes:
a flash chamber for flashing brine; and
a feed heater and condenser, the feed heater and condenser having at least one conduit having an inlet and an outlet, and
a collector and pipe system for collecting fresh water from the feed heater and condenser, and piping the fresh water out of the flash distillation stage;
wherein the at least one conduit successively passes through each one of the plurality of flash chambers; the desalination plant further comprising:
a first pump connected to the at least one conduit for feeding brine under pressure through each one of the feed heater and condensers;
a second pump connected to the collector and pipe system for removing the fresh water from the plurality of flash distillation stages;
a top brine heater having:
a housing having a cylindrical combustion chamber and a pool disposed below the combustion chamber to collect preheated brine;
an inlet connected to the outlet of the feed heater and condenser of a first one of the flash distillation stages, the inlet extending into the combustion chamber;
a plurality of sprinkler nozzles disposed in the combustion chamber at the top brine heater inlet for atomizing the brine entering the combustion chamber;
a source of hydrogen gas;
a source of oxygen gas; and
a metered conduit system extending between each of the sources of hydrogen and oxygen gases and the combustion chamber for introducing metered amounts of hydrogen and oxygen into the combustion chamber, wherein the metered conduit system includes a pair of hydrogen and oxygen entrance ports, each of the hydrogen and oxygen entrance ports enter the cylindrical combustion chamber tangentially from orthogonal directions thereby being radially opposed from one another and alternate with each other circumferentially about the cylindrical chamber, creating a helical vortex within the cylindrical chamber;
an igniter selectively introducing a flame into the combustion chamber to ignite the hydrogen and oxygen gases to convert the atomized brine into steam and preheated brine, the preheated brine collecting in the top brine heater, wherein the flame defines a helical vortex and is in direct contact with the atomized brine;
a steam conduit extending from the top brine heater through the flash chambers for heating seawater flowing through each one of the feed heater and condenser in the flash chambers;
a brine conduit extending from the top brine heater through the flash chambers for conveying the preheated brine through successive flash chambers for successive stages of evaporation and condensation, thereby producing desalinated water;
a desalination exit port extending from the second pump for removing the fresh water from all of the flash chambers; and
a brine exit port extending from the flash chambers for removing concentrated brine from the flash chambers.

2. The desalination plant for producing fresh water from a supply of seawater as recited in claim 1 , wherein the combustion chamber of the top brine heater defines a thermally insulated chamber.

3. The desalination plant for producing fresh water from a supply of seawater as recited in claim 1 , further comprising:
at least one collection tray positioned within each of the flash chambers; and
a pump for transferring the condensed water from the at least one collection tray to the desalination exit port.

Assignees

• Univ King Abdulaziz

Inventors

• Alhazmy Majed M

Classifications

• B01D1/16

  by spraying (B01D1/22 takes precedence) · CPC title

• C02F2103/08

  Seawater, e.g. for desalination · CPC title

• C02F1/06 Primary

  Flash evaporation · CPC title

• B01D3/065

  Multiple-effect flash distillation (more than two traps) · CPC title

• C02F1/14

  using solar energy · CPC title