Method for generating energy, in which an electropositive metal is atomized and/or sprayed and combusted with a reaction gas, and a device for carrying out said method

Patent metadata

Field	Value
Publication number	US-10280805-B2
Application number	US-201515511270-A
Country	US
Kind code	B2
Filing date	Sep 11, 2015
Priority date	Sep 24, 2014
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

The present disclosure relates to a method of generating energy. The teachings thereof may be embodied in a method comprising: atomizing an electropositive metal; combusting the metal with a reaction gas; mixing the resulting combustion products with water, or an aqueous solution, or a suspension of a salt of the metal; separating a resulting mixture into (a) solid and liquid constituents and (b) gaseous constituents; at least partly converting energy from the separated constituents. Mixing the combustion products may include: atomizing liquid or gaseous water; or atomizing or nebulizing an aqueous solution or a suspension of a salt of the electropositive metal, into the reacted mixture.

First claim

The invention claimed is:

1. A method of generating energy, the method comprising:
atomizing or nebulizing an electropositive metal into a first reactor, the electropositive metal selected from the group consisting of: alkali metals, alkaline earth metals, aluminum, zinc;
feeding a reaction gas into the first reactor, the reaction gas comprising carbon dioxide or water;
combusting the reaction gas and the atomized or nebulized electropositive metal in the first reactor;
feeding resulting combustion products into a second reactor;
atomizing or nebulizing water, or an aqueous solution, or a suspension of a salt of the electropositive metal into the second reactor;
separating a mixture from the second reactor into (a) solid and liquid constituents and (b) gaseous constituents;
converting energy from the solid and liquid constituents; and
converting energy from the gaseous constituents.

2. The method as claimed in claim 1 , wherein separating the resulting mixture includes using a cyclone, filter plates, or electrostatic filters.

3. The method as claimed in claim 1 , wherein at least partially converting the energy from the solid and liquid constituents includes using at least one heat exchanger.

4. The method as claimed in claim 1 , wherein the at least partially converting energy from the gaseous constituents to electrical energy includes using at least one turbine and at least one generator.

5. The method as claimed in claim 1 , further comprising combusting electropositive metal with an excess of carbon dioxide and/or water.

6. The method as claimed in claim 5 , further comprising separating excess carbon dioxide or excess water from the gaseous constituents after the combustion and recycling the excess to the combustion process.

7. An apparatus for generating energy, the apparatus comprising:
a first reactor for reacting an electropositive metal with a reaction gas, the electropositive metal selected from the group consisting of: alkali metals, alkaline earth metals, aluminum, zinc, mixtures, and/or alloys thereof; the reaction gas comprises carbon dioxide or water;
at least one first atomization unit or nebulization unit for atomizing or nebulizing the electropositive metal into the first reactor;
at least one first feed unit to feed the electropositive metal to the at least one first atomization unit or nebulization unit;
at least one second feed unit to feed the first reactor with the reaction gas;
a second reactor to mix a resulting mixture of reaction gas and electropositive metal with water, or an aqueous solution, or a suspension of a salt of the electropositive metal;
at least one second atomization unit or nebulization unit to atomize or nebulize the water, or the aqueous solution, or the suspension of a salt of the electropositive metal into the second reactor;
at least one third feed unit to feed the at least one second atomization unit or nebulization unit with the water, or the aqueous solution, or the suspension of a salt of the electropositive metal;
a first separation unit to separate the mixture from the second reactor into (a) solid and liquid constituents and (b) gaseous constituents;
at least one first unit to at least partly convert the energy from the solid and liquid constituents; and
at least one second unit to at least partly convert the energy from the gaseous constituents.

8. The apparatus as claimed in claim 7 , further comprising a second separation unit to separate water or carbon dioxide from the gaseous constituents.

9. The apparatus as claimed in claim 7 , wherein the first separation unit comprises a cyclone, or at least one filter plate, or at least one electrostatic filter.

10. The apparatus as claimed in claim 7 , wherein the at least one first unit comprises at least one heat exchanger.

11. The apparatus as claimed in claim 7 , wherein the at least one second unit includes at least one turbine and at least one generator for generation of electrical energy.

12. The apparatus as claimed in claim 8 , further comprising a recycle unit to feed the water or carbon dioxide from the second separation unit to the second feed unit for reaction gas or to the first reactor.

13. The apparatus as claimed in claim 7 , further comprising a return line, a return valve, and at least one fourth feed unit for byproducts including water or H 2 or carbon dioxide or CO;
wherein the byproducts are at least partly removed from the gaseous constituents via the return valve, are recycled via the return line, and are fed via the at least one fourth feed unit to the first reactor or to the at least one second feed unit or to the second reactor or to the at least one second atomization unit or nebulization unit or to the at least one third feed unit.

14. The apparatus as claimed in claim 7 , further comprising at least one CO 2 scrubber.

15. The apparatus as claimed in claim 7 , further comprising at least one fifth feed unit for CO or H 2 or H 2 O.

16. The apparatus as claimed in claim 7 , further comprising at least one drier.

17. The apparatus as claimed in claim 7 , further comprising a Fischer-Tropsch synthesis apparatus.

Assignees

• Siemens Ag

Inventors

• Eckert Helmut
• Schmid Guenter
• Taroata Dan

Classifications

• F01K21/04

  using mixtures of steam and gas; Plants generating or heating steam by bringing water or steam into direct contact with hot gas ({F01K25/005, F02B47/02 take precedence; injecting water or steam into a as gas turbine plant F02C3/305}; direct-contact steam generators in general F22B) · CPC title

• F23J15/022

  for removing solid particulate material from the gasflow · CPC title

• F23J2217/40

  by cyclones · CPC title

• F23B2900/00003

  Combustion devices specially adapted for burning metal fuels, e.g. Al or Mg · CPC title

• F01K3/188 Primary

  using heat from a specified chemical reaction · CPC title