Method of simultaneous removal of NO and carbon particles and inorganic dust from flue gases and catalytic reactor for removal of NO and carbon particles and inorganic dust from flue gases

Patent metadata

Field	Value
Publication number	US-10967328-B2
Application number	US-201214363807-A
Country	US
Kind code	B2
Filing date	Dec 10, 2012
Priority date	Dec 8, 2011
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

A method for simultaneous removal of NO and carbonic particles and inorganic dust from flue gases in a reactor with a catalyst for direct decomposition of nitric oxide located on a metallic monolith, includes tangential introduction of flue gases to the reactor circumference. Flue gases flow rotationally and downwards in the reactor in contact with an undulating surface of metallic foil located on an inner wall of the reactor chamber and in contact with the catalyst on a spiral band falling to the lower part of the reactor, and next flue gases jet direction counter-currently to a cylindrical inner chamber containing slices of the monolithic catalyst disturbing laminar flow of the flue gases jet. The reactor arrangement provides for simultaneous removal of NO and carbon particles and inorganic dust from flue gases.

First claim

The invention claimed is:

1. A method comprising:
a) receiving flue gasses into a reactor including a body,
wherein the body includes a heated annular inner wall with an undulating inner wall surface,
and wherein the received flue gases are directed to move rotationally within the body by the inner wall,

b) directing the rotationally moving flue gasses downwardly within the body by engagement with a spiral band coated with a catalyst operative to directly remove NO from the gasses,
c) enabling the gas that has been directed downwardly by the band to pass upwardly through a cylindrical heated chamber within the body to a flue gas outlet from the body,
wherein the chamber includes a plurality of slices including the catalyst,

whereby NO, carbonic particles and inorganic dust are removed from the gas by the reactor.

2. The method of claim 1 , wherein in the chamber the plurality of slices extend parallel to one another and at least one directing spacer is positioned intermediate of the at least some of the plurality of slices,
wherein in (c) the at least one directing spacer disturbs laminar flow of the flue gases through the chamber.

3. The method of claim 1 wherein within the chamber, a directing spacer is positioned intermediate of at least two of the plurality of slices,
wherein the plurality of slices are arranged nonparallel to one another,
wherein in (c) the directing spacer is operative to disturb the laminar flow of the flue gases through the plurality of slices.

4. The method of claim 1 , wherein
the plurality of slices have various shapes and dimensions,
and wherein in (c) the gas passes through slices having various shapes and dimensions.

5. The method of claim 1 , wherein in (a), the flue gases inside the reactor body are in the range of 150° C.-450° C.

6. The method of claim 1 , wherein in at least one of (b) and (c), simultaneous removal of NO and total oxidation of carbonic particles contained in dust transported by the flue gasses occurs.

7. The method of claim 1 , wherein in (a) the flue gasses are received in the reactor from a stationary emission source.

8. Apparatus comprising:
a reactor configured for removal of NO, carbonic particles and inorganic dust from flue gases including:
a reactor body configured to extend along a vertical axis,
wherein the reactor body includes a portion having a cylindrical shape,
the portion including
an annular inner wall,
 wherein the inner wall includes an undulating inner surface,
an annular outer wall,
heat resistant material extending intermediate of the inner wall and the outer wall,
an upper part,
a closed lower end,

an inner wall heater configured to heat the inner wall,
a cylindrical chamber, wherein the chamber is concentric with and disposed radially inward from the inner wall,
a chamber heater configured to heat the chamber,
a spiral band,
wherein the spiral band
is disposed radially intermediate of the inner wall and the chamber,
is configured to direct gas toward the lower end,
is coated with a catalyst operative to directly remove NO,

wherein the chamber includes a chamber interior,
wherein a plurality of slices including the catalyst extend in the chamber interior,
wherein the slices are configured to enable axial flow of gas in the chamber interior,

a flue gas inlet,
wherein the flue gas inlet is configured to enable flue gas to enter the reactor body adjacent to the upper part between the inner wall and the chamber, and radially offset from the axis,

a gas outlet,
wherein the gas outlet is configured to enable gas to exit from the chamber interior,

whereby flue gas entering the reactor from the gas inlet is caused to flow within the body with exposure to the catalyst, annularly and downwardly outside the chamber and then axially upward through the chamber interior to the gas outlet.

9. The apparatus of claim 8 , wherein the chamber is bounded by a cylindrical wall, wherein the wall includes a chamber inner surface,
wherein the chamber inner surface is coated with the catalyst.

10. The apparatus of claim 8 , wherein within the chamber interior the slices are configured parallel to one another and perpendicular to the vertical axis.

11. The apparatus of claim 8 , and further including
a directing spacer,
wherein the directing spacer is intermediate of at least two of the slices,

whereby the directing spacer is operative to disturb laminar flow of the flue gases through the chamber interior.

12. The apparatus of claim 11 , and further including a plurality of directing spacers wherein each directing spacer extends intermediate of respective immediately adjacent slices.

13. The apparatus of claim 12 , wherein each directing spacer is configured to cause rotational flow of the flue gases.

14. The apparatus of claim 13 , wherein each directing spacer includes a propeller shape.

15. The apparatus of claim 8 , and further comprising an axial heater, wherein the axial heater extends within the chamber interior and along the vertical axis.

16. The apparatus of claim 8 wherein the chamber includes a chamber inlet to the chamber interior, and further includes a directing spacer,
wherein the directing spacer is configured to disturb laminar flow of flue gasses,
wherein flue gasses are caused to flow through the directing spacer before entering the chamber inlet.

17. The apparatus of claim 8 , wherein the plurality of slices includes respective adjacent pairs of slices, wherein the slices of a respective pair extend at different angles relative to the vertical axis such that the slices of the pair are closer to each other along a direction transverse of the vertical axis.

18. The apparatus of claim 8 , wherein the cylindrical chamber touches the undulating inner surface.

19. The apparatus of claim 8 , wherein the reactor body includes a conical shaped portion below the portion having the cylindrical shape.

20. The apparatus of claim 8 , wherein simultaneously within the reactor, NO is removed from the flue gases, carbonic particles contained in dust transported by flue gases is oxidized and inorganic dust from flue gases is removed.

Assignees

• Univ Jagiellonski

Inventors

• Najbar Mieczyslawa
• Lech Ryszard
• Danielewski Marek
• Budzioch Janusz

Classifications

• B04C5/04

  Tangential inlets · CPC title

• B01D53/8631 Primary

  Processes characterised by a specific device · CPC title

• B01D53/40

  Acidic components (B01D53/44 takes precedence) · CPC title

• B01D2255/405

  Spinels · CPC title

• B01D53/82

  with stationary reactants · CPC title