Exhaust gas processing apparatus

Patent metadata

Field	Value
Publication number	US-9770690-B2
Application number	US-201514642509-A
Country	US
Kind code	B2
Filing date	Mar 9, 2015
Priority date	Dec 19, 2012
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

There is provided an exhaust gas processing apparatus which improves the removal rate of harmful substances and also achieves a compact size. An exhaust gas processing apparatus ( 10 ) absorbing gas by creating contact between gas and liquid includes: an absorbing tower main body ( 11 ) in which an internal space is formed; a spray apparatus ( 12 ) which sprays liquid in a prescribed region in an up/down direction of the internal space; and a gas supply apparatus ( 13 ) which introduces gas into the absorbing tower main body ( 11 ), wherein the spray apparatus ( 12 ) includes: a trunk pipe ( 12 b ) which extends in the up/down direction in the prescribed region of the internal space; branch pipes ( 12 c ) which are connected to the trunk pipe ( 12 b ) and extend towards the inner wall of the absorbing tower main body ( 11 ); and spray nozzles ( 12 d ) which spray liquid supplied from the branch pipes ( 12 c ), wherein the spray nozzles ( 12 d ) are installed such that an angle formed between the center line of the spraying region of the spray nozzle ( 12 d ), and the lengthwise direction of the branch pipe ( 12 c ) is an acute angle.

First claim

The invention claimed is:

1. An exhaust gas processing apparatus for removing substances from exhaust gas, the apparatus comprising:
an absorbing tower main body forming an internal space;
a spray apparatus, disposed on a central axis of the absorbing tower main body, for spraying liquid in a prescribed region within the internal space; and
a gas supply apparatus for introducing the gas into the absorbing tower main body at a position below the region where the spray apparatus is configured to spray the liquid, such that a gas rises up inside the absorbing tower main body while revolving, so as to follow a perimeter wall section of the absorbing tower main body,
the spray apparatus including:
a trunk pipe extending in at least one of the upward or downward directions in the internal space;
branch pipes coupled to the trunk pipe and extending towards an inner wall of the absorbing tower main body, the branch pipes communicating the liquid; and
spray nozzles receiving the liquid from the branch pipes and spraying the liquid so that the liquid makes contact with the gas to purify the gas,
the spray nozzles being inclined inwards and disposed such that an angle of installation formed between a center line of a spraying region of the spray nozzles and a longitudinal axis of the branch pipes is an acute angle.

2. The exhaust gas processing apparatus according to claim 1 , wherein the spray nozzles spray the liquid in a horizontal direction.

3. The exhaust gas processing apparatus according to claim 1 , wherein the angle is formed so that the trunk pipe is not included within the spraying region.

4. The exhaust gas processing apparatus according to claim 1 , wherein the angle is one half of a total spraying angle of the spray region of the spray nozzles.

5. The exhaust gas processing apparatus according to claim 1 , wherein
each of the branch pipes has a plurality of the spray nozzles disposed thereon, and
an angle of installation of at least one spray nozzle of the plurality of spray nozzles is an acute angle.

6. The exhaust gas processing apparatus according to claim 5 ,
wherein the spray nozzles include first and second spray nozzles on a same one branch pipe of the branch pipes, the first spray nozzle being on an outer side in a radial direction of the exhaust gas processing apparatus relative to the second nozzle,
wherein a first angle of installation of the first spray nozzle relative to the one branch pipe is smaller than a second angle of installation of the second spray nozzle relative to the one branch pipe,
the first angle of installation being formed between a center line of a first spraying region of the first spray nozzle, and a longitudinal axis of one the branch pipe,
the second angle of installation being formed between a center line of a second spraying region of the second spray nozzle, and the longitudinal axis of the one branch pipe.

7. The exhaust gas processing apparatus according to claim 1 , wherein
each of the branch pipes has a plurality of the spray nozzles disposed thereupon, and angles of installation of the spray nozzles with respect to the branch pipes are respectively different,
the angles of installation being formed between center lines of spraying regions of said plurality of spray nozzles, and longitudinal axes of the branch pipes.

8. The exhaust gas processing apparatus according to claim 1 , wherein the spray nozzles spray upwards or downwards.

9. The exhaust gas processing apparatus according to claim 1 , wherein the spray nozzles are hollow cone nozzles.

10. The exhaust gas processing apparatus according to claim 1 , wherein the spray nozzles each have
an inflow hole through which the liquid flows into the spray nozzle, and
a revolving flow chamber connected perpendicularly to the inflow hole so that an axis of the revolving flow chamber extends in a direction perpendicular to that of the inflow hole, the revolving flow chamber receiving the liquid from the inflow hole to cause the liquid to revolve in the revolving flow chamber, and the revolving flow chamber spraying the liquid.

11. The exhaust gas processing apparatus according to claim 1 , wherein
the gas supply apparatus is disposed so as to introduce the gas into the absorbing tower main body from a position below the region where the spray apparatus sprays the liquid, and
the gas rises up through an interior of the absorbing tower main body while revolving so as to follow a surface of the inner wall of the absorbing tower main body.

12. The exhaust gas processing apparatus according to claim 11 , wherein a spraying direction of the spray nozzles is inclined towards a central axis of rotation of the gas.

13. The exhaust gas processing apparatus according to claim 12 , wherein the absorbing tower main body further comprises
a liquid return member which is disposed in a position above the region where the spray apparatus sprays the liquid,
the liquid return member projecting in a ring shape from the surface of the inner wall of the absorbing tower main body towards a central axis of the absorbing tower main body, and
a front end of the liquid return member on a central axis side is bent at least downwards.

14. The exhaust gas processing apparatus according to claim 13 , wherein the liquid return member includes:
a liquid reservoir wall which projects to an upper side so as to form a liquid reservoir section; and
a through hole which allows liquid collected in the liquid reservoir section to drop.

15. An exhaust gas processing apparatus for removing substances from the gas, the apparatus comprising:
an absorbing tower main body forming an internal space;
a spray apparatus, disposed on a central axis of the absorbing tower main body, for spraying liquid in a prescribed region within the internal space; and
a gas supply apparatus for introducing the gas into the absorbing tower main body at a position below the region where the spray apparatus is configured to spray the liquid, such that a gas rises up inside the absorbing tower main body while revolving, so as to follow a perimeter wall section of the absorbing tower main body,
the spray apparatus including:
a trunk pipe extending in at least one of the upward or downward directions in the internal space;
branch pipes coupled to the trunk pipe and extending towards an inner wall of the absorbing tower main body, the branch pipes communicating the liquid; and
spray nozzles receiving the liquid from the branch pipes and spraying the liquid so that the liquid makes contact with the gas to purify the gas,
the spray nozzles being inclined inwards and disposed so as to be inclined further toward an inner side than a plane which is perpendicular to a lengthwise direction of the branch pipe.

16. The exhaust gas processing apparatus according to claim 15 , wherein the plane is positioned further towards the inner wall than the spray nozzles.

17. An exhaust gas processing apparatus for removing substances from the gas, the apparatus comprising:
an absorbing tower main body forming an internal space;
a spray apparatus, disposed on a central axis of the absorbing tower main body, spraying liquid in a prescribed region within the internal space; and
a gas supply apparatus for introducing the gas into the absorbing tower main body at a position below the region where the spray apparatus is configured to spray the liquid, such that a gas rises up inside the absorbing tower main body while revolving, so as to follow a perimeter wall section of the absorbing tower main body,
the spray apparatus including:

Assignees

• Fuji Electric Co Ltd

Inventors

• Takahashi Kuniyuki
• Komatsu Tadashi

Classifications

• B05B1/341

  before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet · CPC title

• B01D2247/101

  using a cyclone · CPC title

• B01D2252/1035

  Sea water · CPC title

• B01D2257/302

  Sulfur oxides · CPC title

• F01N2570/04

  Sulfur or sulfur oxides · CPC title