Combustion gas extraction probe and combustion gas treatment method

Patent metadata

Field	Value
Publication number	US-10066873-B2
Application number	US-57932704-A
Country	US
Kind code	B2
Filing date	Nov 16, 2004
Priority date	Nov 18, 2003
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

[Problems] A combustion gas extraction probe that is capable of preventing burnout of a head metal portion of a probe, capable of rapidly cooling a high-temperature gas in a uniform manner in a probe, and whose outer diameter can be kept small.
[Means for Solving Problems] A combustion gas extraction probe ( 4 ) having a hollow-cylindrical inner tube ( 4 a ) in which a high-temperature combustion gas flows, a hollow-cylindrical outer tube ( 4 b ) surrounding the inner tube ( 4 a ), a low-temperature gas discharge hole ( 4 c ) provided in the inner tube ( 4 a ), and a low-temperature gas supply means ( 9 ) for supplying a low-temperature gas between the inner tube ( 4 a ) and the outer tube ( 4 b ) and discharging the low-temperature gas from the discharge hole ( 4 c ) into the direction that is substantially perpendicular to the sucking direction of the high-temperature combustion gas and is toward the center of the flow of said high-temperature combustion gas. Alternatively, plural discharge holes ( 4 c ) may be provided, where the individual discharge holes ( 4 c ) are arranged at substantially the same positions from the head of the probe in the high-temperature combustion gas sucking direction, or alternatively, the discharge holes ( 4 c ) may be arranged in stages in the high-temperature combustion gas sucking direction. The flow speeds of the low-temperature gas and the high-temperature combustion gas are preferably not less than 40 m/s and not more than 100 m/s.

First claim

The invention claimed is:

1. A combustion gas extraction probe for extracting a high-temperature combustion gas while cooling said high-temperature combustion gas with a low-temperature gas characterized by:
an outer tube; and
a metal inner tube positioned within the outer tube to define a cooling fluid passage therebetween, the metal inner tube being of unitary construction and having an inner diameter defining a flow path area substantially along the entire tube and through which extracted high-temperature combustion gas flows, the metal inner tube configured to emit low-temperature gas into the flow path area only in a single transverse plane generally perpendicular to a sucking direction of the high-temperature combustion gas, the inner tube having a plurality of low-temperature discharge holes in direct fluid communication with the cooling fluid passage and the flow path area and spaced from a sucking end of the inner tube and disposed about respective axes aligned within a single plane for emitting said low-temperature gas so as to flow in a direction that is substantially perpendicular to the sucking direction of the high-temperature combustion gas and is toward a center of a flow of said high-temperature combustion gas such that said low-temperature gas reaches the centermost portion of said high-temperature combustion gas to create a single transverse sheet of low-temperature gas for mixed cooling and that all vector components of said low-temperature gas emitted into the high-temperature gas and parallel to the flow direction of said high-temperature gas are in a downstream direction of the high-temperature combustion gas; and
a plurality of collars coupled to the inner tube and disposed about respective ones of the plurality of low-temperature discharge holes, each collar being disposed about a respective axis which is perpendicular to the sucking direction of the high-temperature combustion gas;
the inner tube being independent of a discharge hole disposed about an axis spaced from the single plane and arranged perpendicular to the inner tube.

2. The combustion gas extraction probe as claimed in claim 1 comprising:
a low-temperature gas supply means for supplying the low-temperature gas between the inner tube and the outer tube, and discharging the low-temperature gas from the discharge hole into the inner tube;
the inner tube being connected to the outer tube such that all of the low-temperature gas flowing in the inner tube passes through the plurality of low-temperature gas discharge holes.

3. The combustion gas extraction probe as claimed in claim 2 , wherein individual discharge holes are rotationally symmetrically arranged at substantially the same positions from a head of the probe in the high-temperature combustion gas sucking direction.

4. The combustion gas extraction probe as claimed in claim 2 , wherein the outer tube defines a closed end.

5. The combustion gas extraction probe as claimed in claim 4 , wherein the inner tube defines an open end through which the high-temperature combustion gas enters the inner tube.

6. The combustion gas extraction probe as claimed in claim 5 , wherein the closed end of the outer tube circumnavigates the open end of the inner tube.

7. The combustion gas extraction probe as claimed in claim 2 , wherein:
the inner tube terminates to define an inner entrance end through which the high-temperature gas enters the inner tube, the inner entrance end defining an inner entrance plane; and
the inner and outer tubes are configured such that the low-temperature gas does not traverse the inner entrance plane.

8. The combustion gas extraction probe as claimed in one of claims 1 - 2 and 3 , wherein flow speeds of the low-temperature gas and the high-temperature combustion gas are not less than 40 m/s and not more than 100 m/s.

9. The combustion gas extraction probe as claimed in one of claims 1 and 3 , characterized by having a blaster injecting compressed air in an opposite direction to the sucking direction of the high-temperature combustion gas at a head of the probe.

10. The combustion gas extraction probe as claimed in claim 1 , wherein the low-temperature gas is emitted along at least two intersecting axes.

11. The combustion gas extraction probe as claimed in claim 10 , wherein the low-temperature gas is emitted along at least two perpendicular axes.

12. The combustion gas extraction probe as claimed in claim 1 , wherein the low-temperature gas is emitted into the high-temperature combustion gas to cool a peripheral portion of the high-temperature combustion gas as well as a central portion of the high-temperature combustion gas.

Assignees

• Saito Shinichiro
• Suzuki Takahiko
• Taiheiyo Cement Corp

Inventors

• Saito Shinichiro
• Suzuki Takahiko

Classifications

• Y10T137/0318

  Processes · CPC title

• F15D1/08

  of jets leaving an orifice · CPC title

• F27D17/001 Primary

  Mechanical Engineering · mapped topic

• F27B7/38

  Arrangements of cooling devices · CPC title

• Y10T137/8766

  With selectively operated flow control means · CPC title