Effluent gas inlet assembly for radiant burner

Patent metadata

Field	Value
Publication number	US-2018335209-A1
Application number	US-201515598499-A
Country	US
Kind code	A1
Filing date	May 18, 2017
Priority date	Dec 15, 2014
Publication date	Nov 22, 2018
Grant date	—

Abstract

An inlet assembly for a burner and a method are disclosed. The inlet assembly comprises: an inlet nozzle defining an inlet aperture coupleable with an inlet conduit providing an effluent gas stream for treatment by the burner, a non-circular outlet aperture, and a nozzle bore extending along a longitudinal axis between the inlet aperture and the outlet aperture for conveying the effluent gas stream from the inlet aperture to the outlet aperture for delivery to the combustion chamber of the burner, the nozzle bore having an inlet portion extending from the inlet aperture and an outlet portion extending to the non-circular outlet aperture. In this way, the non-circular outlet aperture provides a non-circular effluent gas stream flow into the combustion chamber. The non-circular effluent gas flow enables a greater volume of effluent gas stream to be introduced into the combustion chamber whilst still achieving or exceeding the required levels of abatement. This is because a non-circular effluent gas stream provides a reduced distance along which diffusion and reaction needs to occur compared to that of an equivalent circular effluent gas stream. Hence, an increased volume of effluent gas stream can be abated, compared to that of an equivalent circular effluent gas stream.

First claim

1 . An inlet assembly for a burner, said inlet assembly comprising:
(a) an inlet nozzle defining an inlet aperture coupleable with an inlet conduit providing an effluent gas stream for treatment by said burner; (b) a non-circular outlet aperture; and (c) a nozzle bore extending along a longitudinal axis between said inlet aperture and said outlet aperture for conveying said effluent gas stream from said inlet aperture to said outlet aperture for delivery to said combustion chamber of said burner, said nozzle bore having an inlet portion extending from said inlet aperture and an outlet portion extending to said non-circular outlet aperture.

2 . The inlet assembly of claim 1 , wherein a cross-sectional area of said inlet portion reduces along said longitudinal axis from said inlet aperture towards said outlet portion.

3 . The inlet assembly of claim 1 , wherein a cross-sectional shape of said inlet portion transitions along said longitudinal axis from a shape of said inlet aperture to a shape of said outlet aperture.

4 . The inlet assembly of claim 1 , wherein said inlet aperture is circular.

5 . The inlet assembly of claim 1 , wherein said outlet aperture is elongate.

6 . The inlet assembly of claim 1 , wherein said outlet aperture is a generally quadrilateral slot.

7 . The inlet assembly of claim 1 , wherein said outlet aperture is an obround.

8 . The inlet assembly of claim 1 , wherein said outlet aperture is formed from a plurality of co-located, discrete apertures.

9 . The inlet assembly of claim 1 , wherein a cross-sectional area of said outlet portion changes along said longitudinal axis from said outlet aperture towards said inlet portion.

10 . The inlet assembly of claim 1 , wherein said cross-sectional area of said outlet portion reduces along said longitudinal axis from said outlet aperture towards said inlet portion.

11 . The inlet assembly of claim 1 , comprising a baffle coupling said inlet portion with said outlet portion, said baffle defining a baffle aperture positioned within said nozzle bore, said baffle aperture having a reduced cross-sectional area compared to that of said outlet portion adjacent said baffle.

12 . The inlet assembly of claim 11 , wherein a cross-sectional area of said inlet portion reduces along said longitudinal axis from said inlet aperture towards said outlet portion to match said cross-sectional area of said baffle aperture.

13 . The inlet assembly of claim 11 , wherein a cross-sectional shape of said inlet portion transitions along said longitudinal axis from a shape of said inlet aperture to a shape of said baffle aperture.

14 . The inlet assembly of claim 11 , wherein a shape of said baffle aperture matches that of said outlet portion adjacent said baffle.

15 . The inlet assembly of claim 11 , wherein said baffle aperture is formed from a plurality of co-located apertures.

16 . The inlet assembly of claim 11 , wherein said baffle is configured to provide said baffle aperture having a changeable cross-sectional area.

17 . The inlet assembly of claim 11 , wherein said baffle comprises a shutter operable to provide said changeable cross-sectional area.

18 . The inlet assembly of claim 17 , wherein said shutter is biased to provide said changeable cross-sectional area which varies in response a velocity of said effluent gas stream.

19 . A method, comprising:
(a) providing an inlet assembly for a burner, said inlet assembly comprising an inlet nozzle defining an inlet aperture coupleable with an inlet conduit providing an effluent gas stream for treatment by said burner, a non-circular outlet aperture, and a nozzle bore extending along a longitudinal axis between said inlet aperture and said outlet aperture for conveying said effluent gas stream from said inlet aperture to said outlet aperture for delivery to said combustion chamber of said burner, said nozzle bore having an inlet portion extending from said inlet aperture and an outlet portion extending to said non-circular outlet aperture; and (b) supplying said effluent stream to said inlet aperture.

20 . The method of claim 19 , wherein said inlet assembly comprises a baffle coupling said inlet portion with said outlet portion, said baffle defining a baffle aperture having a changeable cross-sectional area positioned within said nozzle bore, said baffle aperture having a reduced cross-sectional area compared to that of said outlet portion adjacent said baffle and said method further comprises:
varying said changeable cross-sectional area in response a velocity of said effluent gas stream.

Assignees

• Edwards Ltd

Inventors

• Seeley Andrew James
• Price Duncan Michael

Classifications

• F23D14/70

  Baffles or like flow-disturbing devices · CPC title

• F23G7/065 Primary

  using gaseous or liquid fuel · CPC title

• F23D2205/00

  Assemblies of two or more burners, irrespective of fuel type · CPC title

• F23D14/583 Primary

  of elongated shape, e.g. slits · CPC title

• F23G2209/142

  Halogen gases, e.g. silane · CPC title