Burner with combustion air driven jet pump

Patent metadata

Field	Value
Publication number	US-2016370002-A1
Application number	US-201514741219-A
Country	US
Kind code	A1
Filing date	Jun 16, 2015
Priority date	Jun 16, 2015
Publication date	Dec 22, 2016
Grant date	—

Abstract

Devices, methods, and systems for utilizing a burner with a combustion air driven jet pump are described herein. One burner apparatus includes a jet pump located inside a burner housing, the jet pump having a combustion air inlet that receives combustion air, a chamber to receive the combustion air from the combustion air inlet, and a tapered portion of the chamber that tapers to an outlet having a smaller diameter than the diameter of the inlet.

First claim

What is claimed:

1 . A burner apparatus, comprising:
a jet pump located inside a burner housing, the jet pump having a combustion air inlet that receives combustion air, a chamber to receive the combustion air from the combustion air inlet, and a tapered portion of the chamber that tapers to an outlet having a smaller diameter than the diameter of the inlet.

2 . The apparatus of claim 1 , wherein at least the jet pump outlet is positioned within a jet pump bell.

3 . The apparatus of claim 2 , wherein negative pressure, within the jet pump bell, generated from the jet pump can be used to pull flue gas from at least one of an exhaust stack or fired chamber.

4 . The apparatus of claim 2 , wherein further negative pressure is generated by a number of fuel inlets that direct fuel into the apparatus downstream from the jet pump bell.

5 . The apparatus of claim 4 , wherein the flue gas is educted and mixed with the combustion air to provide a combustion air-flue gas mixture.

6 . The apparatus of claim 5 , wherein the combustion air-flue gas mixture passes into a burner throat where it is mixed with fuel to provide a flame at a burner outlet.

7 . The apparatus of claim 1 , wherein the jet pump bell includes a tapered portion that tapers to an outlet having a smaller diameter than a maximum diameter of the jet pump bell.

8 . A burner apparatus, comprising:
a jet pump located inside a burner housing, the jet pump having a combustion air inlet that receives combustion air, a chamber to receive the combustion air from the combustion air inlet, and a tapered portion of the chamber that tapers to an outlet having a smaller diameter than the diameter of the inlet; and a jet pump bell having a chamber to receive the combustion air from the jet pump and flue gas from a flue gas inlet, wherein the combustion air and flue gas mix to form a combustion air-flue gas mixture.

9 . The apparatus of claim 8 , wherein a burner throat located downstream from the jet pump bell includes a number of fuel inlets provided downstream from the jet pump bell, but on an upstream portion of the burner throat.

10 . The apparatus of claim 9 , wherein a burner throat located downstream from the jet pump bell includes a plurality of fuel inlets arranged around the circumference of the burner throat.

11 . The apparatus of claim 10 , wherein the inlets are arranged generally uniformly spaced from each other.

12 . The apparatus of claim 8 , wherein a burner throat located downstream from the jet pump bell includes a number of fuel inlets provided downstream from the jet pump bell.

13 . The apparatus of claim 12 , wherein the fuel inlets provide fuel gas pressure and fuel velocity, when fuel is injected by the fuel inlets, which supplements negative pressure created by the jet pump that is present within the burner throat.

14 . A burner apparatus, comprising:
a jet pump bell located inside a burner housing, the jet pump bell having a chamber therein for receiving combustion air and flue gas; a jet pump, located within the jet pump bell, having a combustion air inlet that receives combustion air from a combustion air fan, a chamber to receive the combustion air, and a tapered portion that tapers to an outlet having a smaller diameter than the diameter of the inlet; and wherein the combustion air exiting the jet pump creates a negative pressure in the jet pump bell such that the negative pressure draws flue gas into the jet pump bell chamber that mixes with the combustion air.

15 . The apparatus of claim 14 , wherein the jet pump bell includes a tapered portion that tapers to an outlet having a smaller diameter than a maximum diameter of the jet pump bell.

16 . The apparatus of claim 15 , wherein the outlet of the jet pump has a diameter that is smaller than the diameter of the outlet of the jet pump bell.

17 . The apparatus of claim 14 , wherein the apparatus also includes a burner throat that is downstream from the jet pump bell.

18 . The apparatus of claim 17 , wherein the burner throat has a number of fuel inlets for mixing fuel into a combustion-flue gas mixture.

19 . The apparatus of claim 18 , wherein the number of fuel inlets are arranged to inject fuel in a downstream direction.

20 . The apparatus of claim 14 , wherein the jet pump outlet is centrally positioned within the jet pump bell with respect to an elongate axis of the jet pump bell.

Assignees

• Honeywell Int Inc

Inventors

• Taylor Curtis L
• Goh Joseph S F
• Patterson Brad
• Scholler Marek

Classifications

• F23C7/06 Primary

  for heating the incoming air (arrangements of regenerators and recuperators F23L15/00) · CPC title

• F23C2201/101

  in vertical direction, e.g. alternating lean and rich zones · CPC title

• F23C9/06 Primary

  for completing combustion · CPC title

• F23D14/64

  with injectors · CPC title

• F23C2900/09002

  Specific devices inducing or forcing flue gas recirculation · CPC title