Rotary furnace burner

US 8,449,292 B2
Filed: 11/08/2006
Issued: 05/28/2013
Est. Priority Date: 11/11/2005
Status: Expired due to Fees

First Claim

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1. A burner for a rotary tubular kiln with an annular channel arranged within a burner housing pipe for pneumatic transport and blowing out of fine-grained solid fuel through an annular gap nozzle, and with a number of jet air nozzles arranged concentrically around a circumference of the annular gap nozzle with nozzle openings divergent to a burner axis, through which combustion air is emitted, divided into a large number of separate, individual high-speed primary air jets, comprising:

a) the jet air nozzles with nozzle openings divergent to the burner axis being attached at an end of jet air pipes, which are jet air pipes arranged with their individual axes parallel to and spaced from the burner axis,b) the jet air pipes being arranged within an annular cooling air channel surrounding the solid fuel annular channel enclosed to an outside by the burner housing pipe, and being mounted at rotating mounting points so that each of the jet air pipes is rotatable around their individual jet air pipe axes while remaining parallel to the burner axis,c) the rotating mounting points of the jet air pipes being held in two spaced flange rings of the burner housing pipe, andd) a device for rotary adjustment of the jet air pipes being arranged outside the burner housing pipe at a cold end of the burner lance.

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Abstract

A rotary kiln burner particularly for fine-grained solid fuels such as coal dust, with jet air nozzles which can be adjusted easily and effectively during operation of the kiln in order to change the divergence angle of the high-speed jet air streams to change the flame shape and optimize the combustion. The jet air nozzles are attached with the nozzle openings divergent to the burner axis at the end of jet air pipes. The nozzle openings are arranged around the burner axis, with the axes parallel, with the jet air pipes arranged inside an annular cooling air space surrounding the coal dust channel and enclosed on the outside by the burner housing pipe. The nozzle openings are mounted so that they can rotate around the jet air pipe axes, so that on turning the jet air pipes at the cold end of the burner lance, the divergence of the high-speed jet air streams, and thus the angle of the jet air flow angle of the jet air flow cone angle of the jet air flow cone in relation to the coal dust cone, can be changed and adjusted.

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14 Claims

1. A burner for a rotary tubular kiln with an annular channel arranged within a burner housing pipe for pneumatic transport and blowing out of fine-grained solid fuel through an annular gap nozzle, and with a number of jet air nozzles arranged concentrically around a circumference of the annular gap nozzle with nozzle openings divergent to a burner axis, through which combustion air is emitted, divided into a large number of separate, individual high-speed primary air jets, comprising:
- a) the jet air nozzles with nozzle openings divergent to the burner axis being attached at an end of jet air pipes, which are jet air pipes arranged with their individual axes parallel to and spaced from the burner axis,b) the jet air pipes being arranged within an annular cooling air channel surrounding the solid fuel annular channel enclosed to an outside by the burner housing pipe, and being mounted at rotating mounting points so that each of the jet air pipes is rotatable around their individual jet air pipe axes while remaining parallel to the burner axis,c) the rotating mounting points of the jet air pipes being held in two spaced flange rings of the burner housing pipe, andd) a device for rotary adjustment of the jet air pipes being arranged outside the burner housing pipe at a cold end of the burner lance.
- View Dependent Claims (2, 3, 4, 5, 6, 7)
- - 2. A burner in accordance with claim 1, wherein the annular chamber between the two spaced flange rings within the burner housing pipe equipped with a jet air feed pipe is designed as a flow chamber, from which supplied jet air flows through holes in the jet air pipes into the pipes themselves and then out through the jet air nozzles.
  - 3. A burner in accordance with claim 1, wherein flexible hoses for jet air supply to the jet air pipes are connected the jet air pipes at their outer ends away from the jet air nozzles.
  - 4. A burner in accordance with claim 1, wherein the burner housing pipe is equipped with a cooling air supply pipe, through which cooling air flows into the annular chamber between the burner housing pipe and the solid fuel pipe, where under the flow created by the jet air pipes it cools the burner housing pipe from the inside, before leaving the annular chamber through gaps between neighboring jet air nozzles.
  - 5. A burner in accordance with claim 1, wherein an annular spacer is provided in the annular cooling air channel between the burner housing pipe and the solid fuel pipe, through which the cooling air can flow, which ensures a correct spacing of the jet air pipes and concentric pipes forming the annular solid fuel channel.
  - 6. A burner in accordance with claim 1, wherein the annular cooling air space between the burner housing pipe and the solid fuel pipe, at least one of the gaps between neighboring jet air pipes can be used for the installation of a pipe for the supply of an alternative fuel.
  - 7. A burner in accordance with claim 1, wherein as a means of rotary adjustment of the jet air pipes, these are equipped with pinions at their outer ends, which engage in one of a ring and belt and linked chain with internal teeth.

8. A burner for a rotary tubular kiln, comprising:
- a burner housing pipe extending along a burner axis,an annular channel arranged within the burner housing pipe for the pneumatic transport and blowing out of fine-grained solid fuel through an annular gap nozzle,a plurality of jet air nozzles arranged concentrically around a circumference of the annular gap nozzle with nozzle openings divergent to the burner axis, through which combustion air is emitted, the jet air nozzles being divided into a plurality of separate, individual high-speed primary air jets,the jet air nozzles being attached at the end of jet air pipes, which pipes are arranged with their individual axes parallel to the burner axis and spaced therefrom,the jet air pipes being arranged within an annular cooling air channel surrounding the solid fuel annular channel enclosed to the outside by the burner housing pipe, and being mounted so that they can each rotate around their individual jet air pipe axes while remaining parallel to the burner axis,rotating mounting points of the jet air pipes being held in two spaced flange rings of the burner housing pipe, anda device for rotary adjustment of the jet air pipes being arranged outside the burner housing pipe at a cold end of the burner lance.
- View Dependent Claims (9, 10, 11, 12, 13, 14)
- - 9. A burner in accordance with claim 8, wherein an annular chamber between the two spaced flange rings within the burner housing pipe comprises a low chamber, from which supplied jet air flows through holes in the jet air pipes into the pipes themselves and then out through the jet air nozzles.
  - 10. A burner in accordance with claim 8, wherein flexible hoses for jet air supply to the jet air pipes are connected the jet air pipes at outer ends of the jet air pipes away from the jet air nozzles.
  - 11. A burner in accordance with claim 8, wherein the burner housing pipe is equipped with a cooling air supply pipe, through which cooling air flows into the annular chamber between the burner housing pipe and the solid fuel pipe, where under the flow created by the jet air pipes the cooling air cools the burner housing pipe from the inside, before leaving the annular chamber through gaps between neighboring jet air nozzles.
  - 12. A burner in accordance with claim 8, wherein an annular spacer is provided in the annular cooling air channel between the burner housing pipe and the solid fuel pipe, through which the cooling air can flow, which ensures a correct spacing of the jet air pipes and concentric pipes forming the annular solid fuel channel.
  - 13. A burner in accordance with claim 8, wherein in the annular cooling air space between the burner housing pipe and the solid fuel pipe, at least one of the gaps between neighboring jet air pipes can be used for the installation of a pipe for the supply of an alternative fuel.
  - 14. A burner in accordance with claim 8, wherein as a means of rotary adjustment of the jet air pipes, these are equipped with pinions at their outer ends, which engage in one of a ring and belt and linked chain with internal teeth.

Specification

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Litigation Campaign Assessment

Current Assignee
KHD Humboldt Wedag GmbH
Original Assignee
KHD Humboldt Wedag GmbH
Inventors
Knoch, Alexander, Schrder, Ernst, Kluthe, Karin, Wenzel, Wilhelm, Loggia, Giovanni
Primary Examiner(s)
Denion, Thomas
Assistant Examiner(s)
Inacay, Brian

Application Number

US12/089,719
Publication Number

US 20080213714A1
Time in Patent Office

2,393 Days
Field of Search

431/284, 431/285, 431195-201
US Class Current

431/284
CPC Class Codes

F23D 1/00 Burners for combustion of p...

Rotary furnace burner

First Claim

1 Assignment

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Accused Products

Abstract

8 Citations

14 Claims

Specification

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Rotary furnace burner

First Claim

1 Assignment

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Subscription Required

0 Petitions

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Accused Products

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Abstract

8 Citations

14 Claims

Specification

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Solutions

Use Cases

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