Cement kiln burner device and method for operating the same

Patent metadata

Field	Value
Publication number	US-11306915-B2
Application number	US-201816643155-A
Country	US
Kind code	B2
Filing date	Sep 26, 2018
Priority date	Sep 26, 2018
Publication date	Apr 19, 2022
Grant date	Apr 19, 2022

Abstract

A cement kiln burner device includes a powdered-solid-fuel flow channel having means for swirling a powdered-solid-fuel flow; a first air flow channel placed inside the powdered-solid-fuel flow channel to be adjacent to the powdered-solid-fuel flow channel having means for swirling an air flow; a second air flow channel placed in an outermost side outside the powdered-solid-fuel flow channel having means for straightly forwarding an air flow; and a combustible-solid-waste flow channel placed inside the first air flow channel. The second air flow channel is divided in a circumferential direction into four or more opening portions adapted to form ports for injecting air flows, and is configured to control flow rates of the air flows ejected from the opening portions, independently for each opening portion.

First claim

What is claimed is:

1. A cement kiln burner device including a plurality of flow channels partitioned by a plurality of concentric cylindrical members, the cement kiln burner device comprising:
a powdered-solid-fuel flow channel including means for swirling a powdered-solid-fuel flow;
a first air flow channel placed inside the powdered-solid-fuel flow channel to be adjacent to the powdered-solid-fuel flow channel, the first air flow channel including means for swirling an air flow;
a second air flow channel placed in an outermost side outside the powdered-solid-fuel flow channel, the second air flow channel including means for straightly forwarding an air flow;
a combustible-solid-waste flow channel placed inside the first air flow channel, wherein
the second air flow channel is divided in a circumferential direction into four or more opening portions adapted to form ports for injecting air flows, and is configured to control flow rates of the air flows ejected from the opening portions, independently for each opening portion;
a third air flow channel placed outside the powdered-solid-fuel flow channel and inside the second air flow channel, the third air flow channel including means for swirling an air flow; and
a fourth air flow channel placed outside the third air flow channel and inside the second air flow channel, the fourth air flow channel including means for straightly forwarding an air flow, wherein
the fourth air flow channel is divided in the circumferential direction into four or more opening portions adapted to form ports for injecting air flows, and is configured to control flow rates of the air flows ejected from the opening portions, independently for each opening portion.

2. The cement kiln burner device according to claim 1 , when the second air flow channel is taken along a plane orthogonal to an axis center, a center angle formed by connecting opposite ends, in the circumferential direction, of each opening portion included in the second air flow channel and the axis center is identical for each opening portion.

3. A method for operating the cement kiln burner device according to claim 2 , comprising ejecting an air flow from each opening portion included in the second air flow channel at a flow velocity of 0 m/s to 400 m/s (except when all air flows ejected from all the opening portions have a flow velocity of 0 m/s).

4. A method for operating the cement kiln burner device according to claim 1 , comprising ejecting an air flow from each opening portion included in the second air flow channel at a flow velocity of 0 m/s to 400 m/s (except when all air flows ejected from all the opening portions have a flow velocity of 0 m/s).

Assignees

• Taiheiyo Cement Corp

Inventors

• Sano Yuya
• Horiba Kana
• Naitou Kouichi

Classifications

• F23D99/004 Primary

  for use in particular heating operations · CPC title

• F23D2900/01001

  Pulverised solid fuel burner with means for swirling the fuel-air mixture · CPC title

• F23G7/12

  of plastics, e.g. rubber · CPC title

• F23D2204/00

  Burners adapted for simultaneous or alternative combustion having more than one fuel supply · CPC title

• Y02P40/125

  Fuels from renewable energy sources, e.g. waste or biomass · CPC title