Methods and apparatus for carbon dioxide-oxygen-coal combustion

a technology of carbon dioxide and coal combustion, which is applied in the direction of indirect carbon-dioxide mitigation, combustion types, lighting and heating apparatus, etc., can solve the problems of reduced flame speed, increased fire hazards in coal grinding mills, and reduced flame speed, so as to achieve better combustion

Inactive Publication Date: 2012-08-02
LINDE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0007]The invention provides for the use of a predominantly carbon dioxide-oxygen oxidant in place of air oxidant in a solid fuel burner. The solid fuel herein after referred to as coal may be any solid hydrocarbon fuel, such as various grades of coal, peat,

Problems solved by technology

However, substitution of the nitrogen diluent in the air oxidant with carbon dioxide decreases the coal combustion flame velocity more rapidly than the coal flammability limit and flame temperature.
If one tries to increase the carbon dioxide-oxygen-coal flame velocity to acceptable values by increasing the primary oxidant oxygen in carbon dioxide concentration, then the fire hazard in the coal gri

Method used

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  • Methods and apparatus for carbon dioxide-oxygen-coal combustion
  • Methods and apparatus for carbon dioxide-oxygen-coal combustion
  • Methods and apparatus for carbon dioxide-oxygen-coal combustion

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Embodiment Construction

[0025]FIG. 1 and FIG. 2 show an air-coal burner. The air-coal burner is typically round in shape as seen in FIG. 2. Viewing the air-coal burner from the side as in FIG. 1 shows a furnace wall 10 at the top and bottom which surrounds the air-coal burner. The air-coal burner comprises a quarl 20 which surrounds the closed end 7 of the air-coal burner. There are two openings, the first being the secondary air passage 6 which will concentrically surround the second opening, coal and primary air passage 5.

[0026]FIG. 2 shows the air-coal burner of FIG. 1 along the A-A axis and proffers a view of the air-coal burner from its end. The furnace wall 10 is shown surrounding the quarl 20 which has two openings in its middle. The first opening is the secondary air passage 6 which concentrically surrounds the second opening, the coal and primary air passage 5. Both these passages concentrically surround the closed end 7 of the air-coal burner.

[0027]FIG. 3 shows the air-coal burner with oxidant la...

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Abstract

A burner and method for oxidizing solid fuels wherein the burner has a lance having one or more nozzle feeds and one or more nozzle outlets concentrically surrounded by a primary oxidant passage which is concentrically surrounded by a secondary oxidant passage wherein the primary and secondary oxidant passages communicate at their proximal ends with a gas supply, the lance having a distal and proximal end and the one or more nozzle feeds is in communication with a gas supply.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims priority from U.S. provisional patent application Ser. No. 61 / 369,894 filed on Aug. 2, 2010.BACKGROUND OF THE INVENTION[0002]The invention provides for the use of a burner for carbon dioxide-oxygen-coal combustion processes. More particularly, the invention provides for a lance in connection with a burner to more effectively combust a solid fuel, such as coal, with an oxidant mixture comprising predominantly of carbon dioxide and oxygen, such as may be formed by the addition of substantially pure oxygen with flue gas recirculated from said combustion process.[0003]Air-coal burners and steam boilers for electrical power generation have been developed over many years through a process of trial and error. Typically, the motive air that is used to pulverize the coal is also used as the primary air in the air-coal burners. Primary air and pulverized coal typically flow through an annular conduit that is mesial to coaxial...

Claims

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Application Information

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IPC IPC(8): F23L7/00F23D1/00F23C9/00F23K3/02
CPCF22B37/00F23C6/045F23C2900/06041F23D1/00Y02E20/344F23L2900/07001F23L2900/07006F23M5/025Y02E20/322F23L7/007Y02E20/32Y02E20/34
Inventor SATCHELL, JR., DONALD P.RICHARDSON, ANDREW P.HIBBITT, IAN
Owner LINDE AG
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