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Oxygen combustion boiler and pulverized coal burner

A technology of pulverized coal burner and oxy-combustion boiler, which is applied to the burner, burner, combustion air/fuel supply and other directions of burning powder fuel, can solve the problem of abnormally high temperature of oxygen nozzle and pulverized coal burner, pulverized coal burner, etc. Uneven combustion, inability to fully mix oxygen and pulverized coal, etc., to achieve the effect of inhibiting high temperature

Active Publication Date: 2013-01-02
IHI CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, when a pulverized coal burner and an oxygen nozzle are simply arranged in an oxy-combustion boiler, there is a problem that oxygen cannot be supplied properly and the combustion from the pulverized coal burner becomes uneven. abnormally high temperature problem at the front end of the
Especially when the oxygen nozzle is arranged in the pulverized coal supply flow path as disclosed in the prior art literature, there is a problem that the oxygen and the pulverized coal cannot be fully mixed, and the uniform combustion cannot be achieved.

Method used

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  • Oxygen combustion boiler and pulverized coal burner
  • Oxygen combustion boiler and pulverized coal burner
  • Oxygen combustion boiler and pulverized coal burner

Examples

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Embodiment Construction

[0036] Embodiments of the present invention will be described below with reference to the drawings.

[0037] Figure 1 ~ Figure 3 It is an embodiment example of the pulverized coal burner of the oxygen combustion boiler of the present invention.

[0038] The pulverized coal burner of the oxygen combustion boiler in the embodiment example is provided with a burner outer cylinder 4 and a burner inner cylinder 5 in the same core shape. The air box 2 faces the throat 3 formed on the furnace wall (not shown) of the oxy-fuel boiler 1 , and the front end 6 of the burner outer cylinder 4 and the burner inner cylinder 5 opens toward the throat 3 .

[0039] There is a fuel burner 7 at the axial center of the burner inner cylinder 5 , and fuel such as oil is supplied to the fuel burner 7 from the outside of the burner inner cylinder 5 , and air from the wind box 2 is introduced into the burner inner cylinder 5 through the introduction line 8 .

[0040] Between the burner inner cylinder...

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PUM

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Abstract

In order to provide a pulverized coal burner for an oxyfuel combustion boiler which attains uniform combustion from a pulverized coal burner and which constrains a temperature rise of an oxygen injection nozzle, burner inner and outer cylinders are arranged to penetrate a wind box 2 and come close to a throat portion 3. A pulverized coal feed passage 9 is provided between the burner inner and outer cylinders 4 and 5. A plurality of oxygen injection means 11 are arranged outwardly of the burner outer cylinder 4 so as to directly feed oxygen ahead of the burner outer cylinder 4.

Description

technical field [0001] The present invention relates to a pulverized coal burner for an oxy-fuel boiler. Background technique [0002] In recent years, in order to prevent global warming, it is desired to reduce the emission of greenhouse gases such as carbon dioxide, and technology is being developed to recover carbon dioxide from the exhaust gas from oxy-fuel boilers and dispose of it in the ocean or land. [0003] This type of oxygen combustion boiler has an oxygen introduction flow path and an exhaust gas circulation flow path. The oxygen introduction flow path introduces oxygen into the atmosphere supply flow path connected to the wind box on the inlet side of the oxygen combustion boiler body, and the exhaust gas circulation flow path is connected to the oxygen combustion boiler body. The exhaust flow path connected to the outlet side of the main body is branched and connected to the air supply flow path. When starting, the air is introduced from the atmospheric supply...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23D1/00F23C99/00
CPCF23L2900/07005Y02E20/344F23D2900/00006F23D2201/10F23D1/00F23L7/007Y02E20/34
Inventor 照下修平山田敏彦渡边修三内田辉俊
Owner IHI CORP
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