Method and apparatus of controlling combustion in oxyfuel combustion boiler

US20110104624A1Inactive Publication Date: 2011-05-05IHI CORP +1
12 Cites 5 Cited by

Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
IHI CORP
Publication Date
2011-05-05
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

A method and an apparatus of controlling combustion in an oxyfuel combustion boiler are provided which ensure a sufficient furnace heat absorption through prevention of lowering of flame temperature, enabling oxyfuel combustion operations to be performed in a stable manner. A boiler-brought-in oxygen density which is an oxygen density for a total amount of gases introduced into a coal burning boiler is calculated and a flow rate of total recirculating gases is controlled such that the boiler-brought-in oxygen density falls within a predetermined range.
Need to check novelty before this filing date? Find Prior Art

Description

TECHNICAL FIELD

[0001] The present invention relates to a method and an apparatus of controlling combustion in an oxyfuel combustion boiler.BACKGROUND ART

[0002] An increased carbon dioxide (CO2) density in the atmosphere has proved to be one of major factors of global warming which has recently come into attention as a global-scale environmental problem. A thermal power plant appears close-up as a fixed source of discharging these substances. Fuel for thermal power generation may be oil, natural gas and coal, among which coal is especially anticipated to have a large future demand due to its greater potential reserves.

[0003] Coal contains a higher percentage of carbon as compared with natural gas and oil, together with other components such as hydrogen, nitrogen and sulfur, and ash as an inorganic component. Therefore, when coal is burned in the air, most of the composition of the combustion exhaust gas is occupied by nitrogen (about 70%), with the remainder occupied by carbon dioxide C...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More