Unlock instant, AI-driven research and patent intelligence for your innovation.

Reduction of mercury from a coal fired boiler

A technology of combustion chamber and post-combustion, which is applied in the direction of controlled combustion, combustion method, and treatment of combustion products, and can solve the problems of expensive use

Inactive Publication Date: 2010-05-12
ABB TECH AG
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of injected carbon as a sorbent is quite expensive as the cost of the sorbent material accounts for about 60% to 70% of the total cost of the mercury removal process

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Reduction of mercury from a coal fired boiler
  • Reduction of mercury from a coal fired boiler
  • Reduction of mercury from a coal fired boiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] figure 1 A power generation system 10 is depicted that includes a coal-fired steam generator 12 with a mercury control system 14. The system includes the following components to facilitate mercury removal and optimization. The letters BE shown in the steam generator 12 represent A real-time method of calculating boiler efficiency (BE). The most common and accepted method of calculating BE is through the use of ASME standards. The significance of the calculation of the present invention is the efficiency consideration defined by dry gas loss and unburned carbon (UBC) .For the purpose of describing this invention, UBC and RCA are the same.

[0017] The letter TE shown at the combustion gas outlet 12b of the steam generator 12 indicates a measured value of the temperature of the combustion gas in the vicinity of the PCS. In the region 14a where the PCS reacts with mercury in the exhaust of the coal-fired steam generator 12, specific process measurements are monitored for...

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

PUM

No PUM Login to View More

Abstract

A method and system are disclosed for achieving reduced mercury emissions from a power plant at a minimum cost. The parameters of the combustion chamber and a sorbent injector are manipulated to control the residual carbon in ash and the injected sorbent. These two elements combine to reduce mercury in the exhaust gas to an acceptable level.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application No. 60 / 912,929, filed April 20, 2007, entitled "Reduction of Mercury from a Coal Fired Boiler," and hereby claims priority under 35 U.S.C 119(e) rights and interests, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to coal fired boiler systems and more particularly to reducing mercury emissions from such systems. Background technique [0004] Mercury (Hg) is considered a hazardous air pollutant and is one of the most toxic volatile metals in the air. Elemental mercury vapor can be widely dispersed from emission sources. Other forms of mercury contamination include organic and inorganic compounds that accumulate in plants and animals. Mercury is a constituent of coal minerals. Its emissions from coal-fired power plants are suspected to be a major source of environmental m...

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F23J15/00F23N5/00
CPCF23J2215/60F23J2219/30F23J2217/102F23N5/003B01D53/64F23J2217/103F23J15/003B01D53/10B01D2257/602Y02T50/60
Inventor P·C·苏莱恩汤青张晖
Owner ABB TECH AG