By the end of 1997, totally ten 300 MW grade W-flame double arch boilers, firing anthracite or meager coal, were operating in China. These W-flame boilers were designed and supplied separately by four different manufa...By the end of 1997, totally ten 300 MW grade W-flame double arch boilers, firing anthracite or meager coal, were operating in China. These W-flame boilers were designed and supplied separately by four different manufacturers in the world, using either their own technology or foreign patent. It is shown by a recent survey that all these boilers are having a normal operation. However, there is still some room to be improved, such as boiler furnace configuration. Also, for raising the burnout rate and avoiding local slagging, furnace volume and burner layout need to be deliberated. And the tineness of pulverized coal and the air / coal ratio need to be improved. Some suggestions are made in this paper for optimizing the boiler design, Test data for the minimum stable combustion load and NOx emission are given too.展开更多
As shown in the results of the Survey of the Confidence of 100 Chinese Economists,conducted by China Economic Monitoring and Analysis Center,National Bureau of Statistics,the confidence index of the economists in the ...As shown in the results of the Survey of the Confidence of 100 Chinese Economists,conducted by China Economic Monitoring and Analysis Center,National Bureau of Statistics,the confidence index of the economists in the fourth quarter of 2007 was 5.52,an average index since 2004.展开更多
文摘By the end of 1997, totally ten 300 MW grade W-flame double arch boilers, firing anthracite or meager coal, were operating in China. These W-flame boilers were designed and supplied separately by four different manufacturers in the world, using either their own technology or foreign patent. It is shown by a recent survey that all these boilers are having a normal operation. However, there is still some room to be improved, such as boiler furnace configuration. Also, for raising the burnout rate and avoiding local slagging, furnace volume and burner layout need to be deliberated. And the tineness of pulverized coal and the air / coal ratio need to be improved. Some suggestions are made in this paper for optimizing the boiler design, Test data for the minimum stable combustion load and NOx emission are given too.
文摘As shown in the results of the Survey of the Confidence of 100 Chinese Economists,conducted by China Economic Monitoring and Analysis Center,National Bureau of Statistics,the confidence index of the economists in the fourth quarter of 2007 was 5.52,an average index since 2004.
