doc

Description of gas-solid two-phase resistance loss

  • 2013-09-22
  • 281KB
  • Points it Requires : 2

  Pulverized coal concentration-lean combustion technology is widely used due to its low-load stable combustion and low NOx emissions. The main indicators for measuring its technical performance are concentration-lean ratio and resistance loss, but they are often contradictory. In order to achieve good stable combustion performance, a higher concentration-lean ratio is required, which will cause greater resistance loss; conversely, the concentration effect is poor, affecting low-load stable combustion. In the burner modification, if the resistance of the concentration-lean separation device is too large, it will not only affect the uniformity of the air-powder distribution at the four corners of the burner, but also increase the air leakage of the air preheater. Therefore, the technical performance of high concentration-lean ratio and low flow resistance is very important for the pulverized coal concentration-lean separation device. In this paper, combined with the developed swirl concentration-lean combustion technology [1], the resistance characteristics of the impact-type inertial pulverized coal separator in the horizontal straight circular tube are studied to obtain the optimal design and operation parameters.

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