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首页> 外文会议>International Chemical Recovery Conference v.1; 20040606-20040610; Charleston,SC; US >BLSpray: Understanding the Effect of Black Liquor Properties and Splash Plate Nozzle Configuration on Spray Characteristics
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BLSpray: Understanding the Effect of Black Liquor Properties and Splash Plate Nozzle Configuration on Spray Characteristics

机译：BLSpray：了解黑液特性和防溅板喷嘴配置对喷雾特性的影响

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摘要

Black liquor spraying is an important parameter for proper combustion in a chemical recovery boiler. Understanding the spray distribution and droplet size of a particular operation allows the operator to optimise combustion. An ideal spray minimises carryover while maintaining a char bed shape that maximises chemical reduction. Measuring spray distribution and droplet mean diameter in-situ is very difficult. As a consequence, work began in September 2000 to develop a computer code (BLSpray) that can accurately predict black liquor spray flow characteristics. The three main uses of the code will be as follows: develop an improved nozzle based on understanding the effect changes in nozzle configuration and black liquor properties have on spray characteristics; given the operating parameters of a boiler, predict the black liquor droplet size, or conversely, determine the optimum nozzle selection for the specific operation; provide input for CFD modelling. The present code has been validated against laboratory results. This paper will describe the status of the code. It will also describe the results obtained by varying black liquor properties and nozzle configuration. Liquor properties considered include viscosity, surface tension and density. Nozzle configurations considered include velocity, sideskirts, different plate shapes and different bore shapes.
机译：黑液喷雾是化学回收锅炉中正确燃烧的重要参数。了解特定操作的喷雾分布和液滴大小可以使操作员优化燃烧。理想的喷雾剂可最大程度地减少残留物，同时保持可最大化化学还原性的炭层形状。原位测量喷雾分布和液滴平均直径非常困难。结果，从2000年9月开始开发可精确预测黑液喷雾流量特性的计算机代码（BLSpray）。该规范的三个主要用途如下：在了解喷嘴配置和黑液特性对喷雾特性的影响变化的基础上，开发一种改进的喷嘴；给定锅炉的运行参数，预测黑液液滴的大小，或者反过来，确定特定操作的最佳喷嘴选择；为CFD建模提供输入。本代码已针对实验室结果进行了验证。本文将描述代码的状态。它还将描述通过改变黑液特性和喷嘴配置获得的结果。考虑的液体性质包括粘度，表面张力和密度。考虑的喷嘴配置包括速度，侧裙，不同的板形和不同的孔形。

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