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Effect of Dust-Collecting System Structure on Its Productivity

机译：集尘系统结构对其生产率的影响

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摘要

The effect of particle classification efficiency exerted on the productivity of dust-collecting systems with a ball-drum mill is considered. By using a mathematical model, the maximum productivity of dust-collecting systems with different equipment and structure has been determined, and the boundary particle size classification in a separator providing the production of dust with a preset fineness has been found. For each of the considered schemes of a dust-collecting system, a quantitative relationship is established between the system productivity, the fineness of the finished dust, and the particle classification efficiency inherent in the separators. It is shown that, for a preset fineness of the finished dust, the repeated separation of the recycled material is allowed only when the classification boundary of the particles in the main separator decreases. It is proven that the scheme with a winnowing of recycled material up to the fineness of the finished dust is unpromising since the use of a separator with an efficiency of particle classification lower than that inherent in the main separator leads to a decrease in the productivity of the dust-collecting system. In the scheme winnowing recycled material up to the fineness of the mill product wherein one can use winnowing separators having a less efficient particle separation, the productivity of the dust-collecting system depends on the dust circulation in the “main separator–winnowing separator” circuit. The productivity of the dust-collecting system depending on the fineness of the finished dust and the classification efficiency separators is determined. Schemes are recommended with a modernized main separator and with winnowing recycled material up to the size of the mill product or with a joint application of these schemes. The replacing of the main separator by a more efficient one should provide an increase in the dust-collecting system productivity by 19.2% with obtained dust having the fineness R ~(90)= 7% and by 5.2% at R ~(90)= 25%. The application of a scheme of winnowing up to the fineness of the mill product with a main separator should provide an increase in the productivity of a dust-collecting system by 14.0–19.4% at R ~(90)= 7% and by 5.3–6.6% at R ~(90)= 25%. Replacing the main separator and the winnowing of the recycled material should provide an increase in the productivity of a dust-collecting system by 28–33% at R ~(90)= 7% and by 6.6–7.9% at R ~(90)= 25%.
机译：考虑了球磨机对颗粒分类效率对集尘系统生产率的影响。通过使用数学模型，已确定了具有不同设备和结构的集尘系统的最大生产率，并且找到了可提供具有预设细度的粉尘的分离器中的边界粒度分类。对于每个考虑的粉尘收集系统方案，在系统生产率，成品粉尘细度和分离器固有的颗粒分类效率之间建立定量关系。结果表明，对于最终粉尘的预设细度，仅当主分离器中颗粒的分类边界减小时才允许重复使用回收材料。事实证明，采用回收粉尘直至最终粉尘细度的方案是没有希望的，因为使用颗粒分类效率低于主分离器固有效率的分离器会导致生产效率降低。集尘系统。在将回收的物料风选到工厂产品细度的方案中，可以使用颗粒分离效率较低的风选分离器，集尘系统的生产率取决于“主分离器-风选分离器”回路中的灰尘循环。确定取决于最终粉尘和分级效率分离器的粉尘收集系统的生产率。建议使用现代化的主分离器，风选回收的物料达到工厂产品大小的方案，或者与这些方案联合应用。用更高效的分离器替换主分离器后，所获得的粉尘的细度为R〜（90）= 7％，集尘系统的生产率将提高19.2％，而在R〜（90）=的情况下，集尘系统的生产率将提高5.2％。 25％。采用带主分离器的粉煤灰细度分级方案的应用应使集尘系统的生产率在R〜（90）= 7％时提高14.0-19.4％，在5.3％时提高R〜（90）= 25％时为6.6％。更换主分离器和回收材料的风选将使集尘系统的生产率在R〜（90）= 7％时提高28-33％，在R〜（90）时提高6.6-7.9％。 = 25％。

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