基于流化床布风板压降调节的细粒煤分选

Fine coal beneficiation based on regulation pressure drop of air distributor in gas-solid fluidized bed

为研究煤炭的清洁利用问题,引入多层滤布对气固流化床布风板压降及床层流化特性进行调节,采用DASP压降测试系统探讨床层压降以及最小流化速度的变化规律,并进行细粒煤分选试验。结果表明:在传统流化床的基础上运用多层滤布有助于改善流化床层的流化特性;引入多层滤布后的气固流化床可使精煤灰分达到10.83%,促进细粒煤脱灰,利于环境保护。

In-order-to-study-the-clean-utilization-of-coal,multilayer-filter-cloth-was-introduced-to-regulate-the-pressure-drop-and-fluidization-characteristics-in-gas-solid-fluidized-bed.-The-DASP-testing-system-was-used-to-study-the-variation-of-bed-pressure-drop-and-minimum-fluidization-velocity.-The-results-show-that-using-of-multilayer-filter-cloth-based-on-typical-fluidized-bed-is-helpful-to-improve-fluidization-characteristics.-The-ash-content-reaches-10.83%-separated-by-gas-solid-fluidized-bed-with-multilayer-filter-cloth.-This-method-promotes-the-ash-removal-from-fine-coal-and-had-important-significance-for-environmental-protection.