CAJ | 학술논문

在一套组合约束型提升管冷态实验装置上，通过实验研究了不同操作条件下提升管出口气固分布器的压降，并与常规气体分布器压降进行了对比。实验结果表明，在零床层及有床层的操作模式下，气固分布器压降均随提升管内表观气速和颗粒循环强度的增加而增大，在颗粒循环强度较低时，气固分布器压降曲线变化的斜率随着表观气速的增加而增大，在颗粒循环强度较高时，气固分布器压降曲线变化的斜率随着表观气速的增加而减小；随着开孔率及上部流化床层压降增加，气固分布器压降呈降低趋势，当流化床层压降达到一定程度后，分布器各孔方可实现有效布气，此后气固分布器压降趋于近似不变；在相同表观气速及开孔率下，气固分布器压降大于常规气体分布器压降。
재일투조합약속형제승관랭태실험장치상，통과실험연구료불동조작조건하제승관출구기고분포기적압강，병여상규기체분포기압강진행료대비。실험결과표명，재령상층급유상층적조작모식하，기고분포기압강균수제승관내표관기속화과립순배강도적증가이증대，재과립순배강도교저시，기고분포기압강곡선변화적사솔수착표관기속적증가이증대，재과립순배강도교고시，기고분포기압강곡선변화적사솔수착표관기속적증가이감소；수착개공솔급상부류화상층압강증가，기고분포기압강정강저추세，당류화상층압강체도일정정도후，분포기각공방가실현유효포기，차후기고분포기압강추우근사불변；재상동표관기속급개공솔하，기고분포기압강대우상규기체분포기압강。
Based on a cold model experimental setup of riser reactor with combined restraint outlet, an experiment was conducted to analyze pressure drop of gas-solids distributor at the outlet of riser under different circumstances. Gas-solids distributor’s pressure drop increased with increasing superficial gas velocity and solids flux, with or without active operating bed. The slope of gas-solids distributor’s pressure drop curve increased with increasing superficial gas velocity at lower solids flux, while decreased at higher solids flux. Pressure drop of the distributor declined with increasing distributor’s aperture ratio and increasing pressure drop of the upper fluidized bed. When the pressure drop of the upper fluidized bed increased to a specific value, the holes of the distributor were all able to be passed through by gas-solids flow, with the distributor pressure drop approximately unchangeable. At the same superficial gas velocity, pressure drop of gas-solids distributor was bigger than that of conventional gas distributor.