外文翻譯(中英文)懸浮預(yù)熱技術(shù)(文件)
【正文】 e examination (1) check cyclone furnace tube and deposition without off brick or the eyewinker, inner cylinder are in good condition。 (4) the whirlwind tube blow plugging device might be flexible motion (electromagic valve), blow plugging pneumatic meets the standards。 lt。t amp。 O. when high separation efficiency and six little change, when d/D O. 6, separating efficiency decreases rapidly. So guarantee of separation efficiency should be emphasized the intermediate level resistance reduction whirlwind in the cylinder tube diameter size, d/d can be in 2/3 or so, and had better not amp。 gt。 Airflow around the tangent says with spiral type cylinder. Due to import can make spiral into a whirlwind of cylinder, air passage gradually narrowed to help to reduce the distance of inner particles move, the distance to increase airflow exhaust, avoid short circuit, can improve the separation efficiency. But also has a deal with pressure loss of air, the advantages of small, reason often used. 5, tube insertion depth The increase of steelflue insert depth, the resistance coefficient and separation efficiency is the increase of different processes. Insert depth, and imported high tube ratio of s/a = o. range, low resistance coefficient little change, and separation efficiency increases slightly, so sure of separation efficiency should be emphasized the intermediate level resistance reduction whirlwind cylinder should be in s/a or so, and had better not amp。t have heat transfer function, and should have the highest possible gassolid separation function。1 中文 4064 字 suspended preheatingtechnique A, suspended preheatingtechnique superiority Traditional dry process rotary kiln production of raw cement clinker, burn, deposed and preheat the plume are pleted in the process. Rotary kiln as burning into equipment, because it can provide section temperature distribution was homogeneous temperature field, and can ensure material at high temperatures have enough retention time, still can meet the requirements. But as heat and mass transfer equipment is not ideal, to need to heat larger preheating, deposing process is very not adapt. This is mainly due to the accumulation in kiln stove bottom of materials, from material layer surface through air, air with material contact area small, heat transfer efficiency low be caused by. Meanwhile, the stove deposing zone in feeding powder layered accumulation state, material layer to the internal deposition out carbon dioxide small area, the spread of airflow resistance, slow, and material layer internal granules are carbon dioxide gas membrane packages, carbon dioxide, differential pressure deposition temperatures the demand is high, it has increased the difficulty of carbonate deposition and reduce the deposition rate. Suspension preheater technical breakthroughs, fundamentally changed materials heat transfer condition, preheat the process of material accumulation state will the stove to warmup and deposing process, were moved to suspension preheater and deposition furnace inner state of suspension. Due to suspension in heat flow of materials, and airflow greatly increased the contact area, so the heat transfer speed fast, heat transfer efficiency is very high. Meanwhile, raw fuel at powder and suspended configuration, mixing, fuel burning hot timely to raw material and make the rapid deposition. Thus, due to rapid, heat transfer, mass transfer substantially improve the production efficiency and thermal efficiency. Second, the characteristics of suspension preheater kiln Suspension preheater kiln characteristic is in after a short length of rotary kiln installed suspension preheater, make originally in the states with accumulation plume material preheating and part of carbonate deposing process, moved to suspension 2 preheater through suspension state within a state of suspension, so the raw with heat flow powder, fully contact with the gas and solid phase interface big, heat transfer speed, high efficiency, improve the kiln production ability, reduce the heat consumption of clinker burn. At the
畢業(yè)設(shè)計(jì)相關(guān)推薦
鄂ICP備17016276號(hào)-1