水捕集回收干燥冷却机(DC)首层废热工艺分析
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摘要
水捕集回收干燥冷却机(DC)首层废热具有重要的节能和环保意义。DC首层出口废汽温度通常控制在74℃,水蒸气含量为22. 2%左右,相对湿度80. 6%。逆流捕集可将废汽中大部分粕沫捕集下来,并将水加热至70. 8℃,通过刮刀过滤器除去粕沫后,热水给进干燥风机的进口冷风加热,可将冷风温度从25℃加热至64. 8℃。5 000 t/d大豆加工生产线,增加水捕集节能系统每吨大豆可节约蒸汽消耗7. 5 kg,对节约总蒸汽消耗具有明显的效果。
Water trapping to recovery heat from DC first tray has important energy saving and environmental protection significance. The waste vapor from DC first tray with the temperature of 74 ℃,in which has 22. 2% steam,results in the relative humidity of 80. 6%. By countercurrent contacting,most of fines in the waste vapor were washed down,and water could be heated to 70. 8 ℃. After fines in the water were removed by scraper filter,the hot water was used to heat the cold wind from drying fan inlet from 25 ℃ to 64. 8 ℃. For 5 000 t/d soybean processing line,adding water trapping system could reduce steam consumption of 7. 5 kg/t,and the effect of saving total steam comsuption was obvious.
Water trapping to recovery heat from DC first tray has important energy saving and environmental protection significance. The waste vapor from DC first tray with the temperature of 74 ℃,in which has 22. 2% steam,results in the relative humidity of 80. 6%. By countercurrent contacting,most of fines in the waste vapor were washed down,and water could be heated to 70. 8 ℃. After fines in the water were removed by scraper filter,the hot water was used to heat the cold wind from drying fan inlet from 25 ℃ to 64. 8 ℃. For 5 000 t/d soybean processing line,adding water trapping system could reduce steam consumption of 7. 5 kg/t,and the effect of saving total steam comsuption was obvious.
引文
[1]HAMM W.Edible oil processing[M].2nd ed.UK:AJohn Wiley&Sons,Ltd.,Publication,2013:117-123.