不锈钢列管式换热器在石油、化工、轻工、制药、动力等工业生产中,常常用作把低温流体加热或许把高温流体冷却,把液体汽化成蒸气或许把蒸汽冷凝成液体。
1、其流程指不锈钢列管式换热器内一种介质同动方向的一组并联流道,而流道指产品内相邻两板片组成的介质活动通道。一般情况下,将若干个流道按并联或串联的方法连接起来,构成冷、热介质通道的不同组合。流程组合方式应依据换热和流体阻力核算,依据工艺条件要求承认。尽量使冷、热水流道内的对流换热系数相等或接近,然后有一个不错的传热效果。
2、关于产品的规划选型,一般情况下对压降有一些要求,所以对其进行校核。如果校核压降高于允许压降,需要重新进行规划选型核算,直到符合工艺要求停止。
3、应依据换热场合的实际需要定板片型式或波纹式。对流量大允许压降小的情况,应选用阻力小的版型,反之选用阻力大的版型。依据流体压力和温度的情况,承认挑选可拆卸式或许钎焊式。承认版型时不宜挑选单板面积太小的板片,以免板片数量过多,板间流速偏小,传热系数过低,对较大的不锈钢列管式换热器应注意这个问题。
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