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第期氯碱工业
5 No. 5
2006年 5月 Chlor - A lkali Industry May, 2006
蒸发Ⅲ效真空系统的改进设计
段全军,王玉华,周桂亭
(青岛天元化工股份有限公司,山东胶南 266400 )
[关键词] 烧碱;蒸发;真空度
[摘要] 通过分析和探讨影响隔膜法烧碱蒸发系统Ⅲ效真空度的几个因素,提出其改进设计措施。重点介
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绍了大气冷凝器的上水泵使用低扬程、大流量泵的工艺,以及正常开车时,在不开启喷射泵的情况下,通过旁路管
可以排出不凝气等技改措施。
[中图分类号] TQ114. 268 [文献标识码] B [文章编号] 1008 - 133X (2006) 05 - 0030 - 03
Im provem en t design ing on the vacuum system of Ⅲ- effect evapora tion
DUAN Q uan - jun, WANG Yu - hua, ZHOU Gui - ting
(Q ingdao Tianyuan Chem ical Industry Co. , L td. , J iao nan 266400, China)
Key words: caustic soda; evaporation; vacuum degree
Abstract: The design measures on the vacuum system of Ⅲ- effect evaporation are suggested by ana
lyzing and discussing a few factors effecting the vacuum tightness of Ⅲ- effect in diaphragm caustic soda
evaporation system. The p rocess is emphatically introduced about using the low - lift and large - flow
pump s as the water charging pump s of the barometric condensers, as well as the technic imp rovement
measures by discharging incondensable gas through by - pass p ipes during normal running without operat
ing ejector vacuum pump s.
隔膜法烧碱生产中,蒸发汽耗是电耗外的另一真空度每提高 0. 007 MPa (相当于降低 0. 007 MPa
耗能大项,蒸发汽耗直接影响烧碱生产的总能耗与的压力)温差可增加 5~12 ℃,真空度越高,温差的
实际生产成本。因此,只有在确保产品质量和降低增幅越大。真空度越高,末效沸点越低,这不但减少
电解电耗的同时,有效降低蒸发汽耗,才能不断降低了碱液离开蒸发系统带走的热量,而且由于提高了
生产成本,提高产品的市场竞争力。真空度,所增加的温差会自行分配到各效,可降低