In special cases very considerable quantities of waste gypsum from phosphoric acid plants are used to reclaim land after flooding of the sea. 在特殊的情况下,磷酸厂产的大量废石膏用来填筑被海水泛滥过的土地。
The hole purify implement can not only separate impurity from the chrome acid, but also reclaim the chrome acid in the lotion. 多孔净化器既可分离镀铬液中的杂质,又可回收清洗水中的铬酸。
The factors were studied which influenced elution curves of fruit acid on LSI-1031 anion exchange resin and the reclaim efficiency of fruit acid; The optimum conditions were determined. 研究了不同因素对果酸洗脱曲线及回收率的影响,确定了果酸洗脱回收的最佳工艺条件。
Practical runing data showed that the furnace can adapt well for the operating needs of phosphoric acid production by hot process, and can reclaim the majority combustion heat of phosphorus to achieve high-level efficiency of waste heat recovery. 实际运行结果表明,该塔不仅能保证磷酸的正常生产,而且可以副产出相当数量饱和蒸汽,实现高效率的余热回收。
To introduce the principle and advantages. Throught practical experience that application of ultrasonic cleaning to continous production line of steel wire to clean metal oxide and residual stearic acid, disposal and reclaim of rinsing water and maintenance and regeneration of cleaning liquid are set forth. 介绍超声波清洗的原理及其优点,通过在钢丝连续生产线中使用超声波技术清洗钢丝表面的金属氧化物、残留硬脂酸的实践经验,阐述生产过程中漂洗水的处理、回收及清洗液的维护再生方法。
It was shown that the eluant concentration, flow rate and temperature gradient elution influenced elution curves of fruit acid on LSI-1031 anion exchange resin and the reclaim efficiency of fruit acid; The optimum parameters were: 2% NaOH, 2BV/ h and 20 ℃. 结果表明:洗脱剂浓度、柱操作流速、温度及梯度洗脱对洗脱曲线及回收率有不同程度的影响,果酸洗脱回收最佳条件为:2%NaOH、2BV/h、20℃;
Complexation extraction was used to treat the acetic acid in waste water of furfural production. The extraction efficiency can arrive at 97%& 99%. The reclaim process of acetic acid was implemented by using impulse filling extraction column and a certain extraction solvent. 使用自制络合萃取剂,采用脉冲填料塔通过络合萃取回收糠醛废水中的醋酸,萃取效率可达到97%~99%。