一种高效节能降耗的碳碱法制造硼砂新工艺  

A new process of producing borax by CO_2-soda method with high efficiency,energy saving,and consumption reduction

作　　者：胡德生[1] 逯双佳[1] 仲剑初[1] 

机构地区：[1]大连理工大学精细化工国家重点实验室化工学院材料化工系,辽宁大连116024

出　　处：《无机盐工业》2011年第11期40-42,共3页Inorganic Chemicals Industry

摘　　要：通过对现行的碳碱法制硼砂的工艺过程进行分析,提出碳解过程可分为反应初期、主反应期和反应末期3个阶段。反应初期和末期吸收速率大于反应速率;主反应期开始吸收速率大于反应速率,后期二者相当。针对反应过程的特点,提出了改进碳解反应的核心是提高碳解的二氧化碳压力和适当提高温度,并对现行工艺进行了改进。改进后的工艺技术指标为:硼矿碳解率90%、碳解时间9 h、二氧化碳利用率大于96%、蒸汽消耗(以1 t硼砂计)1 292 kg。改进后的碳碱法工艺与原工艺比,反应时间缩短了1/2,能耗显著减少,二氧化碳减排效果明显,有助于提高环境质量。According to the analysis on the production of borax by CO2-soda process,the reaction in this process can be divided into three parts：initial,main,and final reaction stages.The adsorption rate is faster than the reaction rates in the initial-and final-reaction stages,while the adsorption rate is first faster than reaction rate and then gradually become the same in the main reaction stage.Based on these characters of this process,the measurements for raising CO2 partial pressure and reaction temperature were made to improve this process.The suitable process conditions were as follows：the carbonate decomposing rate for B2O3 in ascharite was 90%,reaction time was 9 h,CO2 recovery rate was more than 96% and steam consumption was 1 292 kg（1 t borax）.Compared with old process,the reaction time of new process has been shorted to half one of old process and energy consumption has also been reduced significantly.The new process can reduce CO2 emission and improve environmental quality.

关 键 词：碳碱法 硼砂 碳解率 

分 类 号：TQ128.1[化学工程—无机化工]