碳化气浓度渐降模式对纳米碳酸钙碳化过程的影响研究  

Influence of carbonization gas concentration gradual reduction mode on carbonization process of nano CaCO_3

作　　者：颜鑫[1] 卢云峰 YAN Xin;LU Yun-feng(School of Chemical Engineering, Hunan Chemical Vocational College, Zhuzhou 412004, China;Shijiazhuang Colin Weir Environmental Protection Technology Co., Ltd., Shijiazhuang 050000, China)

机构地区：[1]湖南化工职业技术学院化学工程学院,湖南株洲412004 [2]石家庄科林威尔环保科技有限公司,河北石家庄050000

出　　处：《现代化工》2018年第9期180-183,共4页Modern Chemical Industry

基　　金：湖南省科技厅专项课题(2014GK4010)

摘　　要：设计了碳化活化一体化装置,具有碳化和活化温度可调、CO_2浓度可控、CO_2分布均匀、碳化无死角、搅拌速度可调、晶体形状可控、可简化生产流程,减少设备数量等特点,可避免浆液的静置、陈化、冷却、增浓等工艺环节,提高了工艺的连续性,有利于节能降耗和提高产品质量稳定性。在碳化起始浆液质量分数、起始温度、制冷机功率、碳化气流量或压力等因素都相同的前提下,当碳化气体积分数分别采用35%、99%,以及从99%渐降到20%等3种模式时,探讨了碳化过程中氢氧化钙浆液浓度变化规律与碳化气体积分数、碳化时间和碳化温度的关系,其中碳化气浓度渐降模式最为理想。An integrated device combining carbonization with activation is designed,with characteristics such as adjustable carbonization and activation temperatures,controllable carbon dioxide concentration,evenly distribution of carbon dioxide,carbonization without blind point,adjustable stirring speed,particle size,controllable crystal shape,simplified process and fewer number of equipment. It cancels some technological links such as slurry static,maturing,cooling,thickening and others,improves the continuity of the process and is conducive to saving energy,reducing consumption and improving product quality and stability.In the premise of remaining unchanged in initial carbide slurry concentration,initial carbonization temperature,refrigeration power,carbonization gas flow or pressure and other factors,the influences of the changes of calcium hydroxide concentration on carbonization gas concentration,carbonization time and carbonization temperature are explored in the carbonization process when carbonization gas concentration is respectively in three modes of 35%,99%,and reducing 99% to 20% gradually. It is found that the gradual reduction mode of carbonization gas gives the best effect.

关 键 词：纳米碳酸钙 碳化活化一体化装置 CO2缓冲罐 气体分布器 浓度渐降模式 

分 类 号：TQ132.3[化学工程—无机化工]