论文部分内容阅读
烟气固碳海水/卤水脱钙是一种可行的环境友好的技术。实验采用氨碱法生产纯碱工艺中排放的白泥为新型碱源,CO_2为沉淀剂,对不同烟道气通量、白泥用量与卤水高度及海水浓度对卤水脱钙率的影响做了研究。结果表明,实验条件下烟道气通量不宜过大,应保持为0.3~0.4 m~3/h;卤水高度对脱钙率影响不大;白泥用量应保证白泥中的镁和卤水中的钙物质的量比大于3∶1,且卤水pH≤9.1;人工海水体系中钙离子初始浓度越高,平衡时脱钙率越高;脱钙过程中卤水的pH不断下降。实验证明,价格低廉、来源广泛的白泥能够作为新型碱源应用于烟道气海水/卤水脱钙过程,且能取得理想的脱钙效果,为经济高效的烟道气海水脱钙新方法提供了数据基础。
Flue gas carbon sequestration / brine decalcification is a viable, environmentally friendly technique. Experiments using ammonia alkali soda ash production process discharged as a new source of alkali, CO_2 as a precipitant, the flue gas flux, the amount of white mud and brine height and seawater concentration on the brine decalcification rate . The results show that under the experimental conditions, the flue gas flux should not be too large and should be maintained at 0.3-0.4 m 3 / h. The height of brine has little effect on the rate of decalcification. The amount of lime must be kept in magnesium and brine Calcium is greater than 3: 1, and the brine pH is less than or equal to 9.1. The higher the initial concentration of calcium ion in artificial seawater system, the higher the decalcification rate at equilibrium, and the lower the pH of brine during decalcification. Experiments show that the low price, wide source of white mud can be used as a new type of alkali source flue gas seawater / brine decalcification process, and can achieve the ideal decalcification effect, cost-effective flue gas seawater decalcification new method The data foundation.