Waste salt fly ash resourceful treatment process

• Main Authors: YANG JIHENG, BAI ZUGUO, ZHANG JIANSONG, WANG PENG, DANG JIANBING, CHEN DAOKANG, FAN KEYIN, SUN GUIHUA, ZHOU MING, YUN JIANJUN, ZHANG HUIQIN, PENG WENBO
• Format: Patent
• Language: Chinese; English
• Published: 17.02.2023
• Subjects: DISPOSAL OF SOLID WASTE; PERFORMING OPERATIONS; RECLAMATION OF CONTAMINED SOIL SOIL; TRANSPORTING

The invention discloses a waste salt incineration fly ash resourceful treatment process which comprises the following steps: step 1, adding water into fly ash generated by waste salt incineration to completely dissolve sodium chloride; step 2, carrying out filter pressing treatment on the solution obtained in the step 1; 3, NaOH and Na2CO3 are added into the filtrate obtained in the step 2, so that divalent or higher metal ions are precipitated; step 4, filtering the solution obtained in the step 3 through a ceramic membrane to remove precipitates; and step 5, concentrating and crystallizing the filtrate of the ceramic membrane in the step 4 to obtain sodium chloride solid salt. By adopting the process and the device provided by the invention, resource utilization of the waste salt in the fly ash can be realized, and high-quality industrial solid salt is generated. 本发明公开了一种废盐焚烧飞灰资源化处理工艺，包括如下步骤：步骤1，废盐焚烧产生的飞灰加水，使氯化钠全部溶解；步骤2，将步骤1中得到的溶液进行压滤处理；步骤3，在步骤2中获得的滤液中加入NaOH和Na2CO3，使二价及以上的金属离子沉淀；步骤4，通过陶瓷膜对步骤3中得到的溶液进行过滤除沉淀；步