| abstract |
The invention relates to the field of waste treatment, and the invention discloses a method for recycling sodium chloride and sodium sulfate mixed waste salt, including the steps of co-processing, dissolving treatment, nanofiltration membrane filtration and evaporative crystallization; the method of the invention Not only can the sodium sulfate salt body be recycled, but also the organic matter contained in the waste salt can be fully used to burn and generate heat to supply energy for the cement kiln, so as to achieve the purpose of full resource utilization; the invention can reduce the amount of water used in the process and reduce evaporation. The energy consumption in the crystallization process saves the processing cost; the method of the invention makes full use of the heat generation of the cement kiln to decompose the organic matter in the waste salt, and then the volatile organic matter produced by the decomposed organic matter is mixed with the flue gas and the air and then enters the cement kiln for full combustion. , to provide heat for the cement kiln, complete combustion, harmless emission, and achieve the purpose of green treatment. |