Ammonium sulfate wastewater treatment of a printing and dyeing factory in Tongxiang, Zhejian
Ammonium sulfate evaporation project
The ammonium sulfate material has a lower boiling point temperature and its saturated solution is the same. It is suitable for MVR evaporation crystallization, and the ammonium sulfate material salt crystal has high economic efficiency. In the evaporation crystallization process, it is necessary to pay attention to the partial ammonia vapor volatilization, which causes the system material PH to drop. At the same time, it is necessary to determine the corrosion problem of chloride ions in the material. For ammonium sulfate materials containing a small amount of chloride ions, it is recommended to use 2205/316L material; for ammonium sulfate materials without chloride ions, 316L material can be used, but pay attention to the change of PH.
Characteristics of evaporation of ammonium sulfate materials:
1. The condensed water has a high pH and is alkaline;
2. A small amount of ammonia vapor evaporated during the process, and the mother liquor gradually becomes acidic;
3. Non-condensable gas have odor smell.
Project
|
No |
Item |
Introduction |
|
1 |
Name |
Treatment of a printing and dyeing wastewater ammonium sulfate wastewater in Tongxiang, Zhejiang |
|
2 |
Address |
Zhejiang |
|
3 |
Treatment of wastewater industry |
Concentrated water after printing and dyeing ammonia removal film |
|
4 |
Capacity |
1.8Ton/hour |
|
5 |
Process Technology |
Raw water - deamination membrane - deamination membrane concentrated water MVR evaporation concentration - crystallization system |
|
6 |
Process introduction |
The project is the evaporation and crystallization of the printing and dyeing wastewater which is treated first by demineralized membrane. Due to the effect of the pH of the deaminating membrane working condition, the material PH is low. Considering the factors of anti-corrosion of the equipment, the pH adjustment is carried out before entering the evaporator.The PH should reach to 5-6 before evaporation and crystallization. |
