The process of the three effect evaporator for sodium chloride wastewater is an efficient technology for treating high salt wastewater. Its process flow and characteristics can be summarized as follows:
1、 Process flow
one Wastewater pretreatment
Before entering the three effect evaporator, sodium chloride wastewater needs to be pretreated to remove suspended solids, oil, large particle impurities, etc., to ensure the normal operation of the evaporator.
The preprocessing methods mainly include filtration, precipitation, oil removal, etc.
two Wastewater heating
The wastewater is heated to a higher temperature in the first stage of the three effect evaporator to improve evaporation efficiency.
The heating method can be steam heating or electric heating, depending on the actual situation.
three Preliminary evaporation
The heated wastewater enters the first evaporator (first effect evaporator) for preliminary evaporation.
At this stage, most of the water in the wastewater is evaporated, while the salt content is concentrated.
four Salt crystallization
After initial evaporation, the wastewater enters the second evaporator (second effect evaporator) for further evaporation.
At this stage, the salt in the wastewater begins to crystallize and form solid particles.
five Crystallization Separation
The wastewater in the second evaporator undergoes crystallization separation, separating solid particles (sodium chloride crystals) from the liquid.
Crystallization can be further processed, such as drying, packaging, etc., while liquid can continue to undergo evaporation treatment.
six Final evaporation
The wastewater enters the third evaporator (triple effect evaporator) for final evaporation treatment.
At this stage, the remaining moisture in the wastewater is evaporated, resulting in high-quality distilled water or further concentrated saltwater.
seven Condensed water treatment
Distilled water or concentrated saltwater can be further treated with condensed water to remove impurities and salts (for distilled water), resulting in purer water.
The processing methods include filtration, ion exchange, etc.
eight Wastewater discharge or reuse
The treated wastewater can meet the discharge standards or be reused.
If wastewater is reused, its water quality needs to be monitored and controlled to ensure that it does not have an impact on the environment or human health.
2、 Process Features
one Efficient: The three effect evaporator, through the series operation of multi-stage evaporators, can efficiently treat saline wastewater, achieving reduction, resource utilization, and harmless treatment of wastewater.
two Energy saving
This process adopts efficient heating methods and energy recovery technology, which can reduce energy consumption.
Multi effect evaporators utilize the cascade effect of heat, causing the negative pressure of wastewater to increase in each evaporator while the evaporation temperature gradually decreases, thereby reducing energy consumption.
three Environmental Protection: The treated wastewater can meet national discharge standards or higher water quality standards, making it environmentally friendly.
four High degree of automation: This process adopts a PLC control system, which can achieve automatic control and monitoring, reducing the workload of operators.
five Easy to operate: The entire process design is reasonable, the operation is simple, and it is easy to maintain and manage.
The process of the three effect evaporator for sodium chloride wastewater has the advantages of high efficiency, energy saving, environmental protection, high degree of automation, and easy operation, making it an ideal high salt wastewater treatment technology. Baihuipu Environmental Protection has a technical team of over 100 people, constantly researching and updating sewage treatment technologies. It can easily solve sewage problems such as metalworking, electroplating and grinding, food and medical care, leachate, and zero discharge.
