Flame retardant will produce a large amount of wastewater in the production process, which needs to be treated.
1. Flame retardant wastewater treatment process
Flame retardants will produce a large amount of wastewater in the production process, which is generally treated by the three-effect evaporation treatment device, which is an extraction and concentration equipment, which is mainly composed of three groups of evaporators, condensers, salt separators and auxiliary equipment in series with each other.
When the existing phosphorus-containing flame retardant wastewater is evaporated and treated in the treatment process, the crystallization of phosphorus-containing flame retardant wastewater is generally discharged through the discharge port of evaporation processor, but when the crystallization of phosphorus-containing flame retardant wastewater is more, these crystals can be attached to the discharge port of evaporation processor, accumulate for a long time, easily block the discharge port of evaporation processor, affect the operation of evaporation processor.
2. Three-effect evaporator for flame retardant wastewater treatment
The three-effect evaporator used for phosphorus flame retardant wastewater treatment is a chemical equipment, including the first effect evaporator, the second effect evaporator, the third effect evaporator, the plate preheater, the exhaust steam preheater, the thickener and the centrifuge;
The three-effect evaporator can make full use of steam heat energy, which solves the problems of low salt concentration, large energy consumption and phosphorus content that is difficult to biochemically treat in the wastewater treatment process of phosphorus-containing flame retardant wastewater.
3. Improvement process of three-effect evaporator for flame retardant wastewater treatment
In the treatment process of the existing phosphorus-containing flame retardant wastewater, when the phosphorus-containing flame retardant wastewater is evaporated, the crystals of the phosphorus-containing flame retardant wastewater are generally discharged through the discharge port of the evaporation processor, but when the crystals of the phosphorus-containing flame retardant wastewater are more, these crystals can be attached to the discharge port of the evaporation processor, accumulate for a long time, easily block the discharge port of the evaporation processor, and affect the operation of the evaporation processor.
Through the setting of the circulating drive pump, when the phosphorus-based flame retardant wastewater vapor enters the third-effect processor for treatment, the phosphorus-based flame retardant wastewater is evaporated and enters the inside of the replacement part through the third-effect processor at this moment, the replacement part realizes the preheating of the second-effect processor at this moment, then the circulating drive pump is opened, and the phosphorus-based flame retardant wastewater vapor that the heat inside the replacement part is completed by the circulating drive pump is discharged through the outlet pipe, and the preheating of the second-effect processor is realized, the waste of resources is reduced, and the production cost is reduced.
The improved three-effect evaporator treats the flame retardant wastewater, avoids the crystallization accumulation of phosphorus-based flame retardant wastewater, ensures the stable operation of the entire evaporation processor, improves the evaporation efficiency of phosphorus-based flame retardant wastewater, improves the treatment quality of phosphorus-based flame retardant wastewater, realizes the preheating of the second-effect processor, reduces the waste of resources, and reduces the production cost.