Address: Chenjia village, Dashiqiao, Yingkou, Liaoning
1 design principle
Fused magnesia adopts mature and reliable coagulation and sedimentation treatment technology to ensure that all the indexes of treated water meet the first-class discharge standard GB8978-1996 of the National Comprehensive Sewage Discharge Standard. When designing, we should give full consideration to the measures of vibration reduction and noise reduction of the matching equipment, so as to avoid two pollution.
2 process flow
The solid content of the slurry discharged from the desulfurization tower is 15%, and the main solid component is sub Magnesium Sulfate. The slurry must be dehydrated before further processing can get the required by-products. In this project, the dehydration system includes dehydration supply tank, dehydration supply pump, centrifugal dehydrator, dryer and other related equipment.
The desulfurization slurry in the desulfurization tower is discharged through the slurry and pumped to the dehydration supply tank. The concentrated desulfurization by-products are then transported to the hot air dryer by a screw conveyor through a centrifugal dehydrator. The by-products with a moisture content of about 10% at the outlet of the dryer are stored in a one-layer by-products warehouse. The wastewater generated by the whole process enters the treatment system and is discharged after reaching the standard. The process of desulfurization wastewater treatment in this project is neutralization, sedimentation, flocculation and clarification.
Neutralization: The acidic wastewater from flue gas desulfurization (FGD) is elevated from the wastewater pump of cyclone separator to the neutralization tank. The pH regulating system is set up in the neutralization tank. The dosage of lime milk is controlled by the control valve and the frequency converter to maintain the pH value (8.8-9.0) of the wastewater in the neutralization tank. At this time, a large number of heavy metal ions (such as Zn2+, M) in the original wastewater are added. In order to mix the wastewater evenly in the neutralization tank, a stirring motor was set up.