The working principle of water purification equipment is mainly purification through precipitation, filtration and disinfection.
The installation of water purification equipment is basically consistent with the purification process of urban water supply plant. It comprises a coagulation tank, a sedimentation tank, a filtration tank, a water quality stabilizing device, a backwashing device, a water pump and an electrical control cabinet. They are introduced as follows:
1. Coagulation pond: Raw water added with coagulant enters the coagulation pond through a water inlet pipe, and is stirred by a special stirrer, so that the suspended substances in the water fully contact with the coagulant to form alum flower. Water purification devices generally use vortex reaction to mix water and coagulant, but the effect is unstable due to the change of water quantity. The water purification device is stirred by a blender, and the effect is not affected by the change of water quantity.
2. Sedimentation tank: water is coagulated with coagulant to form alum flower, which flows into the sedimentation tank of the equipment for sedimentation. The sedimentation tank adopts inclined tube sedimentation method, and the solid-liquid separation is completed by sedimentation in the trapezoidal inclined plate sedimentation chamber, and the precipitated sludge is discharged into the mud hopper.
3. Filter pool: the precipitated water flows through the filter pool for filtration. The structure of the filter tank is: water distribution pipe at the bottom, quartz sand in the middle and anthracite at the top. The filtration rate is 10m/h, and then the clean water flows into the clean water pool for disinfection and drinking. The backwashing period of the filter is about 12 hour, and the backwashing time is 5- 10 minute.
4. Water purification equipment is suitable for water purification of water supply projects with surface water as water source, such as rivers, lakes, reservoirs, reclaimed water reuse, coal mine tailings water purification, coal washing water, baths, swimming pools, car washing, paper making, printing and dyeing, electroplating and other industrial wastewater.