Description
Process Flow 1: The hot spring water is filtered through a PP cotton precision filter, then enters two series-connected resin arsenic removal tanks. A regenerable resin with high adsorption capacity for arsenic compounds is used. After passing through the two series-connected resin arsenic removal tanks, the arsenic content in the hot spring water is ≤0.05 mg/L.
Process Flow 2: The resin is regenerated using 10% NaOH (NaOH + NaCl mixed solution). The regeneration cycle is 5-10 days, and each regeneration takes 50-70 minutes. The regeneration time is determined by measuring the arsenic saturation of the resin in the arsenic removal tank or when the arsenic content in the effluent from the arsenic removal tank exceeds the limit.
Process Flow 3: The backwash wastewater from the resin arsenic removal tank enters the "regeneration liquid collection and sedimentation tank." Ferric chloride, alkali, and PAM are added to the tank to precipitate the arsenic compounds. Then, a diaphragm pump and plate-and-frame filter press are used to separate the solid arsenic compounds from the wastewater.
Process Flow 4: The solid arsenic compounds are packaged for disposal. The wastewater enters the wastewater collection pool, and then is pumped through a quartz sand filter and a KL filter for further arsenic removal, ensuring the wastewater meets discharge standards (arsenic content ≤0.3 mg/L), before being discharged into the sewage network.
Process Flow 5: The backwash wastewater from the quartz sand filter and KL filter enters the "wastewater collection and sedimentation tank," and then repeats process flows three and four.
Process Flow 2: The resin is regenerated using 10% NaOH (NaOH + NaCl mixed solution). The regeneration cycle is 5-10 days, and each regeneration takes 50-70 minutes. The regeneration time is determined by measuring the arsenic saturation of the resin in the arsenic removal tank or when the arsenic content in the effluent from the arsenic removal tank exceeds the limit.
Process Flow 3: The backwash wastewater from the resin arsenic removal tank enters the "regeneration liquid collection and sedimentation tank." Ferric chloride, alkali, and PAM are added to the tank to precipitate the arsenic compounds. Then, a diaphragm pump and plate-and-frame filter press are used to separate the solid arsenic compounds from the wastewater.
Process Flow 4: The solid arsenic compounds are packaged for disposal. The wastewater enters the wastewater collection pool, and then is pumped through a quartz sand filter and a KL filter for further arsenic removal, ensuring the wastewater meets discharge standards (arsenic content ≤0.3 mg/L), before being discharged into the sewage network.
Process Flow 5: The backwash wastewater from the quartz sand filter and KL filter enters the "wastewater collection and sedimentation tank," and then repeats process flows three and four.