METHOD AND EQUIPMENT FOR TREATMENT OF A LIQUID FLOW TO BE CLEANED AND PASSED INTO A FLOTATION PLANT OR EQUIVALENT

摘要

The invention concerns a method and an equipment for treatment of a liquid flow (A) to be cleaned and passed into a flotation plant or equivalent. In the method, a part of the liquid flow (A) to be cleaned that flows along the flow line (11), or cleaned liquid coming from the outlet of the flotation plant, is passed along a first branch line (12) as a liquid flow (a1) into a pump (15). The suction capacity of the pump (15) is regulated so that the pump (15) sucks gas as a flow (B), the gas (B) that has been sucked into the pump (15) being mixed with the liquid flow (a1) flowing in the first branch line (12), and further mixing of the gas and liquid take place in the discharge pipe (16) of the pump (15). The mixed flow (e) of gas and liquid is passed along the discharge pipe (16) of the pump (15) into a mixing part (17), where the discharge pipe (16) of the pump (15) ends in a pressure release (21). The rest of the liquid flow (A) to be cleaned is passed along a second branch line (18) as a liquid flow (a2) into the mixing part (17), where the liquid flow (a2) flowing along the second branch line (18) is mixed with the liquid flow (e) flowing in the discharge pipe (16) of the pump (15), in which case, in the mixing part (17), out of the flow (K) that is discharged from the pressure release (21), the gas bubbles in the liquid flow (K) that contains dissolved gas (B) are released. The liquid flow (K) discharged from the mixing part (17) is passed as a flow (f) along a mixing duct (22) into the flow line (11) of the liquid flow (A) to be cleaned and further as a flow (C) into the flotation plant or equivalent.