Before starting the machine, add lime powder or alkali flakes into the sewage tank, and then turn on the sewage pump in the air flotation machine to fully mix the lime powder or alkali flakes with the sewage. At this time, you need to use acid-base test paper to test the pH of the sewage. A value of 8-9 is better.
After mixing the two medicines, continue to add polyaluminum chloride and stir; and polyacrylamide to the sewage and stir. It should be noted that the dosage of various chemicals in the sewage tank is changed at any time according to the cleanliness and experience of the sewage, and the basic principle is that the effluent is clear and transparent.
Then turn on the main switch of the electric control cabinet of the air flotation machine, and check the normality of each electrical component; the lubrication of each stirring motor and water pump, etc., add appropriate lubricating oil according to the actual situation. After all these preparations are completed, the air flotation machine can be turned on.
The opening sequence starts from the high-pressure pump, followed by the water inlet valve and the water outlet valve. After the high-pressure pump operates normally, slowly close the water outlet valve; and observe the pressure gauge at any time. After the air flotation machine has been operated for many times, there is no need to adjust the inlet and outlet valves, just turn on the high-pressure pump.
After the high-pressure pump is turned on, it needs to run normally for a period of time. When milky white liquid appears in the air flotation tank, the sewage pump is turned on, and the dosing pump for polyaluminum chloride and polyacrylamide is turned on at the same time, and then the motor switch of the mechanical filter tank is turned on. After its treatment, clean water can be obtained and gradually enter the clean water pool.
