The invention discloses a micro-bubble generator for air floatation treatment of
sewage. The micro-bubble generator comprises a water cavity
pipe and a micropore
pipe; one end of the water cavity
pipe is connected with the micropore pipe, and the other end of the water cavity pipe is a closed end; the side wall of the water cavity pipe is provided with an inlet
water pipe; an
air cavity pipe is sleeved outside the micropore pipe, and a closed
air cavity is formed between the
air cavity pipe and the micropore pipe; the side wall of the air cavity pipe is provided with an inlet air pipe; and an opening end of the micropore pipe is connected with an outlet pipe. When the micro-bubble generator is in use, the treatment water and the treatment air respectively enter the water cavity pipe and the air cavity pipe of the micro-bubble generator through the inlet
water pipe and the inlet air pipe, micro bubbles can be formed by
cutting the air through the micropore pipe and continuous scouring and shearing the air through the treatment
water flow, and the formed micro bubbles are carried by the
water flow to be discharged through the outlet pipe. Due to the adoption of the micro-bubble generator, sufficient micro bubbles with a
uniform size can be effectively generated, and the requirement of the air floatation purification process can be completely met; and the trouble for clearing the foreign matters in the treatment water blocking the micropore pipe can be avoided, the micro-bubble generator can be operated stably for a long time, no rotating part exists, and simplicity in use, installation, maintenance and repairing can be realized.