What precautions does the air flotation machine have when dealing with dye wastewater

Because of its good effect, less investment and convenient operation and management methods, the air flotation machine has been more and more widely used in solving printing and dyeing wastewater in printing and dyeing plants. The air flotation method is based on the fact that a large number of micro bubbles are generated by the equipment, and coagulants are added to make the inclined plate sedimentation tank of fine particles stick to the micro bubbles in the wastewater. With the help of the buoyancy of water, the micro bubbles are removed according to the slag scraper to achieve the effect of solid-liquid separation, and the sewage treatment equipment is used for treatment.
For wastewater treatment, the air floatation machine has a good solution effect, but if you want to achieve a good practical solution effect, first of all, a large amount of steam must be partially sucked into the liquid by the submersible aerator. Therefore, measuring the air volume required in the process of the air floatation machine and improving the adhesion between bubbles and flocs are all to be dealt with in the construction engineering design.
Bubbles and flocs have certain hydrophobicity, and tend to attract each other to reduce their respective surfaces. Under certain hydraulic standards, microbubbles and flocs with mechanical energy have soft collisions. When the shrinkage water in the bubble adhesive layer meets the floc drain pipe, it will adhere. The greater the collision frequency, the stronger the adhesion strength.
When the micro bubbles with large mechanical energy collide with the floc structural grooves, during the process of being wrapped, flocs or flocs impacting and forming large flocs, the flocs randomly grabbed or adhered to the bubbles will become foam containing and floc compressed due to the large bridge formation of the absorption railway, so that the bubbles and flocs will adhere, and the flocs will be driven up by the bubbles. Due to the change of the direction of the rate gradient, the copolymers increased again during the upregulation process.
In order to improve the actual effect of adhesion, several types of coagulant aids can be selected for dosing. As each coagulant aid is a different organic chemical base, it can play a connecting role in water quality and make full use of their respective advantages. According to the same natural environment standard, if the pH value of sewage with the same dye and color is different, the effect of solving practical problems will be very different.
Experiments show that when pH=7, the total number of micro bubbles in the volume of the air flotation machine is more, and the average particle size is smaller, so the effect of solving the problem is very good; When pH>7, the number of micro bubbles decreases and the particle size increases; PH<7, the total number of smaller micro bubbles is less, the particle size is larger, and the actual effect of solving the problem is poor. Therefore, suitable coagulant aids can be found in the sewage to ensure that the flotation machine can solve the ideal pH value and improve the quality of water.