What is delivered today is a set of flotation machine equipment for sewage treatment in Paper mill!
Paper wastewater treatment equipment-Dissolved Air Flotation Machine refers to equipment that reduces the SS and COD in wastewater generated by the paper industry, with the aim of reducing pollution hazards.
The paper industry is one of the industries with high energy consumption and serious environmental pollution. The environmental pollution caused by it is characterized by a large amount of wastewater discharge, high Biochemical oxygen demand (BOD), and a lot of fiber suspended solids in the wastewater, which mainly contains Hemicellulose, lignin, Mineral acid salts, fine fibers, inorganic fillers, printing ink, dyes, and wastewater and waste gas containing divalent sulfur, with a foul smell and color. Lignin and Hemicellulose mainly form COD and BOD of wastewater; Small fibers, inorganic fillers, etc. need to form SS; Ink, dyes, etc. mainly form chromaticity and COD. These pollutants comprehensively reflect the high SS and COD indicators of wastewater.
The papermaking wastewater treatment equipment-Dissolved Air Flotation Machine can minimize the SS and COD in wastewater with the help of chemical flocculants. In the papermaking industry, this equipment can be used for the treatment of paper machine white water and intermediate wastewater such as deinking wastewater. On the one hand, it can recover fibers, and on the other hand, it can reuse or discharge the treated wastewater to meet the standards, greatly reducing the pressure on environmental protection. This equipment is designed according to popular prototypes in the United States, with advanced technology, simple structure, and convenient maintenance
The horizontal flow Dissolved Air Flotation Machine is a commonly used solid-liquid separation equipment in the sewage treatment industry, which can effectively remove suspended solids, grease, and gum substances in sewage. It is the main equipment for early sewage treatment.
1、 Structural features of Dissolved Air Flotation Machine: The main body of the equipment is a rectangular steel structure. The main components are composed of a dissolved air pump, air compressor, dissolved air tank, rectangular box, air flotation system, mud scraping system, etc.
1）. The gas tank produces small bubbles with a particle size of 20-40um, and the adhesive flocculent is firm, which can achieve good air flotation effect;
2）. Less use of flocculants and reduced costs;
3）. The operating procedures are easy to master, the water quality and quantity are easy to control, and the management is simple;
4）. Equipped with a backwash system, the release device is not easily blocked.
2、 Working principle of Dissolved Air Flotation Machine: The gas tank produces dissolved water, which is released into the water to be treated through a depressurization device. The air dissolved in water is released from the water, forming tiny bubbles of 20-40um. The micro bubbles combine with the suspended solids in the sewage, making the specific gravity of the suspended solids smaller than that of water and gradually floating to the surface to form scum. There is a scraper system on the water surface to scrape the scum into the sludge tank. Clear water enters the clean water tank through the overflow channel from the bottom.
3、 Scope of use of Dissolved Air Flotation Machine:
1) Used to remove solid suspended solids, fats, and various colloidal substances in wastewater, such as wastewater treatment in industrial enterprises such as petrochemical, coal mining, papermaking, printing and dyeing, slaughtering, and brewing;
2). Used for recycling useful substances, such as the collection of fine fibers in papermaking white water.
Post time: Jul-21-2023