Zhucheng Jifeng Machinery Technology Co., Ltd.

>1. Overview
>With the rapid development of my country's economy, people's living standards continue to improve, and people have higher and higher requirements for the quality of life and living environment. At the same time, rapid development consumes a large amount of resources, resulting in A large amount of waste threatens people's quality of life. Developing the economy to control pollution has become the consensus of modern society. The Party Central Committee and the State Council timely proposed the national development strategy of sustainable development and creating a harmonious society, which has pointed out the direction of our work. direction. As a paper industry, clean production and wastewater treatment have become a trend internationally and will surely become a development trend domestically. It is also an unshirkable responsibility of the paper industry.
>The treatment of papermaking wastewater has been troubled by the papermaking industry for many years due to technical and treatment cost reasons, making it a heavy burden for the papermaking mill. Designing a high-efficiency sewage treatment equipment has become an important issue for the papermaking industry. In line with the common desire of the machinery industry, our company promptly followed the internationally advanced sewage treatment technology and combined with years of experience in wastewater treatment to design and develop dissolved air flotation sewage treatment equipment and its process technology, which completely solved the problem of sewage treatment in paper mills. Many paper mills have used it to prove that this technology is stable and reliable in operation, with good effluent quality, low treatment cost, convenient operation, and easy to master. It has been affirmed and widely praised by users.
>RH series super dissolved air flotation sewage treatment equipment applies a new dissolved air mechanism and designs a novel and unique dissolved air system. Its excellent operating performance and excellent treatment effect have been fully used in industrial wastewater treatment. reflect.
>2. Structure and Principle
>The dissolved air flotation sewage treatment machine is made of steel. Its working principle is: air is sent into the pressure dissolved air tank through a pump, and is forced to dissolve in the air under pressure. In the water, under the condition of sudden release, the air dissolved in the water precipitates, forming a large number of dense micro-bubble groups, which adsorb on the suspended matter during the slow rising process, and the density decreases and floats, achieving the purpose of removing and.
>The structure of the dissolved air flotation sewage treatment machine is mainly composed of the following parts:
> Air flotation machine
> The circular steel structure is the main body and core of the water treatment machine. There are releasers, distributors, sludge pipes, outlet pipes, sludge tanks, scrapers and transmission systems inside. The releaser is placed in the center of the air flotation machine and is a key component for generating microbubbles. The dissolved air water from the dissolved air tank is fully mixed with the wastewater here and is suddenly released, resulting in violent agitation and vortex, forming microbubbles with a diameter of approximately , thereby attaching to the flocs in the wastewater, thereby reducing the rising specific gravity of the flocs, and the clean water is completely separated and evenly distributed. The tapered structure is connected to the releaser. Its main function is to separate the separated clean water and sludge. Evenly distributed in the tank, the outlet pipes are evenly distributed in the lower part of the tank, and are connected to the upper part of the tank through a vertical pipe to overflow. The overflow port has no water level adjustment handle to facilitate the adjustment of the water level in the tank. The sludge pipe is installed at the bottom of the tank. It is used to discharge sediment. There is no sludge tank in the upper part of the tank. There is a scraper on the tank. The scraper rotates continuously to scrape the floating sludge into the sludge tank and flow to the sludge pool.
>, Dissolved air system
>The dissolved air system mainly consists of a dissolved air tank, a gas storage tank, an air compressor, and a high-pressure pump. The dissolved air tank is the most critical part of the system, and its function is to achieve Full contact between water and air accelerates the dissolution of air. It is a sealed pressure-resistant steel tank with baffles and spacers designed inside, which can accelerate the dispersion and mass transfer process of gas and water and improve the efficiency of gas dissolution.
>Medicine tank
>Steel round tanks are used to dissolve and store medicinal liquids. Two of them are dissolving tanks with stirring devices, and the other two are medicinal storage tanks. The volume depends on the processing capacity. And matching.
>3. Process flow description
>Wastewater passes through the grille, blocking larger suspended solids, and enters the sedimentation tank, where wastewater of different properties is mixed and homogenized, and heavy impurities are precipitated. , preventing fluctuations in water quality and ensuring the stable operation of wastewater treatment. Since the wastewater in the pond contains a certain amount of lost fibers, this part of fine fibers is the main source of wastewater. Therefore, recycling it through a microfiltration machine not only recycles It eliminates fiber and greatly reduces the suspended matter in the wastewater, which greatly reduces the processing load for the next process of wastewater air flotation. Coagulation chemicals are added to the conditioning tank to allow the wastewater to be initially separated, flocculated, and precipitated, and then sent to the flotation machine through the sewage pump. Under the action of the flocculant, larger flocs are formed. Due to the capture of a large number of microbubbles and the significant reduction in specific gravity of the flocs, they continue to float. The clean water is completely separated and flows away from the overflow outlet and enters the aerobic fast filter, where the clean water is further oxygenated and filtered and adsorbed through the filter material. The color and part of the sediment are removed, and then the clean water enters the sedimentation and clarification tank, where it is left to settle and clarify. Finally, it flows to the storage tank for reuse or discharge.
>The sludge that floats to the top in the air flotation machine is scraped into the sludge tank through the scraper, and flows to the sludge drying tank. The sludge is pumped into the sludge filter press for pressure filtering. Form a filter cake and transport it to landfill, or mix it with coal and incinerate it. The sewage after filtering returns to the sedimentation tank. If you continue to invest in a cardboard machine, the sludge can also be directly used to produce high-grade cardboard, which not only eliminates secondary pollution, but also creates great economic benefits.