5results about How to "Increase surface load" patented technology

The invention discloses a method and system for efficient fluorine removal by using sulfate and phosphate in combination, belonging to the field of water treatment technology. When fluorine-containing wastewater flows through a primary reaction tank and a primary sedimentation tank, a control system accurately controls the amount of sulfate added, and the sulfate is fully mixed in a pipeline mixer. After entering the primary reaction tank, calcium ions, fluoride ions and sulfate ions in the water react together, so that sulfate is doped in calcium fluoride particles, and calcium fluoride quickly agglomerates and sinks, so that the area of ​​the sedimentation tank is reduced by half of the original area. In order to achieve the purpose of deep fluorine removal, phosphate and calcium salt are added to the secondary defluorination system to generate more insoluble precipitates with fluoride ions, so that the fluoride ion concentration of the effluent water is reduced by less than 1 mg / L. The invention not only has a simple process flow and high automation, but also because the addition of sulfate promotes precipitation, the area of ​​the sedimentation tank is reduced, saving costs, and at the same time, because the addition of phosphate generates more insoluble precipitates, fluorine can be removed efficiently.

The utility model discloses an efficient cooling crystallizer which comprises a crystallizer body, a central pipe is arranged at the top of the crystallizer body, the top end of the central pipe is connected with a circulating reflux inlet and a port at the top of a circulating return pipe, a feeding pipe is arranged at the top of the circulating reflux pipe, and the bottom of the central pipe extends into a product settling zone. The scraper is arranged at the bottom of the product settling zone, the salt collecting hopper is arranged below the product settling zone, the inclined plate clarifying zone is arranged above the product settling zone, an overflow tank is arranged on the outer side of the inclined plate clarifying zone, the top of the overflow tank is connected with a clear liquid outlet, and the clear liquid outlet is connected with a bottom port of the circulating return pipe; the middle part of the circulating return pipe is arranged in the cooler, so that low-temperature efficient crystallization can be realized; the flow sectional area can be effectively reduced, the height of a clarification area is reduced, and the investment cost of the crystallizer is reduced; and adverse effects on production caused by salt collection at the bottom of the crystallizer can be effectively reduced.

The utility model discloses efficient precipitation integrated equipment for treating industrial wastewater. The efficient precipitation integrated equipment comprises a coagulation zone, a flocculation zone, a transition zone, a precipitation zone, a water outlet device and a sludge discharge system, a water inlet pipe is arranged at the upper part of the coagulation area and is connected with a coagulation dosing pipe; a central cylinder is arranged in the middle of the flocculation area, a flocculation dosing pipe is arranged at the top of the central cylinder, the bottom of the coagulation area is communicated with the bottom of the central cylinder, the top of the central cylinder is communicated with the flocculation area, the bottom of the flocculation area is communicated with the bottom of the transition area, the transition area is separated from the sedimentation area through a baffle, and the sedimentation area is communicated with the bottom of the coagulation area. The top of the baffle is provided with a notch communicating the transition area and the settling area. The efficient precipitation integrated equipment for treating industrial wastewater has the advantages of small occupied area, high treatment efficiency, good effect, small dosage and stable operation.

The present invention relates to a radial flow type peripheral inlet and outlet secondary sedimentation tank with an additional intermediate water outlet. The peripheral water distribution system is used to introduce muddy water into the tank body from the periphery of the tank body. The peripheral water outlet system is used to discharge the clean water obtained after the muddy water is precipitated from the tank body from the periphery of the tank body. The intermediate water outlet system is used to discharge the clean water obtained after the muddy water is precipitated from the tank body into the peripheral water outlet system from the middle area of ​​the tank body. After the muddy water enters the tank body, it is discharged from the tank body after settling along the first path or the second path according to its specific gravity. The first path is that the muddy water flows through the peripheral radial flow area and settles, and the clean water formed is discharged into the peripheral water outlet system. The second path is that the muddy water flows through the peripheral radial flow area and the intermediate radial flow area in turn and settles, and the clean water formed is merged into the intermediate water outlet system and then discharged into the peripheral water outlet system. The muddy water with a lighter specific gravity flows from the peripheral radial flow area to the intermediate radial flow area for sedimentation and the clean water formed by the sedimentation is discharged into the intermediate water outlet system. The intermediate water outlet system can also alleviate the interference of external wind.

This invention belongs to the field of dissolved air flotation, specifically a microbubble dissolved air flotation device. Addressing the problems of existing devices failing to efficiently generate a large number of nanoscale microbubbles, and the resulting bubbles having short residence times in water and relatively low surface loading, leading to low adhesion efficiency of suspended solids and affecting turbidity removal efficiency and purification effect, the following solution is proposed. It includes a tank body, within which a stirring mechanism is installed in the reaction zone to agitate the water and aid flocculation. A dissolved air assembly is installed within the dissolved air tank body to generate microbubbles that adhere to suspended solids in the flocculated water within the dissolved air tank. In this invention, the dissolved air assembly efficiently generates a large number of nanoscale microbubbles. These microbubbles have longer residence times in water, higher surface loading, and can quickly adhere to the flocculated suspended solids, promoting their flotation and separation, thereby significantly improving the turbidity removal efficiency and purification effect of water treatment.