47results about How to "To achieve the purpose of purifying sewage" patented technology

The invention discloses a flotation swirl coupling and separation method for oily sewage, which utilizes the special stirring function of the vortex pump to make the vortex pump absorb water (oily sewage) while sucking air, stir and mix the sewage and gas, and pressurize to ≥ 0.20MPa, and then pumped into the deoiling cyclone with a special structure. Due to the sudden drop in pressure, a large number of fine air bubbles are released quickly. In the centrifugal force field of the swirl, the air bubbles and tiny oil droplets automatically adhere to the Together; since the density of oil droplets and air bubble adherents is much lower than that of the oil phase, this increases the density difference between the oil phase and the water phase, which makes it impossible to use ordinary deoiling cyclones. The separated tiny oil droplets can be separated by a flotation cyclone combination device, and the purification rate can reach more than 99%. The method of the invention can be widely applied to the liquid / liquid separation of oily sewage, saturated water with oil and other heterogeneous systems in the fields of oil refining and chemical industry.

The invention discloses an integrated rainwater system for a sponge city and a construction method of the rainwater system. The rainwater system comprises a middle green belt and water storage tanks, wherein the middle green belt comprises a vegetation planting area and a rainwater infiltration area; a concrete course is arranged at the lower end of the rainwater infiltration area; a rainwater pipe is arranged at the lower end of the concrete course, and the rainwater pipe is connected to the water storage tanks; water pumping pipes are connected from the interiors of the water storage tanks; bidirectional nozzles are arranged at the other ends of the water pumping pipes; and water pumps are connected to the water pumping pipes. In accordance with the shortcomings of the prior art and the characteristics of the sponge city, the rainwater system, which integrates water seepage, water storage, water purification and utilization, is designed, and the construction method of the rainwater system is correspondingly designed; by promoting the water seepage with the adoption of vegetation, the problem of road water-logging is solved through slow discharge and controlled release; and in addition, some impurities in the rainwater are separated on the basis of the purification capacity of the vegetation, and the rainwater is stored in the water storage tanks and is used for spraying roads and watering the vegetation in dry season, so that adverse effect caused by drought and flood seasons can be effectively relieved.

The invention provides a preparation method of nano titanium dioxide thin film materials loaded on the surface of a ceramic body. The preparation method comprises the following steps of: adding the organic titanium salt to the de-ionized water and stirring the de-ionized water and adding alkali liquor to adjust the pH value to be 6 to 8; centrifuging for separating the mixed solution, and adding the separated slurry to the mixed solution of absolute ethyl alcohol and acetylacetone; adding the dispersing agent to the mixed solution, sufficiently and uniformly stirring the mixed solution till the stable titanium dioxide sol is formed; soaking the high-temperature resistance and corrosion resistance ceramic body into the titanium dioxide sol, drying and forging the ceramic body for 2 to 4 hours to form one layer of nano titanium dioxide thin film material on the surface of the ceramic body. The thin film is distributed uniformly, and the thickness of the thin film is controllable. When being applied to treating the industrial waste water, the ceramic body loaded with nano titanium dioxide thin film can be utilized repeatedly and has low cost and no secondary pollution.

The invention relates to the technical field of preparation of sewage treatment agents, in particular to a solid waste-based porous sewage treatment agent and its preparation method and application. In parts by weight, the raw material composition of the solid waste-based porous sewage treatment agent includes the following components: 20-60 parts of red mud, 30-50 parts of mineral powder, 10-30 parts of fly ash, 10-30 parts of steel slag, zeolite 8-10 parts; foaming agent 6-8 parts, activator 4-6 parts, foam stabilizer 6-8 parts. The technical scheme of the invention uses red mud, mineral powder, fly ash and steel slag as main raw materials, not only has high solid waste utilization rate, simple manufacturing process and low cost, but also the prepared sewage treatment agent has high pollutant removal rate.

The invention relates to a symmetrical inverse Z-type photocatalyst, a preparation method and application thereof. The scheme route adopted is as follows: Synthesize ZnIn by hydrothermal method 2 S 4 and CaIn 2 S 4 , ZnTiO synthesized by sol-gel method 3 and Er 3+ :Y 3 Al 5 o 12 . Through a certain mass ratio, the Er 3+ :Y 3 Al 5 o 12 Add to ZnTiO 3 In the sol, Er is finally prepared 3+ :Y 3 Al 5 o 12 @ZnTiO 3 Complex. Utilizing the characteristic of different isoelectric points of materials, the pH is adjusted to a certain range, and then calcined to prepare ZnIn 2 S 4 / Er 3+ :Y 3 Al 5 o 12 @ZnTiO 3 / CaIn 2 S 4 catalyst of light. Symmetric inverse Z-type photocatalyst ZnIn provided by the invention 2 S 4 / Er 3+ :Y 3 Al 5 o 12 @ZnTiO 3 / CaIn 2 S 4 , can degrade organic pollutants and produce hydrogen at the same time under simulated sunlight irradiation. It regards pollutants as an available energy resource and realizes the dual purposes of environmental governance and clean energy production.

The invention discloses an integrated treatment system for domestic sewage suitable for villages, which includes a feed solid-liquid separation unit, the feed solid-liquid separation unit is provided with a feed port and is used to connect with sewage water inlet pipes; An anaerobic treatment unit is provided at the lower part of one side of the unit, and the water inlet end of the anaerobic treatment unit is connected with the outlet end of the feed solid-liquid separation unit; a vertical underflow artificial wetland and a horizontal Subsurface flow constructed wetland, and the outlet end of the anaerobic treatment unit is connected to the water inlet end of the vertical subsurface flow constructed wetland through a pipeline and a suction device arranged on the pipeline, and the water outlet of the vertical subsurface flow constructed wetland is connected to the horizontal subsurface flow constructed wetland connected to the water inlet. The invention also discloses a domestic sewage treatment method suitable for villages; the invention has the advantage of being able to improve the quality of sewage treatment.