31results about How to "Improve the efficiency of flocculation and sedimentation" patented technology

The present invention provides a method for preparing high-effective algae flocculant from non-toxic, easy-to-bio-degrade, cheap, natural macromolecular polymer modified clay. Said modification can obviously raise flocculation algae-removing capability of different clay, the algae-removing rate of various clays can be 20-95% Said high-effective algae flocculant can be used for controlling and treating large area red tide, fresh water algal bloom, and also can be used for removing harmful algae in river and drinking water plant.

The invention discloses a small-sized rapid-precipitation environment-friendly sewage treatment device, which comprises a sedimentation tank, a driving motor and a filter tank; A brush plate; a drive shaft is provided under the filter plate, and spiral blades in opposite directions are provided on the left and right sides of the drive shaft. The present invention is equipped with reverse spiral blades and trapezoidal material guide plates to horizontally stir and mix the sewage and flocculants, so that the flocculants can be rapidly diffused and mixed, improving the efficiency of flocculation and sedimentation, and at the same time reducing the impact on the settled sludge. Stir to improve the efficiency of sedimentation; the present invention is provided with a reciprocating brush to avoid clogging of the filter holes and ensure normal filtering; the present invention is provided with a filter plate, a sandstone packing plate and an activated carbon packing plate that are easy to disassemble, and has better Excellent purification effect, easy to disassemble and clean.

The invention relates to mobile skid-mounted equipment for efficient water treatment. The mobile skid-mounted equipment for efficient water treatment can operate continuously or intermittently and is characterized by comprising three independent skid-mounted parts, namely, a pre-treatment flocculent precipitation system, a biological treatment system and a deep membrane treatment system, and the integrated mobile skid-mounted treatment equipment is communicated with a sewage tank through a conveying water pump; in terms of flocculent precipitation, a specific agent is adopted, and suspended matter as well as poisonous and harmful heavy metal and the like can be removed through accurate flocculation, stirring and precipitation; the biological treatment system comprises an aerobic tank, an MBR (membrane biological reactor) tank and the like; the deep treatment device can remove high salt and other ions through filtration of reverse osmosis membranes. The equipment has the benefits as follows: discharged water meets the national discharge or reuse standard after collected waste water in oil and gas fields is treated through the integrated skid-mounted equipment for water treatment. The equipment has the advantages of advanced technique, stable performance, good treatment effect, little investment, simplicity in operation, convenience in management, use and maintenance and the like and is a whole set of mobile treatment device specially designed according to water quality characteristics of the waste water in the oil and gas fields.

The invention relates to a multi-effect water treatment agent, a preparation method thereof and a water treatment method. The multi-effect water treatment agent is prepared from acrylamide oligomer grafting graphene oxide, polyacrylamide, polysilicate aluminum ferrite, poly(diallyl dimethyl ammonium chloride) and sodium bicarbonate, wherein the acrylamide oligomer grafting graphene oxide is prepared by two steps of graphene oxide carboxylation and grafting reaction. The multiple-effect water treatment agent can adapt to multiple complex water qualities, and particularly can effectively remove benzene compounds and heavy metal ions. The water treatment method comprises stages of mixing, preliminary flocculation, secondary flocculation and filtering; the efficient utilization of the water treatment agent is realized by using a lower water backflow step, and the production cost is lowered.

The invention discloses a method for concentrating high-concentration brine. The brine is treated in a circulating efficient sedimentation zone, a circulating ultra-filtration zone, a nano-filtration zone and a high-salt reverse osmosis zone; the method is suitable for treating thick brine of which the salt content is 1-5%; to-be-treated water enters the circulating efficient sedimentation zone firstly and is stirred uniformly by a stirrer in the circulating efficient sedimentation zone, and temporarily hard ions are removed by adding lime, wherein the lime adding quantity is determined according to the temporarily hard level of the to-be-treated inlet water; then the water enters the circulating ultra-filtration zone, water is produced by membrane hole filtration during circulating ultra-filtration, and suspended solid granules are reserved in backflow liquid; a double-circulation operating manner is adopted in the nano-filtration zone, and a part of concentrated water flows back to the circulating efficient sedimentation zone and is further settled; and the other part of concentrated water flows back to the nano-filtration zone as inlet water, and the water produced in the nano-filtration zone enters the high-salt reverse osmosis zone and is concentrated by a reverse osmosis membrane and further desalted by high-salt reverse osmosis.

The present invention discloses method of dewatering concentrated bauxite, and features that during filtering and dewatering concentrated bauxite pulp, compound containing Ca2+ ion is added as the filter aid, with the filter aid adding amount being 0.5-5 wt% of solid concentrated bauxite. The method is simple and practical, and has high concentrated bauxite dewatering efficiency, concentrated bauxite filtering capacity 30-50 % raised, and no influence on the subsequent Bayer process production.

The invention relates to a purification method of muddy water, in particular to a flocculating agent for rapidly purifying muddy water, and a rapid purification method of the muddy water, mainly aiming at solving the technical problems that in the prior art, the purification method of the muddy water is high in cost and low in efficiency; the muddy water, which very easily causes environmental pollution, is discharged into construction sites, municipal rainwater pipelines positioned beside the construction sites or sewer pipelines, so that the rainwater pipelines or rivers where the muddy water is discharged can be blocked. The purification method comprises the steps of separating large particles of suspended matters in muddy raw water by using a grate, and adding right amount of the prepared flocculating agent into the muddy raw water, wherein the flocculating agent is prepared by fully stirring and mixing divalent ionic type salt solid and anionic macromolecule organic solid powder, the divalent ionic type salt solid is a mixture of calcium salts and iron salts, and the adding amount of the flocculating agent is 1/1000-1/100 of the dry base amount of mud; fully stirring and mixing; then, enabling the obtained mixture to enter a sedimentation tank for carrying out precipitation, directly discharging precipitated supernatant, dewatering the precipitated mud and then transporting the mud to the outside.

The invention relates to a water treatment agent for quick flocculating, and a preparation method and a water treatment method thereof. Firstly, the invention provides the water treatment agent for quick flocculating, which comprises an acrylamide oligomer/ graphene oxide/ ferroferric oxide compound, polyacrylamide, polysilicate aluminum ferrite, poly dimethyl diallyl ammonium chloride and sodium bicarbonate, wherein acrylamide oligomer grafted with graphene oxide is prepared by the following three steps of carboxylation of the graphene oxide, the preparation of carboxylic ferroferric oxide and composite reaction; the water treatment agent can realize quick flocculating assisted by a magnetic field, and adapts to various complex water qualities. Secondly, the invention provides the water treatment method, which comprises the following steps of mixing, preliminarily flocculating, secondarily flocculating and filtering; an underlying water refluxing step is adopted to realize the efficient utilization of the water treatment agent, so that the production cost is reduced.

The invention relates to the technical field of wastewater treatment, and discloses a chemical wastewater treatment tank which comprises a treatment tank body, a stirring frame is rotatably mounted on the inner wall of the treatment tank body, a transmission cavity is formed in the stirring frame, a transmission assembly is mounted in the transmission cavity, and an aeration assembly is fixedly mounted on the lower surface of the stirring frame. When a transmission shaft rotates, the transmission shaft drives a second straight gear to rotate, so that the second straight gear drives a first straight gear to rotate through a chain, a hollow shaft is driven to rotate, a spiral blade rotates under the action of the hollow shaft, and upward thrust is formed in sewage through rotation of the spiral blade such that particulate matters or floccules in sewage near the transmission shaft move upwards, the probability that the floccules and other matters block the aeration head in the hollow shaft is effectively reduced, and meanwhile, the spiral blades rotate to form rotary fluctuation in the sewage, so that the fusion of a flocculating agent and the particulate matters in the sewage is accelerated.

The invention discloses a multilayer heavy metal filter device which comprises a primary filter grid net, a secondary filter grid net, an inorganic polymer filter board located between the primary filter grid net and the secondary filter grid net, and a polymeric flocculation micro-pore plate located at the lower end of the inorganic polymer filter board, wherein the primary filter grid net is connected with the secondary filter grid net through a thread groove; and the polymeric flocculation micro-pore plate is located between the inorganic polymer filter board and the secondary filter grid net. The multilayer heavy metal filter device is good in filter effect and high in heavy metal retention rate, the flocculation efficiency is improved, and meanwhile, the flocculation effect is ensured.

The invention provides a down-flow type fluidized bed flocculating settling device. The down-flow type fluidized bed flocculating settling device comprises a flocculating unit, a settling tank and anoverflow water collecting tank, wherein the flocculating unit is arranged at the center of the settling tank; the top part of the settling tank is externally connected with the overflow water collecting tank; the flocculating unit comprises a water distribution funnel, a water distribution grid and a down-flow type fluidized flocculating reaction bed which are sequentially arranged in series fromtop to bottom; the water flow in the down-flow type fluidized flocculating reaction bed flows from top to bottom; the particles of which the densities are different and are lower than the density of water are mixed and arranged in the bed layer. The down-flow type fluidized bed flocculating settling device has the advantages that in the flocculating settling process, the eddy required by the flocculating can be provided by the mixed and arranged low-density particles, the water flow speed gradient can be adjusted, and the floccule can quickly grow; because the settling directions of the waterflow and the particles are uniform, the easiness in mixing return of the floccule particles is avoided, the shearing and crushing of the fluid on the floccule can be effectively reduced, the flocculecan timely settle after penetrating through the bed layer, and the settling efficiency is improved.