110results about How to "Increase settling velocity" patented technology

The present invention provides porous mineral oxide beads which have large pore volumes and enhanced stability. The beads are based on a tetravalent metal oxide, such as zirconia, titania or hafnia. These highly porous beads are produced from a mixture of tetravalent mineral oxides, mineral pore inducing agents which are oxides or salts of trivalent metals, and optional binders. The porous mineral beads can be filled with a polymer gel and used for adsorption and chromatography applications.

Methods of manufacturing alumina abrasive for use in chemical mechanical polishing are described, wherein the abrasive is in a slurry having gamma alumina formed in a low temperature fuming process, water, an acid sufficient to maintain the pH below about 7, wherein the slurry does not settle appreciably in an 8 to 24 hour period. Advantageously, the alumina is wet-milled without the use of wet-milling salt additives.

A method for removing metal contaminants from acidic mine wastewater using lignin derivatives, such as lignosulfonates and kraft lignin, an alkali coagulant, such as a lime compound, and an alkaline composition for increasing the pH. The lignin derivatives are dispersed in the wastewater and the coagulant is added, increasing the pH to about 4.5-8.5 and causing the formation of a floc. The alkaline composition is then added to bring the pH to about 9 to 10, causing the further formation of a floc. Optionally, air oxidation is carried out, reducing the pH to about 8.1-8.6. Optionally, a ferric or ferrous salt may also be added. The flocs comprise metal-lignin colloids, metal hydroxides and metal salts. The flocs coagulate to form a sludge. Optionally, fly ash or diatomaceous earth may be added to increase the density and stability of the sludge. The sludge that is formed contains the metals and is separated from the treated water by filtration.

The invention discloses a plate-shell type nonsaturated evaporation condensing device comprising an upper housing body, a plate-shell type heat exchanger, and a lower housing body. The upper housing body is connected with the lower housing body by a water pump, and the heat exchange main body is the plate-shell type heat exchanger which is connected with the upper housing body and the lower housing body respectively. The plate-shell type heat exchanger comprises an upper tube plate, a lower tube plate, heat exchange plate bundles, a housing, a baffle, a gas-distributing pipe and a collector tube. The upper tube plate is provided horizontally, the lower tube plate declines in the direction of the flowing hot fluid, the plate type heat exchanger gets through holes in the upper tube plate and the lower tube plate with a in-line modus, and the baffle is disposed among the heat exchange plate bundles. The inventive device is provided with a large effective heat transfer area, even aqueous film allocation, rapid settling velocity, quick transfer of nonsaturated evaporation heat and moisture, anabatic liquid membrane fluctuation, enhanced turbulent flow, an attenuated liquid membrane laminar sublayer, decreased heat resistance, a small condensing resisting force and a remarkable condensing effect. Deposit and erosion are reduced, a mall floor space is provided, and the inventive device is suitable for condensing and cooling field.

The invention provides a comprehensive recovery process of intense-weathering poor vanadium titano-magnetite. The comprehensive recovery process of the intense-weathering poor vanadium titano-magnetite comprises the steps of prescreening, crushing, dry separation, primary grinding, primary magnetic separation, secondary grinding, secondary magnetic separation, strong magnetic separation, floating separation and syrup mixing, and titanium floating separation. The process of titanium floating separation comprises the steps of rough separation, scavenging for two times, and fine separation for four times. According to the comprehensive recovery process of the intense-weathering poor vanadium titano-magnetite, the problems that a throwing tail is high in grade and recovery rate of titanium concentrate is low when an existing process and an existing device are used for processing the intense-weathering poor vanadium titano-magnetite are solved. The index of finished products based on the comprehensive recovery process is that the grade of iron ore concentrate is 64% and yield of the iron ore concentrate is 37%, the grade of the titanium concentrate is 42% and the yield of the titanium concentrate is 41%, and the grade of fine-grain gangue iron is lower than 7% and the grade of titanium is lower than 1%.

The invention relates to a factorized totally-closed circulating aquaculture system of sea cucumbers, belonging to the technical field of aquaculture. The factorized totally-closed circulating aquaculture system comprises a special culture pond and a water treatment system; the special culture pond is a circular bead pond of which the bottom is shaped as a pan bottom, a water outlet is formed in the lowest position of the center of the special culture pond, and three to five circles of porous bottom flushing pipes are horizontally paved at the bottom of the pond; the water treatment system comprises a slow flow settling pond, a pump pond, a water lifting pump, a protein foam separator, a first-stage pollution cut biopurification pond, a second-stage degassing biopurification pond, a steam water convection oxygenation pond and a pipeline type ultraviolet sterilizer. The culture system suitable for factorized totally-closed circulating aquaculture is designed according to the biological characteristics of sea cucumbers and an aquaculture water circulation utilization technology; the daily supplement of new water is less than 5 percent during culture by using the system disclosed by the invention. Compared with a traditional water change or running water culture method, the system disclosed by the invention has the advantages that the water saving amount reaches over 95 percent; more importantly, the temperature control energy consumption in the culture process is greatly reduced and the energy is saved by over 70 percent.

The invention provides an in-situ treatment system of black and odorous water and a method of using the system to treat black and odorous water. The in-situ treatment system of black and odorous watercomprises a pretreatment zone, an in-situ treatment zone and a separation zone; a certain section of a river channel is modified, more deflections are added to water flows, the water has longer stayin a unit zone, and the land around is scarcely used; in-situ restoration is mainly dependent on a biological method assisted by physicochemical methods, and the quality of the black and odorous wateris finally improved. In the method, the in-situ restoration of the black and odorous water is confined in a smaller area so that the concentration of microbes in the water of this area is increased,reflow can be achieved, contaminants in the water gain full time to degrade, treatment cost is lowered, and treatment is fast, efficient and free of secondary contamination.

The invention discloses an electrothermal copper-smelting slag depleted furnace, which comprises a furnace body, supports, an oxygen lance and electrodes; the furnace body comprises a furnace shell defining a furnace chamber and a refractory material layer arranged on the inner wall of the furnace shell, the furnace body is provided with a feed inlet for feeding copper-smelting slag and vulcanizing agent into the furnace chamber, a siphon inlet for discharging copper matte, a waste slag-discharging outlet, electrode plugholes, a smoke outlet and an oxygen lance plughole, wherein the oxygen lance plughole is formed at the bottom of the furnace shell; the furnace body is supported by the supports; the oxygen lance is plugged into the oxygen lance plughole; and the electrodes are plugged into the furnace body via the electrode plugholes. When the electrothermal copper-smelting slag depleted furnace is used for bottom-blowing electrothermal copper-smelting slag depletion, the copper content in waste slag can be reduced, and electricity consumption can be decreased.

The invention discloses a catalyzing and cracking slurry oil settling agent. The catalyzing and cracking slurry oil settling agent is prepared from raw materials including, by weight, 10.0-12.0% of polyoxyethylene and allyl polyethylene oxide block polymers, 7.0-8.0% of PPG (poly propylene glycol) 8000, 5.0-7.0% of dimethyl diallyl ammonium chloride homopolymers, 4.0-6.0% of polyoxyethylene sorbitan laurate and the balance of aromatic hydrocarbon oil. The invention further discloses preparation method and application of the catalyzing and cracking slurry oil settling agent. Attraction between the catalyzing and cracking slurry oil and solid catalyst powder can be lowered by the aid of the formulated settling agent, settling velocity and remove rate of the catalyst powder are increased, ash content is effectively reduced, and quality is further guaranteed for the catalyzing and cracking slurry oil settling agent.

There is disclosed a device for purifying oily wastewater, including a vertical tank of an atmospheric pressure, inside which a central coagulation reaction tube, a reverse cone-shaped cyclone flocculation stage, a suspended sludge filtering zone and a purified water commutation stage of inclined plates are included from bottom to top sequentially, oily wastewater is sequentially subjected to a coagulation reaction, suspended sludge filtering and a purified water commutation process and then discharged, a sludge collecting groove collects and guides the suspended sludge to a sludge concentrating zone for further sedimentation and concentration processes and then discharges it to external to the tank, in this way, the purification reaction, flocculation and fine filtration of wastewater and the sludge concentration process are integrated within the same wastewater purifying device. Thus, the device is equivalent to the existing wastewater pretreatment system plus a fine filtration system.

The invention relates to a cold rolling oil composition and use thereof, which is mainly used for solving the problems of heavy oil mist in a workshop after rolling as well as poor surface cleanness and poor annealing cleanness after rolling in the prior art. The cold rolling oil composition comprises the following components in parts by weight: a) 1-20 parts of aromatic acid diester, b) 1-25 parts of fatty acid monoester, c) 0.01-5 parts of a fog resistant agent and d) 50-97.99 parts of base oil; and the structural formula of the aromatic acid diester is shown in the specification, wherein R1 and R2 are chosen from alkyl groups with 3-8 carbon atoms. By means of the technical scheme, the problems are better solved; and the cold rolling oil composition can be applied to industrial production of stainless steel thin plates with 2B and BA high-precision grades.

The invention discloses a method and device for treating hardly-degraded industrial wastewater of a powdered activated carbon magnetic-coagulation settling pond. The method comprises the following steps: adding powdered activated carbon into wastewater after biochemical treatment of the wastewater, and performing cyclic adsorption treatment by a reverse-flow system; sequentially adding coagulant, magnetic powder and a flocculating agent into the wastewater, and performing flocculation treatment; performing mud-water separation on the wastewater to obtain supernate and sludge; and retrieving magnetic powder in the sludge, and discharging the sludge. According to the method for treating hardly-degraded industrial wastewater of the powdered activated carbon magnetic-coagulation settling pond, the powdered activated carbon is cyclically contacted with water for several times to achieve the effect of saturation adsorption, so that the wastewater treatment cost is reduced, and the wastewater treatment effect is improved.

The invention discloses a loading flocculation pretreatment method of antibiotic fermentation wastewater and is suitable for processing mixed wastewater discharged during each antibiotic fermentation technological section. By the adoption of the loading flocculation technology, flocculation pretreatment is carried out on mixed wastewater of a crystallization solution, waste mother liquor, dona tub washing wastewater and washing wastewater for a fermentation cylinder during the antibiotic production process. A flocculating agent contains polyaluminum chloride and polyacrylamide; and the addition sequence of the flocculating agent is to add polyaluminum chloride at first and then add polyacrylamide. A loading agent contains one or two mixtures selected from active carbon, fly ash, activatedsludge and settling sludge. By the adoption of the method provided by the invention, the flocculation treatment can be effectively carried out on high-density organic wastewater generated during the antibiotic fermentation production. The method provided by the invention is simple, requires low cost and has a stable effect. By the adoption of the method, the treated wastewater can reach the requirement of subsequent biochemical treatment.

A new adsorbent of a porous mineral oxide material with apatite crystals, preferably hydroxyapatite crystals, in the pores of the mineral oxide material is disclosed. The adsorbent is useful for protein and nucleic acid separations

The invention discloses a compound enzymatic clarifying agent for the sugar industry and a preparation method and application for the compound enzymatic clarifying agent. The compound enzymatic clarifying agent comprises, by weight, from 35% to 60% of alpha-glucanase, from 20% to 30% of pectinase, from 10% to 35% of amylases, from 5% to 10% of cellulase and from 0% to 15% of water. The preparation method includes proportionally mixing the alpha-glucanase, the pectinase, the amylases and the cellulase which are raw materials to obtain a mixture; and filtering the mixture via a fine filter membrane to obtain the compound enzymatic clarifying agent. The compound enzymatic clarifying agent is added during a working section for extracting juice from sugar crops, the feeding quantity of compound enzymatic clarifying agents added into 1kg of the sugar juice ranges from 10mg to 30mg, the sugar juice clarifying efficiency can be effectively improved, the viscosity of sugar liquor is reduced, the filtering speed and the settling speed are increased, the quality of sugar products is improved, the sugar yield is increased, an original sugar production process is unchanged, and operation is simple and feasible.

The application provides a mineral processing tailing wastewater treatment method. The mineral processing tailing wastewater treatment method comprises the following steps: A), mixing the mineral processing tailing wastewater and a destabilizing agent to obtain destabilized wastewater; B), mixing the destabilized wastewater and a first coagulant and sedimenting to obtain tailing wastewater supernatant and flocs; and C), mixing the tailing wastewater supernatant and a second coagulant and sedimenting to obtain purified water. During the treatment of mineral processing tailing wastewater, the wastewater is firstly destabilized so that suspended solids in the tailing wastewater is free from the steady state and then the destabilized tailing wastewater is further purified by virtue of a two-stage coagulating sedimentation method in a connected-in-series manner so as to accelerate the formation and sedimentation of coarse particle polymers, the contents of the suspended solids and heavy metal ions in the wastewater are decreased in a short time and the environmentally acceptable discharge of the wastewater is achieved.

The invention relates to a feeding system for a thickener. The feeding system comprises a feeding pipe, a flow stabilizing cylinder, a flocculant pipe, a distributing ring and a scraper, wherein the flow stabilizing cylinder comprises a main material cylinder, a deflector, a grading blade and a diluting pipe; an outlet of the feeding pipe is communicated with an inlet of the main material cylinder, the deflector is arranged on the inner side of the main material cylinder, the grading blade is arranged on the inner side of the deflector, the diluting pipe is communicated with the main material cylinder in the tangent direction of the main material cylinder, the flocculant pipe is arranged above the deflector and is communicated with the deflector through a flocculant hopper, the distributing ring is arranged below the main material cylinder, and the scraper is arranged above the distributing ring. Through the feeding system for the thickener, the sedimentation efficiency of the thickener can be effectively increased, the sedimentation speed is increased, and the processing quantity of unit area of a thickening pool is increased.

The invention discloses an electrothermal copper-smelting slag depleted furnace body. The furnace body comprises a furnace shell defining a furnace chamber and a refractory material layer arranged on the inner wall of the furnace shell. The furnace body is characterized in that: the furnace body is provided with a feed inlet for feeding copper-smelting slag and vulcanizing agent into the furnace chamber, a siphon inlet for discharging copper matte, a waste slag-discharging outlet, electrode plugholes, a smoke outlet and an oxygen lance plughole, wherein the oxygen lance plughole is formed at the bottom of the furnace shell. When the electrothermal copper-smelting slag depleted furnace body is used for bottom-blowing electrothermal copper-smelting slag depletion, the copper content in waste slag can be reduced, and electricity consumption can be decreased.

The invention discloses a coal tar full-fraction fluidized bed-fixed bed combined treatment process. The combined treatment process comprises the following steps: feeding a full-fraction coal tar rawmaterial and an auxiliary agent into a pretreatment tank for mixing; carrying out liquid-solid separation after mixing treatment; a liquid-phase material obtained after separation enters a fluidized bed hydrogenation reaction unit for a hydrogenation reaction; feeding the obtained reaction outflow into a separation tank to be subjected to gas-liquid separation, thus forming a gas-phase material and a liquid-phase material after separation, and then separating the liquid-phase material into a first liquid-phase material and a second liquid-phase material, returning the first liquid-phase material to the pretreatment tank; feeding the second liquid-phase material to a fixed bed hydrogenation reaction unit for hydrogenation reaction; and fractionating the reaction outflow to prepare naphtha,diesel oil and hydrogenated tail oil. The process provided by the invention can realize efficient utilization and long-period operation of coal tar resources.

The invention discloses a garbage collecting device for a cleaning vehicle. The garbage collecting device comprises a suction nozzle (1), a garbage collecting cabin (3) and a fan, wherein the garbage collecting cabin (3) is communicated with the suction nozzle (1) through a suction pipe (31); the garbage collecting cabin (3) is partitioned into a first section (33) for installing the suction pipe (31) and a second section (34) provided with an air outlet (32); and air current entering from the suction pipe (31) spirally rises from the side wall of the second section (34) to the air outlet (32) after passing through the first section (33). The invention further discloses a cleaning vehicle provided with the garbage collecting device for the cleaning vehicle. Air current rises spirally in the garbage collecting cabin, so that garbage particles and dust in the air current can be separated rapidly from the air current and be precipitated under the action of centrifugal force, and the garbage settling speed and dust particle capturing capacity can be increased.

The invention discloses a method for coagulation-ion exchange-coagulation circulating reflux treatment of secondary effluent and belongs to the technical field of water treatment. By virtue of the coagulation-ion exchange-coagulation treatment process, the water quality of the effluent can be effectively improved, the floc particle size and the sedimentation speed in a coagulation unit are increased, and the using amount of a coagulant is reduced; the service life of resin can be prolonged. The process is stable in operation, and by adopting the process, the fluctuations in the water quality can be effectively dealt, the amount of treatment water is increased, and the operation cost is reduced.

The invention relates to an electromagnetic coagulation treatment method, and belongs to the field of coagulation treatment of water. According to the invention, a prepared coagulant solution is magnetized through an electromagnetic device and then added to a mixing reaction tank to be coagulated. The coagulant solution prepared at a certain concentration is magnetized by the electromagnetic device through a chemical dosing device and then added to mixing equipment to be mixed, and then a flocculation reaction, sedimentation and subsequent treatment are conducted on the coagulant solution. Under the circumstance that other conditions are the same, when being compared with the coagulation effect of an un-magnetized coagulant solution, the coagulation effect of the magnetized coagulant solution is that the best chemical dosing quantity can be reduced by 25 percent to 35 percent, the sludge moisture content is reduced by 3 percent to 5 percent, the sludge volume can be reduced by 15 percent to 40 percent; and meanwhile, the flocculating constituent forming speed is increased, the sludge sedimentation speed is increased, the flocculation time and the sedimentation time are shortened, the chemical dosing quantity and the sludge volume are greatly reduced, and subsequent sludge transportation and treatment costs are greatly reduced.