60results about How to "Increase density difference" patented technology

The invention relates to a method for producing high-arene environment-friendly rubber oil. The method comprises the steps of taking heavy-solvent extract oil of a lubricating-oil solvent-refining device as raw material, adding an auxiliary agent to the raw material and then refining solvent, wherein the heavy-solvent extract oil has the flash point higher than 200 DEG C, the kinematic viscosity greater than 15.0 mm<2>/s at 100 DEG C and the CA value greater than 35.0 percent; the auxiliary agent is single-hydrocarbon or light-hydrocarbon oil with low density, low viscosity and boiling point between 80 and 300 DEG C; the solvent is N-methyl pyrrolidone, phenol or furfural; a refining tower has the temperature between 50 and 100 DEG C on the top and has the temperature between 30 and 100 DEG C on the bottom; and the mass ratio of the raw material to the auxiliary agent to the solvent is 1.0:0.1-0.5:2.0-5.0. Refined oil is high in arene content; the CA value of the refined oil is above 19.0 percent; the arene content of the refined oil is greater than 50.0 percent; the PCA content of the refined oil determined by an IP346 method is less than 3.0 percent; the benzopyrene of the refined oil is less than 1 PPM; and the total content of eight specific polyaromatic hydrocarbon is less than 10 PPM.

The invention discloses a moulding method of a variable-density broadband wave-transparent quartz composite ceramic antenna housing body. The method comprises the following steps: according to dimension and quality request of the housing body, integrally weaving an outer material and an inner material to obtain an inner and outer housing body fabric; putting the housing body fabric in water to be cooked and soaking in acid liquor; then, putting the housing body fabric in an utensil filled with a silica sol for dipping and compounding; and finally machining a housing body blank to a required dimension to obtain the antenna housing body. According to the moulding method disclosed by the invention, the outer layer of the housing body fabric is woven by quartz fiber yarns, so that the volume percentage of the quartz fiber yarns is 40-45% while the inner layer of the housing body fabric is woven by hollow quartz fiber yarns, so that the volume percentage of the hollow quartz fiber yarns is 25-30%, therefore, the fiber volume percentages of the inner and outer layers of the housing body fabric are different. Meanwhile, the inner and outer layers are integrally attached and woven, the layering problem is avoided, and the housing body has relatively good structural strength is powerfully guaranteed as a result of relatively good strength of a reinforcement.

The invention provides a gas-liquid-solid three-phase fluidized bed sorting machine and a sorting method thereof. The sorting machine comprises a sorting barrel, a center feeding barrel, a conical distribution plate, a fine coal overflow collecting tank, a bubble generator, a fluid distribution master and branch pipe, a buffering and discharging fluid distribution plate, a bed online densimeter, a programmable density controller, an underflow discharging automatic control actuator and an underflow discharging valve. The sorting method includes the steps that water flow passes through the bubble generator and the fluid distribution master and branch pipe and enters the sorting barrel and a uniform and stable ascending gas-liquid two-phase fluid is formed in the sorting barrel under the action of the buffering and discharging fluid distribution plate, and materials entering the sorting barrel are separated according to differences of density and surface properties, so that sorting precision of the materials according to density differences is improved, and the loss that low-density rough particles enter underflow and the defect that high-density fine silt pollutes fine coal are effectively avoided. The gas-liquid-solid three-phase fluidized bed sorting machine is simple in structure and method, low in sorting lower limit, wide in processing particle range, high in sorting precision, high in reliability and wide in applicability.

An imaging lens assembly includes six lens elements which are, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The second lens element has positive refractive power. The third lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The fifth lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The image-side surface of the fifth lens element has at least one inflection point.

The present invention discloses a floatation cyclone couping separation method of oil-containing sewage, and is characterized by that because of the special stirring function of the vortex pump, the vortex pump suck oil-containing sewage while sucking air, and the sewage and air are stirred and mixed, the pressure is increased to the greater than or equal to 0.20 MPa, then pumped into the oil-removing cyclone with special structure. Because pressure is suddenly reduced, lots of microfine air bublbes are quickly released out, and the air bubbles and microsmall oil drops can be automatically adhered together under the action of interfacial tension in the cyclone centrifugal force field, because the density of oil drop and air bubble adhered body is greatly less than that of oil phase, so that the small oil drops can be separated out by adopting floatation cyclone combined equipment, and its cleaning rate can be up to above 99%.

The invention relates to a single-photon laser height measurement data denoising method and device based on density statistics. The method comprises the following steps: 1) obtaining single-photon laser altimetry data; 2) performing data preprocessing; 3) carrying out photon density calculation by using an ellipse search area whose direction and size change adaptively with the gradient; and 4) adaptively calculating segmented threshold separation signal photons and noise photons by adopting an OTSU method, and removing discrete noise points by adopting a K nearest neighbor distance. Compared with the prior art, the method is not influenced by non-uniform background noise photons, and is high in adaptability, the direction of the search ellipse can be changed adaptively along with the slope, the size can be changed, signal photons and noise photons of each segment are separated by using the segmentation threshold, and a small number of discrete noise points left after rough denoising are further removed; and the method is complete in signal extraction, high in denoising precision and high in efficiency.

A method for separating carbon nanotubes comprises: providing a mixture of carbon nanotubes; introducing an organic molecule having an end group capable of being chelated by a metal ion to the mixture of carbon nanotubes to covalently bond the organic molecule to at least one of the mixture of carbon nanotubes; and introducing a metal salt to the mixture of carbon nanotubes to chelate the end group of the organic molecule with the metal ion of the metal salt; and centrifuging the mixture of carbon nanotubes to cause the separation of the carbon nanotubes based on a density differential of the carbon nanotubes.

The invention relates to a magnesium alloy refining agent and a preparation method for the magnesium alloy refining agent. The compositions and content of the magnesium alloy refining agent are that: 25 to 35 weight percent of potassium chloride, 5 to 10 weight percent of calcium fluoride, 5 to 9 weight percent of barium chloride, 1 to 10 weight percent of manganese chloride, 0.2 to 0.7 weight percent of titanium sponge and 0.1 to 1.0 weight percent of boron oxide, and the residual is magnesium chloride. By adoption of the magnesium alloy refining agent of the invention, iron content in alloys can be obviously reduced. In the embodiment, wrought magnesium alloys AZ31D are prepared; analytically, contents of main metallic impurities are that: iron: less than or equal to 0.002 percent; copper: less than or equal to 0.001 s; nickel: less than or equal to 0.001 percent.

The present invention discloses a papermaking method using diaper absorbent core layer fibers. The diaper absorbent core layers are pulverized and dissolved in water; an inorganic aluminum salt is added and stirred fully, and then defibering is carried out to obtain a fiber slurry; and then the fiber slurry is subjected to papermaking. According to the papermaking method using diaper absorbent core layer fibers, first the added inorganic aluminum salt destructs interfacial double electrical layers of a superabsorbent hydrogel material to increase the density difference between an inner phase and an outer phase and to promote precipitation of the inner phase; at the same time, the polarity difference between the inner and outer phases is increase, so that outer phase namely an oil phase has decreased solubility in water, and goal of removing SAP is ultimately achieved; the diaper absorbent core layer fibers after SAP removal are reused for papermaking, so as to achieve the effective recovery of diaper absorbent core layers, substantially save resource, energy conservation and transport, reduce emission and improve the social and economic benefits, and make great contribution to the pulping and papermaking industry.

A process for separating sodium bicarbonate brine from crude tall oil or for separating sulfate brine from soap oil, such as in a recovery process in a pulp mill. A water solution having an increased density is added during the neutralization of crude tall oil soap with carbon dioxide or acidulation of soap oil with sulfuric acid.

The present invention discloses a method for reusing leftover bits and pieces of diaper. The water-absorbing resin in the leftover bits and pieces of diaper is removed by using inorganic aluminum, and then the leftover bits and pieces of diaper are treated for papermaking. The method for reusing leftover bits and pieces of diaper uses inorganic aluminum salt to damage the interface double electric layer of the superabsorbent hydrogel material, improve the density difference of the two phases inside and outside, promote precipitation of the internal phase; and the increase of the polar phase difference of the internal and external phases decreases the solubility of the external phase (the oil phase) in water, so as to ultimately achieve the goal of removing SAP. The present invention achieves effective recovery of leftover bits and pieces of diapers, saves a substantial amount of resource, energy, transportation and emissions, improves the social and economic benefits, and makes great contribution to the pulping and papermaking industry.

A photographing optical lens system includes six lens elements. The six lens elements are, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The second lens element has negative refractive power. The third lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The fifth lens element has an image-side surface being concave in a paraxial region thereof. The sixth lens element has positive refractive power.

The invention relates to a solvent system in a working liquid for hydrogen peroxide production with an anthraquinone method, wherein the solvent system comprises, by volume, 65-80% of heavy aromatic hydrocarbon, 5-15% of trioctyl phosphate, 5-15% of 2-methylcyclohexyl acetate, and 5-15% of 2-phenylethanol. According to the present invention, with the application of the solvent system to prepare the working liquid, the good hydrogen efficiency can be provided during the hydrogen peroxide production process with the anthraquinone method; and the density difference between the working liquid and the water is high, and the surface tension of the working liquid is high, such that extraction and other subsequent operations are easily performed.

The invention discloses a grease waste liquid treatment device. The treatment device comprises a treatment box body, an aeration system, a rotating shaft system and a central rotating shaft driving system, an inner cavity of the treatment box body is divided into an oil-water separation cavity and a multi-stage waste liquid treatment cavity, and the treatment device can be used for carrying out aerobic treatment, anaerobic treatment or anaerobic and aerobic composite treatment on oil-removed waste liquid after oil-water separation according to requirements. The internal structure of the treatment device is reasonably improved; the oil-water separation effect of the grease waste liquid is enhanced based on the gravity-air floatation principle; meanwhile, a biological treatment function is integrated; aerobic treatment, anaerobic treatment or anaerobic and aerobic composite treatment of the deoiling waste liquid obtained after oil-water separation can be respectively realized as required; resource utilization and environmental protection of the grease waste liquid are facilitated, the purposes of simplifying equipment and reducing treatment cost are achieved while high efficiency isachieved, and the method is particularly suitable for common families, catering merchants of various scales, central kitchens and other scenes.

The invention discloses an oil dirt processing device for domestic wastewater. The oil dirt processing device comprises a processing box, wherein a water inlet area, a coalescence area and a separation box are sequentially arranged in the processing box; a partition is arranged between the water inlet area and the coalescence area; a water running opening is formed below the partition; a water inlet I is formed above the water inlet area; a horizontal round shaft is arranged in the water inlet area and the coalescence area and penetrates the partition; stirring blades are arranged on the side surface of the round shaft; the water inlet I is aligned to the stirring blades; a groove in the vertical direction is formed in the middle above the separation box; a water inlet II is formed in the left side of the groove; a heating tube is arranged below the water inlet II; a water outlet is formed in the right side of the groove; an oil suction bag is arranged at the water outlet; and a fiber-ball filter is arranged in the oil suction bag. The oil dirt processing device is reasonable in structure, convenient to use, small in land occupation, low in cost, easy in oil-water separation and strong in oil dirt processing capability.

The invention discloses a multistage self circulation anaerobic digestion reactor. A first-stage three-phase separator and a second-stage three-phase separator of the reactor are fixedly arranged in atank body; both of the first-stage three-phase separator and the second-stage three-phase separator are in conical shapes with the big diameter ends at the lower side and the small diameter ends at the upper side; the second-stage three-phase separator is positioned above the first-stage three-phase separator; a primary reaction region is formed under the first-stage three-phase separator; a space from a position under the primary reaction region to the tank bottom is a water distribution mixing region; a secondary reaction region is formed between the first-stage three-phase separator and the second-stage three-phase separator; a space between the second-stage three-phase separator and the top of the tank body is a precipitation water outlet region. The external power assists multistagecirculation; marsh gas jet flow is used to enter each stage of reaction regions; the mass transfer and flow speed controllability is high; the gas liquid density difference in the reaction region is reinforced; the circulation, mixing and stirring functions of the system are fast enhanced; the sediment deposition is prevented; the multistage self circulation anaerobic digestion reactor is suitablefor the anaerobic fermentation of high-solid-content sewage; the treatment effect and efficiency of water quality with poor biodegradability and high concentration can be improved.