753 results about "Density difference" patented technology

A three-dimensional laminated mold is formed by ejecting a mold material into a groove formed in a support. The support is formed from a support material ejected from an inkjet head. The support material has a ratio of density difference of equal to or less than 13.5%. The ratio of density difference is calculated from an equation:

ratio of density difference=((D1-D2)/D1)×100

wherein D1 indicates the density of the support material at 20° C., and D2 indicates the density of the support material at a temperature at which a viscosity of the support material measured using a rotational viscometer falls within the range of 10±1 mPa·s.

The present invention relates to a seat or chair cooling apparatus. In an embodiment the seat cooling apparatus cools the back of a user without the need of forced air. The seat cooling apparatus includes an array of conduits held in place by a set of supports to form a heat exchanger. Heat from the contact surfaces is removed by free convection, an upward air movement due to density difference. When the seat cooling apparatus is in the preferred substantially vertical arrangement, the warm air exiting the conduits is replaced by cooler air entering the conduits. A seat securing attachment secures the heat exchanger components to a seat. The seat cooling apparatus shapes into the back of the user to provide comfort that is effective in cooling. The seat cooling apparatus can be light weight, portable, and occupies little space, can be quickly installed and removed, easily cleaned and is very low cost to manufacture. In another embodiment, the seat cooling apparatus is easily connected to a forced air cooling source to increase the cooling rate if desired by the user.

The invention relates to a method for recycling metal and combustibles from domestic waste incineration slag, and belongs to the field of the solid waste harmless and recycling technology. By means of multi-stage gradient magnetic separation, separation of magnetic metal in the slag is achieved. By means of two-stage eddy current, nonferrous metal in the slag is separated and recycled. According to the grain size distribution and chemical morphological characteristics of the metal in the slag, the metal is crushed and screened in multiple steps so that separated slag particles can be uniform, the recycling rate of magnetic separation and eddy current separation is effectively increased, and finally, according to the density difference of materials, air separation is used for recycling the combustibles in the slag. Finally, the magnetic separation recycling rate of iron in the technological process is 60-80%, the recycling rate of the nonferrous metal aluminum is 60-70%, the recycling rate of the nonferrous metal copper is 40-50%, and separation of the metal in the slag and slag particles can be effectively achieved. The separated metal products can be directly sold or sold after refining, the combustibles can serve as waste incinerator fuel, and the remaining slag can be used as building materials.

A variety of hollow structures with unique morphologies were manufactured with a rotational spinning technique. Phase separation of soluble solutions or emulsions was induced within a filled mold as it was being rotated about one of its axis. The density difference between phases results in sediment at the inner lumen of the mold under centrifugal forces. After or during sedimentation, gelation of the phase-separated particles fixes the hollow structure morphology and the solvent remains in the center of the mold. The solvent is removed from the mold resulting in a coating or tube. By controlling the rotational speed and the formulation chemistry, the tube dimensions and wall morphology can be manipulated. This technique offers a new approach to the manufacture of polymeric tubes. It requires small quantities of starting material, permits multi-layering of tubes, is applicable to diverse polymers and can result in highly diffusive hollow structures while maintaining good mechanical strength.

A gravity type internal solitary wave maker with a rotary blind door comprises a blind door and a linkage control mechanism, wherein the blind door comprises a plurality of long and thin stainless steel vanes; partition doors formed by all the vanes are arranged in an overlap mode; the overlap parts have good tightness when the partition doors are closed; the linkage control mechanism comprises link rod sliders, a slide guide, a cylinder and a steam pump; each stainless steel vane is riveted with upper and lower axes; all the upper axes are connected one ends of the link rod sliders corresponding to the upper axes; all the link rod sliders rotate around the corresponding upper axes on the vanes; the other ends of all the link rod sliders are connected with a cylinder piston rod; the link rod sliders reciprocate on the slide guide; a cylinder piston drives the link rod sliders to move to drive the upper axes on the vanes to simultaneously rotate 90 degrees while driving the piston rod to reciprocate, thus realizing synchronous opening and closing of the blind door. The movement amplitude of the mechanism generating the internal solitary waves through the interface density difference is greatly reduced, the quality of the made waves is effectively improved and the mechanical device has concise overall structure and is convenient to operate.

The present invention relates to water, including waste water, treating technology. Stuffing with certain specific surface area is thrown into reactor and under sufficient aeration condition and the action of gas density difference, inflecting board and cyclone, the triphase of solid, liquid and gas inside the reactor reaches fluidized state and forms cyclonic circulation. the adsorption and growth of microbes on the stuffing results in even high organic matter eliminating efficiency and the stuffing has certain adsorption to soluble organic matter in water. The suspended microbes in the bioreactor and those in the surface of membrane are reduced. The present invention is especially suitable for use in relatively lower organic matter density. Compared with traditional membrane bioreactor,the present invention can avoid the pollution to membrane and make system operate more stably and at lower power consumption.

The invention discloses a volcanic zone fault sealing comprehensive evaluation method specifically based on Karamay oilfield volcanic rock development area. A volcanic zone fault sealing forming mechanism is mainly lithologic opposition and diagenesis. A lithologic opposition characteristic can be reflected in the aspect of the difference between the density of rock stratums on both sides. The diagenesis of a fault zone is affected by cross section pressure, closeness and the like. Through the filling of argillaceous debris and the injection of late fluid, the fault zone is strongly closed. According to the invention, a concept model of fault plane density difference is established; a variety of parameters (cross section normal stress, closeness index and the like) are combined to evaluate diagenesis closeness and docking closeness; closeness influence factors are induced; a weight factor is proposed; through a weight coefficient, a mathematical model is built to acquire a comprehensive factor; and the fault sealing is comprehensively evaluated. According to the invention, a variety of geological factors are considered; accurate requirements of fault sealing quantitative evaluation can be met; and the method can be widely applied to the field of oil and gas resource geological exploration and development evaluation.

The invention relates to the field of geothermal exploitation and provides a method for exploring dry-hot-rock geotherm through underground heat siphon self-circulation. The method includes the steps that a heat-carrying medium circular flowing channel is built underground, and self-circulation flowing of the heat-carrying medium in the underground channel is achieved by fully utilizing the phenomenon of heat siphon caused by the density difference of the heat-carrying medium at various temperature differences. The circular flowing channel can be achieved by drilling two horizontal well holes in different depth positions of an injection and production well, and can also be achieved by fracturing fractures and an upper horizontal well hole of the well bottom injection and production well. The heat-carrying medium flowing in a circulating mode drives a turbine generator to rotate for power generation in the flowing process, and accordingly the dry-hot-rock geothermal energy is explored as electric energy. According to the method, the heat siphon phenomenon of the heat-carrying fluid is fully utilized, underground self-circulation flowing is achieved, extra power from the outside is not needed, and the method is suitable for geothermal exploration of dry-hot-rock reservoirs with high reservoir temperature and severe ground environment.

The invention discloses a micro-bubble rotational flow separation method and the separation equipment, and belongs to the flotation and the separation fields. The invention applies the principles of the air floating separation method and the swirl nozzle separation method, ore pulp preprocessed by a flotation agent passes through a bubble generator before entering a swirl nozzle, micro-bubble is added into the ore pulp, the bubble and the ore pulp collide and are mineralized, and a three-dimensional elliptic type strong rotating shear turbulent motion is generated after the mixed liquor tangentially enters the swirl nozzle from the periphery of the swirl nozzle with a certain pressure,. Because of the granularity difference (density difference) between the coarse grains (heavy phase) and the fine grains (light phase), the centrifugal force, the centripetal buoyancy force, and the fluid drag force are different, most of the coarse grains (heavy phase) are separated from the bubble and discharged from the bottom opening of the swirl nozzle under the action of centrifugal settling, and most of the fine grains (light phase) are carried by the bubble and discharged from an overflow pipe, thereby realizing the purposes of separation and grading. The micro-bubble rotational flow separation method has the advantages of simplified separation process and device and enhanced processing capacity.

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.

A method of operating a closed photobioreactor for cultivation of phototrophic microorganisms. The photobioreactor comprises a culture liquid and is partially or completely surrounded by water of a water body. A density difference between the culture liquid and the surrounding water is provided so that the position of the photobioreactor in the water body is controlled. A closed photobioreactor for cultivation of phototrophic microorganisms. The photobioreactor is adapted to comprise a culture liquid and to be partially or completely surrounded by water of a water body. The photobioreactor comprises means for determining the density difference between the culture liquid and the surrounding water.

The invention relates to a lightweight wear-resistant density-gradient foamed sole material and a preparation method thereof. The lightweight wear-resistant density-gradient foamed sole material is mainly composed of EPDM, ethylene-octene copolymer, low density polyethylene, a cross-linking agent, a filling material, a foaming agent and a foaming promoter. On the basis of foaming of EPDM, POE and LDPE and through control of a foaming ratio and density difference values of each layer of materials, a heterogeneous expandable rubber compound composed of a plurality of layers and having quasi-continuously changing performances in the thickness direction of the materials are subjected to one-shot mould pressing, foaming and moulding so as to prepare the foamed sole material, and function gradient differences of density, hardness and wear resistance are realized. Due to gradual change of density, stress concentration is mitigated, and the prepared foamed sole material does not warp. The foamed material has low density at one side close to the vola while the foamed material has high density at one side close to the outer sole, so the foamed sole material has good wear resistance, reduces the weight of the sole and has improved wearing comfortableness.

The invention relates to a preprocessing method using redundancy metal filling for realizing layout density uniformity, belonging to the technical field of integrated circuit manufacturing process and layout design. The method can determine the density of each block by a design rule check rule through a pre-setting the block density lower limit and pre-setting the allowable density undulating quantity and then dividing the layout into blocks having the same size. For the method, the density of each block is adjusted to be above the density lower limit, and then the density difference between each block and the adjacent blocks is limited within the preset allowable undulating quantity range, so that the density difference among different blocks is reduced, the uniformity of the metal wire density on the layout is improved, better smoothness is realized and chip quality is improved.

Even if there may exist a difference in reading density between reading positions, there will be provided an image reader capable of accurately detecting and removing streaks-shaped noise caused by the adhesion of dust particles to the reading unit. A CCD reads an original at each reading position, and image data A and B in each reading position are obtained from an output delay circuit and a shading correction circuit. A streak detection circuit judges a difference A−B between each image data through the use of a threshold corrected on the basis of an average density difference between each image data A and B, and outputs black streak detection data in accordance with the judgment result. A streak removal circuit always outputs the image data A, but if black streak detection data is outputted, image data B corrected on the basis of the average density difference is outputted in place of the image data A.

The invention discloses a sorting device for a coarse coal slime interference bed based on gravity and interfacial force, a method and application thereof, wherein air bubbles are introduced into the sorting device of the interference bed. Under the action of ascending water flow, an environment similar to heavy medium sorting is formed by using fluidization of fine coal slime carried in fed materials; and the introduced air bubbles are attached to hydrophobic low density particles so that the real density of an air bubble-hydrophobic particle polymer is reduced and the density difference between head coals and minerals is increased. The sorting device realizes the sorting based on the combined action of gravity and interfacial force in a solid-liquid-gas three-phase interference bed, has large adaptation range to the particle size of the fed materials and high sorting precision, can effectively sort coarse coal slime which has wide level and is difficult to sort, and is in particular applicable to the sorting of the coarse slime of which the particle diameter is between 2 and 0.3 millimeter.