233results about How to "Reduce pressure drop" patented technology

The invention relates to a taper core type supersonic condensation cyclone separator, belonging to the technical field of expansion refrigeration and condensation separation of pressure gas. The taper core is inserted in a passage, and the diameter of the taper core is changed at different places, so as to form the passage with a gradually decreased section part, a constant throat part and a gradually increased section part; therefore, a constant diameter inner hole can be adopted to avoid gradually increased small taper pipe passage which is difficult to be machined, so that the spin strength is not weakened due to the diameter increase. The taper core type supersonic condensation cyclone separator enables low-temperature working condition by means of pressure expansion and cooling of the gas, and reinforces spin by means of diameter decrease to generate strong centrifugal force field. The pressure can be increased after separation. The taper core type supersonic condensation cyclone separator has the advantages of no moving pieces, no need of external drive, energy saving, compact size, low cost, stable and reliable operation, and applicability to condensation separation of mixed gas with high pressure and low flow rate and separation of heavy components of natural gas and petroleum gas, in particular to offshore platform and other occasions with limited space due to compact size.

A cooling tower is provided with a housing containing a fan at the bottom of the tower, and a plurality of layers of water collection troughs or channels above the fan to capture water droplets sprayed downwardly from the top of the device through an evaporative cooling pad located above the collection troughs. The collection troughs extend from one side of the housing to the other in the form of a structural support for the housing and the equipment therein. The troughs have open ends which extend through the housing to discharge collected water to an adjacent vertical tank.

The invention relates to a nanofiber filter material which comprises at least one porous nanofiber layer formed by continuous polymer fibers with a diameter less than 1000 nm. The nanofiber filter material is characterized in that the nanofibers are prepared by the solution jet spinning technology, the gram weight of each nano-layer is at least 1.5 g/m<2>; the nanofibers are in a three-dimensional curled state, the porosity of the fiber layer is more than 95%, and the proportion of the pores having an aperture of 1-10 micron in the fiber layer is more than 95%. When particles having a mean grain size of 0.3 micron are filtered at a surface speed of 5.33 cm/s, the filtration efficiency of the filter material nanofiber layer is at least 40%, the initial pressure drop is less than 8 mmH2O, and the filtration quality factor QF of the filter material is higher than 0.06 (1/mmH2O). The nanofiber filter material provided by the invention has a filtering property with high efficiency and low resistance.

The invention relates to a fracturing technology for implementing the ultrahigh flow conductivity, which comprises the following steps: 1, judging whether geomechanics parameters of a target reservoir is suitable for the fracturing technology disclosed by the invention or not; 2, judging whether completion perforation of a target well is suitable for the fracturing technology disclosed by the invention or not, and if no, changing a perforating scheme of a well bottom; 3, before fracturing, selecting related fracturing materials; 4, carrying out fracturing on the target well by using a unique pumping program of the fracturing technology disclosed by the invention. According to the fracturing technology, proppant struts are formed in a stratum; flow conductivity of a stratum fracture is not improved by a filling layer of a proppant, but oil gas passes through by passages between the proppant struts; the flow conductivity is obviously improved by the open flowing passages; the flow conductivity of an existing conventional fracturing technology is not more than 200mum<2>*cm generally, but the flow conductivity of the fracturing technology for implementing the ultrahigh flow conductivity, which is disclosed by the invention, is higher than that of the conventional fracturing technology by 1 to 3 orders of magnitude; the fracturing technology reduces a pressure drop in the fracture, is helpful for improving drainage capacity and increases the effective fracture half-length and the production increase volume of the reservoir so as to improve yield.

The invention discloses a display panel driving circuit, a display device and a display panel driving circuit's driving method. The display panel driving circuit comprises a control module, a source electrode driving module and a gate electrode driving module in connection with the control module. The control module, through the gate electrode driving module and the source electrode driving module, outputs a scanning signal and a data signal respectively. Between the control module and the gate electrode driving module, a power amplification module is arranged. The power amplification module is connected with the control module and the gate electrode module. The scanning signal outputted from the control module is amplified by the power amplification module, and then enters the gate electrode driving module. The amplified scanning signal is capable of increasing the driving capability of the signal current on the line, and is able to quicken the responding time, reduce the signal deformation, solve the weakening problem and increase the power charging efficiency.

A particulate matter-removing filter being resistant to clogging and ash blocking, requiring no special means such as back-washing and heating combustion, and being formed of inexpensive materials; and exhaust emission controlling method and device using this. (1) A particulate-matter-containing exhaust emission controlling filter which uses as a basic unit a pair of porous corrugated sheet and a porous flat sheet that support an exhaust emission controlling catalyst, has a molding formed by laminating the porous corrugated sheets so that their ridge lines alternately cross perpendicularly, has one of side surfaces, perpendicularly crossing the corrugated sheet ridge lines, of the molding or mutually-adjoining two surfaces that are the perpendicularly-crossing side surfaces sealed, and has exhaust gas in-flow passage and out-flow passage respectively formed between porous corrugated sheets via a porous flat sheet. (2) A filter having the exhaust emission controlling catalyst that is an oxidizing catalyst for oxidizing nitrogen monoxide in an exhaust gas.

The invention provides a separation and pressure reduction combining system for suspended bed hydrocracking reaction products. The system comprises a heat high-pressure separator, a pressure relief valve bank and a heat low-pressure separator, wherein a feeding hole for the suspended bed hydrocracking reaction products is formed in the upper part of the heat high-pressure separator; a cold hydrogen feeding hole is formed in the lower part of the heat high-pressure separator; a heat high-pressure separating gas outlet is formed in the top part of the heat high-pressure separator; a heat high-pressure separating liquid outlet is formed in the bottom of the heat high-pressure separator; the pressure relief valve bank comprises at least one set of valve bank; each set of valve bank comprises a venturi throttling element and an angle adjusting valve which are communicated with each other; a heat low-pressure feeding hole is formed in the upper part of the heat low-pressure separator; a heat low-pressure separating gas outlet is formed in the top of the heat low-pressure separator; a heat low-pressure separating liquid outlet is formed in the bottom of the heat low-pressure separator; the heat high-pressure separating liquid outlet is communicated with the venturi throttling element of the pressure relief valve bank; and the angle adjusting valve is communicated with the heat low-pressure feeding hole. The invention also provides a pressure reduction and separation method for the suspended bed hydrocracking reaction products by using the separation and pressure reduction combining system.

A wide format printer that has a drive roller for feeding different sizes of media along a media path at least 432 mm (17 inches) wide, an inkjet printhead assembly for printing the media and an ink aerosol collection system for removing ink aerosol from areas adjacent the media path. The ink aerosol collection system is configured to remove aerosol at a greater rate in response to an increase in the media size.

A wide format printer that has a print zone, a media path more than 432 mm (17 inches) wide and extending through the print zone along a paper axis, a printhead carriage with a plurality of printhead mounting sites for mounting a plurality of printhead modules adjacent the print zone such that the printhead modules collectively span the media path, the printhead carriage having a long side extending transverse to the paper axis, the long side having access formations for ink conduits and a plurality of interfaces for connection to the ink conduits to supply ink to each of the printhead modules respectively. All ink for the plurality of printhead modules is supplied by ink conduits extending through the access formations on the long side of the printhead carriage.

The invention relates to a flow meter used in liquid or gas medium, which includes one measuring channel (1) flowed through medium, at least one inlet passage, at least one exit passage and at least one ultrasonic wave transducer couple pairs (2, 3), wherein, at least one reflector couple pairs (4, 5) is disposed in the measuring channel (1) for transporting one ultrasonic wave signal from one ultrasonic wave transducer (2 or 3) to another ultrasonic wave transducer (2 or 3). The diameter of the measuring channel (1) is decreased partly by one reduction part (7) to guide through flow, wherein, the reduction part (7) is comprised of insert of measuring channel disposed or combined on the inner wall (6) of the measuring channel, meanwhile the reduction part is keeper or stationary object for using in other functional parts. Furthermore, the invention also relates to a flow meter, wherein, one flow guide plate as fixed plate of reflector couple pairs extends upwards on the measuring channel. In another implementing case, at least two measuring sections are disposed, which includes at least one reflector couple pairs and one ultrasonic wave transducer couple pairs respectively.

A lift truck is provided comprising: a power unit assembly comprising a power unit base, a wheel coupled to the base, and a system for driving the wheel; and a main frame assembly detachably connected to the power unit assembly. The main frame assembly comprises a main frame base, a mast assembly coupled to the main frame base, a carriage assembly coupled to the mast assembly, and hydraulic drive apparatus coupled to the mast assembly. Preferably, substantially the entirety of the hydraulic drive apparatus is provided on the main frame assembly such that the main frame assembly is detachable from the power unit assembly without requiring disconnecting hydraulic connections to the power unit assembly.

The disclosure provides in one embodiment for a vent dam for use in a vent stringer in a fuel vent system. The vent dam comprises a contoured guiding surface for guiding fluid flow in a vent stringer. The vent dam further comprises one or more side flanges extending from the contoured guiding surface for providing attachment of the vent dam within the vent stringer.

The invention discloses a blast-furnace coal powder injection method and a system thereof. The method comprises the following steps: A, arranging coal powder stored in a coal powder bin in an injecting tank of an injecting tank group; B, pressurizing the injecting tank by using the high pressure gas obtained from a factory-supplied gas system, and injecting the coal powder into a blast furnace; and C, depressurizing the high pressure gas in the injecting tank, and then directly discharging into the coal powder bin, wherein a step C' needs to be done before the step C, and a step B' needs to be done before the step B. The step C' comprises the following steps: communicating the injecting tank with a gas container, and depressurizing the gas container by using the injecting tank. The step B' comprises the following steps: communicating the injecting tank with the gas container, and pressurizing the injecting tank by using the gas container. The invention can realize the effective recycle of the gas depressurized by the injecting tank, reduce the gas consumption of the powder making and injecting system, save the production cost, reduce the depressurized pressure difference of the depressurization system, decrease the maximum instant depressurized gas flow, reduce the impact on pipelines in the depressurization process, improve the operation stability of the system, and achieve high gas recovery rate.

The invention relates to an aluminum steel compound board. The aluminum steel compound board comprises a substrate steel plate and a composite aluminum alloy plate, wherein the compound board is formed by different temperature rolling and compounding to a steel plate heated to the temperature of 100 degrees and 120 degrees and a normal temperature aluminum alloy plate. The invention further relates to a compounding method of the aluminum steel compound board, and the compounding method comprises the following steps: preparing and compounding the required steel plate and the composite aluminum alloy plate; heating the steel plate to reach a temperature of 100 to 120 DEG C; stacking up the heated steel plate and the normal temperature aluminum alloy plate; and rolling and compounding the stacked up steel plate and the aluminum alloy plate. Due to the adoption of the technical scheme provided by the invention, the compound board is processed through a different temperature rolling and compounding method, the compounding and processing rolling reduction is reduced, requirements to rolling equipment are met, moreover, energy consumption is lowered, and the compounding and rolling cost is reduced.

The invention belongs to the technical field of continuous production of aqueous polyurethane dispersion and provides a continuous production system for preparing aqueous polyurethane dispersion, a continuous production process of the aqueous polyurethane dispersion and application of the aqueous polyurethane dispersion. The continuous production process comprises the following steps: (1) reactingpolyisocyanate with oligomer polyol in a first tubular reactor VR1 to obtain a prepolymer I, wherein the oligomer polyol is divided into four parts when the oligomer polyol is added into the VR1; (2)reacting the prepolymer I with a non-ionic hydrophilic compound in a second tubular reactor VR2 to obtain a prepolymer II, wherein the non-ionic hydrophilic compound is divided into three parts whenthe non-ionic hydrophilic compound is added into the VR2; (3) diluting the prepolymer II and a solvent in a VR3; (4) reacting the diluted prepolymer II with hydrophilic chain extending agent and smallmolecule diamine in a VR4; and (5) emulsifying and dispersing in a VR5. The process is capable of achieving rapid, efficient and continuous production of the aqueous polyurethane dispersion.

A printing system that has an ink supply, a feed line coupled to the ink supply, a return line coupled to the ink supply, a plurality of printheads each coupled to the feed line and the return line and a pumping system configured to generate fluid flow from the feed line to the return line via the printheads to prime the printheads.

A wide format printer that has a vacuum platen assembly, a printhead assembly spaced from the vacuum platen assembly, a media path extending between the vacuum platen assembly and the printhead assembly and a media encoder embedded within the vacuum platen assembly wherein, the media path is greater than 432 mm (17 inches) wide.

The invention relates to a novel multi-bed radial fixed bed reactor which is distributed in a barrel shape. The novel multi-bed radial fixed bed reactor comprises a raw material inlet, catalyst beds, high-density porcelain balls, a ring-shaped channel, a center channel, a center channel distributor, a ring-shaped channel distributor, outer side grids, inner side grids, a reactant outlet and baffles, wherein the raw material inlet is formed in the top of the reactor, and the reactant outlet is formed in the bottom end of the reactor; the catalyst beds are distributed in the reactor along the radial direction in a ring barrel shape; the center channel is arranged in the center of the reactor, and the ring-shaped channel is arranged around the outer ring of the catalyst beds; the center channel and the ring-shaped channel are respectively provided with the baffles; the high-density porcelain balls are arranged on the baffles; the outer side grids are arranged at the outer sides of the catalyst beds, and the inner side grids are arranged at the inner sides of the catalyst beds. The novel multi-bed radial fixed bed reactor has the advantages that the sectional feeding proportion can be flexibly adjusted, and the bed pressure drop is effectively reduced.

A silencer that comprises a casing, one or more pipes or passages leading a flow of gas to the casing and a device for leading gas from the casing. The silencer further has at least one internal chamber, one or more flow inlets to the chamber and one or more flow outlets from the chamber, and one or more flow distributing devices connected to the flow inlet(s) and/or to the flow outlet(s). The flow distributing device comprises one or more walls or profiles extending on a geometrical surface that defines a boundary between an inner volume of the flow distributing device and the chamber. The silencer further has one or more apertures for a flow of gas through the apertures and for leading gas either out of the inner volume into the chamber, or into the inner volume from the chamber. The apertures have a smallest cross-sectional transverse dimension s and a length L, the dimension s being at the maximum 0.2 times the smallest cross-sectional dimension D of the inlet or outlet. The length L is at least the same as the dimension s.

In preferred aspect, the present invention features a membrane humidifier for a fuel cell which can control the amount of air flow and the amount of humidification based on the amount of water produced in a fuel cell stack according to a power level of the fuel cell stack while humidifying dry air and supplying humidified air to the fuel cell stack.