281results about How to "Small circulation resistance" patented technology

The invention discloses a supercharged diesel engine EGR (Exhaust Gas Recirculation) system intelligent cooling device, comprising an EGR mixer (3), a mechanical water pump (4), an electric control fan (5), a radiator (6), a thermolator (11), an EGR cooler (13), an electric control EGR valve (14), an engine ECU (Electronic Control Unit) (18), a temperature sensor (19), an exhaust gas intercooler (8) and an electric control two-position three-way valve (12), wherein an inlet of the electric control two-position three-way valve (12) is communicated with a gas outlet of the EGR cooler (13); outlets in two ends of the electric control two-position three-way valve (12) are respectively communicated with an exhaust gas inlet of the EGR mixer (3) and a gas inlet of the exhaust gas intercooler (8); a gas outlet of the exhaust gas intercooler (8) is communicated with the exhaust gas inlet of the EGR mixer (3); the electric control EGR valve (14), the electric control fan (5), the temperature sensor (19) and the electric control two-position three-way valve (12) are respectively connected with the engine ECU (18) electrically.

The invention discloses a preparation method of a ceramic filtering membrane supporting body. The method comprises the steps of (1) preparing a raw material, wherein the raw material comprises mixing powder, namely alpha aluminium oxide powder (1) the purity of which is greater than or equal to 99.7% and alpha aluminium oxide powder (2) the purity of which is greater than or equal to 99.8%, the median particle diameter D50 of the alpha aluminium oxide powder (1) is 18-35mum, the median particle diameter D50 of the alpha aluminium oxide powder (2) is 0.8-2mum, and the dosage of the alpha aluminium oxide powder (2) is 2%-10% (weight) of that of the alpha aluminium oxide powder (1); (2), mixing the mixing powder with a water solution of cross-linking agent acrylamide and methylene double crylic acid ammonium to form a suspension, and carrying out gel casting on the suspension; heating a formed product to 40-55 DEG C in a microwave manner, drying for 1-3 hours, calcining the dried formed product for 4-8 hours under 500-800 DEG C in air atmosphere, placing a calcined product in vacuum or atmospheric hydrogen or argon atmosphere, carrying out heat preservation on the calcined product for 4-12 hours under the condition of 1800 DEG C-1950 DEG C so as to form a supporting body of a pure alpha phase aluminum oxide ceramic filtering membrane. The preparation method provided by the invention has the advantages that the porosity of a product is high, the flux is high, and the product is strong-acid-resisting and strong-alkali-corrosion-resisting.

The invention discloses an arsenic adsorbing fiber using acrylic fiber as a fundamental frame and a synthesizing method thereof, belonging to the technical field of polymer materials. In the structure of the fiber material, amido existing in a mode of hydrochloride is contained, and the amido can effectively adsorb arsenic radical in the water through an ion exchange reaction. The method for synthesizing the fiber is to lead the acrylic fiber to firstly perform a grafting reaction with a multi-amido compound to introduce amido, and the acrylic fiber reacts with the hydrochloric acid to transform the amido into the hydrochloride, and has simple reacting process and mild condition. The neutral fiber is stable in the air, cannot absorb carbon dioxide and other acid gases, and cannot affect the pH value of the water body when the arsenic adsorbing fiber is used in the water as an adsorbent.

The invention relates to an ultra-thin flat heat pipe and a manufacturing method thereof. A wick comprises a porous medium bottom layer and a plurality of porous medium filaments arranged side by side; the porous medium filaments make contact with the top of a tube shell; the wick inside the heat pipe, a sharp angled area between the porous medium filaments and the upper surface of the tube shell, and a sharp angled area between the porous medium filaments and the porous medium bottom layer provide liquid return capillary driving force which is large enough in a limited space; spaces formed between the porous medium filaments provide steam flow channels, and the steam flow channels communicate with one another; and reasonable matching of vapor-liquid phase distribution is achieved, and steam and condensed liquid can flow easily. According to the ultra-thin flat heat pipe, efficient operation can be maintained at various angles, the performance of anti-gravity operation is excellent, the heat flux which can be borne by the heat pipe is high, and the heat transfer performance of the heat pipe is remarkably improved after further modification treatment.

A glass vacuum solar heat collection tube of through two-end type consists of external glass tube, internal tube with corrugated body, absorption coated layer, elastic support and degasser. It is featured as setting space between two said tubes to be vacuum cavity, melt-jointing two ends of two said tubes to be an integral body for sealing two ends with each other and setting circular wave form ledges on internal tube to be distributed in mode of group wave ledges being not continuously set.

The invention relates to a fixed tube-sheet heat exchanger with a temperature control function. A head structure and a tail structure are respectively arranged at two ends of a shell, at least one heat exchange pipe is arranged in the shell, tube pass fluid flows out from a head cavity and flows in a tail cavity from the heat exchange pipe, a shell pass inlet and a shell pass outlet are arranged on the shell, the fixed tube-sheet heat exchanger with the temperature control function is characterized in that a central channel is also arranged in the shell, a heat-insulating layer is arranged on the inner wall of the central channel, the tube pass fluid flows out of the head cavity and flows in the tail cavity also by the central channel, the heat exchange between the tube pass fluid in the central channel and shell pass fluid can be isolated by the heat-insulating layer, at least one annular baffle plate and at least disc type baffle plate are also simultaneously arranged in the shell, and the tail cavity at least comprises one mixed cavity. The fixed tube-sheet heat exchanger with the temperature control function has the following beneficial effects that the heat exchange coefficient of the heat exchanger is effectively increased, the heat exchange area can be reduced, and the manufacturing cost of equipment can be lowered; the temperature control structure can ensure the running stability of the heat exchanger under variable working conditions, and guarantee the steady-state operation of downstream equipment of the heat exchanger.

The invention discloses a drying smoke desulfurizing method by using combined smoke jet. The character is that it adds a smoke jet nozzle above the water nozzle and desulfurizing agent muzzle. It realizes the fully combination of gas, solid and liquid in the desulfurizing reaction tower, increases the desulfurizing efficiency.

The invention relates to a low flow resistance check valve with high sealing force. The low flow resistance check valve is characterized in that the low flow resistance check valve is provided with a valve body, a valve cap and a valve rod, wherein an inlet and an outlet are formed in the valve body; a central line of the inlet and a central line of the outlet of the valve body are arranged by 90 degrees; the valve cap is mounted on an outer plane of the valve body, which is opposite to the inlet; a permanent magnet is mounted in an inner hole of the valve cap; central lines of the valve cap, the valve rod and the inlet are consistent; the valve rod comprises rod parts arranged at two ends of the valve rod and disks positioned on the intermediate sections of the rod parts; the rod parts are respectively matched in holes of the valve cap and a guide plate of the inlet in a sliding way; the disks and corresponding annular blade edges of the valve body form a valve; and a spring is mounted on the valve rod between the disk and the valve cap. Due to the adoption of common action of a strong magnetic force and a spring force, the low flow resistance check valve has the characteristics of high sealing force and low flow resistance.

The invention relates to a tangential gas intake desulfurization tower of flue gas desulfurization technology of a semi-dry circulating fluidized bed. The tower is characterized in that: a flue gas intake structure is tangentially connected with the desulfurization tower, a desulfurizer inlet is positioned at the central position of the bottom of the desulfurization tower, a feed back inlet is positioned at the lower part of the desulfurization tower and a flue gas outlet is positioned at the top of the desulfurization tower. The tangential gas intake desulfurization tower has the advantages of causing the flue gas to form strong rotating flow in the desulfurization tower, improving turbulent intensity of gas flow, maintaining full contact between a desulfurizer and the flue gas, and intensifying desulfurization reaction process and greatly improving the utilization ratio of the desulfurizer; and the tangential flue gas intake structure can help effectively lower pressure drop of the system.

The invention relates to a micro-miniature catalytic burner taking a foam metal as a catalyst structure substrate. The micro-miniature catalytic burner comprises an outer side sleeve, an inner side sleeve A and an inner side sleeve B. Pre-mixed fuels pass through a reactant inlet, a reactant inlet channel and an inlet of a catalytic combustion reaction chamber in sequence, and then enter the catalytic combustion reaction chamber so as to generate catalysis and combustion reaction on the surface of an integral catalyst taking the foam metal as the structure substrate; then, the pre-mixed fuels pass through a product channel inlet, a product channel, a backheating channel inlet, a backheating channel and a tail gas outlet. In a process of flowing a product mixture (high-temperature smoke gas) through the backheating channel, on one hand, most of heat is transmitted to a thermoelectric conversion material on the surface of the outer side sleeve, so that a process of converting heat into electricity is completed; on the other hand, part of heat is transmitted into a pre-mixed recant in the reactant inlet channel, so that microscale combustion stability is improved. The foam metal is taken as the structure substrate of the integral catalyst, so that the activity and the combustion stability of the catalyst are improved.

The invention relates to a U-shaped plate type dielectric-barrier-discharge-based low-temperature plasma reactor and reactive system. The reactor comprises a core electrode, a U-shaped plate electrode housing, an insulating medium and a driving power. The core electrode is installed inside the U-shaped plate electrode housing; and gas outlet channel parallel to the core electrode is arranged at the arc position of the U-shaped plate electrode housing. The insulating medium is installed between the core electrode and the U-shaped plate electrode housing. The driving power is respectively connected with the core electrode and the U-shaped plate electrode housing. Gas enters the reactor through a U-shaped opening of the U-shaped plate electrode housing; and the processed gas leaves the reactor through the gas outlet channel. According to the reactor, large-flow gas can be processed; the gas disturbance can be enhanced and the plasma catalysis can be strengthened; the mixed uniform degree of several kinds of gas can be improved; the dielectric barrier discharge (DBD) breakdown voltage and discharging power are low and the waste gas treatment cost can be lowered; and the reactor can work separately or work in a matrix arrangement mode.

The invention discloses a microchannel heat exchanger, a refrigerator and an air-cooled refrigerator. The microchannel heat exchanger comprises two header pipes, multiple heat exchange pipes and fins. The two header pipes are arranged in parallel. The two ends of the multiple heat exchange pipes are connected with the two header pipes correspondingly. The multiple heat exchange pipes are bent in the length direction to form multiple pipe layers. The refrigerant circulation resistance of some heat exchange pipes is smaller than that of the rest of the heat exchange pipes. Each fin is arranged between every two adjacent pipe layers or arranged on the outer side of the outermost pipe layer. In the extending direction of the heat exchange pipes, each fin extends in a corrugate shape. In the extending direction of the heater pipes, each fin continuously extends. The fins are provided with air holes. According to the microchannel heat exchanger, the problem that a large amount of water is attached to fin surfaces and cannot be thoroughly drained is solved, and the phenomenon that dense ice is produced on the surface of the microchannel heat exchanger, and therefore heat exchange efficiency is affected can be prevented. In addition, the defrosting period can be prolonged, the refrigerant flow of the multiple heat exchange pipes is promoted to be uniform, and heat exchange performance is improved.

The invention discloses a mixer. The mixer comprises a mixing section and an expanding section, wherein one end of the mixing section is provided with a urea nozzle base, and the mixing section is used for mixing waste gas with urea in the mixer; and the pipe diameter of the expanding section is larger than that of the mixing section, one end of the expanding section is provided with a port matched with the pipe diameter of the mixing section, and the other end of the mixing section is connected with the port. According to the mixer, the mixing section and the expanding section of the mixer are directly connected, and thus, after mixing is completed, the waste gas and the urea directly enter the expanding section; and the pipe diameter of the expanding section is larger than that of the mixing section, thus, when the mixed gas enters the expanding section, the pipe diameter is suddenly changed, the circulation resistance is reduced, acoustic impedance change is caused, accordingly, part of sound waves spreading along a pipeline is reflected back to a sound source, and the gas flow generates the capacity for reducing the sound at the specific frequency band. Thus, through the mixedprovided by the invention, an aftertreatment mixer can be optimized, the good acoustic performance is achieved, and the problems in the field at the present stage are solved.

The invention discloses a gas distributor for gas-liquid dispersion, which can efficiently disperse gas into liquid. The gas distributor comprises a gas distribution chamber, a gas outflow element arranged on a shell of the gas distribution chamber, and a guide flow cylinder which is arranged in the gas distribution chamber and communicated with a gas inlet pipe, wherein the gas distribution chamber is in the conventional shape or in an apple-shaped bottom structured spherical shape, oblate spheroid shape or flying saucer shape; a longitudinal section of the guide flow cylinder is in a hyperbolic shape or a cylindrical shape; and the gas outflow element is a spiral nozzle, a kerf conical nozzle, a straight pipe or conical pipe with a built-in spinning disk, a jet mixer or a micropore blind pipe. The gas distributor has the advantages of good dispersion effect, less possibility of blockage, high suitability for liquid materials and simple structure.