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2435results about How to "Small pressure drop" patented technology

Atmospheric vacuum distillation method and apparatus with vacuum flash vaporizer

The invention relates to an atmospheric and vacuum distillation device with a vacuum flash tower and a method thereof. The atmospheric and vacuum distillation device with a vacuum flash tower is characterized in that the vacuum flash tower arranged in front of a vacuum furnace is connected with the vacuum furnace and a vacuum tower through a pump and a pipeline. Constant bottom oil (1) is introduced into the vacuum flash tower (2)at first, and the operation pressure at the top part of the vacuum flash tower is higher than the operation pressure at the top part of the vacuum tower (9) by10 to 200mmHg; Flash cap gas (3) is introduced into the upper part or the lower part of an outlet for a side product which is similar to Flash cap gas fraction; flash bottom oil (5) is introduced into the vacuum furnace (7) through a flash bottom oil pump (6); when the flash bottom oil is heated to 350 to 430 degrees, air-liquid mixing vacuum tower feed material is obtained through partial vaporization and is introduced into a flash evaporation segment (10) of the vacuum tower through a transfer line (8); and products with different fractions are drawn from the side of the vacuum tower and vacuum residue is drawn from the bottom of the vacuum tower. Through adding the vacuum flash tower to improve the working process of the atmospheric and vacuum distillation device, the invention achieves the advantages of increasing treatment capacity, increasing vacuum distillation yield, and reducing energy consumption.
Owner:TIANJIN UNIV +2

Protective agent of coal tar hydrogenation catalyst and preparation method of protective agent

The invention discloses a protective agent of a coal tar hydrogenation catalyst and a preparation method of the protective agent. The protective agent is composed of three parts, namely carriers, active components and assistants, wherein the carriers include aluminium oxide and zirconium oxide in common; the active components include oxides of molybdenum, nickel or tungsten in common and account for 1-10% of total mass of the catalyst; the assistants include potassium and phosphorus in common, and account for 0.5-6% of total mass of the catalyst, and the balance is the carriers. The preparation method comprises preparation of the carrier and preparation of the protective agent. The protective agent has the advantages that the carrier comprises fine holes and thick holes, of which the apertures are relatively concentrated, wherein the thick holes are beneficial to containing metal impurities and carbon residue; a pressure drop of a catalyst bed is reduced, the hydrogenation catalyst is protected, removal of metal impurities such as vanadium is facilitated by the thin holes, the demetallization activity of the protective agent is properly improved, and different pore volumes and hole distribution of carriers can be prepared by adjusting the ratio of two pore forming materials. In addition, the preparation method of the protective agent is simple in technology, and convenient and stable to fabricate.
Owner:NINGBO JINYUANDONG PETROCHEM ENG TECH +1

Mini reforming hydrogen-preparation reactor

InactiveCN101054160ARapid reforming hydrogen production reactionEven air distributionHydrogenHydrogenFuel cells
A minitype reactor for reforming hydrogen, which main part has telescopefeed structure, comprising a burning offgas heat exchange cavity, a reforming offgas heat exchange cavity, a burning cavity and a reforming cavity in sequence from outside; a fuel inlet is arranged communicating with the burning cavity; a reforming material inlet is arranged communicating with a built-in cavity of the burning offgas heat exchange cavity; reforming material liquid is preheated in the built-in cavity of the burning offgas heat exchange cavity then supplied into a built-in cavity of the reforming offgas heat exchange cavity; reforming material liquid flows in built-in cavities, burning offgas and reforming offgas exchange heat via tube wall of built-in cavities and flow oppose to reforming material liquid; a reforming air inlet is arranged, mixture gas of reforming air mixing with gas phase vaporized in the reforming offgas heat exchange cavity is supplied into the reforming cavity to process reforming hydrogen reaction. The catalytic burning reaction and reforming reaction of the invention has advantages of temperature easy to be control, stable running, easy operation; compact structure; the invention is suit for hydrogen source system of 10-500 W fuel cell minitype electrical source.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI

Lithium battery and manufacturing method thereof

The invention discloses a lithium battery and a manufacturing method thereof, which belong to the field of batteries. The lithium battery comprises a positive pole, a negative pole and a diaphragm arranged between the positive pole and the negative pole. The manufacturing method comprises the following steps: making active matters into a mixed paste; preserving blank positions on the front and back sides of an edge in the lengthwise direction of a positive pole piece, coating the paste on other parts of the positive pole piece completely, preserving blank positions on the front and back sides of an edge in the lengthwise direction of a negative pole piece, and coating the paste on other parts of the negative pole piece completely; covering the pasted positions of the negative pole piece with the diaphragm, placing the positive pole piece, and staggering the blank positions of the positive pole piece and the blank positions of the negative pole piece at two ends respectively to arrange the positive pole with blanks at one end and the negative pole with blanks at the other end; welding the blanks of the positive pole with a positive pole tab and the blanks of the negative pole with a negative pole tab; and placing a battery cell welded with the pole tabs in a packaging shell, packaging the shell, drying the shell under vacuum, filling liquid, sealing the shell, and obtaining the battery after formation, capacity grading and examination. The lithium battery and the method have the advantages of reducing the distance from the pole pieces to pole terminals, internal resistance and heat generated during charge and improving safety, reducing pressure drop caused by internal resistance and discharge platform.
Owner:GUANGZHOU FULLRIVER BATTERY NEW TECH

Concentric ring adverse current type hypergravity swinging bed device

The invention provides a concentric circularity counter-flow type super-gravity rotating packed bed, which comprises a shell, a liquid-phase inlet and a gas-phase outlet arranged on the upper end surface of the shell, a gas-phase inlet and a liquid-phase outlet arranged on the lower end of the shell, a rotating body arranged on the center of the shell, and a rotor connected with the rotating body, wherein the rotor comprises a rotating disc permanently connected with the rotating body and a static disc permanently connected with the shell, the two sides of the lower end of the rotor are provided with first access points, the center of the upper end of the rotor is provided with a second access point, the second access point is communicated with the gas-phase outlet and the liquid-phase inlet, and the first access points are communicated with the gas-phase inlet and the liquid-phase outlet; the rotor also comprises a concentric mesh moving coil, the concentric mesh moving coil is composed of a group of rotating coils which are concentric with different diameters and have meshes, the bottom end thereof is permanently connected on the rotating disc, the upper end is rotationally connected with the static disc, and the first access points and the second access point are communicated with the channel of the concentric mesh moving coil. The invention proposes the concentric circularity counter-flow type super-gravity rotating packed bed with low pressure drop, small rotor liquid holdup and better application effect.
Owner:ZHEJIANG UNIV OF TECH

Multi-layer fluidized bed two-stage activated carbon/coke flue gas simultaneous-desulfurization and denitrification system and method

The invention relates to the field of industrial flue gas pollution control. A multi-layer fluidized bed two-stage activated carbon / coke flue gas simultaneous-desulfurization and denitrification system of the invention comprises a dust removal device (4) and further comprises a desulfurization and denitrification multi-layer fluidized bed reactor (13), wherein a feed port of the dust removal device (4) is communicated with the top of the desulfurization and denitrification multi-layer fluidized bed reactor (13); the desulfurization and denitrification multi-layer fluidized bed reactor (13) is divided into an upper denitrification section and a lower desulfurization section; the denitrification section comprises several layers of fluidized beds; an ammonia gas injection port (10) is formed in a side wall corresponding to a position below the bottom of each layer of fluidized bed; the desulfurization section comprises several layers of fluidized beds; a flue gas inlet (7) is formed in the side wall corresponding to the position below the bottom of a lowest layer of fluidized bed. The system provided by the invention can enhance the mass transfer and heat transfer, improve the efficiency of desulfurization and denitrification, replace high-cost formed activated carbon / coke with fine granular activated carbon / coke to reduce the costs for desulfurization and denitrification, and is suitable for the flue gas purification of power plant boilers, industrial boilers, heating boilers and coking industry.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

Activated carbon coating/foam silicon carbide structural catalyst and preparation method thereof

The invention relates to the field of structural catalysts, in particular to an activated carbon coating / foam silicon carbide catalyst with a three-dimensional communicated structure and a preparation method for the catalyst. The invention aims to solve the problems that hole opening is discontinuous, the catalyst and reaction products are separated, a heat transfer and mass transfer effect is poor and the like in the prior art. By taking foam silicon carbide as a catalyst carrier, an activated carbon coating covers on the surface of the foam silicon carbide, wherein the activated carbon coating is between 0.1 micron and 500 microns thick, and a metal catalysis active component is loaded on the activated carbon coating. The activated carbon coating is prepared on the surface of the foam silicon carbide with the three-dimensional communicated structure, then, the metal catalysis active component is loaded, and activating treatment is performed on the metal catalysis active component to obtain the catalyst. According to the activated carbon coating / foam silicon carbide catalyst, holes in the catalyst carrier are totally communicated, thus, an enclosure space does not exist, and a heat transfer and mass transfer process of the chemical reaction can be strengthened. The activated carbon coating / foam silicon carbide catalyst has the characteristics that the temperature field distribution of the catalytic reaction is uniform, the heat inactivation rate is low, the pressure drop is low and the like.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI

Low-moisture low-variable serial saturation tower thermal CO transformation technology

The invention relates to low-moisture low-variable serial saturation tower thermal CO transformation technology, which comprises the following steps: after processing gas-liquid separation, heat exchange and detoxification to crude gas, feeding the crude gas into a pre-transformation furnace to process initial transformation reaction; controlling the mol ratio of crude gas water/dry gas which enters the pre-transformation furnace within 0.19-0.23, and controlling the temperature thereof within 200-220 degrees centigrade; feeding pre-transformed mixing gas from a crude pre-heater into a saturation tower and contact with technical circular water of a hot water tower reversely so as to transmit heat and quality; increasing humidity and temperature of the pre-transformed mixing gas, feeding into the pre-transformed mixing gas into an isothermal transformation furnace so as to process depth transformation; exchanging gas and heat of the isothermal exchange gas of the isothermal transformation furnace so as to feed into the hot water tower to transmit the heat and quality; and recycling low-order heat energy. Compared with the prior art, the isothermal transformation furnace substitutes at least two grades of heat isolating transformation furnaces; the number of transformation furnaces is reduced; equipment investment and catalyst cost are saved; in addition, a transformation procedure is short, resistance is small, energy consumption is low and operation is stable.
Owner:CHINA PETROCHEMICAL CORP +2

Fast recovery diode (FRD) chip and production process thereof

The invention relates to a fast recovery diode (FRD) chip and a production process thereof. A diode with a P+NN+ structure is produced by adopting the process steps of diffusion pretreatment, double diffusion of a liquid source, back thinning, oxidization, platinum diffusion, photoetching, mesa etching, electrophoresis, sintering, scribing and the like. In the chip production process, a method of carrying out deep junction diffusion by carrying a liquid phosphorous source is adopted, so that the flatness of a diffusion junction is improved and the homogeneity and the stability of a breakdown voltage are strengthened; a method of reducing the concentration of a boron diffusion source and improving the purity of the boron diffusion source is adopted, so that the surge resistance capacity of an FRD is improved; and an electrophoresis glassivation process is adopted, so that the voltage withstanding stability and reliability of a bidirectional voltage stabilizing diode are improved. In addition, the production process has the advantages that the reverse recovery time is shortened, the switching speed is improved, the voltage drop is reduced, the power consumption is reduced, the voltage withstanding stability is improved, and the reliability of the diode is improved.
Owner:TIANJIN ZHONGHUAN SEMICON CO LTD
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