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3772results about How to "Improve absorption efficiency" patented technology

Optical spectroscopy apparatus and method for measurement of analyte concentrations or other such species in a specimen employing a semiconductor laser-pumped, small-cavity fiber laser

An optical spectroscopy apparatus determines the concentration of analyte in a specimen that utilizes a single radiation source which is hybrid laser comprising a semiconductor pump laser and small-cavity rare earth fiber laser where laser cavities of both lasers are butt coupled or otherwise optically coupled to form a plurality of laser cavities that produce a plurality of emission wavelengths, one which may be the pump laser emission wavelength at the output of the fiber laser thereby forming a multi-wavelength combined output where the wavelengths substantially match distinguishing spectral characteristic features along at least a portion of a characteristic optical spectrum of the analyte under examination. In lieu of complex data analysis of these wavelengths to determine values representing the concentration of the analyte in an examined specimen, the semiconductor pump laser or lasers are modulated as a plurality of tone frequencies, where at least a first of the modulation frequencies is below the maximum frequency response of the fiber laser so that the first modulation effectively modulates the pump emission wavelength and a first emission wavelength of the fiber laser in the hybrid laser combined output, and at least a second of modulation frequencies is above the maximum frequency response of the fiber laser so that the second modulation effectively modulates the pump emission wavelength but not the first emission wavelength of the fiber laser in the hybrid laser combined output. Further, one or more additional modulation frequencies may be applied to the pump laser which are intermediate of the first and second modulation frequencies where it is at least responsive to at least one further emission wavelength of the fiber laser and also provided in the hybrid laser combined output.
Owner:THORNTON ROBERT L

Organic/inorganic compound fertilizer taking biomass charcoal as matrix, preparation method of organic/inorganic compound fertilizer and preparation method of fine straw biomass charcoal powder

The invention discloses an organic / inorganic compound fertilizer taking biomass charcoal as a matrix, a preparation method of the organic / inorganic compound fertilizer and a preparation method of fine straw biomass charcoal powder, relates to a compound fertilizer, a preparation method thereof and a preparation method of biomass charcoal and aims to solve the problems that the compound fertilizer is high in raw material cost, poor in granulation, capable of causing straw resource waste and low in utilization ratio and the energy consumption in the production process of the fine straw biomass charcoal powder is high. The fertilizer disclosed by the invention is prepared from fine straw biomass charcoal powder, a nitrogen fertilizer, a phosphate fertilizer, a potassium fertilizer, bentonite, a binder and trace elements; the preparation method of the fertilizer disclosed by the invention comprises the steps: firstly, preparing biomass charcoal; and secondly, smashing and screening; and the preparation method of the fertilizer disclosed by the invention comprises the steps: firstly, weighting the fine straw biomass charcoal powder and other raw materials; secondly, pretreating an inorganic fertilizer raw material; thirdly, mixing; and fourthly, granulating and drying to obtain organic / inorganic compound fertilizer grains taking the biomass charcoal as the matrix. The preparation method of the organic / inorganic compound fertilizer is applied to the technical field of fertilizer production.
Owner:黑龙江省农业科学院农村能源研究所

Method and apparatus for desulfurizing exhaust gas of seagoing vessel

The invention relates to a method and a device for desulfurizing exhaust smoke of a sea-going ship, which uses sea water to reduce discharge of sulfur dioxide and other pollutants of the sea-going ship. The method comprises the following steps of: sea water scrubbing, acidic sea water transferring, acid separating treatment, water discharge and so on. The device comprises a scrubber and a water-saving acid separator, wherein, the upper part of the scrubber is provided with a scrubbing layer, and is communicated with a scrubbing sea water pump through a pipeline; the lower part of the scrubber is provided with a cooling layer; one end of the scrubber is communicated with a smoke exhaust pipe of a ship engine through a scrubbing inlet pipe, while the other end of the scrubber is connected with a scrubbing exhaust pipe; the lower part of the scrubber is communicated with the water-saving acid separator; and the water-saving acid separator is connected with a mixed sea water pump, a draught fan and a main discharge pipe for suitably discharging sea water which is subject to the acid separating treatment. The method and the device have the advantages of high desulfurizing efficiency, small sea water consumption, low equipment manufacturing cost and low running cost.
Owner:WUHAN SAFE ENVIRONMENTAL PROJECT TECH INC

Superconducting nanowire single photon detector based on deep silicon etching process and preparation method

The invention provides a superconducting nanowire single photon detector based on a deep silicon etching process and a preparation method. The detector comprises an SOI base which is composed of a back substrate, a buried oxygen layer and top silicon in sequence from bottom to top, a first anti-reflection layer which is disposed on the surface of the top silicon, a second anti-reflection layer which is disposed on the surface of the back substrate, a deep groove which penetrates through the second anti-reflection layer, the back substrate and the buried oxygen layer, an optical cavity structure which is disposed on the surface of the first anti-reflection layer, superconducting nanowires which are disposed between the first anti-reflection layer and the optical cavity structure, and a mirror which is disposed on the surface of the optical cavity structure. By etching the deep groove on the substrate, the distance between a coupling optical fiber and the device is narrowed, the use of a long-focus lens in the traditional back-coupling superconducting nanowire single photon detector is avoided, and alignment coupling between the MU head of an optical fiber and the device is facilitated. The problem concerning long-distance focusing in the optical cavity structure and the influence of the Fabry-Perot cavity of the susbtrate on the absorption efficiency are avoided. The absorption efficiency of target wavelength is improved. The detection efficiency of the device is improved.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI

Photovoltaic energy storage electric automobile charging station system and method for switching state of energy storage system

The invention discloses a photovoltaic energy storage electric automobile charging station system and a method for switching working state of an energy storage system. The photovoltaic energy storage electric automobile charging station system comprises a photovoltaic system, an energy storage system, a charging system, a DC(direct current)/AC (alternating current) inverter, an AC/DC rectifier and a DC/DC converter, wherein the photovoltaic system is connected to an alternating current power distribution network by virtue of the DC/AC inverter and is connected to the energy storage system by virtue of the DC/DC converter; the energy storage system is connected to the alternating current power distribution network by virtue of the DC/AC inverter and is connected to the charging system by virtue of the DC/DC converter; and the charging system is connected to the alternating current power distribution network by virtue of the AC/DC rectifier. The method provided by the invention has the advantages that uniform scheduling on the photovoltaic system and the energy storage system in the electric automobile charging station is realized, utilization rate of the charging station to solar energy in an area is improved, and impact to a power grid by centralized charging can be effectively buffered, thus power supply stability is guaranteed, grid discharging can be realized, peak shaving of the power grid can be participated, power quality is improved, and obvious economic benefit is achieved.
Owner:SHENZHEN POWER SUPPLY BUREAU +1

Oil gas recovery method and device using absorption method and membrane separating method integration technology

The invention relates to an oil gas recovery method and a device, which uses the integration technology of the absorption method and the membrane separation method; the method leads the mixed gas with various oil gas and air produced in the oil receiving and dispatching process of the oil product storage and transportation device to enter an absorption tower through a gas gathering tube and a compressor; dedicated lean absorbent is used in the absorption tower to absorb the oil gas discharged from the evaporation of the recovery of the light oil product, the off-gas that comprises a small amount of oil gas inside the tower is sent to a membrane separator, the oil gas and the air can be further separated, the air is sent to the free air, and the absorbent inside the tower that absorbs the oil gas is sent to a desorption tank to be desorbed and regenerates, thus ensuring the absorbent to be recycled. The oil gas with high concentration separated from the membrane separator and desorbed from the desorption lateral tank can be sent to the recovery tower and be absorbed by the liquid lean oil body inside the tower, and the fat oil after absorption is sent back to the oil storage tank or is used directly. The oil gas recovery rate of the invention is up to 99 percent, and distinct environmental benefit and economic benefit can be obtained.
Owner:江苏惠宇电仪设备有限公司

Additive for smelting aluminium alloy and preparation method and application method thereof

The invention relates to an additive for smelting aluminium alloy and a preparation method and an application method thereof, relating to the technical field of nonferrous alloy manufacturing with a special additive. The additive is composed of metal powder, cosolvent, heat-generating agent, detonating agent and moisture proof agent. The preparation method comprises the following steps: raw materials comprising the following by mass percentage, 70-81.5% of metal powder, 15-20% of cosolvent, 2-5% of heat-generating agent, 1-3% of detonating agent and 0.5-2% of moisture proof agent, are fully mixed evenly into compound powder with a ball mill, and the mixture is put into a mould, and is performed with cold pressing by a hydraulic pressure machine so as to obtain the additive for smelting aluminium alloy. The application method of the invention comprises the following steps: a graphite crucible filled with a pure aluminium pig is arranged in a resistance furnace to be heated until the aluminium pig is melted into aluminium liquid, and then the additive is added to react with the aluminium liquid so as to obtain aluminium alloy. Under the condition that the quality of aluminium alloy is not lowered, the additive solves the problems of high dissolving temperature, low absorptivity and unstable absorptivity of the additive.
Owner:HEBEI UNIV OF TECH
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