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719 results about "Cold trap" patented technology
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In vacuum applications, a cold trap is a device that condenses all vapors except the permanent gases into a liquid or solid. The most common objective is to prevent vapors being evacuated from an experiment from entering a vacuum pump where they would condense and contaminate it. Particularly large cold traps are necessary when removing large amounts of liquid as in freeze drying.
Natural tea essence prepared by using tea and preparation method thereof
ActiveCN101928639AFavorable for free precipitationEasily damagedEssential-oils/perfumesPectinaseWater vapor
The invention relates to a natural tea essence prepared by using tea and a preparation method thereof. The tea is taken as a raw material; high-purity natural tea essences with different tea aroma characteristics are prepared through compound enzymolysis, releasing, steam distillation under reduced pressure, cold trap recycling, low temperature freezing concentration, centrifugal oil-water separation, and trace moisture adsorption by using anhydrous sodium sulfate; and the compound enzymolysis and the releasing are realized by adding pectinase, cellulase or pectinase and cellulose complex enzyme, and beta-glucosidase. In the preparation method, a pectinase and cellulose complex enzyme method is adopted for enzymolysis to facilitate cracking cell walls of the tea so as to facilitate liberation and separation of aroma components from the tea, and improve the yield of the essence; therefore, the method is a method for industrially producing the natural tea essence which is energy-saving, low in cost, environmentally friendly and high in efficiency.
Owner:ZUNYI LUSHENG HEALTH SOURCE & TECH DEV
Exposure apparatus, and device manufacturing method using the same
InactiveUS20050110966A1Avoid radiationSemiconductor/solid-state device manufacturingPhotomechanical exposure apparatusOptoelectronicsRadiation shield
Disclosed is an exposure apparatus having a specific structure that includes a cold trap plate for attracting contaminant substances which might cause a decrease of reflectance of a mirror when adhered thereto, and a radiation shield member for preventing excessive cooling of the mirror or the like by the cold trap plate.
Owner:CANON KK
Liquid sodium metal thermohydraulic experimental loop system and using method thereof
InactiveCN102254577ARealize the experimental study of hydraulic characteristics analysisNuclear energy generationNuclear monitoringLiquid stateLiquid metal
The invention discloses a liquid sodium metal thermohydraulic experimental loop system. The loop system comprises a sodium filling system, a loop body, a vacuum system, an argon system and a glove box, wherein the sodium filling system comprises a sodium fusion tank and a sodium filter; the loop body mainly comprises a sodium storage tank, a pump box, a main electromagnetic pump, an auxiliary electromagnetic pump, a preheater, a test section, a radiator, a calibration barrel and a cold trap; and the glove box mainly comprises a sodium sampling analysis device. By the system, sodium filling operation can be realized, liquid sodium metal heat transfer flow characteristics are analyzed, liquid sodium metal is purified on line, an electromagnetic flowmeter is calibrated, and multiple functions of sampling analysis, detection and the like of the liquid sodium metal are realized.
Owner:XI AN JIAOTONG UNIV
Application of transition metal carbide to biomass oil hydrodeoxygenation
ActiveCN102604668ALow costHigh activityPhysical/chemical process catalystsTreatment with hydrotreatment processesSystem pressureReaction temperature
The invention relates to application of transition metal carbide to biomass oil hydrodeoxygenation, which belongs to the technical field of transition metal carbide catalyst and aims to solve the technical problem about providing application and a preparation method of transition metal carbide catalyst which is high in activity and fine in stability. The preparation method includes: filling transition metal carbide catalyst into a reactor tube, reducing the transition metal carbide catalyst online under the atmosphere of H2, adjusting system pressure to be 1-10MPa when the temperature of the reactor tube is lowered to reaction temperature after reduction, introducing biomass oil into the reactor tube by a high-pressure liquid-phase pump, controlling liquid hourly space velocity (LHSV) to be 1-4h-1, hydrogen oil ratio to be 800-1600 and reaction temperature to be 200-500 DEG C, and collecting products cooled by a cold trap by a liquid collector. The transition metal carbide prepared is low in cost, high in activity, fine in stability, and suitable for industrialized production.
Owner:山西中科化美科技有限责任公司
Flue gas hydrargyrum-removing method by catalytic oxidation
InactiveCN1698931ALittle matrix damageReduce pollutionDispersed particle separationPtru catalystSorbent
This invention relates to a catalytic oxidation smoke gas mercury removing method, which is used for controlling and reclaiming the gas mercury, especially for the brown coal and subbituminous coal smoke gas. The method uses the mercury oxidative catalyst and the adsorbent to oxygenize and absorb mercury in the smoke gas, then dissociate and elution the mercuric oxide in high temperature to regenerate it. The heat of the elution gas can be reclaimed by residual heat utilization device, and the high concentration mercury will be reclaimed through cold-trap or processed by the agent in the mercury reactor. The reclaimed mercury and other by-product can be sold to reduce the cost. Said invention uses the thermal instability of the mercuric oxide, and reclaims in the relative lower temperature; the recovery ratio can reach to 98%, meanwhile, it processes post-treatment with the mercury and has no secondary pollution.
Owner:SHANGHAI JIAO TONG UNIV
Method for preparing electronic cigarette nicotine liquid by means of tobacco subjected to dry distillation pyrolysis
The invention relates to electronic cigarettes, in particular to a method for applying tobacco subjected to dry distillation pyrolysis to a novel tobacco product to obtain an extract with sensual pleasures and psychological intensity similar to those of traditional cigarettes. The method for preparing electronic cigarette nicotine liquid by means of tobacco subjected to dry distillation pyrolysis comprises the steps of weighing tobacco, placing tobacco in a heating furnace, increasing temperature to 150-1000 DEG C, introducing carrier gas, introducing smoke generated from pyrolysis into an absorption bottle, placing the absorption bottle in a cold trap, conducting smoke collection with an electronic cigarette solvent, washing smoke condensation products in a pipeline out by means of collection liquid, and obtaining smoke extraction solution. The electronic cigarette nicotine liquid has the advantage that sensual pleasures and psychological intensity similar to those of traditional cigarettes are obtained.
Owner:CHINA TOBACCO ZHEJIANG IND
Liquid metal sodium boiling two-phase thermal-hydraulic test loop system and test method thereof
InactiveCN102915777AMeet the requirement of boiling two-phase testGuaranteed tightnessNuclear energy generationNuclear monitoringData acquisitionLiquid metal
The invention discloses a liquid metal sodium boiling two-phase thermal-hydraulic test loop system and a test method thereof. The loop system is divided into three parts comprising a high temperature part, a low temperature part and an argon branch, wherein the low temperature part comprises a sodium storage tank, an electromagnetic pump, an electromagnetic flowmeter, a purification cold trap, four sodium valves and corresponding connecting pipelines; the low temperature part is made of 316L stainless steel; the high temperature part comprises a regeneration heater, a preheater, a test section, an upper expansion box and corresponding connecting pipelines; the high temperature part is made of Incoloy 800 and allows the operating temperature to reach 1,200 DEG C; and the argon branch comprises an argon bottle, an expansion pressure stabilizing box, a vacuum pump, three pressure gauges, ten vacuum diaphragm valves and corresponding connecting pipelines. The system is suitable for operating at high temperature, has a good sealing property and can realize analysis and research on the liquid metal sodium boiling two-phase heat exchange flow characteristic by adding different test sections and a data acquisition system.
Owner:XI AN JIAOTONG UNIV
Method for capturing main components in smoke releasing substances of electronic cigarette
InactiveCN103940639AImprove capture efficiencyCapture completelyComponent separationWithdrawing sample devicesGlycerolBiology
The invention relates to a method for capturing main components, such as nicotine, glycerinum, propylene glycol, aldehydes and volatile organic compounds, in smoke releasing substances of an electronic cigarette. The method comprises the following steps of smoking an electronic cigarette sample by adopting a linear smoking machine according to an ISO smoking mode, and capturing particle phase parts in the smoke releasing substances through a 44mm cambridge filter. A cold trap capturer is connected between a capturer and a smoking needle barrel of the smoking machine and is used for capturing a gas phase component penetrating through the cambridge filter; the particle phase part captured by the cambridge filter is subjected to ultrasonic extraction, and the amount of target analytes in capturing liquid and the amount of target analytes in extracting liquid are respectively measured; the total amount of the main target analytes in the smoke releasing substances in the electronic cigarette is calculated. According to the capturing of the main components in the smoke releasing substances of the electronic cigarette, the capturing is comprehensive, the capturing efficiency is high, and the accuracy and the scientificity of main component detection for the smoke releasing substances of the electronic cigarette are improved.
Owner:CHINA TOBACCO YUNNAN IND
Method and device for high-efficiency recovery of waste circuit boards in vacuum
InactiveCN101444784ANo secondary pollutionSuitable for recyclingSolid waste disposalElectronic waste recyclingEngineeringPrinted circuit board
The invention discloses a method and a device for high-efficiency recovery of waste circuit boards in vacuum. The method comprises the following steps: the waste circuit board is arranged in a vacuum vessel and heated for pyrolysis, wherein, most of pyrolysis volatile matter is cooled and liquefied into liquid oil, and the rest is taken into a gas collector; a centrifuge device separates soldering tin from the circuit board during the pyrolysis; substrates and electronic components of the pyrolyzed circuit board are assorted and collected to be further separated and recovered. The device comprises a compound vacuum pyrolysis and centrifuge device, a cold trap, the gas collector and a vacuum pump. The vacuum vessel of the compound vacuum pyrolysis and centrifuge device is sequentially connected with the cold trap, the vacuum pump and the gas collector by pipelines. The device has the advantages of simple process, no pollution, low cost, high efficiency, and high recovery ratio of waste resources of the waste circuit boards. The soldering tin and organic substances of the waste circuit boards are synchronously recovered, and the soldering tin is separated from other metals at a high efficiency, thus creating a good condition for high-efficiency recovery of other metals. The method and the device are suitable for industrialized application and can help achieve large-scale recovery of the waste circuit boards.
Owner:CENT SOUTH UNIV
Equipment for preparing pill using cold wind and trap cooling gas
ActiveCN101229099ALow costTo achieve the purpose of refrigerationLighting and heating apparatusStationary refrigeration devicesCold airOrganic solvent
Owner:TIANJIN TASLY PHARMA CO LTD
Sampling analysis device and sampling analysis method for atmosphere volatile organic compounds
ActiveCN103499662AMeet the needs of online monitoringFast coolingComponent separationEngineeringAnalysis method
The invention discloses a sampling analysis device for atmosphere volatile organic compounds. The sampling analysis device comprises a low-temperature environmental box and an atmosphere sampler, wherein low-temperature cold trap devices are arranged in the low-temperature environmental box and comprise a first cold trap, a second cold trap and a third cold trap, the first cold trap comprises a first condensation pipe and a first semiconductor chilling plate set, and a first heating wire is wound on the first condensation pipe; the second cold trap comprises a second condensation pipe and a second semiconductor chilling plate set, and a second heating wire is wound on the second condensation pipe; the third cold trap comprises a third condensation pipe and a third semiconductor chilling plate set. The invention further discloses a sampling analysis method for the atmosphere volatile organic compounds. The sampling analysis device and the sampling analysis method can meet requirements on the online monitoring of the contents of the volatile organic compounds and can be used for automatically detecting the contents of the atmosphere volatile organic compounds in an on-site and online manner.
Owner:苏州威阳环保科技有限公司
Device for purifying and enriching inert gases and use method
ActiveCN102012333ARealize quantitative injectionRealize analysisPreparing sample for investigationMaterial analysis by electric/magnetic meansSample purificationEngineering
The invention relates to a device for purifying and enriching inert gases and a use method. On the basis of an inert gas isotopic analysis technique, a Zr-based getter material capable of working at a room temperature is used in the invention, and meanwhile, a sample quantitative control system and a 15K low temperature cold trap are additionally arranged. All function parts are reasonably arranged and matched in the device so as to make a system have dynamic high vacuum (5.0*10-8Pa) and low leakage rate. A trace of inert gases in a single gas sample can be purified and enriched in 10 minutes. The quantitative analysis of the contents of inert gases He, Ne, Ar, Kr and Xe in the gas sample is conducted by a four-pole mass spectrometer. Meanwhile, one-step sample purification is realized, all components of the inert gases are chilled and enriched by the low temperature activated carbon cold trap (15K), and the inert gases He, Ne, Ar, Kr and Xe are gradually released in a gradual heating way. The invention lays a foundation for conducting isotopic analysis on all components of the inert gases.
Owner:CHINA PETROLEUM & CHEM CORP +1
Method for preparing hexachlorobutadiene
InactiveCN101525267ASimple processLow equipment requirementsHalogenated hydrocarbon preparationZinc bromideHexachlorobutadiene
The invention provides a method for preparing hexachlorobutadiene by using 1, 1- dibromo-tetrafluoroethane, comprising: zinc powder and aprotic polar solvent are added into a reactor I protected by inert gas to lead the temperature to reach 50-90 DEG C; the 1, 1- dibromo-tetrafluoroethane is added into the reactor I within 0.5-3.5h and then reacts for 1.5-5h at the temperature of 50-120 DEG C; after that, the zinc powder reacts with the 1, 1- dibromo-tetrafluoroethane to produce trifluoro-ethylene zinc bromide; the reactor I is cooled to be room temperature, and the solution in the reactor I is added into a reactor II containing catalyst and solvent at the temperature below 1-40 DEG C within 0.5-3h and then reacts for 1-7h at the temperature of 0-60 DEG C; after the reaction, the obtained product is collected by a liquid nitrogen cold trap. The invention has the advantages of short synthetic route, simple technique, high raw material conversion rate, high yield of product and high purity of crude product, so that the product is simple to separate and purify, and the environmental pollution is reduced.
Owner:HENAN UNIVERSITY OF TECHNOLOGY
Pretreatment method and device for measuring 14C abundance of organic compound type sample
InactiveCN103822811AGuaranteed test accuracyReduce processing costsPreparing sample for investigationChemical treatmentCombustion chamber
The invention relates to a pretreatment method for measuring 14C abundance of an organic compound type sample. The method includes transferring carbon atoms in the organic compound into CO2 molecules through combustion, reacting CO2 with a NaOH solution to obtain a saturate NaHCO3 solution, heating the saturate NaHCO3 solution to obtain a saturate Na2CO3 solution, and adopting the saturate Na2CO3 solution for 14C abundance tests. The invention also provides a device used for the method. The device mainly comprises an oxygen cylinder, a nitrogen cylinder, a cold trap A, a three-way stopcock A, a combustion chamber, a cold trap B, a stone, a cold trap C, a three-way stopcock B, a conical flask, a cold trap D, a three-way stopcock C, a U-shaped gas sample collector, a three-way stopcock D, a vacuum gauge, a vacuometer, a piston D and a vacuum pump. On the basis of guaranteeing the measuring accuracy, the method largely simplifies the chemical treatment process, increases the time efficiency and reduced the cost.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Vacuum low temperature microscopic visualizer
InactiveCN101231249AAccurate observationComprehensive observationMaterial analysis by optical meansMaterial thermal analysisEngineeringData treatment
The invention relates to a vacuum low temperature micro visualize, which comprises a sight chamber, a cold trap, a refrigeration system, a vacuum system, and a control and teat recording system. A microscope, an electronic scale, a cooling and heating element, a winding lens shielding mechanism, a temperature sensing element, and a pressure sensing element are arranged in the sight chamber. A low temperature condensing coil is arranged in a cold trap chamber, the refrigeration system is connected with a heating refrigeration board and a nozzle of the sight chamber as well as the condensing coil of the cold tap chamber. A vacuum pump is connected with a pumping hole of the cold trap chamber, the computer control and teat recording system is connected with a thermocouple, the electronic scale, and the sight chamber, and is connected with an image collector above the microscope through an image data processor. The invention can be used for studying the heat-transfer and mass-transport process of various solids and liquid materials under the condition of low temperature and vacuum, and for timely and continuously observing the mass, the temperature, the pressure, and the micro image of the observed materials, which are recorded and stored by a computer, thereby realizing the numeralization operation.
Owner:NORTHEASTERN UNIV
Method for plating parylene film on surface of LED chip
InactiveCN101603170AStrong adhesionUniform thicknessVacuum evaporation coatingSputtering coatingParyleneEngineering
The invention discloses a method for plating a parylene film on a surface of a LED chip. The method is characterized by comprising the following steps that a plating part LED chip is placed into a settling chamber; a film plating material parylene is placed into an evaporation chamber; the film plating material enters the settling chamber as activated monomers after vaporizing and cracking; a uniform and transparent parylene film is settled on the surface of the LED chip, wherein, the film plating device comprises a vaporization chamber, a cracking chamber, the settling chamber and a cold trap chamber. The method has simple process, convenient operation, strong film adhesive force and uniform film thickness, greatly improves the reliability, safety and service life of the product, solves the problems of water resistance, humidity resistance, high temperature resistance and acid-base corrosion of LED lighting products, and contributes to further popularization and application of LED brightening and electricity saving engineering.
Owner:黄益新
Apparatus and method for the production of trisilylamine
There is described an apparatus, a tubular laminar flow, plug flow reactor, for making silylamines and particularly trisilylamine (TSA) in high yields from ammonia gas and a monohalosilane gas. The apparatus can be a tubular flow reactor comprising a first portion of the reactor defining a gas entry zone, a second portion of the reactor defining a reaction zone and a third portion of the reactor defining a separation zone, the reaction zone providing a reactant contacting region. Trisilylamine can be recovered in the separation zone in a cold trap collection vessel.
Owner:LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
Online automatic measuring system for environment air quality based on low-temperature condensing method sampling
InactiveCN102410986AHigh cost performanceEliminate measurement effectsWithdrawing sample devicesPreparing sample for investigationComputer analysisSulfur dioxide
The invention belongs to the measurement technical field of atmosphere environment quality, which specifically relates to an online automatic measuring system for environment air quality based on low-temperature condensing method sampling. The system is composed of a low-temperature condensing sampling system and an analyzing system; the low-temperature condensing sampling system comprises a drying pipe, an electronic cold trap and a low-temperature low trap that are connected in turn; the drying pipe is connected with an air inlet pipeline for removing vapor and condensing the environment air sample at low temperature; the analyzing system comprises a light source, a sampling battery, an optical spectrum instrument and a computer; the analyzing system splits and detects the air condensed by the sampling system through the optical spectrum instrument by the ultraviolet function from the light source and then analyzes the air by the computer. The system is high in integrated degree and measuring efficiency, which is suitable for continuous, real-time and online measurement of various pollutants of atmosphere environment (including sulfur dioxide, nitrogen dioxide, ozone, ammonia, formaldehyde and part of benzene series) in environment air.
Owner:FUDAN UNIV
Technological method and equipment for preparing nitrogen trifluoride gas
InactiveCN1450202AHigh purityReduce the difficulty of purificationElectrolysis componentsCooling towerBoiling point
The present invention relates to a process for preparing NF3 gas and its equipment. It is characterized by that the anodic electrolytic gas in the electrolytic cell is fed into a pressure balancing tank by means of pipe, then fed into a low pressure tank via regulating valve, and said gas is fed into a low-temp. cooling tower by means of pipe to remove high-boiling point impurities of NH4F and HFfrom said anodic electrolytic gas to obtain NF3 gas, then the NF3 gas is fed into an ultralow temp. cold trap to make liquification and collection, and remove low-boiling point impurities or N2 and O2 from it by adopting the measure of evacuating cold trap, after the NF3 gas is collected and liquified in the ultralow-temp. cold trap, heating the cold trap and distilling said NF3 gas and pressing it into crude NF3 gas storage tank, the material of anode in the electrolytic cell is high-purity nickel.
Owner:PERIC SPECIAL GASES CO LTD
Catalyst surface-characteristic comprehensive measuring device and application thereof
The instrument comprises carrier gas inlet, working gas inlet, other gas inlet, gas flow meter, mixer, the first and the second four-way valve, the first and the second six-way valve, saturator, heating furnace with programmed control temperature, sample tube with internal-inserted thermocouple, heat conductive pool, cold-trap, chromatographic column, hydrogen flame detector sampling and displaying of computer and spectrogram printing. The instrument with above devices can apply techniques of programmed temperature for reduction de-addendum, surface reaction, oxidation and decomposition as well as H2-O2 titration to carry on surface performance test for catalyst and to obtain spectrogram for each abovesaid performance of the catalyst.
Owner:SHANGHAI NORMAL UNIVERSITY
Quantitative detecting method of trace amount phosphine gas and enriching apparatus thereof
InactiveCN101281178AAccurate measurementRealize online temperature controlComponent separationNitrogen–phosphorus detectorPeak area
The invention discloses a quantitative detecting method and a gathering device for measuring phosphine gas. The gathering device comprises a sampler, the sampler is connected with a cold trap column through a six-way valve, a first cold trap column is connected with a second cold trap column, the cold trap column is communicated with a chromatographic column. The detecting method is that the gas which is released after the sorption state phosphine is cleared up in a fixed method, then sampling according to a fixed operation, the sampling gas which is eliminated the acid gases and vapor through a NaOH absorption tube is entered into the gas chromatograph after gathering and removing impurities through the switching of the six-way valve in the two front column cold trap, reading the response signal of the nitrogen-phosphorus detector to integral, at last work out the concentration of the phosphine in the practical sample through comparing the area of the peak area of the sample and the phosphine standard gas chromatography. The invention has high sensitivity and low detecting limit, the time of appearing peak in gas chromatography is short, and the peak shape is distinctness, which is easy to determine the nature and the quantity and makes the detection rapid and simple.
Owner:NANJING UNIV
Clean vacuum system used for engine plume test research and vacuumizing and repressing method thereof
InactiveCN102359859AVarious working modesThe pumping speed is adjustableAerodynamic testingEngine testingGas analysisNitrogen
The invention provides a clean vacuum system used for engine plume test research and a vacuuminzing and repressing method thereof, belonging to the technical field of engine vacuum science. The clean vacuum system comprises a low vacuum system, a low vacuum liquid nitrogen cold trap system, a high vacuum system, a high vacuum liquid nitrogen cold trap system, a low temperature pump liquid nitrogen supply system A, a low temperature pump liquid nitrogen supply system B, an air repressing system, a nitrogen repressing system, a container vacuum measuring system, a residual gas analysis system, a liquid nitrogen heat sink, and a liquid nitrogen heat sink and plume adsorption pump. In the clean vacuum system, the vacuum is obtained mainly relying on the clean low vacuum system, the high vacuum system and the liquid nitrogen heat sink, the liquid nitrogen heat sink and plume adsorption pump; various clean vacuum degrees required by the plume test can be obtained, and the highest ultrahigh dynamic vacuum degree of 10<-6> Pa can be obtained. Both the low vacuum system and the high vacuum system are configured with the liquid nitrogen cold trap system which is used for absorbing the oil steam produced by working of a mechanical pump, so that the cleanness of the vacuum container can be ensured.
Owner:BEIHANG UNIV
Smoking machine-mainstream flue gas cold trap integrated device and using method thereof
ActiveCN101566535AConditions are easy to controlFully condensedSolidificationLiquefactionEngineeringIntegrated devices
The invention discloses a smoking machine-mainstream flue gas cold trap integrated device and a using method thereof. The integrated device comprises a smoke holder, a cold trap device, a cambridge filter and a single-passage smoking machine that are sequentially connected by pipelines; the cold trap device comprises a mainstream flue gas trap pipe and is internally provided with a refrigerant; the mainstream flue gas trap pipe is dipped in the refrigerant; and the mainstream flue gas trap pipe is a quartz pipe of a spiral shape. After the sucking of a cigarette is completed, an organic solvent is added in the mainstream flue gas trap pipe and the mainstream flue gas trap pipe is vibrated sufficiently; the mainstream flue gas condensate is extracted repeatedly; subsequently, the extract is combined; and then the mainstream flue gas sample is analyzed. The method has higher and safer trap efficiency on the aroma-active components in the mainstream flue gas, effectively avoids the generation of various side effects during the flue gas sample treatment process, simplifies the treatment process, shortens time and has higher repeatability. The method has important application prospect in the fields of analyzing cigarette quality and researching flue gas fingerprints.
Owner:CHINA TOBACCO HUNAN INDAL CORP
Enrichment analysis instrument of carbon and nitrogen of greenhouse gases of CO2 and N2O
InactiveCN103424462AEnrichment is complete and fastIncreased Gas Test SensitivityPreparing sample for investigationMaterial analysis by electric/magnetic meansAssayWater trap
The invention discloses an enrichment analysis instrument of carbon and nitrogen of the greenhouse gases of CO2 and N2O. A greenhouse gas sample collected by a sampling tube is led through a sample guiding valve under the He gas, is dehydrated by an electron cold trap, undergoes enrichment and transferring in a liquid nitrogen cold trap, undergoes separation by a chromatographic column and dehydrating by a water trap and is led into a gas isotope mass spectrometer through an opened shunting port for being detected. The enrichment analysis instrument has the port which is directly connected with an isotope mass spectrometer mainframe, is an independent accessory device of the isotope mass spectrometer and carries out assay determination on isotope abundance of the carbon and the nitrogen of the greenhouse gases of CO2 and the N2O which are greenhouse gases at the same time. The gas is transferred from a cold trap T1 to a cold trap T2 through conversion of gas-carrying flow and by changing a freezing state of the target gas in the traps. Meanwhile, other impurity gases which are captured by a freezing gas are released and thus, good chromatographic peak shapes and higher purity of the sample are achieved and the testing precision is improved.
Owner:COLD & ARID REGIONS ENVIRONMENTAL & ENG RES INST CHINESE
Chromatograph on-line analysis method for source rock by closed ball milling, heating analysis and cold trap trapping
The invention discloses a chromatograph on-line analysis method for source rock by closed ball milling, heating analysis and cold trap trapping, which is used for analyzing light fraction compound and percentage composition thereof in the dispersed organic matter of the source rock, and is characterized by comprising the following steps: carrying out vacuum sealing and ball milling on a source rock sample, carrying out ball milling, crushing, then heating to 300DEG C, and carrying out thermal desorption; blowing the pyrolysed hydrocarbon to a liquid helium cold trap by utilizing helium; placing the cold trap into a chromatograph furnace; and trapping, then carrying out chromatograph or Chromatographic-MS on-line analysis to obtain the qualitative data of chromatograph fine separation and / or Chromatographic-MS analysis of the light fraction in the source rock. The separation degree of the sample can approximate to the separation effect of the light dydrocarbon chromatograph separation of crude oil; the invention has good repeatability, reduces the volatilization loss of the light fraction in the crushing process because of the large volume of the sample before being put in a ball milling tank; and the qualitative analysis result can be used for researching the maturity and the environment of sedimentation of the source rock and carrying out oil source comparison.
Owner:PETROCHINA CO LTD
System and method for measuring content of 57 volatile organic compounds in ambient air
ActiveCN110187037AEfficient enrichmentHigh analytical sensitivityComponent separationInjection volumeFour-way valve
The invention provides a system and a method for measuring the content of 57 volatile organic compounds in ambient air. The system comprises a four-way valve, a gas chromatograph and a three-stage cold trap preconcentrator; the four ports of the four-way valve are respectively connected with a pre-separation column, a first secondary separation column, a second secondary separation column and a helium gas source; and the gas chromatograph is provided with a flame ionization detector and a mass spectrometry detector. The method comprises the following steps: (1) preparing a mixed standard use gas; (2) preparing an internal standard use gas; (3) collecting an ambient air sample; (4) establishing a standard curve of a target component; and (5) taking the ambient air sample to be tested, removing interfering substances through the three-stage cold trap preconcentrator, performing gas chromatography-mass spectrometry analysis in the mass spectrometry detector after focusing is performed, obtaining the content of each component according to a peak area and the standard curve established in the step (4), and calculating the concentration of the sample to be tested according to a sample injection volume of the sample to be tested. By adopting the method provided by the invention, the simultaneous analysis of two detectors is achieved by once sample injection, thereby avoiding the influence of the interfering substances on the measurement result simply and effectively.
Owner:SHANDONG UNIV
Full-automatic intelligent vacuum freeze dryer
ActiveCN101614469ARealize automatic operationGuaranteed speedDrying solid materials without heatCleaning using liquidsAutomatic controlFreeze-drying
The invention relates to a full-automatic intelligent vacuum freeze dryer, comprising a compressor, an oil cooler, a pneumatically or electrically operated valve, a vacuum pump as well as a pump head valve which prevents oil pollution, a filter, a freeze-drying box, a condenser, a butterfly valve or a mushroom valve with position feedback connected by the freeze-drying box and a cold trap, a temperature probe of products in the freeze-drying box and sterilization coldest point, a shelf assembly heat and cold and heating medium indirect heat exchange system, a relay for judging the temperature and pressure of the heat exchange system and a hydraulic station with the pressure relay; the invention is characterized in that an automatic control intelligent element is selected to automatically judge the condition whether to continue running, judgement is carried out, an alarm is given by running continuously or through a sound control alarm device and process routing and data are recorded, power-off protection and memory functions are provided, the vacuum freeze drying device can continue running according to the forepart process after power is re-supplied. The invention has the advantages of ensuring the rapidity and efficiency of the cold trap coil defrosting; saving the manufacturing cost of the box body and the usage of water with the same cleaning effect; freely setting the steam sterilizing F0 value according to actual condition; and achieving the aim of fast cooling.
Owner:SHANGHAI TOFFLON SCI & TECH CO LTD
Infrared gas detection systems and methods
Thermopile-based detection and monitoring / control systems are described, in applications such as inferring concentration of a multicomponent gas by sensing a tracer gas therein, utilizing fiber optic cables to provide multiple sensing paths in a cell, utilizing a modulated IR source switched in on / off cycles, verifying chemical reagent identities, and sensing of effluent following discharge from a contamination removal 8 element or cold trap. A thermopile infrared (TPIR) detector of highly compact character is described for such applications, and permits monitoring of species that may be problematic or otherwise deleterious in such environments. In one implementation, light source modulation and signal processing techniques are employed to improve signal to noise ratio and minimize calibration and complexity of the TPIR detector.
Owner:ADVANCED TECH MATERIALS INC
Method and apparatus for isothermal cooling
ActiveUS20200363101A1Keep the pressureMechanical apparatusCompression machines with several condensersEngineeringControl valves
A cooling apparatus includes: a first fluid flowpath including the following elements, in downstream flow sequence: a separator vessel; a subcooler having a first side in fluid communication with the first fluid flowpath and a second side configured to be disposed in thermal communication with a cold sink; a flow control valve; a primary evaporator assembly including at least one primary evaporator configured to be disposed in thermal communication with a primary heat load; and a pressure regulator operable to maintain a refrigerant saturation pressure within the primary evaporator at a predetermined set point.
Owner:ROLLS ROYCE NORTH AMERICAN TECH
Aquaponic system for vegetable and fish production
InactiveUS20110131880A1Guaranteed uptimeEasy to operateGas production bioreactorsAgricultural fishingAquaponicsAgricultural science
The invention relates to an aquaponic facility with closed water circulation, including at least one aquaculture unit and at least one hydroponic unit, characterized in that the aquaculture unit has at least one water outlet which is functionally connected with the hydroponic unit by a one-way valve such that water from the aquaculture unit can be supplied to the hydroponic unit, and the hydroponic unit has at least one cold trap, wherein the at least one cold trap is functionally connected with the aquaculture unit in such a way that the water obtained from the at least one cold trap can be supplied to the aquaculture unit, as well as its use.
Owner:FORSCHUNGSVERBUND BERLIN EV
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