6 results about "Mass separation" patented technology

The present specification relates to the technical field of two-phase flow measurement, and particularly relates to a gas-liquid two-phase flow measurement method and device, computer equipment and a storage medium. The method comprises obtaining a measured volume flow, a measured mass flow and a measured density corresponding to a gas-liquid two-phase flow to be measured by a measurement device; collecting and calculating a first accurate density corresponding to a target liquid, and calculating a second accurate density corresponding to a target gas based on a gas pressure, a gas temperature and the target gas; substituting the measured volume flow, the measured mass flow, the measured density, the first accurate density and the second accurate density into a fitting formula to obtain fitting data; and processing the first accurate density, the second accurate density, the measured volume flow, the fitting data and the measured mass flow by using a mass separation formula to obtain a target gas mass flow and a target liquid mass flow corresponding to the target gas and the target liquid respectively, so that the mass flow of each phase can be determined conveniently and accurately.

A mass spectrometer including: a reaction chamber into which a precursor ion derived from a sample molecule is introduced; a collision gas supply part configured to supply collision gas to the reaction chamber; a radical supply part configured to supply hydrogen radicals, oxygen radicals, nitrogen radicals, or hydroxyl radicals to the reaction chamber; a dissociation operation control part configured to control operations of the collision gas supply part and the radical supply part to generate the product ions by collision-induced dissociation and radical attachment dissociation of the precursor ion inside the reaction chamber, an ion detection part configured to mass-separate and detect ions ejected from the reaction chamber, and a spectrum data generation part configured to generate spectrum data based on a detection result by the ion detection part.

The invention provides a glow discharge mass spectrometry system for high-purity solid material analysis, and in the system, a glow discharge ion source atomizes a solid sample and ionizes the solid sample into charged ions; the gas source assembly provides a gas environment for ionization and collision reaction; the interface extraction structure and the ion transmission structure cooperate to realize air pressure conversion, ion extraction, transmission and focusing; the collision reaction tank eliminates mass spectrum interference; the quadrupole rod mass analyzer is used for carrying out mass separation on the ions; the detector converts the ion signal into an electric signal; and the vacuum pump system provides a required vacuum environment for each component. The method has the advantages of low matrix effect, high analysis speed, high detection sensitivity, controllable instrument cost and high stability, can directly analyze a solid sample, does not need complex pretreatment, effectively eliminates mass spectrum interference, and realizes rapid and accurate detection of trace components in a high-purity solid material.

The utility model relates to the technical field of fuel cells, and discloses a fuel cell bipolar plate and a fuel cell stack, the fuel cell bipolar plate comprises a plate body; a plurality of hydrogen runners are arranged on one side surface of the plate body, and a plurality of oxygen runners are arranged on the other side surface of the plate body; hydrogen main flow holes are formed in the plate body, the hydrogen main flow holes are communicated with the hydrogen flow channels, and hydrogen substances are distributed to the multiple hydrogen flow channels through the hydrogen main flow holes; the oxygen substance is directly communicated with air through a plurality of oxygen flow channels; a cooling cavity is formed in the plate body; a cooling liquid inlet and a cooling liquid outlet are formed in the two opposite corners of the plate body respectively, located at the two ends of the cooling cavity respectively and communicated with the cooling cavity. According to the utility model, the transmission of hydrogen-oxygen reaction gas and the circulating heat dissipation of cooling liquid can be realized at the same time; and a heat flow path and an oxyhydrogen substance flow path can be completely decoupled in a three-dimensional space through heat-mass separation topological setting, so that better heat dissipation and temperature uniformity can be realized.

This invention belongs to the field of lithium-ion battery safety technology and relates to a method for mass decoupling of multiphase ejections during battery thermal runaway. The method obtains the mass of non-condensable reactive gases through a gas analysis measuring tank, obtains the mass of the electrolyte droplets and solid particle mixture ejected during the safety valve opening phase by interrupting heating, and obtains the total mass of electrolyte vapor and non-condensable reactive gases discharged during the thermal runaway phase by continuous heating. Combining this with the total battery mass loss before and after thermal runaway, the method achieves staged mass separation of the multiphase ejections according to mass conservation, and further constructs the hydrodynamic simulation boundary conditions for the discrete phase model. This method can improve the accuracy of mass quantification of multiphase ejections during battery thermal runaway.

A method for producing a positive electrode active material, includes the steps of (1) bringing an electrode mixture containing a positive electrode active material, a binder, and an electrolyte into contact with an electrolyte cleaning solvent to obtain a slurry containing a solid component and a liquid component, and then separating the slurry into the solid component and the liquid component, wherein an amount of P in the liquid component after separation is 0.0020 to 2.0 mass %, an amount of F in the liquid component after separation is 0.01 to 7.0 mass %, and an amount of P remaining in the solid component after separation is 0.7 mass % or less; (2) mixing an activation treatment agent with the separated solid component; and (3) heating a mixture obtained to activate the positive electrode active material contained in the mixture.