131 results about "Phase equilibrium" patented technology

The invention provides a rule engine-based method and a rule engine-based system for monitoring exceptional service of bank. The method mainly comprises the followings steps: defining and describing operational risk factors of bank service flows, products and service units; determining a lost data and risk data collecting frame to analyze important lost data to determine a cause-and-effect relationship between loss events and risk factors; determining a key risk indicator (KPI); measuring a possible loss amount and a risk probability; measuring the effectiveness of the current management and control method, and making a more effective management and control scheme; deciding and implementing an efficiency and phase equilibrium-based management and control system; and effectively monitoring risk early warning indexes, risk reports aiming at senior management and the risk management and control method. Operational risks of commercial banks are comprehensively monitored, and risks are ensured to be controlled. The system is divided according to logical levels and comprises a service data layer, a data acquisition layer, a data storage layer, a risk processing layer, a risk management layer and an information presentation layer.

The method according to the invention allows the formation of oil and the retention phenomenon in the mother rock to be modelled. Organic matter characterization experiments are used to establish the molecular model (MM) of the initial sample (E). The thermal cracking reaction of this molecular model is reproduced by dynamic molecular simulation computations with a reactive force field (RMD) and validated by comparison with experimental data. The reaction mechanism obtained (SR) allows to carry out a kinetic study (C) by variation of the temperature parameter. The phase equilibria (PES) of the reaction medium are determined at any time from dynamic simulation. The successive phase equilibrium assessments at various progress stages of the cracking reaction allow following the physicochemical evolution (PC) of the thermal maturation of the organic sample studied. The free hydrocarbons (liquid and gaseous) that are not retained in the solid residue can be quantified throughout numerical modelling of the sample maturation; representing, in the sedimentary basins, the hydrocarbons that are not retained in the organic matrix of the mother rock (Q). This quantity can be used as an indicator or an input value for the retention threshold in basin models.

The invention provides a method for determining the phase balance condition of gas hydrates, which mainly has the procedures: gas to be measured is caused to generate hydrates in a reaction kettle which is provided with a temperature measurement system, a pressure measurement system and an exhaust system; gas-phase space in the reaction kettle is compressed; system temperature in the reaction kettle is regulated to the temperature of the phase balance condition to be measured to exhaust the gas and lower the pressure, as well as the exhaust system is closed when the pressure in the reaction kettle rises at once because the exhaust is stopped, thus the reaction kettle is caused to become a closed system; the variation of the pressure in the reaction kettle is observed, if the pressure keeps invariant for a long time, three-phase balance is considered to be reached, at this time, the corresponding temperature and the corresponding pressure are a set of phase balance condition for the hydrates. The system temperature can further rise to the next balance temperature to be measured, the pressure variation is continuously recorded until the hydrates in the reaction kettle is completely decomposed, therefore, a series of phase balance condition data of the hydrates can be obtained. Adopting the method, the phase balance condition of the gas hydrates in a free water system or a porous media can be measured, and the measurement accuracy is high.

The invention relates to a visual experimental device for hydrogen gas hydrate characteristic research, which comprises a gas supply system, a water supply system, a high pressure visual reaction kettle, agitating equipment, a temperature control system, a pressure control system and a data acquisition system, wherein the gas supply system is stored with hydrogen gas and provided with vacuum pumping equipment; the water supply system is stored with a water source and can measure the water amount; the high pressure visual reaction kettle is respectively connected with the gas supply system and the water supply system through pipelines and is provided with a cavity body; the agitating equipment is provided with a motor and agitating blades which are arranged in the cavity body; the temperature control system is provided with a jacket; the pressure control system is installed on the pipeline connecting the gas supply system and the high pressure visual reaction kettle and is used for regulating the pressure of hydrogen gas; and the data acquisition system comprises an electronic endoscope, a temperature sensor, a pressure sensor, a gas flowmeter, a data acquisition instrument and a computer. The device has simple structure and low cost, and can be adopted for the phase equilibrium characteristic research of a hydrogen gas hydrate and the dynamic characteristic research of the generation and decomposition processes of the hydrogen gas hydrate.

A technique facilitates the monitoring of thermodynamic properties of reservoir fluids. The technique utilizes a modular sensor assembly designed to evaluate a sample of a hydrocarbon-containing fluid within a cell body. A variety of sensors may be selectively placed into communication with a sample chamber within the cell body to evaluate the sample at potentially high pressures and temperatures. The sensors may comprise a density-viscosity sensor located in-situ to efficiently measure both the density and viscosity of the sample as a function of pressure and temperature. Other sensors, such as an optic sensor, may also be positioned to measure parameters of the sample while the sample is retained in the sample chamber.

The invention relates to a formula of body mud of high-glass-phase stoneware and a preparation process of the body mud. The formula comprises the following chemical components by mass percent: 60.0-67.0% of SiO2, 10.0-14.0% of Al2O3, 8.0-12.0% of MgO, 0.5-2.0% of CaO, 1.0-2.5% of K2O, 0.5-2.0% of Na2O, 3.0-5.0% of BaO and 4-6.5% of loss on ignition. The body mud is prepared according to the formula and the high-glass-phase stoneware is prepared through the processes of body preparing, glazing, firing and the like. By constructing phase equilibrium between polycrystalline phases and material phases in the stoneware body material, the stoneware body material is endowed with the process properties of low firing temperature, short firing time, wide range, low shrinkage, high glass phase and light weight and the economic and technical indexes of energy conservation, consumption reduction and efficiency increase. The body mud has application prospects in the production fields such as top-grade household porcelains, art porcelains, heat insulation porcelains and the like.

This invention relates to alloying and heat treatment craft of tool die steel, it belongs to one kind of DM8B-2 multi-types superfine carbide high carbon alloy tool steel. Using alloy design method which voluntarily developing, do the phase equilibrium thermo dynamics, electronic/atom level binding energy computation,quenching and the tempered hardness computation as well as to synthesis appraisal its toughness and sintensity. Its ingredient characteristic is appropriate C quantity and Cr/ (W+Mo) ratio, reasonable Si, Mn as well as few Ni; Its microstructure characteristic has the superfine carbide, annealing carbide size is between 0.05-0.8mum, when quenching, the undissolved carbide size should not to be smaller than 0.5mum. after quenching to add 200degree C-300degree C, tempering may enable the tempering hardness to achieve 61-64HRC by using carbide precipitation hardening. It has high yield strength and the impact toughness.In the thin edge cutting tool, cutting die and weightily attacking die areas, it has widespread application prospect.

The invention relates to a suspending drop gas hydrate generation research system which comprises a reaction vessel, a gas supply system, a temperature control system, a drop control system and a data acquisition system. The end of the reaction vessel is provided with pressure withstand optical glass having a visualization function and the reaction vessel is sheathed in a cooling jacket which keeps a constant temperature through the temperature control system; a gas inlet on the reaction vessel is communicated with the gas supply system, the suspending orifice of the reaction vessel is communicated with the drop control system and a temperature sensor and a pressure sensor on the reaction vessel are externally connected with the data acquisition system. The research device is pressure resistant and convenient to operate, monitor and observe experimental phenomena, has a visual microscopic function and can carry out the morphological study of hydrates generated by drop, phase equilibrium characteristics study, dynamic characteristics study of hydrates generated by drop under constant temperature or constant pressure condition, etc.

A computer system analyzes data from giant subsurface hydrocarbon reservoirs which are organized into a number of component cells and simulates the conditions in the reservoirs based on determination of thermodynamic phase equilibrium using equation of state (EOS) modeling. The computer system takes the form of a heterogeneous (hybrid) computer environment which includes computer processor units (or CPU's) and graphical processing units (or CPU's). The system takes advantage of computational acceleration capabilities of the graphical processing units while utilizing the computer processing units for execution control, input/output of data and memory. Processing time requirements are reduced by more than an order of magnitude speed improvement over existing methods.

The invention discloses a testing device for natural gas hydrate phase equilibrium in marine sediment and a method thereof and relates to the testing technology for natural gas hydrate in marine sediment. The testing device mainly comprises a high-pressure reaction vessel (10), a hydraulic container (20), a gas-water separator (30), a first and a second piston pump (41, 42), a vacuum pump (50), a liquid quantity meter (60), a gas feeder (70), a thermostatic apparatus (80) and a data acquiring system (90). The invention realizes the simulation of forming and disintegrating process of gas hydrate in marine sediment and the testing of phase equilibrium relation. The device has simple structure, high precision, excellent stability and convenient operation, without high skill demand to test clerk.

The invention relates to a test device, and especially relates to an experimental device for in-situ monitoring of hydrate phase equilibrium. The experimental device is characterized in that the device comprises a housing body; a reaction vessel and a gas storage container are arranged in the housing body and are communicated with each other by a gas feed pipe; the gas storage container is communicated with a gas bomb by a gas feed pipe and a pressure device; the reaction vessel is connected with a computer microprocessor through an optical imaging system, a metering control system and a chromatographic analysis system; and the reaction vessel is arranged in a water-bath jacket. Based on the experimental device, during the whole experiment process, the in-situ real-time recording of temperature data, pressure data, image data and chromatographic analysis data is carried out in one device by a computer system.

A method of estimating a thermophysical property of a fluid using a local model is disclosed herein. The method includes generating, for use within the local model, a series expansion of thermodynamic equations relating to the thermophysical property and one or more derivatives involving the thermophysical property. The method further includes evaluating, based upon a set of specified values of parameters of the fluid, a first order term of the series expansion and a second order term of the series expansion. The values of the first order term and the second order term are then compared. A value of the thermophysical property is then automatically updated when the values of the first order term and the second order term are found to differ by more than a predefined amount.

The invention discloses a flowing high temperature and high pressure phase equilibrium measuring device and an application method of the flowing high temperature and high pressure phase equilibrium measuring device. The flowing high temperature and high pressure phase equilibrium measuring device comprises a feed system, an equilibrium still, a sampling system and an ultraviolet online detecting system; the equilibrium still is made from GH132 nickel base alloy to resist against a high temperature of 773K and a high pressure of 50MPa so as to obtain a stable phase equilibrium state within a large temperature and pressure range; a window is made from sapphire, so that the whole device is visible, the whole measurement process is accurate and reliable, and the phase equilibrium change process is convenient to shoot; the reasonable feed system is used for guaranteeing uniform ingredients and uniform mixing of reagents entering the equilibrium still; the reasonable sampling system is used for preventing the sampling process from affecting the phase equilibrium of the flowing system; and the ultraviolet online detecting system facilitates collection of data and is used for comparing the data with the sample data obtained by the sampling system to guarantee the accuracy and reliability of the data.

The present invention relates to a visualized phase equilibrium experimental device of freezing medium hydrate for coldness accumulation and an application of the same, comprising a water bath, a reaction tank, a camera, a computer, a data collector, characterized in that the reaction tank is composed of a quartz glass tank, a mixing electric motor, a magnetic stirrer, an upper flange end cap, a lower flange end cap, a temperature sensor and a pressure sensor; the application steps are: 1. producing hydrate; 2. measuring the phase equilibrium parameter of the freezing medium hydrant. This invention is exceedingly convenient to observe the formation process of gas hydrate under a defined temperature condition by a static method or a magnetically stirring crystallizing method; the gas hydrate produced in the process is exceedingly compact and of good heat exchanging performance; the invention is a visualized research apparatus that is capable of measuring the phase equilibrium parameter of freezing medium hydrates (comprising polynary ingredient systems and nanometre liquids) with an observation method and constant-volume method.

Belonging to the technical field of chemical engineering and petroleum engineering, the invention relates to a device and a method for determination of an oil gas minimum miscibility pressure through a magnetic resonance imaging technology. The device mainly comprises a magnetic resonance imaging system and a gas injection system. For the magnetic resonance imaging system, a pressure vessel is arranged in a magnetic resonance imaging instrument, a flat bottom test tube is positioned in the high pressure vessel, and the magnetic resonance imaging instrument is electrically connected to a data acquisition and processing system. The method for determining the minimum miscibility pressure of gas and oil firstly makes use of a magnetic resonance imaging technology to determine the signal strength distribution of oil in the flat bottom test tube so as to obtain a signal strength change curve of oil in gas and liquid phases within an imaging visual field under certain temperature along with the variation of pressure. By determining the intersection point of the signal strength curve and a pressure axis, the minimum miscibility pressure of gas and oil can be obtained. The method can determine the minimum miscibility pressure of gas and oil and enhance the understanding on the gas-liquid two-phase equilibrium law of gas and oil, thus being able to provide basic physical property data for underground multiphase multicomponent migration law analysis of light hydrocarbon and CO2 tertiary oil recovery.

The invention relates to a material design method for an elastic copper alloy, and belongs to the field of material research method and technology. The method comprises the following steps: establishing a thermodynamic model of a research system by employing a calphad method to carry out phase equilibrium calculation; determining a stable phase and a phase structure of the system by employing the first principles of quantum mechanics, and calculating elastic performance of a specified component in the research system; preparing a test sample by employing a multivariate diffusion couple experimental method, and carrying out a high-resolution material performance scanning test on the test sample to obtain experimental data; carrying out comprehensive analysis and verification on the experimental and computational data, and establishing the association of alloy components, phase composition and the elastic performance of the research system; and designing the copper alloy material of specified elastic performance according to a data result and the association of the data. By adopting the method, the corresponding relation of the elastic performance of the copper alloy with the alloy components and the phase composition can be obtained quickly; and compared with the traditional design method, the purposiveness of the material design method is stronger, expenditure of manpower and material resources is reduced, and the efficiency of scientific research is improved.

The invention discloses a method for measuring a signal phase angle during frequency deviation of an electrical power system. The method is characterized by comprising the following steps of (1) sampling signals of the electrical power system; (2) mapping deviated pionic/4 of signals; (3) calculating percentage of the frequency deviation; (4) correcting the frequency deviation; and (5) calculating phasor quantity of signals of the electrical power system. The traditional discrete Fourier transform (DFT) phase angle measuring method is low in precision; and particularly, the phase angle errors of the discrete Fourier transform method are high under the condition of frequency disturbance. Dynamic phase angle errors in phase angle errors can be reduced as far as possible by using orthogonal properties of a coordinate axis in a coordinate system and a four-phase equilibrium relation; the dynamic phase angle errors are well corrected by the method; and the phase angle measurement accuracy is improved. By an algorithm, measurement capacity on electrical power signals with various interferences is high on the premise that the frequency tracking measurement precision is guaranteed.

A microwave resonator apparatus (35) includes a microwave resonant cavity (36) in fluid communication chamber (38) are dimensioned to ensure high attenuation of resonant electromagnetic fields without impeding fluid flow. The resonant properties of the cavity (36) are therefore completely insensitive to variations in the volume of the pressure chamber (38). The resonator has a specialised reentrant geometry. Consequently, two of the cavity's resonant modes depend sensitively upon the formation and volume of any liquid phase present in the cavity. The apparatus and the method are suitable for measuring dielectric properties and phase envelope of fluid mixtures (such as a gas condensate fluid). The apparatus can be used for making several phase envelope measurements without risk of contamination.

The invention discloses a liquefied natural gas (LNG) cold energy-driving seawater desalination device and method with double functions of vaporization and freezing. The operating principle of the device is based on the characteristic that the phase equilibrium pressure of water vapor decreases along with the decrease of the temperature, the cold energy of LNG is utilized to realize low temperature and vacuum, the water vapor on the surface of the raw material seawater is pumped to promote the vaporization of seawater and the endothermal effect of the vaporization process is utilized to ensure that the raw material seawater is frozen, i.e., fresh water is separated from seawater through the two phase transition processes of vaporization and freezing. The device mainly comprises a water pump, a filter, a degassing tower, an air-precooled heat exchanger, a vaporization-crystallization device, a crystallizer, a scrubbing separator, a melting device, a vacuum pump and the like. The deviceis mainly characterized in that LNG cold energy driving is adopted, gas-liquid-solid separation is performed at the triple point of seawater, and high-quality fresh water and sea icy freshwater are obtained; and the device has the advantages of cold energy cascaded utilization, higher energy efficiency, higher fresh water yield and the like. In addition, an LNG receiving station is usually built by the sea and has good geopolitical combinability with a seawater desalination project.

The invention relates to supercritical carbon dioxide experimental equipment, which comprises a carbon dioxide gas cylinder, a cold trap, a high-pressure metering pump, a gas inlet micrometering valve and a high-pressure container, wherein a gas inlet tube, a thermoelectric couple sleeve and a discharge tube penetrate through a top cover of the high-pressure container; a polytetrafluoroethylene magnetic force stirrer is arranged at the bottom of the high-pressure container, and a magnetic force stirring controller is arranged on the outer part below the high-pressure container; and the high-pressure container is arranged in a constant temperature cavity of a constant temperature device. In addition, the output end of the discharge tube is communicated to a material collector by a discharge micrometering valve. The supercritical carbon dioxide experimental equipment is suitable for a supercritical carbon dioxide extraction technology, chemical reaction in supercritical carbon dioxide, the purification of crude products in the supercritical carbon dioxide, and the measurement of phase equilibrium and melting points of solutes in the supercritical carbon dioxide. The supercritical carbon dioxide experimental equipment has the characteristic of simple structure, and is suitable for multiple supercritical carbon dioxide experiments.

The invention provides a marine gas hydrate three-phase dynamic virtual construction method. According to the method, a view angle is interactively positioned by eyeball tracking, the position of an observation point is acquired by three-dimensional space geometric analysis, the pressure value and the temperature value of the observation point are acquired according to a depth pressure conversionand marine temperature field model, the physical state of a gas hydrate at the position of the observation point is judged according to a gas hydrate three-phase state judgment model built according to geothermal gradient, water temperature gradient, deep sea gas hydrate phase equilibrium curves and the like, the physical state is dynamically displayed in a three-dimensional scene, and eyeball tracking driven gas hydrate three-phase state dynamic simulation effects are achieved. Marine gas hydrate three-phase conversion virtual construction and expression are achieved, so that the stabilizingmechanism of the marine gas hydrate is visually and vividly expressed, gas hydrate three-phase virtual scenes of different sea areas can be built based on the method, and the method is widely used forthe fields of marine gas hydrate laboratory test analysis research, on-site mining simulation, teaching, popularization of science and the like.

The invention discloses a mine protection power monitoring system. The mine protection power monitoring system comprises a main controller terminal and a plurality of monitoring terminals, wherein the main controller terminal and the plurality of monitoring terminals are connected through a communication network. The monitoring terminals output differential signal information to the main controller terminal and receive differential signal information of the main controller terminal. The mine protection power monitoring system can be used for a mine high-voltage distribution switch and a high-voltage magnetic starter, and contains 6kV and 10kV voltage classes and 5-630A rated operational currents. Because a double-central-controller unit is used for controlling, the power monitoring system is higher in precision, more accurate, more stable in performance and faster in processing speed, and can set and calibrate in a full digitalization mode. The power monitoring system is provided with protection functions such as undervoltage, overvoltage, overload, short circuit, phase equilibrium, earth leakage protection (grounding protection) and insulation monitoring, remote metering-remote signaling-remote controlling-remote regulating functions in a form of RS485 or a controller area network (CAN) bus, a calendar clock, and a fault memorizing and searching function. A current transformer or a hollow current transformer can be selected for use without replacing current transducers for different rated current classes.

The invention provides a process for concentrating titanium white waste acid through generation of crystalline hydrate by utilizing the phase equilibrium principle. According to the process, ferrous sulfate, copper sulfate or other sulfate capable of forming crystalline hydrates are added into titanium white waste acid, the phase equilibrium process is controlled by utilizing the equilibrium relationship among sulfuric acid, water and sulfate, moisture is brought out by generating sulfate hydrates containing different crystal water and crystallizing and separating the sulfate hydrate from diluted sulfuric acid, and the diluted sulfuric acid can be concentrated; and the separated ferrous sulfate and other crystalline hydrates can be recycled after being dried to remove crystal water; different concentration degrees can be realized by controlling the mode of generated crystalline hydrate and can be adjusted according to requirement, and a concentrated sulfuric acid product having an acidconcentration of higher than 60 percent can be obtained; and anhydrous ferrous sulfate and other sulfates capable of forming crystalline hydrate can be utilized as raw materials, and the raw materials have wide sources. The process is simple, has low operation temperature, small equipment investment and weak corrosion, moisture of waste acid is not needed to be directly evaporated, energy consumption is low, and resource utilization of titanium white waste acid can be realized.

The invention an experimental apparatus and method for preparing a natural gas hydrate rock sample via two-step process; the apparatus according to its technical scheme comprises a cold storage, a reactor, a confining pressure pump, a gas supply system, a computer data collection system and the like; all experimental systems are positioned in the low-temperature cold storage, and cold storage temperature is adjusted through a temperature control system of the cold storage; the output end of the confining pressure pump is connected with the reactor; the output end of the gas supply system is connected with the reactor; a gas flowmeter and a temperature sensor are connected with the computer data collection system. The method for preparing the natural gas hydrate rock sample via two-step process comprises the steps of first, generating hydrate in a rock sample; second, decreasing methane gas pressure to around phase equilibrium pressure but slightly higher than phase equilibrium pressure so that the hydrate is recrystallized. By using the apparatus and method, the problem in the preparation of natural gas hydrate rock samples is solved, a hydrate rock sample closer to an actual hydrate reservoir in physical mechanical characteristic can be acquired, and experimental support is provided for the drilling and development of natural gas hydrate resources.