68 results about "Co2 partial pressure" patented technology

The invention discloses a method and a device using the expired gas partial pressure of CO2 to monitor and estimate the CO2 partial pressure of arterial blood, belonging to the clinical respiratory monitoring technology field. The technical points includes using a CO2 analyzing and monitoring instrument for the real-time acquisition on the expiratory flow, the time and CO2 partial pressure PaCO2 to be input into a computer; processing input data; when the instant flow is 22.25 plus or minus 0.08 percent or the instant slope of the flow speed/time curve is 0.13 plus or minus 0.19, (a) and the difference of the corresponding CO2 partial pressures is within about 5 percent, the average value of the corresponding CO2 partial pressure is basically the same with the arterial blood CO2 partial pressure; (b) the corresponding CO2 partial pressure difference is over about 5 percent, the mathematical model fitting is implemented on the CO2 partial pressure/time curve to estimate the corresponding arterial blood CO2 partial pressure. The invention can be applied to clinical wound-free monitoring COPD patients, especially the PaCO2 of severe COPD patients.

The invention discloses a contrast simulation testing device for carbon dioxide corrosion resistant performance of steel and a testing method thereof. The device comprises a reaction kettle, a solution pond and a pressure adjusting device, wherein the solution tank is connected with the reaction kettle by a liquid control valve; a heating rod and a heat insulation material are wound on the outer wall of the reaction kettle; a thermal couple and a temperature adjuster are arranged in the reaction kettle; a sample clamp connected with a stirring device is arranged in the reaction kettle; and a pressure adjusting device comprises a CO2 gas tank and an N2 gas tank which are connected with the bottom of the reaction kettle. The method is used for contrasting and simulating a condition that a pipeline steel material is corroded by CO2 in crude oil so as to evaluate corrosion velocity of the steel material of which the temperature is between 90 and 120 DEG C, CO2 partial pressure is between 1 and 2.4MPa in the solution. The CO2 corrosion resistant performance of the steel with different materials, steel levels and thicknesses can be tested at the same time, and the test is convenient and easy. Corrosion simulation test of various oil fields is performed by adjusting the temperature, partial pressure and solution components.

The invention provides a method and an apparatus for dynamically and safely determining corrosive defects inside a conveying pipeline. The method comprises the following steps: acquiring a corrosion expansion rate of a conventional metal material for a conveying pipeline under different CO2 partial pressure, H2S partial pressure, chloride contents and different stress levels; establishing a mathematic model of the corrosion expansion rate by utilizing a self-adaptive neural-fuzzy inference system according to the acquired corrosion expansion rate; acquiring the CO2 partial pressure, a H2S content, the chloride content and the stress level of a pipe section at which a corroded portion of the pipeline is located, and predicting the corrosion expansion rate according to the established mathematic model; and establishing a pipeline limit-state equation, and acquiring a safety state of the pipeline. The invention also provides the apparatus for dynamically and safely determining the corrosion defects inside the conveying pipeline. By adopting the method and the apparatus for dynamically and safely determining the corrosion defects inside the conveying pipeline, the problem that the safety state of the oil-gas conveying pipeline containing the corrosion defects is difficult to determine dynamically and accurately can be solved.

Use of an absorption agent for removing acid gases from a fluid flow, comprising an aqueous solution of 2,2'-(ethylenedioxy)-bis-(ethylamine).

The invention provides a high-acidity gas field wellbore string material optimization evaluation system and method, and belongs to the field of high-acidity gas field development. The high-acidity gas field wellbore string material optimization evaluation system includes a corrosion rate prediction model and a stress corrosion cracking boundary model; the corrosion rate prediction model includes H2S partial pressure-temperature, H2S partial pressure-CO2 partial pressure and elementary substance S-pH value corrosion rate prediction drawing boards; the stress corrosion cracking boundary model includes a failure boundary of a material under conditions of the temperature and the H2S partial pressure and a failure boundary of the material after sulfur is separated out under the conditions of the temperature and the H2S partial pressure. The system and the method solve the problems that due to a corrosion simulation evaluation method and a corrosion prediction model and software, a gas field highly containing H2S/CO2 is lack of basis on material selection, and provide a theoretical support for high-acidity gas field development and safety production.

The invention provides an oil layer-section oil casing pipe for exploiting thick oil by a method of combustion drive, which comprises the following chemical components in percentage by weight: 0.06-0.14% of C, 0.20-0.50% of Si, 0.20-0.70% of Mn, P which is greater than or equal to 0 and less than or equal to 0.015, S which is greater than or equal to 0 and less than or equal to 0.010, 8.0-10% of Cr, 0.80-1.20% of Mo, Al which is greater than or equal to 0 and less than or equal to 0.015wt, Cu which is greater than or equal to 0 and less than or equal to 0.15wt, Ni which is greater than or equal to 0 and less than or equal to 0.40, and the balance of Fe. The invention also provides a production method of the oil layer-section oil casing pipe for exploiting thick oil by the method of combustion drive. The invention has the effect that the casing pipe produced according to the steel grade and the production technology has the characteristics that the yield strength of the material of the casing pipe reaches more than 580MPa at the environmental temperature of 550 DEG C, the endurance strength of 100000 hours at 650 DEG C reaches more than 70MPa, and the average corrosion rate of the casing pipe is lower than 0.32mm/year under the environmental conditions that the temperature is 150 DEG C, the CO2 partial pressure is 1.5MPa and the flow rate is 1.5m/s, thereby completely meeting the use requirements of oil layer-section casing pipes of casing pipe columns at the innermost layers of gas-injection wells and production wells for exploiting thick oil by the method of combustion drive.

The invention discloses a method for heading a high-strength toughness titanium alloy drill rod material. A titanium alloy drill rod is composed of, by weight, 5-7 parts of Al, 2.0-3.0 parts of Nb, 0.5-2.0 parts of Zr, 0.7-1.2 parts of Mo, 0.02-0.05 part of Fe, 0.01-0.03 part of Si and the balance being Ti. The method for heading the drill rod material composed of the compositions includes the steps that 1, smearing of glass powder is performed; 2, induction heating is performed; 3, primary heading is performed; 4, secondary heating is performed; 5, secondary heating is performed; 6, heat treatment is performed on integral pipes. The method has the advantages that after the titanium alloy drill rod material is headed, and the requirements for 110 ksi drill rod products of API standards are met, wherein mechanical properties are that the yield strength is larger than 758 Mpa, impact toughness is larger than 41 J, and the elongation rate is larger than 11%; the titanium alloy drill rod material can be used in a strict corroding environment that H2S partial pressure is 5 Mpa, CO2 partial pressure is 11 Mpa, the concentration of NaCl is 100000 ppmCl, and the native sulfur is 3 g/L. The showed capacity of resistance to hydrogen sulfide stress corrosion is far higher than that of a common API drill rod, and the titanium alloy drill rod material is the optimal material replacing carbon steel in exploitation and application of oil and gas, and meets the requirements of oil fields corroding the environment.

The invention relates to a high-acidity gas well oil-based annulus protection fluid and belongs to the field of oil field chemical technology. The high-acidity gas well oil-based annulus protection fluid is composed of following components, by mass, 1.0-1.5% of a corrosion inhibitor, 0.5-1.5% of dithiocyanomethane and the balanced being white oil. The annulus protection fluid has good thermal stability and strong anti-high-temperature performance. Under an environment with total pressure being 7 MPa, H2S partial pressure being 1 MPa and CO2 partial pressure being 1 MPa, the annulus protection fluid is not more than 0.0018 mm/a in corrosion rate on A3 steel sheets and is not more than 0.0047 mm/a in corrosion rate on N80 steel sheets, is not more than 3/ml in sterilization effects on saprophytic bacteria, iron bacteria and sulfate reducting bacteria. The annulus protection fluid can effectively prevent corrosion and destroy on oil pipelines in the well environment, can provide a durable protective function and greatly prolongs service life of annulus tubular column in the well. An oil phase is formed by the industrial-grade white oil so that the annulus protection fluid has low damage on human body and environment.

The invention relates to an inhibitor suitable for corrosion prevention of a pitshaft of a CO2 driving extraction shaft, which belongs to the oil filed chemical field and solves the problem that an oil sleeve is corroded in the high CO2 partial pressure environment. The inhibitor comprises the following components in percentage by weight: 15 to 23 percent of diethylenetriamine, 20 to 30 percent of decanedioic acid, 10 to 15 percent of thiourea, 4 to 7 percent of dodecyl dimethyl benzyl ammonium chloride, 1 to 3 percent of stearyl alcohol polyethenoxy ether, 5 to 10 percent of absolute ethyl alcohol and 12 to 45 percent of water. In the high CO2 partial pressure environment, the inhibitor has over 90 percent of corrosion inhibition rate without pitting corrosion, evenly forms a film on a metal tube with good adsorption effect, and has good emulsion breaking property on crude oil with 100 percent of emulsion breaking underground for two hours, no influence on the post dewatering treatment of the crude oil, as well as the advantages of low toxicity, environmental protection, simple preparation method and low cost.

A CO2 and Cl<-> corrosion resistant high-strength 15Cr oil pipe for high-temperature high-pressure wells comprises the following compositions in percent by weight: carbon, <=0.03 wt%; silicon, 0.2-0.5 wt%; manganese, 0.2-0.6 wt%; phosphorus, <= 0.02 wt%; sulfur, <= 0.005 wt%; chromium, 14.5-15.3 wt%; molybdenum, 1.7-2.4 wt%; copper, 0.6-1.0 wt%; nickel, 6.5-7.5 wt%; tungsten, 0.4-0.7 wt%; titanium, 0.002-0.007 wt%; boron, 0.001-0.005 wt%; niobium, 0.04-0.09 wt%; vanadium, 0.03-0.07 wt%; nitrogen, 0.01-0.1%; oxygen, <= 0.001 wt%; hydrogen, <= 0.000005 wt%; controlled compositions: arsenic, <=0.03 wt%; antimony, <=0.03 wt%; and antimony, <=0.03 wt%; and the balance iron. According to the 15Cr oil pipe, the minimum yield strength is 925 MPa (125ksi steel grade), the critical usage temperature is 210 DEG C, the CO2 partial pressure can be 10 MPa or more, the Cl<-> concentration can be 120000 mg/L, the 15Cr oil pipe has certain H2S stress corrosion cracking resistant performance, and compared with a super II type 13Cr martensite stainless steel oil pipe material, the increased cost is not large.

A method and system for processing an input fuel gas and steam to produce separate CO2 and output fuel gas streams. The method comprises the steps of using a decarboniser segment for reacting at least a solid sorbent reacts with the fuel gas and steam to remove carbon from the input fuel gas and to produce the output fuel gas stream in an exhaust gas from the decarboniser; using a calciner segment for reacting the solid sorbent from the decarboniser segment therein to release the CO2 into the CO2 gas stream; wherein CO2 partial pressures and temperatures in the decarboniser and calciner segments respectively are controlled such that the temperature in the decarboniser segment is higher than the temperature in the calciner.

The invention discloses a device for noninvasively detecting the level of carbon dioxide in human blood. The device comprises a blowing nozzle, a prolonged expiration induction device for a user to conveniently expire, an infrared adapter window body, a signal detection processing device and a terminal, wherein the prolonged expiration induction device is used for providing expiration positive pressure, limiting flow velocity and inducing the continuous prolonged expiration of expired gas; the infrared adapter window body is used for a detection gas chamber of the expired gas, and detection infrared rays pass through the infrared adapter window body; the signal detection processing device is used for emitting the detection infrared rays to the infrared adapter window body, and detecting the CO2 partial pressure of the expired gas; the terminal is used for receiving, processing and displaying the data of the signal detection processing device. According to the device, the prolonged expiration induction device can be used for providing expiration positive pressure and limiting the flow velocity, so that a patient can be helped to conveniently prolong the expiration time and improve expiration effects; with the use of the prolonged expiration induction device, the flow velocity and pressure of the expired gas are regular, the measurement standardization degree of a testee (patient) is favorably improved, and the consistency of a measurement result is ensured.

The invention relates to a sea-air carbon dioxide flux measuring device and a measuring method thereof, belonging to the field of sea-air measurement. The sea-air carbon dioxide flux measuring device comprises a control and data acquisition module, a carbon dioxide partial pressure measuring sensor and a sampling module. Under the control of the control and data acquisition module, the sampling module respectively extracts a water sample and an air sample to the carbon dioxide partial pressure measuring sensor for measurement to obtain sea-air carbon dioxide flux. The invention realizes the device which is provided with the CO2 partial pressure measuring sensor based on acid-base indicators and an optical fiber technology and can synchronously measure the CO2 partial pressure in surface seawater and sea surface atmosphere to further estimate the sea-air CO2 flux. Compared with the prior art, the invention has the advantages that the structure is simple, the stability is high, the power consumption is low and the device is suitable for long-time serial automatic observation on anchored platforms.

The invention discloses a preparation method of an adsorbent for adsorbing and separating CO2. The method comprises steps as follows: first of all, an activated UiO-66-SO3H sample is prepared; then, the modified sulfated metal organic framework material UiO-66-SO3H is post-processed with ammonium hydroxide, a reaction is performed at a temperature of 40-60 DEG C for 6.0-12.0 h, the mixture is cooled in a 0-DEG C ice and water mixture for 10 min, centrifugally washed three times with deionized water and a low-boiling-point organic solvent respectively and filtered, and white powder is obtained; the white powder is transferred to an oven to be dried at a temperature of 80-100 DEG C for 10-20 h, and the adsorbent is obtained. The adsorbent prepared with the method has higher adsorbing capacity and higher adsorptive selectivity to CO2 in the low CO2 partial pressure.

The invention discloses a method for testing pipeline steel for carbon dioxide corrosion under bending stress. The method comprises the following steps: obtaining a bent pipeline steel sample; preparing a corrosion solution by adopting simulated oil well produced liquid; putting the bent pipeline sample into a closed reaction kettle, adding a corrosive solution, and introducing CO2 gas; controlling the temperature of closed reaction kettle to be 50-90 DEG C, the CO2 partial pressure to be 0.9-1.2MPa and flowing speed to be 1.3-1.7m/s; taking out the bent pipeline steel sample, soaking in a pickling solution, rinsing with deionized water and absolute ethyl alcohol, and drying by blowing; and weighing the blow-dried bent pipeline steel sample to obtain a corrosive rate R. According to the method, corrosion of pipeline steel under a service environment can be actually simulated, the CO2 corrosion resistance of pipeline steel can be quickly and accurately inspected, and the carbon dioxidecorrosion rate of the pipeline steel under the bending stress can be accurately obtained.

The invention relates to the field of carbon dioxide mineralization, in particular to a method for mineralizing carbon dioxide by production waste residues in a potassium feldspar sub-molten salt method. The method comprises the following steps: mixing smashed and ground potash feldspar ore powder, a sub-molten salt solvent and calcium oxide, mixing and performing solid-liquid separation to obtain solid filter residues; mixing the solid filter residues and water, and putting the mixture into a reactor, wherein the solid to liquid ratio is 1:1 to 1:100; introducing CO2 gas, controlling the CO2 partial pressure to be greater than 0.3MPa, the temperature at 30 to 400 DEG C and the stirring rate at 200 to 800 revolutions per minute, and reacting for 1-4 hours for solid-liquid separation to obtain a calcium carbonate-containing mineralization product. By adopting the carbon dioxide mineralization method, recycling of silicate waste residues produced in a process of preparing a potassium fertilizer from the potassium feldspar is realized, and a practically-feasible novel thought is provided for mineralization fixing of CO2 and realization of CO2 emission reduction.

The invention relates to a medical analytical tester with controllable testing temperature, which can work normally under any environment with the temperature not higher than 55 DEG C, and can improve testing speed, precision and accuracy, in particular to a medical analytical tester used for testing blood parameters comprising cholesterol, triglyceride, blood sugar, glycolated hemoglobin, lactic acid, uric acid, pH of blood, oxyhemoglobin, potassium ions, sodium ions, calcium ions, magnesium ions in blood, HCO3-, PO43-, oxygen partial pressure, CO2 partial pressure and other indexes. The tester comprises a micro sample working chamber for accommodating and fixing testing biochips or testing strips and testing, an electronic system which is organically connected with the working chamber and used for reading and outputting a testing result, a screen for displaying the testing result, and a heating element or a setting for controlling the temperature of a tested sample.

The invention discloses an offshore platform technology system and method for lowering exporting crude oil CO2 partial pressure. The offshore platform technology system comprises a high CO2 crude oilproduction manifold, a high CO2 crude oil production separator connected with the high CO2 crude oil production manifold, one or more sets of connected low CO2 crude oil production manifolds, low CO2crude oil production separators and a crude oil exporting pump. An oil phase outlet of the high CO2 crude oil production separator is successively connected with inlets of all low CO2 crude oil production separators through pipelines, and the pipelines of the oil phase outlet of the last-connected low CO2 crude oil production separator is provided with the crude oil exporting pump. The high CO2 oil phrase is separated from high CO2 production well crude oil through the high CO2 crude oil production separator, and low CO2 production well crude oil enters the low CO2 crude oil production separators so that the oil phase can be separated, oil phase CO2 partial pressure is suitable for a carbon steel material exporting marine pipe, and exporting is achieved through the exporting marine pipe ofthe crude oil exporting pump. According to the offshore platform technology system and method for the lowering exporting crude oil CO2 partial pressure, the CO2 partial pressure of the high CO2 crudeoil can be decreased, and thus the CO2 partial pressure is suitable for the exporting marine pipe made from the carbon steel material.

The invention discloses a green method for preparing battery grade nickel sulfate from nickel salt. The green method for preparing battery grade nickel sulfate from the nickel salt comprises the stepsthat the nickel salt and ammonium salt are mixed, ammonia water is added, ammonia leaching reaction is carried out, a first-stage ammonia leaching solution and first-stage ammonia leaching residues are obtained through solid-liquid separation, the first-stage ammonia leaching solution is subjected to ammonia distillation, the pH of the solution obtained after ammonia distillation is adjusted, then nickel powder is prepared through adopting a pressurized hydrogen reduction method; filtrate obtained by carrying out multi-stage ammonia leaching reaction and solid-liquid separation on the first-stage ammonia leaching residues returns to first-stage ammonia leaching slurrying, filter residues is washed by using a three-stage CCD, then a carbonization process is adopted, CO2 partial pressure, reaction time and reaction temperature are controlled, a carbonized liquid and carbonized residues are obtained, and pyrolysis and calcination on the carbonized liquid are carried out, then a magnesiumoxide product is obtained; and the carbide residues are subjected to reduction smelting through a pyrogenic process, and upper-layer rich-manganous slags and lower-layer nickel-cobalt-manganese slagsare obtained after crushing and screening. According to the green method for preparing battery grade nickel sulfate from the nickel salt, the method is easy to control, green and energy-saving, the ammonia water and the ammonium salt in the system can be recycled, a new process for preparing battery grade nickel sulfate without wastewater, waste residues and extraction is realized, and the production cost is greatly reduced.

The invention discloses a high-strength tough titanium alloy drill stem material friction welding method. A titanium alloy drill stem comprises ingredients including, by weight, 5%-7% of Al, 2.0%-3.0% of Nb, 0.5%-2.0% of Zr, 0.7%-1.2% of Mo, 0.02%-0.05% of Fe, 0.01%-0.03% of Si and the balance Ti; and the friction welding method of the titanium alloy drill stem using the above compositions includes the steps that (1) a connector is rotated; (2) pressure is applied; (3) friction welding is carried out; and (4) welding seam induction heat treatment is carried out. The high-strength tough titanium alloy drill stem material friction welding method has the beneficial effects that the combination properties obtained after titanium alloy drill stem material friction welding can meet the conditions that the strength of extension is larger than 900 MPa, and the yield strength is larger than 800 MPa; the 10 mm*10 mm longitudinal ballistic work of a welding seam at 21 DEG C can reach higher than 36 J; the welding seam hardness is smaller than 32 HRC; H2S partial pressure can be 5 Mpa, the CO2 partial pressure can be 11 Mpa, the NaCl concentration is 100000 ppmCl, the elemental sulfur shows far higher sulfuretted hydrogen stress corrosion resistance compared with a common API drilling stem when used in the 3 g/L rigor corrosion environment, the drilling stem is the best material for replacing steel in oil and gas exploitation, and the corrosion environment oil field requirement is met.

The invention discloses a low-CO2 partial pressure environment cement sintering system and a cement clinker preparation method, and belongs to the technical field of cement production equipment. The low-CO2 partial pressure environment cement sintering system comprises a smoke chamber, a rotary kiln, a grate cooler, a decomposing furnace, a carbon dioxide capturing and purifying system, a waste heat utilization system, a multi-stage pure oxygen preheater and a multi-stage air preheater, wherein the smoke chamber, the rotary kiln and the grate cooler are communicated in sequence; a high-temperature area of the grate cooler comprises a first cooling area and a second cooling area which are mutually independent, the first cooling area is communicated with the rotary kiln and a tertiary air pipe, and the second cooling area is communicated with the multi-stage air preheater through an air supply pipe; the multi-stage pure oxygen preheater is communicated with the decomposing furnace, the air supply pipe and the carbon dioxide capturing and purifying system; and the multi-stage air preheater is communicated with the decomposing furnace, the smoke chamber and the waste heat utilization system. A low-CO2-concentration and high-temperature low-CO2 partial pressure environment can be formed in the air supply pipe, hot raw materials can be further decomposed in the air supply pipe, and then the CaCO3 decomposition rate can be increased without increasing the temperature of the decomposing furnace.

The invention provides a non-invasive breathing end-tidal carbon dioxide detection method. The method comprises steps of acquiring temperature and CO2 concentration data of exhaled gas, correcting the detected CO2 concentration according to the temperature of the exhaled gas to obtain the corrected CO2 concentration of the end-expiratory gas, according to the corrected CO2 concentration, adopting a gas source component spectral analysis method to obtain CO2 partial pressure parameters, and establishing a CO2 partial pressure periodic change function model, and solving the model to obtain an analysis waveform of the CO2 partial pressure changing along with time. The method has the advantages of high efficiency and high precision.

The invention relates to the measurement field of carbon dioxide, in particular to a fluorinated aromatic hydrocarbon polymer capillary tube gas-permeable membrane sample cell which comprises (1) a sleeve, (2) a fluorinated aromatic hydrocarbon polymer capillary tube, (3) a first sample inlet tube and a second sample inlet tube, (4) a first optical liquid coupling device and a second optical liquid coupling device as well as (5) a first tracer agent tube and a second tracer agent tube, wherein the left and the right sides of the sleeve are respectively provided with an injection hole and a discharge hole; the length of the fluorinated aromatic hydrocarbon polymer capillary tube is longer than that of the sleeve; the capillary tube is inserted into the sleeve from the left end, and is inserted out of the sleeve from the right end; the first sample inlet tube is connected with the injection hole of the sleeve, and the second sample inlet tube is connected with the discharge hole of the sleeve; the first optical liquid coupling device is provided with a three-end joint, and the second optical liquid coupling device is also provided with a three-end joint; and the first tracer agent tube is connected with a second joint of the first optical liquid coupling device, and the second tracer agent tube is connected with a second joint of the second optical liquid coupling device. Compared with the prior art, the invention has high sensing sensitivity and large dynamic range, and is very suitable for researching and developing a CO2 partial pressure field measuring instrument with high accuracy, rapid response and low power consumption.