38 results about "Hydrogen analyzer" patented technology

The invention relates to the technical field of elemental analysis, in particular to an all-elemental analysis method for unknown waste. The all-element analysis instrument provided by the invention comprises an inductively coupled plasma emission spectrometer (ICP-OES), an inductively coupled plasma mass spectrometer (ICP-MS), an X-ray fluorescence spectrometer (XRF), an energy dispersive X-ray spectrometer (EDS), an infrared carbon-sulfur analyzer, an oxygen-nitrogen-hydrogen analyzer, an elemental analyzer (EA), a chemical method, a spark direct-reading spectrometer and an ion chromatograph (IC). The all-element analysis can accurately determine the contents of components and elements in the product, and can provide high-quality and comprehensive data, thereby helping researchers to better understand the interaction and influence among the elements. All-element analysis of the unknown waste is of great significance to improvement of waste resource utilization efficiency, optimization of waste treatment process, promotion of green low-carbon technical progress and formulation of effective resource utilization measures.

The utility model discloses a helium dehydrogenation and purification device taking air as regenerated gas. The helium dehydrogenation and purification device comprises a catalytic dehydrogenation reactor, a first adsorption reactor and a second adsorption reactor, a refrigerant of the heat exchanger is connected with a feed gas source and a compressed air source, a refrigerant outlet of the heat exchanger is connected with an inlet of the catalytic dehydrogenation reactor, an outlet of the catalytic dehydrogenation reactor is connected with a heating medium inlet of the heat exchanger, and a heating medium outlet of the heat exchanger is connected with an inlet of the steam-water separator; inlets of the first adsorption reactor and the second adsorption reactor are connected with an outlet of the steam-water separator and a regenerated waste gas outlet; outlets of the first adsorption reactor and the second adsorption reactor are connected with a product gas outlet and a compressed air source; a hydrogen analyzer and a flow meter are arranged on a pipeline for connecting a refrigerant inlet of the heat exchanger with the feed gas source, and a flow controller and a flow control valve are arranged on a pipeline for connecting the refrigerant inlet of the heat exchanger with the compressed air source; the flow controller is electrically connected with the hydrogen analyzer and the flow meter and can control the opening degree of the flow control valve. The problem that hydrogen-containing gas cannot be provided as regeneration gas in most helium catalytic dehydrogenation purification scenes is solved.

The utility model relates to the technical field of gas detection, in particular to a hydrogen analyzer. The analyzer comprises an analyzer body, a gas inlet formed in the top of the analyzer body, a hydrogen treatment mechanism, a buffer gas supply mechanism and a rotating shaft I, the hydrogen treatment mechanism is arranged on the outer side of the gas inlet through threads; the buffer gas supply mechanism is arranged at the top of the hydrogen treatment mechanism; the first rotating shaft is rotationally arranged on the hydrogen treatment mechanism. According to the utility model, the hydrogen treatment mechanism is arranged, the filter plate is used for blocking and cleaning particle impurities in to-be-detected gas, and the molecular sieve in the filter box and the activated carbon in the placing box are used for absorbing other gases in the to-be-detected gas, so that the impurities can be effectively removed, and the hydrogen is ensured to smoothly enter the analyzer; therefore, the measurement accuracy is improved, the phenomenon that impurities interfere with a hydrogen detection signal and cause deviation of a measurement result is avoided, the concentration of hydrogen can be improved by absorbing other gases, and the measurement accuracy is improved.

The invention relates to a pulse buffer tank non-condensable gas constant-current sampling device in the technical field of wet oxidation decarburization and sulfur removal, which comprises a gas delivery pipe, the gas inlet end of the gas delivery pipe is communicated with an exhaust port at the top of a pulse buffer tank, and the gas outlet end of the gas delivery pipe is communicated with a diameter-expanded hollow pipe; the cooling and washing system is arranged on the gas conveying pipe; the steam-water separation system is arranged on the gas conveying pipe; the air inlet end of the traction pipe penetrates through the side surface of the diameter-expanding and oppositely-arranged pipe and is communicated with the interior of the diameter-expanding and oppositely-arranged pipe, and the air outlet end of the traction pipe is connected with the sample input ends of the hydrogen analyzer and the oxygen analyzer; a suction pump is arranged on the traction pipe, and is used for providing negative pressure to suck the non-condensable gas sample gas in the diameter-expanding paired pipe into the hydrogen analyzer and the oxygen analyzer through the traction pipe; and the refrigeration and dehumidification system is arranged on the traction pipe. The problems that when non-condensable gas in a dissolution pulse buffer tank is sampled, the sampling stability is poor due to pulse pressure, and the detection precision is affected are solved.

The utility model relates to the technical field of environmental monitoring, and particularly discloses a trace hydrogen observation instrument pre-treatment device which comprises a gas collection mechanism, a gas storage mechanism assembled at the top of the gas collection mechanism, and a trace hydrogen analyzer assembled on one side of the gas storage mechanism, the gas collecting mechanism comprises a fixing disc, a gas collecting pipe is fixedly mounted at the bottom of the fixing disc, and gas inlet holes are formed in the surface of the gas collecting pipe; the gas storage mechanism comprises a gas storage barrel fixedly mounted at the top of the fixed disc, a piston disc is slidably mounted in the gas storage barrel, and a movable rod extending out of the gas storage barrel is fixedly mounted at the top of the piston disc; according to the utility model, the interior of the gas storage barrel can be in a negative pressure state, enough gas can be sucked into the gas storage barrel, the situation that the gas is easy to escape and difficult to collect due to interference of external environmental factors is effectively avoided, and the accuracy of monitoring data of the hydrogen concentration in the gas by the trace hydrogen analyzer is improved.

The invention discloses a flow control method in a natural gas and hydrogen mixing system. A static mixer, a hydrogen pipeline assembly, a natural gas pipeline assembly, a mixed gas pipeline and a mixing proportion adjusting unit are included. The hydrogen pipeline assembly comprises a hydrogen pipeline, a pressure adjusting assembly and a first flow adjusting assembly, the natural gas pipeline assembly comprises a natural gas pipeline, a pressure stabilizing assembly and a second flow adjusting assembly, and the pressure stabilizing assembly and the second flow adjusting assembly are arranged on the natural gas pipeline. The introduced natural gas flows through a pressure stabilizing assembly and a second flow adjusting assembly on the natural gas pipeline and then is input into the static mixer through the other end of the natural gas pipeline; the mixing proportion adjusting unit comprises a PLC control unit and a hydrogen analyzer, and the PLC control unit sends control signals to the first flow adjusting assembly and the second flow adjusting assembly according to hydrogen concentration data sent by the hydrogen analyzer.

The utility model discloses a one-to-many hydrogen production system which comprises a plurality of electrolytic cells, hydrogen outlets of the plurality of electrolytic cells are all connected with a gas inlet of a hydrogen-liquid separator, oxygen outlets of the plurality of electrolytic cells are all connected with a gas inlet of an oxygen-liquid separator, and a gas outlet of the hydrogen-liquid separator is connected with a hydrogen rear-end processing unit. A gas outlet of the oxygen-liquid separator is connected with an oxygen rear-end treatment unit, and alkali liquor outlets of the hydrogen-liquid separator and the oxygen-liquid separator are connected with liquid inlets of the alkali liquor heat exchanger and the heating heat exchanger; alkali liquor circulating pumps are arranged on alkali liquor inlets of the plurality of electrolytic baths and are connected with liquor outlets of the alkali liquor heat exchanger and the heating heat exchanger; and an oxygen-in-hydrogen analyzer is also arranged on the oxygen outlet of each electrolytic cell. According to the utility model, the occupied area of equipment is effectively reduced, the overall investment cost of the equipment is reduced, waste heat can be recycled, and the operation is stable.

The utility model relates to an alkaline water electrolytic bath hydrogen production system capable of rapidly detecting oxygen in hydrogen and hydrogen in oxygen, which comprises an electrolytic bath, an alkaline liquor cooler, an alkaline liquor circulating pump, a hydrogen separator, a hydrogen washer, an oxygen separator, an oxygen washer, a hydrogen cooler and an oxygen cooler, an oxygen side outlet of the electrolytic cell is connected with the oxygen preseparator, the oxygen-in-hydrogen analyzer is connected with a gas phase region of the hydrogen preseparator through a sampling pipeline, and the hydrogen-in-oxygen analyzer is connected with a gas phase region of the oxygen preseparator through a sampling pipeline. According to the utility model, the hydrogen sampling point of the oxygen-in-hydrogen analyzer is arranged in the gas phase region of the hydrogen preseparator, and the oxygen sampling point of the oxygen-in-hydrogen analyzer is arranged in the gas phase region of the oxygen preseparator, so that the data of the oxygen-in-hydrogen analyzer and the data of the oxygen-in-hydrogen analyzer can reflect the current actual operation data of the electrolytic cell; the hysteresis of detection data and actual operation data is reduced, and the operation safety of the electrolytic cell is improved.

The invention relates to the technical field of water electrolysis hydrogen production in the field of new energy, in particular to an electrolytic bath outlet sampling system which can conveniently detect the running state of an electrolytic bath and comprises a first electrolytic bath outlet pipe and a second electrolytic bath outlet pipe. The end parts of the outlet pipe of the electrolytic cell I and the outlet pipe of the electrolytic cell II are connected with one end of an oxygen separator and are respectively provided with a sampling pipe connected with an oxygen analysis and separation tank, a partition plate is arranged in the oxygen analysis and separation tank, and two gas outlet pipes connected with an analyzer for hydrogen in oxygen are arranged at the top of the oxygen analysis and separation tank; an alkali liquor outlet pipe is arranged at the lower part of the other end of the oxygen separator, an oxygen cooler is arranged at the upper part of the other end of the oxygen separator, a gas pipe at the top of the oxygen cooler is connected with the oxygen scrubber, and an oxygen outlet is formed in the top of the oxygen scrubber.

The utility model discloses a device for measuring the content of dissolved hydrogen in a pressurized water reactor primary loop coolant, which comprises a cabinet, the cabinet is provided with a measuring chamber, and a hydrogen analyzer is arranged in the measuring chamber; each hydrogen analyzer is connected with a sample feeding pipeline and a sample discharging pipeline; the first end of the sample introduction pipeline penetrates through the cabinet, the second end of the sample introduction pipeline is connected with an inlet of the hydrogen analyzer, and the part, located in the cabinet, of the sample introduction pipeline is provided with a first adjusting valve, a first pressure gauge and a flow meter; the first end of the sample outlet pipeline penetrates through the cabinet, the second end of the sample outlet pipeline is connected with an outlet of the hydrogen analyzer, and at least one second pressure gauge is arranged at the part, located in the cabinet, of the sample outlet pipeline. The device for measuring the content of dissolved hydrogen in the pressurized water reactor primary loop coolant is provided with the first regulating valve, the first pressure gauge, the flowmeter and the second pressure gauge, so that the sample water flow and the measurement back pressure of the hydrogen analyzer can be read and regulated, and the measurement accuracy of the hydrogen analyzer is improved. A sample outlet pipeline is arranged, so that radioactive samples can be recycled.

The invention discloses a beryllium carbide preparation and purity analysis method, and belongs to the technical field of materials. The preparation method of the beryllium carbide comprises the following steps: S1, carrying out vibration milling and mixing on beryllium powder and carbon powder in a molar ratio of 2: 1 to obtain beryllium-carbon mixed powder; s2, putting the beryllium-carbon mixed powder into a lower electrode high-purity graphite crucible of a pulse infrared oxygen-nitrogen / oxygen-nitrogen-hydrogen analyzer, closing an electrode furnace, and heating by executing an instrument analysis program to obtain a beryllium carbide sample block; s3, crushing the beryllium carbide sample block to obtain first beryllium carbide powder; s4, dispersing the first beryllium carbide powder into absolute ethyl alcohol for ultrasonic cleaning to obtain a layered ethyl alcohol-beryllium carbide emulsion; s5, filtering the layered ethanol-beryllium carbide emulsion by adopting a pouring method, and taking an upper-layer filtrate as second beryllium carbide powder; and S6, the second beryllium carbide powder is ignited after being wetted with absolute ethyl alcohol, and third beryllium carbide powder is obtained and serves as a final product.

The utility model relates to the technical field of lofting tools for oxygen-nitrogen-hydrogen analyzers, in particular to a lofting device for an oxygen-nitrogen-hydrogen analyzer. According to the utility model, the tinfoil tube is adopted to isolate a sample from the sample channel, so that the sample is prevented from being in direct contact with the sample channel, the friction force between the sample and the sample channel is reduced, the sample is ensured to fall off smoothly, and when the sample and the inner wall of the tinfoil tube are blocked, the tinfoil tube can be slightly shaken up and down to enable the sample to fall off smoothly; according to the utility model, the problem that the sample is blocked in the sample channel due to the fact that the outer diameter of the sample is close to the inner diameter of the sample channel or burrs are arranged on the periphery of the sample is avoided; through the arrangement of the observation mirror assembly, the condition that a tinfoil tube and a sample pass through the interior can be conveniently observed, the angle between the lens assembly I and the lens assembly II is adjusted, the condition that the tinfoil tube and the sample pass through the interior can be conveniently observed through refraction between the lens I and the lens II, and observation at the position higher than equipment is not needed.

The invention discloses a hydrogen analyzer and a control method thereof.The hydrogen analyzer comprises an analyzer body, a sensor probe and a wire harness, one end of the sensor probe is connected with the analyzer body through the wire harness, an air inlet and an air outlet are formed in a port of the other end of the sensor probe, and the sensor probe comprises an electromagnetic micro-switch, a gas inlet and a gas outlet, the electromagnetic micro switch is fixedly arranged at the port of the sensor probe, and an air inlet channel and an air outlet channel are arranged in the electromagnetic micro switch; elastic diaphragms are arranged on ports of one ends, close to the air inlet and the air outlet, of the air inlet channel and the air outlet channel; the opening degree of the elastic membrane is controlled through a control circuit. The gas detection cavity is communicated with the gas inlet channel and the gas outlet channel, and a gas flow sensor and a thermal conductivity hydrogen sensor are fixedly arranged in the gas detection cavity. According to the hydrogen analyzer, gas passes through the electromagnetic micro switch and the gas flow sensor, the electromagnetic micro switch can be accurately controlled, and the purpose of controlling the gas flow rate is achieved.

The invention discloses a deep hydrogen removal device and method for helium purification, and relates to the technical field of gas purification, the method comprises a pretreatment unit, the pretreatment unit comprises a pre-filter and a gas flow adjusting device which are connected in sequence, and the pretreatment unit is used for pretreating untreated helium; the core purification unit comprises a first-stage adsorption tower and a second-stage adsorption tower which are arranged in series, the first-stage adsorption tower is filled with an efficient dehydrogenation metal getter, and the second-stage adsorption tower is filled with a chemical active oxide adsorbent; the dehydrogenation module is used for carrying out dehydrogenation treatment on the pretreated helium twice; the post-treatment monitoring unit comprises a precise filter and an online hydrogen analyzer which are connected in sequence, and is used for precisely filtering the helium subjected to dehydrogenation treatment twice, detecting the content of hydrogen in the helium subjected to precise filtering, and sending the detected hydrogen to the online hydrogen analyzer; the problem that high working efficiency is difficult to guarantee while hydrogen is deeply removed to the sub-ppm level in an existing helium purification technology can be solved.

The utility model relates to the technical field of cleaning of oxygen-nitrogen-hydrogen analyzers, in particular to a cleaning device for an oxygen-nitrogen-hydrogen analyzer, which comprises a fixed cylinder, a small motor is fixedly mounted at the top of the fixed cylinder, a rotating rod is fixedly connected to the output end of the small motor, and a cleaning brush is arranged at one end, far away from the small motor, of the rotating rod. A mounting cylinder is fixedly connected to the top end of the interior of the fixing cylinder, ejector bodies are fixedly connected to the two ends of the arc-shaped surface of the mounting cylinder, and a limiting rod is fixedly connected to the fixed top end of the arc-shaped surface of the fixing cylinder. The small motor drives the rotating rod and the cleaning brush to rotate, manual cleaning is not needed in the using process, operation is convenient and fast, and the using efficiency is improved; and through self-adaptive adjustment of a limiting rod, adjustment of positions and force of a cleaning brush and a cleaning scraper by a first electric push rod and a second electric push rod and the like, the cleaning device can better adapt to different structures in the oxygen-nitrogen-hydrogen analyzer, and the adaptability of the device is improved.

The invention discloses an oxygen, ammonia and hydrogen analyzer with three parallel detectors for soil detection, relates to the technical field of soil detection, and solves the problems that the efficiency is low and detection gas leakage is easy to occur when the content of oxygen, ammonia and hydrogen in soil is detected. The invention discloses an oxygen-ammonia-hydrogen analyzer with three parallel detectors for soil detection. The oxygen-ammonia-hydrogen analyzer comprises a bottom plate, the soil sample treatment structure is mounted at the top of the bottom plate; the gas conversion and separation mechanism is mounted at the top of the soil sample treatment structure; the gas-liquid analysis container is arranged at the top of the gas conversion and separation mechanism; the parallel detection structure is arranged on the side surface of the gas-liquid analysis container and is positioned at the top of the gas conversion and separation mechanism. According to the soil oxygen, ammonia and hydrogen content detection device and method, through the mode that oxygen, ammonia and hydrogen elements in soil are converted into gas-liquid phases, and gas-liquid phase mixed gas is subjected to separation detection, the detection accuracy of the content of oxygen, ammonia and hydrogen in the soil is guaranteed. Meanwhile, when the liquid phase is conveyed and detected, the problem of leakage is not prone to occurring.

The utility model relates to a passive hydrogen recombiner catalytic plate periodic test and regeneration device which comprises a support, a detection device and a regeneration device, the detection device comprises a detection heating box, a first gas inlet assembly and a first gas outlet assembly, and the first gas inlet assembly is connected to the gas inlet end of the detection heating box; the first gas outlet assembly comprises a first gas outlet adjusting pipeline and a first gas outlet analysis pipeline, and the first gas outlet adjusting pipeline and the first gas outlet analysis pipeline are connected to the gas outlet end of the detection heating box in parallel; the first air outlet adjusting pipeline is provided with a first air outlet flow adjusting valve; the first gas outlet analysis pipeline is provided with a first gas outlet flow meter and a hydrogen analyzer; the regeneration device comprises a regeneration heating box, a second air inlet assembly and a second air outlet assembly, and the regeneration heating box is located below the detection device; the second air inlet assembly is connected to the air inlet end of the regeneration heating box; the second air outlet assembly is connected to the air outlet end of the regeneration heating box. The detection reliability can be improved, and meanwhile the detection and regeneration efficiency is improved.

The invention relates to the technical field of synthesis ammonia, in particular to an automatic hydrogen-nitrogen ratio adjusting method for synthesis ammonia production. The method comprises the following steps of: establishing a PID (Proportion Integration Differentiation) single-loop adjusting relation between a purified gas flow meter mounted on a gas inlet pipeline of a liquid nitrogen washing cold box and an adjusting valve mounted on a PSA (Pressure Swing Adsorption) pipeline, and a ratio control loop relation between a nitrogen flow meter mounted on a medium-pressure nitrogen pipeline; the method comprises the following steps: establishing a ratio control loop relationship between a hydrogen analysis meter mounted on a synthetic gas pipeline of a liquid nitrogen washing cold box and a fine nitrogen preparation valve mounted on a medium-pressure nitrogen pipeline, and establishing a cascade loop relationship between the pressure of an inlet of a combination press mounted on the synthetic gas pipeline and the rotating speed of a steam turbine of the combination press; accurate control over the hydrogen-nitrogen ratio is achieved by adjusting the opening degree of an adjusting valve, the conveying amount of medium-pressure nitrogen, the opening degree of a fine nitrogen preparation valve and the rotating speed of a turbine of a pressing machine. The technical problems that in the prior art, the adjustment precision of manual adjustment of the hydrogen-nitrogen ratio is low, and the hydrogen-nitrogen ratio is prone to imbalance are effectively solved.

The utility model provides a kind of argon analysis system, the purpose is to solve the technical problem that argon is diluted after being used as protective gas in prior art, and traditional processing mode is difficult to make recycled gas to reach use standard again.The argon analysis system includes: main pipeline, with the analyzer cabinet body connection in argon factory area;Multiple trace oxygen analyzers, are located on the main pipeline, and are distributed along the laying path of the main pipeline;Recycling pipeline, in communication with the main pipeline;Wherein, CO analyzer, CO2 analyzer, argon nitrogen analyzer, zirconia analyzer, hydrogen analyzer are also provided on the main pipeline.Argon analysis system sets trace oxygen analyzer, CO analyzer, CO2 analyzer, argon nitrogen analyzer, zirconia analyzer and hydrogen analyzer and other instruments on the main pipeline conveying argon, analyzes the composition in argon, then makes sufficient preparation for subsequent processing, so that recycled argon can be utilized again.

The invention relates to the field of hydrogen monitoring, in particular to a long-distance pipeline failure damage prevention hydrogen concentration monitoring device which comprises a mounting pipe, a first through hole is formed in the side wall of the upper end of the mounting pipe, a connecting pipe is fixedly connected to the upper end of the first through hole, and a communicating mechanism is mounted in the connecting pipe; a plurality of communicating grooves are formed in the circumferential inner wall of the lower end of the connecting pipe at equal intervals, the lower ends of the communicating grooves communicate with the first through hole, the circumferential outer wall of the lower end of the connecting pipe is sleeved with a fixedly-connected sleeve shell, and a mounting groove is formed in the circumferential inner wall of the upper end of the connecting pipe. According to the hydrogen analyzer, the communicating mechanism is arranged on the mounting disc, the interior of the connecting pipe is communicated with the interior of the mounting pipe, it is guaranteed that a sensor of the hydrogen analyzer can make contact with air in the mounting pipe, and the hydrogen concentration is detected; the connecting pipe is sealed through the first sliding disc and the second sliding disc of the communicating mechanism, and it is guaranteed that hydrogen in the mounting pipe is difficult to leak through the connecting pipe.

The invention provides an executing mechanism for an oxygen-nitrogen-hydrogen analyzer. The executing mechanism comprises a sample injection structure, a pulse heating structure and a cleaning structure, the pulse heating structure comprises an upper furnace body and a lower furnace body, an upper electrode is arranged in the upper furnace body, a heating cavity is formed in the lower part of the upper electrode, and a first sample introduction channel communicated with the heating cavity is formed in the top of the upper electrode; a lower electrode is arranged on the lower furnace body, a crucible seat is arranged on the lower electrode, and a graphite crucible is arranged on the crucible seat; the lower furnace body is connected with a lifting cylinder which drives the lower furnace body to move; the sample introduction structure is arranged at the top of the upper furnace body to realize sealed sample introduction; the cleaning structure is arranged on one side of the pulse heating structure and automatically cleans the electrode. The sample introduction structure, the pulse heating structure and the cleaning structure are reasonably arranged, the sample introduction sliding plate of the sample introduction structure is provided with the sample introduction groove, the transparent window and the perspective sealing piece, sealed sample introduction is guaranteed, and real-time observation of the sample combustion process is achieved; and the cleaning structure realizes automatic cleaning of the electrode.

The invention belongs to the technical field of oxygen-nitrogen-hydrogen analyzers, and particularly relates to an oxygen-nitrogen-hydrogen metal instrument, a detection system and a detection method. Two lifting air cylinders, a material carrying mechanism connected with one lifting air cylinder, a rotating mechanism connected with the other lifting air cylinder, an upper electrode, a furnace end and a gas detection pipe connected with the furnace end are sequentially arranged on the side face of the shell in the vertical direction. A gas detection pipe is arranged in the furnace end, a feeding channel connected with the gas detection pipe is arranged in the furnace end, and after a sample is subjected to melting treatment, gas in the furnace end is introduced into the gas detection pipe to be detected. A rotating arm, a spraying hole located in the outer side of the rotating arm, a telescopic cleaning assembly penetrating through the spraying hole and a threaded cleaning rod connected with the top of the rotating arm are arranged at the end, away from the rotating mechanism, of the swing arm. According to the invention, attachments on the feeding channel are respectively cleaned through two cleaning modes, attached carbon black is automatically cleaned along two degrees of freedom, and the cleaning rhythm of the whole detection process can be accelerated.

The invention discloses a method for predicting the hydrogen content in steel in a vacuum refining process. The method comprises the following steps: collecting initial working condition parameters of vacuum degassing; calculating the weight and the circulating flow of molten steel in a steel ladle-vacuum chamber double-phase region; solving real-time dehydrogenation rates and dehydrogenation cumulants of three dehydrogenation paths including the interior of the molten steel, the free surface of the molten steel and the surface of the argon bubble in the unit time step length; based on a mass conservation equation, establishing a transmission equation of the hydrogen concentration in the steel ladle-vacuum chamber two-phase region steel liquid circulation process, and iteratively solving the hydrogen concentration of the steel ladle and the vacuum chamber steel liquid in unit time by utilizing a fourth-order Runge-Kutta method; and outputting the hydrogen content of the molten steel in the steel ladle and the predicted value of the real-time hydrogen content change by iterating the time step length. The method is suitable for SSRF, RH and other vacuum refining devices, the absolute error between the prediction result and the detection value of the online hydrogen meter does not exceed 0.5 ppm, and accurate data support can be provided for process optimization.

The utility model relates to the technical field of chemical production detection equipment, and discloses an air separation system total hydrocarbon analyzer working gas source supply device which comprises a nitrogen source, a nitrogen conveying pipeline, a hydrogen source, a hydrogen conveying pipeline, a compressed air source and an air conveying pipeline. The air conveying pipeline is further provided with an air conveying bypass, the combustion-supporting gas inlet is communicated with the air conveying pipeline gas outlet or the air conveying bypass gas outlet, the hydrogen conveying pipeline is further provided with a hydrogen conveying bypass, and the combustion gas inlet is communicated with the hydrogen conveying pipeline gas outlet or the hydrogen conveying bypass gas outlet. The hydrogen conveying pipeline and the hydrogen conveying bypass as well as the air conveying pipeline and the air conveying bypass are mutually main and standby, and when the gas supply amount of one path is insufficient or a fault occurs, switching can be carried out in an undisturbed mode so as to ensure that gas is continuously and stably supplied to the total hydrocarbon analyzer, and stable and safe operation of the air separation system is guaranteed.

The application provides an inner cover top atmosphere measuring device, a working method and a full-hydrogen cover type annealing furnace, and comprises a telescopic supporting rod, an inner cover, an air-lead pneumatic hose and a hydrogen analyzer; the telescopic supporting rod is installed in the inner cover; one end of the air-lead pneumatic hose extends to the inner top of the inner cover along the inner shaft of the telescopic supporting rod; the other end of the air-lead pneumatic hose extends out of the inner cover and is connected with the hydrogen analyzer. The device realizes that the detection atmosphere inlet is inserted into the inner cover top by adopting the air-lead structure design of the telescopic rod and the air-lead pneumatic hose and the method of setting the suction pump at the end, and skillfully solves the difficulty of leading out the top atmosphere of the inner cover with high vertical height and difficult vertical hoisting of the inner cover with temperature.

The present invention provides a method of analyzing residual lithium compounds in an anode active material for a lithium secondary battery, the analysis method comprising the steps of: analyzing a sample of an anode active material to determine the amount of H component using an oxygen / nitrogen / hydrogen analyzer (ONH analyzer) and a Karl Fischer analyzer; analyzing the sample to determine the amounts of C component and S component using a carbon / sulfur analyzer (CS analyzer); analyzing the sample to determine the amount of Li component using an inductively coupled plasma optical emission spectrometer (ICP-OES); and calculating the amounts of each of LiOH, Li2CO3, and Li2SO4 in the sample using the quantitative results of the H, C, and S components, and calculating the amount of Li2O in the sample using the quantitative result of the Li component. According to the analysis method of the present invention, the amounts of all four residual lithium compounds LiOH, Li2CO3, Li2SO4, and Li2O present in the anode active material can be analyzed.

The utility model provides an embedded furnace end of an oxygen-nitrogen-hydrogen analyzer, which relates to the technical field of oxygen-nitrogen-hydrogen analyzers, and comprises an oxygen-nitrogen-hydrogen analyzer body, a placing table is arranged on one side of the oxygen-nitrogen-hydrogen analyzer body, a mounting box is arranged at the top of the placing table, a mounting component is arranged in the mounting box, and the oxygen-nitrogen-hydrogen analyzer body is arranged in the mounting component. An embedded furnace end is installed on the installation assembly, and a protection assembly is arranged on the outer side of the embedded furnace end. The device solves the problems that an embedded furnace end of an existing oxygen-nitrogen-hydrogen analyzer is aged after being used for a long time, and meanwhile, the embedded furnace end cannot be protected after being used, so that subsequent use of a worker is influenced, and inconvenience is caused.

The utility model discloses a system for inhibiting reverse current of electrolyzed water, which comprises an electrolytic bath, an alkali liquor circulating pump, an oxygen-in-hydrogen analyzer and a nitrogen charging part, one side of the alkali liquor circulating pump is connected with the electrolytic bath, the other side of the alkali liquor circulating pump is connected with the nitrogen charging part, and the oxygen-in-hydrogen analyzer is connected with the electrolytic bath. According to the system for inhibiting the reverse current of the electrolyzed water, the current inhibiting component is additionally arranged on the electrolytic bath, and different types of valves are arranged for protection, so that the stability and the working efficiency of the system are improved.

The utility model provides a sample introduction structure for an oxygen-nitrogen-hydrogen analyzer, which comprises a sample introduction main body, a second sample introduction channel is vertically arranged in the sample introduction main body in a penetrating manner, a sample introduction rod is arranged in the sample introduction main body, the sample introduction rod is connected with a first push rod cylinder, and the first push rod cylinder drives the sample introduction rod to enter or exit from the second sample introduction channel; the sample introduction main body is provided with an inert carrier gas conveying pipe communicated with the second sample introduction channel; the sample introduction sliding plate is arranged above the sample introduction main body, a funnel-shaped sample introduction groove is formed in the front part of the sample introduction sliding plate, a transparent window is arranged at the rear part of the sample introduction sliding plate, and a perspective sealing element is arranged at the transparent window; the sample introduction sliding plate is connected with a second push rod cylinder, the second push rod cylinder drives the sample introduction sliding plate to move back and forth and switch between a sample introduction position and an observation position, and when the sample introduction sliding plate is located at the sample introduction position, the sample introduction groove is communicated with the second sample introduction channel; when the sample introduction sliding plate is located at the observation position, the perspective sealing piece is located right above the second sample introduction channel.

The invention relates to a PEM hydrogen production device BOP system instrument centralized acceptance inspection and detection platform system and a PEM hydrogen production device BOP system instrument centralized acceptance inspection and detection method. The pressure supply unit comprises a gas pipeline, a pure hydrogen cylinder, a pure oxygen cylinder, a hydrogen pressure reducer and an oxygen pressure reducer, the hydrogen pressure reducer and the oxygen pressure reducer are correspondingly communicated with the pure hydrogen cylinder and the pure oxygen cylinder, and the gas pipeline is connected with the hydrogen pressure reducer and the oxygen pressure reducer; the oxygen buffer tank is provided with a plurality of groups of interfaces used for installing a plug-in water level gauge, a pressure detection instrument, a side-mounted liquid level meter and a temperature detection instrument, and an electric heater is arranged in the oxygen buffer tank; the water circulating unit comprises a circulating water pipeline circularly communicated with the oxygen buffer tank and a variable-frequency water pump, and the circulating water pipeline is provided with a plurality of groups of interfaces for mounting a conductivity detection instrument and a flow detection instrument; and the gas analysis unit comprises a hydrogen-in-oxygen analyzer, a trace oxygen analyzer and a dew point analyzer. The acceptance efficiency is improved, and the project risk and cost are reduced.