76 results about "Oxygen system" patented technology

The invention discloses preparation of a phenanthroline-based covalent organic framework photocatalyst and application of the phenanthroline-based covalent organic framework photocatalyst in photocatalytic production of hydrogen peroxide. According to the method, a hydrogen peroxide production experiment is carried out in a water-oxygen system or a benzyl alcohol-water-oxygen system by taking phenanthroline-based COF as a photocatalyst. According to the invention, through regulation and control of molecular flatness engineering, an electron-rich phenanthroline unit (Phen) anchored by a pyridine expansion plane and electron-deficient triazine (TTA) are integrated into a COF skeleton, and a novel electron donor-acceptor (D-A) type COF is synthesized. The COF has the advantages of proper energy band structure, excellent photo-induced electron and hole separation efficiency, strong D-A interaction, good hydrophilicity and the like, and the efficiency of photocatalytic hydrogen peroxide production reaction within a short time is greatly improved. The invention provides a use method of the COF photocatalyst which is cheap, convenient, rapid, efficient and environment-friendly, and has a potential application prospect.

The utility model discloses a vehicle-mounted oxygen generator, a vehicle-mounted oxygen generation system and a vehicle, and relates to the technical field of vehicle-mounted equipment. The vehicle-mounted oxygen generator comprises an installation support, an air inlet filter, an air compressor, a heat dissipation assembly, an electromagnetic valve set and a molecular sieve assembly, the air inlet filter, the air compressor, the heat dissipation assembly, the electromagnetic valve set and the molecular sieve assembly are arranged on the installation support and connected in sequence, and the vehicle-mounted oxygen generator achieves integrated and modular design and is easy to install in a vehicle. The molecular sieve assembly comprises at least two molecular sieve towers for adsorbing nitrogen and discharging oxygen, and the electromagnetic valve group can switch air intake and nitrogen discharge of the molecular sieve assembly, so that compressed air enters the specified molecular sieve towers, and the specified molecular sieve towers discharge nitrogen, so that continuous oxygen production and nitrogen discharge can be realized, and the device has the advantage of high efficiency; the vehicle-mounted oxygen generator can be remotely controlled through a remote control switch, and is convenient to operate; by providing oxygen into the vehicle, the breathing smoothness of a driver and passengers can be guaranteed, and the driving experience is improved.

The invention belongs to the technical field of flow fine adjustment control of an aircraft oxygen system, and relates to a flow control device which comprises a shell which is a barrel with two open ends, a partition plate is arranged in the middle to divide the interior of the shell into an upper cavity and a lower cavity, an air inlet is formed in the upper cavity, an air outlet is formed in the lower cavity, and a center through hole is formed in the center of the partition plate; the partition plate is provided with a plurality of main air holes around the central through hole; the lower cover plate seals the lower end opening of the shell, and the upper end face of the lower cover plate is provided with a short cylinder; the lower end of the spring sleeves the short cylinder; a lower-end column body sleeves the upper end of the spring, and an upper-end ball head seals the lower end face of the central through hole under the action of the spring; the upper cover seals the upper end opening of the shell; the lower-end valve plate is arranged above the partition plate, covers the main air hole and is provided with an air channel for communicating the side wall of the valve plate with the center of the lower end surface of the valve plate, so that the upper cavity is communicated with the central through hole when the push rod valve falls down; the upper end push rod penetrates through the upper cover.

A rescue vest for deepwater operators comprises a first partition and a second partition which are located in front of the left chest and the right chest respectively, a third partition located on the abdomen, a fourth partition surrounding the neck, a fifth partition located on the back shoulder, and a sixth partition and a seventh partition which are located on the side chest and the abdomen respectively, and each partition is internally provided with a heat production and oxygen production unit; the heat and oxygen production unit comprises a closed cavity, a first reaction cavity and a second reaction cavity are arranged in the closed cavity, and inner cavities of the first reaction cavity and the second reaction cavity are sealed by isolation films; and a vacuum reaction cavity is arranged in the closed cavity outside the first reaction cavity and the second reaction cavity. The device can simultaneously play roles of heat preservation, oxygen supply, floating and the like, and the generated gas is only oxygen, so that the device plays a huge role in closed environment and underwater operation, and solves the problem of lifesaving of deepwater operating personnel under the condition that the deepwater parking temperature of a submersible and an oxygen system disappear.

The utility model relates to the technical field of water environment treatment, and discloses a microbiological treatment device for water environment treatment, which comprises a reaction tank, a sedimentation tank and a filter tank, the reaction tank, the sedimentation tank and the filter tank are sequentially arranged, a second water pump is arranged between the reaction tank and the sedimentation tank, a pipeline is arranged between the sedimentation tank and the filter tank, and the water pump is connected with the pipeline. A first water pump is arranged on the outer side of the reaction tank, the input end of the first water pump is connected to the interior of the reaction tank through a pipeline, a ventilation assembly is arranged on the bottom side of the interior of the reaction tank, an ultrasonic vibration assembly is installed at the top of the reaction tank, and a filtering assembly is arranged in the filtering tank. According to the utility model, the water treatment efficiency is remarkably improved by combining the oxygen dissolving system, the ventilation assembly, ultrasonic vibration and multiple filtering technologies; meanwhile, the filter assembly is easy to clean and replace due to the design of the sliding grooves and the activated carbon filter plates, the service life of filter materials is prolonged, and maintenance cost is reduced.

The invention belongs to the technical field of wet oxygen processes, and discloses a wet oxygen system water changing method, a wet oxygen system and oxidation diffusion equipment. The water changing method for the wet oxygen system comprises the steps that the water passing set time length and the water changing set time length are set, if the water passing set time length is not smaller than the water changing set time length, starting of the water changing process is paused, first reminding information is reported, and the first reminding information can remind a user to change the water passing set time length and the water changing set time length; water quality detection is conducted in the water passing process, a water quality detection result is obtained after water passing is conducted for a set time length, if the water quality detection result meets the water quality requirement, the wet oxygen system is controlled to continue to conduct the water changing process, and otherwise, the water changing process is suspended; in the water changing process, if the actual water changing duration exceeds the water changing set duration, the water changing process is stopped, second reminding information is reported, and the second reminding information can remind the user to check the wet oxygen system. The water changing method of the wet oxygen system can ensure reasonable water quality detection and water changing, and further ensures the water changing process.

The invention relates to an electrolyzer (1) with a stack (2), an oxygen gas system (8) fluidly connected to anode-side areas, a hydrogen gas system (9) fluidly connected to cathode-side areas, an oxygen reservoir (14), a first oxygen connecting line (16) fluidly connecting the oxygen gas system (8) to the oxygen reservoir (14), an oxygen-side shut-off device (10) arranged in the first oxygen connecting line (16) and having a closed and an open state, a hydrogen reservoir (15), a first hydrogen connecting line (17) fluidly connecting the hydrogen gas system (9) to the hydrogen reservoir (15), a hydrogen-side shut-off device (11) arranged in the first hydrogen connecting line (17) and having a closed and an open state, and a control unit (3) configured toupon exceeding a threshold value of a differential pressure between an anode-side gas and a cathode-side gas, the oxygen-side shut-off device (10) and the hydrogen-side shut-off device (11) are simultaneously moved from the closed state to the open state.

The utility model discloses a bonding tool for assembling a valve core of an oxygen supply system, which comprises a bottom plate, a pressing plate and a pressurizing seat, a plurality of positioning columns are arranged on the bottom plate, a bottom plate groove is arranged in the middle of the upper surface of the bottom plate, the pressing plate is positioned above the bottom plate, a plurality of pressing plate positioning through holes and a pressing plate middle through hole are arranged on the pressing plate, and the pressing plate positioning through holes are communicated with the pressing plate middle through hole. The lower face of the pressurizing base is a plane and located above the pressing plate, a plurality of pressurizing base positioning holes are formed in the lower portion of the pressurizing base, a pressurizing base middle through hole is formed in the middle of the pressurizing base, and the upper ends of the positioning columns penetrate through the pressing plate positioning through holes in one-to-one correspondence from bottom to top and then are arranged in the pressurizing base positioning holes. And the central lines of the pressing plate middle through hole and the pressurizing seat middle through hole coincide and penetrate through the central position of the bottom plate groove. According to the utility model, the function of uniformly pressurizing the sealing gasket on the valve rod through the gravity of the pressurizing seat and the positioning function of the pressing plate is realized, and high-quality pressurizing, bonding and assembling between the sealing gasket and the valve rod can be realized.

The invention provides a safety isolation device, a coal water slurry entrained-flow bed gasifier, an oxygen introduction control method and an oxygen removal control method, and relates to the technical field of gasifiers. The safety isolation device comprises a first connecting pipeline and an oxygen emptying branch, one end of the first connecting pipeline is used for being connected with an oxygen supply system, and the other end of the first connecting pipeline is used for being connected with an oxygen removal system; the other end is connected with an oxygen system; and a second stop valve and a first stop valve are sequentially arranged in the conveying direction of the first connecting pipeline. According to the safety isolation device, the second stop valve is arranged in front of the first stop valve used for communicating the multi-nozzle opposed coal water slurry entrained-flow bed gasifier oxygen system and the oxygen public pipe network, and the first oxygen emptying valve is additionally arranged between the first stop valve and the second stop valve; in the maintenance period of the gasification furnace, the first stop valve and the second stop valve are closed, and the first oxygen emptying valve is opened, so that oxygen in the oxygen public pipe network can be prevented from entering an oxygen system of the gasification furnace, and safety accidents are avoided.

The invention relates to an electrolyser (1) having a stack (2), an oxygen gas system (8) which is fluidically connected to anode-side regions, a hydrogen gas system (9) which is fluidically connected to cathode-side regions, an oxygen reservoir (14), a first oxygen connection conduit (16) which fluidically connects the oxygen gas system (8) to the oxygen reservoir (14), an oxygen-side shut-off element (10) which is disposed in the first oxygen connection conduit (16) and has a closed state and an open state, a hydrogen reservoir (15), a first hydrogen connection conduit (17) which fluidically connects the hydrogen gas system (9) to the hydrogen reservoir (15), a hydrogen-side shut-off element (11) which is disposed in the first hydrogen connection conduit (17) and has a closed state and an open state, and a control device (3) which is designed to bring the oxygen-side shut-off element (10) and the hydrogen-side shut-off element (11) simultaneously from the closed state to the open state on exceedance of a threshold value of a pressure differential between an anode-side gas and a cathode-side gas.

The invention relates to a single mixing and single sintering process for manufacturing gallium and zinc doped lithium lanthanum zirconium oxide. The process comprises the following steps: mixing lithium carbonate powder, lanthanum oxide powder, zirconium dioxide powder, gallium oxide powder and zinc oxide powder in an emulsifying machine; then putting the mixed powder into a wet grinding machine for grinding to obtain a plurality of mixture powder; placing the plurality of mixture powders in an oven for drying, and placing the mixture powders in a grinding bowl for grinding to form fine powders; then the fine powder is placed in a sintering furnace to be sintered through two-stage gas injection, in the first stage, the sintering temperature is increased to 800-900 DEG C from the room temperature, and oxygen-enriched gas is injected into the sintering furnace; in the second stage, the originally injected dilute oxygen gas is replaced with pure oxygen to be injected into the sintering furnace, the sintering procedure is completed in the environment of 800-900 DEG C to obtain the gallium and zinc doped lithium lanthanum zirconium oxide, and the dilute oxygen system refers to that the proportion of oxygen in the whole gas is smaller than 30%.

1. The name of the design product: four-cylinder compressor (2). 2. The use of the design product: used in oxygen generator oxygen system, through the alternating work of multiple cylinders, to provide stable pressure for the raw material air of adsorption tower. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The invention discloses a closed type efficient heat dissipation air source assembly for an airborne oxygen system, and belongs to the technical field of production of airborne oxygen systems, the closed type efficient heat dissipation air source assembly comprises a compressor, a controller, a heat dissipation fan, a closed shell, an air inlet pipe, a flow guide support, a flow guide plate and an air outlet pipe, the air source bottom plate is installed on the installation bottom plate, the lower end of the closed shell is connected with the air source bottom plate in a sealed mode, the compressor, the controller, the flow guide support and the flow guide plate are all arranged in the closed shell, the air inlet pipe is installed on the upper portion of the side wall of the closed shell and close to the position above the compressor, and the upper end of the air outlet pipe is installed on the installation bottom plate. The cooling fan is installed on the flow guide support, an air inlet of the cooling fan is communicated with the inner end of the air inlet pipe, and the flow guide plate is located between the cooling fan and the controller and forms three air channels in the closed shell. Omnibearing, continuous and efficient heat dissipation of the compressor and the controller can be achieved, and guarantee is provided for stable and reliable work of the compressor and the controller.

The present invention discloses a method for improving the service life of a supercharged turbine in a mechanical oxygen system, as well as a turbine axial force testing device and method. The turbine axial force testing device includes a shaft, bearings, bushings, bearing housings, sealing bushings, impellers, intermediate housings, volutes, and a data acquisition instrument, strain conditioner, stress ring, press, etc. required for axial force testing. During the axial force test, the force-strain relationship and temperature-strain relationship of the stress ring are tested separately. When the test result error is within a set range, the axial force value is determined by combining the strain value in the temperature-strain relationship with the force-strain relationship. The present invention determines the key factors that affect the service life of the supercharged turbine, and at the same time realizes the axial force test of the supercharged turbine in the mechanical oxygen system, providing a reliable and powerful basis for the axial force balance design of the supercharged turbine to ensure the operating life of the supercharged turbine.

The invention belongs to the technical field of metal surface strengthening, and discloses a method for realizing matrix interface strengthening in a lead-bismuth environment, which comprises the following steps: firstly, carrying out ultrasonic cleaning on a target sample to ensure that the surface is free of stains; then clamping the target sample in a sealed cavity of fatigue loading equipment, and heating the solid lead bismuth to completely melt the solid lead bismuth and submerge the target sample; after the PLC oxygen control system is connected, reducing gas is continuously introduced into the sealed cavity; after the temperature of the heating furnace is increased, reducing gas is adopted for gas washing; after the temperature of the heating furnace continues to rise and oxygen reduction treatment is carried out, the introduction amount of reducing gas is reduced, and PLC automatic control is carried out; and finally, carrying out low-stress pulsation cyclic load loading on the target sample in a stress control mode. The stable oxidation layer and matrix interface is prepared in the liquid lead bismuth environment under the cyclic stress effect, the method has the characteristics of stability, durability, dynamic repairability and the like, and a powerful guarantee is provided for long-term safety service of the fourth generation LFR.

The utility model belongs to the technical field of industrial heating furnaces, and relates to an intelligent heating system based on carbon circulation, which comprises a coal gas system, a carbon circulation system, an oxygen system, a flue gas system, a heating furnace body and a heating section heat supply system, the coal gas system comprises a coal gas cold conveying pipeline and a coal gas hot conveying pipeline; the carbon circulating system comprises a first flue gas adjusting stop valve, a circulating flue gas cold conveying pipeline and a circulating flue gas hot conveying pipeline; the oxygen system comprises an oxygen conveying pipeline; the flue gas system comprises a flue gas waste heat recovery flue, a second flue gas adjusting stop valve and a chimney; at least one heating section heat supply system is arranged in the heating furnace body, and a smoke outlet of the heating furnace body is connected with an inlet of the smoke waste heat recovery flue; an outlet of the flue gas waste heat recovery flue is further connected with a first flue gas adjusting stop valve, an outlet of the oxygen conveying pipeline is connected to the circulating flue gas cold conveying pipeline so as to be mixed with circulating flue gas, and the circulating flue gas hot conveying pipeline and the coal gas hot conveying pipeline are both connected to a heat supply system.

The invention provides a test system for hydrogen-oxygen composite reaction. The test system comprises a closed reaction container, and a hydrogen generator, an oxygen bottle and an argon bottle which are respectively in gas connection with the closed reaction container through gas pipelines, gas flow controllers are arranged on a pipeline for connecting the closed reaction container with the hydrogen generator and a pipeline for connecting the closed reaction container with the oxygen bottle; a thermocouple and a hydrogen component transmitter are arranged in the closed reaction container. According to the experimental system, experimental research of a non-premixed hydrogen-oxygen system can be carried out, the gas inlet speed can be accurately controlled, catalytic composite reaction under different gas inlet speeds and different hydrogen-oxygen volume conditions can be researched, the arrangement position of the catalyst layer can be changed, and the influence of the arrangement of the catalyst layer on hydrogen-oxygen catalytic reaction can be explored.

The utility model provides a deep well ultra-nano gas dissolution reoxygenation system. The deep well ultra-nano gas dissolution reoxygenation system comprises a low-temperature storage tank for storing liquid oxygen, a vaporizer, an ultra-nano gas dissolution reoxygenation device arranged at the bottom of a deep well, a water outlet pump arranged in the deep well, a filtering system arranged in a natural water body and a water inlet pipe connected with the filtering system and the ultra-nano gas dissolution reoxygenation device. A water outlet pipe extending into the natural water body is arranged at the output end of the water outlet pump. And the output end of the vaporizer is communicated with the ultra-nano gas dissolution and reoxygenation device. Natural water is filtered by the filtering system and then flows into the ultra-nano gas dissolving and reoxygenation device through the water inlet pipe, the natural water is mixed with oxygen vaporized by the vaporizer to form oxygen-enriched water, and the oxygen-enriched water flows out of a gas dissolving outlet of the ultra-nano gas dissolving and reoxygenation device and then is pumped to an oxygen deficit point in the natural water through the water outlet pump. Through the arrangement, the system improves the utilization rate of oxygen and reduces the pressurization energy consumption under the same working pressure by utilizing the natural pressure at the bottom of the deep well, and more than 60% of electric energy is saved under the same working pressure.

The application discloses a kind of mechanism oxygen system supercharged turbine life running test test device and method, device includes turbine side import air pipeline, turbine side export air pipeline, compressor side import air pipeline and compressor side export air pipeline.The present application provides compressed air by low pressure gas source, adjusts electric valve to import air to turbine and compressor side simultaneously, after entering heater heating after air filter core, then again by bypass valve import pressure, after import air pressure and temperature reach set value, make the air of specified pressure and temperature enter mechanism oxygen system supercharged turbine.Then start vacuum pump, adjust solenoid valve opening, make turbine and compressor export pressure reach required value, finally carry out life running test according to specified parameter.The present application realizes life running test simulation real working condition, and collects and records each test parameter, so that mechanism oxygen system supercharged turbine carries out life running test according to actual working condition.

The invention discloses a self-weight balancing device and a VSPA oxygen generation system switching valve with the self-weight balancing device, and the self-weight balancing device comprises a supporting block and a top ball; a jacking cavity is formed in the bottom end of an inner cavity of the valve body and right faces the bottom of the valve rod. The supporting block is embedded in the bottom end of the jacking cavity. A containing groove is formed in the top of the supporting block, the top ball is arranged in the containing groove, and the top of the top ball protrudes out of the containing groove and abuts against the bottom end of the valve rod. According to the self-weight balancing device, the valve element assembly applies balance force which is equal to the self weight in magnitude and opposite to the self weight in direction, so that the valve element assembly is in a suspension state with the net weight being zero in the whole movement process; unilateral eccentric wear to the guide sleeve caused by the dead weight of the valve core and additional impact and stress to a sealing pair are eliminated, the wear rate of key parts of the valve is effectively reduced, the service life of the valve under the high-frequency switching working condition is remarkably prolonged, and the reliability of the valve under the high-frequency switching working condition is remarkably improved.

The present application is a tower type diaphragmless reversible fuel cell, which is a kind of automatic equipment integrating power generation and hydrogen production, and is capable of efficiently and high-power converting hydrogen and oxygen into electric energy through electrochemical reaction, and efficiently and high-power electrolyzing water through an external power source (such as photovoltaic power, wind power, etc.) to separate and store high-purity hydrogen and oxygen for delivery. The tower type diaphragmless reversible fuel cell is composed of a reaction tank (9-2) fixed on a base (9-1), a hydrogen buffer bottle (9-5), a compressor (9-17), a parallel high-pressure hydrogen storage bottle (9-21), a hydrogen system and an oxygen system, and a parallel hydrogen supply assembly (7-8) and a parallel oxygen supply assembly (7-11) in a parallel gas supply assembly fixed on the back of the reaction tank (9-2).

The utility model discloses a kind of closed high-efficiency heat dissipation air source components for airborne oxygen system, belong to the production technical field of airborne oxygen system, including compressor, controller, heat dissipation fan, closed shell, air inlet pipe, flow guide support, guide vane and air outlet pipe, compressor and controller are respectively installed on air source bottom plate, air source bottom plate is installed on mounting bottom plate, the lower end of closed shell is sealedly connected with air source bottom plate, compressor, controller, flow guide support and guide vane are all placed in closed shell, air inlet pipe is installed on the upper portion of the lateral wall of closed shell and close to the top of compressor, the upper end of air outlet pipe is installed on mounting bottom plate, heat dissipation fan is installed on flow guide support and its air inlet is connected with the inner end of air inlet pipe, guide vane is located between heat dissipation fan and controller and forms three air ducts in closed shell.The utility model can realize all-around sustained high-efficiency heat dissipation for compressor and controller, provide guarantee for its stable and reliable work.

The utility model belongs to the aviation oxygen production technology, and relates to an oxygen supply device, which comprises a compressor, a light-emitting diode (LED) indicating lamp, an oxygen partial pressure sensor, a pressure sensor, a flow sensor and a control function for starting and stopping the compressor. According to the utility model, the solenoid valve is used for controlling the on-off of the gas circuit, the oxygen partial pressure sensor and the pressure sensor are used for measuring the oxygen concentration in the flight environment, and the controller processes feedback signals of the sensors and judges whether to start the compressor for oxygen production. The oxygen supply flow is measured through the flow sensor, and the controller processes feedback signals of the sensor and judges whether the oxygen production power of the compressor is adjusted or not. The portable oxygen supply device solves the problem of insufficient plateau oxygen supply, further supplements the oxygen supply capacity of the oxygen system, improves the reliability of the plateau aircraft oxygen system, and improves the flight safety of the aircraft.

The present invention relates to the technical field of oxygen production, and discloses an oxygen production device based on the silver dissolved oxygen mechanism, comprising a silver smelting and dissolving oxygen system, an ultrasonic vacuum deoxidation device, a vacuum suction system, a cooling system, an electromagnetic stirring system, and an oxygen storage tank; the silver smelting and dissolving oxygen system comprises a silver smelting induction furnace, the interior of the silver smelting induction furnace being divided into an oxygen dissolving chamber and a deoxidation chamber, the oxygen dissolving chamber and the deoxidation chamber being connected via an opening. The oxygen production device of the present invention utilizes a liquid silver dissolving and releasing oxygen method to produce oxygen, that is, utilizing the property of liquid Ag selectively dissolving and releasing oxygen in the air to separate and extract oxygen from the air, the produced oxygen has high purity, and almost no Ag is lost during the oxygen production process. The cyclic oxygen dissolving and deoxidation process is achieved by the electromagnetic stirring device and the vacuum-ultrasonic deoxidation device, and the oxygen production efficiency is high. During the oxygen production process, the silver induction smelting furnace stabilizes the oxygen production temperature near the melting point of silver (970°C), thereby achieving the purpose of green and efficient oxygen production.

An oxygen system for an aircraft may have a chemical oxygen generator; an oxygen mask; and a tube assembly extending from the chemical oxygen generator to the oxygen mask. The tube assembly may have a first tube and a second tube. The first tube defines a fluid conduit that fluidly couples the chemical oxygen generator to the oxygen mask in response to being in use. The second tube may be configured to house a plurality of lights therein.

An oxygen mask for use in an aircraft includes a base, the base having an oxygen port for an inflow of oxygen from an oxygen source; a face piece, protruding from a peripheral portion of the base and surrounding a breathing space; a re-directing portion, spaced from the base and arranged over the oxygen port within the breathing space; and at least one lateral opening between the base and the re-directing portion, the at least one lateral opening providing a fluid connection between the oxygen port and the breathing space.

The present invention provides a method for producing high-purity argon from air using a three-stage process. Using air as the raw material, a first-stage pressure swing adsorption unit, a second-stage pressure swing adsorption unit, and a third-stage catalytic deoxygenation unit are operated in series. The first-stage pressure swing adsorption unit includes a first-stage adsorption tower for removing oxygen, carbon dioxide, and water to produce an intermediate gas rich in nitrogen and argon. The second-stage pressure swing adsorption unit includes a second-stage adsorption tower for further removing nitrogen to produce an argon-rich gas that also contains trace amounts of oxygen. The third-stage catalytic deoxygenation unit includes an oxygen removal system and a carbon dioxide removal system. The oxygen removal system uses carbon combustion to remove trace oxygen from the argon-rich gas to produce carbon dioxide. The carbon dioxide removal system further removes carbon dioxide to produce high-purity argon. The present invention utilizes a non-cryogenic process, enabling the production of argon at any time, making argon acquisition more convenient and efficient.

Processes are provided for the production of humic acids from coal such as lignite, involving mixing comminuted coal solids with an aqueous alkaline solution under subcritical extraction conditions, which comprise an extraction temperature of from 25 to 50° C.; an extraction pressure of from >0.1 MPa to <0.5 MPa; a flow of an oxygen containing gas; and potassium hydroxide.

The invention discloses a dynamic self-regulation oxygen production and supply system for mining mechanical equipment in a high altitude area. The dynamic self-regulation oxygen production and supply system comprises a dirty air purification circulation system, an oxygen supply system, a fresh air mixing system and an environment detection and precise oxygen supply system, the dirty air purification circulation system performs two-stage purification treatment on operation dirty air through wet cyclone and dry filtration; the oxygen supply system is pressurized through an air compressor with air pressure compensation, and oxygen-enriched air is prepared by adopting a pressure swing adsorption principle; the fresh air mixing system is used for uniformly mixing the purified circulating air with the oxygen-enriched air; the environment detection and precise oxygen supply system drives a jet device to realize fixed-point oxygen supply by monitoring oxygen concentration in real time and positioning personnel. Through intelligent cooperation of multiple modules, the technical bottlenecks that oxygen carrying is difficult in the high-altitude low-pressure environment, traditional ventilation is high in energy consumption, and the oxygen utilization rate is low are overcome, efficient cyclic utilization of oxygen, accurate supply according to needs and system energy consumption optimization are achieved, and the safety of high-altitude mine excavation operation and the working efficiency of personnel are remarkably improved.