33 results about "Oxygen decrease" patented technology

The present invention is an improvement in the preparation of liquid hydrocarbons from natural gas / methane, oxygen and / or steam. In particular, the present invention relates to processes for the production of synthesis gas, reducing the oxygen concentration from the synthesis gas, and the production of liquid hydrocarbons using the oxygen reduced synthesis gas as a feedstock. More particularly, the present invention described herein identifies catalyst compositions, apparatus and methods of using such catalysts and apparatus for preparing liquid hydrocarbons via oxygen reduced synthesis gas all in accordance with the present invention.

The invention provides a tobacco leaf modified-atmosphere curing method and belongs to the technical field of sealed tobacco leaf storage. Tobacco leaves are sealed in a film cover, and the film covercomprises a sucking hole and a vent valve. Negative pressure is formed by sucking air from the film cover through the sucking hole, and the sucking hole is sealed to obtain the sealed film cover. Thesealed film cover is filled with nitrogen through the vent valve until the concentration of oxygen in the sealed fil cover is 2% or below, and the vent valve is turned off. An atmosphere modifying agent is put in the sealed film cover to complete modified-atmosphere tobacco leaf curing. Nitrogen-filled atmosphere modification and atmosphere modification by utilizing the atmosphere modifying agentare organically integrated to form a comprehensive atmosphere modification technology integrating nitrogen-filled quick oxygen decrease and atmosphere modifying agent added long-acting oxygen-consuming humidity control, and the problem is avoided that the modifying agent added atmosphere modifying agent in the prior art is difficult to control in humidity and likely mildews.

The invention relates to a plant for reducing the oxygen content in the atmosphere of an enclosed space and / or for maintaining a reduced oxygen content in the atmosphere of an enclosed space, below apreset operating concentration that is reduced in comparison to the oxygen concentration in normal ambient air. To that end, the plant has a gas separation system whose outlet is fluidically connectedto the enclosed space for the continuous supply of an oxygen-reduced gas mixture or oxygen-displacing gas. The gas separation system is configured such that, during continuous operation of the gas separation system, the oxygen concentration in the atmosphere of the enclosed space is always in a range between the preset operating concentration and a preset or settable lower limit concentration.

The invention belongs to the technical field of warehousing of traditional Chinese medicinal materials and particularly relates to a traditional Chinese medicinal material maintenance method adoptingnitrogen storage. Traditional Chinese medicinal materials are sealed by a gas-tight silo to be isolated from outside natural gas environment, nitrogen is injected into the gas-tight silo by movable pressure swing adsorption separation type nitrogen generating equipment, and an automatic pumping and filling linkage system which is arranged outside is in charge of discharging replaced gas outwards from the gas-tight silo. The method has the main advantages as follows: oxygen decreasing speed is high, insect pests can be eliminated within short time, and loss caused by the insect pests for the traditional Chinese medicinal materials can be reduced; the preservation effect is realized through continuous low-oxygen storage, phenomena such as autoxidation, weathering, color change and bleeding of the traditional Chinese medicinal materials can be relieved sufficiently, and accordingly, the storage period of the traditional Chinese medicinal materials is prolonged.

The invention discloses a bioreactor. The structure of the bioreactor comprises a base frame, a reaction tank, a heat exchange plate, a tank cover, a driving box, a feeding port and a gas-increasing mixing structure. The reaction tank is vertically installed on the upper end of the base frame, the heat exchange plate is embedded and installed in the inner side of the reaction tank, the tank coveris horizontally installed on the upper end of the reaction tank, the driving box penetrates the upper end of the tank cover, the feeding port is installed on the outer side of the tank cover, the gas-increasing mixing structure comprises a main shaft, a gas-intake structure, a communication pipe, a rotating rod and a mixing structure, the main shaft is vertically installed at the upper end of thegas-intake structure, the communication pipe is installed at the lower end of the gas-intake structure, the rotating rod is mechanically connected to the lower end of the communication pipe, and the mixing structure is installed at the lower end of the rotating rod. According to the present invention, the lower end of the driving box is provided with the gas-increasing mixing structure, which helps the diffusion of oxygen, so that organisms obtain oxygen better, and the death of organisms caused by hypoxia is reduced; and the lower end of the communication pipe is provided with a gas-mixing structure, so that oxygen in the culture medium is more widely distributed, the biological reaction is better carried out, and the reaction yield is improved.

The invention discloses a pre-embedded oxygen-free packaging detection method for an integrated circuit board, belongs to the technical field of circuit packaging, and can realize innovative embeddingof a pre-embedded detection rod in the packaging process of the integrated circuit board; therefore, on the one hand, leads can be conveniently led out of a packaging body from the integrated circuitboard; on the other hand, oxygen detection can be carried out in the encapsulation body in a water supply triggering mode after encapsulation is finished, oxygen is consumed while the oxygen is detected in a first communication and air suction mode, then stable carbon dioxide gas is released, residual oxygen can be expelled, residual oxygen is reduced, and the residual oxygen is pre-stored in theencapsulation body, so even if air leakage occurs in the later period, external air can be prevented from entering by utilizing the filling property of carbon dioxide, so certain time is provided foroverhauling of technicians, and the packaging quality of the integrated circuit board is improved.

The invention relates to an inert gas protection method during combustion of an explosion-proof lithium battery power supply, and belongs to the technical field of mining lithium batteries. According to the technical scheme, when a battery pack (10) burns and explodes, the battery pack is sealed in full inert gas (9) and is in an oxygen isolation state, so that the explosion intensity of the battery pack is reduced, eliminated or weakened; the sealing liquid cools flames formed by combustion and explosion of the battery pack while sealing inert gas leakage. The inert gas protection method has the beneficial effects that underground coal mine safety application is guaranteed, when the lithium battery is on fire and explodes, inert gas is used for isolating oxygen, the explosion intensity of the battery pack is reduced, eliminated or weakened, the sealing liquid and the fire barrier (fire barrier grid) cool down and extinguish combustion flame of the battery, external explosive explosion is not caused or induced, and the special requirements of mining explosion-proof equipment are met; the method has great significance in application of high-capacity lithium batteries in underground coal mines and explosion places.

The present invention relates to the technical field of bio-based material technology research and development, and discloses an automatic oxygen introduction type auxiliary fermentation mechanism for bio-based material research, the automatic oxygen introduction type auxiliary fermentation mechanism comprises a detection mechanism for monitoring the oxygen amount, and the detection mechanism comprises a side pipe; the oxygen in a fermentation box and the side pipe is reduced, so that the piston moves in the side pipe, the number of resistance coils connected into a circuit is reduced, an electromagnet electrically connected with the resistance coils is electrified to generate magnetism, the monitoring effect of the oxygen amount is achieved, and after the oxygen consumption required by fermentation reaches the maximum value, the follow-up oxygen supplementation operation is automatically triggered; the electromagnet attracts a metal block and a connecting frame to move downwards, so that two moving rods are far away from each other, a gear and a pressing plate are driven to rotate, a pipe body of a ventilation pipe is not extruded any more, oxygen in the ventilation pipe smoothly circulates, control over oxygen supplementation operation is achieved, and oxygen is automatically introduced into the fermentation tank under the condition that oxygen in the fermentation tank is insufficient; and the fermentation operation can be smoothly carried out, manual oxygen introduction is avoided, and the practicability is higher.

The invention discloses a method of firing low-cobalt fine-grain hard alloy by a common sintering furnace. The method comprises the steps of adding a low-cobalt fine-grain hard alloy blank in the sintering furnace, and introducing an inertial gas to carry out dewaxing; after dewaxing, sintering at a sintering temperature 10-20 DEG C less than eutectic point temperature by keeping the inertial gasunder micro-positive pressure, and holding the temperature for 30-120 min; vacuumizing to carry out secondary sintering at 1380-1470 DEG C at the temperature rise speed of 5-20 DEG C / min for 60-120 min, and cooling to room temperature to finish sintering. Compared with conventional sintering methods, the method has the advantages that cobalt magnetism rises from 4.2 to 5.2, shrinkage of the primarily sintered product reaches 80-90%, grain surface energy drops quickly, sensitivity to oxygen decreases, secondary vacuum sintering after cooling may help reduce inter-furnace carbon loss via high temperature rise speed, inner gas can be removed, and inner porosity of the product is greatly decreased.

The invention discloses a packaging structure based on garden aquatic plants, and relates to the technical field of aquatic plant packaging. The packaging structure based on the garden aquatic plants comprises a fixed base, wherein a packaging barrel is fixed to the top of the fixed base; an adjusting threaded rod penetrates through the bottom of the packaging barrel; the outer surface of the section, located in the packaging barrel, of the adjusting threaded rod is in transmission connection with an internal thread sliding block; a limiting sliding groove matched with the internal thread sliding block is fixed to the inner bottom of the packaging barrel; and the outer surface of the internal thread sliding block is rotationally connected with a supporting rod which penetrates through the limiting sliding groove and extends out of the limiting sliding groove through a bolt. According to the packaging structure based on the garden aquatic plants provided by the invention, when the aquatic plants are packaged, the roots of the aquatic plants can be clamped and fixed, the aquatic plants are prevented from greatly shaking when being vibrated in an aqueous solution, protection on the aquatic plants is improved, the plants can be conveniently taken out during unsealing, and damage to the roots of the plants is reduced; and sufficient oxygen is provided for breathing of the aquatic plants, so that the situation that the aquatic plants die due to long-time oxygen-deficient environment is reduced, and the transportation survival rate is increased.

The invention relates to the technical field of SCR flue gas denitration, particularly to a nitrogen and oxygen generation device and a catalyst reaction performance detection device of a thermal power plant. The nitrogen and oxygen generation device is disclosed, wherein when a flow regulating valve is turned off, a molecular sieve in an adsorption column separates oxygen to obtain pure nitrogen;when the flow regulating valve is turned on, the concentrations of nitrogen and oxygen can be adjusted according to the opening degree of the flow regulating valve to obtain required nitrogen and oxygen concentrations. The generation device can directly replace purchased nitrogen and oxygen, reducing the test cost of a catalyst activity test, and reducing a step of mixing pure nitrogen and pure oxygen, and making operation convenient and fast.

The invention belongs to the technical field of breathing equipment, and particularly relates to a breathing machine system which comprises an air path, an oxygen path, a secondary noise reduction mixing box, a mixed gas path, a high-pressure oxygen module and an oxygen generation module. The air outlet end of the air path and the air outlet end of the oxygen path are connected to the second-stage noise reduction mixing box, the air inlet end of the mixed gas path is connected with the second-stage noise reduction mixing box, and the air outlet end of the mixed gas path is connected with a patient. The oxygen path comprises an oxygen source control valve, the high-pressure oxygen module is connected with a first inlet of the oxygen source control valve, and the oxygen generation module is connected with a second inlet of the oxygen source control valve; the first inlet and / or the second inlet can communicate with the outlet, so that the high-pressure oxygen module and / or the oxygen production module conveys oxygen to the oxygen path. The oxygen generation module can prepare low-pressure oxygen, the dependence of the breathing machine on high-pressure oxygen is reduced, during first-aid transfer and treatment, air supply through an air bottle is avoided, the transfer flexibility is improved, and the treatment requirement is met.

The invention discloses a method for transforming CO2 into a chemical energy source substance. The method includes the steps: (1) performing disruptive discharge on CO2 gas to form high-temperature CO2 plasma jet with the temperature of 2000-5000K under the action of an electric field; (2) further transforming CO2 in the CO2 plasma jet obtained in the step (1) into CO in a fixed bed reactor filledwith carbonaceous substances or aluminum oxide particles. CO2 plasma comprises non-cracked CO2 and CO, O and O2 generated by cracking. Ingeniously, the carbonaceous substances rapidly devour oxygen in cracked gas by the aid of the high-temperature environment of the high-temperature CO2 plasma jet, the carbonaceous substances react with non-cracked CO2 and are transformed into CO, heat energy carried by the CO2 plasma jet is sufficiently used, temperature is rapidly reduced, reverse reaction is effectively avoided by temperature reduction and oxygen decrease, stable CO production is realized,and CO2 transformation rate and electric energy use efficiency are greatly increased.

The invention relates to the technical field of bio-based materials, and discloses an automatic oxygen supply device for an agricultural straw fermentation box, the oxygen supply device comprises an air cylinder II, a rubber plug is movably mounted in the middle of the air cylinder II, oxygen in an air cylinder I is used along with the reduction of oxygen in the fermentation box, a piston rod I moves downwards in the air cylinder I, the piston rod drives a movable rod, a connecting rod and a socket to move downwards, and the socket is finally connected with the jack. An electromagnet is electrified at the moment, the electromagnet shows magnetism, an iron block is attracted accordingly, a limiting rod is far away from the ratchet of a ratchet gear, and the ratchet gear rotates accordingly. The ratchet gear rotates to drive the movable rod to move left and right, the movable rod pushes a piston rod II to move up and down in the air cylinder II, then oxygen enters the fermentation box through a hose of the air cylinder II, when oxygen is reduced in the oxygen using process, an automatic oxygen supply device is triggered accordingly, manual oxygen supply is avoided, and bacterial infection in the fermentation box is reduced.

The invention relates to the field of filling technology, and discloses an overflow prevention device for filling, which is electrically connected to a filling assembly, includes a nitrogen supply device and an overflow detection module communicated with the nitrogen supply device, and communicates to the container to be filled. High-pressure nitrogen can quickly fill the container with nitrogen, remove oxygen, and reduce the possibility of explosion of flammable and explosive chemical liquids during the filling process. , the air pressure in the tube remains unchanged. Once the gas outlet end of the inflatable tube comes into contact with the liquid surface, it will hinder the nitrogen gas, thereby increasing the air pressure in the market tube, triggering the air pressure detection module to send an alarm signal, and driving the filling component to stop filling, which is highly safe. , strong versatility.

A method of operating a fuel oxygen reduction unit for a vehicle or a gas turbine engine of the vehicle is provided. The fuel oxygen reduction unit including a contactor and a fuel gas separator, and further defining a stripping gas flowpath in flow communication with a stripping gas inlet of the contactor and a stripping gas outlet of the fuel gas separator. The method includes receiving data indicative of a parameter of a stripping gas flow through the stripping gas flowpath or of a component in flow communication with the stripping gas flow through the stripping gas flowpath; and determining an operability condition of the fuel oxygen reduction unit, or a component operable with the fuel oxygen reduction unit, based on the data received indicative of the parameter of the stripping gas flow or of the component in flow communication with the stripping gas flow.

The invention provides a hoisting structure of a steel ladle, which can solve the problem that when the steel ladle is positioned in a VOD (vacuum oxygen decrease) furnace or a pit, a crane operator is hard to observe hoisting points of trunnions of the steel ladle to cause that the steel ladle is hard to hoist. The hoisting structure of the steel ladle comprises two lateral trunnions of the steel ladle and is characterized in that hoisting structures are formed on the two lateral trunnions of the steel ladle.

The invention discloses a pure oxygen smelting device of a flash furnace. The pure oxygen smelting device of the flash furnace comprises a furnace body and a material supply device, and further comprises an oxygen tank, wherein a nozzle with a downward opening is arranged at the top of a reaction tower of the furnace body; three oxygen pumps are arranged at the top of the oxygen tank; each oxygen pump is connected with a central oxygen pipeline, a dispersed oxygen pipeline and a process oxygen pipeline through pipelines respectively; a control panel is mounted at the bottom of the oxygen tank; a flow meter is mounted on a material pipeline; the control panel is electrically connected with the oxygen pumps and the flow meter respectively; and a water cooling pipeline is mounted on the outer side of a sedimentation tank of the furnace body. According to the pure oxygen smelting device, the three independent oxygen supply pumps are arranged to provide oxygen amounts with different proportions for the central oxygen pipeline, the dispersed oxygen pipeline and the process oxygen pipeline respectively; the flow meter is used for metering the amount of materials discharged into the reaction furnace; a signal is transmitted to the control panel and an oxygen supply demand amount is judged; and output power of the oxygen pumps is controlled respectively and functional adjustment of an oxygen introducing amount is realized, so that the materials react to obtain sufficient oxygen and flue gas is reduced.