40 results about "Consumption oxygen" patented technology

The invention discloses a whole-process autotrophic nitrogen removal method. The method mainly comprises the following steps: 1) inoculating anammox sludge into a reactor; 2) introducing nitrogen into the wastewater so as to reduce the DO (Dissolved Oxygen) concentration of wastewater to 0mg / L (milligram per liter) by filling nitrogen into the wastewater, and regulating the pH value of a water inflow barrel to reach 7 to 8; 3) gradually increasing the water inflow load by increasing the total nitrogen concentration of the wastewater and reducing the hydraulic retention time; 4) gradually increasing the DO concentration in the wastewater after a reaction is stable, thereby culturing bacteria capable of consuming oxygen in the reactor; 5) forming the oxygen-containing bacteria on the outer layer of the anammox sludge after performing the culturing acclimatization for half a month; 6) inoculating nitrosobacteria into the reactor and properly lowering the nitrate nitrogen concentration in the inflowing water while performing aeration to the reactor and controlling aeration quantity at the same time, thereby partially converting ammonia nitrogen entering the reactor into the nitrate nitrogen, i.e., the concentration (mg / L) ratio of the ammonia nitrogen to the nitrate nitrogen is 1:1 or so; regulating the pH value in the reactor to reach 7.5 to 7.7 by using a pH controller; 7) gradually increasing the water inflow load, thereby removing the nitrogen stably. The invention further discloses a device for realizing the whole-process autotrophic nitrogen removal method.

A membrane electrode assembly includes an anode, a cathode, a membrane disposed between the anode and the cathode, and an extended catalyzed layer between the cathode and the membrane, the extended catalyzed layer being adapted to consume oxygen and decompose hydrogen peroxide to produce water.

The invention relates to a smelting furnace and a smelting method for extracting valuable metals from laterite-nickel ore. The smelting furnace comprises a furnace body with a furnace chamber, the furnace body is sequentially divided into a hearth section, a furnace body section and a furnace top section from bottom to top; the bottom side of the hearth section is in communication with an electricheating fore well, the electric heating fore well is provided with a deslagging port and a siphon port, the position of the inner end of the siphon port is lower than the position of the inner end ofthe deslagging port, and the bottom area of an inner cavity of the electric heating fore well is 1 / 2-3 / 2 of the bottom area of an inner cavity of the hearth section; the inner bottom face of the hearth section inclines in the direction where the electric heating fore well is located, and the included angle between the inner bottom face of the hearth section and the horizontal plane is 5degrees-20degrees. After the laterite-nickel ore, the additive, the flux and the like are mixed, the mixture can be directly smelted in a smelting furnace, pelletizing treatment is not needed, and the smeltingprocess is simplified. The smelting furnace can be used for carrying out direct, efficient and low-energy-consumption oxygen-enriched smelting on the low-grade laterite-nickel ore to generate nickelmatte, nickel matte and the like with economic values.

A fuel cell system having a fuel cell with an anode and a cathode wherein both the cathode and anode each have a flow path with an inflow and outflow. A gaseous source containing oxygen is connected to the inflow of the cathode flow path while a gaseous fuel source is connected to the inflow of the anode flow path. Upon shutdown of the fuel cell, a control system reduces the stoichiometric ratio at the anode to less than or equal to one to thereby deplete the oxygen from the gas at the cathode. A normally closed valve is fluidly connected between the cathode outflow and the anode inflow. The control system opens the valve upon shutdown of the fuel cell to thereby purge the fuel from the anode flow path with the oxygen depleted outflow from the cathode flow path.

A coal spontaneous combustion tendency identification device based on low-temperature oxidation oxygen consumption, which consists of a constant temperature control box (1), an oxygen concentration tester (2), an oxygen consumption test container (3) and a gas outlet pipe (5). The oxygen test container (3) is a quartz glass spherical cavity with a flat bottom and a long bottleneck, the spherical cavity of the oxygen consumption test container (3) is located in the constant temperature control box (1), and the upper part of the long bottleneck extends out of the constant temperature control box (1) and sealed by the piston type sealing plug (4), one end of the gas outlet pipe (5) passes through the piston type sealing plug (4) and stretches into the oxygen consumption test container (3), and the other end is connected with the oxygen concentration tester (2) are connected, and the air valve switch (6) is connected in series on the gas outlet pipe (5). The invention makes the coal spontaneous combustion tendency identification method more scientific and reasonable, and the identification process truly reflects the low-temperature oxidation characteristics of the coal, so the identification result is accurate and reliable.

The invention relates to a vacuum encapsulation process, comprising the following steps: providing a silicon wafer and a glass wafer; fabricating a structure or device requiring vacuum encapsulation on one of the silicon wafer and the glass wafer; Open grooves are made on the other of the chips, and a metal layer for local oxidation is made in the grooves; the silicon wafer and the glass wafer are bonded by anodic to form a microcavity structure, which has a structure consisting of The airtight cavity formed by the groove, the metal layer is located inside the airtight cavity, the oxygen generated by the anode bonding enters the inside of the airtight cavity; the radio frequency excites the oxygen inside the airtight cavity to form oxygen plasma, and the metal layer and the oxygen plasma Oxidation reaction occurs in the body to continue to consume oxygen until the oxygen can no longer be ignited to form oxygen plasma. The vacuum encapsulation process provided by the present invention utilizes silicon-glass anode bonding to generate oxygen and the characteristics of continuous oxidation of metal films in oxygen plasma to finally realize vacuum encapsulation.

The present invention provides a method and system for establishing a model value of soot content of a gasoline particulate filter. The method for establishing a model value of soot content of a gasoline particulate filter includes: obtaining the original emission of soot by measuring on a bench or a rotating hub of an engine value; according to the measurement of the engine sensor to obtain the combustion rate of soot, the combustion rate of the soot is multiplied by the combustion time to obtain the combustion amount; the original emission value of the soot and the combustion amount are subtracted and integrated to obtain the soot content model value; the oxygen consumed by the combustion of the soot is measured According to the amount of oxygen consumed by the soot combustion, combined with the physical model of combustion oxygen consumption, the measured value of the soot content is obtained; the measured value of the soot content is compared with the model value of the soot content, and according to the measured value of the soot content Correct the soot content model values.

The invention discloses an inerting oxygen-consumption stopping agent for preventing a goaf from self-igniting and a preparation method thereof and belongs to the field of self-ignition prevention andtreatment materials in the coal mine goaf. The stopping agent is composed of an iron-containing oxygen-consumption agent, carbonate and thickener, wherein the mass ratio of the iron-containing oxygen-consumption agent to carbonate to thickener is 2:(1-2):(1-4). The preparation method comprises the following steps that 1, according to a matching proportion, the iron-containing oxygen-consumption agent is weighed and activated by using a sulfuric acid solution, the sulfuric acid solution is filtered, and the activated iron-containing oxygen-consumption agent is obtained; 2, according to a matching proportion, carbonate and thickener are added to the activated iron-containing oxygen-consumption agent in sequence and evenly stirred, and the inerting oxygen-consumption stopping agent for preventing the goaf from self-igniting is obtained. The preparation method of the stopping agent is simple, has the quadruple advantages of oxygen consumption, oxygen isolation, goaf inerting and cooling,and can improve the oxygen-consumption performance of a common deoxidation-type stopping agent, release inerting gas CO2, effectively lower the threat of spontaneous ignition of residual coal in the goaf, and provide a guarantee for safe production.