10results about How to "Increase oxidation rate" patented technology

This invention discloses an ammonia-based desulfurization system and method based on zoned control, comprising a desulfurization tower, an absorption circulation tank, an ammonia water tank, a washing tank, and a process water tank. The desulfurization tower, from top to bottom, has a flue gas outlet, a demisting section, a second-stage absorption layer, a first-stage absorption layer, and a concentration section. The absorption circulation tank is divided into an upper oxidation tank and a lower absorption circulation section by a partition. The recovered liquid from the first-stage absorption is connected to the absorption circulation section of the absorption circulation tank via a pipeline; the oxidation tank has an aeration pipe connected to the spray inlet of the second-stage absorption via a pipeline; the lower concentration section of the desulfurization tower is connected to the oxidation tank via a liquid delivery pipeline. The washing tank supplies water to the demisting section and the absorption circulation tank; the ammonia water tank replenishes ammonia water to the oxidation tank, the first-stage absorption layer, and the absorption circulation section of the absorption circulation tank. This invention eliminates coupling interference between absorption and oxidation by dividing the tank into zones within the same tank; combined with two-stage absorption and demisting recovery, it effectively controls ammonia escape while ensuring efficient sulfur dioxide removal.

This invention proposes a solar-powered electrocatalytic AOR coupled with biological denitrification for complete nitrogen removal, comprising a solar power unit, an ammonia electrolyzer, and a biological denitrification unit. In the ammonia electrolyzer, the anode and cathode are connected to the positive and negative terminals of the solar power unit, respectively. The anode includes a conductive substrate and a heteroatom-doped nickel-based metal catalyst loaded on it. Solar power reduces energy consumption, and the battery allows for continuous operation even at night, extending the unit's lifespan. The solar-powered electrocatalytic AOR coupled with biological denitrification provided by this invention has a reasonable design, uses a low-cost conductive substrate as the catalytic electrode, has a simple preparation method, is easy to scale up, is highly efficient, and produces green and pollution-free products. It achieves a nitrogen removal efficiency of over 98%. Electrocatalytic ammonia oxidation combined with multiple electrode sets accelerates the ammonia oxidation process, saving significant time and costs and enhancing ammonia nitrogen treatment capabilities.

The application discloses a kind of cooperation expired medicine, bauxite iron recovery method of pharmaceutical wastewater, comprising the following steps: S1, bauxite is crushed, grinds, and then mixed with hydrogen peroxide solution, and bauxite slurry is prepared;S2, the expired medicine, pharmaceutical wastewater after crushing is added in bauxite slurry, and is prepared as reaction raw material;S3, after stirring, reaction raw material is added in high temperature and high pressure reaction kettle, and after reaching supercritical state, electric heating is closed, and reaction is carried out by relying on oxidation self-heating until end;S4, after cooling, gas-liquid separation is carried out, and liquid-solid mixture is carried out magnetic separation, and Fe3O4 is recovered.The application realizes the dealkalization treatment of bauxite, and the iron in bauxite is stably recovered, and the remaining solid components can be better utilized, and due to the supercritical water oxidation on organic matter super strong oxidizability, the expired medicine in system is completed harmless degradation, and the heat generated by organic matter oxidation is relied on to reduce energy consumption cost.

The invention discloses a chamfering device and a chamfering method for intelligently manufacturing a compressor cylinder block, and relates to the technical field of chamfering equipment. The device comprises two device bodies, a fixing table is fixedly installed between the sides, close to each other, in the two device bodies, a storage table is fixedly installed on the front face of the fixing table, a driving mechanism is arranged between the sides, close to each other, in the back ends of the two device bodies, and a machining mechanism is arranged on the outer wall of the driving mechanism in a penetrating mode; an electric threaded rod is rotationally mounted in one end of the front face of the machining mechanism, and a sliding plate penetrates through and is movably mounted on the outer wall of the electric threaded rod. The air dryer is prevented from being eroded by external dirt during standing, the dirt is blown to the chamfering head or the surface of a workpiece during working of the air dryer, scraping is further caused, the chamfering precision is reduced, continuous blowing is achieved during machining, and the situation that workpiece flying wires are attached to the surface of the chamfering head due to high chamfering temperature is effectively avoided.

This invention relates to a method for enhancing the stirring intensity during vanadium extraction, belonging to the field of steel pretreatment. The method includes the following three steps: first, vanadium-containing molten iron is added to a converter; then, a top-and-bottom blowing process is used for smelting; coolant is added according to the composition and temperature at the smelting endpoint; finally, semi-steel is removed from the lance at the smelting endpoint. The top-blown gas is an oxygen-nitrogen mixture, and the total flow rate of the oxygen-nitrogen mixture is 31,000~35,000 Nm³. 3 / h; the oxygen consumption per ton of iron, the top blowing lance position, and the nitrogen consumption per ton of iron are controlled in segments according to the blowing period; the bottom blowing gas is nitrogen, and the nitrogen supply intensity is controlled in segments according to the blowing period. This invention significantly enhances the stirring intensity of the molten pool without significantly increasing the temperature rise rate through the synergistic effect of the high-flow-rate oxygen-nitrogen mixed gas from the top and the variable-flow-rate nitrogen from the bottom, thereby shortening the mixing time and enhancing the slag-metal reaction, further increasing the vanadium oxidation amount and further reducing the TFe content in the vanadium slag.

The invention discloses an application of a germanium-silicon etching solution with a high selection ratio. Specifically, the invention provides an application of the germanium-silicon etching liquid in selective etching of a sacrificial layer in a GAA MOSFET (Good Acrylic Acid Metal-Oxide-Semiconductor Field Effect Transistor) structure. The germanium-silicon etching liquid is prepared from the following components in percentage by mass: 0.1%-5% of fluoride, 5%-70% of an oxidizing agent, 0.1%-2% of an inhibitor and 1%-5% of a buffer component and a solvent, the sum of the mass percents of all the components is 100%, and the mass percents are the mass percents of all the components in the total mass of the germanium-silicon etching liquid; and the inhibitor is an EO-PO polymer. The germanium-silicon etching liquid can selectively accelerate the etching rate of a silicon-germanium alloy, and has a relatively high selection ratio.

This utility model relates to the field of wastewater treatment technology, specifically an ozone disinfection device for wastewater treatment. It includes a reaction chamber with multiple stirring drums fixedly installed inside. A transmission assembly is fixedly installed on the upper surface of the reaction chamber, and a gas distribution assembly is fixedly installed at the lower end of the reaction chamber. The gas distribution assembly includes multiple connecting pipes fixedly installed on the lower surface of the reaction chamber, with multiple gas distribution pipes equidistantly fixed on the outer surface of each connecting pipe. In this utility model, by setting multiple stirring drums inside the chamber, wastewater enters each stirring drum separately for reaction, reducing the cross-sectional area of ​​wastewater in a single space. This facilitates the reaction between ozone and wastewater. Simultaneously, ozone is injected into the wastewater inside the multiple stirring drums at different heights, ensuring that wastewater at different heights directly contacts the ozone, maintaining sufficient ozone exposure for all wastewater levels and accelerating the ozone oxidation rate.

The invention discloses a methane-oxidizing nitrogen-fixing bacterium and application thereof, and belongs to the technical field of agriculture. The bacterial strain is preserved in Guangdong Microbial Culture Collection Center on September 25, 2025, the preservation number is GDMCC 67018, and the bacterial strain is named as Methylocystis iwaonis in taxonomy. The bacterial strain can grow by using methane and methanol as a unique carbon source, nitrogen is used as a unique nitrogen source for nitrogen fixation, and the bacterial strain belongs to type II methane-oxidizing bacteria with methane oxidation and nitrogen fixation functions; meanwhile, the gene has a pmoA methane monooxygenase gene and a nifH nitrogenase gene cluster, and has dual metabolic potentials; a relatively high methane oxidation rate can still be kept in a low-nitrogen environment, and an excellent nitrogen self-sufficiency characteristic is shown; the method has potential rice field emission reduction and nitrogen fixation synergistic application value, can be applied to the fields of rice field methane emission reduction, biological nitrogen fertilizer research and development, low-carbon agriculture, carbon-nitrogen coupling cycle regulation and the like, can provide new microbial resources for rice field greenhouse gas emission reduction, and also provides an important theoretical and application basis for development of sustainable agriculture with low nitrogen input.

The present application belongs to the field of steel metallurgy and comprehensive utilization of vanadium-titanium resources, and particularly relates to a method for efficiently extracting vanadium from molten iron with top and bottom composite reinforcement. The technical scheme solves the problems of traditional converter vanadium extraction, such as difficult temperature control, uneven stirring, low vanadium oxidation rate, long converter blowing time, and fluctuation of vanadium slag quality. In the blast furnace tapping stage, modified cold solid balls and iron oxides are used as composite solid oxidants to pre-oxidize and extract vanadium using the impact kinetic energy of iron flow and quickly form initial slag. After the molten iron is poured into the vanadium extraction converter, top blowing of nitrogen-oxygen mixed gas and bottom blowing of CO2 are used for sectional stirring and composite reinforcement. No additional cooling agent is added in the converter, and precise temperature control is achieved to realize vanadium extraction and carbon preservation and improve the quality of vanadium slag. The vanadium oxidation rate is stable at ≥92%, the converter blowing time is shortened by more than 30%, the TFe of vanadium slag is reduced, the V2O5 grade is improved, and the efficiency of vanadium extraction and the recovery rate of vanadium resources are significantly improved.

The invention discloses a germanium-silicon etching solution with a high selection ratio. Specifically, the germanium-silicon etching liquid provided by the invention consists of the following components in percentage by mass: 0.1-5% of fluoride, 5-70% of an oxidizing agent, 0.1-2% of an inhibitor, and 1-5% of a buffer component and a solvent, the sum of the mass percents of all the components is 100%, and the mass percents are the mass percents of all the components in the total mass of the germanium-silicon etching liquid; and the inhibitor is an EO-PO polymer. The germanium-silicon etching liquid can selectively accelerate the etching rate of a silicon-germanium alloy, and has a relatively high selection ratio.