23 results about "Chemical effects" patented technology

The invention discloses a corrosion-induced stress full-coupling characterization method. The method comprises the following steps: characterizing an electrochemical corrosion degree based on a corrosion dynamics principle; representing a three-dimensional stress field of the metal structure based on a mechanical constitutive relation; the interaction of corrosion and stress is considered based on a corrosion expansion theory and a mechanical chemistry theory; a corrosion-induced stress full coupling model considering the interaction of corrosion and stress; and the influence of the corrosion induced stress on the corrosion process is quantified. According to the method, a corrosion expansion theory and a mechanical chemical effect are introduced into a mechanical constitutive equation and a current density equation respectively, and the corrosion-induced stress full-coupling characterization method is constructed. According to the method, collaborative characterization of force and electrochemical information in the corrosion dynamic evolution process is realized, stress evolution information induced by the corrosion process is characterized, the influence of corrosion induced stress on the corrosion process is considered, and time nonlinear characteristics and spatial heterogeneity of mechanical and electrochemical parameters in the pitting evolution process are disclosed.

The invention discloses a high-performance lithium iron phosphate composite material and a preparation method thereof, and belongs to the technical field of battery materials. Stirring the modified lithium iron phosphate, the modified carbon nanotube, benzoin dimethyl ether and chloroform, irradiating for 15 minutes under a 365 nm ultraviolet lamp, and drying to obtain a premix; and mixing the premix, glacial acetic acid, polyethylene glycol and DMF, heating to 70-80 DEG C, stirring for 4-6 hours, cooling, filtering, washing, immersing in a zinc acetate solution, standing, filtering, washing and drying to obtain the high-performance lithium iron phosphate composite material. The active substance-modified lithium iron phosphate and the conductive agent-modified carbon nanotube have chemical action, and the premix obtained after the reaction of the active substance-modified lithium iron phosphate and the conductive agent-modified carbon nanotube contains hydroxyl and benzotriazole structures, so that hydrogen bond interaction exists between the premix and the binder, the adhesive force between the premix and the aluminum foil current collector is excellent, and therefore, the performance of the lithium ion battery is improved. The finished battery prepared from the lithium iron phosphate composite material is excellent and stable in electrochemical performance.

The present invention provides a brazed plate heat exchanger, which includes a fixing frame, and a heat exchange main body is fixed inside the fixing frame; a water treatment assembly, and a water treatment assembly that can slide vertically is sleeved outside the heat exchange main body. The water treatment assembly includes an installation frame, and a multi-layer magnetic treatment part is arranged on the inner wall of the installation frame; the magnetic treatment part includes a plurality of magnetic force blocks evenly distributed inside the installation frame; a plurality of mixing blocks with magnetism, and the mixing blocks are arranged on the heat exchange plates. The technical solution in this application realizes the combination of the physical action of the magnetic mixing blocks and the chemical effect of magnetization treatment, effectively reduces the formation and deposition of scale, the movement of the magnetic balls increases the turbulence intensity, reduces the fluid boundary layer thickness, improves the heat exchange efficiency, reduces the problems of blockage and corrosion caused by scale, reduces the cleaning frequency, extends the equipment operation cycle, reduces or avoids the use of chemical cleaning agents, and reduces the maintenance cost and environmental impact.

The present invention provides a centrifugal cavitation generator comprising a housing, an impeller, and a drive device. The impeller is located within the housing and includes a flow guide and a hollow housing. The hollow housing is provided with a flow guide on one side for guiding liquid into the housing, and the other side of the hollow housing is connected to the drive device. The hollow housing is provided with at least one set of through-hole units. The rotation of the impeller causes liquid to flow out through the through-hole units, generating a cavitation cloud. The housing wall is provided with several protrusions, located near the through-hole units on the hollow housing, to collapse the cavitation bubbles. The present invention utilizes the mechanical, thermal, and chemical effects generated by this energy to achieve wastewater degradation and treatment.

The invention relates to the technical field of oxygen-enriched combustion safety and flammability limit prediction, and provides a flammability limit value prediction method and application, and the method comprises the steps: obtaining the initial parameters of a gas fuel in a mixed atmosphere of oxygen and carbon dioxide; simulating a combustion process by using an element reaction mechanism, and outputting a curve of component mole fractions changing along with time; the combustion enthalpy change rate under the target atmosphere and the virtual atmosphere is calculated based on the curve, and carbon dioxide in the virtual atmosphere is replaced with virtual gas which has the same thermophysical property but does not have chemical reactivity; respectively calculating combustion heat release, mixture heat absorption and heat radiation; and in combination with the enthalpy change rate and the energy balance equation, the combustible limit value is solved and determined through numerical iteration. By quantifying the chemical effect and thermophysical influence of carbon dioxide, the problem of insufficient precision caused by neglecting the participation of carbon dioxide in reaction and unique thermal property in the oxygen-enriched combustion environment in the existing model is solved, and the method is suitable for the safety design of a combustion system.

The present application relates to the technical field of oxygen-enriched combustion safety and flammability limit prediction, and provides a flammability limit value prediction method and application, which comprises the following steps: obtaining initial parameters of a gas fuel in an oxygen and carbon dioxide mixed atmosphere; simulating a combustion process by using a base reaction mechanism, and outputting a curve of component mole fraction changing with time; calculating a combustion enthalpy change rate in the target atmosphere and a virtual atmosphere based on the curve, wherein the carbon dioxide in the virtual atmosphere is replaced by a virtual gas with the same thermal properties but without chemical reactivity; respectively calculating a combustion heat release, a mixture heat absorption and a heat radiation; and combining the enthalpy change rate and an energy balance equation to determine the flammability limit value by numerical iteration. The present application quantifies the chemical effect and thermal physical influence of carbon dioxide, solves the problem of insufficient accuracy of existing models in the oxygen-enriched combustion environment due to the neglect of the reaction of carbon dioxide and its unique thermal properties, and is suitable for combustion system safety design.

The present application belongs to the technical field of corrosion simulation of coating, and discloses a method for simulating corrosion test of plated steel in extremely cold atmospheric environment, comprising the following steps: (a) pretreatment of the sample to be tested: acetone degreasing, alcohol cleaning, and pasting adhesive tape on both ends and one side of the sample; (b) stress loading on the sample to be tested by using a three-point bending device; (c) simulation of corrosion test: depositing corrosion medium NaHSO3 solution on the surface of the sample, and then placing the stress loading device and the sample in a high-low temperature alternating damp-heat test chamber, and performing the test according to "room temperature-constant low temperature-room temperature wetting-room temperature drying", each cycle being 12-24 h, and the total test time being 84 h-840 h. The present application can realize mechanical and chemical effects under stress and multi-environment factor coupling during the process of tensile stress under different loads, and conforms to the corrosion failure characteristics of structural parts in actual service.

The invention belongs to the field of sewage treatment, and particularly relates to a sewage electro-catalysis purification device which comprises an oxidation tank, a water inlet pipe is fixedly connected to the bottom of the oxidation tank, a water outlet pipe is fixedly connected to the side face of the oxidation tank, two sets of supports are fixedly connected to the inner side wall of the oxidation tank, a set of cathode plates and a set of anode plates are fixedly connected to the supports and are arranged in a staggered mode, and the water inlet pipe is located below the cathode plates and the anode plates. A sewage flowing channel is formed between every two adjacent cathode plates and anode plates, during use, sewage is fed into the oxidation tank through the water inlet pipe and flows through the sewage flowing channels between the anode plates and the cathode plates, the sewage subjected to catalytic treatment is discharged from the water outlet, and through an electrocatalytic oxidation technology, under the action of an external electric field, the sewage is discharged into the oxidation tank through the water inlet pipe. The technology of efficiently purifying pollutants in water is achieved through physical and chemical actions, and no chemical agent is added except an electric field, so that the use of the chemical agent is reduced.

The machining clamp comprises a bottom plate, two sets of soaking grooves are formed in the upper end face of the bottom plate, two sets of liquid discharging pipes are fixedly connected to the side wall of the bottom plate and communicated with the interiors of the two sets of soaking grooves respectively, two sets of side plates are fixedly connected to the upper end face of the bottom plate, and two sets of lead screw sleeves are slidably connected between the two sets of side plates. The soaking groove is in smooth transition to the end face of the bottom plate, and an elastic mechanism for driving the clamping plate to be tightly attached to the inner bottom of the soaking groove is installed on the outer wall of the sliding rod. By designing the soaking tank and cleaning the clamping plate through the cleaning solution when the clamping plate slides in, greasy dirt on the clamping plate is effectively removed, the adverse effect of greasy dirt accumulation on clamping force is prevented, after the greasy dirt is removed through the chemical effect of the cleaning solution, the clamping plate can keep high friction force and stable clamping force, and the clamping plate is not prone to falling off. Therefore, the workpiece is firmly fixed in the machining process, displacement or vibration is reduced, and machining precision is remarkably improved.

The invention relates to the technical field of semiconductors, discloses a method for improving a damaged layer of a silicon wafer by optimizing a polishing process, and aims to solve the problems of contradiction between mechanical and chemical effects and incapability of dynamic optimization in the conventional polishing process. The method is characterized in that a closed-loop feedback control system based on in-situ and real-time surface state monitoring is constructed, and the system integrates a monitoring module, a dynamic control unit and a slurry conveying module; the damage state of the surface of the silicon wafer is monitored in real time through a monitoring module (preferably including acoustic emission and electrochemical impedance spectroscopy), and a dynamic control unit adjusts the polishing pressure, the relative rotating speed and slurry components according to the damage state, so that multi-stage treatment is achieved. By means of the scheme, real-time optimization of the chemical-mechanical synergistic effect can be achieved, secondary damage is effectively restrained, the ultra-high-quality silicon wafer surface which is flat in atomic scale and extremely few in defect is obtained, and the process robustness is remarkably improved.

The present invention relates to a lithium iron phosphate battery formation method, comprising the following steps: (1) adding a gas flowmeter to a formation vacuum pipeline; (2) taking a lithium iron phosphate battery to be formed after liquid injection, forming it according to the following staged formation steps, and recording the gas flow of each stage, the staged formation steps are: S1: high temperature shelving for a period of time; S2: 0.02-0.05C constant current to 2.5V; S3: shelving for a period of time; S4: 0.05-0.2C constant current to 3.3V; S5: shelving for a period of time; S6: 0.2-0.5C constant current to 3.5V; S7: shelving for a period of time; (3) setting different vacuum degrees in different formation stages according to the gas flow rate of step (2), and obtaining formation steps with different vacuum degrees in different stages. The lithium iron phosphate battery formation method of the present invention ensures that the formation gas is completely extracted while reducing the amount of the extracted electrolyte, thereby ensuring the formation effect.

The invention discloses a solid waste harmlessness and recycling method and system based on multi-energy field cooperation and multi-source solid waste tempering, and the method comprises the steps: mixing a target main solid waste raw material with a liquid medium, adding a first-class alkaline solid waste conditioner, and carrying out high-pressure jet flow homogenization circulation treatment to obtain homogeneous slurry; transferring the homogenized slurry into a ball mill, adding a second type of solid waste-based conditioner for ball milling treatment, and realizing deep dissociation and stabilization of pollutants by utilizing a mechanochemical effect; transferring the ball-milled slurry into an ultrasonic-microbubble reaction separation tower, adding the red mud slurry, and separating heavy metal enriched scum through the synergistic effect of ultrasonic cavitation and micro-nano bubbles; treating the separated three-phase system to obtain a top-layer heavy metal enrichment, a bottom-layer purified main solid waste matrix and an intermediate liquid phase, and carrying out chemical precipitation on the intermediate liquid phase to recover phosphorus and nitrogen elements. According to the invention, deep conversion and precise separation of industrial solid waste pollutants and high-value recovery of valuable components are realized.

A high voltage discharge generating a plasma wave front is disposed within a headspace over an oil-containing liquid in order to create various chemical changes within the headspace, and ultimately within the liquid in order to inactivate various microbes, synthesize new chemicals, speed separation of a mixture, and aid in oil extraction. Such a discharge may be repeated at an optimum duration and duty-cycle to maximize the chemical effects of the non-equilibrium plasma at a substantially lower temperature than for an equilibrium plasma.

The present invention discloses a rotary-cutting jet abrasive-free flattening processing device based on vortex cavitation, comprising a multi-axis mobile control platform, a workstation is arranged on the multi-axis mobile control platform, a rotary-cutting vortex cavitation polishing device is arranged above the workstation, the rotary-cutting vortex cavitation polishing device is connected to a liquid supply device, and the liquid supply device provides polishing liquid for the rotary-cutting vortex cavitation polishing device. Step one, prepare polishing liquid; step two, install the workpiece on the workstation; step three, move the rotary-cutting vortex cavitator and the workpiece, so that the lower end of the rotary-cutting nozzle moves to a predetermined processing position. The rotary-cutting jet abrasive-free flattening processing device and method based on vortex cavitation provided by the present invention combines the chemical effect of cavitation and the microjet erosion effect to perform abrasive-free polishing on the workpiece, which can achieve a better polishing effect.

The application relates to the technical field of insulating materials, and discloses a cold-shrink cable accessory rubber material, a preparation method thereof and a cold-shrink cable accessory. The cold-shrink cable accessory rubber material comprises the following components in mass fractions: 100 parts of ethylene-propylene-diene rubber, 40-70 parts of white carbon black, 10-30 parts of kaolin, 5-20 parts of mica powder, 1-5 parts of a silane coupling agent, 2-6 parts of a peroxide vulcanizing agent, 1-4 parts of a crosslinking agent, 5-20 parts of paraffin oil and 1-3 parts of an antioxidant. The specific-structure antioxidant is used in cooperation with fillers such as the white carbon black, the calcined kaolin and the mica powder, and the physical and chemical effects are combined to effectively resist ultraviolet and oxygen aging, significantly slow down discoloration and cracking of the material in a complex outdoor environment, maintain stable electrical performance, and prolong the service life of the material.

The invention discloses a method and a system for evaluating soot characteristics of characterization fuels for complex fuels and a medium, the evaluation method comprises the following steps: preparing carbon-based fuels, and preparing characterization fuels with different components of the carbon-based fuels; building a laminar flow diffusion flame system to obtain laminar flow diffusion flame; after the flame is stable, carrying out a PAHs-LIF test; a Soot-LII test is carried out; and step 5, integrating the comparison results of the PAHs-LIF and the Soot-LII, and determining the optimal characterization fuel component capable of characterizing the soot characteristics of the carbon-based fuel in the whole combustion process. The method can explain whether the combustion chemical effect of the fuel can copy the whole process behavior of the real fuel combustion process from the soot precursor to the final soot particles, which is crucial for combustion modeling, emission prediction and optimization design of a power device.

This invention discloses a gas-electric energy synergistically coupled planetary ball mill reactor, comprising a basic planetary ball mill structure and a gas-electric energy synergistic transfer system adapted to the combined revolution and rotation motion of the ball mill jar. The system includes a coaxially arranged gas transfer component and an electric energy transfer component, achieving continuous transfer of gas and electrical energy between different motion reference frames through a two-stage rotating structure. The gas transfer channel and the electric energy transfer channel are arranged in an integrated or combined structure, achieving synchronous transmission while ensuring airtightness and electrical isolation. This allows gas and electrical energy to act on the inside, outside, or adjacent areas of the ball mill jar, thereby enabling the regulation of physical and / or chemical effects during the ball milling process. This device improves process controllability and expands its application range.

The invention provides a brazing type plate heat exchanger which comprises a fixing frame, and a heat exchange body is fixed in the fixing frame. The heat exchange main body is sleeved with the water treatment assembly capable of sliding in the vertical direction, the water treatment assembly comprises a mounting frame, and multiple layers of magnetic treatment parts are arranged on the inner wall of the mounting frame; the magnetic processing part comprises a plurality of magnetic blocks which are uniformly distributed in the mounting frame; and the flow mixing blocks are arranged on the heat exchange plate. According to the technical scheme, the physical effect of the magnetic mixed flow block and the chemical effect of magnetization treatment are combined, formation and deposition of scaling are effectively reduced, the turbulence intensity is increased through movement of the magnetic balls, the thickness of a fluid boundary layer is reduced, the heat exchange efficiency is improved, the problems of blockage and corrosion caused by scaling are solved, the cleaning frequency is reduced, and the service life of the magnetic mixed flow block is prolonged. The equipment operation period is prolonged, the use of chemical cleaning agents is reduced or avoided, and the maintenance cost and the environmental influence are reduced.

Carrier device for receiving and attaching at least one irritant body, in particular with optical, thermal, acoustic or chemical effect, comprising a carrier plate made of metal, plastic or a combination thereof, at least one holding means for fixing the body, a separating or shielding unit, at least three magnetic elements for attachment to metallic surfaces, a closed receptacle for an external control or receiving module and several openings for alternative attachment to non-metallic surfaces.

An electric thruster uses electrical energy to generate and accelerate a propellant to produce thrust through electrostatic, electromagnetic, or electrothermal forces for the purpose of spacecraft propulsion. Exposed thruster surface in acceleration channels, electrodes, grids, cathodes, anodes, nozzle surfaces, or magnet pole pieces are exposed to the energized propellant during operation, including interactions from sputtering, chemical effects and thermal effects. A portion of the surfaces exposed to the energized propellant is covered by a sacrificial liquid.

A high voltage discharge generating a plasma wave front is disposed within a headspace over an oil-containing liquid in order to create various chemical changes within the headspace, and ultimately within the liquid in order to inactivate various microbes, synthesize new chemicals, speed separation of a mixture, and aid in oil extraction. Such a discharge may be repeated at an optimum duration and duty-cycle to maximize the chemical effects of the non-equilibrium plasma at a substantially lower temperature than for an equilibrium plasma.

The invention relates to the technical field of chemical mechanical polishing, and particularly discloses an abrasive-free alkaline copper fine polishing solution for integrated circuit copper wiring and a preparation method of the abrasive-free alkaline copper fine polishing solution. The alkalescent abrasive-free copper fine polishing liquid prepared by utilizing the macromolecular chelating agent has a better dish pit correction effect under the conditions of low pressure, no corrosion inhibitor and no abrasive, and the macromolecular chelating agent can enhance the chemical effect of the polishing liquid and reduce the dosage of the abrasive and the corrosion inhibitor; and the polishing solution does not contain abrasive particles, so that the problems of surface particle pollution, pipeline blockage, surface scratch and the like caused by instability and easiness in agglomeration of the abrasive in the polishing solution are thoroughly solved.

The invention discloses a method for preparing metallic iron from iron ore powder through ultrasonic-assisted leaching-electrolysis, which comprises the following steps: (1) crushing and finely grinding iron ore into iron ore powder, then carrying out sulfuric acid leaching under the ultrasonic-assisted action, and filtering to obtain an iron leachate; (2) reducing Fe < 3 + > in the iron leaching solution into Fe < 2 + > to obtain an iron reduction solution; (3) removing impurities from the iron reduction liquid, and electrolyzing the iron reduction liquid as electrolyte under the action of direct current; and (4) after electrolysis is finished, cleaning and drying the cathode material to obtain metal iron. Electrolysis after auxiliary leaching of the iron ore powder is conducted through the heat effect, the cavitation effect and the chemical effect generated by ultrasonic waves, the iron leaching rate is increased, then the follow-up current efficiency is improved, the method has the advantages of being small in environmental pollution, low in energy consumption, high in current efficiency and the like, and the problems of carbon emission, high cost and the like in the current metal iron preparation process are solved.