363 results about "Solid phases" patented technology

The invention discloses a CFD-based dust explosion calculation method, and particularly relates to the technical field of dust explosion risk assessment. Firstly, initial dust parameters of a target scene are obtained, then a three-dimensional computational domain is established in combination with a geometric structure, ventilation conditions and obstacle distribution, and a dust deposition area is marked; constructing a gas-solid phase coupled dust explosion solving equation set in the CFD framework; outputting time sequence data of pressure, temperature, speed and dust concentration in the whole explosion process, and generating a risk grade distribution diagram based on the maximum explosion pressure and flame coverage time; according to the invention, the propagation and damage process of dust explosion can be accurately reproduced, the simulation precision and efficiency are improved, and the evaluation result can directly guide protection design and safety management.

The invention relates to the technical field of municipal sludge treatment, in particular to a method for recycling nitrogen and phosphorus elements from municipal sludge. According to the method, the municipal sludge is subjected to hydrothermal carbonization treatment, the treated solid-phase product is dried and ground to a specific particle size, the solid-phase product is subjected to acid leaching under a specific condition to extract the phosphorus element, and then heavy metal and metal elements such as Al and Fe in the acid leaching liquid are removed by adopting strong-acid ion exchange resin and a chemical precipitant, so that the phosphorus element is obtained. And finally, mixing the struvite with a hydrolyzate which is subjected to hydrothermal carbonization treatment and is rich in ammonia nitrogen, and precipitating by adjusting the element proportion and the pH value to obtain a solid-phase product struvite crystal. According to the method, external nitrogen-containing substances do not need to be added, the content of heavy metal in the solid-phase product struvite can be effectively reduced, the recovery rate of phosphorus can reach 93% or above, the recovery rate of ammonia nitrogen can reach 63% or above, the recovery rate of nitrogen and phosphorus is high, energy consumption is low, and the treatment cost is low.

Provided are a method for evaluating reservoir scaling during water flooding, and an application and device thereof. The method comprises: acquiring the ion concentration, cumulative distribution of solid phase particle size counts, and core permeability before displacement; acquiring the multipoint pressure and core permeability of a core, cumulative distribution of solid phase particle size counts, and ion concentration during and / or after the displacement; acquiring ion concentration change, the minimum retained particle size within the core, scaling location, and the degree of core damage; completing evaluation of reservoir scaling during water flooding.

The invention discloses a reprocessable solid-solid phase change material based on dynamic borate bonds and a preparation method of the reprocessable solid-solid phase change material. Based on the mechanism that boric acid ester is subjected to ester exchange during thermal stimulation, a dynamic cross-linking agent containing boric acid ester is adopted for cross-linking a polyurethane prepolymer, polyethylene glycol is cross-linked through chemical bonds, the tensile strength and the elongation at break of the phase change material are improved, and the problem that the phase change material is prone to leakage in the phase change process is solved; besides, borate bonds belong to associated dynamic covalent bonds and can keep the crosslinking density of the material unchanged when ester exchange occurs under thermal stimulation, so that the thermal stability of the material is relatively good; the solid-solid phase change material disclosed by the invention is excellent in mechanical property, has a relatively high enthalpy value, can be reprocessed, and has an application prospect in the fields of thermal management, energy storage, infrared stealth and the like.

The invention discloses a uniform-heat photocatalytic reactor suitable for gas-solid phase reaction, and aims to solve the problems of non-uniform heating of a sample, insufficient contact between a catalyst and reaction gas and generation of a thermocatalytic effect in a metal reaction cavity in the existing reactor. According to the reactor, the nonmetal reaction cavity is adopted, so that thermocatalytic background noise generated by metal materials is avoided, and meanwhile, it is ensured that a sample is uniformly heated in the photocatalytic reaction process. The quartz reaction chamber provided by the invention can ensure full contact between the catalyst and the reaction gas, and improves the catalytic efficiency. The reactor is simple in structure, convenient to operate and suitable for various gas-solid phase photocatalytic reaction experiments. The catalyst is suitable for gas-solid phase catalytic reactions such as ammonia decomposition hydrogen production and carbon dioxide reduction, and is widely applied to the fields of environmental protection and energy conversion.

The invention discloses a phase change sweating cooling non-equilibrium flow heat transfer numerical simulation method which comprises the following steps: after initialization assignment, obtaining physical property parameters of a liquid phase and a gas phase according to a fluid temperature, and calculating a mixing density, a hybrid viscosity, a mixing enthalpy, a convection term coefficient and a diffusion term coefficient; boundary conditions are given to the cooling fluid continuity equation, the cooling fluid momentum equation, the cooling fluid energy equation and the porous framework energy equation; solving a cooling fluid continuity equation and a cooling fluid momentum equation; various items in a cooling fluid energy equation and a porous skeleton energy equation are divided into an unsteady state item, a convection item, a diffusion item and a source item, the four items are expressed by compiling a UDF function and then loaded into a UDS equation in FLUENT, new mixing speed, new mixing pressure intensity, new mixing enthalpy and new solid phase temperature are solved, and the optimal mixing speed, the optimal mixing enthalpy and the optimal solid phase temperature are obtained. The difference value between the initial value and the corresponding initial value in the iteration is judged, if the requirement is met, calculation can be ended, and if not, iteration is conducted again after the solid phase temperature and the fluid saturation are updated.

A reaction system includes a vessel having a gas inlet and a gas outlet, a liquid within the vessel, a solid phase and a gas phase present within the vessel, and at least one liquid separator disposed within the vessel. The liquid has an upper liquid surface within the vessel, and the liquid separator is configured to remove at least a portion of liquid droplets generated based on the gas phase and the solid phase passing through the liquid.

In a case where the target (30) is not supplied, binding through a nucleic acid sequence from the base end on a side of the solid phase surface of the complementary sequence complementary to a part of the nucleic acid sequence of the detection sequence to the other base end is maintained, which causes fluorescence of the fluorescent molecule (11) to be quenched by the quenching molecule (21) close to the fluorescent molecule (11). In a case where the target (30) is supplied, the target is bound to the detection sequence and the binding through the complementary sequence is released, which causes the fluorescent molecule (11) to separate from the quenching molecule (21) and emit fluorescence.

The present invention provides dissimilar material solid phase bonding with which a robust bonded portion of metal materials having different compositions can be formed efficiently. The present invention also provides a dissimilar material solid phase bonded structure having a dissimilar material solid phase bonded portion in which metal materials having different compositions have been bonded together robustly. In the dissimilar material solid phase bonding method according to the present invention, one member is brought into contact with another member to form an interface to be bonded, and newly formed surfaces of the one member and the other member are formed at the interface to be bonded, by means of the application of a bonding load, characterized in that: the one member and the other member have different compositions; the temperature at which the one member and the other member have substantially the same strength is defined as a bonding temperature; and the bonding load at which strength is applied substantially perpendicular to the interface to be bonded is set.

The invention relates to a stirring type particle circulation coupling reactor, a fluidized bed and a particle circulation coupling method, the fluidized bed comprises a reactor, a solid recovery device and a storage tank, a stirring structure is introduced into the reactor, and horizontal shearing force generated by stirring is used for crushing large-size particle agglomerates to prevent hardening of micro-nano particles; meanwhile, the circular flow of the gas medium provides a vertical acting force for the particles, and the coalescence behavior of the gas phase and the solid phase in the reactor is reduced, so that the problem that the micro-nano particles are blocked in the annular space area of the reactor is solved, the fluidization quality is improved, and the circular continuous treatment of the micro-nano particles is realized; the fluidized bed utilizes the built-in guide cylinder to realize circulation, and the circulation direction can be a central airlift type or a central descending type by adjusting the gas flow rate ratio of the guide cylinder to the annular gap area, so that the circulation flow of particles is enhanced, and the fluidization quality of the particles at the bottom of the circulation section is improved.

The invention relates to a method for removing sulfur in sulfur-containing sludge. The method comprises the following specific steps: S1, calcining the sulfur-containing sludge at high temperature; s2, mixing the high-temperature calcined sulfur-containing sludge obtained in the step S1 with a sodium chloride solution, and performing wet ball milling to obtain mixed slurry; s3, filtering the mixed slurry obtained in the step S2, and carrying out solid-liquid separation to obtain a solid phase and a liquid phase; s4, an acid leaching reagent is added into the solid phase obtained in the step S3 for acid leaching, and an acid leaching solution is obtained; and S5, carrying out solid-liquid separation on the acid leaching solution obtained in the step S4 to obtain a solid phase and a liquid phase, and washing and drying the solid phase to obtain sulfur-removed sludge. Compared with the prior art, the method is different from a single ion regulation and control technology through a salt dissolution effect mechanism, so that impurities are more effectively removed.

The invention provides a method and a system for evaluating heavy metal pollution of sediment in a sedimentary environment. The method comprises the following steps: obtaining heavy metal content data of a solid phase and a liquid phase of sediment through multiple layers of sediment samples in a target water body sedimentary area; constructing a migration distribution curve of heavy metals in the bottom mud in different depth layers according to the content data of the heavy metals, extracting enrichment characteristics of the bottom mud heavy metals in vertical distribution according to the migration distribution curve, and generating spatial diffusion distribution of bottom mud heavy metal pollution according to the enrichment characteristics; determining the migration activity coefficient of the heavy metal in the bottom mud in a natural state according to the environmental parameters of the bottom mud, the change trend of the heavy metal concentration gradient in spatial diffusion distribution and the heavy metal form; and evaluating the re-release risk level of heavy metal pollution in the target water body sedimentary area according to the migration activity coefficient. By adopting the scheme, heavy metal pollution assessment can be promoted from static total amount analysis to dynamic behavior risk prediction, so that dynamic quantification of bottom mud heavy metal migration activity and accurate early warning of re-release risk are realized.

The invention discloses a method for determining an optimal gas injection point of gas lift reverse circulation, which comprises the following steps: acquiring underground parameters, and setting a time node t; reasonable grid division is carried out in the drilling tool, divided grid areas (i, j) are obtained, longitudinal i = 1, 2, 3... m, and radial j = 1, 2, 3... n; calculating a Reynolds number and liquid phase velocity distribution of the grid region (i, j); calculating the initial state of the solid phase in the grid region; calculating the parameters by using a unit parameter calculation module; judging whether the time node t is calculated to reach the longitudinal segment m or not; judging whether the solid-phase velocity is smaller than the settling velocity; recording a data output result; according to the method, the limiting position of the gas injection point capable of ensuring that the rock debris is smoothly discharged out of the wellhead is found, and important reference is provided for determining the gas injection point and the gas injection amount.

The present invention discloses a method for low-energy capture of carbon dioxide in air by the solid-phase liquid membrane method, which includes: impregnating an absorbent liquid (lean liquid) on a high specific surface area porous solid-phase material to form a liquid membrane layer, and then fully exposing it in space. Low-concentration CO2 in the air rapidly mass-transfers to the liquid membrane surface through the concentration difference to achieve concentrated adsorption; when the liquid membrane is saturated with CO2 adsorption, it is washed by circulating clear water, so that the liquid membrane with saturated surface adsorption falls off from the solid phase surface to obtain a regenerated liquid (rich liquid) rich in CO2; the lean liquid is repeatedly rinsed to make the lean liquid form a film on the solid phase surface again for the next round of adsorption; the collected rich liquid is heated and desorbed for regeneration to obtain high-purity CO2 gas for storage and subsequent utilization. The air CO2 capture method proposed by the present invention combines the advantages of solid-phase and liquid-phase CO2 absorption. It not only has high carbon capture efficiency and low energy consumption, but also has simple operation and is easy to be popularized on a large scale, and has good application prospects.

The invention provides a high-filling particle viscous fluid mixed heat generation and transfer multi-scale simulation method and system, and belongs to the technical field of multiphase flow numerical simulation and heat transfer and friction heat generation coupling calculation. A uniform flow-heat generation-heat transfer coupling solution is constructed under a double-fluid model and a KTGF framework; a drag force model more suitable for a dense particle system is introduced in an interphase momentum exchange link; a BVK drag force model is adopted, and dynamic calculation of an interphase exchange coefficient is realized in a solver through a user-defined function; therefore, the prediction consistency of the solid-phase volume fraction distribution and the relative slip velocity under the high filling condition is improved; particle phase dissipation heat generation, solid-liquid interface friction heat generation and particle-wall surface friction heat generation are introduced as controllable heat source items, and are coupled to a liquid phase and particle phase energy equation according to a set heat distribution coefficient, so that the problem that friction related heat sources are difficult to accurately characterize when only software built-in options are relied on is solved.

The invention provides a method, system and improving method for determining the solid-phase carbon sequestration amount in alkaline solid waste liquid-phase mineralization carbon sequestration, and the determining method comprises the following steps: obtaining the inlet gas carbon dioxide concentration of a bubbling bed reactor, the molar flow of carbon dioxide at an inlet, the carbon dioxide concentration at an outlet and a first duration; wherein the first duration is the duration of the conductivity of the alkaline solid waste slurry from the beginning of the reaction to the lowest point, so as to determine the solid-phase carbon sequestration amount of carbon dioxide in unit time in the bubbling bed reactor, and further determine the total solid-phase carbon sequestration amount in the bubbling bed reactor within the first duration. According to the method, the solid-phase carbon sequestration amount of the carbon dioxide is calculated, and then the reaction working condition with the maximum solid-phase carbon sequestration amount of the carbon dioxide can be selected through comparison of the calculated data, so that the solid-phase carbon sequestration amount is increased.

The invention discloses a device for testing migration rules of hydrates and sulfur particles in a throttling process pipeline, and belongs to the technical field of natural gas hydrate testing. The device comprises a natural gas filling system, a sulfur particle filling system, a water filling system, a hydrate preparation system, a gas-liquid-solid phase separate transportation system, a water bath temperature control system, a transparent test system, a separation circulation system, a particle tracing image velocity measurement system and a recovery unit. According to the device, precise filling of sulfur particles in the pipeline under pressure is realized by utilizing differential pressure boosting and screw-in feeding of the screw rod; rapid migration of hydrates and sulfur particles in upstream and downstream pipelines of the multi-stage throttle valve is simulated by utilizing a two-stage throttle process design; the particle tracing image velocity measurement system can be used for testing the size morphology, migration trajectory, particle axial displacement velocity and deposition velocity of the hydrate, the sulfur particles and the agglomerates of the hydrate, the sulfur particles and the agglomerates of the hydrate and the sulfur particles. The device not only supports a one-time passing test and a circular flow test of a mixture of hydrate and sulfur particles, but also supports a water or gas-dominated hydrate particle migration law test.

The invention discloses environmental particulate spherical powder and a preparation method thereof. The preparation method comprises the following steps: selecting artificially synthesized CMAS powder or natural solid particles as a preparation raw material; the preparation method comprises the following steps: sequentially carrying out ball milling, high-temperature melting, quenching and solid-phase sintering on a CMAS powder raw material to obtain a crystalline CMAS block; the method comprises the following steps: carrying out ball milling on natural solid particles or crystalline CMAS blocks to obtain fine particle powder, and obtaining a high-temperature melting characteristic curve of the fine particle powder; preparing the fine particle powder into slurry, and carrying out spray granulation to obtain powder particles with a target size; the powder particles are subjected to low-temperature sintering to remove the binder, then high-temperature sintering densification treatment is conducted, the environmental particulate matter spherical powder is obtained, and the densification treatment temperature is determined based on a high-temperature melting characteristic curve. The prepared powder has excellent flowability and compactness, the particle size range of the powder is controlled to be 20-500 microns, the spherical powder with concentrated particle size distribution can be obtained after screening, and a high-quality and standardized material can be provided for research of aero-engine related thermal protection technologies.

The invention relates to a tail flame polarization state simulation method and device considering solid-phase particle size distribution, a medium and equipment. The method comprises the following steps: constructing a particle size distribution function; determining a cumulative distribution function based on the particle size distribution function, discretizing the cumulative distribution function, and calculating the representative particle size of each region; optical factors of the solid-phase particles in all the areas are calculated; calculating optical parameters of the particle swarm; taking each representative particle size and number density as particle phase input of an N-S equation of fluid mechanics to obtain two-phase flow tail flame flow field data and nozzle outlet data under different particle size distribution conditions; the method comprises the following steps of: taking a plurality of grids as input of a tail flame polarization radiation transfer model, calculating each solid phase parameter of each grid, taking an extinction coefficient and a single scattering coefficient of each cell as input of a two-phase flow tail flame vector radiation transfer equation, and outputting a polarization state of the tail flame. And the tail flame polarized radiation closer to the reality is obtained through simulation.

The invention discloses a method for preparing a sulfide solid electrolyte by a solid phase method, which comprises the following steps: carrying out ball milling on raw materials such as a lithium sulfur compound and phosphide under the protection of inert gas by adopting a mode of combining mechanical ball milling with heat treatment, and then carrying out heat treatment at a certain temperature to obtain the sulfide solid electrolyte. The method can effectively control the particle size and crystallinity of the material and improve the ionic conductivity, thereby enhancing the charge-discharge performance of the battery.

The invention discloses an underground coal mine compressed air drilling orifice rotary sealing blowout prevention dust removal automatic deslagging system which comprises an orifice pipe, an orifice four-way joint, a first sealing assembly, a second sealing assembly, a filtering type negative pressure bag and an automatic deslagging device. During drilling construction, the first sealing assembly and the second sealing assembly alternately act, sealing under the working conditions of axial movement and radial rotation of the drill rod is achieved, and reciprocating alternate sealing is conducted till drilling is conducted to the designed hole depth; meanwhile, the filtering type negative pressure bag achieves filtering type dust removal and gas pre-extraction of drilling dust and gas, and the automatic slag discharging device can automatically transfer drilling slag in a full-closed mode. Rotary sealing in the whole drilling process can be achieved, a large amount of dust is prevented from gushing out to pollute the operation environment and gas is prevented from gushing out to cause overrun accidents in the drilling process, meanwhile, solid-phase particles in the dust are effectively separated in the drilling process, the solid-phase particles are prevented from entering a main negative-pressure pipeline to block the pipeline, full-closed automatic transfer of drilling slag is achieved, and the working efficiency is improved. The automation level is improved, and the labor intensity of operators is reduced.

The invention provides a semi-analytical MPM-DEM coupling numerical simulation method for interaction of debris flow and a structure, and relates to the field of geotechnical engineering disaster simulation. Taking the fine-grain slurry as a continuous medium, and discretizing by adopting MPM; meanwhile, spherical particles and clustered particles serve as solid phases, and DEM modeling is adopted; structures and boundaries are embedded into the computational domain in the form of rigid walls. Through grid-particle information exchange and two-way transmission of particle-grid coupling force, synchronous solution of fluid-solid multiphase coupling is realized. The fluid-solid contact force adopts a semi-analysis mode; the DEM particles and the DEM particle-wall contact are accurately calculated on the basis of a Hertz-Mindlin model, and the DEM particle-wall contact is accurately calculated on the basis of a Hertz-Mindlin model. According to the method, collaborative collision, blockage and impact mechanisms of block stones and floating woods in debris flow are truly represented, and the three-dimensional large-scale situation of million-level fluid mass points and million-level particles is simulated. The simulation result can output key indexes such as the stress time history, the impact peak value and the blockage rate of the structure, and a reliable numerical basis is provided for debris flow protection.

The invention relates to the technical field of oilfield development, in particular to an oil-water transition layer characterization method based on composition and characteristic analysis, which comprises the following steps: acquiring the water content of an oil-water transition layer; obtaining an oil phase composition of the oil-water transition layer; obtaining the solid phase composition of the oil-water transition layer; obtaining stability characteristics of the oil-water transition layer; obtaining the electric removal current and conductivity of the oil-water transition layer; the emulsification degree of the oil-water transition layer is characterized by the water content, the oil phase composition, the solid phase composition, the stability characteristic electric removal current and the conductivity. According to the method, a three-phase detection and characteristic analysis combined characterization method is adopted, and the formed characterization standard can provide a scientific guidance basis for the research direction of the treatment agent for the oil-water transition layer of the oil field.

The present invention relates to a device for fractionating a suspension sample and to uses of such device. Furthermore, the present invention also relates to a method of fractionating a suspension sample into a liquid phase and a solid phase. The present invention also relates to a device and method for separating a sample comprising a solvent and two or more components having different molecular weights and being dissolved in said solvent, into said two or more components.

The invention discloses a recoverable high-enthalpy-value solid-solid phase change material and a preparation method thereof. Solid phase constraint of a liquid phase change material is achieved through a topological entanglement effect generated by a hydrogen bond network and polymer macromolecules. The coupling effect of the two limits the movement between low-molecular-weight phase change material molecules at the phase change temperature, and high-temperature solid-solid phase transformation is achieved. The solid-solid phase change material prepared by the method has a high enthalpy value and also has recoverability. In addition, due to the excellent light absorption capacity of the graphene oxide sheet, the graphene oxide sheet has a potential excellent function in the aspect of solar photo-thermal conversion.

The present invention provides a method for evaluating reservoir scaling during water injection, and its application and device. The evaluation method includes: obtaining the ion concentration and cumulative distribution of solid phase particle size before experimental fluid displacement, and the core permeability of the experimental core before displacement; displacing the experimental core with the experimental fluid, obtaining the multi-point pressure and core permeability of the experimental core during and / or after displacement, the cumulative distribution of solid phase particle size after displacement corresponding to at least two cumulative displacement flow rates, and the ion concentration after displacement; obtaining the change in ion concentration based on the ion concentration before and after displacement; obtaining the minimum retained particle size inside the core based on the cumulative distribution of solid phase particle size before and after displacement; obtaining the scaling location based on the multi-point pressure; obtaining the degree of core damage based on the core permeability before and after displacement; and completing the evaluation of reservoir scaling during water injection. The present invention also provides the application and evaluation device of the above evaluation method.

The invention relates to the technical field of chemical machinery, in particular to automatic filtering and drying equipment and method.The automatic filtering and drying equipment comprises a rotary cylinder capable of working in multiple postures, double-layer sleeve fluid conveying assemblies are arranged at the two ends of the cylinder respectively, one end assembly is specially used for liquid phase conveying, central pipe liquid feeding and interlayer liquid discharging, and the other end assembly is specially used for gas / solid phase conveying; the central pipe discharges solid and the interlayer exhausts air, so that thorough isolation of a high-risk liquid phase and a gas / solid phase pipeline is realized on a physical structure, a follow-up heating and control system, an airflow conveying and discharging mechanism and a built-in crushing mechanism are integrated, and full-process automatic closed operation of inverted filtering, rotary drying and upright discharging is realized. The problems of liquid crystallization blockage, sealing failure leakage, danger of manual operation and the like caused by mixed use of pipelines of traditional equipment are fundamentally solved, and the device is particularly suitable for safe and efficient production of lithium hexafluorophosphate and other materials which are high in toxicity, high in corrosion, flammable and explosive, easy to deliquesce and cannot be in contact with air.

The utility model discloses a gas-liquid-powder separation device, and relates to the technical field of gas-liquid-powder separation equipment, in particular to the gas-liquid-powder separation device, which comprises a first tank body, a second tank body and a third tank body which are in a horizontal cylindrical shape, and the first tank body, the second tank body and the third tank body are fixedly mounted in sequence from bottom to top; a mixture inflow pipe is fixedly mounted on the second tank body and is communicated with the second tank body; mixed materials produced in a gas field enter the second tank body through the mixture inflow pipe, a liquid phase and a solid phase flow into the first tank body through the flow guide pipe, the liquid phase and the solid phase are separated in the first tank body, the solid phase falls into the sand accumulation drawer, the liquid phase is discharged through the liquid discharging pipe, and therefore liquid-solid separation is achieved. Gas, dust and part of water vapor flow into the third tank body through the gas guide pipe, the dust is filtered by the gas filter element in the third tank body, and the filtered gas is discharged through the gas discharge pipe, so that the purpose of gas dust removal is achieved.

The invention provides an energy pile space backfilling method based on a high thermal conductivity shaped phase change backfill material. n-heptadecane is used as a phase change material, and an olefin block copolymer is used to shape the phase change material to form a stable solid phase change material. The thermal conductivity of the solid phase change material is improved by adding graphite powder. The formed phase change backfill material has high heat transfer effect, high latent heat and good stability. In addition, a suitable amount of liquid n-heptadecane is filled in the block backfill material stacked inside the energy pile structure to ensure that the liquid n-heptadecane can be uniformly filled in the pore structure between the blocks. While ensuring heat conduction and thermal stability, the block material will not be squeezed or damaged due to excessive volume change in the phase change process, thereby ensuring the structural stability of the phase change backfill material. In addition, the material filled in the energy pile has excellent heat conduction and thermal stability and can effectively play a role.

The invention relates to the technical field of metal material service behavior testing, in particular to a stress corrosion testing device and a stress corrosion testing method for a solid-phase additive manufacturing joint micro-size sample. The device comprises a micro clamping module for realizing automatic centering and stable clamping; the micro-volume corrosion tank with the volume of 1-20 mL is used for forming a local corrosion environment and can be observed in situ; the external medium circulation and environment control system is used for providing liquid, gas or liquid / gas combined media and rapidly switching the environment; and the loading detection system is used for loading and recording force-displacement data according to a constant strain rate. The gauge length section of the sample is arranged in the corrosion tank, and the two ends are arranged on the clamping module and are accurately centered through the positioning groove and the pin. The micro-volume corrosion tank can quickly establish a corrosion environment, and the external medium circulation and environment control system can regulate and control the temperature, the flow velocity and the atmosphere, so that quick switching of different media is realized. According to the invention, high-precision stress corrosion testing can be realized on a micro additive interface, and the local area sensitivity evaluation capability is improved.