86 results about "Chemical dissolution" patented technology

The invention relates to the technical field of mineralogy, in particular to a complex iron mineral distinguishing and quantifying method and an iron mineral content analysis method, which innovatively combines chemical dissolution, automatic mineralogy analysis and a micro-area magnetic verification technology to realize distinguishing and quantifying of complex iron minerals. According to the analysis method, a closed and mutual verification analysis system is formed, acid treatment of carbonate, automatic mineralogy analysis of residual minerals, micro-area magnetic verification correction of misjudgment of maghemite, element surface scanning verification of mineralogy total quantification accuracy and a final calculation result, and closed verification of the total iron content of chemical analysis are combined, and therefore the comprehensive performance of the magnetic separation system is improved. The reliability of a final result is ensured and standardized popularization and application are facilitated.

The invention discloses a modified recycled aggregate preparation method, modified recycled aggregate and concrete.The modified recycled aggregate is prepared through the following steps that waste concrete fragments are soaked in induction liquid, the induction liquid comprises water and calcium hydroxide, the pH of the induction liquid is larger than or equal to 11.5, and wet pretreated fragments are obtained after soaking treatment is finished; blowing tail gas containing CO2 into the induction liquid to reduce the pH value of the induction liquid to 8.5-9.0, standing and waiting for aging for 12 hours, fishing out the fragments, and drying; the concrete comprises water, a gel material and aggregate, the aggregate comprises the modified recycled aggregate, through the synergistic effect of chemical dissolution-carbonization filling, the core problems that the modified recycled aggregate is many in surface impurity, high in water absorption rate and low in strength are solved, and the performance of the modified recycled aggregate is close to that of natural aggregate.

The utility model discloses low-temperature denitration catalyst regeneration equipment, and relates to the technical field of denitration catalyst regeneration, the low-temperature denitration catalyst regeneration equipment comprises a treatment box and a soaking box, a water flow driving mechanism is arranged at the bottom of the treatment box and is used for driving water flow to separate dust particles which are stubborn in adhesion; according to the low-temperature denitration catalyst regeneration equipment, three-dimensional circulating vertical water flow is formed through the water flow driving mechanism, and the low-temperature denitration catalyst regeneration equipment is formed by combining the chemical action of a cleaning agent; according to the low-temperature denitration catalyst regeneration cleaning device, double cleaning of physical washing and chemical dissolution of stubborn dust particles on the surface and in pores of a low-temperature denitration catalyst body is achieved, the problem that dust is difficult to separate in traditional soaking cleaning is effectively solved, and the regeneration separation effect is remarkably improved; accurate movement of the low-temperature denitration catalyst body in the horizontal direction and the vertical direction is achieved, and manual intervention is reduced through automatic operation.

The invention relates to the technical field of photovoltaic intelligent operation and maintenance, in particular to a photovoltaic intelligent monitoring and management system based on the Internet of Things, and the system comprises a data collection module which obtains the original data flow of a sensing array disposed on a photovoltaic panel; the quantitative evaluation module determines a composite fouling adhesion index and a chemical dissolution characteristic index; the efficiency prediction module determines a predicted cleaning success rate based on the composite fouling adhesion index, the chemical dissolution characteristic index, the real-time temperature, the real-time humidity and a preset cleaning strategy control variable; the strategy generation module solves an optimal cleaning strategy corresponding to the minimization of the resource cost function; the model correction module obtains the actual cleaning efficiency after the optimal cleaning strategy is executed, and corrects the efficiency prediction module according to the deviation between the actual cleaning efficiency and the predicted cleaning success rate; according to the invention, the core prediction engine connecting the fouling characteristics and the cleaning strategy is constructed, and the robustness and accuracy of the prediction model are greatly improved.

The invention provides a method for removing a low-temperature oxidation film on the surface of a titanium alloy plate strip and a regeneration method of a used solution, and relates to the technical field of metal surface cleaning. Comprising the steps that firstly, a titanium alloy plate strip is subjected to rolling deformation, cooled and then soaked in a mixed aqueous solution of oxalic acid and sodium chloride at the temperature of 60-80 DEG C, meanwhile, the titanium alloy plate is connected to a positive electrode of a direct-current power source, and the mixed aqueous solution used in the soaking process serves as an electrolyte to remove an oxidation film on the surface of the titanium alloy through electrolysis. A mixed solution of oxalic acid and sodium chloride is adopted as an electrolyte to soak and electrolyze a titanium alloy plate strip, on one hand, the complexing effect of oxalic acid on titanium ions effectively promotes chemical dissolution of an oxide layer, on the other hand, chloride ions assist in stripping the oxide layer through pitting corrosion, and the reducibility of oxalic acid can inhibit excessive corrosion of a matrix. A titanium alloy plate strip is connected to a direct-current power supply, and a dense titanium dioxide oxide layer is rapidly dissolved by means of the synergistic effect of electrolysis. And the solution regeneration method is used, so that the green recycling of the solution can be realized.

The invention relates to the technical field of surface treatment, discloses a dry ice sand blasting-chemical dissolution-ultrasonic collaborative cleaning process for a nano aluminum oxide coating part, and aims to overcome the defects of an existing cleaning technology in the aspects of removing a complex deposited film, protecting the coating integrity and improving the cleaning efficiency. The method comprises the steps of isopropanol soaking treatment, flowing pure water flushing, hot water soaking treatment, carbon dioxide dry ice sand blasting treatment, chemical cleaning of a niflumic acid mixed solution, high-pressure water washing, ultrasonic cleaning and the like. By the adoption of the technical scheme, the efficient, thorough and lossless cleaning effect can be achieved, and the high-standard requirement for cleaning of the nanometer aluminum oxide coating part in the modern industry is met.

The embodiment of the invention provides a self-heating type waste fan blade treatment method. The method comprises the following steps: providing the waste fan blade, and physically crushing the waste fan blade to obtain waste fan blade powder; the waste fan blade powder is burnt and pyrolyzed according to the preset weight ratio; performing vibration screening on the combustion residues to obtain glass fibers and ash, and performing vibration screening on the pyrolysis residues to obtain glass fibers and other solids; other solids are combusted to supply heat for pyrolysis and obtain combustion residues, and the combustion residues are subjected to vibration screening to obtain glass fibers and ash; carrying out chemical dissolution and gradient precipitation on the ash content to obtain a metal precipitate; and combustible materials, glass fibers and metal precipitates are recycled. According to the embodiment of the invention, the waste fan blade can be converted into high-value fuel, glass fiber and metal without extra energy input, solid components in a pyrolysis product are reasonably utilized, the energy utilization rate is increased, and the resource utilization degree of the waste fan blade is greatly improved.

This invention belongs to the field of hydraulic structure analysis technology, specifically disclosing a gravity dam coupling analysis method, system, electronic equipment, and storage medium, including: models describing water flow in concrete, the relationship between water pressure and stress, the dissolution reaction process, and the coupling of ion diffusion with water flow. By acquiring influencing variables, parameters of each model are correlated, and a solubility function considering performance parameters is established and dynamically updated. The solubility function is iteratively trained using experimental data to construct a finite element model, and simulations are performed based on the trained function. Early warnings are generated based on the simulation results to predict the concrete deterioration process and optimize maintenance decisions. It has the following advantages: by coupling multiple models such as water flow, chemical dissolution, and hydraulic fracturing, the long-term deterioration process of concrete under the action of water flow and dissolution is accurately simulated. The introduction of a solubility function and dynamic updating of material parameters, considering time-varying deterioration effects, comprehensively improves the accuracy of deterioration prediction and simulation results.

The application discloses an energy-saving recycling process for polyester-containing waste textiles, and specifically comprises the following steps: step one, pretreatment of the waste textiles: the waste textiles are first cleaned, then put into an automatic feeding mechanism, and cut by a shredding assembly into a collecting box, and flattened by a compacting assembly; step two, chemical dissolution; step three, the decomposed substances are sequentially separated, purified, and re-polymerized to obtain filaments, which are finally stretched and processed to obtain regenerated polyester fibers; the application relates to the technical field of waste recycling. The energy-saving recycling process for polyester-containing waste textiles is provided with a shredding assembly, so that the knife barrels can drive the first cutter and the second cutter to alternately cut the waste textiles while rotating; the first cutters on the two knife barrels cooperate to perform primary cutting and crushing, and the second cutters cooperate to perform secondary cutting and crushing, so that the entangling effect can be achieved.

A treatment fluid is flowed into a wellbore formed in a subterranean formation. The treatment fluid includes sand and a chemical dissolver configured to react with and dissolve wellbore scale. Ultrasound energy is generated within the wellbore. The generated ultrasound energy is applied to the treatment fluid, generating cavitation in the treatment fluid to facilitate dislodging of the wellbore scale. Applying the generated ultrasound energy generates vibrations in the sand, facilitating abrasive and dislodging action on the wellbore scale. The chemical dissolver is contacted with the wellbore scale, causing the chemical dissolver to react with and dissolve the wellbore scale.

The utility model discloses a sample wrapping device for animal fiber chemical dissolution quantitative test, which comprises a heavy plastic part, a filter screen, a closed hook and a light plastic part, the closed hook is adhered to the outer side wall of the light plastic part and is used for hooking the upper end of the filter screen, and the light plastic part is adhered to the lower end of the filter screen. The lower end of the filter screen is adhered to the outer side wall of the heavy plastic part, and the filter screen is used for wrapping a sample; the heavy plastic part is used for dragging the filter screen wrapping the sample to sink under the action of gravity and is positioned at the bottom of the filter screen after sinking; in the dissolving process, the device is in a vertical state under the dragging action of the heavy plastic part and the buoyancy action of the light plastic part, and a sample wrapped by the filter screen is also located in the middle of a dissolved reagent and cannot sink to the bottom of the reagent or float to the surface layer of the reagent, so that the sample is more fully contacted with the reagent, and the dissolving efficiency is higher; and the device is suitable for wide popularization and use.

The invention discloses an efficient planarization flexible polishing method for a tungsten-copper heterogeneous material and a polishing solution adopted by the efficient planarization flexible polishing method. An adopted polishing solution comprises the following raw material components: a non-Newtonian fluid, abrasive particles, an oxidizing agent, a corrosion inhibitor and a PH regulator. In the polishing process, the hardness difference of the tungsten-copper heterogeneous material is regulated and controlled through the chemical effect, specifically, due to the potential difference characteristic of tungsten and copper, hydrogen peroxide serves as an oxidizing agent to be subjected to oxidation reaction with copper preferentially, Cu2O and CuO are generated, Cu2O reacts with a corrosion inhibitor, and a protective layer which can inhibit chemical dissolution of the oxidizing agent to copper and is larger than copper in hardness is generated on the copper surface; part of Cu2O is dissolved into Cu < + > ions, the Cu < + > ions and H2O2 are subjected to a Fenton-like reaction to generate hydroxyl free radicals with strong oxidizing property, and the hydroxyl free radicals make contact with W, so that the W is oxidized to generate tungsten oxide with the hardness smaller than that of tungsten. According to the method, the problems that the hardness difference of the tungsten-copper heterogeneous material is large, and the removal rate of the surface material is difficult to be uniform and consistent are solved, and efficient and planarization polishing of the heterogeneous interface is achieved.

The invention belongs to the technical field of municipal engineering, and discloses cleaning equipment based on road bridge pier studs and a using method, and the cleaning equipment comprises a mounting base which is fixedly mounted on a vehicle body and is used for carrying out transportation or transfer along with the vehicle body; the fixed seat is arranged above the mounting base and is used for mounting equipment; the buffer supporting mechanism is fixedly arranged at the top of the mounting base, is connected with the fixed seat and is used for damping and buffering the fixed seat; the clear water storage and supply mechanism is fixedly arranged at the top of the fixed seat, and is used for synchronously driving annular stirring (a first stirring assembly rotates along the inner wall of the tank body) and axial stirring (a second stirring assembly rotates along a central shaft) by utilizing a driving motor to link double helical gears, so that bidirectional and different-direction mixing of cleaning liquid is realized, and uniform dispersion of chemicals is ensured; the chemical dissolving capacity on stubborn stains such as oil stains and scales is enhanced, and the problem of non-uniform dispersion of traditional one-way stirring is solved.

The invention provides a waste mixture caking and dispersing method based on mechanical shearing in cooperation with a surfactant, and aims to solve the problem of performance degradation caused by caking in RAP regeneration, the method is based on the emulsification effect of the surfactant, and rapid stripping of aged asphalt and old aggregate is realized through pretreatment, mixing stirring and screening processes; the method specifically comprises the steps that RAP agglomerates are preheated and then mixed with a surfactant solution, emulsification and dispersion are completed under the specific temperature and stirring condition, and finally recycled aggregate and recyclable residual emulsion are recycled through screening, the technology breaks through the limitation of traditional mechanical crushing and chemical dissolving, the RAP agglomeration problem is solved, old asphalt is effectively stripped, and the recycling rate of the recycled aggregate is increased. The stability of the regenerated material is enhanced, and the cost is reduced; in addition, the method supports the reuse of the emulsion, reduces the environmental pollution, realizes the recycling of resources, and has important significance for improving the performance of the recycled asphalt pavement and promoting the sustainable development of the road construction industry.

The invention relates to the technical field of pipeline detection, in particular to a stainless steel pipe and an inner hole surface defect detection machine thereof.The stainless steel pipe comprises a pipe wall, and an inner through hole is formed in the center of the pipe wall; the detection machine comprises symmetrically arranged pipeline robots, a zinc sulfide protection window arranged between the two pipeline robots, a cylindrical mounting table mounted at one end of the zinc sulfide protection window, and four jet heads uniformly arranged on one side, facing the zinc sulfide protection window, of the cylindrical mounting table, and the hollow supporting seats are fixedly connected to the other end of the zinc sulfide protection window and are uniformly arranged on one sides of the hollow supporting seats. Viscous oil stains and metal dust on the surface of the zinc sulfide protection window are removed through the synergistic effect that the scraping assembly drives the arc-shaped scraping plate to conduct mechanical scraping, the cleaning assembly drives the cleaning agent to conduct chemical dissolution and the air curtain assembly conducts directional airflow instant drying, and the situation that a residual liquid film interferes with laser and infrared signal paths is avoided; the detection precision and the detection efficiency of the detection assembly are improved.

The invention discloses a textile fabric with regenerated cellulose fibers, and belongs to the technical field of textile industry. Comprising the following components: regenerated cellulose fiber, polyester, fenamidone, deltamethrin, sodium lauryl carboxymethyl imidazoline acetate, a coupling agent I, polypropylene fiber, yttrium oxide, zirconium dioxide, titanium dioxide and a coupling agent II. The regenerated cellulose fibers are fibers prepared from natural cellulose such as wood, cotton linters and bamboos through chemical dissolution and spinning processes, the regenerated cellulose fibers are natural, degradable and more meet the green and environment-friendly requirements, polyester is mixed with fenamidone, deltamethrin and sodium lauryl carboxymethyl imidazoline acetate, and the regenerated cellulose fibers are prepared into the regenerated cellulose fibers. According to the anti-mite textile fabric, the anti-mite components in the polyester are added, so that a layer of anti-mite agent on the surface is washed off and a new anti-mite agent is dissolved out from the inner part to be supplemented in the process of wearing and washing the textile, and a new anti-mite layer is formed on the surface of the textile fabric to play an anti-mite role, so that the textile fabric has a lasting anti-mite effect.

This invention discloses an energy-saving cleaning device for recycling waste plastics, belonging to the field of plastic recycling technology. It includes a first cylinder and a second cylinder. A feed hopper is installed at one end of the first cylinder, and a friction roller is installed inside the first cylinder. In this invention, a spray assembly is installed inside. This design enables the spraying of a degumming agent during the recycling and cleaning of plastic bottles. Simultaneously, the sliding plate moves along a linkage connecting rod, causing the sprayer to oscillate and increasing the spray coverage area. This allows for the complete removal of labels and adhesive residue from the plastic bottle surface through physical friction and chemical dissolution, solving the problem of adhesive residue residue in conventional cleaning. Furthermore, the movement of the sliding plate uses pushing teeth to directionally push the peeled labels and adhesive debris, allowing them to be discharged from one end of the collection tank, preventing debris from accumulating in the second cylinder and causing secondary pollution.

This invention discloses a combined process for restoring reservoir drainage and gas production channels using high-pressure drive and chemical dissolution, relating to the field of efficient oilfield exploitation technology. The process includes: S1, conducting production profile testing and sampling analysis of blockages in the target gas well to determine the type, distribution location, and reservoir physical parameters of the blockages, and preparing a corresponding chemical dissolving agent based on the analysis results. This invention couples the mechanical fracture-creating effect of high-pressure pulsed fluid with the cavitation effect and vibrational mass transfer effect of ultrasound. Based on the initial dissolution of blockages by the chemical dissolving agent, the stress waves generated by the high-pressure pulse expand the reservoir microfractures. Simultaneously, the collapse of microbubbles generated by ultrasound enhances the dissolution reaction rate, and the vibration promotes the dissolving agent's penetration into the micropores, achieving a synergistic effect of chemical dissolution and physical displacement, thoroughly removing blockages from the pore throats, and avoiding secondary precipitation of dissolution products.

The invention discloses a method for preparing a methanol catalyst by using recycled waste copper-based red mud oxygen carriers, and belongs to the technical field of waste oxygen carrier recycling and catalyst preparation. The method comprises the specific steps that the waste copper-based red mud oxygen carrier is subjected to a combined process of microwave fluidized bed roasting and ball-milling enhanced magnetic separation, focused ultrasound-assisted electrochemical dissolution and deposition, Joule thermal shock-assisted acid leaching and alkali precipitation, and cascade recovery of multiple metal resources is achieved; the problem of paid stockpiling or landfill treatment of the waste copper-based red mud oxygen carrier at present is solved, and the defects that when a pure wet method or a pure pyrogenic method is adopted for recycling, metal to be recycled and miscellaneous elements are mutually dissolved, the acid leaching efficiency of oxidation-state metal is low, and waste is caused due to the low utilization rate of part of elements are overcome. According to the method, appropriate metal of the waste copper-based red mud oxygen carrier is used as a raw material for replacing the synthesized copper-based methanol catalyst, the prominent effect that waste metal materials enter a production chain again for additive manufacturing is achieved, and remarkable economic benefits and environmental protection benefits are achieved.

The present application relates to a kind of large volume aperture ratio thin-walled semi-closed complex structure parts of multi-energy field coupling chemical mechanical polishing equipment and method.It includes rack, spindle system, polishing cylinder, multi-field trigger device and numerical control system, spindle system is connected with the clamp for clamping to be polished piece, spindle system is used to adjust the spatial position of spindle, so that to be polished piece enters into polishing cylinder and is immersed in polishing liquid, polishing cylinder is used to contain chemical mechanical polishing liquid and magnetic abrasive, the multi-field trigger device includes at least one of ultrasonic generator, magnetic field generating device, light source, before processing, the entrance of to-be-polished part is added with the preset amount of chemical mechanical polishing liquid and magnetic abrasive and keeps sealed state in polishing process.The present application is mainly removed by chemical dissolution, and the removal of oxide film and passivation film by micro abrasive under the action of fluid pressure is auxiliary, and the surface of part is scratch-free, and the possibility of crack and fatigue source generated by cyclic stress is excluded.

The invention discloses a regeneration method of activated carbon, and belongs to the technical field of adsorbent recovery. Aiming at the problems of high energy consumption, high cost and the like in the traditional treatment of the saturated activated carbon, the invention provides an organic and inorganic synergistic chemical dissolving and filtering method. The preparation method comprises the following specific steps: drying saturated activated carbon at 80-120 DEG C for 3-5 hours, and washing with deionized water to remove soluble impurities; then stirring treatment is carried out at the temperature of 75-85 DEG C by using a 6%-10% NaOH solution, stirring treatment is carried out at the normal temperature by using a 3%-5% HCl solution, and stirring treatment is carried out at the temperature of 55-65 DEG C by using a 90%-95% methanol solution in sequence, so that the adsorbate is dissolved; and finally, washing and drying (at 100 DEG C for 5-6 hours) for multiple times to remove residual reagents. The method is high in regeneration efficiency, low in energy consumption, free of secondary pollution and suitable for industrial continuous production, and the specific surface area of the activated carbon can be recovered to 75%-85% of that of new activated carbon and is increased by 8-9 times.

The present application relates to the technical field of mineralogy, and particularly provides a complex iron mineral distinguishing and quantifying method and an iron mineral content analysis method, which combines chemical dissolution, automatic mineralogy analysis and micro-area magnetic verification technology for the first time to realize the distinguishing and quantifying of complex iron minerals. The analysis method constitutes a closed and mutually checked analysis system, which combines acid treatment of carbonates, automatic mineralogy analysis of residual minerals, micro-area magnetic verification to correct the misjudgment of magnetic hematite, element surface scanning to check the accuracy of overall mineralogy quantification, and final calculation results, and checks the total iron content of chemical analysis to ensure the reliability of the final results and facilitate the standardized popularization and application.

The invention relates to the technical field of high polymer material processing and modification, and discloses a rapid material changing and cleaning method and system for a full-biodegradable multi-phase composite material, and the method comprises the following steps: a data interface module obtains front and back formulas and equipment state data containing a screw wear coefficient; the cleaning decision engine performs reasoning on data characteristics by using a machine learning model to generate a three-section type strategy including physical stripping, chemical dissolution and wetting and precise flushing; the formula execution module controls the feeding and granulating unit to execute the strategy according to the time sequence; and the online monitoring and feedback module judges whether the cleaning is qualified or the circulation is triggered based on the melt spectrum matching degree. A self-adaptive cleaning process is generated by combining formula differences and equipment abrasion states, three-section type time sequence operation is utilized to cooperate with physical shearing and chemical softening effects, and online spectrum closed-loop monitoring is matched, so that the problems that full-biodegradable materials are not thoroughly replaced and cleaned and the materials are wasted are solved, and efficient and automatic intelligent cleaning is achieved.

A wood board washing device, relating to the field of home furnishing product manufacturing, includes a conveyor frame, a wood board conveying assembly, a heating assembly, and a grinding assembly. The wood board conveying assembly includes a conveyor belt disposed inside the conveyor frame; the heating assembly includes a heating hood disposed above the conveyor belt; a spray head is provided at the feed end of the conveyor belt; and the grinding assembly includes a grinding drive motor and a grinding disc disposed above the conveyor belt. This invention uses a conveyor belt to transport wood boards requiring washing. The wood boards enter the bottom of the spray head and are first sprayed with a loosening agent or stain remover to chemically dissolve stains on the wood surface. Then, the heating hood heats the surface of the wood boards, softening the stains. Finally, the grinding disc grinds and cleans the softened stains, thoroughly removing any remaining stains from the wood board surface.

The invention discloses automatic fabric drying and measuring equipment and method, the equipment comprises a pre-drying device, a screening device, a cooling device, a weighing device, a classifying device and a control system, and the pre-drying device and the screening device are sequentially connected along the conveying direction of weighing bottles. And the cooling device conveys the weighing bottle downwards. The weighing device receives the weighing bottles so as to convey the weighing bottles to the classification device below the pre-drying device and the screening device. Samples dried in advance can be screened out in the drying process, so that the dried samples can be cooled and weighed once being dried, the internal space of the drying oven is saved, the drying efficiency is improved, drying of the samples and measurement after drying can be automatically completed, the drying and weighing processes in a chemical dissolution method are simplified, and the drying efficiency is improved. And the data of each weighing bottle is accurately analyzed through the control system, so that technical errors caused by manual operation during large-batch experiments are avoided, the time of experimenters can be saved to the greatest extent, the working efficiency of the experimenters is improved, and the accuracy of test results is improved.

The present invention discloses a seepage test device suitable for different seepage media in grotto temples, comprising a water supply tank, a seepage test box, and a water collecting device. The seepage test box is provided with a fluid inlet and a fluid outlet. The water supply tank is connected to the fluid inlet of the seepage test box, and the water collecting device is connected to the fluid outlet of the seepage test box. The present invention also discloses a seepage test method suitable for different seepage media in grotto temples, wherein fluid is injected into the water supply tank, and the seepage test box and the water collecting device are observed and data is recorded. The method is simple and easy to operate, low in cost, and highly practical. Seepage tests can be carried out on different seepage media and samples of different sizes under different seepage directions and different water heads. The method has a wide range of applications and can test the permeability coefficients of different media, observe the test phenomena at the water outlet, and study the physical scouring and chemical dissolution characteristics of weak media under long-term seepage. The method can be used in the field of water seepage disease prevention and control.

The invention belongs to the technical field of pediatric nursing equipment, and particularly relates to a nasal cavity cleaning device for pediatric nursing, which comprises a bottom plate and an alkali liquor cylinder, four corners of the bottom of the bottom plate move through wheels, the alkali liquor cylinder is welded at the top of the alkali liquor cylinder, and an inner cavity of the alkali liquor cylinder contains alkali liquor. By means of the linkage design that a thread of the inner supporting mechanism drives a connecting rod, flexible self-adaptive attachment of a silica gel layer and the inner wall of the nasal cavity is achieved, and the risk of instrument deviation caused by body position changes of a child patient is remarkably reduced; through a moving mechanism cooperating with bevel gear transmission and an electric push rod and through friction driving of a rotating wheel and the inner wall of the nasal cavity, the cleaning assembly goes deep gradually and is matched with the flexible deformation compensation function of a hose, and it is ensured that the instrument stably moves in a complex nasal cavity channel; through a composite cleaning mechanism of rotation of the flexible brush and spraying of alkali liquor, the flexible brush adjusted by the telescopic rod is in contact with the inner wall of the nasal cavity, the synergistic effect of mechanical scraping and chemical dissolution is formed, stubborn secretions are effectively removed, and the nasal cavity cleaning efficiency is improved.

The utility model discloses sludge stirring equipment, and belongs to the technical field of sludge technologies. The device mainly comprises a supporting frame, and a protective shell is fixedly installed in the supporting frame; the stirring barrel is rotationally connected to the interior of the protective shell, and a sludge inlet pipe is arranged on one side of the stirring barrel and protrudes out of the protective shell; filter holes are formed in the barrel wall of the stirring barrel in a penetrating manner, and stirring blades are mounted on the inner wall of the stirring barrel; the stirring mechanism is arranged on the side, away from the sludge inlet pipe, of the stirring barrel, and the stirring mechanism is used for driving the stirring barrel to rotate; the discharging groove is formed in the lower end of the protective shell; a sealing plug is arranged on the side, close to the mud inlet pipe, of the stirring barrel and is flush with the bottom of the stirring barrel. According to the sludge stirring equipment, large-particle solids in the stirring barrel can be rapidly taken out, a chemical dissolving method is not needed, and the whole stirring barrel does not need to be inclined or inverted.

The invention discloses a method for preparing low-aluminum high-grade iron ore concentrate for iron phosphate production by using pyrite cinder, and belongs to the field of high-value utilization of solid waste resources and preparation of new energy materials. The method sequentially comprises the steps of screening, pre-magnetic separation, ore grinding, two-stage acid leaching, low-intensity magnetic separation and reverse flotation; according to the method, a two-stage acid leaching process is adopted, and deep chemical dissolution of aluminum impurities which are difficult to remove by a traditional physical method is realized through the synergistic complexing effect of inorganic acid and organic acid and assisted by a leaching aid; by combining magnetic separation pre-enrichment and mixed amine cation reverse flotation accurate separation, the pyrite cinder is converted into low-aluminum high-grade iron ore concentrate with the total iron grade larger than or equal to 69% and the aluminum grade smaller than or equal to 0.10%, the iron recovery rate is high, the harsh requirement of an iron phosphate precursor for an iron source is met, and an efficient solution is provided for high-value utilization of bulk solid waste.

This invention discloses a method for evaluating the multiphysics coupling relationship in gas-driven oil extraction. The method includes: acquiring reservoir parameters and constructing a discrete topological space based on a graph data structure in memory; inputting the state vector into a physical information neural network surrogate model to perform phase transition dimensionality reduction calculations, outputting solid phase precipitation and viscosity fields; calculating dynamic real porosity by combining mechanical strain and chemical dissolution; generating a dynamic topology trimming operator based on percolation theory, modifying conductivity properties in the underlying memory to sever the mathematical connectivity of physical blockage zones; assembling a fully implicit Jacobian matrix based on the updated conductivity and iteratively solving it; finally, eliminating isolated dead zone volumes and generating an evaluation index containing a tensor of real sweep efficiency and phase blockage damage index. This invention eliminates the matrix singularity divergence problem, significantly improving simulation computing power and gas-driven evaluation fidelity.