30results about How to "Avoid poisoning" patented technology

The utility model discloses an ammonia gas stable combustion device which comprises a flame generator, an ammonia gas adding device and a pure oxygen adding device, the flame generator enables ignition fuel and oxygen to be mixed and combusted to generate flames, the ammonia gas adding device is used for adding ammonia gas to the outer side of the flames, the pure oxygen adding device is used for adding pure oxygen to the outer side of the ammonia gas, and the ammonia gas is stably combusted in a high-temperature area of the flames under the oxygen-enriched condition. According to the device, ignition fuel and oxygen are mixed and combusted to generate flames, the temperature of a high-temperature area of the flames reaches 2000 DEG C, ammonia gas and pure oxygen are heated and ignited, and the ammonia gas is high in combustion speed and not prone to flameout under the oxygen-enriched working condition, so that the ammonia gas can be stably combusted in the high-temperature area of the flames under the oxygen-enriched condition.

A flue gas desulfurization device of desulfurization absorption tower external crystallization, comprising the following units, a flue gas desulfurization unit: comprising a main flue gas duct subunit, a desulfurization absorption subunit; a flue gas evaporation crystallization unit: comprising a secondary flue gas duct subunit, an evaporation crystallization subunit and a solid-liquid separation subunit connected in sequence; the desulfurization absorption subunit comprises a desulfurization absorption tower, a circulating pump, a circulating tank, a desulfurizer supply device, a process water supply device and an oxidizing air supply device; the main flue gas duct subunit comprises a pipeline connected to the desulfurization absorption tower as an inlet and outlet flue; a boiler induced draft fan and a damper are connected in series on the pipeline; one pipeline of the main flue gas is connected to the desulfurization absorption tower, and another pipeline is connected in parallel to a crystallization booster fan and a flue which is connected to the evaporation crystallization subunit; the evaporation crystallization subunit is additionally provided with two pipelines connected to the desulfurization absorption tower, one of which is used to introduce a desulfurization byproduct solution from the desulfurization absorption tower, and the other of which is used to return low-temperature flue gas to the desulfurization absorption tower.

The invention belongs to the technical field of electrochemical oxygen reduction, and relates to a preparation method and application of a high-dispersion mesoporous carbon sphere loaded nano platinum-cobalt intermetallic compound electrocatalytic oxygen reduction material, a high-dispersion mesoporous carbon sphere precursor is firstly prepared, then the high-dispersion mesoporous carbon sphere precursor is subjected to high-temperature carbonization treatment to obtain high-dispersion mesoporous carbon spheres, and the high-dispersion mesoporous carbon spheres are subjected to high-temperature carbonization treatment to obtain the high-dispersion mesoporous carbon sphere loaded nano platinum-cobalt intermetallic compound electrocatalytic oxygen reduction material. Then, mesoporous carbon spheres loaded with platinum-cobalt intermetallic compound precursors are prepared on the basis of the obtained high-dispersion mesoporous carbon spheres, finally, the mesoporous carbon spheres are subjected to high-temperature heat treatment, and finally the high-dispersion mesoporous carbon sphere loaded nano platinum-cobalt intermetallic compound electro-catalytic oxygen reduction material is prepared. According to the invention, the high specific surface area and regular pore structure of the mesoporous carbon spheres are utilized to realize high dispersion and confinement of the platinum-cobalt precursor, and intermetallic compound nanoparticles with uniform size and uniform distribution are formed through heat treatment. The obtained material has high precious metal utilization rate and excellent stability, the synthesis method is simple, operation is easy and convenient, repeatability is high, and large-scale production is easy to achieve.

The application discloses a carbon-silicon composite catalyst, a preparation method thereof and application of the catalyst in preparation of aromatic hydrocarbons through catalytic pyrolysis of kitchen waste, and belongs to the technical field of solid waste resource utilization and catalytic conversion. The catalyst takes ZSM-5@SBA-15 core-shell structure composite molecular sieve as a carrier, loads nano NiO active components, and coats N-doped carbon layers on the surface. The catalyst is prepared through hydrothermal synthesis of the core-shell carrier, impregnation of the metal loading, and calcination of the carbon layer in an inert atmosphere. The pretreated kitchen waste is mixed with the catalyst, and catalytic pyrolysis is carried out in an inert atmosphere at normal pressure, so that bio-oil rich in aromatic hydrocarbons (BTX) can be prepared with high selectivity. The content of the aromatic hydrocarbons in the obtained bio-oil is greater than or equal to 72%, and the content of BTX in the total aromatic hydrocarbons is greater than or equal to 58%, so that high-quality raw materials can be provided for subsequent preparation of bio-jet fuel components and fine chemicals. The application has simple process, environmental and economic benefits, and wide application prospect.

The application discloses a phosphorus-doped porous carbon metal-free oxygen reduction catalyst and a preparation method and application thereof, and belongs to the field of electrochemical catalytic materials. In the application, alizarin and tetraol diphosphite are dissolved in anhydrous ethanol to perform chemical doping, a porous brown precursor dry gel is obtained through a sol-gel method, and then the phosphorus-doped porous carbon metal-free oxygen reduction catalyst is obtained after carbonization under an inert atmosphere. The phosphorus doping can effectively regulate the electron concentration of adjacent carbon atoms, reduce the energy barrier, and thus promote the catalytic reaction. The porous structure is beneficial to exposing more active sites. The raw materials used in the application are cheap, the preparation method is simple, and the application is easy to produce on a large scale. Compared with commercial platinum-carbon, the prepared catalyst has good activity and shows more excellent methanol tolerance.

This application relates to the field of catalyst technology, disclosing an electron-rich Pd nanocatalyst, its preparation method, and its application. The electron-rich Pd nanocatalyst comprises a sheet-like Mg(OH)₂ support and Pd nanoparticles uniformly loaded on the sheet-like Mg(OH)₂ support; wherein the thickness of the Mg(OH)₂ sheet is less than 2 nm; and the average particle size of the Pd nanoparticles is less than 4 nm. The preparation method includes dispersing the Mg(OH)₂ support in water, sequentially adding a palladium source and urea, refluxing at 55-65°C to obtain a precursor solution; adding a reducing agent to the precursor solution to carry out the reaction, collecting the solid deposit, washing, and drying to obtain the final product. This application, by regulating the electronic structure of the Pd nanoparticles, significantly increases the electron density on their surface, increasing the repulsion of reaction products, weakening the adsorption of reaction products on the catalyst surface, avoiding poisoning of the catalyst active sites, and improving the reactivity and selectivity of the Pd nanocatalyst for the hydrogenation of nitrile compounds at low temperatures.

The application discloses a kind of cattle and sheep lick brick auxiliary feeding device, which is characterized in that the side of the protective shell is open, the box door is placed in the open side of the protective shell, the side edge of the box door is hinged to the protective shell, a door handle is placed on the box door, two fixed clamps are placed on the other side of the protective shell, a fixed groove is opened on the protective clamp, an inner fixed shell is located in the protective shell, a distance is placed between the outer side of the inner fixed shell and the inner side of the protective shell, the inner fixed shell is connected to the inner wall of the protective shell through multiple connecting columns, a moisture-proof layer is placed on the inner wall of the inner fixed shell, a sliding groove is opened on the two side walls of the inner fixed shell respectively, a pressing plate is placed in the inner fixed shell, sliding blocks are placed at the two ends of the pressing plate respectively, the two sliding blocks are placed in the two sliding grooves respectively, and springs are placed on the pressing plate.

This invention relates to the field of data security technology and provides an artificial intelligence-based data security tracing method and system. The method collects multi-dimensional operational data of industrial robots during continuous production, including continuous physical parameter sequences and discrete action command sequences; establishes a dynamic sliding window baseline model to track slow parameter drift and constructs a normal action pattern library to record high-frequency action sub-sequences; monitors baseline deviation events and rare pattern events in real time, cross-validates these two types of events on the timeline, and marks overlapping time windows that point to the same robot as suspicious contamination periods, tracing the data injection source in reverse; excludes data within suspicious contamination periods from the baseline update queue, and stores rare action sub-sequences in a blacklist pattern library. This invention can adapt to changes in equipment status, integrate multi-dimensional data cross-validation, accurately identify and trace data contamination attacks, and ensure data security in continuous industrial production.

The invention provides a coke oven flue gas purification system and method. The purification system comprises a pretreatment unit, a heat storage incineration unit and an SCR treatment unit which are sequentially arranged. The pretreatment unit is used for carrying out desulfurization treatment and dust removal treatment on coke oven flue gas to obtain first flue gas and conveying the first flue gas to the heat storage incineration unit; the heat storage incineration unit is used for carrying out preheating treatment, oxidation treatment and heat recovery treatment on the first flue gas to obtain second flue gas; and the SCR treatment unit is used for carrying out SCR denitration treatment on the second flue gas to obtain purified flue gas. According to the coke oven flue gas purification system and method, volatile organic compounds (such as NMHC), CO and other combustible substances in flue gas are efficiently oxidized and decomposed through the heat storage incineration unit, the flue gas is heated through heat generated by oxidative decomposition, and the consumption of supplemented coal gas is greatly reduced. The requirement that the NMHC emission concentration is not higher than 100 mg / Nm < 3 > can be stably met, and the energy consumption cost of the system can be reduced.

This invention belongs to the field of aluminum alloy materials, specifically relating to a high-temperature resistant aluminum alloy, its preparation method, and its applications. The alloy comprises the following components by mass fraction: Cu 2.0-4.0%, Si 8.5-11.5%, Zn 0.5-1.5%, Mn 0.3-0.6%, Mg 0.3-0.8%, Fe≤0.45%, Sr 0.010-0.045%, Cr 0.3-1.0%, Ti 0.06-0.25%, (La+Ce) 0.05-0.6%, with the balance being Al and impurities; wherein the total impurity content is not greater than 0.25%, the Si / Cu mass fraction ratio is 4-5.5, the Cu / Mg mass fraction ratio is 4-7, the sum of the mass fractions of Cu+Zn+Mg is 3-5, and the Cu / Cr mass fraction ratio is 3-11. The aluminum alloy components disclosed in this invention, after being formed and subjected to T5 heat treatment, exhibit tensile strength of 350-400 MPa, yield strength of 240-300 MPa, elongation after fracture of 3.0-5.0%, and high-temperature strength exceeding 230 MPa in a working environment at 250°C, which is superior to the performance of conventional high-strength and tough aluminum alloy formed components.

This invention discloses a method for processing the traditional Chinese medicine Pinellia ternata. The method involves processing the raw Pinellia ternata in a phosphate solution under sealed conditions, followed by slicing into thick pieces and drying to obtain the processed product. The medicinal material is Pinellia ternata or Arisaema heterophyllum. The method of this invention uses phosphate solution to soak Pinellia ternata, which significantly reduces its irritant properties. Toxicological experiments have shown that the processed Pinellia ternata is non-irritating and does not cause a numbing sensation on the tongue. This invention does not use alum, thus avoiding the use of residual Al from alum as a processing excipient in pharmacopoeia methods. 3+ The toxicity to the human nervous system is minimal, ensuring safe and effective clinical use. Compared with traditional processing methods, phosphate-processed Pinellia ternata has the advantages of quantifiable process indicators, simple operation, and no introduction of hazards. It provides a reference for the processing technology of phosphate-processed Pinellia ternata, lays the foundation for the quality stability of phosphate-processed Pinellia ternata, and ensures the safety and efficacy of traditional Chinese medicine.

The invention discloses a graded regeneration method and application of saturated denitrification resin, and belongs to the field of environmental protection and water treatment. The graded regeneration method of the saturated denitrification resin comprises the following steps: S1, flushing the saturated denitrification resin with 0.3 wt%-2wt% of a first regenerant, performing primary regeneration, and collecting to obtain primary regeneration liquid; s2, flushing the denitrification resin subjected to primary regeneration by using 3.5 wt%-6wt% of a second regenerant, performing secondary regeneration, and collecting to obtain a secondary regeneration solution; and S3, flushing the denitrification resin subjected to secondary regeneration by using a flushing agent to obtain the denitrification resin subjected to regeneration. According to the invention, the regenerant with different concentrations is used for graded regeneration to respectively obtain the first-stage regenerated liquid mainly containing high-concentration sulfate and the second-stage regenerated liquid mainly containing high-concentration nitrate and almost containing no sulfate, so that the effects of separating and enriching the sulfate and the nitrate are realized; the recovery of sulfate and the anaerobic denitrification treatment of nitrate are facilitated. The method is simple in process, reasonable in design and easy to industrially popularize.

The utility model discloses a kind of water vending machines, it is related to water vending machine technical field, comprising: soft water purification system, it at least includes by pp filter element, activated carbon filter element and RO filter element;Hydrogen-rich system, it includes low TDS pure water tank and PEM electrolyzer, resin filter element is connected in series in the pipe line fixedly communicated between the water outlet of low TDS pure water tank and the inlet and outlet of PEM electrolyzer;Wherein, the water inlet of low TDS pure water tank is connected with the water outlet of RO filter element;The oxygen outlet of PEM electrolyzer is fixedly communicated with the inlet of low TDS pure water tank;It further includes hydrogen mixing jet device.The utility model is in PEM electrolyzer water inlet end series resin filter element, depth adsorption softening after residual ion and organic impurity, from source head, block pollutant contact electrode, guarantee electrolytic cell long-term efficient operation, second electrolysis generated pure hydrogen is transported to hydrogen mixing jet device by independent pipe line, with multi-stage purification after soft water high-efficiency fusion, prevent secondary pollution risk.

This invention discloses a method for the continuous hydrogenation synthesis of GalNAc molecules. The invention provides a method for synthesizing a compound as shown in Formula I, comprising the following steps: in a flowing hydrogenation reactor, in the presence of a catalyst, reactant A undergoes a hydrogenation reaction with hydrogen to generate a compound as shown in Formula I; wherein reactant A includes a solvent, a compound as shown in Formula II, and an acid. The synthesis method provided by this invention significantly reduces the formation of Ac-depleted impurities, improves the purity and yield of the product, and also extends catalyst lifetime, thereby partially reducing time costs, catalyst costs, and greatly reducing safety risks during the production process.

The invention relates to the technical field of haematococcus culture, in particular to a chelating agent-based haematococcus culture solution heavy metal passivation device which comprises a buffer tank for collecting a culture solution, a power box arranged below the bottom of the buffer tank and a stirring barrel arranged in the buffer tank, a plurality of feeding barrels are arranged at the top of the buffer tank and are configured into an acid and alkali liquor feeding barrel, a chelating agent feeding barrel and a flocculating agent feeding barrel; the device further comprises a central control unit, and the central control unit controls the amount of the chelating agent released by the chelating agent feeding barrel according to detection information of the heavy metal concentration sensor. By arranging the integrated buffer tank and the step-by-step adding system, pretreatment and precise reaction of the culture solution are completed, and the effect of preventing heavy metal poison from the source is achieved; by arranging a linkage mechanism of the detection tank and the return pipeline, the technical effect of terminal verification and guarantee of the effluent quality is achieved.

The present application relates to hydrogen purification technical field, a kind of high-efficiency stable palladium tube hydrogen purifier, comprising: shell assembly, shell assembly is made of shell, heat preservation layer and inner container, and heat preservation layer is filled in the gap between shell and inner container, the middle of one end of inner container is fixed with the original gas inlet pipe extending out of shell, and the one end of original gas inlet pipe is fixedly installed with inlet valve;Feed pretreatment component, feed pretreatment component is set in the one end of inner container close to original gas inlet pipe, and its top extends to the top side of shell;End cap, end cap is fixedly installed in the one end of shell away from original gas inlet pipe, and the middle of end cap is fixed with hydrogen outlet pipe.The present application realizes the multistage depth purification of hydrogen, greatly improves the recovery rate and purity of hydrogen after purification, simultaneously, high-efficiency breaks the laminar boundary layer formed by raw material gas on the surface of palladium tube body, reduces the resistance of hydrogen molecules from raw material gas main body to spread to the surface of palladium tube, and realizes the double energy saving of tail gas waste heat recovery and tail gas kinetic energy utilization.

The invention relates to a testing device and a testing method for a water electrolysis membrane electrode. The testing device comprises an anode collector plate, a cathode collector plate and a reference electrode, the anode collector plate and the cathode collector plate are oppositely arranged and are used for clamping a membrane electrode to be detected; pore channels are independently formed in the anode collector plate and the cathode collector plate respectively, and each pore channel comprises a first opening facing a transmission layer in the membrane electrode to be detected and a second opening extending to the outer edge of the collector plate; the pore channel comprises a first section close to the first opening and a second section far away from the first opening, a perfluorosulfonic acid column is arranged in the first section, and a perfluorosulfonic acid pipe is arranged in the second section; the reference electrode is connected with the second opening through an external pipeline, and the external pipeline is filled with an acidic electrolyte; a valve is arranged on the external pipeline and is used for controlling the connection and disconnection of a connection passage between the reference electrode and the pore passage. The device provided by the invention forms a three-electrode test system, can detect the electrolytic overpotential of the cathode and anode catalyst layers in the membrane electrode in situ, and independently obtains the electrochemical parameters of the cathode and the anode.

The invention relates to the technical field of carbon dioxide electrochemical conversion, in particular to a solid rust remover composition, a preparation method, a protection method and application. According to the solid rust remover composition provided by the invention, the tapioca flour, the alginate, the acid-soluble chitosan, the wheat protein and the phosphoric acid are subjected to chemical reaction crosslinking to finally form the solid rust remover. The solid rust remover disclosed by the invention is more convenient and simpler to apply, and can directly adsorb and remove metal rust in a solution. The preparation method of the solid rust remover composition provided by the invention is simple. According to the application of the solid rust remover composition in protection of the carbon dioxide electrochemical conversion catalyst and the protection method provided by the invention, the solid rust remover provided by the invention can prevent rust from poisoning the catalyst only by putting the solid rust remover into a position before the catalyst enters an electrolyte pipeline, and the solid rust remover composition is simple to apply and good in effect.

The application discloses a soilless culture method using ore powder sintering matrix, and comprises the following steps: providing an ore powder sintering hole disc; placing plant roots in holes, covering the plant roots with ore powder sintering particles to fix the plant roots; placing the bottom of the ore powder sintering hole disc in clean water, and the height of the clean water is not higher than the bottom height in the hole; and regularly spraying nutrient solution to the plant leaves. The application replenishes water by supplying clean water to the bottom of the ore powder sintering hole disc with water absorption and water retention, replenishes minerals by regularly spraying nutrient solution to the plant leaves, avoids pollutants from entering the nutrient solution, thus causing the chemical properties of the nutrient solution to change and causing toxic effects on the crop root system, and at the same time, ensures that the plant roots always maintain a state of water absorption but not immersion. The method can ensure the demand of eating and harvesting the leafy vegetable at any time after the leafy vegetable grows, and ensures that the protein of the leafy vegetable can be fully utilized.

This invention discloses a vacuum coating method and system. The system includes a first sputtering chamber, a first vacuum transport channel, a CVD chamber, a second vacuum transport channel, and a second sputtering chamber connected in sequence. This invention utilizes the flow resistance throttling effect created when the substrate moves within the first vacuum transport channel to establish a pressure gradient between the first sputtering chamber and the CVD chamber. This drives the active plasma within the CVD chamber to form a reverse jet pointing towards the first sputtering chamber, performing an in-situ hybridization reaction on the first metal layer on the substrate surface, thereby constructing a gradient transition layer. This invention eliminates physical gate valves, removes particulate contamination, and significantly improves the adhesion and weather resistance of the HUD reflector coating.

The application relates to a preparation method of a fuel cell cathode plate resistant to cathode poisoning, and belongs to the technical field of fuel cells. The method comprises the following steps: obtaining an iron-based substrate with a set chemical composition and a first set thickness; obtaining a nickel-based substrate with a second set thickness; performing grinding and degreasing treatment on the iron-based substrate and the nickel-based substrate, and controlling the surface roughness of the iron-based substrate and the nickel-based substrate; performing cold composite rolling on the iron-based substrate and the nickel-based substrate after the degreasing treatment to obtain a composite strip; and sequentially performing annealing, edge cutting and sizing and runner machining on the composite strip to obtain a cathode plate. The cathode plate has stable electrochemical performance and a low ASR value at high temperature, and contains less Cr-containing substances deposited on the cathode, and can meet the high requirements of fuel cells on cathode materials.

The application provides a coke oven gas hydrogen production system, which comprises a gas tank, a gas compression device, a carbon monoxide conversion device, a decarburization tower, a water washing tower, a desulfurization device, a water removal device, a hydrogen purification device and a hydrogen storage device connected in sequence. The system of the application converts the carbon monoxide in the coke oven gas after deep impurity removal into hydrogen through the cooperation of the above devices, improves the hydrogen yield in the process of producing hydrogen from coke oven gas, and overcomes the problem of low hydrogen yield caused by separating hydrogen and carbon monoxide in coke oven gas by temperature swing adsorption in the prior art.

The utility model discloses a kind of microbial granular immobilization water supply pretreatment device, it is related to water treatment technical field, including reactor main body, the upper portion of the reactor main body is provided with backflow port and water outlet, lower portion is provided with water inlet;The inside of reactor main body is sequentially provided with water distribution device, support layer, activated carbon layer from bottom to top;Raw water enters reactor main body from water inlet, when flowing through activated carbon layer, biological in raw water is attached on activated carbon particle of activated carbon layer, biological granular layer is formed above activated carbon layer, supernatant layer is formed above biological granular layer;The device realizes under the action of hydraulic control and biological aggregation growth core, induces to form biological granule, realizes the granulation of microorganism in water, forms biological granular fluidized bed under hydraulic condition, substantially improves the biomass density of unit volume, fully plays biological effect, improves the degradation efficiency of pollutant.

The application provides a sulfur-resistant and moisture-resistant CO oxidation regular structure catalyst and a preparation method and application thereof, and is suitable for the field of catalyst technology. The preparation method comprises the following steps: placing glass fiber corrugated board in a mixed gas to obtain surface-hydroxylated glass fiber corrugated board; obtaining glass fiber corrugated board loaded with single-layer silicon oxide; generating a porous silicon oxide layer on the surface of the glass fiber corrugated board loaded with single-layer silicon oxide to obtain glass fiber corrugated board loaded with double-layer silicon oxide; placing the glass fiber corrugated board loaded with double-layer silicon oxide in an impregnation liquid for impregnation, and then performing drying, calcination and reduction to obtain the sulfur-resistant and moisture-resistant CO oxidation regular structure catalyst. The preparation method uses the glass fiber corrugated board as a carrier, uses TEOS as a silicon source, and uses a triblock copolymer P123 as a template agent. Through a gas phase deposition process, the double-layer silicon oxide is continuously covered on the surface of the glass fiber corrugated board carrier. Then, through impregnation and calcination, the iron oxide and platinum catalytic components are loaded on the surface of the double-layer silicon oxide layer. The regular catalyst does not need to be formed and can be directly filled and applied.

This invention relates to the field of air pollution control technology, specifically to a method for purifying exhaust gas from air pollution denitrification and desulfurization, including: cyclone spray desulfurization (using nano-scale composite absorbent slurry to efficiently absorb SO2 and remove particulate matter in a cyclone reactor), and two-stage catalytic denitrification (using nano-catalysts in a low-temperature zone to promote NO removal). x The process involves reduction, enhanced reaction in a high-temperature zone using a novel honeycomb ceramic carrier to support a vanadium-tungsten-titanium-based catalyst, deep synergistic purification (further removal of residual pollutants and aerosols through electrostatic dust removal coupled with oxidation adsorption), and an intelligent control system (real-time optimization of absorbent ratio, catalyst temperature, and flow rate parameters). This method addresses the problems of catalyst poisoning, high energy consumption, and insufficient treatment efficiency in traditional processes by modifying the absorbent with nanomaterials, employing temperature gradient catalytic reactions, and utilizing a multi-pollutant synergistic removal mechanism. The system achieves a desulfurization efficiency ≥98%, a denitrification efficiency ≥97%, and particulate matter emissions ≤10 mg / m³. 3 SO2 ≤ 35 mg / m³ 3 NO x ≤50mg / m 3 It meets ultra-low emission standards.

This invention discloses a high-efficiency catalytic conversion device and method for CO2 in lime kiln tail gas of steel plants. The high-efficiency catalytic conversion device for CO2 in lime kiln tail gas of steel plants includes a tail gas collection unit, an impurity adaptive pretreatment unit, a waste heat classification and utilization unit, a CO2 catalytic conversion unit, a product separation unit, and a circulation regulation unit arranged sequentially along the tail gas flow direction. The impurity adaptive pretreatment unit has a composite filter bag dust removal module that can remove dust and SO2 from the tail gas and a priority oxidation reforming module that can oxidize part of the CO in the tail gas to CO2. The waste heat classification and utilization unit divides the tail gas waste heat into three levels through a heat exchanger and a heat distribution controller. The low-temperature waste heat is used for preheating before the CO2 catalytic conversion of the raw material gas, the medium-temperature waste heat is used for reaction heating in the methanation reactor, and the high-temperature waste heat is used for electrolysis power supply in the solid oxide electrolysis cell. This can realize the on-site high-efficiency capture and high-value conversion of CO2 in lime kiln tail gas, which is very suitable for the existing energy conditions of steel plants.

This invention relates to the field of rebar cage fabrication technology, specifically to a modular rebar cage fabrication device, comprising a base, a support member fixedly installed on the upper end of the base, a positioning ring fixedly connected to the upper end of the support member, and multiple sets of transverse moving members movably arranged inside the positioning ring, each transverse moving member having a clamping member fixedly connected to its inner side: an inner ring expansion ring unit located outside the transverse moving members, an expansion groove provided on one side of the inner ring expansion ring unit, and an expansion member provided on the other side of the inner ring expansion ring unit, the inner ring expansion ring unit being used to move the position of the clamping members after the two sets of modular rebar cages are joined; and a fixing ring located outside the positioning ring. This invention, through the proposed modular rebar cage fabrication device and its method of use, first divides the rebar cage into sections, and then uses the modular rebar cage fabrication device to join multiple sections of the modular rebar cage outside the foundation pit, achieving unmanned operation throughout the entire rebar cage fabrication process.

This invention discloses a method for preparing high-purity hydroxymethionine isopropyl ester, comprising: mixing hydroxymethionine and hydroxymethionine polymer at a mass ratio of 4.0~4.8:1 as raw materials; using molecular sieve drying or isopropanol-water azeotropic dehydration to control the moisture content of the raw materials to below 0.1% to avoid catalyst poisoning; mixing the dehydrated raw materials with isopropanol and preheating to 90~110℃ to obtain a mixture; and feeding the mixture in stages into a container filled with SO4. 2‑ A fixed-bed reactor using ZrO2-SBA-15 mesoporous molecular sieve catalyst was used to carry out alcoholysis reaction at 240~260℃ and 4.5~5.5MPa. The reaction solution was separated and purified by vacuum flash evaporation, short-path distillation, precision distillation and crystallization coupling process to effectively remove light and heavy component impurities, ensuring product purity ≥99.0% and improving reaction selectivity and stability.

This invention discloses an eco-friendly concrete cementitious material and eco-friendly concrete, belonging to the field of building materials technology. This invention provides an eco-friendly concrete cementitious material that significantly improves the mechanical properties of eco-friendly concrete through the scientific compounding and synergistic effect of its components. Sulfoaluminate cement, as the main cementitious material, provides early strength and micro-expansion characteristics, effectively compensating for shrinkage. Mineral powder and silica fume, as active mineral admixtures, not only exert a micro-aggregate filling effect, densifying the microstructure of the hardened body, but also consume Ca(OH)2 in the system through a secondary hydration reaction, initially reducing the risk of efflorescence. Gypsum not only regulates the setting time but also promotes the formation of ettringite, improving the strength of the concrete matrix. By adding modified mesoporous silica, the alkali-sealing performance and mechanical properties of eco-friendly concrete can be significantly improved.

The application discloses a membrane electrode for high-temperature proton exchange membrane fuel cells and a preparation method thereof, and the membrane electrode has a ionomer layer and is a multilayer structure sequentially composed of a conductive substrate, a catalytic layer, the ionomer layer, a high-temperature proton exchange membrane, the ionomer layer, the catalytic layer and the conductive substrate, wherein the ionomer layer takes one or more polymers of polybenzimidazole or derivatives thereof as a main component, is doped with one or more conductive agents of carbon powder or derivatives thereof to form a composite material, and forms the ionomer layer on the surface of the catalytic layer. In the application, the structure control of the ionomer layer is introduced to control the distribution of electrolytes represented by phosphoric acid, more three-phase interface sites are constructed, the membrane electrode has high peak power density and high current density, the preparation process is simple and low in cost, the membrane electrode is applied to various high-temperature proton exchange membrane fuel cells, and has large-scale production and application potential.