91results about How to "Avoid poisoning" patented technology

The invention relates to the field of chemical engineering, in particular to an n-hexane separation technology, and more particularly relates to a method and a device for preparing electronic-grade n-hexane. The method for preparing the electron n-hexane comprises the following steps: S1, introducing an adsorbent into an n-hexane raw material to remove moisture in the n-hexane, and then carrying out catalytic hydrogenation reaction to obtain crude n-hexane; and S2, carrying out primary filtration on the material subjected to catalytic hydrogenation, then carrying out light component removal and heavy component removal two-stage rectification to obtain high-purity n-hexane, and carrying out secondary filtration on the high-purity n-hexane to obtain the electronic-grade n-hexane. The device for preparing the electronic-grade n-hexane comprises a raw material tank, an adsorption tower, a catalytic hydrogenation reactor, an intermediate tank, a light component removal tower, a heavy component removal tower and a product tank which are connected in sequence. According to the preparation method and device, high-purity electronic-grade n-hexane meeting the strict requirements of the semiconductor industry can be produced, the process steps are simple, industrial production is easy to achieve, the product quality is stable and reliable, and high economic and social benefits are achieved.

The invention provides a PtCo-based composite catalyst and a preparation method and application thereof.The PtCo-based composite catalyst comprises a carrier and a load, the carrier comprises mesoporous carbon, the load comprises platinum-cobalt-based metal particles and a compound with the chemical formula being HxMO3, and M comprises W or / and Mo; a contact interface exists between the platinum-cobalt-based metal particles and the compound with the chemical formula of HxMO3; the platinum-cobalt-based metal particles comprise a first part of the platinum-cobalt-based metal particles, and the first part of the platinum-cobalt-based metal particles are supported in the mesoporous structure of the mesoporous carbon. According to the PtCo-based composite catalyst, a contact interface exists between HxMO3 and PtCo-based metal particles, the catalytic activity of platinum and cobalt can be improved, and reduction of oxygen on the surface of the catalyst is facilitated; part of platinum-cobalt-based metal particles are supported in a mesoporous structure of mesoporous carbon, so that the stability of the catalyst can be improved.

The invention relates to a high-temperature denitration method based on a RTO system under a complex working condition. The method comprises the following steps: feeding waste gas into a lower-layer heat accumulator of a heat accumulation chamber under a gas inlet working condition through a waste gas inlet valve for primary preheating; the waste gas subjected to primary preheating is fed into a denitration reducing agent dynamic mixing chamber, and is uniformly distributed and uniformly flows with a denitration agent in the mixing chamber; feeding the waste gas subjected to uniform distribution and flow of the denitration agent into an upper-layer heat accumulator for secondary preheating; the waste gas is subjected to oxygenolysis of VOCs in the combustion chamber and high-temperature denitration reaction of nitrogen oxides generated by oxidizing nitrogen-containing organic matters and a denitration agent. By arranging the denitration agent pre-gasification chamber and arranging the denitration reducing agent dynamic mixing chamber in the RTO furnace heat storage chamber, the reaction retention time of a reducing agent and waste gas in a high-temperature area is prolonged, the incomplete reaction of the reducing agent entering a smoke discharging and cooling stage along with smoke due to the fact that the reducing agent is directly added into a combustion chamber is solved, the denitration reaction efficiency is improved, and the energy consumption is reduced. The usage amount of a denitration reducing agent is reduced, and the problem that traditional SCR is high in energy consumption is solved.

The invention discloses a preparation method of a lithium adsorbent with nanofiltration performance, which comprises the following steps: contacting a lithium adsorbent with a water-phase monomer solution, then contacting with an organic-phase solution, carrying out interface composite reaction after contact, forming a layer of nanofiltration membrane on the surface of the lithium adsorbent, and finally obtaining the lithium adsorbent with nanofiltration performance. According to the method, the lithium adsorbent can have nanofiltration performance, the influence of multivalent anions and multivalent cations on lithium ion adsorption of the lithium adsorbent is reduced, and the selectivity of the lithium adsorbent is improved.

The present invention discloses a chitosan-starch composite Janus particle and its preparation method and application. The present invention uses starch modified with succinic anhydride as a particle stabilizer for Pickering emulsion, and saturated fatty acid as an oil phase to prepare a Pickering emulsion template, so that a part of the starch particles are locked in the solidified fatty acid oil phase, and a part is exposed to the water phase; then the natural polysaccharide chitosan is electrostatically adsorbed with starch, so that the surface of the starch particles exposed in the water phase is combined with chitosan nanoparticles to achieve the purpose of asymmetric modification. The present invention prepares Janus particles combined with two polysaccharides for the first time, which can combine the characteristics and advantages of two biomacromolecules, and further expand the application of Janus particles in the field of food or medicine. The raw materials used in the present invention are green, environmentally friendly and natural polysaccharide materials with good biocompatibility, and have broad application prospects.

The invention discloses an agricultural planting soil pulverizer which comprises a protective cover, a speed reducer is fixedly installed in the middle of the protective cover, liquid storage tanks located on the two sides of the speed reducer are fixedly installed at the top of the protective cover, and the two ends of the bottom of the protective cover are rotationally connected with roller shafts on the two sides of the displacement speed reducer. A scraping plate is arranged on the rear side of the protective cover, the other end of the roller shaft is fixedly installed on the two sides of the bottom of the speed reducer, the peripheral face of the roller shaft is fixedly sleeved with a fixed sleeve, and a soil crushing cutter located in the protective cover is fixedly installed on the peripheral face of the fixed sleeve; a flow guide pipe located on the rear side of the soil crushing cutter is fixedly installed in the protective cover, and a connecting support located above the speed reducer is fixedly installed at the top of the protective cover. According to the soil pulverizer for agricultural planting, water fertilizer or pesticide is sprayed out through the nozzles, so that chemical fertilizer or pesticide can be sprayed while soil is pulverized, and the farming efficiency is improved.

The invention relates to the technical field of carbon dioxide dealkylation, and discloses a catalyst for removing hydrocarbon impurities in carbon dioxide and a preparation method of the catalyst. According to the catalyst for removing hydrocarbon impurities from carbon dioxide, active components are loaded on composite carrier particles; the composite carrier particles are obtained by loading a catalytic promoter cerium oxide on composite aerogel, grinding and sieving; the composite aerogel is prepared from a coagulant aid and at least two aerogel precursors by a sol-gel method. The preparation method of the catalyst for removing hydrocarbon impurities in carbon dioxide comprises the following preparation steps: 1) preparing composite aerogel from an aerogel precursor and a coagulant aid through a sol-gel method; 2) soaking the composite aerogel in a cerium nitrate solution, naturally airing, drying, roasting, grinding and sieving to obtain composite carrier particles; and 3) dipping the composite carrier particles in a mixed solution of active components, standing, drying and roasting to obtain the catalyst for removing hydrocarbon impurities from carbon dioxide.

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.

This invention discloses a method and system for eliminating alkali hazard in an alkaline water electrolysis hydrogen production and purification system. The method includes preventative interception: an alkali removal filter is installed on the pipeline between the heater and deaerator of the purification system to intercept solid alkali precipitated in the regenerator; and periodic cleaning: based on a triggering mechanism, the regenerator, heater, alkali removal filter, and connecting pipelines are periodically cleaned in a closed loop to dissolve and remove accumulated solid alkali. This invention achieves complete alkali hazard elimination in the hydrogen production and purification system through preventative interception and periodic cleaning. No changes to the original main structure are required; only the addition of an alkali removal filter and a corresponding closed-loop cleaning circuit is needed for modification, making the modification simple and cost-effective. It prevents solid alkali from entering subsequent equipment, avoids pipeline blockage and catalyst poisoning and deactivation, ensures long-term stable system operation, reduces maintenance frequency and costs, and improves hydrogen purity and quality.

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 invention discloses a method for depositing an aluminum oxide coating at a high speed by a high-power pulse magnetron sputtering technology of an ultrahigh-temperature liquid target material, and relates to a method for depositing an aluminum oxide coating at a high speed. The invention aims to solve the problem that the sputtering rate of a target material is very low due to a target poisoning phenomenon in the existing aluminum oxide coating sputtering deposition process. The method comprises the following steps: 1, putting a sputtering target material into a target seat, and adjusting a gap between the target seat and a magnetron target cooling base; 2, forming high-power pulse magnetron sputtering discharge through a high-power pulse magnetron power supply until the surface of the target material is molten; and 3, O2 gas is introduced, and sputtering is carried out at high power and ultra-high temperature. The method is used for high-speed deposition of the aluminum oxide coating through the ultrahigh-temperature liquid target high-power pulse magnetron sputtering technology.

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 invention relates to the technical field of VOCs waste gas treatment, in particular to a water-resistant catalyst as well as preparation and application thereof. The invention provides a preparation method of a water-resistant catalyst. The preparation method comprises the following steps: mixing manganese salt and a template agent A in water, and performing hydrothermal treatment to obtain a precursor A; mixing the precursor A, cobalt salt and a template agent B in water, and performing hydrothermal treatment to obtain a precursor B; calcining the precursor B to obtain the water-resistant catalyst. According to the cobaltosic oxide composite material which is prepared by firstly preparing a manganese precursor, loading a cobalt precursor on the manganese precursor and finally calcining and takes sea-urchin-shaped manganese dioxide as a substrate and is loaded on the substrate, which is provided by the invention, the cobaltosic oxide composite material is proved to be capable of carrying out catalytic oxidation treatment on Cl-VOCs under a low ozone amount in a water-containing environment.

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.

The invention provides a lithium battery module compression resistance testing device and testing method, and belongs to the technical field of lithium battery detection.The lithium battery module compression resistance testing device comprises a testing table, limiting sliding rods are fixedly connected to the four corners of the upper end of the testing table, and two top plates are fixedly connected to the upper ends of the multiple limiting sliding rods respectively; the protection box is connected to the circumferential surfaces of the multiple limiting sliding rods in a sliding mode; the number of the purification mechanisms is two, and each purification mechanism comprises an air inlet channel, an air pump, an air conveying pipe, an exhaust channel, an absorption box, a partition plate, sponge, an air inlet pipe, lime water and a heater; by using the device, when the lithium battery module is subjected to a compression resistance test, if spontaneous combustion occurs, the purification mechanism absorbs and purifies carbon monoxide gas generated by spontaneous combustion, so that the environment is prevented from being polluted by carbon monoxide, and a tester is prevented from being poisoned by inhaling excessive carbon monoxide gas.

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.

The present invention discloses a hydrogen sensor testing device, comprising a testing cylinder and a sensor body fixed in the testing cylinder, wherein a plurality of air inlet holes are provided on the lower side of the testing cylinder, a baffle plate is slidably installed in the testing cylinder, and a one-way opening component is provided on the baffle plate; when the baffle plate slides upward, the sensor body pushes the one-way opening component to move and detects the gas entering from the air inlet hole; the present invention provides a hydrogen sensor testing device, wherein when ambient gas is sucked from the air inlet hole, the baffle plate blocks the hydrogen sensor and ambient gas in the testing cylinder, thereby preventing the high-speed flowing gas from impacting the hydrogen sensor; when the baffle plate rises to a certain height, the fixed hydrogen sensor pushes the one-way opening component to make the hydrogen sensor contact with the stable ambient gas, thereby detecting the ambient gas, and avoiding poisoning of the hydrogen sensor.

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 relates to the technical field of blood detection equipment, and discloses a novel concentration analyzer and a connecting structure thereof.The novel concentration analyzer comprises a protective shell, a liquid inlet is formed in the rear side of the protective shell, a liquid outlet is formed in one side of the liquid inlet, the liquid outlet is formed in the rear side of the protective shell, and the liquid inlet is connected with a detection cavity through a pipeline; the detection cavity is connected with a liquid outlet through a pipeline, a negative pressure pump is arranged in the detection cavity, and a sensor array is arranged in the detection cavity; the PLC module is installed in the protective shell and used for controlling cooperation between the modules and data transmission; the valve control module is installed in the protective shell and used for controlling opening and closing of the three-way valve and the pipeline switching state. By regularly extracting blood for concentration analysis, the drug dosage is adjusted in real time according to data, drug poisoning caused by continuous pump injection is avoided, blood concentration detection is automatically performed by setting different time intervals, the medication safety is ensured, and the treatment accuracy and efficiency are improved.

The invention discloses a complexing agent for separating and purifying high-boiling residues in polycrystalline silicon slag slurry and a preparation method of the complexing agent, and relates to the technical field of complexing agents, the complexing agent comprises secondary recrystallization sodium chloride, crown ether, a dispersing agent and an anti-caking agent calcium silicate, and a complexing agent product is obtained through ball milling homogenization and air jet pulverization; the secondary recrystallized sodium chloride accounts for 90-110 parts; 0.1 to 0.3 part of crown ether; 1-3 parts of a dispersing agent; the anti-caking agent is 0.1 to 0.3 part of calcium silicate. The crown ether and the anti-caking agent calcium silicate are adopted in the complexing agent, the efficiency of the complexing agent is improved, the complexing agent is added according to the mass ratio of 1.5-2% of the mass of the high-boiling residues, the optimal aluminum removal capacity is shown at the temperature of 150-160 DEG C, and the recovery quality of the high-boiling residues is improved.

The present invention discloses a natural gas safety sampler valve, including a sampler valve, a sampling probe is arranged at the bottom of the sampler valve, the gas outlet end of the sampling probe is connected to the main stop valve through the main channel, the main stop valve is arranged on the sampler valve, and the main stop valve is connected to the first secondary channel; the first one-way valve quick connector is connected to the first sampling conduit; the first emptying stop valve is connected to the sewage channel provided on the sampler valve, and a sewage pipe is arranged at the sewage channel. On the one hand, the present invention can effectively prevent the pressurized gas from being sprayed to the surroundings to poison the operator or cause a safety accident; on the other hand, during the sampling process, the sampling pressure of the natural gas can be checked while reducing the thread wear, thereby extending the service life; on the other hand, it effectively improves the extraction purity, improves the analysis accuracy and reduces the labor intensity of the operator.

The invention provides a method for removing sulfur trioxide in flue gas by evaporation coupling of a desulfurization wastewater bypass flue, which comprises the following steps of: changing quenched and tempered desulfurization wastewater into solid particles by utilizing a bypass flue evaporation device, spraying the solid particles into the front side and the rear side of an SCR (Selective Catalytic Reduction) denitration device, absorbing SO3 in the original flue gas at a boiler outlet and SO3 newly added after SO2 is catalyzed by a catalyst, and removing sulfur trioxide in the flue gas by utilizing the desulfurization wastewater bypass flue evaporation coupling. The SO3 removal efficiency is improved, the problem that a liquid spraying type nozzle directly sprays high-salt desulfurization wastewater and is easy to block is solved, and the device is suitable for large-scale popularization and application.

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.

The present invention discloses a device and method for preparing carbon-supported platinum nanocatalysts by solid-phase mixing. The device comprises a precursor solution tank, a solution mixing device, a mixed solution tank, and a material tank which are connected in sequence by pipelines and pumps. The solution mixing device is provided with a spiral pipeline, and the material tank is placed inside the solid material mixing device. The method of use is as follows: the precursor solution is fully mixed through the spiral pipeline and ultrasonic treatment, a carbon carrier is added to the precursor mixed solution under stirring, or a precursor mixed solution is added to the carbon carrier for ultrasonic pretreatment, and after stirring and mixing, the mixture is dried, reduced, sintered, cleaned, and dried again. Compared with the prior art, the operation process of the present invention is simple, controllable, and has a short cycle. It does not require the addition of organic surfactants and complexing agents. It can be filtered and cleaned with pure water, and a large amount of polluted waste liquid will not be generated. It can realize batch and continuous production of high-loaded PtC catalysts, and is suitable for large-scale preparation of PtC catalysts for commercial applications.

The invention relates to an air leakage prevention valve with an alarm function. The air leakage prevention valve comprises a valve body, the left end of the valve body is fixedly connected with a breather pipe, the lower end of the breather pipe is fixedly connected with an air inlet pipe, the breather pipe communicates with the air inlet pipe, a valve element is rotationally arranged in the valve body, a through hole is formed in the valve element, and the left end of the valve element is fixedly connected with a rotating block; a trigger cavity is formed in the right end of the valve element, a movable plate is arranged in the trigger cavity, the movable plate is movably connected with the valve body and the valve rod, a valve cover is arranged at the right end of the valve body, a valve handle is arranged at the right end of the valve cover, and the valve rod sequentially penetrates through the movable plate, the valve body and the valve cover and is fixedly connected with the valve handle. The valve rod is rotationally connected with the valve body and the valve cover, the valve body is provided with an alarm lamp and a buzzer, and the alarm lamp and the buzzer both penetrate through the right side of the valve body and extend into the triggering cavity, so that when the valve body leaks air, an alarm can be given in time, the air inlet pipeline is closed, the valve is prevented from being opened and closed due to accidental touch, and meanwhile installation is convenient.

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.

The invention discloses an air disinfectant and a preparation method thereof, and relates to the technical field of disinfectants, folium artemisiae argyi, radix stemonae, chlorine dioxide, acorus calamus, rhizoma polygoni cuspidati, deionized water, cortex magnoliae officinalis, radix angelicae, ethanol and essence are combined according to a certain proportion to form the novel air disinfectant, the toxicity of the air disinfectant is reduced, the aromatic smell is increased, and the air disinfectant has a good air disinfectant effect. When the folium artemisiae argyi, the radix stemonae, the chlorine dioxide, the acorus calamus, the polygonum cuspidatum, the deionized water, the cortex magnoliae officinalis, the radix angelicae, the ethanol and the essence are proportionally combined, the viscosity is lower than 0.4 Pas, at the moment, the propeller stirrer is most suitable to use, and the propeller stirrer is small in diameter, so that the propeller stirrer can be used for stirring the poultry and the people. The rotating speed is high, the circulating capacity is high, power consumption is low, a strong circulating flow can be formed, and folium artemisiae argyi, radix stemonae, chlorine dioxide, acorus calamus, polygonum cuspidatum, deionized water, mangnolia officinalis, radix angelicae, ethyl alcohol and essence can be better stirred and mixed when being placed in a push type stirrer.

The invention relates to the technical field of farmland devices, and provides a farmland junction pest migration blocking device and a using method.The farmland junction pest migration blocking device comprises a V-shaped groove, a rainproof assembly, a blocking assembly, a supplementing assembly, a cleaning assembly, a drainage ditch and a collecting assembly.The V-shaped groove is formed in the junction of two farmlands; the rainproof assembly is arranged on the upper portion of the V-shaped ditch and fixedly installed at the junction of two farmlands, the blocking assembly is installed in the V-shaped ditch, the supplementing assembly is installed in the rainproof assembly and located on the upper portion of the blocking assembly, the cleaning assembly is installed in the rainproof assembly, a drainage ditch is formed in the drainage position of the V-shaped ditch, and the bottom of the drainage ditch is lower than the blocking assembly. By means of the technical scheme, the problem that in the prior art, when two kinds of plants in different growth periods are planted adjacently, pest migration occurs at the farmland junction, so that pests spread continuously, and the farmland yield is reduced is solved.