73results about How to "Solve corrosive" patented technology

The invention discloses a clean production process of a blended fertilizer, which comprises the following steps: preparing and selecting raw materials; performing primary granulation on different raw materials to obtain uniform granular raw materials; performing closed ventilation storage on the granular raw materials; proportioning and metering the granular raw materials; mixing and stirring; finally, packaging is carried out, 4-5 mm particles obtained after the raw materials are subjected to extrusion forming through a pair of rollers and subjected to primary granulation are consistent in appearance state, air in the raw materials is removed through extrusion, gaps are compressed, the density and specific gravity of the formed particles tend to be uniform, and the product quality is improved. Blending layering caused by particle size, density difference and different adsorption capacities cannot occur when the raw materials are blended, the blended compound fertilizer meets the international general blending fertilizer proportioning principle, the completely-homogenized blending fertilizer quality requirement can be met, the processing cost is saved, the production efficiency is improved, and the production cost is reduced. And the problem of caking of the raw materials is effectively solved.

The invention discloses a vamp processing method. The vamp processing method comprises the steps that a vamp is combined with a shoe tree; the to-be-processed area of the vamp is fed into the processing box through the shoe tree, then the processing box is closed, and the to-be-processed area is the area where the vamp makes contact with the outsole; a workpiece located in the box cover is rotated, the to-be-machined area is machined through the workpiece, the workpiece is a grinding wheel or a glue brush surrounding and making contact with the to-be-machined area, when the workpiece is the grinding wheel, the to-be-machined area is ground, and when the workpiece is the glue brush, the to-be-machined area is not ground. And the processing treatment is to brush the to-be-processed area with glue or a treating agent. According to the device, the processes of polishing or brushing glue or brushing a treating agent in the to-be-processed area of the vamp can be carried out in a closed box in a centralized manner, so that the influence of powder generated during polishing on other equipment (such as a manipulator and a driving motor) is effectively avoided, and meanwhile, the corrosion of the glue or the treating agent sprayed out on the other equipment is also prevented; the cleanliness of a production environment is improved; and the service life of equipment is prolonged.

The invention belongs to the technical field of flexible aqueous secondary batteries, and discloses a bending-resistant and long-life flexible fibrous aqueous zinc-iodine battery and a preparation method thereof. The invention aims to solve the problems of structural damage of the fiber battery in bending, charging and discharging processes and side reaction of a fiber zinc negative electrode. The battery comprises a flexible fiber zinc negative electrode, a hydrogel electrolyte and a flexible fiber positive electrode, the fiber zinc negative electrode is immersed in an aqueous solution of sodium alginate and polyacrylamide to be coated with a layer of pre-gel solution, and then the fiber zinc negative electrode is immersed in an aqueous solution of zinc salt to form the hydrogel electrolyte in situ; then, after the zinc negative electrode coated with the gel electrolyte and the iodine-containing fiber positive electrode are twisted, a layer of gel electrolyte is prepared to wrap an electrode, and finally, silicon rubber is used for wrapping to complete preparation. The material has long cycle life and excellent bending resistance, the capacity retention ratio is 90% after circulation for 3500 times under the current density of 5C, and the capacity retention ratio is still 80% after bending for 3000 times under the bending radius of 12mm and the bending angle of 90 degrees.

The invention relates to a moderator element for a nuclear reactor, the moderator element comprises a shell and a core block, the core block is a metal hydride moderator and is packaged in the shell, and the shell is a ceramic shell or a metal shell and is composed of a shell body and a cover body which are connected in a sealed mode. The invention also relates to a preparation method of the moderator element for the nuclear reactor. According to the moderator element for the nuclear reactor, the shell is prepared through the additive manufacturing forming technology, then the heat treatment technology is combined, densified packaging of the moderator is achieved, the problems that the moderator is prone to oxidation and corrosion in the using process are solved, and the requirement of the advanced nuclear reactor type for the moderator is met.

The invention provides a red mud treatment method. The treatment method effectively solves the problems that in the prior art, red mud is complex in component, poor in economical efficiency, poor in red mud magnetic concentrate grade and low in iron recovery rate, magnetic tailing resources are not fully utilized, the cost is low, and the like through electromagnetic magnetization pre-reduction roasting treatment, magnetic separation enrichment of iron concentrate powder, smelting reduction iron extraction, smelting tailings building application and magnetic separation tailing enrichment and aluminum extraction. The method solves the problems of difficulty in operation of a melting ironmaking process and poor building material performance of slag in the prior art, so that iron and aluminum in the red mud are fully recycled, and the economic benefit of red mud treatment is remarkably improved.

The invention discloses a clean production process of a compound fertilizer, which comprises the following steps: carrying out primary granulation on raw materials to obtain granular raw materials; proportioning and mixing the granular raw materials to obtain a mixture; the mixture is crushed; carrying out secondary granulation; the raw materials are directly granulated and put in storage, so that the obvious defects of moisture absorption, hardening and deterioration easily caused by raw material storage in a compound fertilizer plant are overcome, the worry of long-term storage of the raw materials is fundamentally solved, the use area and conditions of a production plant are optimized, and the granulated granular raw materials can be stored in a large scale in a storage form of a new process. The contact area between particles is reduced, the volume compression density is increased, wet gas is not easy to enter, a series of practical problems of material overflow, dust splashing, corrosion caused by the fact that materials absorb moisture and adhere to production equipment and the like in traditional compound fertilizer production are well solved, and the requirements of green factories and clean production are well met. And the whole process is simple and efficient.

The utility model provides a sintering flue gas dust removal device, which belongs to the technical field of sintering flue gas treatment and comprises a coarse dust removal device, a fine dust removal device and a flue gas emission device, the coarse dust removal device comprises a dust collection cover arranged above the pelletizing disc, a dust removal conveying pipeline connected with the dust collection cover and a spraying structure arranged in the dust removal conveying pipeline; the fine dust removal device comprises a shell, a folded plate dehydration device and a dehydrated flue gas retreatment device, and the folded plate dehydration device is arranged in the shell and is close to the flue gas slurry inlet end; the top end of the baffle is arranged at the top end of the interior of the shell, and the airflow uniform distribution plate, the water bath assembly and the tube bundle demister are sequentially arranged in a space formed by the baffle and the inner side wall, close to the dust removal flue gas discharging end, of the shell from bottom to top. By utilizing the device, the problems of bag pasting and corrosion when a bag-type dust remover is used for removing dust from sintering flue gas containing water vapor generated in a sintering and pelletizing process in the prior art can be solved.

The utility model discloses building inclination measuring equipment, including the seat body, the seat body inside upside rotation is connected with the installation rod, the downside of seat body right -hand member is equipped with the angle ruler, the right side rotation is connected with the connecting rod at angle ruler front end, and the front side of connecting rod outer arc surface is provided with the pointer, still including the protection mechanism, the protection mechanism: it includes the storage groove, the installation slot, the plug rod, chuck and the jack, the storage groove sets up in the downside of seat body right -hand member, and the installation slot sets up in the upside of seat body left -hand member, and the middle part sliding connection of storage groove top wall has the plug rod, and the middle part of chuck outer arc surface sets up in the installation rod, and the left side and the downside of chuck outer arc surface all are equipped with the jack, and the plug rod is installed with the jack of vertical adjacent cooperation, and this building inclination measuring equipment has solved the problem that the scale line of angle ruler printing or etching has disappeared because of ultraviolet or chemical corrosion, has improved the service life and precision of angle ruler.

The invention discloses a fully plastic pistol spray pump, comprising a pump body, a lock cover connected to the lower part of the pump body, a liquid spray channel arranged in the pump body, a nozzle arranged at the outlet of the liquid spray channel, a liquid outlet channel and a liquid inlet channel separated up and down arranged in the pump body, wherein the liquid outlet channel is connected with the liquid spray channel, a liquid introduction cavity is arranged at the sides of the liquid outlet channel and the liquid inlet channel, the upper part of the liquid introduction cavity is always connected with the liquid outlet channel through a normal opening, a suction plug is arranged in the liquid introduction cavity, a trigger which can drive the suction plug to make left and right piston movement in the liquid introduction cavity is hingedly connected to the pump body, an elastic arm which can press on the pump body and drive the trigger to drive the suction plug to reset, a lateral one-way valve which can be opened to connect the liquid introduction cavity and the liquid inlet channel when the suction plug resets is arranged between the liquid introduction cavity and the liquid inlet channel, and the pump has the characteristics of simple structure, high liquid introduction efficiency, and can fully utilize the solution sucked into the liquid introduction cavity by the pump.

The present invention relates to a method for treating radioactive waste tail gas by using plasma technology, comprising the steps of: performing plasma gasification and melting treatment on radioactive waste in a combustion chamber; solidifying the glass body, and desulfurizing and denitrifying the flue gas in a dry and water-free high-temperature catalytic ceramic filter; fully burning the unburned combustible materials in the flue gas in the second combustion chamber; the flue gas enters the SNCR denitrification device for denitrification; the flue gas enters the G-L heat exchanger for heat exchange; the flue gas enters the semi-dry quenching tower for heat exchange; the flue gas enters the bag filter for dust removal; the flue gas at the bag filter outlet is filtered through a high-efficiency combined filter. The beneficial effects of the present invention are: in the high-temperature section, most of the dust and ash are filtered out by the high-temperature catalytic ceramic filter, and then through the bag filter, most of the nuclides in the dust and fly ash are solidified by the glass body or intercepted in the fly ash, and the remaining small amount of I-129 and Tc-99 are purified by the high-efficiency combined filter; clean and qualified flue gas is obtained.

This invention belongs to the field of acyclic compound technology, specifically relating to a method for preparing tert-amyl peroxide. A tert-amyl hydrogen peroxide aqueous solution is added to a solvent and stirred to obtain a mixed solution. Under stirring conditions, p-toluenesulfonic acid and ferric phosphide are added sequentially to the mixed solution. After the addition is complete, stirring continues to produce reaction solution I. Under stirring conditions, acetic anhydride is added to reaction solution I. After the addition is complete, stirring continues to produce reaction solution II. A washing solution is added to reaction solution II, and the mixture is stirred and washed, then separated to obtain crude tert-amyl peroxide. The crude tert-amyl peroxide is washed, dried, and the solvent is removed to obtain tert-amyl peroxide. This invention avoids the problems of large amounts of hydrochloric acid produced by traditional acyl chloride methods and the corrosiveness caused by using sulfuric acid as a catalyst. Furthermore, ferric phosphide is magnetic, allowing for recycling through magnetic separation after the reaction. p-Toluenesulfonic acid can be regenerated through ion exchange resin, significantly reducing production costs.

The utility model discloses a rotary air pre-heater ring-dividing temperature rising system based on air heater zone management. The rotary air pre-heater ring-dividing temperature rising system comprises a rotor, a circumferential movable partition plate, a special-shaped static partition plate, a cold air inlet pipe and an air heater system. The circumferential movable partition plates are mounted on the lower end face of the rotor and divide the lower end face of the rotor into N concentric rings; the cold air inlet pipe is located below the lower end face of the rotor and at least covers one air branch bin. The special-shaped static partition plates are installed in the cold air inlet pipe, the cold air inlet pipe is divided into at least N independent ring-dividing air inlet pipes, and the ring-dividing air inlet pipes are located below the corresponding concentric rings. The air heater system comprises N partition air heaters, a heat source conveying pipe and N air heater partition air inlet valves, and the partition air heaters are installed in the corresponding branch ring air inlet pipes. One end of the heat source conveying pipe is connected with a heat source, the other end of the heat source conveying pipe is branched into N heat source branch pipes, the heat source branch pipes lead to the corresponding partition air heaters, and the air heater partition air inlet valves are installed on the corresponding heat source branch pipes. The device can solve the problems of blockage and corrosion.

The invention relates to a moderator-containing fuel element which comprises a shell and a core block, the core block is packaged in the shell and comprises fuel particles distributed in a moderator in a dispersed mode, and the shell is a ceramic shell or a metal shell and is composed of a shell body and a cover body which are connected in a sealed mode. The invention further relates to a preparation method of the fuel element containing the moderator. According to the fuel element containing the moderator, the shell is prepared through the hot pressing sintering or additive manufacturing forming technology, then the heat treatment technology is combined, densified packaging of the moderator and the fuel is achieved, and the problems that the moderator and the fuel are prone to oxidation and corrosion in the using process are solved; and the design requirements of advanced nuclear reactor types on moderator-containing fuel elements are met.

The invention provides a tubular evaporation wall reactor, and relates to the technical field of supercritical water oxidation reactors, the tubular evaporation wall reactor comprises a reactor cylinder, a lining sleeve, an upper cover and a lower cover, the lining sleeve is formed by sintering a porous material, the lining sleeve is arranged in the reactor cylinder, and the upper cover and the lower cover are arranged in the reactor cylinder. A gap is reserved between the outer wall of the lining sleeve and the inner wall of the reactor barrel, the upper cover and the lower cover are connected to the two open ends of the reactor barrel in a sealed mode respectively, and the two ends of the lining sleeve abut against the upper cover and the lower cover respectively; a space defined by the lining sleeve and the reactor cylinder is an outer cavity, and the inner space of the lining sleeve is an inner cavity. Compared with the prior art, the tubular evaporation wall reactor has the advantages that a high-corrosion medium in a reaction area can be prevented from entering the outer cavity to be in contact with the wall surface of the reactor barrel, salt-containing fluid in the reaction area can be prevented from separating out organic salt on the wall surface of the lining sleeve, and the problems of corrosion of the inner wall of the reactor barrel and salt deposition of the lining sleeve are solved.

The present invention discloses an intrinsically safe and low-energy consumption ethylene propoxylation loop reaction device, comprising a pre-reaction unit, a reaction unit, a water conduction unit and a heat energy utilization unit, wherein the heat energy utilization unit is used to obtain and store the heat energy of the first reaction heat exchanger and the second reaction heat exchanger, and the water conduction unit further controls the temperature of the pre-reactor and the reactor to output water of corresponding temperature to the pre-reaction heat exchanger, the first reaction heat exchanger and the second reaction heat exchanger, and the reaction conditions of the pre-reactor and the reactor are controlled in a non-flammable zone. In the above manner, the present invention increases the heat storage process, absorbs and stores the reaction heat during the reaction, and supplies it to the pre-reactor, the reactor, the primary energy user and the secondary energy user, so as to achieve heat energy creation and reduce the amount of circulating water, greatly reduce energy consumption, make the reaction in the non-combustion zone, achieve low-pressure intrinsically safe reaction, high safety and low equipment investment.

The invention relates to a method for detecting the content of aluminum and potassium in cesium-containing aluminum brazing flux, and belongs to the technical field of chemical detection and analysis. The detection method provided by the invention comprises the following steps: S1, adding water into a cesium-aluminum-containing brazing flux sample, uniformly mixing, then adding concentrated nitric acid with the volume of V1 and perchloric acid with the volume of V2, boiling to concentrate the total volume to V2, cooling, diluting, and filtering to obtain a to-be-detected solution; and S2, respectively analyzing the concentration of the aluminum element and the concentration of the potassium element in the to-be-detected liquid at the wavelength of 396.150-396.154 nm and the wavelength of 766.488-766.494 nm by adopting an inductively coupled plasma emission spectrometry to obtain the aluminum content and the potassium content in the cesium-containing aluminum soldering flux sample. The detection method provided by the invention solves the problems of instrument corrosion caused by high fluorine in the aluminum soldering flux, serious cesium matrix interference and low determination accuracy, and is high in accuracy, good in precision and high in sensitivity.

The utility model relates to electrician technical field, and specifically disclose a kind of extra-high voltage isolating switch shield of asymmetric layered structure, pass through shielding device design, to reach the effect of equipment closure, accurate control asymmetric electric field, solve the problem of "local electric field concentration", give consideration to "high insulation" and "partial discharge protection", adapt complex insulation scene, strengthen "mechanical performance adaptability", cope with asymmetric load, optimize "environmental tolerance", solve the problem of "local corrosion or wear", reduce "corona loss" and "temperature rise risk", adapt extra-high voltage energy-saving demand, first annular frame and second annular frame are used to guide component rotation, optimize electric field distribution, inhibit corona and insulation breakdown, isolate external pollutants, protect key components, resist external force impact, maintain structural stability, optimize current path, reduce local overheating.

The invention relates to an internal seepage-external prevention composite waterproof agent which comprises a curing system and an anti-seepage system, and the curing system is composed of modified epoxy resin and a curing agent. The invention also relates to a preparation method of the internal permeation-external prevention composite waterproof agent. The prepared internal permeation-external prevention composite waterproof agent is sprayed into concrete, a double-pipe strategy is adopted, high polymer material coating is carried out on the surface of the concrete, self-structure corrosion prevention capable of being recycled and repaired is achieved by depending on the property of a concrete material, the impermeability and long-acting waterproofness of the concrete are effectively improved, and the waterproof performance of the concrete is improved. The life cycle of the concrete in a severe environment is prolonged.

The invention discloses a clean production system of a compound fertilizer, which comprises a primary granulation device, a storage device, a metering device, a mixing device, a screening device and a packaging device, the primary granulation device is used for preparing raw materials of the compound fertilizer into granular raw materials, and the storage device is used for storing the granular raw materials after primary granulation; the metering device is used for weighing and metering granular raw materials, the mixing device is used for mixing and stirring the weighed and metered granular raw materials, the screening device is used for screening the mixed granular raw materials, the packaging device is used for packaging the screened granular raw materials, and the raw materials are directly granulated and put in storage. The obvious defects of moisture absorption, hardening and deterioration easily caused by raw material storage in a compound fertilizer plant are overcome, the worry of long-term storage of the raw materials is fundamentally solved, the usable area and conditions of a production plant are optimized, and the production environment is effectively improved.

The invention relates to the technical field of fluid material storage and transportation, in particular to an inverted cover type hydraulic bearing material storage device and method. An inverted cover type hydraulic bearing material storage device comprises a protective cover and a material bag. The shield is a rigid shield and comprises a shield body, the shield body is arranged below the liquid level of the liquid medium, an inner chamber is arranged in the shield body, a channel is arranged at the bottom of the side wall of the shield body, and the inner chamber is communicated with the outside of the shield body through the channel; the material bag is a flexible material bag, materials are stored in the material bag, the density of the liquid medium is larger than that of the materials, and the material bag is arranged on the top of the inner chamber of the protective cover. The problems that a soft material bag structure is insufficient in rigidity and strength, too large in deformation and low in monomer capacity are solved, leaked materials are stored above the liquid level in the protective cover and are isolated from air, and safety can be guaranteed.

The application discloses a true triaxial hydraulic fracturing seepage liquid collecting and boundary regulating device and an analysis method, which comprises six partitioned flow guide loading plates, six sets of boundary pressure regulating units, a high-precision metering device and a data acquisition system. The inner side of each loading plate is provided with a flow guide groove network and a flexible rubber ring, which are used for independently guiding the seepage liquid on the six surfaces of the sample to a liquid collecting cavity. The collecting pipeline is provided with a three-way joint, which is connected with the liquid outlet hole, the metering balance and the regulating unit respectively, so that the real-time metering of the seepage liquid and the regulating of the boundary pressure are synchronously performed; the regulating unit adjusts the internal pressure of the pipeline, and six directions can be independently set to construct a homogeneous or inhomogeneous boundary field. The data acquisition system records the injection parameters, the boundary pressure and the seepage liquid parameters, calculates the fracturing efficiency according to the flow conservation, and determines the preferential expansion direction of the crack in combination with the seepage response characteristics of each direction. The application realizes the independent metering of the seepage liquid on the surface and the flexible regulating of the boundary, avoids the pollution of the equipment, and improves the evaluation precision of the fracturing efficiency.

The invention discloses a corrosion-resistant and high-temperature-resistant composite material based on graphene / carbon fibers and a preparation process, gamma radiation treatment and aqueous alkali treatment are used for promoting combination of graphene and zirconium oxide with carbon fibers, so that chemical stability and thermal stress stability of the graphene and the zirconium oxide on the carbon fibers are improved; the corrosion resistance and high temperature resistance of graphene and zirconium oxide can be brought to the carbon fiber, so that the carbon fiber has corrosion resistance and high temperature resistance, and the defects of insufficient corrosion resistance and high temperature resistance of a carbon fiber material in the prior art are overcome; gamma radiation treatment is carried out in an alkali solution, the interface bonding force between graphene and carbon fibers and a reinforcing compound or a matrix material can be enhanced, and compared with the prior art, the interface bonding force between graphene and carbon fibers and the matrix material can be enhanced; and a more stable protection layer is formed while the corrosion resistance of the graphene and the carbon fibers is improved, so that the material has excellent corrosion resistance.

This application discloses a display panel and display device, relating to the field of display technology. It solves the problem that removing a portion of the organic layer in the non-display area exposes some signal lines in subsequent processing steps, preventing oxidation or corrosion of the exposed signal lines and improving the reliability of the display panel. The display panel includes: a substrate layer comprising a display area and a non-display area; a first metal layer disposed on one side of the substrate layer; a buffer insulating layer disposed on the side of the first metal layer away from the substrate layer; a pixel driving device disposed in the display area, located on the side of the buffer insulating layer away from the first metal layer; and a driving signal line disposed in the non-display area, located on the first metal layer, electrically connected to the pixel driving device. The orthographic projection of the driving signal line on the substrate layer falls into the orthographic projection of the buffer insulating layer on the substrate layer. The driving signal line is used to transmit display driving signals.

The invention relates to the technical field of fluid control and testing, and discloses a wide-area flow range multi-gas online mixing system and a control method thereof, and the wide-area flow range multi-gas online mixing system comprises a first gas path channel used for conveying basic fuel gas; the second gas path channel is used for conveying inert gas; and the third gas path channel is used for conveying high-activity additive gas. Through a large-flow metering branch, a small-flow metering branch and a low-flow-resistance straight-through branch which are connected in parallel in a first gas path channel, a second gas path channel and a third gas path channel, the purpose of adapting to large-span flow change including main and auxiliary gas switching from trace gas to large gas in each path is achieved; within a large-span gas internal combustion engine fuel low calorific value range and under the condition of different gas components and proportions, pressure backward flowing or main gas extrusion can be avoided through main pipeline switching, path control and different mixing port structures, and the mixing precision is ensured.

The utility model provides an anti-beetling box sleeve for books. The book anti-beetling box sleeve comprises an anti-beetling coating, at least one piece of paper and a box sleeve, the surface of the paper is coated with an anti-beetling coating, at least one piece of paper is pasted on the letter sleeve, and books are arranged in the letter sleeve. The book anti-beetling box sleeve solves the problems that cultural relics decay in a humid environment in the preservation process and are prone to beetling corrosion by insects, the acidity and alkalinity are difficult to balance, paper goes bad, and books are corroded and polluted by dust after being placed for a long time.

The application provides a germanium ingot refining device based on fluorinated salt assistance and reduction atmosphere coupling, and relates to the field of metal smelting, comprising a furnace body, a closed refining reaction cavity is formed in the furnace body, an upper reaction zone and a lower reaction zone are arranged in the furnace body; a reduction gas introduction joint is connected to the top of the furnace body and connected with an external gas supply system, and is used for introducing a reducing atmosphere into the lower reaction zone; a fluorinated salt feeding component is arranged on one side of the furnace body; a mixing mechanism is arranged in the middle of the furnace body; and an exhaust system is connected to the top of the furnace body. The application realizes that the fluorinated salt solution is uniformly sprayed in the form of atomization on the surface of GeO2 raw materials or molten germanium, and solves the problems of uneven addition of fluorinated salt, small contact area and low reaction efficiency in the prior art. The atomization spraying greatly increases the reaction interface, so that the fluorination reaction is more sufficient and fast, and then the stirring of the mixing mechanism is matched, so that the reaction rate is further improved.

The invention relates to a large-scale preparation method of low-water-oxygen rare earth fluoride, which comprises the following steps: by taking rare earth metal as a raw material, carrying out multiple hydrogenation and dehydrogenation operations to obtain rare earth metal with the specific surface area of more than 10m < 2 > / g, and then carrying out low-temperature pressurized fluorination reaction on anhydrous hydrogen fluoride and the rare earth metal with the high specific surface area to obtain the rare earth fluoride with the O content of less than or equal to 10ppm and the H2O content of less than or equal to 15ppm.

The invention provides a surface nitriding treatment seawater corrosion-resistant wave-absorbing material and a preparation method thereof, and belongs to the technical field of metal surface treatment.The preparation method specifically comprises the steps that firstly, carbonyl iron powder is pretreated, specifically, acid pickling is conducted to remove surface impurities and an oxide layer, and then the carbonyl iron powder is subjected to surface nitriding treatment; and cleaning residual acid liquor and other soluble impurities with water. And then the pretreated carbonyl iron powder is placed in a nitriding furnace to be subjected to surface nitriding treatment, and after nitriding treatment is completed, heat treatment and surface modification treatment are conducted. And complicated chemical reaction and high-temperature treatment are abandoned, so that the production cost is reduced. After nitriding treatment, a compact iron nitride protection layer is formed on the surface of the carbonyl iron powder, so that the corrosion resistance of the carbonyl iron powder material in a marine environment is enhanced, the electromagnetic property of the carbonyl iron powder material is optimized, and the thermal stability and the electromagnetic wave absorption efficiency are improved.

The invention relates to the field of heating ventilation air conditioners, water supply equipment and water treatment equipment, and discloses a spiral defoaming exhaust device which comprises a tank body, an upper end socket is arranged at the upper end of the tank body, an exhaust pipeline is arranged on the upper end socket, a lower end socket is arranged at the lower end of the tank body, a drainage pipeline is arranged on the lower end socket, and a water inlet pipeline and a water outlet pipeline are arranged on the side surface of the tank body. An upper fixing plate and a lower fixing plate are arranged in the tank body, a plurality of spiral pipes are arranged between the upper fixing plate and the lower fixing plate, each spiral pipe is of a three-dimensional net-shaped structure formed by welding metal wires, and the spiral pipes are used for making contact with fluid entering the tank body. The spiral defoaming and exhausting device has a continuous exhausting function, can greatly shorten the starting time after primary water injection in a corresponding system, does not need to be emptied, efficiently removes microbubbles and a large amount of free gas, prolongs the service life of equipment, solves the problems of oxygen corrosion, water pump cavitation and the like in the system, and enables the system to operate efficiently.

The application is a honeycomb concrete wave-absorbing structure based on a full-dielectric phase gradient metasurface, which is composed of a base fiber honeycomb concrete and a top full-dielectric phase gradient metasurface structure. The base fiber honeycomb concrete is divided into a multi-layer structure by different contents of wave-absorbing agents, the impedance matching is adjusted by changing the content and type of the wave-absorbing agents, and the function of maximum absorption of electromagnetic waves is achieved. The fiber wave-absorbing honeycomb woven by wave-absorbing fibers enables the concrete to have good toughness and strength, and achieves the dual effect of synergistic enhancement of wave-absorbing and mechanical properties. The size and shape of the micro units in the full-dielectric phase gradient metasurface can be flexibly adjusted, different micro units are combined, electromagnetic waves produce different phases, and the purpose of flexibly adjusting the electromagnetic wave-absorbing performance of different frequency bands is achieved. Through the combination of 3D fiber honeycomb structure, multi-layer wave-absorbing structure and metasurface and other factors, the optimal electromagnetic wave-absorbing structure is prepared, and the requirements of thin, light, wide and strong of the electromagnetic wave-absorbing material are met.