403 results about "High-temperature corrosion" patented technology

The invention discloses an integrated preparation method of a SiC-based composite material environment barrier coating in the technical field of aviation thermal structure materials, which comprises the following steps: cleaning a substrate, carrying out vacuum impregnation of phenolic resin and curing, coating Si slurry to form a bonding layer, coating rare earth silicate slurry to form a barrier layer, and drying to obtain the SiC-based composite material environment barrier coating. And finally carrying out high-temperature heat treatment in an inert atmosphere. According to the method, through an integrated slurry coating and gradient curing process, the performance of a base body is protected, and meanwhile efficient preparation of the coating is achieved; by adopting an integrated slurry coating and gradient curing technology and combining with an optimized medium-temperature sintering process, the matrix performance is effectively protected while the compactness of the coating is ensured, the bonding strength and interface stability of the coating are improved through the design of the phenolic resin transition layer and the silicon bonding layer in cooperation with the rare earth silicate barrier layer, and the bonding strength of the coating is improved. And the coating shows excellent protection performance in a high-temperature corrosion environment.

The invention discloses a stretch-bending composite fatigue test device and method for an engine blade (centrifugal impeller) simulation sample in a high-temperature corrosion environment. The device comprises an axial load system, a transverse vibration system, a temperature control system and a measurement system. The axial load system applies an axial pull-pull load to the simulation sample through a pin, the transverse vibration system provides a transverse bending vibration load for the simulation sample, the temperature control system provides the temperature of an engine in a real working environment for an examination part of the simulation sample, and meanwhile, according to the tension-bending composite fatigue test requirement, the test accuracy is improved. A simulation sample is designed according to a local position load of an engine blade (centrifugal impeller), a salt mist spraying / deposition mode is adopted on the surface of the sample to simulate a sea salt mist corrosion environment, the real stress, temperature and corrosion environment of an engine are accurately reflected, and the test can more accurately simulate the stretch-bending composite fatigue condition of a dangerous part in the working process.

The invention relates to the technical field of rare earth metal electrolysis cathode protection coatings, in particular to a high-temperature-corrosion-resistant yttrium-stabilized zirconia gradient coating on the surface of a tungsten cathode. A metallurgically bonded strong bonding bottom layer is constructed on a tungsten substrate through surface pretreatment and reactive sintering, then an atmosphere plasma technology is adopted to spray a creep-resistant gradient layer with continuous components to buffer thermal stress, and finally a sol-gel technology is utilized to construct an extremely compact corrosion-resistant surface layer in a superposition mode. The high-temperature-corrosion-resistant yttrium-stabilized zirconia gradient coating is constructed through a multi-scale and multi-mechanism synergistic effect, the problems that a tungsten cathode coating is insufficient in binding force and poor in thermal shock resistance are fundamentally solved, molten salt permeation can be blocked, and the service life of a tungsten cathode in a severe environment is remarkably prolonged.

Device for monitoring and controlling the high-temperature corrosion of water-cooled walls of a wall-like cut-circle boiler, characterized in that it comprises the following: a creation module for a meshed model, which serves to obtain a structure of the water-cooled wall of the wall-like circular boiler and to create a meshed model based on the structure of the water-cooled wall of the wall-like circular boiler; a creation module for a correlation model, which serves to obtain real-time parameters of the water-cooled wall of the wall-like circular vessel and to create a correlation model corresponding to the real-time parameters in combination with the networked model; a creation module for a three-dimensional model, which serves to simulate with the CFD data and the corresponding model in order to obtain the three-dimensional model of the temperature field and the CO field in the combustion chamber; a detection module for opening angles, which serves to obtain the deflection angles of various primary air nozzles and secondary air nozzles at different air volumes within the temperature field in the combustion chamber and the flap openings at different air volumes within the CO field on the basis of the three-dimensional models of the temperature field and the CO field of the combustion chamber; an adjustment module for deflection angles, which serves to obtain the optimal deflection angles of the primary air nozzles and the secondary air nozzles for the real-time air volume and the current temperature field in the combustion chamber based on the temperature and the real-time air volume at the appearance of the flame wall brushing in the boiler; an adjustment module for damper openings, which serves to obtain an optimal damper opening for the real-time air volume and the current CO field based on the CO concentration and the real-time air volume in the boiler.

A corrosion inhibitor composition includes a fatty acid ethoxylate, a thiourea, an arylthiourea, a thiazole, and two or more solvents. A metal article in contact with the composition has a corrosion rate of about 25 to about 45 mils penetration per year (mpy), as determined by an ASTM G111 standard test method. A method for inhibiting corrosion of a metal in contact with a corrosive fluid.

The invention discloses a preparation process of a sintering kiln silicon carbide guide roller with thermal shock resistance and high-temperature corrosion resistance. The process comprises the following steps: sequentially carrying out surface pretreatment such as reticulate pattern laser engraving, sand blasting and cleaning and drying on a silicon carbide guide roller substrate; performing plasma spraying on a pure aluminum oxide coating after preheating; carrying out segmented laser remelting on the coating to improve the compactness; and finally, coating the nano silicon carbide slurry, calcining and curing. The thermal shock resistance and the high-temperature corrosion resistance of the guide roller are remarkably improved by enhancing the binding force of the coating through laser engraving, optimizing the density of the coating through laser remelting and combining post-treatment of nano silicon carbide slurry, and the service life of the guide roller in a lithium battery positive electrode material sintering kiln is prolonged.

The invention belongs to the field of optimal design of soluble bridge plugs, and particularly relates to a method for simulating bridge plug corrosion in a variable-temperature and variable-pressure environment through a multi-field coupling model. The method comprises the following steps: S1, designing each part of the bridge plug; s2, establishing a stress corrosion model of the bridge plug; s3, establishing a high-temperature corrosion model of the bridge plug; s4, evaluating the corrosion rate of the bridge plug; s5, predicting the stress corrosion failure time of the bridge plug; and S6, carrying out secondary optimization and analysis on the bridge plug structure. According to the invention, the setting time of the bridge plug can be predicted and materials can be optimized according to engineering requirements under the condition of variable-temperature variable-pressure corrosion. According to the method, bridge plug performance evaluation and optimization links are designed, construction of a bridge plug alloy material corrosion model in a high-temperature and high-pressure corrosion environment is completed, and reproduction of a corrosion mechanism is achieved through a multi-field coupling corrosion model. Calculating the corrosion rate of the bridge plug and the failure time of the bridge plug caused by stress corrosion, predicting the setting failure of the bridge plug caused by the stress corrosion, and optimizing the structure of the bridge plug part.

The invention provides a gradient self-repairing sealing coating and a preparation method thereof, and relates to a high-temperature protection material. The gradient self-repairing sealing coating comprises a bonding layer, a gradient middle layer, a transition layer and an abradable surface layer which are sequentially arranged from a base body to the surface. A bonding layer in the gradient self-repairing sealing coating contains silicate, so that the bonding strength and the heat-resistant stability of a matrix are improved; rare earth silicate and Ir elements are introduced into the gradient intermediate layer, so that high-temperature corrosion resistance is enhanced, and thermal stress is relieved; the transition layer contains zirconium oxide and graphene and has the functions of thermal isolation and stress regulation; the abradable surface layer is formed by combining rare earth silicate and graphite, low friction and preferential abrasion are achieved, and effective sacrifice protection is provided. The overall structure can have multiple properties of heat, corrosion resistance and abrasion resistance, and is suitable for the surface protection requirement under the complex hot end working condition.

The invention belongs to the technical field of boiler heating surface high-temperature corrosion monitoring, and relates to a boiler heating surface high-temperature corrosion online monitoring method and system based on data fusion. The method comprises the following steps: acquiring an electrochemical signal, infrared thermal image data and acoustic emission characteristics of a key corrosion sensitive area of a boiler heating surface; based on data collected by a sensor network, a corrosion rate dynamic prediction model composed of a physical driving sub-model and a data driving sub-model is adopted to obtain a final corrosion rate prediction value; fusing the infrared thermal image data and the acoustic emission features, calculating a regional corrosion risk confidence coefficient according to the fused infrared thermal image data and acoustic emission features, and outputting a confidence coefficient level according to the regional corrosion risk confidence coefficient; and outputting an early warning signal according to the final corrosion rate predicted value and the confidence level, and dynamically adjusting combustion parameters. Accurate prediction of high-temperature corrosion of the boiler heating surface is realized, and corrosion development of the boiler heating surface is actively inhibited.

The invention discloses a high-temperature-resistant and corrosion-resistant coating for an aluminum alloy heat exchange tube and a preparation method thereof, and relates to the technical field of coating materials. The method comprises the following steps that the aluminum alloy heat exchange tube is cleaned and deoiled, then a treating agent is sprayed, composite coating slurry is sprayed to the surface of the aluminum alloy heat exchange tube after curing, and the high-temperature-resistant and corrosion-resistant coating for the aluminum alloy heat exchange tube is obtained after curing treatment. Wherein the treating agent is prepared from NS-30 silica sol, deionized water and methyltrimethoxysilane; the composite coating slurry is prepared from a polyamide acid solution, a synergist, functionalized boron nitride nanosheets, modified hexagonal boron nitride, a flatting agent and a defoaming agent. The silane film introduced into the treating agent and the synergist, the functionalized boron nitride nanosheet and the modified hexagonal boron nitride introduced into the composite coating slurry effectively improve the high temperature resistance, the corrosion resistance, the adhesive force, the thermal conductivity, the aging resistance and the toughness of the coating. Therefore, the method has a wider application prospect.

The invention discloses a high-temperature-corrosion-resistant stainless steel gas distribution disc and a preparation method thereof, and relates to the technical field of stainless steel machining, stainless steel is subjected to micro-arc oxidation treatment, the high temperature resistance and wear resistance of the surface of the stainless steel are improved, but the corrosion resistance of the stainless steel subjected to micropore treatment needs to be improved. Stainless steel subjected to micro-arc oxidation treatment is subjected to titanium dioxide layer plating treatment, micro-arc oxidation holes provide additional anchoring points, titanium dioxide layer plating treatment is carried out on the basis, the corrosion resistance of the stainless steel is improved, micro-arc oxidation treatment is firstly carried out on the surface of the stainless steel, then titanium dioxide is plated on the surface of the stainless steel, and the corrosion resistance of the stainless steel is improved. And the binding force between the titanium dioxide layer and the stainless steel substrate can be obviously improved. The graphene oxide-titanium dioxide composite sol is added into the electroplating solution, invasion of corrosive media is effectively blocked, the diffusion path of the corrosive media is prolonged through the graphene sheet layer, and the corrosion resistance of the stainless steel is further improved.

The invention relates to the technical field of lubricating oil, in particular to high-temperature-corrosion-resistant lubricating oil and a preparation method thereof. The high-temperature-corrosion-resistant lubricating oil is prepared from the following raw materials in parts by mass: 130 to 190 parts of base oil, 1 to 5 parts of an anti-wear reagent at extreme pressure, 1 to 5 parts of amino modified graphene, 0.1 to 1 part of an anti-rust agent, 1 to 3 parts of an antioxidant, 0.1 to 1 part of a de-foaming agent, 5 to 15 parts of trioctyl trimellitate, 1 to 5 parts of sodium lignin sulfonate and 1 to 5 parts of sodium bentonite. The high temperature resistance and the viscosity-temperature performance of the lubricating oil can meet the use requirements of a bearing under the working conditions of high speed, high temperature and large load, the wear resistance and the friction reduction of the lubricating oil at high temperature are effectively improved, and meanwhile the preparation method is simple and suitable for large-scale popularization and application.

The invention discloses an anti-falling high-temperature-corrosion-resistant coating, a material, a preparation method and application, and belongs to the technical field of pipeline corrosion prevention. According to the anti-falling high-temperature-corrosion-resistant coating material disclosed by the invention, V, Ta and Mo are doped into Cr and Al to generate lattice expansion of different degrees, so that the phase structure stability of a coating is favorably improved, and the oxidation resistance is enhanced; all the elements and Cr synergistically play a role, so that the thermal stability of the whole structure is improved, and the oxidation resistance of the coating in a high-temperature steam environment is remarkably improved; meanwhile, the coating material can form a metallurgically bonded coating on the surface of a base material, the bonding force of the coating and the base material is remarkably improved, the oxidation resistance can be remarkably improved when the coating material serves in a high-temperature steam environment, and the problem that an existing coating is prone to falling off is solved.

The invention discloses an adjusting method and device for reducing high-temperature corrosion of a water cooling wall of an opposed firing boiler, and the method comprises the steps: testing the sulfur content of coal as fired, and controlling the sulfur content of the coal as fired; the opening degree or the rotating speed and the ventilation quantity of a baffle of a separator of the coal mill are adjusted, and the primary air speed, the pulverized coal fineness and the uniformity index value of each layer of combustor are adjusted to be within the required range; the boiler operation oxygen amount, the opening degree of a secondary air box and the opening degree of an over-fire air door are adjusted, and the excess air coefficient of a main combustor area is controlled; the opening degree of internal and external secondary air and the rotational flow strength of a main combustor of the boiler are adjusted, a secondary air door in the combustor is fully opened, the rotational flow angle of the internal secondary air is adjusted to be minimum, the rotational flow angle of the external secondary air of the combustor close to two side walls is adjusted to be smaller, and meanwhile the external secondary air volume is increased. After adjustment, pulverized coal airflow deflection wall-attaching combustion is relieved, air supply in the initial stage of combustion is increased, H2S generation is reduced, and meanwhile the air supply amount of a flowing dead zone of the opposed firing boiler and the isolation capacity of a wall-attaching air film on pulverized coal airflow deflection wall-attaching are also increased.

The invention belongs to the technical field of thermal power heating surface treatment, and provides a boiler heating surface high-temperature corrosion protective coating and a preparation method thereof in order to solve the technical problems that in the prior art, a nano ceramic coating and a metal alloy coating for treating thermal power boiler heating surface high-temperature corrosion are insufficient in adhesive force, prone to falling off and short in protection service life. Through multi-layer structure design and technological parameter optimization, a coating system has continuous thermal expansion coefficient gradient distribution in the interval of 500-900 DEG C, the metal bonding layer at the bottom layer has a pore structure which can effectively absorb thermal stress, the nano ceramic layer at the surface layer can maintain high-temperature stability, and it is verified that the overall bonding strength is larger than or equal to 35 MPa, and the thermal expansion coefficient is larger than or equal to 10%. Compared with a traditional single-layer coating, the adhesive force is improved by 200% or above, and therefore the technical problems that in the prior art, adhesive force is insufficient, thermal stress is not matched, and high-temperature softening fails can be effectively solved.

The invention discloses a starting and stopping method of a fused salt steam generator system and electronic equipment, and relates to the technical field of fused salt energy storage. The method comprises the following steps: opening a water feeding adjusting valve of the deaerator, opening an inlet valve of the electric pump, and opening a recirculating valve of the electric pump; closing an electric pump to a steam generation system water inlet valve, closing a steam generation system water feeding main valve, and closing a steam generation system water feeding regulating valve; an electric pump is started to a steam generation system water inlet valve, a steam generation system water feeding adjusting valve is opened, a steam generation system emptying valve is opened, and a steam generation system steam outlet valve is closed; the steam generation system is pre-warmed; the molten salt system is pre-warmed through the molten salt system electric heat tracing device; and the cold salt pump outlet valve and the hot salt pump outlet valve are controlled to be closed, the cold salt pump recirculation valve is controlled to be opened, the cold salt pump is started, the cold salt pump outlet valve is started again, and salt is injected into the fused salt pipeline. The problems of high-temperature corrosion, solidification and the like in the starting process of the molten salt steam generator system are solved.

The invention belongs to the technical field of heat-engine plant unit circulation component surface corrosion prevention, and discloses a high-temperature-corrosion-resistant coating material, a coating and a preparation method and application thereof.The preparation method comprises the steps that by mass, 10%-20% of Cr, 1%-5% of Ni, 2%-10% of Fe, 10%-30% of molybdenum, 20%-40% of copper and 10%-20% of silicon are mixed to be uniform, a pipeline is embedded, heat treatment is conducted, and an initial chromium-rich infiltrated layer is formed; and then nitriding treatment is conducted on the initial chromium-rich nitriding layer, and the high-temperature-corrosion-resistant chromium-nitrogen composite coating is formed. The added silicon can form silicides in the coating, and the silicides can prevent the corrosion medium from permeating, so that the corrosion process is slowed down or prevented; the added molybdenum can effectively improve the stability of the composite coating in a corrosion medium rich in sulfate ions; and the added copper can form a protective layer consisting of copper sulfide or copper oxide on the surface of the steel, so that the corrosion of a corrosive medium is effectively prevented.

The present invention discloses an Al2O3 modified Yb2Si2O7 material for a hot end component surface environmental barrier coating, and its preparation method and application, belonging to the field of environmental barrier coating. The material is synthesized by a solid phase reaction combined with a sintering process. The obtained material contains both Yb2Si2O7 and Yb3Al5O 12 Compared with undoped Yb2Si2O7, the doped material is denser, has lower porosity and higher density, and at the same time, Yb3Al5O will be generated at high temperature after doping. 12 It will effectively improve the high-temperature corrosion resistance of Yb2Si2O7, increase its service life, and has good application prospects.

The invention belongs to the technical field of boiler heating surface high-temperature corrosion monitoring, and relates to a boiler heating surface temperature monitoring method and system based on dynamic heat flux density monitoring. The method comprises the steps of obtaining temperature field data of a plurality of monitoring areas of a boiler heating surface; constructing an improved Tikhonov regularization algorithm based on the temperature field data, and carrying out heat flow field reverse solution by adopting the improved Tikhonov regularization algorithm to obtain reconstructed heat flow field distribution and a heat conduction nuclear matrix after regularization optimization; and generating a temperature evolution trend by adopting a GRU prediction model based on an attention mechanism based on the reconstructed heat flow field distribution and the regularized and optimized heat conduction nuclear matrix. The method can accurately predict the temperature evolution trend through obtaining the comprehensive temperature field data, facilitates the real-time monitoring of the temperature of the heating surface of the boiler, and improves the safety and reliability of the operation of the boiler. Operation personnel can adjust operation parameters in time according to a prediction result, and the operation state of the boiler is optimized.

The present invention relates to a method for manufacturing a part (1) with improved resistance to oxidation and high-temperature corrosion, comprising at least the deposition of a non-cracked crystalline β-Yb2Si2O7 environmental barrier layer (7) on an at least partially ceramic matrix composite material (3), wherein the environmental barrier layer is deposited by chemical vapour deposition from a gas phase comprising a precursor mixture of (a) a compound A of formula SiClxHy, in which x is an integer from 1 to 4 and y is an integer from 0 to 3, with x + y = 4, and (b) elementary ytterbium or ytterbium(III) chloride, and wherein, during deposition, a temperature between 1100°C and 1300°C and a pressure of 150 mbar or less are imposed.

The present invention discloses a probe device and method for testing the high-temperature corrosion resistance of the metal material of the heating surface of a waste incineration boiler, which can be used to conduct an online high-temperature corrosion simulation test of the heating surface in the furnace of a waste incineration power plant. The present invention realizes the controllability of the temperature of the test piece through the gas reflux design of the inner and outer sleeves and the independently sealed internal space. In order to avoid the influence of galvanic corrosion caused by direct contact of different metals due to connection methods such as welding or threads on the experimental results, the present invention adopts a split tightening clamp flange as a connecting component connecting the test piece and the main body of the device, and fills a high-temperature resistant rubber gasket between the flange and the test piece as a barrier layer. This also ensures the good sealing of the device and realizes the convenient disassembly and assembly of the test piece. The present invention has a simple design, is easy to carry, and has a wide range of uses. It can realize the test of the high-temperature corrosion resistance of different metal materials in waste incineration power plants, and is suitable for on-site research on high-temperature corrosion of boiler heating surfaces.

The invention discloses a supersonic speed electric arc spraying wear-resistant and corrosion-resistant coating material and a preparation method, the supersonic speed electric arc spraying wear-resistant and corrosion-resistant coating material is composed of the following components of, by mass, 60-75 parts of NiCr alloy, 15-25 parts of WC-Co, 5-10 parts of Al2O3-TiO2 composite ceramic powder and 1-3 parts of rare earth oxide Y2O3, a coating is of a gradient composite structure, and the NiCr alloy and the WC-Co are distributed in a gradient mode according to the spraying layer number. The preparation method comprises the steps that the surface of the base body is subjected to sand blasting roughening treatment; a supersonic speed electric arc spraying device is adopted for spraying, the electric arc current is controlled to range from 130 A to 210 A, and the spraying distance ranges from 80 mm to 150 mm; and coating hole sealing treatment. Through a composite metal-ceramic material system and a rare earth element grain refinement effect and in combination with a supersonic spraying process, the compactness (porosity is smaller than or equal to 1.5%) of the coating is remarkably improved, the bonding strength of the coating is larger than or equal to 50 MPa, the HV hardness is larger than or equal to 800, the service life in a high-temperature corrosion environment is prolonged by three times or above, and the coating is suitable for surface protection under severe working conditions such as a boiler water cooling wall.

The invention discloses a corrosive wear test device which comprises a frame, a lifting system, a heating furnace and a kettle body arranged in the heating furnace, and a kettle cover is fixedly arranged on the frame above the kettle body; a magnetic coupling stirrer is arranged on the kettle cover, a sample holder is arranged below the kettle cover, the sample holder comprises more than two groups of spaced clamps, each group of clamps comprises an upper fixing disc, a lower fixing disc and a plurality of samples, and a plurality of flow baffles which are arranged at intervals in the circumferential direction are arranged between the lower fixing discs and the upper fixing discs of two adjacent groups of clamps; a plurality of fixing rods are connected with all the upper fixing discs and the lower fixing discs and are fixedly connected with the kettle cover; a stirring rod of the magnetic coupling stirrer penetrates through the kettle cover, all the upper fixing discs and all the lower fixing discs, the lower end of the stirring rod is fixedly connected with a folding turbine paddle, and the stirring rod is fixedly connected with a straight paddle; the device not only can ensure that the scouring medium at each position in the device is uniform and stable, but also can perform synchronous test on a large batch of samples, can accurately evaluate the material performance under the severe working conditions of high temperature, corrosive medium and erosive wear, and is convenient to mount and dismount.

The invention relates to the technical field of metal coating preparation, in particular to an integrated preparation method of a high-temperature-corrosion-resistant coating on the surface of a high-densification nickel-based alloy. According to the method, Inconel 718 powder serves as a raw material, a nickel-based component is printed on a substrate firstly, then AlSi10Mg powder serves as a raw material immediately, and an AlSi10Mg layer is printed on the obtained printed nickel-based component; and obtaining a printed product. Sequentially carrying out two times of heat treatment on the printed product to obtain a product; the solution treatment temperature is 1050-1150 DEG C for the first time, and the aging treatment temperature is 700-750 DEG C for the second time. The obtained product has excellent thermal corrosion resistance, the preparation method is simple and controllable, and industrial application is facilitated.

The invention belongs to the technical field of heat-engine plant unit circulation component surface corrosion prevention, and discloses a Cr / Ni-Cr-based high-temperature-corrosion-resistant coating material, a coating, a preparation method and application, the coating material comprises a solid-phase component and a liquid-phase component, the solid-phase component comprises, by mass, 40-80% of Cr, 5-30% of Ni, 2-20% of Fe, 1-3% of Al, 1-6% of Ti, 0.5-4% of Zr and 0-3% of Co; the liquid-phase component comprises aluminum dihydrogen phosphate, water glass and a curing agent. And the Cr / Ni-Cr-based high-temperature-corrosion-resistant coating material is sprayed to the preheated pipeline surface, dried, cured and sintered at the temperature of 850-1050 DEG C, and the Cr / Ni-Cr-based high-temperature-corrosion-resistant coating is formed. According to the coating prepared through the method, the metal material can show excellent performance in the aspects of high temperature resistance, corrosion resistance, abrasion resistance, fatigue resistance and the like, the reliability is improved, and the service life is prolonged.

The invention discloses a high-flame-retardant temperature-resistant corrosion-resistant optical fiber composite cable and a preparation method thereof, and belongs to the technical field of cable manufacturing, and the high-flame-retardant temperature-resistant corrosion-resistant optical fiber composite cable sequentially comprises an optical fiber unit, a conductor layer, an insulating layer, a shielding layer, a corrosion-resistant layer and a sheath layer from inside to outside. The optical fiber unit adopts a ceramic silicone rubber buffer layer; the conductor layer is a nickel-plated copper alloy stranded wire, and the oxidation resistance is enhanced through nano titanium dioxide sol treatment; the insulating layer is of a three-layer co-extrusion structure; the shielding layer adopts an aluminum-plastic composite belt and tinned copper wire braided composite structure; the anti-corrosion layer is a polytetrafluoroethylene film subjected to plasma treatment; the sheath layer is made of two-component ceramic silicone rubber, is flexible after being vulcanized at normal temperature, and is converted into a ceramic body at high temperature. According to the optical fiber composite cable, through the collaborative design of a multi-layer structure, the performance of excellent continuous use stability, high salt mist environment corrosion resistance and the like is achieved, the optical fiber composite cable is suitable for high-temperature, corrosion, fire and other severe environments, and the safety and durability of the composite cable are remarkably improved.

The utility model discloses a multilayer sealed end cover structure of a vibration motor, relates to the technical field of vibration motor structures, and aims to solve the problems that an end cover of a conventional vibration motor generally has only one layer, is single in structure and only has basic protection and support, and the whole end cover needs to be replaced when the end cover is damaged, so that the cost is relatively high. The protective cover further comprises a first-layer ring wall, an end cover and a second-layer ring wall, the second-layer ring wall is arranged in the first-layer ring wall, the second-layer ring wall and the first-layer ring wall are detachably connected, a division bar is arranged between the first-layer ring wall and the second-layer ring wall, and the end cover is fixed to the first-layer ring wall through a bolt. Through the design of the double-layer ring wall of the protective cover, different materials can be selected according to the use conditions of the inner layer and the outer layer, so that a better protective effect is achieved; and after being independently abraded and corroded, the inner layer or the outer layer can be independently replaced, the maintenance cost is reduced, and layered protection can be customized for dust, high temperature, corrosion and the like.

The utility model discloses a rare earth metal electrolysis tapping casting device. The device comprises a discharging unit and a casting unit, wherein the discharging unit is used for transferring electrolyzed rare earth metal liquid to the casting unit; the discharging unit comprises a discharging spoon, a pushing mechanism, a lifting mechanism and a rotating mechanism; one end of the propelling mechanism is connected with the furnace discharging spoon, and the propelling mechanism is used for pushing the furnace discharging spoon to move and scooping rare earth metal liquid; one end of the lifting mechanism is fixed to the part, away from the furnace discharging spoon, of the pushing mechanism and located below the pushing mechanism, and the other end of the lifting mechanism is arranged on the rotating mechanism; the rotating mechanism is arranged to be capable of horizontally rotating so as to drive the furnace discharging spoon to rotate in the horizontal direction; the casting unit comprises a casting mechanism, the casting mechanism comprises a mold, and the mold is used for receiving rare earth metal liquid and forming. According to the device, the control process is simple, full-automatic operation can be achieved, and machine body failure caused by factors such as high temperature and corrosion is avoided.

The invention provides a combustion control system and equipment under deep peak regulation of a coal-fired power plant, and belongs to the technical field of coal-fired boilers. According to the system and the equipment, real-time operation data and exhaust gas component data of a boiler are obtained; then calculating the exhaust gas component data by using a preset calculation model to obtain real-time fired coal quality information; and finally, real-time optimal control parameters are determined according to the real-time in-boiler coal quality information and the operation data, and dynamic control is conducted on the boiler through the real-time optimal control parameters, so that combustion optimization under deep peak regulation is achieved. According to the method, boiler exhaust smoke gas components are monitored and analyzed in real time, in-boiler coal quality information is accurately obtained in combination with a preset calculation model, and combustion control parameters are dynamically adjusted accordingly, so that the influence of coal quality changes on regulation and control of a coal pulverizing system, the theoretical air amount and key operation parameters is effectively solved, and the coal pulverizing efficiency is improved. And meanwhile, the safety risks such as ash deposition, slag bonding and high-temperature corrosion of the hearth are reduced, and the safety and economical efficiency of a coal-fired unit are improved.

The invention provides a coal water slurry gasification system and method taking biomass as a raw material, and belongs to the technical field of biomass green low-carbon utilization. The problem that high-temperature corrosion of equipment is caused in the biomass utilization process due to the fact that the chlorine content in biomass, especially crops, is high is solved. The system comprises a biomass pretreatment unit, a pulverization unit, a pulping unit, a gasification unit and a synthesis gas treatment unit which are connected in sequence. The method is mainly used for biomass treatment and resource utilization.