282 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 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.

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 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 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 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 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 invention discloses a near-wall air device for preventing high-temperature corrosion of a front and back wall hedging pulverized coal boiler, and relates to the technical field of application of near-wall air of pulverized coal boilers. The close-to-wall air device for preventing the high-temperature corrosion of the front and rear wall hedging pulverized coal fired boiler comprises a close-to-wall air nozzle arranged on the side wall of a hearth, the hearth comprises a furnace wall, the side wall of the hearth is provided with a plurality of wall-type arranged over fire air nozzles and wall-type arranged burner nozzles, and the close-to-wall air nozzle is arranged on the side wall of the furnace wall in a penetrating mode. By means of the wall-attached air nozzles, in the using process, according to the requirement for preventing high-temperature corrosion of the boiler in the reducing atmosphere, multiple layers of wall-attached air can be arranged on the wall face of the side wall of the hearth, each layer of wall-attached air comprises the multiple wall-attached air nozzles, and the area, prone to high-temperature corrosion, of the wall face of the boiler can be completely covered; the oxidizing atmosphere of the near-wall area is formed, the risk of high-temperature corrosion of the water cooling wall is effectively avoided, and meanwhile the air volume corresponding to each piece of near-wall air can be adjusted according to actual needs.

The invention provides a high-temperature-erosion-resistant Fe-based amorphous coating welding wire and a preparation method, and belongs to the technical field of metal materials. The welding wire comprises a flux core and a welding skin. Wherein the flux core comprises 25%-28% of Cr powder, 23%-25% of Nb powder, 8%-10% of B powder, 8%-10% of Si powder, 15%-17% of Mo powder, 8%-10% of W powder and the balance Fe powder; and the welding skin is a Fe60Cr40 steel strip. According to the novel Fe-Cr-Nb-B-W-Si-Mo series amorphous alloy welding wire, by optimizing the proportion of multiple components, the coating is endowed with excellent wear resistance, high temperature corrosion resistance and erosion resistance while the high amorphous content is ensured. The welding wire can adopt a conventional electric arc surfacing process, efficient protection of the surface of the water cooling wall is achieved under the low-cost condition, and an innovative solution is provided for long-acting protection of key components of a power plant.

The application provides a surface-coated anti-corrosion dioxin-resistant silicon carbide wear-resistant powder material, and relates to the technical field of silicon carbide materials. The material takes cubic crystal type beta-SiC nano powder as a matrix, realizes the combination of high-temperature corrosion resistance, high wear resistance and high-efficiency dioxin prevention by constructing a gradient coating structure of 'Si-O-C transition layer / ZrO2-Al2O3-Y2O3 middle layer / SiO2-rare earth oxide-phosphotungstic acid multifunctional outer layer'. The preparation method of the material comprises key steps of matrix etching, transition layer construction, hydrothermal deposition and atmosphere calcination, and the process is controllable and has good repeatability. The obtained powder has excellent long-term protection performance, good dispersibility and stable structural integrity, and is suitable for fields of wear-resistant coating, composite reinforcement and waste gas treatment in harsh environments.

The present invention relates to a composite dechlorination system for treating domestic waste gasification, comprising a gasifier and a composite dechlorination system. The composite dechlorination system comprises a chlorine coarse filtration device and a cyclone separator dechlorination device. The chlorine coarse filtration device comprises a plurality of filter plates arranged from top to bottom within the gasifier, and a calcium injection port disposed on the gasifier. One end of the filter plate is connected to the gasifier, and the filter plate is arranged to tilt downward from a fixed end to a free end. The gasifier comprises a gasification reaction layer and a filter layer for accommodating the chlorine coarse filtration device. The filter layer is disposed on top of the gasification reaction layer, and the calcium injection port is disposed at the gasification reaction layer. The present invention provides a composite dechlorination system for treating domestic waste gasification, which directly dechlorinates the combustible gas after it is generated in the gasifier, thereby preventing high-temperature corrosion of subsequent equipment by the combustible gas, thereby improving steam parameters and power generation efficiency, and helping to reduce the low-temperature heterogeneous catalytic synthesis of dioxins during flue gas cooling.

The utility model provides an independent circulation pipeline evaporator which comprises an ascending pipe connected to a steam pocket; the first evaporation screen is communicated with the ascending pipe through a first ascending communicating pipe, the first evaporation screen comprises a plurality of first pipe pieces, and the first pipe pieces are arranged on two flues in parallel; each first duct piece is arranged in a bow shape in the vertical direction, so that the heating area of each first duct piece is increased, and meanwhile, a steam soot blower can penetrate through each first duct piece and carry out decoking and soot cleaning on each first duct piece; the first descending communicating pipe is connected between the first evaporation screen and a descending pipe, and the descending pipe is connected to the bottom of the steam pocket and used for conveying water in the steam pocket to the first descending communicating pipe and then conveying the water to the first evaporation screen. The problems of overtemperature and high-temperature corrosion of the superheater mentioned in the background technology are solved.

The utility model relates to an automatic asphalt sampler cleaning machine which can effectively solve the problems that manual cleaning efficiency is low, and particularly when a large number of samplers need to be cleaned, manual cleaning can consume a large amount of time and manpower and is poor in safety. The high-temperature-resistant anti-corrosion pump is communicated with a plurality of first branch pipes arranged below a support in the middle of the shell through a first pipeline and communicated with a plurality of second branch pipes arranged at the top of the shell through a second pipeline, the first branch pipes and the second branch pipes are provided with spray heads, and the high-temperature-resistant anti-corrosion pump is communicated with a liquid storage tank through a pipeline. Asphalt or residual oil adhering to the inside and the outside of the wall of the sampler is dissolved through heating of solvent oil and washing of high-pressure spray, the trouble that cleaning is difficult and the cleaning speed is low in the traditional manual cleaning process is completely replaced, the sampling basket can be washed and cleaned, and the automatic asphalt sampler cleaning machine is an innovation of the automatic asphalt sampler cleaning machine.

The invention belongs to the technical field of corrosion and protection, and particularly relates to a multi-atmosphere high-temperature stress corrosion tensile test device and method.The multi-atmosphere high-temperature stress corrosion tensile test device comprises a tensile testing machine, a temperature control device, a sample, a telescopic pipe and an air supply device; the tensile testing machine is provided with clamps which are symmetrically arranged up and down and are used for clamping a sample, and the clamps are provided with flange plates which are hermetically connected with the telescopic pipe; the sample is clamped on a tensile testing machine clamp; the temperature control device is used for heating and preserving heat of the test environment; two ends of the telescopic pipe are hermetically connected with an upper clamp and a lower clamp of the tensile testing machine through flanges; the telescopic pipe is sleeved outside the sample to isolate the sample from the outside; and the air supply device is connected with the telescopic pipe and is used for filling air into the telescopic pipe. Influence factors such as corrosive gas flow and temperature can be independently regulated and controlled, high-temperature corrosion tests in complex environments can be realized, and requirements of material performance tests under different working conditions are met; and the manufacturing cost is low.

The embodiment of the application provides a kind of high temperature contact-corrosion coupling model construction method, determine the type of high temperature contact corrosion and corrosion internal mechanism;Build force-chemical coupling theory model;Solve the force-chemical coupling theory model using finite element algorithm;Based on the result obtained by solving, build high temperature contact-corrosion coupling finite element model.The scheme, based on irreversible thermodynamics, establishes a force-chemical full-coupling high-temperature oxidation corrosion theory model considering the interaction of contact pressure, reactant (gaseous) diffusion and chemical reaction;The high-temperature corrosion model is realized by finite element using the pre-set UEL module, which can accurately simulate the corrosion evolution law, corrosion morphology characteristics, chemical reaction dynamic process in the contact area during high-temperature contact corrosion process, and the change of contact pressure with reaction process.Meanwhile, it can also accurately present the distribution of stress, strain, contact pressure, reactant and product concentration and other physical fields.

This invention provides an air supply and dust removal device for high-temperature corrosion prevention and control in coal-fired power plant boilers, comprising a cyclone separator and a microporous filter. The cyclone separator includes a separation shell, an air inlet, an exhaust outlet, and a first ash discharge outlet. The separation shell has a cylindrical separation chamber, and the air inlet, exhaust outlet, and first ash discharge outlet are respectively connected to the separation chamber. The air inlet is located at the upper part of the separation shell and is tangent to the outer wall of the separation shell. The exhaust outlet is located at the top of the separation shell, and the first ash discharge outlet is located at the bottom of the separation shell. The microporous filter includes a filter shell and a microporous filter element. The filter shell has an air inlet and an exhaust outlet, with the air inlet connected to the exhaust outlet. The microporous filter element is disposed inside the filter shell. The cyclone separator performs primary dust removal of large particles in the secondary air, and the microporous filter performs secondary dust removal of small particles in the secondary air, thereby achieving the removal of both large and small particles of dust in the secondary air.

The invention belongs to the technical field of high-temperature protective coatings, and particularly relates to an interface stable type metal bonding layer for a thermal barrier coating based on phase structure regulation and control and a preparation method of the interface stable type metal bonding layer. The main components of the metal bonding layer are Ni, Cr and Al, the aluminum content is 8-12 wt.%, the chromium content is 5-15 wt.%, the phase composition is gamma'single phase or gamma ' / gamma double phase, and no alpha-Cr or beta-NiAl phase is separated out. Through precise regulation and control of components and phase composition, preferential oxidation of a heterogeneous interface is inhibited, and the chemical potential difference between a coating and a substrate is reduced. In long-term high-temperature service, a single protective Al2O3 film is generated on the surface, no harmful brittle spinel oxide is generated, a strong bonding mixing area is formed between an oxide layer and a ceramic layer interface, and no obvious element mutual diffusion exists between the coating and a matrix. The method is simple in process, suitable for various high-temperature alloys and capable of being widely applied to high-temperature corrosion protection of hot-end components such as aero-engines and gas turbines, and the service life of the thermal barrier coating is remarkably prolonged.

The application provides a kind of air supply system for power station boiler high temperature corrosion prevention and control equipment, including secondary air main pipe, main pipe connecting pipe, prevention and control air main pipe, main pipe adjusting assembly, at least two shunt branch pipes and at least two groups of branch pipe adjusting assembly;Main pipe connecting pipe connects secondary air main pipe and prevention and control air main pipe, main pipe adjusting assembly includes the main pipe adjusting valve and pressure interlock controller of main pipe connecting pipe, pressure interlock controller is used for controlling the opening of main pipe adjusting valve according to the pressure in secondary air main pipe;Shunt branch pipe is connected with prevention and control air main pipe respectively, and a group of branch pipe adjusting assembly is correspondingly provided in each shunt branch pipe, and branch pipe adjusting assembly includes branch pipe adjusting valve and differential pressure interlock controller, and branch pipe adjusting valve is arranged in corresponding shunt branch pipe, and differential pressure interlock controller is used for controlling the opening of shunt branch pipe according to the pressure difference between inside and outside of corresponding shunt branch pipe.The system of the application supplies air continuously and stably, improves corrosion prevention and control effect, reduces operation and maintenance cost, prolongs the service life of pipeline.

Provided are a high-temperature corrosion-resistant stranded conductor and a method for manufacturing the same, which relate to the field of high-temperature conductor technologies. The stranded conductor is formed by twisting a plurality of composite wire monofilaments, each including a highly conductive core wire made of copper or a copper alloy, and a high-temperature corrosion-resistant alloy cladding the core wire. The stranded conductor is capable of maintaining strength and transmitting a signal under a high-temperature atmospheric environment below 1000° C. for an extended period of time. By employing a plurality of twisted composite wire monofilaments with the above structure, the conductor achieves high strength retention, stable electrical conductivity, and superior oxidation / corrosion resistance when operating long-term under operating conditions of 600° C. to 1000° C. This solves the technical problem of conventional conductors failing in high-temperature environments.

The invention relates to the technical field of rotary kiln equipment, in particular to a high-temperature-resistant alloy resistant to sulfur high-temperature corrosion in a trace oxygen atmosphere, a preparation method and a combined rotary kiln, and aims to solve the problems of short service life, high maintenance cost and the like caused by sulfur corrosion of the inner wall of a kiln body in the presence of trace oxygen in the calcination process of sulfur-containing petroleum coke. A partition composite structure design is provided, a high-temperature area (750-1050 DEG C) uses high Ni and Cr and high-temperature-corrosion-resistant element Mo and Y component alloy, a medium-temperature area uses high Ni and Cr component alloy, a low-temperature area uses low Ni and Cr component alloy, and local replacement is supported through modular segmentation design. According to the design, the sulfur corrosion resistance in the presence of trace oxygen is remarkably improved (the corrosion rate in a high-temperature area is reduced), the service life of equipment is prolonged by more than three times, the material cost is reduced by 65% compared with that of a high-nickel-based kiln body, and the maintenance cost is reduced by 40%. The method is suitable for the field of sulfur-containing petroleum coke calcination and the like, and has remarkable economic benefits and industrial application values.

The utility model discloses a complete cooling copper water jacket for a coal gasification hearth, which comprises an upper hearth water jacket, a lower hearth water jacket and a slag discharge port water jacket which are sequentially arranged on the inner wall of the hearth from top to bottom in the vertical direction, and the hearth water jacket comprises a conical wall body and a lower hearth connecting flange. The lower hearth water jacket comprises a horn-shaped wall body, an upper hearth connecting flange and a slag discharge port connecting flange, the lower hearth connecting flange and the upper hearth connecting flange are fixed through bolts, and the slag discharge port water jacket comprises a funnel-shaped wall body and a sealing flange. A cooling pipe circling along the wall body is arranged in each of the conical wall body, the horn-shaped wall body and the funnel-shaped wall body. The complete cooling copper water jacket for the coal gasification furnace solves the technical problems of poor high-temperature corrosion resistance, poor cooling effect, inconvenience in replacement, assembly and disassembly and short service life.