47results about How to "Improve long-term operational stability" patented technology

The invention relates to an iron catalyst which contains an assistant and used for catalyzing the Fischer-Tropsch reaction, which is characterized by comprising the components with mass ratios of Fe: Cu; K: Ti: SiO2 equal to 100: (0.1-10): (0.1-10): (0.01-5): (5-30), wherein, Fe, Cu, K and Ti exist in the form of oxides. The invention also relates to a preparation method for the catalyst, which comprises the steps that: at the presence of a precipitator with a pH value of 6-9, ferric nitrate, copper nitrate and a titanium compound are deposited in water; a deposit is separated and mixed with potassium carbonate and silica sol after being washed; a mixture obtained is dried and calcined. The iron catalyst with the assistant of titanium structure has relatively large specific surface area, CO conversion activation and antiwelding and antisulphour properties.

The invention discloses an extraction method of humic acid, namely an NF+UF extraction method of humic acid in percolate MBR+NF membrane trapped fluid. The extraction method is advanced, economic, free of secondary pollution and convenient and reliable to operate and has simple flow and small occupied area, and equipment used in the extraction method is simple.

The invention relates to a titanium-containing nickel-based catalyst, as well as a preparation method and application thereof. The titanium-containing nickel-based catalyst comprises NiO (A), vector (B), TiO2 (C) and at least one rare-earth metal oxide RE2O3 (D), wherein the vector comprises Al2O3. The invention also relates to a method for preparing the titanium-containing nickel-based catalyst, which comprises the following steps: (a) nickel cation, rare-earth metal cationic aqueous solution and titanium precursor aqueous solution are provided; (b) the solution in the step (a) is precipitated by using precipitator to obtain suspension or slurry; (c) the suspension or slurry obtained in the step (b) is separated to obtain solid precipitate, and the solid precipitate is mixed with alumina sol, or mixed with Al cationic aqueous solution to form sol; and (d) the sol is granulated and calcined to obtain a high-temperature methanation catalyst. The catalyst contains TiO2 structure auxiliary, so that the carbon deposit phenomenon in the methanation reaction is wakened.

The invention provides a preparing method of an alloy high temperature oxidation resisting nanostructure conductive coating, i.e. a spinel powder reduction coating method. On one hand, coating powdermaterial with favorable sintering performance is obtained by the regulation and control of the preparing process of coating powder material and effective reductive treatment; on the other hand, a nanometer microstructure film is prepared on the alloy surface by adopting silk screen assisted improved sizing agent coating technology. The film has controllable and even thickness and superior performance, and coating is tightly combined with the alloy; the coating alloy has lower area specific resistance (ASR) and higher long-time running stability under high temperature oxidation environment. Thespinel powder reduction coating method originated by the invention has simple film manufacturing method, low cost and strong repetitiveness, can be applied to coating preparation of alloy with different shapes or sizes, has superiority especially when preparing the large-area alloy coating in practical application, can greatly lower the preparing cost of the alloy coating and has strong applicability.

The invention provides a purification technology with a membrane separation strengthening function for hydrogen in high-hydrogen-content refinery gas through pressure swing adsorption, and belongs tothe field of petrochemical industry. According to the technology, an organic vapor membrane separation unit is added to a pre-treatment system of a pressure swing adsorption device, heavy hydrocarboncomponents of carbon 5 or above are efficiently and deeply removed, and the content of the heavy hydrocarbon components is reduced to 0.3 vol% or below; the regeneration conditions of an adsorption agent are improved, the service life of the adsorption agent is prolonged, and the long-term operation stability of the pressure swing adsorption device is improved; a hydrogen membrane separation unitis added to an after-treatment system, organic vapor membrane permeation gas is further recovered, and low-concentration hydrogen in tail gas is subjected to pressure swing adsorption, so that the content of hydrogen in fuel gas is lower than 15 vol%, and the total hydrogen yield exceeds 95%. By prolonging the service life of the adsorption agent and increasing the hydrogen recovery rate, by meansof the purification technology with the membrane separation strengthening function for the hydrogen in the high-hydrogen-content refinery gas through pressure swing adsorption, compared with a traditional adsorption technology, the hydrogen separation and purification cost of the technology can be reduced by 10-20%.

The invention relates to a coating production line and particularly relates to a coating water purification system which is realized by the following technical scheme that: the coating water purification system comprises a raw water tank, a raw water pump connected with the raw water tank, a mechanical filter connected with the raw water pump through a pipeline I, an active carbon filter connected with the mechanical filter, a high-pressure pump I connected with the active carbon filter through a pipeline II, and a reverse osmosis set I connected with the high-pressure pump I. Compared with the background technology, the coating water purification system is more energy-saving and environment-friendly and has lower cost.

A method of improving stability of a perovskite oxide cathode is provided. The method includes impregnating a Co / Fe based perovskite cathode with a perovskite / fluorite-phased composite precursor solution by adopting an ammonium citrate co-synthesis process, and performing calcination at a low temperature that is 800 DEG C to obtain perovskite / fluorite-phased composite nanometer particles. The composite nanometer particles have the perovskite and a cubic fluorite phase, are mixed ion-electron conductors, and are low in particle dimension and uniformly distributed in the cathode. Compared with a battery not impregnated, the battery after impregnation has significantly improved performance, and stability after long-term running for 500 h is obviously improved.

The invention discloses an amphoteric substance-based polyamide nanofiltration membrane surface modification method, and belongs to the field of membrane material modification. The technical problems that an existing nanofiltration membrane is not high enough in interception performance, the rejection effect of the membrane surface on pollutants is not large, and the actual service life is short are solved. The modification method comprises the following steps: (1) dissolving substances such as dopamine and 2-bromoisobutyryl bromide in an organic solvent, and conductiing mixing with a buffer solution to form a coating solution; (2) enabling one side of the active layer of the base membrane to be in contact with the coating solution, slowly conducting oscillating for a certain time, taking out the membrane, and storing the membrane in an isopropanol solution; and (3) grafting zwitterions on the surface of the composite membrane coated with polydopamine by virtue of a surface-initiated atom transfer radical polymerization method. The desalination performance, the selective separation performance and the anti-pollution performance of the modified polyamide composite membrane are remarkably enhanced, the treatment effect of the composite membrane in brackish underground water application is improved, and the service life of the composite membrane is prolonged.

The invention provides a continuous alternating MBBR sewage treatment method and equipment. The treatment method comprises the following steps: suspended granular impurities in sewage are removed by pretreatment, quality and quantity equilibrium treatment is performed on the sewage, then anaerobic phosphorus release and synchronous denitrification and nitrification treatment are performed on the sewage by adopting anaerobic / anoxic / aerobic alternating operation, and pollutant matrix removal efficiency is improved. The treatment equipment comprises a homogenization chamber, a facultative chamber, a transition chamber, a pre-denitrification chamber, an aerobic tank, an efficient sedimentation tank and an equipment control chamber which are communicated through a water pipeline, wherein ultraviolet disinfection equipment, a pipeline booster pump, a full-automatic filtering tank, an aeration fan and a PLC control device are arranged in the equipment control chamber. The treatment equipmentis high in integration degree and functionality and simple and convenient to mount and operate, occupies small area and has high space utilization rate, long-term operation stability of the equipmentis enhanced, and treatment energy consumption and operation and maintenance cost of the whole sewage treatment equipment are reduced.

The invention provides a double-parameter optical fiber sensing device for monitoring a magnetic field and temperature and an implementation method. The double-parameter optical fiber sensing device comprises an ASE light source (1), an optical fiber coupler (2), a sensing unit (3), a to-be-measured magnetic field module (4), a magnetizer (5), a photoelectric converter (6) and a signal processingmodule (7). According to the device and method of the invention, sensing is carried out through an optical fiber; the Fabry-Perot cavity principle is utilized, light emitted by the ASE light source generates an interference spectrum in a Fabry-Perot cavity; the interference spectrum is detected, so that the magnetic field and the temperature are measured; digital output is realized through the signal processing module, so that display by a computer is achieved. According to the device and method of the invention, the size of the sensing unit is reduced, the sensing sensitivity is increased, the cross influence of different parameters is reduced, and the purpose of simultaneously monitoring the magnetic field and the temperature is achieved. Meanwhile, the signals can be output on a host, and real-time monitoring of the magnetic field and the temperature is achieved.

The invention discloses an oil agent for a carbon fiber precursor. The oil agent comprises dimethyl silicone oil, amino silicon oil, polyether silicone oil and aliphatic polyoxyethylene ether, the oilagent is dispersed in water to form waterborne emulsion, the dimethyl silicone oil accounts for 60-80% of the weight of a non-volatility component of the oil agent, the amino silicon oil accounts for1-10% of the weight of the non-volatility component of the oil agent, the polyether silicone oil accounts for 1-10% of the weight of the non-volatility component of the oil agent, and the aliphatic polyoxyethylene ether accounts for 15-35% of the weight of the non-volatility component of the oil agent. According to the oil agent, absolute amount of dimethyl silicone oil and a small quantity of amino silicon oil and polyether silicone oil serve as main components of the oil agent, the aliphatic polyoxyethylene ether serves as an emulsifying agent, stable oil agent emulsion with small average particle size can be prepared, affinity and uniform film-forming property of the oil agent and the precursor can be achieved, the problem of roll sticking of modified silicon oil in the use process issolved, running stability is improved, on-site labor intensity is reduced, and high-quality and high-grade PAN (polyacrylonitrile) precursors and carbon fiber products are acquired.

The invention discloses a butter inhibitor and a production method thereof. The butter inhibitor is composed of the following components by weight percentage: 30-40% of diethylhydroxylamine, 3-8% of sodium lignosulfonate, dihydrogen phosphate Ammonium 4‑5%, cellulose airgel microspheres 0.1‑1%, water balance. The butter inhibitor of the present invention can not only well inhibit the production of butter, but also has a good effect of dispersing and cleaning the already produced butter, ensures the long-term operation stability of the alkali washing tower, and provides convenience for the subsequent treatment of wastewater. High application value.

The invention discloses a grease inhibitor and a production method thereof. The grease inhibitor consists of the following components in percentages by weight: 30-40% of diethylhydroxylamine, 3-8% ofsodium lignin sulfonate, 4-5% of ammonium dihydrogen phosphate, 0.1-1% of cellulose aerogel microspheres and the balance of water. The grease inhibitor not only can inhibit generation of grease quitewell, but also has a good dispersing, clearing and removing effect on grease which has been generated, long-time running stability of an alkaline tower is ensured, follow-up treatment of wastewater isfurther facilitated, and the application value is high.

The invention discloses radioactive nuclear waste solidified iron phosphate glass with low alloy corrosivity and a preparation method of the radioactive nuclear waste solidified iron phosphate glass. By increasing the content of oxides with high light alkalinity in an iron phosphate glass system, the light alkalinity of the glass is improved, the oxidability of the glass is improved, and when the iron phosphate glass is in contact with an alloy in engineering operation, an oxidation film can be rapidly formed on the surface of the alloy, so that corrosion of a glass melt to the alloy is hindered; the long-term operation stability of nuclear waste glass curing treatment is improved, and the production efficiency is improved. The iron phosphate glass provided by the invention is prepared from the following components: 35 to 75 mol percent of P2O5, 10 to 40 mol percent of Fe2O3, 0 to 10 mol percent of SiO2, 0.1 to 20 mol percent of B2O3, 0.1 to 20 mol percent of Al2O3, 0.1 to 20 mol percent of Li2O, 0.1 to 20 mol percent of Na2O, 0.1 to 20 mol percent of K2O, 0.1 to 20 mol percent of Cs2O, 0.1 to 20 mol percent of MgO, 0.1 to 20 mol percent of CaO, 0.1 to 20 mol percent of SrO, 0.1 to 20 mol percent of BaO and 0.1 to 10 mol percent of La2O3. The iron phosphate glass prepared by the invention is low in alloy corrosivity, simple in preparation process, low in cost and easy to engineer, and has an extremely high application prospect in the field of radioactive nuclear waste glass curing engineering.

The invention provides a negative-pressure distillation water purifier and a solar negative-pressure water purifier system, and relates to the technical field of solar heat collection, sea water desalination and water treatment, the negative-pressure distillation water purifier comprises multiple stages of distillators which are sequentially arranged in a sleeving manner from inside to outside, each stage of distiller comprises a condensation wall and an evaporation tank, and the condensation walls are arranged outside the evaporation tanks in a sleeving manner; one side of each condensation wall and one side of each evaporation tank are welded to one common end plate, the other side of each condensation wall and the other side of each evaporation tank are provided with independent end plates, and the structure has the advantages of compact structure, good pressure bearing performance, low cost, high long-term operation stability and the like. The water purifier system comprises a solar water heater, a negative pressure distillation water purifier and a sealed fresh water tank, during operation, the solar water heater provides hot water for a heat exchange pipe in the negative pressure distillation water purifier, and fresh water is formed on the condensation wall of each stage of distiller and slides to the bottom along the wall surface through multi-stage backheating; and the fresh water flows through the fresh water communicating pipe at the low position of the bottom of the condensation wall, is gathered and finally enters the sealed fresh water tank.

The invention discloses a security entrance guard identification system with an anti-jamming self-detection function. By arranging a first anti-jamming motor, a second anti-jamming motor, a weight sensor and the like, the system can achieve the automatic self-detection and automatic blockage clearing on two most common jamming positions of a positioning card, so the automation degree of the systemis improved, the frequency of manual startup maintenance is reduced, and the long-term operation stability of the system is improved.

The invention discloses a bioretention pond filter layer filler and a processing method. The bioretention pond filter layer filler is prepared from the following raw materials in percentages by weight: 1-2% of a natural organic matter, 45-60% of continuously graded coarse sand, 10-25% of continuously graded medium sand and 25-35% of continuously graded fine sand. By adopting the continuously graded sand, the bioretention pond filter layer filler is more stable than an existing proportion structure layer, the component of original soil is omitted under the premise of ensuring plant growth, and the problem of blockage caused by soil hardening in the operating process of the bioretention pond is solved. Meanwhile, the invention further discloses a factory processing method with the mixture ratio. The raw materials conveyed from a wharf are dried until the moisture content is 1-3% and then stirred evenly, and the initial permeability coefficient also meets the technical requirements. The used raw materials with the ratios are continuously graded, so that the sieving process is omitted, complete drying is not needed in factory production, the procedure is simplified and the cost is reduced.

The invention provides a continuous alternating MBBR sewage treatment method and equipment. The treatment method is as follows: firstly, the granular suspended impurities in the sewage are removed through pretreatment, and the water quality and water quantity of the sewage are balanced, and then the anaerobic / anoxic / aerobic alternating operation mode is used to release anaerobic phosphorus from the sewage , Simultaneous denitrification and nitrification treatment, which improves the removal efficiency of pollutant matrix. The treatment equipment includes a homogeneous room, a pre-denitrification room, a transition room, an aerobic room, an aerobic tank, a high-efficiency sedimentation tank and an equipment control room that are connected in sequence through the water pipeline; the equipment control room is equipped with ultraviolet disinfection equipment, pipeline increasing Pressure pump, automatic filter tank, aeration fan and PLC control device. The treatment equipment has a high degree of integration, strong functionality, simple and convenient installation and operation of the equipment, small footprint, high space utilization rate, and enhanced long-term operation stability, and the treatment energy consumption and operation and maintenance cost of the whole set of sewage treatment equipment are low .

The invention provides an optical fiber sensing device based on ultrasonic frequency detection, and an implementation method thereof. The optical fiber sensing device comprises an ASE light source, an optical fiber coupler, a sensing unit, an ultrasonic generation device, a photoelectric converter and a signal processing module. According to the invention, sensing is carried out through the optical fiber, the Fabry-Perot cavity principle is utilized, light emitted by the ASE light source generates an interference spectrum in the Fabry-Perot cavity, the interference spectrum is detected, the ultrasonic frequency is measured, digital output is realized through the signal processing module, and the purpose of displaying on a computer is achieved. According to the invention, the size of the sensing unit is reduced, the sensing sensitivity is increased, and the purpose of monitoring the ultrasonic frequency is realized. Meanwhile, the ultrasonic frequency can be output on the host, and real-time monitoring of the ultrasonic frequency is achieved.

The invention relates to an outdoor terminal of a high-voltage direct current cable, comprising upper fittings, insulating sleeves, lower fittings, insulating fillers, cables, lower conductor lead-out rods, connecting conductors, upper conductor lead-out rods, stress cones, insulating sleeves, and upper fittings . The lower fittings form a sealed chamber 1, which is filled with an insulating filler. The inner bottom of the sealed chamber 1 is provided with a sealed chamber 2. The lower end surface of the connecting conductor is connected to the top of the sealed chamber 2 through the lower conductor lead-out rod, and the lower conductor lead-out rod extends to In the second sealed chamber, the upper end surface of the connecting conductor is connected to the upper conductor lead-out rod, and the upper conductor lead-out rod passes through the upper fitting and protrudes; the cable passes through the lower fitting and extends into the second sealed chamber, and is connected to the lower conductor lead-out rod, and the cable is close to the lower part Part of the conductor lead-out rod is sheathed with a stress cone. The stress cone is set in the second sealing chamber, which effectively isolates the contact between the stress cone and the insulating filler, avoids the aging of the stress cone material caused by the contact, and realizes long-term operation with high stability.

The invention relates to a system and a process for recycling second-acid tower kettle liquid waste heat. The system comprises a second-acid tower, a third-acid tower and a reboiler B, wherein the liquid discharge port of the tower kettle of the second-acid tower is connected to the shell pass liquid inlet of the third-acid tower reboiler B, and the liquid discharge port of the third-acid tower reboiler B is connected to the liquid inlet in the middle of the third-acid tower. According to the invention, by arranging the third-acid tower reboiler B, the second-acid tower kettle liquid waste heat is effectively recovered, and the water consumption and the power consumption are reduced, so that the energy consumption is reduced; and the heat required for heating the third-acid tower kettle utilizes the second-acid tower kettle liquid waste heat, so that the use amount of heating steam of the third-acid tower is reduced so as to reduce the energy consumption.