85results about How to "Avoid overreaction" patented technology

The invention provides a metal matrix composite material, which uses metal as a matrix and uses graphene modified on the surface of carbide as a reinforcement. Due to the surface modification of the carbide, the interface bonding strength between the metal matrix and the graphene can be adjusted. For example, when the chemical affinity between graphene and the metal matrix is ​​too strong and an excessive reaction occurs, resulting in an excessively strong interface bond, the carbide can be used as a diffusion barrier to avoid the overreaction and weaken the interface bond; When the interfacial affinity is weak, the carbide can be used as a transition layer to promote interfacial wetting and improve interfacial bonding force.

The invention relates to an internal part of a high efficient mass transfer catalytic distillation tower. Wherein, the internal part 1 is composed of a porous container and a filler 5 with catalytic performance therein, the side wall and the lower bottom surface of the container are fixed, at least one longitudinal sliding bar 7 is arranged at the middle part of the lower bottom surface, the upper bottom surface can move up and down along the longitudinal sliding bar and be fixed at an arbitrary height of the sliding bar by a bolt 8, the side wall 2 of the container is not transparent, the upper bottom surface 4 and the lower bottom surface 3 of the container are wire screen plates or porous plates, the internal part is fixed on a grid-shaped support 10 by a nut 9, and the grid-shaped support is fixed on the wall 13 of the catalytic distillation tower. The height of the upper bottom surface of the internal part of the catalytic distillation tower of the invention is lower than the side wall, thereby accumulating liquid with a certain height above a catalyst; reactants are promoted to enter a catalyst bed with the help of the gravity of the liquid, thereby allowing the reactants to be fully contacted with the surface of the catalyst; products are simultaneously impelled to be moved out of the catalyst bed, thereby avoiding the excessive reaction and effectively controlling the retention time of the reactants on the surface of the catalyst.

A plate-type nuclear fuel having regularly arranged coarse particles of a gamma-phase U—Mo or U—Mo—X alloy and a fabrication method thereof and, more particularly, to a plate-type nuclear fuel having coarse spherical particles of a stable gamma-phase U—Mo or U—Mo—X alloy arranged regularly on an aluminum cladding in at least one layer and a fabrication method thereof. Operation limit power, high temperature irradiation stability and performance are advantageously improved by preventing excessive reaction between a nuclear fuel and aluminum matrix through minimization of the area of interaction layers between the fuel and aluminum matrix, minimizing pores and swelling by restraining reaction layer formation of an intermetallic compound, and maintaining high thermal conductivity to transfer internal temperature of the nuclear fuel smoothly.

The invention discloses a solid-liquid mixing and stirring device in the technical field of solid-liquid mixing and stirring. The device comprises a base. A stirring tank and a liquid storage tank arerespectively installed on the left and right sides of the top of the base. A stirring motor is installed on the bottom of the base through a fixing frame. A water pump is installed at the bottom of the inner cavity of the liquid storage tank; a liquid feeding pipe is installed at the water outlet end of the water pump; one end, of the liquid feeding pipe, far from the water pump extends to the bottom of the inner cavity of a hollow rotating shaft. An output end of a rotary motor is provided with a driving gear the right side of which is meshed with a driven gear. A fixed ring is installed onthe inner side of the driven gear, and the bottom of the fixed ring is connected to the left side of the top of the stirring tank through fixing bars. The driven gear is hinged with four groups of connecting bars. One side, of each of the four groups of connecting bars, far from the driven gear is hinged with a movable block. The four groups of movable blocks are fixed to the fixed ring through pin rolls. The stirring efficiency can be increased and the material mixing effect is improved.

The invention relates to the technical field of intelligent power grids, and discloses a control method for improving the power grid stability by applying an energy storage device. A double-layer control method is adopted, a stability control layer adopts short-time scale control, the control factor is system stability, wind power and photovoltaic output connected into the system and load and voltage fluctuation values of power consumers are tracked, energy storage active power and energy storage reactive power are obtained through load flow calculation and a particle swarm algorithm and fed back to an energy storage device grid-connected inverter interface to serve as reference values, and when load abrupt change occurs, the energy storage system can give a response prior to other power generation devices of the system according to the reference values. The optimization control layer adopts long-time scale control; the stability and economy of the system and the real-time state and the service life of the energy storage system are comprehensively considered, the charging and discharging power and the residual capacity of energy storage are obtained through the particle swarm algorithm, the result obtained by the stability control layer is optimized and uploaded to the energy storage detection control module, and finally the operation mode and the charging and discharging powerare determined.

The invention relates to a system and method for continuously preparing furfural from a lignocellulose raw material. The system comprises an acid liquor discharging unit, a raw material mixing unit, afeeding unit, a main body reaction unit, a discharging unit, a steam stripping tower, a separating unit and a purifying unit. The method comprises the following steps: acid liquor discharging, raw material mixing, feeding, hydrolysis reaction, discharging, steam stripping reaction, separating and purifying. The system is a real continuous production system, continuous collection of the products is realized on time, the labor intensity is reduced, and the production efficiency is improved. The whole process is reasonable in design, high in yield of furfural and low in unit energy consumption.

The invention relates to a lead-free glass powder for the aluminium paste of a solar cell and a preparation method for the same. The lead-free glass powder comprises the following components in percentage by weight: 20-29% of bismuth oxide, 5-15% of boron oxide, 21-39% of silicon oxide, 5-30% of zinc oxide, 1-10% of calcium oxide, 1-10% of antimony oxide and 0.5-5% of tin oxide, wherein the total of the percentages by weight of the raw material components is 100%; the median particle diameter of the glass powder is 2 mum, and the maximum particle diameter of the glass powder is 5 mum; and the softening temperature of the glass powder is 400-550 DEG C. Compared with the prior art, the lead-free glass powder for the aluminium paste of a solar cell disclosed by the invention is low in the content of the bismuth oxide component, high in the contents of the silicon oxide component and the boron oxide component, good in wettability with a silicon substrate, and capable of forming good bonding with the silicon substrate; and moreover, the glass powder is capable of avoiding damages on the substrate due to the over-reaction of the glass powder and the silicon substrate during sintering, beneficial to the epitaxial growth of the silicon substrate to form a P+ layer, and capable of increasing the electric performance of the cell slice.

The invention discloses a method for producing KA oil and adipic acid by utilizing air oxidized cyclohexane based on an improved reaction-separation synchronous reactor. The improved reaction-separation synchronous reactor comprises a bubble gravity reaction tower or stirring reaction tower and a constant-temperature settling tower, wherein an upper gas-phase region, a middle-lower reaction region and a top reaction gas outlet are arranged inside the reaction tower; multiple groups of gravity settling plates are obliquely arranged on the tower wall in the reaction region of the bubble gravity reaction tower, and are distributed alternately; a stirrer is arranged in the reaction region of the stirring reaction tower; and a gas inlet and a gas distributor are arranged in the bottom of the reaction region of the reaction tower. The main improvement of the invention lies in that the bubble gravity reaction tower or stirring reaction tower is connected with the constant-temperature settling tower by virtue of a flange, a microporous filter plate through which a liquid can flow is arranged in the constant-temperature settling tower, and a circulating pipe is arranged at the lower part of the microporous filter plate in the constant-temperature settling tower, and is connected with the upper part of the reaction region of the reaction tower. Cyclohexane is subjected to air oxidation by utilizing the improved device to produce KA oil and adipic acid, overreaction of a product in the reaction tower is reduced, high-purity KA oil and adipic acid can be obtained, the connecting pipeline and circulating pipeline between a reaction kettle and the constant-temperature settling tower are prevented from being plugged, and the KA oil and adipic acid can be respectively effectively separated in time during reactions.

The invention aims to provide a cataplasm far-infrared medical application for treating arthralgia, myalgia, wind cold and numbness, which is elaborately developed by adopting rare pure traditional Chinese medicinal materials, a scientific novel method and a novel process. The application takes a formula in portion by weight: 40 g of borneol, 20 g of frankincense, 20 g of myrrh, 10 g of safflower, 10 g of panax notoginseng, 20 g of pangolin, 60 g of garden balsam stem, 20 g of common clubmoss herb and 400 g of colophony. The main composition of the formula is the pangolin, namely pangolin scales which is salty in taste and slightly cold in property, mainly treats wind cold and limbs numbness, and has the efficacy of dehumidifying, dissolving turbidity, diminishing inflammation and removing pain. The medical application has chlorpheniramine maleate and methyl salicylate which are effective compositions of western medicine added in preparation process, and uses far-infrared powder and biological magnetic powder which are the latest scientific achievements. The application has the advantages of clear effective compositions, obvious efficacy, few side effects, stable preparation and strict quality standard, thereby meeting the requirements of modern Chinese medicine on safety, high efficiency, stability and controllability.

A mass flow controller has: a flow rate sensor section that measures the flow rate of a fluid and outputs a flow rate measurement signal indicating the measurement value; a flow rate control valve disposed upstream or downstream of the flow rate sensor section; a calculation section that calculates a feedback control value to the supplied to the flow rate control valve by performing at least a proportional calculation on the deviation of the flow rate measurement value indicated by the flow rate measurement signal from a flow rate setting value; and an opening control signal output section that generates an opening control signal based on the feedback control value and outputs the opening control signal to the flow rate control valve. The function used for calculating the gain value in the proportional calculation differs between a changing period and a stable period.

The invention discloses a novel technology for producing 5-hydroxymethylfurfural and simultaneously recovering formic acid and acetic acid. The technology utilizes an impinging stream reactor especially suitable for the technology. Through multiple impinging processes, fluid mixing is realized and good microscopic mixing effects are obtained. The mixed liquid is horizontally pushed to flow outside an impinging zone so that enough staying time is supplied for materials, a stepwise reaction is realized and a desired conversion rate is realized through channel and liquid flow rate designs. The technology solves the problem that the existing impinging stream reactor cannot realize a high conversion rate through a single reactor, simplifies processes, reduces a production cost and an equipment investment and guarantees long-term equipment operation. The technology does not discharge a waste liquid in production and is a green environmental protection technology.

The invention discloses a centrifugal centripetal flow beam tube type water bed reactor which comprises a shell, and a radial distributor comprising an inner radial basket diameter and an outer radialbasket diameter is arranged in the shell. An annular gap is formed between an outer radial basket and a cylinder body, a reaction area is formed between an inner radial basket and the outer radial basket, and the inner radial basket comprises a gas inlet part and a gas outlet part which are connected up and down. A first airflow channel is arranged on the air inlet part. A second airflow channelis arranged on the gas outlet part. A third airflow channel is arranged on the outer radial basket. The reaction area is divided into an upper reaction area and a lower reaction area. A first reactiongas enters the upper reaction area through the gas inlet part for reaction to form a partial reaction gas, and then the partial reaction gas enters the annular gap. A second reaction gas enters the annular gap through a side reaction gas inlet pipe and is mixed with the partial reaction gas to form mixed reaction gas, and the mixed reaction gas enters the lower reaction area for reaction. By utilizing the reactor, the retention time of reaction gas in the reactor can be effectively prolonged, so that the one-way reaction efficiency is improved.

The invention provides a low-emission glass fiber reinforced polypropylene composite material and a preparation method thereof. The preparation method comprises the following steps of: obtaining raw material polypropylene resin, glass fiber, compatibilizer and auxiliary agents, blending the polypropylene resin, the compatilizer and the auxiliary agents to obtain a mixture; feeding the mixture andthe glass fibers to an extruder and melt-extruding under microwave conditions. In that preparation of the composite material, the microwave is introduced into the preparation of the composite material, the heat can be ensured to penetrate into the interior of the polypropylene macromolecule and the additive molecule, the excessive overheating caused by partial overheating is avoided, thereby effectively reducing the amount of the polypropylene or the additive decomposed into the volatile organic small molecular compound when the glass fiber reinforced polypropylene composite material is produced, and obviously reducing the emission of the organic small molecules in the glass fiber reinforced polypropylene composite material; the process is simple, green and environment-friendly, and the auxiliary agents for reducing the organic small molecule are not required to be added in addition; and the performance of the glass fiber reinforced polypropylene composite material is not affected.

The invention provides a low smell glass fiber-reinforced polycarbonate/acrylonitrile-butadiene styrene (PC/ABS) alloy and a preparation method thereof. The preparation method includes the following steps: weighing preparation raw materials in parts by weight, wherein the preparation raw material is prepared from 5-80 parts of polycarbonate resin, 5-80 parts of acrylonitrile-butadiene-styrene resin, 1-40 parts of glass fiber, 1-20 parts of compatibilizer, 0-20 parts of filler, and 0.2-10 parts of assistant; blending the polycarbonate resin, the acrylonitrile-butadiene-styrene resin, the compatibilizer, the filler and the assistant to obtain a mixture; feeding the mixture and the glass fiber to an extruder, and performing melting, extrusion and granulation under microwave heating conditions. The preparation method can surely avoid unnecessary over-reaction caused by local overheating, reduce decomposition of the preparation raw materials into small molecular compounds having off-odor and reduce the odor level of the alloy. The preparation method is simple in process and environmentally friendly, and does not need to additionally add assistant to reduce organic small molecules and does not affect the performance of the alloy.

The invention provides a pasture feeding device and system with a monitoring function, and relates to the technical field of the livestock environmental engineering. The pasture feeding device with the monitoring function comprises a feeding tank, a gas collecting tube, a gas detector and an exhaust fan. One side of the feeding tank is provided with an opening, and the feeding tank is used for loading a fodder. One end of the gas collecting tube is communicated with the gas detector, and the other end is fixedly connected with the edge of the opening. The exhaust fan is installed at one end, adjacent to the gas detector, of the gas collecting tube. The gas detector is used for detecting the concentration of the gas exhaled by a dairy cow. The pasture feeding device with the monitoring function is capable of simultaneously realizing the functions of providing the feeding platform and monitoring the gas. The functions are diversified, and the more information of the dairy cow can be collected. A worker can conveniently master the dynamic information of the dairy cow in real time in a feeding behavior process, so a better feeding scheme is developed.

The invention belongs to the technical field of chemical engineering reaction equipment, and provides a reaction kettle. The reaction kettle comprises a reaction cavity, a material inlet, a speed control assembly, a temperature control assembly, a material discharging assembly and a stirring assembly, wherein the material inlet is connected to the upper end of the reaction cavity; the speed control assembly is communicated with the material inlet; the temperature control assembly is connected to the reaction cavity and is used for controlling the temperature in the reaction cavity; the material discharging assembly is connected with the bottom part of the reaction cavity, and is used for accelerating material discharging; the stirring assembly is connected to the reaction cavity, and is used for accelerating the reaction; the temperature control assembly comprises a heat conduction passage and a circulating pump, the heat conduction passage is attached to the inner wall of the reaction cavity, and the circulating pump is connected to the heat conduction passage; the material discharging assembly comprises a material discharging pump and a material storage box, and the material storage box is communicated with the material discharging pump. By adopting the design, the reaction kettle can solve the problems of large discharging error, failure to intelligently control the reaction temperature, and excessive reaction due to longer discharging time in the existing reaction equipment.

The invention discloses a direct-current type short contact rotational flow reactor, and belongs to contact catalysis reaction equipment when a gas solid phase is in shortage. The direct-current type short contact rotational flow reactor is characterized in that a guiding blade (7) is arranged in a barrel (8), the central position of the guiding blade (7) is provided with a fairing cone (6), and the fairing cone (6) and the barrel (8) are coaxial; the guiding blade (7) and the fairing cone (6) can divide the barrel (8) into an upper mixing region (5) and a lower reaction/separation region (9); the upper end of the mixing region (5) is provided with an inlet cone section (4), multiple catalyst feeding pipes (2) are uniformly arranged on the periphery of the top of the inlet cone section (4), a cone surface of the inlet cone section (4) is provided with multiple fresh raw material introducing devices (3), and an anti-coking steam distributor (14) is arranged below the top of the inlet cone section (4). The direct-current type short contact rotational flow reactor provided by the invention has the advantages that the gas-solid standing time is short, the axial backmixing is little, and a catalyst and a gas product are separated in real time.

The invention discloses an improved reaction and separation synchronous reactor. The improved reaction and separation synchronous reactor comprises a bubble gravity reaction tower or stirring reaction tower and a constant-temperature settling tower, and is mainly characterized in that the bubble gravity reaction tower or stirring reaction tower is connected with the constant-temperature settling tower through a flange, a micropore filter plate allowing liquid to pass through is arranged in the constant-temperature settling tower, and a circulating pipeline is arranged at the position, on the lower portion of the micropore filter plate, of the constant-temperature settling tower and connected with the upper portion of a reaction zone of the reaction tower. According to the improved multiphase reactor, overreaction of products in a reaction kettle can be reduced so as to obtain a product with higher purity, blockage of a connecting pipeline between the reaction kettle and the constant-temperature settling tower and the circulating pipeline can be prevented, and a liquid product and a solid product can be effectively separated in time on the premise of completing reaction. The improved multiphase reactor is especially suitable for reactions where the specific gravity of products is larger than that of reactants and the products are insoluble for one another and comprise solids.

The invention discloses a method for adjusting a titanium-tungsten carrier pore passage in a waste SCR denitration catalyst and application, and the method comprises the following steps: placing the waste SCR denitration catalyst in a sodium hydroxide solution for slurrying heat treatment to obtain a primary precipitate; and cleaning the primary precipitate, slurrying to obtain alkali treatment slurry, and carrying out carbonation treatment on the alkali treatment slurry to obtain a secondary precipitate; and slurrying the secondary precipitate to obtain acid treatment slurry, adding a sulfuric acid solution into the acid treatment slurry, and adjusting the pH of the acid treatment slurry to a preset pH value to obtain a tertiary precipitate; and washing the tertiary precipitate with water, and drying to obtain the titanium-tungsten carrier with the adjusted pore structure. By adding alkali into the waste SCR denitration catalyst, performing heat treatment and soaking and then performing secondary acidification treatment, the pore channel structure of the recycled titanium-tungsten carrier can be effectively adjusted, the pore volume of the titanium-tungsten carrier can reach 0.40cm < 3 >/g or above, the pore volume requirement that the titanium-tungsten carrier is applied to preparation of a new SCR denitration catalyst is fully met, and generation of salt-containing wastewater can also be reduced.