196results about How to "Improve mass transfer efficiency" patented technology

The invention relates to a combined truncated cone type gas-liquid redistributor. The combined truncated cone type gas-liquid redistributor comprises a conical wall and a connecting bottom plate. Theconnecting bottom plate is fixedly arranged at the bottom of the conical wall, and is provided with a plurality of strip-shaped folding plates; the strip-shaped folding plates are of inverted-V structures; a plurality of air holes are formed at equal intervals in both sides of each strip-shaped folding plate; a stop plate is fixedly arranged on the lateral side of the strip-shaped folding plate above each air hole, and an angle is formed between each stop plate and the lateral side of the corresponding strip-shaped folding plate; the angles between the stop plates and the lateral sides of thestrip-shaped folding plates are proportional to the distances from the stop plates to the center of the connecting bottom plate. The combined truncated cone type gas-liquid redistributor has the advantages that the strip-shaped folding plates and the stop plates are adopted to achieve a good distribution effect of washing liquid, and accordingly, the area and time of contact between gases and liquid can be increased and prolonged; the included angles between the stop plates and the lateral sides of the strip-shaped folding plates are proportional to the distances from the stop plates to the center of the connecting bottom plate, so that the differences among the flowing speeds of gases from each air hole are small, the gas distribution effect is good, poor gas-liquid distribution in a packing tower is reduced, and the gas-liquid mass transfer efficiency is improved.

The utility model relates to the technical field of waste gas treatment, in particular to a tail gas absorption device in a desulfurization waste liquid salt extraction process, which comprises a collecting tower, a spraying system and a filler layer, the filler layer is arranged below a spraying pipe and comprises a filler supporting grating and a Pall ring, and the Pall ring is arranged in the collecting tower. The packing supporting grid is horizontally and fixedly installed inside the collecting tower, the Pall ring is flatly laid above the packing supporting grid and comprises an outer ring and an inner ring, the outer ring is flexibly arranged, the inner ring is rigidly arranged and is inserted into the outer ring, the inner ring and the outer ring are arranged in an interference fit mode, and the outer ring is fixedly connected with the Pall ring. By improving the structure of the Pall ring, the rigidity of the Pall ring is improved, an original PP Pall ring is replaced, and the Pall ring is applied to a spraying device for tail gas absorption, so that the problem that the mass transfer efficiency is reduced due to deformation of the Pall ring is solved, liquid in a tail gas absorption device is fully mixed with acidic or alkaline gas in tail gas, and the absorption efficiency is enhanced.

The application provides a porous carbon nanofiber electrocatalyst loaded with cobalt / lanthanum hydroxide heterojunction and a preparation method. The preparation method comprises the following steps: adding 4,4-diamino diphenyl ether and pyromellitic dianhydride into a solvent, uniformly mixing, and preparing a polyamide acid precursor spinning solution; electrospinning the prepared polyamide acid precursor spinning solution to prepare polyamide acid nanofibers; immersing the prepared polyamide acid nanofibers in a mixed metal salt solution containing cobalt salt, lanthanum salt and zinc salt to prepare polyamide acid nanofiber precursors loaded with metal ions; and performing programmed temperature heat treatment on the prepared polyamide acid nanofiber precursors loaded with metal ions in a protective atmosphere to prepare the porous carbon nanofiber electrocatalyst loaded with cobalt / lanthanum hydroxide heterojunction. The prepared porous carbon nanofiber electrocatalyst loaded with cobalt / lanthanum hydroxide heterojunction has excellent electrochemical oxygen reduction reaction and oxygen evolution reaction bifunctional catalytic activity.

The invention relates to the technical field of oxygen reduction catalysts, in particular to a transition metal-based triatomic oxygen reduction catalyst and a preparation method and application thereof. The invention relates to a preparation method of a transition metal-based triatomic oxygen reduction catalyst. The preparation method comprises the following steps: dispersing carbon nanotubes in a solvent to obtain a dispersion liquid; adding transition metal acetate, urea and 4, 4 '-dihydroxy [1, 1'-biphenyl]-3, 3 ', 5, 5'-tetracarboxaldehyde into the dispersion liquid, performing ultrasonic treatment to obtain mixed liquid, and then performing heating reaction in an inert atmosphere; and after the reaction is finished, naturally cooling to room temperature, filtering, washing and drying to obtain the transition metal-based triatomic oxygen reduction catalyst. The catalyst designed by the invention not only has an efficient catalytic active site, but also remarkably improves the material transmission efficiency and enhances the utilization rate of a catalytic active center by optimizing the structure of a composite material, so that the synergistic enhancement of the electro-catalytic performance is realized.

The application belongs to the technical field of carbonyl sulfur hydrolysis catalysts, and discloses a high-efficiency sulfur-resistant catalyst for carbonyl sulfur hydrolysis, a preparation method and application thereof.The preparation method comprises the following steps: (1) preparing a porous ceramic carrier containing alumina, titanium dioxide and zirconium dioxide; (2) in-situ growing a metal organic framework material containing lanthanum, bismuth and cerium on the surface of the porous ceramic carrier by using a solvothermal method; (3) performing a calcination treatment on the porous ceramic carrier loaded with the metal organic framework material in an oxygen-containing atmosphere to obtain a catalyst precursor; and (4) performing a reducing gas plasma bombardment treatment on the catalyst precursor to obtain the high-efficiency sulfur-resistant catalyst.The high-efficiency sulfur-resistant catalyst has high-efficiency low-temperature activity, excellent sulfur resistance and long service life.

The application discloses a micro-bubble stripping device and application thereof in ammonia-nitrogen wastewater treatment. The device comprises a micro-bubble dispersion device, an absorption device and a gas-liquid separation device which are connected by pipelines in sequence. The micro-bubble dispersion device is filled with Janus hollow fiber membranes. The inner diameter of the Janus hollow fiber membranes is 0.1-2.0 mm, the wall thickness is 0.05-0.6 mm, the pore size is 0.05-2.0 um, the water contact angle of the hydrophilic layer is less than 65 DEG, and the water contact angle of the hydrophobic layer is greater than 110 DEG. Air is dispersed into micro-bubbles and contacted with ammonia-nitrogen wastewater. The micro-bubbles have the advantages of large specific surface area, high mass transfer efficiency and long gas-liquid contact time, so that the mass transfer of ammonia-nitrogen in water to gas phase is strengthened, the gas-liquid ratio is reduced, the energy consumption in the stripping process is reduced, and the equipment investment and operation cost in the stripping process are reduced.

The invention belongs to the technical field of dibromohydantoin production, and particularly provides a dibromohydantoin synthesis method which comprises the following steps: S1, preparing a raw material aqueous solution, namely respectively mixing dimethyl hydantoin, sodium bromide and liquid caustic soda NaOH with deionized water to form a dimethyl hydantoin aqueous solution, a sodium bromide aqueous solution and a liquid caustic soda NaOH aqueous solution; s2, premixing the raw material aqueous solution, namely mixing the aqueous solution of dimethyl hydantoin, sodium bromide and caustic soda liquid NaOH prepared in S1 to obtain a premix; s3, electrochemical in-situ bromination reaction: introducing the premix into a micro-channel reactor provided with an electrolysis electrode, and applying current to the premix to obtain a dibromohydantoin initial solution; and S4, crystallizing, separating and drying the product, carrying out cooling crystallization through a three-stage stepped cooling method to obtain a dibromohydantoin crystal, carrying out centrifugal separation to obtain a dibromohydantoin wet product, and then drying to obtain a dibromohydantoin finished product. The method can improve the generation stability and the product quality of the dibromohydantoin.

The invention discloses a treatment system for synergistically removing odor substances and a new pollutant PFAS in water and a treatment method thereof. The treatment system comprises a pre-oxidation unit, an algae removal, adsorption and clarification unit, a membrane separation and concentration unit and a destruction unit which are connected in sequence. The pre-oxidation unit is provided with an oxidation pond with a transverse reciprocating dynamic aeration assembly, so that the ozone mass transfer efficiency is improved. The algae removal, adsorption and clarification unit enables a suspended carbon mud bed to periodically expand and contract through a pulse generator so as to strengthen adsorption. The membrane separation and concentration unit adopts a modified polyether sulfone conical-end filtering membrane and is matched with an online cleaning mechanism, so that PFAS is efficiently intercepted, and secondary pollution is avoided. The destroying unit is used for carrying out synergetic high-temperature incineration on the membrane separation concentrated water and the waste carbon mud, and PFAS is thoroughly decomposed at the temperature higher than or equal to 900 DEG C; by optimizing ozone aeration, pulse adsorption, fluorine-free membrane separation and collaborative incineration, efficient collaborative removal of odor substances and new pollutant PFAS and harmless treatment of waste are achieved, the system integration degree is high, the treatment effect is good, and the risk of secondary pollution is avoided.

The invention provides a gas diffusion electrode device for electrochemical lithium-mediated ammonia synthesis and an electrochemical ammonia synthesis method, and belongs to the technical field of electrochemical ammonia synthesis. The gas diffusion electrode device comprises a nitrogen runner, a sealing gasket, a working electrode, a catholyte chamber, a diaphragm, an anolyte chamber, an anode catalyst, a hydrogen runner and an electrolyte, the electrolyte comprises a lithium salt, an organic solvent, a proton shuttling agent and an interface additive. According to the invention, high nitrogen transmission is realized by adopting a circulating type gas diffusion electrode device, and a three-phase interface chemical environment of gas, electrolyte and the gas diffusion electrode is regulated and controlled by an interface additive, so that the ammonia production rate and the Faraday efficiency are remarkably improved, and continuous and efficient nitrogen reduction reaction is realized at normal temperature and normal pressure.

The application discloses a kind of without heating regeneration carbon dioxide normal temperature removal process and system, belong to natural gas decarburization field;A kind of without heating regeneration carbon dioxide normal temperature removal process, comprising the following steps:S1, raw material gas pretreatment;S2, CO2 absorption;S3, rich liquid flash evaporation;S4, lean liquid regeneration;S5, material circulation;The application is effectively solved by the absorption part of being set, the pain point that edge filler reaction is not sufficient, the low life of central filler;Can shake and scatter adhesion filler ball, clean filter hole impurity, avoid filter hole blockage, further improve gas-liquid mass transfer efficiency;Can buffer knock impact force, prevent that filler plate is damaged;Can effectively protect electric telescopic rod, and maintenance is convenient, need not to disassemble whole tower body, shorten maintenance cycle, guarantee production continuity;Can avoid liquid flooding, channeling phenomenon.

The utility model provides a kind of oblique membrane plate's desulfurization tower, including desulfurization tower body, circulating spray mechanism, scale removal spray mechanism and baffle;Flue gas enters desulfurization tower body inside by smoke inlet pipe, and enters into desulfurization passage, and contact with the desulfurization lye that circulating spray mechanism sprays realizes desulfurization, and the contact path and contact time of flue gas and desulfurization lye are increased in the desulfurization passage of baffle composition, force flue gas to generate turbulent flow, improve gas-liquid mass transfer efficiency, to improve desulfurization efficiency, and by the spray head of last setting direct alignment possibly formed in baffle below " dry area ", carry out supplementary spray, help to eliminate desulfurization blind area, improve overall desulfurization uniformity and efficiency, by switching three-way valve, spray head can also spray scale removal agent on baffle, can effectively flush scale face on baffle, avoid the influence of airflow circulation of brushing baffle scale.

The application discloses a kind of based on nano microcrystalline metal powder and organic liquid hydride multi-medium composite slurry hydrogen storage material and its preparation method, and multi-medium composite slurry hydrogen storage material includes nano microcrystalline metal powder for hydrolysis heat production, hydrogen release endothermic organic liquid hydride and catalyst;Nano microcrystalline metal powder content is 1~40wt.%, and organic liquid hydride content is 50~95wt.%, and the content of catalyst is 1~25wt.%.The application combines the advantages of metal powder and organic liquid hydride, by covering metal powder in organic liquid hydride, on the one hand, the passivation problem of metal powder surface is solved, effectively isolates metal powder and air contact, prevents the formation of oxide;On the other hand, the heat generated by the reaction of metal and water is absorbed by organic liquid hydride, thereby improving the mass transfer efficiency, and reducing the energy loss in heat transfer process.

The utility model discloses a cell resuscitation culture shaking table, which belongs to the technical field of cell resuscitation culture and comprises a box body, a cover plate is rotatably connected onto the box body, a clamping frame is arranged in the box body, a container is clamped in the clamping frame, a shaking device is fixedly connected into the box body, and a rotating device is fixedly connected onto the upper surface of the shaking device. According to the utility model, when the second motor drives the rotating plate to rotate, the rotating block is driven by the movable rod to do constant-speed circular motion in the shaking frame, and in the process, the motion trail of the rotating block is doubly constrained by the first connecting rod and the second connecting rod to form a composite motion trail; the inclined plate periodically deflects along with the linkage effect of the rotating block to drive the clamping frame to form a 15-degree constant inclination angle, and the unique mechanical linkage design enables the culture container to keep a specific inclination angle during rotating motion, so that a stable vortex field is formed in a culture solution, and the mass transfer efficiency of a gas-liquid interface is remarkably improved.

This invention provides an electrochemical membrane reactor and its application in acidic wastewater treatment, belonging to the field of wastewater treatment, and particularly relating to the treatment of acidic wastewater. The device mainly includes membrane electrodes (including anodes and cathodes, with the number of cathodes and anodes being the same), an electrolytic cell, an acidic wastewater neutralization tank, a product water tank, and a DC power supply. The membrane reactor applies an electric field to the cathode and anode membrane electrodes via the power supply, generating hydroxide ions on the cathode surface to neutralize the acidic wastewater in the neutralization tank. Excess hydroxide ions can combine with heavy metal ions to form hydroxide precipitates. Simultaneously, a water pump extracts the clarified liquid containing organic pollutants after the reaction, and the organic pollutants in the water are degraded through electrochemical oxidation at the anode. This reactor can achieve the neutralization of acidic wastewater and the removal of heavy metal ions without the addition of external chemical reagents, while simultaneously electrochemically oxidizing and degrading organic pollutants in the water.

The utility model relates to a distillation device for methyl anthranilate production belongs to distillation equipment technical field, including distillation column, heating box, heater, steam outlet pipe, condenser, a plurality of support filter plates are fixed in the distillation column, the top of support filter plate is equipped with the filler layer, the top of intermediate filler layer is equipped with liquid inlet pipe, the condenser includes condensing box, and the condensing box is connected with inlet steam pipe and outlet steam pipe, and the inlet steam pipe is connected with the steam outlet pipe between the flow guide pipe, and the outer end of flow guide pipe is spirally wound with cooling air pipe, a plurality of liquid discharge pipes are equipped at the bottom of condensing box, and the liquid discharge pipe close to inlet steam pipe is connected with the return pipe, and the other end of return pipe is connected to the upper part of the uppermost filler layer, the utility model makes methyl anthranilate and other impurities more fully separate, has improved distillation efficiency significantly, first utilizes the air cooling to carry out the preliminary cooling to steam, reduces the load of water cooling system, promotes the purity, and the tower top temperature will not cause the sudden drop when refluxing, influences the distillation effect.

The application provides a method for treating municipal domestic sewage by using micro-nano bubble reinforced aerobic granular sludge, inoculates aerobic granular sludge which can simultaneously accumulate nitrous nitrogen and remove pollutants into a sequencing batch reactor, introduces municipal domestic sewage, carries out micro-nano bubble aeration, and operates the reactor in an anaerobic / aerobic / anoxic mode; the micro-nano bubble aeration controls the dissolved oxygen concentration at 2-3 mg / L, so that the self-enrichment and stable operation of anaerobic ammonia oxidation bacteria in the aerobic granular sludge are realized. The method utilizes the high oxygen mass transfer efficiency and long residence time of the micro-nano bubble, strengthens the pollutant conversion process in the system, and ensures a suitable anaerobic microenvironment for the anaerobic ammonia oxidation bacteria in the aerobic granular sludge; under the condition of treating municipal domestic sewage, the average concentrations of COD and ammonia nitrogen in the effluent are as low as 34.65 mg / L and 1.92 mg / L respectively, and the total nitrogen removal rate reaches 82.53%.

The application provides a kind of baffle type falling film element, including several vertical arrangement and oblique arrangement reaction plate, the oblique direction of adjacent plate is different, and the plate surface is provided with groove.Material is sequentially flowed down along groove from top, and the path is folded and compressed, which significantly reduces the height of equipment under the same residence time.The reaction plate is provided with built-in heating cavity, and is provided with first opening and second opening for heat medium to enter and exit;The plates are alternately connected in series to form independent heat medium loop by passing through the openings of the plates in the same direction, and the temperature and flow rate can be controlled in groups.The groove can extend in S-shaped curve to prolong the process and enhance the disturbance;The groove is wide at the top and narrow at the bottom, which can cope with the increase of material viscosity;The end of the groove is provided with a guide groove and is opened with a V / U / W-shaped notch to concentrate the material and make it fall.The multiple elements can be expanded in transverse parallel connection.The element has compact structure and high mass transfer efficiency, and is suitable for dehydration, desolventization and removal of volatile components of high viscosity or heat-sensitive liquid and molten material.

The present application relates to the field of environmental chemical engineering, especially to a device for removing new pollutants in sewage and a use method thereof, the shell is sequentially assembled from bottom to top by a water storage area, a filler area and a hydraulic area, the side wall of the water storage area is respectively provided with a water inlet and a water outlet with a non-return valve, and an agitator is fixed to the bottom of the water storage area; the filler area includes a porous filter screen and a biochar filler limited in the interior of the porous filter screen, a glass tube frame extending inward is fixed in the filler area, and an ultraviolet lamp is inserted into the glass tube frame; the hydraulic area includes a hydraulic display screen switch and a hydraulic piston slidingly and sealingly arranged on the top of the shell, the hydraulic piston is controlled to move downward to compress and pressurize the gas in the space below; the device is also connected with an ozone generator for filling ozone gas into the interior of the shell, which improves the adsorption performance and service life of the filler, the gas mass transfer mode and reduces the cost.

This invention relates to the field of silicon carbide crystal preparation technology, and discloses a crucible for growing high-purity semi-insulating silicon carbide crystals, comprising an inner liner layer, a transition layer, and an outer support layer sequentially composited from the inside out. The inner liner layer of the crucible adopts a composite structure of high-purity tantalum carbide matrix and rare earth oxides. Under high-temperature crystal growth environment, rare earth elements form a continuous segregation layer through grain boundary diffusion behavior, passivating active sites at grain boundaries and preventing oxygen impurities from penetrating inward. At the same time, the gradient material design of the transition layer achieves progressive matching of the coefficient of thermal expansion, fully absorbing the interfacial stress during thermal cycling and avoiding the risk of interlayer delamination, thereby ensuring the high stability and long service life of the semi-insulating properties of silicon carbide crystals. The microgroove array structure set on the outer surface of the inner liner layer is treated with pyrolytic carbon coating to construct a regular gaseous material transport path, reducing the tendency of polymorphic phase transitions at the crystal growth interface, thereby obtaining a highly uniform, inclusion-free silicon carbide single crystal structure.

The invention relates to the technical field of high polymer material processing, and discloses a supercritical CO2 assisted devolatilization and microcellular foaming integrated method for preparing optical-grade PMMA (polymethyl methacrylate), which comprises the following steps: conveying a PMMA prepolymer containing a residual methyl methacrylate monomer into a high-pressure reaction kettle to be in contact with supercritical CO2 and saturated; then, the saturated melt is subjected to rapid pressure reduction, CO2 dissolved in the melt is separated out to form a micropore structure, and residual monomers are synchronously brought out; and cooling and shaping to obtain the optical-grade PMMA material. By adopting the method disclosed by the invention, integrated preparation of efficient removal of PMMA residual monomers and micropore lightweight forming can be realized at a lower processing temperature, and the obtained material has lower residual monomer content, lower density, higher light transmittance and lower haze.

This invention relates to the field of aquaculture water treatment technology, and discloses a multi-stage purification and filtration system and filter dam device for fish ponds. The system includes a multi-stage flow-guiding filter dam, a piezoelectric-biocoupled reactor, and an adaptive resonant control system. The piezoelectric-biocoupled reactor is filled with piezoelectric composite biological filler. A micro-electric field is generated by ultrasonic excitation, which works synergistically with the biofilm to degrade pollutants. The adaptive resonant control system monitors the acoustic impedance value within the piezoelectric-biocoupled reactor in real time and adaptively adjusts the ultrasonic output parameters based on deviation using a differential algorithm, achieving dynamic control and in-situ renewal of the biofilm thickness. The system also includes anoxic autotrophic denitrification and reoxygenation reflux devices at the back end. Through the microscopic coupling of piezoelectric catalysis and biodegradation, and intelligent closed-loop feedback control, the system achieves simultaneous and efficient removal of recalcitrant organic matter and ammonia nitrogen, ensuring the high activity and long-term stable operation of the purification system.

The present application belongs to the field of environmental protection engineering construction technology, especially a hydrogen fluoride washing device, aiming at the operation of hydrogen fluoride washing tower, because the waste gas is not fully contacted with lye, and hard crystals are easily formed during the reaction, attached to the filler and tower wall, resulting in the blockage of the filler, the increase of system pressure drop, the increase of fan energy consumption, and the need for manual cleaning, which exists safety risk and affects the washing efficiency, the following scheme is proposed, including a washing tower body, an air inlet is formed on the outside of the washing tower body, and an air inlet pipe is fixedly connected inside the air inlet, an air outlet is formed on the top of the washing tower body. The hydrogen fluoride washing device disclosed by the present application has the beneficial effects of automatically removing the crystals in the tower by rotating spraying and brushing and scraping components, and periodically extruding the filler by using a pressure plate, which can shake off the crystals, enhance the turbulence to improve the purification efficiency, and realize automatic continuous operation, avoiding the high-risk manual cleaning.

This invention proposes an electrochemical method for rapidly removing scale-forming ions from water, belonging to the field of electrochemical technology. The method includes the following steps: A pulsed power supply is used; at least one anode plate is located inside the reactor; at least one cathode plate is located inside the reactor; and a dosing device is used; the pulsed power supply provides a pulsed voltage to the anode plate; after an appropriate time for the electrocoagulation reaction, the power supply is turned off, and an appropriate amount of sodium carbonate is added to the reactor. This invention utilizes an intermittent pulsed discharge mode, stopping the power supply after a suitable amount of metal flocs is generated, and cleverly utilizes the heterogeneous nucleation characteristics of calcium and magnesium ions on the floc surface, significantly reducing energy consumption and total reaction time, demonstrating significant advantages in the field of high-hardness water softening.

This invention relates to the field of industrial waste gas treatment and resource recovery technology, specifically to an absorption device and method for hydrocarbon waste gas, comprising: a filter tower body, the surface of which is connected to a waste gas inlet pipe, a waste gas outlet pipe, a lean liquid inlet, and a rich liquid outlet; the interior of the filter tower body is provided with a liquid distributor, a cyclone tube, and a vortex-type rotating ring; the cyclone tube is connected to the waste gas inlet pipe, and a spiral plate is provided inside the cyclone tube; the vortex-type rotating ring is located at the top of the cyclone tube; by setting up the cyclone tube and the vortex-type rotating ring, the hydrocarbon waste gas flows upward through the cyclone tube, and generates swirling flow through the spiral plate, forming a high-speed rotating upward airflow. The rising waste gas drives the lower and upper ring plates to rotate through the guide vanes, and then is ejected through the side of the vortex-type rotating ring. When the airflow is ejected through the side of the vortex-type rotating ring, the undulation of the guide vanes creates a violent turbulence, effectively improving its mixing and mass transfer efficiency with the falling lean liquid absorbent.

This invention relates to the field of catalysis, and discloses a method for preparing a naphthalene alkylation catalyst based on a hierarchical porous molecular sieve and its application. The preparation method includes: 1) treating a low silica-to-alumina ratio zeolite molecular sieve with a microporous structure by steam treatment or acid washing to obtain a dealuminized molecular sieve; 2) treating the dealuminized molecular sieve with a mixed aqueous solution of tetraethylammonium hydroxide and alkali to obtain a surface-rich silica-based hierarchical porous molecular sieve; 3) modifying the surface-rich silica-based hierarchical porous molecular sieve with ammonium ion exchange and calcining to obtain an alkylation catalyst, wherein the inner layer has a hierarchical porous structure with micropores and mesopores, and the outer layer is mainly mesoporous inert silica. The naphthalene alkylation catalyst prepared by this invention has a hierarchical porous structure with micropores and mesopores in the inner layer and an outer layer mainly mesoporous inert silica. This catalyst has the advantages of high selectivity, good mass transfer efficiency, and low deactivation.

The invention provides a copolymerization modified shortened polyacrylonitrile-based carbon fiber pre-oxidation device, and relates to the technical field of heating oxidation equipment.The copolymerization modified shortened polyacrylonitrile-based carbon fiber pre-oxidation device comprises a heating pool, a treating fluid is contained in the heating pool, a material mixing pot is arranged in the heating pool, a shaking unit is arranged in the heating pool, and fiber filaments can be pressed into the material mixing pot through the shaking unit; a vibration unit is arranged in the mixing pot and can vibrate the treating fluid to enable the treating fluid to wash the fibers to be uniformly oxidized. Through cooperation of the shaking unit and the shaking unit, a double homogenization system for dynamically shaking fiber tows and actively shaking the fiber tows by the treating fluid is constructed, so that the treating fluid forms directional flow and continuously washes the fiber tows, and the inner and outer layers of the tows and single fibers can be in full contact with the treating fluid; the problems of large pre-oxidation degree difference of inner and outer layers of tows, serious skin-core structure and concentrated local heat release easily occurring in a traditional dipping device are solved.

This invention discloses a porous carbon-supported copper catalyst, its preparation method, and its application, belonging to the field of catalyst preparation technology. The invention uses three-dimensional interconnected ordered porous carbon (NCP) with a large-pore structure as a support, tetraphenylporphyrin copper(II) and tetraphenylporphyrin as nitrogen and copper sources, and KOH or NaOH as activators. An NCP precursor adsorbed with tetraphenylporphyrin copper(II), tetraphenylporphyrin, and an alkaline component is obtained through a two-step adsorption process. This precursor is then pyrolyzed at 600-900℃ under nitrogen protection, cooled to room temperature, and washed with water to obtain the porous carbon-supported copper catalyst (NCP@NC-Cu). This catalyst retains a three-dimensional interconnected porous structure, with the active component (copper species) mainly distributed within the pores of the NCP support, and possesses a large specific surface area and abundant nitrogen. The catalyst was applied to the N-formylation reaction of amines with CO2 and H2 to prepare formamide compounds, exhibiting excellent catalytic activity, recyclability, and good substrate versatility, showing promising application prospects.

This invention relates to the field of freeze-drying technology, specifically to an intelligent vacuum freeze dryer and its usage method. The dryer includes a main unit and a pre-freezing vacuum chamber within it, a shelf placed inside the pre-freezing vacuum chamber, the shelf having an internal cavity and a main gas inlet at its bottom for gas to enter the internal cavity; a carrying tray with multiple evenly arranged internal components for storing materials, the tray having multiple planar grids and heating elements for releasing heat, multiple push rods for moving materials within the planar grids, and an adjustment component for adjusting the position of the push rods according to different usage environments; and side rotating columns with multiple evenly rotatable components connected to the sidewalls of the carrying tray, each side rotating column having multiple exhaust ports, and the carrying tray having an efficiency-enhancing component for driving the side rotating columns.

The application discloses a kind of for the synthesis of bio-based polyether polyol impact jet stirring reactor, it is related to reactor technical field, including reactor body, adjusting mechanism, charge air mechanism and stirring mechanism, the left end of the top of the reactor body is fixedly connected with the outer wall of adjusting mechanism, the left end of the reactor body is fixedly connected with charge air mechanism, the top center of the reactor body is fixedly connected with stirring mechanism, adjusting mechanism is by adjusting four groups of nozzle and shape change, change jet position and intersection, optimize flow field adaptation multiple raw materials;Guide mechanism adjusts the angle of guide vane and cooperates nozzle, double control flow field prevents uneven mixing;Charge air mechanism controls wave-shaped air bag by vacuum pump and piston rod, optimizes flow field to avoid scale formation;Stirring mechanism relies on part rotation and jet coordination, adaptation scale and promote gas-liquid mass transfer efficiency, finally improve synthesis efficiency, product uniformity and product quality.

The application belongs to the technical field of rubber additive synthesis, and particularly relates to a method for continuously preparing 4,4'-dithiodimorpholine. The method uses sulfur monochloride, morpholine, 32wt% liquid alkali (sodium hydroxide solution) and 120# solvent oil as raw materials, and generates 4,4'-dithiodimorpholine in a dynamic tubular reactor. After the reaction is completed, the material flowing out of the dynamic tubular reactor is collected, and the product is obtained through static layering, washing, filtering and drying. The method uses the dynamic tubular reactor for reaction, and the mass transfer and heat transfer efficiency are extremely high. The material is instantaneously and uniformly mixed, so that the morpholine and the sulfur monochloride are rapidly contacted and reacted, the reaction heat can be instantaneously removed, the optimal reaction temperature can be accurately maintained, the continuous production can be realized, the production capacity is greatly improved, the reaction time of the traditional kettle reactor is shortened from 2-7h to 10min, the raw material conversion rate is as high as 99% or more, and the goals of cost reduction and efficiency improvement, green safety are finally achieved.