25results about How to "Reduce backmixing" patented technology

The invention provides a heat extraction distribution structure for an isononyl alcohol hydroformylation reactor, and relates to the technical field of isononyl alcohol hydroformylation reactors, the heat extraction distribution structure comprises an inner tube box and an outer tube box, the inner tube box is arranged in the outer tube box, a heat extraction medium inlet cavity is formed in the inner tube box, and a heat extraction medium outlet cavity is formed between the inner tube box and the outer tube box; the heat exchange pipes are U-shaped pipes, a heat removal medium inlet and a heat removal medium outlet are formed in the two ends of each heat exchange pipe correspondingly, and the heat removal medium inlets and the heat removal medium outlets communicate with the heat removal medium inlet cavity and the heat removal medium outlet cavity correspondingly; the distribution plate is provided with a plurality of positioning through holes and a distribution structure, and each heat exchange tube penetrates through two positioning through holes; the problems that in the prior art, a gas-liquid up-flow type bubbling bed reactor is not internally provided with internal components, gas distribution and heat extraction cannot be achieved, and the conversion rate of reaction is low are solved.

The invention discloses a semi-coke tail gas chemical looping hydrogen production system which is characterized in that a first gas inlet chamber and a second gas inlet chamber are arranged in the hydrogen production system, and a reaction tube comprises a first reaction chamber and a second reaction chamber; the gas inlet of the first reaction chamber is communicated with the gas inlet of the second reaction chamber; the air outlet of the first reaction chamber is communicated with the air outlet of the second reaction chamber, so that the first reaction chamber and the second reaction chamber can supply air independently, the air speed in the first air inlet chamber is higher than that in the second reaction chamber, internal airflow circulation is effectively formed in the internal circulating fluidized bed, the reaction process is more sufficient, and the reaction efficiency is improved. The device effectively improves the hydrogen production efficiency, is simple in structure, realizes the independent air supply process through the independent design of the two cavities of the gas inlet pipe and the reaction pipe, realizes the effective circular reaction of tail gas in the reaction pipe through the control of the air speed, and improves the conversion efficiency.

The invention belongs to the technical field of chemical synthesis, and particularly relates to a system and a method for preparing anhydrous peroxy acid with more than C3. The system comprises a reactive distillation dividing wall tower, the reactive distillation dividing wall tower comprises a reaction separation zone, a water zone, a tower top zone and a tower bottom zone, the reaction separation zone and the water zone are arranged between the tower top zone and the tower bottom zone, the reaction separation zone is provided with a raw material inlet, and the water zone is provided with a plurality of solvent inlets; the reaction separation area and the water-carrying area are separated through a NaA molecular sieve membrane assembly, and the bottom of the water-carrying area is of a closed structure. By adopting the system disclosed by the invention, water generated by reaction and water brought by hydrogen peroxide can be removed from the system in time, backmixing among reaction raw materials is reduced, the reaction rate is further increased, and meanwhile, the water content of peroxide at the tower bottom can be reduced, so that the retention time of the peroxide is shortened, and the energy consumption is reduced.

The present invention provides a solvent deasphalting extraction tower and a solvent deasphalting method, wherein the extraction tower comprises an extraction section and a settling section, wherein the extraction section is located below the settling section, a feed port for crude oil is provided on the side wall of the tower body between the extraction section and the settling section, a feed port for solvent for the extraction section is provided below the extraction section, and at least two feed ports for high-temperature solvent for the settling section are uniformly provided along the axial direction on the side wall of the settling section. The present invention is improved on the basis of the original structure of the extraction tower, the extraction section is designed as a whole, and the temperature is kept basically consistent, the soluble components in the crude oil are dissolved to the maximum extent, the volume of the extraction section is reduced, and thus the back mixing during the extraction process is reduced; the present invention arranges a plurality of high-temperature solvent feed ports in the settling section, thereby replacing the arrangement of an external heat exchange pipeline, ensuring uniform temperature distribution in the settling section, uniformly heating the oil product coming up from the lower part of the extraction tower, and improving the yield of deasphalted oil; the extraction tower has a simple structure, significant improvement effect, and low cost.

The invention discloses a gas distribution unit, a bubbling bed reactor applying the same and a corresponding reaction method, and the gas distribution unit comprises a first gas distributor arranged below a catalyst bed layer and bubbling upwards; and the second gas distributor is arranged in the catalyst bed layer, and the second gas distributor bubbles downwards. According to the invention, through the gas distribution unit and the corresponding reactor, the gas phase feed distribution is more uniform, the conversion rate and selectivity of the reactor are effectively improved, and the catalyst deactivation phenomenon caused by too high local concentration of gas-liquid-solid three phases and violent reaction heat release is avoided.

The invention discloses a variable-diameter hydrogenation reaction system and application thereof. The variable-diameter hydrogenation reaction system comprises a hydrogenation reactor I and a hydrogenation reactor II; the hydrogenation reactor I is a variable-diameter gas-liquid countercurrent hydrogenation reactor and comprises a gas-liquid removal section, an upper reaction section, a countercurrent enhanced mass transfer section, a lower reaction section and a liquid degassing section which are sequentially communicated from top to bottom; the diameters of the upper reaction section and the lower reaction section are greater than the diameter of the countercurrent enhanced mass transfer section; a liquid feeding hole is formed between the gas-liquid removal section and the upper reaction section; a gas feeding hole is formed between the lower reaction section and the liquid degassing section; a gas discharge hole is formed above the gas-liquid removal section; a liquid discharge hole is formed below the liquid degassing section; the hydrogenation reactor II comprises at least one up-flow tubular reactor; and a feed port connected with a gas discharge port and a liquid discharge port of the hydrogenation reactor I is formed in the bottom of the up-flow tubular reactor.

The invention discloses a method for preparing raw film bulk ester by using a microchannel continuous flow reactor, comprising: preheating a mixture of salicylic acid ester and isophorol, and then introducing the mixture into a microchannel continuous flow reactor with an ester exchange catalyst for reaction, and obtaining the raw film bulk ester by post-processing after the reaction is completed; the microchannel continuous flow reactor comprises one or N reaction units connected in series, each reaction unit being formed by connecting a microchannel reactor and a falling film evaporator in series. The method has mild reaction conditions, produces few by-products, has high reaction selectivity, and can realize continuous production.

The invention relates to a micro-bubble hydrogenation reactor and application thereof. The reactor is provided with a membrane tube micro-bubble generating device in a catalyst bed layer, so that gas can be input into the catalyst bed layer in the form of micro-bubbles, thereby solving the problem of uneven distribution of micro-bubbles in the axial direction in the prior art, and is conducive to strengthening gas-liquid mixing and reducing liquid back-mixing. Meanwhile, the membrane tube micro-bubble generating device has a simple structure and is easy to process and load and unload. The reactor is used in a hydrogenation reaction, and the hydrogenation reaction rate can be controlled by introducing different types of gases into an injection pipe of the reactor, thereby strengthening the controllability of the hydrogenation reaction, avoiding overheating, coking or deactivation of the catalyst, improving the reaction efficiency and extending the service life of the catalyst, and has high industrial application value.

The present application relates to a kind of for aromatic hydrocarbon combined plant adsorption separation unit extract partition wall rectification system, including partition wall rectification tower, toluene separation flow path, p-xylene separation flow path and p-diethylbenzene separation flow path;Partition wall rectification tower includes the partition wall being arranged in tower interior, one end of partition wall is fixed in tower bottom, the other end of partition wall extends upwards and is kept a certain distance from tower top, and partition wall separates the space in tower interior into first separation chamber and second separation chamber being arranged left and right, and common rectification chamber being located above partition wall, first separation chamber, second separation chamber and common rectification chamber are in fluid communication;Toluene separation flow path is connected with the top of common rectification chamber;P-diethylbenzene separation flow path is connected with the bottom of first separation chamber;P-xylene separation flow path is connected with the bottom of second separation chamber.Compared with double-tower rectification process, investment is greatly reduced, tower top gas cooling load is less, system waste heat is fully recycled, energy consumption and cost are reduced, and economic benefit is generated.

The invention provides a nifuratel raw material extraction device, and relates to the technical field of raw material extraction. The nifuratel raw material extraction device comprises an extraction tower, a light phase outlet formed in the top of the extraction tower, a heavy phase inlet formed in the position, close to the upper portion, of the left side of the extraction tower, a light phase inlet formed in the position, close to the lower portion, of the left side of the extraction tower and a heavy phase outlet formed in the bottom of the extraction tower. A plurality of rotary trays which are distributed in a linear array manner are mounted on the rotary table driving and rotating mechanism, a plurality of fixing rings are fixedly connected to the inner side wall of the extraction tower, and the plurality of rotary trays are arranged between every two adjacent fixing rings. The problem that the mass transfer efficiency is greatly reduced due to backmixing and uneven liquid distribution when the intermediate raw material 5-nitrofurfural diethyl ester of nifuratel is extracted is solved, and meanwhile, the floating discs floating in different layer areas are utilized to adapt to the mass transfer conditions of different layer areas so as to improve the mass transfer efficiency.

The invention discloses a vertical-flow single-kettle type extraction machine, an adjusting method, a multi-stage counter-current extraction system connected in series with the vertical-flow single-kettle type extraction machine and a control adjusting method. The extraction machine is of a vertical single-kettle structure, a combination of a mixing cylinder, a guide cylinder and a container outer shell is formed in the extraction machine, and the extraction machine further comprises a variable-speed stirrer, a phase clarification functional filler, a two-phase liquid inlet pipe orifice, a two-phase liquid outlet pipe orifice and the like. The variable-speed stirrer drives the two-phase materials to be fully blended in the mixing chamber in a lower plug flow mode and form stable pressurized conveying, the blended materials are returned and then enter the annular clarifying chamber in a horizontal radiation flow mode to achieve efficient layering, and a pressurizing pressure head is reserved for discharging. A plurality of stages of single-kettle type extractors are connected in series according to a countercurrent mass transfer mode, and interstage connection and regulation assemblies are configured to form a countercurrent extraction system capable of supporting extraction under pressure. The system is operated according to a specific method, the whole line can be started and stopped at any time with lossless efficiency, the processing capacity can be greatly adjusted on line, the two-phase flow ratio can be adjusted on the whole line, the system can be conveniently started to distribute materials, and the system can be conveniently stopped and discharged according to quality.

The invention relates to the technical field of gas separation, in particular to a system and method for separating carbon dioxide in biogas through a gas hydrate method. A system for separating carbon dioxide in biogas through a gas hydrate method comprises a gas inlet system, the gas inlet system is connected with a reaction system, the reaction system is connected with a gas collecting system, the gas inlet system and the reaction system are both connected with a cooling system, and the reaction system and the cooling system are both connected with a monitoring system. The invention also provides a method for separating carbon dioxide by using the system for separating carbon dioxide in biogas by using the gas hydrate method. The foamy copper is mounted on the filler supporting net in the tower section, so that the mass and heat transfer effect is enhanced. By arranging the tower top, the tower sections, the tower bottom, the fastening screws, the inner hexagon nuts, the arc-shaped pressing plates and the like, the tower sections can be conveniently disassembled, meanwhile, foamy copper on the filler supporting net can be rapidly disassembled and replaced, and components in the tower sections can be conveniently maintained.

The invention belongs to the technical field of chemical synthesis, and particularly relates to a system and a method for preparing anhydrous peroxy acid with more than C3 by coupling a resin bed with a NaA membrane module. The system comprises a reactive distillation tower, the reactive distillation tower is sequentially provided with a tower top area, a first structured packing layer, a plurality of reaction separation assemblies and a tower bottom area from top to bottom, and each reaction separation assembly comprises an acidic resin bed and a NaA molecular sieve membrane assembly located below the acidic resin bed. The first structured packing layer is provided with a mixed material inlet of organic acid with more than C3 and hydrogen peroxide, and the acidic resin bed is provided with an organic solvent inlet. By adopting the system to prepare anhydrous peroxy acid, the energy consumption of the reaction rectifying tower can be effectively reduced, the reaction speed can be increased, decomposition explosion of peroxide can be prevented, meanwhile, loss of a catalyst in the later period can be effectively avoided, the catalyst is prevented from entering the anhydrous peroxy acid product, caprolactone is prepared by utilizing the prepared anhydrous peroxy acid product, and the yield of caprolactone is improved. And relatively high caprolactone selectivity and yield can be obtained.

The invention relates to the technical field of catalysts, and discloses a heteropolyacid catalyst as well as a preparation method and application thereof. The roundness P of the heteropolyacid catalyst is more than or equal to 0 and less than or equal to 0.8, meanwhile, the stacking density rho of the heteropolyacid catalyst is limited, and the relationship between the roundness P and the average radius Ravg is more than or equal to 0 and less than or equal to 0.95, namely (2 * rho * P) / Ravg; the catalyst can be efficiently stacked and arranged in the tube nest of the reactor, so that the catalyst is arranged more tightly, channeling and reverse mixing of feed gas among catalyst particles are effectively reduced, the utilization rate of methylacrolein can be increased in the reaction of producing methacrylic acid by oxidizing methylacrolein, and meanwhile, the occurrence of excessive reaction is reduced; therefore, the catalyst can keep high methylacrolein conversion rate and methacrylic acid selectivity at the same time. Meanwhile, the specific structure of the outer surface of the catalyst can enable the catalyst to obtain good mechanical strength, the cracking and crushing conditions of the catalyst are reduced, and the service life of the catalyst is prolonged.

This invention discloses a gas-liquid mass transfer unit, comprising: an upper tray channel extending downward from an opening in the upper tray; a swirl vane array at the top of the upper tray channel, with a first through-hole on the channel wall at a fixed position of the swirl vanes, for allowing only gas phase flow during the gas phase flow stage, forming a swirling flow through the swirl vane array, and for allowing only liquid phase flow during the liquid phase flow stage; a first constriction at the bottom of the upper tray channel, with a second through-hole along the upper edge of the first constriction for liquid phase overflow; a lower tray channel with a third through-hole at its upper part, for allowing only gas phase flow during the gas phase flow stage and only liquid phase flow during the liquid phase flow stage; a fourth through-hole in the lower middle part of the lower tray channel; a second constriction at the top of the lower tray channel; and a movable component that can slide entirely within the upper and lower tray channels; the movable component includes an upper circular surface and a lower circular surface fixedly connected; when the movable component moves to the top under the lifting action of the gas phase, it is in the gas phase flow stage; when the movable component moves downward under the gravity action of the liquid phase, it is in the liquid phase flow stage.

The utility model provides a stock solution feeding device for a spinning experiment, the stock solution feeding device is arranged in front of a spinning assembly, the stock solution feeding device for the spinning experiment comprises a cylinder body, an upper cover connected with the top of the cylinder body and a bottom cover connected with the bottom of the cylinder body, the upper cover is connected with the cylinder body through flanges, and a sealing gasket is arranged between the flanges; the upper cover is provided with an exhaust mechanism and a feeding mechanism which are communicated, and the feeding mechanism is obliquely arranged on the upper cover; a discharging mechanism is arranged at the bottom of the bottom cover. And the upper cover is connected with the cylinder body through a flange and is provided with a sealing gasket, so that good sealing performance is ensured. An exhaust mechanism is arranged on the upper cover and is used for exhausting gas in the barrel body in the experiment process. The feeding mechanism is obliquely arranged, so that upward backmixing of the stock solution in the cylinder is reduced. According to the stock solution feeding device for the spinning experiment, the problems that no experimental device for spandex spinning experiment exists in the market, and liquid leakage exists when a column cylinder filter without a filter element is adopted as the spinning feeding device for the experiment to conduct the experiment are solved.

The present application belongs to the technical field of petroleum chemical industry, and discloses a condensate oil separation process and device. The core of the condensate oil separation process is to improve the 'light and heavy gradual separation' process into a 'light, medium and heavy simultaneous separation' new process, and to open the side line production in the primary distillation column and the fractionating column of the condensate oil separation device. Part of the intermediate components are separated in advance, so that the back mixing of the intermediate component light naphtha in the primary distillation column and the back mixing of the intermediate component heavy naphtha in the fractionating column can be reduced, repeated rectification can be avoided, the separation difficulty of the system and the energy consumption can be effectively reduced; the C5 separation tower of the old original process is used for separating the mixed fraction of light naphtha and heavy naphtha after the pressure reduction transformation of the C5 separation tower; the heat pump technology is used in the debutanizer, the low-grade heat at the top of the tower is upgraded to serve as the reboiling heat source at the bottom of the debutanizer, part of the steam at the bottom of the tower is replaced, and the consumption of the cold utility at the top of the tower is reduced.

The invention relates to a method for preparing 2, 2-bis (3-m-nitrobenzamide-4-hydroxyphenyl) hexafluoropropane by a microchannel reactor, which comprises the following steps: fully mixing and preheating 6FAP and ethylene glycol monobutyl ether to obtain a 6FAP solution, taking the 6FAP solution and a preheated acylating agent as two strands of materials, and enabling the 6FAP solution and the acylating agent to respectively enter the microchannel reactor for mixed reaction to obtain 2, 2-bis (3-m-nitrobenzamide-4-hydroxyphenyl) hexafluoropropane. A product obtained by the reaction flows out from an outlet of the reactor; according to the present invention, the synthesis route process is simple and easy to operate. Compared with the existing route for synthesizing 2, 2-bis (3-m-nitrobenzamide-4-hydroxyphenyl) hexafluoropropane, the method has the advantages of higher safety, fewer three wastes, higher environmental friendliness, lower production cost and higher yield, and is more suitable for industrial mass production.

The invention belongs to the related technical field of electric heating experiment analysis instruments, and discloses a high-temperature and high-pressure micro fluidized bed thermal chemical reaction measuring device which comprises a high-pressure gas distribution device, a high-pressure pulse sampling device, a high-temperature and high-pressure reactor and an analysis and detection device, the other end is connected with the high-temperature high-pressure reactor through a high-pressure sample feeding pipe; the high-pressure gas distribution device is connected with the high-temperature high-pressure reactor through a high-pressure gas inlet pipe; the analysis and detection device comprises a filter, a back pressure valve and a mass spectrum which are sequentially connected along the airflow direction. According to the invention, the temperature and the pressure can be respectively controlled, the internal pressure can be regulated and controlled in real time through the back pressure valve and the air inlet pressure relief valve, the temperature is controlled by an independent temperature control system, and two key reaction working conditions of the temperature and the pressure are decoupled; the device can be suitable for thermochemical reaction analysis and measurement under various reaction working conditions such as low temperature and high pressure, high temperature and low pressure and high temperature and high pressure.

The utility model relates to the technical field of plastic pyrolysis dechlorination, in particular to a plastic pyrolysis forced dechlorination system which comprises a dechlorination tower, a pyrolysis unit, a dechlorination agent bin and a desalted water unit are all communicated with the dechlorination tower through pipelines, and an air outlet of the dechlorination tower is communicated with a first high-temperature membrane dust remover. A discharge port of the 1 # high-temperature membrane dust remover is respectively communicated with the dechlorination tower and the dechlorination agent waste bin, a gas outlet of the dechlorination agent waste bin is communicated with the 2 # high-temperature membrane dust remover, and a discharge port of the 2 # high-temperature membrane dust remover is communicated with the dechlorination agent waste bin. According to the utility model, the pyrolysis gas is forcibly extracted, so that the hydrogen chloride conversion rate in the pyrolysis process of the chlorine-containing waste plastics is improved, the converted hydrogen chloride is quickly absorbed through the dechlorination tower, and the unreacted dechlorination agent is recycled, so that the absorption efficiency of the hydrogen chloride is improved, and the generation of a large amount of chlorinated hydrocarbons in the pyrolysis process of the chlorine-containing waste plastics is effectively inhibited; the overhigh total chlorine content of the pyrolysis product is avoided, and meanwhile, the utilization rate of the dechlorinating agent is also improved.

The present invention provides an isononyl alcohol hydroformylation reactor, and relates to the technical field of isononyl alcohol hydroformylation reactors, the isononyl alcohol hydroformylation reactor comprises: a housing, the lower part of the housing is provided with a reactant inlet, and the side wall of the upper part of the housing is provided with a reactant outlet; the distribution device is arranged in the shell and located above the reactant inlet, the distribution device and the reactant inlet are arranged in a spaced mode, and the distribution device is used for evenly distributing the gas-liquid reaction medium; the heat extraction distribution structure is arranged in the shell and located above the distribution device, the heat extraction distribution structure and the distribution device are arranged in a spaced mode, and the heat extraction distribution structure comprises an inner tube box, an outer tube box, a plurality of heat exchange tubes and at least one distribution plate; the problems that in the prior art, a gas-liquid up-flow type bubbling bed reactor is not internally provided with internal components, gas distribution and heat extraction cannot be achieved, and the conversion rate of reaction is low are solved.

The invention relates to the technical field of production of epoxypropane by a hydrogen peroxide method, in particular to an epoxypropane reaction device which comprises a cylinder, a funnel and a downcomer, and the downcomer can be opened and closed; the reaction tube is wound around the cylinder, the tube diameter of the reaction tube is gradually increased from bottom to top, the upper end of the reaction tube is connected with the funnel, and the downcomer is connected with the reaction tube. The hydrogen peroxide reaction device has the following beneficial effects that through good temperature control, the utilization rate of hydrogen peroxide is increased, the service life of a catalyst is prolonged, potential safety hazards are reduced, and the production cost is reduced.

The invention provides a pipeline type hydrogenation process method for injecting a liquid catalyst, and relates to the technical fields of oil refining, petrochemical industry and coal chemical industry. According to the present invention, the high metal impurity raw oil is subjected to hydrogenation pretreatment by using the pipeline type reactor, and the liquid catalyst is used in the hydrogenation pretreatment process, such that the process method can easily maintain the raw material concentration, reduce the material backmixing, and improve the catalytic reaction efficiency, the product yield and the product quality; and the continuous operation time and the working efficiency of hydrogenation pretreatment are greatly prolonged.

The present disclosure relates to an apparatus, a process and a system for treating petroleum coke. The apparatus comprises an activation unit which is an annular furnace reactor. The system comprises a first reactor, the apparatus as a second reactor, a washing and separating unit, a cooling unit, a dissolving and separating unit, a washing and drying unit, optionally a regenerating unit, optionally a drying and calcining unit and optionally an evaporation-crystallization unit. Also provided is a process for producing carbon materials by using the system for treating petroleum coke. The apparatus, the process and the system in accordance with the present disclosure can achieve continuous production, and have advantages of high activation efficiency and stable properties of the resultant carbon material products.

The invention discloses a continuous desolventizing and washing process for energetic material solid particles, which comprises the following steps of: continuously feeding 2, 4-dinitroanisole methanol suspended matters with the concentration of 15-30% and a desolventizing agent in a desolventizing tower for countercurrent desolventizing, feeding the desolventizing agent below the 2, 4-dinitroanisole methanol suspended matters, and continuously desolventizing the desolventizing agent and the 2, 4-dinitroanisole methanol suspended matters in a desolventizing tower, the feeding mass ratio of 2, 4-dinitroanisole and methanol suspended matters is 0.5-2, the temperature during desolventizing is controlled to be 30-40 DEG C, stirring is carried out while desolventizing is carried out, the stirring speed is 5-20 revolutions per minute, crude 2, 4-dinitroanisole separated out by desolventizing is discharged from the bottom of the desolventizing tower, and a methanol desolventizing solution is continuously discharged from the upper part of the desolventizing tower. The invention further discloses a system for the continuous desolventizing and washing process of the energetic material solid particles. According to the method, the energetic material is continuously desolventized, washed and refined by taking measures such as the influence of polarity change of the mixed solvent on the solubility, the density and concentration gradient and the like, so that the purposes of safety and convenience are achieved.