569results about "Liquid-gas reaction processes" patented technology

The invention discloses a phosphorus oxyfluoride reaction and separation integrated preparation tower, and belongs to the field of industrial equipment for phosphorus oxyfluoride preparation, the preparation tower comprises a tower body, the tower body is provided with a feeding area, a reaction area and a separation area, the feeding area and the separation area are both filled with filler sections of filler, a first feeding port is formed in the bottom of the filler section in the feeding area, and a second feeding port is formed in the bottom of the reaction area. A tubular heat exchanger is arranged in each reaction zone, a threaded pipe is arranged on each tubular heat exchanger, filler is also filled between the threaded pipes, a second feeding hole is formed in the upper part of the reaction zone on the top layer, and polyphosphoric acid and anhydrous hydrogen fluoride are contacted in the reaction zones to form a concentration stepped reaction and a temperature stepped reaction; and the phosphorus oxyfluoride gas generated after the reaction is fractionated through the filler section on the separation area and enters the next process from the top of the tower body. According to the invention, the reaction and separation of phosphorus oxyfluoride production are integrated, the energy consumption of phosphorus oxyfluoride production is reduced, the production cost is reduced, and the reaction yield is improved.

The present application relates to a multiphase reactor. The multiphase reactor comprises: a reactor housing in which a reaction cavity is formed, wherein the reactor housing is provided with a second material inlet pipe and first material inlet pipes communicated with the reaction cavity, and the first material inlet pipes are used for conveying a first material to the reaction cavity; a gas distributor located in the reaction cavity, wherein the second material inlet pipe is communicated with the gas distributor, and a second material conveyed by the second material inlet pipe is conveyed to the reaction cavity by means of the gas distributor; and flow guide cylinders located in the reaction cavity, wherein a plurality of ventilation parts are arranged on each flow guide cylinder in the circumferential direction of the reactor housing, and the flow guide cylinders are used for axial drainage and radial cutting in the reaction cavity. The present application solves the technical problems that the reaction efficiency is affected and the material consumption is increased due to uneven distribution of a temperature field and a reaction field in multiphase reactors.

The invention discloses an in-kettle environment pressure stabilizing structure applied to an anhydrous hydrogen fluoride arsenic removal process, relates to the technical field of arsenic removal processes, and provides an improvement process about a rubber isolation pad and a lower supporting table on the basis of an oxidation reaction process in the anhydrous hydrogen fluoride arsenic removal process and on the basis of not changing the reaction process. The basic content is as follows: the reaction volume in the reaction cavity is changed by utilizing the elastic deformation of the rubber isolation pad and the supporting effect of the lower supporting table, so that the effect of preliminarily adjusting the environmental pressure in the reaction cavity is achieved; a combined or independent regulation and control process is carried out mainly aiming at a low-pressure state and an overpressure state, a pressure difference and pressure balance transfer principle is further utilized, and the environment pressure stabilizing effect in a container is achieved through the simplest and effective structure.

The invention discloses a homogeneous reaction and separation integrated hydrothermal upgrading device for industrial byproduct gypsum, and belongs to the technical field of slurry reaction devices under high temperature and high pressure. The device is characterized in that an elliptical head is arranged on one side of a reaction device barrel, a slurry inlet pipeline and a steam pipeline are arranged on the elliptical head, stirring blades and turbulent flow blades are arranged on the inner wall of the elliptical head, and an inner screw rib type stirring and conveying assembly is fixed in the reaction device barrel; the solid-liquid separation unit is arranged on the other side of the reaction device barrel, and a slurry baffle plate is arranged at the upper end of the joint of the reaction device barrel and the solid-liquid separation unit; one end of the steam heating device is connected with the elliptical head, and the other end is arranged along the axial direction of the reaction device barrel; and the water separation discharging device is arranged on the solid-liquid separation unit. The device provided by the invention not only can ensure that the slurry is rapidly heated and pressurized, but also can keep good homogeneity of the slurry, and can produce partially dehydrated gypsum slurry, so that the economical efficiency of the whole process and the system integration are improved.

A supergravity bidirectional rotating bed device based on an end effect zone comprises a shell, a first rotating disc and a second rotating disc, a plurality of first fillers are concentrically arranged on the first rotating disc, a plurality of second fillers are concentrically arranged on the second rotating disc, and the first fillers and the second fillers are annular and are concentrically distributed; the first filler and the second filler are mutually nested and distributed in a staggered manner at intervals; a liquid distributor is arranged in the center of the shell and used for spraying liquid to the first filler or the second filler on the innermost side, and a liquid phase outlet is formed in the bottom of the shell; a gas distributor is arranged on the periphery of the first filler or the second filler located on the outermost side in the shell, a gas inlet distributed towards the gas distributor is formed in the side portion of the shell, and a gas rising hole allowing gas to rise and be exhausted from a gas outlet formed in the top of the shell is formed in the center of the second rotary disc. The space utilization efficiency and the mass transfer efficiency of the filler area can be improved, and the overall mass transfer performance of the supergravity rotating bed is improved.

The invention belongs to the technical field of gas pollutant treatment, and particularly relates to filler for a gas-liquid reactor and application of the filler. The filler comprises a high-wettability corrosion-resistant polymer layer and a corrugated partition plate layer used for providing a channel for gas. The polymer layers and the corrugated partition plate layers in the filler are arranged at intervals, and the two polymer layers are arranged on the two sides of each corrugated partition plate layer in an attached mode respectively; the filler provided by the invention is formed by coupling the high-wettability polymer layer and the corrugated partition plate layer, the high wettability of the polymer layer can ensure that liquid is uniformly distributed on the polymer layer, and a layer of uniform water film is formed, so that the reaction efficiency of reaction gas and the liquid is improved, and a product after the reaction can be taken out by the liquid on the water film in time; the air resistance is reduced and the reaction efficiency is improved.

The present invention relates to a plant for oligomerizing ethylene to produce oligomerized alpha-olefins, with production of a fouling by-product in the form of a deposit, said plant comprising a reaction section comprising: —a reactor (c) for two-phase gas / liquid or single-phase all-liquid oligomerization proceeding from an optional solvent, an oligomerization catalyst and ethylene, and —cooling means associated with said reactor in the form of at least one cooling circuit external to the reactor and / or in the form of a jacket of the walls of the reactor. Packings are disposed in the reaction section in order to increase the contact surface area per unit volume that is accessible to the deposition of the byproduct.

The present invention provides a synthesis system and a synthesis method for lithium hexafluorophosphate. The synthesis system comprises a gas-liquid reaction kettle and a built-in microbubble generation unit provided in the gas-liquid reaction kettle; a material inlet and a gas inlet are formed in the side wall of the gas-liquid reaction kettle; the built-in microbubble generation unit comprises a first microbubble generator and a second microbubble generator, the first microbubble generator is provided below the liquid level in the gas-liquid reaction kettle and connected to the material inlet, and the second microbubble generator is provided at the bottom end of the gas-liquid reaction kettle and connected to the gas inlet; a plurality of layers of perforated plates are successively provided in the gas-liquid reaction kettle from top to bottom; through holes of said perforated plates are staggered, and said perforated plates are provided between the first microbubble generator and the second microbubble generator. The synthesis system of the present invention increases the area of mass transfer between lithium fluoride liquid and phosphorus pentafluoride gas, increases the reaction rate, and reduces energy consumption.

The utility model provides a system for preparing alkali by utilizing industrial waste gas and industrial waste brine. The system comprises a waste liquid pipeline, a waste gas pipeline, an ammonia gas pipeline, a heat exchanger, an oxidation reaction tower, a dust removal tower, a primary carbonization reaction tower and a deep carbonization reaction tower, the outlet of the waste liquid pipeline is connected with the oxidation reaction tower; an oxidation product generated by the waste liquid pipeline is conveyed into the primary carbonization reaction tower through a first conveying pipeline; the waste gas pipeline is connected with the dust removal tower through the heat exchanger, and a dust removal product obtained in the waste gas pipeline is conveyed into the primary carbonization reaction tower through a second conveying pipeline; the ammonia gas pipeline is connected with the primary carbonization reaction tower, a bottom outlet of the primary carbonization reaction tower is connected with a third conveying pipeline, and an outlet of the third conveying pipeline is connected with the deep carbonization reaction tower. According to the system, a negative carbon type, green and low-energy-consumption environment-friendly alkali production process is realized, and the industrial production requirements of green and sustainable development are met.

The utility model discloses a chlorination reaction kettle for chemical production, and belongs to the technical field of chemical production. Comprising a reaction kettle, a chlorine inlet pipe is arranged at the upper end of the reaction kettle, a discharge port is formed in the lower end of the reaction kettle, a base is arranged below the reaction kettle, and a heat dissipation assembly is arranged on the surface of the reaction kettle; according to the reaction kettle disclosed by the utility model, by arranging the heat dissipation assembly, rapid cooling of the reaction kettle is realized, the situations that heat in the reaction kettle is difficult to dissipate and the heat dissipation effect is poor are avoided, and the heat in the reaction kettle is rapidly transferred to the outside of the reaction kettle for heat dissipation, so that the heat dissipation speed of the reaction kettle is increased, and the practicability of the device is improved; by arranging the uniform distribution assembly, the chlorination reaction rate is improved, the situation that chlorine is directly introduced into the bottom of the kettle body, the contact area of the chlorine and reaction liquid is small, and the reaction is incomplete is avoided, the contact area of the chlorine and the reaction liquid is increased, and the chlorination reaction rate is improved.

The present invention relates to systems and processes for utilizing produced water and captured carbon dioxide to produce high-value products. The system includes a produced water processing system, a carbon capture system, an electrolyzer, and a conversion chamber. The electrolyzer includes a first chamber, a second chamber, and a semi-permeable membrane and first electrode in the first chamber and a second electrode in the second chamber. The first chamber receives treated saturated produced water. The second chamber is operated at a second operating pressure that is less than the first operating pressure and facilitates the passage of sodium ions across the membrane. A current is applied to the electrodes such that the first electrode functions as an anode and the second electrode functions as a cathode, producing hydrogen gas and sodium hydroxide in the second chamber and chlorine gas in the first chamber. The polarity of the electrodes and the flow of reagents into the first and second chambers and the flow of products out of the first and second chambers may be reversed.

The invention belongs to the technical field of devices for generating new substances by gas-liquid contact reaction, and discloses a falling film reactor for uniformly splitting hydroxyacetonitrile by using hydrocyanic acid, comprising a tower body, on which an air inlet, a liquid inlet, an upper tube plate, a lower tube plate, an air outlet and a liquid outlet are arranged in sequence from top to bottom, a falling film tube is fixed between the upper tube plate and the lower tube plate, and a falling film head fixed by a fixing member is arranged in the falling film tube; an even number of liquid inlets are arranged, and the liquid inlets are evenly distributed along the circumference of the tower body, and two opposite liquid inlets are connected by a guide tube; a plurality of guide protrusions located near the liquid inlet are arranged on the upper tube plate, and the number of the liquid inlets is consistent with the number of the guide protrusions. The invention solves the problem that after a mixed liquid is introduced into an existing falling film reactor, the mixed liquid will flow down from the falling film tube closer to the liquid inlet, resulting in a "dry tube" in other falling film tubes, affecting the contact reaction between hydrocyanic acid and the mixed liquid, and resulting in low production efficiency of hydroxyacetonitrile.

The invention discloses a micro-channel continuous reaction device applied to gas-liquid oxidation reaction. The micro-channel continuous reaction device comprises a feeding system, a micro-channel reaction module, a temperature control system, a product collection system and a control regulation system, the feeding system conveys a gas raw material and a liquid raw material into the micro-channel reaction module; the micro-channel reaction module comprises three or more micro-channel units which are connected in series, and each micro-channel unit comprises a plurality of gas-liquid mixers and a plurality of enhanced mixing reactors; the temperature control system is used for accurately controlling the reaction temperature; the product collecting system is used for separating and collecting reaction products; and the control adjusting system is used for monitoring and adjusting reaction conditions in real time. According to the invention, efficient mixing and uniform distribution of gas and liquid phases can be realized, the reaction efficiency is remarkably improved, side reactions are reduced, real-time monitoring and adjustment of reaction conditions are realized, and the operation stability and safety are improved.

The invention discloses a continuous preparation method of high-purity phosphorus oxyfluoride and a device thereof, and relates to the technical field of production for phosphorus oxyfluoride preparation.According to the continuous preparation method of the high-purity phosphorus oxyfluoride, by conducting preheating treatment on a preheating head tank of polyphosphoric acid, the polyphosphoric acid is preheated from liquid in a viscous state to obtain liquid easy to convey, and the liquid is controlled through an electromagnetic valve; polyphosphoric acid is conveyed into a constant-temperature kettle through a high-level-difference pipeline, the polyphosphoric acid is further heated and stirred to keep constant temperature through the constant-temperature kettle, the polyphosphoric acid and anhydrous hydrogen fluoride are subjected to gas-liquid two-phase exchange contact in a preparation tower to realize reaction and separation, and prepared phosphorus oxyfluoride gas is separated from the top of the preparation tower; after further drying is achieved through the spray drying tower, the phosphorus oxyfluoride product with the purity reaching 99.6%-99.8% is prepared through the condenser and the gas-liquid separator, the reaction yield is 95%-96%, the purity of phosphorus oxyfluoride is high, few side reactions exist in the production process, and the reaction yield is high.

The invention relates to the technical field of iron phosphate production, in particular to a production process and equipment for preparing iron phosphate based on an oxygen micro-interface reaction gas oxidation method and iron phosphate. The micro-nano bubble oxygen is used for replacing hydrogen peroxide to serve as an oxidizing agent, so that the production process of iron phosphate is optimized, and the reaction efficiency and the product quality are remarkably improved. The special property of the micro-nano bubble oxygen enables the micro-nano bubble oxygen to effectively improve the mass transfer efficiency and the reaction rate of the oxygen under the conditions of higher temperature and lower concentration, so that the efficient oxidation of ferrous in the raw material and the crystal form control of ferric phosphate are promoted. Oxygen is injected into the reaction liquid and forms superfine bubbles through the micro-nano bubble generator, so that the oxygen solubility and the reaction speed at a gas-liquid phase interface are enhanced. The oxygen generator is used for uniformly distributing bubbles in the whole reaction system by precisely controlling the gas flow and the bubble size, so that the uniformity and efficiency of the reaction are ensured.

The invention belongs to the technical field of chemical production, and particularly relates to extraction equipment and method for hydrogen peroxide production, the extraction equipment comprises an extraction container, inverted motors are symmetrically arranged on the two sides of the outer surface of the extraction container through sleeve shells, and the outer surfaces of the inverted motors are fixedly connected with side suspension frames; the extraction container comprises a containing cylinder; the torsion base is arranged at the bottom of the inner wall of the accommodating cylinder; the stirring component is arranged at the axis of the top of the torsion base. According to the device, the torsion base at the bottom of the containing cylinder can be improved to replace an electromagnetic stirrer to stir a solution from inside to outside, the rotating chassis and the packaging shell synchronously rotate, so that the packaging shell cannot abrade the rotating chassis during rotation, the side edge of the rotating chassis can be separated from the inner wall of the containing cylinder, and the rotating chassis is prevented from being abraded during rotation. Therefore, even if the rotating chassis is abraded with the inner wall of the accommodating cylinder, the separated impurities cannot enter the solution at the upper part, so that the problem that the solution is polluted is solved.

The invention discloses a gas-liquid atomization rotational flow mixing reaction device which comprises a mounting bracket, the mixing reaction chamber is detachably mounted on the mounting bracket through a bolt; the communicating chamber is detachably mounted at the top of the mixing reaction chamber through a bolt; the gas-liquid separation chamber is detachably mounted at the top of the communicating chamber through a bolt; the atomizing nozzle is fixedly connected to the mixing reaction chamber; the driving unit and the indicating unit are installed on the pressure regulating unit, and one end of the gas feeding pipe is fixedly connected to the atomizing nozzle. By adopting a gas-liquid atomization and rotational flow self-stirring structure, the problems that traditional mechanical stirring is slow in mixing, poor in uniformity and unbalanced in local proportion are fundamentally solved, the phenomena of back mixing and short circuit are eliminated, the reaction is more sufficient, crystallization is more uniform, the yield is higher, meanwhile, a stirring mechanism is omitted, the device is simplified, energy consumption is reduced, parameters such as pH and temperature are fed back more timely, and the production efficiency is improved. And the control precision is greatly improved.

The invention relates to a gas reaction device and a gas reaction method for preparing graphene. The device comprises a shell, a reaction part and a catalyst circulating mechanism, wherein the reaction part and the catalyst circulating mechanism are arranged in the shell; the reaction part comprises a catalyst cavity for accommodating a molten metal catalyst at the lower end and a gas reaction cavity positioned above the catalyst cavity, and the gas reaction cavity is provided with a gas inlet and a gas outlet; the catalyst circulating mechanism comprises a conveying assembly and a distribution assembly, the distribution assembly is arranged at the top of the gas reaction cavity, a plurality of through holes are formed in the bottom of the distribution assembly, and the conveying assembly continuously conveys a metal catalyst in the catalyst cavity to the distribution assembly in the gas reaction period; the metal catalyst in the distribution assembly cavity seeps out through the through holes, the reaction gas makes contact with catalyst liquid drops in the gas reaction cavity at the reaction temperature, graphene is generated on the surfaces of the liquid drops, and the graphene drips into the catalyst cavity along with the catalyst; the graphene is separated from the metal catalyst within the catalyst chamber. The device can continuously catalyze the gas reaction.

The invention relates to the technical field of reactor liquid level control, in particular to a gas-liquid two-phase continuous flow type reactor and a liquid level control method, and the method comprises the following steps: obtaining relevant parameters in the operation process of the reactor in real time; acquiring a liquid level stable value and a liquid level deviation value of the reactor at the current moment; obtaining the fitness of each parameter vector; in the process of iteratively acquiring the optimal parameter vector at the current moment by using the intelligent optimization algorithm, acquiring the convergence factor adjustment rate during each iteration based on the closeness degree between the fitness of the parameter vector during each iteration and the distance between the parameter vectors; further acquiring a convergence factor during each iteration; and controlling the liquid level of the gas-liquid two-phase continuous flow reactor by utilizing the optimal parameter vector and combining a PID (Proportion Integration Differentiation) control algorithm. The invention aims to improve the stability of controlling the liquid level of the reactor.

The invention discloses reaction separation equipment for preparing phosphorus oxyfluoride, which comprises a reaction separation tower body, the lower end of the reaction separation tower body is sequentially provided with a feeding zone, a plurality of reaction zones and a separation zone from top to bottom, the feeding zone and the separation zone are fixedly filled with first filler layers, and the reaction zones are filled with second filler layers; the heat exchange mechanism comprises a heat exchange medium inlet container and a heat exchange medium outlet container, a plurality of heat exchange guide pipes are evenly distributed on the periphery of the heat exchange medium inlet container and the periphery of the heat exchange medium outlet container respectively, and heat exchange medium circulation pipes pre-buried in the second packing layer are longitudinally connected between the heat exchange guide pipes respectively; corresponding driving pipe fittings are upwards and rotationally mounted at the feeding ends of the heat exchange medium inlet pipes respectively; and a plurality of heat exchange medium discharge pipes. According to the invention, the reaction temperature uniformity in each reaction zone can be effectively improved, and the sufficient uniform distribution effect is ensured when materials slowly flow through the reaction zones.

The invention belongs to the technical field of comprehensive utilization of seawater resources, and particularly relates to a green circulation method and system integrating seawater desalination and high-efficiency bromine extraction of concentrated seawater, and the system comprises a seawater desalination unit, a pretreatment unit, an oxidation replacement unit, a bromine elementary substance blowing-out unit, a bromine elementary substance absorption and enrichment unit and a bromine rectification and purification unit which are sequentially connected in series, the pipelines of the units are communicated to form a continuous material channel; the seawater desalination unit is used for producing fresh water and enriching concentrated seawater; the pretreatment unit removes impurities through a security filter and adjusts pH through an acidification pool; the oxidation replacement unit mixes chlorine and concentrated seawater through a gas-liquid mixer, and a bromine solution is generated in a reaction tank; the stripping tower realizes bromine gas stripping through atomization spraying, a filler area and a gas distributor; the absorption tower enriches bromine into hydrobromic acid by using a sulfur dioxide aqueous solution; the rectification unit is oxidized by a distillation tower, condensed and separated to obtain liquid bromine. The method realizes synchronous recovery of fresh water and bromine resources, conforms to a green circulation concept, and has remarkable economic and ecological benefits.

The utility model belongs to the technical field of chemical solvent preparation, and particularly relates to a tetrahydrofuran purification device. The utility model provides a tetrahydrofuran purification device. The tetrahydrofuran purification device comprises a feed port, a catalytic hydrogenation reaction part, a gas phase discharge port, a liquid phase discharge port, a heavy component removal tower and an absorption tower. In the application, through the catalytic hydrogenation part, the impurity dihydrofuran in the tetrahydrofuran is hydrogenated to generate the tetrahydrofuran, the impurities n-butyraldehyde and isobutyraldehyde are hydrogenated to generate alcohols which are easily separated from the tetrahydrofuran, through determination, the content of the impurity dihydrofuran in the purified tetrahydrofuran is reduced to 3 ppm or below, the alcohols are separated in the heavy component removal tower, and the content of the tetrahydrofuran in the tetrahydrofuran is reduced to 3 ppm or below. The purity and the quality of tetrahydrofuran are effectively improved, and the purification device structure and the purification process are simple.

The utility model discloses a packing absorption tower convenient to regulate and control packing dosage, which comprises an absorption tower main body and a spraying mechanism, one side of the absorption tower main body is fixedly connected with a drawer type packing frame through a fixing component, and the bottom of the drawer type packing frame is provided with a lower through hole. A driving motor on the lifting mechanism drives a lifting lead screw to rotate clockwise or anticlockwise so as to drive a lifting threaded sleeve to ascend and descend, the lifting threaded sleeve can drive a pressing plate to ascend and descend, the size of a filling space between the pressing plate and the drawer type filling frame can be adjusted and controlled by adjusting the height of the pressing plate, and the using amount of filling can be adjusted and controlled according to actual requirements; the drawer type filler frame is fixed through the fixing assembly, the drawer type filler frame can be disassembled by rotating and disassembling the locking threaded sleeve on the fixing assembly, filler in an inner cavity of the drawer type filler frame can be replaced or the inner cavity of the drawer type filler frame can be cleaned by pulling and taking out the drawer type filler frame, and use is convenient.

The invention discloses a mixed reaction device of a shell-and-tube heat exchanger tube box, which belongs to the technical field of chemical heat exchange equipment and comprises a tank horizontally mounted on the side of the heat exchanger tube box, and a gas-phase material inlet tube and a liquid-phase material inlet tube are mounted on the side wall of the tank. Two baffle plates, two perforated baffle plates and a buffer baffle plate are arranged in the tank body, the two baffle plates are positioned between the two perforated baffle plates, and the buffer baffle plate is mounted on one side close to the heat exchanger tube box. According to the mixed reaction device of the tube box of the shell-and-tube heat exchanger, two or more strands of materials enter the tank body through the baffle plate, the perforated baffle plate and the buffer baffle plate which are specially designed in the tank body, are fully mixed and then are fully reacted through the baffle plate, the perforated baffle plate and the buffer baffle plate; and then entering the shell side of the heat exchanger to exchange heat with a shell pass cold (hot) medium, so that a series of problems such as tube bundle pull-off, tube bundle thinning, non-uniform mixing and incomplete conversion are solved.

The invention discloses a chemical-corrosion-resistant ceramic general filler, belongs to the technical field of ceramic fillers, and aims to solve the problem that gas and liquid cannot fully react due to the fact that the residence time effect of the ceramic filler on the gas and the liquid is short, the chemical-corrosion-resistant ceramic general filler comprises a shell, and a first inner ring is arranged in the shell; a plurality of evenly-distributed first separation rings are fixed to the inner side wall of the first inner ring, a second inner ring is arranged in the first inner ring, and a plurality of evenly-distributed second separation rings are fixed to the outer side wall of the second inner ring. A first separation ring, a second separation ring, a third separation ring, a fourth separation ring, a fifth separation ring and a sixth separation ring are arranged among a first inner ring, a second inner ring, a third inner ring and a fourth inner ring, so that when the ceramic packing is vertically placed, gas or liquid moves among the first inner ring, the second inner ring, the third inner ring and the fourth inner ring, and the gas or the liquid can be separated from the first inner ring, the second inner ring, the third inner ring and the fourth inner ring; the stroke can be increased, so that the residence time of gas and liquid is prolonged, and the gas and the liquid are fully reacted.

A decomposition method and a decomposition apparatus for resin capable of safely and efficiently decomposing a resin are provided. A decomposition apparatus for resin 10 includes: a cylinder 12; a resin supplier 11 supplying a thermoplastic resin to the cylinder 12; a screw 12a transporting the supplied thermoplastic resin and a melt-plasticized thermoplastic resin; a fluid supplier 13 supplying a heated and pressurized fluid into the cylinder in order to decompose the melt-plasticized thermoplastic resin in a subcritical state or a supercritical state; an extruder 14 provided at a tip of the cylinder 12 and discharging a decomposed product of the thermoplastic resin to outside of the cylinder; a rotary drive mechanism 15 rotationally driving the screw 12a; and a cooling mechanism 16 being capable of cooling the cylinder 12.

To provide a gas-liquid contact device which is advantageous for improving gas-liquid contact efficiency.SOLUTION: A gas-liquid contact device 1 comprises a gas liquid contact unit 2 which has a plurality of areas which are in communication with each other in a horizontal direction and each of which has a filler 22 installed therein. The filler 22 includes first filling members 50 and second filling members 51 which are shaped in plates parallel to a direction of supply of liquid L to the fillers 22 and a direction of supply of a gas G, and which are laid on top of each other. The first filling members 50 and the second filling members 51 are at least partially waved plates, where a waviness direction of the wave plates of the first filling member 50 and a waviness direction of the wave plates of the second filling member 51 are inclined in opposite directions to each other with respect to a vertical direction.SELECTED DRAWING: Figure 3

The utility model belongs to the technical field of tail gas treatment, and particularly relates to a multi-stage tail gas purifier which comprises a closed shell, a mandrel, a reaction chamber, a tail gas flow channel structure and a liquid flow channel structure. The plurality of reaction chambers are arranged in the closed shell along the axis direction of the mandrel, and a rotor is arranged in each reaction chamber; the liquid flow channel structure enables the reaction liquid to enter the rotor and be thrown out to the reaction chamber after being accelerated by the rotor; and the tail gas flow channel structure and the liquid flow channel structure enable the tail gas flow direction and the liquid flow direction in each reaction chamber to react in the reaction chamber in opposite directions. According to the utility model, the tail gas flow direction and the liquid flow direction in each reaction chamber are opposite, namely the tail gas flows clockwise, the liquid flows anticlockwise or the tail gas flows anticlockwise and the liquid flows clockwise, so that the liquid and the tail gas thrown out at a high speed can violently collide and react in the reaction chamber, and the reaction efficiency can be improved; and the tail gas is purified more thoroughly.

The application discloses a mass transfer enhanced gas-liquid reactor, which is characterized in that a feeding inlet and a tail gas outlet are arranged on a reactor shell, and a discharging outlet is arranged at the bottom; a stirring device comprises at least one group of stirring paddles arranged in the reactor shell; a gas distribution device is fixedly connected in the reactor shell and comprises an outer cover with an upper opening and a lower opening and a gas distributor sleeved in the outer cover, a gas-liquid passage with an annular cross section is formed between the outer cover and the gas distributor, a longitudinal section of the gas-liquid passage is S-shaped, a gas distribution hole is arranged on the side, and a gas inlet pipe is communicated with the gas distribution hole. The mass transfer enhanced gas-liquid reactor has the advantages of promoting the dissolution and transmission of gas, greatly improving the gas atom economy, saving energy, uniform stirring, complete fermentation, fast reaction speed and the like.

To provide reactors permitting the oligomerization of olefins to give linear olefins.SOLUTION: There is provided a reactor, comprising: a reactor chamber 1 of elongate shape along the vertical axis; a plurality of n oligomerization zones Zn, which are delimited by internal compartmentalization walls 2, 4 arranged along the vertical axis of the chamber 1 and which are each able to contain a liquid part of catalytic activity and a gaseous part; means for connecting the n oligomerization zones in series; means for introducing, into the first compartment Z1, a flow comprising an olefinic feedstock E1; means for withdrawing, from the final compartment Zn, an oligomerization effluent E5, wherein n is an integer between 2 and 10; the internal compartmentalization walls are arranged in such a way as to delimit the n oligomerization zones Zn; and the n oligomerization zones Zn is interconnected in series so as to be able to transfer a liquid phase of catalytic activity from a zone Zn-1 to an adjacent zone Zn by way of the connection means.SELECTED DRAWING: Figure 2