74results about "Liquid distribution in distillation" patented technology

The invention relates to the field of molecular distillation, in particular to distillation equipment for preparing high-quality silicone oil, which comprises a frame body, a distillation cylinder arranged in the middle of the frame body, a top cover arranged at the top of the distillation cylinder, a plurality of feed ports formed in the bottom of the top cover, a heating surface arranged outside the distillation cylinder, a condenser arranged inside the distillation cylinder, and a vacuum interface formed in the right lower part of the distillation cylinder, a distillate outlet is formed in the lower right portion of the distillation cylinder, a feeding port is formed in the right portion of the top cover, a film scraping frame is rotationally connected into the distillation cylinder and slidably connected with film scraping plates, the upper portion of the film scraping frame penetrates out of the top cover, the film scraping plates are symmetrically arranged on the film scraping frame, and gaps exist between the film scraping plates and the inner wall of the distillation cylinder. Through cooperation of the film scraping frame, the film scraping plate, the first servo motor, the connecting rod, the adjusting frame and other components, a liquid film formed on the inner wall of the distillation cylinder can be more uniform, and meanwhile, the thickness of the formed liquid film can be adjusted according to materials with different viscosities, so that the downward flowing speed of the liquid film tends to be consistent, and the optimal distillation effect is achieved.

The invention discloses flash tank equipment which comprises a flash tank, a feeding pipe, an exhaust pipe, a conical first heating flow guide body, a first oil way, an annular second heating flow guide body and a second oil way. And a tank wall convex part is arranged on the inner surface of the tank wall of the flash tank. A first oil cavity is formed in the first heating flow guide body, the first heating flow guide body is suspended below the spraying head at the lower end of the feeding pipe and is positioned above the convex part of the tank wall, and the first oil way is connected with the first heating flow guide body and is communicated with the first oil cavity. A second oil cavity is formed in the second heating flow guide body, the second heating flow guide body is arranged below the tip of the convex part of the tank wall, and the second oil way is connected with the second heating flow guide body and communicated with the second oil cavity, so that the heat transfer mode is improved, the heat transfer area and the heat transfer intensity are effectively increased, and the retention time of fluid materials is prolonged; the temperature of the lower half part of the flash tank is increased, so that the flash efficiency is improved, and the quality and the performance of polymer products are ensured.

The invention relates to the technical field of NMP (N-Methyl Pyrrolidone) recovery and refining, and discloses an NMP recovery liquid purification process for lithium battery production, which comprises the following steps: conveying an NMP recovery liquid to a primary rectifying tower to remove light components in the NMP recovery liquid to obtain an NMP material, then conveying the NMP material to a secondary rectifying tower to separate NMP from trace light components and heavy components, and then conveying the tower top gas (containing NMP and trace light components) of the secondary rectifying tower to a purifying tower so as to purify the NMP, condensing the gas output from the top of the purifying tower, refluxing the condensed gas into the purifying tower to serve as reflux liquid so as to ensure the normal work of the purifying tower, and refluxing one part of the tower bottom material of the purifying tower into the secondary rectifying tower so as to ensure the normal work of the purifying tower. The other part of the tower bottom material of the purification tower is output as a finished product, and a high-purity NMP product is obtained; the NMP product obtained by refining is high in recovery purity and relatively low in energy consumption and equipment cost.

The invention relates to a process for operating a mass transfer column comprising internals and at least one liquid distributor (1) for distributing a multi-phase liquid, wherein the liquid distributor (1) comprises a trough (9) for collecting the multi-phase liquid to be distributed onto internals in the mass transfer column, the trough (9) having a bottom (19) and side walls (7), wherein openings (17) for distributing the multi-phase liquid are formed in the trough (9) and / or in drip tubes (15) extending through the bottom (19) into the trough (9), wherein the openings (17) are arranged in at least three different heights. In the process, different phases of the multi-phase liquid separate into different layers in the trough, and the phases flow through openings at different heights, respectively.

The present invention provides a wet scrubber for gas abatement comprising a cleaning vessel defining a chamber, a gas inlet for supplying a gas to be scrubbed and a gas outlet for allowing the exit of the scrubbed gas, the gas inlet and the gas outlet being in fluid communication with each other, and one or more cleaning fluid supply ports, the wet scrubber comprising at least one distribution element connected to the cleaning fluid supply port for distributing the cleaning fluid inside the chamber, the at least one distribution element being a distribution plate comprising a cavity and a plurality of openings arranged to allow the cleaning fluid to flow from the cavity.

The present disclosure relates to a Rotating packed bed (RPB) (101) wherein the rotor assembly (106) is supported on a roller assembly (100) for improved mechanical integrity and low vibrations and a method (200) thereof. The roller assembly (100) includes at least three rollers (102) distributes a load that is disposed in a rotating shaft (103) of the rotor assembly (106). The at least three rollers (102) are adapted to configure in a pre-determined configuration i.e. in triangular pitch. The outer layer (104) is disposed an exterior surface (104-1) of each of the at least three rollers (102) respectively. Further, the rotating shaft (103) is positioned at the center of the first (102-1), the second (102-2), and the third (102-3) rollers, such that the rotating shaft (103) comes in contact with the outer layer (104) of the three rollers (102-1), (102-2), (102-3) thereby provide support to RPB (101).

The invention discloses a reactive distillation tower and maintenance equipment thereof, and belongs to the technical field of reactive distillation equipment. The device comprises a tower body, a flow dividing assembly is arranged on one side of the tower body and in the middle of the tower body, the flow dividing assembly comprises a flow dividing pipe, the bottom of the flow dividing pipe is fixedly connected with a flow dividing disc, the middle of the bottom of the flow dividing disc is fixedly connected with a lower flow dividing spray head, and the edge of the bottom of the flow dividing disc is fixedly connected with a plurality of side flow dividing spray heads. The side shunting nozzles are obliquely arranged towards the middle part of the shunting plate; according to the reactive distillation tower disclosed by the invention, the side shunting nozzles positioned on the outer side edges of the shunting assemblies are obliquely arranged towards the inner side, so that liquid flow sprayed by the side shunting nozzles can mutually impact liquid flow sprayed by the lower shunting nozzles in the side shunting nozzles, and the liquid flow cannot directly impact the inner wall of the tower body; therefore, the erosion loss speed of the anti-corrosion coating on the inner wall of the tower body is reduced, the service life of the reactive distillation tower is effectively prolonged, and the maintenance frequency is reduced.

The invention discloses a spraying structure for a devolatilization device, which comprises an outer pipe, a conveying pipe and a nozzle, the outer pipe is tightly connected with an input pipe of circulating hot water through an auxiliary pipe, and is used for receiving the supply of hot water; one end of the conveying pipe is firmly connected to the outer pipe, the other end of the conveying pipe extends into the kettle body and is tightly connected with the spray head, and a spraying opening of the spray head is arranged downwards; the outer pipes and the sprayers are arranged in two sets, each set of outer pipes is provided with one set of sprayers correspondingly connected with the outer pipes, and the upper set of sprayers and the lower set of sprayers are arranged in a staggered mode in the spatial layout.

The present invention provides a wet scrubber for gas abatement, comprising a scrubbing vessel defining a chamber, a gas inlet for supplying a gas to be scrubbed, and a gas outlet for allowing the egress of a scrubbed gas; the inlet and outlet being in fluid communication with one another; one or more scrubbing fluid supply ports; the wet scrubber comprising at least one distribution element connected to a scrubbing fluid supply port for distributing a scrubbing fluid inside the chamber; wherein at least one said distribution element is a distribution plate comprising a cavity and a plurality of apertures arranged to allow scrubbing fluid to flow from the cavity

The invention discloses a quenching discharge flash tower device, which belongs to the technical field of chemical production equipment and comprises a quenching discharge flash tower, one side of the quenching discharge flash tower is connected with a feeding pipeline, the other side of the quenching discharge flash tower is connected with a reflux water pipeline, and the reflux water pipeline is connected with a flow control valve and a flow indication controller. The liquid level transmitter is electrically connected with the liquid level meter indication controller, the bottom of the quench discharge flash tower reboiler is connected with a quench discharge flash tower kettle pump through a pipeline, the pipeline is connected with a gate valve a, a pressure meter a, a gate valve b and a liquid level control valve, and the liquid level indication controller is electrically connected with the liquid level control valve. The waste ethylene glycol can be prevented from being directly discharged in a flash evaporation mode to pollute the atmosphere, preheating of purified vapor-state water can be recycled for a follow-up process, energy consumption treatment of a compressor is not needed, the use cost is greatly saved, industrial waste heat can be efficiently utilized for efficiently preparing cold energy, the purposes of energy conservation, emission reduction and efficiency improvement are achieved, and the method is suitable for industrial production. The social benefit and the economic benefit are obvious.

The invention relates to a method for purifying ethylene carbonate from a crude ethylene carbonate composition, comprising the following steps: a) subjecting a crude composition comprising ethylene carbonate to at least one distillation step to obtain a pre-purified composition comprising at least 99.5% by weight of ethylene carbonate, and b) subjecting the pre-purified composition obtained in step a) to at least one melt crystallization step to obtain a purified ethylene carbonate composition wherein in step a) a bottom divided wall distillation column is used as a distillation column (if step a) comprises one distillation step) or as a first distillation column (if step a) comprises two or more distillation steps), and a bottom partition distillation column comprising a partition wall connected to the bottom of the bottom partition distillation column and extending upward from the bottom of the bottom partition distillation column by a portion of the height of the bottom partition distillation column, whereby a bottom section of the divided wall distillation column is subdivided into a first bottom sub-section and a second bottom sub-section as viewed from a cross-section of the divided wall distillation column.

The present invention relates to a process for purifying ethylene carbonate from a crude ethylene carbonate composition, said process comprising the steps of: a) subjecting a crude composition comprising ethylene carbonate to at least one distillation step to obtain a pre-purified composition comprising at least 99.5% by weight of ethylene carbonate; and b) subjecting the pre-purified composition obtained in step a) to at least one melt crystallization step to obtain a purified ethylene carbonate composition wherein the process is carried out in a plant comprising at least one distillation column, one vessel, at least one crystallizer and a feed line for a crude composition containing ethylene carbonate, wherein, if the apparatus comprises one distillation column, the distillation column, or, if the apparatus comprises two or more distillation columns, the first distillation column, comprising a top outlet line, a bottom outlet line and a side outlet line, wherein the at least one crystallizer comprises an inlet line for the pre-purification of the composition and an outlet line for the purification of the ethylene carbonate composition, and wherein the side outlet line of the distillation column is directly or indirectly connected to the inlet line of the at least one crystallizer for the pre-purification of the composition, wherein i) or the vessel is connected to the feed line for the crude composition containing ethylene carbonate and to an inlet line, where the inlet line is connected to a gas outlet of a first reboiler, where the first reboiler is further connected to a bottom outlet line of the distillation column, where the vessel further comprises an outlet line, where the outlet line is connected to a gas outlet of a second reboiler, where the first reboiler is further connected to a bottom outlet line of the distillation column. The outlet line leads to the inlet line of the distillation column via a second reboiler, in which a bottom fraction of the distillation column withdrawn from the distillation column via the bottom outlet line is partially evaporated in the first reboiler to obtain a gas fraction and a liquid fraction, or ii) the feed line for the crude composition containing ethylene carbonate is introduced into the distillation column, where the bottom outlet line of the distillation column leads to the vessel via a first reboiler, where the vessel comprises a gas outlet connected to the inlet line of the distillation column, where the bottom outlet line of the distillation column leads to the vessel via a second reboiler, where the gas outlet is connected to the inlet line of the distillation column. And the container comprises a liquid outlet which is connected with a pipeline leading into a second reboiler, the second reboiler comprises a gas outlet which is connected with an inlet pipeline of the distillation column, and the gas outlet is connected with a gas outlet of the distillation column. Wherein a bottom fraction of the distillation column withdrawn from the distillation column via the bottom outlet line is partially evaporated in the first reboiler, and wherein at least a portion of a gas fraction obtained in the first reboiler is recycled to the distillation column via the inlet line.

A scrubber (1) for cleaning of a gas comprises a casing (3) extending along a longitudinal central axis (x) and enclosing a scrubbing chamber (4). The casing has a gas inlet (5) and a gas outlet. The casing is configured to permit a gas flow of the gas to flow through the scrubbing chamber in a flow direction (F) from the gas inlet to the gas outlet. A deflector device (12) is provided in the scrubbing chamber between the gas inlet and the gas outlet and forms a gas passage (28) between the deflector device (12) and the casing (3). The deflector device comprises an upstream surface (16) facing the gas inlet. A spraying nozzle (8) is configured to spray a scrubbing liquid into the scrubbing chamber and the gas flow. A separation device (40) comprises a shield element (41) and is arranged between the upstream surface of the deflector device and the gas inlet. The shield element shields the upstream surface from the gas flow and is perforated by a plurality of holes.

A propylene oxide separation system comprising a heavies distillation column configured to receive a crude propylene oxide stream and discharge a heavies purge bottoms comprising at least one impurity selected from acetone, methanol, aldehydes, aldehyde derivatives, water, heavy hydrocarbons comprising C5+, or combinations thereof, and discharge a heavies distillation column overhead stream comprising a majority of the propylene oxide entering with the crude propylene oxide stream, and a first extractive distillation column configured to receive the heavies distillation column overhead stream and a first extraction solvent stream comprising a hydrocarbon solvent, and discharge a lights purge overhead comprising at least one impurity selected from aldehydes (e.g., acetaldehyde, formaldehyde, etc.) methyl formate, methanol, water, C3 hydrocarbons, C4 hydrocarbons, or combinations thereof, and discharge a rich solvent bottoms stream comprising a majority of the propylene oxide entering via the heavies distillation column overhead stream. A propylene oxide purification method is also provided.

The present invention relates to a fluid or liquid dispenser and to a method for dispensing a fluid or liquid using a dispenser. The dispenser may be employed in an evaporation or condensation unit for treating a fluid. A fluid dispenser 200 comprises one or more sets of at least two channels 210 arranged in a plane orthogonal to an axis of the dispenser that extends substantially perpendicularly in use. Each channel is continuous and comprises a base (211) and two upright side walls (212, 213). The channels may include concentric rings. Each channel is spaced from an adjacent channel by an opening 230 through the dispenser. Fluid supplied to the channel can flow through one or both side walls and drop from the distributor. Each channel is connected to an adjacent channel by a bridge portion 220 configured to provide fluid communication between the channels and configured to distribute fluid to the channels. Notches 214 and protrusions 215 may be provided to enable optimization of droplet size and distribution.

The present invention relates to a method for purifying ethylene carbonate from a crude ethylene carbonate composition, and this method is a) A step of subjecting a crude composition containing ethylene carbonate to at least one distillation step to obtain a pre-purified composition containing at least 99.5% by weight of ethylene carbonate, b) A step of subjecting the pre-purified composition obtained in step a) to at least one melt crystallization step to obtain a purified ethylene carbonate composition. Includes, This method is carried out in a plant comprising at least one distillation column, one vessel, at least one crystallizer, and a supply line for a crude composition containing ethylene carbonate, wherein if the plant comprises one distillation column, the distillation column, or if the plant comprises two or more distillation columns, the first distillation column, comprises a top discharge line, a bottom discharge line, and a side discharge line, and at least one crystallizer comprises an inflow line for a pre-purified composition and a discharge line for the purified ethylene carbonate composition, and the side discharge line of the distillation column is directly or indirectly connected to the inflow line for the pre-purified composition of at least one crystallizer. i) The vessel is connected to a supply line and an inlet line for a crude composition containing ethylene carbonate, the inlet line being connected to the gas outlet of a first reboiler, the first reboiler being further connected to a bottom discharge line of a distillation column, the vessel further comprising a discharge line leading to the inlet line of the distillation column via a second reboiler, the bottom fraction of the distillation column being taken out of the distillation column via the bottom discharge line being partially evaporated in the first reboiler to obtain a gaseous fraction and a liquid fraction, or, ii) A feed line for the crude composition containing ethylene carbonate leads to a distillation column, the bottom discharge line of the distillation column leads to a vessel via a first reboiler, the vessel has a gas outlet connected to the inlet line of the distillation column, the vessel has a liquid outlet connected to a line leading to a second reboiler, the second reboiler has a gas outlet connected to the inlet line of the distillation column, the bottom fraction of the distillation column taken out of the distillation column via the bottom discharge line is partially evaporated in the first reboiler, and at least a portion of the gaseous fraction obtained in the first reboiler is recirculated into the distillation column via the inlet line.

The present application discloses a flash evaporation device and a method for selectively extracting and recovering lithium from ternary positive electrode powder. The flash evaporation device comprises a tank body, a liquid inlet unit and a pressure control unit, wherein a steam line is provided at a top end of the tank body, a liquid discharge outlet is provided at a bottom end of the tank body, one end of the liquid inlet unit extends into the tank body and is provided with a limiting plate, and a side surface of the liquid inlet unit is provided with an air inlet; the pressure control unit is mounted on an outer side of the end of the liquid inlet unit located within the tank body, the pressure control unit comprises a blocking member sleeved over the outside of the liquid inlet unit, a first resilient member is arranged below the blocking member, and a second resilient member is arranged above the blocking member, a bottom end of the blocking member abuts against the first resilient member, and a top end of the blocking member is rotatably connected to the second resilient member. The flash evaporation device and the method for selectively extracting and recovering lithium from ternary positive electrode powder have high flash evaporation efficiency, and can effectively increase the concentration of lithium in leaching solutions.

The invention relates to the technical field of chemical separation, in particular to an ethylene glycol-water energy-saving separation system based on liquid phase atomization spraying, and the system comprises a tower kettle liquid phase feed atomizer which is arranged at the upper part of a tower kettle and is used for atomizing filtered tower kettle liquid phase feed into micron-sized liquid drops; the multi-layer tower tray is arranged above the tower kettle liquid phase feeding atomizer, is used for carrying out vapor-liquid two-phase mass transfer and separation on the tower kettle reboiler, is arranged at the bottom of the tower kettle, and is used for heating tower kettle liquid and generating ethylene glycol-water mixed steam. Sensible heat and latent heat of esterified mixed steam are efficiently utilized through an atomization spraying technology, preheating and steam stripping are carried out on spraying liquid, the heat load of a tower kettle reboiler is greatly reduced, and a novel separation technology system is constructed. Actual measurement data shows that under the same productivity, compared with a traditional process, the system saves energy by about 41.4%, can save heat energy by about 860,000 kilocalories per hour, equivalently reduces carbon emission by about 319kg CO2 per hour, and reduces carbon emission by about 2679.6 TCO2 per year.

The invention discloses a flash tank device. The flash tank device comprises a flash tank, a feeding pipe, an exhaust pipe and a conical shield body with a hot oil runner, a conical shield body is arranged in a tank body of the flash tank, a corrugated surface is arranged on the inner surface of the tank body, a hot oil runner is arranged in the conical shield body, the conical shield body filled with hot oil guides a fluid material subjected to spray flash to flow to the corrugated surface while realizing enhanced heat transfer, the fluid material is promoted to directly turn and impact the wall surface of the tank body, and the heat transfer effect is improved. The impacted fluid material loses momentum, so that the fluid material gradually slides downwards along the wall surface, the corrugated surface convex part disturbs the fluid material, the boundary layer of the fluid material is thinned, the heat transfer area is increased, more evaporation action time can be provided, the flash evaporation process is strengthened, and the flash evaporation effect is improved.

The present invention relates to a method for purifying ethylene carbonate from a crude ethylene carbonate composition comprising the steps of: a) subjecting a crude composition containing ethylene carbonate to at least one distillation step so as to obtain a pre-purified composition containing at least 99.5% by weight of ethylene carbonate and b) subjecting the pre-purified composition obtained in step a) to at least one melt crystallization step so as to obtain a purified ethylene carbonate composition, wherein in step a) as the distillation column, if step a) comprises one distillation step, or as the first distillation column, if step a) comprises two or more distillation steps, a bottom dividing-wall distillation column is used, which comprises a dividing wall being connected with and extending from the bottom of the bottom dividing-wall distillation column upwards over a part of the height of the bottom dividing-wall distillation column thereby subdividing the bottom section of the dividing-wall distillation column, seen in cross-section of the dividing-wall distillation column, into a first bottom subsection and into a second bottom subsection.

The present invention discloses a multi-stage continuous separation and recovery method for a mixed solvent containing explosives. By adopting a multi-stage short-range / molecular distillation method, the heating temperature is controlled at a relatively low temperature and the heating time is controlled within 2 minutes. There is no need to store a large amount of material, and safety accidents caused by solvent decomposition caused by high temperature and explosive explosion are effectively avoided. The method can realize the step-by-step recovery of multi-component solvents, effectively meet the reuse requirements of the recovered solvents, and is suitable for the recovery and separation of complex solvent systems.

A gravity-fed liquid distributor (1) comprises: • a lower plate (P) equipped with orifices through which liquid leaves the distributor to irrigate a lower element, • parallel parallelepiped-shaped channels (C) dedicated to the passage of the ascending gas, thus defining liquid channels above the lower plate, these channels being equipped with closure means on the upper part allowing both the diversion of the liquid, • the channels are distributed over a central circular section of the lower plate, creating a peripheral channel on the perimeter of the lower plate fluidly connected to the channels, • a plurality of plates (R1, R2) capable of guiding the liquid collected above the channels towards the peripheral channel, each plate having an elongated rectangular shape with two ends, with only one plate per channel.The plate is sealed at only one end so that at least the majority of the collected fluid flows towards the peripheral channel; the platelets are oriented at an acute or zero angle to the horizontal.

The present disclosure is related to the field of urea production, in particular urea strippers for removing ammonium carbamate, ammonia, and carbon dioxide from an aqueous urea solution comprising urea, ammonium carbamate, ammonia, and carbon dioxide, the urea stripper a plurality of electric heating elements.

The invention belongs to the technical field of butadiene, and particularly relates to a secondary extractive distillation internal C5 polymer online treatment mechanism which comprises a frame, a top tower, a middle tower, a bottom tower and a reboiler which are mounted on the frame, and an induction part, a cleaning part and a treatment part which are mounted in the frame, according to the online treatment mechanism for the C5 polymer in the second extractive distillation, the treatment component is arranged, a dispersing agent is injected into a feeding pipe of a middle tower, a treatment motor drives a rotating plate to rotate, a gear of the rotating plate is meshed with gears of stirring rods, and the rotating plate rotates to drive the multiple stirring rods to rotate synchronously, so that the dispersing agent in a treatment tank is mixed; a conveying tank is obliquely arranged on one side of the treatment tank and used for conveying a dispersing agent into the treatment tank, and a feeding port of a conveying pump sucks the mixed dispersing agent through a pipeline and conveys the dispersing agent into a filling pipe fixedly communicated with a discharging port of the conveying pump through a pipeline.

A desalination system and method for controlling the desalination system include thin-filmed photocatalyst coated glass tubes which perform a photocatalytic cleaning reaction to remove contaminants. A first flow control valve directs the contaminant-free feed water either to a feed water heater for pre-heating or to a geothermal energy-based heat exchanger. A second flow control valve directs a first portion of the pre-heated contaminant-free feed water to a thermal energy storage tank and a second portion to a flash chamber for steam generation. A condenser connected to the flash chamber includes a nano-fluid cooling coil that condenses steam into potable water.

The present disclosure relates to a reactive monomer separation device, and more specifically, to a reactive monomer separation device in which a structure of a feed supply unit is designed so that feed can be uniformly distributed inside a column, thereby improving column efficiency.

The invention concerns a method for providing a high-purity n-butanol product stream from a crude n-butanol feed stream by fractional distillation in a dividing wall column (102) including an upper section (104), a middle section and a lower section (110), the middle section including an inflow section (106) and an offtake section (108) laterally separated from each other by a dividing wall (112) fixed in the column, the crude n-butanol feed stream being fed to the inflow section (106) and the high-purity n-butanol product stream being withdrawn from the offtake section (108), the liquid stream flowing out of the upper section (104) being collected and divided into a first liquid stream (114) and a second liquid stream (116), the first liquid stream (114) being fed to the upper region of the offtake section (108) and the second liquid stream (116) being fed to the upper region of the inflow section (106), wherein the split ratio between the mass flow rate of the first liquid stream (114) and the mass flow rate of the second liquid stream (116) is from 2:1 to 5:1.

The present invention relates to a devolatilization apparatus for devolatilizing a composition comprising a volatile component, such as for devolatilizing a solid or liquid polymer composition comprising unreacted monomer, solvent and / or by-product, wherein the devolatilization apparatus comprises an inlet for the composition to be devolatilized and at least two vessels being arranged in series to each other, each of which comprising at least one distributor, an outlet line for devolatilized composition and an outlet for gas, wherein at least one distributor of the first, most upstream of the at least two vessels comprises at its upstream end an inlet and at its downstream end an outlet, wherein at least one static mixer is arranged directly upstream of the inlet or downstream of the inlet but upstream of the outlet of the distributor, wherein the inlet for the composition to be devolatilized is connected with the at least one static mixer, and wherein the outlet line for devolatilized composition of the first, most upstream of the at least two vessels is connected with a recirculation line leading into the at least one static mixer, with which the inlet for the composition to be devolatilized is connected.

A reactive monomer separation device in which a structure of a feed supply unit is designed so that feed can be uniformly distributed inside a column, thereby improving column efficiency. The feed supply unit includes a circular feed transfer pipe provided along an inner wall of a cylindrical column; one or more inner pipes extending in a direction of a central axis from the circular feed transfer pipe; and a spray nozzle provided at each end of the one or more inner pipes, and a spray angle (θ) of the spray nozzle is ≤a maximum spray angle defined by the following equation:maximum⁢ spray⁢ angle=2×tan-1(l / h)Equation⁢ (1)where l is a length of the inner pipe, and h is a height from a lower dual flow tray of the stage equipped with the feed supply unit to the feed supply unit.

The invention discloses an efficient circulating type rectifying tower for liquid purification, and belongs to the technical field of liquid purification rectifying towers, the efficient circulating type rectifying tower for liquid purification comprises a tower body for purifying liquid and a supporting frame fixedly installed outside the tower body, and the side of the tower body is connected with a liquid inlet pipe for controlling liquid to enter in a penetrating mode. The lower end of the tower body is communicated and connected with a liquid outlet pipe for controlling liquid to flow out, a reboiler is mounted on the liquid outlet pipe, and a gas inlet pipe for controlling gas to flow is communicated and connected between the reboiler and the tower body; the upper end of the tower body is communicated and connected with an air outlet pipe, a condenser is mounted on the air outlet pipe, a drainage pipe is communicated and connected below the condenser, and a return pipe for conveying condensed water is connected between the drainage pipe and the tower body; upper and lower circulating filtering groups are arranged in the tower body relative to the liquid inlet pipe; the rectifying tower can automatically adjust the gas circulation amount in the tower plates according to the change of the gas pressure in the tower, and gas-liquid balance in the tower is kept.