CN104130401A - Process pressure control in nylon synthesis - Google Patents
Process pressure control in nylon synthesis Download PDFInfo
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- CN104130401A CN104130401A CN201410143121.1A CN201410143121A CN104130401A CN 104130401 A CN104130401 A CN 104130401A CN 201410143121 A CN201410143121 A CN 201410143121A CN 104130401 A CN104130401 A CN 104130401A
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- liquid
- water
- vacuum pump
- reservoir
- steam
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/04—Preparatory processes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
- C08G69/28—Preparatory processes
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyamides (AREA)
Abstract
A system is configured for continuous polyamide synthesis. The system includes a vent condenser and a vacuum pump. The vent condenser is coupled to a polymerization finisher. The vent condenser has a liquid reservoir and a vent discharge port above a level of the liquid reservoir. The vacuum pump is coupled to the vent discharge port by an intake line. The vacuum pump has an output port and a rotary shaft. A gaseous mixture proximate the vent discharge port is removed at a rate determined by a speed of the rotary shaft. The vacuum pump is configured to have a liquid ring seal.
Description
The cross reference of related application
The application requires the benefit of priority of the U.S. Provisional Patent Application number 61/818,240 of submitting on May 1st, 2013, and its disclosure is combined in this with its full content by reference.
Technical field
The present invention relates to a kind of synthetic system of continuous polymeric amide that is configured for.
Background technology
Polymeric amide uses following methods preparation: wherein by diamines (for example, hexa-methylene-1,6-diamines) and dicarboxylic acid is (for example, hexanodioic acid), sometimes be the form of the ammonium carboxylate salt of these the two kinds of components in water, (for example,, at the temperature within the scope of 180 DEG C to 300 DEG C) polymerization under polycondensation condition.Condensation reaction produces polymeric amide (for example, nylon 6,6) and the water as by product.In some cases, the early stage step of the method comprises ammonium carboxylate salts concentrated, afterwards this solution is transferred in reactor.The process of concentrated ammonium carboxylate salts produces water, described water as discharge of steam to atmosphere or be condensed to form liquid water.Typically the liquid water of condensation is put into the sewerage of polymeric amide production plant afterwards.
Successive polymerization manufacture method can be included in the vent condenser (vent condenser) in finisher (finisher) downstream.Can use injector to extract out from vent condenser gaseous mixture.Injector is by making steam produce vacuum through Wen's device.In order to extract enough vacuum out, a large amount of steam is passed through.In an example, the steam that needs about 450Kg/ hour is to produce enough vacuum.It is expensive producing steam, and injector produces the exhaust steam of large volume.In addition, may comprise from the output of injector the pollutent of extracting out from vent condenser.These pollutents may need to be removed, and cause thus other cost.
Typical synthetic method of polymers is problematic, because they depend critically upon process steam.Process steam aspect production cost, be possible be broker's costliness and may be expensive on environment producing refuse and consuming aspect limited resources.In addition, the system based on process steam can not be controlled in the mode that produces high volume, high-quality product.
Summary of the invention
An example of theme of the present invention comprises a kind of liquid ring vacuum pump.Liquid ring vacuum pump (LRVP) produces vacuum by rotating paddle in the eccentric cavity in shell.Blade is attached to turning axle regularly.The liquid ring of eccentric cavity periphery provides the sealing with very low friction resistance.Sealing fluid ring provides by water, oil or other fluids.In Multi-instance, extract or provide the aperture on the shell of pump by fluid-encapsulated out from vacuum.LRVP can be single-stage or stage pump.
An example of theme of the present invention uses LRVP to be used for controlling manufacturing process.LRVP can use the supply of once-through seal fluid or the fluid-encapsulated supply of recirculation, or mixes fluid-encapsulated supply.Use the example system of LRVP can move economically and with good precision control.
Example of theme of the present invention uses LRVP to produce vacuum, for the vent condenser extraction gaseous mixture from being connected with the finisher of continuous polymerization process.
In some instances, to be created in injector in the relevant vacuum of the steam that uses compare, the LRVP of theme of the present invention can significantly still less provide vacuum under energy expenditure.In some instances, with in polymeric blends, use and there is the equipment of more substantial metal and metallic contact, the method that forms vacuum as mechanical blade pump is compared, the LRVP of theme of the present invention can produce at run duration impurity significantly still less in polymeric blends, as less iron (it can be gel catalyst).In some instances, with in being included in polymeric blends, there is larger metal compared with the mechanical blade pump of metallic contact or the polymerization process of other pumps, the impurity of the less amount producing at run duration is as iron, can allow the polymerization process that comprises LRVP to experience less gelation, high-quality product and the line duration of vast scale are more provided.
This summary of the invention intention provides the general introduction of subject of this patent application.It is not intended to provide the exclusiveness of subject matter or exhaustive to explain.Comprise and describing in detail so that the further information about present patent application to be provided.
Brief description of the drawings
In the accompanying drawing of not necessarily drawing in proportion, identical numeral can be described the similar parts in different views.The same numbers with different letter suffix can represent the different situations of similar parts.Accompanying drawing, by the mode of example, but the fixed mode of not-go end, the Multi-instance that example is usually discussed in this article.
Fig. 1 example is according to the diagram of the system for the manufacture of polymeric amide of an example.
Fig. 2 example is according to a part for the polymeric amide manufacturing system of an example.
Fig. 3 example is according to a part for the polymeric amide manufacturing system of an example.
Fig. 4 example is according to a part for the polymeric amide manufacturing system of an example.
Fig. 5 example is according to the schema of the method for the manufacture of polymeric amide of an example.
Embodiment
As used herein, term " dicarboxylic acid " broadly refers to C
4-C
18alpha, omega-dicarboxylic acid.This term scope comprises C
4-C
10alpha, omega-dicarboxylic acid and C
4-C
8alpha, omega-dicarboxylic acid.By C
4-C
18α, the example of the dicarboxylic acid that alpha, omega-dicarboxylic acid comprises comprises, but be not limited to succsinic acid (butane diacid), pentanedioic acid (pentane diacid), hexanodioic acid (hexane diacid), pimelic acid (heptane diacid), suberic acid (octane diacid), nonane diacid (nonane diacid) and sebacic acid (decane diacid).In some instances, C
4-C
18alpha, omega-dicarboxylic acid is hexanodioic acid, pimelic acid or suberic acid.In some instances, C
4-C
18alpha, omega-dicarboxylic acid is hexanodioic acid.
As used herein, term " diamines " broadly refers to C
4-C
18α, ω-diamines.This term scope comprises C
4-C
10α, ω-diamines and C
4-C
8α, ω-diamines.By C
4-C
18α, the example of the diamines that ω-diamines comprises includes, but are not limited to, butane-Isosorbide-5-Nitrae-diamines, pentane-1,5-diamines and hexane-1,6-diamines, also referred to as hexamethylene-diamine.In some instances, C
4-C
18α, ω-diamines is hexamethylene-diamine.
In some instances, expect the use of hexanodioic acid and hexamethylene-diamine combination herein.
As used herein, term " polymeric amide " broadly refers to that polymeric amide is as nylon 6, nylon 7, nylon 11, nylon 12, nylon 6,6, nylon 6,9; Nylon 6,10, nylon 6,12, or their multipolymer.
In some instances, be polymeric amide by the polymkeric substance of carrying out a kind of method or moving a kind of system manufacture.Polymeric amide can be synthetic by the diamines of the dicarboxylic acid of straight chain and straight chain, or the oligopolymer forming from the diamines of the dicarboxylic acid by straight chain and straight chain is synthetic.Polymeric amide can comprise nylon 6,6.
Dicarboxylic acid can have structure HO C (O)-R
1-C (O) OH, wherein R
1c
1-C
15alkylidene group, as methylene radical, ethylidene, propylidene, butylidene, pentylidene, hexylidene, sub-heptyl, octylene, nonamethylene or sub-decyl.Dicarboxylic acid can be hexanodioic acid (for example, R
1=butylidene).
Diamines can have structure H
2n-R
2-NH
2, wherein R
2c
1-C
15alkylidene group, as methylene radical, ethylidene, propylidene, butylidene, pentylidene, hexylidene, sub-heptyl, octylene, nonamethylene or sub-decyl.Diamines can be hexamethylene-diamine, (for example, R
2=butylidene).
Fig. 1 example for the manufacture of polymeric amide, and especially for manufacturing the example system 10 of nylon 6,6.System 10 comprises heating and the multiple parts from reaction mixture vaporize water, and described reaction mixture comprises the oligopolymer being formed by the dicarboxylic acid of straight chain and the diamines of straight chain.The oligopolymer being formed by the dicarboxylic acid of straight chain and the diamines of straight chain can be polyamide salt, as the nylon salt being combined to form by hexanodioic acid and hexamethylene-diamine.Oligopolymer can comprise the combination of the diacid of individual molecule and the diamines of individual molecule, as hexa-methylene two ammonium adipates.Oligopolymer can be the product of the diacid of one or more than one molecule and the diamines of one or more than one molecule.The mixture that comprises oligopolymer can also comprise unreacted diamines and unreacted diacid.The oligopolymer that the mixture that comprises oligopolymer can comprise all lengths with the ratio of any appropriate.
The heating of the mixture that comprises oligopolymer and evaporation can be enough at least some water to remove from mixture.In this article, in the time that description removes water, the water removing can be at least one in the following: the initial water existing in mixture, formed water that acid amides produces, reacted the water that forms acid amides generation by diacid or diamines with oligopolymer by diacid and diamine reactant, and reacted to form the water of acid amides generation by a kind of oligopolymer with another kind of oligopolymer.
System 10 can comprise reservoir 12, and it is for example configured to hold, for example, in liquid phase or the solvent of liquid phase (, water) and the mixture of dicarboxylic acid and diamines, the oligopolymer (salt) being formed by it substantially, or the aqueous solution of their combination.Reservoir 12 can be for mixing or store the aqueous solution of ammonium carboxylate salt.
Dicarboxylic acid and diamines can be added to reservoir 12 with equimolar ratio substantially.Can, by starting material or aqueous solution preheating, be introduced into again afterwards the reservoir 12 as thering is pre-heaters, or can be by the aqueous solution in the interior heating of reservoir 12, as utilize well heater or utilize steam, as the steam forming in another part of system 10.
Reaction mixture can be transferred to vaporizer 14 from reservoir 12 via pipeline 16.Vaporizer 14 can reacting by heating mixture and from its vaporize water, promotes balance further towards polyamide products.In vaporizer 14, can leave vaporizer 14 via pipeline 8 from the water of reaction mixture evaporation.Reaction mixture can be heated in vaporizer 14 to the temperature of any appropriate, 100-230 DEG C according to appointment, or 100-150 DEG C, or below approximately 100 DEG C, or more than approximately 110 DEG C, 120,130,140,150,160,170,180,190,200,210,220 DEG C or approximately 230 DEG C.The reaction mixture that leaves vaporizer 14 via pipeline 22 can have the water of the % by weight of any appropriate, the water of 5-50 % by weight according to appointment, or the water of about 25-35 % by weight, or approximately 25 below % by weight, 26 % by weight, 27,28,29,30,31,32,33,34 % by weight or the above water of approximately 35 % by weight.Reaction mixture in vaporizer 14 can be transferred to reactor 18 via pipeline 22.
Reactor 18 can reacting by heating mixture and from its vaporize water, promotes balance further towards polyamide products.The water of the reaction mixture evaporation from reactor 18 can leave and enter condenser 24 via pipeline 26, and it can be condensed to be formed on the liquid water that leaves condenser 24 in pipeline 28 there.Liquid water in pipeline 28 can suitably process and in reservoir 12, in the miscellaneous part of factory use again, or can be discarded in water drain.The heat being absorbed by condenser 24 can be in the miscellaneous part of factory, as used in pre-heaters again.Reaction mixture can be heated in reactor 18 to the temperature of any appropriate, 150-400 DEG C according to appointment, or about 250-350 DEG C, or about 250-310 DEG C, or below approximately 200 DEG C, or more than approximately 210 DEG C, 220,230,240,250,260,265,270,275,280,285,290,295,300,305,310,320,330,340 DEG C or approximately 350 DEG C.The reaction mixture that leaves reactor 18 via pipeline 32 can have the % by weight water of any appropriate, according to appointment 0.000, 1 % by weight to 20 % by weight, 0.001 to 15 % by weight, or approximately 0.01 to 15 % by weight, or approximately 0.000, below 1 % by weight, or approximately 0.001 % by weight, 0.01, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.2, 1.4, 1.6, 1.8, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 % by weight, or approximately 20 is more than % by weight.Reaction mixture in reactor 18 can be transferred to flasher 30 via pipeline 32.
Flasher 30 can reacting by heating mixture and from its vaporize water, promotes balance further towards polyamide products.Flasher 30 can comprise the serpentine tube that at least one is grown relatively.In flasher 30, along with reaction mixture is advanced downstream, pressure can little by little reduce.At the temperature of flasher 30 interior risings, the pressure reducing being gradually applied on reaction mixture removes water with the form that flashes off devaporation from reaction mixture.Along with steam is gone out from reaction mixture flash distillation, the first polyamide polymer can experience further polymerization to form the second polyamide polymer.In the exit of flasher 30, can form the two-phase mixture of gaseous steam and reaction mixture.Reaction mixture can be heated in flasher 30 to the temperature of any appropriate, 150-400 DEG C according to appointment, or about 250-350 DEG C, or about 250-310 DEG C, or below approximately 200 DEG C, or more than approximately 210 DEG C, 220,230,240,250,260,265,270,275,280,285,290,295,300,305,310,320,330,340 DEG C or approximately 350 DEG C.The reaction mixture that leaves flasher 30 via pipeline 34 can have the water of the % by weight of any appropriate, according to appointment 0.000,1 % by weight to 2 % by weight, 0.001 to 1 % by weight, or approximately 0.01 to 1 % by weight, or approximately 0.000,1 below % by weight, or approximately 0.001 % by weight, 0.01,0.05,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.0,1.2,1.4,1.6,1.8 % by weight or more than approximately 2 % by weight.Reaction mixture in flasher 30 can be transferred to finisher 208 via pipeline 34.
Finisher 208 can reacting by heating mixture and from its vaporize water, promotes balance further towards polyamide products, to obtain the polymerization degree scope of final required polyamide products.Finisher 208 can further remove water so that the second polyamide polymer experiences further polymerization to form the final polyamide polymer of the scope with final required molecular weight or molecular weight.Selected final required molecular weight or molecular weight ranges can depend on the concrete required character of polyamide products.In finisher 208, removing water can obtain by apply high temperature and vacuum pressure to reaction mixture.Be applied to the vacuum pressure of finisher 208 by control, and the residence time of reaction mixture in finisher 208, can control the molecular weight ranges of final polyamide polymer.Reaction mixture can be heated in finisher 208 to the temperature of any appropriate, 150-400 DEG C according to appointment, or about 250-350 DEG C, or about 250-310 DEG C, or below approximately 200 DEG C, or more than approximately 210 DEG C, 220,230,240,250,260,265,270,275,280,285,290,295,300,305,310,320,330,340 DEG C or approximately 350 DEG C.The reaction mixture that leaves finisher 208 can have the % by weight water of any appropriate, according to appointment 0.000,1 % by weight to 2 % by weight, 0.001 to 1 % by weight, or approximately 0.01 to 1 % by weight, or approximately 0.000,1 below % by weight, or approximately 0.001 % by weight, 0.01,0.05,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.0,1.2,1.4,1.6,1.8 % by weight or the above water of approximately 2 % by weight.
To be sent to downstream for further processing from the discharge of finisher 208.Further processing can comprise adjusting relative viscosity, rotation and granulation.Reaction mixture in finisher 208 comprises the polymeric amide with required polymerization degree scope, and in an example, in the temperature of about 280 DEG C.
Manufacturing in nylon 6,6, the crosslinked of polymeric amide is unfavorable, because it causes the gel formation in polymeric amide synthesis technique.Gel formation and then cause the pollution of polymeric amide, this needs maintenance of the equipment more frequently and relevant factory to stop.
An example of theme of the present invention relates to the relative viscosity of the product of controlling synthetic method.Relative viscosity is the measuring of ratio of the solution measured under specified temp in capillary viscosimeter and solvent viscosity.According to ASTM D789-06, relative viscosity is 8.4 % by weight polyamide solution in 90% formic acid (water of 90 % by weight formic acid and 10 % by weight) at the viscosity (in centipoise) of 25 DEG C and the independent 90% formic acid ratio the viscosity (in centipoise) of 25 DEG C.Relative viscosity can be associated with measuring of molecular weight.
In an example, relative viscosity regulates by using liquid ring vacuum pump to extract controlled vacuum out on vent condenser.Vent condenser is connected to finisher 208.Regulate relative viscosity to comprise and use sensor and be connected to the motor-driven controller execution feedback method for LRVP.
Fig. 2 example system 200A, it describes an example of the processing relevant to some element in the downstream of finisher 208 and finisher 208.
Materials'use bend pipe 210 from finisher 208 is sent to vent condenser 216.Material flows on by arrow 272 indicated directions.
Shown in example in, vent condenser 216 comprises the vertical tower with the weir (weir) 218 that is placed in upper area.Weir 218 can comprise the annular wall of the bottom with open top and sealing.Be sent to that water (or other fluids) in weir 218 can overflow in over top and, in this example, illustrate as the drop 220 of the reservoir 224 that falls into the bottom place that is arranged in vent condenser 216.As shown in by arrow 214, water is supplied with to weir 218 by valve 212.
Except weir 218, or replace weir 218, vent condenser 216 can comprise nozzle.Nozzle (in the example shown in not being presented at) can distribute the water of current, water droplet or atomization in the upper area of vent condenser 216.
Be back to the turbulent flow in the flow rate effect vent condenser 216 of vent condenser 216.For example, under high flow rate (at valve 212 places), sprinkling can produce more aerosols in the gaseous mixture above reservoir 224, and therefore affects upstream device.Can select to obtain required Fabrication parameter to water flow velocity, nozzle structure, weir 218 structures, vacuum level and other factors.Glassware for drinking water in reservoir 224 has fluid level 222.
Discharge from reservoir 224 is sent to receiving tank 232 by pipeline 228A (being sometimes referred to as normal atmosphere pipeline).Receiving tank 232 (being sometimes referred to as hot well) comprises weir 234.Weir 234 remains on material in receiving tank 232, until volume exceedes by the volume shown in horizontal plane 230 (height by weir 234 is established).Water at liquid level 236 places is discharged at pipeline 240 by aperture 238 from receiving tank 232, as shown in by arrow 242.Pipeline 242 can be connected to groove (not shown) or sanitary sewer system (not shown).
Gaseous material in vent condenser 216 transports in pipeline 226 by vacuum.Pipeline 226 is being connected to vent condenser 216 higher than the position of fluid level 222.
Liquid ring vacuum pump 246A vacuumizes and output is disposed to strainer 252A in pipeline 226.Strainer 252A can comprise stacking washer.Shown in example in, the in the future discharge of inherent filtration device 252A is disposed to atmosphere by pipeline 254 in the direction being represented by arrow 256.
The amount of the vacuum of being aspirated by liquid ring vacuum pump 246A in an example, is determined by the speed of rotation of axle 248A.In this example, axle 248A is connected to electric motor 250A.Motor 250A is provided electric energy and is controlled by controller 258A by measuring line service (not shown).In an example, motor 250A has the rated output of about three horsepowers.In an example, motor 250A is other modes on-electric and that Control Shaft speed is provided.
In shown example, controller 258A comprises the computer 270 that is connected to sensor 266.Computer 270 comprises treater 260, storer 262 and interface 264.Storer 262, interface 264 and sensor 266 are communicated by letter with treater 260.Treater 260 is configured to carry out instruction to carry out for controlling the algorithm of LRVP246A.Algorithm can comprise the signal operation motor 250A based on from sensor 266.Storer 262 provides storage for instruction with the data relevant to controlling LRVP246A.Interface 264 can comprise keyboard, touch pad, screen, printer, socket, or the miscellaneous part that is configured to allow user monitoring or controls the performance of LRVP246A.
Sensor 266 is connected to 270 by passage 268.Passage 268 can comprise wired or radio communication line.Sensor 266 can comprise pressure transmitter, vacuum transducer, flow sensor, temperature sensor, level sensor, timing register, load transducer, or is configured to provide the miscellaneous part of the signal that the operation of LRVP246A can be based on its control.
The amount of the vacuum of extracting out in addition, can be by regulating the valve control being connected with LRVP246A.For example, valve can be configured to lie is set or be configured in low (vacuum) side or height (pressure) side of LRVP246A emptying for LRVP246A.Valve position can be by treater 260 signal control based on from sensor 266.
LRVP246A can extract from finisher the gas of any appropriate volume out.In some instances, liquid ring vacuum pump can be extracted about 10m out
3/ h is to approximately 50,000m
3/ h, about 20m
3/ h is to approximately 30,000m
3/ h, about 50m
3/ h is to approximately 20,000m
3/ h, or about 10m
3below/h, or approximately 20,30,40,50,75,100,125,150,175,200,250,300,400,500,600,700,800,900,1,000,1,500,2,000,2,500,5,000,10,000,20,000,30,000,40,000 or approximately 50,000m
3/ h.
LRVP246A can be made up of the combination of the material of any appropriate or material.In some instances, LRVP246A can comprise stainless steel, and as austenitic steel, ferritic steel, martensitic steel, and they are with the combination of the ratio of any appropriate.Stainless steel can comprise a series of stainless steels of any appropriate, as for example 440A, 440B, 440C, 440F, 430,316,409,410,301,301LN, 304L, 304LN, 304,304H, 305,312,321,321H, 316L, 316,316LN, 316Ti, 316LN, 317L, 2304,2205,904L, 1925hMo/6MO, 254SMO.Austenitic steel can comprise 300 Series Steel, for example, have the most about 0.15% carbon, and minimum approximately 16% chromium, and enough nickel or manganese keep austenitic structure with whole temperature substantially of the fusing point from low-temperature region to alloy.Austenitic steel can comprise, for example, 304 and 316 steel, as 316L steel.In some instances, LRVP246A can comprise corrosion resistant material.The example of corrosion resistant material can comprise superalloy, as the nickel-copper alloy of other elements that contain a small amount of iron and trace as
400, precipitation strengthen Ni-Fe-Chrome metal powder as
board alloy, for example
800 series, or austenitic-chromium system
board alloy, or Ni-Cr-Mo alloy as
board alloy, for example,
.The example of corrosion resistant material can comprise the corrosion resistant material of any appropriate, for example, as super austenitic stainless steel (AL6XN, 254SMO, 904L), duplex stainless steel (for example 2205), super-duplex stainless steel (for example 2507), nickel system alloy (for example alloy C276, C22, C2000, 600, 625, 800, 825), titanium alloy (for example 1, 2, 3 grades), zirconium alloy (for example 702), Hasteloy276, two-phase 2205, super two-phase 2507, Ebrite26-1, Ebrite16-1, Hasteloy276, Duplex2205, 316SS, 316L and 304SS, zirconium, zirconium clothing 316, Ferralium255, or their arbitrary combination.
LRVP246A can reduce the cost relevant to steam injector, as the cost of the cost of water and generation steam.Although be useful on the electric cost of motor 250A, compared with steam injector, LRVP246A can provide significant cost of energy to save.For example, LRVP246A can be provided as 0.01% to 95% cost of energy of the cost of energy of steam injector, or be steam injector cost of energy approximately 1% to approximately 80%, or approximately below 0.01%, approximately 0.1,1,2,4,6,8,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90% or approximately 95%.
As compared with mechanical blade pump, LRVP246A can be configured in polymeric blends, to have less metal and metallic contact with other equipment.For example, by using liquid ring as sealing, LRVP246A avoids the metal to metal wearing and tearing between impeller tips and pump case inner side.In some instances, LRVP246A can have approximately 0.000 in the polymer reaction mixture that leaves pump, 1ppm is to about 200ppm iron, or about 0.001ppm is to about 25ppm iron, or approximately 0.000, below 1ppm, 0.000,5,0.001,0.005,0.01,0.05,0.1,0.5,1,1.5,2,2.5,3,4,5,6,7,8,9,10,15,20,25,30,35,40,45,50,75,100,125,150,175, or more than about 200ppm.Leave ppm iron in the reaction mixture of pump and can be than the amount of leaving ppm iron in the corresponding reaction mixture of mechanical blade pump any appropriate still less, according to appointment 0.01% to 95%, or approximately 1% to approximately 80%, or approximately below 0.01%, approximately 0.1,1,2,4,6,8,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90% or approximately 95%.Iron can be gelling catalyst; Reduce iron level and can reduce gel generation.The gel of pump downstream generation every day can be the amount of any appropriate, and can be less than the amount of the respective reaction mixture generation of leaving mechanical blade pump, approximately be proportional to the minimizing of the iron level of the reaction mixture occurring from this pump, according to appointment 0.000,1Kg gel/sky to about 100Kg/ gel/sky, about 0.001Kg gel/sky to about 50Kg gel/sky, or approximately 0.000,1Kg gel/sky, 0.000,5,0.001,0.005,0.01,0.05,0.1,0.5,1,2,3,4,5,10,15,20,25,50,75 or about 100Kg/ gel/sky.
Fig. 3 example the system 200B of an example of the description processing relevant to some element in finisher 208 and finisher 208 downstreams.
Materials'use bend pipe 210 from finisher 208 is sent to vent condenser 216.Material flows on by arrow 272 indicated directions.
In shown example, vent condenser 216 comprises the vertical tower with the weir 218 that is placed in upper area.Weir 218 can comprise the annular wall of the bottom with open top and sealing.Be sent to that water (or other fluids) in weir 218 can overflow in over top and, in this example, illustrate as the drop 220 of the reservoir 224 that falls into the bottom place that is arranged in vent condenser 216.As illustrated by arrow 314, water is supplied to weir 218 by valve 308.
Glassware for drinking water in reservoir 224 has fluid level 222.Pipeline 228B is transported to pump 302 by water from reservoir 224.
Pump 302 will be transported to strainer 304 from the discharge of reservoir 224.Pump 302 is extracted out from the pipeline 228B that is connected to reservoir 224.Valve 310 allows the discharge of excessive water, as illustrated at arrow 312 places.The water discharging from valve 310 can be disposed to groove (not shown) or sanitary sewer system (not shown).Valve 310 can regulate to control the water level by pump 302 recirculation automatically.Strainer 304 is connected with water cooler 306 and valve 308.
Gaseous material in vent condenser 216 transports by the vacuum in pipeline 226.Pipeline 226 is being connected to vent condenser 216 higher than the position of fluid level 222.
Liquid ring vacuum pump 246B extracts vacuum out and output is disposed to strainer 252B in pipeline 226.Strainer 252B can comprise lamination washer.In shown example, the discharge of the device of inherent filtration in the future 252B empties to atmosphere by pipeline 254 in the direction being represented by arrow 256.
The amount of the vacuum of being extracted out by liquid ring vacuum pump 246B is determined by the speed of rotation of axle 248B.In this example, axle 248B is connected to electric motor 250B.Motor 250B provides power and is controlled by controller 258B by measuring circuit service (not shown).
Controller 258B can comprise analog processor or digital processing unit.In an example, controller 258B comprises treater 260, storer 262, interface 264 and sensor 266.
Fig. 4 example the system 200C of an example of the description processing relevant to some element in finisher 208 and finisher 208 downstreams.
Materials'use bend pipe 210 from finisher 208 is sent to vent condenser 216.Material flows on by arrow 272 indicated directions.
In shown example, vent condenser 216 comprises the vertical tower with the weir 218 that is placed in upper area.Weir 218 can comprise annular wall, and described annular wall has open top and the bottom of sealing.Be sent to that water (or other fluids) in weir 218 can overflow in over top and, in this example, illustrate as the drop 220 of the reservoir 224 that falls into the bottom place that is arranged in vent condenser 216.
In an example, water is supplied to weir 218 by pipeline 408, valve 402 and pipeline 404, as shown by arrow 412 and arrow 406.The water of supply, as illustrated by arrow 412, can comprise softening water.
Glassware for drinking water in reservoir 224 has fluid level 222.Discharge from reservoir 224 is used pipeline 228C to discharge shown at arrow 428.
Gaseous material in vent condenser 216 is transported by the vacuum in pipeline 420, as illustrated by arrow 430.Pipeline 420 is connected to vent condenser 216 (in the position higher than fluid level 222) and is connected to container 416 at the second end at first end.Container 416 can be considered as to a steam-liquid trap.
Container 416, is sometimes referred to as and pounds out tank, has the top discharge outlet that is connected to vacuum pipeline 418.Pipeline 418 transports gaseous mixture (as illustrated at arrow 432) from container 416, and therefore, extracts vacuum from vent condenser 216 out by means of pipeline 420.Process steam condensation and water of obtaining in container 416 are discharged by pipeline 426, and transport, as illustrated at arrow 428 places.Water is supplied to container 416 by pipeline 408, as illustrated at arrow 434 places.
Liquid ring vacuum pump 246C vacuumizes and output is disposed to strainer 252C in pipeline 418.Strainer 252C can comprise lamination washer.In shown example, in the direction being represented by arrow 256, empty to atmosphere by pipeline 254 from the discharge of strainer 252C.Water from strainer 252C by pipeline 424 as by arrow 422 shown in direction discharge.
Supplied by pipeline 436 for the fluid-encapsulated of LRVP246C, in the direction of being pointed out by arrow 438, flow.In an example, the fluid-encapsulated water and same that comprises, pipeline 436 can be connected to pipeline 408 or another supply line.In Fig. 2 and example illustrated in fig. 3, being respectively used to the fluid-encapsulated of LRVP246A and LRVP246B is provided by vent condenser 216, but, in other examples (as illustrated at LRVP246C place in Fig. 4), independent supply line (for example, pipeline 436) provides to vacuum pump 246C fluid-encapsulated.
Valve 414 is connected to pipeline 418 and is connected to the discharge from pipeline 254 at the second end at first end.Valve 414 can regulate to walk around LRVP246C and therefore, controls the vacuum of extracting out from container 416.
The amount of the vacuum of extracting out by LRVP246C is determined by the speed of rotation of axle 248C.In this example, axle 248C is connected to electric motor 250C.Motor 250C is by measuring circuit service power supply (not shown) and being controlled by controller 258C.
Controller 258C can comprise analog processor or digital processing unit.In an example, controller 258C comprises treater 260, storer 262, interface 264 and sensor 266.
Fig. 5 example for the manufacture of the schema of the method 500 of polymeric amide.Method 500,510, is included in reservoir 224 tops and produces gaseous mixture.Reservoir 224 can comprise the condensation in the vent condenser 216 that is connected to the polymerization finisher 208 in continuous polymeric amide synthesis system.
520, method 500 comprises that use vacuum pump 246C extracts gaseous mixture out.Vacuum pump 246C can comprise the LRVP246C that electric motor 250C drives.Vacuum level, and therefore gaseous mixture removes speed, the speed of turning axle 248C that can be based on LRVP246C is determined.
Can use controller 258C to control or regulate the drive-motor 250C for LRVP246C.Controller 258C can comprise mimic channel or digital processing unit.The in the situation that of digital processing unit, can be by carrying out the software control LRVP246C that is stored in the algorithm in storer 262 as instruction.In Multi-instance, this algorithm uses sensor signal to control LRVP258C.Sensor signal can produce from the sensor 266 in response to pressure, vacuum, temperature, fluid level, load or other measuring parameters.
LRVP246C utilizes fluid ring so that sealing to be provided.Fluid-encapsulated can be by condensation supply or by independent fluid orifice supply in vacuum pipeline 418.Fluid-encapsulatedly can comprise water, oil or other fluids.Effect heating by the fluid of liquid ring that is supplied to LRVP246C by rotating paddle and in an example, by fluid recovery, filtration, cooling and be recycled to LRVP246C with the flow velocity of about 1 to 5 gallon per minute.In an example, continuous polymerization process uses cleaning water for fluid-encapsulated.In an example, batch polymerization process is used and is used for fluid-encapsulated from the condensation product of technique.
Embodiment
continuous polymerization process.in the embodiment providing, carry out following methods in this part.In continuous nylon 6,6 manufacture method, hexanodioic acid and hexamethylene-diamine are blended in water with about equimolar ratio in salt pond, to form the aqueous mixture that contains nylon 6,6 salt with approximately 50 % by weight water.Salt brine solution (aqueous salt) is transferred to vaporizer with about 105L/ minute.Vaporizer is heated to about 125-135 DEG C (130 DEG C) by salt brine solution and water is removed from the salt brine solution of heating, makes water concentration reach approximately 30 % by weight.The salt mixture of evaporation is transferred to reactor with about 75L/ minute.Reactor makes the temperature of the salt mixture of evaporation reach about 218-250 DEG C (235 DEG C), allows reactor further to remove water from the salt mixture of the evaporation of heating, makes water concentration reach approximately 10 % by weight, and causes the further polymerization of salt.The mixture of reaction is transferred to flasher with about 60L/ minute.Flasher is heated to about 270-290 DEG C (280 DEG C) to allow flasher further to remove water from reaction mixture by the mixture of reaction, makes water concentration reach approximately 0.5 % by weight, and the further polymerization of the mixture inducing reaction.The mixture of flash distillation is transferred to finisher with about 54L/ minute.Finisher makes polyblend stand vacuum further to remove water, makes water concentration reach approximately 0.1 % by weight, so that polymeric amide obtains suitable final polymerization degree scope before the polyblend that aftercondensated is crossed is transferred to forcing machine and tablets press.
for determining the general method of gel fraction.each gel fraction of describing in embodiment is determined by the mean value of getting the gel fraction definite by two kinds of methods.In the first method, reaction mixture remain hot in, liquid reaction mixture is discharged from system, by system cools, dismounting, and visual inspection is with the volume of gel wherein of estimation.In the second method, reaction mixture remain hot in, liquid reaction mixture is discharged from system, cooling, fill water, and discharge water.The volume of the water of discharging from the system never system bulk of gel deducts to determine the volume of the gel system.For the gel fraction in one or more concrete part or the specific position downstream of definite equipment, only the system water in the concrete part of equipment or specific position downstream is filled.In two kinds of methods, the density of gel be it is estimated as 0.9g/em
3.
Variable X has identical value in whole embodiment.
Embodiment 1a. comparative example. finisher, has barometric pipe recirculation and mechanical blade pump.
Carry out continuous polymerization process.Discharge from finisher is sent to vent condenser.Vent condenser comprises the liquid reservoir that is equipped with vent line.Vent line, is sometimes referred to as barometric pipe, is connected to the low spot in reservoir.The pump that is connected to barometric pipe is sent to strainer and water cooler by liquid from reservoir, and makes thereafter fluid be back to be positioned at the weir on vent condenser top and injector to be arranged.
The point of vacuum pipeline above liquid reservoir is connected to vent condenser.Vacuum pipeline is connected to 304 austenitic steel mechanical blade pumps, and it extracts 1000m out
3/ h.Vacuum pump is disposed to washer and empties to thereafter atmosphere.Provide the electric power of function to spend about X/ to mechanical blade pump.The polymeric blends that leaves mechanical blade pump has about 3ppm iron.Whole amounts of the gel producing in the system of vacuum pump downstream are about 0.5Kg gel/sky.
Embodiment 1b. comparative example. finisher, has barometric pipe recirculation and steam injector.
Comparative example 1 provides below, but replaces mechanical blade pump, uses 304 austenitic steel steam injectors, and it extracts 1000m out
3/ h.Steam injector uses 34,000,000Kg steam/year, cost 3*X/.Steam needs the water of 1,500,000,000L/, cost X/.Therefore, steam injector need to about 4*X/ with operation.
Embodiment 1c: finisher, has barometric pipe recirculation and liquid ring vacuum pump.
Carry out continuous polymerization process.To be sent to vent condenser 216 from the discharge of finisher 208.Vent condenser 216 comprises the liquid reservoir 224 that is equipped with vent line.Vent line, is sometimes referred to as barometric pipe, is connected to the low spot in reservoir 224.The pump that is connected to barometric pipe is sent to strainer and water cooler 306 by liquid from reservoir 224, and makes thereafter fluid be back to arrange to be positioned at weir 218 and the injector on vent condenser 216 tops.
The point place of vacuum pipeline 420 above liquid reservoir 224 is connected to vent condenser 216.Vacuum pipeline 420 is connected to 304 austenitic steel liquid ring vacuum pump 246C, and it extracts 1000m out
3/ h.LRVP246C is disposed to washer and empties to thereafter atmosphere.Leave the polymeric blends of LRVP246C containing having an appointment 0.5ppm iron, this total amount by the gel producing in the system of vacuum pump downstream is reduced to about 0.1Kg gel/sky, 20% gel production rate in the method that comprises the mechanical blade pump in comparative example 1a, Parking permitted and clean between longer amount stream time.Be about X/ to providing the electric power of power via drive-motor 250C to LRVP246C, make the method than the method that comprises the steam injector in comparative example 1b more effectively about 400%.
Embodiment 2a: comparative example. finisher, has barometric pipe discharge and mechanical blade pump.
Carry out continuous polymerization process.Discharge from finisher is sent to vent condenser.Vent condenser comprises the liquid reservoir that is equipped with vent line.Vent line, is sometimes referred to as barometric pipe, is connected to the low spot in reservoir.Liquid in barometric pipe is set to receiving tank route.Receiving tank, is sometimes referred to as hot well, comprises weir and discharge outlet.Receiving tank is disposed to sanitary sewer.Independent water supply line is connected to the weir and the injector arrangement that are positioned at vent condenser top.
The point of vacuum pipeline above liquid reservoir is connected to vent condenser.Vacuum pipeline is connected to 304 austenitic steel mechanical blade pumps, and it extracts 1000m out
3/ h.Vacuum pump is disposed to washer and empties to thereafter atmosphere.Provide the electric power of power to spend about X/ to mechanical blade pump.The polymeric blends that leaves mechanical blade pump has about 3ppm iron.The total amount of the gel producing in the system of vacuum pump downstream is about 0.5Kg gel/sky.
Embodiment 2b: comparative example. finisher, has barometric pipe discharge and steam injector.
Comparative example 2 provides below, but replaces mechanical blade pump, uses 304 austenitic steel steam injectors, and it extracts 1000m out
3/ h.Steam injector uses 34,000,000Kg steam/year, cost 3*X/.Steam needs the water of 1,500,000,000L/, cost X/.Therefore, steam injector need to about 4*X/ with operation.
Embodiment 2c: finisher, has barometric pipe discharge and liquid ring vacuum pump.
Carry out continuous polymerization process.To be sent to vent condenser 216 from the discharge of finisher 208.Vent condenser 216 comprises the liquid reservoir 224 that is equipped with vent line.Vent line, is sometimes referred to as barometric pipe, is connected to the low spot 224 in reservoir.Fluid connection in barometric pipe is to receiving tank 232.Receiving tank 232, is sometimes referred to as hot well, comprises weir 234 and discharge outlet.Receiving tank 232 is expelled to sanitary sewer.Independent water supply line is connected to the weir 218 and the injector arrangement that are positioned at vent condenser 216 tops.
The point of vacuum pipeline 226 above liquid reservoir is connected to vent condenser 216.Vacuum pipeline 226 is connected to 304 austenitic steel LRVP246A, and it extracts 1000m out
3/ h.LRVP246A is disposed to washer and empties to thereafter atmosphere.Leave the polymeric blends of LRVP246A containing having an appointment 0.5ppm iron, this total amount by the gel producing in the system in the downstream of vacuum pump is reduced to about 0.1Kg/ days, for 20% of the gel production rate in the method that comprises the mechanical blade pump in comparative example 2a, Parking permitted and clean between longer stream time amount.To liquid ring vacuum pump being provided via drive-motor 250A the electric power cost X/ of power, make the method than the method that comprises the steam injector in comparative example 2b more effective about 400%.
Embodiment 3a: comparative example. finisher, has steam-liquid trap and mechanical blade pump.
Carry out continuous polymerization process.Discharge from finisher is sent to vent condenser.Vent condenser comprises the liquid reservoir that is equipped with vent line.Vent line, is sometimes referred to as barometric pipe, is connected to the low spot in reservoir.
The point of vacuum pipeline above liquid reservoir is connected to vent condenser.Vacuum pipeline is connected to the input aperture of steam-liquid trap.The fluid connection of extracting out from the low spot of steam-liquid trap is to the junction barometric pipe.The gaseous mixture of the liquid top in steam-liquid trap is extracted out by the vacuum pipeline that is connected to 304 austenitic steel mechanical blade pumps, and it extracts 1000m out
3/ h.Vacuum pump is disposed to washer and empties to thereafter atmosphere.Provide electric energy to spend about X/ to mechanical blade pump.The polymeric blends that leaves mechanical blade pump has about 3ppm iron.The total amount of the gel producing in the system of vacuum pump downstream is about 0.5Kg gel/sky.
Independent water supply line is connected to the top that is positioned at the weir on vent condenser top and injector and arranges and be connected to steam-liquid trap.
Embodiment 3b: comparative example. finisher, has steam-liquid trap and steam injector.
Comparative example 3 provides below, but replaces mechanical blade pump, uses 304 austenitic steel steam injectors, and it extracts 1000m out
3/ h.Steam injector uses 34,000,000Kg steam/year, cost 3*X/.Steam needs water/year of 1,500,000,000L, cost X/.Therefore, steam injector need to about 4*X/ with operation.
Embodiment 3c: finisher, has steam-liquid trap and liquid ring vacuum pump.
Carry out continuous polymerization process.To be sent to vent condenser 216 from the discharge of finisher 208.Vent condenser 216 comprises the liquid reservoir 224 that is equipped with vent line.Vent line, is sometimes referred to as barometric pipe, is connected to the low spot 224 in reservoir.
The point of vacuum pipeline 420 above liquid reservoir 224 is connected to vent condenser 216.Vacuum pipeline 420 is connected to the input aperture of steam-liquid trap 416.The fluid connection of extracting out from the low spot of steam-liquid trap is to barometric pipe.By the gaseous mixture of liquid top in steam-liquid trap 416, by 304 austenitic steel LRVP246C extractions, (it extracts 1000m out
3/ h), be disposed to washer, and empty to atmosphere.By-pass valve 414 connects inlet mouth and the delivery port of LRVP246C.
Independent water supply line is connected to the top that is positioned at the weir 218 on vent condenser 216 tops and injector and arranges and be connected to steam-liquid trap 416.Leave the polymeric blends of LRVP246C containing having an appointment 0.5ppm iron, the total amount of this gel producing in the system in the downstream of vacuum pump is reduced to about 0.1Kg/ days, for 20% of the gel production rate in the method that comprises the mechanical blade pump in comparative example 3a, Parking permitted and clean between longer stream time amount.Provide electric energy to spend about X/ to the liquid ring vacuum pump via drive-motor 250C, make the method than the method that comprises the steam injector in comparative example 3b more effectively about 400%.
Example 1 can comprise or use a kind of for the continuous synthetic system of polymeric amide, and described system can comprise or use vent condenser and vacuum pump.Described vent condenser is connected to polymerization finisher.Described vent condenser has liquid reservoir, and has the venting port above the liquid level of liquid reservoir.Described vacuum pump is connected to described venting port by admission line.Described vacuum pump has delivery port and has turning axle.Near gaseous mixture described venting port is removed with the definite speed of the speed by described turning axle.Described vacuum pump is configured to have liquid ring sealing.
Example 2 can comprise, or optionally with subject combination described in example 1, optionally to comprise, wherein said turning axle is connected to electric motor.
Example 3 can comprise, or optionally with subject combination described in example 2, optionally to comprise, be connected to the speed controller of described electric motor.
Example 4 can comprise, or optionally with subject combination described in example 3, optionally to comprise, wherein said speed controller is connected at least one in pressure transmitter, vacuum transducer, temperature sensor, fluid level sensor and load transducer.
Example 5 can comprise, or optionally with subject combination described in example 4, optionally to comprise, wherein said speed controller comprises the treater that is connected to storer, and described treater is configured to carry out the instruction being stored in described storer.
Example 6 can comprise, or optionally with example 1-5 in any one described in subject combination, optionally to comprise, wherein said vacuum pump comprises the fluid-encapsulated supply opening that is connected to water supply line.
Example 7 can comprise, or optionally with subject combination described in example 6, optionally to comprise, wherein said water supply line is connected to water cooler.
Example 8 can comprise, or optionally with example 1-7 in any one described in subject combination, optionally to comprise, wherein said admission line comprises steam-liquid trap.
Example 9 can comprise, or optionally with subject combination described in example 8, optionally to comprise, wherein said steam-liquid trap is connected to water supply line.
Example 10 can comprise, or optionally with example 1-9 in any one described in subject combination, optionally to comprise, be connected to the inlet mouth of described vent condenser, and comprise the relief outlet that is connected to described liquid reservoir, and wherein said relief outlet is connected to strainer, and described strainer is connected to described inlet mouth.
Example 11 can comprise, or optionally with subject combination described in example 10, optionally to comprise the water cooler being connected in series with described strainer.
Example 12 can comprise, or optionally with example 10-11 in any one described in subject combination, optionally to comprise, the fluid pump being connected in series with described strainer.
Example 13 can comprise, or optionally with example 1-12 in any one described in subject combination, optionally to comprise the relief outlet that is connected to described liquid reservoir, and wherein said relief outlet is connected to the input aperture of receiving tank.
Example 14 can comprise, or optionally with subject combination described in example 13, optionally to comprise, wherein said receiving tank comprises weir and leaves mouth, and wherein said input aperture and described in leave mouth and be arranged on the opposition side on described weir.
Example 15 can comprise, or optionally with example 1-14 in any one described in subject combination, optionally to comprise, wherein said delivery port is connected to atmospheric steam exhaust mouth.
Example 16 can comprise, or optionally with subject combination described in example 15, optionally to comprise, wherein said atmospheric steam exhaust mouth comprises lamination washer.
Example 17 can comprise, or optionally with example 1-16 in any one described in subject combination, optionally to comprise the by-pass valve being connected in parallel with described vacuum pump.
Example 18 can comprise, or optionally with subject combination described in example 17, optionally to comprise, wherein described gaseous mixture is removed with the definite speed of the rate of flow of fluid by by described by-pass valve.
Example 19 can comprise or use a kind of method of the polymerization finisher section of moving continuous polymeric amide synthesis system, described method can comprise or use, in the upper area of reservoir, produce gaseous mixture, and use vacuum that described gaseous mixture is extracted out from described upper area.Described gaseous mixture produces in the upper area of reservoir that is connected to described finisher.Described reservoir has the liquid level in the lower region of described reservoir.Use vacuum that described gaseous mixture is extracted out from described upper area, wherein remove the speed of speed corresponding to the turning axle of liquid ring vacuum pump.
Example 20 can comprise, or optionally with subject combination described in example 19, optionally to comprise, use electric motor to move described vacuum pump.
Example 21 can comprise, or optionally with subject combination described in example 19, optionally to comprise, use controller to regulate described speed.
Example 22 can comprise, or optionally with subject combination described in example 21, optionally to comprise, wherein regulate described speed to comprise and use treater execution algorithm.
Example 23 can comprise, or optionally with subject combination described in example 22, optionally to comprise, wherein carry out described algorithm and comprise the sensor signal receiving corresponding at least one of pressure, vacuum, temperature, fluid level and load.
Example 24 can comprise, or optionally with subject combination described in example 19, optionally to comprise, wherein discharge described gaseous mixture and comprise water is supplied to fluid-encapsulated mouthful of described vacuum pump.
Example 25 can comprise, or optionally with subject combination described in example 24, optionally to comprise, wherein provide water to comprise cooling described water.
Example 26 can comprise, or optionally with example 19-25 in any one described in subject combination, optionally to comprise, wherein extract described gaseous mixture out and comprise steam is removed from the steam-liquid trap that is connected to described upper area.
Example 27 can comprise, or optionally with subject combination described in example 26, optionally to comprise, water is supplied to described steam-liquid trap.
Example 28 can comprise, or optionally with example 19-27 in any one described in subject combination, optionally to comprise, liquid is removed from described lower region, filter described liquid, and make described liquid be back to described upper area.
Example 29 can comprise, or optionally with subject combination described in example 28, optionally to comprise, cooling described liquid.
Example 30 can comprise, or optionally with example 19-29 in any one described in subject combination, optionally to comprise, liquid is removed and described liquid is sent to receiving tank from described lower region.
Example 31 can comprise, or optionally with subject combination described in example 30, optionally to comprise, use weir and the discharge outlet expel liquid of described receiving tank.
Example 32 can comprise, or optionally with example 19-31 in any one described in subject combination, optionally to comprise, wherein extract described gaseous mixture out and comprise the output of described vacuum pump is disposed to atmosphere.
Example 33 can comprise, or optionally with example 19-32 in any one described in subject combination, optionally to comprise, walk around described vacuum pump with valve.
Each of these limiting examples can exist with himself, or can combine with multiple and one or more other arrangement or combinations of example.
More than describe in detail and comprise with reference to accompanying drawing, these accompanying drawings form a part for this detailed description.Accompanying drawing shows by way of example wherein can implement specific examples of the present invention.These examples can comprise except shown or describe those key element.But the present inventor has also expected the example of those key elements that wherein only provide shown or described.In addition, the present inventor also expects and uses about the particular instance illustrating herein or describe (or one or many aspects), or about shown in other examples (or one or many aspects) or the arbitrary combination of those key elements of describing (or one or many aspects) or the example of arrangement.
In the case of using with the contradiction between any document of being combined by reference herein, be as the criterion with usage herein.
In this article, use term " " or " one ", as conventional in patent documentation, for comprising one or more than one, and irrelevant with any other situation or the use of " at least one " or " one or more ".In this article, unless otherwise noted, use term "or" to represent nonexcludability, or so that " A or B " comprise " A but be not B ", " B but be not A " and " A and B ".In this article, term " comprise (including) " and " wherein (in which) " as the popular English use that " comprises (comprising) " with term separately and " wherein (wherein) " is of equal value.Equally, in claims, term " comprises " and " comprising " is open, the system, device, goods, composition, preparation or the method that comprise the key element those that list after such term in the claims, be still considered to drop in the scope of this claim.In addition, in claims, the uses that only serve as a mark such as term " first ", " second " and " the 3rd ", and be not intended to their object to apply digital requirement.
Method example described herein is machine or computer execution at least in part.Some examples can comprise computer-readable medium or machine readable media, and its coding has the instruction that can operate electron device is configured to carry out the method for describing in example as previously discussed.The execution of such method can comprise coding, as microcode, assembly language code, higher-level language code etc.Such code can comprise the computer-readable instruction for carrying out several different methods.Coding can form a part for computer program.In addition, in example, coding can be to be visibly stored in one or more volatibility, non-instantaneous or non-volatile tangible computer-readable medium, as during extruding or in other time.The example of these tangible computer-readable mediums can comprise, but be not limited to, hard disk, moveable magnetic disc, removable CD (for example, compact disk (CD) and digital video disk (DVD)), magnetic tape machine, storage card or rod, random access memory (RAM), read-only storage (ROM) etc.
More than describe and be intended to exemplary, and be nonrestrictive.For example, above-mentioned example (or one is individual or many aspects) can combination with one another use.Can use other example, as known after description more than reading in those skilled in the art.Provide summary to allow reader to determine fast the disclosed characteristic of technology.Should be understood that it is not used in scope or the implication explaining or limit claim.In addition,, in above detailed description in detail, multiple features can combine to simplify the disclosure.This should not be construed as intention, and the disclosed feature of failed call protection is necessary to any claim.On the contrary, subject matter can be to be less than all features of concrete disclosed example.Therefore, claims are bonded in detailed description thus as an example, and wherein each claim is using himself as independent example, and expect that such example can or arrange combination with one another with multiple combination.The scope of this theme should be with reference to claims, together with determining with the four corner of authorized these claim equivalences.
Claims (20)
1. a method for the polymerization finisher section of the continuous polymeric amide synthesis system of operation, described method comprises:
In the upper area of reservoir that is connected to described finisher, produce gaseous mixture, described reservoir has the liquid level in the lower region of described reservoir; With
Use vacuum that described gaseous mixture is extracted out from described upper area, wherein remove the speed of speed corresponding to the turning axle of liquid ring vacuum pump.
2. method claimed in claim 1, described method also comprises that use electric motor moves described vacuum pump.
3. method claimed in claim 1, described method also comprises that use controller regulates described speed.
4. method claimed in claim 3, wherein regulates described speed to comprise and uses treater execution algorithm.
5. method claimed in claim 4, wherein carries out described algorithm and comprises at least one the sensor signal receiving corresponding in pressure, vacuum, temperature, fluid level and load.
6. method claimed in claim 1, wherein discharges described gaseous mixture and comprises to the fluid-encapsulated mouth of described vacuum pump water is provided.
7. method claimed in claim 6, wherein provides water to comprise cooling described water.
8. method claimed in claim 1, wherein extracts described gaseous mixture out and comprises steam is removed from the steam-liquid trap that is connected to described upper area.
9. method claimed in claim 8, described method also comprises water is supplied to described steam-liquid trap.
10. method claimed in claim 1, described method also comprises liquid is removed from described lower region, filters described liquid, and makes described liquid be back to described upper area.
11. methods claimed in claim 10, described method also comprises cooling described liquid.
12. methods claimed in claim 1, described method also comprises liquid is removed and described liquid is sent to receiving tank from described lower region.
Method described in 13. claims 12, described method also comprises the weir and the discharge outlet expel liquid that use described receiving tank.
14. methods claimed in claim 1, wherein extract described gaseous mixture out and comprise the output of described vacuum pump is disposed to atmosphere.
15. methods claimed in claim 1, described method also comprises utilizes valve to walk around described vacuum pump.
16. 1 kinds for the continuous synthetic system of polymeric amide, and described system comprises:
Be connected to the vent condenser of polymerization finisher, described vent condenser has liquid reservoir and has the venting port above the liquid level of described liquid reservoir; With
Be connected to the vacuum pump of described venting port by admission line, described vacuum pump has delivery port and has turning axle, and near the gaseous mixture wherein said venting port is removed with the definite speed of the speed by described turning axle, described vacuum pump is configured to have liquid ring sealing.
System described in 17. claims 16, described system also comprises the inlet mouth that is connected to described vent condenser, and comprise the relief outlet that is connected to described liquid reservoir, and wherein said relief outlet is connected to strainer, and described strainer is connected to described inlet mouth.
System described in 18. claims 16, described system also comprises the relief outlet that is connected to described liquid reservoir, and wherein said relief outlet is connected to the input aperture of receiving tank.
System described in 19. claims 18, wherein said receiving tank comprises weir and leave mouth, and wherein said input aperture and described in leave mouth and be arranged on the opposition side on described weir.
System described in 20. claims 16, wherein said delivery port is connected to atmospheric steam exhaust mouth.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201361818240P | 2013-05-01 | 2013-05-01 | |
| US61/818,240 | 2013-05-01 |
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| CN104130401B CN104130401B (en) | 2018-05-29 |
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| CN201410143121.1A Active CN104130401B (en) | 2013-05-01 | 2014-04-10 | Operation pressure control in nylon synthesis |
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| CN (1) | CN104130401B (en) |
| TW (1) | TW201446837A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111905652A (en) * | 2020-07-16 | 2020-11-10 | 华峰集团上海工程有限公司 | Continuous polymerization reaction process of polyamide |
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| CN1219944A (en) * | 1996-05-24 | 1999-06-16 | 聚合物工程有限公司 | Process and device for continuous production of polyamides |
| CN1193060A (en) * | 1997-03-06 | 1998-09-16 | 包素文 | Water-proof air-permeable fabric and producing method thereof |
| CN1193060C (en) * | 2000-03-30 | 2005-03-16 | 拜尔公司 | Plyamide composition and method for producing the same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111905652A (en) * | 2020-07-16 | 2020-11-10 | 华峰集团上海工程有限公司 | Continuous polymerization reaction process of polyamide |
| CN111905652B (en) * | 2020-07-16 | 2021-06-04 | 华峰集团上海工程有限公司 | Continuous polymerization reaction process of polyamide |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201446837A (en) | 2014-12-16 |
| CN104130401B (en) | 2018-05-29 |
| WO2014179036A1 (en) | 2014-11-06 |
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