US3759308A - Plate evaporator for removing volatiles from liquids - Google Patents
Plate evaporator for removing volatiles from liquids Download PDFInfo
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- US3759308A US3759308A US00046283A US3759308DA US3759308A US 3759308 A US3759308 A US 3759308A US 00046283 A US00046283 A US 00046283A US 3759308D A US3759308D A US 3759308DA US 3759308 A US3759308 A US 3759308A
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- 239000003039 volatile agent Substances 0.000 title claims abstract description 43
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- WVQBLGZPHOPPFO-UHFFFAOYSA-N 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(1-methoxypropan-2-yl)acetamide Chemical compound CCC1=CC=CC(C)=C1N(C(C)COC)C(=O)CCl WVQBLGZPHOPPFO-UHFFFAOYSA-N 0.000 claims description 2
- 238000013023 gasketing Methods 0.000 abstract description 24
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000002174 Styrene-butadiene Substances 0.000 description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 2
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- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
- B01D1/221—Composite plate evaporators
Definitions
- the assembly includes one or more sets of port-type heat exchanger plates arranged in succession to provide a confined tortuous path of increased capacity for a high velocity flow of the volatiles-containing material. Variation of the gasketing of the plates, so as to include in the tortuous path the optimum number and combination of plate ports, provides increased capacity, while affording control of flow conditions within the assembly in correspondence with the sensitivities of the flowable material.
- One form of the assembly may constitute a plate contactor for effecting two-phase stripping of volatiles from the flowable ma-' terial.
- Another possible form may be a plate evaporator for enhancing evaporative removal of the volatiles.
- ADAM GEORGE GEBAUER his ATT RNE'YS Material Residue Patented Sept. 18, 1973 3 Sheets-Sheet 2 moZEEmw 9 7 3.522 HFEEB Qz mo SGmPZw now mm A ⁇ JJAJA J lmfi E u AKAK INVENTOR.
- This invention relates generally to the removal of volatiles from flowable materials by passing the volatilescontaining material through a plate assembly defining a confined, tortuous flow path and, in particular, to a novel plate assembly that provides a tortuous flow path of increased capacity and improved flow characteristics and that affords selective variation of the porting of the plates so as to allow control of flow pressures and velocities along the tortuous path. More specifically, these advantages are obtained in a plate assembly constructed of liquid-liquid heat exchanger plates of conventional port-type design through varying the gasketing of the plates to include in the flow path the optimum number and combination of plate ports for the particular flowable material to be treated.
- the process includes the steps of injecting a flowable material, in either liquid or solid form, containing a volatile substance to be removed into a high velocity stream of stripping gas so as to form a turbulent admixture of the gas as a continuous phase with discrete particles of the material dispersed therein, passing the admixture through a confined, tortuous path under controlled conditions of temperature, pressure, and velocity such that substantial volatilization, and hence stripping, of the volatile substance is effected within the tortuous path without degradation of the quality of the material being stripped, and exiting the resultant admixture of stripped material and volatiles-containing gas to a separator for separation of the gas and volatiles from the stripped material residue.
- Suitable apparatus for carrying out the process is also disclosed, including, among other components, a plate pack stripping unit,
- FIGS. 2 and 4 of the patent An exemplary construction of the plate contactor is illustrated in FIGS. 2 and 4 of the patent.
- a multiplicity of port-type heat exchanger plates of conventional liquid-liquid design are spaced apart by gaskets that are arranged to provide, with the plates, a number of narrow spaces or passageways for passage of the continuous gas or vapor phase containing particles of the flowable material.
- gaskets of the contactor are arranged to include only a single port at each end of the plates in communication with the adjacent elongate passageway.
- each of the plates has one inlet port through which the admixture of the flowable material and stripping vapor flows into the adjacent passageway and one outlet port through which the admixture is exited from the passageway, with the inlet and outlet ports being diagonally positioned at opposite ends of the plate.
- the inlet ports of the plates are coaxially aligned and successively positioned to provide a port-formed inlet conduit extending along the bottom of the contactor.
- thesuccessive outlet ports of the plates provide an outlet conduit along the top of the contactor.
- the throughput capacity of the contactor is in certain circumstances determined by the characteristics of the particular material to be stripped. For example, where the material is heat-sensitive, the capacity is often limited by the pressure drop across the contactor. On the other hand, when shear-sensitive materials are involved, the capacity is frequently limited by the flow velocity through the ports and into and out of the plate interspaces. It will be appreciated, therefore, that the cross-sectional flow area of the portformed inlet and outlet conduits, as well as the area available for flow to and from the plate interspaces, or passageways, may be determinative of the suitability of the contactor for stripping specific flowable materials.
- a plate assembly constructed of a multiplicity of port-type liquid-liquid heat exchanger plates is gasketed so as to include in the confined tortuous path defined by the plates of the assembly an additional number of inlet ports, outlet ports, or both, to provide port-formed inlet and outlet conduits, and inlet and outlet areas between the respective conduits and the parallel passageways between the plates, of increased cross-sectional area, thus affording a plate assembly of increased capacity for a'given plate size.
- the plate assembly may be constructed of one or more sets of plates, with each set including a predetermined, although not necessarily equal, number of plates to define a predetermined number of elongate passageways.
- each set including a predetermined, although not necessarily equal, number of plates to define a predetermined number of elongate passageways.
- the outlet conduits of alternate sets in the series are positioned in face-to-face relationship with the inlet conduits of the next succeeding set of plates so that the material flowing through the assembly is intermittently changed in direction as it flows through the passageways defined by the respective sets of plates.
- gasketing of the plates may be varied among the sets to provide the desired combination of inlet and outlet ports along the tortuous path.
- the combination selected will depend upon the sensitivity of the flowable material to heat or flow velocity and will be such as to afford a maximum mass transfer of material without causing damage to the material, as might result, for example, from excessive pressure drops across the assembly or too high velocities in the ports or plate interspaces.
- the plates of at least one set will have two or more outlet ports included in the tortuous path, and that each succeeding set in the assembly will enlist at least a corresponding number of inlet and outlet ports in each plate, that is to say, each succeeding set will have at least two inlet conduits and two outlet conduits included in the flow path.
- the first set to include two outlet conduits need not, however, be the foremost set in the series, so that, if desired, the foremost set could enlist only a single inlet port and a single outlet port in each plate, and a succeeding set, such as the second set in the series, could be gasketed to form the two outlet conduits. Notwithstanding the foregoing, the foremost set of the assembly may be gasketed to provide two or more inlet or outlet conduits if considerations of flowable material quality require such an arrangement.
- a plurality of sets of plates need not be used, of course, and similar advantages of increased flow capacity, extended utility of conventional heat exchanger plates, and improved flow characteristics are obtainable with a plate assembly having a single set of plates.
- FIG. I is a schematic representation of a system for two-phase stripping of volatiles from a flowable material, illustrating a feed tank for the material to be stripped, an injector device for dispersing the flowable material in the form of discrete particles into a continuous phase gas or vapor flow, a plate contactor constructed according to the present invention, and a separator for separating the volatiles-containing vapor from the stripped material;
- FIG. 2 is a diagrammatic view of one form of conventional liquiddiquid heat exchanger plate gasketed to include one inlet port and one outlet port in the flow path, and providing for diagonal flow of the stripping vapor and flowable material across the plate surface;
- FIG. 3 is a diagrammatic view of the same form of heat exchanger plate shown in FIG. 2, showing a gasket arrangement enlisting all four ports in the plate to provide two inlet and two outlet ports in communication with the tortuous path;
- FIG. 4 is a diagrammatic view generally similar to FIGS. 2 and 3, showing a gasketing arrangement ineluding a single inlet port and two outlet ports;
- FIG. 5 is a diagrammatic view of another form of conventional liquid-liquid heat exchanger plate, depicting a gasketing arrangement enlisting three inlet ports and three outlet ports in the flow path;
- FIG. 6 is an exploded view portraying a plurality of stripping plates arranged to provide a tortuous path for passage of the vapor-material admixture, showing dual-dual flow of the admixture between and through the plates;
- FIG. 7 is a schematic illustration of a plate contactor including a series of sets of plates arranged in end-toend relation, showing representative paths traced by the vapor-material admixture as it flows through the contactor;
- FIG. 8 is a diagrammatic view of the six-port heat exchanger plate of FIG. 5, as gasketed to provide for single-single port flow of a heating fluid through alternate passageways of the plate assembly;
- FIG. 9 also depicts a six-port plate, as gasketed to provide dual-dual port flow of the flowable material through alternate passageways.
- FIG. 1 illustrates the basic organization of a two-phase system for stripping volatiles from a flowable material in accordance with the novel process of US. Pat. No. 3,469,617 in the practice of which the plate assembly of the present invention has particular application.
- the system includes a feed tank 10 for receiving a supply of flowable, volatilescontaining material through an inlet conduit 12 in an amount regulated by a control valve 14.
- a level control unit 16 is operatively connected between the tank 10 and the control valve 14 and functions to maintain the desired head of material in the tank 10 through appropriate regulation of the valve 14.
- the admixture of volatiles-containing material and stripping vapor is passed through a plate assembly 26, here in the form of a plate contactor, which presents a confined, tortuous path to the admixture flow, and in which the particles of flowable material are brought into intimate volatiles-transferring contact with the stripping vapor to effect stripping of the volatiles from the material.
- a plate assembly 26 here in the form of a plate contactor, which presents a confined, tortuous path to the admixture flow, and in which the particles of flowable material are brought into intimate volatiles-transferring contact with the stripping vapor to effect stripping of the volatiles from the material.
- the stripping vapor, now containing the volatiles, and the stripped material particles are passed through a connecting conduit 28 to a separator 30 where physical separation of the stripping vapor and volatiles from the material residue is carried out.
- the vaporous elements of the admixture are exhausted through a conduit 32 at the top of the separator and are passed to a condenser for recovery.
- the stripped material residue may be drawn off through a conduit 34 at the bottom of the separator 30 for further processing, if required, or for delivery to one or more successive stripping stages for more complete removal of volatiles from the material.
- the plate contactor 26 is constructed of one or more sets of port-type heat exchanger plates of conventional design arranged in succession, with the individual plates being separated by gaskets and retained in assembled relation by a suitable clamping structure 35.
- a series of elongated parallel passageways is thereby defined extending lengthwise of the plates in a direction lateral to the flow of the vapor and material admixture.
- FIG. 2 illustrates, in diagrammatic form, a liquidliquid heat exchanger plate 36 of conventional fourport design, and demonstrates the single-single gasketing arrangement commonly used with such plates ina liquid-liquid heat exchanger and that, heretofore, has been used as well in the plate contactor of U.S. Pat. No. 3,469,617.
- the plate is gasketed to enlist a single inlet port 38a adjacent one lower comer of the plate and a single outlet port 40b at the diagonally opposite upper end of the plate and to enclose with the adjacent plates a narrow, elongate passageway extending across the surface of the plates between the inlet port 38a and the outlet port 40b.
- the stripping vapor-material admixture enters through the port 38a, flows generally in the direction of the arrows across the plate to the outlet port 40b.
- the flow between the inlet and outlet ports is turbulent, with frequent collisions occurring between the particulate flowable material and the plate surfaces, to the end that the particles are further fragmented, hence bringing new material surfaces into contact with the stripping vapor and accelerating the removal of the volatiles.
- ports 38b and 40a of the plate 36 are not used, but typically are provided with ring gaskets 42 for proper plate support and for closing of the ports.
- a heating fluid may be circulated through the plate ports not enlisted in the tortuous path and, if so, the ring gaskets 42 are used to seal against loss of heating medium.
- a heating fluid may be circulated through the plate ports not enlisted in the tortuous path and, if so, the ring gaskets 42 are used to seal against loss of heating medium.
- generally U-shaped recesses 44 typically are provided in the heat exchanger plate 36 to receive elongate supporting rods (not shown) to hold the plates in proper assembled relation.
- FIG. 2 Although a plate contactor constructed in accordance with the foregoing and gasketed as illustrated in FIG. 2, affords good two-phase dispersed flow contactingof the stripping vapor and the flowable material, and accordingly provides efficient stripping of volatiles from the flowable material, it is subject to the abovedescribed limitations in respect of capacity and adaptability to the particular material being conveyed through the contactor. Notwithstanding this, it will be understood that the gasketing arrangement of FIG. 2 may be used to advantage in certain applications; indeed, as is more fully described hereinafter, it is a feature of the present invention that the single-single gasket configuration of FIG. 2 is usable in combination with other gasket configurations to allow desired regulation of flow conditions along the tortuous path.
- this invention overcomes the limitations associated with the earlier forms of plate contactor by enlisting one or more inlet ports, outlet ports, or both, in each plate in communication with the tortuous flow path, thereby increasing the cross-sectional flow area of port-formed conduits and of the flow areas leading from the inlet conduits to the plateinterspaces and from the plate interspaces to the outlet conduits. It is also contemplated that various gasketing configurations may be used within the contactor so as to vary the cross-sectional flow area provided in a way to create the desired flow conditions along the tortuous path.
- FIGS. 3, 4 and 5 there are illustrated in FIGS. 3, 4 and 5, three representative gasketing configurations that may be used in accordance with the invention.
- a conventional four-port heat exchanger plate 46 is shown gasketed to include both inlet ports 48a and 48b and both outlet ports 50a and 50b in communication with the elongate passageway extending across the plate surface (the stippling indicates the plate surface area enclosed by the gasket).
- the dual-dual arrangement it will be appreciated that flow of the stripping vapor-material admixture is admitted to the passageway through both of the inlet ports 48a and 48b and is exited from the passageway through the two outlet ports 50a and 50b (see the arrows in FIG.
- a plate contactor gasketed as illustrated in FIG. 3 would have twice the ultimate vapor flow capacity of a contactor gasketed according to FIG. 2, or, conversely, would at the same vapor rate reduce the velocity of flow of the admixture along the tortuous path by one-half.
- Intermediate throughputs and velocities are of course obtainable by appropriate regulation of the input to the plate contactor.
- FIG. 4 Another gasketing arrangement according to the invention is depicted in FIG. 4, where one inlet port 58a and two outlet ports 60a and 60b of a four-port, liquidliquid heat exchanger plate 56 are shown included in communication with the tortuous flow path. As illustrated by the arrows, the flow in this case would be through the single inlet port 58a, across the surface of the plate 56 and through the outlet ports 60a and 60b. While affording a throughput capacity less than the arrangement of FIG. 3, the single-dual gasketing arrangement of FIG. 4 provides increased capacity as compared to the arrangement of FIG. 2. Desirably, a ring gasket 62 is provided around the unused inlet port 58b to afford proper support for the plate 56 and to seal against loss of heating fluid if it is used.
- FIG. 5 Still another possible gasketing arrangement is shown in FIG. 5, this time with a conventional liquid-liquid heat exchanger plate 66 having three inlet ports 68a, 68b, and 68c, and three outlet ports 70a, 70b, and 700,
- FIG. 6 the manner of flow of the stripping vapor-material admixture through a plate contactor constructed in accordance with the invention is illustrated in connection with the-dualdual" gasketing configuration of FIG. 3.
- a multiplicity of port-type heat exchanger plates say, for example, plates 72, 74, 76, 78, and 80, are arranged in succession to form a single set and are adapted to be maintained-in close spaced relation by gaskets (not shown) interposed between adjacent plates so as to define a predetermined number of elongate, narrow passageways (indicated by the stippling in FIG. 6) extending laterally of the direction of flow to the contactor.
- the foremost plate 72 is provided with two inlet ports 72a and 72b for receiving the fiow of stripping vapor and flowable material from the injection device 22 (see FIG. 1).
- the conduit 24 leading to the contactor 26 is conveniently split in two downstream of the injection device 22 so as to deliver the vapor-material admixture to the plate 72 in two equal streams (as indicated by thearrows in FIG. 6).
- the plate 72 is a feeder-type plate and therefore will not have outlet ports adjacent its upper end.
- the admixture passes through the inlet ports 72a and 72b of the plate 72, with the main portions of the two inlet streams thereafter flowing through inlet conduits" 82a and 82b, respectively, formed by the successively positioned inlet ports 74a, 76a, and 78a and ports 74b, 76b, and 78b, respectively, while lesser amounts of the admixture are successively passed laterally through the elongate passageways between the plates as a plurality of individual turbulent streams.
- the flowable material is thus brought into intimate contact with the stripping vapor and the transfer of the volatiles contained by the material to the vapor is effected.
- the turbulent streams Upon reaching the upper end of the plate, the turbulent streams exit from the parallel passageways and enter the outlet conduits 84c and 84d formed by the successively arranged outlet ports 74c, 76c, 78c, and 800 and 74d, 76d, 78d, and d, respectively.
- the admixture of the stripped flowable material and the volatiles-containing vapor may be directed to a separator, such as that indicated as 30 in FIG. 1, for separation of the vaporous constituent elements from the material residue, or it may be received in a successive set or sets of plates, defining additional confined passageways, for further stripping of the volatiles from the flowable material.
- the foremost plate 72 of the set represented in FIG. 6 could be gasketed or formed to include only one inlet port. This would simplify the piping leading to the contactor and, in addition, would maintain a more uniform flow velocity through the contactor. It will be understood as well that the plates 72, 74, 76 and 78 could be gasketed in accordance with the configuration of FIGS. 2 or 4, or could take the form and have the gasket arrangement of FIG. 5.
- FIG. 7 illustrates schematically a contactor having a number of passes, i.e., sets of plates, arranged in series for successively receiving flow of the vapor-material admixture.
- the sets are assembled in end-to-end relation such that the outlet conduits 86b of the first set 86 of plates are positioned face-to-face with the inlet conduits 88a of the set 88 which next succeeds the set 86.
- the outlet conduits 88b of the set 88 are also in face-to-face relationship with the inlet conduits 90a of the next succeeding set 90, and so-forth until the last set of the contactor.
- the vapor-material admixture is therefore inter mittently changed in direction as it flows through the passageways defined by the respective sets of plates in the manner indicated by the arrows in FIG. 7.
- this intermittent changing of direction, together with high flow velocity creates sufficient turbulence within the material and stripping vapor flow so that particles of the flowable material are continuously brought into contact with the confining walls or surfaces of the plates with the result that volatilestransferring contact between the material and the vapor is enhanced. It will be appreciated that sufficient sets of plates, or passes, are provided in the contactor to effect the desired stripping of the volatiles from the material.
- the material enters through the inlet conduits 90a and is deflected upwardly through the lateral passageways to the outlet conduits 9012 where it exits from the contactor through the outlet ports of the last plate. Thereafter, the stripped material and volatilescontaining vapor are delivered to the separator 30 (see FIG. 1) or are received in a succeeding stripping stage for further removal of the volatiles from the material.
- One possible arrangement of a further stripping stage is depicted in FIG. 6 of U.S. Pat. No. 3,469,617.
- the gasketing of the plates may be varied among the sets of the contactor. That is to say, although all of the plates may be gasketed alike, for example, as in FIG. 3 to provide for dual-dual flow throughout the contactor, one or more of the sets may be provided with a different gasketing configuration.
- set 86 (see FIG. 7) could be provided with the single-dual configuration of FIG. 4, and each of the succeeding sets 88 and 90 could have the dual-dual gasketing arrangement of FIG. 3.
- set 86 could be provided with the single-single gasketing configuration of FIG.
- theforemost plate of the first set might be provided with the single-dual" gasketing arrangement (see FIG. 4) and the following sets may be provided with the dual-dual" gasketing arrangement (see FIG. 3).
- This porting sequence allows a high feed pressure with correspondingly lower throughput volumes and velocities, and thus permits good mass transfer of material through the contactor without unduly increasing flow velocity.
- all of the sets in the contactor could be gasketed to provide "dual-dual" flow.
- the overall flow pressure drop must be kept low to reduce the feed pressure and temperature and thus high feed volume must be accommodated.
- the dual-dual" gasket configuration has been found to be particularly useful for this purpose.
- EXAMPLE I In order to demonstrate the advantages obtained by using the plate assembly of the present invention as compared to the use of a contactor constructed to provide single-single port flow, two runs, each involving three separate passages of the flowable material through the contactor, were carried out in a system of the type illustrated in FIG -1n the first run, size 01 Rosenblads conventional porttype plates were provided with asbestos gaskets to provide a single inlet and outlet flow as illustrated in FIG. 2. These plates were arranged 101010-l0l0, (i.e., in parallel sets of 10 plates each, arranged in series to provide a five pass plate stripping unit). In the second run, the same size plates were gasketed for dual-dual flow as illustrated in FIG. 3 and were arranged 9999-9, (i.e., in sets of 9 parallel plates each, arranged in series to provide a 5 pass plate stripping unit).
- a carboxylated styrene-butadiene latex containing approximately 3 percent styrene monomer at a total solids content of from 41 to 42 percent was then stripped in three passages in the stripping systems utilizing the two different plate contactors. Both runs were conducted for 6.5 hours duration. Since pH is a particularly critical variable in the stability of this type of acid latex, during stripping the pH was held essentially constant during the two runs by adding ammonia (as ammonium hydroxide) between successive passages through each of the contactors to keep the product pH at 8.0 or higher.
- ammonia as ammonium hydroxide
- this invention provides a stripping technique for increasing the flow capacity of a given plate size in that the area between the plates can be considerably increased by simply adding plates in parallel up to a point where the greater port area becomes limiting.
- the invention may be advantageously applied to plate evaporators such as those described in US. Pat. No. 3,073,380 in which a heating fluid and the flowable material are passed through alternate passageways between the plates.
- FIG. 8 represents a plate gaskcted for single-single" port flow of heating fluid and FIG. 9 portrays "dual-dual port flow of flowable material.
- FIG. 8 therefore, one inlet port and one outlet port (e.g., the center ports 92b and 94b) of the three inlet ports 92a, 92b and 920 and three outlet ports 94a, 94b, and 940, respectively, of the plate 106 are included in communication with the passageway between the plates.
- a ring gasket 96 seals off inlet ports 92a and 92c and outlet ports Qa and Me so as to enclose those ports in the confined tortuous path for the flowable material, thus transmitting the material through the plate 106 to the next passageway. That passageway is coupled at one end to the inlet ports 92a and 92c and at the other to the outlet ports 94a and 940 by a suitably shaped gasket. (Again, the stippling indicates the enclosed plate area.) Middle ports 92b and 94b are encircled by ring gaskets 98, thereby including them in the flow path for the heating fluid.
- alternate passageways are included in the confined tortuous path for the flowable material, on the one hand, and in a confined flow path for the heating fluid, on the other.
- a plate assembly providing a confined tortuous path for two-phase stripping of volatiles from a flowable material comprising:
- the foremost plate and each interior plate having an inlet port in each corner at one end thereof and the last plate and each interior plate having an outlet port in each corner at the other end thereof;
- gasket means interposed between successive adjacent plates for enclosing in the confined tortuous path (1) at least one inlet port of the foremost and each interior plate, (2) both outlet ports of the last and each interior plate, and (3) each of said parallel passageways, said enclosed passageways being in flow communication with said enclosed inlet and outlet ports of the plates;
- said gasket means encloses both inlet ports of the foremost and each interior plate in the confined tortuous path, thereby forming two inlet conduits so as to afford dual-dual port flow of the stripping gas-flowable material mixture through the plates.
- the foremost plate and each interior plate have a third inlet port intermediate to said corner inlet ports, and the last plate and each interior plate have a third outlet port intermediate to said corner outlet ports;
- said gasket means also encloses in the confined tortuous path said third outlet port.
- a plate assembly according to claim 4 in which said gasket means encloses at least one additional inlet port of the foremost and each interior plate in said confined tortuous path, thereby forming at least two inlet conduits and three outlet conduits so as to afford dualtriple port flow through the plates.
- a plate assembly providing a confined tortuous path for two-phase stripping of volatiles from a flowable material comprising:
- the foremost plate and each interior plate of each set having an inlet port in each corner at one end thereof and the last plate and each interior plate of each set having an outlet port in each cornerat the other end thereof;
- gasket means in one set interposed between successive adjacent plates for enclosing in the confined tortuous path (1) at least one inlet port of the foremost and each interior plate, and both outlet ports in the last and each interior plate, gasket means in each set preceding said one set in the series for enclosing in the confined tortuous path as many inlet ports in the foremost and each interior plate and as many outlet ports in the last and each interior plate as there are enclosed inlet ports in said one set, gasket means in each set following said one set in the series for enclosing in the confined tortuous path as many inlet ports in the foremost and each interior plate and as many outlet ports in the last and each interior plate of each following set, as there are outlet ports in the last and each interior plate of said one set and, said gasket means in each set enclosing each of said parallel passageways between the plates of the sets in flow communication with said enclosed inlet and outlet ports of the plates; and
- each interior plate of each set have a third inlet port intermediate to said corner inlet ports and the last plate and .each interior plate of each set have a third outlet port intermediate to said corner outlet ports;
- said gasket means encloses at least two of the inlet ports of the foremost and each interior plate of said one set and all of the outlet ports of the last and each interior plate of said one set;
- a plate assembly according to claim 9 in which said gasket means comprises a continuous elongate gasket interposed between each pair of plates forming said enclosed passageways, the gasket extending in part along the peripheries of the pair of plates and enclosing said enclosed inlet and outlet ports thereof.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Description
Claims (10)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US4628370A | 1970-06-15 | 1970-06-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3759308A true US3759308A (en) | 1973-09-18 |
Family
ID=21942609
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00046283A Expired - Lifetime US3759308A (en) | 1970-06-15 | 1970-06-15 | Plate evaporator for removing volatiles from liquids |
Country Status (5)
Country | Link |
---|---|
US (1) | US3759308A (en) |
CA (1) | CA939294A (en) |
DE (1) | DE2129727C3 (en) |
FR (1) | FR2095247B1 (en) |
GB (1) | GB1337049A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4073340A (en) * | 1973-04-16 | 1978-02-14 | The Garrett Corporation | Formed plate type heat exchanger |
US4162703A (en) * | 1976-02-12 | 1979-07-31 | Aktiebolaget Atomenergi | Plate-type heat exchanger |
JPS56993A (en) * | 1979-06-13 | 1981-01-08 | Hisaka Works Ltd | Plate-type heat exchanger |
US4310960A (en) * | 1973-04-16 | 1982-01-19 | The Garrett Corporation | Method of fabrication of a formed plate, counterflow fluid heat exchanger and apparatus thereof |
US4511431A (en) * | 1982-06-04 | 1985-04-16 | White Consolidated Industries, Inc. | Process for evaporative stripping |
US4640740A (en) * | 1982-06-04 | 1987-02-03 | Blaw Knox Corporation | Apparatus for evaporative stripping |
US4683025A (en) * | 1986-02-10 | 1987-07-28 | The Graver Company | Method and apparatus to convert a long tube vertical evaporator to a falling film evaporator |
WO1994008678A1 (en) * | 1992-10-16 | 1994-04-28 | Superstill Technology, Inc. | Vapor compression distillation method and apparatus |
US5492171A (en) * | 1990-12-17 | 1996-02-20 | Alfa Laval Thermal Ab | Plate heat exchanger, a method of producing a plate heat exchanger and means for performing the method |
WO2001067021A1 (en) * | 2000-03-07 | 2001-09-13 | Alfa Laval Corporate Ab | Heat transfer plate and plate pack for use in a plate heat exchanger |
US6389696B1 (en) * | 1999-10-07 | 2002-05-21 | Xcellsis Gmbh | Plate heat exchanger and method of making same |
US20040226704A1 (en) * | 2002-08-26 | 2004-11-18 | Onda S.P.A. | Plate heat exchanger |
US9951995B2 (en) * | 2014-10-03 | 2018-04-24 | Dana Canada Corporation | Heat exchanger with self-retaining bypass seal |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9407504D0 (en) * | 1994-04-15 | 1994-06-08 | Crown Chemtech Ltd | Stripping of volatile substances from less volatile fluids |
WO2013007299A1 (en) * | 2011-07-13 | 2013-01-17 | Filtrox Ag | Filter layer for use in a layer filter and device for layer filtration |
DE102012107381B4 (en) * | 2012-08-10 | 2022-04-07 | Ttz Thermo Technik Zeesen Gmbh & Co. Kg | Plate heat exchangers, in particular for absorption refrigeration systems |
WO2015179318A1 (en) | 2014-05-18 | 2015-11-26 | Black & Decker Inc. | Power tool system |
-
1970
- 1970-06-15 US US00046283A patent/US3759308A/en not_active Expired - Lifetime
-
1971
- 1971-05-03 CA CA111,968A patent/CA939294A/en not_active Expired
- 1971-05-10 GB GB1403971*[A patent/GB1337049A/en not_active Expired
- 1971-05-14 FR FR7117617A patent/FR2095247B1/fr not_active Expired
- 1971-06-15 DE DE712129727A patent/DE2129727C3/en not_active Expired
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4073340A (en) * | 1973-04-16 | 1978-02-14 | The Garrett Corporation | Formed plate type heat exchanger |
US4310960A (en) * | 1973-04-16 | 1982-01-19 | The Garrett Corporation | Method of fabrication of a formed plate, counterflow fluid heat exchanger and apparatus thereof |
US4162703A (en) * | 1976-02-12 | 1979-07-31 | Aktiebolaget Atomenergi | Plate-type heat exchanger |
JPS56993A (en) * | 1979-06-13 | 1981-01-08 | Hisaka Works Ltd | Plate-type heat exchanger |
US4511431A (en) * | 1982-06-04 | 1985-04-16 | White Consolidated Industries, Inc. | Process for evaporative stripping |
US4640740A (en) * | 1982-06-04 | 1987-02-03 | Blaw Knox Corporation | Apparatus for evaporative stripping |
US4683025A (en) * | 1986-02-10 | 1987-07-28 | The Graver Company | Method and apparatus to convert a long tube vertical evaporator to a falling film evaporator |
US5492171A (en) * | 1990-12-17 | 1996-02-20 | Alfa Laval Thermal Ab | Plate heat exchanger, a method of producing a plate heat exchanger and means for performing the method |
WO1994008678A1 (en) * | 1992-10-16 | 1994-04-28 | Superstill Technology, Inc. | Vapor compression distillation method and apparatus |
US5597453A (en) * | 1992-10-16 | 1997-01-28 | Superstill Technology, Inc. | Apparatus and method for vapor compression distillation device |
US6389696B1 (en) * | 1999-10-07 | 2002-05-21 | Xcellsis Gmbh | Plate heat exchanger and method of making same |
WO2001067021A1 (en) * | 2000-03-07 | 2001-09-13 | Alfa Laval Corporate Ab | Heat transfer plate and plate pack for use in a plate heat exchanger |
US6823934B2 (en) | 2000-03-07 | 2004-11-30 | Alfa Laval Corporate Ab | Heat transfer plate and plate pack for use in a plate heat exchanger |
US20040226704A1 (en) * | 2002-08-26 | 2004-11-18 | Onda S.P.A. | Plate heat exchanger |
US9951995B2 (en) * | 2014-10-03 | 2018-04-24 | Dana Canada Corporation | Heat exchanger with self-retaining bypass seal |
Also Published As
Publication number | Publication date |
---|---|
FR2095247B1 (en) | 1976-12-03 |
DE2129727C3 (en) | 1979-03-08 |
GB1337049A (en) | 1973-11-14 |
CA939294A (en) | 1974-01-01 |
DE2129727A1 (en) | 1971-12-23 |
DE2129727B2 (en) | 1978-07-20 |
FR2095247A1 (en) | 1972-02-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: BLAW-KNOX COMPANY Free format text: MERGER;ASSIGNORS:AETNA-STANDARD ENGINEERING COMPANY;BLAW-KNOX CONSTRUCTION EQUIPMENT, INC.,;BLAW-KNOX EQUIPMENT, INC.;AND OTHERS;REEL/FRAME:003926/0382 Effective date: 19781221 Owner name: WHITE CONSOLIDATED INDUSTRIES, INC. Free format text: MERGER;ASSIGNORS:BLAW-KNOX COMPANY;KELVINATOR, INC.;WHITE-WESTINGHOUSE CORPORATION;AND OTHERS;REEL/FRAME:003926/0372 Effective date: 19781221 |
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STCF | Information on status: patent grant |
Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES) |
|
AS | Assignment |
Owner name: BLAW KNOX CORPORATION, ONE OLIVER PLAZA, PITTSBURG Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. EFFECTIVE SEPT. 27, 1985;ASSIGNOR:WHITE CONSOLIDATED INDUSTRIES, INC., A CORP OF DE.;REEL/FRAME:004532/0913 Effective date: 19851017 |