FR2969929A1 - Equipment for transfer of energy at an still functioning under pressure towards a still functioning under vacuum, comprises an exchanger that constitutes single heating mode of the vacuum, two deflectors, and a vacuum control device - Google Patents

Equipment for transfer of energy at an still functioning under pressure towards a still functioning under vacuum, comprises an exchanger that constitutes single heating mode of the vacuum, two deflectors, and a vacuum control device Download PDF

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FR2969929A1
FR2969929A1 FR1005197A FR1005197A FR2969929A1 FR 2969929 A1 FR2969929 A1 FR 2969929A1 FR 1005197 A FR1005197 A FR 1005197A FR 1005197 A FR1005197 A FR 1005197A FR 2969929 A1 FR2969929 A1 FR 2969929A1
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still
vacuum
still functioning
functioning under
boiler
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FR2969929B1 (en
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Pierre Olivier Cognat
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D3/00Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/001Processes specially adapted for distillation or rectification of fermented solutions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D3/00Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/001Processes specially adapted for distillation or rectification of fermented solutions
    • B01D3/003Rectification of spirit
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D3/00Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/02Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in boilers or stills
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D3/00Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/10Vacuum distillation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D3/00Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/14Fractional distillation or use of a fractionation or rectification column
    • B01D3/143Fractional distillation or use of a fractionation or rectification column by two or more of a fractionation, separation or rectification step
    • B01D3/146Multiple effect distillation

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

The simplified equipment comprises an exchanger (F1) that constitutes single heating mode of the still functioning under vacuum (A1V) by feeding heating fluid by hydro-alcoholic steam emitted by still functioning under pressure (A1P) or by steam of boiler, two deflectors placed laterally to a tubular bundle, and a device for controlling the vacuum by calibrated valve that is placed upstream of the vacuum pump. The tubular bundle is fed with hydro-alcoholic steam emitted by A1P, or with steam of boiler by a network of pipes and valves defining the bypass. The simplified equipment comprises an exchanger (F1) that constitutes single heating mode of the still functioning under vacuum (A1V) by feeding heating fluid by hydro-alcoholic steam emitted by still functioning under pressure (A1P) or by steam of boiler, two deflectors placed laterally to a tubular bundle, and a device for controlling the vacuum by calibrated valve that is placed upstream of the vacuum pump. The tubular bundle is fed with hydro-alcoholic steam emitted by A1P, or with steam of boiler by a network of pipes and valves defining the bypass. A pump (Pc) ensures the extraction and the return of condensates towards still A1P or to the boiler by networks of pipes. The deflectors are placed on two sides of the tubular bundle and are positioned along the bundle to create a chimney. The tubular bundle is divided into several units operating at the same time. The control of vacuum is provided by depression safety valves. The calibrated pressure of each valve is expressed in bar absolute, and decreases with increasing the diameter of the valve when more valves are installed. An independent claim is included for a process for transfer of energy at a still functioning under pressure towards a still functioning under vacuum.

Description

La Demande de Brevet d'Invention FR2933309 Al, conformément à la FIGURE 1, définit un appareillage pour transférer l'énergie disponible au niveau d'un alambic fonctionnant à pression vers un alambic fonctionnant sous vide L'objet de la présente invention est double et constitue un perfectionnement à 5 cette précédente demande de brevet, à savoir -réduire l'importance des matériels installés, -fiabiliser le fonctionnement de l'installation, notamment en cas de redémarrage après une coupure d'électricité, tout en maintenant la même polyvalence d'utilisation de l'appareillage dans sa 10 conception initiale. L'appareillage simplifié, objet de l'invention, effectuant le transfert de l'énergie disponible au niveau d'un alambic fonctionnant à pression « Al P » vers un alambic fonctionnant sous vide « Al V » est caractérisé en ce que, conformément à la FIGURE 2 15 l'échangeur F1 constitue le mode de chauffage unique de l'Alambic sous Vide «AlV», -le faisceau tubulaire F 1 reçoit soit les vapeurs hydro-alcooliques émises par « AI P », soit la vapeur de chaufferie, -deux déflecteurs sont placés latéralement au faisceau tubulaire F1, 20 le contrôle du vide se fait au moyen de soupapes tarées placées en amont de la pompe à vide. L'échangeur d'appoint F2, qui faisait partie de l'appareillage initial, est supprimé et remplacé dans sa fonction de chauffage en fin de cycle de l'alambic « AIV » par l'échangeur principal F 1, maintenu en fonctionnement. 25 Cette disposition présente deux avantages. L'investissement est notablement réduit car l'échangeur F2 et ses réseaux de liaison représentaient une partie importante des matériels installés. La poursuite de la chauffe sur l'alambic à pression garantit l'élimination totale du composé volatil. L'inconvénient pourrait résider dans un retard des opérations de vidange et de 30 réchauffage du vin par les vinasses extraites, sur les 2 alambics. Cet inconvénient peut-être notablement réduit si on prend la précaution de sur-dimensionner les pompes de transfert et l'échangeur Evv et de commencer la chauffe de l'alambic à pression «Al P » sans attendre la fin du remplissage de l'alambic sous vide «AI V ». Au final la suppression de l'échangeur F2 se révèle très positive. 35 Le Distillateur dans la version initiale, décrite sur la FIGURE 1, pouvait ne pas mettre en oeuvre le dispositif d'économie d'énergie constitué par le « double effet » de l'alambic à pression chauffant l'alambic sous vide, en assurant le chauffage pendant la durée totale du cycle par l'intermédiaire de l'échangeur F2, ceci pour obtenir des alcoolats ayant exactement les mêmes caractéristiques sur les deux alambics ou pour 40 pallier à une défaillance du dispositif de vide. 296.9929 La présente invention conserve la même polyvalence de l'appareillage proposé. En effet le faisceau tubulaire FI est alimenté soit avec les vapeurs hydro-alcooliques émises par «Al P », soit avec de la vapeur de chaufferie, par l'intermédiaire d'un réseau de tuyauteries et de vannes définissant des by-pass, la pompe Pc assurant l'extraction et , le retour des condensats soit vers l'Alambic « Al P » soit vers la chaufferie par l'intermédiaires de réseaux de tuyauteries adaptés. Le Distillateur, s'il abandonne le bénéfice de l'économie d'énergie, peut faire fonctionner les deux alambics en parallèle de manière totalement identique, le chauffage de chaque alambic étant assuré par la vapeur de chaufferie. Patent Application FR2933309 A1, according to FIGURE 1, defines an apparatus for transferring the available energy at a still operating at a pressure to a still operating under a vacuum. The object of the present invention is two-fold and is an improvement to this previous patent application, namely -reducing the importance of installed equipment, -fabilize the operation of the installation, especially in case of restart after a power cut, while maintaining the same versatility d use of the apparatus in its initial design. The simplified apparatus, object of the invention, making the transfer of the available energy at a still operating at "Al P" pressure to a still operating under vacuum "Al V" is characterized in that, in accordance with FIG. 2, the exchanger F1 constitutes the single heating mode of the Vacuum Alambic "AlV", the tubular bundle F 1 receives either the hydro-alcoholic vapors emitted by "AI P" or the boiler steam, two deflectors are placed laterally to the tubular bundle F1, the vacuum control is carried out by means of calibrated valves placed upstream of the vacuum pump. The auxiliary exchanger F2, which was part of the initial apparatus, is removed and replaced in its heating function at the end of the cycle of the still "AIV" by the main heat exchanger F 1, maintained in operation. This arrangement has two advantages. The investment is significantly reduced because the F2 interchange and its link networks represented a significant part of the equipment installed. Continued heating on the pressure still ensures complete removal of the volatile compound. The disadvantage could lie in a delay in the operations of emptying and reheating of the wine by the extracted vinasse, on the 2 stills. This disadvantage can be significantly reduced if one takes the precaution of over-sizing the transfer pumps and the exchanger Evv and start heating the pressure still "Al P" without waiting for the end of the filling of the still under vacuum "AI V". In the end the removal of the exchanger F2 is very positive. The distiller in the initial version, described in FIG. 1, could not implement the energy saving device constituted by the "double effect" of the pressure still still heating the vacuum still, ensuring heating for the entire cycle through the exchanger F2, this to obtain alcoholates having exactly the same characteristics on both stills or to overcome a failure of the vacuum device. The present invention retains the same versatility of the proposed apparatus. In fact the tubular bundle FI is fed either with the hydro-alcoholic vapors emitted by "Al P", or with boiler steam, via a network of pipes and valves defining by-pass, the Pc pump ensuring the extraction and the return of the condensates either to Al "Al P" or to the boiler via suitable pipe networks. The Distiller, if he abandons the benefit of energy saving, can operate the two stills in parallel in a completely identical way, the heating of each still being provided by the boiler steam.

L'appareillage selon l'invention, comporte des déflecteurs placés des 2 côtés du faisceau tubulaire Fi et positionnés tout le long dudit faisceau pour créer une cheminée. Ce dispositif, qui canalise le mouvement ascensionnel de la vapeur émise à l'extérieur de l'échangeur F1, permet de mieux réaliser la circulation à contre-courant entre la vapeur qui gagne la partie supérieure de l'alambic et le liquide, transféré par la pompe Pr, qui descend jusqu'à la partie inférieure de l'alambic. Ce contre-courant définit un équivalent de plateau (pratique) de distillation qui améliore la séparation du composé volatil et donc la performance globale de l'installation. Une autre caractéristique de l'invention est que le faisceau tubulaire F1 peut être divisé en plusieurs unités fonctionnant en parallèle, de même conception, équipées 20 chacune de déflecteurs latéraux assurant la même fonction. Cette disposition permet de conserver la même géométrie traditionnelle pour l'alambic à pression et pour l'alambic sous vide. La forme de la chaudière d'un alambic charentais, par exemple, ne permet pas de positionner l'échangeur FI et son dispositif de répartition de liquide aussi facilement que sur une chaudière ayant une forme de cylindre 25 horizontal. Le fait de pouvoir scinder le faisceau F 1 en plusieurs unités répond à ce besoin de conserver la forme traditionnelle d'une chaudière, besoin qui pourrait être imposé par l'exploitant. Toujours selon l'invention le contrôle du vide au niveau de l'alambic sous vide est assuré par une ou plusieurs soupapes de sécurité à dépression.The apparatus according to the invention comprises deflectors placed on both sides of the tubular bundle Fi and positioned along said bundle to create a chimney. This device, which channels the upward movement of the vapor emitted outside the exchanger F1, makes it possible to better achieve countercurrent circulation between the vapor that reaches the upper part of the still and the liquid, transferred by the pump Pr, which goes down to the lower part of the still. This countercurrent defines a (practical) distillation plateau equivalent which improves the separation of the volatile compound and thus the overall performance of the plant. Another feature of the invention is that the tubular bundle F1 can be divided into several units operating in parallel, of the same design, each equipped with side baffles providing the same function. This arrangement preserves the same traditional geometry for the pressure still and the vacuum still. The boiler shape of a Charentais still, for example, does not make it possible to position the IF exchanger and its liquid distribution device as easily as on a boiler having a horizontal cylinder shape. The fact of being able to split the beam F 1 into several units meets this need to preserve the traditional form of a boiler, a need that could be imposed by the operator. Still according to the invention the vacuum control at the vacuum still is provided by one or more vacuum safety valves.

30 Lors de l'exploitation de l'appareillage précédent, décrit sur la FIGURE1, une difficulté est apparue pour rétablir le fonctionnement et la stabilité de l'alambic sous vide, à la suite d'une coupure d'électricité. En effet une mise sous vide trop rapide au-delà du point de consigne, pilotée par une chaîne de régulation classique, crée une vaporisation trop importante de la charge qui crée une émulsion perturbant l'extraction du composé 35 volatil. La mise en place de soupapes de sécurité résout cette difficulté. Un mode de réalisation des soupapes, s'il y en a plusieurs, est caractérisé en ce que la pression de tarage de chaque soupape, exprimée en bar absolu, est voisine et diminue avec l'augmentation du diamètre de la soupape concernée. Le procédé pour la mise en oeuvre de l'appareillage simplifié, ainsi défini, est 40 caractérisé en ce qu'il comporte les séquences suivantes - le vin alimentant l'alambic « Al P » est réchauffé par la vinasse extraite de l'alambic « Al P » et la charge est mise en chauffe, - le vin alimentant l'alambic « Al V » est réchauffé par la vinasse extraite de l'alambic « Al V » et la pompe de circulation Pr est mise en service dès qu'un niveau minimum 45 de charge en vin est atteint, -le flux calorifique disponible en tête de l'alambic sous pression « Al P » est intégralement transmis à l'alambic sous vide « AI V » pour assurer son chauffage, alors que la fin de cycle de l'alambic à pression « Al P » est atteinte, la chauffe de cet alambic « Al P » se poursuit pour assurer la fin de cycle de l'alambic sous vide « Al V », l'alambic « Al P » fonctionnant alors « à reflux total ». Ces séquences de fonctionnement permettent d'assurer les cycles de distillation complets pour chaque alambic tout en supprimant les phases d'attente intermédiaires qui pourraient réduire la cadence ou la performance énergétique de l'ensemble. Une autre manière d'assurer le procédé de fabrication est caractérisée en ce que les 2 alambics « Al P » et « Al V » peuvent travailler de manière indépendante, chacun à pression, l'échangeur FI de l'alambic « Al V » étant alors alimenté par de la vapeur 10 de chaufferie pour assurer le chauffage dudit alambic. L'installation de réseaux, décrite précédemment, permet ce mode de fonctionnement. In operating the above apparatus, described in FIGURE 1, a difficulty has arisen in restoring the operation and stability of the still still under vacuum as a result of a power failure. Indeed a vacuum setting too fast beyond the set point, driven by a conventional control chain, creates a too high vaporization of the charge which creates an emulsion disrupting the extraction of the volatile compound. The installation of safety valves solves this difficulty. An embodiment of the valves, if there are several, is characterized in that the calibration pressure of each valve, expressed in absolute bar, is close and decreases with increasing the diameter of the valve concerned. The process for the implementation of the simplified apparatus, thus defined, is characterized in that it comprises the following sequences - the wine supplying the still "Al P" is heated by the vinasse extracted from the still " Al P "and the load is warmed up, - the wine feeding the still" Al V "is heated by the vinasse extracted from the still" Al V "and the circulation pump Pr is put in service as soon as a minimum level 45 of wine load is reached, -the heat flow available at the top of the pressurized alembic "Al P" is fully transmitted to the vacuum still "AI V" to ensure its heating, while the end of cycle of the pressure still "Al P" is reached, the heating of this still "Al P" continues to ensure the end of cycle of the vacuum still "Al V", the still "Al P" still working then "at total reflux". These operating sequences make it possible to ensure complete distillation cycles for each still while eliminating the intermediate waiting phases that could reduce the rate or the energy performance of the whole. Another way to ensure the manufacturing process is characterized in that the two stills "Al P" and "Al V" can work independently, each pressure, the IF exchanger of the still "Al V" being then fed with boiler steam to provide heating of said still. The installation of networks, described above, allows this mode of operation.

Claims (1)

REVENDICATIONS1.-Appareillage simplifie effectuant le transfert de l'énergie disponible au niveau d'un alambic fonctionnant à pression « Al P » vers un alambic fonctionnant sous vide « Al V » caractérisé en ce que, l'Alambic sous Vide « AlV » comporte - l'échangeur FI qui constitue le mode de chauffage unique de cet Alambic sous Vide « Al V » en étant_alimente en fluide chauffant, soit par les vapeurs hydro-alcooliques émises par « Al P », soit par la vapeur de chaufferie, -deux déflecteurs placés latéralement au faisceau tubulaire Fi, un dispositif de contrôle du vide au moyen de soupapes tarées placées en amont de la pompe à vide. CLAIMS1.-Simplified apparatus performing the transfer of available energy at a still operating at "Al P" pressure to a still operating vacuum "Al V" characterized in that the Vacuum Alembic "AlV" comprises the heat exchanger FI, which constitutes the single heating mode of this "Al V" vacuum still, being fed with heating fluid, either by the hydro-alcoholic vapors emitted by "Al P", or by the steam of the boiler, -two deflectors placed laterally to the tube bundle Fi, a vacuum control device by means of calibrated valves placed upstream of the vacuum pump. 2.- Appareillage selon la Revendication 1, caractérisé en ce que le faisceau tubulaire FI est alimenté soit avec les vapeurs hydro-alcooliques émises par « Al P », soit avec de la vapeur de chaufferie, par l'intermédiaire d'un réseau de tuyauteries et de vannes définissant des by-pass, la pompe Pc assurant l'extraction et le retour des condensats soit vers l'Alambic « Al P » soit vers la chaufferie par l'intermédiaires de réseaux de tuyauteries adaptés. 2. Apparatus according to Claim 1, characterized in that the tubular bundle FI is fed either with the hydro-alcoholic vapors emitted by "Al P", or with boiler steam, via a network of pipes and valves defining by-pass, the Pc pump ensuring the extraction and return of the condensates either to the Al "Al P" or to the boiler via suitable pipe networks. 3.- Appareillage selon la Revendication 1, caractérisé en ce que les déflecteurs placés des 2 côtés du faisceau tubulaire F1, sont positionnés tout le long dudit faisceau pour créer une cheminée. 3. Apparatus according to claim 1, characterized in that the deflectors placed on both sides of the tubular bundle F1, are positioned along the length of said bundle to create a chimney. 4.- Appareillage selon les Revendications 1, 2 et 3, caractérisé en ce que le faisceau tubulaire FI peut être divisé en plusieurs unités fonctionnant en parallèle, de même conception, équipées chacune de déflecteurs latéraux assurant la même fonction. 4. Apparatus according to Claims 1, 2 and 3, characterized in that the tubular bundle IF can be divided into several units operating in parallel, of the same design, each equipped with side baffles providing the same function. 5.- Appareillage selon la Revendication 1, caractérisé en ce que le contrôle du vide au niveau de l'alambic sous vide est assuré par une ou plusieurs soupapes de sécurité a dépression. 5. Apparatus according to claim 1, characterized in that the vacuum control at the vacuum still is provided by one or more vacuum safety valves. 6.- Appareillage selon les Revendications 1 et 5, caractérisé en ce que la pression de tarage de chaque soupape, exprimée en bar absolu, est voisine et diminue avec l'augmentation du diamètre de la soupape concernée quand plusieurs soupapes sont installées. 6. Apparatus according to Claims 1 and 5, characterized in that the set pressure of each valve, expressed in absolute bar, is close and decreases with increasing the diameter of the valve concerned when several valves are installed. 7.- Procédé pour la mise en oeuvre de l'appareillage défini selon les Revendications 1 à 6, caractérisé en ce qu'il comporte les séquences suivantes : -le vin alimentant l'alambic « Al P » est réchauffé par la vinasse extraite de l'alambic « Al P » et la charge est mise en chauffe, -le vin alimentant l'alambic « Al V » est réchauffé par la vinasse extraite de l'alambic « Al V » et la pompe de circulation Pr est mise en service dés qu'un niveau minimum 35 de charge en vin est atteint, -le flux calorifique disponible en tête de l'alambic sous pression « Al P » est intégralement transmis à l'alambic sous vide « Al Ni » pour assurer son chauffage, -alors que la fin de cycle de l'alambic à pression « Al P » est atteinte, la chauffe de cet alambic « Al P » se poursuit pour assurer la fin de cycle de l'alambic sous vide « Al 40 V », l'alambic « AI P » fonctionnant alors « à reflux total ». 8: Procédé pour la mise en oeuvre de l'appareillage selon l'une quelconque des revendications 1 à 6 caractérisé en ce que les 2 alambics « Al P » et « Al V » peuvent travailler de manière indépendante, chacun à pression, l'échangeur F1 de l'alambic « Al V » étant alors alimenté par de la vapeur de chaufferie pour assurer le chauffage 45 dudit alambic. 7. A process for the implementation of the apparatus defined according to claims 1 to 6, characterized in that it comprises the following sequences: the wine feeding the still "Al P" is heated by the vinasse extracted from the still "Al P" and the load is heated, -the wine supplying the still "Al V" is heated by the vinasse extracted from the still "Al V" and the circulation pump Pr is put into service as soon as a minimum level of wine charge is reached, the heat flow available at the top of the pressurized still "Al P" is entirely transmitted to the vacuum still "Al Ni" to ensure its heating; while the end of the cycle of the alembic still "Al P" is reached, the heating of this still "Al P" continues to ensure the end of cycle of the vacuum still "Al 40 V", the still "AI P" then operating "at total reflux". 8: A method for implementing the apparatus according to any one of claims 1 to 6 characterized in that the two stills "Al P" and "Al V" can work independently, each pressure, the F1 exchanger of the still "Al V" then being fed with boiler steam to provide heating 45 said still.
FR1005197A 2010-12-29 2010-12-29 SIMPLIFIED APPARATUS FOR TRANSFERRING AVAILABLE ENERGY AT A PRESSURE OPERATING ALAMBIC TO A VACUUM OPERATING ALAMBIC. METHODS FOR IMPLEMENTING Expired - Fee Related FR2969929B1 (en)

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FR1005197A FR2969929B1 (en) 2010-12-29 2010-12-29 SIMPLIFIED APPARATUS FOR TRANSFERRING AVAILABLE ENERGY AT A PRESSURE OPERATING ALAMBIC TO A VACUUM OPERATING ALAMBIC. METHODS FOR IMPLEMENTING
TR2011/12576A TR201112576A2 (en) 2010-12-29 2011-12-19 A Simplified Equipment for Transferring Energy from a Pressure-Operated Retort to an Idle Retort. Processes to do this

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FR1005197A FR2969929B1 (en) 2010-12-29 2010-12-29 SIMPLIFIED APPARATUS FOR TRANSFERRING AVAILABLE ENERGY AT A PRESSURE OPERATING ALAMBIC TO A VACUUM OPERATING ALAMBIC. METHODS FOR IMPLEMENTING

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FR2969929B1 FR2969929B1 (en) 2014-09-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105327519A (en) * 2015-11-30 2016-02-17 肥城金塔酒精化工设备有限公司 Triple-effect solvent recovering energy-saving distilling method and device for recovering solvent

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US2302993A (en) * 1940-12-07 1942-11-24 Lummus Co Evaporator
FR917263A (en) * 1941-12-17 1946-12-31 Standard Alcohol Co Purification of organic liquids
GB760580A (en) * 1952-05-23 1956-11-07 Barbet Ets Improvements in the distillation and rectification of alcohols
GB1319552A (en) * 1970-02-10 1973-06-06 Aerojet General Co Preheaters
FR2505358A3 (en) * 1981-05-07 1982-11-12 Equip Ind Chimiques Anhydrous ethanol recovery from fermentation liq. - by distn. in series of columns at different pressures
FR2933309A1 (en) * 2008-07-01 2010-01-08 Pierre Olivier Cogat Apparatus for transferring energy available at still operating with pressure towards still running on empty, comprises set of materials transferring vaporization energy from pressure still towards empty still and comprising first condenser

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2302993A (en) * 1940-12-07 1942-11-24 Lummus Co Evaporator
FR917263A (en) * 1941-12-17 1946-12-31 Standard Alcohol Co Purification of organic liquids
GB760580A (en) * 1952-05-23 1956-11-07 Barbet Ets Improvements in the distillation and rectification of alcohols
GB1319552A (en) * 1970-02-10 1973-06-06 Aerojet General Co Preheaters
FR2505358A3 (en) * 1981-05-07 1982-11-12 Equip Ind Chimiques Anhydrous ethanol recovery from fermentation liq. - by distn. in series of columns at different pressures
FR2933309A1 (en) * 2008-07-01 2010-01-08 Pierre Olivier Cogat Apparatus for transferring energy available at still operating with pressure towards still running on empty, comprises set of materials transferring vaporization energy from pressure still towards empty still and comprising first condenser

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105327519A (en) * 2015-11-30 2016-02-17 肥城金塔酒精化工设备有限公司 Triple-effect solvent recovering energy-saving distilling method and device for recovering solvent
CN105327519B (en) * 2015-11-30 2017-03-22 肥城金塔酒精化工设备有限公司 Triple-effect solvent recovering energy-saving distilling method and device for recovering solvent

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