A system and a method for recovering waste heat from an industrial process in pre heating combustion air and fuel is provided. The present invention attains the above-described objective by a plurality of heat exchangers extracting heat from flue gas from a power plant and waste heat from an industrial process and transferring the extracted heat to air and optionally fuel entering said power plant.
F02C 6/00 - Ensembles fonctionnels multiples de turbines à gazCombinaisons d'ensembles fonctionnels de turbines à gaz avec d'autres appareilsAdaptations d'ensembles fonctionnels de turbines à gaz à des applications particulières
F02C 7/08 - Chauffage de l'air d'alimentation avant la combustion, p. ex. par les gaz d'échappement
F02C 7/224 - Chauffage du combustible avant son arrivée au brûleur
F02C 9/28 - Systèmes de régulation sensibles aux paramètres ambiants ou à ceux de l'ensemble fonctionnel, p. ex. à la température, à la pression, à la vitesse du rotor
A heat tube system for transferring heat at high temperatures across large heat tube areas is provided. The objective is achieved by a channel structure defined by texture or a network of grooves provided into a first surface wherein the first surface is attached to a second surface, wherein at least parts of the first surface not provided with channel structure form at least one contact surface that is in mechanical attachment to the second surface. The technical effect is that the contact surface makes it possible to create heat tube systems having large areas operating at high pressure while maintaining structural integrity.
F28D 15/02 - Appareils échangeurs de chaleur dans lesquels l'agent intermédiaire de transfert de chaleur en tubes fermés passe dans ou à travers les parois des canalisations dans lesquels l'agent se condense et s'évapore, p. ex. tubes caloporteurs
F28D 15/04 - Appareils échangeurs de chaleur dans lesquels l'agent intermédiaire de transfert de chaleur en tubes fermés passe dans ou à travers les parois des canalisations dans lesquels l'agent se condense et s'évapore, p. ex. tubes caloporteurs avec des tubes ayant une structure capillaire
3.
ALUMINIUM ELECTROLYSIS CELL COMPRISING SIDEWALL TEMPERATURE CONTROL SYSTEM
The invention provides method and system for cooling over a large area, suitable for use for control of layer formation over an extended area in an aluminium electrolysis cell and exploitation of heat. The objective is achieved by an assembly of a plurality of evaporation tubes connected together using a collecting manifold at the upper end and a distribution manifold at the lower end wherein the manifolds are also connected by a plurality of return lines, wherein a first return line is provided connecting a first end of the collecting manifold with the distribution manifold, and a second return line is provided connecting a second end of the collecting manifold at an opposite side of the first end of the collecting manifold with the distribution manifold.
C25C 3/08 - Construction des cellules, p. ex. fonds, parois, cathodes
C25C 3/06 - Production, récupération ou affinage électrolytique de métaux par électrolyse de bains fondus de l'aluminium
C25C 3/20 - Commande ou régulation automatique des cellules
F25D 17/00 - Dispositions pour la circulation des fluides de refroidissementDispositions pour la circulation de gaz, p. ex. d'air, dans les enceintes refroidies
F27D 1/12 - CarcassesGarnissagesParoisVoûtes comportant des dispositions de refroidissement
F27D 9/00 - Refroidissement des fours ou des charges s'y trouvant
4.
ALUMINIUM ELECTROLYSIS CELL COMPRISING SIDEWALL TEMPERATURE CONTROL SYSTEM
The invention provides method and system for cooling over a large area, suitable for use for control of layer formation over an extended area in an aluminium electrolysis cell and exploitation of heat. The objective is achieved by a manifold from which a plurality of hot end heat tubes extend, representing the hot end or ends, wherein the cold end or condenser can be provided inside the manifold or can extend outside the manifold.
And objective of the present invention is to provide an improved method and system for use for control of layer formation in an aluminium electrolysis cell and exploitation of the heat. The present invention attains the above-described objective by a reordering of the fundamental structure of a Hall-Héroult cell, providing two alternatives, eliminating the need for thermal insulation. In a first embodiment the ordering from the inside to the outside is: Electrolyte – sidelining – heat tubes – steel shell. In a second embodiment the ordering from the inside to the outside is: Electrolyte – sidelining – steel shell – heat tubes.
An objective of the present invention is to provide a method and system for use for control of layer formation over an extended area in an aluminium electrolysis cell and exploitation of heat. A second object of the invention is to provide a method and system for use for control of layer formation suited for retrofitting to an aluminium electrolysis cell and maintainability during operations of the cell. The present invention attains the above-described objectives by a flat heat tube for attachment to the steel casing of an aluminium electrolysis cell. This heat tube can be a heat pipe or a thermosyphon. Preferably the heat tube is provided with a substantially flat surface. Preferably the heat tube has a meandering shape.
F16K 17/168 - Soupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage ouvrant sur excès de pression d'un côtéSoupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage fermant sur insuffisance de pression d'un côté combinés avec des soupapes commandées à la main, p. ex. soupape à mécanisme de commande et soupape de sûreté combinées
F16K 17/14 - Soupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage ouvrant sur excès de pression d'un côtéSoupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage fermant sur insuffisance de pression d'un côté avec élément de rupture
8.
SYSTEM AND METHOD FOR CONTROL OF SIDE LAYER FORMATION IN AN ALUMINIUM ELECTROLYSIS CELL
brevets