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Tank bottom treatment is essential in the oil and gas industry to recover valuable hydrocarbons and minimize environmental impact. Effective cleaning and processing of tank bottoms ensure efficient oil recovery while reducing waste and disposal costs.
Tank bottoms refer to the residual sludges and sediments that accumulate at the bottom of storage tanks used in the oil and gas industry. These sludges contain a high percentage of recoverable oil, making them valuable products. However, they are known for being difficult to handle due to their high solids and emulsion content as well as their high viscosity.
Proper treatment of tank bottoms is crucial not only for recovering valuable hydrocarbons but also for minimizing environmental impact and reducing waste disposal costs. Untreated tank bottom sludge, which can contain 10-70% oil, 30-90% water and 5-20% solids, poses significant challenges due to its composition. If not treated on-site, this sludge must be either incinerated or transported to specialized treatment plants, both of which are costly and environmentally hazardous.
GEA offers an advanced portfolio of separation technologies designed to effectively treat tank bottoms. Separator and decanter centrifuges provide an efficient solution for processing tank bottom sludge. These technologies are engineered to handle the complex composition of slop oils, which can have oil viscosities reaching up to 600 cSt at 50°C and specific gravity ranging from 0.8 to 0.96 g/ml. Additionally, GEA equipment is built to withstand the challenges posed by low pH values, high chloride concentrations, abrasive particles, organic solids and the presence of asphaltenes.
GEA has developed a method to recycle oils from tank bottom sludge in an environmentally friendly manner, offering significant advantages to customers. The combined mechanical separation technology, used in several stages along with heating and chemical enhancements, enables the recovery of 80-95% of salable hydrocarbons. This not only adds value by recovering hydrocarbons that would otherwise be lost but also significantly reduces the total disposal costs. By integrating GEA separator and decanter centrifuges into the treatment process, oil companies can efficiently process tank bottom sludge, turning a challenging waste product into a valuable resource while minimizing environmental impact.
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Le décanteur est appelé à intervenir dès que la teneur en matières solides dans la suspension à traiter atteint un niveau particulièrement élevé. Ces machines offrent l'avantage d'un rendement de clarification élevé et d'une déshydratation optimale, et assurent en outre la séparation des liquides tout en éliminant les matières soli...
Les séparateurs de GEA sont conçus pour les applications à base de liquides. S'appuyant sur la force centrifuge, ils sont utilisés pour séparer les suspensions comprenant au moins deux phases de densités différentes. Ils peuvent donc être utilisés pour la séparation liquide-liquide, la séparation liquide-liquide-solide ou la séparation liqui...
For feedstock material that can be efficiently processed through dewatering and simultaneous oil and water separation, GEA's 3-phase single-stage decanter centrifuges are the preferred solution. These centrifuges can handle high solid content achieving maximum dewatering and clarification in one stage, making them ideal for easier slop oil treatment requirements.
Single-stage treatment with 3-phase decanter centrifuge
In cases where the feedstock is more challenging to treat or higher oil quality is required, GEA's double-stage treatment process becomes more viable. This involves using 2-phase decanter centrifuges followed by high-speed disk stack centrifuges. The disk stack machines process the decanter centrate phase, separating ultra-fine particles and maximizing water removal. This results in a high-quality oil product that can be merchandized similarly to crude oil.
Double-stage treatment with 2-phase decanter centrifuges and disk stack centrifuges
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Lorsque le producteur de denrées alimentaires à base végétale sud-coréen Pulmuone a mis GEA au défi de moderniser ses nouilles froides traditionnelles, les « naengmyeon », les spécialistes R&D de GEA ont saisi la balle au bond. Ils ont aidé l’entreprise à développer un plat, qui est aujourd’hui une vraie réussite commerciale et dont la production consomme moins d’eau et d’électricité que les méthodes qui existaient auparavant. Le résultat est, par ailleurs, fidèle aux origines traditionnelles de ce plat et aux racines de Pulmuone, qui sont la santé, le bien-être et le développement durable.