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Method for removing water and impurities from crude oil contg. water and impurities

A technology for removing water and dehydrating crude oil, which is applied in the fields of mechanical dehydration/demulsification, petroleum industry, hydrocarbon oil dehydration/demulsification, etc., and can solve the problems of reducing the degree of commercial value of heavy oil

Inactive Publication Date: 2006-04-19
WORLEYPARSONS CANADA SERVICES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These unwanted components continue to create problems in pipeline transportation systems and refinery facilities to the point of reducing the commercial value of heavy oil

Method used

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  • Method for removing water and impurities from crude oil contg. water and impurities
  • Method for removing water and impurities from crude oil contg. water and impurities
  • Method for removing water and impurities from crude oil contg. water and impurities

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Embodiment Construction

[0055] Such as figure 1 Shown is a heavy oil 10 with a viscosity between 7° API and 20° API, which typically contains crude oil, water, oil / water emulsions, dissolved substances such as chlorides and solid particles such as clays, metals and silicas. Crude oil is injected into a gravity separator, heated or non-heated processor 12 at a pressure ranging from atmospheric pressure to 100 psig. Typically, heated processors operate at 170°F-285°F (77°C-141°C). In this processor, solid particles and most of the slightly alkaline water are separated from the crude oil and discharged through 14. After preliminary treatment, the water fraction in the crude crude oil 18 flowing out from the valve element 20 is less than 10% (volume), especially less than 5% (volume). Water stream 22 typically contains dissolved matter such as sodium chloride (5,000-50,000 ppm (wt)) and silica, and suspended matter such as clay and sand.

[0056] Crude crude oil with a water fraction of about 5% (free...

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Abstract

A process for removing water and impurities from the crude features that at least part of dewatered crude is circulated back into dewatering equipment, which contains the heated and dewatered crude. The temp of crude surface or the region near the surface must be high enough to evapourize the water in contact with said surface. In order to obtain high dewatering efficiency, uniform temp field in the crude must be kept. Its advantages are less bubbling, and smooth and efficient dewatering.

Description

technical field [0001] The present invention relates to an improved crude oil dehydration method and equipment, in particular, the present invention relates to a crude oil dehydration method that can solve the problem of instability in the prior art when dealing with heavy oil streams with high water content, and provides improved thermal energy input and recovery methods , and can remove suspended solids and insoluble components from the feed. Background technique [0002] In many parts of the world, heavy oil as a hydrocarbon material has higher viscosity and lower API gravity (less than 20°API, typically 7°-12°API) compared to traditional crude oil. The heavy oil is recycled and sold. During the recovery process and before being shipped to the refinery for upgrading, the heavy oil is first dewatered and solids removed, generally resulting in an alkaline precipitate and water (BS&W) content of less than 0.5% by volume and a chloride content of less th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G33/06C10G33/00
CPCC10G33/00
Inventor 斯蒂弗·克雷什尼亚克费雷德·肖
Owner WORLEYPARSONS CANADA SERVICES LTD