A water removal device for atmospheric and vacuum in petroleum refining

Abstract

The invention relates to a dewatering device for petroleum refining under atmospheric pressure. The technical solution is: the two ends of the central screen are respectively equipped with connecting flanges for connecting with the main oil supply line; the middle of the central screen is provided with a water-absorbing screen; the outer side of the central screen is fixed with a power cylinder liner , The power cylinder liner is provided with a liquid inlet hole and a liquid discharge hole, and the cavity formed between the power cylinder liner and the central screen is installed with a water storage expansion rubber, a rubber bearing frame, a water absorption expansion rubber and a pressurized piston. The beneficial effect is: firstly, the flowing crude oil liquid forms an annular overflow channel, and then, a water-absorbing swelling rubber is provided on the outside of the annular overflow channel, and continuous water absorption is realized through a mechanical method, while an inner cavity of the annular overflow channel is provided with With oil-absorbing swelling rubber, continuous oil absorption can also be achieved mechanically. In this way, the crude oil passing through the water eliminator can be dehydrated first, which reduces the pressure of subsequent dehydration, and the water content is controlled at <0.5%.

Description

technical field [0001] The invention relates to a petroleum dewatering device and method, in particular to a dewatering device for petroleum refining under atmospheric pressure. Background technique [0002] In the refining process of petroleum, the crude oil extracted from the strata contains various mechanical impurities C 2 Light hydrocarbon gas, water and NaCl, MgCl 2 , CaCl 2 Crude oils such as inorganic salts are first processed by the dehydration device in the oil field, and the water content is required to be reduced to <0.5%, and the salt content is reduced to <50mg / L. However, due to imperfect desalination and dehydration facilities in the oil field or a large amount of water mixed in for the convenience of crude oil transportation, the crude oil entering the refinery still contains varying amounts of salt and water. Except for a small part of the salt suspended in the crude oil in crystal form, most of the salt is soluble in water. Most of the water is di...

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Problems solved by technology

[0005] The problem with the above two methods is that desiccant is generally used to remove water in sedimentation separation, which requires on-site non-stop treatment of the desiccant after water absorption to restore the water absorption capacity, which brings a large workload to the on-site work; Dehydration needs to consume a lot of electric energy, consumes a lot of energy, and does not conform to the concept of energy conservation and environmental protection advocated now. There are certain problems in both. Therefore, the present invention is based on the process of using sedimentation and separation, followed by dehydration with a desiccant. Partially improved the process to reduce the difficulty of subsequent desiccant dehydration process, improve efficiency, and greatly reduce energy consumption

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