Device for removing trace aromatic hydrocarbons through disproportionation and transalkylation tail hydrogen recontact and method for removing trace aromatic hydrocarbons.
A technology of transalkylation and recontact, which is applied in chemical instruments and methods, separation methods, gas treatment, etc., and can solve problems such as the inability to reduce the loss of aromatics
Pending Publication Date: 2021-05-11
中海石油宁波大榭石化有限公司
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Problems solved by technology
Therefore, the existing patented technology requires that the reforming recontact unit has sufficient load to receive the disproportionated tail hydrogen, and cannot reduce the loss of aromatics in the disproportionation and transalkylation unit
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[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0024] Such as figure 1 As shown, the device for disproportionation and alkylation transfer tail hydrogen in this embodiment and then contacting to remove trace aromatics includes a hot separation tank 1, a cold separation tank 2, a heat exchanger 3, an oil and gas separation tank 4, a chilled water pipe 36 and mixed oil Trachea35.
[0025] The top of the hot separation tank 1 has a first gas phase delivery pipe 14, and the bottom end has a first bottom liquid output pipe 12 and a second bottom liquid output pipe 13; the top of the cold separation tank 2 has a second gas phase delivery pipe 22 and a hydrogen circulation pipe 23, The middle part has a first feed port 21, and the bottom has a third bottom liquid output pipe 24 and a fourth bottom liquid output pipe 25; the first feed port 21 is connected to the first gas phase delivery pipe 14;...
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A device for removing trace aromatic hydrocarbons through disproportionation and transalkylation tail hydrogen recontact is characterized by The comprises a hot separation tank, a cold separation tank, a heat exchanger, an oil-gas separation tank, a chilled water pipe and a mixed oil-gas pipe, the top end of the hot separation tank is provided with a first gas phase conveying pipe, and the bottom end of the hot separation tank is provided with a first base solution output pipe and a second base solution output pipe; the top of the cold separation tank is provided with a second gas-phase conveying pipe and a circulating hydrogen pipe, the middle is provided with a first feeding hole, and the bottom is provided with a third base solution output pipe and a fourth base solution output pipe; and the invention also discloses a method for removing trace aromatic hydrocarbons. The method does not need to depend on a reforming device any more, a liquid phase separated from a thermal separation tank of disproportionation and transalkylation reaction products and a part of split flow of tank bottom oil are used as absorption oil to absorb heavy components in disproportionation tail hydrogen, the removal rate of aromatic hydrocarbon can reach 80%, the removal rate of C5 + petroleum hydrocarbon can reach 74%, and the aromatic hydrocarbon resources can be effectively recovered.
Description
technical field [0001] The invention relates to a tail hydrogen treatment device, in particular to a disproportionation and alkyl transfer tail hydrogen treatment device, and also relates to a method for removing trace aromatics in the tail hydrogen. Background technique [0002] Hydrogen is an important resource for refining and chemical enterprises, so how to efficiently recycle the by-products (hydrogen-rich tail gas) in the production process of refining and chemical equipment has been a problem that relevant professionals have been paying attention to and paying attention to. At present, pressure swing adsorption (PSA) method, membrane separation method, cryogenic separation method and other methods are usually used for hydrogen-rich tail gas in refining and chemical units, and pressure swing adsorption (PSA) method is the most commonly used method. [0003] The existing disproportionation and alkyl transfer tail hydrogen contains a small amount of C5+ petroleum hydroca...
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IPC IPC(8): B01D53/18B01D53/14B01D53/00
CPCB01D53/002B01D53/1487B01D53/18B01D2257/7027
Inventor 练弢朱旭东王以科夏雨雨张志良王仕文廖原毅段鹏刘丽洁郭亮
Owner 中海石油宁波大榭石化有限公司