Separation method and device for reforming reaction product

Abstract

The invention relates to a separation method and separation device for a reform reaction product, and particularly relates to a hydrogen pre separation method of the reform reaction product. The separation method mainly includes the following steps: the reform reaction product (1) and reform reaction feed materials (2, 3), after heat transfer by (4), directly enters into an additionally arranged pre separation tank (7); a pre separation gas phase (9), after cooling by an air cooler(11), enters a subsequent separation tank (12) and a recontact part for separating circulating hydrogen (13) and high purity hydrogen; a pre separation liquid phase (10), after mixing with a recontact tank liquid phase (8), directly enters into a subsequent fractionation part. The separation method reduces the flow quantity of repeated cooling and heating material flows, reduces the heating load of the fractionation part, and alleviates the contradiction of summer cooling underload, and compared with the prior art, the separation method reduces the cooling load by 14.5%, reduces the heating load by 18.2%, and is remarkable in energy-saving effect.

Description

technical field

[0001] The invention belongs to the technical field of separation of reforming reaction products in oil refining processes, and in particular relates to a two-stage condensation separation method for separation of reforming reaction products. Background technique

[0002] The reforming process is an important process in the oil refining and petrochemical industry, and is mainly used to produce high-octane gasoline or important chemical raw materials such as benzene and p-xylene. The reforming reaction temperature is relatively high, ranging from 380 to 520°C. After heat exchange between the high-temperature reforming reaction product and the reforming reaction feed, it is still 90 to 110°C. At this time, the reaction product is in a gas-liquid two-phase state. In order to separate the hydrogen in the product for recycling and delivery, at present, all domestic reformers use air cooling to reduce the temperature of the reaction product to 30~50°C during produc...

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