Pre-condensation-separation method in preparing gasoline through aromatization of liquefied gas and device thereof
A technology of condensation separation and aromatization, which is applied in the petroleum industry and the production of liquid hydrocarbon mixtures, etc., to achieve the effect of eliminating the cooling system at the top of the tower, reducing energy consumption, and reducing investment
Inactive Publication Date: 2014-02-26
宝塔国际石化工程技术有限公司
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Problems solved by technology
[0007] The purpose of the present invention is to overcome the defects of the gasoline and diesel oil separation method and device in the existing technology, and provide a pre-condensation separation method for liquefied gas aromatization to gasoline with reasonable technology, more energy saving and investment saving;
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[0017] Such as figure 2 As shown, in the present invention, the liquefied petroleum gas raw material (C4) undergoes raw material pretreatment, washes with water to remove impurities such as methanol, dimethyl ether, and alkali nitrogen, and passes through the heat exchangers (A1, A2, A3) with the (B) The hot material is subjected to heat exchange, and then heated to about 300°C by a heating furnace, and then enters a fixed-bed reactor for aromatization reaction at 280-450°C.
[0018] The reaction product (RP) exchanges heat with the raw material (C4) through the heat exchanger (A2, A3). ) for precise adjustment, within this temperature range, most gasoline and uncooled liquefied gas exist in the form of gas phase, diesel components exist in the form of liquid phase, and the cooled reaction product enters a vapor-liquid separation tank (B), The lower part of the gas-liquid separation tank (B) is equipped with a stripping device, and there is a steam (ZQ) inlet and a diesel (C...
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The invention relates to a pre-condensation-separation method in preparing gasoline through aromatization of liquefied gas and a device thereof. The method is characterized in that: reaction products obtained from a fixed bed is subject to heat exchanging cooling and then enters in a gas-liquid separating tank, the liquid component in the lower portion of the separating tank is subject to steam stripping to let gasoline and light components in the liquid component be discharged from the top of the separating tank, the gasoline and light components in the liquid component and uncooled gas phase products enters a subsequent absorption-stabilization system, the diesel component is discharged from the bottom of the tank, and the temperature of heat exchanging cooling is controlled to guarantee that most gasoline component in the reaction products is in a gaseous state and the diesel component is in a liquid state. Compared with the prior art, the invention can reduce investment and observably save energy.
Description
technical field [0001] The invention relates to the field of petrochemical industry, in particular to a pre-condensation separation method and device for producing gasoline by aromatization of liquefied gas. Background technique [0002] Liquefied Petroleum Gas (LPG) is one of the petroleum products. It is a colorless, volatile gas obtained by secondary processing in refineries. The main components are propane, propylene, butane and butene, and it also contains a small amount of pentane, pentene. [0003] At present, my country's petroleum liquefied gas is mainly burned as civil fuel, the chemical utilization rate is insufficient, and the economic benefits are low; as the domestic fuel market of liquefied petroleum gas has gradually been replaced by relatively cheap natural gas in recent years, the market demand for liquefied petroleum gas has declined , affecting the economic benefits of the refinery. On the other hand, at present, 80% of the blending components in unleade...
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IPC IPC(8): C10G50/00
Inventor 郭辅堂陈宝林曾贤林刘志华成小玲张强
Owner 宝塔国际石化工程技术有限公司