Light hydrocarbon recycling system and method

A light hydrocarbon recovery and light hydrocarbon technology, which is applied to the recovery of liquid hydrocarbon mixtures, hydrocarbon distillation, and hydrocarbon oil treatment, can solve problems such as increased vaporization, high pressure in fractionation towers, and effects on the vacuum degree of vacuum fractionation towers. Effects of recycling rate, load reduction, and product quality improvement

Active Publication Date: 2016-05-11
HAINAN HANDI SUNSHINE PETROCHEM
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, in the above-mentioned process, since the low-fraction oil directly reaches the heating furnace for further heating through the heat exchanger, after entering the vacuum fractionation tower, because the low-fraction oil contains more light hydrocarbons (about 2 to 6%), it will cause vaporization When the amount of oil is increased, especially when the nat

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  • Light hydrocarbon recycling system and method

Examples

Experimental program
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Example Embodiment

[0077] Example 1

[0078] Preparation of light hydrocarbon recovery system, specifically: plate type single overflow light hydrocarbon recovery tower, variable angle adjustment type air cooler connected to the top outlet of plate type single overflow light hydrocarbon recovery tower, and variable angle adjustment type air cooler outlet U-shaped shell and tube water cooler; horizontal light hydrocarbon separator with inlet connected to the outlet of U-shaped shell and tube water cooler; reciprocating light hydrocarbon booster with inlet connected to the gas outlet of the horizontal light hydrocarbon separator, reciprocating The supercharger delivers light hydrocarbons to the fuel gas pipeline network.

Example Embodiment

[0079] Example 2

[0080] The above-mentioned light hydrocarbon recovery system is used in the hydroisomerization system of white oil. The control temperature of low oil separation is 270℃, the low oil content entering the light hydrocarbon recovery tower is 24t / h, and the top temperature of the light hydrocarbon recovery tower is 160℃ , The pressure is 0.2Mpa, after rectification, the gas phase part passes through the top outlet of the tower, passes through the air cooler and the water cooler twice to condense to the light hydrocarbon separator, the temperature of the air cooler is 85℃; the cooling water of the water cooler is 20℃; the gas-liquid separator The inlet temperature is 50°C; the dehydration boundary is 50%, the gas phase of the light hydrocarbon separator passes through the light hydrocarbon recovery device to obtain recovered light hydrocarbons, and the oil phase outlet of the light hydrocarbon separator is fine white oil. After calculation, the amount of light hydr...

Example Embodiment

[0081] Example 3

[0082] The above-mentioned light hydrocarbon recovery system is used in the white oil hydroisomerization system. The low oil separation control temperature is 280℃, the low oil content entering the light hydrocarbon recovery tower is 24t / h, and the light hydrocarbon recovery tower top temperature is 170℃ , The pressure is 0.25Mpa, after rectification, the gas phase part passes through the top outlet of the tower, passes through the air cooler and water cooler twice to condense to the gas-liquid separator, the temperature of the air cooler is 90℃; the cooling water of the water cooler is 20℃; the gas-liquid separator The inlet temperature is 60°C; the dehydration boundary is 50%, the gas phase of the light hydrocarbon separator passes through the light hydrocarbon recovery device to obtain recovered light hydrocarbons, and the oil phase outlet of the light hydrocarbon separator is fine white oil. After calculation, the amount of light hydrocarbon recovered is 24...

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Abstract

The invention provides a light hydrocarbon recycling system which comprises a light hydrocarbon recycling tower, an air cooler, a water cooler, a light hydrocarbon separator and a light hydrocarbon recycling device. An inlet of the air cooler is connected with an outlet at the top of the light hydrocarbon recycling tower, a temperature control executing device is arranged on the upper portion of the air cooler, an inlet of the water cooler is connected with an outlet of the air cooler, an inlet of the light hydrocarbon separator is connected with an outlet of the water cooler, a temperature control device is arranged on the light hydrocarbon separator, and an inlet of the light hydrocarbon recycling device is connected with a gas outlet of the light hydrocarbon separator. Light hydrocarbon is preliminarily separated through the light hydrocarbon recycling tower and subjected to temperature control and condensation for two times and finally reaches the light hydrocarbon separator for further separation to obtain recycled light hydrocarbon and fine white oil, so that compared with the prior art, the light hydrocarbon recycling system has the advantages that load of a distilling tower is reduced, recycling rate of light hydrocarbon is increased, device energy consumption is lowered, and product quality of the fine white oil is improved.

Description

technical field [0001] The invention relates to the technical field of oil refining, in particular to a light hydrocarbon recovery system and method. Background technique [0002] White oil refining is an ultra-deeply refined special mineral oil product. Its components are generally naphthenes and alkanes with a molecular weight of 250-400. It is a lubricating oil fraction. It is colorless, tasteless, and odorless. Thermal stability, wide range of uses. As an emerging product item, white oil is being valued by the domestic petrochemical industry. [0003] At present, domestic production of white oil is mainly produced by sulfonation of base oil, which has high cost, great environmental pollution and unstable product quality. With the development of petroleum hydrogenation technology, in the 1960s, the hydrogenation refining technology for white oil production appeared abroad. It has the characteristics of high yield, no three wastes, flexible production, and excellent pro...

Claims

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Application Information

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IPC IPC(8): C10G7/00C10G5/06
CPCC10G5/06C10G7/00C10G2300/1037C10G2300/304C10G2400/14
Inventor 于海彬王东升
Owner HAINAN HANDI SUNSHINE PETROCHEM
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