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Refinery saturated dry gas recovery system and recovery method

A recovery method and recovery system technology, applied in the processing of gas mixtures, petroleum industry, and hydrocarbon oil treatment, etc., can solve the problems of limited process applicability, low recovery rate, high energy consumption, etc., achieve ideal absorption effect and improve recovery efficiency, increase the effect of ethylene production

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In order to solve the problems of how to recycle and utilize saturated dry gas, and the existing refinery dry gas recycling process has problems such as large investment, high energy consumption, low recovery rate, and limited process applicability, the invention provides a saturated dry gas Gas recovery system and recovery method

Method used

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  • Refinery saturated dry gas recovery system and recovery method

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Embodiment

[0053] like figure 1 Shown, a refinery saturated dry gas recovery system. Including: absorption tower 5, desorption tower 6, reabsorption tower 7, compressor 2 and heat exchanger 3, compressor 2 is connected to heat exchanger 3 and then connected to absorption tower 5, the top of absorption tower 5 is connected to reabsorption tower 7, absorption The bottom of the tower 5 is connected to the desorption tower 6, and the bottom of the desorption tower 6 is connected to the upper part of the absorption tower 5;

[0054] Described system is provided with condensate stripper 4; Compressor 2 condensate outlets connect condensate stripper 4, and condensate stripper 4 tops connect the compressor suction tank 1 of compressor inlet.

[0055] The saturated dry gas of the refinery enters the compressor through the compression suction tank, and the pressure is increased step by step. The condensate at the bottom of the suction tank is sent to the condensate stripper, the light components...

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Abstract

The invention discloses a refinery saturated dry gas recovery system and a recovery method. The system comprises an absorption tower, a desorption tower, a reabsorber, a compressor and a heat exchanger, wherein the system is provided with a condensate stripper; a condensate outlet of the compressor is connected with the condensate stripper, and the top of the condensate stripper is connected with an inlet of the compressor. The method comprises the steps of during the pressure rising of refinery saturated dry gas, delivering an interstage condensate to the condensate stripper, and recovering stripped hydrocarbon as one of products. According to the refinery saturated dry gas recovery system and the recovery method, the products are all delivered to an ethylene unit cracking furnace, an acidic gas removal device, a deoxidation device, a dryer and the like are not required, the investment is reduced, the energy consumption is low, the flow is simple, and the recovery rate is high.

Description

technical field [0001] The invention relates to the field of dry gas treatment, and more specifically, relates to a refinery saturated dry gas recovery system and recovery method. Background technique [0002] Refinery dry gas mainly comes from the secondary processing of crude oil, such as catalytic cracking, thermal cracking, delayed coking, hydrocracking, etc. At present, most refineries in my country still burn the refinery dry gas as fuel gas, which has low utilization value and causes great waste of resources and environmental pollution. [0003] Generally, the content of ethylene in catalytic dry gas is high, which belongs to unsaturated dry gas. Saturated dry gas usually comes from PSA desorption gas, light hydrocarbon dry gas, hydrogenation dry gas, reforming dry gas, etc. Ethane and propane in saturated dry gas The content is relatively high, while the content of ethylene and propylene is very low. Therefore, the composition and application of enriched gas after ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G70/04C10G70/06
CPCC10G70/04C10G70/06
Inventor 过良李东风罗淑娟程建民廖丽华刘智信李琰王婧
Owner CHINA PETROLEUM & CHEM CORP
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