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Oxygen-enriched combustion poly-generation process and equipment for steam injection boiler in oil field

A technology of steam injection boiler and oxygen-enriched combustion, which is applied in the direction of inorganic chemistry, chemical instruments and methods, nitrogen compounds, etc., can solve the problems of unseen large-scale demonstration projects or engineering applications, reduced economic benefits, high energy consumption, etc., and achieve saving The effect of long-distance transportation costs, increased benefits, and large profits

Inactive Publication Date: 2013-05-08
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The research is relatively mature, but there are no large-scale demonstration projects or engineering applications. The main problem is the preparation of high-purity O by air separation. 2 Large investment and high energy consumption lead to lower economic benefits of the entire system

Method used

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  • Oxygen-enriched combustion poly-generation process and equipment for steam injection boiler in oil field
  • Oxygen-enriched combustion poly-generation process and equipment for steam injection boiler in oil field

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Embodiment 1

[0038] Oilfield steam injection boiler oxygen-enriched combustion polygeneration process such as figure 1 shown. Cryogenically separate the air to obtain nitrogen and pure oxygen. The nitrogen is sent to the oil recovery system for secondary oil recovery, tertiary oil recovery, oil and gas well protection or transportation protection. Pure oxygen is introduced into the oilfield steam injection boiler and mixed with fuel oil for combustion. Exhausted CO rich 2 The flue gas is divided into two parts, the first part is the circulating gas, which is pressurized by the circulating fan and circulated to the burner of the steam injection boiler in the oil field, and the high-purity oxygen produced by the cryogenic air separation oxygen generator before entering the burner It is mixed through a three-way pipeline and used as an oxidant for heavy oil combustion, in which oxygen accounts for 27-30%. The flow rate can be adjusted by the recirculation fan, which is adjustable and accoun...

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Abstract

The invention relates to an oxygen-enriched combustion poly-generation process and equipment for a steam injection boiler in an oil field. According to the invention, air is subjected to deep cooling air separation so as to obtain nitrogen and pure oxygen; the pure oxygen is introduced into a steam injection boiler in an oil field and is mixed and burned with fuel oil so as to obtain CO2-rich flue gas; a part of the CO2-rich flue gas is used as circulation gas and is mixed with the pure oxygen, and mixed gas enters into the steam injection boiler; the rest part of the CO2-rich flue gas is compressed and condensed by using a CO2 liquefaction system so as to obtain high purity CO2, and the high purity CO2 is delivered to an oil displacement system of the oil field; flue gas which has undergone condensation and removal of CO2 enters into a SO2 and NOx recovery system so as to realize condensation and recovery of SO2 and NOx. According to the invention, the technology of oxygen-enriched combustion is introduced into the steam injection boiler, which enables the problem of storage of CO2 to be overcome and allows recovery and treatment of residual flue gas to be realized by using a simple method, thereby realizing integrated simultaneous removal of pollutants and protecting atmospheric environment; since a plurality of byproducts are obtained, considerable economic benefits can be achieved.

Description

technical field [0001] The invention relates to an oxygen-enriched combustion process and equipment for steam injection boilers in oil fields, in particular to CO in the flue gas of steam injection boilers in oil fields. 2 The technology of capturing and utilizing various by-products and utilizing them as resources in the process belongs to the technical field of oilfield resource utilization. Background technique [0002] In recent years, the frequent occurrence of extreme climate events has brought a series of far-reaching disasters to human beings and ecosystems. Global warming is the background for the increase and enhancement of these events. Global warming is caused by the greenhouse effect, in which CO 2 is the main greenhouse gas. thus reducing CO 2 Emissions are critical to mitigating global warming. [0003] Burning of fossil fuels leads to atmospheric CO 2 The main reason for the large increase in concentration is the CO in the flue gas 2 The capture utiliza...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/50C01B21/20
Inventor 马春元王志强宋园园董勇张立强崔琳
Owner SHANDONG UNIV
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