CCUS (Carbon Capture, Utilization and Storage) system applied to petroleum and petrochemical industries and process method

Abstract

The invention discloses a CCUS (Carbon Capture, Utilization and Storage) system applied to petroleum and petrochemical industries and a process method. The CCUS system is characterized in that air is separated to obtain nitrogen gas and oxygen-rich gas; the oxygen-rich gas is introduced into a steam-gas boiler, and is mixed and burns with fuel natural gas; a part of obtained flue gas is taken as recycle gas, and is mixed with the oxygen-rich gas, and a mixture is introduced into the boiler; the other part of the obtained flue gas is subjected to a tri-reforming reaction with the fuel natural gas in a tri-reforming reactor; synthetic gas obtained by the reaction can be used in two ways; in one way, the synthetic gas is directly recycled into an oil deposit for displacement; in the other way, the synthetic gas is introduced into a slurry bed reactor for synthesizing DME (Dimethyl Ether) by a one-step method, CO2, DME, methanol and water are obtained step by step through condensation of a condenser by a separation device, an absorption device and a rectification device, and N2 prepared by an air separating device, steam generated by the steam-gas boiler, and CO2 separated by a CO2 separation device are injected into the oil deposit at the same time for displacement. Through combination of an oxygen-rich burning technology, a natural gas and flue gas tri-reforming technology and a one-step DME synthesizing technology, resource utilization of a plurality of gases, methanol and water is realized.

Description

technical field [0001] The invention relates to the technical field of utilization of oil field resources, in particular to a CCUS system and a process method applied in the petroleum and petrochemical industry. Background technique [0002] Global warming has caused the rise of the average surface temperature, the emergence of extreme climates, and the acidification of seawater, which have become major issues that have attracted the attention of the world today, seriously affecting the survival and development of human beings. The root cause of global warming is the greenhouse gas CO 2 emissions, thus reducing CO 2 Emissions are critical to mitigating climate warming. [0003] In recent years, CCS (Carbon Capture and Storage) has always been the focus of the international community. As a developing country, my country is also increasing its efforts to reduce emissions while continuously developing its economy. Based on this, CCUS (Carbon Capture, Utilization and Storage) ...

AI Technical Summary

Problems solved by technology

Generally speaking, for the petroleum and petrochemical industry, in order to meet the needs of oil development and enhance oil recovery, carbon dioxide is usually injected into oil reservoirs for oil displacement. Most of the gas source is CO from the flue gas of coal-fired power plants. 2 , while the main component in the flue gas is nitrogen, and the content of carbon dioxide is relatively low, resulting in high energy consumption for separation and high capture cost; the captured CO 2 It has to be transported to the corresponding oil well through pipelines, which virtually increases the cost of pipeline laying

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