Method for solidifying carbon dioxide by utilizing water produced from high-salinity coal-bed gas field

Abstract

The invention discloses a method for solidifying carbon dioxide by utilizing water produced from a high-salinity coal-bed gas field, and belongs to the field of environmental engineering. The method comprises the following steps: CO2, fly ash, desulfurized gypsum and water produced from the high-salinity coal-bed gas field are injected into a first stage reactor; a mixture obtained after the firststage reaction enters a second stage reactor, CO2 is injected into the second stage reactor at the same time, and the CO2 escaping from the first stage reactor is also injected into the second stagereactor; the mixture obtained after the second stage reaction enters a third stage reactor, and the CO2 escaping from the second stage reaction is injected into the third stage reactor; the mixture obtained after the third stage reaction enters a fourth stage reactor, and the escaped CO2 is injected back into the first stage reactor; the mixture precipitated in the fourth stage reactor is transported to an abandoned pit for seal and storage, and supernatant partially flows back to the first stage reactor. The method is simple in operation; by utilizing cheap materials such as the fly ash, thedesulfurized gypsum and the like, and water produced from high-salinity coal-bed gas fields, CO2 can be effectively sealed and stored, and at the same time, the problem of the treatment of water produced from the high-salinity coal-bed gas fields is solved.

Description

technical field [0001] The invention relates to the field of environmental engineering, in particular to a method for solidifying carbon dioxide by using water produced from a high-salinity coalbed gas field. Background technique [0002] Various human industrial activities produce a large amount of CO 2 Emissions into the atmosphere make the earth's surface form a thick insulation layer, more surface heat is difficult to radiate out, and the earth's temperature rises significantly, thus forming the greenhouse effect. The Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4) synthesis report attributed global warming to CO 2 、CH 4 increase in greenhouse gases. Global warming endangers human beings and the entire earth's environmental system, and actions to control greenhouse gas emissions are urgent. [0003] As a major consumer of coal in my country, the development, processing and utilization of coal not only produces a large amount of carbon ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for solidifying carbon dioxide by utilizing the output water of high-salinity coalbed methane fields, so as to solve the problem of CO 2 The mineral carbonation fixation mimics the natural CO 2 The mineral absorption process, the reaction process is extremely slow, can not be directly applied to the problem of industrial process

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