A resource utilization method and system for storing and releasing carbon dioxide in goaf of abandoned mine

Abstract

The invention discloses a resource utilization method and a system for storing-releasing carbon dioxide in a goaf of an abandoned mine, belonging to the field of comprehensive utilization of resources. The present invention adopts CO 2 The mixed waste gas is sent into the goaf of the abandoned mine, and the goaf of the abandoned mine is used to reduce CO emissions. 2 The mixed exhaust gas filters part of the gas in the pores of the overlying rock layer of the broken coal seam, and uses the extraction well to send it to the surface vegetation, participates in the photosynthesis of the vegetation, promotes the growth, and then utilizes CO 2 Carry out photosynthesis to realize the resource utilization of carbon dioxide released in the goaf of abandoned mines. The present invention simplifies CO as a whole 2 Purification process and absorption treatment process use existing resources and waste resources to reduce cost input and increase CO2 as a whole 2 resource utilization efficiency.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of resources, and relates to a resource utilization method and system for storing and releasing carbon dioxide in goafs of abandoned mines. Background technique [0002] carbon dioxide (CO 2 ) is a by-product of the combustion of chemical fuels such as coal, oil, and natural gas. Humans, animals and plants also exhale a large amount of CO during their metabolism. 2 gas. CO in the atmosphere 2 This one-way valve is similar to greenhouse glass, which allows the short-wave radiation of the sun to enter and prevents the long-wave radiation from the surface to space. CO 2 The greenhouse effect makes it play a pivotal role in controlling the global climate. CO at this stage 2 There are three main ways for gas treatment and disposal, including separation and recovery, disposal and effective utilization. Among them, separation and recovery mainly include absorption separation method, adsorpt...

AI Technical Summary

Problems solved by technology

[0003] The above method has the following problems: (1) CO 2 Gas absorption and separation methods include physical absorption and chemical absorption. The efficiency of physical absorption and separation is not high, and the cost is high. Chemical absorption is prone to bubbles and entrainment, and the energy consumption and investment are large; CO 2 The gas adsorption separation method has limited adsorption capacity, requires a large amount of adsorbent, frequent adsorption and desorption, and a low degree of automation; CO 2 Gas membrane separation method is difficult to obtain high-purity CO 2 ;CO 2 Gas membrane separation-absorption combined process is complex

(2) CO 2 Underground storage of gas is relatively safe and reliable, flexible in application, and has sufficient storage capacity, but its use value is low and resources are wasted

(3)CO 2 The photosynthesis and chemical fixation of plants and algae are in line with the viewpoint of green chemistry, but the utilization rate is limited and cannot be compared with the emitted CO 2 total balance

[0004] In summary, CO 2 Gas purification and absorption treatment processes often require a large amount of cost input, and their resource utilization efficiency needs to be improved

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