Method for placing waste concrete and sealing and storing carbon dioxide in old abandoned mine shaft

Abstract

The invention discloses a method for placing waste concrete and sealing and storing carbon dioxide in an old abandoned mine shaft. The method comprises the following steps that A, saturated lime wateris injected into a coal bed gas pumping pipe of the old abandoned mine shaft in a pulsing mode; B, saturated lime water is injected to a goaf of the mine shaft in a pulsing mode; C-D, the waste concrete is conveyed into a hopper, and the hopper conducts particle size sieving of the waste concrete by vibrating of a vibrator; E-G, then the sieved waste concrete is conveyed into the goaf of the mineshaft in batches, and meanwhile, the saturated lime water makes the waste concrete to be distributed more widely in the goaf, and then the injected amount of the waste concrete is controlled; and H-I, carbon dioxide gas is injected to the goaf of the mine shaft for storage, and then ground drilled well is sealed. According to the method for placing the waste concrete and sealing and storing the carbon dioxide in the old abandoned mine shaft, the goaf of the abandoned mine shaft is filled with the waste concrete, and meanwhile, the carbon dioxide gas is injected to the goaf of the mine shaft,so that the problems of placing of the waste concrete, filling of the abandoned mine shaft and sealing and storing of the carbon dioxide are solved, and land pollution and the atmospheric greenhouse effect are reduced.

Description

technical field [0001] The invention relates to a method for placing waste concrete in an old abandoned mine and sequestering carbon dioxide. Background technique [0002] Concrete is the largest building material used by human beings, and its theory and technology have become increasingly mature. However, at present, a large amount of concrete is applied, which has brought negative impacts on human settlements and ecosystems. The average lifespan of Chinese buildings is only 35 years, which is far lower than the 70-year lifespan in Europe. Urban demolition and engineering renovations also waste a lot of concrete. According to existing data, it is estimated that by 2020, the amount of waste concrete in my country will be It has reached 628 million tons. Since 97% of the waste concrete in China is directly landfilled and piled up in the open air, a large amount of land resources will be wasted and the environment will be polluted. Therefore, how to dispose of waste concrete ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a method for placing waste concrete in an old abandoned mine and sequestering carbon dioxide. The waste concrete is filled into the goaf of the abandoned mine, and carbon dioxide gas is filled into the goaf of the mine at the same time. So as to solve the problems of waste concrete placement, abandoned mine filling and carbon dioxide sequestration, and reduce land pollution and atmospheric greenhouse effect

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