CO2 resource utilization system and CO2 resource utilization method in household garbage treatment

Abstract

The invention discloses a CO2 resource utilization system and a CO2 resource utilization method in household garbage treatment. The system comprises a pyrolysis unit, an energy-saving deacidifying unit, a gas purifying unit and a CO2 trapping unit, wherein the pyrolysis unit comprises a pyrolysis unit garbage inlet, a CO2-free pyrolysis gas inlet, a pyrolysis carbon outlet and a pyrolysis oil gas outlet; the energy-saving deacidifying unit comprises a pyrolysis oil gas inlet and a deacidified oil gas outlet; the pyrolysis oil gas inlet is connected with the pyrolysis oil gas outlet; the gas purifying unit comprises a deacidified oil gas inlet and a high-CO2 pyrolysis gas outlet; the CO2 trapping unit comprises a high-CO2 pyrolysis gas inlet and a CO2-free pyrolysis gas outlet; the CO2-free pyrolysis gas outlet is connected with the CO2-free pyrolysis gas inlet; and the high-CO2 pyrolysis gas inlet is connected with the high-CO2 pyrolysis gas outlet. According to the CO2 resource utilization system and the CO2 resource utilization method, high-concentration CO2 is separated from the raw material pyrolysis gas, graphene is prepared by a CO2 converter at certain temperature and under certain pressure, the heat value of the pyrolysis gas is increased, and the CO2 resource utilization is realized.

Description

technical field [0001] The invention belongs to the field of solid waste resource treatment, in particular to a CO 2 Systems and methods for resourcing. Background technique [0002] Our country is facing the dual pressure of environment and energy. With the acceleration of economic and urbanization, the national energy consumption is huge. At the same time, 2 / 3 of the big cities are facing the dilemma of garbage siege. Through technical means, domestic garbage can be turned into usable resources. To a certain extent, it can alleviate my country's energy and environmental crisis. Domestic waste pyrolysis technology is more and more favored by people because of its high resource utilization rate and low environmental pollution. The main products of pyrolysis are as follows: 1. Pyrolysis oil, a part of pyrolysis oil can be used as fuel oil after refining; 2. Pyrolysis gas, including some low molecular hydrocarbons such as hydrogen, methane, carbon monoxide, etc., can be used ...

AI Technical Summary

Problems solved by technology

[0007] In summary, at present, the existing technology does not reduce the CO produced in the domestic waste pyrolysis process 2 Separation and making carbon materials such as graphene can increase the calorific value of pyrolysis gas and realize CO 2 Utilization of resources, reducing carbon emissions in the entire domestic waste pyrolysis treatment process, and improving economic benefits

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