Method for rapid heating, gasification and combustion of coal under high CO2 enrichment high-pressure environment

Abstract

The invention discloses a method for rapid heating, gasification and combustion of coal under a CO2 enrichment high-pressure environment, mainly comprising the following steps: I, collection and preparation of a coal sample: collecting a coal sample of a target coal seam, drying, hydrating, pulverizing and preparing samples of different requirements; II, laser heating: heating a gasification reaction kettle with a CO2 laser beam rapid heating device; III, control of the gas environment in the reaction kettle: constructing a CO2 enrichment environment in the reaction kettle, and controlling thevolumetric concentration of oxygen in the reaction kettle to be 1%-20.8% by adjusting the amount of injection of CO2; and IV, monitoring and analysis of the synthesis gas yield: studying and analyzing the weight loss rate of the coal samples and the amount of formation of the synthesis gas during the experiment. According to the method in the invention, the CO2 laser rapid heating device is usedfor heating the gasification reaction kettle, which rises to the target temperature in a short time, thereby avoiding slow oxidation of the coal, strengthening the weight loss rate of the coal and theyield of the synthesis gas, and improving the gasification conversion efficiency.

Description

technical field [0001] The present invention relates to a CO 2 The method for rapid heating, gasification and combustion of coal in an enriched high-pressure environment belongs to the technical field of coal gasification combined cycle power generation. Background technique [0002] According to international energy statistics, China has abundant coal resources, and its recoverable coal reserves rank third in the world. In terms of carbon dioxide emissions, China accounts for about 19% of the world's total. About 30% of the total emissions. The International Energy Agency proposes that the continued use of coal as a long-term fuel should be done in a clean and efficient manner under effective carbon management. As far as power generation technologies are concerned, improving energy efficiency is one of the levers for reducing CO2 emissions. The current technologically advanced technology of coal-fired power generation is facing two technical challenges: higher thermal ef...

AI Technical Summary

Problems solved by technology

[0007] Previously, many researchers analyzed the influence of pressure and heating rate on the chemical reactivity of coal under the conditions of high or low heating rate and normal pressure or high pressure, but most of the previous experiments rarely used the system conditions of high pressure and high heating rate , because the laboratory equipment is more difficult to meet the industrial requirements, in order to obtain the expected conditions at the same time

Moreover, the relationship between coal gasification reaction activity and synthesis gas generation is rarely studied on the basis of the basic characteristics of IGCC.

Images