Coal-burning installation based on calcium sulphate oxygen carrier and coal burning method

Abstract

A coal burner based on calcium sulfate oxygen carrier and relative burning method realizes circulated oxygen carrier and the separation of carbon dioxide. The inventive device is formed by a circular fluid bed, a cyclone separator and a fluid bed into a circular loop. And the method comprises that oxidizing the calcium sulfide with air in the circular fluid bed to generate calcium sulfate, and to be separated by the cyclone separator; then the calcium sulfate is fed into the fluid bed; the coal of fluid bed is reacted with carbon monoxide which can reduce the calcium sulfate to generate the carbon dioxide and calcium sulfide, and the carbon dioxide is discharged via the air outlet of fluid bed; and part of carbon dioxide is extracted and circulated into the fluid bed; the reduced calcium sulfide is feedback to the circular fluid bed to be oxidized with the air. The invention can separate the carbon dioxide from the product without additional energy consumption.

Description

technical field [0001] The invention relates to a coal combustion method, specifically a device and method for realizing a coal combustion process based on a circulating oxygen carrier and separating carbon dioxide during the combustion process. Background technique [0002] Carbon dioxide is the most influential greenhouse gas among many potential greenhouse gases. How to reduce carbon dioxide emission has become one of the main contents of human sustainable development in the future. The conventional combustion technology is the direct contact combustion of fuel and air, and the carbon dioxide in the generated flue gas only accounts for 10-15%. The subsequent treatment (concentration and purification) of carbon dioxide is too costly, and the following methods are usually used: [0003] 1. The molecular membrane separation method is used to separate and purify carbon dioxide. The separation efficiency is low and the cost is high. If a thermal power plant adopts this method ...

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Problems solved by technology

[0003] 1. Separation and purification of carbon dioxide by molecular membrane separation method has low separation efficiency and high cost. If a thermal power plant adopts this method to separate and treat carbon dioxide in flue gas, it will increase the cost of power generation by 20%

[0004] 2. Removing carbon dioxide through biological photosynthesis and finding high-efficiency biological algae for large-scale removal of carbon dioxide still need technological breakthroughs

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