A chemical looping combustion power generation process and system using landfill gas

Abstract

The present invention discloses a chemical looping combustion power generation process and system using landfill gas, which falls into the range of efficient landfill gas cleaning and utilization technique. This power generation system is composed of a landfill gas collection system, a chemical looping combustion system, and a gas and steam combined cycle power generation system. In the process, the simple substance metal in the air reactor takes oxidation reaction with air, the landfill gas and the obtained metal oxide take reduction reaction in the fuel reactor to generate single substance metal, CO2 and water vapor, and the reduced simple substance metal returns to the air reactor via the refeed line and completes the regeneration of metal oxide; the gas at the outlet of the fuel reactor and the gas at the outlet of the air reactor are led to two separate gas and steam combined cycle power generation systems for power generation and CO2 recovery.

Description

technical field [0001] The invention belongs to the technical scope of high-efficiency and clean utilization of landfill gas, and in particular relates to a chemical chain combustion power generation process and system based on the combustion and power generation process of landfill gas using landfill gas. Background technique [0002] Landfill gas is a kind of renewable energy with high methane content, and its calorific value is equivalent to that of city gas, which is about half of the calorific value of natural gas. Carry out energy utilization work on it to achieve the goal of turning waste into treasure and achieving a win-win situation. The content of carbon dioxide in landfill gas is also very high. Carbon dioxide is the most influential greenhouse gas among many greenhouse gases. How to reduce carbon dioxide emission has become one of the important contents of human sustainable development. The conventional combustion technology is direct contact between fuel and a...

AI Technical Summary

Problems solved by technology

[0003] 1. Post-combustion treatment technology, such as separation and purification of carbon dioxide by molecular membrane separation method, has low separation efficiency and high cost

[0004] 2. The pre-combustion treatment technology is that the fuel is first gasified in the gasifier to generate synthesis gas H 2 and CO, then enter the water gas reactor, the CO produced will be 2 H obtained after separation 2 Used for gas turbine power generation, however no large-scale gasification plants are currently in operation

[0005] 3. Removing carbon dioxide through plant photosynthesis and finding high-efficiency biological algae for large-scale removal of carbon dioxide still need technological breakthroughs

Images