Supercritical and above parameter coal power unit coupling supercritical water hydrogen production system and method thereof

Abstract

The invention provides a supercritical and above parameter coal power unit coupling supercritical water hydrogen production system and a method thereof, and the system comprises a supercritical and above parameter coal power unit thermodynamic system which is used for providing supercritical water, pulverized coal and low-pressure medium-temperature water; and a supercritical and coupling hydrogen production system used for producing hydrogen by using supercritical water, pulverized coal and low-pressure medium-temperature water. The residual load space of the coal power unit can be fully utilized, the unit is in a high-load-level operation state, the operation level and efficiency of the coal power unit are improved, when the unit participates in load reduction and peak regulation, under the condition that the evaporation capacity of a boiler is not reduced, generated supercritical water can be effectively utilized, the generating capacity is reduced, flexible peak regulation is achieved, and the unit service life is prolonged. The thermodynamic system of the supercritical and above parameter coal generator set can be directly transformed through the existing widely adopted supercritical and above parameter coal power unit thermodynamic system, so that the related cost of supercritical water hydrogen production is greatly reduced.

Description

technical field [0001] The invention belongs to the field of clean energy conversion, and in particular relates to a system and method for producing hydrogen by coupling supercritical water to a coal-fired power unit with parameters above and beyond. Background technique [0002] As the most widely distributed substance in the universe, hydrogen is considered to be the cleanest and most potential form of energy in the world due to its high calorific value per unit mass and the final product of oxidation reactions such as combustion being water. Countries around the world, including my country, have carried out a lot of research and application in the field of hydrogen energy, such as hydrogen fuel cells, large-scale abandonment of wind and electricity to produce hydrogen, and advanced coal-to-hydrogen technology. The large-scale application of hydrogen energy mainly focuses on the three aspects of production, storage, and utilization. In terms of production, in recent years,...

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Problems solved by technology

However, due to the aggravation of environmental problems such as global warming caused by greenhouse gas emissions, the installed capacity of renewable energy, such as wind power, photovoltaic and other power generation technologies, has continued to rise, which has greatly squeezed the power generation space of thermal power generation units. At this stage, many of them are in the state of extremely low utilization hours throughout the year. The efficiency of thermal power generation units under low-load operation is low, and the rapid change of load will also greatly reduce the life of the units. How to make good use of related technologies for coal-fired power units Effective utilization of the remaining load space is a difficult research point at this stage

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