Energy storage system for co-production of hydrogen and urea and method thereof

Abstract

The invention discloses an energy storage system for co-production of hydrogen and urea and a method thereof. The energy storage system comprises a renewable energy power supply, an electrolytic hydrogen production device, a hydrogen storage tank, an oxygen storage tank, an ammonia synthesis reactor, an air separation device and a urea synthesis reactor, water is introduced into the input end of the electrolytic hydrogen production device; the oxygen output end is connected to an oxygen storage tank; the hydrogen output end is connected to a hydrogen storage tank; the output end of the hydrogen storage tank is connected to a hydrogen inlet of an ammonia synthesis reactor; wherein air is introduced into the input end of the air separation device, the oxygen output end is connected to the oxygen storage tank, the nitrogen output end is connected to a nitrogen inlet of the ammonia synthesis reactor, the ammonia output end of the ammonia synthesis reactor is connected to an ammonia gas inlet of the urea synthesis reactor, and a flue gas inlet for introducing flue gas is further formed in the urea synthesis reactor; and the electrolytic hydrogen production device and the synthetic ammonia reactor are powered by a renewable energy power supply.

Description

technical field [0001] The invention relates to the fields of renewable energy and hydrogen energy storage, in particular to an energy storage system and method for co-producing hydrogen and urea. Background technique [0002] Under the global environment of climate change, my country has actively promoted the transformation of energy structure in recent years, greatly increased the proportion of renewable energy in energy production and consumption, and gradually realized the replacement of fossil energy. However, due to the volatility and intermittency of wind energy and solar energy, coupled with the imbalance in the spatial distribution of water, wind, and light resources and energy demand in my country, all renewable energy cannot be integrated into the grid for consumption, and even large-scale water abandonment occurs. , Abandoned wind, and abandoned light phenomena. In the future, with the further increase of the proportion of renewable energy, the pressure of renewa...

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Problems solved by technology

[0003] At present, my country's hydrogen energy infrastructure is weak, and the hydrogen consumption market has not yet formed a scale. The clean hydrogen produced by a large amount of renewable energy will face the problem that it cannot be completely and directly utilized.

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