Calcium-based energy storage device

The utility model belongs to the technical field of energy storage, and discloses a calcium-based energy storage device which comprises a reactor, a gas-particle separator, a heat exchanger and a storage bin, the reactor comprises a shell and a storage space defined by the shell, the shell is sleeved with a heating cylinder, a spiral lifting machine is placed in the storage space and provided with a feeding port and a discharging port, and the feeding port and the discharging port are communicated through the heating cylinder. Raw materials can enter the feeding port and are conveyed to the discharging port, the discharging port communicates with the gas-particle separator, the top of the gas-particle separator communicates with an inlet of the heat exchanger, and the bottom of the gas-particle separator communicates with the storage bin. Raw materials are heated and decomposed into CaO and H2O in the reactor, energy storage is achieved, after decomposed products are separated through the gas-particle separat