Subcritical carbon dioxide supply system

The invention relates to a subcritical carbon dioxide supply system which sequentially comprises a raw material tank, a booster pump, a buffer tank, a heating device and a purification device in the direction from input to output, the raw material tank is used for storing liquid carbon dioxide, and the booster pump is used for conveying the liquid carbon dioxide in the raw material tank to the buffer tank and pressurizing the liquid carbon dioxide; the heating device is connected with the output end of the buffer tank and used for heating and gasifying the liquid carbon dioxide output by the buffer tank, and the purifying device is used for purifying the gaseous carbon dioxide output by the heating device and removing impurities in the gaseous carbon dioxide. The subcritical carbon dioxide supply system provided by the invention is higher in continuous supply performance and stability. 本发明涉及一种亚临界二氧化碳供应系统，按输入至输出方向，依次包括原料罐、增压泵、缓冲罐、加热装置及纯化装置，所述原料罐用于储存液态二氧化碳，所述增压泵用于将所述原料罐的液态二氧化碳输送至所述缓冲罐并加压，所述加热装置连接缓冲罐的输出端，用于将缓冲罐输