Abstract: The present disclosure relates to the technical field of electrolytic cell waste heat recovery, and specifically to a waste heat-to-steam supply system and steam supply method for alkaline electrolytic cells. The system includes a waste heat recovery module, a heat pump module and a steam generation and supply module. The waste heat recovery module includes an alkaline electrolysis unit and a cooling unit. The heat pump module includes a first power supply unit, a second power supply unit, an electric motor, and a compressor. The steam generation and supply module includes a steam generation unit and a steam supply unit. In the present disclosure, a heat transfer medium recovers the waste heat of the alkaline electrolytic cell, and after compression and heating, the heat network feedwater is heated and evaporated into high-temperature steam, which is then supplied to industrial steam users.

Abstract: The present disclosure belongs to the technical field of hydrogen production by water electrolysis, and relates to an energy optimization heat pump system and method for hydrogen production by water electrolysis with low-pressure ratio. It includes a hydrogen oxygen gas-liquid separation unit, a heat pump compressor, and an expander. The hydrogen oxygen gas-liquid separation unit is connected to the hydrogen dryer through a hydrogen cooler. The hydrogen oxygen gas-liquid separation unit is connected to the heat pump absorber through a circulating cooling water pipeline, the hydrogen cooler is connected to the refrigerator through a refrigerant pipeline, and the hydrogen dryer is connected to the steam generator through a hot water pipeline and a steam pipeline respectively. The present disclosure is conducive to reducing the pressure ratio of the heat pump compressor, enriching the selection range of heat pump working fluids, and improving the energy utilization rate of the system.