Coal-fired unit flue gas moisture and waste heat recycling system based on ceramic membrane method

The invention discloses a coal-fired unit flue gas moisture and waste heat recycling system based on a ceramic membrane method. Core elements of the system are a nano ceramic membrane heat exchanger and a micron ceramic membrane heat exchanger. Under the action of a capillary condensation mechanism, the nano-film ceramic heat exchanger recycles heat and moisture from flue gas before desulfurization, the recycled moisture serves as boiler replenishing water to be replenished into a condenser hot well, and the recycled heat heats condensed water flowing between low-temperature heaters; and under the action of membrane condensation, the micron membrane ceramic heat exchanger recycles moisture from the desulfurized flue gas, and the recycles moisture enters a cooling tower to supplement circulating cooling water. 本发明公开了一种基于陶瓷膜法的燃煤机组烟气水分及余热回收利用系统。该系统的核心元件是纳米陶瓷膜换热器和微米陶瓷膜换热器。在毛细冷凝机制的作用下，纳米膜陶瓷换热器从脱硫前的烟气中回收热量和水分，其回收的水分作为锅炉补水补入凝汽器热井，回收的热量加热低温加热器之间流动的凝结水。在膜状凝结的作用下，微米膜陶瓷换热器从脱硫后的烟气中回收水分，其回收的水分进入冷却塔，补充循环冷却水。