The invention provides a
coal gasification and fuel
cell coupled combined heat and
power generation system and method for
papermaking. The
system is composed of a pulping unit, a bleaching unit, a
drying unit, an acidification unit, a
carbonization unit, an alkalization unit, an activation unit, a primary gasification unit, a secondary gasification unit, a water-gas shift unit, a fuel
cell and the like.
Black liquor generated by the pulping and bleaching unit is converted into coarse carbon through the acidification and
carbonization unit, part of the coarse carbon is converted into
activated carbon through the alkalization and activation unit and serves as an adsorbent of the
carbonization unit, part of the coarse carbon and
coal are converted into CO through two-stage gasification and converted into
hydrogen after water-gas conversion, and the
hydrogen serves as a fuel
cell raw material to generate
electric energy; the
system further comprises a plurality of heat exchange units and
heat transfer units, high-grade energy of H2, CO, H2O and the like is utilized to the maximum extent, efficient heat production and
electricity production are achieved through refined
energy management and gradient utilization strategies, and stable and efficient
energy supply is provided for the whole
system.