The invention discloses a process and a
system for combining waste
electricity hydrogen production with
circulating fluidized bed boiler combustion. During deep peak regulation, a part of
flue gas is used as circulating
flue gas, a part of circulating
flue gas is mixed with air or
oxygen to obtain primary air, the primary air is used as fluidizing air to enter a
hearth from the lower part of the
hearth, the other part of circulating
flue gas is mixed with
oxygen to obtain secondary air, and the secondary air is fed into the
hearth from the upper part of the hearth; the
oxygen content in the primary air is lower than that in the air, and the
oxygen content in the secondary air is higher than that in the air; the oxygen for mixing comes from a water
electrolysis hydrogen production process; and in the water
electrolysis hydrogen production process, waste
electricity is adopted for water
electrolysis hydrogen production. By means of the process and
system, the problems that in-furnace
fluidization safety is poor when the circulating
fluidized bed unit is subjected to deep peak regulation, the original generation amount of in-furnace
nitric oxide is increased, and the concentration of
carbon dioxide in
flue gas is low can be effectively solved, and therefore the deep peak regulation capacity of the
circulating fluidized bed boiler generator unit is improved.