The invention provides a production process and
system of high-purity
hydrogen and an
ammonia synthesis process and
system. The production process of high-purity
hydrogen comprises the steps of generating
water gas by using
bituminous coal, generating shifted gas by using the
water gas, desulfurizing the shifted gas, and carrying out decarbonization and
hydrogen extraction on the shifted gas; the
ammonia synthesis process comprises the steps of hydrogen
nitrogen-feeding and deoxygenization,
nitrogen-
hydrogen compression and
ammonia synthesis. The production
system of high-purity hydrogen comprises a
water gas generating part, a shifted gas generating part, a shifted gas desulfurizing part and a shifted gas decarbonization and hydrogen extraction part; and the ammonia
synthesis system also comprises a hydrogen
nitrogen-feeding and deoxygenization part, a nitrogen-
hydrogen compression part and an ammonia synthesis part. The production process of high-purity hydrogen disclosed by the invention is short in flow, small in resistance, low in
power consumption and low in
operating cost; and the production system of high-purity hydrogen disclosed by the invention is high
in degree of
automation, less in catalyst consumption, less in species, less in operators, good in
operating environment, low in
operating cost and remarkable in energy saving and consumption reducing effect.