The invention discloses an integrated process of a dry
quenching coke coproduction synthesis gas and the downstream product,
methanol of the synthesis gas. The integrated process adopts the following steps that: low-pressure steam or the
mixed gas of low-pressure steam and
coke oven gas is used as cooling gas to absorb red
coke sensible heat and to carry out water-gas reaction with red coke, thereby generating a synthesis gas; after dust removal, the synthesis gas is fed to a steam gas
waste heat boiler and a low-pressure steam
waste heat boiler to carry out heat
recovery, and then is output; the steam gas
waste heat boiler generates steam gas, while the low-pressure steam waste heat boiler generates low-pressure steam which is fed in a dry
quenching coke oven as cooling gas; or the steam gas is used in a
back pressure steam turbine to generate
electricity, and the low-pressure steam left over after
back pressure electricity generation is used as the cooling gas of dry
quenching coke, thereby omitting the low-pressure steam waste heat boiler. Compared with the prior art, the integrated process combines the production of dry quenching coke and synthesis gas, and ensures that the dry quenching
coke oven integrates the functions of quenching coke, conversion, gas making and coke desulfurization; meanwhile,
methanol is made through making use of the synthesis gas generated during dry quenching coke.