Hydrocarbon synthesis reaction apparatus, hydrocarbon synthesis reaction system, and method for collection of liquid hydrocarbon

Disclosed is a hydrocarbon synthesis reaction apparatus for synthesizing a hydrocarbon through a Fischer-Tropsch synthesis reaction. The apparatus comprises a reaction vessel, a flow path, a first cooling unit, a second cooling unit, a first separation unit for separating a liquid hydrocarbon that has been concentrated by means of the first cooling unit from a gaseous hydrocarbon, and a second separation unit for separating a liquid hydrocarbon that has been concentrated by means of the second cooling unit from a gaseous hydrocarbon, wherein the first cooling unit cools a gaseous hydrocarbon passing through the flow path to a temperature equal to or lower than a condensation temperature at which a wax fraction is condensed and higher than a congeal point at which the wax fraction congeals, and the second cooling unit cools a gaseous hydrocarbon passing through the flow path to a temperature lower than a temperature to which the gaseous hydrocarbon is cooled by means of the first cooling unit and higher than a congeal point at which an intermediate fraction congeals.