A reactor system for fouling prevention in the production of ethylene dichloride comprising - at least one direct chlorination reactor in the production of 1,2-dichlor ethane, - at least one ethylene ejector and chlorine ejector which enable raw material input for reaction in the production of 1,2-dichlor ethane, - at least one condenser which enables to condense the gas outgoing from the reactor, - at least one EDC separator which separates the EDC outgoing from the reactor, - at least one vent gas condenser which enables the gas coming from the EDC separator to condense, - at least one EDC collecting drum wherein the ethylene dichloride outgoing from the condenser accumulates, - at least one catalyst loading pot which provides catalyst in order to be used in reaction of the ethylene and the chlorine in the reactor, - at least one EDC line which goes to the ethylene stripper column from the EDC collecting drum, - at least one circulation and catalyst loading pump which pumps catalyst to the catalyst loading pot, - at least one ethylene stripper which enables the ethylene outgoing from the EDC collecting drum to separate, - at least one EDC tank wherein the obtained pure ethylene dichloride accumulates, - at least one EDC line which conveys the pure EDC to the cracking furnace, - at least one EDC cracking unit which enables the EDC outgoing from the EDC tank to decompose, - at least one EDC recycle line which sends the EDC outgoing from the EDC cracking unit to the pure EDC tank characterized by - at least one circulation and catalyst loading pump EDC line which conveys the line entering the ethylene stripper column to the circulation and catalyst loading pump and enables to prevent fouling in the production of ethylene dichloride. - at least one direct chlorination reactor in the production of 1,2-dichlor ethane, - at least one ethylene ejector and chlorine ejector which enable raw material input for reaction in the production of 1,2-dichlor ethane, - at least one condenser which enables to condense the gas outgoing from the reactor, - at least one EDC separator which separates the EDC outgoing from the reactor, - at least one vent gas condenser which enables the gas coming from the EDC separator to condense, - at least one EDC collecting drum wherein the ethylene dichloride outgoing from the condenser accumulates, - at least one catalyst loading pot which provides catalyst in order to be used in reaction of the ethylene and the chlorine in the reactor, - at least one EDC line which goes to the ethylene stripper column from the EDC collecting drum, - at least one circulation and catalyst loading pump which pumps catalyst to the catalyst loading pot, - at least one ethylene stripper which enables the ethylene outgoing from the EDC collecting drum to separate, - at least one EDC tank wherein the obtained pure ethylene dichloride accumulates, - at least one EDC line which conveys the pure EDC to the cracking furnace, - at least one EDC cracking unit which enables the EDC outgoing from the EDC tank to decompose, - at least one EDC recycle line which sends the EDC outgoing from the EDC cracking unit to the pure EDC tank characterized by - at least one circulation and catalyst loading pump EDC line which conveys the line entering the ethylene stripper column to the circulation and catalyst loading pump and enables to prevent fouling in the production of ethylene dichloride.