Reaction system and cleaning method

A cleaning method of a reaction system which comprises:

• a partition wall capable of blocking indoor air from outdoor air;
• a reactor that is a cylindrical body provided in a sealed space covered by the partition wall and including a supply port of a substance to be treated and a delivery port of a product;
• a conveyance apparatus that conveys the substance to be treated inside the cylindrical body inside the cylindrical body;
• a fluid supply tube connected to a fluid inlet provided in the reactor for supplying a fluid for production;
• and
• a fluid discharge tube that discharges a fluid inside the reactor from a fluid outlet provided in the reactor,
• the reaction system capable of executing a producing step of producing a predetermined product from the substance to be treated, the cleaning method comprising:
• injecting a cleaning medium to the reactor from at least any one of the supply port or the fluid supply tube as a cleaning step;
• and
• discharging at least any one of a fluid or a discharge generated as a result of the cleaning medium being injected from at least any one of the fluid discharge tube or the delivery port.