Char discharge unit, char recovery unit including char discharge unit, char discharge method, and integrated gasification combined cycle

A char discharge unit for discharging char discharged from a filtration unit into a char storage unit in which a pressure is at least temporarily higher pressure than that in the filtration unit, the char discharge unit comprising:

• a char discharge line connected to a lower side of the filtration unit in a vertical direction and connected to the char storage unit;
• a lock hopper installed at an intermediary point of the char discharge line to temporarily store the char;
• an admission valve installed in the char discharge line between the lock hopper and the filtration unit;
• a control valve installed in the char discharge line between the lock hopper and the char storage unit;
• and
• a control device configured to close the control valve when the admission valve is open, and to close the admission valve when the control valve is open, wherein
• the control valve includes
• a gate valve configured to switch between starting and stopping a flow of the char through the char discharge line;
• and
• a dispensing valve disposed closer to the char storage unit than the gate valve to switch sealing gas inside the char discharge line.