The following safety evacuation design scheme for main building of thermal power plant is incorrect ().

According to the Standard for Fire Protection Design of Thermal Power Plants and Substations (5. 1. 1), there should be no less than two safety exits in the steam turbine room, deoxygenating room, coal bunker room, boiler room and centralized control building. The above-mentioned fire exits can use Class B fire doors leading to adjacent workshops as the second fire exits, but there must be at least 1 fire exits at the bottom of each workshop. 5. 1.2 The distance from the farthest working place of the steam turbine room, deoxygenating room, coal bunker room and boiler room to the emergency exit or evacuation stairs directly leading to the outside should not be greater than 75m；; The distance from the farthest working place of the centralized control building to the emergency exit or stairwell directly outside should not be more than 50m. 5. 1.3 The main workshop should have at least 1 closed stairs that can lead to all floors and roofs and directly to the outside, and other evacuation stairs can be open stairs; The centralized control building shall be provided with at least 1 closed stairwells leading to all floors.