Device for starting intermediate-pressure cylinder device by using neighbor turbine steam in unitized unit and starting method thereof

The invention discloses a device for starting an intermediate-pressure cylinder device by using neighbor turbine steam in a unitized unit and a starting method of the device for starting the intermediate-pressure cylinder device. The device comprises a native turbine and a neighbor turbine, a steam source is injected to a turbine intermediate-pressure cylinder through a native turbine auxiliary steam header on the native turbine and a boiler reheater connected with the native turbine auxiliary steam header, and the steam source is provided by a neighbor turbine auxiliary steam header communicated with the native turbine auxiliary steam header through a pipeline. The neighbor turbine steam source is connected to the intermediate-pressure cylinder through a pipeline to start the native turbine intermediate-pressure cylinder, a native turbine boiler, a starting fan and an electric feed pump do not need to work, house supply and fuel can be saved, the on-site work of inspecting the quality after an overhaul of the turbines and driving a rotor to rotate is completed, impulse starting, installation quality inspection and no-load tests on an electric part before grid connection of the unit can be carried out ahead of time, running operation and the maintenance workload in the period are reduced, and disharmony between the overall duration of the boiler and the overall duration of the turbines can be relieved, so that energy conservation and consumption reduction are achieved, the unit is high in economy, reliability and utilization ratio, the starting method is easy and convenient, and operation is safe and reliable.