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

Abstract

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.

Description

technical field [0001] The invention belongs to the technical field of steam turbines, and relates to a device for starting an intermediate-pressure cylinder with adjacent steam for a unitary unit, and also relates to a method for starting the device. Background technique [0002] For a long time, during the maintenance of large-scale unit units, it has often occurred that the maintenance schedules of boilers and steam turbines cannot be well coordinated. It is often because the steam turbines are overhauled and the results of the maintenance are urgently needed to be inspected or the on-site work (such as dynamic balance, etc.) is required to drive the rotor to rotate. ) and the boiler fails to ignite for some reason. However, when the boiler was overhauled and then ignited and the steam turbine was started, it was found that the overhaul effect of the steam turbine was not good and required rework, which delayed the construction period. The overhaul period of the unit is ...

AI Technical Summary

Problems solved by technology

In the design of large-scale thermal power plant unit units, adjacent units cannot be switched to each other. When the main equipment in a unit fails to operate, the entire unit can only be shut down. The poor operation flexibility results in the short maintenance period of steam turbine boilers. The main reason for the good coordination

[0003] Judging from the implementation of the unit, from the ignition of the boiler to the end of the electrical test, it takes about 60 hours, consumes about 300 tons of fuel oil, and costs 2.4 million yuan per unit; at the same time, the boiler starts the fan, the steam turbine starts the electric water pump, and the unit starts Power consumption of the factory: (6300+3000+1700)*60=660000kw.h / set, the consumption cost is 330,000 yuan / set, and the total consumption cost is 2.73 million yuan / set, which is expensive

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