JP2016156516A5

JP2016156516A5 -

Info

Publication number: JP2016156516A5
Application number: JP2015032868A
Authority: JP
Filing date: 2015-02-23
Publication date: 2016-10-13
Anticipated expiration: 2035-02-23

Claims

A burner that burns in the furnace,
An evaporator that generates steam from the combustion gas generated by the burner;
A superheater that is disposed closer to the furnace than the evaporator and that generates superheated steam by superheating the steam generated by the evaporator;
Steam temperature adjusting means for adjusting the steam temperature when returning the steam taken out from the steam take-out part in the middle of the superheater to the steam return part of the superheater;
A control unit for controlling the steam temperature adjusting means;
A first temperature sensor that measures a first steam temperature downstream of the steam flow from the steam return portion of the superheater and in the middle of the superheater;
The steam temperature adjusting means includes a heat sink that lowers the temperature of the introduced steam,
A flow rate adjusting means for a slow heat regulator that adjusts the flow rate of the steam flowing through the slow heat device;
With
The control unit includes superheater outlet temperature relationship information that defines a relationship between a superheater outlet temperature that is a steam temperature at the outlet of the superheater and the first steam temperature, the superheater outlet temperature relationship information, and The boiler, wherein the steam temperature adjusting means is controlled based on a measurement result of the first temperature sensor so that the superheater outlet temperature becomes a target value.

The steam temperature adjusting means bypasses the heat sink, a steam introduction path for guiding steam from the steam take-out section to the heat sink, a steam return path for returning steam from the heat sink to the steam return section, and the heat sink A slow-heater bypass path that connects the steam introduction path and the steam return path,
The flow adjuster for the heat sink is a first flow control valve provided on the upstream side of a junction between the first flow control valve provided in the heat sink bypass path and the steam return path and the heat sink bypass path. for example Bei and two flow rate control valve,
The boiler according to claim 1 , wherein a minimum opening degree of the first flow rate adjusting valve is a predetermined opening degree larger than zero .

A second temperature sensor for measuring the superheater outlet temperature;
Wherein, based on the second temperature sensor measurement results, according to claim 1 or 2, wherein the superheater outlet temperature and controls the steam temperature regulating means so that the target value boiler.

The superheater is installed on the upstream side of the steam flow, installed on the downstream side of the steam flow of the primary superheater, and installed behind the primary superheater with respect to the furnace. A secondary superheater,
With
The first steam temperature measured by said first temperature sensor, to claim 1, wherein 3 of that it is a steam temperature between the secondary superheater and the primary superheater The described boiler.

The superheater is installed on the upstream side of the steam flow, installed on the downstream side of the steam flow of the primary superheater, and installed behind the primary superheater with respect to the furnace. A secondary superheater,
With
The boiler according to any one of claims 1 to 4, wherein the steam temperature adjusting means is provided in the primary superheater.

A steam turbine that drives a thruster that generates thrust in water;
The boiler according to any one of claims 1 to 5 , wherein steam is supplied to the steam turbine;
A marine steam turbine propulsion system comprising:

A marine vessel comprising the marine steam turbine propulsion system according to claim 6 .

A combustion gas generation process for generating combustion gas;
A steam generation step of generating steam by the generated combustion gas;
A superheated steam generation step of superheating the generated steam and generating superheated steam in a superheater;
A superheated steam slow heating step of removing steam from a midway position of the superheater and returning the steam to the superheater after passing through a slow heat reducer that lowers the temperature of the steam;
A flow rate adjusting step for the slow heat generator that adjusts the flow rate of the steam flowing to the slow heat device by the flow rate adjusting means for the slow heat device;
A first steam temperature measuring step of measuring a first steam temperature at a midpoint of the superheater after passing through the superheated steam slow heating step;
Based on the superheater outlet temperature relationship information that defines the relationship between the superheater outlet temperature, which is the steam temperature of the superheater outlet, and the first steam temperature, and the measurement result of the first steam temperature measurement step, A superheater outlet temperature adjusting step for controlling the flow rate adjusting means for the slow heater so that the superheater outlet temperature becomes a target value;
A boiler control method comprising: