Boiler feed-water system, boiler provided with said system, and boiler feed-water method
A boiler water supply and water supply technology, which is applied in the field of boiler water supply systems, can solve problems such as the inability to solve the evaporation of economizers, and achieve the effect of preventing evaporation
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no. 1 Embodiment approach 〕
[0042]In the present embodiment, the marine auxiliary boiler is described as an example, but the marine main boiler may also be used. Marine auxiliary boilers are boilers that are mounted on ships and meet the heating needs of the ships. For example, as a power source and heating medium for steam-driven equipment in ships, it is also used for heating hot water for kitchens and supplying steam and inert gas required for loading and unloading pumps on tankers. In addition, the marine auxiliary boiler is also used for heating fuel that needs to be heated (for example, fuel for an internal combustion engine, etc.), reducing the viscosity of the fuel, and the like. A marine main boiler is a boiler that supplies steam to a steam turbine, etc. of a steam-powered ship.
[0043] The marine auxiliary boiler of this embodiment can be applied to various offshore floating equipment (for example, offshore floating production / storage / offloading equipment (FPSO: Floating Production Storage a...
no. 2 Embodiment approach 〕
[0086] Below, use figure 1 and image 3 A second embodiment of the present invention will be described. The boiler feed water system according to the second embodiment differs from the first embodiment in that the flow rates of the first path and the third path are adjusted. Hereinafter, description common to the first embodiment will be omitted, and different contents will be mainly described.
[0087] In the first embodiment, when the full amount of water from the water supply inlet flows to one of the first path 10a and the third path 10c, the flow rate of the other is set to zero (the valve is completely closed), but in this embodiment , obtain the design conditions in advance, set the allocation amount of the first path 10a and the third path 10c, and operate with the set allocation amount.
[0088] The controller 13 adjusts the distribution of the amount of water flowing through the first path 10a and the amount of water flowing through the third path 10c based on the...
no. 3 Embodiment approach 〕
[0093] Below, use Figure 4 A third embodiment of the present invention will be described. The boiler feed water system according to the third embodiment is different from the first embodiment and the second embodiment in that the temperature of feed water is controlled. Hereinafter, description common to the first embodiment and the second embodiment will be omitted, and different contents will be mainly described.
[0094] In the case where the furnace of the auxiliary boiler 2 uses a fuel that does not contain corrosive components such as sulfides (for example, liquefied gas fuel such as LNG (Liquefied Natural Gas)), the problem of sulfuric acid corrosion of the economizer 4 for feedwater heating does not occur, so The feedwater temperature at the inlet of the feedwater heating economizer 4 can be set to a second predetermined temperature (eg, 100°C to 135°C) lower than the temperature (eg, 135°C) when using fuel containing corrosive components.
[0095] In this embodimen...
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