JP3584477B2 - Boiler power generation equipment - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a boiler power generation facility.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a power generation facility for generating electric power by using high-pressure steam generated in a boiler, for example, there is one as shown in FIG. 2, which generates steam generated in a boiler 1 to which fuel and air are supplied by a steam turbine 2. The steam drives the steam turbine 2 and turns the generator 3 to generate electric power. The steam that drives the steam turbine 2 is returned to water by the condenser 4, and the water is returned by the condensate pump 5. The water treated by the condensate desalination unit 6 is pressurized by a condensate booster pump 7 and heated by a low-pressure water heater 8 to degas. After degassing in the boiler 9, the pressure is raised by the boiler feed water pressure pump 10 and sent to the high pressure feed water heater 11, and the water heated by the high pressure feed water heater 11 is sent to the boiler 1.
[0003]
On the other hand, the exhaust gas discharged from the boiler 1 is purified by removing sulfur oxides in a desulfurizer 12 to which an absorbent such as calcium carbonate and make-up water are supplied, and then discharged to the atmosphere from a chimney 13. In addition, by-products such as gypsum are collected from the desulfurization device 12, and a part of water used for desulfurization is treated as wastewater.
[0004]
Cooling water cooled by the cooling water tower 14 and pressurized by the pump 15 is supplied to the condenser 4 and circulated for cooling the steam that drives the steam turbine 2. If the cooling water is simply circulated, impurities such as calcium contained in the cooling water precipitate and adhere to the heat transfer tubes of the condenser 4, causing a decrease in heat efficiency or adversely affecting the heat transfer tubes. For example, part of the cooling water is discharged as effluent water, and makeup water is supplied to the cooling water tower 14.
[0005]
[Problems to be solved by the invention]
However, boiler power generation facilities constructed overseas are often installed in an inland area without a river, and in such a case, it is extremely difficult to secure make-up water to the desulfurization unit 12. Was.
[0006]
The present invention has been made in view of the above circumstances, and has as its object to provide a boiler power generation facility capable of securing supply water to a desulfurization device even in an area with little water.
[0007]
[Means for Solving the Problems]
The present invention provides a steam turbine that drives a generator, a boiler that supplies steam to the steam turbine, a condenser that cools and condenses steam that drives the steam turbine, and exhaust gas discharged from the boiler. A desulfurization device to which an absorbent and make-up water are supplied to remove sulfur oxides; and a part of discharge water discharged to the outside after cooling the steam by the condenser as supply water to the desulfurization device. And a piping system that performs the operation.
[0008]
[Action]
Accordingly, the steam heated by the boiler is introduced into a steam turbine, and the steam turbine is driven by the steam to generate power by a generator.The steam that has driven the steam turbine is returned to water by a condenser and is returned to the water. After being sent to the boiler, the desulfurizer cools the steam in the condenser, then discharges part of the effluent discharged to the outside as supply water from the piping system, and also supplies the absorbent. The exhaust gas discharged from the boiler and introduced into the desulfurization device is discharged into the atmosphere after the sulfur oxides are removed in the desulfurization device to form a clean gas.
[0009]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
FIG. 1 shows an embodiment of the present invention. In the drawing, portions denoted by the same reference numerals as those in FIG. 2 represent the same components, and the basic configuration is the same as the conventional one shown in FIG. However, the feature of the present embodiment is that, as shown in FIG. 1, after the steam is cooled by the condenser 4, a part of the effluent discharged to the outside is supplied to the desulfurizer 12 as makeup water. The point is that the system 16 is provided.
[0011]
With the configuration as described above, the steam heated by the boiler 1 is introduced into the steam turbine 2, and the steam turbine 2 is driven by the steam to generate power by the generator 3. The steam that drives the steam turbine 2 is The water is returned to the water by the condenser 4, and the water is pumped to the condensate and desalination device 6 by the condensate pump 5 to perform desalination and impurity removal. After being pressurized by the condensate booster pump 7 and heated by the low-pressure feedwater heater 8 and deaerated by the deaerator 9, the pressure is increased by the boiler feedwater booster pump 10 and fed to the high-pressure feedwater heater 11. The water heated by the heater 11 is supplied to the boiler 1, while the desulfurizer 12 cools the steam by the condenser 4, and then discharges part of the discharged water discharged outside to the piping system 16. Supplied as make-up water, and an absorbent such as calcium carbonate The exhaust gas that has been supplied and discharged from the boiler 1 and introduced into the desulfurization device 12 is subjected to removal of sulfur oxides in the desulfurization device 12 to become a clean gas, and then discharged from the chimney 13 to the atmosphere. By-products such as gypsum are collected from the desulfurization unit 12, and a part of water used for desulfurization is treated as wastewater.
[0012]
In this way, even in the case of a boiler power generation facility constructed overseas or the like, which is installed in an inland area without a river, it is possible to secure supply water to the desulfurization device 12.
[0013]
Note that the boiler power generation equipment of the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the gist of the present invention.
[0014]
【The invention's effect】
As described above, according to the boiler power generation equipment of the present invention, it is possible to obtain an excellent effect that it is possible to secure replenishment water for the desulfurization device even in an area with little water.
[Brief description of the drawings]
FIG. 1 is an overall schematic diagram of an embodiment of the present invention.
FIG. 2 is an overall schematic diagram illustrating an example of a conventional boiler power generation facility.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Boiler 2 Steam turbine 3 Generator 4 Condenser 12 Desulfurization device 16 Piping system

Claims (1)

A steam turbine for driving the generator, a boiler for supplying steam to the steam turbine, a condenser for cooling and condensing the steam for driving the steam turbine, and sulfur oxides from exhaust gas discharged from the boiler. A desulfurization device to which an absorbent and makeup water are supplied for removal , and a piping system for supplying a part of the discharge water discharged to the outside after cooling the steam with the condenser as makeup water to the desulfurization device. A boiler power generation facility comprising:

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