KR20170059255A - Offshore structure - Google Patents

Abstract

There is provided a marine structure in which the temperature and / or the humidity of the intake air is adjusted to provide the gas generation module to increase the power generation efficiency. Such a marine structure includes a liquefied gas storage tank for storing liquefied gas; A regeneration module for regenerating the liquefied gas transferred from the liquefied gas storage tank to generate gaseous fuel; An intake air treatment module for heat-exchanging the gaseous fuel and the cooling material, lowering the temperature of the intake air using the heat-exchanged cooling material, and providing the treated air to the treated air; A gas generating module that compresses the process air and generates electricity while burning the gas fuel into the compressed process air; And a steam generating module generating steam by using waste heat of the exhaust gas discharged from the gas generating module and generating electricity using the generated steam.

Description

Offshore structure

The present invention relates to a marine structure capable of combined power generation using liquefied gas as fuel.

Especially, as the environmental regulation condition is strengthened recently, a combined thermal power plant having high performance and reliability with less emission of pollution is often used compared with coal thermal power and nuclear power generation.

Such combined-cycle power generation includes, for example, a gas turbine and a steam turbine. In order to increase the efficiency of the system, the combined cycle power plant generates electricity by rotating the gas turbine with the high-temperature combustion gas generated by burning the fossil fuel first, and thereafter, the combustion gas (exhaust gas) The batch recovery boiler produces steam, which is then used to turn the steam turbine to produce secondary power.

Korean Registration Bulletin 10-1397621 (registered on May 14, 2014)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a marine structure in which the temperature and / or the humidity of the intake air is adjusted to provide the gas generation module to increase power generation efficiency.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a liquefied gas storage tank for storing a liquefied gas; A regeneration module for regenerating the liquefied gas transferred from the liquefied gas storage tank to generate gaseous fuel; An intake air treatment module for heat-exchanging the gaseous fuel and the cooling material, lowering the temperature of the intake air using the heat-exchanged cooling material, and providing the treated air to the treated air; A gas generating module that compresses the process air and generates electricity while burning the gas fuel into the compressed process air; And a steam generating module generating steam by using waste heat of the exhaust gas discharged from the gas generating module and generating electricity using the generated steam.

The intake air processing module may further include a humidity controller for absorbing the intake air.

The humidity controller includes a molecular sieve.

The intake air treatment module increases the temperature of the drying air using the steam generated from the steam power generation module and removes the moisture adsorbed by the humidity controller using the drying air.

The regeneration module regenerates the liquefied gas transferred in the liquefied gas storage tank and the boil off gas generated in the liquefied gas storage tank.

And a temperature control module for raising the temperature of the gaseous fuel generated by the regeneration module and transferring the gaseous fuel generated by the regeneration module to the gas generation module using the steam generated from the steam generation module.

The heat-exchanged cooling material may be provided to the steam generating module and used to cool the condensed water in the steam generating module.

And a desalination module for desalinating seawater using the steam generated from the steam generating module as a heat source.

And a waste heat recovery module for recovering waste heat from the exhaust gas discharged from the steam power generation module.

According to another aspect of the present invention, there is provided a liquefied gas storage tank for storing a liquefied gas; A regeneration module for regenerating the liquefied gas transferred from the liquefied gas storage tank to generate gaseous fuel; An intake air processing module for performing heat exchange between the gaseous fuel and the intake air, and using the heat exchange to lower the temperature of the intake air at the first temperature to the processing air at the second temperature; A gas generating module for compressing the process air and generating electricity while burning the heat exchanged gaseous fuel with the compressed process air; And a steam generating module for generating steam by using waste heat of the exhaust gas discharged from the gas generating module and generating electricity using the generated steam.

The gaseous fuel provided in the regeneration module is transferred to the steam generation module so that condensate in the steam generation module can be used to cool the cooling water.

The details of other embodiments are included in the detailed description and drawings.

1 is a view for explaining a marine structure according to a first embodiment of the present invention.
2 is an exemplary diagram of the re-encoding module of FIG.
Figure 3 is an exemplary diagram of the intake air treatment module of Figure 1;
Figure 4 is an exemplary diagram of the steam generator module of Figure 1;
5 is a view for explaining a marine structure according to a second embodiment of the present invention.
6 is a view for explaining a marine structure according to a third embodiment of the present invention.
7 is a view for explaining a marine structure according to a fourth embodiment of the present invention.
8 is a view for explaining a marine structure according to a fifth embodiment of the present invention.
9 is a view for explaining a marine structure according to a sixth embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

It is to be understood that when an element or layer is referred to as being "on" or " on "of another element or layer, All included. On the other hand, a device being referred to as "directly on" or "directly above" indicates that no other device or layer is interposed in between.

The terms spatially relative, "below", "beneath", "lower", "above", "upper" May be used to readily describe a device or a relationship of components to other devices or components. Spatially relative terms should be understood to include, in addition to the orientation shown in the drawings, terms that include different orientations of the device during use or operation. For example, when inverting an element shown in the figures, an element described as "below" or "beneath" of another element may be placed "above" another element. Thus, the exemplary term "below" can include both downward and upward directions. The elements can also be oriented in different directions, so that spatially relative terms can be interpreted according to orientation.

Although the first, second, etc. are used to describe various elements, components and / or sections, it is needless to say that these elements, components and / or sections are not limited by these terms. These terms are only used to distinguish one element, element or section from another element, element or section. Therefore, it goes without saying that the first element, the first element or the first section mentioned below may be the second element, the second element or the second section within the technical spirit of the present invention.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. A description thereof will be omitted.

1 is a view for explaining a marine structure according to a first embodiment of the present invention.

Referring to FIG. 1, a marine structure according to a first embodiment of the present invention includes a liquefied gas storage tank 100, a regeneration module 200, an intake air treatment module 300, a gas generation module 400, A module 500, a temperature control module 700, and the like.

The liquefied gas storage tank 100 may store a liquefied gas, for example, LNG (liquid natural gas). The liquefied gas is not limited to LNG, and any gas that can be used as fuel for the gas generating module 400 is possible.

The regeneration module 200 regenerates the liquefied gas (LNG) transferred from the liquefied gas storage tank 100 to generate the gaseous fuel (LTNG). In addition, the boil-off gas (BOG) generated in the liquefied gas storage tank 100 can be compressed and regenerated to generate gaseous fuel (LTNG). In addition, sea water (LTSW) can be received through the seachest and used for regasification, and used seawater (HTSW) can be exported to the outside. Because the sea water (LTSW) is used, the heat source can be used at low cost.

The intake air treatment module 300 includes a coolant heat exchanger 600 in which the gaseous fuel LTNG and the coolant HTCM are heat exchanged and the heat exchanged coolant LTCM , The temperature of the intake air (RawAir) is lowered to provide the treated air (TreatedAir).

Gas fuel (LTNG) is regenerated low temperature and high pressure gas. Since the cooling material (HTCM) can be cooled by using the gaseous fuel (LTNG), the energy required for cooling can be reduced.

However, the gas fuel (LTNG) can be directly used for cooling the intake air (RawAir), but the gas piping can be lengthened. The indirect cooling method is used because it is dangerous to extend the piping of the combustible gas flowing the gaseous fuel (LTNG).

In addition, the cooled (i.e., heat exchanged) cooling material LTCM may be delivered to the steam generating module 500 (see LC1). May be used to cool the condensate (CDS) in the steam generator module 500. The cooling material (HTCM) used in the steam generating module 500 may be transmitted to the intake air processing module 300 again (see HC1).

In addition, the intake air treatment module 300 may further include a humidity controller for absorbing the intake air RawAir. The humidity controller may include, for example, a molecular sieve. The intake air treatment module 300 uses steam (STM) to raise the temperature of the drying air (the air may be separately received from the outside, or a part of the intake air (RawAir) or the treated air (TreatedAir) may be used) It is possible to remove the moisture adsorbed on the microsphere. However, this steam (STM) may be generated in the steam generating module 500 (refer to S1). In order to remove moisture from the intake air treatment module 300, the humidity controller can be operated at a low cost since no separate steam is generated and used. The condensed water (CDS) made of the steam (STM) used may be supplied to the steam generating module 500 again (see C1).

The reason for this dehydration process is that the gas turbine and the compressor (Air Compressor) in the gas generating module 400 are vulnerable to droplets and salt. Since the offshore structures are operated in open sea, high humidity and cooling processes can produce droplets. In addition, a significant amount of in-air salinity is also treated by this dehydration process. In addition, in the case of the humidifier, the density is lower than that of the actual dry air, so that the relatively inflow mass flow rate is lowered. Therefore, it is necessary to properly dry (dehydrate) the intake air RawAir.

The gaseous fuel (LTNG or MTNG) may be delivered directly to the gas generation module 400. Alternatively, if the temperature of the gaseous fuel (LTNG or MTNG) is not sufficiently high, the temperature control module 700 uses the steam (STM) generated in the steam generating module 500 or MTNG) can be made into hot gaseous fuel (HTNG).

The gas generating module 400 compresses the treated air TreatedAir processed by the intake air processing module 300 and generates electricity by burning the gaseous fuel HTNG into compressed treated air TreatedAir. The gas generation module 400 can minimize the generation of contaminants by using gaseous fuel (HTNG) regenerated from the liquefied gas.

The steam generating module 500 generates steam by using the waste heat of the exhaust gas (HTEG) discharged from the gas generating module 400, and generates steam by using the generated steam.

Although not shown separately in FIG. 1, it is apparent that the marine structure according to the first embodiment of the present invention includes a pump, a compressor valve, and the like necessary for liquid / gas transportation and operation.

2 is an exemplary diagram of the re-encoding module of FIG.

Referring to FIG. 2, the regeneration module 200 may include a compressor 210, a recondenser 220, a pressurization pump 230, a vaporizer 240, and the like.

The compressor 210 compresses the boil-off gas (BOG) generated in the liquefied gas storage tank 100. Re-condenser 220 mixes and liquefies liquefied gas (LNG) with compressed boil-off gas (BOG). The pressurizing pump 230 compresses and transports liquefied boil-off gas (BOG) and liquefied gas (LNG) in the recondenser 220. The regenerator 240 heats the compressed fuel in the booster pump 230. Here, the regenerator 240 can receive the seawater (LTSW) through the seachest and use it for regasification, and can export the seawater (HTSW) to the outside. Because the sea water (LTSW) is used, the heat source can be used at low cost.

Figure 3 is an exemplary diagram of the intake air treatment module of Figure 1;

Referring to FIG. 3, the intake air treatment module 300 includes a temperature controller 310, a humidity controller 320, and the like.

The temperature controller 310 lowers the temperature of the intake air (RawAir) using the heat-exchanged cooling material (LTCM). As described above, the heat exchanged cooling material (LTCM) may be cooled using regenerated low temperature, high pressure gaseous fuel (LTNG).

The humidity controller 320 lowers or removes the humidity of the intake air RawAir. The humidity controller 320 may include, for example, a molecular sieve. The intake air treatment module 300 may use steam to increase the temperature of the air (either separately receiving air from the outside, or using a part of intake air (RawAir) or treated air (TreatedAir)), It is possible to remove the moisture adsorbed on the wall. However, this steam (STM) may be generated in the steam generating module 500.

Figure 4 is an exemplary diagram of the steam generator module of Figure 1;

Referring to FIG. 4, the steam generating module 500 includes a steam generator 510, a steam turbine 520, a steam condenser 530, and the like.

The steam generator 510 generates steam (STM) and exhausts the exhaust gas (LTEG) using the waste heat of the exhaust gas (HTEG) provided in the gas generating module 400. The generated steam (STM) is supplied to the steam turbine 520. Also, the steam STM may be delivered to the intake air treatment module 300 (see reference numeral S1) and may be transmitted to the temperature control module 700 (refer to reference numeral S2).

The steam turbine 520 generates steam using steam (STM). The condensed water (CDS) generated after the power generation is transferred to the steam condenser 530. The condensed water (CDS) generated in the intake air processing module 300 and the condensed water (CDS) generated in the temperature control module 700 are also transferred to the steam condenser 530 (refer to C1 and C2).

The steam condenser 530 cools the delivered condensed water (CDS). At this time, the cooled (ie, heat-exchanged) cooling material (LTCM) provided by the intake air processing module 300 can be used (see LC1 and HC1).

5 is a view for explaining a marine structure according to a second embodiment of the present invention. For convenience of explanation, the differences from those described with reference to Figs. 1 to 4 will be mainly described.

Referring to FIG. 5, low temperature and high pressure gaseous fuel (LTNG) provided in the regeneration module 200 is directly used for cooling the intake air (RawAir). That is, a direct cooling method can be used. That is, there may be no cooling material heat exchanger (600 of FIG. 1).

The gaseous fuel (HTNG) used in the intake air (RawAir) cooling may be provided to the temperature control module 700 (see HG2). That is, the gaseous fuel (HTNG) used for cooling the intake air (RawAir) can be introduced into the main pipe through which the gaseous fuel (LTNG) flows.

Alternatively, when it is difficult to flow into the main pipe, it may be returned to the liquefied gas storage tank 100 through a PR valve.

The low temperature and high pressure gaseous fuel LTNG provided in the regeneration module 200 is transferred to the steam generation module 500 (refer to LG1) to cool the condensed water (CDS) in the steam generation module 500 Can be used. The gaseous fuel (HTNG) used to cool the condensate (CDS) may again be provided to the temperature control module 700 (see HG1). That is, the gaseous fuel (HTNG) used to cool the condensed water (CDS) can flow into the main pipe through which the gaseous fuel (LTNG) flows.

6 is a view for explaining a marine structure according to a third embodiment of the present invention. For convenience of explanation, the differences from those described with reference to Figs. 1 to 4 will be mainly described.

Referring to FIG. 6, the desalination module 800 may be connected to the steam generating module 500. The desalination module 800 is used to replenish fresh water (i.e., steam or condensed water) lost in the steam generating module 500. The desalination module 800 desalinates seawater (LTSW) using steam (STM) generated in the steam generating module 500 as a heat source. The generated fresh water is used as steam or condensate.

7 is a view for explaining a marine structure according to a fourth embodiment of the present invention. 8 is a view for explaining a marine structure according to a fifth embodiment of the present invention. For convenience of explanation, the differences from those described with reference to Figs. 1 to 4 will be mainly described.

Referring to FIG. 7, an exhaust gas processing module 910 for processing the exhaust gas (LTEG) discharged from the steam generating module 500 may be additionally installed. The exhaust gas treatment module 910 may remove or reduce various contaminants that may be contained in the exhaust gas (LTEG).

Referring to FIG. 8, a waste heat recovery module 920 for recovering low temperature waste heat from exhaust gas (LTEG) discharged from the steam generating module 500 may be additionally installed.

9 is a view for explaining a marine structure according to a sixth embodiment of the present invention. For convenience of explanation, the differences from those described with reference to Figs. 1 to 4 will be mainly described.

9, in the marine structure according to the first embodiment of the present invention, only the power generated from the gas generating module 400 and the steam generating module 500 is provided through the first terminal 940, The marine structure according to the sixth embodiment of the present invention can also provide the gas generated through the second terminal 930. [

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

100: liquefied gas storage tank 200: regasification module
300: Intake air treatment module 400: Gas power generation module
500: steam generator module 700: temperature control module

Claims (10)

A liquefied gas storage tank for storing liquefied gas;
A regeneration module for regenerating the liquefied gas transferred from the liquefied gas storage tank to generate gaseous fuel;
An intake air treatment module for heat-exchanging the gaseous fuel and the cooling material, lowering the temperature of the intake air using the heat-exchanged cooling material, and providing the treated air to the treated air;
A gas generating module that compresses the process air and generates electricity while burning the gas fuel into the compressed process air; And
And a steam generating module for generating electricity based on steam generated by waste heat of the exhaust gas discharged from the gas generating module. The method according to claim 1,
Wherein the intake air processing module further comprises a humidity controller for absorbing the intake air. 3. The method of claim 2,
Wherein the intake air processing module increases the temperature of the drying air by using the steam generated from the steam generating module and removes the moisture adsorbed by the humidity controller using the drying air. The method according to claim 1,
Wherein the regeneration module regenerates the liquefied gas transferred in the liquefied gas storage tank and the boil off gas generated in the liquefied gas storage tank. The method according to claim 1,
Further comprising a temperature control module for increasing the temperature of the gaseous fuel generated by the regeneration module and transferring the gaseous fuel generated by the regeneration module to the gas generation module using the steam generated from the steam generation module. The method according to claim 1,
Wherein the heat exchanged cooling material is provided to the steam generating module to cool the condensed water in the steam generating module. 7. The method according to claim 1 or 6,
And a desalination module for desalinating seawater using steam generated from the steam generating module as a heat source. The method according to claim 1,
And a waste heat recovery module for recovering waste heat from the exhaust gas discharged from the steam power generation module. A liquefied gas storage tank for storing liquefied gas;
A regeneration module for regenerating the liquefied gas transferred from the liquefied gas storage tank to generate gaseous fuel;
An intake air processing module for performing heat exchange between the gaseous fuel and the intake air, and using the heat exchange to lower the temperature of the intake air at the first temperature to the processing air at the second temperature;
A gas generating module for compressing the process air and generating electricity while burning the heat exchanged gaseous fuel with the compressed process air; And
And a steam generating module for generating steam by using waste heat of the exhaust gas discharged from the gas generating module and generating steam using the generated steam. 10. The method of claim 9,
Wherein the gaseous fuel provided in the regeneration module is transferred to the steam generation module, and the condensed water in the steam generation module is used to cool the cooling water.

Images