KR102462124B1 - Solar energy production device using fluidized bed process - Google Patents

Abstract

The present invention relates to a solar thermal chemical energy production apparatus using a fluidized bed process for maximizing the efficiency of using renewable energy by storing and resupplying solar heat in a solid material discharged from a fluidized bed combustion furnace. Solar thermal chemical energy production apparatus according to the present invention is a combustion furnace that burns fuel and circulates solid materials, a cyclone that collects and delivers solid materials from the combustion furnace, receives solid materials from the cyclone, and heats the solid materials through solar heat and a loop seal that circulates it to the fluidized bed combustion furnace.

Description

Solar energy production device using fluidized bed process

The present invention relates to an energy production device, and more particularly, to a solar thermal chemical energy production device using a fluidized bed process for maximizing renewable energy utilization efficiency by storing and resupplying solar heat in a solid material discharged from a fluidized bed combustion furnace. will be.

The general process of producing energy from solid hydrocarbon materials such as coal/biomass/waste is a combustion process that obtains heat by reacting with air or oxygen, or air pollutants such as sulfur oxides/nitrogen oxides and greenhouse gases including carbon dioxide. Since it is accompanied by inevitable emissions, conversion to renewable energy such as solar heat/solar power/wind power is required.

However, renewable energy such as solar power/solar heat/wind power has low energy reliability because energy production varies greatly depending on climatic conditions. As a method to solve this problem, hydrogen storage/large-capacity secondary batteries using water electrolysis have been developed, but it is still difficult to store electricity on a utility scale. Therefore, a new process that can reduce the emission of air pollutants and expand the use of renewable energy is needed at the same time.

Accordingly, Korean Patent Application Laid-Open No. 10-2012-0002739, Korean Patent Application Laid-Open No. 10-2013-0042017, and Korean Patent Publication No. 10-2007-0069379 disclose that the path of sunlight is changed or solar energy collected through a condensing lens is used. Although the content of delivery into the reactor is disclosed, it is manufactured so that only small-scale solar heat can be used in a house or building-scale building such as heating or hot water according to the use of water. Therefore, a new approach is required to overcome the intermittency of renewable energy.

In order to solve the above problems, an object of the present invention is to provide a solar thermal chemical energy production apparatus using a fluidized bed process for maximizing the efficiency of using renewable energy by storing and resupplying solar heat in the solid material discharged from the fluidized bed combustion furnace. have.

Solar thermal chemical energy production apparatus using a fluidized bed process according to the present invention is a combustion furnace that burns fuel and circulates a solid material, a cyclone that collects and delivers the solid material from the combustion furnace, and receives the solid material from the cyclone , characterized in that it comprises a loop seal that heats the solid material through solar heat and circulates it to the fluidized bed combustion furnace.

In the solar thermal chemical energy production apparatus using the fluidized bed process according to the present invention, the solid material comprises at least one of sand, alumina and silicon carbide (SiC).

In the solar thermal and chemical energy production apparatus using the fluidized bed process according to the present invention, the loop seal receives the solid material from the cyclone and forms a storage unit for storing the solid material, and the solid material stored in the storage unit by collecting sunlight It is characterized in that it comprises at least one light collecting unit for irradiating sunlight.

In the solar thermal chemical energy production apparatus using the fluidized bed process according to the present invention, the light collecting unit is a first reflector for collecting sunlight, a first lens for collecting sunlight reflected from the primary reflector, and from the first lens. It characterized in that it comprises a second reflecting plate for reflecting the concentrated sunlight to the storage unit, and a second lens for condensing the sunlight reflected from the second reflection plate to the storage unit.

In the solar thermal chemical energy production apparatus using the fluidized bed process according to the present invention, the first lens is a Fresnel lens.

In the solar thermal chemical energy production apparatus using the fluidized bed process according to the present invention, the second lens is a convex lens.

In the solar thermal chemical energy production apparatus using the fluidized bed process according to the present invention, the path of sunlight passing through the first reflecting plate and the second lens is characterized in that it coincides with the optical axis of the sunlight.

In the solar thermal chemical energy production apparatus using the fluidized bed process according to the present invention, the second reflector and the second lens are positioned on the same line as the solid material stored in the storage unit.

The solar energy production apparatus using the fluidized bed process according to the present invention can maximize the efficiency of using renewable energy by storing and resupplying solar heat in the solid material discharged from the fluidized bed combustion furnace.

1 is a view showing the configuration of an energy production device according to an embodiment of the present invention.
2 is a view showing a structure of a light collecting unit according to an embodiment of the present invention.
3 is a graph for explaining the concept of energy production using an energy production device according to an embodiment of the present invention.
4 is a graph showing the thermal efficiency stored in solid particles and gas by applying the energy production device according to an embodiment of the present invention.

Assignment number R18XA06-49 Research management institution Korea Electric Power Corporation Electric Power Research Institute Research project name External public offering basic research Research project name Development of basic source technology for a double fluidized bed process linked to solar energy storage for a non-edible biomass-based carbon reverse emission power plant Host institution Chonbuk National University Research period 2018. 05. 01 ～ 2021. 04. 30
It should be noted that, in the following description, only the parts necessary for understanding the embodiments of the present invention will be described, and descriptions of other parts will be omitted in the scope not disturbing the gist of the present invention.

The terms or words used in the present specification and claims described below should not be construed as being limited to their ordinary or dictionary meanings, and the inventors have appropriate concepts of terms to describe their invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined in Accordingly, the embodiments described in this specification and the configurations shown in the drawings are only preferred embodiments of the present invention, and do not represent all the technical spirit of the present invention, so various equivalents that can be substituted for them at the time of the present application It should be understood that there may be variations and variations.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a diagram showing the configuration of an energy production device according to an embodiment of the present invention, FIG. 2 is a diagram showing the structure of a light collecting unit according to an embodiment of the present invention, and FIG. 3 is a diagram showing energy according to an embodiment of the present invention It is a graph to explain the concept of energy production using a production device.

1 to 3 , the energy production apparatus 100 according to an embodiment of the present invention includes a combustion furnace 10 , a cyclone 20 , and a loop seal 30 .

The furnace 10 comprises a front wall, a rear wall and two side walls located therebetween. Here, the combustion furnace 10 is closed by upper and lower surfaces respectively located at the upper and lower portions.

In addition, the furnace 100 further includes a plate extending parallel to the lower surface on the lower surface. In this case, a plurality of holes are formed in the plate, and a plurality of nozzles corresponding to the holes are mounted on the plate. A space between the plate and the lower surface constitutes a gas chamber, and a fluidizing gas is supplied to the gas chamber from an external gas supply source.

Solid fuel, such as fossil fuel, biomass fuel, or the like, is supplied into the combustion furnace 10 through a fuel supply unit in the combustion furnace 10 . At this time, the combustion furnace 10 according to the embodiment of the present invention may be injected with a solid material. Here, the solid material may be injected into the combustion furnace 10 through a fuel supply or may be injected into the combustion furnace 10 separately from the solid fuel through another independent passage.

Here, the solid material according to an embodiment of the present invention may include at least one of sand, alumina, and silicon carbide (SiC).

In addition, the solid fuel and solid material injected into the combustion furnace 10 are fluidized by the gas ejected upward from the nozzles at the bottom of the combustion furnace 10 . Combustion of the solid fuel is started by a burner (not shown), and the fluidizing gas further promotes combustion of the solid fuel. A mixture of combustion gas produced by combustion of solid fuel and air heated by combustion (hereinafter referred to as 'exhaust gas') rises upward in the combustion furnace 10 by convection phenomenon and contains solid fuel and solid material Some of the solid particles are captured and discharged together with them out of the furnace 10 through an outlet formed in the upper portion of the furnace 10, for example, the rear wall. In particular, solid material may be transported into the cyclone 20 .

The cyclone 20 separates the solid material discharged from the combustion furnace 10 and the combustion exhaust gas. Although not shown, the separated combustion exhaust gas is discharged to the exhaust pipe, and the solid material may be delivered to the roof seal 30 of the lower side.

For example, the cyclone 20 may use centrifugal force generated when rotating the gas to separate the solid material and the combustion exhaust gas. That is, in the cyclone 20, the solid material and the combustion exhaust gas discharged from the combustion furnace 10 move downward spirally, so that the particles are moved to the wall of the periphery, and the solid material is precipitated to the bottom. Thereafter, the gas is discharged, and the solid material moves to the loop seal 30 .

The loop seal 30 may receive the solid material from the cyclone 20 , heat the solid material through solar heat, and circulate it to the combustion furnace 10 .

Here, the loop seal 30 includes a storage unit 31 having a space for receiving and storing the solid material received from the cyclone 20, and condensing sunlight to irradiate the solid material stored in the storage unit 31 with sunlight. It may be configured to include at least one light collecting part 32 .

That is, the loop seal 30 stores the solid material delivered from the cyclone 20 in the storage unit 31 , collects sunlight through the light collection unit 32 , and irradiates the solid material stored in the storage unit 31 . The solar heat is stored in the solid material, and the solid material in which the solar heat is stored can be recycled back to the combustion furnace 10 .

Here, the light collecting unit 32 includes a first reflecting plate 32a, a first lens 32b, a second reflecting plate 32c, and a second lens 32d.

The first reflector 32a is a portion that directly receives sunlight, and may receive sunlight and transmit it to the first lens 32b. For example, the first reflector 32a may be configured to be able to adjust the angle so as to receive as much sunlight as possible according to the position of the sun.

The first lens 32b may collect sunlight reflected from the primary reflector. The first lens 32b may be a Fresnel lens. Here, the Fresnel lens is a lens with a thin thickness while condensing like a convex lens. It is a lens constructed to have the same function. Therefore, when the first lens is used as a Fresnel lens, the overall size can be reduced compared to the case where a general convex lens is used.

The second reflecting plate 32c may reflect sunlight collected from the first lens 32b toward the roof seal 30 . The second reflecting plate 32c may be configured to be able to adjust an angle according to the position of the loop seal 30 and the position or shape of the second lens 32b.

The second lens 32d may condense sunlight reflected from the first reflector 32c into the storage unit 31 of the roof seal 30 . That is, the second lens 32b may finally irradiate sunlight onto the solid material stored in the storage unit 31 . Here, the second lens 32d may be a convex lens.

Meanwhile, a path of sunlight passing through the first reflector 32a and the second lens 32d may coincide with an optical axis of sunlight.

In addition, the second reflecting plate 32c and the second lens 32d may be positioned on the same line as the solid material stored in the storage unit 31 .

Meanwhile, FIG. 3 is a graph for explaining the concept of energy production using the energy production device according to the embodiment of the present invention, and FIG. 4 is the thermal efficiency stored in solid particles and gas by applying the energy production device according to the embodiment of the present invention. is a graph showing

3 and 4 , the first lens 32b, the second reflector 32c, and the second lens 32d through the first reflector 32a condense solar heat to the storage unit 31 . As a result, it was confirmed that the energy conversion efficiency was located between 5 and 22% depending on the size of the storage unit 31 , and it could be confirmed that solar heat was stored in the solid particles.

In addition, it can be confirmed that solar thermal energy can be stored in the fluidized bed medium, and stable energy production is possible when fused to the existing circulating fluidized bed combustion furnace.

As described above, the solar energy production apparatus using the fluidized bed process according to an embodiment of the present invention stores and resupply solar heat in the solid material discharged from the fluidized bed combustion furnace, thereby maximizing the efficiency of using renewable energy.

On the other hand, the embodiments disclosed in the present specification and drawings are merely presented as specific examples to aid understanding, and are not intended to limit the scope of the present invention. It is apparent to those of ordinary skill in the art to which the present invention pertains that other modifications based on the technical spirit of the present invention can be implemented in addition to the embodiments disclosed herein.

10: furnace 20: cyclone
30: loop seal 31: light collecting part
31a: first reflector 31b: first lens
31c: second reflector 31d: second lens
32: storage unit 100: energy production device

Claims (8)

a furnace that burns fuel and circulates solid material;
a cyclone that collects and delivers the solid material from the furnace;
A loop seal that receives the solid material from the cyclone, heats the solid material through solar heat and circulates it to the combustion furnace; and
The solid material comprises at least one of alumina and silicon carbide (SiC),
The loop seal is
a storage unit having a space for receiving and storing the solid material from the cyclone;
at least one light collecting unit for condensing sunlight and irradiating sunlight to the solid material stored in the storage unit;
Solar thermal chemical energy production device using a fluidized bed process comprising a. delete delete According to claim 1,
The light collecting unit,
a first reflector for collecting sunlight;
a first lens condensing sunlight reflected from the first reflector;
a second reflector for reflecting sunlight collected from the first lens to the storage unit;
a second lens condensing sunlight reflected from the second reflector to the storage unit;
Solar thermal chemical energy production device using a fluidized bed process comprising a. 5. The method of claim 4,
The first lens is
Solar thermal chemical energy production device using a fluidized bed process, characterized in that it is a Fresnel lens. 6. The method of claim 5,
The second lens,
Solar thermal chemical energy production device using a fluidized bed process, characterized in that it is a convex lens. 7. The method of claim 6,
Solar thermal and chemical energy production apparatus using a fluidized bed process, characterized in that the path of sunlight passing through the first reflector and the second lens coincides with the optical axis of sunlight. 8. The method of claim 7,
The second reflector and the second lens,
Solar thermal chemical energy production apparatus using a fluidized bed process, characterized in that located on the same line as the solid material stored in the storage unit.

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