KR20220057679A - Torrefaction device for biomass - Google Patents

Abstract

The present invention relates to a biomass torrefaction device including: a condenser for condensing sunlight; a heat storage device installed to irradiate the sunlight collected by the condenser and having a heat collecting member that collects solar heat of the sunlight to heat a working fluid; and a torrefaction machine having a torrefaction chamber for torrefying biomass using solar heat stored in the working fluid.

Description

Biomass torrefaction device {Torrefaction device for biomass}

The present invention relates to a biomass torrefaction apparatus.

Recently, economic and environmental problems due to policies such as nuclear phase-out and coal phase-out, environmental problems such as global warming, and the limit of the potential amount of fossil fuels are constantly being discussed. In order to solve these economic and environmental problems, research on new and renewable energy is being actively conducted.

In particular, among new and renewable energy, wood pellets that can be used as fuel without major structural changes in current coal power plants are in the spotlight. However, the production of wood pellets is not keeping up with the demand. In order to solve this, research is being conducted to use agricultural by-products and forestry by-products as fuels to replace wood.

However, agricultural by-products have a high water content but low calorific value, require a large storage space due to a large volume, and require a lot of transportation costs, so it is difficult to pelletize and use as fuel. In addition, forestry by-products, like agricultural by-products, require a large storage space due to their large volume and require a lot of transportation costs, so it is difficult to pelletize them and use them as fuel.

The present invention, in order to solve the problems of the prior art described above, an object of the present invention is to provide a biomass torrefaction apparatus for torrefaction so that the biomass can be used as a fuel.

Biomass torrefaction apparatus according to a preferred embodiment of the present invention for solving the above-described problems, a condenser for condensing sunlight; a heat storage device installed to irradiate the sunlight collected by the light collector and having a heat collecting member configured to collect solar heat of the sunlight to heat a working fluid; and a torrefaction chamber having a torrefaction chamber for torrefoiling biomass using solar heat stored in the working fluid.

Preferably, the working fluid is a molten salt in which sodium nitrate and potassium nitrate are mixed.

Preferably, the condenser includes at least one condensing lens for condensing the sunlight.

Preferably, the condenser further includes a conical reflector installed to reflect the sunlight toward the condenser lens.

Preferably, the conical reflector has a first opening through which the sunlight enters, and has a conical shape and reflects the sunlight entering through the first opening toward the center of the conical reflector. On the inner circumferential surface of the conical reflector It has a reflective surface provided, and the condensing lens is disposed in the center so that the sunlight reflected by the reflective surface is incident.

Preferably, the conical reflector further has a second opening through which the sunlight collected by the condensing lens is emitted.

Preferably, at least one of the condensing lenses is a Fresnel lens having a predetermined focus.

Preferably, the heat collecting member is disposed at the focal point such that the sunlight collected by the Fresnel lens is irradiated.

Preferably, the regenerator further includes a heat storage tank in which the working fluid is stored, and a first circulation passage for circulating the working fluid between the heat collecting member and the heat storage tank.

Preferably, the regenerator further includes a first circulation pump installed in the first circulation passage to pump the working fluid discharged from the heat storage tank toward the heat collecting member.

Preferably, the torrefaction machine includes a torrefaction chamber in which the biomass is accommodated, a heat exchanger heating air by heat exchange with a working fluid, and the shaft so that the biomass accommodated in the torrefaction chamber is torrefied by hot air. and a second circulation passage for circulating the air between the hot air and the torrefaction chamber.

Preferably, the torrefaction machine further includes a second circulation pump installed in the second circulation passage to pump the air discharged from the torrefaction chamber toward the heat exchanger.

Preferably, it further comprises an auxiliary heat source for selectively supplying auxiliary heat for supporting the solar heat to the torrefaction machine.

Preferably, the auxiliary heat source is connected to the circulation passage to heat the air flowing along the circulation passage.

Preferably, the biomass comprises at least one of agricultural by-products and forestry by-products.

Preferably, the biomass torrefaction apparatus according to the preferred embodiment of the present invention described above; and a transport device for transporting the biomass torrefaction device.

The present invention relates to a biomass torrefaction apparatus, and has the following effects.

First, in the present invention, biomass that is thrown away in an unused state can be torrefied by agricultural and marine products and forestry by-products. According to the present invention, torrefied biomass can be used as a fuel to replace wood pellets, and the apparent density of the biomass can be lowered, thereby reducing the space and cost required for storage or transportation.

Second, the present invention can prevent environmental pollution from occurring due to torrefaction of biomass using fossil fuels by torrefoiling biomass using solar heat, which is an eco-friendly energy, as a main heat source.

Third, in the present invention, by applying solar heat to the biomass through a working fluid composed of molten salt having a large heat capacity, the biomass can be stably torrefied under a constant torrefaction temperature.

1 is a conceptual diagram showing a schematic configuration of a biomass torrefaction apparatus according to a preferred embodiment of the present invention.
Fig. 2 is a plan view of the Fresnel lens shown in Fig. 1;
FIG. 3 is a view illustrating an aspect in which sunlight is condensed by the Fresnel lens shown in FIG. 2 .

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the component from other components, and the essence, order, or order of the component is not limited by the term. In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

1 is a conceptual diagram showing a schematic configuration of a biomass torrefaction apparatus according to a preferred embodiment of the present invention, FIG. 2 is a plan view of the Fresnel lens shown in FIG. 1, and FIG. 3 is the Fresnel shown in FIG. It is a diagram showing an aspect in which sunlight is condensed by a lens.

Referring to FIG. 1 , the biomass torrefaction apparatus 1 according to a preferred embodiment of the present invention includes a concentrator 10 for condensing sunlight S, and sunlight S condensed by the condenser 10 . ) a thermal accumulator 20 for storing solar heat in the working fluid O, and a torrefoiler 30 for torrefoiling the biomass B using the solar heat stored in the working fluid O as a heat source, and solar heat It may include an auxiliary heat source 40 for selectively supplying auxiliary heat to the torrefaction unit 30 to assist.

The biomass torrefaction apparatus 1 is a truck, other transportation device, so as to construct a mobile torrefaction plant for producing torrefied pellets by processing agricultural by-products and forestry by-products collected at the production site in real time at the production site. It is preferable to install

agricultural by-products Theoretical Potential (TOE year-1) ratio (%) rice straw 2,244,395 55.8 chaff 405,235 10.1 pedestal 303,029 7.5 apple pruning eggplant 276,189 6.9 grape pruning branches 174,337 4.3 Sweet Potato Stem 113,145 2.8 field?? stem 111,426 2.8 pear prune eggplant 85,573 2.1 bean stalk 56,835 1.4 persimmon pruning eggplant 48,692 1.2 potato stem 43,656 1.1 corn stalk 40,046 One Peach Prunes 32,776 0.8 sesame seeds 28,750 0.7 bean pods 23,061 0.6 barley straw 19,622 0.5 rice barley straw 12,004 0.3 Sum 4,018,771 100

Table 1 is a table showing the ratio of major agricultural by-products in the theoretical potential of agricultural biomass per year. Rice husks and rice husks, which account for 65% of the theoretical potential of annual agricultural biomass, are mainly used as livestock feed and compost. Except for rice husks and rice husks, agricultural by-products of other types are thrown away without being used, as there is no specific use for them.

On the other hand, in the case of forestry by-products, the amount left unused due to difficulty in collection and low value of use accounts for 54% of the total forest timber volume.

division Calorific value per step weight [kcal/kg] rice straw 3,755-4199 chaff 4,057-4,066 cornstalk 3,784-4,208 rice barley straw 3,780-3,810 straw 3,823-4,275 Potato Stems 4,107 Sweet Potato Stem 4,109-4,161 corn stalk 3,950-4,234 Joe Stem 4,076 buckwheat stalks 4,566-4,586 soybean stalk 4,171-4,291 soybean husk 3,961-3,982 red bean stem 4,183-4,363 red bean skin 4,239-4,355 mung bean stems 4,219 mung bean shell 4,179 chilli stem 4,111-4,278 sesame stalks 3,848-4,268 perilla stalk 3,969-4,315 peanut stalk 3,972-4,168 rapeseed stem 4,209 forestry waste wood 4,120 Forestry by-products 4,120 sub-bituminous coal 4,600-6,400 wood pellets 4,500

Table 2 is a table showing the calorific value of agricultural by-products, forestry by-products, coal, wood pellets, and the like. Agricultural by-products and forestry by-products have relatively low calorific value (kcal/kg) per unit weight to be directly used as fuel to replace wood pellets.

According to these Tables 1 and 2, the biomass torrefaction apparatus 1 is to torrefied biomass (B) including at least one of unused agricultural by-products and unused forestry by-products other than rice husks and rice husks. It is preferably used for, but is not limited thereto.

Hereinafter, with reference to drawings, the structure of the biomass torrefaction apparatus 1 is demonstrated.

First, the light collector 10 is a device for condensing sunlight S so that the solar heat can be used as a heat source for torrefoiling the biomass B.

The structure of the light collector 10 is not particularly limited. For example, as shown in FIGS. 1 and 2 , the light collector 10 includes a conical reflector 12 and a conical reflector 12 that are provided to reflect the sunlight S incident therein toward the center. At least one condensing lens 14 for condensing the reflected sunlight S may be provided.

The condensing area of the condenser 10 for condensing the sunlight S is not particularly limited. For example, the conical reflector 12 and the condensing lenses 14 are, respectively, the shape and weight of the biomass B so that the biomass B can be torporized under a torrefaction temperature of 200° C. to 300° C. , may have a light collection area corresponding to the water content and composition, and other environmental conditions.

The conical reflector 12 has a certain thickness and is formed in a conical shape. 1, on the inner peripheral surface of the conical reflector 12, a reflective surface 12a that reflects sunlight S toward the center of the conical reflector 12 is formed, and the conical bottom surface of the conical reflector 12 is formed. A first opening 12b is formed in a portion corresponding to , and a second opening 12c is formed in a portion corresponding to the cone vertex of the conical reflector 12 .

As shown in FIG. 1 , the conical reflector 12 is installed so that sunlight S enters the inside through the first opening 12b having a larger cross-sectional area than the second opening 12c. Then, the sunlight S enters the inside of the conical reflector 12 through the first opening 12b and then is incident on the reflective surface 12a, and the sunlight S incident on the reflective surface 12a is It is reflected toward the center of the conical reflector 12 by the reflective surface 12a. Through this, the conical reflector 12 primarily condenses the sunlight (S).

The condensing lens 14 is provided to secondarily condense the sunlight S firstly condensed by the conical reflector 12 .

The kind of lens usable as the condensing lens 14 is not particularly limited. For example, as shown in FIG. 2 , at least one of the condensing lenses 14 may be a Fresnel lens 16 having a predetermined focus F.

The Fresnel lens 16 is a type of condensing lens, and is provided to collect light like a convex lens and to reduce the thickness of the lens. Here, the reason why the Fresnel lens 16 can serve as a convex lens even when the thickness of the Fresnel lens 16 is thinly reduced is that the incident surface 16a of the Fresnel lens 16 is divided into several bands, and each band has a prism. This is because the aberration of the lens is made small by giving the effect. On the other hand, in order to focus light on one focal point of the lens, it is necessary to reduce the difference in refractive index for each area of the lens. To this end, in the Fresnel lens 16, numerous concentric ring-shaped grooves are provided on the incident surface 16a, and the refractive index for each region is uniformly adjusted by these grooves.

In the Fresnel lens 16, sunlight S primarily focused by the conical reflector 12 is incident on the incident surface 16a of the Fresnel lens 16, and is It is disposed at the central portion of the conical reflector 12 so that the differentially concentrated sunlight S is emitted to the outside of the conical reflector 12 through the second opening 12c of the conical reflector 12 .

On the other hand, the condenser 10, the conical reflector 12 and the Fresnel lens 16 so as to adjust the incident angle of the sunlight (S) incident on the conical reflector 12 and the Fresnel lens 16. A lens feeder (not shown) may be further provided. Such a lens transporter is, so that the angle of incidence of the sunlight S incident on the incident surface 16a of the Fresnel lens 16 is vertical, the conical reflector 12 and the Fresnel lens ( 16) can be transferred gradually.

Referring to FIG. 3 , as the light collector 10 is provided as above, the light collector 10 uses the conical reflector 12 and the Fresnel lens 16 to convert sunlight (S) into the focus (F) of the Fresnel lens. It can concentrate the light in one place. Through this, the biomass torrefaction apparatus 1 can smoothly secure solar heat having a sufficient level of heat to torrefaction of the biomass.

Next, the heat storage unit 20 is a device for storing the solar heat of the sunlight (S) condensed by the light collector (10) in the working fluid (O).

The configuration of the regenerator 20 is not particularly limited. For example, as shown in FIG. 1 , the heat accumulator 20 is installed to irradiate the sunlight S concentrated on the condenser 10, and collects the solar heat of the sunlight S to collect the working fluid ( Between the heat collecting member 22 which heats O), the heat storage tank 24 in which the working fluid O heated by solar heat in the heat collecting member 22 is stored, and the heat collecting member 22 and the heat storage tank 24 Installed in the first circulation passage 26 to circulate the working fluid O in the first circulation passage 26 and to pump the working fluid O discharged from the thermal storage tank 24 toward the heat collecting member 22 It may be provided with a first circulation pump 28 and the like.

The material constituting the working fluid (O) is not particularly limited, and a material having a large heat capacity is preferably used as the working fluid (O), which exists in a liquid phase in a temperature range corresponding to the torrefaction temperature of the biomass (B). . For example, the working fluid O may be composed of a mixed salt in which sodium nitrate having a melting point of about 308° C. and potassium nitrate having a melting point of about 334° C. are mixed.

The mixing ratio of sodium nitrate and potassium nitrate is not specifically limited. For example, sodium nitrate and potassium nitrate may be mixed in a predetermined ratio so that the working fluid O exists as a liquid molten salt within a temperature range of about 260°C to 550°C.

Hereinafter, the present invention will be described based on the case in which the working fluid O is composed of the mixed salt.

The structure of the heat collecting member 22 is not particularly limited. For example, as shown in FIG. 1 , the heat collecting member 22 includes a heating space 22a in which the working fluid O is accommodated, and sunlight S focused by the light collector 10 is irradiated. The heat collecting surface 22b, the inlet 22c through which the working fluid O passing through the first supply passage 26a of the first circulation passage 26 to be described later flows into the heating space 22a, and the heating space ( It may have an outlet 22d for transferring the working fluid O heated in 22a) to a first recovery passage 26b of a first circulation passage 26 to be described later.

The heating space 22a is a closed space provided inside the heat collecting member 22 and is partitioned by a plurality of walls to be isolated from the outside.

The heat collecting surface 22b is formed on the outer surface of any one of the walls. The material of the walls is not particularly limited. For example, any one of the walls may be made of a material having a low reflectance and high thermal conductivity so that the solar heat of the sunlight S can be smoothly collected, and the other walls except for the one wall are the working fluid (O) may be composed of a low thermal conductivity insulating material so that the solar heat stored in the wall does not leak to the outside through the wall.

The heat collecting member 22 is installed so that the sunlight S condensed by the light collector 10 is irradiated to the heat collecting surface 22b. For example, as shown in FIG. 1 , the heat collecting member 22 may be installed such that the heat collecting surface 22b is positioned at the focal point F of the Fresnel lens 16 . Then, the sunlight S concentrated by the Fresnel lens 16 is irradiated to the heat collecting surface 22b, so that the solar heat of the sunlight S may be collected on the heat collecting surface 22b.

The inlet 22c is formed on one side of the heat collecting member 22 to communicate the first supply passage 26a and the heating space 22a, and the outlet 22d is the heating space 22a and the first recovery passage 26b. ) is formed on the other side of the heat collecting member 22 to communicate. Then, the working fluid O that has passed through the first supply flow path 26a flows into the heating space 22a through the inlet 22c, and the working fluid O that flows into the heating space 22a flows into the heat collecting surface ( It is heated by the solar heat transmitted from 22b), and the working fluid O heated by the solar heat is delivered to the first recovery passage 26b through the outlet 22d.

On the other hand, when the working fluid (O) is cooled to below the melting point, it undergoes a phase transition to a solid phase. 22a) is difficult to supply. To solve this, the heat collecting member 22 may further have an injection port (not shown) for injecting the working fluid O, which has been phase-transformed to the solid phase, into the heating space 22a. Then, the solid working fluid O injected into the heating space 22a through the inlet is melted by the solar heat transmitted from the heat collecting surface 22b and changed to a liquid phase, and then the first recovery through the outlet 22d It may be transferred to the flow path 26b.

The heat storage tank 24 is provided to store the working fluid O heated by the solar heat in the heat collecting member 22 therein. The thermal storage tank 24 includes an inlet 24a for supplying the working fluid O to the inside of the thermal storage tank 24 and the working fluid O stored in the thermal storage tank 24 to the thermal storage tank 24 ) may have an outlet (24b) for discharging to the outside, and the like.

The structure of the first circulation passage 26 is not particularly limited. For example, the first circulation passage 26 is formed from the first supply passage 26a for supplying the working fluid O discharged from the thermal storage tank 24 to the heat collecting member 22 , and the heat collecting member 22 . A first recovery passage 26b for recovering the discharged working fluid O to the thermal storage tank 24 may be provided.

The first supply passage 26a connects the outlet 24b of the thermal storage tank 24 and the inlet 22c of the heat collecting member 22 , and the first recovery passage 26b is the outlet 24d of the heat collecting member 22 . ) and the inlet 24a of the thermal storage tank 24 are connected. Then, the working fluid O cooled by heat exchange with the air (A) by the heat exchanger 34 of the torrefaction unit 30 to be described later in the heat storage tank 24 passes through the first supply passage 26a. The heat collecting member 22 may be supplied to the heat collecting member 22 , and the heat collecting member 22 heated by the heat collecting member 22 may be recovered to the heat storage tank 24 through the first recovery passage 26b.

The first circulation pump 28 is installed on the first circulation passage 26 so that the working fluid O has a flow force for circulating the first circulation passage 26 . For example, as shown in FIG. 1 , the first circulation pump 28 may be installed on the first supply passage 26a. The first circulation pump 28 may pump the working fluid O flowing through the first supply flow path 26a toward the heat collecting member 22 to impart a flow force to the working fluid O.

Next, the torrefaction machine 30 is a device for torrefoiling the biomass (B) using the solar heat stored in the working fluid (O) as a heat source.

The structure of the torrefaction machine 30 is not particularly limited. For example, the torrefaction machine 30 includes a torrefaction chamber 32 in which the biomass (B) is accommodated, and a heat exchanger 34 that heats the air (A) by heat exchange with the working fluid (O); A second circulation passage 36 for circulating air A between the regenerator 20 and the torrefaction chamber 32 so that the biomass B accommodated in the torrefaction chamber 32 is torrefied by hot air, etc. can be provided.

As shown in FIG. 1 , the biomass B to be torrefied may be accommodated in the torrefaction chamber 32 . In this case, the biomass B is preferably accommodated in the torrefaction chamber 32 in a pre-pelletized state by a pellet molding machine (not shown), but is not limited thereto.

The torrefaction chamber 32 includes an inlet 32a for introducing the working fluid O that has passed through the second recovery passage 36b of the second circulation passage 36 to be described later into the interior of the torrefaction chamber 32 and , and may have an outlet 32b for transferring the working fluid O cooled in the torrefaction chamber 32 to the second supply passage 36a of the second circulation passage 36 to be described later.

As shown in FIG. 1 , the heat exchanger 34 has a pipe shape through which air A can pass through the inside of the heat exchanger 34 , and is applied to the working fluid O accommodated in the heat storage tank 24 . It is installed inside the thermal storage tank 24 so as to be charged. According to this heat exchanger 34, heat exchange occurs between the air (A) accommodated in the heat exchanger (34) and the working fluid (O) accommodated in the heat storage tank (24), so that the air (A) is converted into a working fluid ( O), and the working fluid (O) is cooled by air (A).

The heat exchanger 34 includes an inlet 34a for introducing the air A that has passed through the second supply passage 36a into the heat exchanger 34, and the air heated inside the heat exchanger 34 ( It may have an outlet 34b, etc. for transferring A) to the second recovery passage 36b.

The structure of the second circulation passage 36 is not particularly limited. For example, the second circulation passage 36 is formed from the second supply passage 36a for supplying the air A discharged from the torrefaction chamber 32 to the heat exchanger 34 , and the heat exchanger 34 . A second recovery passage 36b for recovering the discharged air A to the torrefaction chamber 32 may be provided. As shown in FIG. 1 , the second supply passage 36a connects the outlet 32b of the torrefaction chamber 32 and the inlet 34a of the heat exchanger 34 , and the second recovery passage 36b is The outlet 34b of the heat exchanger 34 and the inlet 32a of the torrefaction chamber 32 are connected.

According to this second circulation passage 36, the air (A) heated in the heat exchanger 34 is introduced into the torrefaction chamber 32 through the second recovery passage 36b, and the torrefaction chamber 32 ) received in the biomass (B) is heat-treated by the high-temperature hot air formed by the air (A) introduced through the second recovery passage (36b) is semi-carbonized (semi-carbonization, tyorrefaction).

The torrefaction time of biomass (B) is not specifically limited. For example, when the torrefaction temperature of the biomass (B) is 200° C. to 300° C., the torrefaction time may be about 1 hour.

On the other hand, the air (A) cooled while torrefoiling the biomass (B) inside the torrefaction chamber 32 is re-delivered to the heat exchanger 34 through the outlet 34b and the second supply passage 36a. Then, it may be reheated by solar heat stored in the working fluid O.

The second circulation pump 38 is installed on the second circulation passage 36 so that the air A has a flow force for circulating the second circulation passage 36 . For example, as shown in FIG. 1 , the second circulation pump 38 may be installed on the second supply passage 36a. The second circulation pump 38 pumps the air (A) flowing through the second supply flow path (36a) toward the heat exchanger (34) to impart a flow force to the air (A).

Next, the auxiliary heat source 40 is a device for selectively supplying auxiliary heat capable of additionally heating the air (A) heated by the working fluid (O).

The auxiliary heat source 40 is provided to apply auxiliary heat generated by the auxiliary heat source 40 to the air (A). For example, as shown in FIG. 1 , the auxiliary heat source 40 is on the second supply passage 36a so as to apply auxiliary heat to the air A passing through the second supply passage 36a. can be installed on

The kind of auxiliary heat is not particularly limited. For example, the auxiliary heat source 40 may supply heat generated by the electric heater, waste heat recovered from an external device, or the like as auxiliary heat.

This auxiliary heat source 40 passes the auxiliary heat through the second recovery passage 36b when the solar heat of the sunlight S collected by the condenser 10 is insufficient to torrefy the biomass B. It can be selectively applied to the air (A). Then, the biomass (B) can be torporized smoothly by the hot air formed by secondary heating of the air (A) by solar heat and auxiliary heat.

As described above, the biomass torrefaction apparatus 1 can torrefoil agricultural and marine products and forestry by-products that are biomass (B) that are thrown away in an unused state. This torrefied biomass (B) may have a calorific value (kcal/kg) per unit weight similar to that of wood pellets, and may be used as a new renewable energy to replace wood pellets, that is, as fuel. In addition, the torrefied biomass (B) has a relatively lower apparent density than before torrefaction by reducing the moisture content and volume, thereby reducing the space and cost required for storage or transportation.

In addition, the biomass torrefaction apparatus 1 uses solar heat, which is an eco-friendly energy, as a main heat source to torporize the biomass (B), thereby torrefying the biomass (B) using a fossil fuel, thereby causing environmental pollution. can be prevented from doing

In addition, the biomass torrefaction apparatus 1 applies solar heat to the biomass (B) through a working fluid (O) composed of molten salt having a large heat capacity, thereby converting the biomass (B) under a constant torrefaction temperature. It can be stably torrefied.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains.

Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

1: biomass torrefaction device
10 : light collector
12: conical reflector
12a: reflective surface
12b: first opening
12c: second opening
14: condensing lens
16: Fresnel Lens
16a: entrance face
20: regenerator
22: heat collecting member
22a: heating space
22b: heat collecting surface
22c: inlet
22d: outlet
24: heat storage tank
24a: inlet
24b: outlet
26: first circulation flow path
26a: first supply flow path
26b: first recovery flow path
28: first circulation pump
30: torrefaction machine
32: torrefaction chamber
32a: inlet
32b: outlet
34: heat exchanger
34a: inlet
34b: outlet
36: second circulation flow path
36a: second supply flow path
36b: second recovery passage
38: second circulation pump
40: auxiliary heat source
F: focus
S: sunlight
O: working fluid
A: Air
B: biomass

Claims (16)

a condenser for condensing sunlight;
a heat storage device installed to irradiate the sunlight collected by the light collector and having a heat collecting member configured to collect solar heat of the sunlight to heat a working fluid; and
A biomass torrefaction apparatus comprising a torrefaction chamber having a torrefaction chamber for torrefoiling biomass using solar heat stored in the working fluid. According to claim 1,
The said working fluid is a molten salt in which sodium nitrate and potassium nitrate were mixed, biomass torrefaction apparatus. According to claim 1,
The light concentrator, biomass torrefaction apparatus comprising at least one condensing lens for condensing the sunlight. 4. The method of claim 3,
The condenser, biomass torrefaction apparatus further comprising a conical reflector installed to reflect the sunlight toward the condensing lens. 5. The method of claim 4,
The conical reflector has a first opening through which the sunlight enters, and has a cone shape and is provided on the inner circumferential surface of the conical reflector to reflect the sunlight entering through the first opening toward the center of the conical reflector. have a pardon,
The condensing lens is disposed in the center so that the sunlight reflected by the reflective surface is incident, the biomass torrefaction device. 6. The method of claim 5,
The conical reflector further has a second opening through which the sunlight collected by the condensing lens is emitted. 7. The method of claim 6,
At least one of the condensing lenses is a Fresnel lens having a predetermined focus, a biomass torrefaction apparatus. 8. The method of claim 7,
The heat collecting member is disposed at the focal point to irradiate the sunlight collected by the Fresnel lens, the biomass torrefaction apparatus. According to claim 1,
The regenerator may further include a heat storage tank in which the working fluid is stored, and a first circulation passage for circulating the working fluid between the heat collecting member and the heat storage tank. 10. The method of claim 9,
The regenerator may further include a first circulation pump installed in the first circulation passage to pump the working fluid discharged from the thermal storage tank toward the heat collecting member. 10. The method of claim 9,
The torrefaction chamber includes a torrefaction chamber in which the biomass is accommodated, a heat exchanger heating air by heat exchange with a working fluid, and the regenerator and the torrefaction chamber so that the biomass accommodated in the torrefaction chamber is torrefied by hot air. A biomass torrefaction apparatus comprising a second circulation passage for circulating the air between torrefaction chambers. 12. The method of claim 11,
The torrefaction apparatus further comprising a second circulation pump installed in the second circulation passage to pump the air discharged from the torrefaction chamber toward the heat exchanger. 12. The method of claim 11,
Further comprising an auxiliary heat source for selectively supplying auxiliary heat for supporting the solar heat to the torrefaction apparatus, biomass torrefaction apparatus. 14. The method of claim 13,
The auxiliary heat source is connected to the circulation passage to heat the air flowing along the circulation passage, biomass torrefaction apparatus. According to claim 1,
The biomass, including at least one of agricultural by-products and forestry by-products, biomass torrefaction apparatus. The biomass torrefaction apparatus according to any one of claims 1 to 15; and
A mobile torrefaction plant comprising a transport device for transporting the biomass torrefaction device.

Images