System and method for storing biomass fuel and recording medium

Abstract

To provide an art for storing biomass fuel with safety.SOLUTION: There is disclosed a system and method for storing biomass fuel and recording medium. A system for storing biomass fuel according to one embodiment can include an air injection device that supplies air to an internal of a storage storing biomass fuel and a control unit that controls the action of the air injection device.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a system for storing biomass fuel, a method for storing biomass fuel using the system, and a recording medium on which a program for executing the method is recorded. [Background technology]

[0002] Recently, the number of thermal power plants using biomass as fuel instead of coal has been increasing, and in line with this trend, the number of storage facilities for biomass fuel has also been increasing.

[0003] However, in the case of wood fuel, a typical biomass fuel, if humid air flows in or moisture is generated due to condensation after wood fuel is stored in a storage facility (for example, a warehouse), fermentation heat is generated by microorganisms, and various gases are generated in the process of fermentation heat generation, causing the temperature to rise continuously, which can lead to spontaneous combustion of the wood fuel. Research into the temperature conditions for spontaneous combustion of wood fuel has shown that it begins to generate heat at around 65°C.

[0004] Woody biomass has a burning rate of 0.2 to 0.7 mm / s, so it is not treated as a flammable hazardous material. However, the lower explosive limit of sawdust from woody biomass is 40 to 100 g / m3. 3 This range means that there is a risk of dust explosions when drying woody biomass.

[0005] Furthermore, biomass fuel can spoil when stored in a warehouse for a long period of time, which can lead to the generation of methane. Furthermore, due to the nature of warehouses, storing large amounts of biomass fuel can create pressure due to the weight of the biomass fuel, and there is a risk of fire if friction from mechanical parts, sparks from electrical leakage, or static electricity occurs. Therefore, there is a need for the development of new technology that can safely store biomass fuel. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Korean Patent Registration No. 10-2244045 Summary of the Invention [Problem to be solved by the invention]

[0007] The technical idea of ​​the present invention is to solve the above-mentioned problems, and has an object to provide a technology that enables safe storage of biomass fuel.

[0008] Another object of the technical idea of ​​the present invention is to provide a technique for managing biomass fuel so as to prevent fires from occurring during storage.

[0009] The problems that the present disclosure aims to solve are not limited to those described above, and other technical problems not mentioned will be clearly understood by those having ordinary skill in the art to which the present disclosure pertains from the content described below. [Means for solving the problem]

[0010] To achieve this objective, as one embodiment of the present invention, a biomass fuel storage system may include an air injection device that supplies air to the inside of a storage unit that stores biomass fuel, and a control unit that controls the operation of the air injection device.

[0011] In addition, the biomass fuel storage system further includes a temperature measuring unit installed inside the storage unit and measuring the internal temperature of the storage unit, and the control unit can control the internal temperature of the storage unit to be lowered when the internal temperature of the storage unit is equal to or higher than a first reference value.

[0012] In addition, the biomass fuel storage system further includes a ventilation device that discharges air inside the storage unit to the outside, and the control unit operates the ventilation device when the temperature value measured by the temperature measurement unit is equal to or higher than the first reference value, and can suspend operation of the ventilation device when the temperature value measured by the temperature measurement unit is equal to or lower than a second reference value after the ventilation device is operated.

[0013] In addition, the control unit can operate the air injection device when the temperature value measured by the temperature measurement unit is equal to or greater than the first reference value, and can suspend operation of the air injection device when the temperature value measured by the temperature measurement unit is equal to or less than a second reference value after the air injection device is operated.

[0014] Also, the second reference value may be lower than the first reference value.

[0015] The biomass fuel may include at least one of woody biomass and herbaceous biomass.

[0016] To achieve this object, as another embodiment of the present invention, a biomass fuel storage method may include a first temperature measurement step of measuring an internal temperature of a storage unit that stores biomass fuel, and a temperature control step of controlling the internal temperature of the storage unit to be lowered if the internal temperature of the storage unit is equal to or higher than a first reference value.

[0017] To achieve this object, in yet another embodiment of the present invention, a program for executing the above-described biomass fuel storage method may be recorded on a recording medium.

[0018] The above-described solutions to the problems are merely exemplary and should not be construed as limiting the present invention. In addition to the exemplary embodiments described above, there may be additional embodiments as described in the drawings and detailed description of the invention. [Effects of the Invention]

[0019] As described above, according to various embodiments of the present invention, the internal temperature of the storage unit is measured, and if the internal temperature is equal to or higher than a first reference value, the ventilation device and the air injection device are operated to lower the internal temperature of the storage unit, thereby preventing spontaneous combustion of biomass fuel and allowing the biomass fuel to be stored safely for a long period of time.

[0020] Furthermore, according to various embodiments of the present invention, air is sprayed upward from the bottom of the storage unit to exhaust the air inside the storage unit to the outside, thereby preventing explosions and fires caused by dust and gas inside the storage unit.

[0021] The effects of the various embodiments of the present invention are not limited to those mentioned above, and other effects not mentioned will be apparent to those skilled in the art from the claims. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a block diagram showing a main configuration of a biomass fuel storage system according to an embodiment of the present invention. [Figure 2] 1 is a conceptual diagram illustrating a biomass fuel storage system according to an embodiment of the present invention. [Figure 3] 1 is a conceptual diagram illustrating an injection member according to an embodiment of the present invention. [Figure 4] 1 is a flow chart illustrating a method for storing biomass fuel according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0023] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. However, for the sake of brevity, the description of already known technical aspects will be omitted or simplified.

[0024] It should be noted that references herein to "one" or "an" embodiment of the present invention do not necessarily refer to the same embodiment, but rather to at least one.

[0025] In the following examples, terms such as "first" and "second" are not used to limit the scope of the invention but are used to distinguish one component from another.

[0026] In the following examples, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0027] In the following examples, terms such as "comprise" or "have" mean that the features or components described in the specification are present, and do not preclude the possibility that one or more other features or components may be added.

[0028] If an embodiment is otherwise feasible, the order of certain steps may be performed differently from the order described. For example, two steps described in succession may be performed substantially simultaneously or in the reverse order from that described. That is, the steps of the methods described herein may be suitably performed in any order unless otherwise stated in the specification or clearly contradicted by context.

[0029] Fig. 1 is a block diagram showing the main configuration of a biomass fuel storage system according to an embodiment of the present invention, Fig. 2 is a conceptual diagram showing the biomass fuel storage system according to an embodiment of the present invention, and Fig. 3 is a conceptual diagram showing the injection member according to an embodiment of the present invention. Referring to Figs. 1 to 3, a biomass fuel storage system 10 according to an embodiment of the present invention includes a storage unit 100, a temperature measurement unit 110, a control unit 120, a ventilation device 130, and an air injection device 140.

[0030] In one embodiment, the storage unit 100 is a storage device having a space isolated from the outside. The biomass fuel 20 can be stored inside the storage unit 100. For example, the storage unit 100 can be realized as a warehouse consisting of multiple walls. As another example, the storage unit 100 can be realized as a cylindrical or conical silo.

[0031] In one embodiment, the temperature measuring unit 110 is installed inside the storage unit 100 and can measure the internal temperature of the storage unit 100. For example, the temperature measuring unit 110 can be installed on the inner bottom 150 of the storage unit 100 or on a wall that constitutes the storage unit 100.

[0032] According to one embodiment, at least one temperature measurement groove 153 may be formed in the bottom 150 of the storage unit 100, and the temperature measurement unit 110 may be disposed within the temperature measurement groove 153. In one embodiment, the temperature measurement unit 110 may be a contact-type temperature sensor or a non-contact-type temperature sensor. According to one embodiment, the temperature measurement unit 110 may be implemented as an infrared temperature sensor. The temperature measurement unit 110 disposed within the temperature measurement groove 153 may periodically measure the temperature around the bottom of the storage unit 100 and transmit the measured temperature value to the control unit 120.

[0033] According to one embodiment, a plurality of temperature measurement grooves 153 may be formed in the bottom 150 of the storage unit 100, and one temperature measurement unit 110 may be installed in each of the temperature measurement grooves 153. The height of the temperature measurement unit 110 may be smaller than the depth of the temperature measurement grooves 153 so that the temperature measurement unit 110 does not protrude outside the temperature measurement grooves 153. That is, because the temperature measurement unit 110 does not protrude outside the temperature measurement grooves 153, damage to the temperature measurement unit 110 due to a collision between the bucket 31 and the temperature measurement unit 110 when the bucket 31 of the loader 30 scoops up the biomass fuel 20 piled on the bottom 150 of the storage unit 100 can be prevented.

[0034] In one embodiment, the control unit 120 may maintain the internal temperature of the storage unit 100 at a constant level. For example, if the internal temperature of the storage unit 100 is equal to or higher than a first reference value, the control unit 120 may generally control each component of the biomass fuel storage system 10 so that the internal temperature of the storage unit 100 decreases.

[0035] In one embodiment, the ventilation device 130 can discharge air from inside the storage unit 100 to the outside. For example, the ventilation device 130 is installed above the storage unit 100 and can suck in air from inside the storage unit 100 and discharge it to the outside of the storage unit 100.

[0036] In one embodiment, the control unit 120 may operate the ventilation device 130 when the temperature value measured by the temperature measurement unit 110 is equal to or greater than a first reference value, and may stop the operation of the ventilation device 130 when the temperature value measured by the temperature measurement unit 110 is equal to or less than a second reference value after the ventilation device 130 has been operated.

[0037] According to one embodiment, the second reference value may be applied as a numerical value lower than the first reference value. For example, the first reference value may be 50°C, 51°C, 52°C, 53°C, 54°C, 55°C, 56°C, 57°C, 58°C, 59°C, 60°C, 61°C, 62°C, 63°C, 64°C, 65°C, 66°C, 67°C, 68°C, 69°C, or 70°C. For example, the second reference value may be 45°C, 44°C, 43°C, 42°C, 41°C, 40°C, 39°C, 38°C, 37°C, 36°C, 35°C, 34°C, 33°C, 32°C, 31°C, 30°C, 29°C, 28°C, 27°C, 26°C, or 25°C. Information about the first and second reference values ​​may be stored in advance in the control unit 120.

[0038] In one embodiment, the air injection device 140 can supply air into the storage unit 100. According to one embodiment, the air injection device 140 can include a piping member 141, an air injection member 142, and an injection member 143. In one embodiment, the piping member 141 is a pipe buried underground and forms a flow path through which air passes. In one embodiment, the air injection member 142 is connected to one end of the piping member 141 and is a device that injects air into the piping member 141. In one specific example, the air injection member 142 can be realized by a compressor.

[0039] According to one embodiment, at least one air injector groove 152 may be formed in the bottom 150 of the reservoir 100. In one embodiment, the air injector groove 152 may be formed in a cone shape with a diameter that decreases downward from the bottom surface 151 of the reservoir 100.

[0040] In one embodiment, the injection member 143 may be coupled to the other end of the piping member 141 and disposed within the air injection groove 152. For example, one injection member 143 may be disposed within one air injection groove 152.

[0041] In one embodiment, the injection member 143 may include an injection unit 1431, a board 1432, an inclined surface 1433, and a connecting unit 1434. In one embodiment, the injection unit 1431 may be formed in a cone shape whose diameter decreases downward from the bottom surface 151 of the storage unit 100. According to one embodiment, a plurality of air discharge holes 14311 may be formed on the surface of the injection unit 1431 and spaced apart from each other in the circumferential direction of the injection unit 1431. In one embodiment, the outer circumferential surface of the injection unit 1431 and the inner circumferential surface of the air injection groove 152 may be spaced apart from each other to form a flow path for the air discharged from the air discharge holes 14311.

[0042] In one embodiment, the board 1432 is a plate having a certain area. The board 1432 may be disposed below the bottom surface 151 of the storage unit 100. In other words, since the board 1432 does not protrude beyond the air injection device groove 152, when the bucket 31 of the loader 30 scoops up the biomass fuel 20 piled on the bottom 150 of the storage unit 100, a collision between the bucket 31 and the injection member 143 and damage to the injection member 143 can be prevented.

[0043] In one embodiment, the coupling unit 1434 may be formed at one end of the injection unit 1431 and may be inserted into and coupled to the piping member 141. In one embodiment, an inclined surface 1433 may be formed between the board 1432 and the injection unit 1431 to connect the board 1432 and the injection unit 1431.

[0044] According to one embodiment, the cross-sectional area of ​​the inclined surface 1433 may increase as it moves away from the bottom surface 151 of the storage unit 100, so that the air discharged from the air discharge hole 14311 diffuses while rising. Here, the cross-sectional area of ​​the inclined surface 1433 refers to the cross-sectional area in a direction parallel to the bottom surface 151 of the storage unit 100.

[0045] In one embodiment, the control unit 120 may operate the air injection device 140 when the temperature value measured by the temperature measurement unit 110 is equal to or greater than a first reference value, and may stop the operation of the air injection device 140 when the temperature value measured by the temperature measurement unit 110 is equal to or less than a second reference value after the air injection device 140 is operated.

[0046] For example, the control unit 120 can operate the air injection device 140 when the temperature value measured by the temperature measurement unit 110 is equal to or greater than 50. Specifically, when the air injection member 142 injects air into the piping member 141, the air moving along the piping member 141 is discharged to the outside of the injection unit 1431 through the air discharge hole 14311, and the air discharged from the air discharge hole 14311 rises along the space between the outer circumferential surface of the injection unit 1431 and the inner circumferential surface of the air injection device groove 152, and then can be quickly diffused around the inclined surface 1433.

[0047] After the air injection device 140 is operated, if the temperature value measured by the temperature measuring unit 110 is below 45°C, the control unit 120 can control the air injection device 140 to stop operating so that no more air is injected from the air exhaust hole 14311.

[0048] In one embodiment, the biomass fuel 20 may include at least one of woody biomass and herbaceous biomass. For example, the biomass fuel 20 may include at least one of wood pellets, palm kernel shells, and empty palm fruit bunches. Here, the empty palm fruit bunches are a by-product of palm fruit production and refer to the portion remaining after the fruit bunches are removed from the palm fruit.

[0049] Figure 4 is a flow chart showing a schematic diagram of a method for storing biomass fuel according to an embodiment of the present invention. A method for storing biomass fuel according to an embodiment of the present invention will be described with reference to Figures 1 to 4. For convenience, the description will be made in order.

[0050] 1. First temperature measurement stage <s401>< / s401> In this step, the temperature measuring unit 110 may measure the internal temperature of the storage unit 100 that stores the biomass fuel 20. The temperature measuring unit 110 may measure the internal temperature of the storage unit 100 at regular intervals and transmit the measured first temperature value to the control unit 120.

[0051] 2. First temperature value judgment step <s402>< / s402> In this step, the control unit 120 may determine whether the first temperature value measured by the temperature measurement unit 110 is equal to or greater than a first reference value.

[0052] 3. Temperature control stage <s403>< / s403> If the internal temperature of storage unit 100 measured in step S401 is equal to or higher than the first reference value, control unit 120 may control the internal temperature of storage unit 100 to be lowered in this step. For example, if the first reference value pre-stored in control unit 120 is 50°C and the first temperature value measured in step S401 is 50°C, control unit 120 may operate ventilation device 130 to exhaust air from inside storage unit 100 to the outside of storage unit 100 and operate air injection device 140 to supply air into storage unit 100. Depending on the implementation, control unit 120 may operate both ventilation device 130 and air injection device 140, or may selectively operate only ventilation device 130 or air injection device 140.

[0053] 4. Second temperature measurement stage <s404>< / s404> In this step, the temperature measuring unit 110 may measure the internal temperature of the storage unit 100 and transmit the measured second temperature value to the control unit 120 .

[0054] 5. Second temperature value judgment step <s405>< / s405> In this step, the control unit 120 may determine whether the second temperature value measured by the temperature measurement unit 110 is equal to or less than a second reference value.

[0055] 6. Operational interruption stage <s406>< / s406> If the internal temperature of the storage unit 100 measured in step S404 is equal to or lower than the second reference value, in this step, the control unit 120 may suspend the operation of at least one of the ventilation unit 130 and the air injection unit 140. For example, if the second reference value pre-stored in the control unit 120 is 45°C and the second temperature value measured in step S404 is 40°C, the control unit 120 may suspend the operation of the ventilation unit 130 and the air injection unit 140 that are currently operating.

[0056] The biomass fuel storage method according to various embodiments of the present invention can be realized by a computer-readable recording medium and computer-readable code. The computer-readable recording medium can include any type of recording device that stores data readable by a computer system. Examples of the computer-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, and optical data storage device. The computer-readable recording medium can also be distributed among computer systems connected via a network, and the computer-readable code can be stored in an executable manner in a distributed manner.

[0057] As described above, according to various embodiments of the present invention, the internal temperature of the storage unit 100 is measured, and if the temperature is equal to or higher than the first reference value, the ventilation device 130 and the air injection device 140 are operated to lower the internal temperature of the storage unit 100, thereby preventing spontaneous combustion of the biomass fuel 20 and allowing the biomass fuel 20 to be stored safely for a long period of time.

[0058] In addition, in various embodiments of the present invention, the air injection device 140 injects air upward from the bottom of the storage unit 100, pushing gas and heat at the bottom 150 of the storage unit 100 upward, and the ventilation device 130 exhausts the gas and heat to the outside of the storage unit 100, thereby quickly circulating the air inside the storage unit 100 and preventing explosions and fires caused by dust and gas inside the storage unit 100.

[0059] As described above, the specific description of the present invention has been disclosed based on the embodiments, but the above-mentioned embodiments merely describe preferred examples of the present invention, and therefore the present invention should not be understood as being limited to the above-mentioned embodiments, and the scope of the present invention should be understood as the scope of the claims described below and their equivalent concepts. [Explanation of symbols]

[0060] 10. Biomass fuel storage system 100 Storage Unit 110 Temperature measurement section 120 control section 130 Ventilation Equipment 140 Air Injector 141 Piping components 142 Air injection member 143 Injection member 1431 Injection Unit 14311 Air exhaust hole 1432 Board 1433 Slope 1434 Combined Unit 150 bottom 151 bottom 152 Air injection groove 153 Temperature measurement groove 20 Biomass fuel 30 Loader 31 Bucket

Claims

1. an air injection device that supplies air to the inside of the storage unit that stores the biomass fuel; and a control unit that controls the operation of the air injection device.

2. The biomass fuel storage system further includes a temperature measuring unit installed inside the storage unit and measuring an internal temperature of the storage unit; The biomass fuel storage system according to claim 1, wherein the control unit controls the internal temperature of the storage unit to be lowered when the internal temperature of the storage unit is equal to or higher than a first reference value.

3. The biomass fuel storage system further includes a ventilation device that exhausts air inside the storage unit to the outside, 3. The biomass fuel storage system of claim 2, wherein the control unit operates the ventilation device when the temperature value measured by the temperature measurement unit is equal to or greater than the first reference value, and stops operation of the ventilation device when the temperature value measured by the temperature measurement unit is equal to or less than a second reference value after the ventilation device is operated.

4. 3. The biomass fuel storage system of claim 2, wherein the control unit operates the air injection device when the temperature value measured by the temperature measurement unit is equal to or greater than the first reference value, and stops operation of the air injection device when the temperature value measured by the temperature measurement unit is equal to or less than a second reference value after the air injection device is operated.

5. The biomass fuel storage system according to claim 3 or 4, wherein the second reference value is a numerical value lower than the first reference value.

6. The biomass fuel storage system according to claim 1, wherein the biomass fuel includes at least one of woody biomass and herbaceous biomass.

7. a first temperature measurement step of measuring an internal temperature of a storage section that stores biomass fuel; and controlling the internal temperature of the storage unit to be lowered when the internal temperature of the storage unit is equal to or higher than a first reference value.

8. A computer-readable recording medium having a program recorded thereon for executing the method of claim 7.

Images