# US 2018/0021610 A1 · Cooling device for spontaneous combustion prevention > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0021610 A1 - Document ID: US20180021610A1 - Status: Published application - Kind: A1 - Application number: 15/366,262 - Filed: 2016-12-01 - Published: 2018-01-25 - Earliest claimed: 2016-07-22 - Assignees: People I Co., Ltd. - Applicants: People I Co., Ltd. - Inventors: Chan Sub YEUM; Ju Young LIM; Hyun Wook MOON - Web page: https://patentgrep.com/patent/US20180021610A1 ## CPC - A62C 3/04: for dust or loosely-baled or loosely-piled materials, e.g. in silos, in chimneys (flame traps A62C4/00) - A62C 3/06: of highly inflammable material, e.g. light metals, petroleum products - A62C 99/0018: {using gases or vapours that do not support combustion, e.g. steam, carbon dioxide} - C10L 5/04: Raw material {of mineral origin} to be used; Pretreatment thereof {(pretreatment of fuels of non-mineral origin C10L5/40)} - F23K 3/00: Feeding or distributing of lump or pulverulent fuel to combustion apparatus - C10L 2290/06: Heat exchange, direct or indirect - F17C 2221/014: Nitrogen - F17C 2260/042: Reducing risk of explosion - A62C: FIRE-FIGHTING (fire-extinguishing compositions, use of chemical substances in extinguishing fires A62D1/00; spraying, applying liquids or other fluent materials to surfaces in general B05; alarm arrangements G08B, e.g. fire alarms actuated by smoke or gases G08B17/10) - C10L: FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS - F23K: FEEDING FUEL TO COMBUSTION APPARATUS (fuel feeders specially adapted for fluidised bed combustion apparatus F23C10/22) - F17C: VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES (storing fluids in natural or artificial cavities or chambers in the earth B65G5/00; construction or assembling of bulk storage containers employing civil-engineering techniques E04H7/00; variable-capacity gas-holders F17B; liquefaction or refrigeration machines, plants, or systems F25) ## Abstract The present invention relates to a cooling device for preventing fire due to spontaneous combustion of coal stockpiles in a coal-fired power plant, and more specifically, to a cooling device for preventing spontaneous combustion of coal stockpiles, for which a plurality of cooling devices are provided at a predetermined interval in coal stockpiles and, when a temperature (ignition temperature) specified by a user is detected from the outer surface, compressed liquefied nitrogen stored in the cooling device is ejected to lower a temperature around the loaded coal, thereby preventing spontaneous combustion by the oxidation of coal. ## Claims ### Claim 1 A cooling device for preventing spontaneous combustion of coal stockpiles, the cooling device comprising: an outer case having an accommodation space (S) formed therein and having discharge holes through which a coolant disposed in the storage space (S) is disposed to an outside; injection valves which opens and closes the discharge holes; and a control module configured to measure an external temperature and control opening and closing of the injection valves based on at least the external temperature. ### Claim 2 (depends on 1) The cooling device of claim 1, further comprising: an inner case disposed in the accommodation space (S) and having a storage space (S1) in which the coolant is stored; and supply valves configured to selectively supply the coolant stored in the storage space (S1) to the accommodation space (S), wherein the control module controls opening and closing of the supply valves based on at least the external temperature. ### Claim 3 (depends on 2) The cooling device of claim 2, wherein a pressure in the storage space (S1) in which the coolant is stored is higher than a pressure in the accommodation space (S). ### Claim 4 (depends on 2) The cooling device of claim 2, wherein the inner case further includes a bottom plate which is slid in a moving direction of the coolant along an inner surface of the storage space (S1) when the coolant in the storage space (S1) is moved to the accommodation space (S). ### Claim 5 (depends on 2) The cooling device of claim 2, wherein the outer case includes an upper case having a lower side opened and a lower case coupled to the upper case to form the accommodation space (S), and a fixing arm protrudes from an inner surface of the upper case or the lower case and has one end coupled to an outer surface of the inner case to attach and detach the inner case. ### Claim 6 (depends on 1) The cooling device of claim 1, wherein: the discharge hole includes a first hole adjacent to an outer surface of the outer case and a second hole extending from the first hole and adjacent to an inner surface of the outer case, and a diameter of the second hole is greater than a diameter of the first hole. ### Claim 7 (depends on 2) The cooling device of claim 2, wherein the outer case includes an upper case in a hollow hemispherical shape which has an opening formed in a circular shape on an upper side and is opened downward, a lower case in a hollow hemispherical shape which is opened upward to form the accommodation space (S) and is coupled to the upper case, and an electrical unit case which covers the opening of the upper case and partitions a part of the accommodation space (S) to form an installation space (S2). ### Claim 8 (depends on 7) The cooling device of claim 7, wherein the control module is disposed in the installation space (S2) so as to be shielded from the accommodation space (S). ### Claim 9 (depends on 8) The cooling device of claim 8, further comprising a battery unit disposed in the installation space (S2), wherein: the inner case includes a coolant discharge hole opened to a side where the battery unit is disposed, and the supply valve is disposed to vertically pass through the battery unit and opens and closes the coolant discharge hole while linearly moving so as to mutually seal the accommodation space (S) and the installation space (S2). ### Claim 10 (depends on 9) The cooling device of claim 9, wherein the battery unit includes a shielding flange at a lower end thereof which is hermitically coupled to a lower end of the electrical unit case and a battery case which has a valve installation hole at the center thereof for installing the supply valve and is coupled to the shielding flange. ### Claim 11 (depends on 7) The cooling device of claim 7, wherein: the discharge hole is disposed to extend in a straight line along the upper case and the lower case, and the injection valve rotates between the upper case and the lower case to open and close the discharge hole. ### Claim 12 (depends on 11) The cooling device of claim 11, wherein: the injection valve includes a valve rotary plate which is rotatably disposed along a parting line (P) that separates an inner surface of the upper case from an inner surface of the lower case and which is disposed to overlap with the discharge hole, and the valve rotary plate includes a communication hole which simultaneously communicates with the discharge hole and the accommodation space (S). ### Claim 13 (depends on 1) The cooling device of claim 1, further comprising a guide pipe extending outward from an outer surface of the outer case and configured to guide a moving path of the coolant discharged from the discharge hole. ### Claim 14 (depends on 13) The cooling device of claim 13, wherein the guide pipe has a plurality of ejection holes on a sidewall thereof to eject the coolant. ### Claim 15 A cooling device for preventing spontaneous combustion of coal stockpiles, the cooling device comprising: an outer case having an accommodation space (S) formed therein and having an opening communicating with the accommodation space (S) and a plurality of discharge holes having a predetermined diameter formed on one side thereof; an inner case located in the accommodation space (S) and having a storage space (S1) formed therein in which a liquid coolant is compressed and accommodated at a constant pressure; a supply valve configured to open and close one side of the inner case to discharge the coolant accommodated in the storage space (S1) to the accommodation space (S) when a temperature reaches a predetermined temperature; a backflow prevention valve installed in the discharge hole and configured to open and close the discharge hole to eject the coolant to an outside of the outer case when the coolant is located in the accommodation space (S); and a control module including: a temperature sensor having a portion exposed to the outside of the outer case to measure an external temperature of the outer case; and an opening/closing controller configured to control opening and closing of the supply valve and the backflow prevention valve according to a temperature value measured by the temperature sensor. ### Claim 16 (depends on 1) A system for collecting a cooling device for preventing spontaneous combustion of coal stockpiles of claim 1, the system comprising: a moving belt configured to carry a mixture of the cooling device and coal thereon to move the mixture; and a collecting module positioned above the moving belt and configured to sort the coal and the cooling device and collect the cooling device, wherein the collecting module includes a sorter having one end inserted into the coal to sort the cooling device from the coal, a traction roller configured to transfer the cooling device sorted in the sorter from one side of the sorter to the other side, and a transport roller configured to receive the cooling device transferred by the traction roller and transfer the cooling device to a predetermined area.