JP2012021554A - Recovery and re-filling method of fire extinguishing halon gas and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recovery and re-filling method for a fire extinguishing halon gas, which is capable of recovering the fire extinguishing gas at a high recovery rate, and to provide its device.SOLUTION: Liquefied halon is recovered to a liquid recovery tank 5 from a recovery-side vessel 1 filled with the liquefied halon as a fire extinguishing agent and a nitrogen gas as a pressuring gas by using a liquid pump 3, after that, a gaseous component is recovered from the recovery-side vessel 1 to a gas recovery tank 8 by using a vacuum pump 6, and the liquefied halon recovered to the liquid recovery tank 5 and the gaseous component recovered to the gas recovery tank 8 are re-filled into a filling vessel 14.

Description

  The present invention relates to a method and apparatus for recovering and refilling halon gas used as a fire extinguishing agent.

  Conventionally, halon gas typified by halon 1301 and halon 1211 has been used by filling its fire extinguishing equipment such as a fire extinguisher together with nitrogen gas as a fire extinguishing agent using its scientific and thermal properties. And the fire extinguisher and the fire extinguishing equipment filled with the halon gas extract the halon gas filled at the time of periodic inspection.

  At this time, if fluorine-based gas such as halon gas is released to the atmosphere, it will cause destruction of the ozone layer surrounding the earth, so the release of fluorine-based gas into the atmosphere is subject to regulation. Although it has been made, it is not currently manufactured, but it may be continuously installed because it has not expired under the Fire Service Act. And halon 1301 has little damage to the human body during operation like carbon dioxide and does not use water, so it is difficult to replace it with other extinguishing media (electrical equipment installation section, parking lot, books, etc.) In the room, etc., halons that have become unnecessary after being removed or replaced with other fire extinguishing equipment are collected, refined and supplied.

  As for recovering the fluorine-containing gas containing halon, the present applicant first sends the liquefied fluorine-based gas stored in the storage container to the recovery tank with the majority of the liquid component under its own pressure, Next, the gaseous component taken out from the storage container is compressed and then introduced into a cooling liquefaction tank that is cooled with a low-temperature refrigerant to be cooled and liquefied, and this liquefied gas is sent to the recovery tank. Technology (Patent Document 1), a first recovery procedure for recovering most of the liquid components in a recovery tank under self-pressure, and a storage container after completion of the first recovery procedure. A second recovery procedure for separating the fluorine gas and the pressurizing gas component by supplying the gas component and the pressurizing gas component to the cooling liquefaction tank at the internal pressure of the storage container to separate the fluorine gas and the pressurizing gas component; Gas remaining in the storage container And the third recovery procedure for liquefying the fluorine-based gas and the cooling-liquefaction tank by separating the fluorine-based gas and the pressurizing gas by introducing the water into the cooling-liquefaction tank via the suction pump. A fluorine-based gas recovery technique (Patent Document 2) consisting of a fourth recovery procedure for recovering the liquefied gas of the fluorine-based gas liquefied by the second recovery procedure and the third recovery procedure to the liquefaction tank by increasing the temperature was proposed.

Japanese Patent No. 2599086 Japanese Patent No. 2691389

  In the previously proposed fluorine-based gas recovery technology, after the liquid component is taken out from the storage container, the gas component is introduced into the cooling liquefaction tank and liquefied to separate and recover from the pressurizing gas. For this reason, it is possible to recover a large amount of high-purity fluorine-based gas, but there is a problem that the cost for recovery and purification increases, and halons used in fire extinguishers and fire extinguishing equipment are low in concentration. However, it was found that the high-purity recovery was over-specification, and that it was too expensive to use for recovery of fire-fighting gas.

  The present invention provides a fire extinguishing halon gas recovery / refilling method and apparatus capable of recovering the fire extinguishing halon gas at a low cost while having a high recovery rate even if it is made paying attention to such points. For the purpose.

  In order to achieve the above-mentioned object, the present invention as set forth in claim 1 is configured to supply liquefied halon from a recovery source container filled with liquefied halon as a fire extinguishing agent and nitrogen gas as a pressurized gas. The liquid component is recovered in the liquid recovery tank, and then the gas component is recovered from the recovery source container into the gas recovery tank using the vacuum pump. The liquefied halon recovered in the liquid recovery tank and the gas component recovered in the gas recovery tank Is refilled in a filling container.

  In addition to the configuration of claim 1, the present invention described in claim 2 adsorbs the mixed gas of halon gas and nitrogen gas remaining in the pipe after recovery of liquefied halon and gas components. And the halon gas component is adsorbed and recovered, and the filling container is refilled with the halon gas component recovered by the adsorption device together with the liquefied halon and the gas component.

  The present invention described in claim 3 is a liquefied halon recovery path in which a recovery source container filled with liquefied halon as a fire extinguishing agent and nitrogen gas as a pressurized gas and a liquid recovery tank are interposed with a liquid pump. In addition, the recovery source container and the gas recovery tank are connected by a gas component recovery path with a vacuum pump, and a filling pump is installed in the liquefied halon filling path derived from the liquid recovery tank to recover the gas. A compressor is disposed in a gas filling path led out from the tank, and the liquefied halon filling path and the gas filling path are connected in communication with a filling container.

  Further, the present invention as set forth in claim 4 adds the remaining gas recovery path to the liquefied halon recovery path and the gas component recovery path in addition to the configuration of claim 3, and a gas pump, The adsorption device, vacuum pump, buffer tank, compressor, and temporary recovery tank are arranged in this order to absorb and recover the halon gas component from the mixed gas of halon gas and nitrogen gas remaining in the liquefied halon recovery path and gas component recovery path. The halon gas component recovered by the adsorption device is supplied to the gas filling path.

  In the present invention, liquefied halon is recovered from a recovery source container filled with liquefied halon as a fire extinguisher and nitrogen gas as a pressurized gas into a liquid recovery tank using a liquid pump as a liquid, The gas component is recovered from the recovery source container from which the component has been extracted to a gas recovery tank using a vacuum pump, and the recovered container is refilled with the liquefied halon gas, the vaporized halon gas, and the nitrogen gas. Therefore, fire extinguishing halon gas can be recovered at a low cost while maintaining a high recovery rate.

1 is a schematic configuration diagram of a fire extinguishing halon gas recovery / refill facility according to an embodiment of the present invention.

  FIG. 1 shows an embodiment of the present invention. This recovery / refill facility for fire extinguishing halon gas is a recovery source container (1) filled with liquefied halon as a fire extinguishing agent and nitrogen gas as a pressurized gas. A liquefied halon recovery path (4) with a liquid pump (3) is connected to the header (2) communicating with the liquefied halon recovery path (4), and the outlet end of the liquefied halon recovery path (4) is connected to the liquid recovery tank (5). Communication connection is established. A gas component recovery path (7) with a vacuum pump (6) is branched from the liquefied halon recovery path (4) between the header (2) and the liquid pump (3), and this gas component recovery path The lead-out end of (7) is connected to the gas recovery tank (8).

  Since the nitrogen gas dissolved in the liquefied halon is eluted when recovered in the liquid recovery tank (5), it is formed in the upper part of the liquid recovery tank (5) in order to recover this eluted nitrogen gas. The gas phase section and the gas recovery tank (7) are connected in communication by an elution gas transfer path (9).

  A filling pump (11) is disposed in the liquefied halon filling path (10) derived from the liquid recovery tank (5), and a compressor (13) is disposed in the gas filling path (12) derived from the gas recovery tank (7). The liquefied halon filling path (10) and the gas filling path (12) are joined and connected to the filling container (14).

  Further, a residual gas recovery path (15) is connected to a branch portion between the liquefied halon recovery path (4) and the gas component recovery path (7), and a gas pump (16) is connected to the residual gas recovery path (15). , Adsorption device (17), vacuum pump (18), buffer tank (19), compressor (20), temporary recovery tank (21) are arranged in this order, and liquefied halon recovery path (4) and gas component recovery path (7) The adsorbing device (17) recovers the halon gas component from the mixed gas of halon gas and nitrogen gas remaining in the adsorbing device (17). (12) is sent.

  In the figure, reference numeral (22) is a weighing device such as a digital platform scale for measuring the filling amount into the filling container (14), and (23) is a filling loss for collecting the residual gas in the filling path to the filling container (14). It is a collection line.

  Next, a procedure for recovering and refilling the halon fire extinguishing agent when the fire extinguisher is inspected using the fire extinguishing halon gas recovery and refilling facility configured as described above will be described.

  The collection source container (1) filled with a plurality of halon extinguishing agents is connected to the header (2). Next, the flow opening / closing valve (V1) and the liquid pump (3) disposed on the upstream side of the liquid pump (3) of the liquefied halon recovery path (4) connected to the header (2) and the liquid recovery The flow path opening / closing valve (V2) arranged between the tank (5) and the liquid pump (3) are both opened to liquefy halon from the recovery source container (1). To recover.

  When the recovery of the liquid component in the recovery source container (1) is completed, both the on-off valves (V1) (V2) of the liquefied halon recovery path (4) are closed and the vacuum pump (6) of the gas component recovery path (7) is closed. ) And the flow path opening / closing valve (V4) disposed between the vacuum pump (6) and the gas recovery tank (7), which are disposed upstream of the gas recovery tank, respectively. Then, the vacuum pump (6) is operated, and the mixed gas of halon gas and nitrogen gas remaining in the recovery source container (1) is pulled to a point where it can be pulled and recovered in the gas recovery tank (7), and the both-path open / close valve Close (V3) and (V4).

  Then, the gas pump (16) attached to the residual gas recovery path (15) is operated to introduce the mixed gas remaining in the pipe after the gas component recovery operation into the adsorption device (17), and then into the adsorption device (17). The adsorbent (for example, activated carbon) filled in selectively adsorbs the halon gas in the residual gas and releases nitrogen gas. Next, the vacuum pump (18) is operated to release the halon gas from the adsorbent, and the released halon gas is stored in the buffer tank (19) and pressurized by the compressor (20) to temporarily collect the tank (21). Collected and stored.

  The liquefied halon recovered in the liquid recovery tank (5) and the mixed gas of halon gas and nitrogen gas recovered in the gas recovery tank (7) are used for filling consisting of a fire extinguisher container that has been inspected or a new fire extinguisher container. After supplying a predetermined volume of liquefied halon to the container (14), the mixed gas is filled at a predetermined gas pressure.

  As described above, in this fire extinguishing halon gas recovery and refilling facility, the liquefied halon and pressurized gas that have been filled in the fire extinguishing facility such as a fire extinguisher are separated into a liquid component and a gas component, and the recovered liquid is recovered. Can be recovered with a high yield of, for example, 99.99% and the same mixing with the mixed gas in the fire extinguisher container as the recovery source A proportion of the gas mixture can be refilled.

  The present invention can be used for refilling during inspection of a halon fire extinguisher.

  DESCRIPTION OF SYMBOLS 1 ... Collection | recovery origin container, 3 ... Liquid pump, 4 ... Liquefaction halon recovery path, 5 ... Liquid recovery tank, 6 ... Vacuum pump, 7 ... Gas component recovery path, 8 ... Gas recovery tank, 10 ... Liquefaction halon filling path, 11 ... filling pump, 12 ... gas filling path, 13 ... compressor, 14 ... filling container, 15 ... residual gas recovery path, 16 ... gas pump, 17 ... adsorption device, 18 ... vacuum pump, 19 ... buffer tank, 20 ... compressor , 21 ... Temporary collection tank.

Claims (4)

For extinguishing fires, liquefied halon is recovered from the recovery source container (1) filled with liquefied halon as extinguishing agent and nitrogen gas as pressurized gas, and the recovered halon gas is refilled into the filling container (14). A method for recovering and refilling halon gas,
After recovering liquefied halon from the recovery source container (1) filled with liquefied halon as extinguishing agent and nitrogen gas as pressurized gas to the liquid recovery tank (5) using the liquid pump (3) The gas component is recovered from the extinguishant container (1) to the gas recovery tank (8) using the vacuum pump (6), and the liquefied halon recovered to the liquid recovery tank (5) and the gas recovery tank (8). A method for recovering and refilling fire-fighting halon gas, wherein the recovered gas component is refilled into a filling container (14).   After recovery of liquefied halon and gas components, the mixed gas of halon gas and nitrogen gas remaining in the pipe is introduced into the adsorption device (17) to absorb and recover the halon gas components, and the halon gas recovered by the adsorption device (17) The method for recovering and refilling fire-fighting halon gas according to claim 1, wherein the components are refilled in the filling container (14). For extinguishing fires, liquefied halon is recovered from the recovery source container (1) filled with liquefied halon as extinguishing agent and nitrogen gas as pressurized gas, and the recovered halon gas is refilled into the filling container (14). Halon gas recovery and refilling device,
Liquefied halon recovery in which a recovery source container (1) and a liquid recovery tank (5) filled with liquefied halon as a fire extinguishing agent and nitrogen gas as a pressurized gas are provided via a liquid pump (3) In addition, the recovery container (1) and the gas recovery tank (8) are connected to each other by a gas component recovery path (7) with a vacuum pump (6). 5) The liquefied halon filling path (10) derived from 5) is provided with a filling pump (11), and the gas filling path (12) derived from the gas recovery tank (8) is provided with a compressor (13). A method for recovering and refilling fire extinguishing halon gas, characterized in that a liquefied halon filling path (10) and a gas filling path (12) are connected in communication with a filling container (14).   A residual gas recovery path (15) is connected to the liquefied halon recovery path (4) and the gas component recovery path (7), and a gas pump (16), an adsorption device (17), a vacuum pump are connected to the residual gas recovery path (15). (18), Buffer tank (19), Compressor (20), Temporary recovery tank (21) are arranged in this order. Halon gas and nitrogen remaining in liquefied halon recovery path (4) and gas component recovery path (7) The halon gas component is adsorbed and recovered from the gas mixture gas by the adsorption device (17), and the halon gas component collected by the adsorption device (17) is sent to the gas filling passage (12). Firefighting halon gas recovery and refilling equipment.

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