JP5196350B2 - Mobile nitrogen gas generator - Google Patents

Description

  The present invention relates to a mobile nitrogen gas generator that extracts nitrogen gas from the atmosphere and compresses it at high pressure.

  Conventionally, as a method of separating and recovering nitrogen gas from the atmosphere and generating nitrogen gas that is compressed under high pressure and injected into a cylinder, for example, a separation membrane type nitrogen separation method, a so-called PSA (Pressure Swing Adsorption) method, or a cryogenic separation method It has been known.

The PSA method uses an adsorbent characteristic, and passes compressed air through an adsorbent, for example, activated carbon, adsorbs a specific gas under a high pressure, and discharges the specific gas under a low pressure. Nitrogen gas can be separated by adsorbing oxygen gas or the like from the compressed air.
In the cryogenic separation method, air is cooled and separated and produced. For example, by cooling the air to about −190 ° C., the temperature difference between the boiling point of nitrogen −195.8 ° C. and the boiling point of oxygen −183.0 ° C. Can be used to extract a large amount of nitrogen gas with high purity.

  In the case where nitrogen gas is generated using these PSA methods and cryogenic separation methods, the apparatus becomes large. For this reason, since the installation place of an apparatus will be limited, installation of an apparatus is difficult, for example in a mountainous area, a desert, etc.

  On the other hand, in the separation membrane type nitrogen separation method, various nitrogen gas generation methods are conventionally known. For example, Patent Literature 1 discloses a gas separation method using a spiral wound hollow fiber permeable membrane cartridge. Patent Documents 2 to 4 disclose a nitrogen gas production apparatus using a separation membrane nitrogen separation method.

Japanese Patent Laid-Open No. 02-111417 JP 2001-261310 A JP 2003-300710 A JP 2003-313014 A

  By the way, in the nitrogen gas separation method and the nitrogen gas production apparatus disclosed in Patent Documents 1 to 4, the apparatus itself is premised on fixed installation, and it is assumed that the apparatus is moved to a place where nitrogen gas is required. Absent. Therefore, it is impossible to move an already installed nitrogen gas production apparatus to a remote place such as a mountainous area or a desert.

For this reason, when using equipment that requires nitrogen gas in remote areas such as mountains and deserts, procure a cylinder into which nitrogen gas has been injected and transport it to the place where the equipment that requires nitrogen gas is installed. There is a need to.
However, since there are various standards for such a cylinder base, it cannot be said that the purchased cylinder base is necessarily compatible with a device that requires nitrogen gas, which may hinder the supply of nitrogen gas.
In addition, supply of nitrogen gas by transporting cylinders is limited in supply amount, and may not be able to cope with a large amount of nitrogen gas required.

Furthermore, when the quality of the nitrogen gas is not good, that is, when water is mixed in the nitrogen gas, the dew point temperature of the nitrogen gas at the time of supply may extremely decrease due to water mixing, It was necessary to remove the water reliably.
Further, since the discharge amount of nitrogen gas depends on the amount of nitrogen gas remaining in the cylinder, that is, the pressure, a sufficient discharge amount may not be obtained.

  In view of the above problems, an object of the present invention is to provide a mobile nitrogen gas generator capable of easily moving to an arbitrary place with a simple configuration.

In order to achieve the above object, a mobile nitrogen gas generator of the present invention includes a drive source, a compression unit that is driven by the drive source and compresses the surrounding atmosphere, and removes impurities from the atmosphere compressed by the compression unit. The air refining unit, the air from which impurities have been removed by the air refining unit are separated by a separation membrane, and the gas separating unit for extracting nitrogen gas, and the pressure increase for increasing the pressure of the nitrogen gas extracted by the gas separating unit And a pedestal portion on which these drive source, compression unit, air conditioning unit, gas separation unit and booster unit are arranged, and the booster unit is connected to the gas separation unit via the air tank and the regulator. Including a gas booster into which nitrogen gas is introduced, and the pressure of the nitrogen gas introduced from the gas separation unit is increased by the gas booster and controlled to stop automatically, and the pedestal unit is moved By置全 body is characterized in that it is installed in any location.
According to this configuration, since the gas separation unit separates the gas by the separation membrane, the gas separation unit itself and the entire nitrogen gas generator are configured in a compact size, and the driving source, the compression unit for generating nitrogen gas, the air conditioner are configured. Since the mass part, the gas separation part and the pressure raising part are respectively arranged on the pedestal part, it is possible to easily move the nitrogen gas generator to any place by moving the pedestal part by transportation, self-propelled, etc. it can.
Then, by operating the nitrogen gas generator installed in an arbitrary place, the ambient air is taken in and compressed by the compression part on the pedestal part, impurities are removed by the air refining part, and then gas separation is performed. The gas is separated by a separation membrane in the section, and nitrogen gas is taken out.
The nitrogen gas taken out in this way is directly supplied to various devices, or in a state in which the nitrogen gas is injected into the bomb, by connecting the bomb to various devices, various types of gas that require high-pressure nitrogen gas at the boosting unit Nitrogen gas can be supplied to the instrument.

Here, when injecting nitrogen gas into a cylinder, by appropriately selecting the cylinder base, the cylinder base can be securely connected to various devices that require nitrogen gas. Nitrogen gas can be reliably supplied to various devices.
Therefore, for example, even in remote areas such as mountainous areas and deserts, nitrogen gas is generated from the atmosphere by moving the entire nitrogen gas generator by the pedestal, and nitrogen gas is required using this nitrogen gas Various devices can be operated.

  In the above configuration, the pedestal part preferably includes wheels, and the pedestal part moves as the wheels roll. According to this configuration, the entire nitrogen gas generator can be installed at a desired location by moving the pedestal portion to an arbitrary location by towing or self-propelled.

  The air refining section may remove dust with a filter and remove moisture with a dryer. According to this configuration, for example, in a desert or a wasteland, it is possible to remove the dust and dirt mixed in the atmosphere and obtain an atmosphere suitable for generating nitrogen gas. Furthermore, since the moisture of the air introduced into the gas separation unit is reduced by removing the moisture by the air refining unit, the moisture is prevented from adhering to the gas separation membrane. Accordingly, it is possible to reduce the reduction in the capacity of the gas separation membrane and to efficiently extract nitrogen gas by the gas separation unit.

In the above configuration, the gas booster preferably comprises a two-stage compression type piston pump. The piston pump is preferably a reciprocating piston pump.
Preferably, the first-stage piston pump and the second-stage piston pump of the gas booster are connected via a connecting pipe. The connecting pipe is preferably provided with a safety valve that opens when the pressure rises abnormally.
According to this configuration, it is possible to easily inject the nitrogen gas whose pressure has been increased by the pressure increasing unit into the cylinder or directly supply the nitrogen gas to various devices that require the nitrogen gas.

  According to the present invention, it is possible to provide a mobile nitrogen gas generator that can be easily moved to an arbitrary place with a simple configuration.

Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings.
FIG. 1 is a diagram showing a configuration of a first embodiment of a mobile nitrogen gas generator according to the present invention, and FIG. 2 is an explanatory diagram showing an operation of the mobile nitrogen gas generator of FIG.
In FIG. 1, the mobile nitrogen gas generator 10 includes a compression unit 11, an air conditioning unit 12, a gas separation unit 13, a boosting unit 14, an output unit 15, and a pedestal unit 16. Yes.

  The compression part 11 is comprised from the commercially available air compressor, takes in the surrounding air | atmosphere, for example, compresses it to a pressure below 1.0 MPa, and sends it out to the air refining part 12 as compressed air.

  The air refining unit 12 removes impurities from the compressed air supplied from the compression unit 11 and sends the impurities to the gas separation unit 13, and specifically includes a filter 12a and a dryer 12b. The filter 12a has a known configuration, and removes dust including dust and dirt from the atmosphere, for example. Note that the filter 12a may be configured as a multi-stage filter having two or more stages that sequentially improve the capturing performance in order to capture particles of various sizes.

  Similarly, the dryer 12b has a known configuration. For example, moisture in the compressed air is condensed by cooling the compressed air, and the condensed moisture is taken out as drain water, or moisture in the compressed air is removed by an adsorbent or a desiccant. Compressed air is dried by adsorption. The dryer 12b includes a discharge port 12c for discharging condensed water (drain water).

  Here, the dryer 12b removes moisture in the air, for example, to set the dew point temperature to about −30 ° C. Thereby, since the moisture in the atmosphere introduced into the gas separation unit 13 is reduced, dew condensation in the gas separation unit 13 can be avoided, and a reduction in the capability of the gas separation unit 13 can be prevented.

  The gas separation unit 13 is composed of a hollow fiber membrane, and oxygen is removed from the atmosphere from which the impurities have been removed by the air refining unit 12 by using the gas separation membrane to separate and take out the nitrogen gas. 14 to send.

  The hollow fiber membrane is configured by bundling, for example, several thousand straw-shaped hollow fibers made of polyester, and by passing compressed air through each hollow fiber, the hollow fiber membrane for each gas component The remaining nitrogen gas can be taken out by separating the gas components such as oxygen, argon, carbon dioxide and the like based on the difference in the permeation rate.

  More preferably, the gas separation unit 13 may remove oxygen in the compressed air by using a deoxygenating unit in combination. In this way, the gas separation unit 13 can take out high-quality nitrogen gas having a purity of, for example, about 99.6 to 99.9%.

  The pressure raising unit 14 is a gas booster having a known configuration, and the pressure of the nitrogen gas from the gas separation unit 13 is increased to, for example, a pressure of about 20.7 MPa.

The output unit 15 is a regulator, for example, and adjusts the nitrogen gas boosted by the boosting unit 14 to an appropriate pressure, and discharges the nitrogen gas through the valve 15a and the nozzle 15b at a discharge amount of about 4 Nm ³ / hour, for example. For example, it can be injected into a cylinder.

  The pedestal portion 16 is configured, for example, as a carriage provided with wheels 16a, and the above-described compression portion 11, air conditioning portion 12, gas separation portion 13, boosting portion 14 and output portion 15 are fixedly arranged. Thereby, the base part 16 can move to arbitrary places by rolling of the wheel 16a.

  Therefore, the nitrogen gas generator main body 17 including the compression unit 11, the air conditioning unit 12, the gas separation unit 13, the boosting unit 14, and the output unit 15 moves integrally to an arbitrary place as the pedestal unit 16 moves. And can operate.

The mobile nitrogen gas generator 10 according to the embodiment of the present invention is configured as described above and operates as follows.
First, the wheel 16a of the pedestal part 16 is rolled to move the pedestal part 16 to a desired place by self-propelled or towing. Thereby, the nitrogen gas generator main body 17 is installed at a desired location.

In this state, the nitrogen gas generator main body 17, that is, the compression unit 11, the air conditioning unit 12, the gas separation unit 13, and the pressurization unit 14 are operated. Thereby, the compression part 11 takes in the surrounding air | atmosphere, compresses, for example, sends the compressed air of pressure less than 1.0 MPa to the air refining part 12.
Subsequently, the air refining unit 12 removes dust, including dust and dirt, from the compressed air sent from the compression unit 11 by the filter 12a, and removes moisture by the dryer 12b, for example, a dew point temperature of −30 ° C. or lower. As shown in FIG.
Next, the gas separation unit 13 separates other gas components such as oxygen from the compressed air from the air refining unit 12 by the hollow fiber membrane, and the remaining nitrogen having a purity of about 99.6 to 99.9% The gas is sent to the pressure increasing unit 14.
Thereby, the pressure | voltage rise part 14 pressurizes the nitrogen gas from the gas separation part 13 to the pressure of about 20.7 MPa, for example.
Finally, the output unit 15 adjusts the nitrogen gas boosted by the boosting unit 14 to, for example, a discharge amount of about 4 Nm ³ / hour by a regulator. Then, an empty cylinder (not shown) is connected to the nozzle 15b, and the valve 15a is opened to inject nitrogen gas into the cylinder.
By transporting the cylinder into which nitrogen gas has been injected in this way to the installation location of the equipment that requires nitrogen gas and connecting the cylinder to these equipment, the nitrogen gas can be used in the equipment. .

  In addition, by moving the pedestal 16 and placing the mobile nitrogen gas generator 10 close to a device that requires nitrogen gas, the nozzle 15b of the output unit 15 is connected to these devices, It is also possible to supply nitrogen gas directly to these devices.

In this way, by forming the gas separation unit 13 using the hollow fiber membrane to separate the nitrogen gas, the gas separation unit 13 and the nitrogen gas generator main body 17 are configured in a small size. Can be easily mounted.
Therefore, the nitrogen gas generator main body 17 can be easily moved to an arbitrary place by rolling the wheel 16a of the base portion 16. Thereby, the nitrogen gas generator main body 17 is moved to a desired place where the nitrogen gas is desired to be generated to generate the nitrogen gas, and the nitrogen gas can be supplied to various devices that require the nitrogen gas.

3 to 6 show the configuration of the second embodiment of the mobile nitrogen gas generator according to the present invention.
3 to 6, the mobile nitrogen gas generator 20 has the same configuration as the mobile nitrogen gas generator 10 shown in FIG. 1, and includes a compression unit 21, an air refining unit 22, and a gas separation unit. 23, a booster unit 24, an output unit 25, and a pedestal unit 26.

The compression part 21 is comprised from the commercially available air compressor similarly to the compression part 11 in the mobile nitrogen gas generator 10 mentioned above, takes in the surrounding air, for example, compresses it to the pressure of less than 1.0 MPa. The compressed air is sent to the air refining unit 22.
Specifically, as shown in FIG. 6, the compression unit 21 drives the air compressor 21b by the drive source 21a to compress the atmosphere, and stores the compressed air in the air tank 21d via the check valve 21c. Alternatively, the compressed air is stored in the air tank 21d from the compressed air source via the connection port 21e and the check valve 21f.
Here, the pressure gauge 21g detects and displays the pressure in the air tank 21d. A drain valve 21h is provided at the bottom of the air tank 21d. As a result, moisture or oil in the compressed air condensed based on the pressure in the air tank 21d and accumulated in the bottom of the air tank 21d is discharged by opening the drain valve 21h, or the compressed air in the air tank 21d is indicated by an arrow A. Drain as shown.

  The compressed air in the air tank 21d is sent to the air refining unit 22 via the gate valve 21i. Here, the gate valve 21i is closed when checking the state (pressure or flow rate) of the compressed air in the air tank 21d. The air tank 21d is provided with a safety valve 21j. The safety valve 21j opens when the pressure in the air tank 21d exceeds a predetermined value, and discharges the compressed air in the air tank 21d.

The air refining unit 22 removes impurities from the compressed air supplied from the compression unit 21 and sends the impurities to the gas separation unit 23. Specifically, as shown in FIG. 6, an air filter 22a and a dryer are provided. As a mist all 22b and a dry space 22c.
The air filter 22a removes moisture, oil, dust including dust and dirt, and more specifically mainly dust in the compressed air to be introduced.

The mist all 22b removes moisture, oil, dust, and more specifically moisture mainly in the introduced compressed air, and drops it into the dry space 22c.
Here, the mist all 22b having, for example, a maximum dew point temperature of −30 ° C. is used. Thereby, for example, a dew point temperature of −60 ° C. of the high-pressure nitrogen gas to be finally supplied can be achieved.

  The dry space 22c receives the moisture removed by the mist all 22b and automatically discharges it as indicated by an arrow B.

  The gas separation part 23 is comprised from the hollow fiber membrane 23a made from a polyimide resin, for example like the gas separation part 13 in the mobile nitrogen gas generator 10 mentioned above. In the gas separation unit 23, for example, as shown in FIG. 6, two hollow fiber membranes 23a are connected in parallel to each other.

As the hollow fiber membrane 23a, for example, a supply pressure of a maximum of 1.0 MPaG, a supply temperature of 5 to 60 ° C., a heat resistant temperature of 80 ° C., and a nitrogen gas generation amount of 3.6 Nm ³ / hour is used. The hollow fiber membrane 23a separates nitrogen gas from the compressed air, for example, nitrogen gas having a purity of about 99.6 to 99.9% is generated, and is sent to the pressure increasing unit 24 via the check valve 23b and the throttle valve 23c. Is done.
The remaining compressed air from which the nitrogen gas has been separated is discharged as shown by arrow C.

  The booster 24 includes a gas booster 24d into which nitrogen gas is introduced from the gas separator 23 through an air tank 24a, a regulator 24b, and a gate valve 24c.

  The air tank 24a temporarily stores the nitrogen gas supplied from the gas separation unit 23 and stabilizes the pressure of the nitrogen gas. Further, the air tank 24a includes a drain valve 24e for releasing the internal nitrogen gas.

  The regulator 24b is a pressure adjusting valve that adjusts the pressure of nitrogen gas supplied from the air tank 24a. The gate valve 24c is closed when checking the state (pressure, flow rate, etc.) of nitrogen gas supplied to the gas booster 24d.

  The gas booster 24d has a well-known configuration and is composed of two-stage compression type reciprocating piston pumps 24f and 24g and air cylinders 24n and 24o. The gas booster 24d is supplied from the gas separation unit 23 using the so-called Pascal principle. The compressed nitrogen gas is compressed to increase the pressure.

  Each piston pump 24f, 24g serves as a drive source, and compressed air from the air refining unit 22 is introduced into the air cylinders 24n, 24o via the regulator 24h, the gate valve 24i, and the throttle valve 24j. As a result, the piston pumps 24f and 24g reciprocate in the left-right direction in the drawing, and the introduced nitrogen gas is boosted by the first-stage piston pump 24f as indicated by the arrow D, and then the two-stage through the connecting pipe 24k. It is sent to the piston pump 24g of the second, further boosted by the piston pump 24g of the second stage, and sent to the output unit 25.

At this time, the pressure of the high-pressure nitrogen gas output from the second-stage piston pump 24g can be controlled by the pressure of the compressed air introduced into the air cylinder 24n. Accordingly, the piston pumps 24f and 24g are automatically stopped by the balance of these pressures, so that the gas booster 24 can be operated and stopped without detecting these pressures by a detector or the like.
The connecting pipe 24k is provided with a safety valve 24l. This safety valve 24l opens when the pressure of the first-stage piston pump 24f rises abnormally and releases the pressurized nitrogen gas.

  The output unit 25 includes two pressure reducing valves 25d and 25e to which the high-pressure nitrogen gas from the pressure increasing unit 24 is supplied via the original pressure reducing valve 25a, the check valve 25b, and the purifier 25c. The two pressure reducing valves 25d and 25e are connected in parallel to the output of the purifier 25c, respectively, and the output side is connected to the supply ports 25f and 25g, respectively. The purifier 25c is provided to remove dust and the like generated in the gas booster 24d of the booster 24 and the like.

Each supply port 25f, 25g is connected to one end of a connection hose 25h, 25i, and the other end of the connection hose 25h, 25i has supply adapters 25l, 25m via gate valves 25j, 25k. Each of the supply adapters 25l and 25m is configured to be connectable to various devices to which nitrogen gas is to be supplied, and can supply nitrogen gas to various devices in a connected state.
Here, the pressure reducing valve 25d is a high pressure pressure reducing valve, for example, and reduces the pressure of the nitrogen gas to 20.6 MPa, for example. Further, the pressure reducing valve 25e is a low pressure pressure reducing valve, for example, and reduces the pressure of the nitrogen gas to 3.45 MPa, for example.

  By the way, safety valves 25n and 25o are provided upstream of the original pressure reducing valve 25a, between the check valve 25b and the purifier 25c, between the pressure reducing valve 25d and the supply port 25f, and between the pressure reducing valve 25e and the supply port 25g, respectively. , 25p, 25q are provided to release the internal nitrogen gas when the pressure increases abnormally.

Furthermore, open valves 25r, 25s, and 25t are provided on the downstream side of the purifier 25c, between the pressure reducing valve 25d and the supply port 25f, and between the pressure reducing valve 25e and the supply port 25g, respectively. After the completion of the operation, the valves are opened and the nitrogen gas remaining inside is released.
The regulator 24h and the safety valves 25o, 25p, and 25q are provided with pressure gauges 24m, 25u, 25v, and 25w, respectively.

  As shown in FIGS. 3 to 5, the pedestal portion 26 is configured as, for example, a carriage provided with four wheels 26 a, and the compression portion 21, the air conditioning portion 22, the gas separation portion 23, and the boosting portion 24 described above. The output unit 25 is fixedly arranged. In the illustrated case, the pedestal portion 26 has, for example, a total length of about 2.5 m and a total width of about 1.65 m, and is configured as a trailer.

  In other words, a connecting arm 26b is provided in the foremost part of the pedestal portion 26. By connecting the connecting arm 26b to a towing vehicle such as a truck, the towing vehicle pulls the pedestal portion 26 when the towing vehicle travels. Can be moved to any location. As a result, the nitrogen gas generator main body 17 including the compression unit 21, the air conditioning unit 22, the gas separation unit 23, the boosting unit 24, and the output unit 25 can be integrated with any place as the pedestal unit 26 moves. Can be moved and operated.

  Further, in the illustrated case, a cover 26c (see FIG. 4) covering the nitrogen gas generator main body 17 is provided on the upper portion of the pedestal portion 26, and each part of the nitrogen gas generator main body 17, that is, the compression unit 21 and the air. The tempering unit 22, the gas separation unit 23, the boosting unit 24, and the output unit 25 are covered, and parts that need to be operated and parts that need to be monitored are attached to the surface of the cover 26c. The cover 26c is configured, for example, as a hood or a metal panel, and reduces or prevents intrusion of dust or the like into the interior.

The mobile nitrogen gas generator 20 having such a configuration operates as follows.
First, the pedestal 26 is pulled by the connecting arm 26b to roll the wheels 26a of the pedestal 26, and the pedestal 26 is moved to a desired location. Thereby, the nitrogen gas generator main body 17 is installed in a desired place.

  In this state, the nitrogen gas generator main body 17 on the pedestal part 26, that is, the compression part 21, the air conditioning part 22, the gas separation part 23, the boosting part 24, and the output part 25 are operated. As a result, the air compressor 21b of the compression unit 21 takes in the surrounding atmosphere and compresses it, for example, stores compressed air having a pressure of less than 0.90 MPa in the air tank 21d, and sends it to the air refining unit 22 via the gate valve 21i. To do.

Subsequently, the air refining unit 22 removes mainly dust including dust and dirt from the compressed air sent from the compression unit 21 by the air filter 22a, and mainly removes moisture by the mist all 22b. It is sent to the gas separation unit 13 at −30 ° C. or lower.
Here, the water removed by the mist all 22b gathers in the dry space 22c and is automatically discharged.
Next, the gas separation unit 23 separates other gas components such as oxygen from the compressed air from the air refining unit 22 by the hollow fiber membrane 23a, and the remaining purity is about 99.6 to 99.9%. The nitrogen gas is sent to the pressure increasing unit 24 through the check valve 23b and the throttle valve 23c.
As a result, the booster 24 boosts the nitrogen gas from the gas separator 23 with the gas booster 24d, and with the first-stage piston pump 24f, for example, the pressure from about 0.6 MPa to about 12.4 MPa, and the second-stage piston. The pressure is increased to, for example, about 30 MPa by the pump 24 g and supplied to the output unit 25.
Finally, the output unit 25 decompresses the nitrogen gas boosted by the boosting unit 24 to about 20.6 MPa, for example, by the main pressure decompression valve 25a, and then the high pressure / pressure through the check valve 25b and the purifier 25c. Supply to two low-pressure systems.

Thereby, in the high-pressure system, the nitrogen gas from the original pressure reducing valve 25a is reduced to, for example, about 20.6 MPa by the reducing valve 25d, and is supplied from the supply port 25f to the supply adapter 25l through the connection hose 25h and the partition valve 25j. Sent out.
Accordingly, the supply adapter 251 is connected to various devices that require nitrogen gas, and the gate valve 25j is opened, whereby high-pressure nitrogen gas is supplied to the various devices.

  In the low pressure system, the nitrogen gas from the original pressure reducing valve 25a is reduced to about 3.45 MPa, for example, by the reducing valve 25e, and is sent from the supply port 25g to the supply adapter 25m via the connection hose 25i and the partition valve 25k. Is done. Accordingly, the supply adapter 25m is connected to various devices that require nitrogen gas, and the gate valve 25k is opened, whereby low-pressure nitrogen gas is supplied to the various devices.

In the above configuration, the supply adapters 25l and 25m of the output unit 25 are directly connected to various devices that require nitrogen gas, and are generated by the compression unit 21, the air conditioning unit 22, the gas separation unit 23, and the boosting unit 24. Although the nitrogen gas thus supplied is supplied to these various devices, it is also possible to supply the nitrogen gas contained in the gas cylinder to these various devices.
For this purpose, the output unit 25 is branched from between the check valve 25b and the purifier 25c, and includes an external connection port 25y via the check valve 25x.

  A gas cylinder 27 filled with nitrogen gas is connected to the external connection port 25y. As a result, the nitrogen gas in the gas cylinder 27 is supplied from the external connection port 25y through the check valve 25x to the high-pressure and low-pressure pressure reducing valves 25d and 25e from the purifier 25c, and further connected to the connection hoses 25h and 25i. Then, nitrogen gas is supplied from the supply adapters 25l and 25m to various devices.

On the other hand, it is also possible to fill the gas cylinder 27 with the nitrogen gas from the nitrogen gas generator main body 17 by connecting the supply adapters 25l and 25m of the high pressure system or the low pressure system to the gas cylinder 27.
By transporting the cylinder into which the nitrogen gas has been injected in this way to the installation location of the equipment that requires the nitrogen gas and connecting the cylinder to these equipment, the nitrogen gas can be used in the equipment.

  As described above, according to the present invention, an extremely excellent mobile nitrogen gas generator that can be easily moved to an arbitrary place with a simple configuration is provided.

  The present invention can be implemented in various forms without departing from the spirit of the present invention. For example, in the above-described embodiment, the gas separation unit 23 is configured by the hollow fiber membrane 23a in order to separate nitrogen gas from compressed air. However, the present invention is not limited to this, and other gas separation means may be used. Is also possible.

It is the schematic which shows the whole structure of 1st embodiment of the mobile nitrogen gas generator by this invention. It is explanatory drawing which shows operation | movement of the mobile nitrogen gas generator of FIG. It is a schematic plan view which shows the structure of 2nd embodiment of the mobile nitrogen gas generator by this invention. It is a schematic side view which shows the mobile nitrogen gas generator of FIG. It is a schematic front view which shows the mobile nitrogen gas generator of FIG. It is a block diagram which shows the detailed internal structure of the mobile nitrogen gas generator of FIG.

Explanation of symbols

10, 20: Mobile nitrogen gas generator 11: Compression unit 12: Air refining unit 12a: Air refining unit filter 12b: Air refining unit dryer 12c: Dryer outlet 13: Gas separation unit 14: Pressure increase Unit 15: output unit 15a: output unit valve 15b: output unit nozzle 16: pedestal unit 16a: pedestal unit wheel 17: nitrogen gas generator body 21: compression unit 21a: compression unit drive source 21b: compression unit Air compressors 21c, 21f: Check valve 21d for compression section: Air tank 21e for compression section: Connection port 21g for compression section: Pressure gauge 21h for compression section: Drain valve 21i for compression section: Gate valve 21j for compression section: Compression section Safety valve 22: air refining part 22a: air refining part air filter 22b: air refining part mist all 22c: air refining part dry space 23: gas separation part 23a: gas Separation part hollow fiber membrane 23b: Gas separation part check valve 23c: Gas separation part throttle valve 24: Booster part 24a: Booster part air tank 24b: Booster part regulator 24c: Booster gate valve 24d: Booster part Gas booster 24e: booster drain valves 24f, 24g: booster reciprocating piston pump 24h: booster regulator 24i: booster gate valve 24j: booster throttle valve 24k: booster connecting pipe 24l: Booster safety valve 24m: Booster pressure gauge 24n, 24o: Booster air cylinder 25: Output unit 25a: Output unit pressure reducing valve 25b: Output unit check valve 25c: Output unit purifier 25d, 25e: Pressure reducing valve 25f, 25g: Output supply port 25h, 25j: Connection hose 25j, 25k: Output gate valve 25l, 25m: Output Supply adapters 25n, 25o, 25p, 25q: safety valves 25r, 25s, 25t of output units: open valves 24m, 25u, 25v, 25w of output units: pressure gauges 25x of output units: check valves 25y of output units: External connection port 26 of output part: pedestal part 26a: pedestal part wheel 26b: pedestal part connecting arm 26c: pedestal part cover 27: gas cylinder

Claims (7)

A driving source;
A compression section that is driven by the drive source and compresses by taking in ambient air;
An air refining unit that removes impurities from the atmosphere compressed by the compression unit;
A gas separation unit for separating nitrogen gas from the atmosphere from which impurities have been removed by the air refining unit, and taking out nitrogen gas;
A pressure increasing unit for increasing the pressure of the nitrogen gas taken out by the gas separation unit;
The drive source, the compression unit, the air conditioning unit, the gas separation unit and the pedestal unit on which the boosting unit is disposed,
The boosting unit includes a gas booster into which nitrogen gas is introduced from the gas separation unit via an air tank and a regulator,
The pressure of nitrogen gas introduced from the gas separation unit is increased by the gas booster and controlled to stop automatically,
The mobile nitrogen gas generator, wherein the entire apparatus can be installed at an arbitrary place by moving the pedestal. The pedestal has wheels,
The mobile nitrogen gas generator according to claim 1, wherein the pedestal portion moves as the wheel rolls.   The mobile nitrogen gas generator according to claim 1 or 2, wherein the air refining unit removes dust with a filter and removes moisture with a dryer. The mobile nitrogen gas generator according to any one of claims 1 to 3, wherein the gas booster comprises a two-stage compression type piston pump . The mobile nitrogen gas generator according to claim 4, wherein the piston pump is a reciprocating piston pump. The mobile nitrogen gas generator according to claim 4, wherein the first-stage piston pump and the second-stage piston pump of the gas booster are connected via a connecting pipe. The mobile nitrogen gas generator according to claim 6, wherein the connecting pipe is provided with a safety valve that opens when the pressure rises abnormally.

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