JP2006192417A - Feeding method and feeding apparatus of oxygen gas - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a trouble that connecting of a hose is released in an emergency and the problem whether oxygen can be secured in a course of shelter, although in using of an oxygen cylinder, it is necessary to give attention to a residual amount of oxygen gas in the cylinder and exchange the used cylinder with a cylinder packed with oxygen gas when oxygen gas in the cylinder is thoroughly used, and then in using a PSA method and a membrane separation method, it is necessary to always make equipment one size larger as an amount of pressure drop by a hose. <P>SOLUTION: A feeding apparatus of oxygen gas is arranged with a gas-separation hollow-fiber membrane 50 for separating a wet oxygen-rich gas having a high concentration by introducing a compressed air and a carbon dioxide absorbing tank 70 for removing the carbon-dioxide gas contained in the oxygen rich gas. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method and apparatus for supplying oxygen gas. More specifically, the present invention relates to a construction site in a underground or tunnel where oxygen gas is diluted, heavy work, and high temperature heat generation. The present invention relates to a method and an apparatus for supplying oxygen gas in a place that requires oxygen-enriched gas that contains more oxygen than air at a blast furnace, a smelting site, a welding site, or a place where toxic gas is generated. .

  Conventionally, as a technique related to an oxygen gas supply method and supply apparatus, an oxygen cylinder is generally used, but a PSA method or a membrane separation method is also used.

  Among them, an oxygen cylinder was obtained by the following method. That is, when oxygen is generated at the anode by electrolysis of water or when the air is cooled to around −190 ° C., the boiling point of nitrogen is −195.8 ° C. and the boiling point of oxygen is −183.0 ° C. Therefore, oxygen gas can be obtained by separating nitrogen gas and oxygen gas. Accordingly, it is possible to create an oxygen cylinder by filling the oxygen gas obtained in this way, but a large-scale facility is required.

  On the other hand, the PSA method is an abbreviation for Pressure Swing Adsorption, which allows compressed air to pass through an adsorbent that is a kind of activated carbon, adsorbs a specific gas under a high pressure, and discharges a specific gas under a low pressure. This is a method of separating nitrogen gas and oxygen gas by adsorbing oxygen gas or the like from compressed air, utilizing the characteristics of the adsorbent. In this case, the principle is the same as that of a heatless dryer, the apparatus is a two-cylinder type and larger than the membrane separation type, and a maintenance load such as a solenoid valve is applied.

  In the membrane separation method, compressed air is fed into a hollow fiber membrane that is a hollow fiber polymer membrane, and nitrogen gas and oxygen are utilized by utilizing the difference in permeation amount of each gas component contained in the compressed air. This is a method for separating gases. In this case, it has an advantage that it is smaller than the PSA method and has a smaller maintenance load.

  However, in the case of the PSA method or the membrane separation method, the oxygen-enriched gas produced while supplying compressed air by various methods is generally installed in a place where oxygen gas is required and several tens of meters. As an example, when trying to secure a pressure of 0.3 MPa, when using a hose with an inner diameter of 8 mm with the hose wound around a hose reel, It changes to 300 L / min for 20 m, 170 L / min for a 60 m hose, and 120 L / min oxygen gas for a 100 m hose. Therefore, it is necessary to enlarge the equipment for obtaining oxygen-enriched gas by the PSA method or the membrane separation method, and shorten the length of the hose. It was said to ideal.

  It is also conceivable to fill the oxygen cylinder with oxygen gas by the PSA method or the membrane separation method.

  However, the conventional oxygen gas supply method and supply apparatus have the following problems.

  First, in the case of an oxygen cylinder, it is necessary to always pay attention to the remaining amount of oxygen gas in the cylinder. Of course, when the oxygen gas in the cylinder has been used up, it has been necessary to replace it with an oxygen cylinder filled with oxygen gas.

  Next, in the case of the PSA method or the membrane separation method, the oxygen gas is supplied by placing equipment near the place where the oxygen gas is needed. It was necessary to connect with a hose. In that case, oxygen gas is supplied to the place where it is needed by a hose. However, it is necessary to always increase the size of the PSA system or membrane separation system equipment as a part of the pressure loss caused by passing through the hose. It was.

  Also, the use of hoses means that it is bothersome to disconnect the hose when trying to leave the work site during an emergency evacuation in the event of a fire or lack of oxygen. There was a problem of whether oxygen could be secured.

  In the method of supplying oxygen gas, the present invention is capable of separating a wet oxygen-enriched gas having a high concentration by introducing compressed air into the gas separation hollow fiber membrane 50. For the purpose of minimizing pressure loss after separating the enriched gas, at least the gas separation hollow fiber membrane 50 is supported on the back, and the compressed air is further supplied to the air compressor 10. Further, the compressed air is obtained by connecting to the compressed air storage tank 20, and the compressed air storage tank 20 is also the gas separation hollow fiber membrane. 50, and further, carbon dioxide in the oxygen-enriched gas is removed by the carbon dioxide absorption means 70, and further, the gas separation is performed. The remaining nitrogen gas 112 separated from the oxygen-enriched gas by the hollow fiber membrane 50 is used by the nitrogen gas using means 210. Furthermore, the nitrogen gas using means 210 is used for cooling purposes. The above-described problem is solved by sending the remaining nitrogen gas 112 into the work clothes 210.

  The present invention also includes a gas separation hollow fiber membrane 50 that separates a wet oxygen-enriched gas having a high concentration by introducing compressed air in the oxygen gas supply device, and is included in the oxygen-enriched gas. A carbon dioxide absorption tank 70 for removing carbon dioxide gas is provided, and further, the compressed air is obtained by being connected to the compressor 10 or the compressed air storage tank 20, and further, The carbon dioxide absorption tank 70 is filled with lime water or zeolite, and further, the oxygen-enriched gas storage tank 80 for storing the gas separation hollow fiber membrane 50 and the oxygen-enriched gas. The gas separation hollow fiber membrane 50 and the compressed air storage tank 20 for storing compressed air constitute an integral part 101, 102, and the pressure loss after separating the oxygen-enriched gas is minimized. For the purpose of limiting, it is possible to move the integrated parts 101, 102 by carrying them back together by mounting tools 203, 204, and further from the gas separation hollow fiber membrane 50 to the oxygen-enriched gas. The remaining nitrogen gas 112 from which the gas is separated is sent to the work garment 210 which constitutes the upper garment 211, the scab 212 and the belt 216 for cooling purposes, and which blocks gas in and out at the wrist, ankle and neck. Nitrogen gas 112 is fed into the upper garment 211 from an inflow hole 217 located at the neck of the upper garment 211, and the nitrogen gas 112 inside the upper garment 211 is sent to the upper part of the belt 216 of the upper garment 211. The scab side joint located in the lower part of the belt 216 of the stub 212 through the nitrogen gas flow pipe 213 from the upper joint side joint 214 located in 215, it is sent to the inside of the scab 212, and the nitrogen gas 112 inside the stub 212 is configured to be discharged from a discharge hole 218 located at the knee portion of both legs, The air filter 30 is disposed upstream of the gas separation hollow fiber membrane 50, and the flow rate adjusting valve 55 is disposed downstream, thereby solving the above-described problem.

  As is clear from the above description, the present invention can provide the following effects.

  First, oxygen is enriched by introducing compressed air into the gas separation hollow fiber membrane and allowing the gas separation hollow fiber membrane to move while separating and taking out the highly concentrated wet oxygen enriched gas. Oxygen-enriched gas can be separated where gas is required, and a hose that supplies compressed air is required, but a hose that supplies oxygen-enriched gas that is a source of pressure loss is not required. Even with the same compressor, the oxygen gas supply device can be made as small as possible.

  Secondly, the compressed air can be supplied with a stable oxygen gas by securing a large amount of compressed air by connecting with an air compressor.

  Thirdly, by removing carbon dioxide from the oxygen-enriched gas separated by the gas separation hollow fiber membrane by means of carbon dioxide absorption means, it has become possible to create a body-friendly oxygen-enriched gas.

  Fourth, when compressed air is obtained by connecting to an air compressor, the body-friendly oxygen-enriched gas from which carbon dioxide has been removed by the carbon dioxide-absorbing means is stored in an oxygen-enriched gas storage tank. However, it became possible to secure oxygen-enriched gas during evacuation in an emergency.

  Fifth, when the compressed air is obtained by connecting with the compressed air storage tank, the compressed air storage tank is also carried along with the gas separation hollow fiber membrane, so that a highly mobile oxygen gas supply device becomes possible. It was.

  Sixth, the remaining large amount of nitrogen gas separated from the oxygen-enriched gas by the gas separation hollow fiber membrane is sent to the inside of the work clothes for cooling purposes, or the nitrogen gas is sent in and the air is shut off to prevent oxidation. It can also be used for the purpose of preventing combustion.

  Seventh, an air filter is disposed upstream of the gas separation hollow fiber membrane, and a flow rate adjusting valve is disposed downstream of the gas separation hollow fiber membrane so that a part of the compressed air is combined with oxygen gas. It has become possible to extend and obtain oxygen-enriched gases of various concentrations.

Embodiments of an oxygen gas supply method and supply apparatus according to the present invention will be described below in detail with reference to the drawings.
Here, FIG. 1 is a system diagram when a compressor is used as the compressed air of the present invention, FIG. 2 is a configuration diagram when a compressor is used as the compressed air of the present invention, and FIG. FIG. 4 is a system diagram in the case of using a compressed air storage tank as the compressed air of the present invention, and FIG. 5 uses the compressed air storage tank as the compressed air of the present invention. FIG.

(First Example)
As shown in FIG. 1, reference numeral 111 denotes air, and compressed air is created by being sucked by the air compressor 10. Therefore, the produced compressed air is sent to the compressed air pipe 121.

  Here, the compressed air is a one-touch type with a compressed air pipe 121, an on-off valve 31 that is manually opened and closed, a compressed air pipe 122, an air filter 30 that removes foreign matter in the compressed air, and a compressed air pipe 123. There are joints 32 and 51 having a check valve function on the downstream side, a compressed air pipe 124, a pressure reducing valve 52 for reducing the pressure of the compressed air, and a gas separation hollow through the compressed air pipe 125. It flows into the thread membrane 50.

  In this case, a pressure gauge 53 capable of measuring the pressure of the compressed air flowing through the compressed air pipe 125 is disposed in the middle of the compressed air pipe 125.

  Further, the gas separation hollow fiber membrane 50 separates into oxygen-enriched gas and nitrogen gas, and the oxygen-enriched gas removes carbon dioxide mixed in the oxygen-enriched gas pipe 141 and the oxygen-enriched gas. The carbon dioxide absorption tank 70, which is also the absorption means 70, the oxygen-enriched gas pipe 142, the oxygen-enriched gas storage tank 80 for storing the oxygen-enriched gas, the oxygen-enriched gas pipe 143, and the reduced pressure of the oxygen-enriched gas The oxygen-enriched gas 113 can be sent out via the pressure reducing valve 81, the oxygen-enriched gas pipe 144, the on-off valve 83 that is manually opened and closed, and the oxygen-enriched gas pipe 145.

  In this case, an oxygen concentration meter pipe 151 is located in the middle of the oxygen enriched gas pipe 142. The oxygen concentration meter pipe 151 includes an on-off valve 71 that can be manually opened and closed, an oxygen concentration meter pipe 152, and a terminal. Is connected to an oxygen concentration meter 72 so that the oxygen gas concentration of the oxygen-enriched gas flowing through the oxygen-enriched gas pipe 142 can be measured.

  A pressure gauge 82 that can measure the pressure of the oxygen-enriched gas flowing through the oxygen-enriched gas pipe 144 is disposed in the middle of the oxygen-enriched gas pipe 144.

  On the other hand, the nitrogen gas is a nitrogen gas pipe 131, an on-off valve 54 that is manually opened and closed, a nitrogen gas pipe 132, and oxygen that is the center of oxygen-enriched gas or nitrogen gas by adjusting the flow rate of nitrogen gas. The nitrogen gas 112 can be sent out through a flow rate adjusting valve 55 that functions to influence the concentration of the gas or nitrogen gas and the nitrogen gas pipe 133.

  The gas separation hollow fiber membrane 50 is made of polyester and is made of a bundle of thousands of straw-shaped hollow fibers. A gas in which various gases such as compressed air are mixed inside the hollow fiber. By passing through, the difference in the permeation speed of the hollow fiber membrane inherent in each gas can be separated by leaving the most abundant nitrogen gas in the air. It is.

  In this case, the gas components constituting the compressed air release quickly by using the difference in permeation amount (from the viewpoint of release) with respect to the hollow fiber membrane which is the gas separation hollow fiber membrane 50. However, most of the remaining gas that is difficult to release is nitrogen gas. In particular, when the hollow fiber membrane is made of polyester, water vapor is most permeable, hydrogen gas and helium gas are most permeable, and finally oxygen gas, carbon dioxide gas, argon gas and nitrogen gas are most permeable. This is a gas that is most difficult to permeate nitrogen gas, and a gas centered on nitrogen gas remains.

  Therefore, in the compressed air that has passed through the gas separation hollow fiber membrane 50, a gas centered on nitrogen gas containing a small amount of argon gas, oxygen gas, or carbon dioxide as an impurity is fed into the nitrogen gas pipe 131. Yes. Further, from the gas separation hollow fiber membrane 50, an oxygen-enriched gas containing more oxygen gas than air is sent into the oxygen-enriched gas pipe 141.

  On the other hand, when the compressed air passes through the gas separation hollow fiber membrane 50, considering the change in temperature, the higher the temperature, the higher the performance of separating oxygen gas, the higher the purity of nitrogen gas, and the temperature does not change In addition, the purity of the generated nitrogen gas depends on the pressure and time of the compressed air, that is, the flow rate. Therefore, although not specifically illustrated, it can be said that providing a device for heating the compressed air upstream is a very effective method for improving the performance of separation of nitrogen gas and oxygen gas.

  As the hollow fiber membrane, in addition to polyester, resins such as polyimide, polyolefin, and polypropylene are also conceivable.

  On the other hand, a variable flow rate adjusting valve 55 that can change the flow rate of the flowing nitrogen gas is disposed downstream of the nitrogen gas pipe 131. Naturally, when the flow rate adjustment valve 55 is throttled to reduce the flow rate of nitrogen gas, the concentration of nitrogen gas, which is mainly nitrogen gas flowing through the nitrogen gas pipe 131, increases. That is, mixing of oxygen gas is reduced. On the other hand, the oxygen gas concentration of the oxygen-enriched gas flowing through the oxygen-enriched gas pipe 141 increases. Naturally, the concentration of carbon dioxide increases.

  Further, the carbon dioxide absorption tank 70, which is also a carbon dioxide absorption means 70 having a function of removing carbon dioxide mixed in the oxygen enriched gas, is filled with lime water, and oxygen enriched with carbon dioxide mixed therein. When the gas passes through, the reaction shown in [Equation 1] is carried out, while water-insoluble calcium carbonate is produced and becomes cloudy. In this case, if carbon dioxide gas is further passed through, the reaction shown in [Equation 2] is carried out, while water-soluble calcium hydrogen carbonate is produced and the cloudiness disappears.

Number 1

Ca (OH) ₂ + CO ₂ → CaCO ₃ + H ₂ O

Number 2

CaCO ₃ + CO ₂ + H ₂ O → Ca (HCO ₃ ) ₂

  However, in addition to filling lime water, the carbon dioxide absorption tank 70 is simply filled with water, filled with zeolite, filled with lithium hydroxide, or filled with ceramics that absorb carbon dioxide. Is also possible. However, it can be said that it is desirable to use at 450 to 700 ° C. in the case where ceramics that absorb carbon dioxide are filled. In addition, when only water is filled, it is desirable to discharge the oxygen-enriched gas into the water as microbubbles of oxygen-enriched gas bubbles by a pump that mixes gas and liquid or other methods.

  In this case, the carbon dioxide absorption tank 70, which is the carbon dioxide absorption means tank 70, is disposed as shown in FIG. 1, in which oxygen enrichment after separation of nitrogen gas and oxygen enriched gas by the gas separation hollow fiber membrane 50 is performed. Although gas is targeted, it may be when the air 111 is sucked by the air compressor 10 or may be just before the compressed air is sent to the gas separation hollow fiber membrane 50.

  Furthermore, the oxygen-enriched gas storage tank 80 for storing the oxygen-enriched gas has experienced an emergency such as a fire or lack of oxygen at the work site where the oxygen gas supply device of the present invention is used. In this case, by disengaging the joints 32 and 51, the joint 51, the compressed air pipe 124, the pressure reducing valve 52, the compressed air pipe 125, and the gas separation hollow fiber membrane constituting the integrated part 101 are formed. 50, pressure gauge 53, oxygen-enriched gas pipe 141, carbon dioxide absorption tank 70, oxygen-enriched gas pipe 142, oxygen-enriched gas storage tank 80, oxygen-enriched gas pipe 143, and pressure reducing valve 81, oxygen-enriched gas pipe 144, on-off valve 83, oxygen-enriched gas pipe 145, oxygen concentration meter piping 151, on-off valve 71, oxygen concentration meter piping 152, oxygen concentration meter 72, pressure Total 82, nitrogen gas pipe 131, and on-off valve 5 When, with the nitrogen gas pipe 132, a flow control valve 55 is of the entire nitrogen gas piping 133 from work site while carrying back together into one so that the can move to a safe location.

  At that time, the oxygen-enriched gas stored in the oxygen-enriched gas storage tank 80 is required for a short period of time due to the need for oxygen supply while moving to a safe place. It is prepared so that gas can be supplied.

  This will be described with reference to FIG. 2. Although only a part of the integrated portion 101 is specifically shown, the joint 51, the gas separation hollow fiber membrane 50, and the oxygen-enriched gas storage tank 80 are shown. The oxygen-enriched gas 113 shown in FIG. 1 is sent to the mask 202. Further, the entire integrated portion 101 can be attached to the body of one worker by the attachment tool 203, and the oxygen-enriched gas 113 can be sucked while working. As is clear from the fact that the compressed air pipe 123 is wound around the hose reel 201, the compressed air pipe 123 is a very long hose, and the joints 32 and 51 are movable at the integrated part 101 as a boundary. It is.

  Further, FIG. 3 shows an operator who carries the entire integral part 101. In this case, the integrated part 101 is hidden because it is located on the back, and only the compressed air pipe 123 that is connected to the integrated part 101 and is not included in the integrated part 101 is visible.

  As the nitrogen gas using means 210 using the nitrogen gas 112, the nitrogen gas 112 is sent into the inner side of the work garment 210 constituted by the upper garment 211, the scab 212 and the belt 216 for the purpose of cooling. The wrist, ankle, and neck of the Yuzubon 212 are made of rubber and the like so as to block gas from entering and exiting the upper garment 211. Then, with the work garment 210 on, the nitrogen gas 112 is sent into the upper garment 211 from the inflow hole 217 located at the neck of the upper garment 211, and the nitrogen gas 112 inside the upper garment 211 is sent to the belt of the upper garment 211. From the upper garment-side joint 214 located at the upper part of the belt 216, through the nitrogen gas flow pipe 213, from the lower-side joint 215 located at the lower part of the belt 216 to the inner side of the scab 212. The nitrogen gas 112 inside the basin 212 is configured to be discharged to the outside through a discharge hole 218 located at the knee portions of both feet.

  In this case, the material of the work clothes 210 may be cotton, hemp, or synthetic fiber. However, a material that does not leak air is preferable, and a material that is coated so that air does not leak is more preferable. In addition, depending on the purpose, a material suitable for a fire is good.

  In addition to the working clothes 210 for cooling purposes, the nitrogen gas using means 210 may be used for the purpose of preventing oxidation and combustion by sending nitrogen gas and shutting off the air.

  The method and apparatus for supplying oxygen gas according to the present invention is configured as described above, and the operation thereof will be described below.

  First, the pressure reducing valves 52 and 81 are set to a predetermined pressure, and the on-off valves 31, 54, 71, and 83 are opened. Therefore, when the air compressor 10 is operated, the air 111 is sucked to generate compressed air, and the generated compressed air can be sent to the compressed air pipe 121.

  Therefore, the compressed air is compressed air pipe 121, on-off valve 31, compressed air pipe 122, air filter 30, compressed air pipe 123, joints 32 and 51, compressed air pipe 124, and pressure reducing valve 52. The gas separation hollow fiber membrane 50 is fed through the compressed air pipe 125.

  By the way, in the gas separation hollow fiber membrane 50, the components of each gas constituting the compressed air can be quickly utilized by utilizing the difference in the gas permeation amount of the hollow fiber membrane constituting the gas separation hollow fiber membrane 50. Among the gas that is released and the gas that is difficult to release, most of the remaining gas that is difficult to release is nitrogen gas. In particular, when the hollow fiber membrane is made of polyester, water vapor is most permeable, hydrogen gas and helium gas are most permeable, and finally oxygen gas, carbon dioxide gas, argon gas and nitrogen gas are most permeable. This is a gas that is most difficult to permeate nitrogen gas, and a gas centered on nitrogen gas remains.

  Thus, the compressed air is separated into oxygen-enriched gas and nitrogen gas, and the oxygen-enriched gas is oxygen-enriched gas pipe 141, carbon dioxide gas absorption tank 70, oxygen-enriched gas pipe 142, and oxygen-enriched gas. The oxygen-enriched gas 113 can be sent out via the gas storage tank 80, the oxygen-enriched gas pipe 143, the pressure reducing valve 81, the oxygen-enriched gas pipe 144, the on-off valve 83, and the oxygen-enriched gas pipe 145. It is like that.

  Further, the nitrogen gas can be sent out through the nitrogen gas pipe 131, the opening / closing valve 54, the nitrogen gas pipe 132, the flow rate adjusting valve 55, and the nitrogen gas pipe 133.

  Under such circumstances, the operator first activates the air compressor 10 and adjusts the flow rate adjustment valve 55 to ensure that the oximeter 72 has a predetermined concentration and then uses the oxygen-enriched gas in earnest. Will do. In this case, generally, the components of air are 78% nitrogen gas, 21% oxygen gas, 1% argon gas and 0.03% carbon dioxide gas, and the present invention is compressed air of such components. The concentration of oxygen gas is to be increased by removing nitrogen gas from the atmosphere, but the concentration of carbon dioxide gas is also increased at the same time, so the carbon dioxide absorption tank 70 is provided to remove carbon dioxide. It is.

  As an example, by supplying compressed air having a pressure of 0.7 MPa and a flow rate of 45 L / min, an oxygen-enriched gas having an oxygen gas concentration of 36 to 42% and a generation amount of 11 to 15 L / min is obtained. Can be obtained. However, in the present invention, it is not necessary to be limited to such numerical values, and other values can be set quite freely.

  On the other hand, the oxygen-enriched gas storage tank 80 is effective when an emergency such as a fire or lack of oxygen has to leave the work site when the oxygen gas supply device of the present invention is used. It is provided so that the oxygen-enriched gas can be continuously supplied while moving from the work site to a safe point.

  Therefore, as shown in FIG. 1, the integrated portion 101 constituting the gas separation hollow fiber membrane 50 and the oxygen-enriched gas storage tank 80 and the like is collectively and collectively assembled by the mounting tool 203 as seen in FIG. You can move on your back. In this case, the integral part 101 can also send the oxygen-enriched gas 113 into the mask 202.

  As a matter of course, the integral part 101 is configured such that the joints 32 and 51 can be detached, and the on-off valves 54 and 83 are closed before the joints 32 and 51 are detached. In other words, since the joint 51 has a check valve function, even if the joints 32 and 51 are separated, the oxygen-enriched gas is stored in the integral part 101 around the oxygen-enriched gas storage tank 80. It is possible to do that.

  In addition, since the operator can move from the work site while carrying the entire integral part 101 on the back, the oxygen-enriched gas can be generated by opening the on-off valve 83 during the movement for a short time. It can be sucked freely. In particular, if the storage pressure of the oxygen-enriched gas storage tank 80 is set high, it is possible to ensure a longer-time oxygen-enriched gas.

  The compressed air pipe 123 connected to the joint 32 is wound around the hose reel 201. Therefore, it can be said that the parts of the joints 32 and 51 can be moved to a free place.

  Further, the remaining nitrogen gas 112 from which the oxygen-enriched gas is separated from the gas separation hollow fiber membrane 50 constitutes an upper garment 211, a scab 212 and a belt 216 for the purpose of cooling the body, as seen in FIG. It is also possible to send it to the work clothes 210 in which the gas entry / exit can be blocked at the wrist, ankle and neck.

  To describe this in more detail, the nitrogen gas 112 is fed into the upper garment 211 from the inflow hole 217 located at the neck portion of the upper garment 211, and the nitrogen gas 112 inside the upper garment 211 is sent to the belt 216 of the upper garment 211. From the upper garment-side joint 214 located in the upper part, the nitrogen gas flow pipe 213 is passed through and the inner side of the basin 212 is sent from the lower side joint 215 located in the lower part of the belt 216 of the basin 212, Cooling is enabled by exhausting the nitrogen gas 112 inside the stub 212 from the exhaust holes 218 located at the knee portions of both legs.

(Second embodiment)
As shown in FIG. 4, 20 is a compressed air storage tank, which stores compressed air by some means. Therefore, the stored compressed air is sent to the compressed air pipe 126.

  Here, the compressed air is compressed air piping 126, a pressure reducing valve 21 that reduces the pressure of the compressed air, a compressed air piping 127, an on-off valve 31 that is manually opened and closed, a compressed air piping 128, and the compressed air. It flows into the gas separation hollow fiber membrane 50 via the air filter 30 for removing foreign substances and the compressed air pipe 129.

  In this case, a pressure gauge 22 capable of measuring the pressure of the compressed air flowing through the compressed air pipe 127 is disposed in the middle of the compressed air pipe 127.

  Further, the gas separation hollow fiber membrane 50 separates into oxygen-enriched gas and nitrogen gas, and the oxygen-enriched gas removes carbon dioxide mixed in the oxygen-enriched gas pipe 141 and the oxygen-enriched gas. The oxygen-enriched gas 113 can be sent out via the carbon dioxide absorption tank 70 which is also the absorption means 70, the oxygen-enriched gas pipe 146, the on-off valve 83 which is manually opened and closed, and the oxygen-enriched gas pipe 145. ing.

  In this case, an oxygen concentration meter pipe 151 is located in the middle of the oxygen enriched gas pipe 146. The oxygen concentration meter pipe 151 includes an on-off valve 71 that can be manually opened and closed, an oxygen concentration meter pipe 152, and a terminal. The oxygen concentration meter 72 is connected to the oxygen enriched gas pipe 146 so that the oxygen gas concentration of the oxygen enriched gas flowing through the oxygen enriched gas pipe 146 can be measured.

  A pressure gauge 82 that can measure the pressure of the oxygen-enriched gas flowing through the oxygen-enriched gas pipe 146 is disposed in the middle of the oxygen-enriched gas pipe 146.

  On the other hand, the nitrogen gas functions to influence the purity of the oxygen-enriched gas and the nitrogen gas by adjusting the flow rate of the nitrogen gas piping 131, the on-off valve 54 that is manually opened and closed, the nitrogen gas piping 132, and the flow rate of the nitrogen gas. The nitrogen gas 112 can be sent out through the flow rate adjusting valve 55 and the nitrogen gas pipe 133.

  By the way, the functions of the gas separation hollow fiber membrane 50, the flow rate adjusting valve 55, and the carbon dioxide absorption tank 70 are the same as those shown in the first embodiment, and will not be described.

  In the second embodiment, as shown in FIG. 4, an emergency such as a fire or lack of oxygen occurred while using the oxygen gas supply device of the present invention. In this case, the compressed air storage tank 20, the compressed air pipe 126, the pressure reducing valve 21, the compressed air pipe 127, the on-off valve 31, the compressed air pipe 128, and the air filter 30 constituting the integrated part 102 are included. , Compressed air piping 129, gas separation hollow fiber membrane 50, pressure gauge 22, oxygen-enriched gas piping 141, carbon dioxide gas absorption tank 70, oxygen-enriched gas piping 146, on-off valve 83, oxygen Enriched gas pipe 145, oximeter pipe 151, on-off valve 71, oximeter pipe 152, oximeter 72, pressure gauge 82, nitrogen gas pipe 131, on-off valve 54, nitrogen gas Piping 132, flow control valve 55, and nitrogen gas It has become to be able to move from the left that place carrying a tube 133 on the back.

  This will be explained with reference to FIG. 5. Although only a part of the whole is specifically shown as the integral part 102, the compressed air storage tank 20 and the gas separation hollow fiber membrane 50 are shown. The oxygen-enriched gas 113 shown in FIG. 9 is sent to the mask 202. Further, the entire integrated portion 102 can be attached to the body of one worker by the mounting tool 204, and the oxygen-enriched gas 113 can be sucked while working.

  Regarding the nitrogen gas using means 210, the work clothes 210 shown in the first embodiment can be applied to the second embodiment, and contents other than the work clothes 210 can also be applied to the second embodiment. It is.

  The method and apparatus for supplying oxygen gas according to the present invention is configured as described above, and the operation thereof will be described below.

  In this case, when the first embodiment is compared with the second embodiment, the compressed air storage tank 20 is used with respect to the air compressor 10, and the compressed air storage tank 20 can move on the back, so that it is rich in oxygen. The gasification gas storage tank 80 is not required. Therefore, the basic function of supplying compressed air, separating the nitrogen gas and the oxygen-enriched gas by the gas separation hollow fiber membrane 50, and removing the carbon dioxide gas by the carbon dioxide absorption tank 70, and the present invention in an emergency. Since the idea of moving with the apparatus on the back is the same, the details are omitted.

  System diagram when a compressor is used as the compressed air of the present invention   Configuration diagram when a compressor is used as the compressed air of the present invention   Diagram showing cooling of work clothes   System diagram when a compressed air storage tank is used as the compressed air of the present invention   The block diagram at the time of using a compressed-air storage tank as compressed air of this invention

Explanation of symbols

10. Air compressor 20 ... Compressed air storage tank 21 ... Pressure reducing valve 22 ... Pressure gauge 30 ... Air filter 31 ... Open / close valve 32 ... Joint 50 ... Gas separation hollow fiber membrane 51 ... Joint 52 ... · Pressure reducing valve 53 ········ Pressure gauge 54 ······· Open / close valve 54 ············································· means)
71 .. On-off valve 72 ... Oxygen concentration meter 80 ... Oxygen-enriched gas storage tank 81 ... Pressure reducing valve 82 ... ... Pressure gauge 83 .... On-off valve 101 ... Integrated part 102 ... Integrated part 111 ... Air 112 ... Nitrogen gas 113... Oxygen-enriched gas 121... Compressed air pipe 122... Compressed air pipe 123... Compressed air pipe 124. Piping 125... Compressed air piping 126... Compressed air piping 127... Compressed air piping 128. Piping 131 ··· Nitrogen gas piping 132 ··· Nitrogen gas piping 133 ··· Nitrogen gas piping 141 ··· Oxygen-enriched gas pipe 142... Oxygen-enriched gas pipe 143... Oxygen-enriched gas pipe 144... Oxygen-enriched gas pipe 145. Gas pipe 146... Oxygen enriched gas pipe 151... Oxygen meter pipe 152... Oxygen meter pipe 201. ... Mask 203 ··· Wearing device 204 ··· Wearing device 210 ··· Work clothes (nitrogen gas using means)
211 ··· Upper 212 ·····························································································・ ・ ・ ・ ・ ・ Belt 217 ・ ・ ・ ・ ・ ・ Inlet hole 218 ・ ・ ・ ・ ・ ・ Exhaust hole

Claims (12)

  In the method of supplying oxygen gas, it is possible to separate a wet oxygen-enriched gas having a high concentration by introducing compressed air into the gas separation hollow fiber membrane (50). A method for supplying oxygen gas, characterized in that at least the gas separation hollow fiber membrane (50) is supported on the back for the purpose of minimizing pressure loss after separating the gas.   The method of supplying oxygen gas according to claim 1, wherein the compressed air is obtained by connecting to an air compressor (10).   The compressed air is obtained by connecting to a compressed air storage tank (20), and the compressed air storage tank (20) is also supported by the gas separation hollow fiber membrane (50). Item 2. The method for supplying oxygen gas according to Item 1.   The method for supplying oxygen gas according to any one of claims 1 to 3, wherein carbon dioxide gas in the oxygen-enriched gas is removed by a carbon dioxide gas absorbing means (70).   The remaining nitrogen gas (112) separated from the oxygen-enriched gas by the gas separation hollow fiber membrane (50) is used by the nitrogen gas using means (210). 5. The method for supplying oxygen gas according to any one of 4 above.   6. The supply of oxygen gas according to claim 5, wherein the nitrogen gas using means (210) feeds the remaining nitrogen gas (112) into the work garment (210) for the purpose of cooling. Method.   In an oxygen gas supply device, a gas separation hollow fiber membrane (50) that separates a wet oxygen-enriched gas having a high concentration by introducing compressed air, and carbon dioxide contained in the oxygen-enriched gas. An apparatus for supplying oxygen gas, characterized in that a carbon dioxide absorption tank (70) to be removed is provided.   The oxygen gas supply device according to claim 7, wherein the compressed air is obtained by being connected to a compressor (10) or a compressed air storage tank (20).   The oxygen gas supply device according to claim 7 or 8, wherein the carbon dioxide absorption tank (70) is filled with lime water or zeolite.   The gas separation hollow fiber membrane (50) and the oxygen-enriched gas storage tank (80) for storing the oxygen-enriched gas, and the compressed air storage tank (20) for storing the gas separation hollow fiber membrane (50) and compressed air. ) Constitutes the integral part (101, 102), and the integral part (101, 102) is attached to the mounting tool (203, 102) for the purpose of minimizing pressure loss after separating the oxygen-enriched gas. The apparatus for supplying oxygen gas according to claim 8 or 9, wherein the apparatus can be moved by carrying it back together as one unit.   The remaining nitrogen gas (112) obtained by separating the oxygen-enriched gas from the gas separation hollow fiber membrane (50) constitutes an upper garment (211), a scab (212), and a belt (216) for cooling purposes. Inflow hole (217) which is sent to work garment (210) which shuts in and out of gas at an ankle and a neck part, and where said nitrogen gas (112) is located in a neck part of said upper garment (211) To the inner side of the upper garment (211), the nitrogen gas (112) inside the upper garment (211) is placed on the upper part of the belt (216) of the upper garment (211). 214) through the nitrogen gas flow pipe (213) to the inside of the scab (212) from the stub side joint (215) located in the lower part of the belt (216) of the stub (212). And send it to the above ( 11. The structure according to claim 7, wherein the nitrogen gas (112) inside 12) can be discharged from a discharge hole (218) located at a knee portion of both feet. An oxygen gas supply device according to claim 1.   The air filter (30) is disposed upstream of the gas separation hollow fiber membrane (50), and the flow rate adjusting valve (55) is disposed downstream of the gas separation hollow fiber membrane (50). An oxygen gas supply device according to claim 1.

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