JP6008482B2 - Gas generator - Google Patents

Description

  The present invention relates to a gas-liquid separator and a gas generator, and more particularly to a gas-liquid separator and a gas generator for efficiently separating each fluid from a multiphase flow of gas and liquid.

  A gas-liquid separator is a device for efficiently separating each fluid (gas, liquid) from a multiphase flow of gas and liquid, and as an example, is used as a device constituting a gas generation device. . For example, as illustrated in FIG. 1, the gas generator electrolyzes a liquid to be decomposed such as pure water or an alkaline aqueous solution to produce hydrogen gas and oxygen gas, and the produced hydrogen gas and oxygen gas are mixed into a gas-liquid mixed phase. An apparatus 1 for obtaining separately from a fluid. The gas generator 1 includes at least a water electrolysis cell 107 that electrolyzes a liquid to be decomposed to generate gas, and a gas-liquid separator 10 that separates the generated gas from a gas-liquid mixed phase fluid.

  The gas generator 1 in FIG. 1 is a circulating gas generator provided with a gas-liquid separator 10, and the gas-liquid separator 10 converts hydrogen gas generated on the negative electrode side of the water electrolysis cell 107 into a gas-liquid mixed phase fluid. And a hydrogen gas separator 3 for separating the oxygen gas generated from the positive electrode side of the water electrolysis cell 107 and an oxygen gas separator 5 for separating the gas gas from the gas-liquid mixed phase fluid. The hydrogen gas separator 3 includes a hydrogen gas mixed phase fluid introduction line 7 for introducing the hydrogen gas-containing liquid generated in the water electrolysis cell 107, and a hydrogen gas discharge line 9 for discharging the hydrogen gas separated by the hydrogen gas separator 3. The liquid discharge line 11 for discharging the liquid after the separation process is connected. On the other hand, the oxygen gas separator 5 also includes an oxygen gas mixed phase fluid introduction line 13 for introducing the oxygen gas-containing liquid generated in the water electrolysis cell 107 and an oxygen gas discharge line for discharging the oxygen gas separated by the oxygen gas separator 5. 15 is connected to a liquid discharge line 17 for discharging the liquid after the separation process. The liquid discharge line 11 connected to the hydrogen gas separator 3 and the liquid discharge line 17 connected to the oxygen gas separator 5 are connected to the collecting pipe 109, and the liquid discharged from the two systems is discharged from the collecting pipe 109. Mix.

  In such a gas generator 1, the liquid discharged from each of the hydrogen gas separator 3 and the oxygen gas separator 5 is mixed in the collecting pipe 109. Therefore, when hydrogen gas or oxygen gas is contained in the liquid without being sufficiently separated, the hydrogen gas and oxygen gas contained in the liquid are mixed in the collecting pipe 109 to form a mixed gas. 1 may be a safety problem. Further, when a liquid containing oxygen gas circulates and flows into the water electrolysis cell 107 again, the oxygen gas is mixed into the liquid introduction line 7 connected to the hydrogen gas separator 3. Therefore, the purity of the hydrogen gas separated by the hydrogen gas separator 3 may be reduced.

  For such problems, Patent Document 1 proposes a cylindrical vertical gas-liquid separator that separates a gas-liquid two-phase fluid into a gas and a liquid. This technology includes a cylindrical vertical tank having a liquid discharge pipe at the bottom and a gas discharge pipe at the top, an upper nozzle that is provided at the upper part of the cylindrical wall of the tank and discharges fluid in the direction of the cylinder's inner circumference, and the cylindrical wall of the tank A lower nozzle that is provided in the lower portion and discharges liquid in the direction opposite to the upper nozzle in the tangential direction of the inner circumference of the cylinder. According to this technique, by providing the lower nozzle, the swirl flow in the liquid phase generated by the upper nozzle can be canceled, and the swirl flow in the liquid phase can be almost eliminated. The gas phase is prevented from being mixed into the phase, and high gas-liquid separation efficiency can be realized.

Japanese Patent Laid-Open No. 10-57710

  The present invention has been made to solve the conventional problems, and an object of the present invention is to provide a gas-liquid separator that can efficiently separate a gas from a mixed phase flow of the gas and the liquid. Another object of the present invention is to provide a gas generating device including such a gas-liquid separator.

  A gas-liquid separator according to the present invention for solving the above-described problems has an external tank and an internal tank provided in the external tank, and the external tank has a gas discharge port provided in an upper portion thereof. A liquid discharge port provided in a lower portion, and the internal tank has a detour means for detouring the gas-liquid mixed phase fluid flowing in from the introduction tube through which an introduction tube for introducing the gas-liquid mixed phase fluid is drawn, and And an opening that allows the gas-liquid mixed-phase fluid after overflowing to overflow from above and flow down into the external tank.

  According to this invention, the internal tank has the bypass means for drawing in the introduction pipe for introducing the gas-liquid mixed phase fluid and bypassing the gas-liquid mixed phase fluid flowing in from the introduction pipe. It does not overflow from the upper opening and flow down into the external tank. As a result, since the overflow of the gas-liquid mixed phase fluid from the opening is stabilized, the gas is easily separated from the gas-liquid mixed phase fluid when the overflow occurs, and the gas-liquid separation is effectively performed.

  In the gas-liquid separator according to the present invention, the bypass means is configured such that the leading end of the introduction pipe drawn into the internal tank is arranged vertically downward.

  According to the present invention, since the tip of the introduction pipe drawn into the internal tank is arranged vertically downward as the bypass means, the gas-liquid mixed phase fluid flowing from the tip of the introduction pipe arranged vertically downward is After hitting the bottom of the internal tank, it goes upward and overflows from the upper opening. As a result, since the overflow of the gas-liquid mixed phase fluid from the opening is stabilized, the gas is easily separated from the gas-liquid mixed phase fluid when the overflow occurs, and the gas-liquid separation is effectively performed.

  In the gas-liquid separator according to the present invention, the internal tank is configured such that an outer wall surface of the internal tank continuous from the opening is an inclined surface.

  According to this invention, since the outer wall surface of the internal tank continuing from the opening is configured to be an inclined surface, the opening is smaller than the horizontal cross-sectional area (for example, the fuselage cross-sectional area) of the internal tank. The inclined surface is configured to spread from the opening. Therefore, the gas-liquid mixed phase fluid overflowing from the internal tank is thin and stable while flowing on the inclined surface that spreads for a certain period of time, so that the gas contained in the gas-liquid mixed phase fluid is easily separated. As a result, the gas is easily separated from the gas-liquid mixed phase fluid when it overflows, and the gas-liquid separation is effectively performed.

  In the gas-liquid separator according to the present invention, the bypass means is configured such that the leading end of the introduction pipe drawn into the internal tank is arranged vertically upward, and an interference plate is provided above the leading end. To do.

  According to the present invention, as the bypass means, the leading end of the introducing pipe drawn into the internal tank is arranged vertically upward, and the interference plate is provided above the leading end. The gas-liquid mixed phase fluid that has flowed in from the front end flows upward so as to avoid the interference plate after hitting the upper interference plate, and overflows from the upper opening. As a result, since the overflow of the gas-liquid mixed phase fluid from the opening is stabilized, the gas is easily separated from the gas-liquid mixed phase fluid when the overflow occurs, and the gas-liquid separation is effectively performed.

  In order to solve the above problems, a gas generator according to the present invention electrolyzes a liquid to be decomposed to produce hydrogen gas and oxygen gas, and separates the produced hydrogen gas and oxygen gas from a gas-liquid mixed phase fluid. An apparatus for obtaining a water electrolysis cell that electrolyzes the liquid to be decomposed to generate gas, and a gas-liquid separator that separates the generated gas from the gas-liquid mixed phase fluid, The gas-liquid separator has an external tank and an internal tank provided in the external tank, and the external tank has a gas discharge port provided in the upper portion and a liquid discharge port provided in the lower portion. The internal tank has an inlet pipe for introducing a gas-liquid mixed phase fluid drawn therein, and bypass means for bypassing the gas-liquid mixed phase fluid flowing from the introducing pipe; Overflow from the inside of the external tank And having an opening for flow.

  According to the present invention, the internal tank provided in the gas-liquid separator has the detour means for detouring the gas-liquid mixed phase fluid flowing in from the introducing tube into which the introducing tube for introducing the gas-liquid mixed phase fluid is drawn, and thus flows in The gas-liquid mixed phase fluid does not overflow from the upper opening as it is, and does not flow down into the external tank. As a result, since the overflow of the gas-liquid mixed phase fluid from the opening is stabilized, the gas is easily separated from the gas-liquid mixed phase fluid when the overflow occurs, and the gas-liquid separation is effectively performed. Since the gas generator equipped with such a gas-liquid separator can reduce the gas contained in the liquid discharged from the liquid discharge port of the gas-liquid separator, the problem of contamination of other gases that occurs when the liquid recirculates. This can eliminate the decrease in purity of the gas to be obtained. Moreover, since the contained gas in the liquid discharged | emitted from the liquid discharge port of a gas-liquid separator can be reduced, the amount of mixed gas of hydrogen gas and oxygen gas can be suppressed, for example, and safety can be improved.

  According to the gas-liquid separator according to the present invention, the gas-liquid mixed phase fluid that flows in does not overflow from the upper opening as it is, and does not flow into the external tank. Overflow stabilizes. As a result, the gas is easily separated from the gas-liquid mixed phase fluid when it overflows, and the gas-liquid separation is effectively performed.

  According to the gas generator of the present invention, the gas contained in the liquid discharged from the liquid discharge port of the gas-liquid separator can be reduced, so that the problem of mixing other gases that occurs when the liquid recirculates is eliminated. It is possible to suppress a decrease in the purity of the gas to be obtained. Moreover, since the contained gas in the liquid discharged | emitted from the liquid discharge port of a gas-liquid separator can be reduced, the amount of mixed gas of hydrogen gas and oxygen gas can be suppressed, for example, and safety can be improved.

It is a figure which shows an example of a structure of a gas generator. It is a section lineblock diagram showing an example of a gas liquid separator concerning the present invention. It is a section lineblock diagram showing other examples of a gas liquid separator concerning the present invention. It is a section lineblock diagram showing an example of an opening of an internal tank of a gas liquid separator concerning the present invention. (A) is a perspective view showing an example of the opening of the internal tank of the gas-liquid separator according to the present invention, (B) is a perspective view showing an example of the opening of the internal tank of the gas-liquid separator, (C) is a perspective view which shows another example of the opening part of the internal tank of a gas-liquid separator. It is a cross-sectional block diagram which shows another example of the gas-liquid separator which concerns on this invention. It is a section lineblock diagram showing an example of a comparison form of a gas liquid separator.

  Hereinafter, a gas-liquid separator and a gas generator according to the present invention will be described with reference to the drawings. The technical scope of the present invention is not limited to the following description and drawings.

[Gas-liquid separator]
The gas-liquid separator 20 (20A, 20B, 20C) according to the present invention efficiently separates each fluid (gas, liquid) from a mixed phase flow of gas and liquid (also referred to as “gas-liquid mixed phase fluid”). For example, as shown in FIG. 2, the apparatus includes an external tank 27 and an internal tank 28 provided in the external tank 27. And the external tank 27 has the gas discharge port 26 provided in the upper part, and the liquid discharge port 25 provided in the lower part. In the internal tank 28, the introduction pipe 21 for introducing the gas-liquid mixed phase fluid 23 is drawn, and the bypass means for bypassing the gas-liquid mixed phase fluid 23 flowing from the introduction pipe 21 and the bypassed gas-liquid mixed phase fluid 23 are provided. It is characterized by having an opening 30 that overflows from the top and flows down into the external tank 27.

  In such a gas-liquid separator 20, for example, as shown in FIG. 2, an introduction pipe 21 that introduces a gas-liquid mixed phase fluid 23 is drawn into an internal tank 28, and the gas-liquid mixed phase fluid 23 that flows in from the introduction pipe 21 is bypassed. Since the bypass means is provided, the inflowing gas-liquid mixed phase fluid 23 does not overflow from the upper opening 30 as it is, and does not flow down into the external tank 27. As a result, since the overflow of the gas-liquid mixed phase fluid 23 from the opening 30 is stabilized, the gas is easily separated from the gas-liquid mixed phase fluid 23 when overflowing, and the gas-liquid separation is effectively performed. A solid arrow in FIG. 2 (the same applies to other drawings) indicates the flow of the gas-liquid mixed phase fluid 23.

  The gas-liquid separator according to the present invention can be divided into first to third embodiments shown in FIGS. This will be described in detail below.

(Gas-liquid separator of the first embodiment)
As shown in FIG. 2, the gas-liquid separator 20 </ b> A of the first embodiment is an apparatus for separating a gas from a gas-liquid mixed phase fluid 23 of a gas and a liquid. As described above, the gas-liquid separator 20A includes an external tank 27 and an internal tank 28 provided in the external tank 27. The external tank 27 has a gas discharge port 26 provided in the upper portion and a liquid discharge port 25 provided in the lower portion. In the internal tank 28, the introduction pipe 21 for introducing the gas-liquid mixed phase fluid 23 is drawn, and the bypass means for bypassing the gas-liquid mixed phase fluid 23 flowing from the introduction pipe 21 and the bypassed gas-liquid mixed phase fluid 23 are provided. And an opening 30 that overflows from the top and flows down into the external tank 27.

  The external tank 27 has an internal tank 28 therein, and is a hermetically sealed container with a gas discharge port 26 provided in the upper portion and a liquid discharge port 25 provided in the lower portion. An inlet pipe 21 for supplying the gas-liquid mixed phase fluid 23 to the internal tank 28 passes through the side wall of the external tank 27. Although the internal tank 28 will be described later, it is disposed in the center so as not to contact the side wall and the upper and lower walls of the external tank 27. Specifically, it is supported by a support member (not shown) welded to the side wall. Although the shape of an external tank is not specifically limited, For example, the internal diameter in the case of a cylindrical shape is 0.1 m-2 m, for example.

  The gas discharge port 26 is provided in the upper part of the external tank 27 and discharges the gas separated from the gas-liquid mixed phase fluid 23 to the outside. The attachment position of the gas discharge port 26 may be the top of the external tank 27 as shown in FIG. 2, or may be the upper part of the side wall (not shown). Although the magnitude | size of the gas exhaust port 26 is not specifically limited, The internal diameter in the case of a cylindrical shape is 10 mm-200 mm, for example.

  The liquid discharge port 25 is provided in the lower part of the external tank 27 and is for discharging the liquid after the gas is separated from the gas-liquid mixed phase fluid 23. The attachment position of the liquid discharge port 25 may be the bottom of the external tank 27 as shown in FIG. 2 or may be the lower part of the side wall (not shown). Although the magnitude | size of the liquid discharge port 25 is not specifically limited, The internal diameter in the case of a cylindrical shape is 10 mm-200 mm, for example.

  The internal tank 28 is provided in the external tank 27 and is a substantially hermetically sealed container for temporarily storing the gas-liquid mixed phase fluid 23 flowing from the introduction port 22. In the upper part of the internal tank 28, an opening 30 through which the gas-liquid mixed phase fluid 23 overflows is provided. The shape of the bottom 29 may be a flat surface as shown in FIG. 2 or a curved surface (not shown). An introduction pipe 21 for supplying the gas-liquid mixed phase fluid 23 passes through the side wall of the internal tank 28. The internal tank 28 is disposed at the center of the external tank 27 so as not to contact the side walls and the upper and lower walls of the external tank 27. Specifically, it is supported by a support member (not shown) welded to the side wall or bottom of the external tank 27. Although the shape of the internal tank 28 is not specifically limited, For example, the internal diameter in the case of a cylindrical shape is 0.05 m-1.5 m, for example.

  The introduction pipe 21 is a pipe through which the gas-liquid mixed phase fluid 23 flows into the internal tank 28 through the external tank 27 and further through the internal tank 28. The introduction pipe 21 is welded and fixed to the external tank 27 and the internal tank 28. Although the penetration position of the introduction pipe 21 is not particularly limited, it is provided on the bottom side of the internal tank 28 in the example of FIG. Although the internal diameter in case the introduction pipe 21 is cylindrical is not specifically limited, For example, it is about 10 mm-200 mm.

  The introduction port 22 is an inflow port for the gas-liquid mixed phase fluid 23 at the tip of the introduction tube 21, and is provided vertically downward in this embodiment. Examples of means for vertically lowering the introduction port 22 include means for connecting an elbow to the tip of the introduction pipe 21 and bending the introduction pipe 21 downward. The introduction port 22 is usually provided with the same inner diameter as the inner diameter of the introduction tube 21.

  The gas-liquid mixed phase fluid 23 that has flowed into the internal tank 28 from the introduction port 22 collides with the bottom 29 of the internal tank 28, then moves toward the upper opening 30 and overflows from the opening 30. When the gas-liquid mixed phase fluid 23 overflows, the gas contained in the gas-liquid mixed phase fluid 23 is easily separated, and the gas is efficiently separated from the gas-liquid mixed phase fluid 23. When the gas-liquid mixed phase fluid 23 overflows, the separation of the gas at the overflow time is such that the thickness of the gas-liquid mixed phase fluid 23 is temporarily reduced at the edge of the opening 30. This is thought to be because the gas contained therein easily escapes from the liquid.

  The size of the opening 30 is not particularly limited, but is preferably large within the range in which it can be formed. When the opening 30 is large, the length of the edge of the opening 30 becomes long, and the thickness of the gas-liquid mixed phase fluid 23 that overflows from the edge of the opening 30 becomes thinner. When the internal tank 28 is cylindrical, the maximum diameter of the opening 30 is the same as the diameter of the internal tank 28.

  The detour means in the gas-liquid separator 20A of the first embodiment is that the introduction port 22 at the tip of the introduction pipe 21 is arranged vertically downward in the internal tank 28 as described above. By such detour means, the gas-liquid mixed phase fluid 23 that has flowed in from the inlet 22 is prevented from flowing upward and overflowing directly toward the opening 30 of the internal tank 28. When the gas-liquid mixed phase fluid 23 with suppressed momentum overflows, the liquid level fluctuation of the gas-liquid mixed phase fluid 23 at the opening 30 becomes small and stable, and the stable gas-liquid mixed phase fluid 23 overflows. By doing so, gas-liquid separation at the time of overflow can be performed effectively.

  As described above, according to the gas-liquid separator 20A of the first embodiment, the introduction port 22 at the distal end of the introduction pipe 21 drawn into the internal tank 28 is arranged vertically downward as a bypass means. The gas-liquid mixed phase fluid 23 that has flowed in from the arranged inlet 22 moves upward after hitting the bottom 29 of the internal tank 28 and overflows from the upper opening 30. As a result, since the overflow of the gas-liquid mixed phase fluid 23 from the opening 30 is stabilized, the gas is easily separated from the gas-liquid mixed phase fluid 23 when overflowing, and the gas-liquid separation is effectively performed. Thus, in this gas-liquid separator 20A, the inflowing gas-liquid mixed phase fluid 23 does not overflow vigorously from the upper opening 30 and flows down into the external tank 27 by the bypass means.

(Gas-liquid separator of the second embodiment)
As shown in FIGS. 3 to 5, the gas-liquid separator 20 </ b> B of the second embodiment has the same basic apparatus configuration as that of the first embodiment, but differs in detour means provided in the internal tank 28. Since the other configuration is the same as that of the gas-liquid separator 20A of the first embodiment, the same reference numerals are used in FIG. 3, and the description thereof is omitted below.

  As shown in FIG. 3, the detour means in the second embodiment includes a vertically downward introduction port 22 similar to that of the first embodiment, and the outer wall surface of the internal tank 28 continuing from the opening 30 is inclined. It is comprised so that it may be 31. As shown in FIG. 4, the gas-liquid mixed phase fluid 23 overflowing from the internal tank 28 becomes thin and stable while flowing on the inclined surface 31 for a certain time, so that the gas contained in the gas-liquid mixed phase fluid 23 Becomes easy to separate. As a result, the gas is easily separated from the gas-liquid mixed phase fluid 23 when it overflows, and the gas-liquid separation is effectively performed.

  As shown in FIG. 5A, such an inclined surface is a curved inclined surface 31 in which the upper part of the outer wall surface of the inner tank is radially widened like the conical surface when the inner tank 28 is cylindrical. Composed. Further, as shown in FIGS. 5B and 5C, when the inner tank 28 is rectangular, the upper portion of the outer wall surface of the inner tank is configured to be planar inclined surfaces 31 ′ and 31 ″. Also in this case, the gas-liquid mixed phase fluid 23 overflowing from the openings 30, 30 ′, 30 ″ flows on the inclined surfaces 31, 31 ′, 31 ″ and flows down into the external tank. Regardless of the shape, it may be a curved surface as shown in Fig. 5 (A) or a flat shape as shown in Fig. 5 (B) (C). Since ', 30 "is smaller than the horizontal sectional area of the internal tank 28, such inclined surfaces 31, 31', 31" can be easily formed in the upper part of the internal tank.

  The inclination angle and length of the inclined surface 31 can be arbitrarily designed according to the horizontal sectional area of the internal tank 28 and the opening area of the opening. For example, when the inclined surface 31 is lengthened, the difference between the horizontal sectional area of the internal tank 28 and the opening area of the opening may be increased, or the inclination angle θ of the inclined surface 31 may be increased. The inclination angle θ is defined as an angle with respect to a horizontal plane, that is, a stationary gas-liquid mixed phase fluid surface.

  As the length L of the inclined surface 31 is longer, the time during which the gas-liquid mixed phase fluid 23 flows on the inclined surface 31 becomes longer, the opportunity for gas-liquid separation increases, and more effective gas-liquid separation is performed. The length L of the inclined surface 31 can be arbitrarily adjusted by the inclination angle θ of the inclined surface 31. The inclination angle θ of the inclined surface 31 is arbitrarily designed in consideration of the size of the internal tank 28, the flow rate of the gas-liquid mixed phase fluid 23, the time for flowing the inclined surface 31, the gas-liquid separation ability, etc. Confirmed that effective gas-liquid separation could be performed in the case of 20 ° to 80 °. When the inclination angle θ of the inclined surface 31 is reduced, the speed of the gas-liquid mixed phase fluid 23 can be reduced. Therefore, the gas contained in the gas-liquid mixed phase fluid 23 is easily separated while the gas-liquid mixed phase fluid 23 flows through the inclined surface 31.

  The inclined surface 31 may be a smooth surface, a wave surface, or provided with slits and irregularities. By providing slits and irregularities on the inclined surface 31, it is possible to provide a portion that stabilizes the flow of the gas-liquid mixed phase fluid 23 on the inclined surface 31 and makes the liquid thickness thinner.

  As described above, according to the gas-liquid separator 20 </ b> B of the second embodiment, the vertical downward introduction port 22 is provided as a bypass, and the outer wall surface of the internal tank 28 continuing from the opening 30 is the inclined surface 31. Since the opening 30 is configured, the opening 30 is smaller than the horizontal sectional area (for example, the trunk sectional area) of the internal tank 28, and the inclined surface 31 is configured to be continuous from the opening 30. Therefore, the gas-liquid mixed phase fluid 23 overflowing from the internal tank 28 is thin and stable while flowing on the inclined surface 31 for a certain period of time, so that the gas contained in the gas-liquid mixed phase fluid is easily separated. As a result, the gas is easily separated from the gas-liquid mixed phase fluid when it overflows, and the gas-liquid separation is effectively performed.

(Gas-liquid separator of the third embodiment)
As shown in FIG. 6, the gas-liquid separator 20 </ b> C of the third embodiment has the same basic apparatus configuration as that of the first embodiment, but differs in detour means provided in the internal tank 28. Since the other configuration is the same as the gas-liquid separator 20A of the first embodiment, the same reference numerals are used in FIG. 6 and the description thereof is omitted below.

  Unlike the first embodiment, the third embodiment includes a vertically upward introduction port 22. As shown in FIG. 6, the introduction port 22 is provided at the bottom 29 of the internal tank 28 and is provided so as to flow into the internal tank 28 from below, but as in the case of the first embodiment, The inlet pipe 21 may penetrate the side wall 28, and the inlet 22 at the leading end of the inlet pipe may be provided vertically upward (not shown).

  In the third embodiment, an interference plate 40 provided above the vertically upward introduction port 22 is used as a bypass means. The interference plate 40 is provided directly above the vertically upward introduction port 22 and acts to prevent the flow of the gas-liquid mixed phase fluid 23 that vigorously moves upward from the introduction port 22. As a result, the gas-liquid mixed phase fluid 23 whose flow is blocked flows in the direction toward the edge of the interference plate 40 and moves upward. The gas-liquid mixed phase fluid 23 directed upward is stabilized by suppressing the momentum of the flow, and the liquid level mixed phase 23 of the gas-liquid mixed phase fluid 23 at the time of overflow becomes small and stable. By overflowing, gas-liquid separation at the time of overflow can be performed effectively.

  The interference plate 40 is not particularly limited as long as it suppresses the momentum of the flow of the gas-liquid mixed phase fluid 2 toward the upper side and stabilizes the flow. For example, a flat plate, a corrugated flat plate, a perforated flat plate (punching metal) ), A flat plate provided with a rectangular slit, and the like. The size may be smaller than the inner dimension of the inner tank 28 (inner diameter in the case of a cylindrical shape) and does not excessively hinder the flow. The material is not particularly limited as long as the material is resistant to the gas-liquid mixed phase fluid 23.

  As described above, according to the gas-liquid separator 20C of the third embodiment, the introduction port 22 at the tip of the introduction pipe 21 drawn into the internal tank 28 is arranged vertically upward as a bypass means, and interferes above the introduction port 22. Since the plate 40 is provided, the gas-liquid mixed phase fluid 23 flowing in from the inlet port 22 arranged vertically upward hits the interference plate 40 provided above the inlet port and then detours upward. Overflow from the opening 30. As a result, since the overflow of the gas-liquid mixed phase fluid 23 from the opening 30 is stabilized, the gas is easily separated from the gas-liquid mixed phase fluid 23 when overflowing, and the gas-liquid separation is effectively performed. Thus, in this gas-liquid separator 20C, the inflowing gas-liquid mixed phase fluid 23 does not overflow from the upper opening 30 vigorously as it flows into the external tank 27 by the bypass means.

(Comparative gas-liquid separator)
FIG. 7 is a cross-sectional view showing an example of a gas-liquid separator 20D of a comparative form for comparison with the gas-liquid separators 20A, 20B, 20C according to the present invention. The gas-liquid separator 20D is not provided with the internal tank 28 provided in the gas-liquid separators 20A, 20B, 20C of the first to third embodiments. Therefore, the introduction pipe 21 that introduces the gas-liquid mixed phase fluid 23 is drawn into the tank 27, and the gas-liquid mixed phase fluid 23 that has flowed in from the introduction pipe 21 is separated into gas and liquid during the convection in the tank 27 and separated. The discharged gas is discharged from a gas exhaust port 26 provided in the upper part of the tank, and the processed liquid is discharged from a liquid discharge port 25 provided in the lower part of the tank.

  The gas-liquid separator 20D of the comparative form is not provided with the internal tank 28 provided in the gas-liquid separators 20A, 20B, 20C of the first to third embodiments, and there is also a bypass means in the internal tank 28. Therefore, there is no effect that gas can be effectively separated from the gas-liquid mixed phase fluid when the gas-liquid mixed phase fluid overflows. Therefore, compared with the gas-liquid separators 20A, 20B, and 20C according to the present invention, the gas-liquid separation capability is insufficient.

(Application example)
The gas-liquid separator according to the present invention described above can be widely applied to applications that need to separate a gas and a liquid from a mixed phase flow of various gases and liquids. For example, as described later, the gas is generated from a gas-liquid mixed phase fluid containing hydrogen gas and / or oxygen gas as part of a gas generator that generates hydrogen gas and oxygen gas from an electrolyzed liquid such as water or an alkaline aqueous solution. You may use as an apparatus for isolate | separating. Moreover, you may use as a gas-liquid separator for isolate | separating chlorine gas from the gas-liquid mixed phase fluid containing chlorine gas obtained by salt electrolysis.

  In addition to these, it can be used to solve defects (yield reduction, cost increase, trouble, quality instability, performance deterioration, environmental problems) caused by bubbles contained in the liquid. For example, in the semiconductor field, it can be used to separate gases contained in developers, rinse solutions, photoresist solutions, cleaning solutions, etching solutions, resist removal solutions, various chemicals, etc., and the generation of microbubbles (fine bubbles) is cleaned. It can prevent the effect from being hindered. In the display (FPD) field, it can be used to separate gases contained in photoresist, developer, rinse solution, etching solution, removal solution, cleaning solution, resist stripping solution, etc. Solvable. Further, in the battery field, it can be used for separation of gas contained in the electrolyte solution of various batteries, and the problems of bubbles in the electrolyte solution and dissolved gases and bubbles in the chemical solution used can be solved.

  In the printing field, it can be used to separate the gas contained in the ink, and it eliminates dissolved gas in the ink that hinders the control of the ink concentration and liquid volume, thereby suppressing the generation of bubbles, and printing defects due to bubbles. It is possible to solve this problem and enable stable printing, or to solve problems such as bad air bubbles and poor quality. In the fluid control field, it can be used for separation of gases contained in fluids such as precision liquid feeding, micro liquid feeding, and precision flow rate measurement, and dissolved gas contained in fluids affects the measurement object such as oxidation. It is possible to solve such a problem that a correct measurement result cannot be obtained by giving, or a problem that a stable result cannot be obtained due to the influence of bubbles in the detection unit. In the chemical solution application field, it can be used to separate gases contained in substrate processing solutions, coating solutions, coating solutions, drum coating solutions, and various coating solutions. In the chemical industry, it can be used for synthesis reaction solutions, polymerization solutions, and solvents. It can be used for separating contained gases, and in the field of other organic EL and liquid crystal color filters, it can be used for separating gases contained in chemicals, solvents and the like.

[Gas generator]
As shown in FIG. 1, the gas generator 1 according to the present invention produces hydrogen gas and oxygen gas by electrolyzing a liquid that is a liquid to be decomposed such as water or an alkaline aqueous solution, and the produced hydrogen gas and oxygen. A circulation type gas generator for separating gas from a gas-liquid mixed phase fluid. The gas generator 1 includes a water electrolysis cell 107 that electrolyzes a liquid to be decomposed to generate hydrogen gas and oxygen gas, and a gas-liquid separator 10 that separates the generated hydrogen gas and oxygen gas from a gas-liquid mixed phase fluid. At least.

  The gas-liquid separator 10 includes a hydrogen gas separator 3 for separating hydrogen gas generated on the negative electrode side of the water electrolysis cell 107, and an oxygen gas for separating oxygen gas generated on the positive electrode side of the water electrolysis cell 107. It consists of both the separator 5. These gas-liquid separators 3 and 5 separate the generated hydrogen gas and oxygen gas from the gas-liquid mixed phase fluid.

  The hydrogen gas separator 3 includes a hydrogen gas mixed phase fluid introduction line 7 for introducing the hydrogen gas-containing liquid generated in the water electrolysis cell 107, and a hydrogen gas discharge line 9 for discharging the hydrogen gas separated by the hydrogen gas separator 3. The liquid discharge line 11 for discharging the liquid after the separation process is connected. On the other hand, the oxygen gas separator 5 also includes an oxygen gas mixed phase fluid introduction line 13 for introducing the oxygen gas-containing liquid generated in the water electrolysis cell 107 and an oxygen gas discharge line for discharging the oxygen gas separated by the oxygen gas separator 5. 15 is connected to a liquid discharge line 17 for discharging the liquid after the separation process. The liquid discharge line 11 connected to the hydrogen gas separator 3 and the liquid discharge line 17 connected to the oxygen gas separator 5 are connected to the collecting pipe 109, and the liquid discharged from the two systems is mixed. Then, it returns to the water electrolysis cell 107 through the filter 101, the cooler 103, and the circulation pump 105, and is water electrolyzed again.

  The gas-liquid separator according to the present invention is applied to the gas generator 1 according to the present invention as a hydrogen gas separator 3 and an oxygen gas separator 5, respectively. Since such a gas-liquid separator has been described in the description column of the embodiment shown in FIGS. 2 to 6, detailed description thereof will be omitted here.

  As shown in FIGS. 2 to 6, the basic configuration of the gas-liquid separators 3 and 5 includes an external tank 27 and an internal tank 28 provided in the external tank 27. The external tank 27 has a gas discharge port 26 provided in the upper portion and a liquid discharge port 25 provided in the lower portion. In addition, the internal tank 28 is drawn in the introduction pipe 21 for introducing the gas-liquid mixed phase fluid 23, bypass means for bypassing the gas-liquid mixed phase fluid 23 flowing in from the introduction pipe 21, and the gas-liquid mixed phase fluid after being bypassed. And an opening 30 for overflowing 23 from the upper part and flowing down into the external tank 27.

  In such a gas generator 1, effective gas-liquid separation is performed in each of the gas-liquid separators 3 and 5, so that hydrogen gas and oxygen gas contained in the liquid after the gas-liquid separation process are reduced. Therefore, even when the liquid discharged from each of the hydrogen gas separator 3 and the oxygen gas separator 5 is mixed in the collecting pipe 109, the hydrogen gas and the oxygen gas are hardly mixed to form a mixed gas. The safety of the generator 1 does not become a problem. Further, even if the liquid merged in the collective pipe 109 circulates and flows again into the water electrolysis cell 107, the hydrogen gas and oxygen gas in the liquid are hardly mixed. There is an effect that the gas purity after the gas-liquid separation in the vessel 5 is not lowered.

DESCRIPTION OF SYMBOLS 1 Gas generator 3 Hydrogen gas separator 5 Oxygen gas separator 7 Introducing pipe 9 Hydrogen gas outlet 10 Gas-liquid separator 11 Liquid outlet 13 Introducing pipe 15 Oxygen gas outlet 17 Liquid outlet 20 Gas-liquid separator 21 Introduction Pipe 22 Inlet 23 Gas-liquid mixed phase fluid 25 Liquid outlet 26 Gas outlet 27 External tank 28 Internal tank 29 Bottom of inner tank 30, 30 ', 30 "Opening 31, 31', 31" Inclined surface 32 Gas (gas )
40 Interference plate 101 Filter 103 Cooler 105 Circulating pump 107 Water electrolysis cell 109 Collecting piping d1 Diameter of opening d2 Body diameter of internal tank θ Inclination angle of inclined surface with respect to horizontal plane L Length of inclined surface

Claims (2)

An apparatus for producing hydrogen gas and oxygen gas by electrolyzing a liquid to be decomposed, and separating and obtaining hydrogen gas and oxygen gas from a gas-liquid mixed phase fluid,
A water electrolysis cell that electrolyzes the liquid to be decomposed to generate gas; and a gas-liquid separator that separates the generated gas from the gas-liquid mixed phase fluid;
The gas-liquid separator has an external tank and an internal tank provided in the external tank,
The external tank has a gas outlet provided in the upper part and a liquid outlet provided in the lower part,
The internal tank is drawn in with an introduction pipe for introducing a gas-liquid mixed phase fluid, bypassing the gas-liquid mixed phase fluid flowing from the introduction pipe, and overflowing the gas-liquid mixed phase fluid after the bypass from above. And an opening for flowing down into the external tank,
The detour means arranges the leading end of the introduction pipe drawn into the internal tank vertically downward,
The inner tank, the outer wall surface of the internal tank for continuously from the opening, Ri inclined surfaces der extending end from said opening,
The gas-liquid separator includes a hydrogen gas separator for separating hydrogen gas generated on the negative electrode side of the water electrolysis cell, and an oxygen gas separation for separating oxygen gas generated on the positive electrode side of the water electrolysis cell. It is made up of
The hydrogen gas separator and the oxygen gas separator are connected to a liquid discharge line for discharging the liquid after the separation treatment,
The liquid discharge line connected to the hydrogen gas separator and the liquid discharge line connected to the oxygen gas separator are connected to a collecting pipe,
A liquid generator discharged from two systems is mixed and returned to the water electrolysis cell . An apparatus for producing hydrogen gas and oxygen gas by electrolyzing a liquid to be decomposed, and separating and obtaining hydrogen gas and oxygen gas from a gas-liquid mixed phase fluid,
A water electrolysis cell that electrolyzes the liquid to be decomposed to generate gas; and a gas-liquid separator that separates the generated gas from the gas-liquid mixed phase fluid;
The gas-liquid separator has an external tank and an internal tank provided in the external tank,
The external tank has a gas outlet provided in the upper part and a liquid outlet provided in the lower part,
The internal tank is drawn in with an introduction pipe for introducing a gas-liquid mixed phase fluid, bypassing the gas-liquid mixed phase fluid flowing from the introduction pipe, and overflowing the gas-liquid mixed phase fluid after the bypass from above. And an opening for flowing down into the external tank,
The bypass means is arranged such that the leading end of the introduction pipe drawn into the internal tank is vertically upward, and an interference plate is provided above the leading end .
The gas-liquid separator includes a hydrogen gas separator for separating hydrogen gas generated on the negative electrode side of the water electrolysis cell, and an oxygen gas separation for separating oxygen gas generated on the positive electrode side of the water electrolysis cell. It is made up of
The hydrogen gas separator and the oxygen gas separator are connected to a liquid discharge line for discharging the liquid after the separation treatment,
The liquid discharge line connected to the hydrogen gas separator and the liquid discharge line connected to the oxygen gas separator are connected to a collecting pipe,
A liquid generator discharged from two systems is mixed and returned to the water electrolysis cell .

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