JP4520757B2 - Air diffuser - Google Patents

Description

  The present invention relates to an aeration treatment apparatus used for water treatment and purification of industrial wastewater, water and sewage, lakes, rivers, groundwater, etc., removal and recovery of foreign substances in gas, and bioreactors (bioreactors). Specifically, it is an operation of mixing gas and liquid, stirring them and bringing them into gas-liquid contact. Aeration of air in water to dissolve oxygen in the air, ammonia dissolved in water, trichloroethane, chloride Emission of volatile substances such as methylene, chlorine, trihalomethane, and other substances such as hydrogen chloride, sulfur dioxide, and powder in the reaction are absorbed, removed by collection, recovered, and used for enzyme reactions and microbial reactions. The present invention relates to an air diffuser.

Conventional air diffusion treatment devices are roughly classified into an air diffusion type (bubble type) and a mechanical stirring type (surface stirring). In particular, as shown in FIG. 16, the aeration type aeration processing apparatus 110 has a large number of aeration plates 112, diffusion cylinders, and the like arranged at the bottom of the aeration tank 111, and these are connected via a blower 113 and an air supply line 114. Then, aeration processing is performed by supplying pressurized air. In addition, when a nitrogen compound such as ammonia dissolved in a liquid is diffused to be purified and recovered, a packed tower or a plate tower is often used as shown in FIG. In the case of the dispersal treatment apparatus 115 using a packed tower system, a liquid is supplied from the upper part of the packed tower 116 and a gas is supplied from the lower part of the tower. While the packing 117 arranged in the tower is in gas-liquid contact in countercurrent, volatile substances such as ammonia (NH ₄ ⁺ ) and organic solvent in the liquid are diffused to the gas side to purify and recover the liquid. Processing is in progress.

  Moreover, a cylindrical exhaust gas dispersion pipe having a large number of gas ejection holes is used as a gas-liquid contact reaction device of a processing device for exhaust gas containing powder and sulfurous acid gas. An exhaust gas treatment method using this exhaust gas dispersion pipe is disclosed in Japanese Patent Application Laid-Open No. 7-308536 and Japanese Patent Application Laid-Open No. 9-865, but the gas-liquid contact efficiency between the liquid and the bubbles blown out from many gas injection holes is low. . Moreover, there is a problem of clogging due to adhesion growth of gypsum which is a reaction product.

Furthermore, the conventional air diffuser using a static mixer has low oxygen absorption (dissolution) efficiency due to structural problems, and it is difficult to manufacture an air diffuser with a large diameter (500 mm or more in diameter). Even if it can be manufactured, the gas-liquid contact efficiency is low. Furthermore, the manufacturing cost is also expensive.
Furthermore, the diameter of the air outlet hole of the air supply pipe arranged below the conventional static mixer is in the range of 10 to 40 mm. One or a plurality of blowout holes are provided on the upper surface of the air pipe.
Since the bubble diameter of the bubbles supplied from the blowing hole is the same as the diameter of the air blowing hole, the gas-liquid contact efficiency is low, the oxygen absorption efficiency is also low, and it is necessary to lengthen the contact time in the mixer. .
As a result, the total length of the static mixer, that is, the diffuser is high, and the equipment cost is high.
In addition, plastic, rubber, and the like are often used as constituent materials of the conventional air diffuser including a diffuser plate, a diffuser cylinder, and a static mixer. For this reason, the life of the diffuser is short due to material deterioration, aging, and the like. In addition, when a new one is exchanged, a large amount of waste is generated, and the waste disposal cost becomes expensive.

      Japanese Patent Laid-Open No. 2-198694       JP-A-44-8290       JP-A-53-36182       JP-A-5-168882       Japanese Patent Laid-Open No. 7-284642       JP-A-7-308536       JP-A-9-865       Japanese Patent Laid-Open No. 10-80627       Japanese Patent Laid-Open No. 10-85721       JP 2001-62269 A       JP 59-206096 A       S. J. et al. Chen, et al. "Static Mixing Handbook", Research Institute for Chemical Research, June 1973, P62-82, P199-217       Teruichiro Matsumura, Yasushi Morishima, et al. “Static Mixer: Basics and Applications”, Nikkan Kogyo Shimbun, published September 30, 1981, P1-18, P81-95

  The conventional air diffuser has a low oxygen dissolution and absorption efficiency and requires a large area because the amount of air supplied per air diffuser is small. In addition, for the purpose of mixing and stirring in the aeration tank, air exceeding the required oxygen amount is pressurized and supplied to a diffuser plate or the like. Furthermore, the air resistance passing through the diffuser plate is large. For this reason, a large amount of power is consumed. In addition, conventional diffusion treatment apparatuses such as packed towers and tray towers cause clogging due to the growth of calcium compounds and microorganisms in the liquid on the packings and trays and require regular maintenance management. . Furthermore, the conventional air diffuser using a static mixer has a low oxygen absorption efficiency and is difficult to increase in size. Therefore, the object of the present invention is to improve the efficiency of gas-liquid contact and aeration, release and reaction treatment, effectively purify wastewater etc. with energy saving, space saving, low cost and maintenance-free, and also dissimilar substances in gas It is to provide an aeration processing apparatus that removes and collects. It is another object of the present invention to provide a bioreactor (bioreactor) that can be used for highly efficient enzyme reactions and microbial reactions.

Department for solving problems

  In order to solve the above-mentioned problems, a first air diffusion treatment device of the present invention comprises a passage pipe through which a cylindrical fluid flows, which is provided with a static mixer disposed substantially perpendicular to the longitudinal direction. A gas ejection part that supplies gas into the passage pipe through an air feeding line is disposed at the lower end side of the passage pipe, a spray nozzle is disposed in the gas ejection part, and a gas ejection part of the air feeding pipe is provided. A gas is supplied, and a liquid is introduced into the passage pipe from a lower side of the passage pipe, the gas and the liquid rise in a parallel flow in the passage pipe, and both come into gas-liquid contact inside the passage pipe, An air diffuser that is discharged into the liquid from the upper end side of the passage pipe. In these diffuser processing devices, a static mixer that performs fluid mixing and stirring using fluid flow energy that does not require mixing and stirring power is disposed, and a gas ejection portion is disposed below the stationary mixer, and the ejection energy thereof. Thus, the liquid is introduced from below the gas ejection portion. The liquid and the gas flow in parallel from the lower end side to the upper end side of the passage tube and are gas-liquid contact mixed to perform aeration, diffusion, and reaction processing.

  Further, in the second air diffusion treatment device of the present invention for solving the above-mentioned problems, a cylindrical fluid having a stationary mixer arranged with the longitudinal direction substantially vertical passes therethrough. A gas ejection part that supplies gas into the passage pipe is disposed on the lower end side of the passage pipe and the passage pipe, a static mixer is disposed in the gas ejection part, gas is supplied to the gas ejection part, Liquid is introduced into the passage pipe from the lower side of the passage pipe, and the gas and the liquid rise in a parallel flow in the passage pipe, and both are gas-liquid contact mixed in the passage pipe, and the upper end side of the passage pipe. Air diffuser that is discharged from the liquid into the liquid.

  Further, the stationary mixer disposed in the passage pipe and in the gas ejection portion includes a plurality of right-handed or left-handed spiral blades to form a plurality of fluid passages, The fluid passages communicate with each other through an opening in the longitudinal direction of the blade body, and the blade body is formed of a perforated plate.

The invention's effect

  According to the aeration treatment apparatus of the present invention, power consumption can be significantly reduced by improving the oxygen dissolution efficiency by increasing the gas-liquid contact efficiency under a low pressure loss. Moreover, aeration, dissipation, and reaction processing time are shortened by improving the gas-liquid contact efficiency. In addition, the diffuser processing apparatus has an improved gas supply capacity per unit area, which reduces the horizontal installation area, saves space, and reduces civil engineering and equipment costs. In addition, construction costs such as air supply piping are reduced. Furthermore, since there is no outage due to clogging, maintenance management costs and production management costs are also reduced. Further, since there is no fluid stagnation part (dead region), it is easy to increase the size. Furthermore, the constituent material of the diffuser according to the present invention can be used semipermanently by using a metal such as iron, stainless steel, titanium, hastelloy, etc., and the processing cost can be greatly reduced, and the waste processing cost. Can be eliminated.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic view showing a first embodiment according to the present invention. 2 is a schematic view of the second embodiment, FIG. 3 is a schematic view of the third embodiment, and FIGS. 4A and 4B are an embodiment of a static mixer used in the present invention. FIG. 5 is a basic structural view showing an embodiment of a static mixer used in the present invention. FIG. 6 is a schematic view of an air diffusion treatment apparatus according to the first embodiment of the present invention, and FIG. 7 is a perspective view showing an embodiment of a spray nozzle used in the first embodiment of the present invention. FIG. 8 is a schematic view of the air diffuser according to the second embodiment. FIG. 9 is a partial schematic bottom view of the air diffusion treatment device according to the second embodiment of the present invention. FIG. 10 is a partial schematic perspective view of a gas ejection portion according to the second embodiment of the present invention. FIG. 11 is a schematic cross-sectional view of a diffuser according to a third embodiment of the present invention. FIG. 12 is a block diagram showing an embodiment in the case where the aeration treatment apparatus according to the present invention is applied to the activated sludge aeration process. FIG. 13 is a block diagram showing an embodiment in the case where the present invention is similarly applied to drainage treatment. FIG. 14 is a block diagram showing an embodiment when similarly applied to an exhaust gas treatment apparatus, FIG. 15 is a block diagram showing an embodiment when similarly applied to a biological reaction using an enzyme or a microorganism, and FIG. FIG. 17 is a schematic view showing an aeration treatment apparatus using a diffuser plate system, and FIG.

FIG. 1 is a schematic view showing a first embodiment according to the present invention. A set of static mixers 2 is provided in a passage tube 1 through which a cylindrical fluid arranged with the longitudinal direction substantially vertical flows, and an air feed line is provided in a space 3 below the set. A gas ejection part 5 provided with a spray nozzle for supplying gas via 4 is arranged, and further a liquid introduction part 6 for introducing liquid (FL) is arranged below it. In the diffuser 7 thus configured, gas (FG) is jetted and supplied upward from the gas jetting part 5 to the lower end part of the static mixer 2 in the passage pipe 1 via the space part 3. Then, the liquid (FL) is introduced into the space portion 3 in the passage tube 1 from the liquid introduction portion 6 on the lower end side of the passage tube 1 by the air lift effect generated by the buoyancy of the gas (FG). The gas (FG) and the accompanying liquid (FL) flow in the static mixer 2 while rising in parallel flow, are refined, come into gas-liquid contact, and are discharged into the liquid. As a result, the liquid and the gas are sufficiently in gas-liquid contact, and aeration, emission, or chemical reaction proceeds.
In addition, it is preferable to arrange | position the position of the gas ejection part 5 in the range of 0.2 times-3 times the diameter of the static mixer 2 from the lower end of the static mixer 2. Further, the liquid introducing portion 6 may be used by providing an opening in the tube wall below the passage tube 1. Thereby, the circulation flow of the liquid is improved.

  In the present embodiment, the gas (FG) that rises by ejecting and supplying gas (FG) upward from the spray nozzle of the gas ejection section 5 from below the static mixer 2 via the air feed line 4. The gas (FG) and the liquid (FL) rising while entraining the liquid (FL) introduced from below the passage tube 1 by the air lift effect generated by the buoyancy of As a result, it is refined by the mixing and stirring function, brought into gas-liquid contact, discharged into the liquid, and subjected to aeration, emission or chemical reaction treatment. This gas-liquid mixing and stirring operation is performed with no power and high efficiency. Therefore, it becomes energy saving.

  FIG. 2 is a schematic diagram showing a second embodiment of the present invention, as described above. A set of static mixers 9 are provided in a passage tube 8 through which a cylindrical fluid arranged with the longitudinal direction substantially vertical flows, and an air feed line is formed in a space 10 below the set. A gas ejection part 12 for supplying gas (FG) through 11 is arranged. A static mixer 13 is provided in the gas ejection part 12. Further, a liquid introduction part 14 for introducing a liquid (FL) is disposed below the liquid introduction part 14. In the air diffuser 15 configured as described above, the gas (FG) is disposed in the gas ejection part 12 via the space 10 at the lower end of the static mixer 9 in the passage pipe 8. From the static mixer 13, it is made fine and ejected and supplied. The liquid (FL) is introduced into the space portion 10 from the liquid introduction portion 14 on the lower end side of the passage tube 8 by the air lift effect generated by the buoyancy of the jetted gas (FG). The atomized gas (FG) and the accompanying liquid (FL) flow in the static mixer 9 while rising in parallel flow, come into gas-liquid contact, and are discharged into the liquid. As a result, the liquid and the gas are sufficiently in gas-liquid contact, and aeration, emission, and chemical reaction proceed.

FIG. 3 is a schematic view showing a third embodiment according to the present invention, as described above. A set of static mixers 17 is provided in a passage pipe 16 through which a cylindrical fluid flows, and a gas (FG) is supplied into a space 18 below it through an air feed line 19. A plurality of ejection parts 20 are arranged. The air feed line 19 is piped from above to below through the opening in the longitudinal direction of the static mixer 17.
In the air diffusion treatment device 21 configured as described above, the gas (FG) is ejected upward from the gas ejection unit 20 via the air feeding line 19 from below the stationary mixer 17, thereby supplying the gas Similarly, the liquid (FL) introduced from the liquid introduction part 22 on the lower end side of the passage pipe 16 flows in the static mixer 17 together with the rising gas, and gas-liquid contact proceeds.
Note that the gas-liquid contact efficiency is further improved by disposing and using a static mixer in the gas ejection portion 20 as in the second embodiment of the present invention. The number of gas ejection portions 20 can be appropriately adjusted according to the purpose.

  Further, the passage pipe 16 having a large diameter (diameter of 500 mm or more) can be used, and the gas supply capacity per unit is greatly improved, thereby shortening the processing time. In addition, the piping quantity of the pneumatic line is reduced, and the piping work cost and the maintenance management cost are also reduced. Furthermore, the size of the facility can be easily increased.

  FIG. 4 shows an embodiment of a static mixer used in the present invention. FIG. 4A is a schematic perspective view of a passage tube having a right-handed spiral blade body, and FIG. Similarly, it is a schematic perspective view of a passage tube having a left twist blade body. (A) In the figure, three right-handed blade bodies 25 are provided in a static mixer 24 arranged in a cylindrical passage tube 23. The blade body 25 is formed of a perforated plate having a large number of perforated holes 26. Further, the fluid passage 27 has three fluid passages 27, and the fluid passages 27 communicate with each other over the entire length of the blade body 25 through the opening 28. (B) In the figure, similarly, three left twist blade bodies 31 are provided in a static mixer 30 disposed in a cylindrical passage tube 29. The blade body 31 is formed of a perforated plate having a large number of perforated holes 32. Three fluid passages 33 are provided, and the fluid passages 33 communicate with each other over the entire length of the blade body 31 through the opening 34. In the passage pipes 23 and 29 having the stationary mixers 24 and 30 arranged as shown in (a) or (b), the gas (FG) rising in parallel flow from below the passage pipes 23 and 29. And liquid (FL), while flowing through right or left-handed spiral blades, rotate and split in the right or left direction, merging, reversing and shearing stress action continuously, The liquid is contacted and discharged into the liquid.

  The diameter of the holes (26, 32) drilled in the blade bodies 25, 31 is preferably in the range of 5 to 30 mm, and the aperture ratio of the holes (26, 32) is preferably in the range of 5 to 80%. Furthermore, the rising speed of the gas in the passage pipe (23, 29) is preferably in the range of 0.1 to 10 m / s, more preferably in the range of 0.5 to 5 m / s. Furthermore, the twist angles (spiral angles) of the blade bodies 25 and 31 are preferably 90 °, 180 °, and 270 °, but may be used at 15 °, 30 °, 45 °, 60 °, and the like. When manufacturing a passage tube having a large diameter (diameter 500 mm or more), a blade body (25, 31) having a small twist angle such as 15 ° or 30 ° is manufactured, and for example, three blade bodies are connected to each other. You may arrange | position and use so that (degree) +30 degree + 30 degree = 90 degree. By doing so, the manufacturing process becomes easy, and the manufacturing process cost is also reduced. A combination of blades having different twist angles can be appropriately selected and used depending on the application. The static mixer is not limited to this embodiment, and various static mixers can be used.

FIG. 5 is a basic structural diagram showing an embodiment of a static mixer used in the present invention.
In FIG. 5, spiral right-handed and left-handed blades 36 and 37 having a plurality of fluid passages are provided in a cylindrical passage pipe 35 through a cylindrical space 38. . A cylindrical space 39 is formed below the left twisted blade body 37. The arrangement of the right and left twisted blade bodies 36 and 37 in the passage pipe 35 is not limited to this basic structure diagram, and the combination of the arrangement of the blade bodies 36 and 37 depends on the application, for example, Various uses such as right + left + right, right + left + right + left, etc. are possible. In the cylindrical passage pipe 35 configured as described above, the gas (FG) and the liquid (FL) rising in parallel from the lower side of the passage pipe 35 through the space portion 39 are the left twisted blade body 37. , While flowing through the space 38 and the right twisted blade body 36, they are in gas-liquid contact while continuously repeating the rotation and division in the left direction and the right direction, merging, reversing, and shear stress action, Discharged inside.

  FIG. 6 is a schematic diagram of the air diffusion processing apparatus according to the first embodiment of the present invention. The air diffuser 40 has a stationary mixer 41 provided therein, and a cylindrical passage pipe 43 having a space 42 and a gas supply section 45 having a gas ejection section 44 are connected to the lower part of the static mixer 41. It is comprised by the two support plates 46 to be made. The air feed tube 45 has a gas ejection part 44 provided with a spray nozzle 48 for ejecting gas in the vertical direction, and the opposite side of the gas inlet side is closed. The diffuser 40 thus configured is disposed in the liquid, and the gas (FG) is sent from the gas jetting part 44 through the air feed pipe 45 by a blower or a compressor, and the pressurized gas (FG) is passed through the passage pipe. 43 is supplied into the space 42. The liquid (FG) is entrained from the liquid introduction part 47 at the lower end of the passage tube 43 by the air lift effect due to the buoyancy of the supplied gas (FG), and is allowed to flow through the stationary mixer 41 in parallel while being entrained. Liquid contact is performed and discharged into the liquid, and aeration, release, and reaction process proceed. By using the spray nozzle 48 in the gas ejection part 44, gas (FG) is efficiently disperse | distributed in liquid (FG), and gas-liquid contact efficiency improves. This spray nozzle 48 is preferably used in the shape shown in FIG.

FIG. 8 is a schematic view of an aeration process apparatus according to the second embodiment of the present invention.
As in FIG. 6, the air diffusion treatment device 49 has a cylindrical passage tube 50 having a space portion 52 and a liquid introduction portion 53 below, a cylindrical gas pipe having a stationary mixer 51 and a gas ejection portion 54. It is composed of a feed pipe 55 and two support plates 56 that support the passage pipe 50 and the air feed pipe 55. A stationary mixer 57 formed of a plurality of right-handed or left-handed spiral blades is disposed in the gas ejection portion 54. The gas-liquid contact action between the gas (FG) and the liquid (FL) is the same as in FIG. 6 and will be omitted. However, the static mixer 57 is disposed in the gas ejection portion 54 of the air feeding tube 55. The gas (FG) is refined by the generation of turbulent flow, and rises in the space 52 of the passage tube 50 in parallel with the liquid (FL). The refined gas (FG) and liquid (FL) flow through the static mixer 51 and are brought into gas-liquid contact with high efficiency, discharged into the liquid, and subjected to aeration, emission and reaction processing. proceed.

FIG. 9 is a partial schematic bottom view of the air diffusion treatment device according to the second embodiment of the present invention.
The bottom surface of the air diffuser 58 is composed of three right-handed twisted blades 60 and a cylindrical air pipe 61 provided in a cylindrical passage tube 59. The blade body 60 is formed of a perforated plate having a large number of holes 62 perforated in the thickness direction, and has an opening 63 over the entire length of the blade body 60 in the longitudinal direction.

FIG. 10 is a partial schematic perspective view of the gas ejection portion according to the second embodiment of the present invention. The air delivery pipe 64 is configured in an inverted T shape, and three right-handed spiral blades 66 are disposed in the gas ejection portion 65 to form three fluid passages 67. The passage 67 communicates with the entire length in the longitudinal direction of the blade body 66 through the opening 68. The blade body 66 is formed of a perforated plate having a large number of holes 69 perforated in the thickness direction. In such an air feed pipe 64, the flow of the gas (FG) is caused to flow straight through the opening 68, through the spiral flow flowing along the three spiral blade bodies 66, and through the hole 69 of the blade body 66. A turbulent flow due to the divided flow passing through is generated, and the gas (FG) is refined. By using this refined gas (FG), the gas-liquid contact efficiency is further improved. In addition, the arrangement position of the gas ejection portion 65 is preferably in the range of 0.2 to 5 times the diameter of the passage tube, as to the separation distance from the lower end side of the static mixer installed in the passage tube 59. Furthermore, the supply rate of the amount of air supplied into the gas ejection part 65 is preferably in the range of 2000 to 140000 m ³ / m ² · hour. In addition, you may arrange | position the left-handed spiral blade body in the gas ejection part 65 similarly. Thereby, the gas (FG) ejected while rotating in the left direction by the gas ejection part 65 is caused to flow upward between the gas and the liquid by the right-handed blade body 66 disposed on the upper part of the gas ejection part 65. In the reversal action from the left direction to the right direction, a large shear stress is generated and refined, and the oxygen absorption efficiency is further improved. Further, various combinations of the twisting angle, twisting direction and twisting angle, right twisting and left twisting arrangement of the blade body 66, the hole diameter, the opening ratio of the holes, and the like can be used.

    FIG. 11 is a schematic cross-sectional view of an aeration process apparatus according to the third embodiment of the present invention. In the air diffuser 70, two or more 90 ° right twisted blade bodies 72 are installed in a passage pipe 71 through which a cylindrical fluid flows to form a static mixer 73, and the static mixer 73. A cylindrical air supply pipe 75 for supplying gas through an opening 74 in the inside is disposed, two gas ejection portions 76 are disposed, and a static mixer 77 is provided in the gas ejection portion 76. Has been. The blade body 72 is formed of a perforated plate having a number of perforated holes 78. In the diffuser 70 configured as described above, the gas (FG) is a gas (FG) pressurized by a gas supply means such as a blower, a compressor, or a gas cylinder (not shown). From the lower part of the static mixer 73, it is ejected and supplied through the part 76 and the space part 79. The liquid (FL) is introduced into the space 79 in the passage pipe 71 from the liquid introduction section 80 at the lower end of the passage pipe 71 by an air lift effect generated by the buoyancy of the gas (FG). The gas (FG) and the accompanying liquid (FL) flow through the static mixer 73 while moving up in the passage pipe 71 in a cocurrent manner, and are finely gasified and contacted by mixing and stirring. Discharged into the liquid. As a result, the liquid and the gas are in gas-liquid contact with high efficiency, and aeration, emission, or chemical reaction proceeds continuously. Similarly to the above, the twist direction, twist angle, number of sheets, hole diameter, aperture ratio, diameter, height, etc. of the spiral blade used in the embodiments can be appropriately selected and used according to the application. In the diffuser 70 of this embodiment, the passage pipe 71 has a large diameter (diameter of 500 mm or more), thereby saving energy by reducing the reaction processing time by improving the gas supply capacity per unit and reducing the volume of the aeration tank. In addition, it is possible to achieve a space-saving and maintenance-free operation with a structure in which no fluid stagnation (dead area) occurs.

FIG. 12 is a block diagram showing an embodiment in the case where the aeration treatment apparatus according to the present invention is applied to the activated sludge aeration process.
The air diffuser 81 is disposed at the bottom of the aeration tank 82 that stores the raw water. The blower 83 and the air supply line 84 that supply air to the lower part of the air diffuser 81 and the raw water supply line 85 that supplies the raw water. A treated water discharge line 86 for discharging treated water is also provided. Moreover, it is preferable to install the liquid introduction part of the air diffusion treatment device 81 at a position separated from the bottom surface of the aeration tank 82 by 50 to 200 mm. In the air diffusion processing device 81 configured as described above, the raw water is stored in the air diffusion processing device 81 due to an air lift effect due to the buoyancy of air supplied from below the air diffusion processing device 81 via the blower 83 and the air feed line 84. The raw water and air are mixed and stirred while flowing in parallel flow, oxygen in the air is dissolved in the raw water, and the raw water is purified batchwise or continuously by aerobic microorganisms, and the treated water discharge line 86 More discharged.
Note that the supply rate of the amount of air flowing through the diffuser 81 from below is preferably in the range of 1800 to 21000 m ³ / m ² · hour when the water depth in the aeration tank 82 is 2 to 6 meters. However, More preferably, it is the range of 3600-12000m < ³ > / m < ² > * hour. In addition, the aeration / stirring holding area per unit when the diffuser 81 having a diameter of 150 mm is used is 3 to 8 m ² . Further, the discharge pressure of the blower 83 may be a numerical value obtained by adding the pressure at the water depth and the pressure loss of the air feed line 84. Aeration processing is possible with low pressure loss, saving energy.
Comparing the ventilation resistance of the conventional diffuser plate method and the method of the present invention, the method of the present invention is 1/5 to 3/5. Further, Table 1 shows the result of performance comparison between the conventional methods A, B, C using the static mixer provided in the conventional scattering cylinder and the method of the present invention. As shown in Table 1, according to the method of the present invention, the air supply capacity per unit is 100 Nm ² / m ² · Hr, and the conventional method is 80,12,17 Nm ³ / m ² · Hr. Similarly, the oxygen absorption efficiency is 8.3, 10.5, and 13.0 with respect to 13.5%.

FIG. 13: is a block diagram which shows the Example at the time of applying the aeration process apparatus based on this invention to the discharge process of waste_water | drain.
The air diffusion treatment device 87 according to the present invention is the same as that of the embodiment of FIG. 12, but is arranged at the bottom of the tubular diffusion tank 88 and supplies air to the lower part of the air diffusion treatment device 87. 89, an air feed line 90, a waste water supply line 91 for supplying waste water, and a treated water discharge line 92 for discharging purified treated water. The exhaust line 93 is provided with a cooling device or adsorption device for recovering volatile substances. In the air diffusion treatment device 87 configured in this way, volatile substances such as trichloromethane, trihalomethane, ammonia, chlorine, and krypton in the waste water are transferred to the supplied air side to be diffused and exhausted 93. It is recovered and purified by a cooling device or an adsorption device via The purified air is released into the atmosphere.
Note that the type of gas supplied is not limited to air, and an inert gas such as nitrogen, helium, argon, or carbon monoxide gas can be used as appropriate. For example, it is possible to dissipate dissolved oxygen in the liquid by using nitrogen gas. The supply rate of the gas supplied into the diffuser 87 is preferably in the range of 3600 to 18000 m ³ / m ² · hour in the case of a water depth of 1 to 3 meters in the diffusion tank 88, more preferably 7200 to The range is 15000 m ³ / m ² · hour.

FIG. 14 is a block diagram showing an embodiment when the air diffusion treatment according to the present invention is applied to the exhaust gas treatment.
A plurality of diffuser treatment devices 94 are arranged at predetermined positions in a cylindrical reaction tank 95, and an air supply line 97 for supplying exhaust gas and a water or absorption liquid are supplied below the diffuser treatment device 94 via a blower 96. There are provided a new liquid supply line 98, a discharge line 100 for discharging the absorbent 99 to the outside of the reaction tank 95, and an exhaust line 101 for exhausting the cleaned exhaust gas from the upper part of the reaction tank 95. In the air diffusion treatment device 94 configured as described above, the exhaust gas containing HCl, SO _x , NO _x , NH ₃ , H ₂ S, and soot is diffused through the blower 96 and the air feed line 97. is supplied from below the processing device _{94, NaOH, C a CO 3} , Ca (OH) 2, Mg (OH) 2 composed of an acidic aqueous solution such as an alkaline aqueous solution or _H 2 _SO 4, HCl, such as absorption liquid and gas-liquid The contacted chemical reaction treatment proceeds, and the exhaust gas that has been dissolved or collected in the absorption liquid and cleaned and discharged is released into the atmosphere via the exhaust line 101.
When such an air diffuser 94 is applied to the removal and collection of foreign substances in the exhaust gas, the exhaust gas and the liquid are higher in comparison with the conventional gas-liquid contact method using an air diffuser plate, a dispersion tube, etc. It can be mixed and agitated with efficiency and can be processed for a short time. In addition, the processing speed can be improved to save space and the equipment cost can be reduced. Furthermore, by arranging the diffuser 94 having a large diameter (diameter of 500 mm or more), the processing capacity is improved and the space is further saved. Furthermore, since the stagnation part (dead region) of the fluid in the diffuser processing device 94 is unlikely to occur, adhesion and growth of calcium can be prevented and maintenance management costs can be reduced.

FIG. 15 is a block diagram showing an embodiment in which the aeration treatment apparatus according to the present invention is applied to a reaction by an enzyme or a microorganism.
The air diffuser 102 is disposed at a predetermined position in the cylindrical bioreactor 103, and an air feed line 104 for supplying gas to the lower portion of the air diffuser 102, a raw liquid supply line 105 for supplying the raw liquid, and a reaction product. Product exhaust line 106 for exhausting gas, an exhaust line 107 for exhausting gas from the top of the bioreactor 103, and a circulating liquid line 108 for circulating the stock solution from the liquid level to the lower part of the bioreactor 103. In the bioreactor 103, a catalyst carrier 109 or a biocatalyst carrying an enzyme or a microorganism is present in the liquid. In the air diffusion processing device 102 configured as described above, the gas is supplied from below the air diffusion processing device 102 via the air feed line 104 by gas supply means such as a blower, a compressor, and a gas cylinder (not shown). Is supplied via the stock solution supply line 105 by a supply means such as a pump or pressurization.
The reaction product and gas are discharged to the outside from the reaction product discharge line 106 and the exhaust line 107. In addition, the stock solution forms a circulating flow from the liquid surface of the bioreactor 103 to the lower part through the circulating liquid line 108. The gas and the undiluted solution flow through the diffuser 102 in parallel flow, and the biological reaction proceeds by the biocatalytic function of the enzyme or microorganism in the undiluted solution. When the aeration treatment apparatus 102 of the present invention is used as a bioreactor, the gas flow rate in the bioreactor can be operated in a high gas flow rate range of 0.1 to 5 m / s as compared with the conventional bubble column system. High oxygen transfer rate can be achieved. In addition, the mixing / stirring function that equalizes the flow rate distribution in the bioreactor and equalizes the oxygen transfer rate eliminates the occurrence of dead areas and makes it easy to increase the size of production. More improved. Furthermore, generation of gas channeling is prevented, and gas dispersion in a high viscosity liquid is also improved. Furthermore, by improving the reaction rate, space saving and energy saving are achieved, and production costs are reduced. In addition, it can utilize also as a gas-liquid reaction apparatus which does not use a biocatalyst. In addition, the superficial velocity of the gas in the conventional bubble column is in the range of 0.01 to 0.1 m / s.

FIG. 16 is a schematic view showing an aeration processing apparatus using a conventional diffuser plate method.
In the conventional aeration processing apparatus 110, a large number of diffuser plates 112 are arranged on the bottom surface in the aeration tank 111, and air is supplied to the diffuser plates 112 via the blower 113 and the air supply line 114. The diffuser plate 112 is formed of a fine porous body and generates fine bubbles. The amount of air blown from the general diffuser plate 112 is 50 to 400 L / min. The ventilation resistance is 1000 to 3000 Pa.

FIG. 17 is a schematic diagram showing a conventional diffusion treatment apparatus using a packing method. In the conventional radiation treatment apparatus 115, a cylindrical radiation tower 116 is filled with a regular or irregular packing. Gas and raw water flow countercurrently through the filling 117 and come into gas-liquid contact to be diffused. In the case of a general packing method, the gas supply rate is in the range of 10 to 100 m ³ / m ² · hour.

  In addition, the constituent material of the diffuser according to the present invention can be appropriately selected and used from one kind of metal, ceramics, plastic, glass, or a composite material of these materials. By using a metal material such as stainless steel, it can be used semipermanently and the generation of industrial waste is suppressed.

    It is a schematic diagram which shows 1st Example based on this invention.     It is a schematic diagram which shows 2nd Example based on this invention.     It is a schematic diagram which shows 3rd Example based on this invention.     An example of the static mixer used by this invention is shown. (A) The figure is a schematic perspective view of the channel | path pipe | tube which has a right-handed spiral blade body. (B) The figure is a schematic perspective view of a passage tube having a left-handed spiral blade similarly.     It is a basic structure figure which shows one Example of the static mixer used by this invention.     1 is a schematic view of an aeration processing apparatus according to a first embodiment of the present invention.     It is a perspective view which shows one Example of the spray nozzle used by the 1st Example of this invention.     It is the schematic of the aeration process apparatus which concerns on the 2nd Example of this invention.     It is a partial schematic bottom view of the aeration processing apparatus concerning the 2nd example of the present invention.     It is a partial schematic perspective view of the gas ejection part which concerns on 2nd Example of this invention.     It is a schematic sectional drawing of the aeration processing apparatus concerning 3rd Example of this invention.     It is a block diagram which shows the Example at the time of applying the aeration process apparatus which concerns on this invention to the aeration process of an activated sludge method.     Similarly, it is a block diagram which shows the Example at the time of applying to the discharge process of waste_water | drain.     Similarly, it is a block diagram which shows the Example at the time of applying to an exhaust gas processing apparatus.     Similarly, it is a block diagram which shows the Example at the time of applying to the biological reaction using an enzyme or microorganisms.     It is a schematic diagram which shows the aeration processing apparatus by the conventional diffuser board system.     It is a schematic diagram which shows the diffusion processing apparatus by the conventional filler system.

Explanation of symbols

1, 8, 16, 23, 29, 35, 43, 50, 59, 71: passage pipes 2, 9, 13, 17, 24, 30, 41,
51, 57, 73, 77: Static mixer 3, 10, 18, 38, 39, 42, 52, 79: Space part 5, 12, 20, 44, 54, 65, 76: Gas ejection part 6, 14 , 22, 47, 53, 80: Liquid introduction parts 7, 15, 21, 40, 49, 58, 70,
81, 87, 94, 102: Air diffuser 4, 11, 19, 84, 90, 97, 104: Air line 45, 55, 61, 64, 75: Air pipe

Claims (4)

A plurality of right-handed (clockwise) or left-handed (counterclockwise) spiral blades are provided inside a cylindrical passage tube through which fluid flows, and a plurality of fluids are contained in the passage tube. A passage is formed, the fluid passages communicate with each other through an opening in the longitudinal direction of the blade body, and the blade body includes one stationary mixer made of a perforated plate, and the longitudinal direction is substantially vertical. A cylindrical passage pipe arranged in the manner described above, a liquid introduction section provided at the lower end of the passage pipe, and above the liquid introduction section, below the one static mixer and connected. A plurality of spirals that are twisted clockwise (clockwise) or counterclockwise (counterclockwise) inside a cylindrical passage tube through which a fluid flows and supplies gas to the passage tube through the air supply line. A plurality of fluid passages, and a plurality of fluid passages are formed inside the passage pipe. Communicated via the longitudinal opening, it said sail body comprises a gas ejection portion of another static mixer consisting of a perforated plate is internally provided, and the gas supply means, the rise rate in said passage tube A gas is supplied to the gas ejection part so as to be 0.1 to 10 m / s, and a liquid is introduced into the passage pipe from the liquid introduction part, and the gas and the liquid rise in a parallel flow in the passage pipe. An air diffusion treatment device, wherein gas-liquid contact mixing is performed inside the static mixer of 1 and discharged from the upper end side of the passage pipe.   The diffuser according to claim 1, wherein the diameter of the hole drilled in the blade is 5 to 80 mm.   The diffuser according to claim 2, wherein the aperture ratio of the holes drilled in the blade body is 5 to 80%. The twisting angle (spiral angle) of the blade body is 15 °, 30 °, 45 °, 60 °, 90 °, 180 °, 270 °, or claim 2 according to claim 2 or 3, Air diffuser.

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