JP5559481B2 - Process equipment using vibration by Karman vortex - Google Patents

Description

  The present invention relates to a process apparatus for bringing a processing gas into contact with a granular filler, and more particularly, to a process apparatus that prevents a drift of the processing gas generated in the granular filler using vibrations caused by Karman vortices.

  2. Description of the Related Art Conventionally, as a process apparatus for bringing a granular solid and a gas into contact with each other, a processing tower is filled with a solid and a gas to be processed passes through the processing tower. For example, in a deodorizing apparatus, a processing tower is filled with a granular filler such as activated carbide obtained by burning waste such as activated sludge and activated carbon, and a processing gas containing an odor component is introduced from below the processing tower. The odor component contained in the introduced processing gas is adsorbed by the granular filler while passing through the gap between the granular fillers, and the processing gas is finally made odorless and released to the atmosphere.

  In such a process apparatus that contacts a solid and a processing gas, a portion having a small packing density of the granular packing material is generated in the tower due to the non-uniform packing of the granular packing material or a long-term operation. Since the property is large, the processing gas selectively flows and a drift is formed. Such a drift of the processing gas is also referred to as a gas path, which is a major cause of insufficient solid-gas contact.

  In order to prevent the above-mentioned drift, an attempt has been made to provide a low-frequency vibration generator that suppresses the generation of drift by applying vibration to the packing material at the upper part of the processing tower (Patent Document 1). A speaker is used as the device. Further, studies have been made to provide a vibration device using Karman vortices to adsorb and release gas (Patent Document 2).

  However, when a low-frequency vibration generating device such as a speaker is provided, there is a problem that the cost of the device itself increases. Further, in the apparatus using the Karman vortex, the vibration generated from the Karman vortex is used to promote the adsorption of gas to the adsorbent or to release the gas from the adsorbent. It does not prevent the drift of the processing gas.

Japanese Patent Laid-Open No. 4-300641 (Claim 1 etc.) JP 2004-89774 A (Claim 10, Claim 9)

  The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to prevent a drift generated in a granular filler by utilizing vibration generated by Karman vortices. Is to provide a device.

The process apparatus of the present invention is a process apparatus for bringing a processing gas into contact with a granular filler, a processing tower filled with the granular filler, Karman vortex vibration generating means for generating vibration by Karman vortex, A vibrating member provided in the granular filler in the processing tower, wherein the Karman vortex vibration generating means is provided in a flow path of a processing gas, and the Karman vortex vibration generating means includes the vibration. A member is attached, and the vibration generated by the Karman vortex vibration generating means is transmitted to the vibrating member, and further transmitted from the vibrating member to the granular packing material in the processing tower.

  Here, the Karman vortex is a vortex that occurs alternately left and right on the downstream side of an obstacle when an obstacle is placed in the flow. The object will vibrate from side to side. According to the present invention, by transmitting the Karman vortex vibration generated continuously from the Karman vortex vibration generating means to the granular filler in the processing tower, the packing density of the granular filler can be reduced without providing a mechanical vibration device. It is kept uniform. Thereby, generation | occurrence | production of the drift of the process gas which selectively flows through the part with a small packing density of a granular filler can be prevented. In addition, such a drift may be generated over time with the operation of the process apparatus, but in the process apparatus of the present invention, vibration is always applied to the granular filler by the Karman vortex vibration generating means during operation. It is possible to always prevent the generation of drift.

  Here, the Karman vortex vibration generating means can be provided in the flow path of the processing gas. With this configuration, Karman vortices can be generated by utilizing the flow of processing gas introduced into the processing tower or the processing gas discharged from the processing tower, thereby causing vibration.

Moreover, further comprising a vibration member provided in said particulate filler in said processing tower, the vibration generated by the Karman vortex vibration generating means you configured to be transmitted to the vibration member.

  By providing such a vibrating member, since the vibration generated by the Karman vortex vibration generating means is efficiently transmitted to the granular filler, the effect of preventing the generation of drift can be further enhanced.

  The Karman vortex vibration generating means can be configured to be exchangeable with other Karman vortex vibration generating means having different vibration frequencies. Thereby, it becomes possible to change the frequency to generate | occur | produce according to the granular filler to be used, the flow velocity of process gas, etc. FIG.

  Here, when the average particle diameter of the granular filler is in the range of 50 to 3000 μm, the effect of the present invention is greatly exerted, and particularly in the range of 100 to 1000 μm, the effect is increased. This is because the granular filler having such an average particle diameter is likely to cause a drift in the processing tower.

  Moreover, this invention is suitable when the said granular filler is an adsorbent and the said process gas contains a to-be-adsorbed component.

  Furthermore, it is suitable when the process device is a deodorizing device, the adsorbent is activated carbon or activated carbide, and the adsorbed component is an odor component.

  In the process apparatus of this invention, you may further provide the combustion furnace for burning the said granular filler after processing the said process gas below.

  According to the process apparatus of the present invention, the Karman vortex is continuously generated by the Karman vortex vibration generating means, and the vibration due to the Karman vortex is transmitted to the granular filler, thereby preventing the drift of the processing gas in the granular filler. Is done.

  Further, since the Karman vortex vibration generating means can be provided in the flow path of the processing gas, it is possible to generate vibration without providing a power source.

  Furthermore, since the vibration member is provided in the granular filler, the vibration generated by the Karman vortex vibration generating means is efficiently transmitted to the granular filler, so that the effect of preventing the generation of drift can be further enhanced.

It is the schematic block diagram which looked at the deodorizing apparatus which is one Embodiment of the process apparatus of this invention from the side. It is a top view of the deodorizing apparatus of FIG. It is a figure which shows the coupling | bonding aspect of the Karman vortex vibration generating member and diaphragm in FIG.1 and FIG.2. It is a figure which represents typically the Karman vortex which generate | occur | produces in the apparatus of FIG. It is a figure which shows the other coupling | bonding aspect of the Karman vortex vibration generating member and diaphragm in FIG.1 and FIG.2. It is the schematic block diagram which looked at the deodorizing apparatus which concerns on other embodiment of the process apparatus of this invention from the side. It is a top view of the deodorizing apparatus of FIG. It is a particle size distribution figure of the example activated carbide used as a granular filler in the deodorizing apparatus of FIG.

  Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to the following descriptions.

  FIG. 1 is a cross-sectional view illustrating a schematic configuration of a deodorizing apparatus 10 that is an embodiment of the process apparatus of the present invention, and FIG. 2 is a plan view of the deodorizing apparatus 10. The deodorization apparatus 10 of this embodiment is an apparatus which deodorizes the process gas containing an odor component using activated carbide as a granular filler. The deodorizing apparatus 10 of this embodiment includes a processing tower 12 for filling the activated carbide 11 and a processing gas flow path 13 formed on both sides of the processing tower 12. Is communicated via a tapered communication portion 17. The activated carbide 11 is also filled in the communication portion 17. In the present embodiment, the processing gas is supplied from the upper part of the flow path 13 as shown by the arrow 23, reaches the bottom of the processing tower 12 from the lower part of the flow path 13 through the communication portion 17, and further, is shown by the arrow 22. Thus, it is discharged from the upper part of the processing tower 12 to the outside.

  FIG. 8 shows an example of the particle size distribution of the activated carbide used as the granular filler in the present embodiment. As shown in the figure, the average particle diameter of the activated carbide is 220 μm.

  Moreover, the deodorizing apparatus 10 of this embodiment is provided with a Karman vortex vibration generating member 14, and this Karman vortex vibration generating member 14 has a circular column shape in cross section and penetrates the flow path 13 from the outside of the flow path 13. To the inside of the processing tower 12. A flat plate-like diaphragm 15 as a vibrating member is attached to the tip of the Karman vortex vibration generating member 14 located inside the processing tower 12. FIG. 3 is a view showing the tip portion of the Karman vortex vibration generating member 14 in the processing tower 12. As shown in FIG. 3, a concave groove 16 is formed at the tip of the Karman vortex vibration generating member 14. The diaphragm 15 is attached by fitting the diaphragm 15 into the concave groove 16. The Karman vortex vibration generating member 14 generates a Karman vortex by the flow of the processing gas supplied from above in the flow path 13 to generate vibration.

  FIG. 4 is a schematic diagram showing the state of Karman vortices generated in the flow path 13. When the cylindrical Karman vortex vibration generating member 14 is placed in the flow of the processing gas from above in the flow path 13, the Karman vortices 24 a and 24 b are arranged downstream of the Karman vortex vibration generating member 14. It occurs continuously alternately left and right. At that time, the number (frequency) of Karman vortices per unit time generated from the Karman vortex vibration generating member 14 is expressed by the following equation (1).

f = S _t · V / d (1)
Here, V is the flow velocity of the processing gas (m / s), the S _t called Sutoraharu number is a coefficient which depends on the shape of the cross section of the Karman vortex vibration generation member 14. In the cylindrical member having a circular cross section in the present embodiment, S _t = 0.21. Further, d is a representative dimension (m) of the Karman vortex vibration generating member 14, and in the cylindrical member of the present embodiment, d = diameter.

  When the Karman vortices 24 a and 24 b are continuously generated, the Karman vortex vibration generating member 14 itself is also vibrated, and the vibration is transmitted to the diaphragm 15 in the processing tower 12 and further to the activated carbide 11. Thereby, the packing density of the activated carbide 11 is made uniform, and the drift of the processing gas in the processing tower 12 is prevented.

  As shown in FIG. 1, the deodorizing apparatus 10 of the present embodiment may further include a combustion deodorizing furnace 18 for incinerating used activated carbide. The combustion deodorization furnace 18 is connected to the communication portion 17 via a rotary valve 19. The combustion deodorization furnace 18 in the present embodiment is configured to use a processing gas containing odor as combustion air when the activated carbide is incinerated. Thereby, the processing amount of process gas can be increased.

  Further, in the deodorizing apparatus 10 of this embodiment, the Karman vortex vibration generating member 14 is replaced with another Karman having a different vibration frequency as shown in FIG. 5 according to the particle size and density of the granular filler, the flow rate of the processing gas, and the like. The vortex vibration generating member 24 can be replaced. The Karman vortex vibration generating member 24 shown in the figure has a circular cross section similar to the Karman vortex vibration generating member 14, but its diameter d is small. Therefore, as apparent from the above-described equation (1), if the flow velocity of the processing gas is the same, the frequency can be increased by using the Karman vortex vibration generating member 24. Thus, in the deodorizing apparatus 10 of this embodiment, it is possible to change the frequency to generate | occur | produce according to the granular filler to be used, the flow velocity of process gas, etc.

FIG. 6 is a cross-sectional view illustrating a schematic configuration of a deodorizing apparatus 30 according to another embodiment of the present invention, and FIG. 7 is a plan view of the deodorizing apparatus 30. The deodorizing apparatus 30 of the present embodiment is the same as the deodorizing apparatus 10 of FIGS. 1 and 2 except that a rod-shaped member 34 is used instead of the Karman vortex vibration generating member 14 and the diaphragm 15. Corresponding elements are given the same reference numerals. The rod-shaped member 34 in the present embodiment is provided through the processing tower 12 and the two flow paths 13 provided on both sides thereof. And the vibration generation part 34a in the two flow paths 13 on both sides of the rod-shaped member 34 functions as Karman vortex vibration generation means, and the vibration part 34b in the processing tower 12 functions as a vibration member. Rod-like member 34 in the present embodiment, cross-section is a circular uniform cylindrical, as in the embodiment of FIG. 1 is a Sutoraharu number S _t = 0.21 in the formula (1). Also in the deodorizing apparatus 30 of the present embodiment, the vibration generated in the vibration generating portion 34a of the rod-shaped member 34 is transmitted to the vibrating portion 34b, the packing density of the activated carbide 11 is made uniform, and the drift of the processing gas in the processing tower 12 Is prevented.

  In the deodorizing devices 10 and 30 described above, the vibration generated by the Karman vortex vibration generating means is transmitted to the granular packing material in the processing tower, so that the packing density of the granular packing material is uniform without providing a mechanical vibration device. And the generation of the drift of the processing gas is prevented. Such a drift of the processing gas may be generated and changed over time with the operation of the process apparatus, but in the deodorizing apparatus of this embodiment, the vibration is always generated by the Karman vortex vibration generating means during operation. Therefore, the generation of drift can always be prevented. Furthermore, the particulate filler such as the activated carbide 11 may adhere to the inner wall of the processing tower 12 in a lump due to moisture in the processing gas, but in the deodorizing apparatuses 10 and 30 of the present embodiment, The vibration by the Karman vortex vibration generating means can be exerted on the entire deodorizing apparatus. Thereby, the problem of adhesion of the granular filler that may occur in the entire deodorizing apparatus for the granular filler can be solved.

  In the above description, the flat plate-like diaphragm 15 has been described as the vibrating member. However, for example, a corrugated plate can also be used. In the above description, the case where the vibration due to the Karman vortex is generated by the flow of the processing gas before coming into contact with the activated carbide 11 has been described. Further, Karman vortex vibration generating means may be provided in the discharge flow path.

  According to the present invention, in the process apparatus for bringing the processing gas into contact with the granular filler, the packing density of the granular filler can be made uniform without providing a mechanical vibration device. It can be used in fields such as solid reaction equipment and exhaust gas treatment equipment.

DESCRIPTION OF SYMBOLS 10,30 Deodorizing apparatus 11 Activated carbide 12 Processing tower 13 Flow path 17 Communication part 14 Karman vortex vibration generating member 15 Diaphragm 16 Concave groove 24 Karman vortex vibration generating member 24a Karman vortex 24b Karman vortex 18 Combustion deodorizing furnace 19 Rotary valve 34 Rod shape Member 34a Vibration generating part 34b Vibration part

Claims (7)

A process device for bringing a processing gas into contact with a granular filler,
A treatment tower filled with the granular filler;
Karman vortex vibration generating means for generating vibration by Karman vortex,
A vibration member provided in the granular filler in the processing tower,
The Karman vortex vibration generating means is provided in the flow path of the processing gas,
The Karman vortex vibration generating means is attached with the vibration member,
The process apparatus characterized in that the vibration generated by the Karman vortex vibration generating means is transmitted to the vibrating member, and further transmitted from the vibrating member to the granular packing material in the processing tower.   The process apparatus according to claim 1, wherein the Karman vortex vibration generating means is provided in a flow path of the processing gas.   The process apparatus according to claim 1, wherein the Karman vortex vibration generating unit is configured to be exchangeable with another Karman vortex vibration generating unit having a different frequency of generated vibration.   The process apparatus according to claim 1, wherein an average particle diameter of the granular filler is in a range of 50 to 3000 μm.   The process apparatus according to claim 1, wherein the granular filler is an adsorbent, and the processing gas contains an adsorbed component.   The process apparatus according to claim 5, wherein the process apparatus is a deodorizing apparatus, the adsorbent is activated carbon or activated carbide, and the adsorbed component is an odor component.   The process apparatus according to any one of claims 1 to 6, further comprising a combustion furnace for burning the granular filler after the processing gas is processed below the process apparatus.

Images