JPH10263377A - Air bubble diffusing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to uniformly disperse humidifying water into respective sub-headers mounted with plural pieces of blowing nozzles and to make the device compact by providing a main header in an approximately horizontal direction with throttling mechanism and humidifying water suction mechanisms near the junctures where plural pieces of these sub-headers are connected in approximately horizontal direction. SOLUTION: The air bubble spraying device consisting of the main header 20 in the approximately horizontal direction and the sub-headers 24 mounted with the plural blowing nozzles 22 connected approximately horizontally thereto is provided with the throttling mechanism 26 and the humidifying water suction mechanisms 28 near the junctures between the main header 20 and the sub-headers 24. The flow velocity of the gases flowing to sub-headers 24 through the throttling mechanism 26 is made higher than the flow velocity of the gases in the main header 20. The static pressure is changed to a dynamic pressure and the pressure of the throttling sections is dropped by the throttling mechanism 26 and, therefore, the humidifying water 30 is sucked by the humidifying water suction mechanisms 28. This humidifying water 30 is uniformly dispersed in the form of mists into the respective sub-headers 24 and the liquid level of the humidifying water in the main header 20 is lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air bubble dispersing apparatus used for dispersing air bubbles in a slurry liquid, and more particularly to an air bubble dispersing apparatus used in an oxidation process of a flue gas desulfurization equipment by a lime gypsum method. is there.

[0002]

2. Description of the Related Art Conventionally, as an apparatus for dispersing air bubbles in a slurry liquid, such as an oxidation step of a flue gas desulfurization equipment by a lime-gypsum method, particularly an apparatus used for large-sized equipment, FIG.
As shown in FIG. 1, a bubble dispersing apparatus in which a plurality of sub-headers 14 each having a plurality of blowing nozzles 12 attached thereto are connected to a main header 10 is used. When dispersing air bubbles such as air in a slurry liquid, such as in the oxidation process of flue gas desulfurization equipment using the lime-gypsum method, a blowing nozzle for dispersing bubbles in the slurry liquid is used. Slurry components are precipitated and pressure loss increases, and therefore, problems such as poor dispersion of bubbles and deterioration in performance such as desulfurization occur. It is considered that the cause of the scale formation due to the precipitation of the slurry component is that the slurry attached to the inner surface of the blowing nozzle comes into contact with the dry air to evaporate and concentrate the solvent component. In order to prevent the precipitation of the slurry component at the nozzle tip,
For example, in the case of the lime-gypsum method, a small amount of water (humidifying water) or a small amount of water vapor is mixed into the blown air to humidify the blown gas to a saturated or supersaturated state, and the slurry component is reduced. It is common to prevent concentration and precipitation.

As shown in FIG. 22, a nozzle described in Japanese Patent Laid-Open No. 6-218227 has a plurality of blowing nozzles 12 mounted on a main header 10 in a substantially horizontal direction.
Is a bubble dispersing device in which the sub-header 14 into which is inserted is connected in a substantially horizontal direction, so that the liquid level of the humidified water 16 due to excess water is formed in the main header 10,
The humidifying water 16 is supplied to the blowing nozzle 12 together with a gas such as air.
By ejecting from the slurry, concentration and precipitation of the slurry component are prevented. Reference numeral 18 denotes an insertion portion of the blowing nozzle.
In the method of spraying water into the gas, it is difficult to humidify the gas to a saturated or supersaturated state because it is a short-time contact, and the gas and water are separated in the main header and sub-header. It is necessary to disperse (excess water) to all the blowing nozzles.

[0004]

When water is mixed into the blown gas, the amount of water to be mixed is limited due to the balance of water in the system. Is important. As described above, the method of spraying water into the blown gas is difficult to humidify the gas to a saturated or supersaturated state by itself, and most of the spray water is separated from the gas in the nozzle header,
Since most of the water comes out from the blowing nozzles upstream of the gas flow, it is difficult to distribute water uniformly to all the blowing nozzles. Therefore, in order to uniformly disperse the humidified water separated in the nozzle header to each blowing nozzle, a method of inserting the blowing nozzle into the nozzle header and providing an insertion portion has been adopted. However, particularly in the case of a large-sized apparatus, as shown in FIG. 21, a plurality of sub-headers each having a plurality of blowing nozzles attached to the main header are installed. However, it is difficult to uniformly disperse the humidifying water in all the blowing nozzles only by taking measures such as providing the insertion portion of the blowing nozzle in the sub header as shown in FIG. . Further, in this case, about half of the cross section of the main header is occupied by water, and the gas flow path is reduced. Therefore, it is necessary to increase the diameter of the main header and the sub header.

Similarly, the method disclosed in Japanese Patent Application Laid-Open No. 6-218227 is an attempt to provide an insertion portion in a blowing nozzle to make the dispersion of humidified water uniform, but the above problem is completely solved. It is not a means to be solved. In other words, this method is effective in uniformly discharging the humidification water distributed to each sub-header from each blow nozzle, but when the humidification water is not uniformly dispersed from the main header to each sub-header. The effect cannot be exhibited at all. In the main header, the pressure distribution is caused by the flow of the blown gas and the liquid level does not become constant.
Due to the generation of waves on the liquid surface, a large amount of water is distributed to the subheader at the high part of the liquid surface and the part covered with the wave, and there is a possibility that humidified water is hardly distributed to the other subheaders As a result, it is difficult to uniformly disperse the humidification water in each blowing nozzle. In addition, if the insertion portion of the blowing nozzle can be finely adjusted, the above problem can be solved to some extent, but not only does the shape of the nozzle become complicated,
There is a problem in that fine adjustment of all of the many blowing nozzles requires an extra large amount of labor. In addition, when a small amount of water vapor is mixed in the blow gas, the inside of the blow nozzle can be uniformly humidified.
Expensive energy is lost, which is not preferable.

The present invention has been made in view of the above points, and an object of the present invention is to employ a predetermined structure in the vicinity of a connection portion between a main header and a sub-header to which a blowing nozzle is attached in an air bubble dispersion device. Accordingly, it is an object to provide a compact bubble dispersing device capable of uniformly dispersing the humidifying water in each subheader and increasing the gas flow path cross-sectional area to reduce the diameter of the main header and the subheader. By uniformly dispersing the humidifying water from the main header to each sub-header, a small amount of humidifying water is evenly distributed to a large number of blowing nozzles, preventing the precipitation of slurry components at the tip of the blowing nozzle. Low pressure loss, good air bubble dispersion, simple shape that contributes to performance improvement in oxidation process of flue gas desulfurization equipment by lime-gypsum method Is an object of the present invention to provide an inexpensive bubble dispersing device.

[0007]

In order to achieve the above object, the present invention provides an air bubble dispersing device comprising a sub header having a plurality of blowing nozzles mounted on a substantially horizontal main header in a substantially horizontal direction. In a plurality of connected bubble dispersing devices, a throttle mechanism and a humidifying water suction mechanism are provided near the connection between the main header and the sub-header (see FIGS. 1 to 7). As described above, the throttle mechanism is provided near the connection between the main header and the sub-header, so that the gas flow rate in the throttle section is higher than the gas flow rate in the main header. In addition, a humidifying water suction mechanism extending from near the bottom of the main header to near the throttle will be installed.
In the above-described apparatus of the present invention, the throttle mechanism can be any one of an orifice, a venturi, and a reducer (see FIGS. 3 to 7). The humidification water suction mechanism may be a humidification water suction tube whose one end is located in the humidification water in the main header and whose other end is located near the squeezing mechanism in the sub header (FIGS. 1, 3 to 3). 7). As the throttle mechanism, various shapes other than the above-mentioned orifice, venturi, and reducer are conceivable, and various forms of attachment of the humidifying water suction mechanism are also conceivable.

In the apparatus of the present invention, a substantially inverted T-shaped sub-header to which a plurality of blowing nozzles are attached is provided substantially below the main header in a substantially horizontal direction.
A plurality of bubble dispersion devices connected in a substantially vertical direction,
The connection portion of the substantially inverted T-shaped sub-header is inserted into the main header to form an insertion portion projecting into the main header, and a cut portion is provided in this insertion portion. (See FIGS. 8 to 15). Examples of the shape of the notch include a slit as shown in FIGS. 9, 10 and 13 and a notch as shown in FIGS. 11, 12 and 15. Also, FIGS. 9, 11, 13, and 15
As shown in FIG.
In addition, as shown in FIG. 12 and the like, there are cases where two cut portions are provided substantially in parallel.

In the apparatus of the present invention, a substantially inverted T-shaped sub-header to which a plurality of blowing nozzles are attached is provided substantially below the main header in a substantially horizontal direction.
A plurality of bubble dispersion devices connected in a substantially vertical direction,
A connection portion of the substantially inverted T-shaped sub-header is inserted into the main header to form an insertion portion projecting into the main header, and a small hole is provided in the insertion portion. (See FIGS. 16 and 17). In FIG. 16, two small holes are provided in the insertion portion of the blowing nozzle.
It can be more than one. Also, small holes can be provided on both sides of the insertion portion of the blowing nozzle.

In the apparatus of the present invention, a substantially inverted T-shaped sub-header to which a plurality of blowing nozzles are attached is provided substantially below the main header in a substantially horizontal direction, and
A plurality of bubble dispersion devices connected in a substantially vertical direction,
The connection portion of the substantially inverted T-shaped sub-header is inserted into the main header to form an insertion portion protruding into the main header, and the tip of this insertion portion forms an oblique cut portion. (See FIGS. 18 and 19).
In FIGS. 18 and 19, the insertion portion of the blowing nozzle is cut straight and obliquely, but the cut surface may not be straight as long as it is not cut horizontally.

In the apparatus of the present invention, a substantially inverted T-shaped sub-header to which a plurality of blowing nozzles are attached is provided substantially below the main header in a substantially horizontal direction.
A plurality of bubble dispersion devices connected in a substantially vertical direction,
A connection portion of the substantially inverted T-shaped sub-header is inserted into the main header to form an insertion portion projecting into the main header, and at least one narrow groove is formed on an outer surface of the insertion portion. (See FIG. 1).
3, FIG. 14, FIG. 15, FIG. 17, FIG. 19, FIG. 20).
13, 14, 15, 17, 19, and 20 show narrow grooves in a substantially vertical direction, they need not necessarily be in a vertical direction, and need not be linear. Is also good.

Further, in the above-mentioned apparatus of the present invention, at least one at least one extending from the inner surface of the main header to the lower end or the small hole of the cut portion is provided on the outer surface of the insertion portion of the substantially inverted T-shaped sub header. It is desirable to provide a narrow groove (FIGS. 13, 14,
15 and 17). By providing such a narrow groove, water is sucked up to the cut portion or the small hole by capillary action, and uniform dispersion of water can be achieved. Further, in the above-described device of the present invention, at least one narrow groove extending from the inner surface of the main header to a substantially lowermost position of the oblique cut portion is formed on the outer surface of the insertion portion of the substantially inverted T-shaped sub header. It is desirable to provide them (see FIG. 19). Also in this case, the water is sucked up to the lower end of the oblique cut portion by the capillary phenomenon, so that the water can be uniformly dispersed. In the above-described apparatus of the present invention, the tip of the insertion portion of the substantially inverted T-shaped sub-header is cut substantially horizontally, and the outer surface of this insertion portion is inserted from the inner surface of the main header into the insertion portion. It is also possible to provide at least one narrow groove that reaches the tip of the (see FIG. 20). When a narrow groove is provided in the horizontal cut header, it is preferable that the position of the narrow groove is in a range of about 180 degrees downstream with respect to the gas flow. However, it is also possible to provide a narrow groove on the front side or the like. In FIG. 20, three narrow grooves are provided as an example, but it is of course possible to provide one, two, or four or more grooves.

[0013]

Embodiments of the present invention will be described below in detail. 1 to 7 show a first embodiment of the present invention.
1 shows a foam dispersion device according to an embodiment. In the present embodiment, in a bubble dispersing device including a main header and a subheader to which a blowing nozzle is connected substantially horizontally, a squeezing mechanism and a humidifying water suction mechanism are provided in the vicinity of a connection between the main header and the subheader. This is the case when it is installed.
As shown in FIG. 1, a plurality of (in FIG. 1, one and two of a large number of blowing nozzles are shown) blowing nozzles 22 are attached to the main header 20 in the substantially horizontal direction. The sub-header 24 is connected in a substantially horizontal direction,
A throttle mechanism 26 and a humidified water suction mechanism 28 are provided near the connection between the main header 20 and the sub header 24. The main header 20 has at least one
Sub-headers 24 are connected, and usually a plurality of sub-headers 24 are connected. Also, as the size of the device increases, the number of subheaders 24 to be connected also increases. In the main header installed in the slurry liquid,
A gas such as air and water at a fixed ratio with respect to the gas amount are blown from one side or both sides, and bubbles are dispersed into the slurry liquid from each blowing nozzle of the sub header connected to the main header.

As described above, the aperture mechanism 26 is provided in the vicinity of the connection between the main header 20 and the sub header 24,
The throttling mechanism 26 is smaller than the gas flow rate in the main header 20.
The flow velocity of gas flowing through the sub header 24 through the sub header 24 is increased. In addition, a humidification water suction mechanism 28 such as a humidification water suction tube extending from the vicinity of the bottom of the main header 20 to the vicinity of the squeezing mechanism 26 is installed, and the humidification water 30 in the main header 20 can be uniformly dispersed in the sub header 24. To do. The squeezing mechanism 26 and the humidifying water suction mechanism 28 shown in FIG.
Is as shown in FIG. When the gas flow rate in the throttle unit increases by the throttle mechanism 26, the static pressure changes to dynamic pressure, so that the pressure in the throttle unit decreases, and the humidification water 30 is sucked from the humidification water suction mechanism 28 such as a humidification water suction tube. Then, the humidification water 30 is sprayed and uniformly dispersed in each sub header 24, and the humidification water level in the main header 20 is lowered. As a result, the cross-sectional area of the gas passage increases, so that the diameters of the main header 20 and the sub-header 24 can be reduced. Note that the amount of change in pressure at the throttle is proportional to the difference between the squares of the gas flow velocity, and since the throttle is short, the pressure loss at the throttle is small and the loss of energy and the like is small.

As an example of the aperture mechanism 26, FIG.
A venturi type throttle 32 as shown in FIG. 4, an orifice type throttle 34 as shown in FIG. 4, a reducer type throttle 36 as shown in FIG. 5, and the like, the gas flow rate in the throttle portion is smaller than the gas flow rate in the main header. Of course, as long as the shape becomes larger, it is possible to adopt other stop shapes other than the shapes shown in FIGS. As an example of the humidification water suction mechanism 28, as shown in FIGS.
One end is located in the humidification water 30 in the main header 20,
The aperture mechanism in the sub header 24 (Venturi type aperture 3
2, orifice type throttle 34, reducer type throttle 36)
A humidified water suction tube 38 or the like, the other end of which is located in the vicinity, may be cited, but the humidified water suction tube 38 may be mounted in various forms depending on the shape of the throttle mechanism and the like. It is also possible to employ a humidification water suction mechanism other than the humidification water suction tube as long as it is capable of uniformly dispersing the mist in the vicinity of the throttle portion in the form of a mist.

As shown in FIG. 3, as an example, when the shape of the aperture mechanism is a venturi, the venturi type aperture 32 is sandwiched between the flange 40 of the main header 20 and the flange 42 of the sub header 24. The two flanges 40 and 42 are fixed with bolts, nuts and the like (not shown), and the upper end of the humidified water suction tube 38 whose lower end is in the humidified water 30 of the main header 20 is located near the throttle portion. As shown in FIG. 4, as an example, when the shape of the throttle mechanism is an orifice, the orifice type throttle 34 is used.
Between the flange 40 of the main header 20 and the flange 42 of the sub header 24,
42 is fixed with bolts, nuts, etc. (not shown),
The upper end of the humidification water suction tube 38 whose lower end is in the humidification water 30 of the main header 20 is connected to the lower orifice type throttle 3.
4 and the humidification water outlet 44 is formed above the lower orifice type throttle 34. Note that the upper end of the humidified water suction tube 38 may be located near the throttle. As shown in FIG. 5, as an example, when the shape of the aperture mechanism is a reducer, the flange 48 of the sub header 46 having the reducer type aperture 36 and the flange 40 of the main header 20 are bolts, nuts, etc. (Not shown), and the lower end is the main header 2
The upper end of the humidified water suction tube 38 in the humidified water 30 is positioned near the throttle.

In FIG. 3, the aperture is concentric with the sub-header, and in FIG. 4, the aperture is eccentric with the sub-header. However, the aperture may be concentric or eccentric. However,
If the throttle section is configured to be eccentric below the subheader, the water suction height is reduced, and the humidified water can be more uniformly dispersed even with a small change in the gas flow velocity. In addition, as can be seen from FIGS. 3 and 4, especially when the shape of the aperture mechanism is a venturi or an orifice, the existing device can be used as it is,
No equipment or construction costs are required. 6 and 7, the sub-header 24 is inserted into the main header 20, the throttle mechanism 26 is provided at the tip of the insertion section 50, and the humidifying water suction mechanism 28 is provided. Can also. As an example, FIG. 6 shows a configuration in which an orifice is adopted as a squeezing mechanism and a humidifying water suction tube is used as a humidifying water sucking mechanism. In FIG. 7, a reducer is adopted as a squeezing mechanism and humidifying water is used as a humidifying water sucking mechanism. The structure using a water suction tube is shown. In the configuration shown in FIGS. 6 and 7, it is of course possible to employ a venturi as the aperture mechanism at the tip of the insertion portion, and it is also possible to employ another aperture mechanism and a humidifying water suction mechanism. .

FIGS. 8 to 15 show a bubble dispersing apparatus according to a second embodiment of the present invention. In the present embodiment, a cut portion is provided at the insertion portion of the substantially inverted T-shaped sub header projecting into the main header. As shown in FIG. 8, a plurality of (in FIG. 8, four out of a large number of blowing nozzles are shown) blowing nozzles 22 are attached to the lower side of the main header 20 in the substantially horizontal direction. A substantially inverted T-shaped sub-header 52 is connected in a substantially horizontal direction and in a substantially vertical direction, and a connection portion of the substantially inverted T-shaped sub-header 52 is inserted into the main header 20 to form a main header. An insertion portion 54 protruding into the inside 20 is formed.
A notch 56 is provided at the tip of the insertion portion 54, and the liquid level of the humidified water 30 due to the excess water in the main header 20 is at a level near the lower end of the notch 56 (the notch 56). Slightly higher than the lower edge of the Reference numeral 58 denotes humidification water in the sub header. At least one substantially inverted T-shaped sub-header 52 is connected to the main header 20, and usually a plurality of sub-headers 52 are connected. Also, as the size of the device increases, the number of subheaders 52 to be connected also increases. A gas such as air and a certain percentage of water with respect to the gas amount are blown into the main header installed in the slurry liquid from one side or both sides,
Bubbles are dispersed into the slurry liquid from each blowing nozzle of the substantially inverted T-shaped sub-header connected to the main header.

As an example of the shape of the cut portion 56,
A slit 60 as shown in FIGS. 9, 10, 13 and 14 and a notch 6 as shown in FIGS. 11, 12 and 15.
2 and the like, but if the flow path of the water is restricted and the water can be uniformly dispersed in the sub-header, it is of course possible to adopt other cut shapes other than the shapes shown in FIGS. 9 to 15. In addition, even when notches are provided in the insertion portion, FIG.
The notch is not limited to the substantially V-shaped notch as shown in FIGS. 12 and 15, and may be substantially U-shaped or have another shape. In addition, as shown in FIGS. 9, 11, 13 and 15, the slit 60 and the notch 62 are provided at one place, or as shown in FIGS. 10 and 12, the slit 60 and the notch 62 are arranged diagonally. In some cases, two places may be provided substantially in parallel. However, three or more places may be provided, and not only in substantially parallel, but also in a right angle direction or another angle. In this case, it is desirable to provide the cut portion in a range of about 180 degrees on the rear side (downstream side) as viewed from the flow direction of the gas flowing in the main header, but the cut portion is provided on the front side in the gas flow direction or the like. It is also possible.

The bubble dispersing device shown in FIG.
Subheader structure as shown in (insertion and notch)
Is adopted, even if the liquid level of the humidifying water 30 is changed due to the flow of gas in the main header 20 and the level of the liquid changes, the slit 60 or the notch Since a notch 56 such as 62 is provided,
The flow path of water is restricted, and water can be uniformly dispersed in all the subheaders 52 without a large amount of water flowing out of one subheader 52. Further, since the humidifying water 30 is atomized by the gas suction action in the cut portion 56, the humidifying water 30 is uniformly dispersed in the sub header 52, and as a result, each blowing nozzle attached to the sub header 52 The humidification water 30 is also uniformly dispersed in the inside 22, and the cleaning effect on the inner surface of the blowing nozzle 22 is enhanced. Therefore, it is possible to uniformly disperse water in all the blowing nozzles with a limited small amount of humidifying water and prevent scale formation.
Further, the notch 5 is formed in a range of about 180 degrees on the rear side (downstream side) when viewed from the flow direction of the gas flowing in the main header 20.
When the subheader 6 is provided, the front side (upstream side) of the subheader 52 functions as a breakwater to further reduce the influence of the wave caused by the gas flow.
2 while maintaining the liquid level of the humidifying water 30 until the subheader 5 even from the most downstream notch 56 under a limited amount of water.
Water can be evenly dispersed in the inside 2. FIG.
3. As shown in FIG. 14, in the case where the narrow groove 66 extending from the inner surface 64 of the main header to the slit 60 is provided, in addition to the above-described functions and effects, water is drawn up to the slit 60 by the capillary action of water. In addition, the influence of the liquid level is further reduced, and uniform dispersion of water can be achieved. Similarly, FIG.
As shown in FIG. 5, the notch 6
Also in the case of providing the narrow grooves 66 reaching up to 2, the water is sucked up to the notch 62 by the capillary action of water, so that the influence of the liquid level is further reduced and uniform dispersion of water can be achieved.
Providing a narrow groove is useful when providing multiple slits,
The present invention can be applied to a case where a plurality of notches are provided.

FIGS. 8, 16 and 17 show a bubble dispersing device according to a third embodiment of the present invention. In the present embodiment, a small hole is provided in the insertion portion of the substantially inverted T-shaped sub-header projecting into the main header. In FIG. 8, the cutout portion 56 is provided with the cutout portion 56. However, in this embodiment, a small hole 68 is provided instead of the cutout portion 56. As shown in FIG. 16, the insertion portion 54 is provided with two small holes 68, and the liquid level of the humidifying water is desirably maintained at a level slightly higher than that of the lower small holes. It is of course possible to provide one or three or more small holes 68, and in this case also, it is desirable that the liquid level is slightly higher than the lower small hole. When a plurality of small holes are provided, they may be provided not only at the top and bottom but also at the same level. Further, it is desirable to provide the small holes 68 in a range of about 180 degrees on the rear side (downstream side) when viewed from the flow direction of the gas flowing in the main header. Further, the small hole 68 is formed in the sub header 52.
Can be provided on both sides of the insertion portion 54 of the first embodiment.

When the sub-header structure (insertion portion and small hole) as shown in FIG. 16 is employed in the bubble dispersing nozzle shown in FIG. Even if a wave is generated on the liquid level of the liquid level 30 and the liquid level fluctuates, the small hole 68 is provided in the protruding insertion portion 54, so that the flow path of the water is restricted, and one sub header 5
Water can be evenly dispersed in all the subheaders 52 without a large amount of water coming out of 2. Further, since the humidifying water 30 is atomized by the gas suction action from the small holes 68, the humidifying water 30 is uniformly dispersed in the sub-header 52. As a result, the humidifying water 30 in each of the blowing nozzles 22 attached to the sub-header 52 is removed. The humidification water 30 is evenly dispersed,
The cleaning effect on the inner surface of the blowing nozzle 22 is enhanced. Therefore, it is possible to uniformly disperse water in all the blowing nozzles with a limited small amount of humidifying water and prevent scale formation.
The small hole 68 is formed in a range of about 180 degrees on the rear side (downstream side) when viewed from the flow direction of the gas flowing in the main header 20.
Is provided, the front side (upstream side) of the subheader 52 functions as a breakwater, and further reduces the influence of the wave caused by the gas flow. , Water can be evenly dispersed in the sub-header 52 even from the most downstream small hole 68 under a limited amount of water. In addition, as shown in FIG. 17, when the narrow groove 66 extending from the inner surface 64 of the main header to the small hole 68 is provided, in addition to the above-described effects, water is drawn up to the small hole 68 by the capillary action of water. Therefore, the influence of the liquid level is further reduced, and uniform dispersion of water can be achieved. Other configurations and operations are the same as those in the second embodiment of the present invention.

FIGS. 8, 18 and 19 show a bubble dispersing device according to a fourth embodiment of the present invention. In the present embodiment, an oblique cut portion is formed at the insertion portion of the substantially inverted T-shaped sub header projecting into the main header. In FIG. 8, the cutout portion 56 is provided in the insertion portion 54, but in the present embodiment, an oblique cut portion 70 is provided instead of the cutout portion 56. FIG.
As shown in the figure, the tip of the insertion portion 54 is cut obliquely straight to form an oblique cut portion 70. If the lowest portion of the oblique cut portion 70 is slightly lower than the liquid level of the humidifying water, The shape of the oblique cut portion 70 is not limited to a straight shape, but may be any shape. Further, it is desirable to form the oblique cut portion 70 so that the rear side (downstream side) when viewed from the flow direction of the gas flowing in the main header is lower.

If the sub-header structure (insertion portion and oblique cut portion) as shown in FIG. 18 is employed in the bubble dispersing nozzle shown in FIG. 8, humidification occurs due to the gas flow in the main header 20 and the like. Even if a wave is generated on the liquid surface of the water 30 and the liquid surface level fluctuates, since the oblique cut portion 70 is provided in the projecting insertion portion 54, the flow path of the water is restricted, and
Without a lot of water coming out of the book subheader 52,
Water can be evenly dispersed in all the sub headers 52. Further, since the humidifying water 30 is formed into a mist at the lower end of the oblique cut portion 70 by a gas suction action, the humidifying water 30 is uniformly dispersed in the sub-header 52, and as a result, each blowing nozzle attached to the sub-header 52 The humidification water 30 is also uniformly dispersed in the inside 22, and the cleaning effect on the inner surface of the blowing nozzle 22 is enhanced. Therefore, it is possible to uniformly disperse water in all the blowing nozzles with a limited small amount of humidifying water and prevent scale formation. Also, main header 2
Back side (downstream side) when viewed from the direction of flow of gas flowing inside 0
When the diagonally cut portion 70 is formed so that is lower, the high portion of the diagonally cut portion 70 functions as a breakwater,
Since the influence of the wave due to the gas flow is further reduced, the liquid level of the humidifying water 30 is maintained up to the downstream sub-header 52, and the lowermost oblique cut portion 7 is provided under a limited amount of water.
Water can be evenly dispersed in the subheader 52 even from 0. As shown in FIG. 19, a narrow groove 66 extending from the inner surface 64 of the main header to the lower end of the oblique cut portion 70 is formed.
When water is provided, in addition to the above-described functions and effects, water is sucked up to the lower end of the oblique cut portion 70 by the capillary action of water, so that the influence of the liquid level is further reduced, and uniform dispersion of water can be achieved. Other configurations and operations are the same as those in the second embodiment of the present invention.

FIGS. 8 and 20 show a bubble dispersing device according to a fifth embodiment of the present invention. In this embodiment,
This is a case where a thin groove is provided in a horizontal cut header in which an insertion portion of a substantially inverted T-shaped sub header protruding into the main header is cut substantially horizontally. In FIG. 8, the insertion portion 54 is provided with the cut portion 56, but in the present embodiment, a narrow groove 72 is provided instead of the cut portion 56. As shown in FIG. 20, a narrow groove 72 extending from the inner surface 64 of the main header to the tip of the insertion portion 54 is provided in the insertion portion 54 of the horizontal cut header in a substantially vertical direction. In this case, it is preferable that the position of the narrow groove 72 be within a range of about 180 degrees downstream of the gas flow. However, it is also possible to provide the narrow groove 72 on the front side or the like. Note that FIG.
In the example, three narrow grooves 72 are provided as an example, but it is of course possible to provide one, two, or four or more.
By providing the narrow groove 72, water is sucked up by the capillary action, so that the influence of the liquid level is reduced and uniform dispersion of water can be achieved. Instead of making the upper end of the insertion portion of the sub-header a horizontal cut, it is also possible to have another arbitrary shape. Other configurations and operations are the same as those of the second embodiment of the present invention.
This is the same as in the case of the form. It should be noted that the above-described second to fifth embodiments of the present invention can be implemented in combination. In the first to fifth embodiments of the present invention described above, an insertion portion is provided in the blowing nozzle attached to the sub header, and the insertion portion 54 of the sub header is provided in this insertion portion.
Notches, small holes, slits and notches, etc.
With a configuration in which at least one of the oblique cut portion and the narrow groove is provided, the humidifying water can be more uniformly dispersed in each blowing nozzle.

[0026]

As described above, the present invention has the following effects. (1) Since the squeezing mechanism and the humidifying water suction mechanism are provided in the vicinity of the connection between the main header and the sub-header, it is possible to uniformly disperse the atomized humidified water in each sub-header. Further, since the liquid levels of the humidifying water in the main header and the sub header are lowered, the cross-sectional area of the gas flow path is increased, the diameters of the main header and the sub header can be reduced, and the apparatus becomes compact. (2) Insert a substantially inverted T-shaped sub-header into the main header, and if this insertion part is to be provided with cuts such as slits or notches, small holes, diagonally cut parts, or narrow grooves, each sub-header The humidified water in the form of a spray can be uniformly dispersed therein. Further, since the liquid level of the humidifying water in the main header and the sub header is lowered, the cross-sectional area of the gas flow path is increased, and the diameter of the main header and the sub header can be reduced. (3) Since the humidifying water is sprayed and dispersed uniformly in each subheader, the sprayed humidifying water can be uniformly dispersed also in each blowing nozzle attached to the subheader. Thus, the cleaning effect on the inner surface of the blowing nozzle is enhanced, and the precipitation of the slurry component at the tip of the blowing nozzle can be prevented. Also, a small amount of humidified water can be uniformly dispersed without spraying water into the blown gas or dispersing water in the gas. (4) A small amount of humidifying water can be uniformly dispersed in a large number of attached subheaders, and water can be evenly dispersed in a subheader provided downstream of the gas flow in the main header. (5) A structure for finely adjusting the insertion portion of the nozzle is not required, and there is no need to generate steam and mix the gas with the gas for uniform humidification. Since only parts, small holes, diagonally cut parts, narrow grooves and the like need to be provided, the shape of the apparatus is simple, and the apparatus is inexpensive because it does not require energy for generating steam. (6) In the case where a thin groove is provided in the insertion portion of the sub-header, in addition to the above effects, since water is sucked up by a capillary phenomenon, the influence of the liquid level is further reduced, and uniform dispersion of water is achieved. be able to. (7) Since the precipitation of the slurry component at the tip of the blowing nozzle is prevented, the pressure loss is small and the air bubbles are well dispersed, which contributes to the improvement of the performance of the oxidizing step of the flue gas desulfurization equipment by the lime-gypsum method. (8) When a venturi or an orifice is used as the shape of the aperture mechanism, it can be easily attached to existing equipment.

[Brief description of the drawings]

FIG. 1 is a schematic sectional configuration diagram showing a bubble dispersing device according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged cross-sectional view showing a positional relationship between a throttle mechanism and a humidifying water suction mechanism in FIG.

FIG. 3 is an enlarged sectional view showing an example of a squeezing mechanism and a humidifying water suction mechanism in the bubble dispersion device according to the first embodiment of the present invention.

FIG. 4 is an enlarged cross-sectional view showing another example of a squeezing mechanism and a humidifying water suction mechanism in the bubble dispersing device according to the first embodiment of the present invention.

FIG. 5 is an enlarged cross-sectional view showing another example of the squeezing mechanism and the humidifying water suction mechanism in the bubble dispersing device according to the first embodiment of the present invention.

FIG. 6 is a cross-sectional view showing another example of a squeezing mechanism and a humidifying water suction mechanism in the bubble dispersing device according to the first embodiment of the present invention.

FIG. 7 is a cross-sectional view showing still another example of a squeezing mechanism and a humidifying water suction mechanism in the bubble dispersing device according to the first embodiment of the present invention.

FIG. 8 is a schematic sectional configuration diagram showing a bubble dispersing device according to a second embodiment of the present invention.

FIG. 9 is an enlarged perspective view showing an example of an insertion portion and a cut portion in the bubble dispersion device according to the second embodiment of the present invention.

FIG. 10 is an enlarged perspective view showing another example of the insertion section and the cut section in the bubble dispersion device according to the second embodiment of the present invention.

FIG. 11 is an enlarged perspective view showing another example of the insertion section and the cut section in the bubble dispersion device according to the second embodiment of the present invention.

FIG. 12 is an enlarged perspective view showing another example of the insertion section and the cut section in the bubble dispersion device according to the second embodiment of the present invention.

FIG. 13 is an enlarged perspective view showing another example of the insertion section and the cut section in the bubble dispersion device according to the second embodiment of the present invention.

FIG. 14 is a partially enlarged perspective view showing details around a slit and a narrow groove in FIG. 13;

FIG. 15 is an enlarged perspective view showing another example of the insertion section and the cut section in the bubble dispersion device according to the second embodiment of the present invention.

FIG. 16 is an enlarged perspective view showing an example of an insertion portion and a small hole in a bubble dispersion device according to a third embodiment of the present invention.

FIG. 17 is an enlarged perspective view showing another example of the insertion portion and the small hole in the bubble dispersion device according to the third embodiment of the present invention.

FIG. 18 is an enlarged perspective view showing an example of an insertion portion and an oblique cut portion in a bubble dispersion device according to a fourth embodiment of the present invention.

FIG. 19 is an enlarged perspective view showing another example of the insertion portion and the oblique cut portion in the bubble dispersing device according to the fourth embodiment of the present invention.

FIG. 20 is an enlarged perspective view showing an example of an insertion portion and a narrow groove in a bubble dispersing device according to a fifth embodiment of the present invention.

FIG. 21 is a perspective view schematically showing a conventional bubble dispersion device.

FIG. 22 is a schematic sectional view showing an example of a conventional bubble dispersing device.

[Explanation of symbols]

 10, 20 Main header 12, 22 Blow nozzle 14, 24, 46 Sub header 16, 30, 58 Humidification water 18 Insertion part of blow nozzle 26 Throttle mechanism 28 Humidification water suction mechanism 32 Venturi type throttle 34 Orifice type throttle 36 Reducer type Restrictor 38 Humidified water suction tube 40, 42, 48 Flange 44 Humidified water jetting hole 50, 54 Insertion section 52 Sub-header 56 of substantially inverted T-shape 56 Cut section 60 Slit 62 Notch 64 Main header inner surface 66, 72 Narrow groove 68 Small hole 70 Oblique cut

Claims (10)

[Claims] 1. A bubble dispersing apparatus in which a plurality of subheaders each having a plurality of blowing nozzles attached to a substantially horizontal main header are connected in a substantially horizontal direction. And a squeezing mechanism and a humidifying water suction mechanism. 2. The throttle mechanism is any one of an orifice, a venturi, and a reducer, and the humidifying water suction mechanism has one end located in humidified water in the main header and the other end located near the throttle mechanism in the sub header. The bubble dispersing device according to claim 1, wherein the device is a humidifying water suction tube. 3. Under a substantially horizontal main header,
A bubble dispersing device in which a plurality of substantially inverted T-shaped subheaders to which a plurality of blowing nozzles are attached are connected in a substantially horizontal direction and in a substantially vertical direction. A bubble dispersing device, wherein a connection portion is inserted into a main header to form an insertion portion projecting into the main header, and a cut portion is provided in the insertion portion. 4. Under the substantially horizontal main header,
A bubble dispersing device in which a plurality of substantially inverted T-shaped subheaders to which a plurality of blowing nozzles are attached are connected in a substantially horizontal direction and in a substantially vertical direction. A bubble dispersing device, wherein a connecting portion is inserted into a main header to form an insertion portion projecting into the main header, and the insertion portion is provided with a small hole. 5. Under the substantially horizontal main header,
A bubble dispersing device in which a plurality of substantially inverted T-shaped subheaders to which a plurality of blowing nozzles are attached are connected in a substantially horizontal direction and in a substantially vertical direction. A bubble dispersing device, wherein a connection portion is inserted into a main header to form an insertion portion projecting into the main header, and the tip of the insertion portion forms an oblique cut portion. 6. Under the substantially horizontal main header,
A bubble dispersing device in which a plurality of substantially inverted T-shaped subheaders to which a plurality of blowing nozzles are attached are connected in a substantially horizontal direction and in a substantially vertical direction. The connection portion is inserted into the main header to form an insertion portion projecting into the main header, and at least one narrow groove is provided on the outer surface of the insertion portion in a substantially vertical direction. A bubble dispersion device characterized by the above-mentioned. 7. The at least one narrow groove extending from the inner surface of the main header to the lower end of the cut portion is provided on the outer surface of the insertion portion of the substantially inverted T-shaped sub-header. Bubble dispersion device. 8. The bubble dispersion device according to claim 4, wherein at least one narrow groove extending from the inner surface of the main header to the small hole is provided on the outer surface of the insertion portion of the substantially inverted T-shaped sub-header. . 9. An at least one narrow groove extending from an inner surface of the main header to a substantially lowermost position of the oblique cut portion is provided on an outer surface of the insertion portion of the substantially inverted T-shaped sub-header. 6. The bubble dispersion device according to 5. 10. The front end of the insertion portion of the substantially inverted T-shaped sub-header is cut substantially horizontally, and the outer surface of the insertion portion extends from the inner surface of the main header to the front end of the insertion portion. The bubble dispersion device according to claim 6, wherein at least one narrow groove is provided.