JP2002119827A - Flue gas desulfurizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flue gas desulfurizer which is further improved in a desulfurization effect. SOLUTION: Plural absorbing water spraying means 3 are alternately arranged one above the other. As a result, the spacings between the adjacent absorbing water spraying means 3 may be increased without decreasing the number of the absorbing water spraying means 3 and therefore the channeling of the waste gas 7 generated between the absorbing water spraying means 3 may be lessened and the deodorization effect is correspondingly improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, sulfur oxides (hereinafter referred to as exhaust gas) generated when fossil fuels are burned in a thermal power plant or the like. The present invention relates to a flue gas desulfurization device for absorbing and discharging SOx).

[0002]

2. Description of the Related Art A flue gas desulfurization apparatus of this type is generally provided with a horizontal exhaust gas passage and an absorption tower which are connected to each other and arranged orthogonally to each other, and a plurality of exhaust gas desulfurization apparatuses arranged in the absorption tower. Water spraying means.

[0003] The operation of the flue gas desulfurization device will be described below. That is, the exhaust gas is introduced into the absorption tower from the horizontal exhaust gas passage. On the other hand, absorbed water, which is water containing limestone, is converted into mist by the absorbed water spraying means. By the gas-liquid contact between the exhaust gas introduced into the absorption tower and the mist-absorbed water in the absorption tower, mainly sulfur oxides in the exhaust gas are absorbed by the absorbed water. As described above, the exhaust gas in which the sulfur oxide has been absorbed is discharged from the absorption tower as a clean gas.

[0004]

However, in the flue gas desulfurization apparatus, the horizontal exhaust gas passage and the absorption tower are arranged so as to be orthogonal to each other due to the layout limitation of the thermal power generation facility. For this reason, when the exhaust gas is introduced into the absorption tower from the horizontal exhaust gas passage, the flow direction of the exhaust gas changes to 90 °. At this time, a drift occurs in the flow of the exhaust gas. That is, an accelerated flow is formed at an out corner at a portion where the horizontal exhaust gas passage and the absorption tower are connected, while a backflow region is formed at an in corner.

[0005] The higher the flow rate of the exhaust gas, the greater the drift. Then, the gas-liquid contact between the exhaust gas and the mist-absorbed water decreases, and the absorption efficiency of sulfur oxide in the exhaust gas (hereinafter, simply referred to as desulfurization effect) decreases.

[0006] When an accelerated flow is formed, blow-through of mist-formed absorbed water occurs, and the desulfurization effect is extremely reduced.

Further, when a drift occurs on the near side (upstream side) of the absorbed water spray means, the drift is promoted by the ejector action of the absorbed water spray means. For this reason, the distribution of the exhaust gas flow before the absorption water spraying means greatly affects the desulfurization effect. In the ejector action, the speed of the exhaust gas is the square of the speed of jetting the absorbed water from the absorbing water spraying means.

Therefore, the exhaust gas introduced into the absorption tower from the horizontal exhaust gas passage is rectified to suppress the occurrence of drift, and as a result,
A flue gas desulfurization unit with improved desulfurization effect has been developed. As this type of flue gas desulfurization apparatus, for example, Japanese Patent Application Laid-Open No. 9-22 / 1990
No. 5256, JP-A-10-15612
No. 9 publication.

An object of the present invention is to improve the above-mentioned flue gas desulfurization apparatus and to provide a flue gas desulfurization apparatus having a further improved desulfurization effect.

[0010]

In order to achieve the above object, the invention according to claim 1 is characterized in that a plurality of absorption water spraying means are arranged alternately up and down.

As a result, according to the first aspect of the present invention, the distance between adjacent absorbed water spray means can be increased without reducing the number of absorbed water spray means. This can reduce the drift of the flue gas, which improves the desulfurization effect.

According to a second aspect of the present invention, the interval in the height direction of the plurality of absorbent spraying means arranged alternately in the vertical direction is from about 1000 mm to a distance allowed by the height of the absorption tower. It is characterized by.

As a result, according to the second aspect of the present invention, the drift generated between the adjacent absorbed water spray means can be suppressed to an allowable range, and the desulfurization effect is further improved.

[0014] The invention according to claim 3 is characterized in that a plurality of straightening plates are vertically arranged below the plurality of absorbed water spraying means.

As a result, according to the third aspect of the present invention, a plurality of flow paths for exhaust gas are formed by the rectifying action of the plurality of rectifying plates, the imbalance of the flow of exhaust gas is reduced, and the generation of drift of exhaust gas is generated. And the desulfurization effect is improved accordingly.

The invention according to claim 4 is characterized in that a rectifying round bar is fixed to upper ends of a plurality of rectifying plates.

As a result, according to the present invention, the rectifying action of the plurality of rectifying round bars is added to the rectifying action of the plurality of rectifying plates, and the rectifying action has a synergistic effect to reduce the drift of the exhaust gas. Generation can be suppressed more efficiently, and the desulfurization effect is improved accordingly.

Further, the invention according to claim 5 is characterized in that the plurality of absorption water spray means are arranged at substantially the same level as the horizontal exhaust gas passage.

As a result, the invention according to claim 5 is characterized in that the flow rate of the exhaust gas introduced into the absorption tower from the horizontal exhaust gas passage is controlled by the resistance of the plurality of absorption water spraying means arranged at substantially the same level as the horizontal exhaust gas passage. , And the drift of the exhaust gas can be suppressed accordingly, and the desulfurization effect is improved.

According to a sixth aspect of the present invention, there is provided a fuel cell system comprising: a plurality of nozzles for injecting the absorbed water upward in a water column shape; and the nozzle and the water column-shaped absorbed water are respectively covered from outside. It is characterized by being constituted by a plurality of pipes which do not hinder the injection of the water column-shaped absorbed water.

As a result, according to the present invention, the jetting speed of the absorbing water jetted from the pipe is lower than the jetting speed of the absorbing water jetted from the nozzle, and the absorbed water is jetted from the pipe accordingly. Since the flow rate of the exhaust gas due to the ejector action that occurs during the process is also reduced, the drift of the exhaust gas can be suppressed, and the desulfurization effect is improved.

The invention according to claim 7 is characterized in that the upper openings of the plurality of pipes through which the absorbed water is injected are constant in height.

As a result, in the invention according to claim 7, since the ejector action generated when the absorbed water is jetted from the upper opening of the pipe acts uniformly at the same height,
To that extent, drifting of the exhaust gas can be suppressed, and the desulfurization effect is further improved.

The invention according to claim 8 is characterized in that an exhaust gas bypass path is provided at an in-corner where a horizontal exhaust gas path and the absorption tower are connected.

As a result, in the invention according to claim 8, a negative pressure is generated on the in-corner side of the absorption tower by an ejector action generated when the absorbed water is injected from the in-corner-side absorbed water spray means, The flow of the exhaust gas from the bypass passage is induced, and the backflow region formed at the inside corner disappears, so that the drift of the exhaust gas can be suppressed and the desulfurization effect is improved.

According to a ninth aspect of the present invention, the plurality of absorption water spraying means are arranged at substantially the same level as the horizontal exhaust gas passage, and are inclined downwardly from the exhaust gas introduction side to the opposite side. The current plate is fixed to the lower end of each of the plurality of water spraying means.

As a result, according to the ninth aspect of the present invention, the flow rate of the exhaust gas introduced into the absorption tower from the horizontal exhaust gas passage is controlled by the resistance of the plurality of absorption water spraying means arranged at substantially the same level as the horizontal exhaust gas passage. Is reduced. In addition, the flow of the exhaust gas introduced from the horizontal exhaust gas passage into the absorption tower is rectified by the rectifying action of the plurality of absorption water spraying means that are arranged to be inclined downward from the exhaust gas introduction side to the opposite side. Further, the flow of the exhaust gas introduced into the absorption tower from the horizontal exhaust gas passage is rectified by the rectifying action of the rectifying plates fixed to the lower ends of the plurality of absorption water spraying means. To that extent, drifting of the exhaust gas can be suppressed, and the desulfurization effect is improved.

According to a tenth aspect of the present invention, in the horizontal exhaust gas passage, a plurality of straightening plates are arranged at an inclining portion from the horizontal gas passage to the absorption tower at an introduction portion to the absorption tower. Features.

[0029] As a result, the invention according to claim 10 is directed to the flow of the exhaust gas introduced into the absorption tower from the horizontal exhaust gas path by the rectifying action of a plurality of rectifying plates inclined upward from the horizontal gas passage to the absorption tower. Since the direction changes smoothly, the drift of the exhaust gas can be suppressed, and the desulfurization effect is improved as compared with the case where the direction changes to 90 °.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Seven embodiments of a flue gas desulfurization apparatus according to the present invention will be described below with reference to the accompanying drawings. Note that the flue gas desulfurization device is not limited by this embodiment.

(First Embodiment) FIGS. 1 to 4 show a first embodiment of a flue gas desulfurization apparatus according to the present invention. In the figure, 1 and 2 are a horizontal exhaust gas passage and an absorption tower which are connected to each other and arranged to be orthogonal to each other. In the absorption tower 2, a plurality of absorption water spraying means 3 are provided.
Is arranged.

The above-mentioned absorption water spray means 3 is shown in FIGS.
As shown in FIG. 1, the spray pipe 4 includes a plurality of nozzles 5 provided at substantially equal intervals in the spray pipe 4.

The plurality of spray pipes 4 are arranged substantially parallel to a direction substantially perpendicular to the flow direction of the exhaust gas 7 in the horizontal exhaust gas passage 1. The plurality of spray pipes 4 are branch pipes connected in a branched manner to an absorption water supply means (not shown). Absorbed water 6 is supplied to the plurality of spray pipes 4 from the absorbed water supply means (see solid arrows in FIG. 3).

The nozzle 5 jets the absorbed water 6 upward in a water column shape. At the head of this water column, the absorbed water 6 spreads around and is turned into mist. The mist-formed absorption water 6 absorbs sulfur oxides in the exhaust gas 7 and accumulates in an absorption water reservoir 8 provided at a lower portion of the absorption tower 2. The absorption water 6 stored in the absorption water reservoir 8 is injected again from the nozzle 5 by a pump (not shown) or the like.

The plurality of absorbed water spraying means 3 are alternately arranged vertically. The interval h in the height direction between the adjacent absorbed water spraying means 3 is set to about 1000 mm to a distance allowed by the height of the absorption tower 2. The horizontal interval w between the adjacent absorbed water spray means 3 is about 300 mm.

The flue gas desulfurization apparatus according to the first embodiment has the above-described configuration, and its operation will be described below.

The exhaust gas 7 introduced into the absorption tower 2 from the horizontal exhaust gas passage 1 and the absorption water 6 mist-formed by the absorption water spray means 3 come into gas-liquid contact in the absorption tower 2. Then, sulfur oxides (not shown) in the exhaust gas 7 are absorbed by the absorbed water 6. As described above, the exhaust gas 7 in which the sulfur oxide has been absorbed is discharged from the absorption tower 2 as a clean gas.

In the flue gas desulfurization apparatus according to the first embodiment, the plurality of absorption water spraying means 3 are arranged alternately up and down, so that they are adjacent to each other without reducing the number of absorption water spraying means 3. The interval between the absorbed water spraying means 3 can be increased. As a result, the drift of the exhaust gas 7 generated between the absorption water spraying means 3 can be reduced, and the desulfurization effect is improved accordingly.

In particular, in the flue gas desulfurization apparatus according to the first embodiment, the interval h in the height direction of the plurality of absorption water spraying means 3 arranged alternately up and down is allowed depending on the height of the absorption tower 2 from about 1000 mm. Up to the distance. As a result,
As shown in FIG. 4, the drift generated between the adjacent water spraying means 3 can be suppressed to an allowable range, and the desulfurization effect is further improved.

FIG. 4 is a graph showing the relative relationship between the degree of drift on the vertical axis and the interval in the height direction of the spray pipe on the horizontal axis.
As is apparent from FIG. 4, the smaller the interval h in the height direction of the spray pipe, the greater the degree of drift. Further, when the degree of drift is about 0.3 or less, it is an allowable range that does not hinder the desulfurization effect (the shaded area in FIG. 4). And the interval h in the height direction of the spray pipe is about 10
If it is not less than 00 mm, the degree of drift will be about 0.3 or less.

(Embodiment 2) FIG. 5 is an explanatory view showing Embodiment 2 of a flue gas desulfurization apparatus according to the present invention. In the figure, the same reference numerals as those in FIGS. In the figure, reference numeral 9 denotes a plurality of flow straightening plates vertically arranged below the plurality of absorbed water spraying means 3.

The plurality of, in this example, four rectifying plates 9
Are arranged in parallel at substantially equal intervals in a direction substantially perpendicular to the flow direction of the exhaust gas 7 in the horizontal exhaust gas passage 1. The four flow straightening plates 9 are arranged stepwise from top to bottom from the introduction side of the exhaust gas 7 (the horizontal exhaust gas passage 1 side) to the opposite side. The number of the flow straightening plates 9 is preferably four or more.

In the flue gas desulfurization apparatus according to the second embodiment, the flow of five exhaust gases 7 is formed in the absorption tower 2 by the rectifying action of the four rectifying plates 9 and the flow of the exhaust gas 7 is unbalanced. And the occurrence of drift of the exhaust gas 7 can be suppressed, and the desulfurization effect is improved accordingly.

Further, in the flue gas desulfurization apparatus according to the second embodiment, since the four flow straightening plates 9 are arranged at substantially equal intervals, the flow path of the exhaust gas 7 in the absorption tower 2 is equally divided. In addition, the unbalance of the flow of the exhaust gas 7 is further reduced, and the occurrence of the drift of the exhaust gas 7 can be suppressed, and the desulfurization effect is further improved accordingly.

Further, in the flue gas desulfurization apparatus according to the second embodiment, the four straightening plates 9 are vertically arranged, so that the water 6 is always dropped in the absorption tower 2 even though the absorption water 6 always falls. No risk of fire and puddles.

(Modification of Second Embodiment) FIG. 6 is an explanatory view showing a modification of the second embodiment of the flue gas desulfurization apparatus according to the present invention. In the figure, the same reference numerals as those in FIGS. In this modification, rectifying round bars 10 are fixed to the upper ends of the four rectifying plates 9 respectively.

One straightening round bar 10 is fixed to one straightening plate 9. The straightening round bar 10 is
Similarly to the flow straightening plate 9, the exhaust gas 7 in the horizontal exhaust gas passage 1
Are arranged in a direction substantially perpendicular to the flow direction of the air. Further, the straightening round bar 10 is located downstream of the straightening plate 9 with respect to the flow of the exhaust gas 7.

In the flue gas desulfurization apparatus according to the modification of the second embodiment, the rectifying action of the four rectifying plates 9 is added to the rectifying action of the four rectifying round bars 10, and a synergistic effect of the rectifying action is provided. Thereby, the occurrence of drift of the exhaust gas 7 can be more efficiently suppressed, and the desulfurization effect is improved accordingly.

In the flue gas desulfurization apparatus according to the modification of the second embodiment, the flow rate of the exhaust gas 7 rectified by the rectifying action of the rectifying plate 9 is reduced by the resistance action of the rectifying round bar 10. As a result, the occurrence of drift of the exhaust gas 7 can be suppressed more efficiently, and the desulfurization effect is improved accordingly.

(Embodiment 3) FIG. 7 is an explanatory view showing Embodiment 3 of a flue gas desulfurization apparatus according to the present invention. In the figure, the same reference numerals as those in FIGS. In the flue gas desulfurization apparatus according to the third embodiment, a plurality of absorption water spray means 3 are arranged at substantially the same level as the horizontal exhaust gas passage 1.

The flue gas desulfurization apparatus according to the third embodiment is introduced into the absorption tower 2 from the horizontal exhaust gas passage 1 by the resistance of the plurality of absorption water spraying means 3 arranged at substantially the same level as the horizontal exhaust gas passage 1. The flow velocity of the exhaust gas 7 thus reduced is reduced, and the drift of the exhaust gas 7 can be suppressed accordingly, and the desulfurization effect is improved.

(Embodiment 4) FIGS. 8 and 9 show a flue gas desulfurization apparatus according to Embodiment 4 of the present invention. In the drawings, the same reference numerals as those in FIGS. 1 to 7 denote the same components. In the flue gas desulfurization apparatus according to the fourth embodiment, a plurality of nozzles 5 and a water column-shaped absorption water 6 are respectively covered by pipes 11 from the outside. The inside diameter and the height of the pipe 11 are set to such an extent that they do not hinder the injection of the water column-shaped absorption water 6.

The height of the upper openings 12 of the plurality of pipes 11 is made constant (see dashed lines in FIG. 8). The upper opening 12 of the pipe 11 is where the absorbed water 6 is injected.

In the flue gas desulfurization apparatus according to the fourth embodiment, since the pipe 11 is provided on the nozzle 5, the injection speed of the absorption water 6 injected from the upper opening 12 of the pipe 11 is The injection speed of the absorbed water 6 to be injected is reduced. As a result, the flow rate of the exhaust gas 7 due to the ejector action generated when the absorbed water 6 is injected from the upper opening 12 of the pipe 11 is also reduced.
The drift of the exhaust gas 7 can be suppressed, and the desulfurization effect is improved.

Further, in the flue gas desulfurization apparatus according to the fourth embodiment, since the height of the upper opening 12 of the pipe 11 is made constant, the absorption water 6 is injected from the upper opening 12 of the pipe 11. The ejector action occurring at the same height acts uniformly at the same height. As a result, drift of the exhaust gas can be suppressed, and the desulfurization effect is further improved.

(Fifth Embodiment) FIG. 10 shows a fifth embodiment of a flue gas desulfurization apparatus according to the present invention. In the figures, FIGS.
The same reference numerals as those in FIG. 9 denote the same components. In the flue gas desulfurization apparatus according to the fifth embodiment, a bypass 13 for the exhaust gas 7 is provided at an inner corner of a portion where the horizontal exhaust gas passage 1 and the absorption tower 2 are connected.

In the flue gas desulfurization apparatus according to the fifth embodiment, the bypass 13 is provided at the in-corner.
A negative pressure is generated on the in-corner side of the absorption tower 2 by an ejector action generated when the water is injected. For this reason, the exhaust gas 14 from the bypass 13 is
Is induced, and the backflow region formed at the inside corner disappears. As a result, the drift of the exhaust gas 7 can be suppressed, and the desulfurization effect is improved.

(Embodiment 6) FIG. 11 shows a flue gas desulfurization apparatus according to Embodiment 6 of the present invention. In the figures, FIGS.
The same reference numerals as those in FIG. 10 denote the same components. Embodiment 6
In the flue gas desulfurization device, the plurality of absorption water spraying means 3 are arranged at substantially the same level as the horizontal exhaust gas passage, and are arranged so as to be inclined downward from the introduction side of the exhaust gas 7 to the opposite side. . At the lower ends of the plurality of absorbed water spraying means 3, the flow straightening plates 15 are respectively fixed by hanging.

One straightening plate 15 is fixed to one absorbed water spraying means 3. In addition, the current plate 15
Are arranged in a direction substantially perpendicular to the flow direction of the exhaust gas 7 in the horizontal exhaust gas passage 1.

First, the flue gas desulfurization apparatus according to the sixth embodiment uses the rectifying action of the rectifying plates 15 fixed to the lower ends of the plurality of absorbed water spraying means 3, respectively.
, The flow of the exhaust gas 7 introduced into the absorption tower 2 is rectified.

Next, in the flue gas desulfurization apparatus according to the sixth embodiment, the flow is rectified by the rectifying plate 15 by the resistance of the plurality of absorption water spraying means 3 arranged at substantially the same level as the horizontal exhaust gas passage 1. The flow velocity of the exhaust gas 7 is reduced.

In the flue gas desulfurization apparatus according to the sixth embodiment, the rectifying plate is formed by the rectifying action of the plurality of absorption water spraying means 3 which are arranged in a downward slope from the introduction side of the exhaust gas 7 to the opposite side. 15 and the flow of the exhaust gas 7 decelerated by the absorption water spraying means 3 is rectified.

As a result, due to the synergistic effect of the resistance action of the plurality of absorption water spray means 3, the rectification action of the plurality of absorption water spray means 3, and the rectification action of the rectification plate 15, the drift of exhaust gas is suppressed. And the desulfurization effect is improved.

(Seventh Embodiment) FIG. 12 shows a flue gas desulfurization apparatus according to a seventh embodiment of the present invention. In the figures, FIGS.
11 denote the same components. Embodiment 7
In the flue gas desulfurization device in the above, a plurality of, in this example, four flow straightening plates 16 are inclined upwardly from the horizontal gas passage 1 to the absorption tower 2 in a portion of the horizontal exhaust gas passage 1 which is introduced into the absorption tower 2. Are located. The current plate 16 is arranged in a direction substantially perpendicular to the flow direction of the exhaust gas 7 in the horizontal exhaust gas passage 1.

In the flue gas desulfurization apparatus according to the seventh embodiment, the rectifying action of the four rectifying plates 16 sloping upward from the horizontal gas passage 1 to the absorption tower 2 causes the gas to be transferred from the horizontal exhaust gas passage 1 to the absorption tower 2. The flow direction of the introduced exhaust gas 7 changes smoothly. As a result, the drift of the exhaust gas 7 can be suppressed and the desulfurization effect can be improved as compared with the case where the angle is changed to 90 °.

The above-mentioned absorption water spraying means 3, flow straightening plates 9, 15,
16. The rectifying round bar 10 has a rectifying action for the exhaust gas 7 and a deceleration action for the exhaust gas 7, respectively.

Further, the absorption water spraying means 3, the rectifying plate 9,
15, 16 and the straightening round bar 10 are each one,
It may be a book, a plurality of pieces, or a plurality of pieces may be joined.

The above-mentioned absorption water spraying means 3, flow straightening plates 9, 15,
16, the straightening round bar 10 is a horizontal exhaust gas passage 1,
It may be arranged over the whole in the width direction of the absorption tower 2 (direction perpendicular to the flow of the exhaust gas 7), may be partially arranged, or may be divided and arranged.

The spray pipe 4 of the absorption water spraying means 3
Are arranged in the direction perpendicular to the flow of the exhaust gas 7, but may be arranged in the direction of the flow of the exhaust gas 7.

[0070]

As is apparent from the above description, according to the flue gas desulfurization apparatus according to the present invention (claim 1), a plurality of absorption water spraying means are arranged alternately up and down. Without reducing the number of water spray means, the distance between adjacent absorbed water spray means can be increased. As a result, it is possible to reduce the drift of the exhaust gas generated between the absorption water spraying means, and accordingly, the desulfurization effect is improved.

Further, according to the flue gas desulfurization apparatus of the present invention (claim 2), the interval in the height direction of the plurality of absorption water spraying means which are alternately arranged vertically is about 1000 mm from the height of the absorption tower. Therefore, the drift generated between the adjacent water spraying means can be suppressed to an allowable range. As a result, the drift of the exhaust gas generated between the absorption water spraying means can be further reduced, and the desulfurization effect is further improved accordingly.

Further, according to the flue gas desulfurization apparatus of the present invention (claim 3), since a plurality of straightening plates are vertically arranged below a plurality of absorption water spray means, a plurality of straightening plates are provided. Due to the rectifying action of the rectifier plate, a plurality of exhaust gas flow paths are formed, and the unbalance of the exhaust gas flow is reduced. As a result, generation of drift of the exhaust gas can be suppressed, and the desulfurization effect is improved accordingly.

According to the flue gas desulfurization device of the present invention (claim 4), since the straightening round bar is fixed to the upper end of the plural straightening plates, the straightening of the plural straightening plates is achieved. A rectifying action of a plurality of rectifying round bars is added to the action. As a result, due to the synergistic effect of the rectifying action, the generation of the drift of the exhaust gas can be more efficiently suppressed, and the desulfurization effect is improved accordingly.

Further, according to the flue gas desulfurization apparatus according to the present invention (claim 5), since the plurality of absorption water spray means are arranged at substantially the same level as the horizontal exhaust gas passage, the horizontal exhaust gas The flow rate of the exhaust gas introduced into the absorption tower from the horizontal exhaust gas passage is reduced by the resistance of the plurality of water spraying means arranged at substantially the same level as the passage. As a result, the drift of the exhaust gas can be suppressed, and the desulfurization effect is improved.

Further, according to the flue gas desulfurization apparatus of the present invention (claim 6), a plurality of nozzles for injecting the absorbed water upward in a water column shape by the absorbent spraying means, the nozzle and the water column shape are provided. It is composed of a plurality of pipes that respectively cover the absorbed water from the outside and do not hinder the injection of the water-column-shaped absorbed water, so that the injection speed of the absorbed water injected from the pipe is injected from the nozzle. The injection speed of the absorbed water. As a result, the flow velocity of the exhaust gas due to the ejector action generated when the absorbed water is injected from the pipe is also reduced, so that the drift of the exhaust gas can be suppressed and the desulfurization effect is improved.

Further, according to the flue gas desulfurization apparatus of the present invention (claim 7), the upper openings of the plurality of pipes through which the absorbed water is injected have a constant height. Therefore, the ejector action generated when the absorbed water is injected from the upper opening of the pipe acts uniformly at the same height. As a result, drifting of exhaust gas can be suppressed,
The desulfurization effect is further improved.

Further, according to the flue gas desulfurization apparatus of the present invention (claim 8), the exhaust gas bypass path is provided at the in-corner where the horizontal exhaust gas path and the absorption tower are connected. Therefore, a negative pressure is generated on the in-corner side of the absorption tower by an ejector action generated when the absorbed water is injected from the in-corner-side absorbed water spraying means,
Exhaust gas flow from the bypass is induced, and the backflow region formed at the inside corner disappears. as a result,
The drift of the exhaust gas can be suppressed, and the desulfurization effect is improved.

Further, according to the flue gas desulfurization apparatus of the present invention (claim 9), the plurality of absorption water spray means are arranged at substantially the same level as the horizontal exhaust gas passage, and from the exhaust gas introduction side. Since the flow straightening plates are fixed to the lower ends of the plurality of absorbed water spraying means, respectively, they are arranged at a downward slope toward the opposite side, so that they are arranged at substantially the same level as the horizontal exhaust gas passage. Due to the resistance of the plurality of absorption water spraying means, the flow velocity of the exhaust gas introduced into the absorption tower from the horizontal exhaust gas passage is reduced. In addition, the flow of the exhaust gas introduced from the horizontal exhaust gas passage into the absorption tower is rectified by the rectifying action of the plurality of absorption water spraying means that are arranged to be inclined downward from the exhaust gas introduction side to the opposite side.
Further, the flow of the exhaust gas introduced into the absorption tower from the horizontal exhaust gas passage is rectified by the rectifying action of the rectifying plates fixed to the lower ends of the plurality of absorption water spraying means. as a result,
The drift of the exhaust gas can be suppressed, and the desulfurization effect is improved.

Further, according to the flue gas desulfurization apparatus of the present invention (claim 10), a plurality of straightening plates are provided on the part of the horizontal exhaust gas passage which is introduced into the absorption tower in an upward gradient from the horizontal gas passage to the absorption tower. Because of the inclined arrangement, the flow direction of the exhaust gas introduced into the absorption tower from the horizontal exhaust gas passage is controlled by the rectifying action of a plurality of straightening plates that are inclined upward from the horizontal gas passage to the absorption tower. Changes smoothly. As a result, the drift of the exhaust gas can be suppressed, and the desulfurization effect is improved, as compared with the case where the angle is changed to 90 °.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing Embodiment 1 of a flue gas desulfurization device of the present invention.

FIG. 2 is an enlarged view of II in FIG.

FIG. 3 is a view taken in the direction of the arrow III in FIG. 2;

FIG. 4 is a graph showing the relative relationship between the degree of drift on the vertical axis and the interval in the height direction of the spray pipe on the horizontal axis.

FIG. 5 is an explanatory view showing a second embodiment of the flue gas desulfurization apparatus of the present invention.

FIG. 6 is an explanatory diagram showing a modification of the second embodiment.

FIG. 7 is an explanatory view showing a third embodiment of the flue gas desulfurization apparatus of the present invention.

FIG. 8 is an explanatory diagram showing a fourth embodiment of the flue gas desulfurization apparatus of the present invention.

FIG. 9 is a partially enlarged sectional view.

FIG. 10 is an explanatory view showing Embodiment 5 of the flue gas desulfurization apparatus of the present invention.

FIG. 11 is an explanatory view showing a sixth embodiment of the flue gas desulfurization apparatus of the present invention.

FIG. 12 is an explanatory diagram showing a seventh embodiment of the flue gas desulfurization apparatus of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Horizontal exhaust gas passage 2 Absorption tower 3 Absorbing water spray means 4 Spray pipe 5 Nozzle 6 Absorbing water 7 Exhaust gas 8 Absorbing water reservoir 9 Rectifier plate 10 Rectifying round bar 11 Pipe 12 Upper opening 13 Bypass path 14 Exhaust gas 15 Rectifier plate 16 Rectifier plate

Continuing from the front page (72) Inventor Takeshi Oishi 2-5-1 Marunouchi, Chiyoda-ku, Tokyo Sanishi Heavy Industries Co., Ltd. (72) Inventor Tatsuto Nagayasu 5-5-1 Marunouchi, Chiyoda-ku, Tokyo Sanishi Heavy Industries Co., Ltd. (72) Inventor Satoshi Nakamura 2-5-1 Marunouchi, Chiyoda-ku, Tokyo Sanishi Heavy Industries Co., Ltd. (72) Inventor Susumu Okino 4--22 Kannonshinmachi, Nishi-ku, Hiroshima-shi Hiroshima Mitsubishi Heavy Industries, Ltd. F-term in laboratory (reference) 4D002 AA02 AC01 BA02 CA01 DA05 DA16 EA12 FA03 4D020 AA06 BA02 BA09 BB03 BB05 CB27 CB34 CC04 CC08 DA03 DB12

Claims (10)

[Claims] 1. A horizontal exhaust gas passage and an absorption tower which are connected to each other and arranged to be orthogonal to each other,
A plurality of absorption water spraying means disposed in the absorption tower, and gas-liquid contact between exhaust gas introduced into the absorption tower from the horizontal exhaust gas passage and absorption water mist formed by the absorption water spraying means. In the flue gas desulfurization device for absorbing sulfur oxides in the exhaust gas into the absorption water, the plurality of absorption water spraying means are arranged alternately up and down. 2. A height direction interval of the plurality of absorption water spraying means alternately arranged vertically is set to about 1000 mm to a distance allowed by the height of the absorption tower.
The flue gas desulfurization device according to claim 1, wherein: 3. Under the plurality of absorption water spraying means,
The flue gas desulfurization device according to claim 1 or 2, wherein a plurality of current plates are vertically arranged. 4. The flue gas desulfurization apparatus according to claim 3, wherein a straightening round bar is fixed to upper ends of the plurality of straightening plates. 5. The flue gas desulfurization apparatus according to claim 1, wherein the plurality of absorption water spraying units are arranged at substantially the same level as the horizontal exhaust gas passage. 6. The absorbing water spraying means includes: a plurality of nozzles for injecting the absorbing water upward in a water column shape; and covering the nozzles and the water column-shaped absorbing water from outside, respectively. The flue gas desulfurization apparatus according to claim 1 or 2, comprising a plurality of pipes that do not hinder water injection. 7. The smoke exhaust according to claim 6, wherein the upper openings of the plurality of pipes through which the absorbed water is injected have a constant height. Desulfurization equipment. 8. The exhaust gas bypass passage is provided at an in-corner at a portion where the horizontal exhaust gas passage and the absorption tower are connected to each other.
2. The flue gas desulfurization device according to item 1. 9. A horizontal exhaust gas passage and an absorption tower arranged so as to be orthogonal to each other, and a plurality of absorption water spraying means arranged in the absorption tower, and introduced into the absorption tower from the horizontal exhaust gas passage. A flue gas desulfurization apparatus for bringing the exhaust gas and the absorbed water mist formed by the absorbed water spray means into gas-liquid contact so as to absorb the sulfur oxides in the exhaust gas into the absorbed water; The means is disposed at a position substantially at the same level as the horizontal exhaust gas passage, and is disposed so as to be inclined downward from the introduction side of the exhaust gas to the opposite side. Is a flue gas desulfurization device, wherein each of the flow straightening plates is fixed. 10. A plurality of flow straightening plates are arranged at an introduction portion of the horizontal exhaust gas passage into the absorption tower, and are inclined in an upward gradient from the horizontal gas passage to the absorption tower. The flue gas desulfurization apparatus according to any one of claims 1 to 9.