JP2739439B2 - Wet desulfurization equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet desulfurization apparatus for simultaneously removing dust and sulfur oxides contained in exhaust gas from boilers using fossil fuels, land and marine diesel engines.

[0002]

2. Description of the Related Art Exhaust gas from boilers using fossil fuels and onshore and marine diesel engines contains a relatively large amount of dust and sulfur oxides. It has become. Therefore, various desulfurization apparatuses have been developed to solve this problem.

[0003] As a conventional wet desulfurization apparatus, for example, one described in Japanese Patent Publication No. 43-3280 is known. The apparatus comprises a separation vessel having a gas flow inlet on one side, a liquid contained in the separation vessel, a pump connected to the other side of the separation vessel, and a vicinity of the inlet. A deflector plate provided in the separation vessel for directing the air flow substantially at right angles to the liquid surface, a cylindrical chamber provided in front of and above and open inward, and the above-described substantially right-angled direction. Formed obliquely upward from the liquid level by the wall of the inclined container and the wall of the separation vessel, which form a level difference between the liquid level on the upstream side and the downstream side due to the influence of the air flow. And an airflow passage.

When a negative pressure is applied by driving a blower, the processing gas introduced from the gas flow inlet enters the liquid level stored in the separation container through a deflector plate at a substantially right angle, and the processing gas is processed. While the dust in the gas precipitates and is removed in the liquid, the gas part is swirled mainly in the cylindrical chamber and is brought into contact with the liquid to be desulfurized, and then along the upwardly inclined air passage. And the treated gas is discharged.

[0005]

By the way, in the conventional wet desulfurization apparatus, when the processing gas amount increases with the increase in the output of the boiler or the engine, the separation vessel is required to be large in length, width and height. However, if this method was adopted, depending on the degree of increase in the amount of gas to be treated, it would not be possible to install exhaust gas flue in space, and the exhaust gas duct would be routed in the direction to avoid it. .

Accordingly, when this desulfurization apparatus is installed, there is a problem that a large installation space is required in anticipation of a countermeasure when the amount of processing gas is increased in advance. Further, when the amount of the processing gas increases, the gas flow velocity passing through the gap between the lower end of the deflector and the separation container increases,
There was a problem of increasing the pressure loss.

[0007] The present invention has been made in view of the above-mentioned problems of the prior art. Even if the amount of treated gas is increased, the flue can be installed regardless of whether or not the installation around the flue is regulated. It is an object of the present invention to provide a wet desulfurization device having stable loss.

[0008]

SUMMARY OF THE INVENTION The present invention is directed to a desulfurizer vessel.
Inside is a gas inlet for the processing gas, a gas introduction chamber having a gas outlet, and injection of a desulfurization treatment liquid into the gas introduction chamber.
A vortex processing chamber provided with a substantially cylindrical vortex generator at the upper part on the upstream side and an upper inclined passage part on the downstream side, communicating with a gas outlet of the gas introduction chamber provided with a nozzle ; The vortex processing chamber communicates with the upper inclined passage portion and is partitioned into a gas discharge chamber in which a gas outlet of the processed gas is formed at an upper portion, and the desulfurizer is provided in a plurality along the flue direction of the processing gas. A wet type, in which a plurality of tables are arranged side by side, and one gas introduction part communicating with the gas inlets of all the desulfurizers is provided, and one gas discharge part communicating with the gas outlets of all the desulfurizers is provided. A desulfurization device is provided.

[0009]

In the wet desulfurization apparatus of the present invention, the processing gas is entirely
Through one gas inlet communicating with the gas inlets of all of the above desulfurizers, the gas passes through the gas inlet chamber of each container from the gas inlets of the respective desulfurizers juxtaposed along the flue direction. Is injected from the injection nozzle provided in the gas introduction chamber
The processing gas and the mist-like desulfurization processing liquid that are absorbed by contacting the desulfurization processing liquid and then blown into the vortex processing chamber from the gas outlet at the lower part of the gas introduction chamber become vortex in the vortex generation part, and the centrifugal force causes the vortex. A liquid film is formed on the surface on which the vortex flow generating section is formed, and dust in the processing gas is collected by the liquid film and stored at the bottom of the container. After that, the treated gas and some mist-like desulfurization treatment liquid,
A liquid film is also formed on the upper inclined passage portion forming surface of the vortex processing chamber to perform desulfurization and dust collection. The processed gas sent from the upper inclined passage to the gas discharge chamber collectively flows from the gas outlet formed there into one gas discharge part connected to all of the gas outlets of each desulfurizer. , Through which it is discharged outside.

When the amount of processing gas flowing through the flue increases, the number of desulfurizers juxtaposed along the flue direction can be increased, regardless of whether or not there are restrictions on the installation around the flue. In addition, the cylindrical vortex generator, which has a large effect on the pressure loss of the processing gas, does not become large even if the processing gas volume is increased as in the past. Is also stable.

Further , in the wet desulfurization apparatus of the present invention ,
As described above, the desulfurization treatment liquid is injected from the injection nozzle while the processing gas introduced into each container passes through the gas introduction chamber. At this time, by increasing or decreasing the amount of the desulfurization treatment liquid ejected from each injection nozzle for each desulfurizer, and adjusting the inflow resistance of the treatment gas just like a valve, the desulfurizer is moved along the flue direction. The occurrence of uneven flow of the processing gas distributed from the gas inlet to the respective desulfurizers due to the horizontally-arranged arrangement can be prevented, and uniform processing gas distribution can be realized.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings, but the present invention is not limited to these embodiments.

First, a first embodiment of the present invention will be described with reference to FIGS.
A wet desulfurization apparatus according to an embodiment will be described. As shown in FIGS. 1 and 2, in the wet desulfurization apparatus 10 of the first embodiment of the present invention, six desulfurizers 20 are juxtaposed along the flue direction of the processing gas. One gas inlet 22 communicating with the inlet 21 is provided, and one gas outlet 24 communicating with the gas outlets 23 of all the desulfurizers 20 is provided. The gas inlet 22 and the gas outlet 24 are in the form of an integrated box. The gas inlet 22 is provided with a gas inlet 22a connected to the upstream side of the dust. Is provided with a gas outlet 24a connected to the downstream side of the dust.

As shown in FIG. 3, the desulfurizer 20 has a container 30 which is long in the direction perpendicular to the flue direction, and the end of the container 30 on the gas inlet 21 side is partitioned by a vertical plate 31. The gas introduction chamber 33 is provided with an injection nozzle 32 for the desulfurization treatment liquid a near an intermediate portion in the height direction. As the desulfurization treatment liquid a, for example, a slurry made of a mixture of an absorbent such as limestone or slaked lime and an absorption product such as gypsum or calcium sulfite, or an absorbent and an absorption product such as magnesium oxide or magnesium sulfite. It is preferable to use a solution or slurry made of a mixture of certain magnesium sulfate and magnesium sulfite, but other alkali salt solutions can also be used.

A gas outlet 34 is formed below the gas introduction chamber 33, and a vortex processing chamber 35 is formed downstream of the gas introduction chamber 33 so as to communicate with the gas outlet 34. The eddy current processing chamber 35 is disposed at an upper portion on the upstream side, has one end fixed to an intermediate portion of the vertical plate 31, and has a substantially cylindrical eddy current generating portion 37 defined by a curved plate 36 having an open lower surface. It rises from the other end that is rolled inward of the curved plate 36, once extends to the upper end of the center of the container 30, and then descends in an arc shape to the mounting portion of the filter 38 attached near the gas outlet 23. An upper inclined passage portion 41 is provided, which is disposed on the downstream side of the upper passage plate 39 attached thereto and has a lower end defined by a lower passage plate 40 rising from the bottom of the container 30 along the upper passage plate 39. I have.

Downstream of the vortex processing chamber 35, there is disposed a gas discharge chamber 42 communicating with the upper inclined passage 41 and having the gas outlet 23 for the processed gas formed at the upper part thereof.
At the bottom of the container 30, a drain portion 43 that is gradually inclined downward from an end on the gas inlet 21 side to an end on the gas outlet 23 side is provided.
Is provided at the lowermost end of the drain portion 43, and a discharge port 45 for the waste liquid after the desulfurization treatment connected to the discharge pipe 44 is formed.

Next, the operation of the wet desulfurization apparatus 10 according to the first embodiment of the present invention will be described. As shown in FIGS. 1 and 2, when a processing gas containing sulfur oxides and dust is introduced into the wet desulfurization apparatus 10 from a gas inlet 22 a through a duct (not shown), first, one processing gas is formed. The desulfurizers 20 are arranged in a straight line along the flue direction through the introduction section 22.
From the gas inlet 21 to the gas introduction chamber 33 of each container 20, where the desulfurization treatment liquid a is injected from the injection nozzle 32 to absorb the sulfur oxides in the processed gas.

At this time, since the desulfurizers 20 are arranged horizontally long in the flue direction, one long gas introduction portion 22 is provided.
However, there is a risk that uneven flow may occur in the processing gas being distributed to the respective desulfurizers 20 and the gas may not be distributed evenly.
In such a case, the ejection amount of the desulfurization treatment liquid a from each injection nozzle 32 is increased or decreased for each desulfurizer 20.
By adjusting the inflow resistance of the processing gas just like a valve, this uniform distribution of the processing gas can be realized.

Next, at the gas outlet 34 of the gas introduction chamber 33, the processed gas and the mist-like desulfurization processing liquid a accelerated to 10 m / s or more are blown out into the vortex processing chamber 35, where the vortex generator A vortex is formed in the vortex 37, and a liquid film is formed by the centrifugal force on the inner surface of the curved plate 36 on which the vortex flow generating portion 37 is formed. Dust in the processing gas is collected by the liquid film, and the drain at the bottom of the container 20 is drained. It flows down to the part 43.

Thereafter, the treated gas and the desulfurized treatment liquid a in the form of some mist form a liquid film also on the inner surfaces of the upper and lower passage plates 39 and 40 on which the upper inclined passage portion 41 is formed. Desulfurization and dust collection. Then, the treated gas delivered through on the inclined passage 41 into the gas discharge chamber 42, such as liquid component is filtered by a filter 38 and the gas outlet 23, which communicates with all of the desulfurizer 20 one One
, And collectively flows into the gas discharge part 24 and is discharged outside through a duct. Further, the waste liquid containing the dust after the desulfurization treatment is collected by the drain part 43 and discharged from the discharge port 45 through the discharge pipe 44.

When the amount of the processing gas flowing through the flue increases, the number of desulfurizers 20 juxtaposed along the flue direction may be increased. Irrespective of this, the flue can be installed, and the cylindrical vortex generator 37, which has a large influence on the pressure loss of the processing gas, does not become large even if the processing gas volume is increased as in the prior art. The pressure loss in the device 10 can also be stabilized.

Next, a wet desulfurization apparatus 50 according to a second embodiment of the present invention will be described with reference to FIG. As shown in FIG.
The wet desulfurization apparatus 50 according to the second embodiment of the present invention includes a desulfurizer 20.
Was juxtaposed connected obliquely to the flue direction, it is one of the gas <br/> scan introducing portion 51 and one gas outlet 52 which was tapered and thickens the passage respectively. By doing so, the processing gas can be evenly distributed to each desulfurizer 20,
Further, since the volumes of the gas introduction part 51 and the gas discharge part 52 can be reduced, an effect that the apparatus becomes compact as a whole can be obtained.

Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and any change in design without departing from the scope of the present invention is included in the present invention. For example, the shapes of the gas introduction chamber, the vortex processing chamber, and the gas discharge chamber of the desulfurizer need not be limited to those in the embodiment.

The number of desulfurizers juxtaposed along the flue direction of the processing gas may be any number .

[0025]

Wet flue gas desulfurization apparatus of the present invention exhibits, thus a plurality of the desulfurizer, is arranged along the flue direction of the process gas, a gas inlet communicating with the gas inlet of all the desulfurizer And a single gas discharge unit that communicates with the gas outlets of all desulfurizers, so if the amount of treated gas flowing through the flue increases, it will be juxtaposed along the flue direction. It is only necessary to increase the number of desulfurizers to be installed, and it is possible to install the flue regardless of the installation regulations around the flue, and the cylindrical vortex generator, which has a large effect on the pressure loss of the processing gas, Since the size does not increase even if the amount of processing gas is increased as in the related art, the pressure loss in the wet desulfurization device can be stabilized.

Further, in the wet desulfurization apparatus of the present invention ,
A desulfurization treatment liquid injection nozzle is provided in the gas introduction chamber, and the amount of desulfurization treatment liquid ejected from each injection nozzle is increased or decreased for each desulfurizer to adjust the inflow resistance of the processing gas. Prevents uneven flow of processing gas distributed from one gas inlet to each desulfurizer due to the horizontal arrangement along the flue direction, realizing even distribution of processing gas it can.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a wet desulfurization apparatus according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the wet desulfurization apparatus of the first embodiment.

FIG. 3 is an enlarged sectional view of a main part of the first embodiment.

FIG. 4 is a perspective view of a wet desulfurization apparatus according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Wet desulfurization apparatus 20 Desulfurizer 21 Gas inlet 22 Gas inlet 23 Gas outlet 24 Gas outlet 30 Vessel 32 Injection nozzle 33 Gas introduction chamber 34 Gas outlet 35 Swirl processing chamber 37 Swirl generator 41 Upper inclined passage part 42 Gas discharge Chamber a Desulfurization treatment liquid

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI B01D 53/77 F23J 15/00 B F23J 15/00 (72) Inventor Taketoshi Yasune 2-1 Okawa-cho, Kawasaki-ku, Kawasaki-ku, Kawasaki-shi, Kanagawa No. Mitsubishi Koki Co., Ltd. (72) Inventor Megumi Taguchi 2-1 Okawa-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Mitsubishi Kakoki Co., Ltd. (56) References JP-A-2-99117 (JP, A) Showa 43-3280 (JP, B1)

Claims (1)

(57) [Claims] 1. A desulfurizer vessel, a gas inlet for the process gas, a gas introduction chamber gas outlet is formed, the gas
An almost cylindrical vortex generator is provided at the upper part on the upstream side, and is connected to the gas outlet of the gas introduction chamber provided with the injection nozzle for the desulfurization treatment liquid in the introduction chamber. The desulfurizer is divided into a vortex processing chamber provided with an upper inclined passage portion, and a gas discharge chamber communicated with the upper inclined passage portion of the vortex processing chamber and formed with a gas outlet for processed gas at an upper portion thereof. It was allowed to plurality Tainami set along the flue direction of the process gas, provided with a single gas inlet communicating with the gas inlet of any of the desulfurizer, communicating with the gas outlet of all the desulfurizer one
A wet desulfurization device comprising two gas discharge units.