JP5688790B2 - Desulfurization equipment - Google Patents

Description

  The present invention relates to an apparatus for removing sulfide-containing gas, for example, hydrogen sulfide, in digestion gas generated in treatment processes such as sewage, human waste, and various industrial wastewaters, and more particularly, in a desulfurization tower containing a desulfurization agent. The present invention relates to a desulfurization apparatus that allows a sulfide-containing gas to pass through and adsorbs and removes hydrogen sulfide in the sulfide-containing gas by the desulfurization agent.

  Various proposals have heretofore been made regarding devices for removing sulfide-containing gas, such as hydrogen sulfide, in digestion gas generated in treatment processes such as sewage, human waste, and various industrial wastewaters (Patent Documents 1 and 2). .

  In the case of a desulfurization apparatus that passes a sulfide-containing gas through a desulfurization tower containing a desulfurization agent and adsorbs and removes hydrogen sulfide in the sulfide-containing gas by the desulfurization agent, for example, a dry desulfurization apparatus, The flow of sulfide-containing gas in the desulfurization tower may drift, and the desulfurization agent charged in the desulfurization tower may not be used sufficiently, resulting in a decrease in the gas adsorption rate, and it may be necessary to replace and replace the entire desulfurization agent. .

  This will be described with reference to FIG.

  Since the void formed between the desulfurizing agent 12 filled in the desulfurizing tower 21 and the inner peripheral wall of the desulfurizing tower 21 is generally larger than the void formed between the desulfurizing agents 12, the desulfurizing tower 21. The flow of the gas flowing in may be unevenly distributed on the inner peripheral wall side of the desulfurization tower 1 as indicated by a symbol A in FIG. 3A, and a gas flow may be generated here.

  In this case, as shown in FIG. 3B, only the outer peripheral side portion (the portion near the inner peripheral wall of the desulfurization tower 1) 12b of the desulfurizing agent 12 uniformly packed in the desulfurization tower 21 is hydrogen sulfide gas. (The hydrogen sulfide gas is adsorbed), and the central portion 12a of the desulfurizing agent 12 remains unreacted. Since the gas flow remains unevenly distributed on the inner peripheral wall side of the desulfurization tower 1 as indicated by symbol A in FIG. 3A, the gas adsorption rate continues to decrease in this state. Therefore, although the central portion 12a of the desulfurizing agent 12 remains unreacted, the entire desulfurizing agent 12 must be replaced and replaced.

  Further, when the shape of the desulfurizing agent 12 is a pellet, it is difficult to fill the desulfurizing agent 12 in the desulfurizing tower 21 so that a uniform void is formed and maintained between the desulfurizing agents 12. A gas passage may be formed as indicated by an arrow B in 3 (a). In this case, only the desulfurization agent in the vicinity of the gas path indicated by the arrow B reacts with the hydrogen sulfide gas (adsorbs the hydrogen sulfide gas), and the desulfurization agent at other places remains unreacted. On the other hand, on the other hand, the gas flow remains unevenly distributed at the location indicated by the symbol B, so the gas adsorption rate continues to decrease. Also in this case, the entire desulfurizing agent 12 must be replaced and replaced.

  Further, the flow of the gas entering from the gas inlet 8 as indicated by the arrow 10 and discharged from the gas outlet 9 as indicated by the arrow 11 is uniform in pressure and direction. As indicated by the arrow C, the adsorption may proceed only in a specific direction, and the gas adsorption may not be performed in the other direction.

  Under such circumstances, a desulfurization apparatus that passes a sulfide-containing gas through a desulfurization tower containing a desulfurization agent and adsorbs the hydrogen sulfide in the sulfide-containing gas to the desulfurization agent to remove it, for example, a dry type In the case of this desulfurization apparatus, only about 30% of the desulfurization agent packed in the desulfurization tower is used for gas adsorption, and the replacement work and the management cost for frequent replacement of the entire desulfurization agent are increased. There was a problem.

Japanese Patent Laid-Open No. 9-262429 JP 2005-58841 A

  The present invention provides a desulfurization apparatus in which a sulfide-containing gas is passed through a desulfurization tower containing a desulfurization agent, and hydrogen sulfide in the sulfide-containing gas is adsorbed and removed by the desulfurization agent. For the purpose of proposing a desulfurization apparatus that can increase the rate at which the desulfurizing agent is used for gas adsorption, thereby reducing the number of times the desulfurizing agent is replaced without reducing the gas adsorption efficiency. Yes.

The invention according to claim 1 of the present application is
A gas inlet arranged in a direction in which the central axis extends in the position of the central axis on one side of the desulfurization tower in a cylindrical desulfurization tower containing the desulfurization agent in a desulfurization agent filling portion formed inside The desulfurization gas is introduced through a gas outlet disposed on the side of the desulfurization tower opposite to the side where the gas inlet is disposed, and the desulfurization gas is discharged. agent is passed through the sulfide-containing gas into the filling unit, in the desulfurization apparatus to adsorb the hydrogen sulfide of the sulfide-containing gas to the desulfurizing agent,
The inner peripheral wall of said desulfurization tower of the intermediate portion between the front region of the inner peripheral wall of said desulfurization tower of the gas outlet side in Kida' agent filling portion and the gas outlet and the gas inlet side of the desulfurizing agent packed portion A desulfurizing agent filled in a ring shape along the inner peripheral wall surface of the desulfurization tower in each of the side regions;
And a desulfurizing agent to be filled in the other regions before Kida' agent filling unit,
A desulfurization apparatus having different shapes of desulfurization agents ,
A region on the inner peripheral wall side of the desulfurization tower on the gas outlet side in the desulfurizing agent filling portion, and an inner peripheral wall side of the desulfurization tower in an intermediate portion between the gas inlet side and the gas outlet side in the desulfurizing agent filling portion. The shape of the desulfurizing agent filled in a ring shape along the inner peripheral wall surface of the desulfurization tower in each region is granular,
The shape of the desulfurizing agent filled in the other region in the desulfurizing agent filling part is a columnar shape,
The cylindrical desulfurization agent is a cylindrical body having a diameter of 9 to 13 mm and a longitudinal length of 0.9 to 3 times the diameter,
In the desulfurization apparatus, the granular desulfurization agent is a sphere having a diameter of 0.5 times the diameter of the cylindrical desulfurization agent .

  According to the present invention, in a desulfurization apparatus that allows a sulfide-containing gas to pass through a desulfurization tower containing a desulfurization agent and adsorbs the hydrogen sulfide in the sulfide-containing gas to the desulfurization agent to remove the desulfurization tower. The rate at which the desulfurizing agent filled in the inside is utilized for gas adsorption can be increased, and thereby the number of desulfurizing agent replacements can be reduced without reducing the gas adsorption efficiency.

It is a figure explaining the filling state of the desulfurization agent with which it fills in the desulfurization tower of the desulfurization apparatus of this invention, Comprising: (a) is sectional drawing, (b) is a top view. (A), (b) is a figure showing an example of the desulfurization agent from which a shape differs, respectively. (A) is sectional drawing explaining the state which the gas flows in the desulfurization tower of the conventional desulfurization apparatus, (b) is filled in the desulfurization tower of the conventional desulfurization apparatus after gas adsorption was performed. The top view explaining the state of the desulfurization agent which is.

  The desulfurization apparatus of the present invention allows a sulfide-containing gas to pass through a desulfurization tower 1 (FIG. 1 (a)) containing a desulfurizing agent, and adsorbs hydrogen sulfide in the sulfide-containing gas to the desulfurizing agent. Is.

  In the desulfurization apparatus of the present invention, the region 4 (FIG. 1 (a)) on the inner peripheral wall side of the desulfurization tower 1 on the gas outlet 9 side in the desulfurization agent filling section in the desulfurization tower 1 (FIG. 1 (a)), and the desulfurization agent The shape of the desulfurizing agent 3 filled in a ring shape in the region 5 (FIG. 1 (a)) on the inner peripheral wall side of the desulfurization tower 1 in the intermediate portion between the gas inlet 8 side and the gas outlet 9 side in the filling portion, The shape of the desulfurization agent 2 filled in other regions in the desulfurization agent filling portion in the desulfurization tower 1 is made different from each other.

  By doing in this way, more desulfurization than the gas which flows in the desulfurization agent currently filled in the desulfurization tower 1 from the gas inlet 8 side toward the gas outlet 9 side is carried out. The gas flow is drifted so that it is efficiently adsorbed by contact with the agent, the ratio of the desulfurization agent packed in the desulfurization tower 1 is increased for gas adsorption, and the gas adsorption efficiency is reduced. Without, it is possible to reduce the number of replacement of the desulfurization agent.

  That is, in the present invention, the degreasing agent packed in the conventional desulfurization tower employed in the conventional desulfurization apparatus is produced by the same material and the same production method as the conventional degreasing agent. It is manufactured in a shape unique to the invention, and as described above, the efficiency of adsorption of sulfide-containing gas in the desulfurization apparatus is improved by filling a specific part in the desulfurization tower with a degreasing agent having a specific shape. The desulfurization agent that is used by being filled in the desulfurization tower can be used for a longer period of time than before, that is, the life of the desulfurization agent can be extended.

  A preferred embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a view for explaining a state of filling a desulfurizing agent filled in a desulfurization tower of the desulfurization apparatus of the present invention, wherein (a) is a cross-sectional view and (b) is a plan view.

  In the desulfurization apparatus of the present invention, as shown in FIGS. 1A and 1B, the region 4 on the inner peripheral wall side of the desulfurization tower 1 on the gas outlet 9 side in the desulfurization agent filling section in the desulfurization tower 1, and the desulfurization agent The desulfurization agent 3 is filled in a ring shape in the region 5 on the inner peripheral wall side of the desulfurization tower 1 in the middle between the gas inlet 8 side and the gas outlet 9 side in the filling portion.

  Further, the desulfurizing agent 2 is filled in other regions in the desulfurizing agent filling portion in the desulfurization tower 1.

  In the embodiment shown in FIGS. 1A and 1B, the state in which the desulfurizing agents 2 and 3 are filled in the cylindrical desulfurization tower 1 having a circular cross section is described. The shape and structure are not limited to the illustrated shape and structure. For example, a desulfurization tower having a rectangular cross section (polygonal shape) such as a square cross section may be used.

  That is, in the present invention, “the desulfurizing agent 3 is filled in a ring shape” means “desulfurizing agent filling in the desulfurizing tower 1” represented by reference numeral 4 in FIG. The region of the inner peripheral wall side of the desulfurization tower 1 on the gas outlet 9 side in the section ”and“ the intermediate portion between the gas inlet 8 side and the gas outlet 9 side in the desulfurizing agent filling portion represented by reference numeral 5 in FIG. In the region on the inner peripheral wall side of the desulfurization tower 1, it means that the desulfurizing agent 3 is filled in a circumferential shape along the inner peripheral wall surface of the desulfurization tower 1.

  1 (a) and 1 (b), the gas inlet 8 is arranged in the direction in which the central axis extends at the position of the central axis of the cylindrical desulfurization tower 1, and the gas outlet 9 is a cylindrical desulfurization. Although arranged in a direction perpendicular to the central axis of the tower 1, the arrangement location, shape, structure, etc. of the gas inlet 8 and the gas outlet 9 are not limited to these. In the present invention, the degreasing agent packed in the conventional desulfurization tower employed in the conventional desulfurization apparatus is produced by the same material and the same production method as the conventional desulfurization agent. The efficiency of adsorption of sulfide-containing gas in the desulfurization equipment is improved by filling a specific location in the desulfurization tower 1 with a degreasing agent having a specific shape, and filling the desulfurization tower Thus, the desulfurization agent that is used can be used for a longer period of time than before, that is, the life of the desulfurization agent can be extended. Therefore, as the arrangement location, shape, and structure of the gas inlet 8 and the gas outlet 9 in the desulfurization tower 1, various types that are employed in conventional desulfurization apparatuses and desulfurization towers can be employed.

  In the present desulfurization apparatus, the desulfurizing agent 3 and the desulfurizing agent 2 have different shapes.

  As the desulfurizing agents 2 and 3 having different shapes, for example, those having the shapes shown in FIGS. 2A and 2B can be employed.

  That is, the region 4 on the inner peripheral wall side of the desulfurization tower 1 on the gas outlet 9 side in the desulfurization agent filling part in the desulfurization tower 1 and the desulfurization tower in the intermediate part between the gas inlet 8 side and the gas outlet 9 side in the desulfurization agent filling part The desulfurizing agent 3 filled in a ring shape in each region 5 on the inner peripheral wall side of 1 was a granular desulfurizing agent as illustrated in FIG.

  Moreover, the desulfurization agent 2 with which the other area | region in the desulfurization agent filling part in the desulfurization tower 1 is filled was made into the column shape so that it might be illustrated by Fig.2 (a).

  The columnar desulfurizing agent 2 can be formed into a columnar body having a diameter R1 of 9 to 13 mm and a longitudinal length L of 0.9 to 3 times the diameter R1.

  The granular desulfurizing agent 3 can be a sphere having a diameter R2 that is 0.5 times the diameter R1 of the cylindrical desulfurizing agent 2.

  In the present invention, the region 4 on the inner peripheral wall side of the desulfurization tower 1 on the gas outlet 9 side in the desulfurization agent filling portion in the desulfurization tower 1 and the intermediate portion between the gas inlet 8 side and the gas outlet 9 side in the desulfurization agent filling portion. In the region 5 on the inner peripheral wall side of the desulfurization tower 1, a desulfurization agent 3 filled in a ring shape and a desulfurization agent 2 filled in other regions in the desulfurization agent filling portion in the desulfurization tower 1, As described above, each has a different shape. As a result, the gas flowing from the gas inlet 8 side toward the gas outlet 9 side in the desulfurizing agent filled in the desulfurizing tower 1 comes into contact with more desulfurizing agent filled in the desulfurizing tower 1. The gas flow is caused to drift so that it can be adsorbed efficiently.

  Therefore, as described above, the desulfurizing agents 2 and 3 having different shapes are the same as the filler used in the conventional dry desulfurization apparatus, and only the shape is specified as described above. Those produced in the same manner as the above fillers can be used.

  The above-described filling of the desulfurizing agents 2 and 3 into the desulfurization tower 1 can be performed, for example, as follows.

  First, a desulfurizing agent 2 in an amount corresponding to about half the capacity of the desulfurizing tower 1 is charged into the desulfurizing tower 1 in the same manner as before. Thereafter, a region portion on the inner peripheral wall side of the desulfurization tower 1 on the upper surface side of the desulfurization agent 2 filled up to about half of the desulfurization tower 1 is brought close to the center side of the desulfurization tower 1, and a ring shape indicated by reference numeral 5 in FIG. The region is formed. Then, the desulfurizing agent 3 is charged into the formed ring-shaped region 5. Subsequently, a desulfurizing agent 2 in an amount corresponding to about half the capacity of the desulfurization tower 1 is charged into the desulfurization tower 1. Thereafter, the region on the inner peripheral wall side of the desulfurization tower 1 on the upper surface side of the desulfurization agent 2 filled in the desulfurization tower 1 is brought closer to the center side of the desulfurization tower 1 to form a ring-shaped region indicated by reference numeral 4 in FIG. . Then, the desulfurizing agent 3 is charged into the formed ring-shaped region 4.

  When the effectiveness of the desulfurization apparatus of the present invention was verified, it was as follows.

  In the case of the conventional desulfurization apparatus (FIG. 3) in which the conventional desulfurization tower 21 in which only the pellet-shaped desulfurization agent 12 that has been used conventionally is packed is employed, the figure is shown when 52 days have passed since the start of verification. In the region on the inner peripheral wall side of the desulfurization tower 21 indicated by reference numeral 12b in FIG. 3 (a), the desulfurizing agent 12 reacts with hydrogen sulfide gas (adsorbs hydrogen sulfide gas) to become black, and other portions indicated by reference numeral 12a. The desulfurizing agent 12 remained unreacted. And after this time, the gas adsorption rate only decreased.

  After 52 days have passed since the start of verification, the desulfurization agent 12 on the gas inlet 8 side (lower side in FIG. 3A) in the desulfurization agent filling portion in the desulfurization tower 21, the gas inlet 8 side and gas on the desulfurization agent filling portion Analysis of the desulfurization agent 12 on the outlet 9 side (upper side in FIG. 3 (a)) with the gas in the desulfurization agent filling portion at the intermediate portion with the outlet 9 side by sulfur X-ray analysis is performed by fluorescent X-ray analysis. The percentage of was analyzed.

  In any part, the sulfur (S) content of the desulfurizing agent 12 is equal to the sulfur (S) content of the desulfurizing agent in the region on the inner peripheral wall side of the desulfurization tower 21 indicated by reference numeral 12b in FIG. However, it was higher than the sulfur (S) content of the desulfurizing agent at other locations indicated by reference numeral 12a.

  From this, it was recognized that the gas flow in the desulfurization tower 1 was unevenly distributed as indicated by an arrow A in FIG.

  On the other hand, the desulfurization apparatus of the present invention using the same desulfurization agent 12 as that used in the conventional desulfurization apparatus described above and formed in a columnar shape and a granular shape in the same manner was verified in the same manner. It was.

  A cylindrical body having a diameter R1 of 11 mm and a longitudinal length L of 10 to 30 mm (average 20 mm) was used as the columnar desulfurizing agent 2, and a sphere having a diameter R2 of 5 mm was used as the granular desulfurizing agent 3. Such a columnar desulfurizing agent 2 and a granular desulfurizing agent 3 are shown in FIG. 1A in the desulfurizing tower 1 having the same shape, structure and capacity as the desulfurizing tower 21 employed in the conventional desulfurizing apparatus. The desulfurization apparatus of the present invention was prepared by filling the sample and verified in the same manner as the conventional desulfurization apparatus.

  In this desulfurization apparatus of the present invention, the gas adsorption rate was consistently higher than that of the conventional desulfurization apparatus compared, and the gas adsorption rate when 52 days had passed after the start of verification was also higher than that of the conventional desulfurization apparatus compared. And the gas adsorption rate when 73 days passed after the verification start became equivalent to the gas adsorption rate when 52 days passed after the verification start of the compared conventional desulfurization apparatus.

  At this point, the desulfurizing agent 2 on the gas inlet 8 side (the lower side in FIG. 1A) in the desulfurizing agent filling portion in the desulfurization tower 1, the gas inlet 8 side and the gas outlet 9 side in the desulfurizing agent filling portion Analysis of the desulfurization agents 2 and 3 on the outlet 9 side (upper side in FIG. 1A) by the gas in the desulfurization agent 2 and 3 in the middle portion and the sulfur (S) content The percentage was analyzed.

  On the gas inlet 8 side (lower side in FIG. 1A) in the desulfurization agent filling portion in the desulfurization tower 1, the sulfur (S) content of the desulfurization agent 2 in the region on the inner peripheral wall side of the desulfurization tower 1 However, the sulfur (S) content of the desulfurizing agent 2 in the central region was higher.

  In the intermediate portion between the gas inlet 8 side and the gas outlet 9 side in the desulfurization agent filling portion, the sulfur (S) content of the desulfurization agent 2 in the central region is more in the region on the inner peripheral wall side of the desulfurization tower 1. The sulfur (S) content of the desulfurizing agent 3 was higher.

  Further, the sulfur (S) content of the desulfurizing agent 2 in the central region is also greater in the desulfurizing tower 1 on the outlet 9 side (upper side in FIG. 1A) with the gas in the desulfurizing agent filling portion. It was higher than the sulfur (S) content of the desulfurization agent 3 in the region on the peripheral wall side.

  As shown in FIGS. 1A and 1B, the region 4 on the inner peripheral wall side of the desulfurization tower 1 on the gas outlet 9 side in the desulfurization agent filling part in the desulfurization tower 1 and the gas inlet 8 side in the desulfurization agent filling part The desulfurizing agent 3 is ring-shaped in the region 5 on the inner peripheral wall side of the desulfurization tower 1 in the middle between the gas outlet 9 side and the desulfurizing agent 2 in the other region in the desulfurizing agent filling part in the desulfurization tower 1. , And the desulfurizing agent 3 and the desulfurizing agent 2 have different shapes (the desulfurizing agent 2 is a cylindrical body and the desulfurizing agent 3 is a sphere). The gas flow that has started to rise along the inner peripheral wall of the desulfurization tower 1 flows toward the center of the desulfurization tower 1 from the 8th side (the lower side in FIG. 1 (a)) toward the intermediate portion. The direction seems to have changed.

  As a result, it is recognized that the ratio of the desulfurization agent 2 packed in the center of the desulfurization tower 1 used for hydrogen sulfide gas adsorption is improved.

  In the case of this verification test, in the conventional desulfurization apparatus in which the conventional desulfurization tower 21 in which only the pellet-shaped desulfurization agent 12 that has been conventionally used is filled is employed, in order to cope with a decrease in the gas adsorption rate, When 52 days have passed since the start of verification, it is necessary to replace the entire desulfurizing agent 12, and in one year, seven replacement operations and costs for that are required.

  On the other hand, in the desulfurization apparatus of the present invention, the entire desulfurization agent 2 and 3 is replaced when 73 days have passed since the start of verification. Mu Therefore, it is possible to reduce the management cost by reducing the replacement work of the degreasing agent as compared with the conventional desulfurization apparatus.

  The preferred embodiments and examples of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to these, and various forms are possible within the technical scope grasped from the description of the claims. Can be changed.

DESCRIPTION OF SYMBOLS 1 Desulfurization tower 2 (Cylindrical shape) Desulfurization agent 3 (Granular) Desulfurization agent 4, 5 The area | region of the desulfurization tower inner peripheral wall side of the desulfurization agent currently filled in the desulfurization tower 8 Desulfurization agent 21 Conventional desulfurization tower

Claims (1)

A gas inlet arranged in a direction in which the central axis extends in the position of the central axis on one side of the desulfurization tower in a cylindrical desulfurization tower containing the desulfurization agent in a desulfurization agent filling portion formed inside The desulfurization gas is introduced through a gas outlet disposed on the side of the desulfurization tower opposite to the side where the gas inlet is disposed, and the desulfurization gas is discharged. agent is passed through the sulfide-containing gas into the filling unit, in the desulfurization apparatus to adsorb the hydrogen sulfide of the sulfide-containing gas to the desulfurizing agent,
The inner peripheral wall of said desulfurization tower of the intermediate portion between the front region of the inner peripheral wall of said desulfurization tower of the gas outlet side in Kida' agent filling portion and the gas outlet and the gas inlet side of the desulfurizing agent packed portion A desulfurizing agent filled in a ring shape along the inner peripheral wall surface of the desulfurization tower in each of the side regions;
And a desulfurizing agent to be filled in the other regions before Kida' agent filling unit,
A desulfurization apparatus having different shapes of desulfurization agents ,
A region on the inner peripheral wall side of the desulfurization tower on the gas outlet side in the desulfurizing agent filling portion, and an inner peripheral wall side of the desulfurization tower in an intermediate portion between the gas inlet side and the gas outlet side in the desulfurizing agent filling portion. The shape of the desulfurizing agent filled in a ring shape along the inner peripheral wall surface of the desulfurization tower in each region is granular,
The shape of the desulfurizing agent filled in the other region in the desulfurizing agent filling part is a columnar shape,
The cylindrical desulfurization agent is a cylindrical body having a diameter of 9 to 13 mm and a longitudinal length of 0.9 to 3 times the diameter,
The desulfurization apparatus characterized in that the granular desulfurization agent is a sphere having a diameter 0.5 times the diameter of the cylindrical desulfurization agent .

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