JPH05220329A - Regenerated exhaust gas treating equipment - Google Patents

Regenerated exhaust gas treating equipment

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Publication number
JPH05220329A
JPH05220329A JP4025388A JP2538892A JPH05220329A JP H05220329 A JPH05220329 A JP H05220329A JP 4025388 A JP4025388 A JP 4025388A JP 2538892 A JP2538892 A JP 2538892A JP H05220329 A JPH05220329 A JP H05220329A
Authority
JP
Japan
Prior art keywords
exhaust gas
gas
regeneration
sulfur
regenerated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4025388A
Other languages
Japanese (ja)
Inventor
Atsushi Kobayashi
惇 小林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHI Corp
Original Assignee
IHI Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IHI Corp filed Critical IHI Corp
Priority to JP4025388A priority Critical patent/JPH05220329A/en
Publication of JPH05220329A publication Critical patent/JPH05220329A/en
Pending legal-status Critical Current

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  • Treating Waste Gases (AREA)
  • Industrial Gases (AREA)

Abstract

PURPOSE:To prevent trouble caused by sulfur included in regenerated exhaust gas. CONSTITUTION:To a regenerator 2 for regenerating a desulfurizing agent by bringing regenerated gas into contact with a fixed bed or a moving bed of a desulfurizing agent which gave gas to be treated desulfurization treatment under high temp. to regenerate the desulfurizating agent is connected a regenerated exhaust gas line 12 for discharging sulfur dioxide contg. regenerated exhaust gas generated on the regeneration and to the regenerated exhaust gas line 12 is connected an air supply line 13 for supplying air for burning sulfur in the regenerated exhaust gas.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、固定床式,移動床式の
脱硫装置の再生塔からの再生排ガスを処理する再生排ガ
ス処理装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regeneration exhaust gas treatment apparatus for treating regeneration exhaust gas from a regeneration tower of a fixed bed type or moving bed type desulfurization apparatus.

【0002】[0002]

【従来の技術】石炭ガス化ガス等には不純物として硫化
水素等の硫黄分が含まれているために、大気汚染防止及
び各種装置類損傷防止の見地より精製過程にて硫化水素
等の硫黄分の除去がなされている。
2. Description of the Related Art Since sulfur gas such as hydrogen sulfide is contained as an impurity in coal gasification gas, etc., sulfur content such as hydrogen sulfide is contained in the refining process from the viewpoint of preventing air pollution and damage to various equipment. Has been removed.

【0003】硫黄分を除去する装置としては固定床式,
移動床式の脱硫装置が知られている。脱硫装置は、石炭
ガス化ガス等の被処理ガスと酸化鉄系等の脱硫剤とを接
触させて、被処理ガスを脱硫処理するものであり、脱硫
処理後の脱硫剤が酸素を含む再生ガスにより高温下で再
生される。その再生時に発生した亜硫酸ガスを含む再生
排ガスは、亜硫酸ガス処理装置に導かれて亜硫酸ガスが
処理される。
As a device for removing sulfur, a fixed bed type,
A moving bed type desulfurization device is known. The desulfurization device is a device for desulfurizing the gas to be treated by bringing the gas to be treated such as coal gasification gas and a desulfurizing agent such as iron oxide into contact, and the desulfurizing agent after desulfurization treatment is a regenerated gas containing oxygen. Is regenerated at high temperature. Regenerated exhaust gas containing sulfurous acid gas generated at the time of regeneration is introduced to a sulfurous acid gas treatment device to treat sulfurous acid gas.

【0004】[0004]

【発明が解決しようとする課題】ところで、脱硫処理後
の脱硫剤を再生する場合、脱硫剤と再生ガスを接触させ
て反応(例えば脱硫剤が酸化鉄型の場合、4FeS+7
2 →2Fe2 3 +4SO2 )させ、脱硫剤を再生す
るが、その再生時に発生した亜硫酸ガス(SO 2 )が脱
硫処理後の脱硫剤と反応(4FeS+3SO2 →2Fe
2 3 +7/2S2 )して単体硫黄が発生することがあ
る。
By the way, after desulfurization treatment
When regenerating the desulfurizing agent, contact the desulfurizing agent with the regeneration gas.
Reaction (for example, when the desulfurizing agent is iron oxide type, 4FeS + 7
O2→ 2Fe2O3+ 4SO2) And regenerate the desulfurizing agent
However, sulfur dioxide gas (SO 2) Is off
Reaction with desulfurization agent after sulfur treatment (4FeS + 3SO2→ 2Fe
2O3+ 7 / 2S2) And elemental sulfur may be generated.
It

【0005】そのように硫黄が発生すると、その硫黄が
亜硫酸ガスと共に再生排ガスラインに流入するため、再
生排ガスの温度が下がると硫黄が固化して再生ガスライ
ンがつまることがある。また、亜硫酸ガス処理装置によ
ってはガス中に硫黄が含まれると不具合が生じる。例え
ば、SO2 を石灰石こうによって処理する場合には、石
こうに不純物として硫黄が含まれる。
When the sulfur is generated in this way, the sulfur flows into the regeneration exhaust gas line together with the sulfurous acid gas. Therefore, when the temperature of the regeneration exhaust gas is lowered, the sulfur is solidified and the regeneration gas line may be clogged. Further, depending on the sulfurous acid gas treatment device, a problem occurs when the gas contains sulfur. For example, when SO 2 is treated with lime gypsum, the gypsum contains sulfur as an impurity.

【0006】そこで、本発明は、このような事情を考慮
してなされたものであり、その目的は、再生排ガスに含
まれる硫黄によるトラブルを防止することを可能にする
再生排ガス処理装置を提供することにある。
Therefore, the present invention has been made in view of the above circumstances, and an object thereof is to provide a regeneration exhaust gas treatment apparatus capable of preventing troubles due to sulfur contained in regeneration exhaust gas. Especially.

【0007】[0007]

【課題を解決するための手段】上記目的を達成するため
に、本発明の再生排ガス処理装置は、被処理ガスを脱硫
処理した脱硫剤の固定床又は移動床に再生ガスを高温下
で接触させて脱硫剤を再生する再生塔に、その再生時に
発生した亜硫酸ガスを含む再生排ガスを排出する再生排
ガスラインを接続し、その再生排ガスラインに、再生排
ガス中の硫黄を燃焼するための空気を供給する空気供給
ラインを接続したものである。
In order to achieve the above object, the apparatus for treating regenerated exhaust gas of the present invention comprises regenerating gas in contact with a fixed bed or a moving bed of a desulfurizing agent obtained by desulfurizing a gas to be treated at a high temperature. The regeneration tower that regenerates the desulfurizing agent is connected to a regeneration exhaust gas line that discharges the regeneration exhaust gas containing sulfur dioxide gas generated during regeneration, and the regeneration exhaust gas line is supplied with air for burning sulfur in the regeneration exhaust gas. It is connected to the air supply line.

【0008】[0008]

【作用】再生排ガスラインに再生排ガス中の硫黄を燃焼
するための空気を供給する空気供給ラインを接続するこ
とで、再生塔からの高温の再生排ガスに空気が供給され
ると、ガス中に硫黄が含まれている場合、その硫黄が空
気により燃焼されるので、再生排ガス中の硫黄が除去さ
れることになり、硫黄によるトラブルを防止することが
可能となる。
[Operation] By connecting an air supply line for supplying air for burning the sulfur in the regenerated exhaust gas to the regenerated exhaust gas line, when air is supplied to the high temperature regenerated exhaust gas from the regeneration tower, sulfur is contained in the gas. In the case of containing, since the sulfur is burned by the air, the sulfur in the regenerated exhaust gas is removed, and it becomes possible to prevent the trouble due to the sulfur.

【0009】[0009]

【実施例】以下、本発明の実施例を添付図面に基づいて
説明する。
Embodiments of the present invention will be described below with reference to the accompanying drawings.

【0010】図1において、1は固定床式の脱硫装置を
示し、この脱硫装置1には硫化水素等の硫黄分を含む石
炭ガス化ガス等の被処理ガスを脱硫処理する処理塔2が
備えられている。
In FIG. 1, reference numeral 1 denotes a fixed-bed desulfurization apparatus. The desulfurization apparatus 1 is provided with a treatment tower 2 for desulfurizing a gas to be treated such as coal gasification gas containing sulfur such as hydrogen sulfide. Has been.

【0011】処理塔2は、筒体状に形成され、塔2内の
温度が約 300〜500 ℃又は約 600〜800 ℃に維持される
ようになっている。この処理塔2の一端には第1開閉弁
3を有する被処理ガスライン4が接続されていると共
に、他端には第2開閉弁5を有する脱硫ガスライン6が
接続されている。塔2内には、酸化鉄系等の脱硫剤が充
填された固定床式の脱硫層7が設けられており、被処理
ガスライン4から導入された被処理ガスは、脱硫層7の
脱硫剤と接触して脱硫処理された後、脱硫ガスライン6
に流入するようになっている。
The processing tower 2 is formed in a cylindrical shape, and the temperature inside the tower 2 is maintained at about 300 to 500 ° C or about 600 to 800 ° C. A treated gas line 4 having a first opening / closing valve 3 is connected to one end of the processing tower 2, and a desulfurization gas line 6 having a second opening / closing valve 5 is connected to the other end. A fixed bed desulfurization layer 7 filled with a desulfurizing agent such as iron oxide is provided in the tower 2, and the gas to be treated introduced from the gas line 4 to be treated is the desulfurizing agent of the desulfurizing layer 7. After being desulfurized by contact with the desulfurization gas line 6
It is supposed to flow into.

【0012】上記脱硫ガスライン6の処理塔2と第2開
閉弁5の間には、第3開閉弁8を有する再生ガス供給ラ
イン9が接続され、このライン9に再生用空気の再生用
空気供給ライン10が接続されている。また、上記被処
理ガスライン4の第1開閉弁3と処理塔2の間には、第
4開閉弁11を有する再生排ガスライン12が接続され
ており、脱硫剤を再生する場合には第1及び第2開閉弁
3,5が閉じられて、再生ガス供給ライン9からの酸素
を含む再生ガスが塔2内を被処理ガスとは逆に流れて、
脱硫層7に流入するようになっている。さらに、再生排
ガスライン12には、再生排ガス中の硫黄を燃焼するた
めの空気を供給する空気供給ライン13が接続されてい
る。
A regeneration gas supply line 9 having a third on-off valve 8 is connected between the processing tower 2 and the second on-off valve 5 of the desulfurization gas line 6, and the regeneration air of the regeneration air is connected to this line 9. The supply line 10 is connected. Further, a regeneration exhaust gas line 12 having a fourth on-off valve 11 is connected between the first on-off valve 3 and the treatment tower 2 of the gas line 4 to be treated, and when regenerating the desulfurizing agent, the first re-exhaust gas line 12 is connected. And the second on-off valves 3 and 5 are closed, the regenerated gas containing oxygen from the regenerated gas supply line 9 flows in the tower 2 in the opposite direction to the gas to be treated,
It flows into the desulfurization layer 7. Further, the regeneration exhaust gas line 12 is connected to an air supply line 13 that supplies air for burning sulfur in the regeneration exhaust gas.

【0013】次に本実施例の作用を説明する。Next, the operation of this embodiment will be described.

【0014】被処理ガスを脱硫する場合には、第1及び
第2開閉弁3,5が開けられると共に、第3及び第4開
閉弁8,11が閉じられる。これにより、石炭ガス化ガ
ス等の被処理ガスは、被処理ガスライン4から処理塔2
内に導かれて脱硫層7に至り、層7内で高温(約 300〜
500 ℃)高圧(約20〜30気圧)下で脱硫剤と接触してガ
ス中の硫黄分が脱硫剤に吸収されて脱硫処理される。例
えば、酸化鉄の脱硫剤を用いた場合、その反応式は、F
3 4 +3H2 S+H2 →3FeS+4H2Oとな
る。
When desulfurizing the gas to be treated, the first and second on-off valves 3 and 5 are opened, and the third and fourth on-off valves 8 and 11 are closed. As a result, the gas to be processed such as coal gasification gas is supplied from the gas line 4 to be processed to the processing tower 2
Is guided to the desulfurization layer 7 and is heated to a high temperature (about 300 ~
When contacted with a desulfurizing agent under high pressure (about 20 to 30 atm), the sulfur content in the gas is absorbed by the desulfurizing agent and desulfurized. For example, when an iron oxide desulfurizing agent is used, the reaction formula is F
e 3 O 4 + 3H 2 S + H 2 → 3FeS + 4H 2 O.

【0015】脱硫処理された処理ガスは、脱硫ガスライ
ン6に入り、ガスタービン等の燃料として利用される。
The desulfurized processing gas enters the desulfurization gas line 6 and is used as fuel for a gas turbine or the like.

【0016】そして、被処理ガスの脱硫処理が終わる
と、第1及び第2開閉弁3,5が閉じられると共に、第
3及び第4開閉弁8,11が開けられ、処理塔2が実質
的に再生塔となる。再生用空気供給ライン9から再生用
空気が供給された再生ガスが再生ガス供給ライン9を介
して処理塔(再生塔)2内に導入される。尚、再生ガス
は再生排ガスを処理した後のガスを用いてもよい。
When the desulfurization treatment of the gas to be treated is completed, the first and second on-off valves 3 and 5 are closed and the third and fourth on-off valves 8 and 11 are opened, so that the treatment tower 2 is substantially closed. It becomes a regeneration tower. The regeneration gas supplied with the regeneration air from the regeneration air supply line 9 is introduced into the processing tower (regeneration tower) 2 through the regeneration gas supply line 9. The regenerated gas may be a gas obtained by treating the regenerated exhaust gas.

【0017】導入された再生ガスは、被処理ガスとは逆
に流れて脱硫層7に入り、そこで高温(約 600〜800
℃)下で硫黄分を吸収した脱硫剤と接触して反応し、脱
硫剤が再生される。脱硫剤に吸収されていた硫黄分は、
亜硫酸ガスとなって再生排ガスの一部として再生排ガス
ライン12に流入する。
The introduced regeneration gas flows in the opposite direction to the gas to be treated and enters the desulfurization layer 7, where it is heated to a high temperature (about 600 to 800).
The desulfurizing agent is regenerated by contacting with the desulfurizing agent which has absorbed sulfur under (° C) and reacting. The sulfur content absorbed by the desulfurizing agent is
It becomes sulfurous acid gas and flows into the recycled exhaust gas line 12 as a part of the recycled exhaust gas.

【0018】処理塔2内では、再生ガスは塔2内を脱硫
時とは逆に流れるため、脱硫層7内の比較的硫黄分が吸
収されていない層7から徐々に脱硫剤が再生されるの
で、その硫黄分が吸収されていない層7で発生した亜硫
酸ガスは脱硫層7内の比較的硫黄分が吸収されていると
ころに流れ、そこで脱硫処理後の脱硫剤と反応して単体
硫黄が発生することがある。
In the treatment tower 2, since the regeneration gas flows in the tower 2 in the opposite direction to that during desulfurization, the desulfurizing agent is gradually regenerated from the layer 7 in the desulfurization layer 7 in which the sulfur content is not relatively absorbed. Therefore, the sulfurous acid gas generated in the layer 7 in which the sulfur content is not absorbed flows into the desulfurization layer 7 where the sulfur content is relatively absorbed, and reacts with the desulfurization agent after the desulfurization treatment to generate elemental sulfur. May occur.

【0019】その場合、発生した硫黄は、高温の再生排
ガスと共に処理塔2から再生排ガスライン12に流入す
る。その再生排ガスライン12には、空気供給ライン1
3から空気が供給され、その空気とガス中の硫黄が接触
すると、再生排ガスが高温であるため、硫黄が酸素と反
応して燃焼し亜硫酸ガスになる。このように再生排ガス
中の硫黄が燃焼して除去されるので、硫黄の固化による
ライン12のつまり等が防止されて、硫黄によるトラブ
ルを防止することができる。このため、再生排ガスに含
まれる亜硫酸ガスを例えば石灰石こう法により処理した
場合には、得られる石こうの品質が良くなる。
In that case, the generated sulfur flows into the regeneration exhaust gas line 12 from the treatment tower 2 together with the high temperature regeneration exhaust gas. The regeneration exhaust gas line 12 includes an air supply line 1
When air is supplied from No. 3, and the air and sulfur in the gas come into contact with each other, the temperature of the regenerated exhaust gas is high, and the sulfur reacts with oxygen to burn and become sulfurous acid gas. In this way, the sulfur in the recycled exhaust gas is burned and removed, so that clogging of the line 12 due to the solidification of sulfur is prevented, and troubles due to sulfur can be prevented. Therefore, when the sulfurous acid gas contained in the recycled exhaust gas is treated by, for example, the lime gypsum method, the quality of the obtained gypsum is improved.

【0020】なお、本実施例では固定床式の場合につい
て説明したが、移動床式の脱硫装置においても本発明の
再生排ガス処理装置を適用することができる。すなわ
ち、移動床式の再生塔の場合でも、脱硫剤と再生ガスが
向流接触するため、単体硫黄が発生することがあるの
で、上述と同様に再生塔に接続された再生排ガスライン
に再生排ガス中の硫黄を燃焼するための空気を供給する
空気供給ラインを接続してもよい。このようにしても、
再生塔からの再生排ガス中に含まれている硫黄は酸素と
反応して燃焼されるので、再生排ガス中の硫黄の除去を
行え、硫黄によるトラブルを防止することができる。
In the present embodiment, the case of the fixed bed type has been described, but the regenerated exhaust gas treatment apparatus of the present invention can be applied to a moving bed type desulfurization apparatus. That is, even in the case of a moving bed type regeneration tower, since the desulfurizing agent and the regeneration gas are in countercurrent contact with each other, elemental sulfur may be generated, so that the regeneration exhaust gas line is connected to the regeneration exhaust gas line as described above. An air supply line may be connected to supply air for burning the sulfur therein. Even with this,
Sulfur contained in the regeneration exhaust gas from the regeneration tower reacts with oxygen and is burned, so that the sulfur in the regeneration exhaust gas can be removed and troubles due to sulfur can be prevented.

【0021】[0021]

【発明の効果】以上要するに本発明によれば、再生排ガ
スラインに、再生排ガス中の硫黄を燃焼するための空気
を供給する空気供給ラインを接続したので、再生排ガス
に含まれる硫黄によるトラブルを防止できるという優れ
た効果を発揮する。
In summary, according to the present invention, since the air supply line for supplying the air for burning the sulfur in the recycled exhaust gas is connected to the recycled exhaust gas line, troubles due to the sulfur contained in the recycled exhaust gas can be prevented. It has an excellent effect that it can.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例を示す構成図である。FIG. 1 is a configuration diagram showing an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

2 処理塔(再生塔) 12 再生排ガスライン 13 空気供給ライン 2 Treatment tower (regeneration tower) 12 Regeneration exhaust gas line 13 Air supply line

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 被処理ガスを脱硫処理した脱硫剤の固定
床又は移動床に再生ガスを高温下で接触させて脱硫剤を
再生する再生塔に、その再生時に発生した亜硫酸ガスを
含む再生排ガスを排出する再生排ガスラインを接続し、
その再生排ガスラインに、再生排ガス中の硫黄を燃焼す
るための空気を供給する空気供給ラインを接続したこと
を特徴とする再生排ガス処理装置。
1. A regeneration tower for regenerating the desulfurizing agent by bringing the regenerating gas into contact with a fixed bed or a moving bed of the desulfurizing agent obtained by desulfurizing the gas to be treated at a high temperature, and a regenerating exhaust gas containing sulfurous acid gas generated during the regenerating. Connect the recycled exhaust gas line that discharges
A regeneration exhaust gas processing device, characterized in that an air supply line for supplying air for burning sulfur in the regeneration exhaust gas is connected to the regeneration exhaust gas line.
JP4025388A 1992-02-12 1992-02-12 Regenerated exhaust gas treating equipment Pending JPH05220329A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4025388A JPH05220329A (en) 1992-02-12 1992-02-12 Regenerated exhaust gas treating equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4025388A JPH05220329A (en) 1992-02-12 1992-02-12 Regenerated exhaust gas treating equipment

Publications (1)

Publication Number Publication Date
JPH05220329A true JPH05220329A (en) 1993-08-31

Family

ID=12164496

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4025388A Pending JPH05220329A (en) 1992-02-12 1992-02-12 Regenerated exhaust gas treating equipment

Country Status (1)

Country Link
JP (1) JPH05220329A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114763499A (en) * 2021-01-11 2022-07-19 中国石油化工股份有限公司 Desulfurization method for high-sulfur petroleum coke

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114763499A (en) * 2021-01-11 2022-07-19 中国石油化工股份有限公司 Desulfurization method for high-sulfur petroleum coke

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