JPH0230730B2 - KANSHIKIHAIENDATSURYUSETSUBINIOKERUSHUJINKINOFUIRUTAAFUSHOKUBOSHIHO - Google Patents
KANSHIKIHAIENDATSURYUSETSUBINIOKERUSHUJINKINOFUIRUTAAFUSHOKUBOSHIHOInfo
- Publication number
- JPH0230730B2 JPH0230730B2 JP60282622A JP28262285A JPH0230730B2 JP H0230730 B2 JPH0230730 B2 JP H0230730B2 JP 60282622 A JP60282622 A JP 60282622A JP 28262285 A JP28262285 A JP 28262285A JP H0230730 B2 JPH0230730 B2 JP H0230730B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- reduction furnace
- dust collector
- temperature
- sulfur
- 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.)
- Expired - Lifetime
Links
- 239000007789 gas Substances 0.000 claims description 52
- 239000000428 dust Substances 0.000 claims description 25
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 9
- 239000003546 flue gas Substances 0.000 claims description 9
- 238000006477 desulfuration reaction Methods 0.000 claims description 8
- 230000023556 desulfurization Effects 0.000 claims description 8
- 238000005260 corrosion Methods 0.000 claims description 7
- 230000007797 corrosion Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000006722 reduction reaction Methods 0.000 description 27
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 18
- 229910052717 sulfur Inorganic materials 0.000 description 18
- 239000011593 sulfur Substances 0.000 description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 7
- 238000011084 recovery Methods 0.000 description 4
- 239000000295 fuel oil Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 239000012716 precipitator Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は乾式排煙脱硫設備のSO2還元炉の下流
側に設置され、還元炉出口ガスに含まれるダスト
を除くために利用される集塵器のフイルターを、
腐食から保護する方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention is a collection device installed downstream of the SO 2 reduction furnace of dry flue gas desulfurization equipment and used to remove dust contained in the reduction furnace outlet gas. The filter of the dust container,
Concerning how to protect against corrosion.
［従来の技術］
乾式排煙脱硫法の一つとして、SO2含有排ガス
を活性炭吸着剤と接触させてSO2をこれに吸着さ
せて除去する方法が知られている。この方法では
SO2を吸着した活性炭を高温不活性ガスで再生す
るとともに、活性炭から脱離するSO2をSO2リツ
チガスとして回収する。そしてこのSO2リツチガ
スをSO2還元炉に供給し、コークス等の炭素質触
媒と直交流で接触させることによりSO2を蒸気状
イオウに還元する。蒸気状イオウを含有する還元
炉出口ガスは、これを集塵器に通して除塵後、イ
オウ回収装置に送つて蒸気状イオウを凝縮分離
し、しかる後、残余のガスをクラウス反応器に供
給して新ためてイオウを生成させ、反応器出口ガ
スからこのイオウを凝縮分離するのが一般的であ
る。[Prior Art] As one of the dry flue gas desulfurization methods, a method is known in which SO 2 -containing flue gas is brought into contact with an activated carbon adsorbent to adsorb and remove SO 2 . in this way
The activated carbon that has adsorbed SO 2 is regenerated with high-temperature inert gas, and the SO 2 desorbed from the activated carbon is recovered as SO 2- rich gas. Then, this SO 2 rich gas is supplied to an SO 2 reduction furnace, and brought into contact with a carbonaceous catalyst such as coke in a cross flow to reduce SO 2 to vaporized sulfur. The reduction furnace outlet gas containing vaporous sulfur is passed through a dust collector to remove dust, and then sent to a sulfur recovery device to condense and separate the vaporous sulfur.Then, the remaining gas is supplied to the Claus reactor. It is common practice to generate sulfur anew and condense and separate the sulfur from the reactor outlet gas.
［発明が解決しようとする問題点］
乾式排煙脱硫法を実施する場合、SO2還元炉の
スタートアツプ時に必要な還元炉の予熱は、燃焼
排ガスを利用して行なわれるが、この排ガスには
かなりのSO2が含まれており、例えば、重油燃焼
排ガスには略1000ppm程度のSO2が含まれている
のが通常である。従つて、還元炉の温度がSO2の
還元反応温度に上昇するまでは、予熱に使用した
排ガスのSO2が、そのまま集塵器に送られること
になる。[Problems to be solved by the invention] When implementing the dry flue gas desulfurization method, the preheating of the reduction furnace required at startup of the SO 2 reduction furnace is performed using combustion exhaust gas, but this exhaust gas has A considerable amount of SO 2 is contained; for example, heavy oil combustion exhaust gas usually contains about 1000 ppm of SO 2 . Therefore, until the temperature of the reduction furnace rises to the SO 2 reduction reaction temperature, the SO 2 of the exhaust gas used for preheating is sent as is to the dust collector.
ところで、排煙脱硫設備に於ける集塵器のフイ
ルターには、ステンレス系の繊維が使用されてい
る。このフイルターは240〜280℃の温度範囲でし
か耐食性を保持できないので、水蒸気、SO2、
SO3等を含むガスが露点以下の温度でフイルター
に接触した場合には、フイルターは腐食されるこ
とになる。従つて、上記のようにSO2含有排ガス
でSO2還元炉を予熱するのが慣行である従来法で
は、スタートアツプ時に集塵器のフイルターが腐
食されてしまう事態を、殆ど回避することができ
ない。 Incidentally, stainless steel fibers are used in the filters of dust collectors in flue gas desulfurization equipment. This filter can only maintain corrosion resistance in the temperature range of 240-280℃, so it cannot be exposed to water vapor, SO 2 ,
If a gas containing SO 3 etc. comes into contact with the filter at a temperature below the dew point, the filter will corrode. Therefore, with the conventional method described above, in which it is customary to preheat the SO 2 reduction furnace with SO 2 -containing exhaust gas, it is almost impossible to avoid the situation where the dust collector filter is corroded during startup. .
また、SO2還元炉の定常運転時について言え
ば、還元炉出口ガスは、これに含まれる蒸気状イ
オウを凝縮分離後、クラウス反応器に供給する関
係上、還元炉出口ガス中のH2S／SO2または
（H2S＋COS）／SO2のモル比が、ほぼ２に保持
されるようSO2還元炉内温度を制御するので、還
元炉出口ガスの温度もそれに応じて変化する。従
つて、還元炉出口ガスの温度が、240〜280℃の温
度範囲で逸脱した場合にも、集塵器のフイルター
は腐食されてしまうことになる。 In addition, during steady operation of the SO 2 reduction furnace, the H 2 S in the reduction furnace outlet gas is supplied to the Claus reactor after the vaporized sulfur contained therein is condensed and separated. Since the temperature inside the SO 2 reduction furnace is controlled so that the molar ratio of /SO 2 or (H 2 S+COS)/SO 2 is maintained at approximately 2 , the temperature of the gas at the exit of the reduction furnace changes accordingly. Therefore, even if the temperature of the reducing furnace outlet gas deviates within the temperature range of 240 to 280°C, the filter of the dust collector will be corroded.
［問題点を解決するための手段］
本発明は、乾式排煙脱硫設備のSO2還元炉と、
その下流側に設置される集塵器のと間に熱交換器
を設け、この熱交換器にて前記還元炉の出口ガス
を加熱または冷却して集塵器に入るガスの温度を
調節することによつて、上に指摘した集塵器フイ
ルターの腐食を防止する。[Means for solving the problems] The present invention provides an SO 2 reduction furnace of dry flue gas desulfurization equipment,
A heat exchanger is provided between the dust collector installed on the downstream side, and the heat exchanger heats or cools the outlet gas of the reduction furnace to adjust the temperature of the gas entering the dust collector. This prevents the corrosion of the dust collector filter mentioned above.
［作用］
以下、添付図面にそつて本発明のフイルター防
食方法をさらに詳しく説明する。乾式排煙脱硫設
備の各装置が定常運転されている場合、活性炭再
生塔（図示略）からもたらされるSO2リツチガス
は、酸素含有ガス（典型的には空気）と共に、ラ
イン１からSO2還元炉２に導入され、炉内で移動
床を形成しているコークスなどの炭素質触媒と接
触する。還元炉内の温度は、SO2が蒸気状イオウ
に還元され、しかも還元炉出口ガスのH2S／SO2
モル比又は（H2S＋COS）／SO2モル比が略２に
保持されるよう、常時調節されている。従つて、
還元炉２からは前記のモル比が略２に保持され、
蒸気状イオウを含有するガスが取り出される。こ
の還元炉出口ガスは、次いで熱交換器４の例えば
胴側に供給され、ライン５から管側に供給される
ガスと熱交換後、ライン６を経て集塵器７に送ら
れる。[Function] Hereinafter, the filter corrosion prevention method of the present invention will be explained in more detail with reference to the accompanying drawings. When each device of the dry flue gas desulfurization equipment is in steady operation, the SO 2 rich gas coming from the activated carbon regeneration tower (not shown) is sent from line 1 to the SO 2 reduction furnace together with oxygen-containing gas (typically air). 2 and comes into contact with a carbonaceous catalyst such as coke forming a moving bed in the furnace. The temperature inside the reduction furnace is such that SO 2 is reduced to vaporized sulfur, and H 2 S/SO 2 of the reduction furnace outlet gas
The molar ratio or (H 2 S+COS)/SO 2 molar ratio is constantly adjusted to be maintained at approximately 2. Therefore,
From the reduction furnace 2, the molar ratio is maintained at approximately 2,
A gas containing vaporous sulfur is removed. This reducing furnace outlet gas is then supplied to, for example, the shell side of the heat exchanger 4, and after heat exchange with the gas supplied from the line 5 to the tube side, is sent to the dust collector 7 via the line 6.
先に述べたとおり、集塵器７のフイルターは
240〜280℃の温度範囲でしか耐食性を発揮しな
い。従つて、本発明では符号８で示される制御機
器TICにて、ライン６を流れるガスの温度を検知
し、その温度が240℃以下の場合は、後述するテ
ールガス焼却炉９からライン１０に送られる燃焼
排ガスを、制御弁１１を介してライン５に供給
し、還元炉出口ガスを加熱する。一方、ライン６
を流れるガスの温度が280℃以上の場合は、空気
ブロア１２からの空気を、制御弁１３を介してラ
イン５に供給し、還元炉出口ガスを冷却する。従
つて、集塵器７のフイルターはライン６からのガ
スによつて腐食されることがない。 As mentioned earlier, the filter of dust collector 7 is
It exhibits corrosion resistance only in the temperature range of 240-280℃. Therefore, in the present invention, the temperature of the gas flowing through the line 6 is detected by the control device TIC indicated by the reference numeral 8, and if the temperature is 240°C or less, the gas is sent to the line 10 from the tail gas incinerator 9, which will be described later. The combustion exhaust gas is supplied to the line 5 via the control valve 11 to heat the reducing furnace outlet gas. On the other hand, line 6
When the temperature of the gas flowing through is 280° C. or higher, air from the air blower 12 is supplied to the line 5 via the control valve 13 to cool the reducing furnace outlet gas. Therefore, the filter of the precipitator 7 will not be corroded by the gas from the line 6.
集塵器７でダストが除去されたガスは、イオウ
コンデンサ、ノツクアウトドラム及びイオウスク
ラバーで通常構成されるイオウ回収装置１４に供
給され、ここでガス中の蒸気状イオウが回収され
る。蒸気状イオウが分離されたガスは、次いでク
ラウス反応器１５に送られてクラウス反応に供さ
れ、ここで生成された蒸気状イオウを含むクラウ
ス反応器出口ガスは、前述したと同様な構成のイ
オウ回収装置１６に供されて蒸気状イオウが凝縮
分離された後、テールガス焼却炉９に送られて焼
却される。そして、この際得られる燃焼排ガス
は、必要に応じてライン１０からライン５に送ら
れ、熱交換器４に供給される。 The gas from which dust has been removed in the precipitator 7 is supplied to a sulfur recovery device 14, which usually comprises a sulfur condenser, a knockout drum, and a sulfur scrubber, where vaporized sulfur in the gas is recovered. The gas from which the vaporous sulfur has been separated is then sent to the Claus reactor 15 and subjected to the Claus reaction, and the Claus reactor outlet gas containing vaporous sulfur produced here is a sulfur reactor having the same structure as described above. After being supplied to the recovery device 16 to condense and separate the vaporous sulfur, it is sent to the tail gas incinerator 9 and incinerated. Then, the combustion exhaust gas obtained at this time is sent from the line 10 to the line 5 as necessary, and is supplied to the heat exchanger 4.
次に、SO2還元炉２のスタートアツプ時に於け
る本発明の作用を説明すると、一般に還元炉は、
ライン３から供給される重油燃焼排ガスを還元炉
２に導入することによつて予熱される。既述した
通り、この予熱用排ガスは、水蒸気、SO2、SO3
等を含み、還元炉通過後は熱交換器４を経て集塵
器７に送られるので、当該ガス温度が露点以下で
ある場合には、集塵器のフイルターが腐食され
る。しかし、本発明では熱交換器４にて、還元炉
を出た予熱用排ガスを適当な加熱媒体にて、例え
ば重油燃焼排ガスにて露点以上の温度に加熱され
る。従つて、スタートアツプ時にも、集塵器のフ
イルターが腐食されることがない。 Next, to explain the operation of the present invention at the time of starting up the SO 2 reduction furnace 2, generally speaking, the reduction furnace is
The heavy oil combustion exhaust gas supplied from the line 3 is introduced into the reduction furnace 2 to be preheated. As mentioned above, this preheating exhaust gas contains water vapor, SO 2 , SO 3
After passing through the reduction furnace, the gas is sent to the dust collector 7 via the heat exchanger 4, so if the gas temperature is below the dew point, the filter of the dust collector will corrode. However, in the present invention, in the heat exchanger 4, the preheating exhaust gas exiting the reduction furnace is heated to a temperature equal to or higher than the dew point using an appropriate heating medium, for example, heavy oil combustion exhaust gas. Therefore, the filter of the dust collector will not be corroded even during startup.
［発明の効果］
乾式排煙脱硫設備のSO2還元炉と、集塵器の間
に、熱交換器を設置すれば、集塵器に入るガスの
温度を任意に調節することができるので、240〜
280℃の温度範囲でしか耐食性を発揮できない集
塵器フイルターの腐食を、未然に防止することが
できる。[Effect of the invention] If a heat exchanger is installed between the SO 2 reduction furnace of the dry flue gas desulfurization equipment and the dust collector, the temperature of the gas entering the dust collector can be adjusted as desired. 240～
Corrosion of dust collector filters, which can only exhibit corrosion resistance in the temperature range of 280°C, can be prevented.
添付図面は本発明方法を実施する場合のフロー
シートである。
１……SO2リツチガスライン、２……SO2還元
炉、３……還元炉予熱用ガスライン、４……熱交
換器、５……加熱／冷却用ガスライン、６……集
塵器入口ガスライン、７……集塵器、８……制御
器機、９……テールガス焼却炉、１０……燃焼排
ガスライン、１１，１３……制御弁、１２……空
気ブロア、１４，１６……イオウ回収装置、１５
……クラウス反応器。
The accompanying drawings are flow sheets for carrying out the method of the present invention. 1... SO 2 rich gas line, 2... SO 2 reduction furnace, 3... Gas line for preheating the reduction furnace, 4... Heat exchanger, 5... Gas line for heating/cooling, 6... Dust collector Inlet gas line, 7... Dust collector, 8... Controller, 9... Tail gas incinerator, 10... Combustion exhaust gas line, 11, 13... Control valve, 12... Air blower, 14, 16... Sulfur recovery device, 15
...Klaus reactor.
Claims (1)
の間に熱交換器を設置し、この熱交換器にてSO2
還元炉の出口ガスを加熱もしくは冷却して、集塵
器に入るガスの温度を調節することを特徴とする
前記集塵器のフイルター腐食防止法。1 A heat exchanger is installed between the SO 2 reduction furnace of the dry flue gas desulfurization equipment and the dust collector, and this heat exchanger reduces SO 2
A method for preventing corrosion of a filter in a dust collector, characterized in that the temperature of the gas entering the dust collector is adjusted by heating or cooling the outlet gas of the reduction furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60282622A JPH0230730B2 (en) | 1985-12-16 | 1985-12-16 | KANSHIKIHAIENDATSURYUSETSUBINIOKERUSHUJINKINOFUIRUTAAFUSHOKUBOSHIHO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60282622A JPH0230730B2 (en) | 1985-12-16 | 1985-12-16 | KANSHIKIHAIENDATSURYUSETSUBINIOKERUSHUJINKINOFUIRUTAAFUSHOKUBOSHIHO |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62140623A JPS62140623A (en) | 1987-06-24 |
| JPH0230730B2 true JPH0230730B2 (en) | 1990-07-09 |
Family
ID=17654916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60282622A Expired - Lifetime JPH0230730B2 (en) | 1985-12-16 | 1985-12-16 | KANSHIKIHAIENDATSURYUSETSUBINIOKERUSHUJINKINOFUIRUTAAFUSHOKUBOSHIHO |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0230730B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0984U (en) * | 1996-07-26 | 1997-02-14 | 三菱農機株式会社 | Lever guide device for tractor |
-
1985
- 1985-12-16 JP JP60282622A patent/JPH0230730B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0984U (en) * | 1996-07-26 | 1997-02-14 | 三菱農機株式会社 | Lever guide device for tractor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62140623A (en) | 1987-06-24 |
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