JP2001000833A - Boiler flue gas treatment equipment - Google Patents
Boiler flue gas treatment equipmentInfo
- Publication number
- JP2001000833A JP2001000833A JP11178357A JP17835799A JP2001000833A JP 2001000833 A JP2001000833 A JP 2001000833A JP 11178357 A JP11178357 A JP 11178357A JP 17835799 A JP17835799 A JP 17835799A JP 2001000833 A JP2001000833 A JP 2001000833A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- heat
- air preheater
- electric
- flue gas
- 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
Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims description 27
- 239000003546 flue gas Substances 0.000 title claims description 27
- 239000007789 gas Substances 0.000 claims abstract description 55
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000012716 precipitator Substances 0.000 claims abstract description 23
- 230000003472 neutralizing effect Effects 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 15
- 238000002485 combustion reaction Methods 0.000 claims abstract description 14
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000011084 recovery Methods 0.000 claims description 19
- 238000006477 desulfuration reaction Methods 0.000 claims description 12
- 230000023556 desulfurization Effects 0.000 claims description 12
- 229910052815 sulfur oxide Inorganic materials 0.000 claims description 7
- 239000012717 electrostatic precipitator Substances 0.000 claims description 6
- 238000003303 reheating Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 abstract description 28
- 239000000446 fuel Substances 0.000 abstract description 6
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 abstract description 3
- 230000003009 desulfurizing effect Effects 0.000 abstract 1
- 239000002912 waste gas Substances 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 5
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 3
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 3
- 235000011130 ammonium sulphate Nutrition 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 101100316860 Autographa californica nuclear polyhedrosis virus DA18 gene Proteins 0.000 description 1
- 102100033041 Carbonic anhydrase 13 Human genes 0.000 description 1
- 101000867860 Homo sapiens Carbonic anhydrase 13 Proteins 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Treating Waste Gases (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ボイラ排煙処理設
備に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boiler flue gas treatment facility.
【０００２】[0002]
【従来の技術】図２は従来のボイラ排煙処理設備の一例
を表わすものであって、１は燃料を燃焼させ蒸気を発生
させるボイラ本体、２はボイラ本体１から排出される燃
焼排ガス中に含まれる窒素酸化物を除去するための脱硝
装置、３は脱硝装置２で窒素酸化物が除去された燃焼排
ガスとボイラ本体１へ供給される燃焼用空気等の空気と
を熱交換させるための空気予熱器、４は空気予熱器３を
通過して温度降下した燃焼排ガス中に含まれる灰を捕集
するための電気集塵機、５は電気集塵機４で灰が捕集さ
れた燃焼排ガスから熱を回収するためのガスガスヒータ
の熱回収器、６はガスガスヒータの熱回収器５で熱が回
収された燃焼排ガス中に含まれる硫黄酸化物を除去する
ための脱硫装置、７は脱硫装置６で硫黄酸化物が除去さ
れた燃焼排ガスを熱回収器５で回収した熱によって再加
熱するためのガスガスヒータの再加熱器、８はガスガス
ヒータの再加熱器７で再加熱された燃焼排ガスを大気中
へ放出するための煙突である。2. Description of the Related Art FIG. 2 shows an example of a conventional boiler flue gas treatment facility, wherein 1 is a boiler main body for burning fuel to generate steam, and 2 is a boiler exhaust gas discharged from a boiler main body 1. A denitration device 3 for removing nitrogen oxides contained therein is an air for heat exchange between the combustion exhaust gas from which the nitrogen oxides have been removed by the denitration device 2 and air such as combustion air supplied to the boiler body 1. The preheater 4 is an electric precipitator for collecting ash contained in the flue gas that has passed through the air preheater 3 and has dropped in temperature. 5 is a heat collector that collects heat from the flue gas in which the ash is collected by the electric precipitator 4. 6 is a desulfurization device for removing sulfur oxides contained in the combustion exhaust gas from which heat is recovered by the heat recovery device 5 of the gas gas heater, and 7 is a sulfur oxidizer in the desulfurization device 6. The flue gas from which the matter has been removed Reheater of a gas-gas heater for re-heating by the heat recovered by the recovery unit 5, and 8 is a chimney for releasing the reheated flue gas in the reheater 7 gas-gas heater to the atmosphere.
【０００３】図２に示される従来のボイラ排煙処理設備
においては、ボイラ本体１で燃料の燃焼が行われて蒸気
が発生され、その際にボイラ本体１から排出される燃焼
排ガスは、脱硝装置２で窒素酸化物が除去され、空気予
熱器３でボイラ本体１へ供給される燃焼用空気等の空気
と熱交換して温度降下した後、電気集塵機４で灰が捕集
され、ガスガスヒータの熱回収器５で熱が回収され、脱
硫装置６で硫黄酸化物が除去され、ガスガスヒータの再
加熱器７において前記熱回収器５で回収した熱によって
再加熱され、煙突８から大気中へ放出されるようになっ
ている。In the conventional boiler flue gas treatment equipment shown in FIG. 2, fuel is burned in the boiler body 1 to generate steam, and the combustion exhaust gas discharged from the boiler body 1 at that time is supplied to a denitration device. 2, nitrogen oxides are removed, and the air preheater 3 exchanges heat with air such as combustion air supplied to the boiler body 1 to lower the temperature. The heat is recovered by the heat recovery unit 5, the sulfur oxide is removed by the desulfurization unit 6, the reheater 7 of the gas gas heater is reheated by the heat recovered by the heat recovery unit 5, and released to the atmosphere from the chimney 8. It is supposed to be.
【０００４】尚、前記脱硫装置６で硫黄酸化物が除去さ
れて排出される燃焼排ガスは、通常、およそ５０℃前後
まで温度降下し略飽和状態となっており、この脱硫後の
燃焼排ガスをそのまま煙突８から大気中へ放出すると、
白煙が発生するため、前記熱回収器５と再加熱器７とか
らなるガスガスヒータを用いて前記脱硫装置６から排出
される燃焼排ガスを再加熱するようになっている。[0004] The flue gas discharged from the desulfurization unit 6 from which sulfur oxides have been removed is generally saturated, with a temperature drop of about 50 ° C, and the flue gas after desulfurization is used as it is. When released from chimney 8 into the atmosphere,
Since white smoke is generated, the flue gas discharged from the desulfurization unit 6 is reheated by using a gas gas heater including the heat recovery unit 5 and the reheating unit 7.
【０００５】ところで、ボイラ本体１においてオリマル
ジョンや重質油等の燃料を燃焼させる場合、その燃焼排
ガス中には高濃度のＳＯ3ガスが含まれるため、腐食環
境の悪化等の問題がある。[0005] When burning fuel such as orimulsion or heavy oil in the boiler body 1, the combustion exhaust gas contains high-concentration SO 3 gas, and thus has a problem of deteriorating the corrosive environment.
【０００６】これに対応するため、従来においては、図
２に示されるように、電気集塵機４の上流側にアンモニ
ア（ＮＨ3）ガスを注入し、To cope with this, conventionally, as shown in FIG. 2, an ammonia (NH 3 ) gas is injected into the upstream side of the electric precipitator 4,
【化１】ＳＯ3＋２ＮＨ3＋Ｈ2Ｏ→（ＮＨ4）2ＳＯ4 という反応式の如くＳＯ3ガスを固形分である硫安と
し、電気集塵機４で捕集することにより、腐食環境の改
善を図ることが行われていた。As shown in a reaction formula of SO 3 + 2NH 3 + H 2 O → (NH 4 ) 2 SO 4, SO 3 gas is converted into solid ammonium sulfate and collected by an electric dust collector 4 to improve a corrosive environment. A plan was being made.
【０００７】しかしながら、前述の如く、電気集塵機４
の上流側にアンモニアガスを注入し、ＳＯ3ガスを固形
分である硫安とし、電気集塵機４で捕集するのでは、電
気集塵機４の捕集灰中にたくさんの硫安が含まれ、その
処理が難しいと共に、脱硫装置６から排出される排水中
に多量のアンモニウム塩が含まれ、その処理が難しくな
る一方、空気予熱器３の出口ガス温度を酸露点以上とす
る必要があり、ボイラ効率が低下し、更に空気予熱器３
の詰りも防止できないという欠点を有していた。However, as described above, the electric dust collector 4
Ammonia gas is injected into the upstream side of the furnace, SO 3 gas is converted into ammonium sulfate as a solid content, and collected by the electrostatic precipitator 4, the ash collected by the electric precipitator 4 contains a large amount of ammonium sulfate. In addition to the difficulty, the wastewater discharged from the desulfurization unit 6 contains a large amount of ammonium salt, which makes the treatment difficult. On the other hand, the gas temperature at the outlet of the air preheater 3 needs to be higher than the acid dew point, which lowers the boiler efficiency. And air preheater 3
Has the drawback that clogging cannot be prevented.
【０００８】尚、図２に示されるボイラ排煙処理設備に
おける電気集塵機４での操作温度は、およそ１６０〜１
７０℃前後である。The operating temperature of the electric precipitator 4 in the boiler flue gas treatment equipment shown in FIG.
It is around 70 ° C.
【０００９】そこで、こうした欠点を補うために、図３
に示されるように、空気予熱器３の上流側に中和剤（例
えば、炭酸カルシウム（ＣａＣＯ3）等）を注入し、Ｓ
Ｏ3を中和することにより、アンモニアによる弊害を防
止し且つ空気予熱器３の詰りを防止しつつ腐食環境の改
善を図ることが行われている。Therefore, in order to compensate for such a defect, FIG.
As shown in ( 2 ), a neutralizing agent (for example, calcium carbonate (CaCO 3 ) or the like) is injected into the upstream side of the air preheater 3, and S
By neutralizing O 3 , it is attempted to improve the corrosive environment while preventing the adverse effects of ammonia and preventing the air preheater 3 from being clogged.
【００１０】尚、通常、中和剤は反応に必要な量より多
めに入れる必要があり、この結果生ずる未反応の中和剤
は電気集塵機４で灰と共に捕集される。又、図３に示さ
れるボイラ排煙処理設備における電気集塵機４での操作
温度は、およそ１４０℃前後である。Usually, it is necessary to add a larger amount of neutralizing agent than necessary for the reaction, and the resulting unreacted neutralizing agent is collected together with the ash by the electrostatic precipitator 4. The operating temperature of the electric precipitator 4 in the boiler flue gas treatment facility shown in FIG. 3 is about 140 ° C.
【００１１】[0011]
【発明が解決しようとする課題】前述の如く、空気予熱
器３の上流側に中和剤を注入した場合、未反応の中和剤
を電気集塵機４で捕集する必要があるが、電気集塵機４
での操作温度は、図２より図３に示すものの方が若干低
くなってはいるものの、依然として高くなっている。As described above, when a neutralizing agent is injected upstream of the air preheater 3, the unreacted neutralizing agent needs to be collected by the electrostatic precipitator 4. 4
The operating temperature in FIG. 3 is slightly higher in FIG. 3 than in FIG. 2, but still high.
【００１２】このため、中和剤の電気抵抗値は、およそ
１０13〜１０14［Ω−ｃｍ］程度と非常に高く、電気集
塵機４において集塵極の表面にダストが付着して集塵極
がダストで覆われたときに、ダストが集塵極に吸着され
ずに集塵極から飛散してしまう、いわゆる逆電離現象が
発生しやすくなり、電気集塵機４の集塵面積を大きくす
る必要が生じ、又、処理ガス量も多く、これらの理由か
ら電気集塵機４の容積を大きくしなければならなくなる
という欠点を有していた。For this reason, the electric resistance value of the neutralizing agent is as high as about 10 13 to 10 14 [Ω-cm]. When covered with dust, the dust is scattered from the dust collecting electrode without being adsorbed to the dust collecting electrode, that is, the so-called reverse ionization phenomenon easily occurs, and it is necessary to increase the dust collecting area of the electric dust collector 4. In addition, the amount of gas to be processed is large, and the volume of the electric precipitator 4 must be increased for these reasons.
【００１３】本発明は、斯かる実情に鑑み、電気集塵機
での操作温度を低下させることができ、中和剤の電気抵
抗値を低下させ逆電離現象の発生を防止して電気集塵機
の集塵面積を削減し得ると共に、処理ガス量を低減させ
ることができ、電気集塵機の容積増大を防止し得るボイ
ラ排煙処理設備を提供しようとするものである。The present invention has been made in view of the above circumstances, and can reduce the operating temperature of an electrostatic precipitator, reduce the electric resistance of a neutralizing agent and prevent the occurrence of a reverse ionization phenomenon, and reduce the dust collection of the electric precipitator. An object of the present invention is to provide a boiler flue gas treatment facility capable of reducing the area, reducing the amount of processing gas, and preventing an increase in the volume of the electric dust collector.
【００１４】[0014]
【課題を解決するための手段】本発明は、ボイラ本体か
ら排出される燃焼排ガス中に含まれる窒素酸化物を除去
するための脱硝装置と、該脱硝装置で窒素酸化物が除去
された燃焼排ガスとボイラ本体へ供給される空気とを熱
交換させるための空気予熱器と、該空気予熱器を通過し
た燃焼排ガスから熱を回収するためのガスガスヒータの
熱回収器と、該熱回収器を通過した燃焼排ガス中に含ま
れる灰を捕集するための電気集塵機と、該電気集塵機で
灰が捕集された燃焼排ガス中に含まれる硫黄酸化物を除
去するための脱硫装置と、該脱硫装置で硫黄酸化物が除
去された燃焼排ガスを前記熱回収器で回収した熱によっ
て再加熱するためのガスガスヒータの再加熱器とを備
え、前記空気予熱器の上流側に中和剤を注入するよう構
成したことを特徴とするボイラ排煙処理設備にかかるも
のである。SUMMARY OF THE INVENTION The present invention provides a denitration apparatus for removing nitrogen oxides contained in flue gas discharged from a boiler body, and a flue gas from which nitrogen oxides have been removed by the denitration apparatus. An air preheater for exchanging heat with the air supplied to the boiler body, a heat recovery device of a gas gas heater for recovering heat from flue gas passing through the air preheater, and passing through the heat recovery device An electric precipitator for collecting ash contained in the flue gas, a desulfurizer for removing sulfur oxides contained in the flue gas from which ash has been collected by the electric precipitator, and a desulfurizer. A reheater of a gas gas heater for reheating the combustion exhaust gas from which the sulfur oxides have been removed by the heat recovered by the heat recovery device, wherein a neutralizing agent is injected upstream of the air preheater. The feature is that It relates to the boiler flue gas treatment facility that.
【００１５】上記手段によれば、以下のような作用が得
られる。According to the above means, the following effects can be obtained.
【００１６】本発明のボイラ排煙処理設備においては、
ボイラ本体で燃料の燃焼が行われて蒸気が発生され、そ
の際にボイラ本体から排出される燃焼排ガスは、脱硝装
置で窒素酸化物が除去され、空気予熱器でボイラ本体へ
供給される空気と熱交換し、ガスガスヒータの熱回収器
で熱が回収されて更に温度降下した後、電気集塵機で灰
が捕集され、脱硫装置で硫黄酸化物が除去され、ガスガ
スヒータの再加熱器において前記熱回収器で回収した熱
によって再加熱され大気中へ放出される。In the boiler flue gas treatment facility of the present invention,
The fuel is burned in the boiler body to generate steam, and the combustion exhaust gas discharged from the boiler body at that time is subjected to removal of nitrogen oxides by a denitration device, and air supplied to the boiler body by an air preheater. After heat exchange, the heat is recovered by the heat recovery unit of the gas gas heater and the temperature is further lowered, the ash is collected by the electric dust collector, the sulfur oxide is removed by the desulfurization device, and the heat is recovered by the reheater of the gas gas heater. It is reheated by the heat recovered by the recovery device and released into the atmosphere.
【００１７】ここで、前記空気予熱器の上流側にはＳＯ
3を中和するために中和剤が注入されるが、ガスガスヒ
ータの熱回収器を電気集塵機の上流側に設置したことに
より、電気集塵機での操作温度を、従来より低下させる
ことが可能となる。Here, SO is provided upstream of the air preheater.
A neutralizer is injected to neutralize 3 , but the heat recovery unit of the gas gas heater is installed upstream of the electric precipitator, which makes it possible to lower the operating temperature of the electric precipitator. Become.
【００１８】この結果、中和剤の電気抵抗値が低下し、
逆電離現象が発生しにくくなり、電気集塵機の集塵面積
を大きくしなくて済むと共に、処理ガス量が大幅に少な
くなり、電気集塵機の容積を小さくすることが可能とな
る。As a result, the electric resistance value of the neutralizing agent decreases,
The reverse ionization phenomenon is less likely to occur, so that the dust collecting area of the electric dust collector does not need to be increased, and the amount of processing gas is significantly reduced, so that the volume of the electric dust collector can be reduced.
【００１９】[0019]
【発明の実施の形態】以下、本発明の実施の形態を図示
例と共に説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００２０】図１は本発明を実施する形態の一例であっ
て、図中、図３と同一の符号を付した部分は同一物を表
わしており、基本的な構成は図３に示す従来のものと同
様であるが、本図示例の特徴とするところは、図１に示
す如く、電気集塵機４とガスガスヒータの熱回収器５と
の配列を逆にし、ガスガスヒータの熱回収器５を電気集
塵機４の上流側に設置した点にある。FIG. 1 shows an example of an embodiment of the present invention. In the figure, the portions denoted by the same reference numerals as those in FIG. 3 represent the same components, and the basic configuration is the same as that of the conventional device shown in FIG. The feature of this illustrated example is that the arrangement of the electric precipitator 4 and the heat recovery unit 5 of the gas gas heater is reversed as shown in FIG. The point is that it is installed on the upstream side of the dust collector 4.
【００２１】次に、上記図示例の作動を説明する。Next, the operation of the illustrated example will be described.
【００２２】図１に示すボイラ排煙処理設備において
は、ボイラ本体１で燃料の燃焼が行われて蒸気が発生さ
れ、その際にボイラ本体１から排出される燃焼排ガス
は、脱硝装置２で窒素酸化物が除去され、空気予熱器３
でボイラ本体１へ供給される燃焼用空気等の空気と熱交
換し、ガスガスヒータの熱回収器５で熱が回収されて更
に温度降下した後、電気集塵機４で灰が捕集され、脱硫
装置６で硫黄酸化物が除去され、ガスガスヒータの再加
熱器７において前記熱回収器５で回収した熱によって再
加熱され、煙突８から大気中へ放出される。In the boiler flue gas treatment equipment shown in FIG. 1, fuel is burned in the boiler main body 1 to generate steam. Oxide is removed and air preheater 3
Exchanges heat with air such as combustion air supplied to the boiler body 1, heat is recovered by a heat recovery unit 5 of a gas gas heater, and the temperature is further lowered. Then, ash is collected by an electric dust collector 4, and a desulfurization device is used. At 6, sulfur oxides are removed, reheated by the heat recovered by the heat recovery unit 5 in the reheater 7 of the gas gas heater, and released to the atmosphere from the chimney 8.
【００２３】ここで、前記空気予熱器３の上流側にはＳ
Ｏ3を中和するために中和剤が注入されるが、ガスガス
ヒータの熱回収器５を電気集塵機４の上流側に設置した
ことにより、電気集塵機４での操作温度は、およそ１０
０℃程度まで低下させることが可能となる。Here, S upstream of the air preheater 3
A neutralizing agent is injected to neutralize O 3. However, since the heat recovery unit 5 of the gas gas heater is installed on the upstream side of the electrostatic precipitator 4, the operating temperature of the electric precipitator 4 is about 10 ° C.
It is possible to lower the temperature to about 0 ° C.
【００２４】この結果、中和剤の電気抵抗値は、およそ
１０8〜１０9［Ω−ｃｍ］程度まで低下し、逆電離現象
が発生しにくくなり、電気集塵機４の集塵面積を大きく
しなくて済むと共に、処理ガス量が大幅に少なくなり、
電気集塵機４の容積を小さくすることが可能となる。As a result, the electric resistance of the neutralizing agent decreases to about 10 8 to 10 9 [Ω-cm], the reverse ionization phenomenon hardly occurs, and the dust collecting area of the electric dust collector 4 is increased. Not only is it unnecessary, but the amount of processing gas is greatly reduced,
The volume of the electric dust collector 4 can be reduced.
【００２５】こうして、電気集塵機４での操作温度を低
下させることができ、中和剤の電気抵抗値を低下させ逆
電離現象の発生を防止して電気集塵機４の集塵面積を削
減し得ると共に、処理ガス量を低減させることができ、
電気集塵機４の容積増大を防止し得る。In this manner, the operating temperature of the electric precipitator 4 can be reduced, the electric resistance value of the neutralizing agent can be reduced, the reverse ionization phenomenon can be prevented, and the dust collecting area of the electric precipitator 4 can be reduced. , Can reduce the amount of processing gas,
An increase in the volume of the electric dust collector 4 can be prevented.
【００２６】尚、本発明のボイラ排煙処理設備は、上述
の図示例にのみ限定されるものではなく、本発明の要旨
を逸脱しない範囲内において種々変更を加え得ることは
勿論である。Incidentally, the boiler flue gas treatment equipment of the present invention is not limited to the illustrated example described above, and it is a matter of course that various changes can be made without departing from the gist of the present invention.
【００２７】[0027]
【発明の効果】以上、説明したように本発明のボイラ排
煙処理設備によれば、電気集塵機での操作温度を低下さ
せることができ、中和剤の電気抵抗値を低下させ逆電離
現象の発生を防止して電気集塵機の集塵面積を削減し得
ると共に、処理ガス量を低減させることができ、電気集
塵機の容積増大を防止し得るという優れた効果を奏し得
る。As described above, according to the boiler flue gas treatment equipment of the present invention, the operating temperature of the electric precipitator can be lowered, the electric resistance value of the neutralizing agent is lowered, and the reverse ionization phenomenon is prevented. It is possible to reduce the dust collection area of the electric precipitator by preventing generation of the electric precipitator, reduce the amount of processing gas, and prevent an increase in the volume of the electric precipitator.
【図１】本発明を実施する形態の一例の概要構成図であ
る。FIG. 1 is a schematic configuration diagram of an example of an embodiment of the present invention.
【図２】従来例の概要構成図である。FIG. 2 is a schematic configuration diagram of a conventional example.
【図３】他の従来例の概要構成図である。FIG. 3 is a schematic configuration diagram of another conventional example.
１ ボイラ本体 ２ 脱硝装置 ３ 空気予熱器 ４ 電気集塵機 ５ 熱回収器 ６ 脱硫装置 ７ 再加熱器 REFERENCE SIGNS LIST 1 boiler main body 2 denitration device 3 air preheater 4 electric dust collector 5 heat recovery device 6 desulfurization device 7 reheater
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高西 一光 大阪府大阪市北区中之島三丁目３番22号 関西電力株式会社内 (72)発明者 山口 文彦 東京都江東区豊洲三丁目２番16号 石川島 播磨重工業株式会社豊洲総合事務所内 (72)発明者 難波 裕二 東京都江東区豊洲三丁目２番16号 石川島 播磨重工業株式会社豊洲総合事務所内 Ｆターム(参考） 4D002 AA02 AA12 BA03 BA06 BA12 BA14 CA01 CA13 CA20 DA05 DA16 DA70 EA02 GA03 GB03 GB20 HA05 HA07 HA08 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Ikko Konishi 3-2-2 Nakanoshima, Kita-ku, Osaka-shi, Osaka Inside Kansai Electric Power Company (72) Inventor Fumihiko Yamaguchi 3-2-2 Toyosu, Koto-ku, Tokyo No. 16 Ishikawajima Harima Heavy Industries, Ltd. Toyosu Sogo Office (72) Inventor Yuji Namba 3-2-16 Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Co., Ltd. Toyosu Sogo Office F-term (reference) 4D002 AA02 AA12 BA03 BA06 BA12 BA14 CA01 CA13 CA20 DA05 DA16 DA70 EA02 GA03 GB03 GB20 HA05 HA07 HA08
Claims (1)
に含まれる窒素酸化物を除去するための脱硝装置と、該
脱硝装置で窒素酸化物が除去された燃焼排ガスとボイラ
本体へ供給される空気とを熱交換させるための空気予熱
器と、該空気予熱器を通過した燃焼排ガスから熱を回収
するためのガスガスヒータの熱回収器と、該熱回収器を
通過した燃焼排ガス中に含まれる灰を捕集するための電
気集塵機と、該電気集塵機で灰が捕集された燃焼排ガス
中に含まれる硫黄酸化物を除去するための脱硫装置と、
該脱硫装置で硫黄酸化物が除去された燃焼排ガスを前記
熱回収器で回収した熱によって再加熱するためのガスガ
スヒータの再加熱器とを備え、前記空気予熱器の上流側
に中和剤を注入するよう構成したことを特徴とするボイ
ラ排煙処理設備。1. A denitration device for removing nitrogen oxides contained in flue gas discharged from a boiler body, a combustion exhaust gas from which nitrogen oxides have been removed by the denitration device, and air supplied to the boiler body. An air preheater for exchanging heat with the heat, a heat recovery device of a gas gas heater for recovering heat from the combustion exhaust gas passing through the air preheater, and ash contained in the combustion exhaust gas passing through the heat recovery device. An electrostatic precipitator for collecting the gas, and a desulfurization device for removing sulfur oxides contained in the combustion exhaust gas from which ash has been collected by the electric precipitator,
A reheater of a gas gas heater for reheating the flue gas from which the sulfur oxides have been removed by the desulfurization device by the heat recovered by the heat recovery device, and a neutralizing agent upstream of the air preheater. Boiler flue gas treatment equipment characterized by being configured to be injected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11178357A JP2001000833A (en) | 1999-06-24 | 1999-06-24 | Boiler flue gas treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11178357A JP2001000833A (en) | 1999-06-24 | 1999-06-24 | Boiler flue gas treatment equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001000833A true JP2001000833A (en) | 2001-01-09 |
Family
ID=16047086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11178357A Pending JP2001000833A (en) | 1999-06-24 | 1999-06-24 | Boiler flue gas treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001000833A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008078722A1 (en) * | 2006-12-27 | 2008-07-03 | Babcock-Hitachi Kabushiki Kaisha | Method and apparatus for treating discharge gas |
| WO2011064975A1 (en) | 2009-11-25 | 2011-06-03 | バブコック日立株式会社 | Exhaust gas treatment device for an oxygen combustion system |
| CN102489109A (en) * | 2011-12-09 | 2012-06-13 | 中电投远达环保工程有限公司 | Dry-type efficient and energy saving system for cleaning flue gas of multi-pollutants |
| JP2013506112A (en) * | 2009-09-25 | 2013-02-21 | アルストム テクノロジー リミテッド | Flue gas treatment and heat recovery system |
| CN109578967A (en) * | 2019-01-24 | 2019-04-05 | 浙江杭振锅炉有限公司 | A kind of combustion gas condensing steam boiler |
| CN110822418A (en) * | 2019-11-11 | 2020-02-21 | 新疆新能集团有限责任公司乌鲁木齐电力建设调试所 | Low temperature flue gas recirculation system and method for low NOX under low load of π-type boiler |
-
1999
- 1999-06-24 JP JP11178357A patent/JP2001000833A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008078722A1 (en) * | 2006-12-27 | 2008-07-03 | Babcock-Hitachi Kabushiki Kaisha | Method and apparatus for treating discharge gas |
| JPWO2008078722A1 (en) * | 2006-12-27 | 2010-04-22 | バブコック日立株式会社 | Exhaust gas treatment method and apparatus |
| US7833501B2 (en) | 2006-12-27 | 2010-11-16 | Babcock-Hitachi Kabushiki Kaisha | Method and apparatus for treating discharge gas |
| EP2127728A4 (en) * | 2006-12-27 | 2011-09-21 | Babcock Hitachi Kk | Method and apparatus for treating discharge gas |
| JP2013506112A (en) * | 2009-09-25 | 2013-02-21 | アルストム テクノロジー リミテッド | Flue gas treatment and heat recovery system |
| US9598742B2 (en) | 2009-09-25 | 2017-03-21 | Arvos Inc. | Exhaust processing and heat recovery system |
| WO2011064975A1 (en) | 2009-11-25 | 2011-06-03 | バブコック日立株式会社 | Exhaust gas treatment device for an oxygen combustion system |
| US8778041B2 (en) | 2009-11-25 | 2014-07-15 | Babcock-Hitachi Kabushiki Kaisha | Exhaust gas treatment device for an oxygen combustion system |
| CN102489109A (en) * | 2011-12-09 | 2012-06-13 | 中电投远达环保工程有限公司 | Dry-type efficient and energy saving system for cleaning flue gas of multi-pollutants |
| CN109578967A (en) * | 2019-01-24 | 2019-04-05 | 浙江杭振锅炉有限公司 | A kind of combustion gas condensing steam boiler |
| CN109578967B (en) * | 2019-01-24 | 2024-01-16 | 浙江杭振锅炉有限公司 | Gas condensing steam boiler |
| CN110822418A (en) * | 2019-11-11 | 2020-02-21 | 新疆新能集团有限责任公司乌鲁木齐电力建设调试所 | Low temperature flue gas recirculation system and method for low NOX under low load of π-type boiler |
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