JP3725862B2 - Boiler blow water treatment method for exhaust gas treatment system in waste melting treatment facility - Google Patents
Boiler blow water treatment method for exhaust gas treatment system in waste melting treatment facility Download PDFInfo
- Publication number
- JP3725862B2 JP3725862B2 JP2002356855A JP2002356855A JP3725862B2 JP 3725862 B2 JP3725862 B2 JP 3725862B2 JP 2002356855 A JP2002356855 A JP 2002356855A JP 2002356855 A JP2002356855 A JP 2002356855A JP 3725862 B2 JP3725862 B2 JP 3725862B2
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- JP
- Japan
- Prior art keywords
- boiler
- exhaust gas
- waste melting
- water
- treatment
- 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 - Fee Related
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- Chimneys And Flues (AREA)
- Incineration Of Waste (AREA)
- Gasification And Melting Of Waste (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は、廃棄物溶融処理設備の廃棄物溶融炉から排出する排ガス中の可燃分を燃焼室で燃焼させて得られた高温の燃焼ガスにより蒸気を発生させるボイラーを備えた排ガス処理系のボイラーブロー水処理方法に関する。
【0002】
【従来の技術】
廃棄物溶融処理設備では、廃棄物溶融炉から排出する排ガスから熱回収が行われている。図3は廃棄物溶融処理設備の排ガス処理系のフロー図である。図3において、廃棄物溶融炉1から排出される排ガスは、燃焼室2に導入され、排ガス中の可燃分を燃焼させ、発生した高温の燃焼ガスの熱を利用してボイラー3で蒸気を発生させて発電機で発電させる。ボイラー3を通過した後の排ガスは、排ガス冷却器4で排ガス温度を下げた後、集じん機5で集じんして煙突6から排出される。
【0003】
排ガス処理系のなかでボイラーは、長期間使用していると、ボイラの缶水が濃縮されてスケーリング等の障害が発生するので、水質維持のために定量的に発生蒸気量の2〜3%をブローすることが必要となる(特許文献1参照)。
【0004】
図2は従来のボイラーブロー水の処理を示すフロー図である。
【0005】
ボイラ3へ給水される水は、エコノマイザ7を通ってボイラー3の排ガスにより過熱されて気水胴8へと送られる。気水胴8内に貯められているボイラの缶水は、燃焼室2から送られてくる約900℃の燃焼ガスにより過熱され、蒸気管9内で飽和蒸気となり、さらに一次過熱器10、二次過熱器11を経て過熱蒸気となり、この過熱蒸気は、蒸気タービンの起動用あるいは空調設備の熱源として利用される。
【0006】
【特許文献1】
特開平8−47693号公報
【0007】
【発明が解決しようとする課題】
気水胴8からブロー配管12に抜き出されるブロー水(PH9.5〜11)は、高温(約225℃〜230℃)、高圧(約2.5Mpa)のため、専用のブロータンク13でフラッシュしたのち冷却し、冷却されたブロー水は排水処理配管14を経由して排水処理装置15に送られて排水処理され、ブロータンク13で発生する蒸気も換気ファン16で吸引し、換気配管17で系外処理される。このため、専用のブロータンク13、排水処理配管14、排水処理装置15、換気ファン16、換気配管17などのブロー水処理設備を設ける必要があるため、設備が複雑となり、設備費、建設費が高くなる。
【0008】
そこで、本発明は、廃棄物溶融処理設備における排ガス処理系において、ボイラブロー水を簡単な設備で処理できるボイラーブロー水処理方法を提供するものである。
【0009】
【課題を解決するための手段】
本発明の廃棄物溶融処理設備における排ガス処理系のボイラーブロー水処理方法は、廃棄物溶融処理設備の廃棄物溶融炉から排出する排ガス中の可燃分を燃焼室で燃焼した際の燃焼ガスにより蒸気を発生させるボイラーを備えた排ガス処理系において、気胴水からブロー配管を介して定量的に抜出すボイラーブロー水をボイラーブロー水が持つ圧力を利用して噴霧器から前記燃焼ガスに直接噴霧して蒸発処理することを特徴とする。
【0010】
ボイラーブロー水は、燃焼室またはボイラの放射伝熱部の燃焼ガスに噴霧して蒸発処理する。
【0011】
【発明の実施の形態】
図1は本発明のボイラーブロー水の処理を示すフロー図である。図2に示す従来のボイラーと同様に、ボイラ3へ給水される水は、エコノマイザ7を通ってボイラー3の排ガスにより過熱されて気水胴8へと送られる。気水胴8内に貯められているボイラの缶水は、燃焼室2から送られてくる約900℃の燃焼ガスにより過熱され、蒸気管9内で飽和蒸気となり、さらに一次過熱器10、二次過熱器11を経て過熱蒸気となり、この過熱蒸気は、蒸気タービンの起動用あるいは空調設備の熱源として利用される。
【0012】
気水胴8からブロー配管12を通って定量的に抜き出されるブロー水は、ブロー水が持つ高圧(約2.5Mpa)の圧力を利用して噴霧器18からボイラ3の放射伝熱部の、燃焼室2からの約900℃の高温の燃焼ガスに直接噴霧して蒸発処理する。
【0013】
本実施例では、ボイラー3の放射伝熱部で燃焼室2からの燃焼ガスにより蒸発処理しているが、図1の点線で示すように、燃焼室2に噴霧器18を設け、切替弁Mで切り換えて燃焼室2の燃焼ガスに噴霧して蒸発処理してもよい。
【0014】
なお、ブロー水を燃焼室またはボイラに噴霧することにより、燃焼室の燃焼ガスで熱置換する際のエネルギとなる、排ガス中の発熱量をブロー水で奪うことになるが、その量は総発熱量のごくわずかで有り、実状は問題ない。
【0015】
【発明の効果】
本発明では、ブロー水を燃焼室の燃焼ガスに噴霧して蒸発処理させることにより、従来のブロー水処理では必要であった、専用のブロータンク、フラッシュ装置、排水処理配管、排水処理装置、換気ファン、換気配管等のブロー水処理設備が不要となり、設備が簡素化され、建設費、設備費を低減させることができる。
【図面の簡単な説明】
【図1】 本発明のボイラーブロー水の処理を示すフロー図である。
【図2】 従来のボイラーブロー水の処理を示すフロー図である。
【図3】 廃棄物溶融処理設備の排ガス処理系のフロー図である。
【符号の説明】
1:廃棄物溶融炉 2:燃焼室 3:ボイラー 4:排ガス冷却器 5:集じん機 6:煙突 7:エコノマイザ 8:気水胴 9:蒸気管 10:一次過熱器 11:二次過熱器 12:ブロー配管 13:ブロータンク 14:排水処理配管 15: 排水処理装置 16:換気ファン 17:換気配管 18:噴霧器 M:切替弁[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a boiler for an exhaust gas treatment system including a boiler for generating steam by a high-temperature combustion gas obtained by burning a combustible component in exhaust gas discharged from a waste melting furnace of a waste melting treatment facility in a combustion chamber. The present invention relates to a blow water treatment method.
[0002]
[Prior art]
In the waste melting treatment facility, heat is recovered from the exhaust gas discharged from the waste melting furnace. FIG. 3 is a flowchart of the exhaust gas treatment system of the waste melting treatment facility. In FIG. 3, the exhaust gas discharged from the waste melting furnace 1 is introduced into the
[0003]
Boilers in the exhaust gas treatment system, when used for a long period of time, will condense boiler water and cause scaling and other obstacles. It is necessary to blow (see Patent Document 1).
[0004]
FIG. 2 is a flowchart showing the conventional boiler blow water treatment.
[0005]
The water supplied to the
[0006]
[Patent Document 1]
JP-A-8-47693
[Problems to be solved by the invention]
Blow water (PH 9.5 to 11) drawn out from the
[0008]
Therefore, the present invention provides a boiler blow water treatment method capable of treating boiler blow water with simple equipment in an exhaust gas treatment system in a waste melting treatment facility.
[0009]
[Means for Solving the Problems]
The boiler blow water treatment method of the exhaust gas treatment system in the waste melting treatment facility according to the present invention is a method in which the combustible component in the exhaust gas discharged from the waste melting furnace of the waste melting treatment facility is vaporized by the combustion gas when burned in the combustion chamber. In an exhaust gas treatment system equipped with a boiler that generates boilers, the boiler blow water that is quantitatively extracted from the barrel water through the blow pipe is sprayed directly onto the combustion gas from the sprayer using the pressure of the boiler blow water. It is characterized by evaporating.
[0010]
Boiler blow water is sprayed on the combustion gas in the radiant heat transfer section of the combustion chamber or boiler to evaporate.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a flowchart showing the treatment of boiler blow water of the present invention. Similarly to the conventional boiler shown in FIG. 2, the water supplied to the
[0012]
The blow water that is quantitatively extracted from the
[0013]
In this embodiment, although evaporated by the combustion gases from the
[0014]
In addition, by spraying blow water on the combustion chamber or boiler, the heat generated in the exhaust gas, which is the energy for heat substitution with the combustion gas in the combustion chamber, is taken away by the blow water. The amount is very small and there is no problem with the actual situation.
[0015]
【The invention's effect】
In the present invention, the blow water is sprayed on the combustion gas in the combustion chamber to evaporate it, so that it is necessary in the conventional blow water treatment, a dedicated blow tank, flush device, waste water treatment pipe, waste water treatment device, ventilation Blow water treatment facilities such as fans and ventilation pipes are not required, the facilities are simplified, and construction costs and facility costs can be reduced.
[Brief description of the drawings]
FIG. 1 is a flow diagram showing treatment of boiler blow water according to the present invention.
FIG. 2 is a flow diagram showing conventional boiler blow water treatment.
FIG. 3 is a flowchart of an exhaust gas treatment system of a waste melting treatment facility.
[Explanation of symbols]
1: Waste melting furnace 2: Combustion chamber 3: Boiler 4: Exhaust gas cooler 5: Dust collector 6: Chimney 7: Economizer 8: Vessel 9: Steam pipe 10: Primary superheater 11: Secondary superheater 12 : Blow piping 13: Blow tank 14: Waste water treatment piping 15: Waste water treatment equipment 16: Ventilation fan 17: Ventilation piping 18: Sprayer M : Switching valve
Claims (2)
Priority Applications (1)
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JP2002356855A JP3725862B2 (en) | 2002-12-09 | 2002-12-09 | Boiler blow water treatment method for exhaust gas treatment system in waste melting treatment facility |
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JP2002356855A JP3725862B2 (en) | 2002-12-09 | 2002-12-09 | Boiler blow water treatment method for exhaust gas treatment system in waste melting treatment facility |
Publications (2)
Publication Number | Publication Date |
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JP2004188267A JP2004188267A (en) | 2004-07-08 |
JP3725862B2 true JP3725862B2 (en) | 2005-12-14 |
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JP2002356855A Expired - Fee Related JP3725862B2 (en) | 2002-12-09 | 2002-12-09 | Boiler blow water treatment method for exhaust gas treatment system in waste melting treatment facility |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111664437A (en) * | 2019-03-07 | 2020-09-15 | 中石化广州工程有限公司 | Trickle disk type periodical pollution discharge flash tank |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005349299A (en) * | 2004-06-10 | 2005-12-22 | Mitsubishi Heavy Ind Ltd | Freshwater production apparatus |
CN104913323B (en) * | 2015-06-23 | 2017-11-10 | 丹东蓝天环保锅炉制造有限公司 | Gas cleaning and heat recovery boiler |
JP2017187267A (en) * | 2016-03-31 | 2017-10-12 | Jfeエンジニアリング株式会社 | Boiler anticorrosive device and anticorrosive method |
-
2002
- 2002-12-09 JP JP2002356855A patent/JP3725862B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111664437A (en) * | 2019-03-07 | 2020-09-15 | 中石化广州工程有限公司 | Trickle disk type periodical pollution discharge flash tank |
CN111664437B (en) * | 2019-03-07 | 2021-10-08 | 中石化广州工程有限公司 | Trickle disk type periodical pollution discharge flash tank |
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JP2004188267A (en) | 2004-07-08 |
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