JPH03230001A - Waste heat recovery boiler with built-in denitrification apparatus - Google Patents
Waste heat recovery boiler with built-in denitrification apparatusInfo
- Publication number
- JPH03230001A JPH03230001A JP2674490A JP2674490A JPH03230001A JP H03230001 A JPH03230001 A JP H03230001A JP 2674490 A JP2674490 A JP 2674490A JP 2674490 A JP2674490 A JP 2674490A JP H03230001 A JPH03230001 A JP H03230001A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- denitrification
- recovery boiler
- heat recovery
- boiler
- 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
- 238000011084 recovery Methods 0.000 title claims abstract description 30
- 239000002918 waste heat Substances 0.000 title abstract description 7
- 239000003054 catalyst Substances 0.000 claims abstract description 26
- 239000004071 soot Substances 0.000 claims abstract description 22
- 239000000428 dust Substances 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 abstract description 46
- 238000005192 partition Methods 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract 3
- 238000000034 method Methods 0.000 abstract 1
- 230000000452 restraining effect Effects 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/1869—Hot gas water tube boilers not provided for in F22B1/1807 - F22B1/1861
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/008—Adaptations for flue gas purification in steam generators
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、排熱回収などに適用される脱硝装置組み込み
排熱回収ボイラに係り、特に脱硝装置の圧力損失を改善
した脱硝装置組み込み排熱回収ボイラに関する。[Detailed Description of the Invention] Industrial Application Field The present invention relates to an exhaust heat recovery boiler with a built-in denitrification device that is applied to waste heat recovery, etc., and in particular to a waste heat recovery boiler with a built-in denitrification device that improves the pressure loss of the denitrification device. Regarding.
従来の技術
一般に、この種の排熱回収ボイラは、竪型に排ガスか流
れる構成とされている。 第３図は、このような排熱回
収ボイラの従来例を示したものである。2. Description of the Related Art In general, this type of exhaust heat recovery boiler has a configuration in which exhaust gas flows vertically. FIG. 3 shows a conventional example of such an exhaust heat recovery boiler.
第３図において、排熱回収ボイラ１は、最上部に設けら
れた排ガス人口部２と、下部に設けられた排ガス出口部
３とを有する。そして、排熱回収ボイラ１の内部には、
上部より順次、ボイラ１の伝熱管に付着したダスト等を
除去するスートブロワ４、高温用伝熱管５が配置されて
いる。また、この高温用伝熱管５の下方に隣接して脱硝
装置６が配置されている。脱硝装置６は、複数段に配置
された脱硝触媒層７より成る。さらに、脱硝装置６の下
方に、上部より順次、スートブロワ４、中温用伝熱管８
、スートブロワ４および低温用伝熱管９というように配
置されている。In FIG. 3, the exhaust heat recovery boiler 1 has an exhaust gas intake section 2 provided at the top and an exhaust gas outlet section 3 provided at the bottom. And inside the exhaust heat recovery boiler 1,
A soot blower 4 for removing dust and the like adhering to the heat exchanger tubes of the boiler 1 and a high temperature heat exchanger tube 5 are arranged in order from the top. Further, a denitrification device 6 is arranged below and adjacent to the high temperature heat exchanger tube 5. The denitrification device 6 consists of denitrification catalyst layers 7 arranged in multiple stages. Further, below the denitrification device 6, a soot blower 4 and a medium temperature heat exchanger tube 8 are installed in order from the top.
, soot blower 4 and low temperature heat exchanger tube 9.
また、脱硝装置６は、排ガスの温度によって、脱硝効率
が変化するため、必要に応じてその設置位置を中温用伝
熱管８の下流に配置することもある。Further, since the denitrification efficiency of the denitrification device 6 changes depending on the temperature of the exhaust gas, the installation position thereof may be placed downstream of the medium temperature heat exchanger tube 8 as necessary.
このような構成において、ボイラ１の伝熱管５、８．９
に排ガス中のダスト、または付着性を持つ成分等か経年
的に付着した場合、これらを除去するためにスートブロ
ワ４を使用する。このスートブロワ４は、伝熱管５．８
．９に付着した排ガス中のダストまたは付着性を持つ成
分を剥離飛散させるために、空気または蒸気を伝熱管に
向けて噴射させるものである。In such a configuration, the heat exchanger tubes 5, 8.9 of the boiler 1
If dust in the exhaust gas or components with adhesive properties have adhered to the exhaust gas over time, the soot blower 4 is used to remove them. This soot blower 4 has heat transfer tubes 5.8
．． Air or steam is injected toward the heat exchanger tubes in order to separate and scatter dust or adhesive components in the exhaust gas that have adhered to the heat exchanger tubes.
発明が解決しようとする課題
ところか、上述のように排熱回収ボイラ１の上方に設け
られた高温用伝熱管５に付着したダスト等の除去するた
めにスートブロワ４を使用した場合、これらの除去され
たダストおよび付着物が大きくて脱硝触媒層７の触媒孔
内を通過できないことがある。このため、脱硝装置６・
の脱硝触媒層７表面を、ダストおよび付着物か閉塞し、
脱硝触媒層の圧力損失か上昇する。Problems to be Solved by the Invention When the soot blower 4 is used to remove dust etc. attached to the high temperature heat exchanger tube 5 provided above the waste heat recovery boiler 1 as described above, it is difficult to remove these particles. The dust and deposits may be too large to pass through the catalyst pores of the denitrification catalyst layer 7. For this reason, the denitration equipment 6.
The surface of the denitrification catalyst layer 7 is blocked by dust and deposits,
Pressure loss in the denitrification catalyst layer increases.
本発明は、このような事情に鑑みてなされたもので、伝
熱管にスートブロワを実施した場合に、脱硝触媒層表面
に除去されたダスト等が堆積し、脱硝触媒層が閉塞され
ることを防止し、脱硝触媒層の圧力損失の上昇を抑える
ことができる脱硝装置組み込み排熱回収ボイラを提供す
ることを目的とする。The present invention has been made in view of the above circumstances, and is intended to prevent the removed dust etc. from accumulating on the surface of the denitrification catalyst layer and clogging the denitrification catalyst layer when a soot blower is installed in the heat transfer tube. However, an object of the present invention is to provide an exhaust heat recovery boiler incorporating a denitrification device that can suppress an increase in pressure loss in the denitrification catalyst layer.
課題を解決するための手段
本発明は、前記の目的を達成するために、ボイラ内部の
排ガス流路中に、複数の伝熱管と、これらの伝熱管に付
着したダスト等を除去する複数のスートブロワと、脱硝
触媒層を有する脱硝装置とを配置してなる排熱回収ボイ
ラにおいて、ボイラ内部の排ガス流路の形状を逆Ｕ字型
に構成し、この逆Ｕ字型の排熱回収ボイラ内の最上部に
脱硝装置を配置したものである。Means for Solving the Problems In order to achieve the above object, the present invention provides a plurality of heat transfer tubes and a plurality of soot blowers for removing dust etc. attached to these heat transfer tubes in an exhaust gas flow path inside a boiler. In an exhaust heat recovery boiler configured with a denitrification device having a denitrification catalyst layer and a denitrification device having a denitrification catalyst layer, the shape of the exhaust gas flow path inside the boiler is configured in an inverted U shape. A denitrification device is placed at the top.
作用
上記の手段によると、排熱回収ボイラの排ガス流路形状
を逆Ｕ字型に構成し、この逆Ｕ字型の排熱回収ボイラ内
の最上部に脱硝装置を配置したので、伝熱管用スートブ
ロワの使用時、伝熱管から飛散したダスト等か脱硝触媒
層表面へ堆積せす、脱硝触媒層が閉塞するを防止するこ
とができる。Effect According to the above means, the exhaust gas flow path of the waste heat recovery boiler is configured in an inverted U-shape, and the denitrification device is placed at the top of the inverted U-shaped waste heat recovery boiler. When the soot blower is used, it is possible to prevent dust scattered from the heat exchanger tubes from accumulating on the surface of the denitrification catalyst layer and from clogging the denitrification catalyst layer.
実施例
以下、本発明の実施例を第１図および第２図を参照して
説明する。Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2.
第１図は第１実施例を示し、排熱回収ボイラ２１は、水
平に配置された図示しないガスダクトに接続される排ガ
ス入口部２２と、排ガス出口部２３とを下部に有する。FIG. 1 shows a first embodiment, in which an exhaust heat recovery boiler 21 has an exhaust gas inlet section 22 and an exhaust gas outlet section 23 in its lower part, which are connected to a horizontally arranged gas duct (not shown).
そして、この排熱回収ボイラ２１は内部を中央で区切る
仕切板２４によって、逆Ｕ字型の排ガス流路を形成して
いる。このため、排熱回収ボイラ２１内の上部は、排ガ
スが迂回する流路となっており、排ガス入口部２２より
上部までは排ガスは上昇流となり、上部より排ガス出口
部２３までは下降流となっている。The exhaust heat recovery boiler 21 forms an inverted U-shaped exhaust gas flow path by a partition plate 24 that partitions the inside of the boiler 21 at the center. Therefore, the upper part of the exhaust heat recovery boiler 21 is a flow path through which the exhaust gas detours, and the exhaust gas flows upward from the exhaust gas inlet part 22 to the upper part, and flows downward from the upper part to the exhaust gas outlet part 23. ing.
そして、この排ガス上昇流部の最上部に複数の脱硝触媒
層２５より成る脱硝装置２６を配置し、その下部に高温
用伝熱管２７を配置する。また、この高温用伝熱管２７
の上流側および下流側には、複数個のスートブロワ２８
を設ける。さらに、この排熱回収ボイラ２１の排ガス下
降流部に４よ、上部より順次、中温用伝熱管２９と、低
温用伝熱管３０とか配置されるとともに、それぞれの伝
熱管２９．３０の上流側および下流側には、複数個のス
ートブロワ２８が設けられている。A denitrification device 26 comprising a plurality of denitrification catalyst layers 25 is placed at the top of this exhaust gas upward flow section, and a high temperature heat exchanger tube 27 is placed below it. In addition, this high temperature heat exchanger tube 27
A plurality of soot blowers 28 are installed on the upstream and downstream sides of the
will be established. Further, in the exhaust gas downstream part of the exhaust heat recovery boiler 21, medium temperature heat exchanger tubes 29 and low temperature heat exchanger tubes 30 are arranged sequentially from the upper part, and the upstream side of each heat exchanger tube 29,30 and the A plurality of soot blowers 28 are provided on the downstream side.
このような本実施例の構成において、各伝熱管２７．２
９．３０に排ガス中のダスト、または付着性を持つ成分
等が経年的に付着した場合、これらを除去するためにス
ートブロワ２８を使用する。すると、スートブロワ２８
により剥離し、飛散したダスト、または付着性を持つ成
分は、重力により落下する。In the configuration of this embodiment, each heat exchanger tube 27.2
9.30, if dust or adhesive components in the exhaust gas adhere over time, the soot blower 28 is used to remove them. Then, the soot blower 28
The dust or adhesive components that are peeled off and scattered fall down due to gravity.
この際、脱硝装置２６が最上部に位置するため、その脱
硝触媒層２５の表面に剥離、飛散したダスト、または付
着性を持つ成分物が堆積することはない。At this time, since the denitrification device 26 is located at the top, no peeled or scattered dust or adhesive components are deposited on the surface of the denitrification catalyst layer 25.
したがって、本実施例によると、排熱回収ボイラ２１の
排ガス流路形状を逆Ｕ字型に構成し、この逆Ｕ字型の排
熱回収ボイラ内の最上部に脱硝装置２６を配置したので
、伝熱管用スートブロワ２８の使用時、伝熱管から飛散
したダスト等が脱硝触媒層２５の表面へ堆積せず、脱硝
触媒層２５が閉塞するすることを防止することができる
。Therefore, according to this embodiment, the exhaust gas flow path of the exhaust heat recovery boiler 21 is configured in an inverted U-shape, and the denitrification device 26 is disposed at the top of the inverted U-shaped exhaust heat recovery boiler. When the soot blower 28 for heat transfer tubes is used, dust etc. scattered from the heat transfer tubes do not accumulate on the surface of the denitration catalyst layer 25, and the denitration catalyst layer 25 can be prevented from being clogged.
なお、排ガスが高温用伝熱管２７にて熱交換された後、
ガス温度が比較的高温で脱硝適用範囲とならない場合、
第２図に示す他の実施例を適用してもよい。In addition, after the exhaust gas is heat exchanged in the high temperature heat exchanger tube 27,
When the gas temperature is relatively high and does not fall within the applicable range of denitrification,
Other embodiments shown in FIG. 2 may also be applied.
第２図において、排熱回収ボイラ３１は、水平に配置さ
れた図示しないガスダクトに接続される排ガス人口部３
２と、排ガス出口部３３とを下部に有する。そして、こ
の排熱回収ボイラ３１は内部を中央で区切る仕切板３４
によって、逆Ｕ字型の排ガス流路を形成している。この
ため、排熱回収ボイラ３１内の上部は、排ガスが迂回す
る流路となっており、排ガス入口部３２より上部までは
排ガスは上昇流となり、上部より排ガス出口部３３まで
は下降流となっている。In FIG. 2, the exhaust heat recovery boiler 31 is connected to a horizontally arranged gas duct (not shown).
2 and an exhaust gas outlet section 33 at the bottom. This exhaust heat recovery boiler 31 has a partition plate 34 that divides the interior in the center.
This forms an inverted U-shaped exhaust gas flow path. Therefore, the upper part of the exhaust heat recovery boiler 31 is a flow path through which the exhaust gas detours, and the exhaust gas flows upward from the exhaust gas inlet part 32 to the upper part, and flows downward from the upper part to the exhaust gas outlet part 33. ing.
そして、この排ガス下降流部の最上部に複数の脱硝触媒
層３５より成る脱硝装置３６を設け、その下部に低温用
伝熱管４０を配置する。そして、この低温用伝熱管４０
の上流側および下流側には、複数個のスートブロワ３８
を設ける。さらに、この排熱回収ボイラ３１の排ガス上
昇流部には、上部より順次、中温用伝熱管３９と、高温
用伝熱管３７とが配置されているとともに、それぞれの
伝熱管３９．３７の上流側および下流側には、複数個の
スートブロワ３８が設けられている。A denitrification device 36 comprising a plurality of denitrification catalyst layers 35 is provided at the top of this exhaust gas downward flow section, and a low-temperature heat exchanger tube 40 is placed below it. And this low temperature heat exchanger tube 40
A plurality of soot blowers 38 are provided on the upstream and downstream sides of the
will be established. Further, in the exhaust gas upward flow section of the exhaust heat recovery boiler 31, a medium temperature heat exchanger tube 39 and a high temperature heat exchanger tube 37 are arranged in order from the upper part, and the upstream side of each heat exchanger tube 39. A plurality of soot blowers 38 are provided on the downstream side.
なお、この構成は、排ガスの上昇流部に中温用伝熱管３
９および高温用伝熱管３７が配置され、排ガスが熱交換
された後、その温度が脱硝適用範囲となって、反対側の
下降流部に設けた脱硝装置３６に導入されるような構成
となっている。Note that this configuration has a medium temperature heat exchanger tube 3 in the ascending flow part of the exhaust gas.
9 and a high-temperature heat transfer tube 37 are arranged, and after the exhaust gas is heat exchanged, its temperature becomes the denitrification applicable range and is introduced into the denitrification device 36 provided in the downflow section on the opposite side. ing.
このような構成においても、第１図に示した構成と同様
の作用効果が得られる。Even in such a configuration, the same effects as the configuration shown in FIG. 1 can be obtained.
発明の効果
以上述べたように、本発明によれば、排熱回収ボイラの
排ガス流路形状を逆Ｕ字型に構成し、この逆Ｕ字型の排
熱回収ボイラ内の最上部に脱硝装置を配置したので、伝
熱管用スートブロワの使用時、伝熱管から飛散したダス
ト等が脱硝触媒層表面へ堆積せず、脱硝触媒層の閉塞防
止が可能となり、脱硝触媒層の圧力損失の上昇を抑える
ことができる等の効果が奏される。Effects of the Invention As described above, according to the present invention, the exhaust gas flow path of the exhaust heat recovery boiler is configured in an inverted U-shape, and the denitrification device is installed at the top of the inverted U-shaped exhaust heat recovery boiler. Because of this arrangement, when using the soot blower for heat transfer tubes, dust etc. scattered from the heat transfer tubes will not accumulate on the surface of the denitrification catalyst layer, making it possible to prevent clogging of the denitrification catalyst layer and suppressing the increase in pressure loss in the denitrification catalyst layer. Effects such as being able to do the following can be achieved.
第１図は本発明の一実施例の構成を示す側断面図、第２
図は本発明の他の実施例の構成を示す側断面図、第３図
は従来例を示す側断面図である。
２１．３１・・排熱回収ボイラ、２２．３２・・排ガス
人口部、２３．３３・・排ガス出口部、２４．３４・・
仕切板、２５．３５・・脱硝触媒層、２６．３６・・脱
硝装置、２７，３７・・高温用伝熱管、２８．３８・・
スートブロワ、２９３９・・中温用伝熱管、３０．４０
・・高温用伝熱管。FIG. 1 is a side sectional view showing the configuration of an embodiment of the present invention, and FIG.
The figure is a side sectional view showing the structure of another embodiment of the present invention, and FIG. 3 is a side sectional view showing the conventional example. 21.31...Exhaust heat recovery boiler, 22.32...Exhaust gas intake section, 23.33...Exhaust gas outlet section, 24.34...
Partition plate, 25.35... Denitrification catalyst layer, 26.36... Denitrification device, 27, 37... High temperature heat exchanger tube, 28.38...
Soot blower, 2939...Medium temperature heat transfer tube, 30.40
...Heat transfer tube for high temperature.
Claims (1)
の伝熱管に付着したダスト等を除去する複数のスートブ
ロワと、脱硝触媒層を有する脱硝装置とを配置してなる
排熱回収ボイラにおいて、ボイラ内部の排ガス流路の形
状を逆Ｕ字型に構成し、この逆Ｕ字型の排熱回収ボイラ
内の最上部に脱硝装置を配置してなることを特徴とする
脱硝装置組み込み排熱回収ボイラ。In an exhaust heat recovery boiler in which a plurality of heat exchanger tubes, a plurality of soot blowers for removing dust etc. attached to these heat exchanger tubes, and a denitrification device having a denitrification catalyst layer are arranged in an exhaust gas flow path inside the boiler. , the exhaust gas flow path inside the boiler is configured in an inverted U-shape, and the denitrification device is placed at the top of the inverted U-shaped exhaust heat recovery boiler. recovery boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2674490A JPH03230001A (en) | 1990-02-06 | 1990-02-06 | Waste heat recovery boiler with built-in denitrification apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2674490A JPH03230001A (en) | 1990-02-06 | 1990-02-06 | Waste heat recovery boiler with built-in denitrification apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03230001A true JPH03230001A (en) | 1991-10-14 |
Family
ID=12201811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2674490A Pending JPH03230001A (en) | 1990-02-06 | 1990-02-06 | Waste heat recovery boiler with built-in denitrification apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03230001A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100500697B1 (en) * | 2002-10-21 | 2005-07-12 | 한국에너지기술연구원 | A multi-stage heat recovery system with the water-fluidized-bed heat exchanger |
| KR100701577B1 (en) * | 2006-09-13 | 2007-03-29 | 권오덕 | Heat exchanger system |
| KR101160815B1 (en) * | 2009-12-30 | 2012-06-29 | 지에스파워주식회사 | Waste Heat Recovery System |
-
1990
- 1990-02-06 JP JP2674490A patent/JPH03230001A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100500697B1 (en) * | 2002-10-21 | 2005-07-12 | 한국에너지기술연구원 | A multi-stage heat recovery system with the water-fluidized-bed heat exchanger |
| KR100701577B1 (en) * | 2006-09-13 | 2007-03-29 | 권오덕 | Heat exchanger system |
| KR101160815B1 (en) * | 2009-12-30 | 2012-06-29 | 지에스파워주식회사 | Waste Heat Recovery System |
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