JPS6324202B2 - - Google Patents
Info
- Publication number
- JPS6324202B2 JPS6324202B2 JP11395382A JP11395382A JPS6324202B2 JP S6324202 B2 JPS6324202 B2 JP S6324202B2 JP 11395382 A JP11395382 A JP 11395382A JP 11395382 A JP11395382 A JP 11395382A JP S6324202 B2 JPS6324202 B2 JP S6324202B2
- Authority
- JP
- Japan
- Prior art keywords
- damper
- boiler
- exhaust heat
- exhaust
- gas inlet
- 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
Links
- 238000011084 recovery Methods 0.000 claims description 6
- 238000013021 overheating Methods 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 17
- 239000002918 waste heat Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は誘引通風機によつて熱エネルギーを有
するガスを排出するプラントの排ガス煙道に、設
置された排熱回収ボイラの過熱に対する保護装置
に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a protection device against overheating of an exhaust heat recovery boiler installed in the exhaust gas flue of a plant that discharges gas having thermal energy by an induced draft fan. It is related to.
通常排熱を発生する側のプラントの経済的な重
要性から排熱回収ボイラの運転を停止する場合で
も排熱源のプラントは操業を継続したままであ
る。
Normally, due to the economic importance of the waste heat generating plant, even when the waste heat recovery boiler is shut down, the waste heat source plant continues to operate.
従つて従来、排熱ボイラの運転停止の際は、煙
道の排熱ボイラ上、下流側にダンパーを設け、完
全閉止して入熱を防止する構造になつている。 Therefore, conventionally, when the operation of the exhaust heat boiler is stopped, a damper is provided above and downstream of the exhaust heat boiler in the flue to completely close the damper and prevent heat input.
第１図，第２図は排熱回収部の機器構成を示
す。 Figures 1 and 2 show the equipment configuration of the exhaust heat recovery section.
排熱源１から排出された排ガス２はガス入口ダ
ンパー３より流入し、排熱ボイラ４で熱交換して
低温になり、ガス出口ダンパー６を経て、誘引通
風機７にて誘引、排出される。 Exhaust gas 2 discharged from the exhaust heat source 1 flows in through the gas inlet damper 3, exchanges heat with the exhaust heat boiler 4 to become low temperature, passes through the gas outlet damper 6, is induced by the induced draft fan 7, and is discharged.
また排熱ボイラ運転停止の際のバイパス回路と
してのバイパス煙道８及びバイパスダンパー９か
らなつている。 It also consists of a bypass flue 8 and a bypass damper 9 as a bypass circuit when the operation of the exhaust heat boiler is stopped.
給液５は排熱ボイラ４にて加熱され蒸気１０と
なつて蒸気供給先の装置へ供給される。 The feed liquid 5 is heated in the exhaust heat boiler 4, becomes steam 10, and is supplied to the device to which the steam is supplied.
何等かの原因で排熱ボイラ４の運転を停止する
場合にはバイパスダンパー９を全開した後、ガス
入口ダンパー３及びガス出口ダンパー６を全開す
る。 When the operation of the exhaust heat boiler 4 is to be stopped for some reason, the bypass damper 9 is fully opened, and then the gas inlet damper 3 and the gas outlet damper 6 are fully opened.
しかし、ガス入口ダンパー３及び出口ダンパー
６は寸法的に非常に大きいのが常であるため、製
作・組立公差や排ガスの熱によるダンパーや煙道
の変形を吸収するための裕度のために、完全に閉
止しても間隙が残り、排ガスの流入を止めるのは
非常に難しい。
However, since the gas inlet damper 3 and outlet damper 6 are usually very large in size, due to manufacturing/assembly tolerances and margins for absorbing deformation of the damper and flue due to exhaust gas heat, Even if it is completely closed, a gap remains, making it extremely difficult to stop the inflow of exhaust gas.
そのため、運転停止したはずの排熱ボイラ４が
尚も過熱され、給液５が蒸発し、ボイラ安全弁１
１の作動圧にまで達し、蒸気１０が系外に吹き出
したり、あるいは給液が供給されないため、ボイ
ラ内に液が無い状態で過熱される「空焚き」にな
る恐れがある。 As a result, the exhaust heat boiler 4, which should have stopped operating, is still overheated, the feed liquid 5 evaporates, and the boiler safety valve 1
1, the steam 10 may blow out of the system, or because no liquid is supplied, there is a risk that the boiler will be overheated without any liquid in it, resulting in "dry firing."
特に低沸点媒体を用いた排熱回収ボイラではこ
のような状況は絶対に避ける必要がある。 This situation must be avoided at all costs, especially in exhaust heat recovery boilers that use low boiling point media.
本発明の目的は、排熱ボイラの運転停止の際に
も確実に過熱を防止出来るようにした排熱ボイラ
の過熱防止装置を提供することにある。 An object of the present invention is to provide an overheating prevention device for a waste heat boiler that can reliably prevent overheating even when the operation of the waste heat boiler is stopped.
本発明は、入口ダンパー及び出口ダンパーの閉
止に連動して開く大気取入れ弁を排熱ボイラに設
けたことを特徴とする。
The present invention is characterized in that the exhaust heat boiler is provided with an air intake valve that opens in conjunction with the closing of the inlet damper and the outlet damper.
本発明の構成によれば、出口及び出口ダンパー
が閉じて排熱ボイラの運転が停止したとき、排熱
ボイラ内は大気取入れ弁を介して大気に連通され
るので、入口及び出口ダンパーのシールが不完全
であつても高温の排ガスがボイラ内に流入するこ
とがなく、ボイラの空焚きが防止できる。
According to the configuration of the present invention, when the outlet and outlet damper are closed and the operation of the waste heat boiler is stopped, the inside of the waste heat boiler is communicated with the atmosphere through the atmosphere intake valve, so that the seals of the inlet and outlet damper are sealed. Even if it is incomplete, high-temperature exhaust gas will not flow into the boiler, and dry heating of the boiler can be prevented.
第３図は本発明の一実施例を示したもので、排
熱ボイラ４の運転を停止する場合はバイパスダン
パー９を全開し、ガス入口ダンパー３及びガス出
口ダンパー６を閉止すると共に、排熱ボイラ４と
ガス入口ダンパー３間のボイラ入口煙道１２に設
置した大気取入れ弁１３を開放する。
FIG. 3 shows an embodiment of the present invention, in which when the operation of the exhaust heat boiler 4 is stopped, the bypass damper 9 is fully opened, the gas inlet damper 3 and the gas outlet damper 6 are closed, and the exhaust heat The air intake valve 13 installed in the boiler inlet flue 12 between the boiler 4 and the gas inlet damper 3 is opened.
煙道はすべて誘引通風機７により100〜200mmＨ
ｇの大気圧よりも低い圧力のため、大気取入り弁
１３を開放すると大気１４との差圧で大気１４が
ボイラ入口煙道１２に流入し、ガス入口ダンパー
３及び排熱ボイラ４・ガス出ダンパー６を通つ
て、バイパス煙道８からの排ガスと共に誘引通風
機７により誘引・排出される。 All flues are 100-200mmH by induced draft fan 7.
Since the pressure is lower than the atmospheric pressure of It passes through the damper 6 and is induced and discharged together with the exhaust gas from the bypass flue 8 by the induced draft fan 7.
大気取入れ弁１３はバタフライ弁・仕切弁方式
等形状を限定せず採用可能である。 The air intake valve 13 can be of any shape, such as a butterfly valve or a gate valve, without being limited in shape.
第４図は本発明の運転の要領の例を示すブロツ
ク線図である。 FIG. 4 is a block diagram showing an example of the operating procedure of the present invention.
ボイラ給液圧低下、制御系の故障、その他排熱
ボイラの停止要素信号ができると、蒸気供給先の
装置を停止させ、かつバイパスダンパー９全開、
ガス入出口ダンパー３及び６全閉及び大気取入れ
弁１３全開の動作をほぼ同時に行えるようにイン
ターロツクしてある。 When the boiler supply liquid pressure decreases, the control system malfunctions, or any other signal to stop the waste heat boiler is generated, the device to which the steam is supplied is stopped, and the bypass damper 9 is fully opened.
The gas inlet and outlet dampers 3 and 6 are interlocked so that they can be fully closed and the air intake valve 13 can be fully opened almost simultaneously.
以上の装置により、排熱ボイラの停止にもかか
わらず過熱現象で内圧が上昇し、ボイラ安全弁が
作動したり、空焚きを起すことを確実に防止でき
るという効果を奏する。
The above-mentioned device has the effect of reliably preventing the boiler safety valve from operating or dry firing due to an increase in internal pressure due to an overheating phenomenon even though the waste heat boiler is stopped.
第１図，第２図は本発明の対象となる基本的な
排熱回収部の機器構成及び従来技術の説明であ
り、第３図は本発明の実施例、第４図は本発明の
運転の要領の例を示したものである。
１……排熱源、３……ガス入口ダンパー、４…
…排熱ボイラ、６……ガス出口ダンパー、７……
誘引通風機、８……バイパス煙道、９……バイパ
スダンパー、１１……ボイラ安全弁、１２……ボ
イラ入口煙道、１３……大気取入弁。
Fig. 1 and Fig. 2 are explanations of the basic equipment configuration and conventional technology of the waste heat recovery section that is the object of the present invention, Fig. 3 is an embodiment of the present invention, and Fig. 4 is an explanation of the operation of the present invention. This is an example of how to do this. 1...Exhaust heat source, 3...Gas inlet damper, 4...
...Exhaust heat boiler, 6...Gas outlet damper, 7...
Induced draft fan, 8... Bypass flue, 9... Bypass damper, 11... Boiler safety valve, 12... Boiler inlet flue, 13... Atmospheric intake valve.
Claims (1)
スを排出するプラントの排ガス煙道に排熱エネル
ギー回収のための排熱ボイラと前記排熱ボイラの
排ガス入口側及び出口側にそれぞれガス入口ダン
パー及びガス出口ダンパーを備えた非熱回収ボイ
ラの過熱防止装置において、前記排熱ボイラに前
記ガス入口ダンパーが閉じたとき開いて大気を取
入れる大気取入れ弁を設けたことを特徴とする排
熱ボイラの過熱防止装置。1. An exhaust heat boiler for recovering exhaust heat energy is installed in the exhaust gas flue of a plant that exhausts gas having thermal energy by an induced draft fan, and a gas inlet damper and a gas inlet damper are installed on the exhaust gas inlet and outlet sides of the exhaust heat boiler, respectively. An overheating prevention device for a non-heat recovery boiler equipped with an outlet damper, characterized in that the exhaust heat boiler is provided with an air intake valve that opens when the gas inlet damper closes to take in the air. Prevention device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11395382A JPS597802A (en) | 1982-07-02 | 1982-07-02 | Preventive device for overheat of waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11395382A JPS597802A (en) | 1982-07-02 | 1982-07-02 | Preventive device for overheat of waste heat boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS597802A JPS597802A (en) | 1984-01-17 |
| JPS6324202B2 true JPS6324202B2 (en) | 1988-05-19 |
Family
ID=14625340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11395382A Granted JPS597802A (en) | 1982-07-02 | 1982-07-02 | Preventive device for overheat of waste heat boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS597802A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05262601A (en) * | 1992-03-21 | 1993-10-12 | Inoue Denki Kk | Chemical agent vaporizing material |
| JPH05262602A (en) * | 1992-03-21 | 1993-10-12 | Inoue Denki Kk | Chemical agent vaporing material and container for holding the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6472267B2 (en) * | 2015-02-20 | 2019-02-20 | 三菱重工業株式会社 | Economizer, composite boiler, and method of use |
-
1982
- 1982-07-02 JP JP11395382A patent/JPS597802A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05262601A (en) * | 1992-03-21 | 1993-10-12 | Inoue Denki Kk | Chemical agent vaporizing material |
| JPH05262602A (en) * | 1992-03-21 | 1993-10-12 | Inoue Denki Kk | Chemical agent vaporing material and container for holding the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS597802A (en) | 1984-01-17 |
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