JPH04100990A - Detection of clogging of smelt spout in soda-recovering boiler - Google Patents
Detection of clogging of smelt spout in soda-recovering boilerInfo
- Publication number
- JPH04100990A JPH04100990A JP20965490A JP20965490A JPH04100990A JP H04100990 A JPH04100990 A JP H04100990A JP 20965490 A JP20965490 A JP 20965490A JP 20965490 A JP20965490 A JP 20965490A JP H04100990 A JPH04100990 A JP H04100990A
- Authority
- JP
- Japan
- Prior art keywords
- smelt
- spout
- smelt spout
- clogging
- soda
- 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
- 241001062472 Stokellia anisodon Species 0.000 title claims abstract description 62
- 238000001514 detection method Methods 0.000 title abstract 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 208000037805 labour Diseases 0.000 abstract 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000010411 cooking Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Paper (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はソーダ回収ボイラーのスメルトスパウトの閉塞
検知方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for detecting blockage of a smelt spout in a soda recovery boiler.
クラフトパルプ工程からの黒液は、ソーダ回収ボイラー
において燃焼され、その際、蒸解薬品は炭酸ナトリウム
と硫化ナトリウムに変換される。この時、溶融した炭酸
ナトリウムや硫化ナトリウムを含むスメルトは、炉底で
チャーベットを形成し、その後スメルトスパウトを通し
てデイゾルピングタンク内へ流出される。ここで、スメ
ルトスパウトはボイラーの炉底で生成した溶融スメルト
をデイゾルピングタンク内へ流出させる通路の作用を行
う。Black liquor from the kraft pulping process is combusted in a soda recovery boiler, where the cooking chemicals are converted to sodium carbonate and sodium sulfide. At this time, the smelt containing molten sodium carbonate and sodium sulfide forms a charbet at the bottom of the furnace, and then flows out into the dissolping tank through the smelt spout. Here, the smelt spout acts as a passage through which the molten smelt generated at the bottom of the boiler flows out into the dissolping tank.
一般的なスメルトスパウトは第３図斜視図に示すように
、ボイラー炉壁１から図示省略のデイヅルビングタンク
の上方に配設された低合金鋼製でＵ字型断面を有する長
尺とい３であり、スメルト４の接触によって腐食しない
ようにスメルトが接触する内面下部にはフェライト系高
クロム鋼による肉盛り部５がある。As shown in the perspective view of Fig. 3, a typical smelt spout is a long gutter 3 made of low-alloy steel and having a U-shaped cross section, which is disposed from the boiler furnace wall 1 to above a dedubbing tank (not shown). In order to prevent corrosion due to contact with the smelt 4, there is a built-up portion 5 made of ferritic high chromium steel at the lower part of the inner surface where the smelt comes into contact.
また、低合金鋼３で構成されたＵ字型の内部空間には冷
却水が流され、スメルトと接触する部分のメタル表面温
度が約５００℃になるように調節されている。Further, cooling water is flowed into the U-shaped interior space made of low alloy steel 3, and the temperature of the metal surface in the portion that comes into contact with the smelt is adjusted to about 500°C.
このようなスメルトスパウト２においては、スメルトの
冷却・固化や大境状スメルトの混入等様々な要因でスメ
ルトか定常的に流れにくくなることがある。更にこの状
況か進行し、スメルトが完全に流れなくなると、炉内の
チャーベットレベルは上昇し、燻焼は不安定になり、ひ
いては蒸発管の損傷を引き起こすことになるので、スメ
ルトスパウト２上のスメルト４の定常的な流れを常に維
持することは重要である。In such a smelt spout 2, it may become difficult for the smelt to flow steadily due to various factors such as cooling and solidification of the smelt, and inclusion of large boundary smelt. If this situation progresses further and the smelt stops flowing completely, the charbet level in the furnace will rise, the smoking will become unstable, and the evaporator tube will be damaged. It is important to maintain a steady flow of smelt 4 at all times.
このため、従来はスメルトスパウト２上面を監視カメラ
６で監視し、ボイラーの中央操作室に備えられたモニタ
ーテレビ７によって常時観察し必要に応じてスメルトス
パウト２の清掃を行っている。For this reason, conventionally, the upper surface of the smelt spout 2 is monitored by a surveillance camera 6, and the smelt spout 2 is constantly observed by a monitor television 7 provided in the central control room of the boiler, and the smelt spout 2 is cleaned as necessary.
しかしながら、このような手段では、ビデオカメラやモ
ニターテレビによる監視装置を使用しているので、監視
員が常時モニターテレビの前に陣取って、スメルトスパ
ウト上のスメルト流れを監視しなければならない。However, since such a method uses a monitoring device such as a video camera or a television monitor, an observer must always be stationed in front of the television monitor to monitor the flow of smelt on the smelt spout.
本発明はこのような事情に鑑みて提案されたもので、省
人省力的にスメルトスパウトの閉塞の有無を検出する経
済的なソーダ回収ボイラーのスメルトスパウトの閉塞検
出方法を提供することを目的とする。The present invention was proposed in view of the above circumstances, and an object of the present invention is to provide an economical method for detecting blockage of a smelt spout in a soda recovery boiler that saves manpower and labor. do.
そのために本発明は、ソーダ回収ボイラーにおけるスメ
ルトスパウトのスメルト流路に熱電対を取付け、その部
分のスメルトの温度変化を検出して警報を発するように
したことを特徴とする。To this end, the present invention is characterized in that a thermocouple is attached to the smelt flow path of the smelt spout in the soda recovery boiler, and a temperature change in the smelt in that area is detected and an alarm is issued.
このような構成によれば、スメルトスパウトのスメルト
流路近傍に熱電対を付設し、スメルトスパウトが閉塞し
てスメルトが流れなくなった場合に生じるスメルトスパ
ウトの温度低下を検出して、スメルトスパウト閉塞の有
無を検知することができる。According to such a configuration, a thermocouple is attached near the smelt flow path of the smelt spout to detect a temperature drop in the smelt spout that occurs when the smelt spout is blocked and smelt no longer flows, and to prevent the smelt spout from being blocked. The presence or absence can be detected.
本発明の一実施例を図面について説明すると、第１図は
スメルトスパウト閉塞の検知手段である熱電対の取付は
状況を示す斜視図、第２図は第１図のｎ−ｎ断面図であ
る。One embodiment of the present invention will be explained with reference to the drawings. Fig. 1 is a perspective view showing the installation of a thermocouple, which is a means for detecting smelt spout blockage, and Fig. 2 is a sectional view taken along line nn in Fig. 1. .
上図において、スメルトスパウト１１は、低合金鋼で構
成されたＵ字型断面を有するとい１２と該Ｕ字型長尺と
いの内面下部に施工されたフェライト系高クロム鋼の肉
盛り部１３からなる。In the above figure, the smelt spout 11 is formed from a groove 12 having a U-shaped cross section made of low alloy steel and a built-up part 13 of ferritic high chromium steel constructed on the lower inner surface of the U-shaped elongated groove. Become.
このような構成のもとで通常スメルト１４は、肉盛り部
１３を流れ、長尺とい１２は二重構造になっており、そ
の内部空間１５を冷却水か流れてスメルトスパウト１１
全体の温度上昇を抑えている。Under such a configuration, the smelt 14 normally flows through the built-up part 13, and the elongated grate 12 has a double structure, and cooling water flows through the internal space 15 of the elongated grate 12 to form the smelt spout 11.
This suppresses the overall temperature rise.
通常、スメルトスパウト１１のメタル温度は、スメルト
１４との接触部１１ａにおいて、約５００℃になるよう
に調節されている。Normally, the metal temperature of the smelt spout 11 is adjusted to about 500° C. at the contact portion 11a with the smelt 14.
このようなスメルトスパウト１１において、あらかじめ
スメルト流路下部に熱電対１６例えばにタイプをスポッ
ト溶接しておくと、スメルト１４が定常的に流れている
ときは約５００℃の指示温度が温度記録計１７に表示さ
れる。In such a smelt spout 11, if a type of thermocouple 16, for example, is spot-welded to the lower part of the smelt flow path in advance, when the smelt 14 is flowing steadily, an indicated temperature of about 500°C will be detected by the temperature recorder 17. will be displayed.
ところが、スメルトスパウト１１が閉塞してスメルト１
４が流れなくなると、スメルトスパウトの温度は低下し
、温度記録計１７の温度が低下する。However, the smelt spout 11 was blocked and the smelt 1
4 stops flowing, the temperature of the smelt spout decreases, and the temperature of the temperature recorder 17 decreases.
従来のスメルトスパウト閉塞の有無を検知する手段は、
監視カメラとテレビモニターの組合せであったため、常
時ボイラーの運転員等が監視しておく必要かあった。Conventional means of detecting the presence or absence of smelt spout blockage are as follows:
Since it was a combination of surveillance cameras and television monitors, it was necessary for boiler operators to constantly monitor the situation.
これに対し、本発明のスメルトスパウト閉塞の有無を検
知する手段は、スメルト流路近傍の温度を熱電対を用い
て電気的に検出するため、スメルトスパウトの状態を連
続的に記録できるとともに、警報設定を行うことによっ
て、スメルトスパウトが閉塞したときに警報を発生させ
ることが容易であり、監視員が常時目を凝らして監視し
ておく必要がなくなる。On the other hand, the means for detecting the presence or absence of smelt spout blockage according to the present invention uses a thermocouple to electrically detect the temperature near the smelt flow path, so it is possible to continuously record the state of the smelt spout and also to issue an alarm. By making the settings, it is easy to generate an alarm when the smelt spout is blocked, and there is no need for the supervisor to constantly monitor the situation.
要するに本発明によれば、ソーダ回収ボイラーにおける
スメルトスパウトのスメルト流路に熱電対を取付け、そ
の部分のスメルトの温度変化を検出して警報を発するよ
うにしたことによリ、省人省力的にスメルトスパウトの
閉塞の有無を検出する経済的なソーダ回収ボイラーのス
メルトスパウトの閉塞検出方法を得るから、本発明は産
業上極めて有益なものである。In short, according to the present invention, a thermocouple is attached to the smelt flow path of the smelt spout in a soda recovery boiler, and a temperature change in the smelt in that area is detected and an alarm is issued, thereby saving manpower and labor. The present invention is industrially extremely useful because it provides an economical method for detecting blockage of a smelt spout in a soda recovery boiler.
第１図は本発明の一実施例を示す斜視図、第２図は第１
図のｍ−ｎ断面図である。
第３図は公知の一般的なスメルトスパウトを示す斜視図
である。FIG. 1 is a perspective view showing one embodiment of the present invention, and FIG. 2 is a perspective view showing one embodiment of the present invention.
It is a sectional view taken along the line mn in the figure. FIG. 3 is a perspective view of a known general smelt spout.
Claims (1)
ト流路に熱電対を取付け、その部分のスメルトの温度変
化を検出して警報を発するようにしたことを特徴とする
ソーダ回収ボイラーのスメルトスパウトの閉塞検知方法
。A method for detecting blockage of a smelt spout in a soda recovery boiler, characterized in that a thermocouple is attached to the smelt flow path of the smelt spout in the soda recovery boiler, and a temperature change in the smelt in that area is detected and an alarm is issued.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20965490A JPH04100990A (en) | 1990-08-08 | 1990-08-08 | Detection of clogging of smelt spout in soda-recovering boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20965490A JPH04100990A (en) | 1990-08-08 | 1990-08-08 | Detection of clogging of smelt spout in soda-recovering boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04100990A true JPH04100990A (en) | 1992-04-02 |
Family
ID=16576388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20965490A Pending JPH04100990A (en) | 1990-08-08 | 1990-08-08 | Detection of clogging of smelt spout in soda-recovering boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04100990A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106676930A (en) * | 2015-11-06 | 2017-05-17 | 安德里兹有限公司 | Acoustic emission system and method for predicting explosions in dissolving tank |
| WO2021123501A1 (en) * | 2019-12-19 | 2021-06-24 | Im Serco Oy | Smelt spout with replaceable inner spout |
-
1990
- 1990-08-08 JP JP20965490A patent/JPH04100990A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106676930A (en) * | 2015-11-06 | 2017-05-17 | 安德里兹有限公司 | Acoustic emission system and method for predicting explosions in dissolving tank |
| CN106676930B (en) * | 2015-11-06 | 2020-12-22 | 安德里兹有限公司 | Acoustic emission system and method for predicting explosions in dissolution tank |
| WO2021123501A1 (en) * | 2019-12-19 | 2021-06-24 | Im Serco Oy | Smelt spout with replaceable inner spout |
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