JPH0799247B2 - Automatic control method for short-term pause storage of small once-through boiler - Google Patents
Automatic control method for short-term pause storage of small once-through boilerInfo
- Publication number
- JPH0799247B2 JPH0799247B2 JP61005795A JP579586A JPH0799247B2 JP H0799247 B2 JPH0799247 B2 JP H0799247B2 JP 61005795 A JP61005795 A JP 61005795A JP 579586 A JP579586 A JP 579586A JP H0799247 B2 JPH0799247 B2 JP H0799247B2
- Authority
- JP
- Japan
- Prior art keywords
- boiler
- steam
- temperature
- small once
- valve
- 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
Links
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、小型貫流ボイラの短期間休止保存方法に関す
るものである。Description: TECHNICAL FIELD The present invention relates to a short-term pause storage method for a small once-through boiler.
（従来の技術） 小型貫流ボイラは、腐食防止などのために給水系統途中
に薬注装置を設け、給水ポンプに連動させるなどして、
給水量に対し一定量の薬品を加えた水を給水している。
ボイラの運転を終了し、蒸気弁が閉じられた後の蒸気部
は、残っていた蒸気によって高圧を保つが、ボイラが冷
えるに従って蒸気も冷えて水に戻り、蒸気部の圧力が低
下する。ボイラ内が真空化すると、適切な薬品処理が行
われていない水がボイラ内に吸引され、ボイラ水の濃度
が適正に保たれなくなる。そのためボイラを休止する場
合には、手動で空気抜き用バルブを開く必要がある。ボ
イラ内が高温で、蒸気に圧力が有る間に空気抜き用バル
ブを開くと蒸気が吹き出すため、空気抜きバルブを開く
のは、ボイラ内蒸気圧力がゲージ圧で0kg/cm2になるま
で待たなければならず、ボイラが冷えるまでに長い時間
がかかり、作業性が悪かった。(Prior art) A small once-through boiler is equipped with a chemical injection device in the middle of the water supply system to prevent corrosion, and is linked to a water supply pump.
Water is supplied with a certain amount of chemicals added to the water supply.
The steam part after the operation of the boiler is finished and the steam valve is closed maintains high pressure due to the remaining steam, but as the boiler cools, the steam also cools and returns to water, and the pressure of the steam part decreases. When the inside of the boiler is evacuated, water that has not been appropriately treated with chemicals is sucked into the boiler, and the concentration of boiler water cannot be maintained properly. Therefore, when the boiler is stopped, it is necessary to open the air vent valve manually. When the air vent valve is opened while the steam is hot and there is pressure in the steam, the steam blows out.Therefore, you must wait until the steam pressure in the boiler reaches 0 kg / cm 2 in gauge before opening the air vent valve. In addition, it took a long time for the boiler to cool down, and the workability was poor.
（発明の目的） 本発明は、上記従来技術の項で指摘した問題点を改善し
ようとするもので、休止保存を自動的に行うためのもの
である。(Object of the Invention) The present invention is intended to solve the problems pointed out in the above-mentioned section of the prior art, and is to automatically perform pause storage.
（目的を達成するための手段） 本発明の上記の目的を解決するための手段として、小型
貫流ボイラの缶体蒸気部に温度センサー、気水分離器に
電気式開閉弁を設け、温度センサー、電気式開閉弁に配
線した電気式開閉弁の開閉制御装置を設け、温度センサ
ーから得られる蒸気部温度の温度変化を検出し、温度が
ボイラ運転中の高温の状態から、予め設定しておいたボ
イラ内外の圧力差が無くなる温度まで低下した時、温度
センサーからの信号によって電気式開閉弁を開く。(Means for Achieving the Purpose) As means for solving the above-mentioned object of the present invention, a temperature sensor is provided in a can body vapor part of a small once-through boiler, an electric on-off valve is provided in a steam separator, and a temperature sensor is provided. An open / close control device for the electric open / close valve wired to the electric open / close valve was installed to detect the temperature change of the steam part temperature obtained from the temperature sensor, and the temperature was set in advance from the high temperature state during boiler operation. When the pressure difference between the inside and outside of the boiler has dropped to a temperature at which it disappears, the electric on-off valve is opened by the signal from the temperature sensor.
（作用） ボイラ停止後、缶内蒸気温度が低下すればボイラ内の蒸
気圧力も低下する。温度と圧力は比例の関係にあり、圧
力を定めると温度を定めることができる。蒸気部温度が
低下し、設定しておいた圧力差が無くなる温度になった
時に蒸気部に設けた電気式開閉弁を開くことで、蒸気が
吹き出すことはなく蒸気部を大気開放できる。蒸気部の
電気式開閉弁を開くことによって、ボイラ内に残ってい
た蒸気が無くなり、圧力が下がっても、その分だけ外気
を取り入れるので、蒸気部が真空化することが無くな
り、適切な薬品処理が行われていない水が吸引されるの
を防ぐことができる。休止保存を自動的に行うので、従
来のように蒸気圧を見ながらボイラが冷えるのを待つ必
要が無くなる。(Operation) After the boiler is stopped, if the steam temperature in the can drops, the steam pressure in the boiler also drops. Temperature and pressure are in a proportional relationship, and if pressure is determined, temperature can be determined. By opening the electric on-off valve provided in the steam part when the temperature of the steam part decreases and the preset pressure difference disappears, the steam part can be opened to the atmosphere without blowing out steam. By opening the electric on-off valve in the steam section, the steam remaining in the boiler disappears, and even if the pressure drops, the outside air is taken in as much as that amount, so the steam section does not become a vacuum and proper chemical treatment It is possible to prevent the suction of water that has not been performed. Since it is automatically suspended and stored, it is not necessary to wait for the boiler to cool down while watching the steam pressure as in the conventional case.
（実施例） 以下図面を参照して本発明の実施例を説明する。第１図
は小型貫流ボイラの概略説明図を示したもので、上下一
対の環状の上部管寄せ３と下部管寄せ４をそれぞれ配設
すると共に、上下管寄せ３、４間に多数の水管５、５・
・が配置されている。気水分離器２は蒸気連絡管６と降
水管７によりボイラ本体１と接続されている。各水管
５、５・・内の上部、上部管寄せ３の内部、蒸気連絡管
６の内部、気水分離器２内の上部の斑点表示部は蒸気部
Ｓを示している。その蒸気部Ｓに温度センサー８、気水
分離器に電磁弁９を付け、温度センサー、電磁弁に配線
した電気式開閉弁の開閉制御装置10を設け、温度センサ
ーから得られる蒸気部温度によって電磁弁を開閉させる
次に、本発明の作用について説明する。ボイラ停止後、
缶内蒸気温度が低下すればボイラ内の蒸気の圧力も低下
する。ボイラ内蒸気圧力がゲージ圧で0kg/cm2に相当す
る温度を予め設定しておき、その温度になったことを温
度センサーにて検出し、開閉制御装置へ信号を送る。開
閉制御装置は信号を受けて電磁弁を開き、蒸気部を大気
開放する。ボイラ内の圧力が0kg/cm2に相当する温度で
蒸気部を大気開放することで、ボイラ内から蒸気が吹き
出すことなく、その後温度が低下し、蒸気が無くなって
も真空化しないため、余剰水が吸引されることが無くな
る。また、温度によって自動的に休止保存を行うので、
圧力を見ながらボイラが冷えるのを待つ必要が無くな
る。Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic explanatory view of a small once-through boiler, in which a pair of upper and lower annular headers 3 and 4 are arranged, and a large number of water pipes 5 are arranged between the upper and lower headers 3 and 4. 5,
・ Is placed. The steam separator 2 is connected to the boiler body 1 by a steam communication pipe 6 and a downfall pipe 7. The upper portion of each water pipe 5, 5, ..., Inside the upper header 3, inside the steam communication pipe 6, and on the upper portion of the steam separator 2 indicates the steam portion S. A temperature sensor 8 is attached to the steam part S, a solenoid valve 9 is attached to a steam separator, and a temperature sensor and an opening / closing control device 10 for an electric on-off valve wired to the solenoid valve are provided. Next, the operation of the present invention will be described. After the boiler stopped,
If the steam temperature in the can drops, the steam pressure in the boiler also drops. The temperature corresponding to the steam pressure inside the boiler is 0 kg / cm 2 in gauge pressure is set in advance, the temperature sensor detects that temperature is reached, and a signal is sent to the switching control device. The opening / closing control device receives the signal and opens the solenoid valve to open the steam part to the atmosphere. By opening the steam part to the atmosphere at a temperature equivalent to 0 kg / cm 2 in the boiler, the steam will not blow out from the boiler and the temperature will drop after that. Is no longer sucked. Also, because it automatically saves depending on the temperature,
There is no need to wait for the boiler to cool down while watching the pressure.
（発明の効果） 蒸気部の温度により適切な圧力時に電気式開閉弁を開く
ことで、蒸気が吹き出すことなく蒸気部を大気開放する
ことができる。蒸気部を大気開放することで、蒸気部が
真空化することが無くなり、適切な薬品処理が行われて
いない水が吸引されるのを防ぐことができる。休止保存
を自動的に行うので、従来のように蒸気圧を見ながらボ
イラが冷えるのを待つ必要が無くなり、作業性の向上が
図れる。(Effects of the Invention) By opening the electric on-off valve at an appropriate pressure depending on the temperature of the steam part, the steam part can be opened to the atmosphere without blowing out steam. By opening the steam section to the atmosphere, the steam section is not evacuated, and it is possible to prevent water that has not been appropriately treated with chemicals from being sucked. Since the suspension storage is automatically performed, it is not necessary to wait for the boiler to cool down while watching the steam pressure as in the conventional case, and workability can be improved.
第一図は本発明の一実施例にかかる小型貫流ボイラの概
略断面図である。 １……ボイラ本体 ２……気水分離器 ８……温度センサー ９……電磁弁 10……開閉制御装置FIG. 1 is a schematic sectional view of a small once-through boiler according to an embodiment of the present invention. 1 …… Boiler body 2 …… Steam / water separator 8 …… Temperature sensor 9 …… Solenoid valve 10 …… Opening / closing control device
Claims (1)
温度センサー、気水分離器に電気式開閉弁を設け、温度
センサー、電気式開閉弁に配線した電気式開閉弁の開閉
制御装置を設け、温度センサーから得られる蒸気部温度
の温度変化を検出し、温度がボイラ運転中の高温の状態
から、設定温度まで低下したとき、電気式開閉弁を開
き、ボイラ内部の真空化を防止することでボイラ内部へ
の余剰給水の流入を防止する休止保存を自動的に行うこ
とを特徴とする小型貫流ボイラの短期間休止保存の自動
制御方法。1. In a small once-through boiler, a temperature sensor is provided in the can steam section S, an electric opening / closing valve is provided in the steam separator, and an opening / closing control device for the electric opening / closing valve wired to the temperature sensor and the electric opening / closing valve is provided. The temperature change of the steam temperature obtained from the temperature sensor is detected, and when the temperature drops from the high temperature during boiler operation to the set temperature, the electric on-off valve is opened to prevent the inside of the boiler from being evacuated. Therefore, an automatic control method for short-term pause storage of a small once-through boiler is characterized by automatically performing pause storage to prevent excess feed water from flowing into the boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61005795A JPH0799247B2 (en) | 1986-01-14 | 1986-01-14 | Automatic control method for short-term pause storage of small once-through boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61005795A JPH0799247B2 (en) | 1986-01-14 | 1986-01-14 | Automatic control method for short-term pause storage of small once-through boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62166201A JPS62166201A (en) | 1987-07-22 |
| JPH0799247B2 true JPH0799247B2 (en) | 1995-10-25 |
Family
ID=11621013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61005795A Expired - Fee Related JPH0799247B2 (en) | 1986-01-14 | 1986-01-14 | Automatic control method for short-term pause storage of small once-through boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0799247B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63311004A (en) * | 1987-06-15 | 1988-12-19 | 株式会社日立ビルシステムサービス | Steam piping system negative pressure preventive device |
| US8844191B2 (en) | 2009-03-30 | 2014-09-30 | Tma Corporation Pty Ltd | Composite termite barrier |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS602404Y2 (en) * | 1980-09-03 | 1985-01-23 | 株式会社 東京暖冷器製作所 | Boiler safety valve |
-
1986
- 1986-01-14 JP JP61005795A patent/JPH0799247B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62166201A (en) | 1987-07-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |