JPH0449446Y2 - - Google Patents
Info
- Publication number
- JPH0449446Y2 JPH0449446Y2 JP1984119813U JP11981384U JPH0449446Y2 JP H0449446 Y2 JPH0449446 Y2 JP H0449446Y2 JP 1984119813 U JP1984119813 U JP 1984119813U JP 11981384 U JP11981384 U JP 11981384U JP H0449446 Y2 JPH0449446 Y2 JP H0449446Y2
- Authority
- JP
- Japan
- Prior art keywords
- time
- water
- amount
- boiler
- chemical
- 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
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 78
- 239000000126 substance Substances 0.000 claims description 58
- 238000002485 combustion reaction Methods 0.000 claims description 36
- 238000002347 injection Methods 0.000 claims description 28
- 239000007924 injection Substances 0.000 claims description 28
- 239000000243 solution Substances 0.000 claims description 14
- 238000007664 blowing Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 11
- 230000008020 evaporation Effects 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 7
- 230000004913 activation Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は、ボイラーの水位制御装置からの信
号によりON−OFF稼動する給水装置を備えた小
型ボイラーの薬液注入制御装置に関するものであ
る。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a chemical liquid injection control device for a small boiler equipped with a water supply device that is turned on and off by a signal from a water level control device of the boiler.
ボイラーは、熱源である燃料の熱エネルギーを
有効に且つ適切に利用するために、それを蒸気ま
たは温水の形に変えて供給するものであるが、ボ
イラー機能に応じた給水管理を行つてはじめて安
全に効率よく、かつ長く使用することができるも
のである。給水管理のためのボイラーの水処理と
しては、硬水軟化装置を使つて原水中の不純物を
取り除く缶外処理と、薬注装置にてボイラー内に
薬液を注入し硬水軟化装置で除去しきれないシリ
カ分や缶体の腐食の原因となる溶存酸素を除去す
る缶内処理とが採用されている。
In order to effectively and appropriately utilize the thermal energy of the fuel that is the heat source, a boiler converts it into steam or hot water and supplies it, but it is only safe if the water supply is managed according to the boiler's function. It can be used efficiently and for a long time. Boiler water treatment for water supply management includes external treatment using a water softener to remove impurities in the raw water, and chemical injection equipment that injects chemicals into the boiler to remove silica that cannot be removed by the water softener. In-can treatment is used to remove dissolved oxygen, which causes corrosion of the can body.
従来、水位制御装置の信号を受けてON−OFF
稼動する給水装置を備えたボイラーにおいては、
ボイラー水の缶内処理を行うために、ボイラーに
併置して薬注装置を設け、この薬注装置を給水装
置に連動して稼動させることにより給水量に対し
て一定割合の薬液を注入する方法が行われてい
る。この方法では、薬液の注入量は水質ならびに
給水ポンプの能力を考慮して決定され、同時に、
薬注装置の吐出能力が設定される。ところが、給
水装置の吐出量は、ボイラーの蒸気圧の変動ある
いは給水装置の能力低下によつて変化し、経年的
に給水装置の稼動時間が長くなる。一方、薬注装
置の経年変化は少ないため、給水装置と薬注装置
を連動させていると相対的に薬液の注入量が多く
なり、薬液の無駄使いとなつていた。 Conventionally, it turned on and off in response to a signal from a water level control device.
In boilers with a working water supply system,
In order to treat boiler water in the tank, a chemical injection device is installed alongside the boiler, and this chemical injection device is operated in conjunction with the water supply device, thereby injecting a certain proportion of chemical liquid to the amount of water supplied. is being carried out. In this method, the amount of chemical solution to be injected is determined by considering the water quality and the capacity of the water pump, and at the same time,
The discharge capacity of the chemical injection device is set. However, the discharge amount of the water supply device changes due to fluctuations in the steam pressure of the boiler or a decrease in the capacity of the water supply device, and the operating time of the water supply device becomes longer over time. On the other hand, because the chemical injection device does not change much over time, when the water supply device and the chemical injection device are linked, the amount of chemical solution injected becomes relatively large, resulting in wasteful use of the chemical solution.
〔課題を解決するための手段〕
この考案は、上記のような事情に鑑み為された
もので、その目的は、燃焼時間に応じて薬注装置
の稼動時間を決定し、薬液注入量を最小限にとど
めるボイラーの薬液注入装置を提供することにあ
る。[Means for solving the problem] This invention was devised in view of the above-mentioned circumstances, and its purpose is to determine the operating time of the chemical injection device according to the combustion time, and to minimize the amount of chemical injection. The purpose of this invention is to provide a boiler chemical injection device that is limited to
上記目的を達成するために、この考案では、燃
焼装置と、缶水のブローを行う缶水ブロー装置
と、缶内の水位を設定範囲に維持する給水装置
と、給水量に応じて薬液を供給する薬液装置とを
備えたボイラーにおいて、ブロー後の最初の給水
時に所容量の薬液を注入するのに必要な時間t1だ
け薬注装置を稼動させる機能と、ボイラーの運転
再開後は、運転時間を任意の設定時間Ｔ（T1，
T2，…）に分割し、この各分割設定時間内での
実際の燃焼時間t2（t21，t22…）を検出積算し、設
定時間Tnに対応する燃焼時間t2oを検出した後の
次の設定時間To+1において、該燃焼時間t2o間に
蒸発した蒸発量に対応する量の薬液を注入するの
に必要な時間だけ薬注装置を稼動させる機能とを
有する制御装置を備えたことを特徴とする。 In order to achieve the above objective, this invention includes a combustion device, a can water blowing device that blows can water, a water supply device that maintains the water level in the can within a set range, and a chemical solution that supplies a chemical solution according to the amount of water supplied. In a boiler equipped with a chemical liquid device, there is a function to operate the chemical feeding device for the time t 1 required to inject the required amount of chemical liquid at the first water supply after blowing, and to operate the chemical feeding device for the time t 1 required to inject the required amount of chemical liquid at the first water supply after blowing, and after restarting the boiler, the operation time for any set time T (T 1 ,
T 2 ,...), the actual combustion time t 2 (t 21 , t 22 ...) within each divided set time is detected and integrated, and the combustion time t 2o corresponding to the set time Tn is detected. At the next set time T o+1 , the control device has a function of operating the chemical dosing device for the time necessary to inject an amount of chemical liquid corresponding to the amount of evaporation evaporated during the combustion time t2o . It is characterized by being equipped.
以下、この考案を図面に従つて説明する。図面
はこの考案の一実施例を示す説明図である。図中
の符号１は小型ボイラーを示す。２は、ボイラー
の蒸気圧に応じてON−OFF稼動する燃焼装置で
あつて、そのON−OFF稼動信号が後述の制御装
置６に送信される。３は、ボイラーの缶水濃度を
一定値以下に維持するために、あるいは缶底に溜
まつた堆積物を排出するために、缶水をブローす
る缶水ブロー装置である。この装置の作動につい
ては、定期的（例えば毎日ボイラー始動時）に作
動させてもよく、又ボイラーの缶水の濃縮度を検
出し、その信号に応じて作動させることもでき
る。この装置の作動信号も制御装置６に送信され
るように構成されている。
This invention will be explained below with reference to the drawings. The drawing is an explanatory view showing one embodiment of this invention. Reference numeral 1 in the figure indicates a small boiler. Reference numeral 2 denotes a combustion device that operates ON-OFF depending on the steam pressure of the boiler, and its ON-OFF operation signal is transmitted to a control device 6, which will be described later. 3 is a can water blowing device that blows can water in order to maintain the concentration of can water in the boiler below a certain value or to discharge deposits accumulated at the bottom of the can. This device may be operated periodically (for example, every day when the boiler is started), or it may be operated in response to a signal detected by detecting the concentration of canned water in the boiler. The activation signal of this device is also configured to be transmitted to the control device 6.
４は、ボイラーへの給水ライン中に設けられる
給水装置である。この装置は、ボイラーの水位を
一定範囲に維持するために、ボイラーの水位制御
装置（図示せず）からの信号を受けてON−OFF
稼動し、その稼動信号が制御装置６に送信される
ようになつている。５はボイラーに至る薬注ライ
ンに設けられる薬注装置であつて、後述の制御装
置６の信号を受けてON−OFF稼動する。 4 is a water supply device provided in the water supply line to the boiler. This device turns on and off in response to a signal from the boiler's water level control device (not shown) in order to maintain the water level in the boiler within a certain range.
The operating signal is sent to the control device 6. Reference numeral 5 denotes a chemical injection device installed in a chemical injection line leading to the boiler, which operates ON-OFF in response to a signal from a control device 6, which will be described later.
前掲の制御装置６は、次のように働く。即ち、
缶水ブロー装置３により缶内の水を排出した後、
再給水する際、給水量（例えば全ブロー後であれ
ばボイラーの保有水量）に対応する薬液量を注入
するのに必要な薬注装置５の稼動時間t1を設定
し、ブロー後の給水中に薬注装置を該設定時間t1
だけ稼動させる。ボイラーの運転再開後は、ボイ
ラーの運転時間を任意の設定時間Ｔ（T1，T2，
…）に分割し、この分割設定時間内の燃焼時間t2
（t21，t22…）を燃焼装置から検出積算し、設定時
間Ｔ内の燃焼時間t2に対応する蒸発量（ボイラー
の蒸発能力に基づいて算出）と、給水される水の
水質とから算出される薬品量を、ボイラーに注入
するのに必要な薬注装置作動時間t3（t31，t32，
…）を設定し、該時間だけ薬注装置を作動させる
ように作動信号を送る。例えば、設定時間T1内
の燃焼時間t21を検出し、次の分割設定時間T2の
間において給水装置が稼動する際に、薬注装置を
前記燃焼時間t21に対応する設定時間t31だけ作動
させるように薬注装置に作動信号を送信する。 The control device 6 described above works as follows. That is,
After the water in the can is discharged by the can water blowing device 3,
When resupplying water, set the operating time t 1 of the chemical injection device 5 necessary to inject the amount of chemical solution corresponding to the amount of water supplied (for example, the amount of water held in the boiler after full blowing), and Set the drug dosing device at the corresponding setting time t 1
only operate. After restarting the boiler operation, the boiler operation time is set to an arbitrary setting time T (T 1 , T 2 ,
), and the combustion time t 2 within this division setting time
(t 21 , t 22 ...) is detected and integrated from the combustion device, and the amount of evaporation corresponding to the combustion time t 2 within the set time T (calculated based on the evaporation capacity of the boiler) is calculated from the water quality of the water supplied. The chemical injection device operating time t 3 (t 31 , t 32 , t 32 , t 32 ,
), and sends an activation signal to operate the chemical injection device for the specified period of time. For example, when the combustion time t 21 within the set time T 1 is detected, and when the water supply device operates during the next divided set time T 2 , the chemical dosing device is set to the set time t 31 corresponding to the combustion time t 21 . Sends an activation signal to the chemical injection device to activate only the chemical injection device.
この考案の作用について次に説明する。ボイラ
ーの稼動時間から濃縮と判断される時あるいは別
個に設けた濃縮検出装置（図示せず）から信号が
発せられた時、燃焼装置の作動を停止しブロー装
置にて缶水の全ブローを行う。ブロー操作が完了
すると、制御装置６により薬注装置作動時間t1が
リセツトされ、ボイラーに設けた水位制御装置
（図示せず）の働きにより給水装置４が稼動し、
所定の水位まで給水補給される。このとき、薬注
装置５は、制御装置６の指令により設定時間t1だ
け稼動し、所定の薬液量が注入される。ボイラー
の水位が所定位置に達すると燃焼装置が作動し、
ボイラー缶水の蒸発が始まる。その後、燃焼装置
２は、ボイラーに設けた蒸気圧力制御装置（図示
せず）の制御信号にてON−OFF作動し、ボイラ
ー蒸気圧を所定の圧力範囲に維持する。蒸発によ
り水位が低下すると、水位制御装置（図示せず）
の働きにより給水装置４が作動し、所定の水位レ
ベルが維持される。 The operation of this invention will be explained next. When it is determined that the canned water is concentrated based on the operating time of the boiler, or when a signal is issued from a separately provided concentration detection device (not shown), the operation of the combustion device is stopped and all of the canned water is blown out by the blowing device. . When the blowing operation is completed, the chemical injection device operating time t1 is reset by the control device 6, and the water supply device 4 is operated by the action of a water level control device (not shown) provided in the boiler.
Water is replenished to the specified water level. At this time, the chemical injection device 5 operates for a set time t1 according to a command from the control device 6, and a predetermined amount of the chemical solution is injected. When the water level in the boiler reaches a predetermined position, the combustion device is activated.
The boiler water begins to evaporate. Thereafter, the combustion device 2 is turned on and off by a control signal from a steam pressure control device (not shown) provided in the boiler to maintain the boiler steam pressure within a predetermined pressure range. When the water level decreases due to evaporation, a water level control device (not shown)
The water supply device 4 is activated by the action of the water supply device 4, and a predetermined water level is maintained.
一方、制御装置６は、燃焼装置作動信号を受け
て分割設定時間Ｔ（T1，T2，…）ごとに燃焼時間
t2（t21，t22…）を積算し、燃焼時間即ち蒸発量に
相応する薬注装置作動時間t3（t31，t32…）を算出
する。薬注装置は、制御装置からの信号を受け
て、分割設定時間To経過後の次の分割設定時間
To+1における給水時に、積算燃焼時間t2oに対応
する算出時間t3oだけ稼動し、Toの間に給水した
給水量に対応する薬液量を次の分割設定時間
To+1の間にボイラーへ供給する。 On the other hand, the control device 6 receives the combustion device activation signal and adjusts the combustion time for each divided set time T (T 1 , T 2 ,...).
t 2 (t 21 , t 22 . . . ) is integrated to calculate the combustion time, that is, the chemical injection device operating time t 3 (t 31 , t 32 . . .) corresponding to the evaporation amount. The chemical dosing device receives the signal from the control device and starts the next division setting time after the division setting time T o has elapsed.
When water is supplied at T o+1 , it operates for a calculation time t 3o corresponding to the cumulative combustion time t 2o , and the amount of chemical solution corresponding to the amount of water supplied during T o is divided into the next set time.
Supply to the boiler during T o+1 .
この考案は以上のように構成され、給水量に応
じた薬液量が分割設定時間Ｔごとに１サイクル遅
れで供給される。なお、ブロー後の補給水に対す
る薬液は、給水補給時に注入する他、給水補給後
におこなわれる最初の分割設定時間T1中の給水
時に注入することもできる。又、前述の説明で
は、燃焼量が一定の場合について説明がなされて
いるが、これに限るわけではなく、燃焼量が負荷
に応じて変化する場合には、その変化を燃焼装置
から検出し、その検出信号に応じて蒸発量即ち薬
注量（薬注装置稼動時間）を補正することにより
給水量に応じた薬液を供給することもできる。例
えば、ボイラーの燃焼量が負荷に応じて低燃焼量
と高燃焼量（低燃焼量の２倍）といつた変化をす
る場合、燃焼時間を積算する際、低燃焼量のとき
は通常の積算を行い、高燃焼量のときには低燃焼
量のときの２倍の積算を行うことにより燃焼量の
変化に対する補正を容易に行うことができる。 This invention is constructed as described above, and the amount of chemical liquid corresponding to the amount of water supplied is supplied with a delay of one cycle for each divided set time T. Note that the chemical solution for the makeup water after blowing can be injected not only at the time of water supply, but also at the time of water supply during the first divided set time T1 after water supply. Further, in the above explanation, the case where the combustion amount is constant is explained, but the invention is not limited to this. When the combustion amount changes depending on the load, the change is detected from the combustion device, By correcting the evaporation amount, that is, the chemical injection amount (chemical injection device operating time) according to the detection signal, it is also possible to supply the chemical liquid according to the water supply amount. For example, if the combustion amount of a boiler varies depending on the load, such as low combustion amount and high combustion amount (twice the low combustion amount), when calculating the combustion time, when the combustion amount is low, the normal By performing the integration twice as much as when the combustion amount is low when the combustion amount is high, correction for changes in the combustion amount can be easily performed.
この考案は、以上のように、燃焼時間より給水
量を換算し、この換算給水量に応じて薬液を供給
する構成であり、又、ボイラー運転時間を任意の
設定時間Ｔに分割し、Ｔ毎に薬注制御を行う構成
であるので、ボイラーの蒸気圧力の変化に対応す
る給水装置の能力の変動あるいは給水装置の能力
低下等の影響を受けることはなく、簡単な装置構
成で、常に一定の割合で最適最小限の薬液を注入
することができる。従つて、従来のような、給水
装置の能力変化により給水装置の稼動時間が長く
なり、その結果として相対的に薬液の注入量が多
くなつて薬液の無駄使いとなるといつた問題がな
くなる。
As described above, this design converts the water supply amount from the combustion time and supplies the chemical solution according to this converted water supply amount, and also divides the boiler operating time into arbitrarily set times T, and for each T. Since the configuration controls the chemical injection, the system is not affected by fluctuations in the water supply system's capacity in response to changes in boiler steam pressure or decreases in the water supply system's capacity, and the simple system configuration allows for constant chemical injection control at all times. The optimal minimum amount of drug solution can be injected at the appropriate ratio. Therefore, the conventional problem that the operating time of the water supply device becomes longer due to a change in the capacity of the water supply device, and as a result, the amount of chemical solution injected becomes relatively large, resulting in wasteful use of the chemical solution, is eliminated.
図面はこの考案における一実施例の説明図であ
る。
１……ボイラー、２……燃焼装置、３……缶水
ブロー装置、４……給水装置、５……薬注装置、
６……制御装置。
The drawing is an explanatory diagram of one embodiment of this invention. 1... Boiler, 2... Combustion device, 3... Canned water blowing device, 4... Water supply device, 5... Chemical dosing device,
6...control device.
Claims (1)
装置３と、缶内の水位を設定範囲に維持する給水
装置４と、給水量に応じて薬液を供給する薬注装
置５とを備えたボイラー１において、ブロー後の
最初の給水時に所要量の薬液を注入するのに必要
な時間t1だけ薬注装置５を稼動させる機能と、ボ
イラーの運転再開後は、運転時間を任意の設定時
間Ｔ（T1，T2，…）に分割し、この各分割設定時
間内での実際の燃焼時間t2（t21，t22…）を検出積
算し、設定時間Toに対応する燃焼時間t2oを検出
した後の次の設定時間To+1において、該燃焼時
間t2o間に蒸発した蒸発量に対応する量の薬液を
注入するのに必要な時間だけ薬注装置５を稼動さ
せる機能とを有する制御装置６を備えたことを特
徴とするボイラーへの薬液注入制御装置。 It is equipped with a combustion device 2, a can water blowing device 3 that blows can water, a water supply device 4 that maintains the water level in the can within a set range, and a chemical dosing device 5 that supplies a chemical solution according to the amount of water supplied. In the boiler 1, there is a function to operate the chemical injection device 5 for the time t1 required to inject the required amount of chemical liquid during the first water supply after blowing, and a function to operate the chemical injection device 5 for an arbitrary set time after restarting the boiler operation. Divide into T (T 1 , T 2 , ...), detect and integrate the actual combustion time t 2 (t 21 , t 22 ...) within each divided set time, and calculate the combustion time corresponding to the set time T o . At the next set time T o+1 after detecting t 2o , the chemical injection device 5 is operated for only the time necessary to inject the amount of chemical liquid corresponding to the amount of evaporation that evaporated during the combustion time t 2o . A chemical liquid injection control device for a boiler, characterized in that it is equipped with a control device 6 having the following functions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11981384U JPS6134310U (en) | 1984-08-01 | 1984-08-01 | Chemical injection control device to boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11981384U JPS6134310U (en) | 1984-08-01 | 1984-08-01 | Chemical injection control device to boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6134310U JPS6134310U (en) | 1986-03-03 |
| JPH0449446Y2 true JPH0449446Y2 (en) | 1992-11-20 |
Family
ID=30678677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11981384U Granted JPS6134310U (en) | 1984-08-01 | 1984-08-01 | Chemical injection control device to boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6134310U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0658162B2 (en) * | 1986-12-17 | 1994-08-03 | 株式会社荏原製作所 | Control device for chemical injection in boiler system |
| JPH0711297Y2 (en) * | 1990-06-28 | 1995-03-15 | 三浦工業株式会社 | Boiler chemical injection control device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57139298A (en) * | 1981-02-24 | 1982-08-28 | Miura Co Ltd | Automatic neutralizing washing of economizer |
| JPS58153005A (en) * | 1982-03-04 | 1983-09-10 | 三浦工業株式会社 | Method of charging chemical into boiler |
| JPS594806A (en) * | 1982-06-30 | 1984-01-11 | 三浦工業株式会社 | Method of injecting chemical into boiler |
-
1984
- 1984-08-01 JP JP11981384U patent/JPS6134310U/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57139298A (en) * | 1981-02-24 | 1982-08-28 | Miura Co Ltd | Automatic neutralizing washing of economizer |
| JPS58153005A (en) * | 1982-03-04 | 1983-09-10 | 三浦工業株式会社 | Method of charging chemical into boiler |
| JPS594806A (en) * | 1982-06-30 | 1984-01-11 | 三浦工業株式会社 | Method of injecting chemical into boiler |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6134310U (en) | 1986-03-03 |
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