JPH0362469B2 - - Google Patents
Info
- Publication number
- JPH0362469B2 JPH0362469B2 JP29410085A JP29410085A JPH0362469B2 JP H0362469 B2 JPH0362469 B2 JP H0362469B2 JP 29410085 A JP29410085 A JP 29410085A JP 29410085 A JP29410085 A JP 29410085A JP H0362469 B2 JPH0362469 B2 JP H0362469B2
- Authority
- JP
- Japan
- Prior art keywords
- soot
- dust concentration
- concentration meter
- dust
- time
- 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
- 239000000428 dust Substances 0.000 claims description 54
- 239000004071 soot Substances 0.000 claims description 32
- 238000001514 detection method Methods 0.000 claims description 13
- 230000036962 time dependent Effects 0.000 claims description 3
- 239000012717 electrostatic precipitator Substances 0.000 description 15
- 238000010926 purge Methods 0.000 description 15
- 230000002123 temporal effect Effects 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Electrostatic Separation (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は例えば電気集塵装置の荷電制御シス
テムに適用される煤塵濃度計経時変化検出装置に
関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a soot and dust concentration meter aging change detection device applied to, for example, a charge control system of an electrostatic precipitator.
一般に、電気集塵装置の荷電制御システムは第
４図に示すように電気集塵装置１と煙突２との間
の煙道３に対して煤塵濃度計サンプリング管４及
び煤塵濃度計検出部５で構成される煤塵濃度計を
設置して煤塵を検出し、煤塵量と相関関係を有し
た濃度信号６を電気集塵装置１の荷電制御装置７
にフイールドバツクさせる。これにより、荷電制
御装置７は電気集塵装置１の出力煤塵量が所定の
値となるように、直流高電圧電源装置８の荷電量
あるいは間欠荷電の荷電率を制御し、放電電極９
に対して所定の電圧・電流を供給せしめる。な
お、上記煤塵濃度計は運転初期の清浄状態を保つ
て高精度検出を可能せしめるために、適宜に設定
された周期及び時間でパージされる。
Generally, the charge control system of an electrostatic precipitator uses a soot concentration meter sampling pipe 4 and a soot concentration meter detection section 5 for a flue 3 between an electrostatic precipitator 1 and a chimney 2, as shown in FIG. A soot and dust concentration meter is installed to detect soot and dust, and a concentration signal 6 having a correlation with the amount of soot and dust is sent to the charge control device 7 of the electrostatic precipitator 1.
field back. As a result, the charge control device 7 controls the charge amount of the DC high voltage power supply device 8 or the charge rate of intermittent charging so that the output dust amount of the electrostatic precipitator 1 becomes a predetermined value, and controls the charge rate of the discharge electrode 9
A predetermined voltage and current are supplied to the In order to maintain the clean state at the initial stage of operation and enable highly accurate detection, the dust concentration meter is purged at appropriately set intervals and times.
ところが、上記電気集塵装置の荷電制御システ
ムでは、例えば石炭焚きボイラ用電気集塵装置等
の入口ガス条件が絶えず変化する電気集塵装置に
適用した場合、煤塵濃度計を常時、清浄な状態を
保つために実施されるパージの周期及び時間をガ
ス条件の変動に対応する最適状態に設定すること
が困難であるという問題を有していた。これによ
れば、煤塵濃度計がパージの不適にともなう煤塵
の付着により徐々に経時劣化を来して、荷電制御
の信頼性が低下されると共に、システムの故障を
招くおそれを有していた。
However, when the charge control system for an electrostatic precipitator is applied to an electrostatic precipitator where the inlet gas conditions are constantly changing, such as an electrostatic precipitator for a coal-fired boiler, it is difficult to keep the soot concentration meter in a clean state at all times. There has been a problem in that it is difficult to set the period and time of purge performed for maintenance to an optimal state corresponding to fluctuations in gas conditions. According to this, the soot and dust concentration meter gradually deteriorates over time due to the adhesion of soot and dust due to improper purging, reducing the reliability of charge control and potentially causing system failure.
この発明の目的は上記の事情に鑑みてなされた
もので、煤塵濃度計のパージの最適設定を可能せ
しめるように煤塵濃度計の煤塵による経時変化を
自動的に検出し得るようにした煤塵濃度計経時変
化検出装置を提供することにある。 The object of the present invention has been made in view of the above circumstances, and is to provide a soot and dust concentration meter that can automatically detect changes over time due to soot and dust in the soot and dust concentration meter so as to enable optimum purging settings of the soot and dust concentration meter. An object of the present invention is to provide a temporal change detection device.
この発明の特徴は集塵装置の出口側に設置され
た煤塵濃度計からの濃度信号を読み取り一定時間
おきに煤塵濃度平均値を算出し、かつ該煤塵濃度
計のパージ時間前後の該煤塵濃度平均値の差を算
出し、予め設定されている経時変化制限値と比較
する回路装置を備えたことにある。
The feature of this invention is to read the concentration signal from the dust concentration meter installed on the exit side of the dust collector, calculate the average value of the dust concentration at regular intervals, and calculate the average value of the dust concentration before and after the purge time of the dust concentration meter. The present invention includes a circuit device that calculates the difference between the values and compares it with a preset aging limit value.
すなわち、この発明の煤塵濃度計経時変化検出
装置は煤塵濃度計のパージ実施前の平均煤塵濃度
値とパージ実施後の平均煤塵濃度値との差を該煤
塵濃度計の煤塵による汚れ及び詰りの度合てし
て、平均煤塵濃度値の差から該煤塵濃度計の経時
変化を検出し、パージ周期及び時間の最適設定を
可能せしめるようにしたものである。
That is, the soot and dust concentration meter temporal change detection device of the present invention detects the difference between the average soot and dust concentration value before purging of the soot and dust concentration meter and the average soot and dust concentration value after purging, and determines the degree of contamination and clogging of the soot and dust concentration meter due to soot and dust. Accordingly, the change over time of the dust concentration meter is detected from the difference in the average dust concentration value, thereby making it possible to optimally set the purge period and time.
以下、この発明の実施例について、図面を参照
して詳細に説明する。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第１図はこの発明の一実施例の適用された電気
集塵装置の荷電制御システムを示すもので、図中
１０は電気集塵装置である。そして、この電気集
塵装置１０と煙突１１との間の煙道１２には煤塵
濃度計サンプリング管１３及び煤塵濃度計検出部
１４等で構成される煤塵濃度計が配設される。こ
の煤塵濃度計の煤塵濃度計検出部１４はその濃度
及びパージ信号出力端がそれぞれ回路装置例えば
荷電制御装置１５に接続される。この荷電制御装
置１５はその第１の出力端が直流高電圧電源装置
１６を介して放電電極１７に接続され、その第２
の出力端は図示しない警報装置に接続される。 FIG. 1 shows a charge control system for an electrostatic precipitator to which an embodiment of the present invention is applied, and numeral 10 in the figure indicates the electrostatic precipitator. In the flue 12 between the electrostatic precipitator 10 and the chimney 11, a dust densitometer is disposed, which includes a dust densitometer sampling pipe 13, a dust densitometer detection section 14, and the like. The dust concentration meter detection section 14 of this dust concentration meter has its concentration and purge signal output terminals connected to a circuit device, for example, a charge control device 15, respectively. This charge control device 15 has a first output end connected to a discharge electrode 17 via a DC high voltage power supply device 16, and a second output end thereof.
The output end of is connected to an alarm device (not shown).
上記構成において、荷電制御装置１５は煤塵濃
度計検出部１４の濃度信号１８に応じて電気集塵
装置１０の出口煤塵量が所定の値となるように、
直流高電圧電源装置１６の荷電量あるいは間欠荷
電の荷電率を制御して、放電電極１７に対して所
定の電圧・電流を供給せしめる。 In the above configuration, the charge control device 15 controls the amount of dust at the outlet of the electrostatic precipitator 10 to a predetermined value according to the concentration signal 18 of the dust concentration meter detection unit 14.
A predetermined voltage and current are supplied to the discharge electrode 17 by controlling the amount of charge of the DC high voltage power supply device 16 or the charge rate of intermittent charging.
また、上記荷電制御装置１５は濃度信号１８が
入力されて読み取ると、第２図に示すようにその
一定時間（例えば５分）の平均値を算出し、これ
をSN（パージ後の煤塵濃度平均値）としてメモリ
し、第３図に示すようにパージ信号１９がオンと
なつた時点t1におけるSN値をパージ実施前の平
均煤塵濃度値SN1としてメモリする（ステツプS1
〜S6）。そして、ステツプS7のパージが完了した
時点t2からは再び上記濃度信号１８の読み込みが
行なわれてパージ実施前と同様に平均煤塵濃度値
SNを算出し、上記SN1との差Ｖ値を演算する
（ステツプS8〜S10）。次に、ステツプS11ではＶ値
を予め設定した経時変化制限値SOと比較し、Ｖ
＜SOの場合、煤塵濃度計経時変化のないことを
検知して経予する（ステツプS13）。また、ステツ
プS11ではＶ≧SOの場合、煤塵濃度計経時変化の
あるのを検知して図示しない警報装置に警報信号
２０を出力して終了する（ステツプS12、S13）。 When the charge control device 15 receives and reads the concentration signal 18, it calculates the average value over a certain period of time (for example, 5 minutes) as shown in FIG. As shown in FIG. 3, the SN value at time t 1 when the purge signal 19 is turned on is stored as the average dust concentration value SN 1 before purge implementation (step S 1
~ S6 ). Then, from time t 2 when the purge in step S 7 is completed, the concentration signal 18 is read again and the average dust concentration is calculated as before the purge.
SN is calculated, and the difference V value from the above SN 1 is calculated (steps S 8 to S 10 ). Next, in step S11 , the V value is compared with a preset time-dependent change limit value SO, and the V value is
In the case of <SO, the soot and dust concentration meter detects that there is no change over time and makes a prediction (Step S13 ). Further, in step S11 , if V≧SO, it is detected that there is a change over time in the dust concentration meter, and an alarm signal 20 is output to an alarm device (not shown), and the process ends (steps S12 , S13 ).
このように、上記煤塵濃度計経時検出装置は煤
塵濃度計の経時変化を自動的に検出し得るので、
常時煤塵濃度計のパージ周期及び時間の最適設定
が可能となり、可及的に荷重制御の信頼性が向上
される。 In this way, the above-mentioned soot and dust concentration meter aging detection device can automatically detect changes in the soot and dust concentration meter over time;
The purge period and time of the dust concentration meter can be set optimally at all times, and the reliability of load control is improved as much as possible.
以上詳述したように、この発明によれば例えば
ガス条件の変動等に対応して煤塵濃度計のパージ
周期及び時間の最適設定を可能せしめるように煤
塵濃度計の煤塵による経時変化を自動的に認識し
得るようにした煤塵濃度計経時変化検出装置を提
供することができる。
As described in detail above, according to the present invention, changes over time due to soot and dust in the soot and dust concentration meter can be automatically adjusted to enable optimal setting of the purge period and time of the soot and dust concentration meter in response to changes in gas conditions, etc. It is possible to provide a device for detecting changes over time in a dust concentration meter that can be recognized.
第１図はこの発明の一実施例に係る煤塵濃度計
経時変化検出装置の適用された電気集塵装置の荷
電制御システムを示す構成説明図、第２図及び第
３図はそれぞれ第１図の煤塵濃度計経時変化検出
装置の動作を説明するために示したフローチヤー
ト図及びタイムチヤート図、第４図は従来の電気
集塵装置の荷電制御システムを示す構成説明図で
ある。
１０……電気集塵装置、１１……煙突、１２…
…煙道、１３……煤塵濃度計サンプリング管、１
４……煤塵濃度計検出部、１５……荷電制御装
置、１６……直流高電圧電源装置、１７……放電
電極、１８……濃度信号、１９……パージ信号、
２０……警報信号。
FIG. 1 is a configuration explanatory diagram showing a charge control system of an electrostatic precipitator to which a dust concentration meter temporal change detection device according to an embodiment of the present invention is applied, and FIGS. 2 and 3 are respectively similar to those shown in FIG. FIG. 4 is a flow chart and a time chart shown to explain the operation of the dust concentration meter temporal change detection device, and FIG. 4 is a configuration explanatory diagram showing a charge control system of a conventional electrostatic precipitator. 10...Electrostatic precipitator, 11...Chimney, 12...
...Flue, 13...Soot and dust concentration meter sampling pipe, 1
4... Dust concentration meter detection unit, 15... Charge control device, 16... DC high voltage power supply device, 17... Discharge electrode, 18... Concentration signal, 19... Purge signal,
20...Alarm signal.
Claims (1)
と、該煤塵濃度計から濃度信号を読み取り一定時
間おきに煤塵濃度平均値を算出し、かつ該煤塵濃
度計のバージ時間前後の該煤塵濃度平均値の差を
算出し、予め設定されている経時変化制限値と比
較する回路装置とを具備したことを特徴とする煤
塵濃度計経時変化検出装置。1 A soot and dust concentration meter installed on the exit side of the dust collector, and a concentration signal from the soot and dust concentration meter are read and the average value of soot and dust concentration is calculated at regular intervals, and the soot and dust concentration before and after the barging time of the soot and dust concentration meter is calculated. What is claimed is: 1. A time-dependent change detection device for a soot and dust concentration meter, comprising a circuit device that calculates a difference between average values and compares the difference with a preset time-dependent change limit value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29410085A JPS62152554A (en) | 1985-12-27 | 1985-12-27 | Apparatus for detecting change of soot densitometer with elapse of time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29410085A JPS62152554A (en) | 1985-12-27 | 1985-12-27 | Apparatus for detecting change of soot densitometer with elapse of time |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62152554A JPS62152554A (en) | 1987-07-07 |
| JPH0362469B2 true JPH0362469B2 (en) | 1991-09-26 |
Family
ID=17803285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29410085A Granted JPS62152554A (en) | 1985-12-27 | 1985-12-27 | Apparatus for detecting change of soot densitometer with elapse of time |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62152554A (en) |
-
1985
- 1985-12-27 JP JP29410085A patent/JPS62152554A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62152554A (en) | 1987-07-07 |
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