JPH0249561Y2 - - Google Patents
Info
- Publication number
- JPH0249561Y2 JPH0249561Y2 JP4447984U JP4447984U JPH0249561Y2 JP H0249561 Y2 JPH0249561 Y2 JP H0249561Y2 JP 4447984 U JP4447984 U JP 4447984U JP 4447984 U JP4447984 U JP 4447984U JP H0249561 Y2 JPH0249561 Y2 JP H0249561Y2
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- soot
- gas
- dust
- suction
- 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 27
- 239000004071 soot Substances 0.000 claims description 24
- 238000005259 measurement Methods 0.000 claims description 18
- 230000003028 elevating effect Effects 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims 1
- 230000007423 decrease Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
この考案は、煙道中のばいじん濃度を測定する
のに用いられるばいじん濃度の連続測定装置に関
する。[Detailed Description of the Invention] Industrial Application Field This invention relates to a continuous soot and dust concentration measuring device used to measure the soot and dust concentration in a flue.
従来技術
ばいじん濃度測定のためのばいじん捕集時に
は、ノズルにおけるガス吸引流速は、被測定箇所
である煙道中の排ガス速度と等しくなるようにし
て行う必要がある。Prior Art When collecting soot and dust for measuring soot and dust concentration, it is necessary to set the gas suction flow rate in the nozzle to be equal to the exhaust gas speed in the flue, which is the location to be measured.
ガス吸引流速を排ガス速度に等しくしたとき、
ガスメータにおける等速吸引流量qm（／min）
は、次式により算出される。 When the gas suction flow velocity is equal to the exhaust gas velocity,
Uniform suction flow rate qm (/min) in gas meter
is calculated by the following formula.
qm＝π／４d2v（１−xw／100）×273＋θm／273＋θs
×Pa＋Ps／Pa＋Pm−Pv×60×10-3(1)
ここにｄ：吸引ノズルの内径（mm）
ｖ：排ガスの流速（ｍ／sec）
xω：湿りガス中の水蒸気の体積百分率
θm：ガスメータにおける吸引ガスの温度
θs：排ガスの湿度
Pa：大気圧
Ps：測定点における静圧
Pm：ガスメータにおける吸引ガスのゲージ
圧
Pv：温度θmの飽和水蒸気圧
従来、ばいじん濃度の測定にあたつては、測定
前に予め求めた(1)式右辺の各項目の値を代入して
qmの値を算出し、測定開始時にガスメータにお
ける吸引風量が等速吸引風量qmに等しくなるよ
う、ガス吸引ポンプに設けたバイパスバルブによ
りノズル内の初期流速を調整する。そしてガス吸
引中、紙に捕集されるばいじんにより圧力損失
が増加し、ガスの流量が低下してきた場合には、
前記バイパスバルブの開度を随時調節して初期流
速を維持し、ばいじん濃度の測定を行つてきた。 qm=π/4d 2 v(1-xw/100)×273+θm/273+θs
×Pa + Ps / Pa + Pm - Pv × 60 × 10 -3 (1) where d: Inner diameter of suction nozzle (mm) v: Flow velocity of exhaust gas (m/sec) xω: Volume percentage of water vapor in wet gas θm: At the gas meter Temperature of suction gas θs: Humidity of exhaust gas Pa: Atmospheric pressure Ps: Static pressure at the measurement point Pm: Gauge pressure of suction gas at the gas meter Pv: Saturated water vapor pressure at temperature θm Conventionally, when measuring soot and dust concentration, measurement Substituting the values of each item on the right side of equation (1) that were calculated in advance,
The value of qm is calculated, and the initial flow velocity in the nozzle is adjusted using the bypass valve provided on the gas suction pump so that the suction air volume at the gas meter is equal to the uniform suction air volume qm at the start of measurement. During gas suction, if the pressure loss increases due to soot and dust collected on paper and the gas flow rate decreases,
The opening degree of the bypass valve was adjusted as needed to maintain the initial flow rate, and the soot and dust concentration was measured.
しかし、この方法を実施する場合、測定中にバ
ルブの開度調節を手動で行うことが必要不可欠と
なるため、夜間など無人状態でばいじん濃度の測
定を行うことができない不都合があつた。 However, when implementing this method, it is essential to manually adjust the opening of the valve during measurement, which has the disadvantage that it is not possible to measure soot and dust concentration unattended, such as at night.
目 的
この考案は、上記事情に鑑みてなされたもの
で、捕集ばいじんによるノズル内の流速低下を自
動的に補正して、無人状態でも精度良く測定する
ことができるばいじん濃度の連続測定装置の提供
を目的とするものである。Purpose This idea was created in view of the above circumstances, and is a continuous measurement device for soot and dust concentration that can automatically compensate for the drop in flow velocity in the nozzle due to collected soot and dust, and can measure accurately even when unattended. It is intended for the purpose of providing.
考案の構成
この考案は、被測定箇所に挿入されるノズルの
基端部に固定捕集管を接続し、この固定捕集管に
対向して進退し得る昇降式捕集管を設け、両捕集
管の間に巻取り手段によつて移動されるばいじん
捕集用紙を配設し、前記昇降式捕集管に、並列
に接続された手動式バルブと電動式バルブ、バイ
パスバルブを備えたガス吸引ポンプ、および設定
流量検出毎にパルス信号を発信するガスメータを
その順に設けるとともに、該パルス信号入力によ
り測定される単位時間当りの吸引流量が予め入力
したガスメータにおける等速吸引流量の許容範囲
内にあるとき、その流量差を解消する方向に前記
電動式バルブの開度を調節し、等速吸引流量の許
容範囲外にあるとき、設定された回数の検出によ
りガス吸引ポンプを停止する制御手段を設けたば
いじん濃度の連続測定装置である。Structure of the device In this device, a fixed collection tube is connected to the base end of the nozzle inserted into the measurement point, and an elevating type collection tube that can move forward and backward is provided opposite to the fixed collection tube. A dust collecting paper moved by a winding means is disposed between the collecting pipes, and the elevating collecting pipe is equipped with a manual valve, an electric valve, and a bypass valve connected in parallel. A suction pump and a gas meter that transmits a pulse signal each time a set flow rate is detected are installed in that order, and the suction flow rate per unit time measured by inputting the pulse signal is within the permissible range of the constant velocity suction flow rate of the gas meter input in advance. At some point, the control means adjusts the opening degree of the electric valve in a direction to eliminate the flow rate difference, and stops the gas suction pump by detecting a set number of times when the constant velocity suction flow rate is outside the permissible range. This is a continuous measurement device for soot and dust concentration.
実施例
煙道などの被測定箇所１内に装着されたノズル
２は、連結管３を介して固定式捕集管４に接続さ
れている。この固定式捕集管４と対向した位置に
は、固定式捕集管４に対して上下方向に進退し得
る昇降式捕集管５が設けられており、両捕集管
４，５の間には、巻取り手段６によつて左右方向
に移動されるばいじん捕集用の紙７が配設され
る。この紙７は、ばいじん濃度測定時には、固
定式捕集管４と昇降式捕集管５とによつて押圧さ
れ、測定部への新しい紙面の移動は、昇降式捕
集管５を下降位置に移動して固定式捕集管４との
間に〓間を形成した状態で行われる。Embodiment A nozzle 2 installed in a measurement target 1 such as a flue is connected to a fixed collection pipe 4 via a connecting pipe 3. At a position facing the fixed collection tube 4, an elevating collection tube 5 that can move up and down relative to the fixed collection tube 4 is provided, and between the two collection tubes 4 and 5. A paper 7 for collecting soot and dust, which is moved in the left-right direction by a winding means 6, is disposed. This paper 7 is pressed by the fixed collection tube 4 and the elevating collection tube 5 when measuring the dust concentration, and when a new sheet of paper is moved to the measuring section, the elevating collection tube 5 is moved to the lowered position. This is done while moving and forming a gap with the fixed collection tube 4.
昇降式捕集管５には、テフロン製などの可撓性
チユーブ８を介して並列に配設された手動式バル
ブ９と電動式バルブ１０とが接続され、これらの
バルブのうしろには、バイパスバルブ１２を備え
たガス吸引ポンプ（真空ポンプ）１１と、設定流
量検出毎にパルス信号を制御手段１４に発振する
ガスメータ１３とがその順序で接続されている。 A manual valve 9 and an electric valve 10 which are arranged in parallel are connected to the elevating collection pipe 5 through a flexible tube 8 made of Teflon or the like, and behind these valves, A gas suction pump (vacuum pump) 11 equipped with a bypass valve 12 and a gas meter 13 that oscillates a pulse signal to a control means 14 every time a set flow rate is detected are connected in that order.
制御手段１４は、ガスメータ１３からの設定流
量毎のパルス信号をカウントするカウント機構１
５と、ガスメータ１３からのパルス信号入力に要
する時間を計測する時計機構１６と、両機構から
の入力により単位時間当りの吸引流量Ｑ（／
min）を演算し、予め入力された等速吸引流量
qm（／min）と比較して電動式バルブ１０また
はガス吸引ポンプ１１に運転状態の変更を指令す
る制御装置１７とから構成されている。 The control means 14 includes a counting mechanism 1 that counts pulse signals from the gas meter 13 for each set flow rate.
5, a clock mechanism 16 that measures the time required to input the pulse signal from the gas meter 13, and the suction flow rate per unit time Q (/
min) and calculate the uniform suction flow rate input in advance.
qm (/min) and a control device 17 that instructs the electric valve 10 or the gas suction pump 11 to change the operating state.
運転状態の判断は、吸引流量についてたとえ
ば、
｛(a) Ｑ1.10qm
(b) 1.10qm＞Ｑ0.95qm (c) 0.95qm＞
Ｑ0.80qm
(d) Ｑ＜0.80qm｝ (2)
で示すような流量範囲を設定し、ｂを濃度測定範
囲内にある吸引流量とする。したがつて、この場
合には、制御装置１７から電動式バルブ１０に変
更指令は出されないが、ａ，ｃの場合には、電動
式バルブ１０にそれぞれ流量を減らす方向と増加
する方向への回転指令が出される。ｄは濃度測定
の許容範囲外の流量を示すもので、この場合に
は、ｃと同じ変更指令が出されるとともに、ｄの
範囲内にあつたことが制御装置１７に記憶され、
この吸引流量が制御装置１７に連続して３回入力
されたとき、紙７へのばいじんの付着が等速吸
引流量qmを維持することが困難になつたとして、
制御装置１７からガス吸引ポンプ１１に運転停止
指令が出される。 Judgment of the operating status is based on the suction flow rate, for example, {(a) Q1.10qm (b) 1.10qm＞Q0.95qm (c) 0.95qm＞
Q0.80qm (d) Q<0.80qm} (2) Set the flow rate range as shown in (2), and let b be the suction flow rate within the concentration measurement range. Therefore, in this case, the control device 17 does not issue a change command to the electric valve 10, but in cases a and c, the electric valve 10 is rotated in the direction of decreasing and increasing the flow rate, respectively. A command is issued. d indicates a flow rate outside the allowable range for concentration measurement; in this case, the same change command as c is issued, and the controller 17 stores that the flow rate is within the range of d;
When this suction flow rate is input to the control device 17 three times in succession, it is assumed that the adhesion of soot and dust to the paper 7 makes it difficult to maintain the uniform suction flow rate qm.
A stop command is issued from the control device 17 to the gas suction pump 11 .
次に、装置の動作について説明する。 Next, the operation of the device will be explained.
ばいじん濃度の測定開始前に前記(1)式によつて
等速吸引流量qmを算出し、制御装置１７に記憶
させる。被測定箇所１からのガス吸引時、手動式
バルブ９およびガス吸引ポンプ１１のバイパスバ
ルブ１２の調整により、ガス吸引流量Ｑを測定開
始前に算出した等速吸引流量qmに等しくする。 Before starting the measurement of soot and dust concentration, the constant velocity suction flow rate qm is calculated using the above equation (1) and is stored in the control device 17. When gas is sucked from the measurement point 1, the manual valve 9 and the bypass valve 12 of the gas suction pump 11 are adjusted to make the gas suction flow rate Q equal to the constant velocity suction flow rate qm calculated before the start of the measurement.
流量qmで設定された流量、たとえば５リツタ
ーを吸引するのに要する時間TKを求めれば、５
×60／qm（秒）となる。ガス吸引時にガスメータ
１１から所定流量毎に発振される電気信号をカウ
ント機構１５でカウントし、５リツター毎にその
所要時間TLを時計機構１６で検出すれば、TKと
TLはそれぞれqmとＱに反比例するから、これら
の時間を算出するのに設定されたリツター数に関
係なくＱ／qmTK／TLとなる。 If we calculate the flow rate set by the flow rate qm, for example, the time T K required to aspirate 5 liters, we get 5
×60/qm (seconds). If the counting mechanism 15 counts the electric signal emitted from the gas meter 11 at every predetermined flow rate during gas suction, and the clock mechanism 16 detects the required time T L for every 5 liters, T K and
Since T L is inversely proportional to qm and Q, respectively, Q/qmT K /T L is obtained regardless of the number of Ritter set to calculate these times.
したがつて、(2)式でＱをTKに、qmをTLに置き
換えれば、Ｑとqmに対する関係は、そのままTK
とTLの関係となるから、(2)式で示す流量範囲は、
同じガス量を吸引するに要する時間の割合によつ
て設定することができる。 Therefore, if we replace Q with T K and qm with T L in equation (2), the relationship between Q and qm becomes T K
Since there is a relationship between and T L , the flow rate range shown by equation (2) is
It can be set based on the ratio of time required to suck the same amount of gas.
制御装置１７に所要時間比TK／TLによつて(2)
式の流量関係を設定すれば、ｂの条件を満たすと
きは、制御装置１７から電動式バルブ１０に指令
は出されないから、等速吸引流量qmの許容範囲
内でばいじん濃度の測定が行われ、ａおよびｃの
場合には、制御装置１７から電動式バルブ１０に
出されるバルブ開度の減少および増加指令によつ
て、吸引流量Ｑは自動的にqmの許容範囲内に調
整されてばいじん濃度の測定が行われる。それ
故、無人状態で精度の高いばいじん濃度の測定を
連続して行うことができる。 Depending on the time ratio T K /T L required for the control device 17 (2)
If the flow rate relationship of the formula is set, when condition b is satisfied, no command is issued from the control device 17 to the electric valve 10, so the soot and dust concentration is measured within the allowable range of the constant velocity suction flow rate qm, In cases a and c, the suction flow rate Q is automatically adjusted to within the allowable range of qm by commands to decrease and increase the valve opening degree issued from the control device 17 to the electric valve 10, thereby reducing the soot and dust concentration. Measurements are taken. Therefore, highly accurate measurement of soot and dust concentration can be carried out continuously in an unattended state.
また、ｄで示す許容範囲外の吸引流量が連続し
て３回検出されたときは、紙７へのばいじんの
付着量が十分多くなつてばいじん濃度の測定に十
分な量のばいじんを捕集できており、吸引不要な
状態になつているのであるから、制御装置１７か
らガス吸引ポンプ１１に運転停止の指令を出し
て、無駄な吸引をなくすことができる。 In addition, when the suction flow rate outside the allowable range indicated by d is detected three times in a row, the amount of soot and dust attached to the paper 7 becomes large enough to collect enough soot and dust to measure the soot and dust concentration. Since the gas suction pump 11 is in a state where no suction is necessary, the control device 17 issues a command to stop the operation of the gas suction pump 11, thereby eliminating unnecessary suction.
考案の効果
この考案は、昇降式捕集管に接続された手動式
バルブに電動式バルブを並列に配設し、ガスメー
タから発振される設定流量毎のパルス信号により
単位時間当りの流量を演算して等速吸引流量に対
する設定された割合に応じ、電動式バルブまたは
ガス吸引ポンプに対する運転状態の変更を指令す
るようにしたものであるから、等速吸引流量の許
容範囲内において、無人状態で精度の高いばいじ
ん濃度の測定を連続して行うことができる。Effects of the invention This invention places an electric valve in parallel with a manual valve connected to an elevating collection pipe, and calculates the flow rate per unit time using a pulse signal for each set flow rate oscillated from a gas meter. This system commands the electric valve or gas suction pump to change its operating state according to the set ratio to the constant velocity suction flow rate, so the accuracy can be maintained unattended within the allowable range of the constant velocity suction flow rate. It is possible to continuously measure high soot and dust concentrations.
図はこの考案の一実施例を示す構成図である。
１……被測定箇所、２……ノズル、４……固定
捕集管、５……昇降式捕集管、６……巻取り手
段、７……紙、９……手動式バルブ、１０……
電動式バルブ、１１……ガス吸引ポンプ、１２…
…バイパスバルブ、１３……ガスメータ、１４…
…制御手段、１５……カウント機構、１６……時
計機構、１７……制御装置、qm……等速吸引流
量、Ｑ……吸引流量。
The figure is a configuration diagram showing an embodiment of this invention. DESCRIPTION OF SYMBOLS 1... Point to be measured, 2... Nozzle, 4... Fixed collection tube, 5... Elevating collection tube, 6... Winding means, 7... Paper, 9... Manual valve, 10... …
Electric valve, 11... Gas suction pump, 12...
...Bypass valve, 13...Gas meter, 14...
...control means, 15...count mechanism, 16...clock mechanism, 17...control device, qm...uniform suction flow rate, Q...suction flow rate.
Claims (1)
定捕集管を接続し、この固定捕集管に対向して
進退し得る昇降式捕集管を設け、両捕集管の間
に巻取り手段によつて移動されるばいじん捕集
用紙を配設し、前記昇降式捕集管に、並列に
接続された手動式バルブと電動式バルブ、バイ
パスバルブを備えたガス吸引ポンプ、および設
定流量検出毎にパルス信号を発生するガスメー
タをその順に設けるとともに、該パルス信号入
力により測定される単位時間当りの吸引流量が
予め入力したガスメータにおける等速吸引流量
の許容範囲内にあるとき、その流量差を解消す
る方向に前記電動式バルブの開度を調節し、等
速吸引流量の許容範囲外にあるとき、設定され
た回数の検出によりガス吸引ポンプを停止する
制御手段を設けたことを特徴とするばいじん濃
度の連続測定装置。 (2) 制御手段は、ガスメータからの設定流量毎の
パルス信号をカウントするカウント機構と、ガ
スメータからのパルス信号入力に要する時間を
計測する時計機構と、両機構からの入力により
単位時間当りの吸引流量を演算し、予め入力さ
れた等速吸引流量と比較して電動式バルブまた
はガス吸引ポンプに運転状態の変更を指令する
制御装置とからなる実用新案登録請求の範囲第
１項記載のばいじん濃度の連続測定装置。[Claims for Utility Model Registration] (1) A fixed collection tube is connected to the base end of the nozzle inserted into the measurement point, and an elevating collection tube that can move forward and backward in opposition to the fixed collection tube is provided. A dust collection paper is provided between the two collection pipes and moved by a winding means, and a manual valve, an electric valve, and a bypass valve are connected in parallel to the elevating collection pipe. A gas suction pump with a When the flow rate is within the permissible range, the opening degree of the electric valve is adjusted in a direction to eliminate the difference in flow rate, and when the constant velocity suction flow rate is outside the permissible range, the gas suction pump is stopped after a set number of detections. 1. A continuous measurement device for soot and dust concentration, characterized in that it is provided with a control means for controlling the concentration of soot and dust. (2) The control means includes a counting mechanism that counts pulse signals from the gas meter for each set flow rate, a clock mechanism that measures the time required to input the pulse signal from the gas meter, and a control device that controls the amount of suction per unit time based on the input from both mechanisms. The soot and dust concentration according to claim 1, comprising a control device that calculates the flow rate, compares it with a pre-input constant velocity suction flow rate, and instructs an electric valve or a gas suction pump to change its operating state. Continuous measurement device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4447984U JPS60156441U (en) | 1984-03-27 | 1984-03-27 | Continuous measurement device for soot and dust concentration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4447984U JPS60156441U (en) | 1984-03-27 | 1984-03-27 | Continuous measurement device for soot and dust concentration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60156441U JPS60156441U (en) | 1985-10-18 |
| JPH0249561Y2 true JPH0249561Y2 (en) | 1990-12-27 |
Family
ID=30557091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4447984U Granted JPS60156441U (en) | 1984-03-27 | 1984-03-27 | Continuous measurement device for soot and dust concentration |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60156441U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220092433A (en) | 2020-12-24 | 2022-07-01 | 주식회사 디알텍 | Radiation imaging device and radiographic imaging method using same |
-
1984
- 1984-03-27 JP JP4447984U patent/JPS60156441U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220092433A (en) | 2020-12-24 | 2022-07-01 | 주식회사 디알텍 | Radiation imaging device and radiographic imaging method using same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60156441U (en) | 1985-10-18 |
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