JPH0514205Y2 - - Google Patents

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Publication number
JPH0514205Y2
JPH0514205Y2 JP9976187U JP9976187U JPH0514205Y2 JP H0514205 Y2 JPH0514205 Y2 JP H0514205Y2 JP 9976187 U JP9976187 U JP 9976187U JP 9976187 U JP9976187 U JP 9976187U JP H0514205 Y2 JPH0514205 Y2 JP H0514205Y2
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JP
Japan
Prior art keywords
dust
shaped
electrode
fan
collection box
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 - Lifetime
Application number
JP9976187U
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Japanese (ja)
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JPS645157U (en
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Publication of JPS645157U publication Critical patent/JPS645157U/ja
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  • Measurement Of Resistance Or Impedance (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Electrostatic Separation (AREA)

Description

【考案の詳細な説明】 (産業上の利用分野) この考案は、一般産業において高性能の集塵装
置として利用される電気集塵装置の性能が、その
処理すべき固体粒子(ダスト)の見掛け電気抵抗
率に大きく左右されるところから、電気集塵装置
の入口側ダクト内に装着して、その見掛け電気抵
抗率をその場で測定できるようにした装置に係る
ものである。
[Detailed explanation of the invention] (Industrial application field) This invention is based on the idea that the performance of an electrostatic precipitator used as a high-performance dust collector in general industry depends on the appearance of solid particles (dust) to be treated. This is a device that is installed in the inlet duct of an electrostatic precipitator and can measure its apparent electrical resistivity on the spot, since it is largely influenced by electrical resistivity.

(従来の技術) 近年、排出規制の強化と相まつて、電気集塵装
置内での逆電離現象による集塵率の低下が問題と
なり、ダストの見掛け電気抵抗率(以下単に電気
抵抗率という)が減少する高温域で集塵するか又
はSO3などの調質剤を用いて電気抵抗率を下げて
集塵することが行われるようになり、このことか
ら電気集塵装置の性能を大きく左右するダストの
電気抵抗率の測定が必要となつてきている。
(Conventional technology) In recent years, along with the tightening of emission regulations, a reduction in dust collection efficiency due to reverse ionization in electrostatic precipitators has become a problem, and the apparent electrical resistivity (hereinafter simply referred to as electrical resistivity) of dust has increased. It is now possible to collect dust in a high temperature range, or use a conditioning agent such as SO 3 to lower the electrical resistivity, which greatly affects the performance of electrostatic precipitators. It is becoming necessary to measure the electrical resistivity of dust.

従来、一般に行われているダストの電気抵抗率
測定は、第6図に示す平行平板電極方式のよう
に、シヤーレー状の下部電極イ内に予め別に採取
したダストロを入れ、その上に円板状の上部電極
ハ、並びに迷走電流を取り去るための輪板状のガ
ード電極ニを載置して接地し、下部電極イを高電
圧電源ホに接続して次式によりダストの電気抵抗
率ρd(Ω・cm)を得ることができる。
Conventionally, the electrical resistivity measurement of dust is generally carried out using the parallel plate electrode method shown in Figure 6, in which a separately collected dust is placed in a Shearley-shaped lower electrode, and a disk-shaped electrode is placed on top of the dust. The upper electrode C and the ring plate-shaped guard electrode D for removing stray current are placed and grounded, and the lower electrode A is connected to a high voltage power supply E, and the electric resistivity ρd (Ω・cm) can be obtained.

ρd=V/I×S/t ここで、 V:電極間の印加電圧(V) I:〃 を流れる電流(A) t:〃 の距離(ダスト層の厚さcm) S:上部電極の面積(cm2) また、第7図に示す同心円筒電極方式を利用し
て、電気集塵装置の入口にサイクロンヘを設け、
その円錐部に連なる貯留部トの内部に同心軸状の
中心電極チ及び周壁内に埋設して円筒電極リを設
けるとともに、これを電流計Aを介して高圧電源
ヌに接続し、貯留部内に十分にダストが捕集され
た状態において試料採取を停止し、両電極間に高
電圧を印加して流れる電流を検出することによ
り、そのダクト内の雰囲気状態においてダストの
電気抵抗率を測定する方法も、最近、行われてい
る。なお、この場合の電気抵抗率ρd(Ω・cm)は
次式のように表わされる。
ρd=V/I×S/t Where, V: Applied voltage between electrodes (V) I: Current flowing through (A) t: Distance of (dust layer thickness cm) S: Area of upper electrode (cm 2 ) Also, by using the concentric cylindrical electrode system shown in Figure 7, a cyclone was installed at the inlet of the electrostatic precipitator.
A concentric center electrode and a cylindrical electrode buried in the peripheral wall are provided inside the storage part connected to the conical part, and these are connected to a high-voltage power supply through an ammeter A. A method of measuring the electrical resistivity of dust in the atmospheric conditions within the duct by stopping sample collection when sufficient dust has been collected, applying a high voltage between both electrodes, and detecting the flowing current. This has also been done recently. Note that the electrical resistivity ρd (Ω·cm) in this case is expressed as in the following equation.

ρd=V/I×2πl/In(R1/R2) ここで、 V:電極間の印加電圧(V) I:〃 を流れる電流(A) l:ダスト層の高さ(cm) R1:中心電極の半径(cm) R2:円筒電極の〃 (cm) (考案が解決しようとする問題点) しかし、上記第6図に示した実験室的方法にお
いては、用いられるダストは予め集塵装置で採取
されたものであつて、現時点における電気集塵装
置で得られるダストとは時間的に大きなずれがあ
り、かつ電気抵抗率が大きく依存するガス雰囲気
条件(特に温度、水分、SO3等)が異なるため、
この測定結果から、電気集塵装置に対する影響力
を直後に判断することはできない。
ρd=V/I×2πl/In(R 1 /R 2 ) Where, V: Applied voltage between electrodes (V) I: Current flowing through (A) l: Height of dust layer (cm) R 1 : Radius of center electrode (cm) R 2 : Radius of cylindrical electrode (cm) (Problem to be solved by the invention) However, in the laboratory method shown in Figure 6 above, the dust used is collected in advance. The dust collected by the dust equipment has a large time lag from the dust obtained by current electrostatic precipitators, and the gas atmosphere conditions (especially temperature, moisture, SO 3 etc.) are different,
From this measurement result, it is not possible to immediately determine the influence on the electrostatic precipitator.

また、第7図のサイクロンによる現場測定方法
においては、貯留部内にダスト試料の十分な量が
捕集されるまでには相当に多くの時間を要するば
かりか、サイクロンの上部の円筒部及び下部の円
錐部において起こる激しい旋回流が貯留内にも影
響を及ぼして激しく回転する結果、貯留部内での
捕集ダストは内部に凹みを有する逆円錐状とな
り、本測定対象として極めて不適当な状態を形成
する。
In addition, in the on-site measurement method using a cyclone shown in Figure 7, not only does it take a considerable amount of time to collect a sufficient amount of dust sample in the storage part, but also the upper cylindrical part and lower part of the cyclone The intense swirling flow that occurs in the conical part also affects the inside of the storage area, causing it to rotate violently, resulting in the collected dust inside the storage area becoming shaped like an inverted cone with a dent inside, creating a condition that is extremely unsuitable for this measurement. do.

しかも、大量のダストを捕集するまでの長時間
を経て1つの試料測定しか行うことができない。
ダストの見掛け電気抵抗率は、捕集ダストの性状
と同時に、そのときの排ガスの性状の影響を受け
るので、この方法によつては、捕集したダストは
それまでの長い時間の平均の意味を持ち、一方、
排ガスの組成は、捕集したあとの高電圧印加時に
影響することになり、本来、両者は電気抵抗測定
時に同時に作用すべきものでありながら、結果的
には分離した形となり、両者が時間的に変動して
いる場合には、適格な方法とはなり得ないことに
なる。
Moreover, only one sample can be measured after a long period of time until a large amount of dust is collected.
The apparent electrical resistivity of dust is affected not only by the properties of the collected dust but also by the properties of the exhaust gas at that time. have, on the other hand,
The composition of the exhaust gas will affect the application of high voltage after it has been collected. Originally, both should act simultaneously when measuring electrical resistance, but as a result they are separated, and the two are separated in time. If it fluctuates, it cannot be an eligible method.

(問題点を解決するための手段) このためには、上記貯留部に当る部分を数個の
区画室に形成させ、かつその上部に常に一室のみ
を開放状態とした回転盤により覆うようにすれ
ば、サイクロン特有の激しい旋回流の影響を排除
し、併せて短時間の試料採取により所望の電気抵
抗率を測定することができ、加えて複数個の試料
採用を電気抵抗率測定を連続して行うことができ
るわけである。
(Means for solving the problem) For this purpose, the part corresponding to the storage section is formed into several compartments, and the upper part is covered with a rotary disk that leaves only one compartment open at all times. By doing so, it is possible to eliminate the effects of the violent swirling flow characteristic of cyclones, and also to measure the desired electrical resistivity by collecting samples in a short period of time. In other words, it can be done.

(考案の実施例) この考案は上記の点に着目して開発したもので
あつて、この考案の実施例を図面について説明す
ると、第1図において1は電気集塵装置の入口に
設けられたダスト試料採取用のサイクロンであつ
て、排ガス入口2を有する円筒部3の上面に吸引
管4が設けられ、この吸引管は濾紙5を介して吸
引ポンプ6に接続されている。そして円筒部3に
連なる円錐部の下端には円筒容器状の集塵箱7が
垂下接続されており、この集塵箱7はその高さの
ほぼ1/2に当る内部に、一部に扇形状の開口部8
を有する円板状の回転板9が中心を軸支して取り
つけられ、この回転板9の下方は第2図に明らか
なように、それぞれ上記開口部に対応する大きさ
の数個の扇形状の区画室10……に分割形成され
ており、適宜の駆動機構により間欠回転される回
転板9の回転による開口部8の移動に応じて上面
が次々と集塵箱上部に連通するようになつてい
る。
(Example of the invention) This invention was developed focusing on the above points, and to explain the embodiment of this invention with reference to the drawings, in Fig. 1, 1 is installed at the entrance of the electrostatic precipitator. This is a cyclone for collecting dust samples, and a suction pipe 4 is provided on the upper surface of a cylindrical part 3 having an exhaust gas inlet 2, and this suction pipe is connected to a suction pump 6 through a filter paper 5. A cylindrical container-shaped dust collection box 7 is connected to the lower end of the conical part connected to the cylindrical part 3, and a part of the dust collection box 7 has a fan inside, which is approximately half of the height of the dust collection box 7. shaped opening 8
A disk-shaped rotary plate 9 having a central axis is attached, and as is clear from FIG. It is divided into compartments 10 . . . , and as the opening 8 moves due to the rotation of the rotary plate 9 which is intermittently rotated by an appropriate drive mechanism, the upper surface of the dust collection box comes to communicate with the upper part of the dust collection box one after another. ing.

これら区画室10……は、集塵箱7の下半部内
周面に当る周壁に沿つて設けられた円筒電極11
の内周面と、同じく下半部中心に位置して立設さ
れた円柱状の中心電極12外周面に挟まれて設け
られており、このため各扇形状の区画室10……
にはそれぞれ中心電極12と円筒電極11の各一
部が対応して位置している。そして第3図に明ら
かなように、上記円筒電極11の上下線には迷走
電流を除去するための円輪状のガード電極13,
13が設けられ、かつ上部ガード電極13の上方
にはダスト層の高さが一定に達すると作動するダ
スト高さ検知電極が付設され、さらに中心電極1
2と円筒電極11は別に設けた高電圧発生装置1
5に電流計16及び電圧計17を介挿して接続さ
れている。
These compartments 10... have cylindrical electrodes 11 provided along the peripheral wall corresponding to the inner peripheral surface of the lower half of the dust collection box 7.
It is sandwiched between the inner circumferential surface of the cylindrical center electrode 12 and the outer circumferential surface of the cylindrical center electrode 12, which is also located at the center of the lower half, and thus each fan-shaped compartment 10...
A portion of the center electrode 12 and a portion of the cylindrical electrode 11 are respectively located in the respective portions. As is clear from FIG. 3, on the upper and lower lines of the cylindrical electrode 11 are ring-shaped guard electrodes 13 for removing stray currents.
13 is provided, and a dust height detection electrode is provided above the upper guard electrode 13, which is activated when the height of the dust layer reaches a certain level.
2 and the cylindrical electrode 11 are separately provided in the high voltage generator 1.
5 through which an ammeter 16 and a voltmeter 17 are inserted.

(併用効果) この考案は上記の構造であつて間欠的に回転さ
れる回転板9の開口部8を介して集塵箱7内にダ
ストが各扇形状区画室10……内に順次収容さ
れ、この場合ダストは回転板9を介してサイクロ
ンの旋回流の影響を受けることなく収容され、こ
れが一定高さに達すると、中心電極12、円筒電
極11にわたつて高電圧発生機構により高電圧が
印加され、この電流を検出して電気抵抗率を求め
ることができる。
(Combined effect) This invention has the above-mentioned structure, and the dust is sequentially stored in the fan-shaped compartments 10 in the dust collection box 7 through the opening 8 of the rotating plate 9 which is intermittently rotated. In this case, the dust is contained through the rotary plate 9 without being affected by the swirling flow of the cyclone, and when it reaches a certain height, a high voltage is generated by the high voltage generation mechanism across the center electrode 12 and the cylindrical electrode 11. The electrical resistivity can be determined by detecting this current.

次に、第4図は、上記第1〜3図の変形例を示
す。この実施例においては、各区画室10′……
は、多数の小円筒容器として形成されている。こ
れら区画室10′……は第5図に明らかなように
回転板9の下面に重合して集塵箱7に設けられた
円板18面に上面を開口して垂設された数個の小
円筒容器として形成され、それぞれ、その内部に
中心電極12、周面に円筒電極11を有してい
る。そして、これら電極12…、11…は前記実
施例と同じく高電圧発生装置に接続されている。
Next, FIG. 4 shows a modification of the above-mentioned FIGS. 1 to 3. In this embodiment, each compartment 10'...
is formed as a number of small cylindrical containers. As is clear from FIG. 5, these compartments 10'... are composed of several compartments that overlap the lower surface of the rotary plate 9 and are vertically opened on the surface of the disk 18 provided in the dust collection box 7, with the top surface open. Each container is formed as a small cylindrical container, and each has a center electrode 12 inside and a cylindrical electrode 11 on the circumferential surface. These electrodes 12..., 11... are connected to a high voltage generator as in the previous embodiment.

この考案は以上の構造であつて、回転板9を適
宜の制御機構を介して回転することにより、各区
画室10……にダストを充填し、長時間にわたつ
て連続的に測定を行うことができる。なお、この
場合、各区画室10……の底部にダスト排出弁を
設けて反復測定させるようにすることもできる。
This device has the above structure, and by rotating the rotary plate 9 via an appropriate control mechanism, each compartment 10 is filled with dust and measurement can be carried out continuously over a long period of time. can. In this case, a dust discharge valve may be provided at the bottom of each compartment 10 for repeated measurements.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図乃至第5図はこの考案の実施例を示し、
第1図は全体側面図、第2図は第1図A−A位置
における断面平面図、第3図は第1図要部の縦断
面図、第4図は第1図の変形例を示す要部斜面
図、第5図は第4図B−B位置における断面平面
図、第6図及び第7図はそれぞれ従来の装置の断
面側面図である。 1……サイクロン、7……集塵箱、8……開口
部、9……回転板、10,10′……扇形状区画
室、区画室11……円筒電極、12……中心電
極、15……高電圧発生装置、16……電流計。
1 to 5 show examples of this invention,
Fig. 1 is an overall side view, Fig. 2 is a sectional plan view taken along the line A-A in Fig. 1, Fig. 3 is a longitudinal sectional view of the main part of Fig. 1, and Fig. 4 shows a modification of Fig. 1. FIG. 5 is a sectional plan view taken along the line B--B in FIG. 4, and FIGS. 6 and 7 are sectional side views of the conventional apparatus. 1... Cyclone, 7... Dust collection box, 8... Opening, 9... Rotating plate, 10, 10'... Fan-shaped compartment, compartment 11... Cylindrical electrode, 12... Center electrode, 15 ...High voltage generator, 16...Ammeter.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ダスト試料を採取すべきサイクロン1の円錐部
下端に円筒容器状の集塵箱7を垂設し、この集塵
箱7の内部の中心軸部に1つの共通の中心電極1
2及び内周面壁を数個に等分割した円筒電極11
を備え、これらを扇形状の同心曲面電極対とし、
かつ上面を1つの平面にそろえて開口する数個の
扇形状区画室10……に形成するとともに、集塵
箱7内部にこれら扇形状の区画室10……を覆つ
て円板の一部に開口部8を有し、この開口部8を
これら扇形状の区画室10……の上面開口面に順
次一致させて間欠回転される回転板9を軸設し、
さらに上記区画室10……の中心電極12を接地
した高電圧発生装置15に接続するともに、内周
面壁の各々の円筒電極11を接地した電流計16
に接続してなる排ガス中ダストの電気抵抗率測定
装置。
A cylindrical container-shaped dust collection box 7 is installed vertically at the lower end of the cone of the cyclone 1 from which a dust sample is to be collected, and one common central electrode 1 is attached to the central axis inside the dust collection box 7.
2 and a cylindrical electrode 11 whose inner circumferential wall is equally divided into several pieces.
and these are made into a fan-shaped concentric curved electrode pair,
In addition, several fan-shaped compartments 10 are formed with their upper surfaces aligned on one plane and opened, and a part of the disc is formed by covering these fan-shaped compartments 10 inside the dust collection box 7. A rotating plate 9 having an opening 8 and rotating intermittently is installed as a shaft so that the opening 8 sequentially coincides with the upper opening surface of the fan-shaped compartments 10.
Further, the center electrodes 12 of the compartments 10 are connected to a grounded high voltage generator 15, and each cylindrical electrode 11 on the inner circumferential wall is connected to a grounded ammeter 16.
A device for measuring electrical resistivity of dust in exhaust gas connected to.
JP9976187U 1987-06-29 1987-06-29 Expired - Lifetime JPH0514205Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9976187U JPH0514205Y2 (en) 1987-06-29 1987-06-29

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9976187U JPH0514205Y2 (en) 1987-06-29 1987-06-29

Publications (2)

Publication Number Publication Date
JPS645157U JPS645157U (en) 1989-01-12
JPH0514205Y2 true JPH0514205Y2 (en) 1993-04-15

Family

ID=31327218

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9976187U Expired - Lifetime JPH0514205Y2 (en) 1987-06-29 1987-06-29

Country Status (1)

Country Link
JP (1) JPH0514205Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011085509A (en) * 2009-10-16 2011-04-28 Mitsubishi Heavy Industries Mechatronics Systems Ltd Electric resistivity measuring device, coal combustion plant with the same, and electric resistivity measuring method thereof

Also Published As

Publication number Publication date
JPS645157U (en) 1989-01-12

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