JPH051822Y2

JPH051822Y2 -

Info

Publication number: JPH051822Y2
Application number: JP10185486U
Authority: JP
Priority date: 1986-07-02
Filing date: 1986-07-02
Publication date: 1993-01-18
Anticipated expiration: 2001-07-02
Also published as: JPS638674U

Description

【考案の詳細な説明】（産業上の利用分野）この考案は、媒塵（ダスト）を処理する電気集
塵装置の入口側ダクト内に装着して、排ガス中の
ダストを採集し、併せてその見掛け電気抵抗率を
測定できるようにした装置に係るものである。[Detailed description of the invention] (Field of industrial application) This invention relates to a device that is installed in the inlet duct of an electric dust collector that processes dust, and that can collect dust in the exhaust gas and measure its apparent electrical resistivity.

（従来の技術）公益用石炭ボイラー燃料排ガスの集塵には一般
に電気集塵装置が使用されているが、近年、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。(Prior art) Electrostatic precipitators are generally used to collect dust from public coal boiler fuel exhaust gas, but in recent years, a reduction in the dust collection rate due to reverse ionization within the electrostatic precipitator has become a problem. Dust collection has come to be carried out in high temperature ranges where the apparent electrical resistivity (hereinafter simply referred to as electrical resistivity) of dust decreases. Measurement is becoming necessary.

ダストの電気抵抗率測定は、第３図に示すよう
に、シヤーレー状の下部電極１１′内に予め別に
採取したダストa′を入れ、その上に円板状の上部
電極６′ならびに迷走電流を取り去るための輪板
状のガード電極７′を載置して接地し、下部電極
１１′を高電圧電源１７′に接続してダストの電気
抵抗率ρd＝Ｖ／Ｉ×Ｓ／ｔを得ることができる。
ここで、Ｖ：両極間の印加電圧（Ｖ）Ｉ：電極間を流れる電流（Ａ）ｔ：電極間の距離（タスト層の厚さcm）Ｓ：上部電極の面積（cm²）（考案が解決しようとする問題点）しかし、上部測定におけるダストは予めダスト
捕集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期的に
ずれがあり、かつ、電気抵抗率大きく依存するガ
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
影響力を直接判断することはできない。 To measure the electrical resistivity of dust, as shown in Fig. 3, a separately collected dust a' is placed in a Shearley-shaped lower electrode 11', and a disk-shaped upper electrode 6' and a stray current are placed on top of the dust a'. A ring plate-shaped guard electrode 7' for removal is placed and grounded, and the lower electrode 11' is connected to the high voltage power source 17' to obtain the electric resistivity ρd=V/I×S/t of the dust. I can do it.
Here, V: Applied voltage between the two electrodes (V) I: Current flowing between the electrodes (A) t: Distance between the electrodes (thickness of the tasto layer in cm) S: Area of the upper electrode (cm ² ) (problems to be solved) However, the dust in the upper measurement is collected in advance by a dust collection device, and there is a time lag from the dust obtained by current electrostatic precipitators. Since the gas atmosphere conditions (especially temperature, moisture, SO _3, etc.), which greatly depend on the resistivity, are different, it is not possible to directly judge the influence on the electrostatic precipitator from this measurement result.

（問題点を解決するための手段）このためには、所要のダスト試料の採取と電気
抵抗率の測定とを電気集塵装置に連なるダクト内
で同時に行えばよいわけであつて、この考案はこ
の点を考慮して開発したものである。(Means for solving the problem) For this purpose, it is sufficient to collect the required dust sample and measure the electrical resistivity at the same time in the duct connected to the electrostatic precipitator. It was developed with this point in mind.

（考案の実施例）この考案の実施例を図面について説明すると、
第１図に示すように、全体は、一端を吸引管１に
連ねるとともに他端を開口端とした基端部材２
と、一端に吸引ノズル３を突設するとともに他端
を開口端とした先端部材４を、それぞれ開口端を
つき合わせて締付環５により相互に接続して一体
に中空体に形成されている。(Example of the invention) An example of the invention will be explained with reference to the drawings.
As shown in FIG. 1, the whole consists of a proximal member 2 whose one end is connected to the suction tube 1 and whose other end is an open end.
and a tip member 4 having a suction nozzle 3 protruding from one end and an open end at the other end, which are connected to each other by a tightening ring 5 with their open ends abutting each other, and are integrally formed into a hollow body. .

基端部材２の内部には上記開口端に位置して円
板状の主電極６、その周囲に輪状のガード電極
７′が支持材８を介して固定されている。 Inside the base member 2, a disk-shaped main electrode 6 is located at the open end, and a ring-shaped guard electrode 7' is fixed around the disk-shaped main electrode 6 via a support member 8.

先端部材４の内部には、先端（第１図において
上端）に可動電極支持棒９が可動機構１０により
一端を常時外方に突出するように挿通され、その
他端に固着された平板状の可動電極１１を操作制
御器１２を作動することにより可動機構１０に抗
して前記主電極６に重合できるようになつてい
る。なお１３…は絶縁物よりなるパツキンであ
る。 Inside the tip member 4, a movable electrode support rod 9 is inserted into the tip (upper end in FIG. 1) by a movable mechanism 10 so that one end always projects outward, and a movable flat plate fixed to the other end. The electrode 11 can be superimposed on the main electrode 6 against the movable mechanism 10 by operating the operation controller 12 . Note that 13... is a gasket made of an insulating material.

基端部材２と先端部材４にはそれぞれ開口端を
挾んで圧力取出し孔１４，１５が開設され、両端
材２，４内の圧力差を検出できるようになつてい
る。 Pressure extraction holes 14 and 15 are formed in the proximal end member 2 and the distal end member 4, respectively, sandwiching the open ends thereof, so that the pressure difference within the end members 2 and 4 can be detected.

（作用、効果）この考案は上記の構造を有し、次のようにして
使用される。すなわち基端部材２の開口端に、主
電極６、ガード電極７の導電性多孔板を重ねてそ
の上に円形のカーボンフアイバー等の導電性繊維
からなる導電性濾紙１６を重ね、次いで先端部材
４の開口端を重ね、締付環５で接続５で接続し、
かつ可動電極１１と主電極６、ガード電極７とを
高電圧電源１７に接続するとともに、圧力取出し
孔１４１，１５を圧力検査装置１８に配管して第
１図の状態としたのち、これを第２図のように電
気集塵装置の入口側のダクト１９に、その測定孔
から挿入してダクト１９内に位置させ、吸引管１
をガス洗浄器２０を介して吸引ポンプ２１、流量
測定器２２に接続するとともに可動電極支持棒９
を外部に設けた操作制御器２３に接続する。２４
は圧力損失検出器、２５は電気抵抗率測定用電気
装置である。(Operation, Effect) This invention has the above structure and is used in the following manner. That is, the conductive porous plates of the main electrode 6 and the guard electrode 7 are stacked on the open end of the proximal end member 2, and a conductive filter paper 16 made of a circular conductive fiber such as carbon fiber is stacked thereon, and then the distal end member 4 is stacked. Overlap the open ends of and connect with connection 5 using tightening ring 5,
After connecting the movable electrode 11, the main electrode 6, and the guard electrode 7 to the high voltage power source 17, and piping the pressure outlet holes 141 and 15 to the pressure testing device 18 to obtain the state shown in FIG. As shown in Figure 2, insert the suction pipe 1 into the duct 19 on the inlet side of the electrostatic precipitator through its measurement hole and position it inside the duct 19.
is connected to the suction pump 21 and the flow rate measuring device 22 via the gas washer 20, and the movable electrode support rod 9
is connected to an external operation controller 23. 24
2 is a pressure loss detector, and 25 is an electrical device for measuring electrical resistivity.

こうして、試料ガス中のダストａを濾紙１６面
に濾過分離させ、前記圧力差検出装置１８を介し
て濾紙１６の前後の圧力差を検出してダストが一
定の捕集量に達したのを検知したのち、吸引作用
を停止し、次いで操作制御器２３を介して可動電
極１１をダスト捕集面に密着させ、高電圧を印加
することにより、捕集ダスト層の見掛け電気抵抗
率を外部から知ることができる。 In this way, the dust a in the sample gas is filtered and separated on the surface of the filter paper 16, and the pressure difference across the filter paper 16 is detected via the pressure difference detection device 18 to detect when a certain amount of dust has been collected. After that, the suction action is stopped, and then the movable electrode 11 is brought into close contact with the dust collection surface via the operation controller 23, and a high voltage is applied to determine the apparent electrical resistivity of the collected dust layer from the outside. be able to.

このように、この考案においては、電気抵抗率
測定装置がダスト捕集器内に組み込まれているた
め、ダスト試料の採取と電気抵抗率の測定をダク
ト内で随時行うことができ、極めて効率的であ
る。 In this way, in this invention, the electrical resistivity measuring device is built into the dust collector, so dust samples can be collected and the electrical resistivity can be measured at any time inside the duct, making it extremely efficient. It is.

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

第１図は側面断面図、第２図は使用状態を示す
平面図、第３図は従来の電気抵抗測定装置の側面
断面図である。１……吸引管、２……基端部材、３……吸引ノ
ズル、４……先端部材、５……締付環、６……主
電極、７……ガード電極、９……可動電極支持
棒、１０……可動機構、１１……可動電極、１２
……操作制御器、１４，１５……圧力取出し孔、
１６……導電性濾紙、１７……高電圧電源、１８
……圧力差検出装置、２１……吸引ポンプ。 FIG. 1 is a side sectional view, FIG. 2 is a plan view showing the state of use, and FIG. 3 is a side sectional view of a conventional electrical resistance measuring device. DESCRIPTION OF SYMBOLS 1... Suction tube, 2... Base end member, 3... Suction nozzle, 4... Tip member, 5... Tightening ring, 6... Main electrode, 7... Guard electrode, 9... Movable electrode support Rod, 10...Movable mechanism, 11...Movable electrode, 12
...Operation controller, 14,15...Pressure extraction hole,
16... Conductive filter paper, 17... High voltage power supply, 18
...Pressure difference detection device, 21...Suction pump.

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

一端が吸引管１に連なり他端開口する基端部材
２と一端に吸引ノズル３を突設し他端開口する先
端部材４を、それぞれ開口端を中間に円形の濾紙
１６を挾止して締付環５により接続するダスト捕
集器として形成され、これら両部材２，４は圧力
差検出用の圧力取出し孔１４，１５を有するとと
もに、基端部材２の内部には濾紙１６に接して円
板状の主電極６ならびに輪状のガード電極７が固
定され、また先端部材４の内部には可動機構１０
により常時離間され、可動機構１０に抗して濾紙
１６面に重合可能の可動電極１１が、操作制御器
１２により外部から操作可能に設けられているダ
ストの電気抵抗率測定装置。 A proximal end member 2 with one end connected to the suction tube 1 and an open end, and a distal end member 4 with a suction nozzle 3 protruding from one end and an open end with a circular filter paper 16 interposed between the open ends and tightened. It is formed as a dust collector connected by an attached ring 5, and both of these members 2 and 4 have pressure extraction holes 14 and 15 for detecting a pressure difference, and a circular hole is provided inside the base end member 2 in contact with the filter paper 16. A plate-shaped main electrode 6 and a ring-shaped guard electrode 7 are fixed, and a movable mechanism 10 is installed inside the tip member 4.
A dust electrical resistivity measuring device is provided with a movable electrode 11 which is always spaced apart and can be superimposed on the surface of a filter paper 16 against a movable mechanism 10 and can be operated from the outside by an operation controller 12.