JPH07213838A - Device for protecting bag filter of waste gas treating device - Google Patents
Device for protecting bag filter of waste gas treating deviceInfo
- Publication number
- JPH07213838A JPH07213838A JP1626594A JP1626594A JPH07213838A JP H07213838 A JPH07213838 A JP H07213838A JP 1626594 A JP1626594 A JP 1626594A JP 1626594 A JP1626594 A JP 1626594A JP H07213838 A JPH07213838 A JP H07213838A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- bag filter
- temp
- waste gas
- gas treatment
- 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.)
- Withdrawn
Links
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、都市ごみ焼却炉、下水
汚泥焼却炉、産業廃棄物焼却炉、ボイラー及びディーゼ
ルエンジンなどに適用される排ガス処理装置用バグフィ
ルター保護装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag filter protection device for an exhaust gas treatment device applied to an incinerator for municipal solid waste, an incinerator for sewage sludge, an incinerator for industrial waste, a boiler, a diesel engine and the like.
【０００２】[0002]
【従来の技術】従来の一般的なバグフィルター排ガス処
理装置は、図２（ａ）に示すように入口ダクト１３が焼
却炉等に接続された減温塔１４の出口ダクト２３にその
入口ダクト１１が接続され、上部に出口ダクト１２が設
けられ、内部にバグフィルター９が配設されていた。2. Description of the Related Art In a conventional general bag filter exhaust gas treatment apparatus, as shown in FIG. 2A, an inlet duct 13 is connected to an outlet duct 23 of a temperature reducing tower 14 connected to an incinerator or the like. Was connected, the outlet duct 12 was provided in the upper part, and the bag filter 9 was arrange | positioned inside.
【０００３】上記において、焼却炉等からの高温排ガス
は減温塔１４の入口ダクト１３を通って減温塔１４内へ
流れ込み、減温ノズル１５の水噴霧によって減温され、
減温塔出口ダクト２３へと流れて行く。In the above, the high temperature exhaust gas from the incinerator or the like flows into the temperature reducing tower 14 through the inlet duct 13 of the temperature reducing tower 14 and is cooled by the water spray of the temperature reducing nozzle 15.
It flows to the cooling duct outlet duct 23.
【０００４】この減温ガスの温度制御は、出口ダクト２
３に設けられた熱電対（温度計）１７より温度信号を入
力した水量調節器１８が減温塔１４内に噴霧される水量
を調節することにより行われ、排ガスの温度は１２０〜
２４０℃に制御されている。The temperature control of the temperature-reduced gas is performed by the outlet duct 2
A water amount controller 18 to which a temperature signal is input from a thermocouple (thermometer) 17 provided in No. 3 is performed by adjusting the amount of water sprayed in the temperature reducing tower 14, and the temperature of the exhaust gas is 120 to
It is controlled at 240 ° C.
【０００５】１２０〜２４０℃に制御された排ガスは、
バグフィルター排ガス処理装置８の入口ダクト１１を通
ってバグフィルター９へ流れ込むが、この排ガス中には
バグフィルター９の保護剤や消石灰が供給ブロワー１
９、反応剤定量供給機２０、供給ライン２１、供給ノズ
ル２２を使って必要量供給される。The exhaust gas controlled at 120 to 240 ° C.
Although it flows into the bag filter 9 through the inlet duct 11 of the bag filter exhaust gas treatment device 8, a protective agent for the bag filter 9 and slaked lime are supplied into the exhaust gas blower 1
The required amount is supplied by using 9, the reagent constant amount feeder 20, the feed line 21, and the feed nozzle 22.
【０００６】消石灰等の反応剤を含んだ排ガス２８は、
バグフィルター排ガス処理装置８の入口ダクト１１を通
って、図２（ｂ）に示すようにバグフィルター９に付着
した消石灰層２７と反応し、排ガス中に含まれるダスト
も同時に除去されてクリーンガス２９となり、処理ガス
出口ダクト１２を通って大気へ放出される。The exhaust gas 28 containing a reactive agent such as slaked lime is
As shown in FIG. 2B, it reacts with the slaked lime layer 27 adhering to the bag filter 9 through the inlet duct 11 of the bag filter exhaust gas treatment device 8, and the dust contained in the exhaust gas is also removed at the same time to clean gas 29. And is discharged to the atmosphere through the processing gas outlet duct 12.
【０００７】なお、図中の１０，１６は逆洗灰及びダス
ト等の排出装置、２４は逆洗ノズル、２５は同ノズル２
４の圧縮空気用電磁弁であり、これらは、バグフィルタ
ー９に付着した付着灰を一定時間毎に払い落とすもので
あり、また、２６はバグフィルターの保護層である。In the figure, 10 and 16 are devices for discharging backwash ash and dust, 24 is a backwash nozzle, and 25 is the same nozzle 2
4 is a solenoid valve for compressed air, which removes the adhered ash adhering to the bag filter 9 at regular intervals, and 26 is a protective layer of the bag filter.
【０００８】[0008]
【発明が解決しようとする課題】従来のバグフィルター
排ガス処理装置において、内部に配設されるバグフィル
ター、特にガラス繊維バグフィルターは、排ガスが２６
０℃以上の高温の場合は、一部の繊維が断線し強度が低
下するために長時間の使用に耐えられず、また、１００
℃以下の低温の場合には、バグフィルターに付着した付
着層が吸湿し、逆洗による付着灰の払い落とし能力がな
くなり、バグフィルターの差圧が上昇するという課題が
あった。In the conventional bag filter exhaust gas treating apparatus, the bag filter, particularly the glass fiber bag filter, disposed inside has 26% exhaust gas.
If the temperature is higher than 0 ° C, some of the fibers will be broken and the strength will decrease, so that it cannot withstand long-term use.
In the case of a low temperature of ℃ or less, there is a problem that the adhesion layer adhered to the bag filter absorbs moisture, loses the ability to remove adhered ash by backwashing, and raises the differential pressure of the bag filter.
【０００９】本発明は、上記課題を解決するため、排ガ
ス処理装置に使用するバグフィルターが排ガス温度の異
常な高温及び低温から保護され、同一バグフィルターの
長期間の使用を可能とする装置を提供しようとするもの
である。In order to solve the above problems, the present invention provides an apparatus for protecting a bag filter used in an exhaust gas treatment apparatus from abnormally high and low exhaust gas temperatures, and enabling the same bag filter to be used for a long period of time. Is what you are trying to do.
【００１０】[0010]
【課題を解決するための手段】本発明の排ガス処理装置
用バグフィルター保護装置は、焼却炉より反応剤噴射装
置が設けられた入口ダクトを介して排ガスが供給され、
出口ダクトを介して排出し、内部にバグフィルターが設
けられた排ガス処理装置において、上記入口ダクトと出
口ダクトの間に接続されたバイパスライン、同バイパス
ラインの入口側と出口側にそれぞれ設けられた第１と第
２のダンパ、上記入口ダクトのバイパスラインとの接続
部より排ガス処理装置側に設けられた第３のダンパ、上
記出口ダクトのバイパスラインとの接続部より排ガス処
理装置側に設けられた第４のダンパ、上記入口ダクトの
第３のダンパを挟んで反排ガス処理装置側となる位置に
設けられた温度センサ、および同温度センサより温度信
号を入力しそれが所定の温度範囲外となった場合に第１
と第２のダンパを開とし第３と第４のダンパを閉とし焼
却炉と反応剤噴射装置を停止する制御発信器を備えたこ
とを特徴としている。The bag filter protection device for an exhaust gas treatment device of the present invention is such that exhaust gas is supplied from an incinerator through an inlet duct provided with a reactant injection device,
In an exhaust gas treatment device that discharges through an outlet duct and has a bag filter inside, a bypass line connected between the inlet duct and the outlet duct, and an inlet side and an outlet side of the bypass line, respectively. First and second dampers, a third damper provided on the exhaust gas treatment device side with respect to the connection portion with the bypass line of the inlet duct, and a third damper provided on the exhaust gas treatment device side with respect to the connection portion with the bypass line of the outlet duct. A fourth damper, a temperature sensor provided at a position on the side opposite to the exhaust gas treatment device with the third damper of the inlet duct interposed therebetween, and a temperature signal is input from the temperature sensor to detect that the temperature signal is out of a predetermined temperature range. If it becomes 1st
And a control transmitter for opening the second damper and closing the third and fourth dampers and stopping the incinerator and the reactant injection device.
【００１１】[0011]
【作用】上記において、温度センサが検出する排ガスの
温度が所定の温度範囲内の場合には、第１と第２のダン
パは閉、第３と第４のダンパは開となっており、反応剤
噴射装置により反応剤が添加された排ガスは排ガス処理
装置を通過し、バグフィルターによりダスト等が除去さ
れ、クリーンガスとなって排出される。In the above, when the temperature of the exhaust gas detected by the temperature sensor is within the predetermined temperature range, the first and second dampers are closed, the third and fourth dampers are open, and the reaction The exhaust gas to which the reaction agent has been added by the agent injection device passes through the exhaust gas treatment device, dust and the like are removed by the bag filter, and the gas is discharged as clean gas.
【００１２】上記温度センサが検出した温度が所定の範
囲外となると、これを入力した制御発信器は予め記憶さ
れている設定温度範囲と比較して異常温度であると判定
し、第１と第２のダンパを開、第３と第４のダンパを閉
とし、焼却炉と反応剤噴射装置を停止し、排ガスの通過
経路を排ガス処理装置へ切換え、その後、反応剤が添加
された排ガスの供給を停止する。When the temperature detected by the temperature sensor is out of a predetermined range, the control transmitter which has input this temperature compares it with a preset temperature range stored in advance and determines that it is an abnormal temperature. The second damper is opened, the third and fourth dampers are closed, the incinerator and the reactant injection device are stopped, the passage of the exhaust gas is switched to the exhaust gas treatment device, and then the exhaust gas to which the reactant is added is supplied. To stop.
【００１３】そのため、バグフィルターは異常温度にさ
らされることがなくなり、高温ガスに接触した場合の寿
命低下や、低温ガスに接触した場合の吸湿灰払い落しの
ための再生費用の増加の防止が可能となる。Therefore, the bag filter is not exposed to an abnormal temperature, and it is possible to prevent the life of the bag filter from being shortened when it comes into contact with a high temperature gas and the increase of regeneration cost for removing the absorbed ash when it comes into contact with a low temperature gas. Becomes
【００１４】[0014]
【実施例】本発明の一実施例を図１により説明する。な
お、本実施例は、入口ダクト１３が焼却炉等に接続され
た減温塔１４の出口ダクト２３にその入口ダクト１１が
接続され、同入口ダクト１１には供給ブロワー１９と反
応剤定量供給機２０と反応剤供給ライン２１とともに反
応剤噴射装置を形成する反応剤供給ノズル２２が設けら
れ、上部に出口ダクト１２が設けられ、内部にバグフィ
ルター９が配設された従来のバグフィルター排ガス処理
装置８に適用されるものであり、この部分の作用は従来
の装置と同様のため、その説明を省略する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. In the present embodiment, the inlet duct 11 is connected to the outlet duct 23 of the temperature reducing tower 14 in which the inlet duct 13 is connected to an incinerator or the like, and the inlet duct 11 is connected to the supply blower 19 and the reagent constant quantity feeder. A conventional bag filter exhaust gas treatment apparatus in which a reactant supply nozzle 22 that forms a reactant injection device with 20 and a reactant supply line 21 is provided, an outlet duct 12 is provided in an upper portion, and a bag filter 9 is provided therein. 8 and the operation of this part is the same as that of the conventional device, and therefore its explanation is omitted.
【００１５】図１に示す本実施例においては、バグフィ
ルター排ガス処理装置８の入口ダクト１１と出口ダクト
１２の間に接続されたバイパスライン７、同バイパスラ
イン７の入口側と出口側にそれぞれ設けられた開閉ダン
パ５，６、上記入口ダクト１１のバイパスライン７との
接続部より排ガス処理装置８側に設けられた開閉ダンパ
３、上記出口ダクト１２のバイパスライン７との接続部
より排ガス処理装置８側に設けられた開閉ダンパ４、上
記入口ダクト１１の開閉ダンパ４より減温塔１４側に設
けられた熱電対１、同熱電対１より温度信号を入力し上
記開閉ダンパ３，４，５，６の開閉と供給ブロワー１９
と反応剤定量供給機２０と焼却炉等の停止を行う制御発
信器２を備えている。In this embodiment shown in FIG. 1, a bypass line 7 connected between an inlet duct 11 and an outlet duct 12 of a bag filter exhaust gas treatment device 8 is provided on the inlet side and the outlet side of the bypass line 7, respectively. The opening / closing dampers 5 and 6 and the opening / closing damper 3 provided on the exhaust gas treatment device 8 side of the connection portion of the inlet duct 11 with the bypass line 7 and the connecting portion of the outlet duct 12 with the bypass line 7 of the exhaust gas treatment device. The open / close damper 4 provided on the 8 side, the thermocouple 1 provided on the temperature reducing tower 14 side of the open / close damper 4 of the inlet duct 11, and the open / close dampers 3, 4, 5 by inputting a temperature signal from the thermocouple 1 , 6 opening and closing and supply blower 19
And a control transmitter 2 for stopping the reactant constant quantity feeder 20 and the incinerator.
【００１６】上記において、バグフィルター排ガス処理
装置８入口の排ガス温度は、減温塔１４の出口ダクト２
３に設けられた熱電対１７にて検出し、減温ノズル１５
での水噴霧量を水量調節器１８で調節することにより行
うが、減温塔１４の温度制御に問題が生じ、排ガス処理
装置８内に設けたバグフィルター９の使用温度範囲（１
２０〜２４０℃）外となることがある。In the above, the temperature of the exhaust gas at the inlet of the bag filter exhaust gas treatment device 8 is determined by the outlet duct 2 of the temperature reducing tower 14.
The thermocouple 17 provided in No. 3 detects the temperature decrease nozzle 15
It is carried out by adjusting the amount of water sprayed by the water amount adjuster 18, but there arises a problem in the temperature control of the temperature reducing tower 14, and the operating temperature range of the bag filter 9 provided in the exhaust gas treatment device 8 (1
20 to 240 ° C) outside.
【００１７】この場合は、排ガス処理装置入口ダクト１
１に設けられたバグフィルター保護用の熱電対１がそれ
を検出し、異常温度（１２０〜２４０℃を外れた温度）
が１分〜１０分間継続したときに、バグフィルター保護
用制御発信器（制御発信器には予め１２０〜２４０℃の
温度範囲を記憶させておき、温度がその範囲以外になる
と制御発信器は信号を出力する）２が信号を出力し、排
ガス処理装置８の入口ダクト１１及び出口ダクト１２の
開閉ダンパ３，４を閉とし、バイパスライン７の出入口
の開閉ダンパ５，６を開とし、強制的及び一時的に排ガ
スをバイパスライン７に切り換え、排ガスの異常温度か
らバグフィルター９を保護する。In this case, the exhaust gas treatment device inlet duct 1
The thermocouple 1 for protecting the bag filter provided in 1 detects it, and abnormal temperature (temperature outside 120 to 240 ° C)
When the temperature continues for 1 to 10 minutes, a bag filter protection control oscillator (a temperature range of 120 to 240 ° C is stored in advance in the control oscillator, and when the temperature is outside the range, the control oscillator sends a signal. 2) outputs a signal to close the opening / closing dampers 3, 4 of the inlet duct 11 and the outlet duct 12 of the exhaust gas treatment device 8 and open the opening / closing dampers 5, 6 of the inlet / outlet of the bypass line 7 forcibly. Also, the exhaust gas is temporarily switched to the bypass line 7 to protect the bag filter 9 from the abnormal temperature of the exhaust gas.
【００１８】また、上記制御発信器２は、供給ブロワー
１９、反応剤定量供給機２０、及び焼却炉等へ停止信号
を出力し、それぞれの運転を一時停止させ、反応剤が含
まれた排気ガスの大気中への放出を防止する。Further, the control transmitter 2 outputs a stop signal to the supply blower 19, the reactant quantitative feeder 20, the incinerator, etc. to temporarily suspend the operation of the exhaust gas containing the reactant. To prevent its release into the atmosphere.
【００１９】なお、開閉ダンパ３，４，５，６の切換え
後、バイパスライン７を介して一時的に排気ガスが大気
中に排出されるが、これは炉停止までの間に発生したも
のであり、その量は非常に少なく、大気中に排出される
排ガスが規制値を超えるおそれはない。After switching the open / close dampers 3, 4, 5 and 6, exhaust gas is temporarily discharged into the atmosphere through the bypass line 7. This is generated before the furnace is shut down. Yes, the amount is very small, and there is no possibility that the exhaust gas discharged into the atmosphere will exceed the regulation value.
【００２０】[0020]
【発明の効果】本発明の排気ガス処理装置用バグフィル
ター保護装置は、排ガス処理装置に接続された入口ダク
トと出口ダクトの間に設けられたバイパスラインと、排
ガスの通過経路を排ガス処理装置からバイパスラインに
切換える第１と第２と第３と第４のダンパと、入口ダク
トに設けられた温度センサより温度信号を入力しそれぞ
れのダンパを開閉し焼却炉と反応剤噴射装置を停止する
制御発信器を備えたことによって、排ガス温度が異常と
なった場合、バグフィルターはその温度にさらされるこ
とがなくなり、高温ガスに接触した場合の寿命低下や、
低温ガスに接触した場合の吸湿灰払い落しのための再生
費用の増加の防止が可能となる。The bag filter protection device for an exhaust gas treatment device of the present invention has a bypass line provided between an inlet duct and an outlet duct connected to the exhaust gas treatment device and an exhaust gas passage from the exhaust gas treatment device. Control for inputting temperature signals from the first, second, third, and fourth dampers that switch to the bypass line and the temperature sensor provided in the inlet duct to open and close each damper to stop the incinerator and the reactant injection device. By providing a transmitter, if the exhaust gas temperature becomes abnormal, the bag filter will not be exposed to that temperature, the life will be shortened when it comes into contact with high temperature gas,
It is possible to prevent an increase in regeneration cost for removing the hygroscopic ash when it comes into contact with a low temperature gas.
【図１】本発明の一実施例に係る排ガス処理装置用バグ
フィルター保護装置の説明図である。FIG. 1 is an explanatory diagram of a bag filter protection device for an exhaust gas treatment device according to an embodiment of the present invention.
【図２】従来の排ガス処理装置の説明図で、（ａ）は全
体図、（ｂ）はバグフィルターの断面図である。FIG. 2 is an explanatory view of a conventional exhaust gas treatment apparatus, (a) is an overall view, and (b) is a cross-sectional view of a bag filter.
１ 熱電対 ２ 制御発信器 ３，４，５，６ 開閉ダンパ ７ バイパスライン ８ 排ガス処理装置 ９ バグフィルター １０ 逆洗灰排出装置 １１ 入口ダクト １２ 出口ダクト １３ 減温塔入口ダクト １４ 減温塔 １５ 減温ノズル １６ ダスト排出装置 １７ 減温ガス用熱電対 １８ 水量調節器 １９ 供給ブロワー ２０ 反応剤定量供給機 ２１ 反応剤供給ライン ２２ 反応剤供給ノズル ２３ 減温ガス出口ダクト ２４ 逆洗ノズル ２５ 圧縮空気用電磁弁 1 Thermocouple 2 Control Transmitter 3, 4, 5, 6 Switching Damper 7 Bypass Line 8 Exhaust Gas Treatment Device 9 Bag Filter 10 Backwash Ash Discharge Device 11 Inlet Duct 12 Outlet Duct 13 Dehumidifying Tower Inlet Duct 14 Dehumidifying Tower 15 Decreasing Warm nozzle 16 Dust discharge device 17 Thermocouple for dehumidified gas 18 Water quantity controller 19 Supply blower 20 Reactant constant quantity feeder 21 Reagent supply line 22 Reagent supply nozzle 23 Dehumidified gas outlet duct 24 Backwash nozzle 25 For compressed air solenoid valve
Claims (1)
入口ダクトを介して排ガスが供給され、出口ダクトを介
して排出し、内部にバグフィルターが設けられた排ガス
処理装置において、上記入口ダクトと出口ダクトの間に
接続されたバイパスライン、同バイパスラインの入口側
と出口側にそれぞれ設けられた第１と第２のダンパ、上
記入口ダクトのバイパスラインとの接続部より排ガス処
理装置側に設けられた第３のダンパ、上記出口ダクトの
バイパスラインとの接続部より排ガス処理装置側に設け
られた第４のダンパ、上記入口ダクトの第３のダンパを
挟んで反排ガス処理装置側となる位置に設けられた温度
センサ、および同温度センサより温度信号を入力しそれ
が所定の温度範囲外となった場合に第１と第２のダンパ
を開とし第３と第４のダンパを閉とし焼却炉と反応剤噴
射装置を停止する制御発信器を備えたことを特徴とする
排ガス処理装置用バグフィルター保護装置。1. An exhaust gas treatment apparatus in which an exhaust gas is supplied from an incinerator through an inlet duct provided with a reactant injection device, discharged through an outlet duct, and internally provided with a bag filter, wherein the inlet duct is provided. A bypass line connected between the bypass duct and the outlet duct, first and second dampers respectively provided on the inlet side and the outlet side of the bypass line, and on the exhaust gas treatment device side from the connection portion between the bypass line of the inlet duct. The third damper provided, the fourth damper provided on the exhaust gas treatment device side with respect to the connection portion with the bypass line of the outlet duct, and the third damper of the inlet duct sandwich the anti-exhaust gas treatment device side. A temperature sensor provided at a position, and when a temperature signal is input from the temperature sensor and is out of a predetermined temperature range, the first and second dampers are opened and the third and fourth dampers are opened. A bag filter protection device for an exhaust gas treatment device, which is equipped with a control transmitter that closes the damper of the above and shuts down the incinerator and the reactant injection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1626594A JPH07213838A (en) | 1994-02-10 | 1994-02-10 | Device for protecting bag filter of waste gas treating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1626594A JPH07213838A (en) | 1994-02-10 | 1994-02-10 | Device for protecting bag filter of waste gas treating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07213838A true JPH07213838A (en) | 1995-08-15 |
Family
ID=11911731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1626594A Withdrawn JPH07213838A (en) | 1994-02-10 | 1994-02-10 | Device for protecting bag filter of waste gas treating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07213838A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100771654B1 (en) * | 2006-04-20 | 2007-10-30 | 주식회사 가온솔루션 | Impinger controll system |
| JP2008132424A (en) * | 2006-11-28 | 2008-06-12 | Mitsui Eng & Shipbuild Co Ltd | Exhaust gas-treating device and operating method of waste treatment facility equipped with the same |
| CN102847393A (en) * | 2012-09-27 | 2013-01-02 | 徐州天地重型机械制造有限公司 | Main dust collector protection device and method of drying machine |
-
1994
- 1994-02-10 JP JP1626594A patent/JPH07213838A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100771654B1 (en) * | 2006-04-20 | 2007-10-30 | 주식회사 가온솔루션 | Impinger controll system |
| JP2008132424A (en) * | 2006-11-28 | 2008-06-12 | Mitsui Eng & Shipbuild Co Ltd | Exhaust gas-treating device and operating method of waste treatment facility equipped with the same |
| CN102847393A (en) * | 2012-09-27 | 2013-01-02 | 徐州天地重型机械制造有限公司 | Main dust collector protection device and method of drying machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010508 |