JPH05115727A - Method and apparatus for shaking off dust in bag filter - Google Patents
Method and apparatus for shaking off dust in bag filterInfo
- Publication number
- JPH05115727A JPH05115727A JP31193191A JP31193191A JPH05115727A JP H05115727 A JPH05115727 A JP H05115727A JP 31193191 A JP31193191 A JP 31193191A JP 31193191 A JP31193191 A JP 31193191A JP H05115727 A JPH05115727 A JP H05115727A
- Authority
- JP
- Japan
- Prior art keywords
- differential pressure
- pressure value
- measured
- dust
- bag filter
- 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.)
- Pending
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、バグフィルターの濾布
に堆積したダストを的確且つ効率的に払落すことができ
るバグフィルターにおけるダストの払落し方法およびそ
の装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust filter method and apparatus for a bag filter, which can remove dust accumulated on a filter cloth of the bag filter accurately and efficiently.
【０００２】[0002]
【従来の技術】バグフィルターは、例えば焼却炉などの
排ガス処理用として広く使用されているが、連続して長
時間使用し続けると濾布に堆積したダストによって圧力
損失を生じるために周期的なダストの払落し作業を行う
必要があり、その方法としてタイマー等により一定時間
毎に一定数の濾布を順に払落し処理する方法と、濾布の
差圧を検知して所定の圧力損失になった場合に一定数あ
るいは全数の濾布の払落し処理をする方法とが一般的に
知られている。2. Description of the Related Art Bag filters are widely used for treating exhaust gas in, for example, incinerators, but when they are used continuously for a long time, dust accumulated on a filter cloth causes a pressure loss, which causes a periodical loss. It is necessary to perform dust removal work, and as a method therefor, a method of sequentially removing a certain number of filter cloths at regular time intervals with a timer etc. and a method of detecting the differential pressure of the filter cloths and causing a predetermined pressure loss. In this case, a method of removing a fixed number or all of the filter cloths is generally known.
【０００３】ところが、前者の方法においてはバグフィ
ルターの負荷の程度にかかわらず一定時間毎に払落し処
理を行うために濾布に必要以上のダメージを与えて寿命
を短くする場合があるという問題点があり、一方、後者
の方法においては処理すべきガス量の変動により、払落
し頻度が変動するためバグフィルターの集塵効率および
ガスの吸収効率が著しく低下する場合があるという問題
点があった。In the former method, however, the filter cloth may be removed at regular intervals regardless of the load on the bag filter, so that the filter cloth may be damaged more than necessary and its life may be shortened. On the other hand, the latter method has a problem that the dust collection efficiency and the gas absorption efficiency of the bag filter may be remarkably lowered due to the fluctuation of the cleaning frequency due to the fluctuation of the gas amount to be treated. ..
【０００４】[0004]
【発明が解決しようとする課題】本発明は上記のような
従来の問題点を解決して、バグフィルターの負荷に対応
して濾布に堆積したダストを的確に払落すことができる
とともに、処理すべきガス量の変動があっても集塵効率
の低下や吸収効率の低下を発生させることなく効率的に
ダストを払落すことができるバグフィルターにおけるダ
ストの払落し方法およびその装置を提供することを目的
として完成されたものである。DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art so that dust accumulated on the filter cloth can be appropriately removed in accordance with the load of the bag filter, and the treatment can be performed. To provide a dust removal method and an apparatus for a bag filter that can remove dust efficiently without causing a reduction in dust collection efficiency or a reduction in absorption efficiency even if there is a change in the amount of gas to be used. It was completed for the purpose of.
【０００５】[0005]
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明は、バグフィルターにおける濾布の
差圧を測定してこの測定差圧値を処理ガスの流量に対応
して計算された基準差圧値と比較し、前記測定差圧値が
基準差圧値を超えた場合にダストの払落し処理を行うよ
うにしたことを特徴とするバグフィルターにおけるダス
トの払落し方法を第１の発明とし、濾布の差圧を測定し
て測定差圧値を検出する差圧測定器と該差圧測定器に連
結されて前記測定差圧値を基準差圧値と比較し一定条件
下でダストの払落し処理装置を作動させる制御装置とか
らなり、該制御装置は処理ガスの流量を測定する流量計
と連結されてその測定値に対応して基準差圧値を計算す
る手段を有していることを特徴とするを第２の発明とす
るものである。SUMMARY OF THE INVENTION The present invention, which has been made to solve the above problems, measures the differential pressure of a filter cloth in a bag filter and calculates the measured differential pressure value corresponding to the flow rate of a processing gas. Compared with the reference differential pressure value, the dust removal method in the bag filter, characterized in that the dust removal processing is performed when the measured differential pressure value exceeds the reference differential pressure value. According to the first aspect of the present invention, a differential pressure measuring device that measures a differential pressure of a filter cloth to detect a measured differential pressure value and a differential pressure measuring device that is connected to the differential pressure measuring device and compares the measured differential pressure value with a reference differential pressure value under constant conditions And a control device for operating the dust removal processing device below, which control device is connected to a flow meter for measuring the flow rate of the processing gas and has means for calculating a reference differential pressure value corresponding to the measured value. A second aspect of the invention is characterized in that it has.
【０００６】[0006]
【実施例】次に、本発明を焼却炉に排ガス吸収用のバグ
フィルターを連結した排ガス処理装置を実施例として詳
細に説明する。１は焼却炉であって、該焼却炉１にはバ
グフィルター２が連結され、該バグフィルター２の濾布
３の差圧は該バグフィルター２の入口部と出口部とに設
けられた圧力計4a、4bの測定値に基づき差圧測定器５に
より測定が行われるようになっている。そして、この測
定差圧値は制御装置６において基準差圧値と比較される
ことによって前記測定差圧値が基準差圧値を超えた場合
にソレノイドバルブ７を作動させ、パルスジェット器８
などにより濾布３の払落し処理が行われるよう構成され
ている。なお、この払落し処理を行うのは前記のパルス
ジェット方式によるものの他、シェーキング方式、逆圧
方式、リバースジェット方式などいずれのものを用いる
ことができることは勿論である。EXAMPLES Next, the present invention will be described in detail as an example of an exhaust gas treating apparatus in which a bag filter for absorbing exhaust gas is connected to an incinerator. Reference numeral 1 denotes an incinerator, a bag filter 2 is connected to the incinerator 1, and a differential pressure of a filter cloth 3 of the bag filter 2 is a pressure gauge provided at an inlet portion and an outlet portion of the bag filter 2. The differential pressure measuring device 5 performs measurement based on the measured values of 4a and 4b. Then, the measured differential pressure value is compared with the reference differential pressure value in the control device 6 so that when the measured differential pressure value exceeds the reference differential pressure value, the solenoid valve 7 is operated and the pulse jet device 8 is operated.
The filter cloth 3 is configured to be removed by such means. In addition to the above-described pulse jet method, it is needless to say that any of a shaking method, a back pressure method, a reverse jet method, and the like can be used to perform the removal processing.
【０００７】本発明においては、前述したような差圧検
知式のダスト払落し方式において、特に前記基準差圧値
を処理ガスの流量に対応して計算するようにした点に特
徴を有するものである。前記処理ガスの流量としては、
例えば焼却炉１に供給される燃焼用エア量を流量計9aで
連続的に測定し、あるいは濾過処理を終了して放出され
る排ガス量を流量計9bで連続的に測定することにより検
出され、該処理ガスの流量をもとにして前記制御装置６
において基準差圧値を連続的に対応させて計算すること
により基準差圧値が決定される。The present invention is characterized in that the above-mentioned differential pressure detection type dust removal system is particularly adapted to calculate the reference differential pressure value corresponding to the flow rate of the processing gas. is there. As the flow rate of the processing gas,
For example, it is detected by continuously measuring the amount of combustion air supplied to the incinerator 1 with the flow meter 9a, or continuously measuring the amount of exhaust gas discharged after the filtration process with the flow meter 9b, The controller 6 based on the flow rate of the processing gas
In, the standard differential pressure value is determined by continuously calculating the standard differential pressure value.
【０００８】即ち、この基準差圧値（Ｐ）は、処理ガス
の流量（Ｑ）の関数として次式の関数式により連続的に
求められる。 Ｐ＝f(Ｑ) ・Ｐ0 〔Ｐ0 は処理ガスの流量が100 ％の場合における差圧設
定値である〕 例えば、処理ガスの流量（Ｑ）が100 ％の場合における
差圧設定値を120 mmAqした場合には、図２に示されるよ
うに処理ガスの流量に変化のない場合においては基準差
圧値を120 mmAqとして測定差圧値がこれを超えた場合に
払落し処理を行ない、次いで処理ガスの流量（Ｑ）が50
％に変化した場合には前式によって基準差圧値（Ｐ）が
即座に計算されて基準差圧値が80mmAqに置き換えられ、
この条件下においてダストの払落し処理が行われること
となる。また、更にその後処理ガスの流量（Ｑ）が75％
に変化した場合には同様に計算を行い基準差圧値を100
mmAqに置き換えてダストの払落し処理が行われることと
なる。That is, the reference differential pressure value (P) is continuously obtained by the following functional expression as a function of the flow rate (Q) of the processing gas. P = f (Q) · P 0 [P 0 is the differential pressure setting value when the processing gas flow rate is 100%] For example, the differential pressure setting value when the processing gas flow rate (Q) is 100% is In the case of 120 mmAq, as shown in FIG. 2, when the flow rate of the processing gas does not change, the reference differential pressure value is set to 120 mmAq, and when the measured differential pressure value exceeds this value, the treatment is performed, Next, the processing gas flow rate (Q) is 50
When it changes to%, the reference differential pressure value (P) is immediately calculated by the above formula and the reference differential pressure value is replaced with 80 mmAq.
Under this condition, dust removal processing will be performed. In addition, the flow rate (Q) of the processing gas after that is 75%.
When it changes to, the same calculation is performed and the reference differential pressure value is set to 100.
It will be replaced with mmAq and dust removal processing will be performed.
【０００９】このように、本発明においては従来の差圧
検知式のダスト払落し方式と異なり基準差圧値を処理ガ
スの流量に連続的に対応させて計算しつつ決定するよう
にしたので、前記処理ガスの流量に変動があっても払落
し頻度が安定し、集塵効率の低下や吸収効率の低下を発
生させることなく的確に追随して効率的なダストの払落
し処理を行なえることとなる。なお、前記の処理ガスの
流量が100 ％の場合における差圧設定値（Ｐ0 ）は、各
バグフィルターの集塵能力に基づいて任意に設定するこ
とができるものであることは勿論である。As described above, according to the present invention, unlike the conventional dust removal method of the differential pressure detection type, the reference differential pressure value is determined while being continuously calculated corresponding to the flow rate of the processing gas. Even if there is a change in the flow rate of the processing gas, the removal frequency is stable, and it is possible to perform accurate dust removal processing by accurately following without causing a decrease in dust collection efficiency or a decrease in absorption efficiency. Becomes It is needless to say that the differential pressure setting value (P 0 ) when the flow rate of the processing gas is 100% can be arbitrarily set based on the dust collecting ability of each bag filter.
【００１０】[0010]
【発明の効果】以上の説明からも明らかなように本発明
は、バグフィルターの負荷に対応して濾布に堆積したダ
ストを的確に払落すことができるとともに、処理すべき
ガス量の変動があっても集塵効率の低下や吸収効率の低
下を発生させることなく効率的にダストを払落すことが
できるものであり、また、そのようなダストの払落し処
理を効率的に行える装置を提供するものである。よっ
て、本発明は従来の問題点を一掃したバグフィルターに
おけるダストの払落し方法およびその装置として産業の
発展に寄与するところは極めて大である。As is apparent from the above description, the present invention can precisely remove dust accumulated on the filter cloth according to the load of the bag filter, and the fluctuation of the amount of gas to be processed can be reduced. Even if there is, it is possible to effectively remove dust without causing a decrease in dust collection efficiency or absorptive efficiency, and to provide a device that can efficiently perform such dust removal processing. To do. Therefore, the present invention is extremely large in that it contributes to the industrial development as a dust removing method and apparatus for a bag filter that eliminates the conventional problems.
【図１】本発明の実施例を示す全体概略図である。FIG. 1 is an overall schematic diagram showing an embodiment of the present invention.
【図２】本発明の実施例におけるバグフィルターの稼動
時間と基準差圧値との関係を示すグラフである。FIG. 2 is a graph showing the relationship between the operating time of the bag filter and the reference differential pressure value in the example of the present invention.
２ バグフィルター ３ 濾布 ５ 差圧測定器 ６ 制御装置 9a 流量計 9b 流量計 2 Bag filter 3 Filter cloth 5 Differential pressure measuring device 6 Control device 9a Flow meter 9b Flow meter
Claims (2)
定してこの測定差圧値を処理ガスの流量に対応して計算
された基準差圧値と比較し、前記測定差圧値が基準差圧
値を超えた場合にダストの払落し処理を行うようにした
ことを特徴とするバグフィルターにおけるダストの払落
し方法。1. A differential pressure of a filter cloth in a bag filter is measured, and the measured differential pressure value is compared with a reference differential pressure value calculated corresponding to a flow rate of a processing gas. A method for removing dust in a bag filter, characterized in that dust is removed when the pressure value is exceeded.
検出する差圧測定器(5) と該差圧測定器(5) に連結され
て前記測定差圧値を基準差圧値と比較し一定条件下でダ
ストの払落し処理装置を作動させる制御装置(6) とから
なり、該制御装置(6) は処理ガスの流量を測定する流量
計(9a)、(9b)が連結されてその測定値に対応して基準差
圧値を計算する手段を有していることを特徴とするバグ
フィルターにおけるダストの払落し装置。2. A differential pressure measuring device (5) for measuring the differential pressure of the filter cloth (3) to detect the measured differential pressure value, and the differential pressure measuring device (5) connected to the differential pressure measuring device (5) for measuring the measured differential pressure value. Comprising a control device (6) for operating the dust removal processing device under a certain condition compared with the reference differential pressure value, the control device (6) is a flow meter (9a) for measuring the flow rate of the processing gas, ( 9b) is connected and has a means for calculating a reference differential pressure value corresponding to the measured value, and a dust removing device in a bag filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31193191A JPH05115727A (en) | 1991-10-30 | 1991-10-30 | Method and apparatus for shaking off dust in bag filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31193191A JPH05115727A (en) | 1991-10-30 | 1991-10-30 | Method and apparatus for shaking off dust in bag filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05115727A true JPH05115727A (en) | 1993-05-14 |
Family
ID=18023156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31193191A Pending JPH05115727A (en) | 1991-10-30 | 1991-10-30 | Method and apparatus for shaking off dust in bag filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05115727A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07100321A (en) * | 1993-08-06 | 1995-04-18 | Mizutani Kazuo | Cleaning control method for bag type dust collector |
| US5711785A (en) * | 1995-10-26 | 1998-01-27 | Ormet Corporation | Method and apparatus for controlling the cleaning cycle of air filter elements and for predicting the useful life thereof |
| US6136068A (en) * | 1996-07-15 | 2000-10-24 | Amsted Industries Incorporated | Arc furnace fume collection method |
-
1991
- 1991-10-30 JP JP31193191A patent/JPH05115727A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07100321A (en) * | 1993-08-06 | 1995-04-18 | Mizutani Kazuo | Cleaning control method for bag type dust collector |
| US5711785A (en) * | 1995-10-26 | 1998-01-27 | Ormet Corporation | Method and apparatus for controlling the cleaning cycle of air filter elements and for predicting the useful life thereof |
| US6136068A (en) * | 1996-07-15 | 2000-10-24 | Amsted Industries Incorporated | Arc furnace fume collection method |
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