JP3460991B2 - Pulse cleaning method for multi-chamber bag filter - Google Patents
Pulse cleaning method for multi-chamber bag filterInfo
- Publication number
- JP3460991B2 JP3460991B2 JP2001190761A JP2001190761A JP3460991B2 JP 3460991 B2 JP3460991 B2 JP 3460991B2 JP 2001190761 A JP2001190761 A JP 2001190761A JP 2001190761 A JP2001190761 A JP 2001190761A JP 3460991 B2 JP3460991 B2 JP 3460991B2
- Authority
- JP
- Japan
- Prior art keywords
- bag filter
- differential pressure
- chamber
- filter
- bag
- 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 - Fee Related
Links
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、多室のバグフィル
ターにおいて、パルス洗浄によりろ布に付着したダスト
を払い落とす方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing dust adhering to a filter cloth by pulse cleaning in a multi-chamber bag filter.
【０００２】[0002]
【従来の技術】従来、多室のバグフィルターにおけるろ
布のパルス洗浄は、コストダウンを図るために、バグフ
ィルターを備えた設備に排ガスを導入する入口側の排ガ
スダクトと清浄ガスを排出する出口側の排ガスダクトと
の差圧を検知して、その差圧が設定値に達したときにパ
ルス空気をろ布に噴射させるという差圧制御で行ってい
た。例えば、図１０に示すように、１０室のバグフィル
ター１０を備えた集塵装置においては、排ガス入口ダク
ト１２及び排ガス出口ダクト１４での圧力を圧力計１
６、１８により測定するとともに、差圧発信器３０、差
圧検知装置２０及び制御装置２２により排ガス入口ダク
ト１２と排ガス出口ダクト１４との差圧を検知して圧縮
空気２４に接続された電磁弁２６を制御している。５０
は空気圧縮機、５１は空気ヘッダである。バグ出入口の
排ガスダクトでの差圧が設定値以上になったら、電磁弁
２６を開くことによりダイヤフラム弁４８を開かせ、各
バグフィルター１０のブロー管２８からろ布（図示略）
にパルスを打たせ、ろ布に付着したダストを払い落と
す。2. Description of the Related Art Conventionally, in order to reduce costs, pulse cleaning of filter cloth in a multi-chamber bag filter has an exhaust gas duct on the inlet side for introducing exhaust gas to a facility equipped with a bag filter and an outlet for discharging clean gas. The pressure difference between the exhaust gas duct on the side is detected, and when the pressure difference reaches a set value, pulsed air is jetted to the filter cloth to perform pressure difference control. For example, as shown in FIG. 10, in the dust collector including the bag filter 10 having 10 chambers, the pressure at the exhaust gas inlet duct 12 and the exhaust gas outlet duct 14 is measured by the pressure gauge 1.
6 and 18, the differential pressure transmitter 30, the differential pressure detection device 20 and the control device 22 detect the differential pressure between the exhaust gas inlet duct 12 and the exhaust gas outlet duct 14 to connect to the compressed air 24. 26 are controlled. Fifty
Is an air compressor, and 51 is an air header. When the differential pressure in the exhaust gas duct at the bag inlet / outlet exceeds the set value, the solenoid valve 26 is opened to open the diaphragm valve 48, and the blow pipe 28 of each bag filter 10 is filtered (not shown).
Apply a pulse to to wipe off dust adhering to the filter cloth.
【０００３】また、特開平５−１６８８３３号公報に
は、複数のセルにバグフィルターが配設された乾式集塵
装置において、各セルのバグフィルターの入側と出側の
差圧から圧力損失を検出し、現在の圧力損失が目標値よ
りも大きくなっているセルが存在すれば、目標値に対す
る現在値の増分に応じてそのセルに対する空気パルスの
噴射ピッチを短くし、また、現在の圧力損失が目標値よ
りも小さければ、単位時間当たりの洗浄回数が多すぎる
ため、そのセルに対する空気パルスの噴射ピッチを長く
するパルス洗浄方法が開示されている。Further, in JP-A-5-168833, in a dry type dust collector in which a bag filter is arranged in a plurality of cells, the pressure loss is caused by the differential pressure between the inlet side and the outlet side of the bag filter of each cell. If there is a cell that has been detected and the current pressure loss is larger than the target value, the injection pitch of the air pulse to that cell is shortened according to the increment of the current value with respect to the target value, and the current pressure loss is also increased. If is smaller than the target value, the number of cleanings per unit time is too large. Therefore, a pulse cleaning method is disclosed in which the injection pitch of air pulses to the cell is lengthened.
【０００４】[0004]
【発明が解決しようとする課題】上記のように、従来は
多室のバグフィルターのパルス洗浄を実施する場合、バ
グ出入口の排ガスダクトでの差圧を検知してパルスを打
たせる差圧制御を行ってきた。しかし、例えば、１０室
あるバグフィルターで排ガスダクト出入口の差圧の設定
値を１５０mmH2Oにして運転した場合、パルス洗浄をし
ても差圧が１５０mmH2Oを超えたままで、常にパルス洗
浄をしていることがあった。As described above, in the prior art, when performing pulse cleaning of a multi-chamber bag filter, the differential pressure control for detecting the differential pressure in the exhaust gas duct at the bag entrance and exit and issuing a pulse is performed. I went. However, for example, when a bag filter with 10 chambers is operated with the set value of the differential pressure at the exhaust gas duct inlet / outlet set to 150 mmH 2 O, the differential pressure still exceeds 150 mmH 2 O even if pulse cleaning is performed, and pulse cleaning is always performed. There was something I was doing.
【０００５】そこで、１枚のトレンドに排ガス流量、多
室バグフィルターの出入口ダクトでの差圧、バグフィル
ター本体各室の差圧をインプットし、排ガス流量の変動
によるバグ出入口ダクトでの差圧及びバグ各室の差圧の
変化を調査した。その結果、多室バグフィルターの出入
口ダクト差圧では、ろ布での差圧以外に、各バグフィル
ターの出入口ダンパや排ガスダクト等の圧力損失による
差圧が大きくなり、設定値を１５０mmH2Oとすることに
は無理があることが判明した。そこで、設定値を１８０
mmH2O、２００mmH2O、２２０mmH2Oと変えて、同様に排
ガス流量の変動によるバグ出入口ダクトでの差圧及びバ
グ各室の差圧の変化を調査した。Therefore, the exhaust gas flow rate, the differential pressure in the inlet / outlet duct of the multi-chamber bag filter, and the differential pressure in each chamber of the bag filter main body are input to one trend, and the differential pressure in the bag inlet / outlet duct due to the fluctuation of the exhaust gas flow rate and We investigated changes in differential pressure in each room. As a result, in the inlet / outlet duct differential pressure of the multi-chamber bag filter, in addition to the differential pressure at the filter cloth, the differential pressure due to the pressure loss of the inlet / outlet damper and exhaust gas duct of each bag filter becomes large, and the set value is 150 mmH 2 O. It turned out to be impossible to do. Therefore, the set value is 180
mmH 2 O, 200mmH 2 O, by changing the 220mmH 2 O, was investigated changes in the differential pressure of the differential pressure and bug chambers Bug entrance duct due to variations in the exhaust gas flow rate as well.
【０００６】設定値が１８０mmH2O、２００mmH2Oでは、
ろ布での差圧を除いたその他の圧力損失による差圧が依
然として大きく、パルス洗浄を連続で行うことがあっ
た。設定値を２２０mmH2Oにすると、パルス洗浄を連続
で行うことは無くなったが、長時間差圧が設定値に達し
なくなりパルス洗浄を行わない時が出てきた。これは、
パルス洗浄をバグ出入口ダクトでの差圧で制御している
ため、排ガスの流量変動によるバグ出入口ダンパや排ガ
スダクトの圧力損失の影響をもろに受け、ろ布に堆積し
たダストによる差圧を検知しにくいからである。そのた
め、排ガス流量が多いときにはろ布へのダストの堆積量
に関係なくバグ出入口ダクトでの差圧が常に設定値を超
え、パルス洗浄を連続で行うことになる。パルス洗浄の
回数が無駄に増えると、それだけろ布の寿命が短くなり
コストアップにつながる。When the set values are 180 mmH 2 O and 200 mmH 2 O,
The pressure difference due to other pressure loss excluding the pressure difference with the filter cloth was still large, and pulse cleaning was sometimes performed continuously. When the set value was set to 220 mmH 2 O, pulse cleaning was no longer performed continuously, but there were times when the differential pressure did not reach the set value for a long time and pulse cleaning was not performed. this is,
Since the pulse cleaning is controlled by the differential pressure at the bag inlet / outlet duct, it is affected by the pressure loss of the bag inlet / outlet damper and exhaust gas duct due to the fluctuation of the exhaust gas flow rate, and the differential pressure due to the dust accumulated on the filter cloth is detected. Because it is difficult. Therefore, when the flow rate of exhaust gas is high, the differential pressure in the bag inlet / outlet duct always exceeds the set value regardless of the amount of dust accumulated on the filter cloth, and pulse cleaning is continuously performed. If the number of pulse cleanings is unnecessarily increased, the service life of the filter cloth is shortened and the cost is increased.
【０００７】また、上記の特開平５−１６８８３３号公
報に記載されたパルス洗浄方法は、上流側のバグフィル
ターよりも下流側のバグフィルターの方がセルに取り込
まれたガス中の塵の粒度が細かいことが多いため、ダス
トの付着量が多いという前提で、各セルのバグフィルタ
ーの差圧制御により、下流側のバグフィルターでパルス
洗浄の回数が多く、上流側のバグフィルターでパルス洗
浄の回数が少なくなるようにして、バグフィルターによ
る除塵効率を一定に維持するものであり、バグフィルタ
ー各室の差圧変動が上流側、下流側に関わらずほぼ同一
であって上流側バグと下流側バグとでダストの付着量が
変わらない装置を対象とするものではない。また、上記
公報記載の方法は、各バグフィルター毎（又はグループ
毎）に空気パルスの噴射ピッチを個別に制御しており、
各バグフィルターでの差圧の平均値をとって一斉にパル
ス洗浄を行うものではなく、構成が複雑である。Further, in the pulse cleaning method described in the above-mentioned JP-A-5-168833, the particle size of dust in the gas taken into the cell is smaller in the downstream bag filter than in the upstream bag filter. Since it is often fine, assuming that a large amount of dust is attached, the differential pressure control of the bag filter of each cell causes a large number of pulse cleanings in the downstream bag filter and a large number of pulse cleanings in the upstream bag filter. To maintain a constant dust removal efficiency by the bag filter, and the differential pressure fluctuations in each chamber of the bag filter are almost the same regardless of the upstream side and the downstream side. This does not apply to devices in which the amount of adhered dust does not change. Further, the method described in the above publication controls the injection pitch of the air pulse individually for each bag filter (or for each group),
The structure is complicated because it does not perform pulse cleaning all at once by taking the average value of the differential pressure in each bag filter.
【０００８】本発明は上記の諸点に鑑みなされたもの
で、本発明の目的は、多室のバグフィルターにおいて、
差圧変動がほぼ同一である各室での差圧を測定すること
で、各バグフィルターのろ布に堆積したダスト量を正確
に検知し、各室での差圧の平均値を算出して設定値との
対比で全室のバグフィルターのパルス洗浄を同時に行う
ことにより、パルス洗浄の回数を少なくし、ろ布の寿命
を延ばすことができるパルス洗浄方法を提供することに
ある。The present invention has been made in view of the above points, and an object of the present invention is to provide a multi-chamber bag filter,
By measuring the differential pressure in each chamber where the differential pressure fluctuations are almost the same, the amount of dust accumulated on the filter cloth of each bag filter is accurately detected, and the average value of the differential pressure in each chamber is calculated. It is an object of the present invention to provide a pulse cleaning method capable of reducing the number of times of pulse cleaning and prolonging the life of a filter cloth by simultaneously performing pulse cleaning of bag filters in all rooms in comparison with a set value.
【０００９】[0009]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明の多室バグフィルターのパルス洗浄方法
は、複数室に区画された各室にバグフィルターを備えた
多室バグフィルターについて、各室バグフィルターのろ
布に所定時間毎に圧縮空気により逆圧を与えてろ布に付
着したダストを払い落とすパルス洗浄方法において、差
圧変動がほぼ同一である各室それぞれのバグフィルター
本体での出入口の差圧を測定することにより、ろ布での
圧力損失を検知してろ布に堆積したダスト量を推定し、
各室での差圧の平均値が設定値に達したときに全室のバ
グフィルターのパルス洗浄を同時に（一斉に）行ってダ
ストを払い落とすように構成されている。In order to achieve the above object, the pulse cleaning method for a multi-chamber bag filter according to the present invention is a multi-chamber bag filter having a bag filter in each of the plurality of chambers. , in the pulse cleaning method shake off dust adhering to the cloth filter cloth of each chamber bag filter Iro giving back pressure by compressed air at predetermined time intervals, the difference
By measuring the pressure difference between the inlet and outlet of the bag filter body in each chamber where the pressure fluctuations are almost the same, the pressure loss in the filter cloth is detected and the amount of dust accumulated on the filter cloth is estimated,
When the average value of the differential pressure in each room reaches the set value, the bag filters in all rooms are pulse-cleaned simultaneously ( at the same time) to remove the dust.
【００１０】多室のバグフィルターにおいて、各室バグ
フィルターの差圧変動をトレンドで追跡すると、後述の
図６や図７に示すように、各室の差圧変動はほぼ同じ動
きを示し、多室バグフィルター出入口ダクトでの差圧ほ
ど排ガス流量の変動による影響を受けていない。また、
後述の図８に示すように、排ガス流量がほぼ一定の場合
には、各室の差圧は徐々に上昇し、ろ布へのダスト堆積
が観察される。そこで、差圧制御の取出しを排ガスの流
量変動の影響を受けにくいバグ各室に変更し、バグ各室
の差圧の平均値を算出して差圧平均値が設定値よりも大
きくなったらパルス洗浄を行う構成とする。In a multi-chamber bag filter, when the differential pressure fluctuation of each room bag filter is tracked by a trend, the differential pressure fluctuation of each room shows almost the same movement as shown in FIG. 6 and FIG. It is not affected by fluctuations in exhaust gas flow rate as much as the differential pressure in the room bag filter inlet / outlet duct. Also,
As shown in FIG. 8 described later, when the exhaust gas flow rate is substantially constant, the differential pressure in each chamber gradually increases, and dust accumulation on the filter cloth is observed. Therefore, the extraction of differential pressure control is changed to each bag chamber that is not easily affected by fluctuations in the flow rate of exhaust gas, the average value of the differential pressure in each bag chamber is calculated, and a pulse is generated when the average differential pressure value exceeds the set value. It is configured to perform cleaning.
【００１１】また、差圧変動がほぼ同一である各室のう
ちの少なくとも一室のバグフィルター本体での出入口の
差圧を測定することにより、ろ布での圧力損失を検知し
てろ布に堆積したダスト量を推定し、いずれかのバグフ
ィルターでの差圧が設定値に達したときに全室のバグフ
ィルターのパルス洗浄を同時に（一斉に）行ってダスト
を払い落とす構成としても良い。Further, the chambers in which the fluctuations in the differential pressure are almost the same are different.
By measuring the differential pressure of the doorway in Chino least room in a bag filter body, estimates the amount of dust deposited on the fabric Iro detects the pressure loss in the filter cloth, the differential pressure in either a bag filter When the set value is reached, pulse cleaning of bag filters in all rooms may be performed simultaneously ( at the same time) to remove dust.
【００１２】[0012]
【発明の実施の形態】以下、本発明の実施の形態につい
て説明するが、本発明は下記の実施の形態に何ら限定さ
れるものではなく、適宜変更して実施することが可能な
ものである。図１は、本発明の実施の第１形態による多
室バグフィルターのパルス洗浄方法を実施する装置の全
体システムの概要を示している。例えば、１０室のバグ
フィルター１０を備えた集塵装置においては、従来のよ
うに排ガス入口ダクト１２と排ガス出口ダクト１４の差
圧を測定するのではなく、各バグフィルター１０の入口
側と出口側の差圧を差圧発信器３０及び差圧検知装置３
２によりそれぞれ測定・検知し、演算装置３４で各室の
差圧の平均値を算出して、制御装置２２にて差圧の平均
値と設定値を対比することで圧縮空気２４に接続された
ダイヤフラム弁４８を制御している。５０は空気圧縮
機、５１は空気ヘッダである。すなわち、各室の差圧の
平均値が設定値以上になったら、電磁弁２６を開くこと
により、ダイヤフラム弁４８を開かせ、各バグフィルタ
ー１０のブロー管２８からろ布（図示略）にパルスを打
たせ、ろ布に付着したダストを払い落とす。なお、各室
の差圧の平均値は、例えば、算術平均で求めることがで
きる。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described. However, the present invention is not limited to the following embodiments, and can be appropriately modified and implemented. . FIG. 1 shows an outline of an entire system of an apparatus for carrying out a pulse cleaning method for a multi-chamber bag filter according to a first embodiment of the present invention. For example, in a dust collector including the bag filter 10 having 10 chambers, the differential pressure between the exhaust gas inlet duct 12 and the exhaust gas outlet duct 14 is not measured as in the conventional case, but the inlet side and the outlet side of each bag filter 10 are measured. The differential pressure of the differential pressure transmitter 30 and the differential pressure detection device 3
2, the arithmetic unit 34 calculates the average value of the differential pressure of each chamber, and the control unit 22 compares the average value of the differential pressure with the set value to connect to the compressed air 24. The diaphragm valve 48 is controlled. Reference numeral 50 is an air compressor, and 51 is an air header. That is, when the average value of the differential pressure in each chamber becomes equal to or higher than the set value, the solenoid valve 26 is opened to open the diaphragm valve 48, and the blow pipe 28 of each bag filter 10 is pulsed to a filter cloth (not shown). To remove dust adhering to the filter cloth. In addition, the average value of the differential pressures of the respective chambers can be obtained by, for example, an arithmetic average.
【００１３】図２は多室バグフィルターの平面図を示し
ており、一例として、Ａ〜Ｊの１０室のバグフィルター
１０が図２のように配置されている。図６は、図２のよ
うに配置された多室バグフィルターの出入口ダクトでの
差圧［mmH2O］（）、排ガス流量［kNm3／h］（）、
バグフィルターＡ室差圧［mmH2O］（）、バグフィル
ターＧ室差圧［mmH2O］（）、バグフィルターＣ室差
圧［mmH2O］（）、バグフィルターＨ室差圧［mmH2O］
（）の経時変化を示している。また、図７は、図２の
ように配置された多室バグフィルターの出入口ダクトで
の差圧（）、排ガス流量（）、バグフィルターＡ室
差圧（）、バグフィルターＢ室差圧（）、バグフィ
ルターＣ室差圧（）の経時変化を示している。各室バ
グフィルター本体の差圧変動をトレンドで追跡すると、
図６や図７に示すように、各室の差圧変動はほぼ同じ動
きを示し、多室バグフィルター出入口ダクトでの差圧ほ
ど排ガス流量の変動による影響を受けていない。また、
図８に示すように、排ガス流量がほぼ一定の場合には、
各室の差圧は徐々に上昇し、ろ布へのダスト堆積が観察
される。なお、図８の〜は図６と同じである。FIG. 2 shows a plan view of a multi-chamber bag filter. As an example, the bag filters 10 of 10 chambers A to J are arranged as shown in FIG. FIG. 6 shows a differential pressure [mmH 2 O] (), an exhaust gas flow rate [kNm 3 / h] (), in an inlet / outlet duct of a multi-chamber bag filter arranged as shown in FIG.
Bag filter A chamber differential pressure [mmH 2 O] (), bag filter G chamber differential pressure [mmH 2 O] (), bag filter C chamber differential pressure [mmH 2 O] (), bag filter H chamber differential pressure [mmH 2 O]
() Shows the change over time. Further, FIG. 7 shows the differential pressure (), exhaust gas flow rate (), bag filter A chamber differential pressure (), bag filter B chamber differential pressure () at the inlet and outlet ducts of the multi-chamber bag filter arranged as shown in FIG. , Bag filter C chamber differential pressure () with time. Following the trend of the differential pressure fluctuation of each room bag filter body,
As shown in FIGS. 6 and 7, fluctuations in the differential pressure in each chamber show almost the same movement, and are not affected by fluctuations in the exhaust gas flow rate as much as the differential pressure in the multi-chamber bag filter inlet / outlet duct. Also,
As shown in FIG. 8, when the exhaust gas flow rate is almost constant,
The differential pressure in each chamber gradually increases, and dust accumulation on the filter cloth is observed. 8 to 8 are the same as those in FIG.
【００１４】そこで、図１に示す構成のように、差圧制
御の取出しを排ガスの流量変動の影響を受けにくいバグ
各室に変更し、バグ各室の差圧の平均値を算出して差圧
平均値が設定値よりも大きくなったらパルス洗浄を行う
ように制御する。例えば、差圧の設定値を１２０mmH2O
として、このときのパルス洗浄のトレンドを追跡する
と、図９に示すような結果が得られる。なお、図９の
〜は図７と同じである。以上の結果から、バグ各室の
差圧はバグ出入口ダクトでの差圧ほど排ガス流量の変動
の影響を受けていないこと、ろ布へのダストの堆積によ
る差圧の上昇、適正な回数のパルス洗浄による差圧の低
下（ダストの払い落し）の効果がよくわかる。なお、図
９に示すように、本例ではパルス洗浄が３０〜４０分に
１回と少なく、ろ布の寿命を長くするのに役立ってい
る。Therefore, as in the configuration shown in FIG. 1, the extraction of the differential pressure control is changed to each bag chamber which is not easily affected by the fluctuation of the exhaust gas flow rate, and the average value of the differential pressures in each bag chamber is calculated and the difference is calculated. Control is performed so that pulse cleaning is performed when the pressure average value becomes larger than the set value. For example, set the differential pressure to 120 mmH 2 O
As a result, by tracing the pulse cleaning trend at this time, the result as shown in FIG. 9 is obtained. 9 to 9 are the same as those in FIG. From the above results, the differential pressure in each bag chamber is not affected by the fluctuation of the exhaust gas flow rate as much as the differential pressure in the bag inlet / outlet duct, the differential pressure rises due to the accumulation of dust on the filter cloth, and the appropriate number of pulses is applied. The effect of lowering the differential pressure (dust removal) due to cleaning is clearly understood. In this example, as shown in FIG. 9, the pulse cleaning is small once every 30 to 40 minutes, which is useful for prolonging the life of the filter cloth.
【００１５】図３は、バグフィルタのパルス洗浄の概要
を示している。バグフィルタ１０には排ガス入口３６か
らダスト含有排ガスが導入され、円筒袋状のろ布３８の
外面から内部に排ガスが通過してダストはろ布３８の外
面に付着する。清浄なガスはろ布３８の内部を通って排
ガス出口４０から放出（又は次のバグフィルタに導入）
される。なお、５２は、排ガスの出入口に設けられたダ
ンパ装置である。パルス洗浄は、ガス負荷のある状態
で、ブロー管２８からの圧縮空気によりろ布３８に逆圧
を与えて、ろ布３８を瞬時に膨張させてダストの払い落
しを行うものである。払い落とされたダストは、ロータ
リバルブ５４により排出され、スクリュウコンベア５６
で外部に搬送される。一例として、図４にも示すよう
に、実際のバグフィルタでは、ろ布を上から見ると、管
板４２に正目状に配置されたフィルタ孔４４にろ布が取
り付けられており、図５に示すような固定されたブロー
管２８により１列毎にパルス洗浄が行われる。４６は空
気噴出管である。FIG. 3 shows an outline of pulse cleaning of the bag filter. The dust-containing exhaust gas is introduced into the bag filter 10 from the exhaust gas inlet 36, the exhaust gas passes through the inside from the outer surface of the cylindrical bag-shaped filter cloth 38, and the dust adheres to the outer surface of the filter cloth 38. The clean gas passes through the inside of the filter cloth 38 and is discharged from the exhaust gas outlet 40 (or introduced into the next bag filter).
To be done. Reference numeral 52 is a damper device provided at the inlet and outlet of the exhaust gas. In the pulse cleaning, a reverse pressure is applied to the filter cloth 38 by the compressed air from the blow pipe 28 under a gas load, and the filter cloth 38 is instantly expanded to remove the dust. The dust removed is discharged by the rotary valve 54 and the screw conveyor 56
Is transported to the outside. As an example, as shown in FIG. 4, in the actual bag filter, when the filter cloth is viewed from above, the filter cloth is attached to the filter holes 44 arranged in a regular shape on the tube sheet 42, and FIG. Pulse cleaning is performed for each row by the fixed blow tube 28 as shown in FIG. 46 is an air ejection pipe.
【００１６】[0016]
【発明の効果】本発明は上記のように構成されているの
で、つぎのような効果を奏する。
（１） 多室のバグフィルターにおいて、差圧変動がほ
ぼ同一である各室での差圧を測定することで、各バグフ
ィルターのろ布に堆積したダスト量を正確に検知し、各
室での差圧の平均値を算出して設定値との対比で全室の
バグフィルターのパルス洗浄を同時に行うことにより、
パルス洗浄の回数を少なくし、ろ布の寿命を延ばすこと
ができる。
（２） 従来、多室のバグフィルターのパルス洗浄は、
コストダウンのために、バグ出入口の排ガスダクトでの
差圧を検知してパルスを打たせる差圧制御を行ってきた
が、パルス洗浄回数が増えてしまい、それだけろ布の寿
命が短くなる。本発明では、各室での差圧を測定して制
御するので、設備のコストアップにはなるが、パルス洗
浄が適正な回数に減って高価なろ布が長持ちすることか
ら、トータルで見ればコストダウンになる。Since the present invention is configured as described above, it has the following effects. (1) In a multi-chamber bag filter, fluctuations in differential pressure are small
By measuring the differential pressure in each chamber, which is almost the same, the amount of dust accumulated on the filter cloth of each bag filter is accurately detected, and the average value of the differential pressure in each chamber is calculated to obtain the set value. By contrast, by simultaneously performing pulse cleaning of bag filters in all rooms,
The frequency of pulse cleaning can be reduced and the life of the filter cloth can be extended. (2) Conventionally, pulse cleaning of bag filters in multiple rooms is
In order to reduce the cost, the pressure difference control in which the pressure difference is detected in the exhaust gas duct at the bag entrance / exit and the pulse is applied has been performed, but the pulse cleaning frequency increases, and the life of the filter cloth decreases accordingly. In the present invention, since the differential pressure in each room is measured and controlled, the cost of the equipment is increased, but since the pulse cleaning is reduced to an appropriate number and the expensive filter cloth lasts a long time, the cost is reduced in total. Get down.
【図１】本発明の実施の第１形態による多室バグフィル
ターのパルス洗浄方法を実施する装置の全体システムを
示す概略構成説明図である。FIG. 1 is a schematic configuration explanatory view showing an entire system of an apparatus for carrying out a pulse cleaning method for a multi-chamber bag filter according to a first embodiment of the present invention.
【図２】本発明の実施の第１形態における多室バグフィ
ルターの配置例を示す平面図である。FIG. 2 is a plan view showing an arrangement example of a multi-chamber bag filter according to the first embodiment of the present invention.
【図３】バグフィルターのパルス洗浄の概要を示す概略
構成説明図である。FIG. 3 is a schematic configuration explanatory view showing an outline of pulse cleaning of a bag filter.
【図４】バグフィルターにおけるろ布の配列例を示す平
面図である。FIG. 4 is a plan view showing an arrangement example of filter cloths in a bag filter.
【図５】バグフィルターのパルス洗浄に用いるブロー管
を示す正面図である。FIG. 5 is a front view showing a blow tube used for pulse cleaning of a bag filter.
【図６】多室バグフィルターの出入口ダクトでの差圧、
排ガス流量、バグフィルター各室差圧の経時変化を示す
グラフである。[Fig. 6] Differential pressure in the inlet / outlet duct of the multi-chamber bag filter,
6 is a graph showing changes over time in the exhaust gas flow rate and the differential pressure of each bag filter chamber.
【図７】多室バグフィルターの出入口ダクトでの差圧、
排ガス流量、バグフィルター各室差圧の経時変化を示す
グラフである。FIG. 7: Differential pressure at the inlet / outlet duct of a multi-chamber bag filter,
6 is a graph showing changes over time in the exhaust gas flow rate and the differential pressure of each bag filter chamber.
【図８】排ガス流量がほぼ一定の場合の多室バグフィル
ターの出入口ダクトでの差圧、排ガス流量、バグフィル
ター各室差圧の経時変化を示すグラフである。FIG. 8 is a graph showing changes over time in the differential pressure at the inlet / outlet duct of the multi-chamber bag filter, the exhaust gas flow rate, and the differential pressure in each bag filter chamber when the exhaust gas flow rate is substantially constant.
【図９】本発明のパルス洗浄方法を実施した場合の多室
バグフィルターの出入口ダクトでの差圧、排ガス流量、
バグフィルター各室差圧の経時変化を示すグラフであ
る。FIG. 9 is a differential pressure in an inlet / outlet duct of a multi-chamber bag filter when the pulse cleaning method of the present invention is carried out, an exhaust gas flow rate,
It is a graph which shows the time-dependent change of the differential pressure of each chamber of the bag filter.
【図１０】従来の多室バグフィルターのパルス洗浄方法
を実施する装置の全体システムを示す概略構成説明図で
ある。FIG. 10 is a schematic structural explanatory view showing an entire system of an apparatus for carrying out a conventional pulse cleaning method for a multi-chamber bag filter.
１０ バグフィルター １２ 排ガス入口ダクト １４ 排ガス出口ダクト １６、１８ 圧力計 ２０、３２ 差圧検知装置 ２２ 制御装置 ２４ 圧縮空気 ２６ 電磁弁 ２８ ブロー管 ３０ 差圧発信器 ３４ 演算装置 ３６ 排ガス入口 ３８ ろ布 ４０ 排ガス出口 ４２ 管板 ４４ フィルタ孔 ４６ 空気噴出管 ４８ ダイヤフラム弁 ５０ 空気圧縮機 ５１ 空気ヘッダ ５２ ダンパ装置 ５４ ロータリバルブ ５６ スクリュウコンベア 10 Bug filter 12 Exhaust gas inlet duct 14 Exhaust gas outlet duct 16, 18 pressure gauge 20, 32 Differential pressure detector 22 Control device 24 compressed air 26 Solenoid valve 28 blow tube 30 differential pressure transmitter 34 arithmetic unit 36 Exhaust gas inlet 38 filter cloth 40 Exhaust gas outlet 42 tube sheet 44 Filter hole 46 Air ejection pipe 48 diaphragm valve 50 air compressor 51 air header 52 Damper device 54 Rotary valve 56 screw conveyor
Claims (2)
ーを備えた多室バグフィルターについて、各室バグフィ
ルターのろ布に圧縮空気により瞬時に逆圧を与えてろ布
に付着したダストを払い落とすパルス洗浄方法におい
て、差圧変動がほぼ同一である各室それぞれのバグフィ
ルター本体での出入口の差圧を測定することにより、ろ
布での圧力損失を検知してろ布に堆積したダスト量を推
定し、各室での差圧の平均値が設定値に達したときに全
室のバグフィルターのパルス洗浄を同時に行ってダスト
を払い落とすことを特徴とする多室バグフィルターのパ
ルス洗浄方法。1. A multi-chamber bag filter having a bag filter in each chamber divided into a plurality of chambers, the filter cloth of each room bag filter is instantly back-pressed by compressed air to remove dust adhering to the filter cloth. In the pulse cleaning method of dropping, the pressure loss at the filter cloth is detected and the amount of dust accumulated on the filter cloth is detected by measuring the pressure difference between the inlet and outlet of the bag filter body in each chamber where the differential pressure fluctuations are almost the same. A pulse cleaning method for a multi-chamber bag filter, which is characterized in that when the average value of the differential pressures in each room reaches a set value, pulse cleaning of the bag filters in all rooms is performed at the same time to remove dust.
ーを備えた多室バグフィルターについて、各室バグフィ
ルターのろ布に圧縮空気により瞬時に逆圧を与えてろ布
に付着したダストを払い落とすパルス洗浄方法におい
て、差圧変動がほぼ同一である各室のうちの少なくとも
一室のバグフィルター本体での出入口の差圧を測定する
ことにより、ろ布での圧力損失を検知してろ布に堆積し
たダスト量を推定し、いずれかのバグフィルターでの差
圧が設定値に達したときに全室のバグフィルターのパル
ス洗浄を同時に行ってダストを払い落とすことを特徴と
する多室バグフィルターのパルス洗浄方法。2. Regarding a multi-chamber bag filter having a bag filter in each chamber divided into a plurality of chambers, the filter cloth of each chamber bag filter is instantly back-pressed by compressed air to remove dust adhering to the filter cloth. In the dropping pulse cleaning method, the pressure loss at the filter cloth is detected by measuring the pressure difference between the inlet and outlet of the bag filter body of at least one of the chambers where the differential pressure fluctuations are almost the same. A multi-chamber bag filter characterized by estimating the amount of accumulated dust and performing pulse cleaning of the bag filters in all chambers at the same time when the differential pressure in any of the bag filters reaches a set value, to scavenge the dust. Pulse cleaning method.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001190761A JP3460991B2 (en) | 2001-06-25 | 2001-06-25 | Pulse cleaning method for multi-chamber bag filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001190761A JP3460991B2 (en) | 2001-06-25 | 2001-06-25 | Pulse cleaning method for multi-chamber bag filter |
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| JP2003001036A JP2003001036A (en) | 2003-01-07 |
| JP3460991B2 true JP3460991B2 (en) | 2003-10-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105983282A (en) * | 2015-12-31 | 2016-10-05 | 合肥水泥研究设计院 | Intelligent dust removal control system of dust collector |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009097656A1 (en) * | 2008-02-05 | 2009-08-13 | Ptronik Pty Limited | Dust collector control system |
| CN105688530B (en) * | 2014-11-28 | 2017-11-28 | 上海袋式除尘配件有限公司 | A kind of more Differential pressure control methods of sack cleaner |
| CN105688531B (en) * | 2014-11-28 | 2017-11-28 | 上海袋式除尘配件有限公司 | A kind of pressure difference sequential mixing control method of sack cleaner |
| CN111479623A (en) * | 2017-12-07 | 2020-07-31 | 新东工业株式会社 | Dust collecting device and method for detecting breakage of filter in dust collecting device |
| CN114534383B (en) * | 2022-03-25 | 2023-07-21 | 无锡红旗除尘设备有限公司 | Pulse blowing control method |
| CN116999974B (en) * | 2023-10-07 | 2024-01-05 | 佛山市天禄智能装备科技有限公司 | Method for realizing automatic cleaning of high-temperature rotary furnace dust collector by intelligent induction technology |
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2001
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105983282A (en) * | 2015-12-31 | 2016-10-05 | 合肥水泥研究设计院 | Intelligent dust removal control system of dust collector |
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| JP2003001036A (en) | 2003-01-07 |
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