JPH08103617A - Operation of pulse type bag filter - Google Patents
Operation of pulse type bag filterInfo
- Publication number
- JPH08103617A JPH08103617A JP23905394A JP23905394A JPH08103617A JP H08103617 A JPH08103617 A JP H08103617A JP 23905394 A JP23905394 A JP 23905394A JP 23905394 A JP23905394 A JP 23905394A JP H08103617 A JPH08103617 A JP H08103617A
- Authority
- JP
- Japan
- Prior art keywords
- auxiliary agent
- filter cloth
- collected dust
- dust
- precoat
- 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.)
- Granted
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、燃焼排ガス中のダスト
を集塵除去するパルス式バグフィルターによる排ガス処
理方法に関し、より詳しくは、濾布表面にプレコートを
形成し、濾布表面に堆積した捕集ダストをパルスエアの
吹き付けによって濾布から払い落す、プレコートパルス
式バグフィルターの稼働方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating exhaust gas by a pulse type bag filter for collecting and removing dust in combustion exhaust gas, and more specifically, a precoat is formed on the surface of the filter cloth and deposited on the surface of the filter cloth. The present invention relates to a method for operating a pre-coated pulse type bag filter, in which collected dust is blown off from a filter cloth by spraying pulsed air.
【０００２】[0002]
【従来の技術】一般に、パルス式バグフィルターはパル
スエアの吹き付けによって付着ダストを濾布から払い落
す形式のものであり、濾布の表面に予め濾過助剤をプレ
コートした状態で稼働される。この方式ではバグ室を複
数に区画し、その１室を脱塵直後に遮断して、濾布表面
全体に助剤をプレコートした後、通ガスをするために、
ダストのリークがなく、当初から高い除去効率が得られ
る。例えば、特公昭５２−２９４７０および特公昭５６
−２６４５６には、予め排ガス中に消石灰を送り込み濾
布にプレコートしてから媒塵を集塵することが開示さ
れ、特開平５−１２３５１５にはプレコート層厚の調整
と媒塵の払い落し時期の調整を行うことが記載され、実
開平５−５６２１１には複数のバグ室で順次プレコー
ト、集塵および払い落しを行うことが記載されている。2. Description of the Related Art Generally, a pulse bag filter is of a type in which adhering dust is blown off from a filter cloth by spraying pulse air, and it is operated in a state where a filter aid is pre-coated on the surface of the filter cloth. In this method, the bag chamber is divided into a plurality of chambers, one of the chambers is shut off immediately after dedusting, and after the auxiliary agent is pre-coated on the entire surface of the filter cloth, a gas is passed therethrough.
There is no dust leakage and high removal efficiency can be obtained from the beginning. For example, JP-B-52-29470 and JP-B-56
No. 26456 discloses that slaked lime is sent into exhaust gas in advance to pre-coat a filter cloth and then dust particles are collected. JP-A-5-123515 discloses adjustment of precoat layer thickness and removal timing of dust particles. It is described that the adjustment is performed, and in Japanese Utility Model Laid-Open No. 5-56211, it is described that the precoating, the dust collection, and the cleaning are sequentially performed in a plurality of bag chambers.
【０００３】[0003]
【発明が解決しようとする課題】しかし、従来のパルス
式バグフィルターでは、パルスエアの吹き付けによる捕
集ダストの払い落し直後に濾布表面にコート層がない状
態のまま排ガスを処理するために、パルスエア吹き付け
後の除去性能がはなはだ低下した。However, in the conventional pulse type bag filter, in order to process the exhaust gas without the coat layer on the surface of the filter cloth immediately after the collected dust is blown off by the blowing of the pulse air, the pulse air filter is used. The removal performance after spraying was significantly reduced.
【０００４】本発明の目的は、上記の点に鑑み、パルス
エアによる捕集ダスト払い落し後の除去性能の低下を避
けることができるパルス式バグフィルターの稼働方法を
提供することにある。In view of the above points, an object of the present invention is to provide a method of operating a pulse type bag filter which can avoid deterioration of the removal performance after the collected dust is blown off by pulse air.
【０００５】[0005]
【課題を解決するための手段】本発明によるパルス式バ
グフィルターの稼働方法は、反応剤を煙道中に吹き込ん
で燃焼排ガス中のダストをパルス式バグフィルターで集
塵処理するに当たり、濾布表面に堆積した捕集ダストを
パルスエアの吹き付けによって濾布から払い落した後、
濾布表面に助剤つぎに反応助剤でプレコートを形成し、
ついで排ガスを処理することを特徴とするものである。A method of operating a pulse type bag filter according to the present invention comprises a method of blowing a reactant into a flue and collecting dust in combustion exhaust gas with the pulse type bag filter to remove dust from the surface of a filter cloth. After the collected dust that has accumulated is blown off from the filter cloth by spraying pulsed air,
A precoat is formed on the filter cloth surface with an auxiliary agent and then a reaction auxiliary agent,
Then, the exhaust gas is treated.
【０００６】本発明の好ましい実施形態においては、バ
グフィルターを複数の独立したバグ室で構成し、各バグ
室で順次、排ガスの集塵処理、パルスエアの吹き付け、
およびプレコートの形成を行う。In a preferred embodiment of the present invention, the bag filter is composed of a plurality of independent bag chambers, and in each bag chamber, exhaust gas dust collection processing and pulse air blowing are sequentially performed.
And forming a precoat.
【０００７】助剤はシリカ・アルミナで、反応助剤が炭
酸ソーダであることが好ましい。It is preferable that the auxiliary agent is silica-alumina and the reaction auxiliary agent is sodium carbonate.
【０００８】助剤および反応助剤の添加量は、捕集ダス
ト中のＮａ2 Ｏ／［Ｎａ2 Ｏ＋（ＳｉＯ2 ＋Ａｌ
2 Ｏ3 ）］の比が０．３〜０．５になるように、決める
ことが好ましい。The amounts of the auxiliary agent and the reaction auxiliary agent added are Na 2 O / [Na 2 O + (SiO 2 + Al in the collected dust.
2 O 3 )] is preferably 0.3 to 0.5.
【０００９】[0009]
【作用】本発明の方法では、濾布表面上に堆積した捕集
ダストをパルスエアの吹き付けによって濾布から払い落
した後、濾布表面に助剤つぎに反応助剤でプレコートを
形成し、ついで排ガスを処理するので、パルスエアの吹
き付け後の除去性能の低下を避けることができる。In the method of the present invention, the collected dust accumulated on the surface of the filter cloth is blown off from the filter cloth by spraying pulsed air, and then a precoat is formed on the surface of the filter cloth with an auxiliary agent and then a reaction auxiliary agent. Since the exhaust gas is treated, it is possible to avoid deterioration of the removal performance after the pulsed air is blown.
【００１０】また、プレコート式のバグフィルターに、
反応助剤として炭酸ソーダ（Ｎａ2ＣＯ3 ）をプレコー
トすることによって、反応剤（Ｃａ（ＯＨ）2 ）の使用
量を低減することが可能となる。In addition, in the precoat type bag filter,
Pre-coating with sodium carbonate (Na 2 CO 3 ) as a reaction aid makes it possible to reduce the amount of the reactant (Ca (OH) 2 ) used.
【００１１】また、反応助剤をプレコートする前に助剤
（シリカ・アルミナ系）をプレコートするので、これが
濾布を保護する。したがって、従来は高い潮解性のため
に反応助剤として使用しにくかった炭酸ソーダを用いる
ことができる。Since the auxiliary agent (silica / alumina type) is pre-coated before the reaction auxiliary agent is pre-coated, this protects the filter cloth. Therefore, it is possible to use sodium carbonate which has hitherto been difficult to use as a reaction aid due to its high deliquescent property.
【００１２】さらに、助剤と反応助剤を適度な割合で使
用することによって捕集灰の融点を下げることができ
る。すなわち、従来の捕集ダストの融点は通常１６００
℃以上であったが、助剤および反応助剤の添加量を調整
することによって融点を１１００℃前後に低下すること
ができる。これによって捕集ダストの溶融処理を比較的
安値なバーナ溶融や電気溶融で行うことができる。Further, the melting point of the collected ash can be lowered by using the auxiliary agent and the reaction auxiliary agent in an appropriate ratio. That is, the melting point of conventional collected dust is usually 1600.
Although the temperature was higher than 0 ° C, the melting point can be lowered to around 1100 ° C by adjusting the addition amounts of the auxiliary agent and the reaction auxiliary agent. As a result, the melting process of the collected dust can be performed by burner melting or electric melting which is relatively inexpensive.
【００１３】また、助剤と反応助剤をバグ内に供給する
ことにより、バグフィルター内で助剤と反応助剤がよく
混合される。よって、捕集ダスト溶融処理時の捕集ダス
トとガラス形成物の混合操作の手間が省ける。By supplying the auxiliary agent and the reaction auxiliary agent into the bag, the auxiliary agent and the reaction auxiliary agent are well mixed in the bag filter. Therefore, the trouble of mixing the collected dust and the glass forming material during the collected dust melting process can be saved.
【００１４】[0014]
【実施例】図１は本発明によるパルス式バグフィルター
の稼働方法を示すフロー図である。バグフィルターは６
個の独立したバグ室(1) (2) (3) (4) (5) (6) で構成さ
れている。1 is a flow chart showing an operating method of a pulse type bag filter according to the present invention. Bug filter is 6
It consists of independent bug rooms (1) (2) (3) (4) (5) (6).
【００１５】まず、バグ室(1) に排ガスと反応剤が供給
され、排ガスが集塵処理される。ついで、バグ室(1) に
ブロワ(11)からヒータ(12)を経てパルスエアを供給し、
これによって捕集ダストの払い落しを行う。この時、バ
グ室(2) 〜(4) には反応剤タンク(7) から反応剤が供給
されて、通常の排ガス処理が行われ、またバグ室(5)〜
(6) では後述するプレコートの形成が行われている。First, the exhaust gas and the reactant are supplied to the bag chamber (1) to collect the exhaust gas. Next, pulse air was supplied to the bag room (1) from the blower (11) through the heater (12),
By this, the collected dust is removed. At this time, the reactive agent is supplied from the reactive agent tank (7) to the bag chambers (2) to (4) for normal exhaust gas treatment, and the bag chambers (5) to (4)
In (6), formation of a precoat described later is performed.
【００１６】バグ室(1) ではパルスエアによる捕集ダス
ト払い落しの直後に入口ダンパー(8) が閉じられ、最初
に助剤タンク(9) から所定量の助剤（シリカ・アルミナ
系、例えばカオリン）が供給され、濾布表面にプレコー
トされる。つぎに、反応助剤タンク(10)から反応助剤
（Ｎａ2 ＣＯ3 ）が所定量供給され、濾布表面にプレコ
ートされる。プレコートが終ると入口ダンパー(8) が開
き、再び排ガスと反応剤が供給され、排ガス処理が行わ
れる。In the bag chamber (1), the inlet damper (8) is closed immediately after the collected dust is blown off by the pulsed air, and a predetermined amount of the auxiliary agent (silica / alumina system such as kaolin) is first supplied from the auxiliary agent tank (9). ) Is supplied and precoated on the surface of the filter cloth. Next, a predetermined amount of reaction auxiliary agent (Na 2 CO 3 ) is supplied from the reaction auxiliary agent tank (10) and precoated on the surface of the filter cloth. When the precoating is completed, the inlet damper (8) is opened, the exhaust gas and the reactant are supplied again, and the exhaust gas is treated.
【００１７】バグ室(1) が排ガス処理に復帰した時点
で、つぎはバグ室(2) がパルスエアの吹き付け、ついで
プレコートの形成に付される。When the bag chamber (1) is returned to the exhaust gas treatment, the bag chamber (2) is then blown with pulsed air and then the precoat is formed.
【００１８】このようにして、６個の独立したバグ室
(1) (2) (3) (4) (5) (6) において、順次、排ガスの集
塵処理、パルスエアの吹き付け、およびプレコートの形
成が繰り返される。In this way, 6 independent bug rooms
In (1), (2), (3), (4), (5) and (6), the dust collection process of the exhaust gas, the spraying of pulsed air, and the formation of the precoat are sequentially repeated.
【００１９】パルスエアの吹き付けのタイミングは、バ
グ室全体の圧力損失の上昇をみて決定される。The timing of blowing the pulsed air is determined by observing the increase in pressure loss in the entire bag chamber.
【００２０】また、Ｎａ2 Ｏ／［Ｎａ2 Ｏ＋（ＳｉＯ2
＋Ａｌ2 Ｏ3 ）］の比が０．４付近でこの混合物の融点
は低くなる。Further, Na 2 O / [Na 2 O + (SiO 2
+ Al 2 O 3 )] ratio is around 0.4, the melting point of this mixture is low.
【００２１】図２は、表１に示す電気集塵飛灰（ＥＰ
灰）に、カオリン、炭酸ソーダおよび生石灰を、表２に
示す割合で配合して得られた調製物について、上記比と
溶流点の関係を調べた結果を示すものである。図２から
明らかなように、Ｎａ2 Ｏ／［Ｎａ2 Ｏ＋（ＳｉＯ2 ＋
Ａｌ2 Ｏ3 ）］の比が０．３〜０．５の範囲にあると
き、上記配合物の溶流点が１０００℃に以下になること
がわかった。FIG. 2 shows the electrostatic precipitating fly ash (EP
Fig. 3 shows the results of examining the relationship between the above ratio and the melt flow point for a preparation obtained by adding kaolin, sodium carbonate and quick lime to ash) in the proportions shown in Table 2. As is clear from FIG. 2, Na 2 O / [Na 2 O + (SiO 2 +
It has been found that when the ratio of Al 2 O 3 )] is in the range of 0.3 to 0.5, the melt point of the above formulation falls below 1000 ° C.
【００２２】ＥＰ灰の成分EP ash components
【表１】 用いたＥＰ灰、カオリン、炭酸ソーダおよび生石灰の配
合割合[Table 1] Mixing ratio of EP ash, kaolin, sodium carbonate and quicklime used
【表２】 Ｎａ2 ＣＯ3 は吸湿性の物質であり、その水分によるＨ
Ｃｌ、ＳＯ3 の捕捉を生じ、結果的には脱塩、脱硫の効
果を奏するため、反応剤（Ｃａ（ＯＨ）2 ）の投入量は
少なくてもよい。したがって、飛灰の溶流点の低下をも
たらす。[Table 2] Na 2 CO 3 is a hygroscopic substance and H due to its water content.
Since Cl and SO 3 are trapped and, as a result, the effects of desalination and desulfurization are exerted, the amount of the reactant (Ca (OH) 2) added may be small. Therefore, the melting point of fly ash is lowered.
【００２３】なお、図１中の(13)(14)(15)(16)(17)(18)
(19)(20)(21)(22)(23)(24)(25)(26)はダンパー、(27)は
誘引ファンである。Incidentally, (13) (14) (15) (16) (17) (18) in FIG.
(19) (20) (21) (22) (23) (24) (25) (26) are dampers, and (27) are attraction fans.
【００２４】[0024]
【発明の効果】本発明は以上の通り構成されているの
で、下記の効果を奏する。Since the present invention is constructed as described above, it has the following effects.
【００２５】本発明の方法では、濾布表面上に堆積した
捕集ダストをパルスエアの吹き付けによって濾布から払
い落した後、濾布表面に助剤つぎに反応助剤でプレコー
トを形成し、ついで排ガスを処理するので、パルスエア
による捕集ダスト払い落し後の除去性能の低下を避ける
ことができると共に、集塵除去した捕集ダストの溶融処
理による無害化においてその溶流点を低下させることが
でき、溶融処理費用の節減を達成することができる。In the method of the present invention, the collected dust accumulated on the surface of the filter cloth is blown off from the filter cloth by spraying pulsed air, and then a precoat is formed on the surface of the filter cloth with an auxiliary agent and then a reaction auxiliary agent. Since the exhaust gas is treated, it is possible to avoid the deterioration of the removal performance after the collected dust is blown off by pulsed air, and to lower the melting point of the collected dust that has been removed by detoxification by the melting process. It is possible to reduce the cost of melt processing.
【図１】プレコートパルス式バグフィルターフロー図で
ある。FIG. 1 is a flow chart of a precoat pulse type bag filter.
【図２】Ｎａ2 Ｏ／［Ｎａ2 Ｏ＋（ＳｉＯ2 ＋Ａｌ2 Ｏ
3 ）］の比と溶流点の関係を示すグラフである。FIG. 2 Na 2 O / [Na 2 O + (SiO 2 + Al 2 O
3 )] ratio and melt point.
(1) (2) (3) (4) (5) (6) ：バグ室 (7) ：反応剤タンク (8) ：入口ダンパー (9) ：助剤タンク (10)：反応助剤タンク (11)：ブロワ (12)：ヒータ (1) (2) (3) (4) (5) (6): Bug chamber (7): Reagent tank (8): Inlet damper (9): Auxiliary tank (10): Reaction auxiliary tank ( 11): Blower (12): Heater
Claims (4)
中のダストをパルス式バグフィルターで集塵処理するに
当たり、濾布表面に堆積した捕集ダストをパルスエアの
吹き付けによって濾布から払い落した後、濾布表面に助
剤つぎに反応助剤でプレコートを形成し、ついで排ガス
を処理することを特徴とするパルス式バグフィルターの
稼働方法。1. When the dust in a combustion exhaust gas is collected by a pulse bag filter by blowing a reactant into a flue, the collected dust accumulated on the surface of the filter cloth is blown off from the filter cloth by spraying pulse air. After that, a precoat is formed on the surface of the filter cloth with an auxiliary agent and then a reaction auxiliary agent, and then the exhaust gas is treated.
で構成し、各バグ室で順次、排ガスの集塵処理、パルス
エアの吹き付け、およびプレコートの形成を行う請求項
１項記載の方法。2. The method according to claim 1, wherein the bag filter is constituted by a plurality of independent bag chambers, and in each bag chamber, the exhaust gas dust collecting process, the pulse air blowing process, and the precoating process are sequentially performed.
炭酸ソーダである請求項１項または２項記載の方法。3. The method according to claim 1, wherein the auxiliary agent is silica-alumina and the reaction auxiliary agent is sodium carbonate.
スト中のＮａ2 Ｏ／［Ｎａ2 Ｏ＋（ＳｉＯ2 ＋Ａｌ2 Ｏ
3 ）］の比が０．３〜０．５になるように、決める請求
項１項〜３項記載のうちいずれか１記載の方法。4. The additive amount of the auxiliary agent and the reaction auxiliary agent is Na 2 O / [Na 2 O + (SiO 2 + Al 2 O in the collected dust.
The method according to any one of claims 1 to 3, wherein the ratio 3 )] is determined so as to be 0.3 to 0.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6239053A JP3010248B2 (en) | 1994-10-03 | 1994-10-03 | How to operate a pulsed bag filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6239053A JP3010248B2 (en) | 1994-10-03 | 1994-10-03 | How to operate a pulsed bag filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08103617A true JPH08103617A (en) | 1996-04-23 |
| JP3010248B2 JP3010248B2 (en) | 2000-02-21 |
Family
ID=17039177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6239053A Expired - Fee Related JP3010248B2 (en) | 1994-10-03 | 1994-10-03 | How to operate a pulsed bag filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3010248B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015091588A (en) * | 2005-03-24 | 2015-05-14 | デュール システムズ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Coating facility |
-
1994
- 1994-10-03 JP JP6239053A patent/JP3010248B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015091588A (en) * | 2005-03-24 | 2015-05-14 | デュール システムズ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Coating facility |
| US9643118B2 (en) | 2005-03-24 | 2017-05-09 | Durr Systems, Inc. | Device for removing wet paint overspray |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3010248B2 (en) | 2000-02-21 |
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