JP2564457B2 - Operation control method of multi-chamber type pre-coat type bag filter device - Google Patents
Operation control method of multi-chamber type pre-coat type bag filter deviceInfo
- Publication number
- JP2564457B2 JP2564457B2 JP4349331A JP34933192A JP2564457B2 JP 2564457 B2 JP2564457 B2 JP 2564457B2 JP 4349331 A JP4349331 A JP 4349331A JP 34933192 A JP34933192 A JP 34933192A JP 2564457 B2 JP2564457 B2 JP 2564457B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- bag filter
- dust
- filter device
- chamber
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
- B01D2273/12—Influencing the filter cake during filtration using filter aids
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Description
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【産業上の利用分野】本発明は、焼却炉や燃焼炉から発
生する排ガス中の酸性有害ガス等を中和して除去または
回収するバグフィルタ装置に関し、特に濾過作業を行う
前に濾布の表面にプレコート層を形成する多室形プレコ
ート式バグフィルタ装置の運転制御方法に関する。BACKGROUND OF THE INVENTION The present invention is applicable to incinerators and combustion furnaces.
TECHNICAL FIELD The present invention relates to a bag filter device for neutralizing and removing or recovering acidic harmful gas or the like in live exhaust gas, and particularly to a multi-chamber precoat for forming a precoat layer on the surface of a filter cloth before performing a filtering operation. TECHNICAL FIELD The present invention relates to an operation control method of a bag filter device.
【０００２】[0002]
【従来の技術】現在、実用に供されているバグフィルタ
装置の形式のうち堆積した粉じん層の払い落し方法で
は、パルスジェット式が最も多く採用される傾向があ
る。2. Description of the Related Art Among the types of bag filter devices currently in practical use, the pulse jet method tends to be most frequently used as a method for removing accumulated dust layers.
【０００３】パルスジェット式は、払い落し時間が極め
て短いために、送入される含じん気体をしゃ断すること
なく払い落しを行うのが一般的であり、脱じん区域をブ
ロック分けしただけの単一室で構成され、払い落しのた
めの運転休止室を余分に設けない事が多かった。In the pulse jet type, since the cleaning time is extremely short, it is common to perform the cleaning without interrupting the dust-containing gas to be fed, and the dust removal area is simply divided into blocks. It consisted of one room, and often did not have an extra outage room to remove it.
【０００４】然し、含じん気流をしゃ断しないために、
払い落しにより落下する粉じんが、隣接する濾過作業中
の他の濾布面に吸引・付着される確率が高くなるので、
最近では高効率を求める施設または大容量装置の場合に
は、多室構造を採用し払い落し作業中は単位集じん機構
に流入する含じん気流をしゃ断する傾向にある。However, in order not to block the dust-containing air flow,
Since the dust that falls off due to being brushed off is more likely to be sucked and adhered to the other filter cloth surface during the adjacent filtering work,
Recently, in the case of a facility or a large-capacity device that requires high efficiency, a multi-chamber structure has been adopted, and there is a tendency to block the dust-containing airflow flowing into the unit dust collection mechanism during the operation.
【０００５】また、他の払い落し方式では、その送風や
払い落し時間の関係上、当初から多室構造を採用してい
た。In addition, in other blow-off methods, a multi-chamber structure was adopted from the beginning because of its blowing and blow-off time.
【０００６】一方、ばいじんの濾過や酸性有害ガス中和
作業の主体となる薬剤の濾布への付着方法には、排ガス
中に薬剤を混入させて排ガスが通過する際に濾布に付着
させる排ガス同伴方式と濾過作業を行う前に薬剤を噴射
して濾布に付着させるプレコート方式とがあるが、前者
が一般的な方式である。[0006] On the other hand, the method of adhering the chemical agent to the filter cloth, which is the main component for the filtration of soot and dust and the neutralization of acidic harmful gases, is a method of mixing the chemical agent into the exhaust gas and adhering to the filter cloth when the exhaust gas passes through. There are a companion method and a pre-coat method in which a chemical is sprayed and adhered to the filter cloth before performing the filtration work, but the former is a general method.
【０００７】そこで、各方式のバグフィルタ装置のう
ち、焼却炉や燃焼炉に用いられるパルスジェット式多室
構造形排ガス同伴方式を従来の技術の代表として説明す
る。Therefore, among the bag filter devices of each method, the pulse jet type multi-chamber structure type exhaust gas entrainment method used in an incinerator or a combustion furnace will be described as a representative of the prior art.
【０００８】図４乃至図６は従来のバグフィルタ装置の
概略構成を示し、図７は従来技術と本願における各単位
集じん機構の運転状況の比較を示す。FIGS. 4 to 6 show a schematic structure of a conventional bag filter device, and FIG. 7 shows a comparison of the operating conditions of each unit dust collecting mechanism in the prior art and the present application.
【０００９】図４乃至図６において、ａはバグフィルタ
装置を構成する単位集じん機構を収納し、相互を区分す
るケーシングであり、それぞれの単位集じん機構は、複
数の濾布ｂを懸架する仕切板ｃによって、下部の濾過室
ｄと上部の清浄ガス通路ｅとに２分割されている。In FIGS. 4 to 6, reference numeral a is a casing which houses a unit dust collecting mechanism constituting the bag filter device and separates the unit from each other. Each unit dust collecting mechanism suspends a plurality of filter cloths b. The partition plate c divides the filter chamber d in the lower part and the clean gas passage e in the upper part into two parts.
【００１０】清浄ガス通路ｅには、図示しない空気圧縮
源に連接される開閉弁を通じて、各濾布ｂ内に圧縮空気
をジェットパルス状に噴射させるための複数のノズルｆ
１を備えた空気吹込管ｆが配設されている。In the clean gas passage e, a plurality of nozzles f for injecting compressed air in a jet pulse shape into each filter cloth b through an opening / closing valve connected to an air compression source (not shown).
1 is provided with an air blowing pipe f.
【００１１】濾過室ｄの下方は、粉じん収集用のホッパ
室ｈを構成し、その底部には粉じんを排出するための排
出機構ｊが連接されている。A hopper chamber h for collecting dust is formed below the filtration chamber d, and a discharge mechanism j for discharging dust is connected to the bottom of the hopper chamber h.
【００１２】ホッパ室ｈの外側面には、図示しない焼却
炉または燃焼炉等で発生したばいじんや酸性有害ガス等
を含む燃焼ガスを導入する主煙道ｋが配設され、主煙道
ｋの途中には、図示しない有害ガス除去装置から輸送さ
れる中和用の薬剤ｍが連続的に供給されており、薬剤ｍ
は燃焼ガスと混合して排ガスｇとなる。On the outer side surface of the hopper chamber h, a main flue k for introducing combustion gas containing soot and acidic harmful gas generated in an incinerator or a combustion furnace (not shown) is arranged. In the middle of the process, the chemical m for neutralization transported from a harmful gas removing device (not shown) is continuously supplied.
Is mixed with combustion gas to form exhaust gas g.
【００１３】排ガスｇは、主煙道ｋから各単位集じん機
構ごとに分岐された分岐導入ダクトｐを介して、各ホッ
パ室ｈに流入し、その間に含有する酸性有害ガスと薬剤
ｍとが中和反応を起こしながら濾過室ｄ内に懸架された
複数の濾布ｂの表面に到達する。Exhaust gas g flows into each hopper chamber h from a main flue k through a branch introduction duct p branched for each unit dust collection mechanism, and acidic harmful gas and chemicals m contained therein are separated. While reaching the neutralization reaction, it reaches the surfaces of the plurality of filter cloths b suspended in the filtration chamber d.
【００１４】後述の払い落し作業終了後の単位集じん機
構は、通気抵抗が低いために連続操業中の他区画よりも
大量の排ガスｇが流入し、濾布ｂを通過する際に、その
濾過能力により、反応済及び未反応の薬剤ｍが濾過され
て表面に付着し、濾過・中和作業の主体となる一部反応
済の薬剤層ｂ１（図５参照）が次第に形成される。The unit dust-collecting mechanism after the completion of the scrubbing work, which will be described later, has a low ventilation resistance, so that a larger amount of the exhaust gas g flows into the unit than the other sections in continuous operation, and when it passes through the filter cloth b, it is filtered. Depending on the ability, the reacted and unreacted drugs m are filtered and adhered to the surface, and the partially reacted drug layer b1 (see FIG. 5), which is the main component of the filtration / neutralization work, is gradually formed.
【００１５】そして、この後の通ガス中においては、排
ガスｇ中に残存する酸性有害ガスは薬剤層ｂ１内の未反
応薬剤ｍと中和反応を起こすとともに、排ガスｇと共に
飛来するばいじん及び反応済と未反応の薬剤ｍは薬剤層
ｂ１表面に順次堆積して粉じん層ｂ２（図５参照）を形
成する。Then, in the subsequent passing of the gas, the acidic harmful gas remaining in the exhaust gas g causes a neutralization reaction with the unreacted drug m in the drug layer b1, and at the same time, the soot and dust which has fly-in with the exhaust gas g and the reaction completion. And the unreacted drug m are sequentially deposited on the surface of the drug layer b1 to form a dust layer b2 (see FIG. 5).
【００１６】従って、排ガスｇが該粉じん層ｂ２及び薬
剤層ｂ１を通過する際に、保有するばいじんが捕捉され
るとともに、残存する酸性有害ガスが未反応の薬剤ｍと
接触することにより、効率良く中和反応して清浄ガスｎ
となり、清浄ガス通路ｅに排出される。Therefore, when the exhaust gas g passes through the dust layer b2 and the drug layer b1, the retained dust is captured, and the residual acidic harmful gas comes into contact with the unreacted drug m, thereby efficiently Neutralization reaction and clean gas n
And is discharged to the clean gas passage e.
【００１７】清浄ガスｎは、清浄ガス通路ｅの外側面に
配設された分岐排出ダクトｑに挿入された清浄ガス開閉
弁ｒを通り、排出主ダクトｓを経て、図示しない誘引通
風機に吸引されて、図示しない煙突から大気中に放出さ
れる。The clean gas n passes through a clean gas on-off valve r inserted into a branch discharge duct q arranged on the outer surface of the clean gas passage e, passes through a discharge main duct s, and is sucked into an unillustrated draft fan. Then, it is released into the atmosphere from a chimney (not shown).
【００１８】この状態で運転を継続すると、飛来し続け
る燃焼ガス中のばいじん及び反応済と未反応の薬剤ｍに
より、粉じん層ｂ２が次第に成長して通気抵抗が増加す
る。そこで、該当する単位集じん機構の清浄ガス開閉弁
ｒを閉鎖して排ガスｇの流入を停止せしめた後、空気吹
込管ｆから圧縮空気をジェット噴射させることにより、
濾布ｂの表面に付着した薬剤層ｂ１と堆積した粉じん層
ｂ２を剥離・落下させる。この後、清浄ガス開閉弁ｒを
再び開放することで排ガスｇの流入を再開させる。When the operation is continued in this state, the dust layer b2 gradually grows due to the soot and dust in the combustion gas that continues to fly and the reacted and unreacted chemicals m, and the ventilation resistance increases. Therefore, by closing the clean gas on-off valve r of the corresponding unit dust collecting mechanism to stop the inflow of the exhaust gas g, and then jetting the compressed air from the air blowing pipe f,
The drug layer b1 attached to the surface of the filter cloth b and the accumulated dust layer b2 are peeled off and dropped. After that, the clean gas on-off valve r is opened again to restart the inflow of the exhaust gas g.
【００１９】この払い落し操作を各単位集じん機構ごと
に順次行うことにより、単位集じん機構の各濾布に付着
・堆積したばいじん及び反応済と未反応の薬剤ｍ等から
なる捕集灰を除去することができる。なお、ホッパ室ｈ
に落下した捕集灰は、排出機構ｊにより、外部に排出す
るようになされている。By sequentially performing this wiping-off operation for each unit dust collecting mechanism, the dust collected on and deposited on each filter cloth of the unit dust collecting mechanism and the collected ash composed of the reacted and unreacted chemicals m and the like are collected. Can be removed. The hopper room h
The collected ash that has fallen to is discharged to the outside by a discharging mechanism j.
【００２０】[0020]
【発明が解決しようとする課題】従来の多室構造形排ガ
ス同伴方式バグフィルタ装置の場合は、薬剤層ｂ１を形
成する薬剤ｍは主煙道ｋまたは図示しない前置反応塔に
一括して供給されている。In the case of the conventional multi-chamber structure type exhaust gas entrainment type bag filter device, the drug m forming the drug layer b1 is supplied all at once to the main flue k or a pre-reaction tower (not shown). Has been done.
【００２１】そこで、図７に示す如く、通気抵抗が増加
した単位集じん機構の払い落しを行えば、その区画の通
気抵抗が一挙に低下するために、排ガスｇがその区画に
集中的に流入し、大量の薬剤ｍが同伴されるが、薬剤層
ｂ１の成長とともにその区画への排ガス流量が次第に低
下して薬剤供給量も自動的に低下する。さらに、排ガス
流量の低下とともに、濾布ｂへの薬剤ｍの付着率が低減
し、過半数の薬剤ｍは未反応のままホッパ室ｈに落下す
るようになる。Therefore, as shown in FIG. 7, if the unit dust collecting mechanism having the increased ventilation resistance is removed, the ventilation resistance of the section is reduced all at once, so that the exhaust gas g intensively flows into the section. Then, although a large amount of the drug m is entrained, the flow rate of exhaust gas to the section gradually decreases as the drug layer b1 grows, and the drug supply amount also automatically decreases. Furthermore, as the flow rate of exhaust gas decreases, the rate of attachment of the chemical m to the filter cloth b decreases, and a majority of the chemicals m fall into the hopper chamber h without reaction.
【００２２】この場合、払い落し直後の最も濾過・中和
能力の低い区画に排ガスｇが大量に流入するために、薬
剤層ｂ１及び粉じん層ｂ２が成長する迄は、ばいじん及
び未反応の酸性有害ガスが排出されることになり、他の
運転継続中の単位集じん機構を含めた装置全体のばいじ
ん捕捉率及び有害ガス除去率は一時的に低下する結果と
なる。In this case, since a large amount of the exhaust gas g flows into the section having the lowest filtration / neutralization capacity immediately after being blown off, soot and unreacted acidic harmful substances remain until the drug layer b1 and the dust layer b2 grow. As a result, gas will be exhausted, resulting in a temporary decrease in the dust collection rate and harmful gas removal rate of the entire system including the other unit dust collection mechanism during continuous operation.
【００２３】一方、薬剤ｍが連続的に供給されているた
めに、薬剤ｍは払い落し直後はその区画に集中的に流入
するものの残余は他の区画に、定常運転時には全部が各
区画に供給されるために、薬剤層ｂ１が形成された以後
の各区画に供給し続けられる未反応薬剤ｍは過剰分であ
り、粉じん層ｂ２の増大を助長することになる。On the other hand, since the medicine m is continuously supplied, the medicine m intensively flows into the section immediately after being wiped off.
However, since the rest is supplied to other compartments, and the rest is supplied to each compartment during steady operation, after the drug layer b1 is formed.
The unreacted drug m that is continuously supplied to each of the sections is an excess amount, and promotes the increase of the dust layer b2.
【００２４】従って、通気抵抗の上昇が早くなるために
払い落し間隔が短くなり、前述の落下薬剤の増加と相ま
って未反応薬剤を多量に排出する結果、薬剤費が嵩むだ
けでなく、重金属やダイオキシン類の有害物質を含むた
めに「特別管理廃棄物」に指定されている捕集灰（排出
灰）の量を増加させることになり、後処理費用の増大を
招くことになる。Therefore, since the ventilation resistance rises quickly, the interval for removing the particles is shortened, and a large amount of unreacted drug is discharged in combination with the increase in the above-mentioned dropped drug. As a result, not only the drug cost increases, but also heavy metals and dioxins are added. Since the amount of collected ash (exhaust ash) designated as “specially controlled waste” is increased due to the inclusion of toxic substances of the same class, the post-treatment cost will increase.
【００２５】即ち、バグフィルタ装置を構成する全ての
単位集じん機構に、薬剤を供給し続ける方式であるため
に、従来の多室構造は、払い落し時の剥離粉じんを他室
に拡散させないための区画に過ぎず、薬剤ｍの適量供給
及び濾過性能の安定には効力を発揮していなかった。That is, all of the constituents of the bag filter device are
Because it is a system that continues to supply the drug to the unit dust collection mechanism
In addition, the conventional multi-chamber structure is merely a section for preventing the release dusts from diffusing into other chambers when it is wiped off, and has not been effective in supplying an appropriate amount of the drug m and stabilizing the filtration performance.
【００２６】しかも、通気抵抗が増加すると、分岐排出
ダクトｑに挿入された清浄ガス開閉弁ｒを閉鎖すること
により、当該単位集じん機構への排ガスｇの流入を停止
せしめた後、払い落し作業を行う必要があるために、各
単位集じん機構ごとに、分岐排出ダクトｑ及び清浄ガス
開閉弁ｒを設置することとなり、装置が複雑になるだけ
でなく、保守点検も煩雑になるきらいがあった。この事
は、排ガスｇの流入をしゃ断するダンパ等をホッパ室ｈ
の入口に配設した場合も同様である。Moreover, when the ventilation resistance increases, the clean gas on-off valve r inserted in the branch exhaust duct q is closed to stop the flow of the exhaust gas g into the unit dust collecting mechanism, and then the scrubbing work is performed. Therefore, the branch exhaust duct q and the clean gas opening / closing valve r are installed for each unit dust collection mechanism, which not only complicates the device but also makes maintenance and inspection complicated. It was This means that a damper, etc., that blocks the inflow of exhaust gas g, should
The same applies to the case where it is arranged at the entrance of.
【００２７】また、払い落し作業時には、ガス流を停止
した運転休止室が必要となるために、単位集じん機構及
び清浄ガス通路ｅと払い落し装置並びに分岐排出ダクト
ｑと清浄ガス開閉弁ｒ等１式を追加設置することにな
り、設備費が嵩み、据付面積が広くなる。In addition, since the operation stop chamber in which the gas flow is stopped is required during the scrubbing work, the unit dust collecting mechanism and the clean gas passage e, the scrubbing device, the branch discharge duct q, the clean gas on-off valve r, etc. One set will be additionally installed, which increases the equipment cost and increases the installation area.
【００２８】[0028]
【課題を解決するための手段】本発明の多室形プレコー
ト式バグフィルタ装置の運転制御方法は、濾過室及びホ
ッパ室から成る複数の単位集じん機構と、これら単位集
じん機構に共通の清浄ガス通路とから構成された多室形
プレコート式バグフィルタ装置の運転制御方法であっ
て、前記バグフィルタ装置を構成する単位集じん機構ご
とに配設された薬剤供給装置により、払い落し作業を完
了した単位集じん機構のみに、必要にして十分な量の薬
剤を通ガス状態のままで所定時間供給することにより、
中和及び濾過作業を司るプレコート層を短時間で形成
し、次回払い落しまでは薬剤を供給することなく濾過作
業を行い、この後払い落し作業を通ガス状態のままで行
うものである。Operation control method of Oshitsukatachi Pureko <br/> preparative type bag filter apparatus of the present invention, in order to solve the problems] includes a plurality of unit precipitators mechanism consisting Filtration chamber and the hopper compartment, these units Collection
A method for controlling the operation of a multi-chamber type pre-coat type bag filter device configured by a clean gas passage common to the dust mechanism , wherein the operation control method is provided for each unit dust collecting mechanism constituting the bag filter device. By supplying a sufficient amount of necessary and sufficient amount of drug for a predetermined time in a gas state only to the unit dust collecting mechanism that has completed the removal work by the drug supply device ,
A precoat layer that controls the neutralization and filtration work is formed in a short time, and the next time it is blown off, the filtration work is performed without supplying chemicals.
Work is performed, and after that, the removal work is performed in a gas state.
Cormorant is intended.
【００２９】[0029]
【作用】通ガス中に払い落し作業を行うとともに払い落
し作業を終了した単位集じん機構のみに、必要にして十
分な量の薬剤を供給手段により供給して、中和・濾過作
用を司るプレコート層を短時間で形成することで、除去
率が低下することなく当初から高性能の酸性有害ガス除
去率及びばいじんや浮遊物質の捕捉率が得られる。[Function] Neutralization / filtration operation is performed by supplying necessary and sufficient amount of chemicals only to the unit dust collecting mechanism that has been discharged while passing through the gas and has completed the operation. <Br / > By forming a precoat layer that controls the application in a short time, high-performance acidic harmful gas removal can be performed from the beginning without lowering the removal rate.
The removal rate and the capture rate of dust and airborne substances can be obtained.
【００３０】[0030]
【実施例】以下、本発明の一実施例を図面を参照して説
明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
【００３１】図１及び図２は、本発明に係るプレコート
式バグフィルタ装置の概略構造を示し、図３は濾布表面
における付着状態を示す。[0031] Figures 1 and 2 show a schematic structure of a precoat type bag filter equipment according to the present invention, Figure 3 shows the attachment state in the filter cloth surface.
【００３２】図１及び図２において、１はプレコート式
バグフィルタ装置を構成する複数個の単位集じん機構を
収納するケーシングであり、それぞれの単位集じん機構
は、複数の濾布２を懸架する仕切板３によって上部の清
浄ガス通路４と下部の気体流入室５に区分されている。In FIGS. 1 and 2, reference numeral 1 denotes a casing for accommodating a plurality of unit dust collecting mechanisms constituting a precoat type bag filter device, and each unit dust collecting mechanism suspends a plurality of filter cloths 2. The partition plate 3 divides the upper part of the clean gas passage 4 and the lower part of the gas inflow chamber 5.
【００３３】前記清浄ガス通路４は、気体流入室５に複
数の濾布２を介して連通された空間であり、各清浄ガス
通路４は隔たりなく連通されており、清浄ガスダクト４
１を通じて図示しない誘引通風機に連接されている。The clean gas passage 4 is a space communicated with the gas inflow chamber 5 through a plurality of filter cloths 2. The clean gas passages 4 are communicated with each other without any separation, and the clean gas duct 4 is provided.
1 is connected to an unillustrated induction fan.
【００３４】清浄ガス通路４には、複数の濾布２の横１
列に対して、空気吹込管６が１本ずつ配設され、空気吹
込管６は空気開閉弁６１を通じて空気ヘッダ６２に接続
され、図示しない圧縮空気源に連接されている。In the clean gas passage 4, a plurality of filter cloths 2 beside 1
One air blowing pipe 6 is provided for each row, and the air blowing pipes 6 are connected to an air header 62 through an air opening / closing valve 61 and are connected to a compressed air source (not shown).
【００３５】さらに、空気吹込管６の下部には、複数の
濾布２内に払い落し用圧縮空気を吹込むためのノズル６
３が該濾布２の開口部に対峙して配設されている。これ
ら空気吹込管６、空気開閉弁６１、空気ヘッダ６２、ノ
ズル６３及び圧縮空気源によりダスト払い落し機構を構
成している。Further, at the lower part of the air blowing pipe 6, a nozzle 6 for blowing blown compressed air into the plurality of filter cloths 2 is provided.
The filter cloth 3 is disposed so as to face the opening of the filter cloth 2. The air blowing pipe 6, the air opening / closing valve 61, the air header 62, the nozzle 63, and the compressed air source constitute a dust removing mechanism.
【００３６】前記気体流入室５は、複数の隔壁１１によ
り区画された複数の濾過室５１と各濾過室５１の下方に
連なり同じく区画されたホッパ室５２に分割されてお
り、各ホッパ室５２の下部には、濾布２から剥離・落下
する粉じん等を排出するためのダスト排出機構５３が連
接されている。The gas inflow chamber 5 is divided into a plurality of filtration chambers 51 partitioned by a plurality of partition walls 11 and a hopper chamber 52 which is continuous below the filtration chambers 51 and is similarly partitioned. A dust discharging mechanism 53 for discharging dust or the like that is peeled off and dropped from the filter cloth 2 is connected to the lower portion.
【００３７】前記複数のホッパ室５２間に形成された空
間には、主煙道７が構築されており、この主煙道７より
各ホッパ室５２に至る分岐煙道７１には、補修時に使用
される排ガス開閉ダンパ７２が装備されている。A main flue 7 is constructed in the space formed between the plurality of hopper chambers 52, and a branch flue 71 extending from the main flue 7 to each hopper chamber 52 is used for repair.
The exhaust gas opening / closing damper 72 is installed .
【００３８】上述した主煙道７と、分岐煙道７１及び排
ガス開閉ダンパ７２とにより含じん気体導入ダクトが構
成されており、各ホッパ室５２には、図示しない焼却炉
または燃焼炉で発生したばいじんや酸性有害ガス等を含
む排ガス８１が流入する。The above-mentioned main flue 7 , branch flue 71 and exhaust
A dust-containing gas introduction duct is configured with the gas opening / closing damper 72, and an exhaust gas 81 containing dust and acid harmful gas generated in an incinerator or a combustion furnace (not shown) flows into each hopper chamber 52.
【００３９】また、各ホッパ室５２には、図示しない有
害ガス除去装置から薬剤調節弁９１を介して輸送される
消石灰等の中和用薬剤９２を供給する薬剤供給口９が別
個に配設されている。これら薬剤供給口９、薬剤調節弁
９１及び有害ガス除去装置により薬剤供給装置を構成し
ている。Further, each hopper chamber 52 is separately provided with a chemical supply port 9 for supplying a neutralizing chemical 92 such as slaked lime transported from a harmful gas removing device (not shown) through a chemical regulating valve 91. ing. The drug supply port 9, the drug control valve 91, and the harmful gas removing device constitute a drug supply device.
【００４０】次に、上述のように構成された本発明に係
るバグフィルタ装置における通常の濾過作業及び払い落
しから濾過作業再開までの動作について説明する。Next, a description will be given of the normal filtering operation and the operation from the removal to the restarting of the filtering operation in the bag filter device according to the present invention configured as described above.
【００４１】主煙道７から分岐煙道７１に入った排ガス
８１は、開放されている排ガス開閉ダンパ７２を介して
ホッパ室５２に流入し、上昇して複数の濾布２の表面に
形成された図３に示すプレコート層２１を通過する。そ
の際、排ガス８１中に保有するばいじんはプレコート層
２１に吸着・濾過させるとともに、同じく含有する酸性
有害ガスは中和用薬剤９２との中和作用により除去して
排ガス８１は清浄ガス８２となり、清浄ガス通路４に排
出される。Exhaust gas 81 entering the branch flue 71 from the main flue 7 flows into the hopper chamber 52 through the open flue gas opening / closing damper 72 , and rises to cause a plurality of filter cloths 2 to flow. It passes through the precoat layer 21 shown in FIG. 3 formed on the surface. At that time, the dust contained in the exhaust gas 81 is adsorbed and filtered by the precoat layer 21, and the acidic harmful gas contained therein is removed by the neutralizing action with the neutralizing agent 92, and the exhaust gas 81 becomes the clean gas 82. It is discharged to the clean gas passage 4.
【００４２】これは、例えば図２の右側の単位集じん機
構の状態である。This is the state of the unit dust collecting mechanism on the right side of FIG. 2, for example.
【００４３】この濾過作業の継続に伴い、プレコート層
２１の表面にばいじんが堆積し、図３に示すばいじん層
２２を形成して行くが、このばいじん層２２の成長によ
り排ガス８１の通気抵抗が増大すれば、通ガス状態のま
ま、払い落し作業に入る。As the filtration work is continued, dust is accumulated on the surface of the precoat layer 21 to form the dust layer 22 shown in FIG. 3. The growth of the dust layer 22 increases the ventilation resistance of the exhaust gas 81. If you do so, you can start the removal work with the gas passing.
【００４４】即ち、この濾過室５１に対応する空気開閉
弁６１を開放して、図示しない空気源の圧縮空気を、ノ
ズル６３から、上記濾過室５１内の濾布２内に短時間ジ
ェット噴射させれば、清浄ガス通路４内を流通している
清浄ガス８２の一部は、ジェット噴流に誘起された２次
気流となり、噴射空気と共に濾布２内に逆流し、ジェッ
ト噴流の衝撃波と２次空気の逆流効果により、濾布２表
面に付着するプレコート層２１及びばいじん層２２より
成る捕集灰を短時間で剥離させることができる。That is, the air opening / closing valve 61 corresponding to the filtration chamber 51 is opened, and compressed air from an air source (not shown) is jetted from the nozzle 63 into the filter cloth 2 in the filtration chamber 51 for a short time. Then, a part of the clean gas 82 flowing in the clean gas passage 4 becomes a secondary air flow induced by the jet jet, and flows back into the filter cloth 2 together with the jet air, and the shock wave of the jet jet and the secondary wave. Due to the backflow effect of air, the collected ash composed of the precoat layer 21 and the dust layer 22 attached to the surface of the filter cloth 2 can be peeled off in a short time .
【００４５】この噴射を単位集じん機構を構成する濾布
群の全ての列に対して行えば、この区画の払い落し作業
が完了する。If this injection is carried out for all the rows of the filter cloth group constituting the unit dust collecting mechanism, the work for removing this section is completed.
【００４６】この払い落し作業の過程を示すものとし
て、図２の中央の単位集じん機構において、左端の濾布
２が、濾過作業中にプレコート層２１及びばいじん層２
２から成る捕集灰が付着している状態、中央の濾布２が
空気開閉弁６１を開放してノズル６３から圧縮空気を噴
射して捕集灰を剥離せしめ、粉じんが落下中の状態、右
端の濾布２が、前記の払い落し作業が終了して通ガスを
始めた状態を示している。In order to show the process of this removal operation, in the unit dust collecting mechanism in the center of FIG. 2, the filter cloth 2 at the left end is the precoat layer 21 and the dust layer 2 during the filtering operation.
The state in which the collected ash consisting of 2 is attached, the central filter cloth 2 opens the air on-off valve 61 and injects compressed air from the nozzle 63 to separate the collected ash, and the dust is falling. The filter cloth 2 at the right end shows a state in which the above-mentioned scrubbing work is completed and gas is started.
【００４７】そして、剥離した捕集灰は、ホッパ室５２
の底部に堆積した後、ダスト排出機構５３により外部に
排出される。The separated collected ash is collected in the hopper chamber 52.
After being deposited on the bottom of the, the dust is discharged to the outside by the dust discharging mechanism 53.
【００４８】以上の払い落し作業が終れば、当該単位集
じん機構の薬剤調節弁９１を開放して、図示しない有害
ガス除去装置からの中和用薬剤９２を、薬剤供給口９よ
り、短時間で大量に供給する。この単位集じん機構は、
通気抵抗が最も低下している状態であり、図示しない誘
引通風機の吸引力により、大量の排ガス８１が高速で通
過するために、ホッパ室５２への落下もなく、濾布２の
表面に中和用薬剤９２のみによるプレコート層２１を一
挙に再生することができる。After the above-mentioned cleaning operation is completed, the chemical regulating valve 91 of the unit dust collecting mechanism is opened to supply the neutralizing chemical 92 from the harmful gas removing device (not shown) from the chemical supply port 9 for a short time. Supply in large quantities. This unit dust collection mechanism
The ventilation resistance is the lowest, and a large amount of exhaust gas 81 passes at a high speed by the suction force of an unillustrated draft fan, so that the exhaust gas 81 does not fall into the hopper chamber 52 and does not fall on the surface of the filter cloth 2. The precoat layer 21 with only the Japanese medicine 92 can be regenerated at once.
【００４９】プレコート層２１の形成作業が終われば、
薬剤調節弁９１を閉じて通常の濾過作業に戻る。When the work of forming the precoat layer 21 is completed,
The medicine control valve 91 is closed and the normal filtration operation is resumed.
【００５０】このような動作が、各濾過室５１に対して
順次行われるが、例えば図７に示す如く、事前にプレコ
ート層を形成してあるため、短時間の払い落し及びプレ
コート期間を除き、ばいじん及び有害ガス排出濃度は低
位で安定させる事ができる。Such an operation is sequentially performed for each filtration chamber 51. However, as shown in FIG. 7, for example, since the precoat layer is formed in advance, except for the short-time removal and the precoat period. Soot and harmful gas emission concentrations can be stabilized at low levels.
【００５１】本例では、払い落し作業開始条件を通気抵
抗増大で説明したが、清浄ガス通路４に排ガス濃度計を
設置し、中和作用により中和用薬剤９２の反応が終わっ
た事を検出してもよいし、通気抵抗増大との組合せで行
ってもよい。In this example, the conditions for starting the cleaning work were explained by increasing the ventilation resistance, but an exhaust gas concentration meter was installed in the clean gas passage 4 to detect the end of the reaction of the neutralizing agent 92 due to the neutralizing action. Alternatively, it may be performed in combination with an increase in ventilation resistance.
【００５２】このように払い落し作業を、ばいじんの堆
積による通気抵抗増加や薬剤の中和反応完了をもって行
うことで、プレコート層厚を計画的に設定しておけば、
反応済薬剤のみを排出することができ、薬剤の効率的利
用が計られるのみでなく、排出する捕集灰の量が削減で
きるために、２次公害発生の因となる捕集灰の事後処理
費用が削減できる。If the pre-coating layer thickness is systematically set by carrying out the cleaning-off operation in this way with the increase of the ventilation resistance due to the accumulation of dust and the completion of the neutralization reaction of the chemicals,
The post-treatment of collected ash that causes secondary pollution because not only the reacted chemicals can be discharged, the efficient use of the chemicals can be measured and the amount of collected ash discharged can be reduced. Cost can be reduced.
【００５３】また、本例では、薬剤供給口９をホッパ室
５２に配設したが、分岐煙道７１に配設しても良く、さ
らに、本例では主煙道７を複数のホッパ室５２が形成す
る空間に配設した例で説明したが、主煙道７は各ホッパ
室５２の外側部に配設してもよい。Further, in this example, the chemical supply port 9 is arranged in the hopper chamber 52, but it may be arranged in the branch flue 71, and in this example, the main flue 7 is arranged in a plurality of hopper chambers 52. Although the example in which the main flue 7 is arranged in the space formed by the above is described, the main flue 7 may be arranged outside the hopper chambers 52.
【００５４】[0054]
【発明の効果】以上述べたように、本発明は、平常操業
中に通ガスを停止することなく払い落し及びプレコート
作業を行うものであり、バグフィルタ装置を構成する単
位集じん機構ごとに配設された薬剤供給装置により、払
い落し作業を完了した単位集じん機構のみに、必要にし
て十分な量の薬剤を一挙に供給して中和及び濾過作業を
司るプレコート層を短時間で形成し、次回払い落しまで
は薬剤を供給しない方式であるために、払い落し作業中
の運転休止室が不要になるだけでなく、気体流開閉用弁
・ダンパ類も必要としないため、設備費が削減できると
ともに、保守点検作業も容易に行うことができる。As described above, according to the present invention, the gas passing through and the precoating work are performed without stopping the gas flow during the normal operation. With the chemical supply device installed, a necessary and sufficient amount of chemicals is supplied all at once to only the unit dust collection mechanism that has completed the removal work, and a precoat layer that controls neutralization and filtration work is formed in a short time. , reduction in order until Shake out next is a method that does not supply the drug, as well as outage chamber during brushing work is not necessary, because it does not require even the gas flow-off valve damper such, equipment cost In addition to being able to do so, maintenance and inspection work can be performed easily.
【００５５】また、払い落し作業は極めて短時間であ
り、プレコート層の生成も早いために、従来の方式のよ
うに除去率が長時間低下することなく、当初から高性能
の酸性有害ガス除去率及びばいじんや浮遊物質の捕捉率
が得られ、装置全体の性能を安定して継続させるととも
に、薬剤の有効利用が可能となり、排出灰量を減少せし
める事ができる。Further, since the cleaning-off work is extremely short and the precoat layer is formed quickly, the removal rate does not decrease for a long time as in the conventional method, and the removal rate of acidic harmful gas of high performance is high from the beginning. In addition, a capture rate of soot and dust and suspended matter can be obtained, the performance of the entire apparatus can be stably continued, and the chemicals can be effectively used, and the amount of discharged ash can be reduced.
【図１】本発明に係るプレコート式バグフィルタ装置の
運転制御方法により運転されるプレコート式バグフィル
タ装置の概略構成を示す側面視の断面図である。FIG. 1 is a cross-sectional side view showing a schematic configuration of a precoat type bag filter device operated by an operation control method of a precoat type bag filter device according to the present invention.
【図２】プレコート式バグフィルタ装置の概略構成を示
す正面視と図１のＡ−Ａ断面とを合成した図である。FIG. 2 is a diagram in which a front view showing a schematic configuration of a precoat type bag filter device and a cross section taken along the line AA of FIG. 1 are combined.
【図３】濾布表面における付着・堆積状態を示す拡大図
である。FIG. 3 is an enlarged view showing a state of adhesion and deposition on the surface of the filter cloth.
【図４】従来の排ガス同伴方式のプレコート式バグフィ
ルタ装置の概略を示す側面視の断面図である。FIG. 4 is a side sectional view schematically showing a conventional exhaust gas entrainment type precoat type bag filter device.
【図５】図４におけるＢ−Ｂ断面図である。5 is a sectional view taken along line BB in FIG.
【図６】従来の排ガス同伴方式のプレコート式バグフィ
ルタ装置の概略を示す正面視の断面図である。FIG. 6 is a cross-sectional front view showing the outline of a conventional exhaust gas entrainment type precoat bag filter device.
【図７】従来の排ガスしゃ断方式と本発明に係るプレコ
ート式バグフィルタ装置の払い落し時の状況を示す比較
図である。FIG. 7 is a comparative view showing a situation when the conventional exhaust gas cutoff method and the precoat type bag filter device according to the present invention are removed.
２ 濾布 ２１ プレコート層 ５１ 濾過室 ５２ ホッパ室 ９２ 薬剤 2 Filter cloth 21 Precoat layer 51 Filtration chamber 52 Hopper chamber 92 Chemicals
Claims (1)
集じん機構と、これら単位集じん機構に共通の清浄ガス
通路とから構成された多室形プレコート式バグフィルタ
装置の運転制御方法であって、 前記バグフィルタ装置を構成する単位集じん機構ごとに
配設された薬剤供給装置により、払い落し作業を完了し
た単位集じん機構のみに、必要にして十分な量の薬剤を
通ガス状態のままで所定時間供給することにより、中和
及び濾過作業を司るプレコート層を短時間で形成し、次
回払い落しまでは薬剤を供給することなく濾過作業を行
い、この後払い落し作業を通ガス状態のままで行うこと
を特徴とする多室形プレコート式バグフィルタ装置の運
転制御方法。1. A plurality of unit precipitators mechanism consisting Filtration chamber and the hopper compartment, common clean gas to these units precipitator mechanism
A method for controlling the operation of a multi-chamber type pre-coated bag filter device composed of a passage , wherein a drug supply device provided for each unit dust collecting mechanism constituting the bag filter device completes the removal work. Only the unit dust collection mechanism needs and supplies a sufficient amount of drug.
Neutralize by supplying gas for a specified period of time
In addition, the precoat layer that controls the filtration work is formed in a short time, and the filtration work is performed without supplying the chemicals when the next cleaning is performed.
A method for controlling operation of a multi-chamber type pre-coating bag filter device, which is characterized in that the cleaning operation is carried out in a gas state after this .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4349331A JP2564457B2 (en) | 1992-12-28 | 1992-12-28 | Operation control method of multi-chamber type pre-coat type bag filter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4349331A JP2564457B2 (en) | 1992-12-28 | 1992-12-28 | Operation control method of multi-chamber type pre-coat type bag filter device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06198111A JPH06198111A (en) | 1994-07-19 |
| JP2564457B2 true JP2564457B2 (en) | 1996-12-18 |
Family
ID=18403057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4349331A Expired - Fee Related JP2564457B2 (en) | 1992-12-28 | 1992-12-28 | Operation control method of multi-chamber type pre-coat type bag filter device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2564457B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8562724B2 (en) * | 2011-03-01 | 2013-10-22 | General Electric Company | Methods and systems for removing pollutants from fluid stream |
| CN103127780A (en) * | 2011-11-30 | 2013-06-05 | 天津市明生环保工程设备有限公司 | High temperature bag dedusting exhaust gas purifier |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5435713A (en) * | 1977-08-26 | 1979-03-16 | Nec Corp | Magnetic card reader |
| JPH0753216B2 (en) * | 1988-04-11 | 1995-06-07 | 日本スピンドル製造株式会社 | Dust collector |
-
1992
- 1992-12-28 JP JP4349331A patent/JP2564457B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06198111A (en) | 1994-07-19 |
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