JPH0683768B2 - Dust remover - Google Patents
Dust removerInfo
- Publication number
- JPH0683768B2 JPH0683768B2 JP61244093A JP24409386A JPH0683768B2 JP H0683768 B2 JPH0683768 B2 JP H0683768B2 JP 61244093 A JP61244093 A JP 61244093A JP 24409386 A JP24409386 A JP 24409386A JP H0683768 B2 JPH0683768 B2 JP H0683768B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- backwash
- filter cylinder
- dust
- backwash gas
- 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
- 239000000428 dust Substances 0.000 title claims description 63
- 239000000919 ceramic Substances 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000035699 permeability Effects 0.000 claims description 2
- 230000035939 shock Effects 0.000 description 20
- 239000007787 solid Substances 0.000 description 16
- 238000011001 backwashing Methods 0.000 description 11
- 239000004744 fabric Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 229910052878 cordierite Inorganic materials 0.000 description 2
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229910000505 Al2TiO5 Inorganic materials 0.000 description 1
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- AABBHSMFGKYLKE-SNAWJCMRSA-N propan-2-yl (e)-but-2-enoate Chemical compound C\C=C\C(=O)OC(C)C AABBHSMFGKYLKE-SNAWJCMRSA-N 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- -1 β-cordrite Chemical compound 0.000 description 1
- 229910052644 β-spodumene Inorganic materials 0.000 description 1
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
Description
【発明の詳細な説明】 「技術分野」 本発明は、通気性多孔質セラミックスからなる濾筒を有
する除塵装置に関し、特に逆洗気体吐出口を有する除塵
装置に関する。TECHNICAL FIELD The present invention relates to a dust remover having a filter cylinder made of breathable porous ceramics, and more particularly to a dust remover having a backwash gas discharge port.
「従来技術およびその問題点」 濾布を濾材とする濾過除塵装置は、従来より多用されて
いるが、こうした除塵装置にあっては、濾布が耐熱性に
乏しいため、含塵気体の温度が250℃を超える場合に
は、もはや使用できない。"Prior art and its problems" Filter dust removers using filter cloth as a filter medium have been widely used, but in such dust removers, the temperature of dust-containing gas is low because the filter cloth has poor heat resistance. Above 250 ° C it can no longer be used.
そこで、本出願人は、高温の含塵気体に対して使用でき
る除塵装置として、通気性多孔質セラミックス体などを
濾材とするものを提案してきた（特開昭59−225721号参
照）。この除塵装置においては、立設された通気性多孔
質セラミックス製の濾筒内に上方より含塵気体が供給さ
れ、清浄気体は濾筒の内側から外側に流出すると共に、
濾筒によって通過を阻止された粉塵は一部が濾筒内壁に
堆積し、大部分は濾筒内部を落下して濾筒の下方に設け
たダストホッパに集められる。Therefore, the present applicant has proposed, as a dust removing device that can be used for high-temperature dust-containing gas, a device using a breathable porous ceramics body or the like as a filter medium (see Japanese Patent Laid-Open No. 59-225721). In this dust remover, the dust-containing gas is supplied from above into the filter cylinder made of the air-permeable porous ceramic that is installed upright, and the clean gas flows out from the inside of the filter cylinder to the outside,
Part of the dust blocked by the filter cylinder is deposited on the inner wall of the filter cylinder, and most of the dust falls inside the filter cylinder and is collected in a dust hopper provided below the filter cylinder.
ところで、こうした濾過除塵装置においては、連続して
除塵操作を実施していくと、だんだんに濾材が目詰まり
を起こし、濾過に要する差圧が上昇し、濾過速度が低下
してくる。このため、所定時間の除塵操業毎に、清浄気
体側から含塵気体側に気体を流して目詰まりしていた粉
塵を除去する、いわゆる逆洗操作が必要となる。By the way, in such a filter and dust remover, when the dust removing operation is continuously performed, the filter medium gradually becomes clogged, the differential pressure required for filtration increases, and the filtration speed decreases. Therefore, it is necessary to perform a so-called backwashing operation in which a dust is clogged by flowing gas from the clean gas side to the dust-containing gas side every dust removal operation for a predetermined time.
濾布を用いる除塵装置においては、除塵操作時の清浄気
体出口部配管内に高圧気体噴出ノズルを濾布側にその開
口部を向けて設置し、逆洗操作時にここから高速気体を
噴出させる逆洗方法がよく知られている。この方法によ
れば、濾布に向けて噴出すると、濾布がはたはたと振動
し、濾布の内側に堆積していた粉塵が払い落される。In a dust remover that uses a filter cloth, a high-pressure gas jet nozzle is installed in the clean gas outlet pipe during dust removal operation with its opening facing the filter cloth, and a high-speed gas is jetted from here during the backwash operation. Washing methods are well known. According to this method, when ejected toward the filter cloth, the filter cloth vibrates and flutters, and the dust accumulated inside the filter cloth is removed.
しかし、こうした濾布除塵に用いられる逆洗方法を通気
性多孔質セラミックス（以下、固体フィルタという）を
濾材とする除塵装置にそのまま適用すると次のような問
題点が生じる。まず、処理気体の温度が高い場合、室温
程度の逆洗気体を直接吹き付けると、固体フィルタは、
セラミックスからなるため熱衝撃に弱く、局部的に急激
な温度差が生じ、熱衝撃破損に至ることである。また、
清浄気体導出ダクトを通して逆洗気体を流入させるよう
にした場合には、高温の清浄気体と低温の逆洗気体とが
よく混合されず、温度が均一化されないまま固体フィル
タに当たるので、局部的に急激な温度差が生じ、さらに
熱衝撃破損を起こしやすくなる。さらに、逆洗気体を高
速で固体フィルタに吹き付けた場合には、機械的衝撃に
よる破損が起こる恐れもある。However, if the backwashing method used for removing dust on the filter cloth is directly applied to a dust removing device using a breathable porous ceramics (hereinafter referred to as a solid filter) as a filter medium, the following problems occur. First, if the temperature of the treated gas is high, direct spraying a backwash gas at about room temperature will cause the solid filter to
Since it is made of ceramics, it is vulnerable to thermal shock, and a rapid temperature difference locally occurs, resulting in thermal shock damage. Also,
When the backwash gas is made to flow through the clean gas outlet duct, the high temperature clean gas and the low temperature backwash gas are not mixed well and hit the solid filter without the temperature being homogenized. Temperature difference occurs, and thermal shock damage is more likely to occur. Further, when the backwash gas is sprayed onto the solid filter at a high speed, damage due to mechanical shock may occur.
「発明の目的」 本発明の目的は、処理気体温度と逆洗気体温度との間で
温度差がある場合に、逆洗時に固体フィルタで局所的に
生じる急激な温度差を緩和して熱衝撃による破損を防止
し、かつ、逆洗気体が固体フィルタに与える機械的衝撃
を緩和して機械的衝撃による破損も防止するようにした
除塵装置を提供することにある。"Object of the Invention" An object of the present invention is to reduce the thermal shock caused by locally abrupt temperature difference in the solid filter during backwashing when there is a temperature difference between the treatment gas temperature and the backwashing gas temperature. (EN) It is possible to provide a dust removing device which prevents damage due to mechanical shock and also prevents mechanical damage caused by backwash gas on a solid filter and prevents damage due to mechanical shock.
「発明の構成」 本発明による除塵装置は、通気性を有する多孔質セラミ
ックスからなる濾筒の内側に含塵気体を供給し、前記濾
筒の外側から清浄気体を取り出す除塵装置において、前
記清浄気体側の空間に逆洗気体吐出口を設け、前記逆洗
気体の吐出方向と前記濾筒の軸方向とが、実質的に平行
となるように、もしくは、実質的に同一平面上にないよ
うに、前記逆洗気体吐出口を配置したことを特徴とす
る。"Structure of the invention" The dust remover according to the present invention is a dust remover which supplies a dust-containing gas to the inside of a filter cylinder made of porous ceramics having air permeability and takes out clean gas from the outside of the filter cylinder. The backwash gas discharge port is provided in the space on the side so that the discharge direction of the backwash gas and the axial direction of the filter cylinder are substantially parallel to each other, or are not substantially on the same plane. The backwash gas discharge port is arranged.
このように、本発明では、逆洗気体が濾筒に直接当たら
ないように逆洗気体吐出口を配置したので、逆洗気体は
比較的長い経路を通って高温の清浄気体と混合した後、
濾筒に当たるようになる。このため、逆洗気体は昇温さ
れて固体フィルタに当たるので、固体フィルタに急激な
温度差が局所的に生じることはなく、熱衝撃による破損
が防止される。また、逆洗気体が固体フィルタに当たる
までに清浄気体と混合してその流速を弱められるので、
固体フィルタに与える機械的衝撃も緩和され、機械的衝
撃による破損も防止される。Thus, in the present invention, since the backwash gas discharge port is arranged so that the backwash gas does not directly hit the filter cylinder, the backwash gas is mixed with the hot clean gas through a relatively long path,
It will hit the filter tube. For this reason, since the backwash gas is heated and hits the solid filter, a sudden temperature difference is not locally generated in the solid filter, and damage due to thermal shock is prevented. In addition, the backwash gas can be mixed with the clean gas before the solid filter hits to reduce the flow rate,
The mechanical shock applied to the solid filter is also mitigated, and damage due to the mechanical shock is prevented.
本発明の好ましい態様においては、逆洗気体の吐出方向
と濾筒の軸方向とが実質的に平行となるように逆洗気体
吐出口を配置する。これにより、エゼクタなどを用いて
逆洗する場合にディフューザ部を缶体内に収納でき、逆
洗装置を含めたこの除塵装置の設置面積が節減できる。In a preferred aspect of the present invention, the backwash gas discharge port is arranged so that the discharge direction of the backwash gas and the axial direction of the filter cylinder are substantially parallel to each other. As a result, when backwashing using an ejector or the like, the diffuser portion can be housed in the can body, and the installation area of this dust removing device including the backwashing device can be saved.
本発明の別の好ましい態様においては、濾筒が挿通され
る管板によって清浄気体側の空間が複数の小空間に区画
され、各小空間に逆洗気体吐出口を配置する。これによ
り、除塵操業を停止することなく逆洗操業が実施でき
る。In another preferred aspect of the present invention, the clean gas side space is divided into a plurality of small spaces by a tube plate through which the filter cylinder is inserted, and the backwash gas discharge port is arranged in each small space. Thereby, the backwash operation can be carried out without stopping the dust removal operation.
本発明の別の好ましい態様においては、逆洗気体の吐出
方向が濾筒を収容する缶体の内周壁に沿うように逆洗気
体吐出口を配置する。これにより逆洗用のディフューザ
部を缶体に沿うような位置に設置でき、缶体内に多数本
の濾筒を収容できるとともに、逆洗装置を含めたこの除
塵装置の設置面積が節減できる。In another preferred embodiment of the present invention, the backwash gas discharge port is arranged so that the direction of discharge of the backwash gas is along the inner peripheral wall of the can body housing the filter cylinder. Thus, the backwash diffuser portion can be installed at a position along the can body, a large number of filter cylinders can be accommodated in the can body, and the installation area of this dust removing device including the backwash device can be reduced.
固体フィルタの材質としては、耐熱性や耐食性に優れる
ことからセラミックス製のものが採用される。さらに、
耐熱性を活かして高温含塵気体の除塵をする際、運転開
始・停止時の急激な温度変化、あるいは含塵気体自身の
温度変化がまれではないことを考慮すると、耐熱衝撃性
にも優れたセラミックス製のものが特に好ましい。具体
的にはコージライト質、β−スポジュメン質、ジルコニ
ア質、チタン酸アルミニウム質などのセラミックス製の
ものが好ましく例示できる。As the material of the solid filter, a ceramic material is used because it has excellent heat resistance and corrosion resistance. further,
Considering that rapid temperature change at the start and stop of operation or temperature change of dust-containing gas itself is not rare when removing dust of high-temperature dust-containing gas by taking advantage of heat resistance, it has excellent thermal shock resistance. Ceramics are particularly preferable. Specific examples include those made of ceramics such as cordierite, β-spodumene, zirconia, and aluminum titanate.
濾筒は中空筒状、特には中空円筒状とされ、その内側の
空間に含塵気体が供給される。これにより、清浄気体側
の空間が連通して濾筒の外側をぐるっととり囲むことと
なり、一個ないしは数個の逆洗気体吐出口を清浄気体側
空間の特定位置に局在させても、清浄気体側空間の全域
に逆洗気体を流入させることができる。また、中空円筒
状とすることにより、濾筒の内外の圧力差によって濾筒
が破損する恐れも極小化される。さらに、濾筒は水平方
向あるいは傾斜方向に配設されてもよいが、好ましくは
鉛直方向に配設される。これにより、濾別された粉塵が
次々と落下して除塵効率の低下を抑制できる。The filter cylinder has a hollow cylinder shape, particularly a hollow cylinder shape, and a dust-containing gas is supplied to the space inside thereof. As a result, the space on the clean gas side communicates and surrounds the outside of the filter cylinder, and even if one or several backwash gas discharge ports are localized at specific positions in the clean gas side space, The backwash gas can flow into the entire side space. Further, the hollow cylindrical shape minimizes the risk that the filter cylinder is damaged due to the pressure difference between the inside and outside of the filter cylinder. Further, the filter cylinder may be arranged in the horizontal direction or the inclined direction, but is preferably arranged in the vertical direction. As a result, it is possible to prevent the dust particles that have been separated by filtration from falling one after another and reducing the dust removal efficiency.
逆洗気体吐出口は、清浄気体側の空間に導入された独立
の導入管に取付けられてもよいが、好ましくは清浄気体
導出ダクトに設けられる。このように、逆洗気体吐出口
と清浄気体導出ダクトとを兼用することによって、缶体
に設ける開口部の数を節減できる。The backwash gas discharge port may be attached to an independent introduction pipe introduced into the space on the clean gas side, but is preferably provided in the clean gas outlet duct. In this way, by using the backwash gas discharge port and the clean gas outlet duct as well, it is possible to reduce the number of openings provided in the can body.
逆洗気体吐出口を清浄気体導出ダクトに設けるにあたっ
ては、二重管型および分岐管型が好ましく提起できる。In providing the backwash gas discharge port in the clean gas outlet duct, a double pipe type and a branch pipe type can be preferably proposed.
二重管型とは清浄気体導出ダクトの内部に、より小径の
逆洗気体導入管を同軸に設けるもので、逆洗気体導入管
から気流、特にはパルスジェット方式のような高速気流
を吹き出すことにより、周辺に存在する清浄気体をもエ
ゼクタ効果により附随的に取込んで、吹き出された気体
量に比べてはるかに大量の気体を逆洗気体として利用で
きることとなる。The double-tube type is a system in which a smaller-diameter backwash gas inlet pipe is coaxially installed inside the clean gas outlet duct, and the airflow, especially the high-speed airflow such as the pulse jet method, is blown out from the backwash gas inlet pipe. As a result, the clean gas existing in the vicinity is additionally taken in by the ejector effect, and a much larger amount of gas than the blown out gas can be used as the backwash gas.
分岐管型とは、清浄気体導出ダクト壁に開口する分岐管
を設け、好ましくはこの開口部より下流の清浄気体導出
ダクトおよび分岐管にそれぞれ弁を設けるもので、これ
によれば二重管型の場合ほどには高速でなくてもある程
度に高速の気流を吹き出すことにより、所要量の逆洗気
体を確実かつ容易に得られる。The branch pipe type is one in which a branch pipe that opens to the wall of the clean gas outlet duct is provided, and preferably a valve is provided in each of the clean gas outlet duct and the branch pipe downstream of this opening, and according to this, a double pipe type The required amount of backwash gas can be reliably and easily obtained by blowing out a high-speed airflow to a certain degree even if the backwash gas is not as fast as in the above case.
「発明の実施例」 第２図、および第２図のＩ−Ｉ線にほぼ沿った断面を示
す第１図において、相互に適宜な間隔をもって複数本の
中空円筒状の濾筒11が円筒状の缶体12に収容されてい
る。この濾筒11はコージライト質、特にはβ−コージラ
イト質のセラミックス焼結体からなる通気性多孔質固体
でできている。"Embodiment of the Invention" In Fig. 2 and Fig. 1 which shows a cross section taken substantially along the line I-I in Fig. 2, a plurality of hollow cylindrical filter cylinders 11 are cylindrical at appropriate intervals. It is housed in a can body 12. The filter cylinder 11 is made of a breathable porous solid made of a cordierite, particularly β-cordrite, ceramic sintered body.
含塵気体導入口13を備えるヘッド14および粉塵切出し弁
15を備えるホッパ16が缶体12のそれぞれ上および下に付
設されている。複数枚（第１図にあっては４枚）の管板
17が管体12の内部に設けられて濾筒11を保持している。
管板17は濾筒11および缶体12とそれぞれ気密に保たれて
おり、となりあう管板17同士の間にそれぞれ清浄気体室
18を形成している。濾筒11の上端、下端はそれぞれヘッ
ダ14、ホッパ16に開口している。なお、管板17は少なく
とも２枚あればよく、また中間の管板はその上下の清浄
気体室18を連通せしめるものであってもよい。Head 14 with dust-containing gas inlet 13 and dust cut-out valve
Hoppers 16 with 15 are attached above and below the can 12, respectively. Multiple (4 in Fig. 1) tube sheets
17 is provided inside the tubular body 12 to hold the filter cylinder 11.
The tube sheet 17 is kept airtight with the filter tube 11 and the can body 12, respectively, and a clean gas chamber is provided between adjacent tube sheets 17.
Forming eighteen. The upper end and the lower end of the filter cylinder 11 are open to the header 14 and the hopper 16, respectively. At least two tube plates 17 may be provided, and the intermediate tube plate may be one that allows the upper and lower clean gas chambers 18 to communicate with each other.
各清浄気体室18内には、ヘッダ14側から所要の管板17を
気密に貫通して清浄気体導出ダクト21、22、23が導入さ
れている。各清浄気体導出ダクト21、22、23は濾筒11と
平行に配設され、先端にはそれぞれディフューザ24、2
5、26が取付けられており、各ディフューザ24、25、26
はそれぞれの清浄気体室18に開口している。また、各清
浄気体導出ダクト21、22、23内には、それと同軸的にそ
れぞれ逆洗気体導入管27、28、29が配設されている。各
逆洗気体導入管27、28、29の先端はそれぞれ縮径されて
逆洗気体吐出口30、31、32をなし、それぞれディフュー
ザ24、25、26の縮径部の手前に位置している。なお第１
図において、背後に位置する濾筒11は図示を省略した。In each of the clean gas chambers 18, clean gas outlet ducts 21, 22, 23 are introduced from the header 14 side through the required tube sheet 17 in an airtight manner. The clean gas outlet ducts 21, 22, 23 are arranged in parallel with the filter cylinder 11, and the diffusers 24, 2 are respectively provided at the tips.
5, 26 are installed and each diffuser 24, 25, 26
Open to the respective clean gas chambers 18. In addition, backwash gas introduction pipes 27, 28, 29 are coaxially arranged in the clean gas outlet ducts 21, 22, 23, respectively. The tips of the backwash gas introduction pipes 27, 28, 29 are respectively reduced in diameter to form backwash gas discharge ports 30, 31, 32, which are located in front of the reduced diameter portions of the diffusers 24, 25, 26, respectively. . The first
In the figure, illustration of the filter cylinder 11 located behind is omitted.
この除塵装置は次のように作動する。まず、除塵操作時
には、含塵気体導入口13から高温の含塵気体が導入さ
れ、分配されて各濾筒11の内部を流下する。流下に伴な
い、濾筒11により含塵気体は濾別されて、粉塵の一部は
濾筒11の内壁に堆積し、粉塵の多くは下方に落下してホ
ッパ16に溜まる。高温の清浄気体は濾筒11の濾壁を通過
して各清浄気体室18に入り、それぞれの清浄気体室18に
開口したディフューザ24、25、26および清浄気体導出ダ
クト21、22、23を通って系外に導出される。この間、濾
筒11は粉塵によって徐々に目詰まりを起こして濾過抵抗
が増大してくる。したがって、所定の除塵操業後には逆
洗操作を行なう。This dust remover operates as follows. First, at the time of a dust removing operation, a high temperature dust-containing gas is introduced from the dust-containing gas introduction port 13 and distributed to flow down inside each filter cylinder 11. Along with the flow down, the dust-containing gas is filtered out by the filter cylinder 11, part of the dust accumulates on the inner wall of the filter cylinder 11, and most of the dust falls downward and collects in the hopper 16. The hot clean gas passes through the filter wall of the filter cylinder 11 and enters each clean gas chamber 18, and passes through the diffusers 24, 25, 26 and the clean gas outlet ducts 21, 22, 23 opened in each clean gas chamber 18. Are out of the system. During this time, the filter cylinder 11 is gradually clogged with dust and the filtration resistance increases. Therefore, the backwash operation is performed after the predetermined dust removal operation.
逆洗操作時には、図示しないコンプレッサなどを作動さ
せて、高速の逆洗気体を逆洗気体導入管27、28、29に通
して逆洗気体吐出口30、31、32から噴出させる。逆洗気
体は、ディフューザ24、25、26の縮径部におけるエゼク
タ効果により周辺に存在する清浄気体をも取込んで、逆
洗気体吐出口30、31、32から噴出した気体の数倍の気体
量となって、ディフューザ24、25、26の開口部から各清
浄気体室18に吐出する。At the time of the backwashing operation, a compressor or the like (not shown) is operated, and high-speed backwashing gas is ejected from the backwashing gas discharge ports 30, 31, 32 through the backwashing gas introduction pipes 27, 28, 29. The backwash gas also takes in clean gas existing in the periphery due to the ejector effect in the reduced diameter portion of the diffusers 24, 25, 26, and is a gas several times as much as the gas ejected from the backwash gas discharge ports 30, 31, 32. The amount becomes the amount and is discharged into each clean gas chamber 18 through the openings of the diffusers 24, 25 and 26.
この場合、逆洗気体は、濾筒11と平行に下方に向けて吐
出するので、清浄気体室18内を屈曲し、ないしは巡回し
た後に、濾筒11に当たることになる。このため、逆洗気
体は高温の清浄気体と混合して昇温された後に濾筒11に
当たるので、濾筒11に急激な温度差が局所的に生じるこ
とはなく、熱衝撃による破損が防止される。また、逆洗
気体が濾筒11に当たるまでに清浄気体と混合してその流
速を弱められるので、濾筒11に与える機械的衝撃も緩和
され、機械的衝撃による破損も防止される。こうして、
逆洗気体が濾筒11の壁を外側から内側に通過し、これに
より目詰まりを起こさせていた粉塵が洗い出され、濾筒
11の気体通過抵抗が減少し、濾筒11が再生される。In this case, since the backwash gas is discharged downward in parallel with the filter cylinder 11, the backwash gas hits the filter cylinder 11 after being bent or circulated in the clean gas chamber 18. Therefore, the backwash gas hits the filter cylinder 11 after being mixed with a high temperature clean gas and heated, so that a sharp temperature difference does not locally occur in the filter cylinder 11 and damage due to thermal shock is prevented. It Further, since the backwash gas is mixed with the clean gas until it hits the filter cylinder 11 and the flow velocity thereof is weakened, the mechanical shock given to the filter cylinder 11 is alleviated and the damage due to the mechanical shock is prevented. Thus
The backwash gas passes through the wall of the filter cylinder 11 from the outside to the inside, whereby the dust causing the clogging is washed out, and the filter cylinder
The gas passage resistance of 11 is reduced and the filter cylinder 11 is regenerated.
なお、除塵操作と逆洗操作とは濾筒11の同一部位に対し
ては交互に行なわれるが、第１図に示すように、濾筒11
が相互に気密な複数の清浄気体室18に属している場合に
は、各清浄気体室18において交代的に逆洗操作を行なう
ことにより、除塵装置全体としては除塵操作を中断する
ことなく、逆洗操作を行なうことも可能である。例えば
上段の清浄気体室18内で逆洗操作を行なえば、逆洗気体
は上段の清浄気体室18から濾筒11の内側に入ってこの部
分の濾筒を再生すると共に、入ってきた逆洗気体は中段
または下段の濾筒11を通過して中段または下段の清浄気
体室18に出ていく。このような操業を順次、上段、中
段、下段の清浄気体室18において行なえば、除塵装置全
体としては除塵操作を中断せずに逆洗操作が可能であ
る。The dust removing operation and the backwashing operation are alternately performed on the same portion of the filter cylinder 11, but as shown in FIG.
, If they belong to a plurality of clean gas chambers 18 that are airtight to each other, by performing a backwash operation alternately in each clean gas chamber 18, the dust removing apparatus as a whole does not interrupt the dust removing operation, and It is also possible to perform a washing operation. For example, if a backwash operation is performed in the upper clean gas chamber 18, the backwash gas enters the inside of the filter cylinder 11 from the upper clean gas chamber 18 to regenerate the filter cylinder of this portion, and the backwash gas that has entered. The gas passes through the filter tube 11 in the middle or lower stage and goes out to the clean gas chamber 18 in the middle or lower stage. If such operations are sequentially performed in the clean gas chambers 18 in the upper, middle and lower stages, the backwash operation can be performed without interrupting the dust removing operation as the entire dust removing apparatus.
なお、上記実施例においては、逆洗気体導入管27、28、
29および逆洗気体吐出口30、31、32は濾筒11と平行に配
置され、逆洗気体が濾筒11と平行な方向に吐出するよう
になっていて好ましいが、第３図に示すように、逆洗気
体の吐出方向Ａと濾筒11の軸方向とがなす角度θが10°
以下であれば本発明の効果を得ることができる。この場
合、逆洗気体の吐出方向Ａは濾筒11に近づく方向でも離
れる方向でもよいし、また、逆洗気体導入管、清浄気体
導出ダクトは管板11を貫通することなく、缶体12の側胴
から直接に清浄気体室18に導入されていてもよい。In the above embodiment, the backwash gas introduction pipes 27, 28,
29 and the backwash gas discharge ports 30, 31, 32 are arranged in parallel with the filter cylinder 11 so that the backwash gas is discharged in a direction parallel to the filter cylinder 11, which is preferable, but as shown in FIG. In addition, the angle θ formed by the discharge direction A of the backwash gas and the axial direction of the filter cylinder 11 is 10 °.
The effects of the present invention can be obtained in the following cases. In this case, the discharge direction A of the backwash gas may be toward or away from the filter cylinder 11, and the backwash gas introduction pipe and the clean gas discharge duct do not pass through the tube sheet 11 and the can body 12 It may be introduced into the clean gas chamber 18 directly from the side body.
第４図に示す別の実施例においては、清浄気体導出ダク
ト33の先端に取付けられたディフューザ34がその拡径部
を直接缶体12に連結されている。この実施例の場合、清
浄気体導出ダクト33は缶体12の対向する外周２箇所に設
けられている。各清浄気体導出ダクト33内には、逆洗気
体導入管35がそれぞれ配置され、その先端の逆洗気体吐
出口36は、ディフューザ34の縮径部の手前に位置されて
いる。そして、この実施例の場合、清浄気体導出ダクト
33、ディフューザ34、逆洗気体導入管35および逆洗気体
吐出口36は、逆洗気体の吐出方向が缶体12の内周壁に沿
うように配置されている。なお、濾筒11の支持構造や含
塵気体の導入構造などは、第１図の実施例と同様であ
る。In another embodiment shown in FIG. 4, a diffuser 34 attached to the tip of the clean gas lead-out duct 33 has its expanded portion directly connected to the can body 12. In the case of this embodiment, the clean gas lead-out ducts 33 are provided at two locations on the outer periphery of the can body 12 which face each other. A backwash gas introduction pipe 35 is arranged in each clean gas outlet duct 33, and a backwash gas discharge port 36 at the tip thereof is positioned in front of the reduced diameter portion of the diffuser 34. In the case of this embodiment, the clean gas outlet duct
33, the diffuser 34, the backwash gas introduction pipe 35, and the backwash gas discharge port 36 are arranged so that the direction of discharge of the backwash gas is along the inner peripheral wall of the can body 12. The supporting structure of the filter cylinder 11 and the dust-containing gas introducing structure are the same as those in the embodiment of FIG.
この実施例においては、逆洗気体が缶体12の内周壁に沿
って吐出され、缶体12内を巡回した後、濾筒11に接触す
る。したがって、逆洗気体は、缶体12内の清浄気体と混
合して昇温された後、濾筒11に接触することになり、濾
筒11に急激な温度差が局所的に生じることはなく、熱衝
撃による破損が防止される。また、逆洗気体が濾筒11に
当たるまでに清浄気体と混合してその流速を弱められる
ので、濾筒11に与える機械的衝撃も緩和され、機械的衝
撃による破損も防止される。In this embodiment, the backwash gas is discharged along the inner peripheral wall of the can body 12, circulates in the can body 12, and then contacts the filter cylinder 11. Therefore, the backwash gas comes into contact with the filter cylinder 11 after being mixed with the clean gas in the can body 12 and heated, and a sharp temperature difference does not locally occur in the filter cylinder 11. , Damage due to thermal shock is prevented. Further, since the backwash gas is mixed with the clean gas until it hits the filter cylinder 11 and the flow velocity thereof is weakened, the mechanical shock given to the filter cylinder 11 is alleviated and the damage due to the mechanical shock is prevented.
なお、上記実施例では、清浄気体導出ダクト33、ディフ
ューザ34、逆洗気体導入管35および逆洗気体吐出口36
が、濾筒11の軸方向に垂直な平面に沿って配置されてい
るが、濾筒11の軸方向に垂直な平面に対してある角度を
もって斜めに配置されていてもよい。その場合、逆洗気
体は、缶体12の内周壁に沿って螺旋を描くように流出す
ることになる。また、上記実施例では、ふたつの逆洗気
体吐出口36が濾筒11の軸方向に対して同一垂直面上にあ
るが、これに代えて、複数の逆洗気体吐出口36が、濾筒
11に横断する異なる横断面上に設けられていてもよい。In the above embodiment, the clean gas outlet duct 33, the diffuser 34, the backwash gas introduction pipe 35 and the backwash gas discharge port 36.
Are arranged along a plane perpendicular to the axial direction of the filter cylinder 11, but may be obliquely arranged at an angle to the plane perpendicular to the axial direction of the filter cylinder 11. In that case, the backwash gas will flow out in a spiral shape along the inner peripheral wall of the can body 12. Further, in the above embodiment, the two backwash gas discharge ports 36 are on the same vertical plane with respect to the axial direction of the filter cylinder 11, but instead of this, a plurality of backwash gas discharge ports 36 are used.
It may also be provided on different cross-sections across 11.
上記各実施例はいずれも清浄気体導出ダクト内に逆洗気
体導入管を配置してあるが、缶体に対して清浄気体導出
ダクトと逆洗気体導入管とをそれぞれ個別に連結しても
よい。また逆洗気体吐出口36は缶体内に設けるか、ある
いは、缶体外であっても缶体に近接して設けることが望
ましい。In each of the above embodiments, the backwash gas introduction pipe is arranged in the clean gas lead-out duct, but the clean gas lead-out duct and the backwash gas lead-in pipe may be individually connected to the can body. . Further, it is desirable that the backwash gas discharge port 36 is provided inside the can, or is provided near the can even outside the can.
なお、第４図の実施例は第５図の矢線Ｂに示すような逆
洗気体吐出方法の場合であり、かつ、好ましいものであ
るが、矢線Ｃに示すような逆洗気体吐出方向も本発明の
効果を得られる。矢線Ｄに示すような逆洗気体吐出方向
は好ましくない。The embodiment shown in FIG. 4 is a case of the backwash gas discharge method as shown by the arrow B in FIG. 5 and is preferable, but the backwash gas discharge direction as shown by the arrow C is shown. Can also obtain the effect of the present invention. The backwash gas discharge direction as shown by the arrow D is not preferable.
「発明の効果」 以上説明したように、本発明によれば、逆洗気体が実質
的に濾筒に直接当たらないように逆洗気体吐出口を配置
したので、逆洗気体は比較的長い経路を通って高温の清
浄気体と混合した後、濾筒に当たるようになる。このた
め、逆洗気体は昇温されて固体フィルタに当たるので、
固体フィルタに急激な温度差が局所的に生じることはな
く、熱衝撃による破損が防止される。また、逆洗気体が
固体フィルタに当たるまでに清浄気体と混合してその流
速を弱められるので、固体フィルタに与える機械的衝撃
も緩和され、機械的衝撃による破損も防止される。[Advantages of the Invention] As described above, according to the present invention, the backwash gas discharge port is arranged so that the backwash gas does not substantially directly contact the filter cylinder. After passing through and mixing with the hot clean gas, it comes into contact with the filter tube. Therefore, the backwash gas is heated and hits the solid filter,
No sudden temperature difference locally occurs in the solid filter, and damage due to thermal shock is prevented. Further, since the backwash gas is mixed with the clean gas to weaken the flow velocity thereof before hitting the solid filter, the mechanical shock given to the solid filter is mitigated and the damage due to the mechanical shock is prevented.
第１図は本発明の実施例による除塵装置を一部切欠いて
示す縦断面図、第２図は第１図におけるII−II線に沿っ
た横断面図、第３図は第１図の実施例の変形例を模式的
に示す説明図、第４図は本発明の他の実施例による除塵
装置の横断面図、第５図は第４図の実施例の変形例を模
式的に示す説明図である。 図中、11は濾筒、12は缶体、13は含塵ガス入口、14はヘ
ッダ、15は切出し弁、16はホッパ、17は管板、18は清浄
気体室、21、22、23、33は清浄気体導出ダクト、24、2
5、26、34はディフューザ、27、28、29、35は逆洗気体
導入管、30、31、32、36は逆洗気体吐出口である。FIG. 1 is a vertical sectional view showing a dust remover according to an embodiment of the present invention with a part cut away, FIG. 2 is a transverse sectional view taken along line II-II in FIG. 1, and FIG. 3 is an implementation of FIG. FIG. 4 is an explanatory view schematically showing a modified example of the example, FIG. 4 is a cross-sectional view of a dust remover according to another embodiment of the present invention, and FIG. 5 is an explanatory view schematically showing a modified example of the embodiment of FIG. It is a figure. In the figure, 11 is a filter cylinder, 12 is a can, 13 is a dust-containing gas inlet, 14 is a header, 15 is a cutoff valve, 16 is a hopper, 17 is a tube plate, 18 is a clean gas chamber, 21, 22, 23, 33 is a clean gas outlet duct, 24, 2
5, 26 and 34 are diffusers, 27, 28, 29 and 35 are backwash gas introduction pipes, and 30, 31, 32 and 36 are backwash gas discharge ports.
Claims (4)
る濾筒の内側に含塵気体を供給し、前記濾筒の外側から
清浄気体を取り出す除塵装置において、前記清浄気体側
の空間に逆洗気体吐出口を設け、前記逆洗気体の吐出方
向と前記濾筒の軸方向とが、実質的に平行となるよう
に、もしくは、実質的に同一平面上にないように、前記
逆洗気体吐出口を配置したことを特徴とする除塵装置。1. A dust remover for supplying a dust-containing gas to the inside of a filter cylinder made of a porous ceramic having air permeability and taking out a clean gas from the outside of the filter cylinder. The backwash gas discharge port is provided with a discharge port so that the discharge direction of the backwash gas and the axial direction of the filter cylinder are substantially parallel to each other or not substantially on the same plane. A dust removing device characterized in that
気体の吐出方向と前記濾筒の軸方向とが実質的に平行と
なるように前記逆洗気体吐出口を配置したことを特徴と
する除塵装置。2. The backwash gas discharge port according to claim 1, wherein the backwash gas discharge port is arranged such that a discharge direction of the backwash gas and an axial direction of the filter cylinder are substantially parallel to each other. And dust remover.
が挿通される管板によって前記清浄気体側の空間が複数
の小空間に区画され、各小空間に前記逆洗気体吐出口を
配置したことを特徴とする除塵装置。3. The clean gas side space is divided into a plurality of small spaces by a tube plate through which the filter cylinder is inserted, and the backwash gas discharge port is provided in each small space. A dust remover characterized by being placed.
て、前記逆洗気体の吐出方向が前記濾筒を収容する缶体
の内周壁に沿うように前記逆洗気体吐出口を配置したこ
とを特徴とする除塵装置。4. The backwash gas discharge port according to claim 1 or 3, wherein the backwash gas discharge direction is along the inner peripheral wall of the can body accommodating the filter cylinder. A dust removing device characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61244093A JPH0683768B2 (en) | 1986-10-16 | 1986-10-16 | Dust remover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61244093A JPH0683768B2 (en) | 1986-10-16 | 1986-10-16 | Dust remover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63100913A JPS63100913A (en) | 1988-05-06 |
| JPH0683768B2 true JPH0683768B2 (en) | 1994-10-26 |
Family
ID=17113639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61244093A Expired - Fee Related JPH0683768B2 (en) | 1986-10-16 | 1986-10-16 | Dust remover |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0683768B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5480465A (en) * | 1994-04-28 | 1996-01-02 | Air Equipment & Engineering, Inc. | Air/foreign material separator |
| JP2008099428A (en) * | 2006-10-11 | 2008-04-24 | Inaba Denki Sangyo Co Ltd | Apparatus and method for supporting fireproof filler |
-
1986
- 1986-10-16 JP JP61244093A patent/JPH0683768B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63100913A (en) | 1988-05-06 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |