JPH0649134B2 - Exhaust gas treatment device - Google Patents
Exhaust gas treatment deviceInfo
- Publication number
- JPH0649134B2 JPH0649134B2 JP59230313A JP23031384A JPH0649134B2 JP H0649134 B2 JPH0649134 B2 JP H0649134B2 JP 59230313 A JP59230313 A JP 59230313A JP 23031384 A JP23031384 A JP 23031384A JP H0649134 B2 JPH0649134 B2 JP H0649134B2
- Authority
- JP
- Japan
- Prior art keywords
- filter medium
- exhaust gas
- layer
- present
- gas treatment
- 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 - Lifetime
Links
- 239000007789 gas Substances 0.000 claims description 24
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 21
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 10
- 239000000920 calcium hydroxide Substances 0.000 claims description 10
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 10
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 8
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 7
- 239000001110 calcium chloride Substances 0.000 claims description 7
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 8
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 8
- 239000000843 powder Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 3
- 229910052815 sulfur oxide Inorganic materials 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000005909 Kieselgur Substances 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000010451 perlite Substances 0.000 description 2
- 235000019362 perlite Nutrition 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- SHFGJEQAOUMGJM-UHFFFAOYSA-N dialuminum dipotassium disodium dioxosilane iron(3+) oxocalcium oxomagnesium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Na+].[Na+].[Al+3].[Al+3].[K+].[K+].[Fe+3].[Fe+3].O=[Mg].O=[Ca].O=[Si]=O SHFGJEQAOUMGJM-UHFFFAOYSA-N 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、排ガス処理装置に関し、特に都市ごみ焼却プ
ラント等から大量に排出される焼却飛灰，塩化水素，窒
素酸化物，硫黄酸化物を含むガスを効果的に処理する装
置に関する。TECHNICAL FIELD The present invention relates to an exhaust gas treatment apparatus, and particularly to incinerator fly ash, hydrogen chloride, nitrogen oxides, and sulfur oxides that are discharged in large quantities from municipal solid waste incineration plants and the like. The present invention relates to a device for effectively treating a gas containing the same.
本発明者らは、先に塩化水素除去を高める為に織布ろ布
に消石灰及び塩化カルシウムの固形物層を形成させる技
術を開発した。The present inventors have previously developed a technique for forming a solid layer of slaked lime and calcium chloride on a woven filter cloth in order to enhance the removal of hydrogen chloride.
ここで使用しているろ布は、グラスウール材であり、耐
熱性に劣るため、通気ガスの温度を２５０℃以下に維持
する必要がある。Since the filter cloth used here is a glass wool material and has poor heat resistance, it is necessary to maintain the temperature of the ventilation gas at 250 ° C. or lower.
耐熱性のあるろ過材料としては、炭素繊維の織布ろ材や
ステンレス鋼製の織りろ材等がある。Examples of heat-resistant filtering materials include woven carbon fiber filter media and woven stainless steel filter media.
上記炭素繊維の織布ろ材は摩擦に弱く、ステンレス鋼製
の織りろ材は価格が非常に高い等の難点がある。The above-mentioned carbon fiber woven filter medium is vulnerable to friction, and the stainless steel woven filter medium is very expensive.
また、本発明では、塩化水素除去機能の他に、窒素酸化
物除去（すなわち脱硝）機能をも併合させようとするも
のであるが、脱硝機能を維持する為の脱硝触媒を上記ス
テンレス鋼製織りろ材に保持させることは困難である。
すなわち、該ろ材表面に脱硝触媒をコーテイングするに
は、コーテイング材（脱硝触媒）とろ材表面が十分に濡
れることが必要であるが、ステンレス鋼製のろ材は濡れ
性が悪く、均一なコーテイング層を形成することが困難
である。Further, in the present invention, in addition to the function of removing hydrogen chloride, it is also intended to combine the function of removing nitrogen oxides (that is, denitration). However, the denitration catalyst for maintaining the denitration function is made of the above-mentioned stainless steel weave. It is difficult to hold it on the filter medium.
That is, in order to coat a denitration catalyst on the surface of the filter medium, it is necessary that the coating material (denitration catalyst) and the surface of the filter medium are sufficiently wet. Difficult to form.
本発明は、以上の問題点を解決し、ろ材の耐熱性を低コ
ストで向上させ、かつ塩化水素除去機能と窒素酸化物除
去機能を併せ持つ排ガス処理装置を提供しようとするも
のである。The present invention is intended to solve the above problems, to improve the heat resistance of a filter medium at low cost, and to provide an exhaust gas treatment device having both a hydrogen chloride removing function and a nitrogen oxide removing function.
本発明者らは、上記問題点を解決するために鋭意研究の
結果、ろ材として多孔質セラミツクを用いれば、耐熱性
が向上するのみならず、触媒との濡れ性にも優れ、更に
は集塵効果、逆洗空気によるろ材表面の清浄化効果をも
奏することができ、好適な排ガス処理装置を提供し得る
との知見を得て本発明を提案するに至つた。The inventors of the present invention have conducted extensive studies to solve the above problems, and when a porous ceramic is used as a filter medium, not only the heat resistance is improved, but also the wettability with a catalyst is excellent, and further dust collection is performed. The present invention has been proposed on the basis of the finding that the effect and the effect of cleaning the surface of the filter medium by the backwash air can be obtained and a suitable exhaust gas treatment device can be provided.
すなわち本発明は、ろ材として多孔質セラミツク材によ
る内筒・外筒の二重筒構造としたものを用い、少くとも
内筒ろ材表面に窒素酸化物除去用触媒層を設け、外筒ろ
材表面に特殊反応助剤プリコート層を介して消石灰又は
炭酸カルシウム及び塩化カルシウムを含む固形物層を形
成したことを特徴とする排ガス処理装置に関するもので
ある。That is, the present invention uses a double-cylinder structure of an inner cylinder and an outer cylinder made of a porous ceramic material as the filter medium, and at least a catalyst layer for removing nitrogen oxides is provided on the surface of the inner cylinder filter medium, and the outer cylinder filter medium surface is provided. The present invention relates to an exhaust gas treating apparatus, wherein a solid matter layer containing slaked lime or calcium carbonate and calcium chloride is formed via a special reaction aid precoat layer.
第１図は本発明装置の一実施態様例を示す概要図、第２
図は第１図の一部拡大概要図である。FIG. 1 is a schematic diagram showing an embodiment of the device of the present invention, FIG.
The figure is a partially enlarged schematic view of FIG.
第１，２図に示すように、本発明に係るろ材は、多孔質
セラミツク（例えば、ムライト，高純度アルミナ等）製
の外筒１と内筒２からなる２重円筒構造で、少なくとも
内筒ろ材表面（ここでは、内筒２のガス流入側と流出側
の２面及び外筒１のガス流出側の面）に脱硝触媒（例え
ば、五酸化バナジウムと酸化チタンの混合物）層５が、
例えばろ材表面の焼結作業を経て形成される。上記外筒
１のガス流入側には、ろ材の目詰を防ぐために特殊反応
助剤プリコート層５が設けられ、その上に消石灰又は炭
酸カルシウム（以下消石灰という）と塩化カルシウムを
含む固形物層４が形成される。なお、図中の矢印はガス
の流れ方向を示す。As shown in FIGS. 1 and 2, a filter medium according to the present invention has a double cylindrical structure composed of an outer cylinder 1 and an inner cylinder 2 made of a porous ceramic (for example, mullite, high-purity alumina, etc.), and at least the inner cylinder A denitration catalyst (for example, a mixture of vanadium pentoxide and titanium oxide) layer 5 is formed on the surface of the filter medium (here, the two surfaces of the inner cylinder 2 on the gas inflow side and the outflow side and the surface of the outer cylinder 1 on the gas outflow side).
For example, it is formed through a sintering operation on the surface of the filter medium. A special reaction aid precoat layer 5 is provided on the gas inflow side of the outer cylinder 1 to prevent clogging of the filter medium, and a solid layer 4 containing slaked lime or calcium carbonate (hereinafter referred to as slaked lime) and calcium chloride is provided thereon. Is formed. In addition, the arrow in a figure shows the flow direction of gas.
本発明における特殊反応助剤としては、かさ密度が小
さい、通気性がよい、吸気してもベトつかない、
１〜１００μ粒径、好ましくは１０〜５０μ粒径のもの
が適当で、例えば、ゼオライト，アルミナ，ケイソウ
土，パーライト，活性白土，カオリン，長石，石英等の
粉末の中から選ばれ、１種もしくは２種以上の混合粉末
として使用する。この粉体の中でも好適なものとしては
ゼオライト，ケイソウ土，パーライトがあげられる。As the special reaction aid in the present invention, the bulk density is small, the air permeability is good, it is not sticky even when inhaled,
Particles having a particle size of 1 to 100 μ, preferably 10 to 50 μ are suitable. For example, one selected from powders of zeolite, alumina, diatomaceous earth, perlite, activated clay, kaolin, feldspar, quartz, etc., or Used as a mixed powder of two or more kinds. Among these powders, zeolite, diatomaceous earth, and perlite are preferable.
第１，２図に示すような本発明装置は、例えば次のよう
な態様で構成される。The device of the present invention as shown in FIGS. 1 and 2 is configured in the following manner, for example.
先ず、排ガスダクト内に、脱硝触媒層５を形成したろ材
１，２を設置する（第３図中の１０）。First, the filter media 1 and 2 on which the denitration catalyst layer 5 is formed are installed in the exhaust gas duct (10 in FIG. 3).
次に、前記した特殊反応助剤を（第３図中の１１から）
導入し、プリコート層３を形成する。一方、消石灰を吹
込んだ排ガスを導入する。消石灰は排ガス中の塩化水素
と反応し、塩化カルシウムとなる。この塩化カルシウム
と未反応の消石灰とが外筒ろ材１表面に達し、固形物層
４を形成する。Next, the above-mentioned special reaction aid (from 11 in FIG. 3)
Then, the precoat layer 3 is formed. On the other hand, the exhaust gas blown with slaked lime is introduced. Slaked lime reacts with hydrogen chloride in the exhaust gas to form calcium chloride. This calcium chloride and unreacted slaked lime reach the surface of the outer cylinder filter medium 1 to form a solid layer 4.
上記した塩化カルシウムは潮解性を有し、排ガス中の水
分の凝縮等により粘着性の固体となるおそれがある。こ
のような状態になると、ろ材の孔を防いだり、粉体層の
圧密性を助長して装置の正常維持が困難になる。The above-mentioned calcium chloride has a deliquescent property and may become a sticky solid due to condensation of water in exhaust gas. In such a state, it becomes difficult to prevent the pores of the filter medium and promote the compaction of the powder layer, and it is difficult to maintain the apparatus normally.
斯る状況を防ぐために、本発明では、予め、ろ材表面に
上述の特殊反応助剤によるプリコート層３を形成するの
である。In order to prevent such a situation, in the present invention, the precoat layer 3 made of the above-mentioned special reaction aid is formed on the surface of the filter medium in advance.
その後、上述の消石灰が吹込まれた排ガスが通気され、
該ガス中の上記した固形物が、プリコート層３の上に固
形物層（粉体層）４を形成して行く。同時に、第３図に
示すように、上述のろ材１０に通じる排ガスダクト内に
供給装置１１から特殊反応助剤を常時噴射し、粉体層４
の圧密化を抑制する。After that, the exhaust gas blown with the above-mentioned slaked lime is aerated,
The above solid matter in the gas forms a solid matter layer (powder layer) 4 on the precoat layer 3. At the same time, as shown in FIG. 3, the special reaction aid is constantly injected from the supply device 11 into the exhaust gas duct leading to the above-mentioned filter medium 10, and the powder layer 4
Suppresses consolidation.
これらの層は、時間と共に成長し、その結果、装置の圧
力損失を上昇させる。そこで、ある一定時間間隔をおい
て粉体層を払い落とし、新たに層の形成を上述の態様で
行う。These layers grow over time, resulting in increased pressure drop in the device. Therefore, the powder layer is brushed off at a certain time interval, and a new layer is formed in the above-described mode.
以上の本発明装置において、排ガスが粉体層４を通過す
る際に、該排ガス中の未反応塩化水素が該粉体層４中の
消石灰と再度反応し、塩化水素が高効率で除去される。In the above-mentioned device of the present invention, when the exhaust gas passes through the powder layer 4, the unreacted hydrogen chloride in the exhaust gas reacts again with the slaked lime in the powder layer 4, and the hydrogen chloride is removed with high efficiency. .
また、この時、排ガス中のダクトも除去され、集塵効果
を得ることもできる。At this time, the duct in the exhaust gas is also removed, and the dust collecting effect can be obtained.
更に、特殊反応助剤としてアルカリ性のものを使用すれ
ば、排ガス中の硫黄酸化物を除去することができる。Furthermore, when an alkaline special reaction aid is used, sulfur oxides in the exhaust gas can be removed.
また、本発明装置においては、脱硝触媒層５が形成され
ており、予めアンモニアガスが注入された排ガスが該層
５に接触（通過）して窒素酸化物が除去される。Further, in the apparatus of the present invention, the denitration catalyst layer 5 is formed, and the exhaust gas into which ammonia gas has been injected in advance contacts (passes through) the layer 5 to remove nitrogen oxides.
本発明の装置によれば、次のような効果を奏することが
できる。According to the device of the present invention, the following effects can be obtained.
(1)塩化水素と窒素酸化物の双方を高効率で除去するこ
とができ、また集じん効率を高め、かつ硫黄酸化物をも
効果的に除去することができる。(1) Both hydrogen chloride and nitrogen oxides can be removed with high efficiency, dust collection efficiency can be improved, and sulfur oxides can also be effectively removed.
(2)排ガス温度が、従来の２５０℃以下に制限されず、
２５０℃以上の高温度でも処理できる。(2) Exhaust gas temperature is not limited to the conventional 250 ° C or lower,
It can be processed even at a high temperature of 250 ° C. or higher.
(3)ろ剤の汚れに対して、取りはずし、水洗いすること
により、繰返し使用ができる。(3) It can be used repeatedly by removing the dirt of the filter agent and washing it with water.
第１図は本発明装置に係るろ材の一実施態様例を示す
図、第２図は第１図の一部拡大図、第３図は本発明装置
の構成態様例を示す図である。FIG. 1 is a diagram showing an example of an embodiment of a filter medium according to the device of the present invention, FIG. 2 is a partially enlarged view of FIG. 1, and FIG. 3 is a diagram showing an example of the configuration of the device of the present invention.
Claims (1)
・外筒の二重筒構造としたものを用い、少くとも内筒ろ
材表面に窒素酸化物除去用触媒層を設け、外筒ろ材表面
に特殊反応助剤プリコート層を介して消石灰又は炭酸カ
ルシウム及び塩化カルシウムを含む固形物層を形成した
ことを特徴とする排ガス処理装置。1. A filter medium having a double cylinder structure of an inner cylinder and an outer cylinder made of a porous ceramic material is used, and a catalyst layer for removing nitrogen oxides is provided on the surface of the inner cylinder filter medium at least, and the outer cylinder filter medium surface is provided. An exhaust gas treatment apparatus, wherein a solid layer containing slaked lime or calcium carbonate and calcium chloride is formed through a special reaction aid precoat layer.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59230313A JPH0649134B2 (en) | 1984-11-02 | 1984-11-02 | Exhaust gas treatment device |
| EP86730067A EP0242488B1 (en) | 1984-11-02 | 1986-04-22 | Filter medium for treating an exhaust gas |
| US06/854,936 US4728503A (en) | 1984-11-02 | 1986-04-23 | Filter medium for treating an exhaust gas |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59230313A JPH0649134B2 (en) | 1984-11-02 | 1984-11-02 | Exhaust gas treatment device |
| EP86730067A EP0242488B1 (en) | 1984-11-02 | 1986-04-22 | Filter medium for treating an exhaust gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61111128A JPS61111128A (en) | 1986-05-29 |
| JPH0649134B2 true JPH0649134B2 (en) | 1994-06-29 |
Family
ID=26106495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59230313A Expired - Lifetime JPH0649134B2 (en) | 1984-11-02 | 1984-11-02 | Exhaust gas treatment device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0649134B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4807935B2 (en) * | 2001-12-29 | 2011-11-02 | ポール・コーポレーション | Filter element |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0655251B2 (en) * | 1985-05-20 | 1994-07-27 | 旭硝子株式会社 | Dust removal purifier |
| JPS6439819U (en) * | 1987-09-01 | 1989-03-09 |
-
1984
- 1984-11-02 JP JP59230313A patent/JPH0649134B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4807935B2 (en) * | 2001-12-29 | 2011-11-02 | ポール・コーポレーション | Filter element |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61111128A (en) | 1986-05-29 |
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