JPS6113846B2 - - Google Patents
Info
- Publication number
- JPS6113846B2 JPS6113846B2 JP4486679A JP4486679A JPS6113846B2 JP S6113846 B2 JPS6113846 B2 JP S6113846B2 JP 4486679 A JP4486679 A JP 4486679A JP 4486679 A JP4486679 A JP 4486679A JP S6113846 B2 JPS6113846 B2 JP S6113846B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- partition wall
- dust
- cylindrical body
- combustion
- 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
Links
- 238000002485 combustion reaction Methods 0.000 claims description 31
- 239000011148 porous material Substances 0.000 claims description 25
- 239000000428 dust Substances 0.000 claims description 23
- 239000000919 ceramic Substances 0.000 claims description 17
- 238000005192 partition Methods 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 10
- 239000004071 soot Substances 0.000 claims description 10
- 230000035699 permeability Effects 0.000 claims description 3
- 239000000126 substance Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- GEIAQOFPUVMAGM-UHFFFAOYSA-N ZrO Inorganic materials [Zr]=O GEIAQOFPUVMAGM-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
【発明の詳細な説明】
本発明は各種燃焼装置より排出される高温燃焼
排ガス中に含まれる煤塵等を捕集除去し、燃焼排
ガスを浄化する高温用セラミツクフイルターに関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-temperature ceramic filter that collects and removes soot and dust contained in high-temperature combustion exhaust gas discharged from various combustion devices and purifies the combustion exhaust gas.
火力発電所や各種工場等のボイラー、燃焼炉あ
るいは焼却炉等から排出される燃焼排ガス中に
は、可燃物質としての煤塵や不燃物質としてのフ
ライアツシユ等の塵埃が多く含まれている。これ
らの物質はいずれも大気汚染防止上除去する必要
がありこの処理としては前記可燃物質の再燃焼処
理とその後工程における除塵処理が一般的であ
る。 BACKGROUND OF THE INVENTION Combustion exhaust gas discharged from boilers, combustion furnaces, incinerators, etc. of thermal power plants and various factories contains a large amount of dust such as soot as a combustible material and fly ash as a non-combustible material. All of these substances need to be removed in order to prevent air pollution, and this treatment generally includes re-combustion treatment of the combustible substances and dust removal treatment in the subsequent process.
すなわち従来これら燃焼排ガスの浄化処理とし
ては燃焼排ガスを一旦燃焼炉内に設置した２次燃
焼室か又は、燃焼炉とは別に設けた再燃焼炉に導
き、燃焼排ガス中に含まれる可燃性物質を再燃焼
させ、その後その燃焼排ガスを除塵装置に導いて
除塵するものである。この燃焼排ガスの除塵法と
しては、湿式法と乾式法とが知られているが、湿
式法は大型の湿式集塵機のほかに水処理装置やミ
スト分離器を附設しなければならない等除塵設備
が大型かつ複雑化し、さらに運転保守が面倒であ
る等の欠点があるものであり、また乾式法は、主
に電気集塵機やバツグフイルターを使用するもの
であるので500℃〜900℃程度の高温の燃焼排ガス
をそのまま使用することは勿論できないので、大
量に排出される高温燃焼排ガスを100℃〜300℃程
度まで冷却することが必要であり、そのために大
型の冷却装置を必要とするため除塵設備が大型か
つ複雑となり高価となる等の欠点のあるものであ
つた。 In other words, the conventional purification treatment for combustion exhaust gas is to introduce the combustion exhaust gas into a secondary combustion chamber installed inside the combustion furnace or into a re-combustion furnace installed separately from the combustion furnace to remove combustible substances contained in the combustion exhaust gas. The combustion exhaust gas is re-combusted and then guided to a dust remover to remove dust. Wet methods and dry methods are known as dust removal methods for this combustion exhaust gas, but the wet method requires large dust removal equipment such as a large wet dust collector as well as a water treatment device and a mist separator. Moreover, the dry method has disadvantages such as being complicated and requiring troublesome operation and maintenance.Also, the dry method mainly uses electrostatic precipitators and bag filters, so it generates high-temperature combustion exhaust gas of about 500℃ to 900℃. Of course, it is not possible to use it as is, so it is necessary to cool the high-temperature combustion exhaust gas that is emitted in large quantities to about 100℃ to 300℃, which requires a large cooling device, which requires large and large dust removal equipment. It had drawbacks such as being complicated and expensive.
本発明の高温用セラミツクフイルターは、従来
のこれらの欠点を解決するためになされたもので
あり、高温燃焼排ガスを冷却することなく直接に
使用して燃焼排ガス中に含まれる煤塵類を効率的
に捕集除去するとともに、燃焼排ガス中に含まれ
る可燃性物質の燃焼を促進するものであり、耐火
性粒子の集合体よりなる通気性を有する多孔質の
有底筒状体で、その有底筒状体の開口端近傍の隔
壁が他の部分の隔壁より厚い環状肉厚部を有する
形状であつて、その有底筒状体の平均細孔径が20
〜150μでかつ細孔容積が0.10c.c.／ｇ〜0.50c.c.／
ｇである燃焼排ガス中の煤塵を除去する高温用セ
ラミツクフイルターである。 The high-temperature ceramic filter of the present invention has been developed to solve these conventional drawbacks, and can efficiently remove soot and dust contained in the combustion exhaust gas by directly using the high-temperature combustion exhaust gas without cooling it. It collects and removes combustible substances contained in combustion exhaust gas, and promotes the combustion of combustible substances contained in combustion exhaust gas. The cylindrical body has a shape in which the partition wall near the open end has an annular thick part that is thicker than the partition wall in other parts, and the average pore diameter of the bottomed cylindrical body is 20.
～150μ and pore volume 0.10cc/g～0.50cc/
This is a high-temperature ceramic filter that removes soot and dust from combustion exhaust gas.
本発明の更に詳しい構成を一具体例を示す第１
図に基づいて説明すれば、珪砂、陶磁器紛砕物、
Al2O3、TiO2、ZrO2等の金属酸化物、炭化珪素、
窒化物、硼化物あるいはその他の耐火性材料等よ
りなる所定粒度に整粒された耐火性粒子２が、水
ガラス、フリツト、釉薬等の耐火性結合材で通気
性を有する多孔質の有底筒状体１に形成され、内
外面に連通した多数の細孔を有するものであつ
て、その有底筒状体１の開口端３近傍の隔壁４ａ
が他の部分の隔壁４ｂよりも肉厚が厚い環状肉厚
部５を形成する形状よりなるものである。 A first example showing a more detailed configuration of the present invention
To explain based on the diagram, silica sand, crushed ceramics,
Metal oxides such as Al 2 O 3 , TiO 2 , ZrO 2 , silicon carbide,
Refractory particles 2 made of nitride, boride, or other refractory materials and sized to a predetermined particle size are made of a porous bottomed cylinder with air permeability using a refractory binder such as water glass, frit, or glaze. A partition wall 4a near the open end 3 of the bottomed cylindrical body 1, which is formed in the cylindrical body 1 and has a large number of pores communicating with the inner and outer surfaces.
The partition wall 4b is shaped so as to form an annular thick portion 5 which is thicker than the partition wall 4b in other portions.
そしてさらに、有底筒状体１の平均細孔径が20
〜150μ、好ましくは30μ〜60μでかつ細孔容積
が0.10c.c.／ｇ〜0.50c.c.／ｇ、好ましくは0.15c.c.／
ｇ〜0.25c.c.／ｇであるセラミツクフイルターであ
る。 Furthermore, the average pore diameter of the bottomed cylindrical body 1 is 20
~150μ, preferably 30μ to 60μ, and a pore volume of 0.10cc/g to 0.50cc/g, preferably 0.15cc/g
It is a ceramic filter with a weight of 0.25 cc/g.
すなわち本発明は、フイルターが特定形状を有
するとともにそのフイルターの平均細孔径および
細孔容積が、ある特定の範囲内にあることによる
相乗効果により排ガス中の煤塵類の捕集除去に極
めて優れたフイルターを初めて見出したものであ
る。 That is, the present invention provides a filter that is extremely excellent in collecting and removing particulate matter from exhaust gas due to the synergistic effect of the filter having a specific shape and the average pore diameter and pore volume of the filter being within a specific range. This is the first time I have discovered this.
従つて本発明においては平均細孔径および細孔
容積が所定数値限定範囲内にあることが最も大切
である。そして、この平均細孔径および細孔容積
を所定の数値限定範囲内に調整するには、耐火性
粒子の粒径、耐火性結合体の添加量および成形条
件等を選定することにより任意に選択できるので
ある。 Therefore, in the present invention, it is most important that the average pore diameter and pore volume are within a predetermined numerically limited range. In order to adjust the average pore diameter and pore volume within a predetermined numerically limited range, they can be arbitrarily selected by selecting the particle diameter of the refractory particles, the amount of the refractory binder added, the molding conditions, etc. It is.
なお平均細孔径が20μ未満である場合は、排ガ
ス中のダストにより目詰まり現象を起しやすく捕
集効率が低下するので好ましくなく、また平均細
孔径が150μを越えると排ガスのいわゆる吹抜け
現象が発生しかえつて捕集効率が低下するので好
ましくないものである。 If the average pore diameter is less than 20μ, it is undesirable because the dust in the exhaust gas tends to cause clogging, reducing the collection efficiency, and if the average pore diameter exceeds 150μ, the so-called blow-by phenomenon of exhaust gas occurs. However, this is undesirable because the collection efficiency decreases.
さらに、細孔容積が0.10c.c.／ｇ未満であると、
全体が緻密になり過ぎ機械的強度は増加するが通
気抵抗も急速に増大し実用的なフイルターは得ら
れないものであり、細孔容積が0.50c.c.／ｇを越え
ると機械的強度の低下および捕集効率の低下が著
しく特に、排ガスのいわゆる吹抜け現象の発生に
より捕集効率の急激な低下が認められ好ましくな
いものである。 Furthermore, when the pore volume is less than 0.10cc/g,
If the pore volume exceeds 0.50 cc/g, the mechanical strength will decrease and the filter will not be able to be used. This is undesirable because the collection efficiency is markedly lowered, and in particular, a rapid drop in collection efficiency is observed due to the occurrence of so-called blow-by phenomenon of exhaust gas.
なお、閉鎖端部を含むセラミツクフイルター筒
状部の隔壁４ｂの肉厚は５mm以上あれば良いが、
細孔径との関係より10mm〜20mm程度が通気抵抗お
よび捕集効率の点より好ましい。さらに耐火性粒
子としては前述のような耐火材料よりなる粒子で
あれば十分であるが排ガス温度が高くなるほど、
あるいは排ガス中の有害ガス成分が多くなるほど
熱的、化学的に安定したものを使用する必要があ
り、そのような場合にはアルミナ、炭化珪素、窒
化物、硼化物等の粒子が特に良いものであり、ま
た当然のことながら結合材も熱的、化学的により
安定したものを使用した方が良いものである。 Note that the wall thickness of the partition wall 4b of the ceramic filter cylindrical portion including the closed end portion may be 5 mm or more;
In view of the relationship with the pore diameter, a range of about 10 mm to 20 mm is preferable in terms of ventilation resistance and collection efficiency. Furthermore, as the refractory particles, particles made of the above-mentioned refractory material are sufficient, but the higher the exhaust gas temperature, the more
Alternatively, as the amount of harmful gas components in the exhaust gas increases, it is necessary to use a material that is thermally and chemically stable, and in such cases, particles such as alumina, silicon carbide, nitride, and boride are particularly good. Naturally, it is better to use a binder that is more thermally and chemically stable.
本発明の高温用セラミツクフイルターは、以上
のような構成よりなるものであり使用に際しては
環状肉厚部５を保持して、排ガス中に懸架し各種
燃焼装置より排出される高温の燃焼排ガスをセラ
ミツクフイルターの外部より内筒部方向に隔壁４
ｂの細孔中を通過させることによつて、燃焼排ガ
ス中に含まれる煤塵等はセラミツクフイルターの
外表面で捕集除去され、さらに微細な紛塵は細孔
内を通過する過程で捕集除去される。そして未燃
炭素やタール等の可燃性物質が煤塵中に含まれる
場合、その可燃性物質は高温状態のセラミツクフ
イルター表面上で燃焼されるものであり、本発明
のセラミツクフイルターは除塵と燃焼床とを兼ね
備える効果のあるものである。 The high-temperature ceramic filter of the present invention has the above-mentioned configuration, and when in use, the thick annular portion 5 is held and suspended in exhaust gas, and the ceramic filter filters high-temperature combustion exhaust gas discharged from various combustion devices. A partition wall 4 extends from the outside of the filter toward the inner cylinder part.
By passing through the pores of b, the soot and dust contained in the combustion exhaust gas is collected and removed on the outer surface of the ceramic filter, and even finer dust is collected and removed during the process of passing through the pores. be done. When combustible substances such as unburned carbon and tar are included in the soot and dust, the combustible substances are burned on the surface of the ceramic filter in a high temperature state. It is effective in combining the following.
以上述べたとおり本発明の高温用セラミツクフ
イルターは、耐火性粒子の集合体よりなる通気性
を有する多孔質の有底筒状体で、その有底筒状体
の開口端近傍の隔壁が他の部分の隔壁より厚い環
状肉厚部を有する高温用セラミツクフイルターで
あつて、筒状部の隔壁の肉厚が５〜20mmであり、
その有底筒状体の平均細孔径が20μ〜150μで、
かつ細孔容積が0.10c.c.／ｇ〜0.50c.c.／ｇであるこ
とにより燃焼排ガス中の煤塵の捕集除去効率の向
上が顕著に期待できると共に、500℃〜900℃とい
う高温の燃焼排ガスに直接使用することができる
ので、未燃分を完全に燃焼させる効果があるもの
であり、従つて本発明のフイルターを用いた除塵
装置は従来のように冷却装置を全く必要としない
ため除塵設備が簡単かつ小型ですむものであり、
さらに後処理等を必要としないものであり、しか
も所定数値限定範囲内の平均細孔径および細孔容
積を有することにより燃焼排ガス中の煤塵の捕集
除去に最も適した細孔構造を有するものであつ
て、捕集効率に極めて優れたフイルターである。
また、炭素やタール等の可燃性物質が煤塵中に含
まれる場合、その可燃性物質は高温状態のセラミ
ツクフイルター表面上で燃焼されることによつて
その除塵効果の向上が期待されるものであり、本
発明のセラミツクフイルターは除塵と燃焼床とを
兼ね具える効果のある等数多くの利点を有するも
のであるので、大気汚染の防止に役立つものであ
つて公害防止上極めて有用なフイルターである。 As described above, the high-temperature ceramic filter of the present invention is a porous bottomed cylindrical body made of an aggregate of refractory particles and has an air permeability, and the partition wall near the open end of the bottomed cylindrical body is A high-temperature ceramic filter having an annular thick part that is thicker than the partition wall of the cylindrical part, the partition wall of the cylindrical part having a wall thickness of 5 to 20 mm,
The average pore diameter of the bottomed cylindrical body is 20μ to 150μ,
In addition, since the pore volume is 0.10cc/g to 0.50cc/g, it can be expected to significantly improve the efficiency of collecting and removing soot and dust in combustion exhaust gas, and it can be used directly for combustion exhaust gas at a high temperature of 500℃ to 900℃. Therefore, the dust removal device using the filter of the present invention does not require a cooling device at all unlike conventional ones, so the dust removal equipment is simple and simple. It can be small,
Furthermore, it does not require post-treatment, and has a pore structure most suitable for collecting and removing soot and dust in combustion exhaust gas by having an average pore diameter and pore volume within a predetermined numerical limit range. It is a filter with extremely high collection efficiency.
In addition, when flammable substances such as carbon and tar are included in the soot and dust, it is expected that the dust removal effect will be improved by burning the flammable substances on the surface of the ceramic filter in a high temperature state. The ceramic filter of the present invention has many advantages such as being able to function as both a dust remover and a combustion bed, so it is useful for preventing air pollution and is an extremely useful filter for pollution prevention.
第１図は本発明の高温用セラミツクフイルター
の一具体例を示す縦断面説明図である。
１……有底筒状体、２……耐火性粒子、３……
開口端、４ａ……開口端近傍の隔壁、４ｂ……隔
壁、５……環状肉厚部。
FIG. 1 is an explanatory longitudinal cross-sectional view showing a specific example of the high temperature ceramic filter of the present invention. 1... Bottomed cylindrical body, 2... Fire-resistant particles, 3...
Opening end, 4a... partition wall near the opening end, 4b... partition wall, 5... annular thick part.
Claims (1)
多孔質の有底筒状体で、その有底筒状体の開口端
近傍の隔壁が他の部分の隔壁より厚い環状肉厚部
を有する燃焼排ガス中の煤塵を除去する高温用セ
ラミツクフイルターにおいて、その有底筒状体の
平均細孔径が20μ〜150μで、かつ細孔容積が
0.10c.c.／ｇ〜0.50c.c.／ｇであるとともに、筒状部
の隔壁の肉厚が５〜20mmであることを特徴とする
高温用セラミツクフイルター。1 Combustion in which a porous bottomed cylindrical body made of an aggregate of refractory particles has an air permeability, and the partition wall near the open end of the bottomed cylindrical body has an annular thick part that is thicker than the partition walls in other parts. In high-temperature ceramic filters that remove soot and dust from exhaust gas, the average pore diameter of the bottomed cylindrical body is 20μ to 150μ, and the pore volume is
A ceramic filter for high temperature use, characterized in that the thickness of the partition wall of the cylindrical part is 0.10 cc/g to 0.50 cc/g, and the wall thickness of the partition wall of the cylindrical part is 5 to 20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4486679A JPS55137022A (en) | 1979-04-14 | 1979-04-14 | High temperature use ceramic filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4486679A JPS55137022A (en) | 1979-04-14 | 1979-04-14 | High temperature use ceramic filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55137022A JPS55137022A (en) | 1980-10-25 |
| JPS6113846B2 true JPS6113846B2 (en) | 1986-04-16 |
Family
ID=12703409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4486679A Granted JPS55137022A (en) | 1979-04-14 | 1979-04-14 | High temperature use ceramic filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55137022A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002062726A1 (en) | 2001-02-02 | 2002-08-15 | Ngk Insulators,Ltd. | Honeycomb structure and method for preparation thereof |
| US7011803B2 (en) | 2000-04-14 | 2006-03-14 | Ngk Insulators, Ltd. | Honeycomb structure and method for its manufacture |
| WO2009069731A1 (en) | 2007-11-30 | 2009-06-04 | Ngk Insulators, Ltd. | Silicon carbide porous body |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4615283A (en) * | 1984-09-26 | 1986-10-07 | Westinghouse Electric Corp. | Apparatus and method for disposal of hazardous waste material |
| DE8715130U1 (en) * | 1987-11-13 | 1988-01-28 | Foseco International Ltd., Birmingham, Gb | |
| JP2578176B2 (en) * | 1988-08-12 | 1997-02-05 | 日本碍子株式会社 | Porous ceramic honeycomb filter and method for producing the same |
-
1979
- 1979-04-14 JP JP4486679A patent/JPS55137022A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7011803B2 (en) | 2000-04-14 | 2006-03-14 | Ngk Insulators, Ltd. | Honeycomb structure and method for its manufacture |
| WO2002062726A1 (en) | 2001-02-02 | 2002-08-15 | Ngk Insulators,Ltd. | Honeycomb structure and method for preparation thereof |
| US6764742B2 (en) | 2001-02-02 | 2004-07-20 | Ngk Insulators, Ltd. | Honeycomb structure body and production method thereof |
| WO2009069731A1 (en) | 2007-11-30 | 2009-06-04 | Ngk Insulators, Ltd. | Silicon carbide porous body |
| US8449644B2 (en) | 2007-11-30 | 2013-05-28 | Ngk Insulators, Ltd. | Silicon carbide porous body |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55137022A (en) | 1980-10-25 |
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