JPS6230805B2 - - Google Patents
Info
- Publication number
- JPS6230805B2 JPS6230805B2 JP58049176A JP4917683A JPS6230805B2 JP S6230805 B2 JPS6230805 B2 JP S6230805B2 JP 58049176 A JP58049176 A JP 58049176A JP 4917683 A JP4917683 A JP 4917683A JP S6230805 B2 JPS6230805 B2 JP S6230805B2
- Authority
- JP
- Japan
- Prior art keywords
- dust
- catalyst
- support rod
- exhaust gas
- piece
- 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
- 239000003054 catalyst Substances 0.000 claims description 20
- 239000000428 dust Substances 0.000 claims description 18
- 238000009825 accumulation Methods 0.000 claims description 8
- 230000002265 prevention Effects 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Description
【発明の詳細な説明】
この発明は脱硝装置において触媒上にダストが
堆積するのを防ぐ装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for preventing dust from accumulating on a catalyst in a denitrification device.
燃焼排ガスに含まれる窒素酸化物（以下NOx
と記す）は、そのまま大気に放出されると、光化
学スモツグをひき起すため、近年その処理対策に
大きな関心が寄せられている。従来からいくつか
のNOx除去方法が提案されているが、そのうち
NH3を還元剤として用いて脱硝触媒の存在下に
NOxを接触還元する方法は、処理ガスに酸素が
１容量％以上含まれていても、NH3がNOxと選択
的に反応するので、還元剤に関する費用の面で有
利な方法である。 Nitrogen oxides (hereinafter referred to as NOx) contained in combustion exhaust gas
) causes photochemical smog if released directly into the atmosphere, so there has been a great deal of interest in recent years in ways to deal with it. Several NOx removal methods have been proposed, but
In the presence of a denitrification catalyst using NH3 as a reducing agent
The method of catalytic reduction of NOx is an advantageous method in terms of cost regarding the reducing agent because NH 3 selectively reacts with NOx even if the process gas contains oxygen at 1% by volume or more.
石炭燃焼排ガスやごみ焼却排ガスに代表される
ように、燃焼排ガスは多かれ少なかれダストを含
む。そのために、上記NOxの接触還元法では、
ダストの通過性をよくするように、多数の独立通
路よりなる脱硝触媒が使われている。被処理排ガ
スのフローがダウン・フローの場合、上記独立通
路を有する触媒ブロツクの上端面上に、ダストが
堆積する。このダスト堆積の様子は、第２図に示
すとおりである。すなわち、触媒ブロツクの構成
単位１１の真上では、排ガスが流れないが、ダス
トは慣性の法則によつて構成単位１１の上面に至
る。そしてここでは風がないため、ダストが徐々
に堆積し、その凝結性によつて堆積ダスト１２が
生成し、排ガス流路を防ぐことがある。 Combustion exhaust gas, as typified by coal combustion exhaust gas and garbage incineration exhaust gas, contains dust to some extent. Therefore, in the NOx catalytic reduction method mentioned above,
A denitrification catalyst consisting of many independent passages is used to improve dust passage. When the flow of the exhaust gas to be treated is a down flow, dust is deposited on the upper end surface of the catalyst block having the independent passages. The appearance of this dust accumulation is as shown in FIG. That is, although no exhaust gas flows directly above the structural unit 11 of the catalyst block, dust reaches the upper surface of the structural unit 11 according to the law of inertia. Since there is no wind here, the dust gradually accumulates, and its coagulability creates deposited dust 12, which may block the exhaust gas flow path.
この発明は、上記のような知見に基づいてなさ
れたもので、ダストの堆積を効果的に防ぐ手段を
提供することを目的とする。 This invention was made based on the above findings, and an object thereof is to provide a means for effectively preventing dust accumulation.
この発明によるダストの堆積防止装置は、多数
の垂直独立通路を有する触媒ブロツクの上方に支
持棒が設けられ、支持棒に乱流生成用のたんざく
片が吊下げられているものである。 In the dust accumulation prevention device according to the present invention, a support rod is provided above a catalyst block having a large number of vertically independent passages, and a piece of debris for generating turbulent flow is suspended from the support rod.
たんざく片の材質としては、軽量でかつ耐食性
にすぐれたものが必要である。したがつて厚さ
0.1mm程度の鋼板ないしセラミツク板よりなるも
のが好ましい。たんざく片の形状としては平坦な
板状であるよりも、ねじれている方が好ましい。
たんざく片は、支持棒に対し略半回転しかつ揺動
するように、同棒にリングを介して吊され、また
上下に複数枚連ねられている。リングを通す孔の
径はリングの径より数倍大きくなされている。 The material for the piece needs to be lightweight and have excellent corrosion resistance. Therefore the thickness
Preferably, it is made of a steel plate or ceramic plate of about 0.1 mm. It is preferable that the shape of the sepal is twisted rather than a flat plate.
The tanzak pieces are suspended from the support rod via a ring so as to rotate approximately half a turn and swing relative to the support rod, and a plurality of pieces are arranged vertically. The diameter of the hole through which the ring passes is several times larger than the diameter of the ring.
以下、この発明を実施例により具体的に説明す
る。 Hereinafter, the present invention will be specifically explained with reference to Examples.
第１図において、脱硝装置の触媒充填部には、
多数の垂直独立通路１を有する触媒ブロツク２が
充填されている。触媒ブロツク２は平板状の触媒
構成単板３とジグザグ状の触媒構成単板４とが交
互に配され、これらが一体化されたものである。
触媒ブロツク２の上方には、同ブロツク２に沿つ
て水平に複数の支持棒５が設けられている。支持
棒５にはリング６を介して上下一対ずつのたんざ
く片７が吊下げられている。各たんざく片７は上
端部が下端部に対していずれも90゜ねじられたも
のである。 In Fig. 1, the catalyst filling part of the denitrification equipment is
A catalyst block 2 having a large number of vertical independent passages 1 is filled. The catalyst block 2 is made up of flat catalyst single plates 3 and zigzag catalyst single plates 4 arranged alternately and integrated.
Above the catalyst block 2, a plurality of support rods 5 are provided horizontally along the block 2. A pair of upper and lower tanzak pieces 7 are suspended from the support rod 5 via a ring 6. The upper end of each piece 7 is twisted at 90 degrees with respect to the lower end.
上記構成のダスト除去装置において、被処理排
ガスはダウン・フローであつて、温度200〜400℃
を有し、硫酸蒸気、塩酸ガスなどの腐食性ガスを
含む。触媒ブロツク２の上方では排ガスフローに
よつてたんざく片７が支持棒５に対して略半回転
しかつ揺動するため、排ガスフローは非定常の乱
流となる。その結果、ダストが触媒ブロツク２の
構成単板３，４の上に堆積するのが防がれる。 In the dust removal device with the above configuration, the exhaust gas to be treated is a down flow with a temperature of 200 to 400℃.
It contains corrosive gases such as sulfuric acid vapor and hydrochloric acid gas. Above the catalyst block 2, the exhaust gas flow causes the catalyst piece 7 to rotate approximately half a turn and swing relative to the support rod 5, so that the exhaust gas flow becomes an unsteady turbulent flow. As a result, dust is prevented from accumulating on the constituent veneers 3, 4 of the catalyst block 2.
以上のとおりで、この発明によるダストの堆積
防止装置は、触媒ブロツクの上方に設けられた支
持棒にたんざく片が吊下げられたものであるの
で、排ガスフローによつてたんざく片が支持棒に
対して略半回転しかつ揺動し、その結果触媒ブロ
ツクの上方では排ガスフローは非定常の乱流とな
る。したがつて触媒ブロツク上へのダストの堆積
が効果的に防止せられる。 As described above, the dust accumulation prevention device according to the present invention has a piece of protein suspended from a support rod provided above a catalyst block, so that the piece of dust is suspended from the support rod by the flow of exhaust gas. As a result, the exhaust gas flow becomes unsteady and turbulent above the catalyst block. The accumulation of dust on the catalyst block is therefore effectively prevented.
第１図はこの発明の実施例を示すダスト堆積防
止装置の斜視図、第２図はダストの堆積状態を示
す断面図である。
１……垂直独立通路、２……触媒ブロツク、５
……支持棒、６……リング、７……たんざく片。
FIG. 1 is a perspective view of a dust accumulation prevention device showing an embodiment of the present invention, and FIG. 2 is a sectional view showing the state of dust accumulation. 1...Vertical independent passage, 2...Catalyst block, 5
...Support rod, 6...Ring, 7...Rice piece.
Claims (1)
上方に支持棒が設けられ、支持棒に乱流生成用の
たんざく片が吊下げられている、脱硝装置におけ
るダストの堆積防止装置。1. A dust accumulation prevention device in a denitrification equipment, in which a support rod is provided above a catalyst block having a large number of vertically independent passages, and a piece of debris for generating turbulent flow is suspended from the support rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58049176A JPS59173118A (en) | 1983-03-23 | 1983-03-23 | Device for preventing deposition of dust on a denitration apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58049176A JPS59173118A (en) | 1983-03-23 | 1983-03-23 | Device for preventing deposition of dust on a denitration apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59173118A JPS59173118A (en) | 1984-10-01 |
| JPS6230805B2 true JPS6230805B2 (en) | 1987-07-04 |
Family
ID=12823740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58049176A Granted JPS59173118A (en) | 1983-03-23 | 1983-03-23 | Device for preventing deposition of dust on a denitration apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59173118A (en) |
-
1983
- 1983-03-23 JP JP58049176A patent/JPS59173118A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59173118A (en) | 1984-10-01 |
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