JPS5813215B2 - catalytic reactor - Google Patents
catalytic reactorInfo
- Publication number
- JPS5813215B2 JPS5813215B2 JP55142451A JP14245180A JPS5813215B2 JP S5813215 B2 JPS5813215 B2 JP S5813215B2 JP 55142451 A JP55142451 A JP 55142451A JP 14245180 A JP14245180 A JP 14245180A JP S5813215 B2 JPS5813215 B2 JP S5813215B2
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- plate
- gas flow
- catalytic reactor
- shaped
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J15/00—Chemical processes in general for reacting gaseous media with non-particulate solids, e.g. sheet material; Apparatus specially adapted therefor
- B01J15/005—Chemical processes in general for reacting gaseous media with non-particulate solids, e.g. sheet material; Apparatus specially adapted therefor in the presence of catalytically active bodies, e.g. porous plates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Description
【発明の詳細な説明】
本発明は、触媒反応器に係り、特にガス中のダストによ
る摩耗に対して耐久性のすぐれた触媒反応器に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a catalytic reactor, and more particularly to a catalytic reactor that has excellent durability against wear caused by dust in gas.
従来、ダストの多いガスに対する排煙脱硝用触媒として
は、ダストによる触媒層の閉塞を防市するために、板状
またはハニカム状などのパラレルフロー型の触媒が用い
られている。BACKGROUND ART Conventionally, a parallel flow type catalyst such as a plate-shaped or honeycomb-shaped catalyst has been used as a catalyst for exhaust gas denitrification for gas containing a lot of dust in order to prevent clogging of the catalyst layer by dust.
これらの触媒は、一般に金属酸化物を主体とし、活性を
向上させるために多孔質に成形する場合が多く、強度的
に弱く、また耐摩耗性も不充分なものが多い。These catalysts generally consist mainly of metal oxides, are often formed into a porous structure to improve their activity, are weak in strength, and often have insufficient abrasion resistance.
従って石炭燃焼排ガスなど、触媒を摩耗しやすいダスト
を含むガスに対しては、触媒層でのガス流速をあまり大
きくすることができず、4〜6m/s程度が通例である
。Therefore, for gases containing dust that easily wears out the catalyst, such as coal combustion exhaust gas, the gas flow velocity in the catalyst layer cannot be increased very much, and is usually about 4 to 6 m/s.
しかしながら、触媒の使用条件として上記のようなガス
流速の制限が設けられることは、反応器の配置などに制
限を受け、結果的に複雑な配置となり、全体の製品コス
トが上昇する場合が多い。However, when the gas flow rate is restricted as described above as a condition for using the catalyst, restrictions are placed on the arrangement of the reactor, etc., resulting in a complicated arrangement, which often increases the overall product cost.
例えば、要求される脱硝率が低く、触媒量が少ない場合
、第1図のようにボイラ1のエコノマイザー2とエアヒ
ータ3の間に触媒反応器4を組み込むと、配置的に単純
となり有利であるが、反応器4の前後のダクト内ガス流
速が通例で10〜1 5m/sとなるため、反応器での
ガス流速も1 0 m/sに近い値となり、上記のガス
流速の制限条件を越える。For example, when the required denitrification rate is low and the amount of catalyst is small, it is advantageous to incorporate the catalytic reactor 4 between the economizer 2 and air heater 3 of the boiler 1 as shown in Fig. 1 because the arrangement is simple. However, since the gas flow velocity in the duct before and after the reactor 4 is usually 10 to 15 m/s, the gas flow velocity in the reactor is also close to 10 m/s, and the above gas flow rate limiting condition is satisfied. exceed.
従ってこのような場合、第2図のように、ダクトを長く
して反応器4を分離した配置にしなければならず、製造
コストが高くなるという欠点がある。Therefore, in such a case, as shown in FIG. 2, the duct must be lengthened and the reactor 4 must be placed in a separate arrangement, which has the disadvantage of increasing manufacturing costs.
本発明の目的は、上記した従来技術の欠点をなくし、ダ
ストを含むガスに対しても触媒が摩耗しにくく、高いガ
ス流速に耐える触媒反応器を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art described above, and to provide a catalytic reactor in which the catalyst is less likely to be worn out even by gas containing dust and can withstand high gas flow rates.
本発明は、板状触媒をガス流方向に対して若干傾斜させ
、触媒板面のガス上流側を向く面を金属等の耐摩耗物質
で、および下流側を向く面を触媒物質で構成したもので
ある。In the present invention, a plate-shaped catalyst is slightly inclined with respect to the gas flow direction, and the surface of the catalyst plate facing upstream of the gas is made of a wear-resistant material such as metal, and the surface facing downstream is made of a catalytic material. It is.
以下、本発明を図面に示す実施例によりさらに詳細に説
明する。Hereinafter, the present invention will be explained in more detail with reference to embodiments shown in the drawings.
第3図および第4図は、触媒反応器内に板状触媒を配置
した場合の触媒同士の位置関係を示す断面図および斜視
図である。FIG. 3 and FIG. 4 are a cross-sectional view and a perspective view showing the positional relationship between plate-shaped catalysts arranged in a catalytic reactor.
図において、触媒板5はガス流方向6に対して角度θだ
け頌斜し、適当な支持手段(図示せず)により反応器内
に固定されている。In the figure, the catalyst plate 5 is inclined at an angle θ to the gas flow direction 6 and is fixed in the reactor by suitable support means (not shown).
触媒板のガス上流側を向いた面7は金属等の耐摩耗物質
で構成され、また下流側に向いた面8は触媒物質で構成
されている。The surface 7 of the catalyst plate facing the gas upstream side is made of a wear-resistant material such as metal, and the surface 8 facing the downstream side is made of a catalytic material.
このような板状触媒は、例えば金属板等の耐摩耗物質の
表面を粗面化し、これに触媒物質を付着保持させること
により容易に製造することができる。Such a plate-shaped catalyst can be easily manufactured by, for example, roughening the surface of a wear-resistant material such as a metal plate and attaching and holding a catalyst material to the surface.
上記触媒板の傾斜角度θは、排ガス中のダスト濃度、ガ
ス流速等の条件にもよるが、5〜15度の範囲が好まし
い。The inclination angle θ of the catalyst plate is preferably in the range of 5 to 15 degrees, although it depends on conditions such as the dust concentration in the exhaust gas and the gas flow rate.
傾斜角度が大きすぎると圧損が増大し、一方、小さすぎ
ると本発明の目的とする触媒面の摩耗防止が不充分とな
る。If the inclination angle is too large, pressure loss will increase, while if it is too small, the prevention of wear on the catalyst surface, which is the object of the present invention, will be insufficient.
上記板伏触媒は、ガス流方向に交互に逆方向の頌斜面を
有するように複数段配置されるが、触媒のガス流方向の
長さ9が長すぎると、触媒板の間のガス流れが整流され
、触媒板の方向とダストの流れる方向が同一となるため
、触媒物質8も摩耗されるようになる。The above-mentioned plate-shaped catalyst is arranged in multiple stages so as to have slopes in opposite directions alternately in the gas flow direction. However, if the length 9 of the catalyst in the gas flow direction is too long, the gas flow between the catalyst plates will be rectified. Since the direction of the catalyst plate and the direction of dust flow are the same, the catalyst material 8 is also worn away.
従って触媒板の長さ9は整流されない程度の長さ(例え
ば100〜200mm)に調整される。Therefore, the length 9 of the catalyst plate is adjusted to a length (for example, 100 to 200 mm) that does not cause rectification.
上記のように触媒を配置することにより、ガスに同伴さ
れたダストは触媒5の耐摩耗物質の面7のみに衝突し、
触媒物質の面8は陰になるため、ダストの衝突は少なく
、従って触媒の摩耗を防正することができる。By arranging the catalyst as described above, the dust entrained in the gas collides only with the wear-resistant material surface 7 of the catalyst 5.
Since the surface 8 of the catalytic material is in the shade, there is less dust collision and therefore the abrasion of the catalyst can be prevented.
このため、例えは排ガス脱硝の場合、1 0m/s程度
の早いガス流速でも触媒を使用することができる。For this reason, for example, in the case of exhaust gas denitration, the catalyst can be used even at a high gas flow rate of about 10 m/s.
以上、本発明によれば、ガス流方向に対して板状触媒を
頌斜させて配置することにより、ガス中のダストによる
触媒の摩耗を軽減させることができる。As described above, according to the present invention, wear of the catalyst due to dust in the gas can be reduced by arranging the plate-shaped catalyst obliquely with respect to the gas flow direction.
このため、反応器内のガス流速を高めることができ、ま
たガス流速の制限がなくなるので装置を単純化すること
ができるなど、優れた効果が得られる。Therefore, the gas flow rate within the reactor can be increased, and since there is no restriction on the gas flow rate, the apparatus can be simplified, and other excellent effects can be obtained.
第1図および第2図は、それぞれボイラに接続された触
媒反応器の概略配置図、第3図および第4図はそれぞれ
本発明の触媒反応器内の板状触媒の配置状態の実施例を
示す断面図および斜視図である。
1・・・ボイラ、4一触媒反応器、5・・・板伏触媒、
7・・・耐摩耗物質(面)、8・・・触媒物質(面)。Figures 1 and 2 are schematic layout diagrams of a catalytic reactor connected to a boiler, and Figures 3 and 4 are examples of the arrangement of plate catalysts in the catalytic reactor of the present invention, respectively. FIG. 2 is a cross-sectional view and a perspective view. 1... Boiler, 4-catalytic reactor, 5... Itabuse catalyst,
7... Wear-resistant material (surface), 8... Catalyst material (surface).
Claims (1)
た触媒反応器において、板状触媒をガス流方向に対して
若干傾斜させ、触媒板面のガス上流側を向く面を耐摩耗
物質で、および下流側を向く面を触媒物質で構成したこ
とを特徴とする触媒反応器。 2 特許請求の範囲1において、前記板状触媒はガス流
方向に沿って交互に逆方向の頌斜面を有するように複数
段配列されていることを特徴とする触媒反応器。 3 特許請求の範囲1または2において、前記板状触媒
の頌斜角度が5〜15度である触媒反応器。[Claims] 1. In a catalytic reactor in which a plurality of plate-shaped catalysts are arranged parallel to the gas flow direction, the plate-shaped catalysts are slightly inclined with respect to the gas flow direction, and the gas upstream side of the catalyst plate surface is A catalytic reactor characterized in that the surface facing the downstream side is made of a wear-resistant material and the surface facing downstream is made of a catalytic material. 2. The catalytic reactor according to claim 1, wherein the plate-shaped catalysts are arranged in a plurality of stages so that the plate-shaped catalysts have dome slopes that alternate in opposite directions along the gas flow direction. 3. The catalytic reactor according to claim 1 or 2, wherein the plate-shaped catalyst has an oblique angle of 5 to 15 degrees.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55142451A JPS5813215B2 (en) | 1980-10-14 | 1980-10-14 | catalytic reactor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55142451A JPS5813215B2 (en) | 1980-10-14 | 1980-10-14 | catalytic reactor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5768132A JPS5768132A (en) | 1982-04-26 |
JPS5813215B2 true JPS5813215B2 (en) | 1983-03-12 |
Family
ID=15315609
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55142451A Expired JPS5813215B2 (en) | 1980-10-14 | 1980-10-14 | catalytic reactor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5813215B2 (en) |
-
1980
- 1980-10-14 JP JP55142451A patent/JPS5813215B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5768132A (en) | 1982-04-26 |
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