JPS61291815A - Catalyst combustion device - Google Patents

Abstract

PURPOSE:To make a uniform distribution of temperature in a catalyst layer, provide a small-sized device and save energy by a method wherein an interior of a surge tank of a metallic case provided with some dispersion materials for dispersing reaction gas and catalyst is divided into a plurality of small chambers. CONSTITUTION:Interior of a surge tank of a metallic case 11 for a catalyst combustion device is divided by metallic plates 14 and the like to form some small chamber 15 which are divided for every specified surface area of the catalyst. Reaction gas is supplied into the metallic case 11 and then guided into the metallic case 11, further guided into the small chambers 15, passes through the dispersion materials 12 at the front surfaces of the small chambers and the catalysts 13 and contributes in the reaction. Therefore, it is possible to restrict the disturbance of distribution of temperature of the catalyst surfaces.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、工業用乾燥器、加熱炉、民生用暖房器などに
用いられる触媒燃焼装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a catalytic combustion device used in industrial dryers, heating furnaces, consumer heaters, and the like.

従来の技術 従来から、プロパン、ブタンなどの炭化水素類を触媒の
存在下で４００〜１６００℃の温度で触媒燃焼させ、反
応熱を熱源として得る触媒燃焼装置が提案されている。BACKGROUND OF THE INVENTION Conventionally, catalytic combustion devices have been proposed in which hydrocarbons such as propane and butane are catalytically combusted at a temperature of 400 to 1600° C. in the presence of a catalyst to obtain reaction heat as a heat source.

このような触媒反応装置には種々のものがあるが、第４
図に示すものは、全二次燃焼させる暖房器あるいは加熱
器の主要部において、金属ケース１の開放された前面部
分に、セラミックウール、アスベストなどから作られた
反応ガス拡散材２とその下流側に該反応ガス拡散材２と
同様の材料あるいはアルミナファイバマットなどを基材
とする触媒３が設けられている。反応ガスは金属ケース
１の流入口４を介してガス導入路のゴムホース５から供
給される。供給された反応ガスは金属ケース１の内部室
間で構成されるサージタンク６内に導かれ、反応ガス拡
散材２と触媒３を通って大気に放出される時に、大気中
の酸素と触媒存在下で接触し、酸化する。反応式は例え
ばプロパンの時は Ｃ３Ｈ６＋５０２→３ＣＯ２＋４Ｈ２０の反応が起り、
火炎を上げて高温で炎燃焼した時と同様の反応が低温で
行われる。反応熱は触媒層を暖め、輻射熱として放射さ
れ、空気を暖めるエネルギとして得られる。低温で燃焼
させる触媒燃焼では、輻射量が多く、かつ遠赤外領域の
波長の輻射が得られるので、塗料硬化、水分乾燥などに
有用であり、暖房としても効果的であるなどの効果をも
つ。従来の装置では、金属ケース１内に反応ガスを導入
する流入口の位置、サージタンク６内に別の配管を行い
、反応ガス噴射口を多く設ける等の方法が行われていた
。There are various types of such catalytic reaction devices, but the fourth
What is shown in the figure is a heater for all secondary combustion or the main part of a heater, in which a reactive gas diffusion material 2 made of ceramic wool, asbestos, etc. is placed on the open front part of a metal case 1 and the downstream side thereof. A catalyst 3 whose base material is the same material as the reactive gas diffusion material 2 or an alumina fiber mat is provided. The reaction gas is supplied through the inlet 4 of the metal case 1 from the rubber hose 5 of the gas introduction path. The supplied reaction gas is guided into the surge tank 6 formed between the internal chambers of the metal case 1, passes through the reaction gas diffusion material 2 and the catalyst 3, and is released into the atmosphere, where it is mixed with oxygen in the atmosphere and the presence of the catalyst. contact below and oxidize. For example, in the case of propane, the reaction formula is C3H6+502→3CO2+4H20,
The same reaction occurs at low temperatures as when a flame is raised and combustion occurs at high temperatures. The reaction heat warms the catalyst layer, is emitted as radiant heat, and is obtained as energy that warms the air. Catalytic combustion, which burns at low temperatures, produces a large amount of radiation and radiation with wavelengths in the far infrared region, making it useful for curing paints, drying moisture, etc., and is also effective as a heater. . In conventional apparatuses, methods have been used such as installing a separate pipe at the position of the inlet for introducing the reactive gas into the metal case 1 and inside the surge tank 6, and providing a large number of reactive gas injection ports.

発明が解決しようとする問題点 上記のような触媒燃焼装置は、その目的から輻射表面の
全面にわたり均一な輻射が得られること、すなわち、触
媒ａｍ度を均一にするために反応ガスを均一に表面に浸
出させることが重要であり、表面分布が均一であれば最
適条件で触媒を使用できるので、未反応率を低くできて
、最適燃焼が可能である。しかるに、従来の装置では反
応ガスの流入口などを種々工夫しても、触媒面温度分布
のバラツキが±４０℃程度となり、満足な特性、効果が
得られなかった。Problems to be Solved by the Invention The purpose of the above-mentioned catalytic combustion device is to obtain uniform radiation over the entire radiation surface. It is important that the catalyst is leached out, and if the surface distribution is uniform, the catalyst can be used under optimal conditions, so the unreacted rate can be lowered and optimal combustion can be achieved. However, in the conventional device, even if various improvements were made to the inlet of the reaction gas, etc., the variation in temperature distribution on the catalyst surface was about ±40° C., and satisfactory characteristics and effects could not be obtained.

本発明はこれらの問題点を解決するもので特性の優れた
、しかも安価な触媒燃焼装置を提供することを目的とす
るものである。The present invention solves these problems and aims to provide a catalytic combustion device with excellent characteristics and at low cost.

°問題点を解決するための手段 上記問題点を解決するために、本発明は、触媒燃焼装置
の金属ケース内で反応ガスを導入して滞留させる部分す
なわちサージタンク内を金属板などで仕切り、反応ガス
が放出される触媒側からみて区切られた状態を作り出し
たもので、金属ケースのサージタンク内は、触媒の一定
表面積毎に仕切られた小室が形成された構成になってい
る。°Means for Solving the Problems In order to solve the above problems, the present invention provides that the part where the reaction gas is introduced and retained in the metal case of the catalytic combustion device, that is, the inside of the surge tank, is partitioned off with a metal plate or the like. This creates a partitioned state when viewed from the catalyst side where the reaction gas is released, and the inside of the surge tank in the metal case has a structure in which small chambers are formed that are separated by a certain surface area of the catalyst.

作用 この構成により、反応ガスは金属ケース内に供給された
あと、これらの小室へ導かれて噴出され、小室前面の拡
散材と触媒を通って反応に関与する。Function: With this configuration, the reaction gas is supplied into the metal case, then guided into these small chambers and ejected, and participates in the reaction through the diffusion material and catalyst in front of the small chambers.

従って触媒面温度分布のバラツキは少なく、おさえられ
る。また、拡散材と仕切り板が対峙している拡散材部分
では反応ガスは少量互いに交叉するが、大きな影響はな
く、反応は金属ケース前面で極めて均質に行われる。Therefore, variations in the catalyst surface temperature distribution are small and can be suppressed. In addition, in the diffusion material portion where the diffusion material and the partition plate face each other, a small amount of the reaction gases cross each other, but this does not have a large effect and the reaction takes place extremely homogeneously on the front surface of the metal case.

実施例 以下本発明の一実施例を図面に基づいて説明する。第１
図は触媒面から見た一部切欠き正面図で、触媒および拡
散材は図示されていない。第２図は断面側面図である。EXAMPLE An example of the present invention will be described below based on the drawings. 1st
The figure is a partially cutaway front view seen from the catalyst surface, and the catalyst and diffusion material are not shown. FIG. 2 is a cross-sectional side view.

第１図および第２図において、１１は金属ケース、１２
、１３は第４図と同様の反応ガス拡散材および触媒であ
る。１４は金属ケース１１内のサージタンクを複数の小
室１５に区切る仕切板、１６は各小室１５への分岐され
た噴出口１７を有する導入管で、ゴムホース１８から供
給された反応ガスを各小室１５に設けられた噴出口１７
に導く。In FIGS. 1 and 2, 11 is a metal case, 12
, 13 are the same reactive gas diffusion material and catalyst as shown in FIG. 14 is a partition plate that divides the surge tank in the metal case 11 into a plurality of small chambers 15; 16 is an introduction pipe having a branched outlet 17 to each small chamber 15, and the reaction gas supplied from the rubber hose 18 is directed to each small chamber 15; spout 17 provided in
lead to.

本実施例における触媒放射面積は縦３００１、横６０α
とし、装置の厚みを９０麿とした。また拡散材１２には
１２Ｍの厚さのセラミックファイバを用い、触媒１３に
はシリカクロスに担体と白金を担持したクロス触媒を用
い、厚さを約２厘とした。仕切られた小室１５はＵ１５
Ｃ１１％横２０Ｃ！Ｉとし、計６室に分割した。The catalyst radiation area in this example is 3001 vertically and 60α horizontally.
The thickness of the device was set to 90 mm. Further, a ceramic fiber having a thickness of 12M was used as the diffusion material 12, and a cloth catalyst in which a carrier and platinum were supported on silica cloth was used as the catalyst 13, and the thickness was about 2 mm. The partitioned small room 15 is U15
C11% horizontal 20C! It was divided into six rooms in total.

反応ガス量、装置の設置位置、姿勢などを検討するため
、種々の大きさの小室を仕切板によって作製し、その効
果を検討した。また、触媒として、セラミックファイバ
にアルミナなどの担体を担持。In order to study the amount of reactant gas, installation position, and posture of the device, we created small chambers of various sizes using partition plates and examined their effects. Additionally, as a catalyst, a support such as alumina is supported on the ceramic fiber.

して貴金属（白金、パラジウム、ロジウム、ルテニウム
なと）や遷移金属酸化物を担持した触媒を使用した。A catalyst supporting noble metals (such as platinum, palladium, rhodium, and ruthenium) and transition metal oxides was used.

第３図は触媒放射面積を１８００ＣＩ＋１とした触媒燃
焼装置において、その仕切板を変えて放熱側からみた小
室の表面積を種々変え、かつ装置を垂直に立て、入力発
熱量を１．５ｋｃａｌ／ａｉ・Ｈおよび２．０ｋｃａｌ
／　ｃａｒ・ト１とし、触媒層温度を９点測定した温度
分布のバラツキ特性を示したものである。この結果では
、約４００ａｉまではほとんど温度分布に変化はないが
、それ以上では大きくなることが判る。Figure 3 shows a catalytic combustion device with a catalytic radiation area of 1800CI+1, in which the partition plate is changed to vary the surface area of the small chamber viewed from the heat radiation side, and the device is stood vertically, with an input calorific value of 1.5 kcal/ai. H and 2.0kcal
/car·to1, and shows the variation characteristics of the temperature distribution obtained by measuring the catalyst layer temperature at nine points. The results show that there is almost no change in the temperature distribution up to about 400ai, but it becomes larger above that.

また、拡散材は単−室の場合、厚さが４０Ｍ程度のもの
を使用しても、最大±５０℃程度の温度分布のバラツキ
があることを考えると、本実施例のものは、厚さが薄く
ても十分効果があることが分る。In addition, in the case of a single chamber, even if a diffusion material with a thickness of about 40M is used, there will be a variation in temperature distribution of about ±50℃ at the maximum. It turns out that even if it is thin, it is sufficiently effective.

乾燥などの面加熱体として用いると、温度分布は±３０
℃以下、好ましくは±２０℃以下であることが望ましく
、連続焼付処理を行うのに使用してほぼ均質な塗膜が得
られ、投入した反応ガスに対する未反応ガスの割合も１
％以下にできて、装置のエネルギ効率を高まることがで
きた。装置を水平にしたり斜めにしても、この結果と同
様の傾向を示すことから、温度分布を１２０℃以下にす
るためには、放熱側からみた小室の表面積を３００ａ！
以下とすると信頼性の高く、特性の優れた触媒燃焼装置
を提供できるものである。When used as a surface heating element for drying etc., the temperature distribution is ±30
℃ or less, preferably ±20℃ or less, it can be used for continuous baking to obtain a nearly homogeneous coating film, and the ratio of unreacted gas to the reactant gas introduced is 1.
% or less, increasing the energy efficiency of the device. Even if the device is placed horizontally or diagonally, the same tendency as this result is shown, so in order to keep the temperature distribution below 120°C, the surface area of the chamber viewed from the heat radiation side should be 300a!
When the following conditions are met, a highly reliable catalytic combustion device with excellent characteristics can be provided.

このように、触媒の材質、種類は、反応ガスの種類、入
力発熱量によって変えることができるものであり、また
拡散材は従来のものに比べて１／２以下の厚さにするこ
とができ、装置を小型化することができる。In this way, the material and type of catalyst can be changed depending on the type of reaction gas and the amount of heat input, and the thickness of the diffusion material can be reduced to less than half that of conventional ones. , the device can be made smaller.

発明の効果 以上本発明によれば、触媒層における温度分布をほとん
ど変化のないものに構成できるとともに、厚さを薄クシ
ても十分に効果が得られるものであり、装置の小型化、
低価格化、高性能化、省エネルギ化に役立ち、産業上の
ｌｉｉ値は極めて大きい。Effects of the Invention According to the present invention, the temperature distribution in the catalyst layer can be configured with almost no change, and sufficient effects can be obtained even when the thickness is thin, and the device can be made smaller and
It is useful for lowering prices, improving performance, and saving energy, and has an extremely large industrial lii value.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例を示す一部省略正面図、第２
図は断面図、第３図は温度分布特性図、。 第４図は従来例の断面図である。 １１・・・金属ケース、１２・・・拡散材、１３・・・
触媒、１４・・・仕切り板、１５・・・小室、１６・・
・導入管、１７・・・噴出口代理人　　　森　　本　　
義　　弘 第１図 第、３図 １ハつ令＃ｔｙＬ　（Ｑ−）） 第４図FIG. 1 is a partially omitted front view showing one embodiment of the present invention, and FIG.
The figure is a cross-sectional view, and Figure 3 is a temperature distribution characteristic diagram. FIG. 4 is a sectional view of a conventional example. 11... Metal case, 12... Diffusion material, 13...
Catalyst, 14... Partition plate, 15... Small chamber, 16...
・Introduction pipe, 17... Spout agent Morimoto
YoshihiroFigures 1, 3, 1, #tyL (Q-)) Figure 4

Claims (1)

【特許請求の範囲】[Claims] １、ブタン・プロパン等の炭化水素を触媒燃焼させる触
媒燃焼装置であつて、前面に反応ガスを拡散する拡散材
と触媒を設けた金属ケースのサージタンク内を区切って
複数の小室を形成し、前記小室のそれぞれに反応ガスの
噴出口を設けた触媒燃焼装置。1. A catalytic combustion device for catalytically combusting hydrocarbons such as butane and propane, which has a surge tank with a metal case equipped with a catalyst and a diffusion material for diffusing reactive gases on the front, which is divided into multiple small chambers. A catalytic combustion device in which each of the small chambers is provided with a reaction gas outlet.