200840979 九、發明說明： « 【發明所屬之技術領域】 其本Γ月係有關一種輻射管燃燒器，具體而言，該輻射 言燃燒裔係在導引姆$圭用办> > 宁兀用二虱之輻射管的内部設有供泠辦- 料氣體之姆料氧I#供认总 ^ ' 人、、、抖轧組I、給官，於該燃料氣體供給管的 Γ=;繼進方向喷出之直進喷出口，並且於該燃 ;:::Γ前端側設有使從上述直進嘴出口喷出的燃 科乳脰/、燃燒用空氣混合並燃燒之燃燒筒。 本發明的特徵在於，在上诚的* 隹上述的幸田射官燃燒器中，能夠 猎由間早的構成來大幅減低燃燒排放氣體_的抓的量， ^且抑制上述燃燒筒因溫度上升造成壽命降低的情形。其 ’上述燃燒排放氣體中白令Ν0χ若未特別預先說明，則意 曰包括燃料氣體中的氮部分㈤因氧化而產生之N0x(Fuei _,，燃^生成氮氧化物）、與燃料氣體中所含的氮㈤與 乳⑽在高溫狀態下反應而產生的N〇x(Thermai恥“熱： 成氮氧化物）兩者。 μ 本申請案係基於日本特願2007-67850號申請案，並在 此引用其内容。 【先前技術】 、 直以來有各式各樣種類的輻射管燃燒器被使用著， ^年來則基於環境保護的觀點而有W究在利用帛射管燃燒 為燃燒燃料氣體時，減少燃燒後的燃燒排放氣體中所含有 的NOx的量之方法。 而為了減少燃燒排放氣體中所含有的N〇x的量，在習 319946 6 200840979 知技術中，專利文獻之日本特開昭63-1 1 601 1號公報及日 ^ 本特開平11-201417號公報已揭示有一種輻射管燃燒器， 其係於輻射管内設有供給燃燒用空氣的燃燒用空氣供給 * 管，並且於該燃燒用空氣供給管的内部設有供給燃料氣體 的燃料氣體供給管。 此處，在該輻射管燃燒器中，係使經由燃燒用空氣供 給管内而供給之一次燃燒用空氣與經由上述燃料氣體供給 管而供給之燃料氣體於燃料氣體過剩的狀態下在燃燒筒内 " 混合並不完全燃燒後，再使經由上述燃燒用空氣供給管的 外侧而供給之二次燃燒用空氣混合並使之完全燃燒。剛如 上述使之以2階段來燃燒，便抑制火焰溫度的升高而減低 燃燒排放氣體中的ΝΟχ的量。 然而，當如此於輻射管内另外設置供給燃燒用空氣的 燃燒用空氣供給管時，製造成本升高，並且因利用更多階 段來進行燃燒而變得非常難以使排放氣體中的ΝΟχ的量更 U加減低之問題。 此外，在習知技術中，專利文獻之曰本特開平6 -257737號公報及日本特開2000-1461 18號公報係已揭示有 一種輻射管燃燒器，其係於供給燃料氣體之燃料氣體供給 管的前端侧設有燃燒筒，使該燃燒筒的前端部收縮成錐狀 並且於該燃燒筒設有複數個孔。 而在該輻射管燃燒器中，係使經由輻射管内而供給燃 燒筒内之一次燃燒用空氣與經由上述燃料氣體供給管而供 給之燃料氣體於燃料氣體過剩的狀態下在該燃燒筒内混 7 319946 200840979 合，將經如上述混合的氣體的一部分導引至該燃燒筒被收 縮成錐狀的前端部並使之燃燒，另一方面，將未導引至上 述被收縮成錐狀的前端部之剩餘氣體經由上述的孔而導引 至燃燒筒的外周侧，且使與被導引至該燃燒筒的外周侧之 二次燃燒用空氣混合並燃燒。 —然而，如上述的輻射管燃燒器般使燃燒筒的前端部收 縮成錐狀並且於該燃燒筒設置複數個孔之作業係麻須費事 且有=燒筒製造成本升高之問題。此外，亦有當如上述將 未被導引至前端部之剩餘氣體導引至燃燒筒的外周側而使 之與一次燃燒用空氣混合並燃燒時，燃燒 上升而使燃燒筒的壽命變短之問題。 〜大巾田 【發明内容】 (鲞明所欲解決之課題） 問題本《㈣課7^在於解決習知輻射管燃燒器的上述各種 亦p本發明的課題在於能夠藉由汽星的搂士、十 減低錢的Ν。γ 丨:，㈣構成來大幅 上升造成壽命降低的情了:的里’亚且抑制燃燒筒因溫度 € %決課題的手段） 導引燃燒用二々課蟪，本發明的輻射管燃燒器係在 氣體供給管二2管的内部設有供給燃料氣體之燃料 往直線前進方向喷出之直口，有使燃料氣體 給管的前端侧設有使 、’亚且於該燃料氣體供 义直進贺出口噴出的燃料氣體與 319946 8 200840979 燃燒用空氣混合並燃燒之燃燒筒者，其特徵在於··在位於 上述直進喷出口之後方的燃料氣體供給管的前端部有 使燃料氣體往放射方向喷出的放射喷出口 ’且在位^放 射喷出口的後方附近之燃料氣體供給管的外周設置有抑止 板，並且在位於該抑止板之更後方的位置的燃料氣體p 管設置有使燃料氣體往放射方向喷出的一次喷出口。 此處，在上述的幸昌射營鐵掉哭、士 要认t 吕队裔中’在使燃料氣體從設 料氣體供給管的上述一次嘴出口往放射方向喷出 導=二ΓΓ 一次喷出口喷出之燃料氣體適當地燃燒再 =至爐内’較宜使從該—次噴出口往放射方向喷出之取 料氣體朝前方傾斜噴出。、 … 此外，為了使燃燒排放氣體中的紙的量 防止燃燒筒的溫度大幅上升，較宜將從該一次嗔出口嗔出 2燃料氣體的量設定為全部燃料氣體的…崎的範 喷出：：土：的輕射管燃燒器中，為了使從上述放射 邻始人贺出口喷出之燃料氣體的燃燒在輻射管的内 ^勾^丁’較宜於燃料氣體供給管分別設有複數個放射 次喷出口，並且放射喷出口與-次喷出口在圓 周方向的位置相異。 Μ 〜卜在本發明的輻射管燃燒器中，由於不需要如習 至燃：燃燒筒内混合的燃料氣體與燃燒用空氣導引 前浐；二：、周側’因此不需要如習知技術般使燃燒筒的 而。、、萌成錐狀，或於該燃燒筒設置複數個孔，而能夠 319946 9 200840979 將燃燒筒形成為大致固定直徑的筒狀。 '(發明的效果） 在本發明的輻射管燃燒器中，係將導引至輻射管内的 燃燒用空氣與從設於上述燃料氣體供給管之一次喷出口喷 出的燃料氣體混合並燃燒，上述燃燒用空氣中的氧濃度會 降低。接著，如上述般氧濃度降低的燃燒用空氣會越過抑 止板而被導引至燃料氣體供給管的前端的外周侧，且與從 設置於該燃料氣體供給管之上述放射喷出口喷出的燃料氣 f 體混合而在燃燒筒的外周侧燃燒，進而氧濃度降低的燃燒 用空氣係被導引至燃燒筒的前端侧。接著，在導入至上述 燃燒筒的燃燒用空氣較少的狀態下，燃料氣體係被從設置 於燃料氣體供給管的前端之直進喷出口導入至該燃燒筒 内，接著燃料氣體在不完全燃燒的狀態下被導引至燃燒筒 的前端，該燃料氣體會與被從燃燒筒的外周侧導引至燃燒 筒的前端之燃燒用空氣混合並燃燒。 如上所述，在本發明的輻射管燃燒器中，係使從一次 喷出口喷出之燃料氣體、從放射喷出口喷出之燃料氣體、 以及從直進喷出口喷出之燃料氣體以3階段來燃燒之，因 此，與習知的輻射管燃燒器相比，可進一步抑制火焰溫度 的升高，且進一步降低燃燒排放氣體中的ΝΟχ的量。此外， 亦能夠調整在燃燒筒的外周側燃燒之燃料氣體的量來抑制 燃燒筒的溫度的上升，而能夠提高燃燒筒的壽命。 【實施方式】 以下，根據所附加的圖式來具體說明本發明的實施形 10 319946 200840979 態的輻射管燃燒器。另外， 定為出現在下述實施形能者燃燒器並非限 ^ ^ , H在不變更本發明主旨的笳ff! •内，本發日㈣能夠進行適當變更而實施。 圍 、-射實施形態的幸畐射管燃燒器中，如第1圖所示，於 輕射官10的後部側設置有將燃燒用空氣供給 ' 内的燃燒用空氣供給口 η，並且於該輻射管1〇的中心: 設置有供給燃料氣體的燃料氣體供給管2〇。 # 並且’於上述燃料氣體供給管20的前端設置有使婵 、氣體往直線前進方向噴射的直進嗔出口 21，並且 ϊί進：：口21的後方的燃料氣體供給管20的前端部設 且有複數個使燃料氣體往放射方向f出的放射嘴出口 22。另外，亦能夠使從上述放射噴出口 22往放射方 之燃料氣體相對於放射方向而朝前後方向傾角 而喷出。 田J月度 ^此外’於該放射噴出σ 22的後方附近之燃料氣體供給 匕管20的外周係設置有抑止燃燒用空氣被直接導引至放^ 喷出口 22之抑止板23，並且將火星塞（spark Plug)或弓丨 火火實（pilot burner)等點燃手段12從該抑止板23往前 方突出而設置位於上述放射噴出口 22的附近。另外，亦能 夠於上述抑止板23設置孔（未圖式），可導引少量的燃燒 空氣。 工 亚且’在位於上述抑止板23之更後方的位置的燁料氣 體供給管20設有直徑猶大的凸出部％，且於該凸出部μ 設有複數個使燃料氣體朝放射方向往前方傾斜噴出的一次 319946 11 200840979 唷出口 25。據此，燃料氣體便沿著一次噴出口 25適當地 被喷出。 $ 另外’在本實施形態中，雖然為了如上述將從一次喷 出口 25噴出的燃料氣體適當地往前方送出而使一次喷^ 口 2 5朝放射方向往前方傾斜，但並非一定非得要使之往前 方傾斜喷出，亦能夠使之往後方傾斜噴出。此外，亦可不 汉置如上述的凸出部24而直接於燃料氣體供給管加設 一次噴出口 25。 ^200840979 IX. Invention description: « 【Technical field to which the invention belongs】 The present month relates to a radiant tube burner, specifically, the radiation is burned by the genus of the genus >> The inside of the radiant tube with the second cymbal is provided with a supply of sputum - the material oxygen of the material I I confess the total ^ ' person, ,, the rolling group I, to the official, in the fuel gas supply tube ; =; The direct injection port that is ejected in the direction is provided with a combustion tube that mixes and burns the combustion nipple/combustion air ejected from the straight nozzle outlet at the front end side of the igniting;:: Γ. The present invention is characterized in that, in the above-mentioned Koda Coats burner, it is possible to greatly reduce the amount of the combustion exhaust gas _ by the early composition, and to suppress the temperature rise of the combustion tube. The situation of reduced life. In the above-mentioned combustion exhaust gas, if it is not specified in advance, it means that the nitrogen portion of the fuel gas (5) is produced by oxidation of N0x (Fuei _, combustion to form nitrogen oxides), and in the fuel gas. N?x (Thermai shame "heat: nitrogen oxides") produced by the reaction of nitrogen (5) with milk (10) at a high temperature. μ This application is based on Japanese Patent Application No. 2007-67850, and The content of the radiant tube burner has been used in the past. In the case of reducing the amount of NOx contained in the combustion exhaust gas after combustion, in order to reduce the amount of N〇x contained in the combustion exhaust gas, Japanese Patent Laid-Open Publication No. 319946 6 200840979 A radiant tube burner is provided in a radiant tube in which a combustion air supply * for supplying combustion air is provided, and The burning A fuel gas supply pipe that supplies a fuel gas is provided inside the air supply pipe. Here, in the radiant tube burner, the primary combustion air supplied through the combustion air supply pipe and the fuel gas supply pipe are supplied through the fuel gas supply pipe. The supplied fuel gas is mixed in the combustion cylinder in a state where the fuel gas is excessive, and the secondary combustion air supplied through the outside of the combustion air supply pipe is mixed and completely burned. When the combustion is performed in two stages as described above, the increase in the flame temperature is suppressed to reduce the amount of helium in the combustion exhaust gas. However, when a combustion air supply pipe for supplying combustion air is additionally provided in the radiant tube, The manufacturing cost is increased, and it becomes very difficult to make the amount of cerium in the exhaust gas more U plus and minus due to the use of more stages for combustion. Further, in the prior art, the patent document 曰本特开平6 A radiant tube burner for supplying fuel gas has been disclosed in Japanese Laid-Open Patent Publication No. H-257737 a combustion tube is disposed on a front end side of the fuel gas supply pipe, the front end portion of the combustion tube is contracted into a tapered shape, and a plurality of holes are formed in the combustion tube. In the radiant tube burner, the radiant tube is passed through the radiant tube. The primary combustion air supplied to the combustion cylinder and the fuel gas supplied through the fuel gas supply pipe are mixed in the combustion cylinder in a state where the fuel gas is excessive, and a part of the gas mixed as described above is guided. Leading to the combustion tube is contracted into a tapered front end portion and burning it, and on the other hand, the remaining gas that is not guided to the tapered front end portion is guided to the combustion tube through the above-mentioned hole The outer peripheral side is mixed with the secondary combustion air guided to the outer peripheral side of the combustion cylinder and burned. - However, as in the above-described radiant tube burner, the front end portion of the combustion tube is contracted into a tapered shape, and the operation of providing a plurality of holes in the combustion tube is troublesome and has a problem that the manufacturing cost of the burner is increased. Further, when the remaining gas not guided to the front end portion is guided to the outer peripheral side of the combustion tube and mixed with the primary combustion air and burned as described above, the combustion rises to shorten the life of the combustion tube. problem. ～大巾田 [Summary of the invention] (Problems to be solved by Yu Ming) Problem This (4) Lesson 7 is to solve the above-mentioned various types of conventional radiant tube burners. The subject of the present invention is the gentleman who can be used by the steam star. Ten, the cost of reducing money. γ 丨:, (4) The composition is greatly increased to cause a decrease in the lifespan: the means of suppressing the combustion tube due to the temperature of the combustion target. The radiant tube burner system of the present invention A fuel is supplied to the inside of the gas supply pipe 2, and the fuel gas is supplied to the front end side of the pipe, and the fuel gas is supplied to the front end side of the pipe. A combustion cylinder in which the fuel gas discharged from the outlet is mixed with and burned by the combustion air of 319946 8 200840979 is characterized in that: the fuel gas is supplied to the front end portion of the fuel gas supply pipe behind the straight injection port to discharge the fuel gas in the radial direction. The radiation discharge port' is provided with a suppression plate on the outer circumference of the fuel gas supply pipe near the rear of the radiation discharge port, and the fuel gas p pipe is disposed at a position further behind the suppression plate to cause the fuel gas to be radiated A spray outlet that is sprayed in the direction. Here, in the above-mentioned Xingchang Shooting Camp, the iron is crying, and the singer wants to recognize the squad of the squad, in which the fuel gas is ejected from the first nozzle outlet of the set gas supply pipe to the radial direction. The fuel gas is appropriately burned and then returned to the furnace. Preferably, the reclaimed gas ejected from the discharge port in the radial direction is ejected obliquely forward. Further, in order to prevent the amount of paper in the combustion exhaust gas from greatly increasing the temperature of the combustion cylinder, it is preferable to set the amount of the fuel gas to be extracted from the primary outlet to be the sum of all the fuel gases: : In the light-tube burner of the soil: in order to make the combustion of the fuel gas ejected from the above-mentioned radiation neighboring outlets in the radiant tube, it is preferable to provide a plurality of fuel gas supply pipes respectively. The secondary discharge port is radiated, and the positions of the radiation discharge port and the secondary discharge port in the circumferential direction are different.在 〜 卜 In the radiant tube burner of the present invention, since it is not required to be ignited: the fuel gas mixed in the combustion cylinder and the combustion air guide the front raft; two: the circumferential side 'therefore, no need for conventional technology The burner is fired. , or a cone shape, or a plurality of holes are provided in the combustion tube, and the combustion tube can be formed into a cylindrical shape of a substantially fixed diameter by 319946 9 200840979. (Effect of the Invention) In the radiant tube burner of the present invention, the combustion air guided into the radiant tube is mixed with the fuel gas ejected from the primary discharge port provided in the fuel gas supply pipe, and is burned. The concentration of oxygen in the combustion air is reduced. Then, as described above, the combustion air having a reduced oxygen concentration is guided to the outer peripheral side of the tip end of the fuel gas supply pipe and over the fuel discharged from the radiation discharge port provided in the fuel gas supply pipe. The gas f is mixed and burned on the outer peripheral side of the combustion tube, and the combustion air having a lowered oxygen concentration is guided to the front end side of the combustion tube. Then, in a state where the combustion air introduced into the combustion cylinder is small, the fuel gas system is introduced into the combustion cylinder from the direct injection port provided at the front end of the fuel gas supply pipe, and then the fuel gas is incompletely combusted. In the state, it is guided to the front end of the combustion cylinder, and the fuel gas is mixed with the combustion air guided from the outer peripheral side of the combustion cylinder to the front end of the combustion cylinder and burned. As described above, in the radiant tube burner of the present invention, the fuel gas ejected from the primary discharge port, the fuel gas ejected from the radiation discharge port, and the fuel gas ejected from the direct injection port are in three stages. Combustion, therefore, the increase in flame temperature can be further suppressed as compared to conventional radiant tube burners, and the amount of helium in the combustion exhaust gas is further reduced. Further, it is also possible to adjust the amount of fuel gas burned on the outer peripheral side of the combustion tube to suppress an increase in the temperature of the combustion tube, and it is possible to increase the life of the combustion tube. [Embodiment] Hereinafter, a radiant tube burner of the embodiment 10 319946 200840979 of the present invention will be specifically described based on the attached drawings. In addition, it is assumed that the burner of the following embodiment is not limited to the limit, and H can be implemented by appropriately changing the present day (4) without changing the gist of the present invention. In the lucky tube burner of the embodiment of the present invention, as shown in Fig. 1, the combustion air supply port η for supplying the combustion air to the inside is provided on the rear side of the light projecting officer 10, and Center of the radiant tube 1 : A fuel gas supply pipe 2 供给 for supplying fuel gas is provided. And the front end of the fuel gas supply pipe 20 is provided with a straight feed port 21 for ejecting the crucible and the gas in the straight forward direction, and the front end portion of the fuel gas supply pipe 20 at the rear of the port 21 is provided. A plurality of nozzle outlets 22 for discharging the fuel gas in the radial direction f. Further, the fuel gas from the radiation discharge port 22 to the radiation side can be ejected toward the front-rear direction with respect to the radial direction. In addition, the outer periphery of the fuel gas supply manifold 20 near the rear of the radiation discharge σ 22 is provided with a suppression plate 23 for suppressing the combustion air from being directly guided to the discharge port 22, and the spark plug is placed. The ignition means 12 such as a spark plug or a pilot burner protrudes forward from the suppression plate 23 and is provided in the vicinity of the radiation discharge port 22. In addition, it is also possible to provide a hole (not shown) in the above-mentioned suppression plate 23 to guide a small amount of combustion air. The dip gas supply pipe 20 at a position further behind the above-mentioned suppression plate 23 is provided with a projection portion % having a large diameter, and the projection portion μ is provided with a plurality of fuel gases toward the radial direction. A 319946 11 200840979 唷 exit 25 is ejected from the front. Accordingly, the fuel gas is appropriately ejected along the primary discharge port 25. In the present embodiment, in order to appropriately feed the fuel gas discharged from the primary discharge port 25 as described above, the primary discharge port 25 is inclined forward in the radial direction, but it does not necessarily have to be By ejecting it obliquely forward, it can also be ejected obliquely to the rear. Further, the primary discharge port 25 may be directly provided to the fuel gas supply pipe without the projection 24 as described above. ^
此外，在本實施形態的輻射管燃燒器中，如第丨圖及 第2圖所示，藉由從上述抑止板23往前端側延伸： 個安裝構件26來使導人有從上述直進噴出口 21噴出^ =體之成為圓筒狀的燃燒筒3G，保持於上述燃料氣肿 、，、S官2 〇❺前端侧，而於抑止板2 3與該燃燒筒3 〇之間 抑止板2U拙山 在本貝知形悲中，雖然係藉由從 :=2延伸㈣3條扁條所構成之㈣構件 “ 30仔以保持，但使燃燒筒3〇得以保持之安 ； 的數目或種類並未特職定，亦可為其他的形能者。 另外，在本實施形態、中係使用成為大 ^ 筒狀者作為上述燃燒筒30。 疋直徑的圓 並且 1内之方式將外二述之輻射管燃燒器突出於加熱爐 空氣混合並燃燒時，係經由^中使簡氣體與燃燒用 燃燒用空氣導入：射=返燃燒用空氣供给管而使 輪射内，並且使經由上述燃料氣體供 319946 12 200840979Further, in the radiant tube burner of the present embodiment, as shown in the second and second figures, the attachment member 26 is extended from the stopper plate 23 toward the distal end side to allow the guide to be sprayed from the above-mentioned direct injection. The outlet 21 is sprayed out of the combustion cylinder 3G which is formed into a cylindrical shape, and is held at the front end side of the fuel gas, and the S 2 〇❺, and the plate 2 is restrained between the suppression plate 23 and the combustion tube 3 〇 Lushan is in the shape of the sorrow of Benbe, although it consists of: (4) three flat strips consisting of: = 2 (4) members of the "fourth" to maintain, but the number of combustion cylinders can be maintained; In addition, in the present embodiment, a large tubular shape is used as the combustion cylinder 30. The circle of the diameter of the 疋 is one of the two. When the radiant tube burner protrudes from the furnace and the air is mixed and burned, the igniting gas and the combustion air for combustion are introduced through the injection/return combustion air supply pipe, and the fuel is supplied through the fuel gas. 319946 12 200840979
V 給管20而導入的燃料氣體從上述的一次喷出口 25、放射 喷出口 22、以及直進喷出口 21喷出至輻射管10内，而使 該燃料氣體與上述燃燒用空氣混合。接著再利用設置於放 射喷出口 22的附近之上述點燃手段12使之點燃而燃燒。 此處，在使上述燃料氣體與燃燒用空氣混合並燃燒的 一開始，雖然該輻射管10内的温度低，但當使之如上述地 燃燒而使輻射管10内的溫度上升，則在混合有從上述一次 喷出口 25喷出的燃料氣體與燃燒用空氣之位置會有燃燒 ‘ 進行，上述燃燒用空氣的氧濃度會降低。 接著，如上述氧濃度降低的燃燒用空氣會越過上述抑 止板23而被導引至燃料氣體供給管20的前端的外周側， 且與從設置於該燃料氣體供給管20的前端部之上述放射 喷出口 22喷出的燃料氣體混合而在燃燒筒30的外周侧燃 燒，進而氧濃度降低的燃燒用空氣會被導引至燃燒筒30 的前端側。 ^ 而另一方面，在上述的燃燒筒30中，可藉由上述抑止 板23來抑止燃燒用空氣，因此被導入至該燃燒筒30内的 燃燒用空氣變得較少。接著，在如此地燃燒用空氣較少的 狀態下，燃料氣體會被從設置於燃料氣體供給管20的前端 之直進喷出口 21導入至該燃燒筒3 0内，接著燃料氣體在 不完全燃燒的狀態下被導引至燃燒筒30的前端，該不完全 燃燒的狀態的燃料氣體會與從燃燒筒30的外周侧被導引 出的上述燃燒用空氣混合並燃燒。 如此以3階段來燃燒燃料氣體的結果，便抑制火焰溫 13 319946 200840979The fuel gas introduced into the tube 20 is discharged from the primary discharge port 25, the radiation discharge port 22, and the straight injection port 21 into the radiant tube 10, and the fuel gas is mixed with the combustion air. Then, it is ignited and burned by the above-described ignition means 12 provided in the vicinity of the discharge discharge port 22. Here, at the beginning of mixing and burning the fuel gas and the combustion air, although the temperature in the radiant tube 10 is low, when the temperature in the radiant tube 10 is increased as described above, the mixture is mixed. The position of the fuel gas and the combustion air discharged from the primary discharge port 25 is burned, and the oxygen concentration of the combustion air is lowered. Then, the combustion air having the reduced oxygen concentration is guided to the outer peripheral side of the tip end of the fuel gas supply pipe 20 over the above-described suppression plate 23, and the above-described radiation from the tip end portion of the fuel gas supply pipe 20 The fuel gas discharged from the discharge port 22 is mixed and burned on the outer peripheral side of the combustion tube 30, and the combustion air having a lowered oxygen concentration is guided to the front end side of the combustion tube 30. On the other hand, in the above-described combustion cylinder 30, the combustion air can be suppressed by the above-described suppression plate 23, so that the combustion air introduced into the combustion cylinder 30 becomes small. Then, in a state where the amount of combustion air is small, the fuel gas is introduced into the combustion cylinder 30 from the straight-injection port 21 provided at the tip end of the fuel gas supply pipe 20, and then the fuel gas is incompletely combusted. In the state, the fuel gas in the incompletely combusted state is mixed with the combustion air guided from the outer peripheral side of the combustion cylinder 30 and burned. As a result of burning fuel gas in three stages, the flame temperature is suppressed. 13 319946 200840979
V *度的=，可降低燃燒排放氣體中的_的量。 >料丄給中，設置於燃 -或其在圓周方向的位置並未特別=出口 =的數目 體供給！2。分別設置3個放射喷出口二^ %，如弟3圖所示，較宜使燃料氣體供給管 =口 25 的放射噴出口 22與一次喷Α σ % 5圓周方向 八貝口 2 5的位罟；J：日田 丄 如此使燃料氣體供給管20的圓 置相兴。亦即，若 f -次喷出口 25的位置相異，從—次喷二：贺出：22與 氣體被燃燒之圓周方向的位置、與從 貝:：料 燃料氣體被燃燒之圓周方向的位置便相異、，可在圓= 的較寬位置進行燃燒而使輻射管】 向 輻射管1ΰ内的 上开造成紙的產生量增加或燃燒筒.30劣化等。 中田 上述使燃料氣體從設於燃料氣體供給管2 0 的一次贺出口 25、放射喷出口 22、以及 ；2+° 出時，若從一次噴出口 25或放射喷出口 、口」贺 體的比例過度變高時，燃燒筒3〇㈤各贺出之燃料氣 燒筒3 0變得容易劣化。反之從皿^過度變高而使燃 喷出口 22 W職體變；或放射 進喷出…“在燃燒筒3。的:::== 所致的火焰溫度會變得料高而使肌變得容易產生^，、凡 因此，較宜將從上述一次喷出口 對於全部燃料氣體的體積比例予以調整至5至3 == 319946 14 200840979 .圍’將從放射噴出口 22喷出的燃料氣體相對於所有燃料氣 體的體積比例予以調整至5至30v〇1%的範圍，並將所剩的 部分從上述的直進喷出口 21喷出。 一此處，在上述的輻射管燃燒器進行了實驗，亦即，使 用以5 0 V ο 1 %的比例含有氫、以2 〇 v 〇丨％的比例含有曱烷之模 擬（：00((：〇1^0”11(；犯；煉焦爐氣）來作為燃料氣體，且= 燃燒容量137000kcal/h、爐内溫度約940。(：、空氣比1 15 (之條件，將從上述放射噴出σ 22喷出之燃料氣體的體積比 、例設為17.5v〇1%，且使從上述一次噴出口託與直進噴出 口 21喷出之燃料氣體的體積比例變更來進行辦 豆 =在上述模擬C0G中未含有氮部分，因此前述：料生成 氮氧化物的產生量為Ov〇1%。因此，本實驗中所產生的N⑴ 的量係燃燒所產生的熱生成Ν〇χ的量。 χ 並且’對伴隨從上述一次嘴出口 25喷出之燃料氣體的 體積比例的變化而造成燃燒排放氣體中的Ν〇χ的濃度變化 、及燃燒筒的溫度變化進行調查’於第4圖顯示該調查結 果。其中，在第4圖係以實線表示Ν〇χ的濃度變化，以卢° 線表示燃燒筒的溫度變化。此外，關於燃燒排放氣體中^ 歐的濃度係以氧濃度成為Uvc)1%之方式所換算而得之值 來表示。 嫩結果，隨著從-次喷出口 25喷出之燃料氣體的體積比 例雙大，燃燒排放氣體中的Ν〇χ的濃度會減少，另一 燃燒筒的溫度會上升。而在將從一次噴出口託噴出之燃 氣體的體積比例設Q 5至3Qvq1%的範圍時，_的濃度 319946 15 200840979 胃心為燃燒筒的溫度的上升並 具體言之’係較宜將從-次噴出ϋ25嘖出的 積比例設定為8至18满的範圍。 ““仏的體 ^广當使用以50V〇u的比例含有氯、以m〇i%的比 時？在：Π模广co咖e 0ven Gas)來作為燃料氣體 "在白知輪射管燃燒器中，N〇x濃度一般為12〇至 150volppm，相對於此，在本發明的輻射管燃燒器中，係 到能夠將恥x濃度降低至約52_卿之較大的效果。μ 另外，關於燃料生成氮氧化物，在「燃燒裝置的技 日刊工業新聞社發行，曰本燃燒器研究會編，至⑻ 中’已記載有2階段燃燒對燃料生成氮氧化物的抑制有效 果’而本發明的輻射管燃燒器亦顯然對燃料生成氮氧化物 的抑制有效果。 【圖式簡單說明】 —壯第1圖係顯示將本發明的一實施形態的輻射管燃燒器 女叙至加熱爐之狀態的概略剖面說明圖。 第2圖係顯示在相同實施形態的輻射管燃燒器中，利 用由從抑止板延伸出的3條扁條所構成之安裝構件來保持 燃燒筒之狀態的概略說明圖。 班第3圖係顯示在相同實施形態的輻射管燃燒器中，設 ;火、、:料氣體供給管之放射噴出口與一次喷口在圓周方向 的位置關係之剖面說明圖。 每人第4圖係顯示在使用相同實施形態的輻射管燃燒器之 只鲮中，伴隨從一次喷出口噴出之燃料氣體的體積比例的 319946 16 中的NO《熱生成氮氧化物)的 化的關係之模式圖。 200840979 變化而造成燃燒排放氣體 度變化及燃燒筒的溫度變 【主要元件符號說明】The V* degree = can reduce the amount of _ in the combustion exhaust gas. > The material is set in the combustion - or its position in the circumferential direction is not particularly = the number of outlet = body supply! 2. Three radiation discharge ports are respectively provided, and as shown in the middle view of Fig. 3, it is preferable to make the radiation discharge port 22 of the fuel gas supply pipe = port 25 and the position of the first squirt σ % 5 in the circumferential direction of the eight-bay port 2 5 ; J: Hita-Tsu has so that the fuel gas supply pipe 20 is rounded up. That is, if the positions of the f-primary discharge ports 25 are different, the position of the secondary injection: the outflow: 22 is in the circumferential direction in which the gas is burned, and the position in the circumferential direction from which the fuel gas is burned. The difference is that the combustion can be performed at a wide position of the circle = the radiant tube is caused to increase the amount of paper generated in the upper portion of the radiant tube 1 or the deterioration of the combustion tube .30. In the case of the above-mentioned fuel gas from the primary gas outlet 25, the radiation discharge port 22, and the 2+° of the fuel gas supply pipe 20, the ratio of the fuel gas from the primary discharge port 25 or the radiation discharge port to the mouth When the temperature is excessively high, the fuel gas burners 30 of the combustion cylinders 3 (5) are easily deteriorated. On the contrary, the temperature of the burner is excessively high, so that the combustion outlet 22 W is changed; or the radiation is injected into the discharge... "The temperature of the flame caused by the combustion cylinder 3:::== will become high and the muscle will be changed. It is easy to generate ^, and therefore, it is preferable to adjust the volume ratio of the entire primary fuel outlet to the total fuel gas to 5 to 3 == 319946 14 200840979. The surrounding 'fuel gas emitted from the radiation discharge port 22 is relatively The volume ratio of all the fuel gases is adjusted to a range of 5 to 30 v 〇 1%, and the remaining portion is ejected from the above-described straight-injecting port 21. Here, an experiment was conducted in the radiant tube burner described above, That is, a simulation in which hydrogen is contained in a ratio of 50 V ο 1 % and decane is contained in a ratio of 2 〇v 〇丨% (: 00 ((: 〇 1 ^ 0" 11 (; sin; coke oven gas) The fuel gas is used as the fuel gas, and the combustion capacity is 137,000 kcal/h, and the furnace temperature is about 940. (:, the air ratio is 1 15 (the condition is that the volume ratio of the fuel gas ejected from the radiation discharge σ 22 is, for example, 17.5). 〇1%, and the body of the fuel gas ejected from the primary discharge port and the direct injection port 21 The amount of N(1) produced in the present experiment is generated by combustion. The amount of N(1) produced in the above-mentioned simulated COG is not contained in the above-mentioned simulated C0G. Therefore, the amount of N(1) produced in this experiment is generated by combustion. The amount of heat generated enthalpy. χ and 'the change in the concentration of enthalpy in the combustion exhaust gas accompanying the change in the volume ratio of the fuel gas ejected from the above-described primary nozzle outlet 25, and the temperature change of the combustion cylinder The investigation is shown in Figure 4. The results of the survey are shown in Figure 4. In Figure 4, the change in the concentration of helium is indicated by the solid line, and the temperature change of the combustion tube is indicated by the Lu ° line. The concentration is expressed as a value obtained by converting the oxygen concentration to 1% of Uvc). As a result, as the volume ratio of the fuel gas ejected from the secondary discharge port 25 is double, the enthalpy in the combustion exhaust gas The concentration of bismuth will decrease, and the temperature of the other combustion tube will rise. When the volume ratio of the gas to be ejected from the primary discharge port is set to the range of Q 5 to 3Qvq1%, the concentration of _ 319946 15 200840979 combustion The increase in temperature and, in particular, the ratio of the product to be ejected from the squirting ϋ25 is set to a range of 8 to 18 full. "The body of the cockroach is used in a ratio of 50 V 〇u to contain chlorine, In the case of m〇i%, in the case of: "fuel gas" in the Baizhi wheel tube burner, the concentration of N〇x is generally 12〇 to 150volppm, relative to this. In the radiant tube burner of the present invention, it is possible to reduce the shame x concentration to a large effect of about 52 Å. μ In addition, regarding the fuel to generate nitrogen oxides, the "combustion device technology magazine" news agency Issued by the Sakamoto Burner Research Society, to (8), it has been described that two-stage combustion has an effect on the suppression of fuel-forming nitrogen oxides. The radiant tube burner of the present invention also apparently inhibits the formation of nitrogen oxides from fuel. effect. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional explanatory view showing a state in which a radiant tube burner according to an embodiment of the present invention is placed in a heating furnace. Fig. 2 is a schematic explanatory view showing a state in which a combustion tube is held by a mounting member composed of three flat strips extending from a stopper plate in the radiant tube burner of the same embodiment. Fig. 3 is a cross-sectional explanatory view showing the positional relationship between the radiation discharge port of the material gas supply pipe and the primary nozzle in the circumferential direction in the radiant tube burner of the same embodiment. Fig. 4 is a diagram showing the formation of NO "heat-generating nitrogen oxides" in 319946 16 in the volume ratio of the fuel gas ejected from the primary discharge port in the crucible using the radiant tube burner of the same embodiment. Schematic diagram of the relationship. 200840979 Change caused by changes in the degree of combustion exhaust gas and the temperature of the combustion tube [Main component symbol description]
1 加熱爐 10 輻射管 12 點燃手段 21 直進噴出口 23 抑止板 25 一次喷出口 30 燃燒筒 la 壁面 11 燃燒用空氣供給 20 燃料氣體供給管 22 放射噴出口 24 凸出部 26 安裝構件 319946 171 Heating furnace 10 Radiant tube 12 Ignition means 21 Direct injection outlet 23 Suppression plate 25 Primary discharge port 30 Combustion cylinder la Wall 11 Combustion air supply 20 Fuel gas supply pipe 22 Radiation discharge port 24 Projection part 26 Mounting member 319946 17