200303971 玖、發明說明 (發月說明應敘明.發明所層之技術領域、先前技術、内容、實施方式及圖式簡單說明） 【發明所屬之技術領域】 本發明係有關於一種單端型蓄熱式輻射管燃燒裝置及 其燃燒方法。 5 【】 單端型輻射管燃燒裝置係適用於難以設置U型輻射管 燃燒裝置或W型輻射管燃燒裝置之加熱設備者，此種單端 型輻射管燃燒裝置可例舉如日本專利公開公報特開平7_ 83414號中揭示者。 1〇 即，如第2圖所示，前述單端型輻射管燃燒裝置凡係 由前端閉塞之外管1和設於該外管丨之内部之内管2的雙 層官構造所構成，且，該内管2内配設有燃燒用空氣供給 & 3，此外，該燃燒用空氣供給管3内配設有燃料氣體供 π笞4且將燃燒用空氣供給至形成在該燃燒用空氣供給 15 & 3和内官2之間的通路5，同時由燃料氣體供給管4供 給燃料氣體而在燃燒室6使其燃燒，且其燃燒排氣在外管 1之閉塞端部反轉之後，通過由外管丨和内管2形成之環 狀空間7而加熱外管！的同時，也預熱與該燃燒排氣之流 向對向而供給之燃燒用空氣後被排出。 2〇 然而，如前所述者，預熱與燃燒排氣之流向對向而供 給之燃燒用空氣的構造中，由於可進行熱交換之熱傳面積 被限制，故爐内溫度為95(rc中熱回收率大約係65% ，熱 回收率有限度。 因此，曰本專利公開公報特開平7-83414中揭示有如 200303971 玖、發明說明 第3圖所不之構造之單端型蓄熱式輕射管燃燒|置丁2。 該單端型蓄熱式騎管職裝置了2係相閉塞之外管 1〇和喊於該外管1G内之内管u的雙層管構造，且分: 地’在外管1G和内管U之後端部間具有外管蓄熱體^， 5内管11之後端部亦具有内管蓄熱體13，且外管蓄熱體12 和内管蓄熱體13之後端係藉由切換閥v而連通㈣翻 空氣供給鼓風機14或排氣鼓風機15。 再者，内管imx及外管1G和内管u形成之通路 16内分別配設有内管燃料喷嘴17和外管燃料喷嘴^。 10 此外，當驅動前述燃燒用空氣供給鼓風機14和排氣鼓 風機15,並且令切換閥v成為圖示之狀態而由内管燃料噴 噶17供給燃料氣體以點火時，燃燒氣體由内管11經過前 述通路16而加熱外管10之後，燃燒氣體會通過外管蓄熱 體12，而可回收燃燒排氣之顯熱達最大限度。 15 之後，切換切換閥V，並且由外管燃料喷嘴18供給燃 料氣體。此時，由於燃燒用空氣通過業經加熱之外管蓄熱 體12而充分被預熱再供於燃燒，故可加強節省能源的效果 ，且，可實現高效率之燃燒。 經過預定時間後，便切換切換閥V，並且由内管料燒 20喷嘴17供給燃料氣體以進行燃燒。其後，反覆前述步驟， 進行輪流燃燒。 【發明内容】 發明欲解決課題 然而，前述單端型蓄熱式輻射管燃燒裝置丁2中，因為 200303971 砍、發明說明 在高溫之預熱空氣中燃燒，所以燃燒火焰溫度高，熱氮氧 化物（thermal NOx)增多。又，為了要交替地切換燃燒用 空氣之供給和燃燒排氣之排出，所以須於燃燒用空氣配管 和燃燒排氣配官中設置切換閥，造成爐周圍因為配管而變 5 得複雜。 更進一步，由於係將内管燃料喷嘴17及外管燃料喷嘴 18配置於内管蓄熱體13和外管蓄熱體12之下游側（前方 )的構造，故有燃料氣體和燃燒用空氣難以均一地混合， 特別疋在燃料氣體之自燃溫度以下的低爐溫時，會頻頻發 10 生點火不良而無法穩定燃燒的問題。 因此，本發明之目的即在提供一種可同時地實現減少 氮氧化物及加強節省能源的效果和高效率之燃燒，而不會 損傷燃燒噴嘴的單端型蓄熱式輻射管燃燒裝置，以及即使 在燃料氣體之自燃溫度以下之低爐溫時依然可穩定燃燒之 15單端型蓄熱式輻射管燃燒裝置之燃燒方法。 用以解決課題之方法 為了達成前述目的，本發明係一種單端型蓄熱式輻射 官燃燒裝置，係在由一端閉塞之外管以及於該外管之内側 以預定間隔配置之内管所構成之單端輻射管之該外管和該 20内管所形成之外管環狀空間與該内管内，内建有外管蓄熱 體和内官畜熱體，同時該外管環狀空間和該内管之各後部 與2根交替地連通於空氣供給源和排氣裝置的進排氣管連 接，且設於該外管環狀空間和内管之燃燒喷嘴之燃燒每隔 預定時間會交替地切換而進行輪流燃燒，且該内管蓄熱體 200303971 玖、發明說明 或該外管蓄熱體會交替地回收其燃燒排氣之顯熱，而在高 溫之預熱空氣中進行燃燒者，其特徵在於·· 前述2根進排氣管構造成前端部具有細腰型吸引管， 且七述進排乳管係利用具有排氣排出口之旁通管連通，且 5前述2根進排氣管中任一方之進排氣管係藉切換切換闕而 交替地連通於空氣供給裝置， 同時前述燃燒喷嘴包含有：夕卜管燃燒喷嘴，係多數地 «又置於刖述外官環狀空間，且由中心部喷出燃料氣體，並 由其外周喷出冷卻空氣之雙層管構造者；及，内管燃燒喷 10嘴，係配置於前述内管之中心部，且由中心部喷出燃料氣 體，並由其外周喷出冷卻空氣之雙層管構造者， π守如述内管蓄熱體係安裝於前述内管和前述内管燃 燒喷嘴之前端部之間，又，前述外管蓄熱體係安裝於前述 外管和前述外管燃燒喷嘴之前端部之間。 15 再者，本發明係一種單端型蓄熱式輻射管燃燒裝置之 燃燒方法，係在由一端閉塞之外管以及於該外管之内側以 預疋間隔配置之内管所構成之單端輻射管之該外管和該内 管所形成之外管環狀空間與該内管内，内建外管蓄熱體和 内管蓄熱體，同時將該外管環狀空間和該内管之各後部與 20 2根交替地連通於空氣供給源和排氣裝置的進排氣管連接 ，且每隔預定時間交替地切換設於該外管環狀空間和内管 之燃燒噴嘴之燃燒而進行輪流燃燒，且利用該内管蓄熱體 或該外管蓄熱體交替地回收其燃燒排氣之顯熱，而在高溫 之預熱空氣中進行燃燒者，其特徵在於： 200303971 玖、發明說明 爐内溫度在燃料氣體之自燃溫度以下時，將預混燃料 氣體供給至設於前述外管環狀空間或内管之前述燃燒喷嘴 中任一方而繼續連續燃燒，且若爐内溫度變成在燃料氣體 之自燃溫度以上日可’每隔預定時間便交替地切換前述兩燃 5 燒噴嘴之燃燒而輪流燃燒。 【實施方式】 發明之實施形態 接著，依照第1圖說明本發明之一實施形態。 本發明之單端型蓄熱式輻射管燃燒裝置τ，大致包含 1〇有單端輻射管20，内管燃燒喷嘴20，外管燃燒噴嘴3〇， 内管蓄熱體Ri，外管蓄熱體,燃燒用空氣供給鼓風機 40，及燃料氣體供給源41。 此外，前述單端輻射管2〇係由前端（爐内側）閉塞之 外官21 ,以及於該外管21之内部以預定間隔配設之較該 外笞21短的内管22所構成，且内管22内部和外管21内 方利用外管前端部連通。另，前述外管21和内管22之後 端係閉塞的。 前述内管燃燒噴嘴26係以預定間隔而由後端安裝於前 述内官22之中心部且其前方形成有内管燃燒室I者，包 20合有中心部之用以噴出燃料氣體之第i燃料供給管U，及 以預定間隔配設於其外周之第i冷卻空氣供給管28，且前 述第1燃料供給管27和第i冷卻空氣供給管28之間形成 有第1冷卻空氣供給路29。 月述外官燃燒噴嘴3〇係對外管21和内管22相隔預定 200303971 玖、發明說明 間隔而由後端安裝於前述外管21和内管 門& 22所形成之環狀 空間23内且其前方形成有外管燃燒室h者，包含有中、、 部之用以喷出燃料氣體之第2燃料供給管31，及以預定= 隔配設於其外周之第2冷卻空氣供給管32，且前述第2燃 5料供給管31和第2冷卻空氣供給管32之間形成有第200303971 发明, description of the invention (the description of the month should be stated. The technical field, prior art, content, embodiments and drawings of the invention layer are briefly explained) [Technical field to which the invention belongs] The present invention relates to a single-ended heat storage Radiant tube combustion device and combustion method thereof. 5 [] Single-ended radiant tube combustion device is suitable for heating equipment that is difficult to install U-shaped radiant tube combustion device or W-shaped radiant tube combustion device. Such single-ended radiant tube combustion device can be exemplified by Japanese Patent Publication Revealed in JP-A-7_83414. 10 That is, as shown in FIG. 2, the aforementioned single-ended radiant tube combustion device is generally composed of a double-layered official structure in which a front end occludes the outer tube 1 and an inner tube 2 provided inside the outer tube 丨, and A combustion air supply & 3 is arranged in the inner pipe 2 and a fuel gas supply π 笞 4 is arranged in the combustion air supply pipe 3 and the combustion air is supplied to the combustion air supply formed therein. 15 & 3 and the internal passage 2 and the fuel gas is supplied from the fuel gas supply pipe 4 to burn it in the combustion chamber 6, and the combustion exhaust gas is reversed at the closed end of the outer pipe 1, and passes through The annular space 7 formed by the outer tube 丨 and the inner tube 2 heats the outer tube! At the same time, the combustion air supplied in opposition to the flow of the combustion exhaust gas is preheated and discharged. 2〇 However, as mentioned above, in the structure of the combustion air supplied by the preheating and combustion exhaust gas flow in the opposite direction, the heat transfer area is limited, so the furnace temperature is 95 (rc The heat recovery rate is about 65%, and the heat recovery rate is limited. Therefore, Japanese Patent Laid-Open Publication No. Hei 7-83414 discloses a single-ended thermal storage type light beam having a structure not shown in 20033971 and the third description of the invention. Tube Combustion | Set Ding 2. This single-ended regenerative riding stewardship device has a double-layered tube structure of a 2-series phase-blocking outer tube 10 and an inner tube u shouting inside the outer tube 1G, and is divided into: There is an outer tube heat storage body ^ between the outer tube 1G and the inner tube U after the end, 5 the inner tube 11 also has the inner tube heat storage body 13 after the end, and the outer tube heat storage body 12 and the inner tube heat storage body 13 are connected by the rear end. The switching valve v communicates with the blower air supply blower 14 or the exhaust blower 15. In addition, the inner tube imx and the outer tube 1G and the inner tube u are formed in a passage 16 provided with an inner tube fuel nozzle 17 and an outer tube fuel nozzle. ^. 10 In addition, when the aforementioned combustion air supply blower 14 and exhaust blower 15 are driven, When the valve v is in the state shown in the figure and the fuel gas is supplied from the inner tube fuel spray 17 to ignite, the combustion gas passes through the passage 16 from the inner tube 11 to heat the outer tube 10, and the combustion gas passes through the outer tube heat storage body 12, and The sensible heat of the combustion exhaust gas can be recovered to the maximum. 15 After that, the switching valve V is switched and the fuel gas is supplied from the outer tube fuel nozzle 18. At this time, the combustion air is sufficiently passed through the heated outer tube heat storage body 12 The preheating is supplied to the combustion, so the energy saving effect can be enhanced, and high-efficiency combustion can be achieved. After a predetermined time, the switching valve V is switched, and the fuel gas is supplied from the nozzle 17 of the inner tube burner 20 for combustion After that, the above steps are repeated and the combustion is carried out alternately. [Summary of the Invention] However, in the aforementioned single-ended regenerative radiant tube combustion device D2, because 200303971 is cut, the invention explains that it burns in high temperature preheated air Therefore, the combustion flame temperature is high, and the thermal NOx is increased. In addition, in order to alternately switch the supply of combustion air and the combustion exhaust gas, Therefore, it is necessary to install switching valves in the combustion air piping and combustion exhaust piping, which makes the surrounding area of the furnace complicated due to piping. Furthermore, because the inner tube fuel nozzle 17 and the outer tube fuel nozzle 18 are arranged at The structure on the downstream side (front) of the inner tube heat storage body 13 and the outer tube heat storage body 12 makes it difficult to mix the fuel gas and combustion air uniformly, especially at low furnace temperatures below the auto-ignition temperature of the fuel gas. A problem arises that the ignition is not good and the combustion cannot be stabilized. Therefore, the object of the present invention is to provide a unit that can simultaneously achieve the reduction of nitrogen oxides and enhance the energy saving effect and high efficiency combustion without damaging the combustion nozzle. End-type regenerative radiant tube combustion device and a combustion method of 15 single-end regenerative radiant tube combustion device capable of stably burning even at a low furnace temperature below the self-ignition temperature of fuel gas. In order to achieve the foregoing object, the present invention is a single-ended regenerative radiation officer combustion device, which is composed of an inner tube closed at one end and an inner tube arranged at a predetermined interval inside the outer tube. The outer tube annular space formed by the outer tube and the 20 inner tube of the single-ended radiant tube and the inner tube, an outer tube heat storage body and an inner official animal heat body are built in, and the outer tube annular space and the inner tube Each rear part of the pipe is connected to two intake and exhaust pipes which alternately communicate with the air supply source and the exhaust device, and the combustion nozzles provided in the annular space of the outer pipe and the inner pipe are alternately switched at predetermined intervals. The burners take turns, and the inner tube heat storage body 200303971, the invention description or the outer tube heat storage body will alternately recover the sensible heat of the combustion exhaust gas, and the burner is performed in high temperature preheated air, which is characterized by ... The aforementioned two intake and exhaust pipes are structured to have a narrow waist suction pipe at the front end, and the seven intake and exhaust pipes are communicated by a bypass pipe having an exhaust exhaust port, and any one of the aforementioned two intake and exhaust pipes The intake and exhaust pipes are switched by The 阙 is switched to alternately communicate with the air supply device. At the same time, the aforementioned combustion nozzles include: Xibu tube combustion nozzles, which are mostly placed in the outer ring space of the above description, and the fuel gas is ejected from the center, and A double-layered tube structure that sprays cooling air on its outer periphery; and 10 nozzles for combustion nozzles of the inner tube, which are arranged at the center of the aforementioned inner tube, and spray fuel gas from the center, and spray cooling air from its periphery. For the double-tube construction, π Shouru said the inner tube heat storage system is installed between the inner tube and the front end of the inner tube combustion nozzle, and the outer tube heat storage system is installed between the outer tube and the outer tube combustion nozzle. Between the front ends. 15 Furthermore, the present invention is a single-end type thermal storage type radiant tube combustion device combustion method, which is a single-ended radiation composed of an outer tube closed at one end and an inner tube arranged at a predetermined interval inside the outer tube. The outer tube annular space formed by the outer tube and the inner tube and the inner tube, an outer tube heat storage body and an inner tube heat storage body are built in, and the outer tube annular space and each rear portion of the inner tube and 20 The two intake and exhaust pipes connected to the air supply source and the exhaust device are alternately connected, and the combustion nozzles provided in the annular space of the outer pipe and the inner pipe are alternately switched at predetermined intervals for alternate combustion. And using the inner tube heat storage body or the outer tube heat storage body to alternately recover the sensible heat of the combustion exhaust gas, and perform the combustion in high temperature preheated air, which is characterized by: 200303971 When the auto-ignition temperature of the gas is below, the premixed fuel gas is supplied to any one of the aforementioned combustion nozzles provided in the annular space of the outer tube or the inner tube to continue continuous combustion, and if the temperature in the furnace becomes the auto-ignition temperature of the fuel gas Above the day, the combustion of the two-burner and 5-burner nozzles can be alternately switched at predetermined time intervals and alternately burned. [Embodiment] Embodiment of the Invention Next, an embodiment of the present invention will be described with reference to Fig. 1. The single-ended regenerative radiant tube combustion device τ of the present invention roughly includes a single-ended radiant tube 20, an inner tube combustion nozzle 20, an outer tube combustion nozzle 30, an inner tube heat storage body Ri, an outer tube heat storage body, and combustion The blower 40 and the fuel gas supply source 41 are supplied with air. In addition, the aforementioned single-ended radiant tube 20 is composed of a front end (inside the furnace) that blocks the outer tube 21, and an inner tube 22 shorter than the outer tube 21 arranged at a predetermined interval inside the outer tube 21, and The inside of the inner tube 22 and the inside of the outer tube 21 are communicated by a front end portion of the outer tube. The rear ends of the outer tube 21 and the inner tube 22 are closed. The inner tube combustion nozzle 26 is installed at a predetermined interval from the rear end to the central portion of the inner officer 22 and an inner tube combustion chamber I is formed in front of the inner tube. The package 20 includes the i-th central portion for ejecting fuel gas. The fuel supply pipe U and the i-th cooling air supply pipe 28 arranged at predetermined intervals on the outer periphery thereof, and a first cooling air supply path 29 is formed between the first fuel supply pipe 27 and the i-th cooling air supply pipe 28. . The external combustion nozzle 30 described above is installed in the annular space 23 formed by the outer tube 21 and the inner tube door & 22 at the rear end by a predetermined interval of 200303971 玖, the interval between the outer tube 21 and the inner tube 22, and An outer tube combustion chamber h is formed in front of the second tube, and includes a second fuel supply pipe 31 for ejecting fuel gas in the middle, and a second, and a second cooling air supply pipe 32 arranged on the periphery of the second fuel supply pipe 32 at predetermined intervals. And a first fuel supply pipe 31 and a second cooling air supply pipe 32 are formed between
卻空氣供給路33。 T 又，分別地，於前述内管22和第！冷卻空氣供給管 28之間形成之環狀空_前部裝填有内管蓄熱體&，而於 前述環狀空間23之前述第2冷卻空氣供給管％的外周裝 10 填有外管蓄熱體R2。 更進—步，於前述外管21和内管22之後端部設有第 1進排氣管24a和第2進排氣管24b ,且該等第！、第2進 排氣管24a、24b分別具有第！、第2細腰型吸引管3私、 34b，同時該等細腰型吸引管34a、3朴部分係利用具有排 15氣排出口 36之旁通管35連通。 前述燃燒用空氣供給鼓風機40係藉由外管燃燒用空氣 切換閥Vi而與第2細腰型吸引管3朴連接，又，係藉由内 官燃燒用空氣切換闊％而與第1細腰型吸引管34a連接， 同時係藉由調節閥V3而連通於設在第！冷卻空氣供給路 20 29之空氣供給管的混合器42和第2冷卻空氣供給路33。 如述燃料氣體供給源41係藉由減壓閥v4、昇溫用電 磁闕V6而連通於設在第1冷卻空氣供給路29之空氣供給 官的混合器42，同時係藉由減壓閥v5而分別地，由内管 燃燒用燃料切換閥V?連通於第1燃料供給管27，又，由 10 200303971 玖、發明說明 外管燃燒用燃料切換閥Vs連通於第2燃料供給管31。 接下來，说明前述構造之單端型蓄熱式輻射管燃燒裝 置τ的操作。 首先’關閉外管燃燒用空氣切換閥，開啟内管燃燒 5用空氣切換閥V2,開啟調節閥V3,開啟昇溫用電磁閥ν6 ，關閉内管燃燒用燃料切換閥V7和外管燃燒用燃料切換閥 V8,且藉由第i細腰型吸引管34a而由燃燒用空氣供給鼓 風機40將燃燒用空氣從第i進排氣管24a供給至内管22 内，同時將藉混合器42預混之預混燃料氣體供給至前述内 1〇管燃燒喷嘴26之第i冷卻空氣通路29，且將設在内管燃 燒室Si内之圖中未顯示的引火燃燒器或火星塞等點火，藉 此點燃且於内管燃燒室Si開始燃燒。 然後，藉前述燃燒所產生之燃燒排氣在外管21之閉塞 端部反轉，且流過由内管22和外管21形成之環狀空間23 15 ，並加熱外官畜熱體R2，再從第2進排氣管24b由設在旁 通官35之排氣排出口 36排出。此時，因為由第i細腰型 吸引管34a喷出之燃燒用空氣的吸引作用，所以一部份之 前述排氣被吸進燃燒用空氣内，而有助於減少氮氧化物。 如前所述者，雖然燃燒排氣加熱外管蓄熱體&的同時 20也加熱外管燃燒喷嘴30,但是因為由調節閥V3將預定量 之冷部用空氣供給至外管燃燒喷嘴3G之第2冷卻用空氣供 給管32,所以可防止外管燃燒喷嘴3G之熱損傷及殘留燃 料之裂解的產生。 此外，僅以前述内管燃燒喷嘴26所行之燃燒係持續到 11 200303971 玖、發明說明 爐内溫度到達預定溫度，例如燃料氣體之自燃溫度以上為 止。 這疋因為若爐内溫度到達例如燃料氣體之自燃溫度之 刖，由第1燃料供給管27供給燃料氣體，則由於該燃料氣 體係以例如約l〇〇m/秒之高速喷出，故無法充分地與燃燒 用空氣混合等的理由，燃燒就會不穩定。 因此’若爐内溫度到達預定溫度，便關閉前述内管燃 燒用空氣切換閥％和昇溫用電磁閥，開啟外管燃燒用 空氣切換閥Vi和外管燃燒用燃料切換閥v8,且由第2燃 10料供給管31供給業已調節於預定壓力之燃料氣體，同時由 第2進排氣官24b供給燃燒用空氣，並利用設在外管燃燒 室S2内之圖中未顯示的點火裝置點火燃燒。此時，由於燃 燒用空氣通過外管蓄熱體R2，且在其間被預熱，故可立即 進行穩定之燃燒。 15 還有，前述燃燒排氣在外管21之閉塞端部反轉，且流 經内官22内而加熱内管蓄熱體Ri，再通過第1進排氣管 24a由排氣排出口 36排出。 此時’雖然内管燃燒喷嘴26藉高溫之燃燒排氣加熱， 但疋因為由調節閥V3將預定量之冷卻空氣供給至第1冷卻 20空氣供給路29，所以亦可防止内管燃燒噴嘴26之熱損傷 及殘留燃料之裂解的產生。 之後’經過預定時間後，例如1 〇秒，便關閉外管燃燒 用空氣切換閥和外管燃燒用燃料切換閥v8，開啟内管 燃燒用空氣切換閥V2和内管燃燒用燃料切換閥V7，使燃 12 200303971 玖、發明說明 料氣體由第1燃料供給管27，以及業已藉由内管蓄熱體& 預熱之燃燒用空氣噴出至内管燃燒室心，且利用圖中未顯 不的點火裝置點火而進行穩定之燃燒。該燃燒排氣通過而 加熱外官畜熱體R2之後，藉由第2進排氣管24b而由排氣 5排出口 36排出。此時，雖然外管燃燒喷嘴30藉高溫之燃 燒排氣加熱，但是因為由調節閥％將預定量之冷卻用空氣 供給至第2冷卻用空氣供給管32，所以亦可防止外管燃燒 喷嘴30之熱損傷及殘留燃料之裂解的產生。 之後’每隔預定時間，反覆前述動作。 10 此外，所使用之燃料只要是氣體燃料即可，並沒有特 別限定。特別係使用丙烷氣和丁烷氣等高熱量值氣體時， 因為燃燒器轉弱時之燃燒性提高及切換輪流燃燒時可產生 餘燃（即使燃燒切換成另一方之燃燒器，還是有火焰存在 於這一方之燃燒器的現象），所以宜利用燃燒用空氣稀釋前 15述燃料’且令其成為將低發熱量調節成& = 5000〜10000kcal/m3N之稀釋燃料。 又，切換輪流燃燒時之燃料氣體及燃燒用空氣時，當 然疋控制成·切換閥之開啟動作係先開啟燃燒用空氣切換 閥之後再開啟燃燒用燃料切換閥，且關閉動作係先關閉燃 20 燒用燃料切換閥再關閉燃燒用空氣切換閥。 更進一步，前述實施形態中係於第1、第2進排氣管 24a、24b設置細腰型吸引管34a、34b，且藉著來自一方之 進排氣管之燃燒用空氣之由細腰型吸引管噴出的運動量， 並由另一方之進排氣管藉由旁通管35而將一部份之燃燒排 200303971 玖、發明說明 氣吸進燃燒用空氣，而藉排氣循環達成減少氮氧化物的效 果，不過欲達成減少氮氧化物的效果，當然也可係其他之 構造。只是若係前述構造，就不須在燃燒用空氣供給鼓風 機40之吸引側設置排氣循環配管或排氣切換閥，可成為構 5 造簡單且價廉之設備。 又，前述實施形態中係顯示爐内溫度在燃料氣體之自 燃溫度以下時，由内管燃燒喷嘴26之第1冷卻空氣供給路 29供給預混燃料氣體而使之燃燒的情形，不過亦可由第1 燃料供給管27供給預混燃料氣體。 10 更進一步，亦可由外管燃燒喷嘴30之第2冷卻空氣供 給路33或苐2燃料供給管31供給預混燃料氣體。 發明之效果 由以上之說明可知依據申請專利範圍第丨項之發明， 燃燒方法係輪流燃燒，由於其燃燒排氣交替地通過設在内 15管内以及内管和夕卜管間之空間的蓄諸，且燃燒用空氣通 過在前述步射被加熱之蓄熱體而被預熱，故熱回收效率 可達80〜50%，且可進行節省能源和熱效率高之燃燒。此 外，由於設在内管以及内管和外管之環狀空間的燃燒喷嘴 係由中央邛喷出燃料氣體，且由其外周喷出冷卻空氣之雙 2〇層管構造者，故燃燒喷嘴不會因燃燒排氣而熱性燒毁。 又，由於2根進排氣管具有細腰型吸引管，且前述細 腰型吸引管部分係利用具有排氣排出口之旁通管連通，故 一部份之燃燒排氣被吸進由細腰型吸引管噴出之燃燒用空 氣並供給出來（自行排氣循環），因此不需排氣切換閥，同 14 200303971 玖、發明說明 時不須在燃燒用空氣供給鼓風機之吸引側設置排氣循環配 管等，而形成簡單之構造且可達成減少氮氧化物的效果。 又，依據申請專利範圍第2項之發明，由於爐内溫度 在燃料氣體之自燃溫度以下時，將預混燃料氣體供給至設 5 於外管環狀空間或内管之燃燒喷嘴中任一方而進行連續燃 燒，故即使在低爐溫時依然可進行穩定之燃燒。 【圖式簡單說明】 第1圖係本發明之單端型蓄熱式輻射管燃燒裝置的概 略圖。 10 第2圖係習知單端型輻射管燃燒器的概略圖。 第3圖係習知單端型蓄熱式輻射管燃燒器的概略圖。 【圖式之主要元件代表符號表】没 Air supply channel 33. T, respectively, in the aforementioned inner tube 22 and the first! The annular space formed between the cooling air supply tubes 28 is filled with an inner tube heat storage body in the front part, and 10% of the outer periphery of the second cooling air supply tube in the annular space 23 is filled with an outer tube heat storage body. R2. Going one step further, a first intake and exhaust pipe 24a and a second intake and exhaust pipe 24b are provided at the rear ends of the aforementioned outer pipe 21 and inner pipe 22, and the first! The second intake and exhaust pipes 24a and 24b each have a first! The second thin waist type suction pipes 3a and 34b are connected to each other by a bypass pipe 35 having a gas discharge port 36 and a gas discharge port 36. The combustion air supply blower 40 is connected to the second narrow waist type suction pipe 3 via an outer tube combustion air switching valve Vi, and is connected to the first narrow waist by switching the width of the internal combustion air. The type suction pipe 34a is connected, and at the same time, it is connected to the first through the regulating valve V3! The mixer 42 of the air supply pipe of the cooling air supply channels 20 to 29 and the second cooling air supply channel 33. As described above, the fuel gas supply source 41 is a mixer 42 which is connected to an air supply officer provided in the first cooling air supply path 29 through a pressure reducing valve v4 and an electromagnetic heating valve V6, and is also connected through a pressure reducing valve v5. The inner tube combustion fuel switching valve V? Is communicated with the first fuel supply pipe 27, and the outer tube combustion fuel switching valve Vs is communicated with the second fuel supply pipe 31 by 10 200303971 (10). Next, the operation of the single-ended thermal-storage-type radiant tube combustion device τ constructed as described above will be described. First, 'close the air switching valve for the outer tube combustion, open the air switching valve V2 for the inner tube combustion 5, open the regulating valve V3, open the temperature increasing solenoid valve ν6, and close the inner tube combustion fuel switching valve V7 and the outer tube combustion fuel switching. Valve V8, and the combustion air is supplied from the i-th intake and exhaust pipe 24a to the inner tube 22 by the i-th narrow waist suction pipe 34a and the combustion air supply blower 40, and at the same time, it is premixed by the mixer 42 The premixed fuel gas is supplied to the i-th cooling air passage 29 of the inner 10-tube combustion nozzle 26, and a pilot burner or spark plug (not shown) provided in the inner-tube combustion chamber Si is ignited, thereby igniting And combustion starts in the inner tube combustion chamber Si. Then, the combustion exhaust gas generated by the aforementioned combustion is reversed at the closed end of the outer tube 21, and flows through the annular space 23 15 formed by the inner tube 22 and the outer tube 21, and heats the external official animal hot body R2, and then It is discharged from the second intake and exhaust pipe 24 b through an exhaust exhaust port 36 provided in the bypass officer 35. At this time, a part of the exhaust gas is sucked into the combustion air due to the suction effect of the combustion air ejected from the i-th narrow-waist type suction pipe 34a, which contributes to the reduction of nitrogen oxides. As mentioned above, although the combustion exhaust gas heats the outer tube heat storage body 20, the outer tube combustion nozzle 30 is also heated, but because the predetermined amount of cold air is supplied to the outer tube combustion nozzle 3G by the regulating valve V3 Since the second cooling air supply pipe 32 prevents thermal damage to the outer tube combustion nozzle 3G and cracking of residual fuel. In addition, only the combustion system performed by the above-mentioned inner tube combustion nozzle 26 is continued until 11 200303971 发明, the temperature of the furnace reaches a predetermined temperature, for example, above the auto-ignition temperature of the fuel gas. This is because if the temperature in the furnace reaches, for example, the spontaneous combustion temperature of the fuel gas, and the fuel gas is supplied from the first fuel supply pipe 27, the fuel gas system is ejected at a high speed of, for example, about 100 m / sec. For reasons such as sufficient mixing with combustion air, combustion becomes unstable. Therefore, if the temperature in the furnace reaches a predetermined temperature, the above-mentioned inner tube combustion air switching valve% and the heating solenoid valve are closed, the outer tube combustion air switching valve Vi and the outer tube combustion fuel switching valve v8 are opened, and the second The fuel 10 supply pipe 31 supplies fuel gas that has been adjusted to a predetermined pressure, and at the same time supplies combustion air from the second intake and exhaust officer 24b, and ignites combustion by using an ignition device (not shown) provided in the outer tube combustion chamber S2. At this time, since the combustion air passes through the outer tube heat storage body R2 and is preheated in between, the stable combustion can be performed immediately. 15. In addition, the aforementioned combustion exhaust gas is reversed at the closed end of the outer tube 21, and flows through the inner tube 22 to heat the inner tube heat storage body Ri, and is then discharged through the first exhaust pipe 24a through the exhaust exhaust port 36. At this time, although the inner tube combustion nozzle 26 is heated by the high-temperature combustion exhaust gas, because the predetermined amount of cooling air is supplied to the first cooling 20 air supply path 29 by the regulating valve V3, the inner tube combustion nozzle 26 can also be prevented Thermal damage and cracking of residual fuel. After a predetermined time elapses, for example, 10 seconds, the outer tube combustion air switching valve and the outer tube combustion fuel switching valve v8 are closed, the inner tube combustion air switching valve V2 and the inner tube combustion fuel switching valve V7 are opened, Make combustion 12 200303971 发明, invention description gas from the first fuel supply pipe 27, and the combustion air that has been preheated by the inner tube heat storage body & is ejected to the heart of the inner tube combustion chamber, and is not shown in the figure. The ignition device ignites for stable combustion. After the combustion exhaust gas passes through and heats the hot animal body R2, it is discharged through the exhaust gas exhaust port 36 through the second intake and exhaust pipe 24b. At this time, although the outer tube combustion nozzle 30 is heated by the high-temperature combustion exhaust gas, since the predetermined amount of cooling air is supplied to the second cooling air supply tube 32 by the regulating valve%, the outer tube combustion nozzle 30 can also be prevented Thermal damage and cracking of residual fuel. After that, the aforementioned action is repeated every predetermined time. 10 In addition, the fuel used is not particularly limited as long as it is a gaseous fuel. Especially when using high-calorific gas such as propane gas and butane gas, because after the burner becomes weak, the flammability is improved and the afterburning can be generated when switching to alternate combustion (even if the combustion is switched to the other burner, there is still a flame present) The phenomenon of the burner on this side), so it is appropriate to use the combustion air to dilute the above-mentioned 15 'fuel and make it a diluted fuel with a low calorific value adjusted to & = 5000 ~ 10000kcal / m3N. In addition, when switching the fuel gas and combustion air during alternate combustion, of course, the opening operation of the control valve is to open the combustion air switching valve before opening the combustion fuel switching valve, and the closing operation is to close the combustion 20 first. The combustion fuel switching valve closes the combustion air switching valve. Furthermore, in the aforementioned embodiment, the first and second intake and exhaust pipes 24a and 24b are provided with slim waist type suction pipes 34a and 34b, and the slim waist type is provided by the combustion air from one of the intake and exhaust pipes. The amount of movement ejected by the suction pipe, and a part of the combustion exhaust 200303971 through the bypass pipe 35 through the inlet and exhaust pipes of the other side, the invention explains that the gas is sucked into the combustion air, and the nitrogen oxide is reduced by the exhaust cycle. Material effect, but to achieve the effect of reducing nitrogen oxides, of course, other structures can also be used. However, if it is the aforementioned structure, it is not necessary to provide an exhaust circulation pipe or an exhaust switching valve on the suction side of the combustion air supply blower 40, and it can be a simple and inexpensive device. In the foregoing embodiment, when the temperature in the furnace is below the auto-ignition temperature of the fuel gas, the pre-mixed fuel gas is supplied from the first cooling air supply path 29 of the inner tube combustion nozzle 26 and burned. 1 The fuel supply pipe 27 supplies a premixed fuel gas. 10 Furthermore, the premixed fuel gas may be supplied from the second cooling air supply path 33 of the outer tube combustion nozzle 30 or the second fuel supply tube 31. Effect of the Invention From the above description, it can be known that according to the invention in the scope of the patent application, the combustion method is rotating combustion, because the combustion exhaust gas alternately passes through the space provided in the inner 15 tube and the space between the inner tube and the night tube. Moreover, the combustion air is preheated by firing the heat storage body heated in the aforementioned step, so the heat recovery efficiency can reach 80 ~ 50%, and it can perform energy saving and high thermal efficiency combustion. In addition, since the combustion nozzles provided in the inner tube and the annular space of the inner tube and the outer tube are of a double 20-layer tube structure in which fuel gas is ejected from the center thorium and cooling air is ejected from its outer periphery, the combustion nozzle is not It will be thermally destroyed by burning exhaust gas. In addition, since the two intake and exhaust pipes have a slim waist type suction pipe, and the aforementioned slim waist type suction pipe is connected by a bypass pipe having an exhaust discharge port, a part of the combustion exhaust gas is sucked into the fine exhaust pipe. The combustion air sprayed by the waist-type suction pipe is supplied and supplied (self-exhaust circulation), so no exhaust switching valve is needed. As with 14 200303971 03, the invention does not need to set an exhaust circulation on the suction side of the combustion air supply blower The piping and the like have a simple structure and can achieve the effect of reducing nitrogen oxides. In addition, according to the invention in item 2 of the scope of patent application, since the temperature in the furnace is below the auto-ignition temperature of the fuel gas, the premixed fuel gas is supplied to any one of the combustion nozzles provided in the annular space of the outer tube or the inner tube. Continuous combustion is performed, so stable combustion can be performed even at low furnace temperatures. [Brief description of the drawings] Fig. 1 is a schematic diagram of a single-ended thermal storage type radiant tube combustion device of the present invention. 10 Figure 2 is a schematic diagram of a conventional single-ended radiant tube burner. Fig. 3 is a schematic diagram of a conventional single-ended regenerative radiant tube burner. [Representative symbol table for main elements of the diagram]
1，10,21"·夕卜管 18...外管燃料喷嘴 2，11，22·.·内管 20...單端輻射管 3…燃燒用空氣供給管 24a...第1進排氣管 4...燃料氣體供給管 24b...第2進排氣管 5，16···通路 26...内管燃燒喷嘴 6...燃燒室 27···第1燃料供給管 7,23…環狀空間 28...第1冷卻空氣供給管 12，R2...外管蓄熱體 29··.第1冷卻空氣供給路 13，R1·.·内管蓄熱體 30...外管燃燒噴嘴 14,40…燃燒用空氣供給鼓風機 31…第2燃料供給管 15…排氣鼓風機 32·.·第2冷卻空氣供給管 17...内管燃料喷嘴 33···第2冷卻空氣供給路 15 200303971 玖、發明說明 34a...第1細腰型吸引管 34b···第2細腰型吸引管 35.. .旁通管 36…排氣排出口 41…燃料氣體供給源 42…混合器 51.. .内管燃燒室 52.. .外管燃燒室 T，T2蓄熱溯麵継 乃…單端型輻射管燃燒裝置 V···切換閥 VI...外管燃燒用空氣切換閥 V2...内管燃燒用空氣切換閥 V3...調節閥 V4，V5…減壓閥 V6...昇溫用電磁閥 V7...内管燃燒用燃料切換閥 V8...外管燃燒用燃料切換閥1,10,21 " · Xibu tube 18 ... outer tube fuel nozzle 2,11,22 ·. · Inner tube 20 ... single-ended radiant tube 3 ... combustion air supply tube 24a ... 1st inlet Exhaust pipe 4 ... Fuel gas supply pipe 24b ... Second intake and exhaust pipe 5,16 ... passage 26 ... Inner tube combustion nozzle 6 ... Combustion chamber 27 ... First fuel supply The tubes 7, 23 ... annulus 28 ... the first cooling air supply pipe 12, R2 ... the outer tube heat storage body 29 ... The first cooling air supply path 13, R1 ... the inner tube heat storage body 30. .. outer tube combustion nozzles 14, 40 ... combustion air supply blower 31 ... second fuel supply tube 15 ... exhaust blower 32 ... second cooling air supply tube 17 ... inner tube fuel nozzle 33 ... 2 Cooling air supply path 15 200303971 玖, Description of the invention 34a ... First narrow waist suction pipe 34b ... Second narrow waist suction pipe 35 ... Bypass pipe 36 ... Exhaust outlet 41 ... Fuel gas Supply source 42… Mixer 51 .. Inner tube combustion chamber 52 .. Outer tube combustion chamber T, T2 Heat storage traceability 継 is… Single-ended radiant tube combustion device V ··· Switch valve VI ... Outer tube Combustion air switching valve V2 ... Inner tube combustion air switching valve V3 ... Section valves V4, V5 ... ... raised relief valve V6 V7 ... electromagnetic valve tube within the combustor fuel control valve V8 ... outer tube burner fuel selector valve