201043878 六、發明說明： 【潑^明戶斤屬之^支袖^領遍^】 發明領域 本發明係有關於一種蓄熱式燃燒裝置（regenerative burner) ’特別是有關於一種可進行燃燒器之縮減運轉之蓄 熱式燃燒裝置。 t 才支名好】 發明背景 已知有一種蓄熱式燃燒裝置（蓄熱式燃燒器），其係於空 氣流路具有具蓄熱體之燃燒器對，其中一燃燒器之燃燒氣 體藉由另一燃燒器排氣，而使蓄熱體回收熱，即使蓄熱體 之溫度上升，仍切換要燃燒之燃燒器及從排氣回收熱之燃 燒器。 再者，亦為眾所周知之一種燃燒裝置係具有複數對燃 燒器，可依需要之熱量，將一部份燃燒器對在不進行燃燒， 也不進行熱回收下，停歇而運轉(縮減運轉)者。在進行縮減 運轉之燃燒裝置中，各燃燒器之空氣流路分別藉由閥連接 於共通之供給流路（集管）及共通之排氣流路。停歇中之燃燒 器之空氣流路之閥的供氣側及排氣側皆關閉。 由於燃燒器之燃燒氣體最後經由煙囪，排出至外部， 故對各燃燒器之排氣側之閥施加煙国效果之吸引壓力。設 於空氣流路之閥因需要耐受因反覆之溫度變化引起之金屬 零件的熱伸縮，故並不易提高氣密性。因此，因排氣之吸 引壓力，於閥產生漏氣，少量之燃燒氣體通過停歇中之燃 201043878 燒器之空氣流路。此燃燒氣體之熱最初為蓄熱體所吸收， 而當蓄熱體之溫度因吸熱而上升時，高溫之氣體通過蓄熱 體，而使包含閥之排氣流路側之空氣流路内的溫度逐漸上 升0 由於燃燒器呈燃燒狀態時，可供給溫度低之燃燒空 氣，故空氣流路可冷卻，而當燃燒器呈停歇狀態時，因上 述作用，空氣流路之溫度漸漸持續上升，而有用以保持蓄201043878 VI. INSTRUCTIONS: [Splashing of the singularity of the singularity of the singularity of the singularity of the singularity of the singularity] The present invention relates to a regenerative burner (especially related to a reduction of a burner) A regenerative combustion unit that operates. BACKGROUND OF THE INVENTION There is known a regenerative combustion device (regenerative burner) having a burner pair having a regenerator in an air flow path, wherein a combustion gas of one burner is burned by another The exhaust gas is exhausted, and the heat storage body recovers heat, and even if the temperature of the heat storage body rises, the burner to be combusted and the burner that recovers heat from the exhaust gas are switched. Furthermore, it is also known that a combustion device has a plurality of burners, and a part of the burners can be operated without stopping (heat reduction) without stopping the heat according to the required heat. . In the combustion apparatus in which the reduction operation is performed, the air flow paths of the respective burners are connected to the common supply flow path (collector) and the common exhaust flow path by valves. Both the air supply side and the exhaust side of the valve of the air flow path of the burner in the stop are closed. Since the combustion gas of the burner is finally discharged to the outside via the chimney, the suction pressure of the smoke country effect is applied to the valve on the exhaust side of each burner. Since the valve provided in the air flow path is required to withstand the thermal expansion and contraction of the metal parts due to the repeated temperature change, it is not easy to improve the airtightness. Therefore, due to the suction pressure of the exhaust gas, a leak occurs in the valve, and a small amount of combustion gas passes through the air flow path of the burning burner in 201043878. The heat of the combustion gas is initially absorbed by the heat storage body, and when the temperature of the heat storage body rises due to heat absorption, the high temperature gas passes through the heat storage body, and the temperature in the air flow path on the side of the exhaust gas flow path including the valve gradually rises. Since the burner is in a combustion state, the combustion air having a low temperature can be supplied, so that the air flow path can be cooled, and when the burner is in a resting state, the temperature of the air flow path gradually rises due to the above action, and is useful to keep the storage.
熱體之網狀支撐構件損傷，蓄熱體脫落，或閥曝露於高溫 而損傷之危險性。是故，在習知之燃燒裝置中，監視停歇 中之燃燒器之空氣流路的溫度，於空氣流路之溫度達上限 溫度以上時，判斷為危險狀態，而緊急停止燃燒裝置全體。 亦即，在習知燃燒裝置中，無法長期之縮減運轉，當 達到緊急停止時，加熱處理中之製品便徒勞無用，而有對 生產造成阻礙之問題。特別是於排氣使用風扇之燃燒裝 置通過停歇中之燃燒器之空氣流路之燃燒氣體增多，而 無法長時間之運轉。 在專利文獻ιπ己載之燃燒裝置中，藉將停歇中之燃燒器 之供氣側之閥稱微開啟，而將少量之空氣供給至空:流 路，可將蓄熱體或排氣側之閥冷卻，而防止因職氣體之 進入引起之閥或其他構成要件的過熱。 中之燃燒器之過熱，需從供氣惻之閥 側閥之，漏量以上的空氣。_ /里|大’自考慮爐溫或其他運轉條件之變化等時， 要配合閥之_，調節供給至停歇中之閥之空氣量便極 201043878 為困難。當供氣側之空氣供給量少時，排氣側之閥之冷卻 不足，而無法防止排氣側之閥之損傷。又，由於當供氣側 之空氣供給量多時，超過排氣側之閥之洩漏量之量的常溫 空氣全進入至爐内，而使爐内之溫度部份降低，故成為使 爐内之溫度分布惡化之原因。 先行技術文獻 專利文獻 專利文獻1 日本專利公開公報平8-35624號 【發明内容】 發明概要 發明欲解決之課題 鑑於前述問題點，本發明之課題係提供具有複數個蓄 熱式燃燒器，可藉供氣防止因燃燒氣體進入停歇中之燃燒 器而引起之裝置損傷，並且不對裝置之溫度條件造成不良 影響之燃燒裝置。 用以欲解決課題之手段 為解決前述課題，本發明之蓄熱式燃燒裝置包含有複 數個燃燒器，該複數個燃燒器分別具有具有蓄熱體之空氣 流路、用以連接前述空氣流路與燃燒空氣之供氣流路之供 氣閥及用以連接前述空氣流路與用以將燃燒氣體排氣之排 氣流路之排氣閥；又，該蓄熱式燃燒裝置將前述燃燒器之 一部份停歇而運轉，當停歇中之前述燃燒器之前述空氣流 路的前述蓄熱體與前述排氣閥間之氣體溫度達預定溫度以 上時，可開啟該燃燒器之前述供氣閥。 201043878 根據此結果，因排氣閥之洩漏，燃燒氣體通過停歇中 之燃燒器，蓄熱體未完全吸收燃燒氣體之熱，僅於排氣閥 側之氣體溫度達高溫時，將供氣閥開啟，將空氣導入至空 氣流路，而冷卻蓄熱體及閥。因此，由於在蓄熱體可吸收 燃燒氣體之溫度之期間，不導入空氣，而逐次導入用以防 止空氣流路之過多溫度上升之必要最小限度的空氣，故可 防止空氣流路過度升溫，並且不使燃燒溫度之偏差或熱效 率之惡化產生。 又，本發明之蓄熱式燃燒裝置亦可依前述空氣流路之 前述蓄熱體與前述排氣閥間之氣體溫度，使停歇中之前述 燃燒器之前述供氣閥之開啟度改變。 根據此結構，由於空氣流路之溫度越高，可導入越多 量之空氣來冷卻，故可確實地防止空氣流路之過熱。 又，本發明之蓄熱式燃燒裝置亦可於前述空氣流路之 前述蓄熱體與前述排氣閥間之裝置溫度達預定溫度以上 時，開啟該燃燒器之前述供氣閥。 根據此結構，藉監視熱容量大，無法因空氣之導入而 立刻冷卻之裝置之構成要件的溫度，導入空氣，而可確實 地防止裝置之異常過熱。 又，根據本發明，包含有分別具有具有蓄熱體之空氣 流路、用以連接前述空氣流路與燃燒空氣之供氣流路之供 氣閥及用以連接前述空氣流路與用以將燃燒氣體排氣之排 氣流路之排氣閥的複數個燃燒器之蓄熱式燃燒裝置之運轉 方法係將前述燃燒器之一部份停歇而運轉，當停歇中之前 7 201043878 之別述空氣流路的前述蓄熱體與前述排氣閥間之 孔體恤度達預定溫度以上時，將該燃燒器之前述供氣閥開 啟。 發明效果 μ根據本發明，由於在蓄熱體可吸收燃燒氣體之溫度之 』門^導人空氣’而監視空氣流路之溫度，並且僅於溫 又j升t開啟供氣閥，導入冷卻所需最小限度之空氣， ，在不使爐内之溫度分布惡化下，保護排氣閥及用以保 件等之空氣流路的構成要件免於損傷，即使 長時間縮減運轉’燃燒裝置亦不致緊急停止。 圖式簡單說明 第1圖係本發明第1實施形態之蓄熱式燃燒裝置之概略 結構圖。 第2圖係本發明第2實施形態之蓄熱式燃燒裝置之燃燒 器的結構圖。 C ίΓ方包】 用以實施發明之形態 接著’ 一面參照圖式，一面就本發明之實施形態作說 明。第1圖顯示為本發明第1實施形態之蓄熱式燃燒裝置之 連續加熱爐的結構。此連續加熱爐係於供長尺狀鋼材通過 之爐體1設複數個燃燒器2，而用以將鋼材連續熱處理者。 各燃燒器2具有用以喷射燃料及燃燒空氣之喷嘴部3、 用以從共通之供氣流路4將燃燒空氣供給至喷嘴13之空氣 流路。在空氣流路，於噴嘴部3之附近設有蓄熱體5，藉由 201043878 供氣閥6連接於供氣流路4。又，空氣流路係藉由排氣閥7， 連接於與圖中未示之煙_連接之共通之排氣流路8,藉將供 氣閥6關閉，並將排氣閥7開啟，可作為用以將爐體〖内之燃 燒氣體排氣之流路。此外，在本實施形態中，排氣流路連 接於煙囪，亦可為以排氣風扇強制排氣者。 又，於各燃燒器2之空氣流路之蓄熱體5與排氣閥7間設 有用以檢測内部之氣體(從供氣流路4供給之空氣及從爐體 1藉由燃燒器2排出之燃燒氣體）之溫度的氣體溫度感測器 9。爐體1内以有開孔之分隔壁區分為用以預熱鋼材之預熱 帶10及用以將鋼材加熱至處理溫度之加熱帶11。 在此蓄熱式燃燒裝置，設置於爐體1之對面之燃燒器2 構成組，一面每隔一定時間切換燃燒及排氣（熱回收）而運 轉，一面使爐體1内之溫度上升。由於當爐體1内之溫度接 近設定值時，便不需要爐體1之升溫，故要以燃燒器2之燃 燒供給之熱量減少。是故，可減少各燃燒器2之燃料及空氣 燃料而降載(縮載燃燒），由於燃燒器2在額定熱量之10%以 下便無法降載，故此時，需停歇(縮減)燃燒器2之組之燃燒/ 排氣運轉。 在要燃燒之燃燒器2，藉關閉排氣閥7，開啟供氣閥6， 而藉由蓄熱體5，將燃燒空氣供給至嘴嘴部3，藉從圖中未 示之燃料喷射口喷射燃料，而形成火焰。在要熱回收之燃 燒器2，藉關閉供氣閥6 ’開啟排氣閥7，可藉由蓄熱體5， 將爐體1内之燃燒氣體排氣。此時，蓄熱體5取出燃燒氣體 之熱而升溫，而於下次燃燒時，以儲存於蓄熱體之熱將燃 9 201043878 燒空氣預熱。 停歇中之燃燒器2原則上將供氣閥6及排氣閥7皆關 閉，而防止燃燒空氣及燃燒氣體之通過。然而，由於排氣 閥7特別需耐受因燃燒氣體而反覆溫度變化引起之金屬零 件的熱伸縮，故無法使用氣密性高者。排氣流路8因煙囪效 果，而具有吸引壓力，因排氣閥7之洩漏，而吸出些微燃燒 器2之空氣流路内之氣體。因此，爐體1内之燃燒氣體以與 排氣閥7之洩漏量相同之量流入至停歇中之燃燒器2。 連續加熱爐之縮減運轉開始最初由於流入至停歇中 之燃燒器2之燃燒氣體之熱能為蓄熱體5所取出’故溫度已 降低之燃燒氣體經由排氣閥7而被吸引。然而’當縮減運轉 時間增長時，停歇中之燃燒器2之蓄熱體5之溫度上升，直 接以高溫狀態通過蓄熱體5之燃燒氣體7藉由排氣閥7而漏 出。 氣體溫度感測器9檢測通過蓄熱體5之燃燒氣體之溫 度。舉例言之，當排氣閥7之耐熱溫度為350°C時，若氣體 溫度感測器9之檢測溫度超過300°C，便令該燃燒器2之供氣 閥6為全開。如此一來，可從供氣流路4供給常溫之空氣， 而將空氣流路内冷卻。又，若氣體溫度感測器9之檢測溫度 達250°C以下，此燃燒器2便將供氣閥6封閉，而遮斷空氣之 導入。 因從供氣流路4流入之空氣將空氣流路冷卻’從排氣閥 7洩漏至排氣流路8，而可將排氣閥7冷卻。超過排氣閥7之 洩漏量之空氣係藉由蓄熱體5而流入至爐體1，通過蓄熱體5 10 201043878 之際，從蓄熱體5接收熱，升溫至與爐體1内部之燃燒氣體 幾乎相同之溫度後，進入至爐體1。因此，藉由此停歇中之 燃燒器2之供氣閥6而導入之空氣不致導致爐體1内之溫度 降低。 又，由於可藉此空氣之導入，冷卻蓄熱體5，故即使封 閉供氣閥6，仍回復至可使通過之燃燒氣體充分降低之狀 態、亦即，可防止排氣閥7等構成要件因熱損傷之狀態。是 故’若氣體溫度感測器9之檢測溫度降低至250°C以下，便 封閉供氣閥6。藉此，可防止蓄熱體5之溫度過低，而將冷 空氣導入至爐體1。 又，燃燒器2於氣體溫度檢測器9之檢測溫度超過30(TC 時’由於當在如此過熱之狀態下，開始運轉燃燒，會有危 險，故亦可持續發報警報器，而警告不將該燃燒器2運轉燃 燒。 又，在本實施形態中，亦可令供氣閥6為可調節開啟度 者’而依該氣體溫度檢測器9之檢測溫度，調節供氣閥6之 開啟度。舉例言之，若氣體溫度檢測器9之檢測溫度為250 °C以下時，可令供氣閥6為全閉，若氣體溫度感測器9之檢 測溫度超過25〇。〇，在30(TC以下時，可令供氣閥6為半開 (50%開啟度），若氣體溫度感測器9之檢測溫度超過300°C ’ 可令供氣閥6為全開。 接著’於第2圖顯示本發明第2實施形態之燃燒裝置之 燃燒器2丨。燃燒器21與第1實施形態同樣地於同一爐體22並 列設有複數個，而在圖中僅顯示1個 11 201043878 燃燒器21以安裝於爐體22之開口之噴嘴部幻、安裝於喷 嘴部23之下方之蓄熱H24、㈣連接供氣流路及排氣流路之 管路，構成可作為將燃燒空氣供給至爐體22之流路，也可 作為用以將爐體22内之燃燒氣體排氣之流路的空氣流路。 當然’燃燒器21亦具有圖中未示之燃料喷嘴及點火機構。 蓄熱器24於網狀之支撑構件25上填充有粒狀蓄熱體 26，並具有用以檢測支撐構件之框架部份之溫度的支撐構 件溫度感測器27。 燃燒器21之空氣流路藉由停止閥2 8及流量調節閥（供 氣閥）29將蓄熱器24與供氣流路連接，為檢測從供氣流路供 給之空氣之流量，而具有由孔口流量計構成之空氣流量計 30。又，空氣流路藉由排氣器31將蓄熱器24與排氣流路連 接。再者，空氣流路具有用以檢測蓄熱器24與停止閥28及 流量調節閥2 9間之氣體溫度之氣體溫度感測器3 2。 再者，此燃燒器21具有於運轉燃燒之際，依據空氣流 量計30之檢測值，調節流量調節閥29之開啟度，而將從供 氣流路供給之空氣流量維持在設定流量之流量控制裝置 33。流量控制裝置33於該燃燒器21停歇之期間，依氣體溫 度感測H32及切構件溫度感測肪之制溫度，調整流 量調節閥29之開啟度。 由於在燃燒器21中’在令流量調節閥29為全閉之狀態 下’氣體度感剩器32檢測通過蓄熱體26之燃燒氣體之溫 度’故氣體溫度感測器32之檢測溫度與蓄熱體之溫度之關 聯南。然而’由於在將流量調節閥29開啟，從供氣流路供 12 201043878 給空氣之狀態下，氣體溫度感測器32檢測進入蓄熱體^前 之空氣之溫度，故氣體溫度感測器32之檢測溫度與蓄敎體 26之溫度之關聯低。 、 在本實施形態中，支撐構件25有當溫度過高時，孔打 開，岐蓄熱體26落下之危險性。因此，當僅以氣體溫度 感測器32之檢測溫度為基礎，控制流量調節間鹏，雖可 防止排氣閥31之過熱，但無法防止因支撐構件25之過熱損 傷引起之蓄熱體26之漏出。 ' 0 {故，本實施形態之燃燒器仙支樓構件溫度感測器 27檢測支撐構件25之溫度，於支撐構件私溫度升高時， 也可將流量調節閥29開放，而冷卻支撐構件25及蓄熱體％。 具體s之，如下列表1所示’流量控制農置33依氣體溫 度感測器32之檢測值及支撐構件溫度感測器27之檢測值， 分別決定流量調節閥29之開啟度，而將該等中較大之開啟 度應用作為實際之流量調節閥29之開啟度。 氣體溫度 支撐構件溫度 流量調節閥開啟度 250°C以下 3〇0°C以下 0% 超過250°C、300°C以下 超過300°C、350。〇以下 50% 超過300°C 超過350°g 100% 在本實施形態，以支撐構件溫度感測器27檢測支撐構 件25之溫度，而為保護設置於蓄熱體26與排氣閥31間之其 他構成要件，可檢測欲保護之構成要件或其附近之構成要 件之溫度是無須贅言的。 13 201043878 I：圖式簡單說明3 第1圖係本發明第1實施形態之蓄熱式燃燒裝置之概略 結構圖。 第2圖係本發明第2實施形態之蓄熱式燃燒裝置之燃燒 器的結構圖。 【主要元件符號說明】 1，22…爐體 10...預熱帶 2,21...燃燒器 11...加熱帶 3,23...喷嘴部 24..·蓄熱器 4...供氣流路 25...支撐構件 5,26...蓄熱體 27...支撐構件溫度感測器 6...供氣閥 28...停止閥 7,31...排氣閥 29…流量調節閥 8...排氣流路 30...空氣流量計 9,32...氣體溫度感測器 33...流量控制裝置 14The mesh support member of the thermal body is damaged, the regenerator is detached, or the valve is exposed to high temperature and the risk of damage. Therefore, in the conventional combustion apparatus, the temperature of the air flow path of the burner in the stop is monitored, and when the temperature of the air flow path reaches the upper limit temperature or higher, it is judged to be in a dangerous state, and the entire combustion apparatus is urgently stopped. That is, in the conventional combustion apparatus, the operation cannot be reduced for a long period of time, and when the emergency stop is reached, the product in the heat treatment is useless, and there is a problem that the production is hindered. In particular, in a combustion apparatus using a fan for exhaust gas, the combustion gas of the air flow path of the burner in the stop is increased, and it is impossible to operate for a long time. In the combustion device of the patent document ιπ, the valve on the gas supply side of the burner in the stop is slightly opened, and a small amount of air is supplied to the air: flow path, and the valve of the heat storage body or the exhaust side can be used. Cooling to prevent overheating of valves or other components caused by the entry of gaseous gases. In the overheating of the burner, the air from the valve side valve of the air supply valve is required. _ / Li | Large ' When considering the change of furnace temperature or other operating conditions, etc., it is difficult to adjust the amount of air supplied to the valve in the stop to meet the valve _ _ 201043878. When the air supply amount on the air supply side is small, the cooling of the valve on the exhaust side is insufficient, and the damage of the valve on the exhaust side cannot be prevented. In addition, when the amount of air supplied to the air supply side is large, the amount of normal temperature air exceeding the amount of leakage of the valve on the exhaust side enters the furnace, and the temperature in the furnace is partially lowered, so that the inside of the furnace is made The cause of the deterioration of the temperature distribution. SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION In view of the foregoing problems, the subject of the present invention is to provide a plurality of regenerative burners that can be borrowed The gas prevents the damage of the device caused by the combustion gas entering the burner in the stop, and does not adversely affect the temperature conditions of the device. Means for Solving the Problem In order to solve the above problems, the regenerative combustion apparatus of the present invention includes a plurality of burners each having an air flow path having a heat storage body for connecting the air flow path and combustion a gas supply valve for supplying air to the air and an exhaust valve for connecting the air flow path and an exhaust flow path for exhausting the combustion gas; and the regenerative combustion device is a part of the burner When the gas temperature between the heat storage body and the exhaust valve of the air flow path of the burner in the stop is at a predetermined temperature or higher, the gas supply valve of the burner can be opened. According to this result, due to the leakage of the exhaust valve, the combustion gas passes through the burner in the stop, the heat storage body does not completely absorb the heat of the combustion gas, and the gas supply valve is opened only when the temperature of the gas on the exhaust valve side reaches a high temperature. The air is introduced into the air flow path to cool the regenerator and the valve. Therefore, since air is not introduced during the period in which the heat accumulating body can absorb the combustion gas, air which is necessary to prevent excessive temperature rise of the air flow path is introduced in order, so that the air flow path can be prevented from being excessively heated, and Deterioration of combustion temperature or deterioration of thermal efficiency occurs. Further, in the regenerative combustion apparatus of the present invention, the degree of opening of the air supply valve of the burner during the stop may be changed depending on the temperature of the gas between the heat storage body and the exhaust valve of the air flow path. According to this configuration, since the higher the temperature of the air flow path, the more air can be introduced for cooling, the overheating of the air flow path can be surely prevented. Further, in the regenerative combustion apparatus of the present invention, the supply valve of the burner may be opened when the temperature of the device between the heat storage body and the exhaust valve of the air flow path reaches a predetermined temperature or higher. According to this configuration, it is possible to reliably prevent abnormal overheating of the device by monitoring the temperature of the constituent elements of the device which is not immediately cooled by the introduction of air by the monitoring heat capacity. Further, according to the present invention, there are provided an air supply valve having an air flow path having a heat storage body, an air supply path for connecting the air flow path and the combustion air, and a gas flow path for connecting the air flow path and the combustion gas The operation method of the regenerative combustion device of the plurality of burners of the exhaust valve of the exhaust gas flow path is to stop one part of the burner and operate, and before the stop, the air flow path of 7 201043878 When the hole between the heat storage body and the exhaust valve reaches a predetermined temperature or higher, the air supply valve of the burner is opened. Advantageous Effects of Invention According to the present invention, since the temperature of the air flow path is monitored by the heat storage body absorbing the temperature of the combustion gas, and the air supply valve is opened only at a temperature of j liter, the cooling is required. The minimum air, without deteriorating the temperature distribution in the furnace, protects the components of the exhaust valve and the air flow path for the maintenance, etc. from damage, even if the operation is reduced for a long time, the combustion device does not stop urgently. . BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic block diagram of a regenerative combustion apparatus according to a first embodiment of the present invention. Fig. 2 is a view showing the configuration of a burner of a regenerative combustion apparatus according to a second embodiment of the present invention. C Γ Γ 】 】 】 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 Fig. 1 is a view showing the configuration of a continuous heating furnace of a regenerative combustion apparatus according to a first embodiment of the present invention. This continuous heating furnace is provided with a plurality of burners 2 for the furnace body 1 through which the long-length steel is passed, and is used for continuously heat-treating the steel material. Each of the burners 2 has a nozzle portion 3 for injecting fuel and combustion air, and an air flow path for supplying combustion air from the common supply air passage 4 to the nozzle 13. In the air flow path, a heat storage body 5 is provided in the vicinity of the nozzle unit 3, and the air supply valve 6 is connected to the air supply path 4 by 201043878. Further, the air flow path is connected to the exhaust flow path 8 common to the smoke-not shown in the figure by the exhaust valve 7, and the air supply valve 6 is closed, and the exhaust valve 7 is opened. As a flow path for exhausting the combustion gas inside the furnace body. Further, in the present embodiment, the exhaust flow path is connected to the chimney, and the exhaust fan may be forced to exhaust. Further, between the heat storage body 5 of the air flow path of each of the burners 2 and the exhaust valve 7, a gas for detecting the inside (the air supplied from the air supply path 4 and the combustion from the furnace body 1 through the burner 2) is provided. Gas temperature sensor 9 for the temperature of the gas). The furnace body 1 is divided into a preheating zone 10 for preheating the steel material and a heating belt 11 for heating the steel material to the treatment temperature by a partition wall having an opening. In the regenerative combustion apparatus, the burners 2 disposed opposite the furnace body 1 constitute a group, and the combustion and exhaust (heat recovery) are switched and operated at regular intervals to increase the temperature in the furnace body 1. Since the temperature rise of the furnace body 1 is not required when the temperature in the furnace body 1 approaches the set value, the amount of heat supplied by the combustion of the burner 2 is reduced. Therefore, the fuel and air fuel of each burner 2 can be reduced and the load can be reduced (contracted combustion). Since the burner 2 cannot be loaded under 10% of the rated heat, it is necessary to stop (reduced) the burner 2 at this time. Group of combustion / exhaust operation. In the burner 2 to be burned, the gas supply valve 6 is opened by closing the exhaust valve 7, and the combustion air is supplied to the nozzle portion 3 by the heat storage body 5, and the fuel is injected from the fuel injection port not shown. And form a flame. In the burner 2 to be heat-recovered, the exhaust valve 7 is opened by closing the air supply valve 6', and the combustion gas in the furnace body 1 can be exhausted by the heat storage body 5. At this time, the heat storage body 5 takes out the heat of the combustion gas and raises the temperature, and at the time of the next combustion, the heat stored in the heat storage body preheats the air. The burner 2 in the rest stops the supply valve 6 and the exhaust valve 7 in principle, and prevents the passage of combustion air and combustion gas. However, since the exhaust valve 7 is particularly resistant to thermal expansion and contraction of the metal parts caused by the change in temperature due to the combustion gas, it is not possible to use a gastight one. The exhaust gas flow path 8 has a suction pressure due to the effect of the chimney, and the gas in the air flow path of the micro-combustor 2 is sucked out due to the leakage of the exhaust valve 7. Therefore, the combustion gas in the furnace body 1 flows into the burner 2 which is in the stop in the same amount as the leakage amount of the exhaust valve 7. At the beginning of the reduction operation of the continuous heating furnace, the heat of the combustion gas flowing into the burner 2 in the stopped state is first taken out by the heat storage body 5, so that the combustion gas whose temperature has been lowered is sucked through the exhaust valve 7. However, when the reduction in the operation time is increased, the temperature of the regenerator 5 of the burner 2 in the stop rises, and the combustion gas 7 which has passed through the regenerator 5 at a high temperature is leaked through the exhaust valve 7. The gas temperature sensor 9 detects the temperature of the combustion gas passing through the heat storage body 5. For example, when the heat-resistant temperature of the exhaust valve 7 is 350 ° C, if the detected temperature of the gas temperature sensor 9 exceeds 300 ° C, the gas supply valve 6 of the burner 2 is fully opened. In this way, the air at the normal temperature can be supplied from the supply air passage 4, and the air passage can be cooled. Further, if the detected temperature of the gas temperature sensor 9 is 250 ° C or less, the burner 2 closes the air supply valve 6 and blocks the introduction of air. The air flow path is cooled by the air flowing in from the air supply path 4, and leaks from the exhaust valve 7 to the exhaust flow path 8, whereby the exhaust valve 7 can be cooled. The air that has exceeded the leakage amount of the exhaust valve 7 flows into the furnace body 1 through the heat storage body 5, and receives heat from the heat storage body 5 through the heat storage body 5 10 201043878, and is heated to almost the combustion gas inside the furnace body 1. After the same temperature, it enters the furnace body 1. Therefore, the air introduced by the air supply valve 6 of the burner 2 in this stop does not cause the temperature inside the furnace body 1 to decrease. Further, since the heat storage body 5 can be cooled by the introduction of the air, even if the air supply valve 6 is closed, the combustion gas can be sufficiently reduced, that is, the exhaust valve 7 and the like can be prevented from being formed. The state of thermal damage. Therefore, if the detected temperature of the gas temperature sensor 9 is lowered to 250 ° C or lower, the air supply valve 6 is closed. Thereby, the temperature of the heat storage body 5 can be prevented from being too low, and the cold air can be introduced into the furnace body 1. Moreover, when the detected temperature of the burner 2 in the gas temperature detector 9 exceeds 30 (TC's time, since it is dangerous to start the combustion when it is in such a superheated state, the alarm can be continuously issued, and the warning is not to be The burner 2 is operated to burn. Further, in the present embodiment, the supply valve 6 may be an adjustable opening degree, and the opening degree of the air supply valve 6 may be adjusted according to the detected temperature of the gas temperature detector 9. In other words, if the detection temperature of the gas temperature detector 9 is 250 ° C or less, the gas supply valve 6 can be fully closed, if the detection temperature of the gas temperature sensor 9 exceeds 25 〇, 〇, below 30 (TC) When the air supply valve 6 is half-open (50% open), if the detected temperature of the gas temperature sensor 9 exceeds 300 ° C ', the air supply valve 6 can be fully opened. Next, the present invention is shown in FIG. In the burner 2 of the combustion apparatus according to the second embodiment, the burner 21 is provided in parallel with the same furnace body 22 in the same manner as in the first embodiment, and only one 11 201043878 burner 21 is shown in the figure for mounting. The nozzle of the opening of the furnace body 22 is phantom and is mounted below the nozzle portion 23 The heat H24 and (4) are connected to the air supply path and the exhaust flow path to form a flow path for supplying combustion air to the furnace body 22, or as a flow path for exhausting the combustion gas in the furnace body 22. The air flow path of course. The burner 21 also has a fuel nozzle and an ignition mechanism (not shown). The heat accumulator 24 is filled with a granular heat storage body 26 on the mesh-shaped support member 25, and has a function for detecting the support member. The support member temperature sensor 27 of the temperature of the frame portion. The air flow path of the burner 21 connects the heat accumulator 24 to the supply air flow path through the stop valve 28 and the flow regulating valve (supply valve) 29 for detecting The flow rate of the air supplied from the air flow path has an air flow meter 30 composed of an orifice flow meter. Further, the air flow path connects the heat accumulator 24 to the exhaust flow path by the exhauster 31. Further, the air flow The road has a gas temperature sensor 3 2 for detecting the gas temperature between the heat accumulator 24 and the stop valve 28 and the flow regulating valve 29. Further, the burner 21 has an air flow meter 30 in operation combustion. The detected value adjusts the opening of the flow regulating valve 29 The flow rate control device 33 maintains the flow rate of the air supplied from the supply air flow path at the set flow rate. The flow rate control device 33 senses the temperature of the H32 and the temperature of the cutting member during the period in which the burner 21 is stopped. The temperature is adjusted to adjust the degree of opening of the flow regulating valve 29. Since the gas in the burner 21 is in a state where the flow regulating valve 29 is fully closed, the gas sensing residual unit 32 detects the temperature of the combustion gas passing through the heat accumulator 26. The detected temperature of the temperature sensor 32 is associated with the temperature of the regenerator. However, since the flow regulating valve 29 is opened and the air is supplied from the air supply path 12 201043878, the gas temperature sensor 32 detects the heat storage. The temperature of the air before the body is low, so the correlation between the detected temperature of the gas temperature sensor 32 and the temperature of the storage body 26 is low. In the present embodiment, when the temperature is too high, the support member 25 has a risk that the hole is opened and the heat storage body 26 is dropped. Therefore, when the flow rate adjustment is controlled based only on the detected temperature of the gas temperature sensor 32, although the overheating of the exhaust valve 31 can be prevented, the leakage of the heat accumulator 26 due to the overheating damage of the support member 25 cannot be prevented. . Therefore, the burner scepter member temperature sensor 27 of the present embodiment detects the temperature of the support member 25, and when the private temperature of the support member increases, the flow rate adjusting valve 29 can also be opened, and the cooling support member 25 can be cooled. And the heat storage body%. Specifically, as shown in the following Table 1, the flow control farm 33 determines the opening degree of the flow regulating valve 29 according to the detected value of the gas temperature sensor 32 and the detected value of the support member temperature sensor 27, respectively. The larger opening degree is applied as the opening degree of the actual flow regulating valve 29. Gas temperature Support member temperature Flow control valve opening degree 250°C or less 3〇0°C or less 0% More than 250°C, 300°C or less More than 300°C, 350. 〇50% more than 300°C, more than 350°g, 100%. In the present embodiment, the temperature of the support member 25 is detected by the support member temperature sensor 27, and the other is disposed between the heat storage body 26 and the exhaust valve 31. It is needless to say that the temperature of the constituent elements to be protected or the constituent elements in the vicinity thereof can be detected. 13 201043878 I: BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration diagram of a regenerative combustion apparatus according to a first embodiment of the present invention. Fig. 2 is a view showing the configuration of a burner of a regenerative combustion apparatus according to a second embodiment of the present invention. [Description of main component symbols] 1,22...furnace 10...pre-tropical 2,21...burner 11...heating belt 3,23...nozzle section 24..·regenerator 4... Supply air flow path 25... support member 5, 26... heat storage body 27... support member temperature sensor 6... air supply valve 28... stop valve 7, 31... exhaust valve 29 ...flow regulating valve 8...exhaust flow path 30...air flow meter 9,32...gas temperature sensor 33...flow control device 14