TWI510745B - Exhaust gas cleanup device and temperature control method thereof - Google Patents
Exhaust gas cleanup device and temperature control method thereof Download PDFInfo
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- TWI510745B TWI510745B TW100136016A TW100136016A TWI510745B TW I510745 B TWI510745 B TW I510745B TW 100136016 A TW100136016 A TW 100136016A TW 100136016 A TW100136016 A TW 100136016A TW I510745 B TWI510745 B TW I510745B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
- F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
- F23G7/066—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator
- F23G7/068—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator using regenerative heat recovery means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/50—Control or safety arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
- Control Of Combustion (AREA)
- Regulation And Control Of Combustion (AREA)
- Air Supply (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Description
本發明係有關於一種進行含有可燃性有害成分的排氣之淨化處理的排氣淨化裝置及其溫度控制方法。The present invention relates to an exhaust gas purifying apparatus for performing purification treatment of exhaust gas containing a combustible harmful component and a temperature control method therefor.
以往，如同日本特開2004-77017號公報所記載，排氣淨化裝置係使用於含有從使用接著劑/印刷/塗裝/有機溶劑洗淨設施、及化學工廠等所產生之揮發性有機化合物(Volatile Organic Compound；簡稱VOC)等可燃性有毒成份之排氣的淨化處理。In the past, as disclosed in Japanese Laid-Open Patent Publication No. 2004-77017, the exhaust gas purification device is used for containing volatile organic compounds (such as those produced by using an adhesive/printing/coating/organic solvent cleaning facility, a chemical factory, etc.) Purification of exhaust gas of flammable and toxic components such as Volatile Organic Compound (VOC).
此排氣淨化裝置係例如具備安裝有一對供氣/排氣閥之供氣口/排氣口，並且具備複數個內設有蓄熱體的蓄熱室。具備連通於該等蓄熱室之上方之燃燒室。在此蓄熱燃燒式的排氣淨化裝置中，藉由蓄熱室的供氣/排氣閥以切換排氣之供氣/排氣而運轉，以進行排氣之淨化處理運轉。The exhaust gas purification device includes, for example, an air supply port/exhaust port to which a pair of air supply/exhaust valves are attached, and a plurality of heat storage chambers in which a heat storage body is provided. A combustion chamber connected to the upper of the regenerators is provided. In the regenerative combustion type exhaust gas purification apparatus, the air supply/exhaust valve of the regenerator is operated by switching the supply/exhaust of the exhaust gas to perform the exhaust gas purification processing operation.
由排氣淨化裝置的有效利用及工廠內節省空間(space)化的觀點而言，係期望對於如同上述之1座(台)蓄熱燃燒式的排氣淨化裝置與複數個排氣發生源連接。如此，在1台排氣淨化裝置與複數個排氣發生源連接的情況時，會有排氣淨化裝置之燃燒室的溫度降低，且排氣的排氣溫度異常上升的可能性之問題。此問題係當排氣成為低風量/高濃度的狀態時容易發生。當燃燒室之溫度異常地降低時，排氣中之VOC變為不能分解，而必須停止排氣之淨化處理運轉，此亦為問題。From the viewpoint of effective use of the exhaust gas purification device and space saving in the factory, it is desirable to connect the exhaust gas purification device of the above-described one (station) thermal storage combustion type to a plurality of exhaust gas generation sources. As described above, when one exhaust gas purifying device is connected to a plurality of exhaust gas generating sources, there is a possibility that the temperature of the combustion chamber of the exhaust gas purifying device is lowered and the exhaust gas temperature of the exhaust gas is abnormally increased. This problem is likely to occur when the exhaust gas is in a state of low air volume/high concentration. When the temperature of the combustion chamber is abnormally lowered, the VOC in the exhaust gas becomes incapable of being decomposed, and it is necessary to stop the purification treatment operation of the exhaust gas, which is also a problem.
本發明之目的係在於提供一種排氣淨化裝置及其溫度控制方法，以防止燃燒室溫度的降低或排氣之排氣溫度的異常上升，而能進行適當的淨化處理運轉。An object of the present invention is to provide an exhaust gas purifying apparatus and a temperature control method thereof, which can prevent an abnormal rise in the temperature of the combustion chamber or an abnormal rise in the exhaust gas temperature of the exhaust gas, and can perform an appropriate purifying processing operation.
為達成前述目的，本發明係為一種排氣淨化裝置，用以淨化含有可燃性有毒成份之排氣，係具有：複數個蓄熱室，分別內設有蓄熱體且設有一組供氣口/排氣口；燃燒室，連通於該等複數個蓄熱室上方而形成；排氣/供氣閥，安裝於蓄熱室之各個供氣口/排氣口，用以切換朝蓄熱室之供氣/排氣；加熱燃燒器，設置於燃燒室；排熱風門(damper)，從燃燒室排出餘熱；及控制手段，根據燃燒室溫度進行加熱燃燒器之點火/熄火，並且調整排熱風門的張開程度而以燃燒室溫度成為設定值(SP)的方式進行溫度控制；而控制手段係判定是否為當排氣通過蓄熱體時即升溫至自燃溫度以上而在到達燃燒室前就燃燒的早期燃燒，當判定為早期燃燒時，即執行強制開啟排熱風門，並將加熱燃燒器熄火的早期燃燒對策操作，且當其後判定非為早期燃燒時，即解除早期燃燒對策操作。In order to achieve the above object, the present invention is an exhaust gas purifying device for purifying exhaust gas containing flammable and toxic components, and has a plurality of regenerators each having a regenerator and a set of gas supply ports/rows a gas inlet; a combustion chamber connected to the plurality of regenerators; an exhaust/supply valve installed at each of the air supply/exhaust ports of the regenerator for switching the air supply/discharge to the regenerator Gas; heating burner, disposed in the combustion chamber; exhaust damper, exhausting waste heat from the combustion chamber; and control means, heating/extinguishing the burner according to the temperature of the combustion chamber, and adjusting the degree of opening of the exhaust damper The temperature control is performed such that the combustion chamber temperature becomes the set value (SP), and the control means determines whether it is the early combustion when the exhaust gas passes through the heat storage body, that is, the temperature rises above the auto-ignition temperature and burns before reaching the combustion chamber. When it is determined that early combustion is performed, that is, an early combustion countermeasure that forcibly opens the exhaust damper and extinguishes the heating burner is performed, and when it is determined that it is not early combustion, the early combustion countermeasure is released. .
在以此方式構成之本發明中，因控制手段係判定是否為當排氣通過蓄熱體時即升溫至自燃溫度以上而在到達燃燒室前就燃燒的早期燃燒，當判定為早期燃燒時，即執行強制開啟排熱風門，並將加熱燃燒器熄火的早期燃燒對策 操作，且當其後判定非為早期燃燒時，即解除早期燃燒對策操作，故能防止肇因於此早期燃燒之燃燒室溫度的降低或排氣的排氣溫度之異常上升，藉此，能進行適當的淨化處理運轉。In the present invention configured as described above, it is determined by the control means whether or not the early combustion is performed before the exhaust gas reaches the combustion chamber when the exhaust gas passes through the heat storage body, that is, when it is heated to the autoignition temperature, and when it is determined that it is early combustion, Perform early combustion countermeasures for forcibly opening the exhaust damper and extinguishing the heating burner Operation, and when it is determined that the early combustion is not early combustion, that is, the early combustion countermeasure operation is cancelled, it is possible to prevent a decrease in the temperature of the combustion chamber due to the early combustion or an abnormal rise in the exhaust temperature of the exhaust gas, thereby enabling Perform appropriate purification treatment operations.
本發明宜為進一步具有安裝於燃燒室，以檢測燃燒室溫度之燃燒室溫度感測器(sensor)、安裝於蓄熱室的各個供氣口/排氣口，以檢測供氣溫度之供氣溫度感測器、及檢測排氣溫度之排氣溫度感測器，而控制手段係當藉由燃燒室溫度感測器、供氣溫度感測器及排氣溫度感測器分別檢測到之燃燒室溫度(t1)及供氣溫度(t2)/排氣溫度(t3)滿足(a)t1≦早期燃燒確認SP；及(b)t3-t2≧早期燃燒確認溫度差SP之雙方時，即判定為早期燃燒，且當至少滿足(c)t1≧早期燃燒解除確認SP、及(d)t3-t2≦早期燃燒解除確認溫度差SP之一方條件時，即判定非為早期燃燒。The present invention is preferably further provided with a combustion chamber temperature sensor mounted in the combustion chamber to detect the temperature of the combustion chamber, and various air supply ports/exhaust ports installed in the regenerator to detect the supply air temperature of the supply air temperature. a sensor, and an exhaust temperature sensor for detecting an exhaust temperature, and the control means is a combustion chamber respectively detected by a combustion chamber temperature sensor, a supply air temperature sensor, and an exhaust temperature sensor When the temperature (t1) and the supply air temperature (t2)/exhaust temperature (t3) satisfy (a) t1≦ early combustion confirmation SP; and (b) t3-t2≧ early combustion confirmation temperature difference SP, it is judged as In the early stage of combustion, when at least one of the conditions (c) t1 ≧ early combustion release confirmation SP and (d) t3 - t2 ≦ early combustion release confirmation temperature difference SP is satisfied, it is determined that the early combustion is not performed.
根據以此方式構成之本發明，控制手段係藉由燃燒室溫度(t1)及供氣溫度(t2)/排氣溫度(t3)，而能正確且容易地判定早期燃燒，且進一步藉由燃燒室溫度(t1)或供氣溫度(t2)/排氣溫度(t3)，而能正確且容易地判定非為早期燃燒。According to the invention constructed in this manner, the control means can accurately and easily determine early combustion by the combustion chamber temperature (t1) and the supply air temperature (t2) / exhaust temperature (t3), and further by combustion The chamber temperature (t1) or the supply air temperature (t2)/exhaust temperature (t3) can be correctly and easily determined not to be early combustion.
本發明中，宜為進一步具有安裝於燃燒室，以檢測燃燒室溫度之燃燒室溫度感測器、及安裝於蓄熱室以檢測蓄熱室溫度之蓄熱室溫度感測器，而控制手段係當藉由燃燒室溫度感測器及蓄熱室溫度感測器所分別檢測到之燃燒室溫度(t1)及蓄熱室溫度(t4)滿足(e)t1≦早期燃燒確認SP；及(f)t1-t4≦早期燃燒確認溫度差SP之雙方時，即判定為早期燃燒，且當至少滿足(g)t1≧早期燃燒解除確認SP；及(h)t1-t4≧早期燃燒解除確認溫度差SP之一方條件時，即判定非為早期燃燒。In the present invention, it is preferable to further have a combustion chamber temperature sensor installed in the combustion chamber to detect the temperature of the combustion chamber, and a regenerator temperature sensor installed in the regenerator to detect the temperature of the regenerator, and the control means The combustion chamber temperature (t1) and the regenerator temperature (t4) detected by the combustion chamber temperature sensor and the regenerator temperature sensor respectively satisfy (e) t1 ≦ early combustion confirmation SP; and (f) t1-t4 When both of the early combustions confirm the temperature difference SP, it is judged as early combustion, and at least (g) t1 ≧ early combustion release confirmation SP; and (h) t1 - t4 ≧ early combustion release confirmation temperature difference SP one of the conditions When it is determined that it is not early combustion.
在以此方式構成之本發明中，控制手段係藉由燃燒室溫度(t1)及蓄熱室溫度(t4)，能正確且容易地判定早期燃燒，且進一步藉由燃燒室溫度(t1)或蓄熱室溫度(t4)，能正確且容易地判定非為早期燃燒。根據本發明，因藉由蓄熱室溫度判定早期燃燒及早期燃燒解除，故能更迅速地進行早期燃燒對策處理及早期燃燒解除處理。In the present invention constructed in this manner, the control means can accurately and easily determine the early combustion by the combustion chamber temperature (t1) and the regenerator temperature (t4), and further by the combustion chamber temperature (t1) or heat storage. The chamber temperature (t4) can be correctly and easily determined not to be early combustion. According to the present invention, since the early combustion and the early combustion release are determined by the regenerator temperature, the early combustion countermeasure process and the early combustion release process can be performed more quickly.
在本發明中，宜為早期燃燒解除確認SP較早期燃燒確認SP高，而早期燃燒解除確認溫度差SP較早期燃燒確認溫度差SP低。In the present invention, it is preferable that the early combustion release confirmation SP is higher than the early combustion confirmation SP, and the early combustion release confirmation temperature difference SP is lower than the early combustion confirmation temperature difference SP.
在如此所構成的本發明中，由於早期燃燒解除確認SP設定成較早期燃燒確認SP高，且早期燃燒解除確認溫度差SP設定成較早期燃燒確認溫度差SP低，所以可容易地抑制排氣的排氣溫度之上升。In the present invention configured as described above, since the early combustion release confirmation SP is set to be higher than the early combustion confirmation SP, and the early combustion release confirmation temperature difference SP is set lower than the early combustion confirmation temperature difference SP, the exhaust can be easily suppressed. The rise in exhaust temperature.
在本發明中，宜為進一步具有外氣導入風門，安裝於連接在蓄熱室的各供氣口之排氣供給配管的外氣導入口；而控制手段係於執行早期燃燒對策操作時，當強制開啟排熱風門時，亦強制開啟外氣導入風門，且於解除早期燃燒對策操作解除時，強制關閉外氣導入風門，其後，將加熱燃燒器點火。In the present invention, it is preferable to further have an outside air introduction damper and to be installed at an external air introduction port of the exhaust gas supply pipe connected to each air supply port of the regenerator; and the control means is forcing when performing an early combustion countermeasure operation When the exhaust damper is opened, the external air introduction damper is also forcibly opened, and when the early combustion countermeasure operation is released, the external air introduction damper is forcibly closed, and then the heating burner is ignited.
在以此方式構成之本發明中，因控制手段係於執行早期燃燒對策操作時，強制開啟外氣導入風門而導入外氣(冷風)，故供氣側之蓄熱體內的流速增快，且能在短時間降低蓄熱體溫度，而抑制排氣溫度上升。In the present invention configured in this manner, since the control means is for performing the early combustion countermeasure operation, the external air is introduced into the damper to introduce the outside air (cold air), so that the flow rate in the heat storage body on the air supply side is increased, and The temperature of the regenerator is lowered in a short time, and the temperature of the exhaust gas is suppressed from rising.
本發明係為一種排氣淨化裝置的溫度控制方法，該排氣淨化裝置係用以淨化含有可燃性有毒成份之排氣，具備：複數個蓄熱室，分別內設有蓄熱體且設有一組供氣口/排氣口；燃燒室，連通於該等複數個蓄熱室上方而形成；排氣/供氣閥，安裝於蓄熱室之各個供氣口/排氣口，用以切換朝蓄熱室之供氣/排氣；加熱燃燒器，設置於燃燒室；以及排熱風門，從燃燒室排出餘熱；排氣淨化裝置的溫度控制方法係具有：根據燃燒室溫度進行加熱燃燒器之點火/熄火，並且調整排熱風門的張開程度而以燃燒室溫度成為設定值(SP)的方式進行溫度控制的步驟、及判定是否為當排氣通過蓄熱體時即升溫至自燃溫度以上而在到達燃燒室前就燃燒的早期燃燒，當判定為早期燃燒時，即執行強制開啟排熱風門，並將加熱燃燒器熄火的早期燃燒對策操作，且當其後判定非為早期燃燒時，即解除早期燃燒對策操作的步驟。The invention relates to a temperature control method for an exhaust gas purifying device, which is used for purifying exhaust gas containing flammable and toxic components, and has: a plurality of regenerators each having a regenerator and a set of a gas port/exhaust port; a combustion chamber connected to the plurality of regenerators; an exhaust/supply valve installed at each of the gas supply ports/exhaust ports of the regenerator for switching to the regenerator Supply/exhaust; heating burner, disposed in the combustion chamber; and exhausting the damper, exhausting waste heat from the combustion chamber; the temperature control method of the exhaust purification device has: heating/extinguishing the heating burner according to the temperature of the combustion chamber, Further, the step of temperature control is performed so that the combustion chamber temperature becomes the set value (SP), and whether or not the temperature rises to the auto-ignition temperature or more and reaches the combustion chamber when the exhaust gas passes through the heat storage body is adjusted. The early combustion of the previous combustion, when it is determined that the early combustion is performed, the early combustion countermeasures for forcibly opening the exhaust damper and extinguishing the heating burner are performed, and when it is determined that it is not early When burned, the early steps of the operation, i.e. combustion countermeasure released.
根據本發明之排氣淨化裝置及其溫度控制方法，能防止燃燒室溫度的降低或排氣的排氣溫度異常上升且進行適當的淨化運轉。According to the exhaust gas purifying apparatus and the temperature control method thereof of the present invention, it is possible to prevent a decrease in the temperature of the combustion chamber or an abnormal increase in the exhaust gas temperature of the exhaust gas and perform an appropriate purifying operation.
以下，參照所附圖式，就本發明實施形態之排氣淨化裝置及其溫度控制方法進行說明。在以下說明中，有將「設定值(目標值)」記載為「SP(Set Point)」之情形。Hereinafter, an exhaust gas purifying apparatus and a temperature control method thereof according to an embodiment of the present invention will be described with reference to the accompanying drawings. In the following description, there is a case where "set value (target value)" is described as "SP (Set Point)".
首先，使用第1圖至第5圖說明本發明第1實施形態之排氣淨化裝置及其溫度控制方法。First, an exhaust gas purifying apparatus and a temperature control method thereof according to a first embodiment of the present invention will be described with reference to Figs. 1 to 5 .
第1圖係顯示根據本發明第1實施形態之二塔式的排氣淨化裝置1。此排氣淨化裝置1係具備內設蓄熱體11之複數個(在圖例中為2個)蓄熱室13、及連通於該複數個蓄熱室13、13的上方而形成的燃燒室15。在此，蓄熱體11係為陶瓷蜂巢體(ceramic honeycomb)。Fig. 1 shows a two-tower exhaust gas purification apparatus 1 according to a first embodiment of the present invention. The exhaust gas purification device 1 includes a plurality of (two in the illustrated example) regenerators 13 in which the heat storage bodies 11 are provided, and a combustion chamber 15 that is formed to communicate with the upper of the plurality of regenerators 13 and 13. Here, the heat storage body 11 is a ceramic honeycomb.
蓄熱室13係設有供氣口21/排氣口23，且該等供氣口21/排氣口23安裝有供氣/排氣閥17、19。該等供氣/排氣閥17、19係為提動風門(poppet damper)。此外，於燃燒室15設置有加熱燃燒器25，且進一步設置餘熱排出口29，於此餘熱排出口29安裝有排熱風門27。在此排氣淨化裝置1中，係依每經過預定時間時，藉由供氣/排氣閥17、19，以切換蓄熱室13、13之供氣側(供給被處理氣體(gas)之側)與排氣側(排出處理完畢氣體之側)而運轉。再者，此處雖說明依每個預定時間將朝蓄熱室之供氣/排氣切換運轉的情況，惟本實施形態之排氣淨化裝置並非受限於上述者，亦可根據出入口溫度(藉由溫度感測器測量供氣及排氣之氣體溫度的該溫度)，而切換朝蓄熱室之供氣/排氣以進行運轉。The regenerator 13 is provided with an air supply port 21/exhaust port 23, and the air supply port 21/exhaust port 23 is provided with air supply/exhaust valves 17, 19. These air supply/exhaust valves 17, 19 are poppet dampers. Further, a heating burner 25 is provided in the combustion chamber 15, and a residual heat discharge port 29 is further provided, and a heat exhaust damper 27 is attached to the residual heat discharge port 29. In the exhaust gas purifying device 1, the supply side of the regenerators 13 and 13 is supplied by the supply/exhaust valves 17 and 19 every time a predetermined time elapses (the side to which the gas to be processed is supplied) ) Operates on the exhaust side (the side where the treated gas is discharged). In addition, although the case where the air supply/exhaust gas to the regenerator is switched to operate every predetermined time is described here, the exhaust gas purifying apparatus of this embodiment is not limited to the above, and may be based on the inlet and outlet temperatures. The temperature of the supply and exhaust gas temperatures is measured by a temperature sensor, and the supply/exhaust gas to the regenerator is switched to operate.
排氣供給配管31係分歧連接於各供氣口21，並且淨化氣體排出配管32係合流連接於各排氣口23，且此淨化氣體排出配管32之下游側係連接於淨化氣體排氣導管(duct)33。The exhaust gas supply pipe 31 is branched and connected to each of the gas supply ports 21, and the purge gas discharge pipe 32 is connected to each of the exhaust ports 23, and the downstream side of the purge gas discharge pipe 32 is connected to the purge gas exhaust pipe ( Duct)33.
進一步，於排氣供給配管31之分歧部位的上游側係設有送風機35，並進一步於其上游側設有具備外氣導入風門37之外氣導入口39。再者，外氣導入口39雖亦可直接形成於排氣供給配管31之下游側，惟本實施形態中係透過濾箱(filter box)41而連接。此濾箱41係用以緩和利用去除排氣中之塵埃及過濾阻抗之壓力變動者。Further, a blower 35 is provided on the upstream side of the branching portion of the exhaust gas supply pipe 31, and a gas introduction port 39 other than the outside air introducing damper 37 is further provided on the upstream side. Further, the external air introduction port 39 may be formed directly on the downstream side of the exhaust gas supply pipe 31. However, in the present embodiment, the filter box 41 is connected to each other. This filter box 41 is used to alleviate the pressure change by using the filter impedance of the dust in the exhaust gas.
前述之外氣導入口39及餘熱排出口29係設置為用以減低在排氣淨化裝置1的燃燒處理前後之供氣側與排氣側之蓄熱體11之預備加熱步驟及熱回收(蓄熱)步驟的熱負荷量。The external air introduction port 39 and the residual heat discharge port 29 are provided to reduce the preliminary heating step and heat recovery (heat storage) of the heat storage body 11 on the air supply side and the exhaust side before and after the combustion treatment of the exhaust gas purification device 1. The amount of heat load in the step.
此外，排氣供給配管31之上游側係透過排氣阻斷風門(開閉閥)43而歧管(manifold)性的連接於各排氣發生源(例如塗裝裝置)G1至G5。再者，大氣開放風門45係用以於裝置發生異常而停止的情況時緊急放出排氣而使用。Further, the upstream side of the exhaust gas supply pipe 31 passes through the exhaust gas blocking damper (opening and closing valve) 43 and is connected to each of the exhaust gas generating sources (for example, coating devices) G1 to G5 in a manifold manner. Further, the atmosphere opening damper 45 is used to discharge the exhaust gas urgently when the device is abnormally stopped.
前述之蓄熱燃燒式排氣淨化裝置1之運轉的概略係如下所述。首先，以800℃以上之高溫所分解之處理氣體通過蓄熱體11而冷卻至接近常溫並排氣。接著，藉由供氣/排氣閥17、19切換排氣流向。接著，重新吸氣之排氣，因通過已加熱之蓄熱體11而加熱至接近800℃且進入燃燒室15，故以少量追加能量(energy)即燃燒分解。排氣中之VOC濃度若為一定量以上，則會成為自燃狀態，而能將產生之能量有效利用於廢熱鍋爐(boiler)等。The outline of the operation of the above-described regenerative combustion type exhaust gas purification apparatus 1 is as follows. First, the process gas decomposed at a high temperature of 800 ° C or higher is cooled by the heat storage body 11 to near normal temperature and exhausted. Next, the exhaust gas flow direction is switched by the air supply/exhaust valves 17, 19. Then, the re-exhausted exhaust gas is heated to approximately 800 ° C by the heated regenerator 11 and enters the combustion chamber 15, so that it is decomposed by a small amount of additional energy. When the VOC concentration in the exhaust gas is a certain amount or more, the self-ignition state is obtained, and the generated energy can be effectively utilized in a waste heat boiler or the like.
本發明人等係解決前述之「因與複數個排氣發生源連接，而有排氣淨化裝置的燃燒室溫度下降，且淨化氣體之排氣溫度異常上升之可能性的問題」，亦即，係在檢討即使在當處理氣體成為低風量/高濃度的狀態時，也要防止排氣淨化裝置的燃燒室溫度降低(無必然性之加熱燃燒器的點火)或排氣溫度的異常上升之解決方案過程中，發現前述問題係肇因於排氣之「早期燃燒(中間燃燒)」而發生者。The present inventors have solved the above-mentioned problem that the temperature of the combustion chamber of the exhaust gas purification device is lowered and the exhaust gas temperature of the purge gas is abnormally increased due to the connection with the plurality of exhaust gas generating sources, that is, It is a solution to prevent a decrease in the combustion chamber temperature of the exhaust gas purification device (no ignition of the heating burner inevitably) or an abnormal rise in the exhaust gas temperature even when the process gas is in a state of low air volume/high concentration. During the process, it was found that the above problem occurred due to "early combustion (intermediate combustion)" of the exhaust gas.
在此，所謂「早期燃燒」，係指處理風量變少，且通過蓄熱體之速度變慢，排氣在蓄熱體中途升溫至自燃溫度以上，而在到達燃燒室前過早燃燒之現象。Here, the term "early combustion" refers to a phenomenon in which the amount of air to be treated is reduced, and the speed of the heat storage body is slowed, and the exhaust gas is heated to a temperature higher than the autoignition temperature in the middle of the heat storage body, and burns prematurely before reaching the combustion chamber.
此早期燃燒係因燃燒氣體在供氣側之蓄熱體的後半中被熱交換，故使燃燒氣體降溫而到達燃燒室。亦即，原本在燃燒室燃燒之燃燒氣體(被處理氣體(VOC)等)在蓄熱體部分開始早期燃燒。如此，因燃燒而產生之熱能被蓄熱體吸收。因此，於氣體到達燃燒室時，在燃燒室因被處理氣體的燃燒所產生之熱量未被作為溫度呈現，而產生後述之「燃燒室溫度成為點火SP以下」的現象。結果，容易發生如同下述之問題點1至3。This early combustion is caused by the heat exchange of the combustion gas in the latter half of the heat storage body on the supply side, so that the combustion gas is cooled and reaches the combustion chamber. That is, the combustion gas (processed gas (VOC), etc., which is originally burned in the combustion chamber, starts to burn early in the regenerator portion. Thus, the heat generated by the combustion is absorbed by the heat storage body. Therefore, when the gas reaches the combustion chamber, the heat generated by the combustion of the gas to be processed in the combustion chamber is not exhibited as the temperature, and the phenomenon that the combustion chamber temperature becomes equal to or lower than the ignition SP will be described later. As a result, problems 1 to 3 as described below are apt to occur.
問題點1Problem point 1
因燃燒室溫度成為點火SP以下，故加熱燃燒器點火。此時，因排熱風門27仍為關閉狀態，故因加熱燃燒器25使早期燃燒氣體再加熱，而全部的量流入排氣側蓄熱體。此時，於排氣側蓄熱體因殘留有為前次供氣側時的早期燃燒造成的熱能，故排氣側蓄熱體無法完全作熱回收(因變成熱交換能(熱交換量)不足或超載，故無法熱回收)，因而排氣溫度異常上升。Since the combustion chamber temperature becomes below the ignition SP, the burner is ignited. At this time, since the exhaust damper 27 is still in the closed state, the early combustion gas is reheated by the heating burner 25, and the entire amount flows into the exhaust side heat storage body. At this time, since the exhaust gas side heat storage body retains heat energy due to early combustion on the previous gas supply side, the exhaust side heat storage body cannot be completely recovered by heat (because of the heat exchange energy (heat exchange amount) is insufficient or The load is overloaded, so it cannot be recovered by heat. Therefore, the exhaust gas temperature rises abnormally.
問題點2Problem point 2
蓄熱室13之蓄熱體11係因早期燃燒導致無法熱交換，而在高溫狀態下切換至排氣側，故對蓄熱體的淨化氣體(燃燒氣體)之熱交換能降低，因而排氣溫度異常上升。The regenerator 11 of the regenerator 13 is not exchanged for heat due to early combustion, but is switched to the exhaust side at a high temperature, so that heat exchange energy to the purified gas (combustion gas) of the regenerator is lowered, and the exhaust gas temperature is abnormally increased. .
問題點3Problem point 3
排氣溫度異常上升後之蓄熱室13的蓄熱體11係有成為高溫體(蓄熱超過必要以上)之傾向，在切換至供氣側時，更容易發生早期燃燒，而成為惡性循環。The regenerator 11 of the regenerator 13 after the exhaust gas temperature has risen abnormally tends to be a high-temperature body (heat storage exceeds necessary), and when switching to the air supply side, early combustion is more likely to occur, and a vicious cycle is caused.
而且，根據前述知識見解，而思考出在與複數個排氣發生源連接的情況等之處理氣體成為低風量/高濃度的情況時所適用之排氣淨化裝置及其溫度控制方法。In addition, based on the above-mentioned knowledge, it is considered that the exhaust gas purification device and the temperature control method thereof are applied when the process gas such as the case where the process gas is connected to a plurality of exhaust gas generation sources is a low air volume/high concentration.
以下，就特徵性部分說明關於本實施形態之排氣淨化裝置及其溫度控制方法。Hereinafter, an exhaust gas purifying apparatus and a temperature control method therefor according to the present embodiment will be described in a characteristic part.
排氣淨化裝置1係具備檢測燃燒室溫度之第一溫度檢測器T1、檢測供氣溫度之第二溫度檢測器T2、及檢測排氣溫度之第三溫度檢測器T3。此等溫度檢測器T1、T2、及T3係為檢測溫度最低仍在650℃以上的高溫，故通常使用熱電偶。The exhaust gas purification device 1 includes a first temperature detector T1 that detects the temperature of the combustion chamber, a second temperature detector T2 that detects the supply air temperature, and a third temperature detector T3 that detects the temperature of the exhaust gas. These temperature detectors T1, T2, and T3 are those in which the detection temperature is still at least 650 ° C or higher, so thermocouples are usually used.
而且，來自第一/第二/第三溫度檢測器T1、T2、T3的檢測信號係輸入至微電腦(MC)輸入部。進一步，雖未圖示，但各排氣發生源之導通(ON)信號亦輸入至MC輸入部。此外，藉由來自MC輸出部之操作信號，加熱燃燒器25、排熱風門27、及外氣導入風門37成為可開閉。細節如同後述，排熱風門27係藉由比例控制而成為可調節張開程度。Moreover, the detection signals from the first/second/third temperature detectors T1, T2, and T3 are input to the microcomputer (MC) input unit. Further, although not shown, an ON signal of each exhaust gas generation source is also input to the MC input unit. Further, the heating burner 25, the exhaust damper 27, and the outside air introduction damper 37 are opened and closed by an operation signal from the MC output unit. As will be described later, the exhaust damper 27 is adjusted to be opened by proportional control.
在此，關於本實施形態之排氣處理裝置，係藉由1個排熱風門27而兼用於進行燃燒室溫度的比例控制與早期燃燒對策控制，但亦可以設置2個排熱風門而分別各自控制的方式進行。進一步，排熱風門27亦可不設在燃燒室之側壁，而設於頂壁。Here, the exhaust gas treatment device according to the present embodiment is used for proportional control of the combustion chamber temperature and early combustion countermeasure control by one exhaust damper 27, but two exhaust dampers may be provided and each of them may be provided. The way of control is carried out. Further, the exhaust damper 27 may be disposed not on the side wall of the combustion chamber but on the top wall.
接著，藉由第2(A)圖、第2(B)圖、及第2(C)圖，說明關於本實施形態之排氣處理裝置的淨化處理運轉之溫度控制方法。Next, the temperature control method of the purification processing operation of the exhaust gas treatment device according to the present embodiment will be described with reference to the second (A) diagram, the second (B) diagram, and the second (C) diagram.
在第2(A)圖、第2(B)圖、及第2(C)圖中，「S」係表示各步驟。此外，記載於設定溫度(SP)後的括弧內之溫度，係表示可選定之溫度範圍。此外，各流程圖中之「t1」係意指「在T1所檢測之燃燒室溫度」、「t2」係意指「在T2所檢測之排氣供氣溫度」、「t3」係意指「在T3所檢測之淨化氣體排氣溫度」。In the second (A) diagram, the second (B) diagram, and the second (C) diagram, "S" indicates each step. Further, the temperature in the parentheses after the set temperature (SP) indicates a temperature range that can be selected. In addition, "t1" in each flow chart means "the combustion chamber temperature detected at T1", "t2" means "the exhaust gas supply temperature detected at T2", and "t3" means " The purge gas exhaust temperature detected at T3".
首先，在運轉開始前，關閉設於排氣供給配管31之大氣開放風門45及排氣阻斷風門43，開啟外氣導入風門37，並且開啟排氣淨化裝置1之一方的蓄熱室13(在圖例為左側)之供氣閥17，關閉排氣閥19，且關閉另一方的蓄熱室13(在圖例為右側)之供氣閥17，開啟排氣閥19，進而，亦關閉排熱風門27。First, before the start of the operation, the atmosphere opening damper 45 and the exhaust blocking damper 43 provided in the exhaust gas supply pipe 31 are closed, the outside air introducing damper 37 is opened, and the regenerator 13 of one of the exhaust gas purifying devices 1 is turned on (at The supply valve 17 of the left side is shown, the exhaust valve 19 is closed, and the air supply valve 17 of the other regenerator 13 (on the right side of the figure) is closed, the exhaust valve 19 is opened, and the exhaust damper 27 is also closed. .
(1)運轉準備(預熱)步驟(第2(A)圖)：(1) Operation preparation (preheating) step (Fig. 2(A)):
進行微電腦(MC)的初始設定而重置(reset)(S100)，並且起動供氣/排氣切換運轉(S101)。此運轉係為於每個設定時間進行切換供氣/排氣者。此設定時間雖因排氣的種類而不同，惟係為45至90秒。The initial setting of the microcomputer (MC) is performed and reset (S100), and the air supply/exhaust switching operation is started (S101). This operation is to switch the air supply/exhaust at each set time. Although the set time varies depending on the type of exhaust gas, it is 45 to 90 seconds.
接著，起動送風機35(S102)，並且點火加熱燃燒器25(S103)。燃燒室溫度t1係在預備加熱完成判定步驟(S104)中，若滿足t1≧預備加熱完成SP(650至850℃)時，即完成預備加熱步驟，並轉移至下個處理運轉(定常)。Next, the blower 35 is started (S102), and the burner 25 is ignited to heat (S103). The combustion chamber temperature t1 is in the preliminary heating completion determination step (S104). If the pre-heating completion SP (650 to 850 ° C) is satisfied, the preliminary heating step is completed, and the process is shifted to the next processing operation (steady).
如此，蓄熱體11、11係被蓄熱(預熱)至能將供氣升溫之溫度。此時之預備加熱完成SP係選定為分解排氣所含有VOC之成分必須之溫度(較對象成分燃點高200至300℃之溫度)。In this manner, the heat storage bodies 11 and 11 are stored (preheated) to a temperature at which the supply air can be heated. At this time, the preparatory heating completion is selected as the temperature necessary for decomposing the components of the VOC contained in the exhaust gas (the temperature higher than the ignition temperature of the target component by 200 to 300 ° C).
在前述初始設定中，將溫度設定值(SP)等適當地手動輸入至MC的記憶裝置。再者，將各設定溫度(SP)顯示於表1，並且於欄外顯示各溫度設定SP的高低比較。In the aforementioned initial setting, a temperature setting value (SP) or the like is manually input to the memory device of the MC as appropriate. Further, each set temperature (SP) is shown in Table 1, and the height comparison of each temperature setting SP is displayed outside the column.
SP的高低1)：5＞6＞4＞3＞2＞1、7、9＞8＞10SP high and low 1): 5>6>4>3>2>1,7,9>8>10
SP的高低2)：11＞12SP level 2): 11>12
(2)排氣淨化處理運轉(第2(B)圖)：(2) Exhaust gas purification treatment operation (Fig. 2(B)):
1) 處理運轉(定常)1) Processing operation (constant)
接續前述預備加熱步驟，藉由氣體發生源設備(例如，塗裝裝置)之運轉開始的信號(START)，開啟所選擇之氣體發生源設備的排氣阻斷風門43(S105)，並且關閉外氣導入風門37(S106)。Following the preliminary heating step, the exhaust gas blocking damper 43 of the selected gas generating source device is turned on by the signal (START) of the operation start of the gas generating source device (for example, the coating device) (S105), and the outside is turned off. The air is introduced into the damper 37 (S106).
於是，排氣經由排氣供給配管31，在供氣側(左側)的蓄熱體11經熱交換而升溫後，在燃燒室15燃燒淨化。進一步，在排氣側(右側)的蓄熱體11藉由熱交換而冷卻，由排氣口23經由淨化氣體排出配管32釋放至大氣中。Then, the exhaust gas is heated by the heat exchange of the heat storage body 11 on the air supply side (left side) via the exhaust gas supply pipe 31, and then burned and purified in the combustion chamber 15. Further, the heat storage body 11 on the exhaust side (right side) is cooled by heat exchange, and is released into the atmosphere by the exhaust port 23 via the purge gas discharge pipe 32.
然後，若t1上升，且滿足燃燒器熄火判定步驟(S107)之燃燒器熄火SP(700至900℃)以上之條件，則將加熱燃燒器25熄火(S108)。此燃燒器熄火SP通常設定為排氣之可自燃(不進行加熱輔助亦會自我燃燒)溫度。Then, if t1 rises and the condition of the burner flameout SP (700 to 900 ° C) or more in the burner flameout determination step (S107) is satisfied, the heating burner 25 is turned off (S108). This burner flameout SP is usually set to a temperature at which the exhaust gas can be self-igniting (self-burning without heating assistance).
進一步，若t1上升，且滿足比例控制開始判定步驟(S109)之比例控制開始SP(780至920℃)以上之條件，則以藉由調節排熱風門27之張開程度，而使t1成為目標SP(800至950℃)的方式，進行比例控制(S111)。Further, if t1 rises and the condition of the proportional control start SP (780 to 920 ° C) or more in the proportional control start determination step (S109) is satisfied, t1 is made a target by adjusting the degree of opening of the exhaust damper 27 In the manner of SP (800 to 950 ° C), proportional control is performed (S111).
燃燒室溫度t1雖藉由繼續自燃而升溫，惟如同前述，將該燃燒室溫度t1，藉由調節排熱風門27之張開程度(0至100%)進行比例控制成為目標SP(目標值溫度)。如第3圖所示，例如排熱風門27係於目標SP成為張開程度50%，超過調整SP+側偏差內(目標值溫度+20℃)則全開(張開程度100%)，未滿調整SP-側偏差內(目標值溫度-20℃)則全閉(張開程度0%)，與目標值之溫度差成比例而進行調節張開程度。亦即，於本實施形態中，所謂「比例溫度控制」，係意指如同以上以「燃燒室溫度」成為「設定值(目標值溫度)」的方式，以預定之溫度幅度(在此為40℃的幅度)中，藉由調節排熱風門27的張開程度(因應相對於「燃燒室溫度」之「設定值」的溫度差調整張開程度)，而進行比例性控制者。再者，「設定值(SP)」或「溫度幅度」係並非受限於此。The combustion chamber temperature t1 is increased by continuing self-ignition, but as described above, the combustion chamber temperature t1 is proportionally controlled by adjusting the degree of opening of the exhaust damper 27 (0 to 100%) to become the target SP (target temperature). ). As shown in Fig. 3, for example, the exhaust damper 27 is 50% of the opening degree of the target SP, and is fully open (100% of opening degree) within the deviation of the adjusted SP+ side (target temperature + 20 °C), which is not adjusted. Within the SP-side deviation (target temperature -20 °C), it is fully closed (degree of opening 0%), and the degree of opening is adjusted in proportion to the temperature difference of the target value. In other words, in the present embodiment, the term "proportional temperature control" means a predetermined temperature range (here, 40) as the "combustion chamber temperature" is set to "set value (target temperature)". In the amplitude of °C, the proportional control is performed by adjusting the degree of opening of the exhaust damper 27 (the degree of opening is adjusted in accordance with the temperature difference of the "set value" of the "combustion chamber temperature"). Furthermore, "set value (SP)" or "temperature amplitude" is not limited to this.
再者，於本實施形態中，溫度控制係非受限於前述比例溫度控制，而亦可為積分控制、微分控制、及組合此等之控制方式之PID控制。Furthermore, in the present embodiment, the temperature control system is not limited to the proportional temperature control, but may be integral control, differential control, and PID control in which the control modes are combined.
2) 不能溫度調節控制時2) When temperature control is not possible
無法藉由比例控制將t1控制於偏差溫度的上限/下限值的情況(S112)，係如下述分歧為：t1變成較-側偏差SP低的情況(a)及t1變成較+側偏差SP高的情況(b)。When it is not possible to control t1 to the upper limit/lower limit of the deviation temperature by the proportional control (S112), the following differences are as follows: t1 becomes lower than the side deviation SP (a) and t1 becomes more + side deviation SP High situation (b).
(a)當-側偏差SP外之條件(排熱風門全閉狀態)時間結束(time up)(S131)，且t1下降而變成較燃燒器再點火判定步驟(S132)中的燃燒器再點火SP(700至850℃)低時，進行燃燒器點火(S133)，並回到正常處理運轉的燃燒器熄火SP(700至900℃)之判定步驟(S107)。(a) When the condition other than the side deviation SP (the exhaust damper fully closed state) is time up (S131), and t1 falls, it becomes the burner re-ignition in the burner re-ignition determination step (S132). When the SP (700 to 850 ° C) is low, the burner is ignited (S133), and the determination step (S107) of the burner shutoff SP (700 to 900 ° C) of the normal processing operation is returned.
(b)當+側偏差SP外之條件(排熱風門全開狀態)時間結束(S141)，且t1上升而變成較外氣導入開始判定步驟(S142)中的外氣導入開始SP(820至1000℃)高時，即開啟外氣導入風門(S143)，若t1下降，而變成較外氣導入停止判定步驟(S144)中的外氣導入停止SP(800至950℃)低時，則關閉外氣導入風門(S145)。其後，轉移至比例控制(S111)。(b) When the condition other than the + side deviation SP (the exhaust damper fully open state) is completed (S141), and t1 rises, the external air introduction start SP (820 to 1000) in the external air introduction start determination step (S142) is reached. When the temperature is high, the external air introduction damper (S143) is turned on, and if t1 is lowered, the external air introduction stop SP (800 to 950 ° C) in the external air introduction stop determination step (S144) is turned off, and then the outside is closed. The air is introduced into the damper (S145). Thereafter, the process shifts to proportional control (S111).
(3)早期燃燒對策運轉(第2(C)圖)：(3) Early combustion countermeasure operation (Fig. 2(C)):
1)早期燃燒對策步驟：1) Early combustion countermeasure steps:
接續前述預備步驟，藉由氣體發生源設備(例如塗裝裝置)之運轉開始信號，開始第2(B)圖所示之排氣淨化處理運轉，進行排氣淨化處理運轉並同時進行轉移至第2(C)圖所示之早期燃燒對策步驟。In the preparatory step, the exhaust gas purification processing operation shown in FIG. 2(B) is started by the operation start signal of the gas generating source device (for example, the coating device), and the exhaust gas purification processing operation is performed and simultaneously transferred to the first The early combustion countermeasure step shown in Fig. 2(C).
亦即，燃燒室溫度(t1)及供氣溫度(t2)/排氣溫度(t3)係滿足：That is, the combustion chamber temperature (t1) and the supply air temperature (t2) / exhaust temperature (t3) are satisfied:
(a)t1≦早期燃燒確認SP(700至880℃)(a) t1≦ early combustion confirmation SP (700 to 880 ° C)
(b)t3-t2≧早期燃燒確認溫度差SP(30至180℃)雙方之條件(S201、S202)，且於此狀態維持一定時間(10至120秒)時(S203)，即判定發生早期燃燒。此時，若燃燒器為點火中(S204-1)，則將燃燒器熄火(S204-2)，並進一步以設定張開程度開啟排熱風門27(S205)。此排熱風門27之設定張開程度通常為10至70%之範圍，且為因應排氣種類而根據實驗所求得之最適值。另一方面，若燃燒器已熄火(S204-1)，則就此以設定張開程度開啟排熱風門27(S205)。(b) t3-t2≧ early combustion confirms the condition of both the temperature difference SP (30 to 180 °C) (S201, S202), and when the state is maintained for a certain period of time (10 to 120 seconds) (S203), it is determined that an early stage occurs. combustion. At this time, if the burner is in the ignition (S204-1), the burner is turned off (S204-2), and the exhaust damper 27 is further opened at the set opening degree (S205). The degree of opening of the exhaust damper 27 is usually in the range of 10 to 70%, and is an optimum value obtained by experiments according to the type of exhaust gas. On the other hand, if the burner has been turned off (S204-1), the exhaust damper 27 is opened at the set opening degree (S205).
再者，以選項(option)而言，於選擇外氣導入模式(mode)的情況(S301)時，強制開啟外氣導入風門(S302)。如此，供氣側之蓄熱體11內之流速會因開啟外氣導入風門37導入外氣(冷風)而增快，成為蓄熱體溫度能在短時間降低而抑制排氣溫上升。此時，外氣導入風門37的張開程度亦根據裝置之可處理風量，進一步設定因應排氣種類而根據實驗所求得之最適張開程度。再者，在外氣導入風門未附加張開程度調整功能的情況，係增加送風機35的頻率而進行風量調整。Further, in the case of the option (option), when the outside air introduction mode (mode) is selected (S301), the outside air introduction damper is forcibly opened (S302). In this way, the flow velocity in the heat storage body 11 on the air supply side is increased by the introduction of the outside air (cold air) by the opening of the outside air introduction damper 37, and the temperature of the heat storage body can be lowered in a short time to suppress the increase in the exhaust gas temperature. At this time, the degree of opening of the outside air introduction damper 37 is further set according to the handleable air volume of the apparatus, and the optimum degree of opening according to the experiment in accordance with the type of the exhaust gas is further set. Further, when the outside air introduction damper is not provided with the opening degree adjustment function, the frequency of the blower 35 is increased to adjust the air volume.
2)早期燃燒對策解除步驟：2) Early combustion countermeasures release steps:
進入前述早期燃燒對策後，係如下述，轉移至正常運轉步驟的各步驟。After entering the aforementioned early combustion countermeasures, the process proceeds to the respective steps of the normal operation step as described below.
(c)t1≧早期燃燒解除確認SP(750至900℃)(c) t1≧ early combustion release confirmation SP (750 to 900 ° C)
(d)t3-t2≦早期燃燒解除確認溫度差SP(20至150℃)(d) t3-t2≦ early combustion release confirmation temperature difference SP (20 to 150 ° C)
若(c)及(d)之一方已繼續(S206、S207、S208-1/2)預定時間(時間結束：10至120秒)，則將排熱風門27全閉(S209)。其後，轉移至燃燒器再點火之判定步驟(S210)，當t1較燃燒器再點火SP(750至850℃)低的情況時，將加熱燃燒器點火(S211)，並回到早期燃燒對策運轉之步驟S201。再者，當選擇外氣導入模式的情況時，在將加熱燃燒器點火(S211)前，將外氣導入風門全閉(S303-1)。If one of (c) and (d) has continued (S206, S207, S208-1/2) for a predetermined time (time end: 10 to 120 seconds), the exhaust damper 27 is fully closed (S209). Thereafter, the process proceeds to the burner re-ignition determination step (S210). When t1 is lower than the burner re-ignition SP (750 to 850 ° C), the heating burner is ignited (S211), and the early combustion countermeasure is returned. Step S201 of operation. Further, when the outside air introduction mode is selected, the outside air is introduced into the damper fully closed (S303-1) before the heating burner is ignited (S211).
於燃燒器點火判定步驟S210中，當未滿足t1≦燃燒器再點火SP(750至850℃)時，則就此回到早期燃燒對策運轉之步驟S201。In the burner ignition determination step S210, when the burner re-ignition SP (750 to 850 ° C) is not satisfied, the process returns to the early combustion countermeasure operation step S201.
此外，在早期燃燒解除溫度差的判定步驟(S207)中，當未滿足t3-t2≦早期燃燒解除確認溫度差SP的條件時，則轉移至早期燃燒對策強制解除確認之判定步驟(S212)。在此判定步驟中滿足t1≦強制解除溫度SP(600至700℃)時，將排熱風門27全閉後(S213)，且進行燃燒器點火(214)後，在維持預定時間(10至60分)後(S215)，回到早期燃燒對策運轉之步驟S201。In the determination step (S207) of the early combustion release temperature difference, when the condition of the t3-t2≦ early combustion release confirmation temperature difference SP is not satisfied, the process proceeds to the determination step of the early combustion countermeasure forced release confirmation (S212). When the t1 ≦ forced release temperature SP (600 to 700 ° C) is satisfied in this determination step, the exhaust damper 27 is fully closed (S213), and after the burner is ignited (214), the predetermined time (10 to 60) is maintained. After the step (S215), the process returns to the step S201 of the early combustion countermeasure operation.
再者，當選擇外氣導入模式時，於點火加熱燃燒器(S214)前，關閉外氣導入風門(S303-2)。Further, when the outside air introduction mode is selected, the outside air introduction damper is closed (S303-2) before the ignition heating burner (S214).
如同前述，因以使早期燃燒解除確認SP較早期燃燒確認SP高(例如20至25度)，且使早期燃燒解除確認溫度差SP較早期燃燒確認溫度SP低(10至30度)的方式設定，故排氣溫度的上升變為容易抑制。即使早期燃燒解除確認SP與早期燃燒確認SP相同，且早期燃燒解除確認溫度差SP與早期燃燒確認溫度差SP相同，亦能某種程度的抑制因排氣淨化裝置的早期燃燒所導致之排氣溫度的上升。As described above, the early combustion release confirmation SP is set higher than the early combustion confirmation SP (for example, 20 to 25 degrees), and the early combustion release confirmation temperature difference SP is set lower than the early combustion confirmation temperature SP (10 to 30 degrees). Therefore, the rise in the exhaust gas temperature is easily suppressed. Even if the early combustion release confirmation SP is the same as the early combustion confirmation SP, and the early combustion release confirmation temperature difference SP is the same as the early combustion confirmation temperature difference SP, the exhaust due to the early combustion of the exhaust purification device can be suppressed to some extent. The rise in temperature.
再者，進行前述排氣淨化處理運轉之結束(stop)，係關閉排熱風門27並且將燃燒器25熄火，進一步開啟外氣導入風門37，關閉排氣阻斷風門43並停止送風機35。Further, when the exhaust gas purification processing operation is stopped, the exhaust damper 27 is closed and the burner 25 is turned off, the external air introduction damper 37 is further opened, the exhaust damper 43 is closed, and the blower 35 is stopped.
此外，本發明之第1實施形態係不限於如第1圖之二塔式排氣淨化裝置，而亦能適用於如第4圖之三塔式、四塔式、五塔式等具有多數個蓄熱體之多塔式的排氣淨化裝置。本發明之第1實施形態進一步不受限於多塔式排氣淨化裝置，而亦能適用於如第5圖之使用旋轉式切換閥24的旋轉切換閥式的排氣淨化裝置。該等各圖中，關於對應部份係附加同一圖符號，並省略該等說明。Further, the first embodiment of the present invention is not limited to the tower type exhaust gas purification apparatus as shown in Fig. 1, but can be applied to a plurality of towers, four towers, five towers, and the like as shown in Fig. 4 Multi-tower exhaust gas purification device for regenerator. The first embodiment of the present invention is not limited to the multi-tower exhaust gas purification device, and can be applied to the rotary switching valve type exhaust gas purification device using the rotary switching valve 24 as shown in Fig. 5. In the respective drawings, the same reference numerals will be given to the corresponding parts, and the description will be omitted.
此等多塔式/旋轉切換閥式裝置中，宜為將1個或複數個室作為潔淨(purge)殘留有排氣之蓄熱體11之潔淨室使用而運轉，而不作為供氣室/排氣室使用。此處所謂潔淨，係意指將殘留於蓄熱體11之排氣置換為清淨氣體(潔淨氣體)。In such a multi-tower/rotary switching valve type device, it is preferable to operate one or a plurality of chambers as a clean room for purifying the regenerator 11 having exhaust gas, and not as a supply/exhaust chamber. use. The term "cleaning" as used herein means replacing the exhaust gas remaining in the heat storage body 11 with a clean gas (clean gas).
例如，第4圖所示之三塔式排氣淨化裝置的情況，係將二塔與習知相同作為供氣室與排氣室，並且將剩下的一塔作為潔淨室使用，如同圖示，藉由切換風門21、23而依序進行氣體流路之切換。For example, in the case of the three-column exhaust gas purification apparatus shown in Fig. 4, the two towers are used as the air supply chamber and the exhaust chamber, and the remaining tower is used as a clean room, as shown in the figure. The switching of the gas flow paths is sequentially performed by switching the dampers 21 and 23.
於第4圖所示之排氣淨化裝置中，潔淨係成為將淨化之排氣作為潔淨氣體，並將藉由潔淨而由蓄熱體11排出之排氣以回流配管22送回到裝置入口(濾箱41)。此外，亦可將潔淨氣體作為大氣，且將回流配管22作為潔淨氣體注入配管，並於此配管連接吹風器(blower)(未圖示)，藉由對蓄熱體11注入潔淨氣體而進行潔淨。In the exhaust gas purification device shown in Fig. 4, the clean air is used as the clean gas, and the exhaust gas discharged from the heat storage body 11 by the clean gas is returned to the device inlet by the return pipe 22 (filtering Box 41). In addition, the clean gas may be used as the atmosphere, and the return pipe 22 may be injected into the pipe as a clean gas, and a blower (not shown) may be connected to the pipe, and the heat storage body 11 may be cleaned by injecting a clean gas.
此外，第5圖所示之旋轉切換閥式的淨化裝置，係在八塔之中，每三塔分配為供氣室13A、排氣室13B，並將剩下的二塔分配為潔淨室13C及不使用室13D，且與前述同樣地以旋轉式切換閥24依序地切換而運轉者。Further, the rotary switching valve type purifying device shown in Fig. 5 is among the eight towers, and each of the three towers is assigned to the air supply chamber 13A and the exhaust chamber 13B, and the remaining two towers are allocated as the clean room 13C. The chamber 13D is not used, and the rotary switching valve 24 is sequentially switched and operated in the same manner as described above.
如同前述，當設置潔淨室而進行淨化運轉時，因將潔淨後之蓄熱體11使用於排氣用之蓄熱體11，故變得容易防止風門切換時未處理氣體流出之尖峰濃度的顯現，並確保含有VOC等可燃性有害成分之排氣的淨化效能。當然，亦能進行未設置潔淨室之淨化運轉。As described above, when the clean room is installed and the purifying operation is performed, since the regenerative body 11 after the cleansing is used for the regenerator 11 for exhaust gas, it is easy to prevent the peak concentration of the unprocessed gas from flowing out during the switching of the damper, and Ensure the purification efficiency of exhaust gas containing flammable and harmful components such as VOC. Of course, it is also possible to carry out a purification operation in which a clean room is not provided.
此外，本實施形態之排氣淨化裝置係非受限於如第1圖、第4圖、及第5圖所示之排氣阻斷風門43的數量多者，即使排氣阻斷風門的數量少，因氣體之風量/濃度會有變化的情形，故無關於氣體供給側之排氣阻斷風門43的數量而能適用。Further, the exhaust gas purifying apparatus of the present embodiment is not limited to the number of exhaust blocking dampers 43 as shown in Figs. 1, 4, and 5, even if the number of exhaust blocking dampers is large. Since there is little change in the amount of air/concentration of the gas, it is not applicable to the number of exhaust dampers 43 on the gas supply side.
如同以上說明，本實施形態之排氣淨化裝置1係具備：複數個蓄熱室13，分別內設有蓄熱體11且設有一組供氣口/排氣口21、23；燃燒室15，連通於該等複數個蓄熱室上方而形成；排氣/供氣閥17、19，安裝於蓄熱室15之各個供氣口/排氣口21、23，用以切換朝蓄熱室13之供氣/排氣；加熱燃燒器25，設置於燃燒室13；排熱風門27，從燃燒室15排出餘熱；及微電腦(MC)，而藉由供氣/排氣閥17、19，依每個預定時間切換朝蓄熱室13之供氣/排氣而運轉。此外，藉由微電腦(MC)，並根據燃燒室溫度t1，以進行加熱燃燒器之點火/熄火，並且調整排熱風門27的張開程度而以燃燒室溫度t1成為設定值(SP)的方式進行比例溫度控制。As described above, the exhaust gas purification device 1 of the present embodiment includes a plurality of heat storage chambers 13 each having a heat storage body 11 therein and a plurality of gas supply ports/exhaust ports 21 and 23, and a combustion chamber 15 connected to each other. The plurality of regenerators are formed above; the exhaust/supply valves 17, 19 are installed in the respective air supply/exhaust ports 21, 23 of the regenerator 15 for switching the air supply/discharge to the regenerator 13 The heating burner 25 is disposed in the combustion chamber 13; the exhaust damper 27 discharges waste heat from the combustion chamber 15; and the microcomputer (MC), and is switched by the supply/exhaust valves 17, 19 for each predetermined time. The operation is performed by supplying air/exhaust gas to the regenerator 13 . Further, by means of the microcomputer (MC), and according to the combustion chamber temperature t1, the ignition/extinction of the heating burner is performed, and the degree of opening of the exhaust damper 27 is adjusted to set the combustion chamber temperature t1 to the set value (SP). Proportional temperature control.
進一步，於本實施形態之排氣淨化裝置1中，微電腦(MC)係判定當排氣通過蓄熱體11時是否為升溫至自燃溫度以上而於到達燃燒室15前燃燒之早期燃燒，當判定為早期燃燒時，即執行強制開啟排熱風門27，並將加熱燃燒器15熄火的早期燃燒對策操作，且當其後判定非為早期燃燒時，即解除早期燃燒對策操作，故能防止肇因於早期燃燒之燃燒室溫度的降低或排氣的排氣溫度之異常上升。Further, in the exhaust gas purifying apparatus 1 of the present embodiment, the microcomputer (MC) determines whether or not the exhaust gas is heated to the autoignition temperature or higher before the exhaust gas passes through the heat accumulating body 11 and is burned early in the combustion before reaching the combustion chamber 15, and is determined to be In the early combustion, the early combustion countermeasures for forcibly opening the exhaust damper 27 and extinguishing the heating burner 15 are performed, and when it is determined that the early combustion is not early combustion, the early combustion countermeasure operation is released, thereby preventing the cause of the early combustion countermeasure The temperature of the combustion chamber in the early combustion is lowered or the exhaust temperature of the exhaust gas is abnormally increased.
此外，於本實施形態之排氣淨化裝置中，微電腦(MC)係以下述方式進行控制，故能正確且容易地判定早期燃燒，並執行早期燃燒對策解除操作：當滿足前述關係式(a)、(b)雙方時，即強制開啟排熱風門27，並在經過將燃燒器熄火之早期燃燒對策操作後，當變成未滿足前述關係式(c)、(d)一方或雙方時，將排熱風門全閉，而經過早期燃燒對策解除操作。Further, in the exhaust gas purifying apparatus of the present embodiment, the microcomputer (MC) is controlled as follows, so that early combustion can be accurately and easily determined, and an early combustion countermeasure release operation can be performed: when the above relation (a) is satisfied And (b) when both sides are forced to open the exhaust damper 27, and after the early combustion countermeasures for extinguishing the burner are extinguished, when one or both of the above relational expressions (c) and (d) are not satisfied, the row will be discharged. The hot damper is fully closed, and the operation is released after an early combustion countermeasure.
如同前述，當燃燒室溫度異常降低時，排氣中之VOC變為不能分解，雖必須停止淨化處理運轉，但若根據本實施形態之排氣淨化裝置1，則難以發生與此淨化處理運轉停止相關的燃燒室溫度之異常降低或排氣溫度的異常上升。As described above, when the temperature of the combustion chamber is abnormally lowered, the VOC in the exhaust gas cannot be decomposed, and the purification processing operation must be stopped. However, according to the exhaust gas purification device 1 of the present embodiment, it is difficult to stop the purification processing operation. An abnormal decrease in the associated combustion chamber temperature or an abnormal rise in the exhaust gas temperature.
亦即，監視燃燒室溫度降低與排氣溫度上升，且當此等溫度達到設定值時，打開排熱風門27，並減少流動至排出側的蓄熱體之氣體流量，故儲存於蓄熱體之熱量減少，藉此，能抑制排氣溫度的異常上升。That is, the temperature of the combustion chamber is lowered and the temperature of the exhaust gas is increased, and when the temperatures reach the set value, the exhaust damper 27 is opened, and the flow rate of the gas flowing to the heat storage body on the discharge side is reduced, so that the heat stored in the heat storage body is This is reduced, whereby an abnormal rise in the exhaust gas temperature can be suppressed.
而且，藉由抑制燃燒室溫度的異常降低，能抑制淨化處理運轉停止次數或加熱燃燒器之無用的點火，並亦能抑制燃燒室加溫用燃燒器的燃料使用量。Further, by suppressing an abnormal decrease in the temperature of the combustion chamber, it is possible to suppress the number of times of the purification processing operation stop or the useless ignition of the heating burner, and it is also possible to suppress the fuel usage amount of the combustion chamber heating burner.
此外，若為設置有餘熱排出用風門的蓄熱燃燒式氣體淨化裝置，則無須改造排氣淨化裝置本身，僅藉溫度感測器與控制程式(program)之變更即能實施本實施形態。Further, in the case of the regenerative combustion type gas purifying apparatus provided with the defrosting damper, it is not necessary to modify the exhaust gas purifying apparatus itself, and the present embodiment can be implemented only by the change of the temperature sensor and the control program.
進一步，根據本實施形態之排氣淨化裝置，由設置於裝置之上游側的外氣導入風門強制性導入冷風，藉由予以增加氣體風量，進一步，亦能在短時間內消除早期燃燒等異常事態。Further, according to the exhaust gas purifying apparatus of the present embodiment, the cold air is forcibly introduced by the external air introduction damper provided on the upstream side of the apparatus, and the amount of the air volume is increased, and the abnormal state such as early combustion can be eliminated in a short time. .
如以上所說明，根據本實施形態之排氣淨化裝置1及其溫度控制方法，藉由防止燃燒室溫度的降低或淨化氣體排氣溫度的異常上升，而能實現適當的淨化處理運轉。As described above, according to the exhaust gas purifying apparatus 1 and the temperature control method thereof of the present embodiment, an appropriate purification processing operation can be realized by preventing a decrease in the combustion chamber temperature or an abnormal rise in the purge gas exhaust temperature.
接著，藉由第2(A)圖、第2(B)圖、第6圖及第7圖，說明關於本發明第2實施形態之排氣淨化裝置及其溫度控制方法。在第2實施形態中，除了使用蓄熱室溫度(t4)控制排氣淨化裝置，以取代前述第1實施形態之供氣溫度(t2)及排氣溫度(t3)之外，係與第1實施形態相同。因此，關於與第1實施形態共通部分，賦予相同符號，並省略該說明。Next, an exhaust gas purifying apparatus and a temperature control method therefor according to a second embodiment of the present invention will be described with reference to FIGS. 2(A), 2(B), 6 and 7. In the second embodiment, the exhaust gas purification device is controlled by using the regenerator temperature (t4) instead of the air supply temperature (t2) and the exhaust gas temperature (t3) of the first embodiment. The shape is the same. Therefore, the same portions as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
如第6圖所示，本發明之第2實施形態的排氣淨化裝置501，係具備複數個內設有蓄熱體11之蓄熱室13(圖例中為2個)、與連通於此複數個蓄熱室13、13之上方而形成的燃燒室15。As shown in Fig. 6, the exhaust gas purification device 501 according to the second embodiment of the present invention includes a plurality of regenerators 13 (two in the illustrated example) in which the heat storage bodies 11 are provided, and a plurality of heat storages connected thereto. A combustion chamber 15 formed above the chambers 13, 13.
蓄熱室13係具有安裝有供氣/排氣閥17、19之供氣口21/排氣口23。此外，燃燒室15係具有加熱燃燒器25，並具有安裝有排熱風門27的餘熱排出口29。而且，每經過預定時間即藉由供氣/排氣閥17、19來切換蓄熱室13、13的供氣側與排氣側，並進行運轉。The regenerator 13 has an air supply port 21/exhaust port 23 to which the air supply/exhaust valves 17, 19 are attached. Further, the combustion chamber 15 has a heating burner 25 and has a residual heat discharge port 29 to which the exhaust damper 27 is attached. Further, the supply side and the exhaust side of the regenerators 13 and 13 are switched by the supply/exhaust valves 17, 19 every predetermined time period, and the operation is performed.
此外，於排氣淨化裝置501係與排氣淨化裝置1相同，設置有排氣供給配管31、淨化氣體排出配管32、淨化氣體排氣導管33、送風機35、外氣導入風門37、外氣導入口39、及濾箱41等。In the same manner as the exhaust gas purification device 1, the exhaust gas purification device 501 is provided with an exhaust gas supply pipe 31, a purge gas discharge pipe 32, a purge gas exhaust pipe 33, a blower 35, an external air introduction damper 37, and an external air introduction. Port 39, filter box 41, and the like.
排氣淨化裝置501係具備檢測燃燒室溫度之第一溫度檢測器T1及檢測蓄熱室溫度之第四溫度檢測器T4。此等溫度檢測器因係檢測溫度最低仍在650℃以上的高溫，故通常使用熱電偶。而且，與第一溫度檢測器T1相同，來自第四溫度檢測器T4之檢測信號亦可輸入至微電腦(MC)的輸入部。The exhaust gas purification device 501 includes a first temperature detector T1 that detects the temperature of the combustion chamber and a fourth temperature detector T4 that detects the temperature of the regenerator. These temperature detectors usually use thermocouples because they detect temperatures that are still below 650 ° C. Further, similarly to the first temperature detector T1, the detection signal from the fourth temperature detector T4 can also be input to the input portion of the microcomputer (MC).
有關排氣淨化裝置501之淨化處理運轉的溫度控制，係依照第2(A)圖、第2(B)圖、及第7圖所示之流程圖進行。亦即，在第2實施形態之排氣淨化裝置501中，係成為進行第7圖之S701、S702、S706、S707之處理，以取代第2(C)圖之S201、S202、S206、S207，此等以外之步驟因以與第1實施形態相同的流程進行，故省略該等說明。此處，關於第7圖之流程圖的「t4」係意指「在T4所檢測之蓄熱室溫度」。The temperature control of the purification processing operation of the exhaust gas purification device 501 is performed in accordance with the flowcharts shown in FIGS. 2(A), 2(B), and 7. In other words, in the exhaust gas purification device 501 of the second embodiment, the processes of S701, S702, S706, and S707 in Fig. 7 are performed instead of S201, S202, S206, and S207 in the second (C) diagram. Since the steps other than these are performed in the same flow as in the first embodiment, the description thereof will be omitted. Here, "t4" in the flowchart of Fig. 7 means "the temperature of the regenerator detected at T4".
於排氣淨化裝置501之淨化處理運轉中，「(1)運轉準備(預熱)步驟(第2(A)圖)：」與「(2)排氣淨化處理運轉(第2(B)圖)：」係與第1實施形態相同。In the purification processing operation of the exhaust gas purification device 501, "(1) Operation preparation (preheating) step (Fig. 2(A)):" and "(2) Exhaust gas purification processing operation (Fig. 2(B)) ":" is the same as in the first embodiment.
(4)早期燃燒對策運轉(第7圖)：(4) Early combustion countermeasure operation (Fig. 7):
1)早期燃燒對策步驟：1) Early combustion countermeasure steps:
燃燒室溫度t1係變為較前述之正常運轉的燃燒器熄火判定步驟(S107)之燃燒器熄火SP為低，當排氣成份有發生早期燃燒之虞時，進入早期燃燒對策步驟。The combustion chamber temperature t1 is lower than the burner flameout SP of the burner shutoff determination step (S107) of the above-described normal operation, and enters the early combustion countermeasure step when there is an early combustion of the exhaust gas component.
亦即，燃燒室溫度(t1)及蓄熱室溫度(t4)係滿足：That is, the combustion chamber temperature (t1) and the regenerator temperature (t4) satisfy:
(a)t1≦早期燃燒確認SP(700至880℃)(a) t1≦ early combustion confirmation SP (700 to 880 ° C)
(b’)t1-t4≦早期燃燒確認溫度差SP(100至300℃)雙方之條件(S701、S702)，且於此狀態維持一定時間(10至120秒)時(S203)，即判定發生早期燃燒，而將燃燒器熄火(S204)，且以設定張開程度開啟排熱風門27(S205)。此時的排熱風門27之設定張開程度通常為10至70%之範圍，且為因應排氣種類而根據實驗所求得之最適值。(b') t1 - t4 ≦ early combustion confirms the condition of both the temperature difference SP (100 to 300 ° C) (S701, S702), and when the state is maintained for a certain period of time (10 to 120 seconds) (S203), the determination occurs. Early combustion, the burner is turned off (S204), and the exhaust damper 27 is opened at a set opening degree (S205). At this time, the degree of opening of the exhaust damper 27 is usually in the range of 10 to 70%, and is an optimum value obtained by experiments according to the type of exhaust gas.
此處，在(b’)或後述之(d’)所使用的t4，基本上，以早期燃燒對策而言，係使用以設置於供氣側之蓄熱室的溫度感測器(第四溫度檢測器T4)所檢測之蓄熱室溫度較為有利。再者，當早期燃燒發生時，因成為供氣側及排氣側依序切換之雙方的蓄熱室之溫度逐漸上升，故例如將設於蓄熱室之溫度感測器(第四溫度檢測器T4)設置於任一方之蓄熱室，亦能恆常地將此蓄熱室之蓄熱室內溫度作為t4來使用。Here, in t4 used in (b') or (d') which will be described later, basically, in the case of early combustion countermeasures, a temperature sensor (fourth temperature) provided in the regenerator of the air supply side is used. The temperature of the regenerator detected by detector T4) is advantageous. In addition, when the early combustion occurs, the temperature of the regenerators that are sequentially switched between the supply side and the exhaust side gradually increases, so that, for example, a temperature sensor provided in the regenerator (fourth temperature detector T4) It is also possible to use the regenerator temperature in either of the regenerators as t4.
再者，以選項而言，關於在選擇外氣導入模式時(S301)之強制開啟外氣導入風門(S302)的情形，係與第1實施形態相同。In addition, the case where the external air introduction damper (S302) is forcibly opened when the outside air introduction mode is selected (S301) is the same as that of the first embodiment.
2)早期燃燒對策解除步驟：2) Early combustion countermeasures release steps:
進入前述早期燃燒對策後，係如同下述，轉移至正常運轉步驟的各步驟。After entering the aforementioned early combustion countermeasures, the process proceeds to the respective steps of the normal operation step as described below.
(c)t1≧早期燃燒解除確認SP(750至900℃)(c) t1≧ early combustion release confirmation SP (750 to 900 ° C)
(d’)t1-t4≧早期燃燒解除確認溫度差SP(150至350℃)，若(c)及(d)之一方已繼續預定時間(時間結束：10至120秒)(S706、S707、S208-1/2)，則將排熱風門27全閉(S209)。關於其後之步驟(S210、S211、S303-1等)，係與第2(C)圖的情況相同。(d')t1-t4≧Early combustion release confirms the temperature difference SP (150 to 350 °C), if one of (c) and (d) has continued for a predetermined time (end of time: 10 to 120 seconds) (S706, S707, In S208-1/2), the exhaust damper 27 is fully closed (S209). The subsequent steps (S210, S211, S303-1, etc.) are the same as in the case of the second (C) diagram.
此外，於早期燃燒解除溫度差之判定步驟(S707)中，當未滿足t3-t2≦早期燃燒解除確認溫度差SP之條件時，即移轉至早期燃燒對策強制解除確認之判定步驟(S212)。關於S212或之後之步驟(S213、S214、S215、S303-2等)，係與第2(C)圖之情況相同。Further, in the determination step (S707) of the early combustion release temperature difference, when the condition of the t3-t2≦ early combustion release confirmation temperature difference SP is not satisfied, that is, the determination step of the early combustion countermeasure forced release confirmation (S212) is performed. . The steps S212 or the following (S213, S214, S215, S303-2, etc.) are the same as in the case of the second (C) diagram.
如同前述，宜為使早期燃燒解除確認SP較早期燃燒確認SP高(例如20至50℃)，且使早期燃燒解除確認溫度差SP較早期燃燒確認溫度差SP低(10至30℃)來設定，會容易抑制排氣溫度的上升。即使早期燃燒解除確認SP與早期燃燒確認SP相同，且早期燃燒解除確認溫度差SP與早期燃燒確認溫度差SP相同，亦能某種程度抑制因排氣淨化裝置之早期燃燒所導致之排氣溫度的上升。As described above, it is preferable to set the early combustion release confirmation SP to be higher than the early combustion confirmation SP (for example, 20 to 50 ° C), and set the early combustion release confirmation temperature difference SP to be lower than the early combustion confirmation temperature difference SP (10 to 30 ° C). It is easy to suppress the rise of the exhaust gas temperature. Even if the early combustion release confirmation SP is the same as the early combustion confirmation SP, and the early combustion release confirmation temperature difference SP is the same as the early combustion confirmation temperature difference SP, the exhaust temperature due to the early combustion of the exhaust purification device can be suppressed to some extent. Rise.
再者，前述排氣淨化處理運轉之結束(STOP)，係進行關閉排熱風門27並且將燃燒器25熄火，且進一步將外氣導入風門37開啟，關閉排氣阻斷風門43並停止送風機35。Further, at the end of the exhaust gas purification processing operation (STOP), the exhaust damper 27 is closed and the burner 25 is turned off, and the outside air is further introduced into the damper 37, the exhaust damper 43 is closed, and the blower 35 is stopped. .
此外，第2實施形態並不受限於第6圖所示之二塔式的排氣淨化裝置，與第1實施形態相同地，亦可適用於三塔式、四塔式、五塔式等，具有多數個蓄熱體之多塔式的排氣淨化裝置，進一步亦可適用於使用旋轉式切換閥24之旋轉式切換閥式的排氣淨化裝置。In addition, the second embodiment is not limited to the two-tower exhaust gas purification apparatus shown in Fig. 6, and can be applied to a three-tower type, a four-tower type, a five-tower type, etc., similarly to the first embodiment. A multi-tower exhaust gas purifying device having a plurality of regenerators can be further applied to a rotary switching valve type exhaust gas purifying device using a rotary switching valve 24.
在本實施形態之排氣淨化裝置中，微電腦(MC)係以下述方式進行控制：當滿足前述關係式(a)及(b’)之雙方時，即強制開啟排熱風門27，並在經過將燃燒器熄火之早期燃燒對策操作後，當變成未滿足前述關係式(c)、(d’)之一方或雙方時，將排熱風門27全閉，而經過早期燃燒對策解除操作。In the exhaust gas purifying apparatus of the present embodiment, the microcomputer (MC) is controlled such that when both of the above relational expressions (a) and (b') are satisfied, the exhaust damper 27 is forcibly opened and passed through When the early combustion countermeasures for extinguishing the burner are operated, when one or both of the above relational expressions (c) and (d') are not satisfied, the exhaust damper 27 is fully closed, and the early combustion countermeasure is released.
進一步，本實施形態之排氣淨化裝置501係判定蓄熱室溫度(t4)與燃燒室溫度(t1)之差值變為較正常值小時，即開始早期燃燒解除操作，故較使用前述關係式(b)之溫度控制方法(第1實施形態)，能更迅速地偵測到必須開始早期燃燒對策操作，因此，能實現更適當的淨化運轉。特別是是不憑藉處理風量之變化即能更迅速地偵測到必須開始早期燃燒對策操作。Further, in the exhaust gas purifying apparatus 501 of the present embodiment, it is determined that the difference between the regenerator temperature (t4) and the combustion chamber temperature (t1) becomes smaller than the normal value, that is, the early combustion releasing operation is started, so the above relational expression is used. b) The temperature control method (first embodiment) can detect that the early combustion countermeasure operation must be started more quickly, so that a more appropriate purification operation can be realized. In particular, it is possible to detect the need to start early combustion countermeasures more quickly without relying on changes in the amount of air handled.
1、501．．．排氣淨化裝置1, 501. . . Exhaust gas purification device
11．．．蓄熱體11. . . Heat accumulator
13．．．蓄熱室13. . . Regenerator
15．．．燃燒室15. . . Combustion chamber
17．．．供氣閥17. . . Air supply valve
19．．．排氣閥19. . . Vent
21．．．供氣口twenty one. . . Air supply port
22．．．回流配管twenty two. . . Reflux piping
23．．．排氣口twenty three. . . exhaust vent
24．．．旋轉式切換閥twenty four. . . Rotary switching valve
25．．．加熱燃燒器25. . . Heating burner
27．．．排熱風門27. . . Heat exhaust damper
29．．．餘熱排出口29. . . Waste heat discharge
31．．．排氣供給配管31. . . Exhaust supply piping
32．．．淨化氣體排出配管32. . . Purified gas discharge piping
33．．．淨化氣體排氣導管33. . . Purified gas exhaust duct
35．．．送風機35. . . Blower
37．．．外氣導入風門37. . . External air inlet damper
39．．．外氣導入口39. . . External air inlet
41．．．濾箱41. . . Filter box
43．．．排氣阻斷風門43. . . Exhaust block damper
45．．．大氣開放風門45. . . Atmospheric open damper
T1．．．第一溫度檢測器T1. . . First temperature detector
T2．．．第二溫度檢測器T2. . . Second temperature detector
T3．．．第三溫度檢測器T3. . . Third temperature detector
T4．．．第四溫度檢測器T4. . . Fourth temperature detector
第1圖係為顯示根據本發明第1實施形態之排氣淨化裝置(二塔式)的整體構成圖。Fig. 1 is a view showing the overall configuration of an exhaust gas purifying apparatus (two-tower type) according to the first embodiment of the present invention.
第2(A)圖係為顯示第1圖所示之排氣淨化裝置的運轉之預備加熱步驟的流程圖。Fig. 2(A) is a flow chart showing the preliminary heating step of the operation of the exhaust gas purifying device shown in Fig. 1.
第2(B)圖係為顯示第1圖所示之排氣淨化裝置的運轉之定常處理運轉步驟的流程圖。Fig. 2(B) is a flow chart showing the routine processing operation procedure for the operation of the exhaust gas purification apparatus shown in Fig. 1.
第2(C)圖係為顯示編入第1圖所示之排氣淨化裝置的運轉之定常處理運轉步驟的早期燃燒對策步驟的流程圖。The second (C) diagram is a flowchart showing the steps of the early combustion countermeasures in the steady-state processing operation step of the operation of the exhaust gas purification apparatus shown in Fig. 1.
第3圖係為顯示在本發明第1實施形態的排氣淨化裝置中，將排熱風門使用於燃燒室溫度的目標SP，以進行比例控制時之風門的張開程度與燃燒室溫度(t1)關係之線圖。Fig. 3 is a view showing the degree of opening of the damper and the combustion chamber temperature when the exhaust damper is used for the target SP of the combustion chamber temperature in the exhaust gas purifying apparatus according to the first embodiment of the present invention. ) A line graph of relationships.
第4圖係為顯示本發明可適用之排氣淨化裝置之其他例(三塔式)的整體構成圖。Fig. 4 is a view showing the overall configuration of another example (three-column type) of the exhaust gas purifying apparatus to which the present invention is applicable.
第5圖係為顯示本發明可適用之排氣淨化裝置之其他例(旋轉切換閥式)的整體構成圖。Fig. 5 is a view showing the entire configuration of another example (rotary switching valve type) of the exhaust gas purifying apparatus to which the present invention is applicable.
第6圖係為顯示本發明第2實施形態的排氣淨化裝置的整體構成圖。Fig. 6 is a view showing the overall configuration of an exhaust gas purification apparatus according to a second embodiment of the present invention.
第7圖係為顯示編入第6圖所示之排氣淨化裝置的運轉之定常運轉步驟(第2(B)圖)的早期燃燒對策步驟的流程圖。Fig. 7 is a flow chart showing the steps of the early combustion countermeasures in the normal operation step (Fig. 2(B)) of the operation of the exhaust gas purification apparatus shown in Fig. 6.
1．．．排氣淨化裝置1. . . Exhaust gas purification device
11．．．蓄熱體11. . . Heat accumulator
13．．．蓄熱室13. . . Regenerator
15．．．燃燒室15. . . Combustion chamber
17．．．供氣閥17. . . Air supply valve
19．．．排氣閥19. . . Vent
21．．．供氣口twenty one. . . Air supply port
23．．．排氣口twenty three. . . exhaust vent
25．．．加熱燃燒器25. . . Heating burner
27．．．排熱風門27. . . Heat exhaust damper
29．．．餘熱排出口29. . . Waste heat discharge
31．．．排氣供給配管31. . . Exhaust supply piping
32．．．淨化氣體排出配管32. . . Purified gas discharge piping
33．．．淨化氣體排氣導管33. . . Purified gas exhaust duct
35．．．送風機35. . . Blower
37．．．外氣導入風門37. . . External air inlet damper
39．．．外氣導入口39. . . External air inlet
41．．．濾箱41. . . Filter box
43．．．排氣阻斷風門43. . . Exhaust block damper
45．．．大氣開放風門45. . . Atmospheric open damper
T1．．．第一溫度檢測器T1. . . First temperature detector
T2．．．第二溫度檢測器T2. . . Second temperature detector
T3．．．第三溫度檢測器T3. . . Third temperature detector
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| WO2014010262A1 (en) * | 2012-07-12 | 2014-01-16 | 新東工業株式会社 | Regenerative exhaust gas purification device |
| JP6191832B2 (en) * | 2012-08-29 | 2017-09-06 | 新東工業株式会社 | Exhaust gas purification equipment and operation control method thereof |
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| EP2865943A4 (en) * | 2013-03-25 | 2016-03-02 | Sintokogio Ltd | Heat storage-type exhaust gas purification device |
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| JP6478785B2 (en) * | 2015-04-23 | 2019-03-06 | 中外炉工業株式会社 | Control method of regenerative gas processing device |
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