-
公开(公告)号：EP0514999A3
公开(公告)日：1993-06-16
申请号：EP92201476.6
申请日：1992-05-21
摘要： An apparatus (10) having an incineration chamber (12) and at least one burner (14,16) for oxidizing fumes is provided. First and second regenerators (18,20) are in fluid communication with the incineration chamber, as is a bypass (22) which introduces unburnt fumes to the incineration chamber without passing them through either of the regenerators. While the fumes are in the bypass, a purging device (24), including a purge fan (56) and accompanying conduits (52,54) and valves (58), introduces a purge gas to either one of the regenerators to force unburnt fumes therefrom. The purged fumes and the purge gas are mixed with the incoming fumes from the bypass in an annular plenum (47) downstream of the purged regenerator before they are introduced to the incineration chamber for oxidation. The flow of incoming fumes to the system may be continuous, even during purging, and the purge fan may also be continuously operated.
-
公开(公告)号：EP0773406A3
公开(公告)日：1997-12-10
申请号：EP96203041.7
申请日：1996-10-31
摘要： The present invention is directed to a method which significantly improves the efficiency of reducing nitrogen oxide formation and emission during incineration of a waste gas in an air-staged thermal oxidizer. In accordance with the present invention, a natural gas stream (12) is mixed with combustion air (18) in a burner (16) and the mixture is ignited with the immediate introduction of liquid water (19). Thus, the resulting mixture is then injected into a first reducing zone (2) which is fuel rich in order to begin the combustion process, but retard the formation of nitrogen oxides. The waste gas (8) exiting the reducing zone is deficient in oxygen due to the fuel rich atmosphere in the first reducing zone and cooler due to the water cooling as it enters the second oxidizing zone. In the second oxidizing zone (4), additional oxygen in the form of air (20) is injected to complete the combustion process. Due to the fact that the waste gas is cooler in the oxidizing zone, the peak temperature resulting from completion of combustion reactions is lower and thermal nitrogen oxide formation is minimized in the second oxidizing zone. In another embodiment, the method of the present invention further includes the step of mixing chemical reagents (25,26) with the cooling water prior to injection into either the reducing zone, the oxidizing zone, or both, to chemically reduce nitrogen oxides present in gases emanating from the reducing zone and to reduce formation of nitrogen oxides in the oxidizing zone.
摘要翻译： 本发明涉及一种显着提高在空气分级热氧化器中焚烧废气期间减少氮氧化物形成和排放的效率的方法。 根据本发明，天然气流（12）在燃烧器（16）中与助燃空气（18）混合，并且立即引入液态水（19）将混合物点燃。 因此，所得到的混合物然后被注入到富含燃料的第一还原区（2）中，以开始燃烧过程，但阻止氮氧化物的形成。 从还原区排出的废气（8）由于第一还原区中的富含燃料的气氛而缺乏氧气，而当进入第二氧化区时由于水冷却而冷却。 在第二氧化区（4）中，注入空气（20）形式的额外氧气以完成燃烧过程。 由于氧化区中的废气较冷，因此完成燃烧反应所产生的峰值温度较低，并且在第二氧化区中热氮氧化物的形成被最小化。 在另一个实施方案中，本发明的方法进一步包括在注入还原区，氧化区或二者之前将化学试剂（25,26）与冷却水混合的步骤，以化学还原存在于 从还原区发出的气体以及减少氧化区中氮氧化物的形成。
-
公开(公告)号：EP0514999B1
公开(公告)日：1995-12-20
申请号：EP92201476.6
申请日：1992-05-21
-
公开(公告)号：EP0514999A2
公开(公告)日：1992-11-25
申请号：EP92201476.6
申请日：1992-05-21
摘要： An apparatus (10) having an incineration chamber (12) and at least one burner (14,16) for oxidizing fumes is provided. First and second regenerators (18,20) are in fluid communication with the incineration chamber, as is a bypass (22) which introduces unburnt fumes to the incineration chamber without passing them through either of the regenerators. While the fumes are in the bypass, a purging device (24), including a purge fan (56) and accompanying conduits (52,54) and valves (58), introduces a purge gas to either one of the regenerators to force unburnt fumes therefrom. The purged fumes and the purge gas are mixed with the incoming fumes from the bypass in an annular plenum (47) downstream of the purged regenerator before they are introduced to the incineration chamber for oxidation. The flow of incoming fumes to the system may be continuous, even during purging, and the purge fan may also be continuously operated.
摘要翻译： 提供了一种具有焚烧室和至少一个用于氧化烟雾的燃烧器的设备。 第一和第二再生器与焚化室流体连通，如同将旁路一样的旁路，其将未燃烧的烟雾引入焚化室，而不通过任何一个再生器。 当烟雾在旁路中时，清洗装置，包括吹扫风扇和相应的管道和阀，将净化气体引入任一个再生器，以迫使其中的未燃烧的烟雾。 在被吹扫的烟气和净化气体被引入到焚烧室中之前，在被吹扫的再生器的下游的环形增压室中，来自旁路的进入的烟气与吹扫的气体混合。 进入烟雾的系统的流动可能是连续的，即使在清洗过程中，吹扫风扇也可以连续运行。
-
公开(公告)号：EP0773406A2
公开(公告)日：1997-05-14
申请号：EP96203041.7
申请日：1996-10-31
摘要： The present invention is directed to a method which significantly improves the efficiency of reducing nitrogen oxide formation and emission during incineration of a waste gas in an air-staged thermal oxidizer. In accordance with the present invention, a natural gas stream (12) is mixed with combustion air (18) in a burner (16) and the mixture is ignited with the immediate introduction of liquid water (19). Thus, the resulting mixture is then injected into a first reducing zone (2) which is fuel rich in order to begin the combustion process, but retard the formation of nitrogen oxides. The waste gas (8) exiting the reducing zone is deficient in oxygen due to the fuel rich atmosphere in the first reducing zone and cooler due to the water cooling as it enters the second oxidizing zone. In the second oxidizing zone (4), additional oxygen in the form of air (20) is injected to complete the combustion process. Due to the fact that the waste gas is cooler in the oxidizing zone, the peak temperature resulting from completion of combustion reactions is lower and thermal nitrogen oxide formation is minimized in the second oxidizing zone. In another embodiment, the method of the present invention further includes the step of mixing chemical reagents (25,26) with the cooling water prior to injection into either the reducing zone, the oxidizing zone, or both, to chemically reduce nitrogen oxides present in gases emanating from the reducing zone and to reduce formation of nitrogen oxides in the oxidizing zone.
摘要翻译： 本发明涉及一种显着提高在空气分级热氧化器中废气焚烧期间减少氮氧化物形成和排放的效率的方法。 根据本发明，天然气流（12）与燃烧器（16）中的燃烧空气（18）混合，并且立即引入液体水（19）来点燃该混合物。 因此，然后将所得混合物注入到燃料富集的第一还原区（2）中以开始燃烧过程，但是阻止氮氧化物的形成。 离开还原区的废气（8）由于在进入第二氧化区域时由于水冷而由于第一还原区中的富燃料气氛和冷却器而缺氧。 在第二氧化区（4）中，注入空气（20）形式的附加氧气以完成燃烧过程。 由于废气在氧化区域较冷，燃烧反应完成的峰值温度较低，第二氧化区中的热氮氧化物形成最小。 在另一个实施方案中，本发明的方法还包括将化学试剂（25,26）与冷却水混合在还原区，氧化区或二者之间的步骤，以化学还原存在于 从还原区发出的气体并减少氧化区中氮氧化物的形成。
-
6.发明公开
公开(公告)号：EP0593121A1
公开(公告)日：1994-04-20
申请号：EP93202843.4
申请日：1993-10-06
CPC分类号： F23D14/14 , F23D14/02 , F23D14/82 , F23D2203/104
摘要： A premix burner has a mixing plenum, a mesh flametrap (32) and a ceramic honeycomb (34) arranged in series. The mixing plenum has inner (20) and outer (18) chambers, with a mixing nozzle (24) for introducing a gaseous fuel concentrically located in the inner chamber. The burner is operated with either high excess air or flue gas recirculation to produce a low temperature flame at a flame face defined by the honeycomb. The thorough premixing of air and fuel ensures a flame with homogeneous air-to-fuel ratios across the flame face, producing low NOx levels. The honeycomb and flametrap also function as flame arrestors to prevent burner flashback. A method for attaining a low temperature, low NOx flame using excess air, with or without flue gas recirculation, is also disclosed.
摘要翻译： 预混燃烧器具有混合气室，串联的网状火焰（32）和陶瓷蜂窝（34）。 混合气室具有内部（20）和外部（18）腔室，其中混合喷嘴（24）用于引入同心地位于内部腔室中的气体燃料。 燃烧器以高过量空气或烟道气再循环运行，以在由蜂窝体限定的火焰面处产生低温火焰。 空气和燃料的彻底预混合确保火焰在火焰面上具有均匀的空气 - 燃料比，从而产生低NOx水平。 蜂巢和火焰灭火器也起到阻火器的作用，防止燃烧器反光。 还公开了一种使用过量空气来实现低温，低NOx燃烧的方法，其具有或不具有烟道气再循环。
-
-
-
-
-
搜索结果
6 条记录 (耗时 0.009 秒)
