1、材料科学与工程学院毕业论文 （ 设计 ） 外文文献报告 外文文献报告 附：文献调研报告 Oxygen-enriched combustion in kiln applications In recent years， domestic ceramic industry developing fast， especially the kiln in architectural ceramics industry wide application. Ceramic industry is at present large industrial users increasingly nervous
2、energy， status， and how to improve the kiln heat utilization rate of burned appears very important. And rich oxygen technology application in kiln for solving this problem provides a kind of way。 First， oxygen-enriched combustion technology in foreign application in industry。 As early as 1982， the U
3、nited States， Japan， Britain， France and other countries to be engaged in membrane technology of oxygen enrichment development and use。 They from membrane materials， film technology， components and devices and other aspects of the product production， production amplification， process design， process
4、 optimization and combustion application research work， and analyzed detection method and the development of analytical instruments such as oxygen concentration， eventually developed for 28% - 40 % oxygen-enriched air， device， from a few liters/gas production 1000m 3 / h cents to different specifica
5、tions of products， and the industrial application experiment， a gas， oil and coal under the different occasions， confirmed 30 % test， the concentration of oxygen-enriched air can be used for industrial combustion which use the 23% of oxygen-enriched air combustion can energy-saving 10% - 25%. To the
6、 end of 1980s， Japan subsequently has nearly 20 size company launched membrane rich oxygen device. In rich oxygen aid-combustion in Osaka， Japan gas company and panasonic company to cooperate， in billet heating test furnace， ceramics firing a furnace， glass kiln on practical application， and obtaine
7、d good effect in energy saving。 Second， oxygen-enriched combustion technology energy-saving and control pollution mechanism。 1. Raise the flame temperature: Oxygen-enriched air to participate in relative amount of nitrogen after combustion， thus make oxygen decrease rapidly and combustible mix to ac
8、hieve full combustion， make the flame temperature as oxygen-enriched air of the carbon ratio increased with the accelerated， and radiation， conduction， convection of the three forms of heat transfer rate。 材料科学与工程学院毕业论文 （ 设计 ） 外文文献报告 2. Accelerate burning rate Fuel burn in oxygen-enriched air speed r
9、eason: is due to increased oxygen content， so that the flame temperature increase in oxygen， such as natural gas caused the combustion rate than in normal air speed can improve the burning 10 times。 Burning rate rise， lead to fuel the chamber of a stove or furnace quickly complete combustion。 3. To
10、reduce fuel burn temperature Flash point temperature clearly influenced by the reaction rate and the influence of heat loss。 Oxygen-enriched air than ordinary air helps to reduce burn temperature characteristics， and increase the heat release flame quantity of unit volume。 For inferior fuel effect m
11、ore prominent。 4. Reduce the displacement after combustion Use oxygen levels for 29% of oxygen-enriched air to burning， and ordinary air burning comparison， when excess air coefficient is a = 1， 20% less volume， the exhaust smoke heat loss also decreased by 20%， thus improving the thermal efficiency
12、 and energy saving。 5. Increase heat utilization rate When heating temperature of 1300 DHS， use common air when C combustion. Its thermal utilization at 42%， but by oxygenation 26% of oxygen-enriched air combustion， the utilization rate increased to 56% ， with heating temperature increases ， energy-
13、saving better effect。 6. Reduce air surplus coefficient Oxygen-enriched combustion can effectively reduce air surplus coefficient， make exhaust heat loss， so as to improve drastically lower thermal efficiency and energy saving kiln。 Third， roller kiln local increasing oxygen technology basic charact
14、eristics . Currently get oxygen into kiln have oxygen - fuel spray gun， air - oxygen - fuel spray gun， secondary air zofran and gun under local gush oxygen etc four basic methods. The top three species overall increase gas measures， the latter for local add oxygen。 In the combustion system designing
15、 a roller kiln， must consider the following five factors。 (1).Will fuel heat maximum transfer to the glass； (2). Will the burning heat transfer to the minimum upper structure； roller (3). Avoid flame washed into refractory material surface； (4). The fuel and the combustion air effective mix， in orde
16、r to reduce the flue caused by air in the excess heat loss。 材料科学与工程学院毕业论文 （ 设计 ） 外文文献报告 Fourth， conclusion (1) oxygen-enriched combustion technology and total oxygen burning technology in industrial furnaces， will give the successful application of enterprise to bring huge economic benefits and soci
17、al benefits， have broad application prospect。 (2) oxygen-enriched combustion compared with traditional combustion way way， have energy-saving， increase flue gas radiation ability and shorten the heating time， increase production， etc。 (3) in the future application of metallurgical industry furnaces
18、oxygen-enriched combustion technology， pay attention to the following problems: highly efficient and clean system optimal oxygen-enriched combustion furnace type； Widen fuel use scope， undertake furnace pressure and furnace gas component effective control； Meanwhile the key development practical， re
19、liable low NOx emissions of engineering technology。 One pure oxygen concentration dilution mixer and oxygen-rich burner is the key technology， should put certain human conduct targeted research and development。 (4) some Chinese are battling for the city and the city built international famous scenery tourist city is likely to take the lead in using the developed countries， the environmental protection standard of other parts of the environmental protection also is valued. Total oxygen burning technology will be in our country has promoted。
