加氢反应炉空气预热系统改用热管预热器后，炉子热效率提高了约3%。
After the air preheater system of hydrogenated reaction furnace changes into heat tube preheater, the heat efficiency of furnace increases about 3%.
采用这些技术后，提高了炉子的自动化程度、炉子热效率和热处理水平。
After making use of these new tech-nics, the automation level, thermal efficiency and heat treatment level of furnace are raised.
其设计指导思想是，最大程度地回收炉子的烟气余热，提高炉子热效率。
Its design concept is to recuperate flue gas and increase heat efficiency of furnace at a maximum extent.
工业炉窑烟气余热回收利用，是提高炉子热效率、节约炉用燃料的极为有效的途径。
Recycle and utilization of waste heat in exhaust fume of industrial furnaces is the efficient way enhancing furnace heat efficiency and saving fuel used by furnace.
不同的炉子应采用不同的热处理工艺，明火炉d V值较高，温度高、车速快，可以提高热效率。
The temperature of open-fire furnace is higher, the speed of steel wire must be fast, so the DV value of the furnace is higher and the heat efficiency can be raised.
还原炉是卧式布置。炉子加热启动快，热惯性小，保温效果好，热效率高。
The furnace is horizontal, which is characterized by fast starting, low heat inertia, good isolation and high heating efficiency.
还原炉是卧式布置。炉子加热启动快，热惯性小，保温效果好，热效率高。
The furnace is horizontal, which is characterized by fast starting, low heat inertia, good isolation and high heating efficiency.
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