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当前位置 -> 热风炉热风炉知识怎样去判断燃煤热风炉的热效率 发布时间:(9/2)浏览次数:107

怎样去判断燃煤热风炉的热效率

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燃煤热风炉的节能效果不仅是对国家节能减排环保提倡的响应,也为工厂本身降低了生产成本,提高了经济性。燃煤热风炉在各行各业应用广泛,它的节能效果是它重要的一个优点。燃煤热风炉的节能效果无法直接评判,但是它在热效率、热能交换率、耗能量等多个指标上有体现。热效率的高低取决于干燥方法的不同,一般传导式干燥的热效率从理论上来说可以达到100%,如果是采用对流式干擦,热效率只能达到70%左右。
The energy-saving effect of coal-fired hot blast stove is not only a response to the national energy-saving, emission reduction and environmental protection advocacy, but also reduces the production cost and improves the economy of the plant itself. Coal-fired hot blast stove is widely used in all walks of life, its energy-saving effect is an important advantage. The energy-saving effect of coal-fired hot blast stove can not be directly evaluated, but it is reflected in many indicators such as thermal efficiency, heat energy exchange rate, energy consumption and so on. The thermal efficiency depends on the different drying methods. Generally, the thermal efficiency of conductive drying can reach 100% in theory. If convective drying is used, the thermal efficiency can only reach about 70%. 热能交换率的高低,取决于热交换器的换热面积,前提是在同样结构的情况下。另外如果有整体保温隔热设计,可以宝热损耗降到最低,进而可以提高热能交换率。从热能交换率这里可以得到判断燃煤热风炉节能效果的最根本的一条方法,就是达到相应热风温度后,热风经过热交换器放出的烟气的温度高低。烟气的温度高,则说明热交换率低,节能效果较差;反之,烟气温度低,热交换率高,节能效果较好。
The heat exchange rate depends on the heat exchange area of the heat exchanger, provided that the same structure is used. In addition, if there is an overall thermal insulation design, Bao heat loss can be reduced to the lowest, which can improve the heat exchange rate. From the heat energy exchange rate, we can get the most fundamental method to judge the energy-saving effect of coal-fired hot-blast stove, that is, the temperature of the flue gas released by the hot-blast through the heat exchanger after reaching the corresponding hot-blast temperature. The higher the temperature of flue gas, the lower the heat exchange rate and the worse the energy saving effect; on the contrary, the lower the temperature of flue gas, the higher the heat exchange rate and the better the energy saving effect.
耗能量是一个综合性的指标,耗能量低,是指在相同的烘干效果下,所耗能量低,也就是说热效率高,热的损耗少,也可以从这里判断出燃煤热风炉的节能效果。
Energy consumption is a comprehensive index, low energy consumption, refers to the same drying effect, low energy consumption, that is, high thermal efficiency, less heat loss, can also be judged from here the energy-saving effect of coal-fired hot blast stove.


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