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节能一般有二类方法。一类是重视物流的方法,即从物质流动的效率化观点,将工艺分为简略化、连续化和复合化。有关简略化和连续化的实例较多,如熔融还原和连铸等工艺,但有关复合化的实例不多见。近几年,有些国家将不同种的生产行业进行了复合,如将生产化工原料甲醇的化工厂和炼铁厂复合在一起。由于甲醇不仅作为化工原料,而且作为汽车燃料受到大家的重视,其需求量日益增长。由于使用甲醇后汽车尾气中的NO、CO、HC等有害气体均明显减少,美国一部分州还制定了使用混合甲醇汽油的规定,日本的运输省也推出了到2000年争
There are generally two types of energy-saving methods. One is the method of attaching importance to logistics, that is, from the efficiency of material flow point of view, the process is divided into simplified, continuous and complex. There are many examples of simplification and continuity, such as melt reduction and continuous casting, but rare cases of compounding. In recent years, some countries have combined different kinds of production industries, such as the chemical plant that produces chemical raw material methanol and ironworks. As methanol not only as a chemical raw material, but also as a car fuel by everyone’s attention, its demand is growing. Since the use of methanol in automobile exhaust NO, CO, HC and other harmful gases were significantly reduced, some states in the United States also formulated the provisions of the use of mixed methanol gasoline, the Japanese Ministry of Transportation also launched the war in 2000