With the characteristics of long-flame and high temperature, down-fired boilers are used burn coals with low volatiles such as anthracite.

型火焰锅炉以其自身的炉膛温度高、火焰行程长等特点，适于燃烧无烟煤等低挥发分燃料。

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But the impact strength of PP is not high, low temperature issued crisp, easy to burn.

但是聚丙烯的抗冲击强度不够高，低温下发脆，容易燃烧。

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The ether energy obtained by the preparation method can be easier to burn, has low solidifying point and is favorable for being used in the low temperature environment.

通过该制备方法得到的醚类能源能更易于燃烧，且其凝点低，有利于在低温环境中使用。

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