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为降低高温高压流体管道的制造成本,遵循耐温与耐压分离的原则,提出了一种耐温耐压的多层管道结构,并建立了计算该管道壁温的热力学模型,探讨了不同内管道外径时遮热管壁温、遮热管外半径和热流功率与遮热管数量的关系.结果表明:在内管道壁温为700℃时,随着遮热管数量的增加,外管道壁温迅速下降,最终可降至350℃以下,完全可以使用普通的钢材来制造耐压管道,大大降低了管道的制造成本.
In order to reduce the manufacturing cost of high temperature and high pressure fluid pipes and to follow the principle of temperature and pressure separation, a multi-layer pipe structure with temperature and pressure resistance was put forward and a thermodynamic model for calculating the pipe wall temperature was established. The results show that when the inner wall temperature is 700 ℃, with the increase of the number of heat shield pipe, the wall temperature of the outer pipe is rapidly Decline, and ultimately can be reduced to below 350 ℃, can use ordinary steel to manufacture pressure pipe, greatly reducing the pipe manufacturing costs.