In view of the global energy crisis, energy saving in high-temperature thermal production is urgent. The traditional rock wool and composite silicate board cannot meet the requirements of high efficiency thermal insulation for heavy oil recovery pipe due to their poor insulation performance, and the emerging SiO₂ aerogel production has poor shielding ability to infrared thermal radiation, resulting in limited application at high temperature industry. In this study, a novel SiO₂-TiO₂ composite aerogel was synthesized by synchronous sol-gel technique instead of simply particle doping method, high temperature hydrophobic property was obtained by surface modification and pre-heat treatment. The structure characterization, thermal conductivity test, infrared radiation heat transfer calculation and energy saving simulation calculation of SiO₂-TiO₂ composite aerogel were carried out, and the thermal insulation performance evaluation of high temperature steam pipes application was obtained accordingly. Compared with glass fiber/SiO₂ aerogel, the thermal conductivity of glass fiber/SiO₂-TiO₂ composite aerogel has achieved a 13.1% and 23.9% reduction in thermal conductivity at 300 °C and 400 °C, respectively. Energy saving simulation results showed that glass fiber/SiO₂-TiO₂ composite aerogel can save 31.94 wt% and 55.44 wt% of oil consumption annually comparing to the commonly used rock wool and composite silicate. At the same time, large hydrophobic angle (143.7°) and good stability are the guarantees for its long-term service under the complicated environment. To sum up, glass fiber reinforced SiO₂-TiO₂ composite aerogel can serve as super insulation to replace traditional insulation layer and pure SiO₂ aerogel product in the field of ground steam pipes application.

鉴于全球能源危机，迫切需要在高温热力生产中节约能源。传统的岩棉和复合硅酸盐板由于隔热性能差，不能满足重油回收管高效隔热的要求，而新兴的SiO ₂气凝胶生产对红外热辐射的防护能力也很差，导致其应用受到限制。高温行业。在这项研究中，一种新型的SiO ₂ -TiO ₂通过同步溶胶-凝胶技术代替简单的颗粒掺杂方法合成了复合气凝胶，通过表面改性和预热处理获得了高温疏水性。对SiO ₂ -TiO ₂复合气凝胶进行了结构表征，导热系数测试，红外辐射传热计算和节能模拟计算，据此获得了高温蒸汽管道应用的绝热性能评价。与玻璃纤维/ SiO ₂气凝胶相比，玻璃纤维/ SiO ₂ -TiO ₂的导热系数复合气凝胶在300°C和400°C下的热导率分别降低了13.1％和23.9％。节能模拟结果表明，与常用的岩棉和复合硅酸盐相比，玻璃纤维/ SiO ₂ -TiO ₂复合气凝胶每年可节省31.94 wt％和55.44 wt％的油耗。同时，疏水角大（143.7°）和良好的稳定性是其在复杂环境下长期使用的保证。综上所述，玻璃纤维增​​强的SiO ₂ -TiO ₂复合气凝胶可作为地暖，代替地面蒸汽管道应用领域中的传统保温层和纯SiO ₂气凝胶产品。