Design and application of waste heat recovery system of Western Crude Oil Pipeline

After heated in winter, the temperature of the outlet oil in the Western Crude Oil Pipeline gets 50 ℃to 55 ℃, resulting in not only damage to the pipeline coating, but also energy waste. Hence, crude oil heating systems of pump stations in Urumqi and Shanshan have been reconstructed to recover the waste heat. Based on the original heat medium exchanger, oil-to-oil heat exchanger has been installed to allow the heat exchange between heated oil and inlet cold oil. The waste heat of the crude oil is recovered after comprehensive heat treatment. By doing this, not only the requirements of comprehensive heat treatment of crude oil at 65 ℃ and exporting oil at 40 ℃ are met, but also the purpose of energy saving and wastage reduction is achieved, and nearly 30% energy savings is realized. At the same time, the application of oil-to-oil heat exchangers in winter can prevent the pump from shutting down caused by excessively high oil temperature and some cold oil from getting into the downstream at the situation of emergent shutdown and restart, and also make the outlet requirements of quench heat treatment satisfied.