Equipment, operating conditions and troubles as well as investment costs for two hydraulic decoking mods, i. e, with and without derrick in delayed coking unit were introduced and compared.

• 介绍了延迟焦化装置有井架与无井架两种水力除焦方式的投资、设备、主要故障及生产情况，并进行了比较。由于高压水龙带胶管、水涡轮等产品的改进和质量的提高，无井架除焦逐渐显示出其优越性。