Purging of the air separation pipeline for Xinjiang Tianzhi Chenye’s 100,000-ton ethylene glycol expansion project has begun

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Purging of air separation pipelines for Xinjiang Tianzhi Chenye’s 100,000-ton ethylene glycol expansion project has begun. Author/Source: Date: 2018-07-19 Views: 32. Recently, as the maintenance work at Tianzhi Chenye progresses steadily, good news came from the air separation unit associated with the 100,000-ton ethylene glycol expansion project – the main steam pipelines of this unit have completed pressure testing and are now in the purging phase, as part of the final preparations for starting up the turbines in the third phase of the air separation system. It is understood that this air separation unit was the subject of a supply contract signed between Kaifeng Air Separation Group and Tianzhi Chenye in October 2016. The unit utilizes a packing column, compression within liquid pumps, and a pre-purification process; that is, pre-purification is carried out using molecular sieves at room temperature, an air pressurization turbine expander provides the cooling required by the unit, air is pressurized and expanded, distillation takes place in two columns, and compression occurs within liquid pumps ； The entire air separation unit employs DCS system control technology. It is reported that Tianzhi Chenye formulated and implemented a series of scientific and rigorous plans for the purging, testing, and commissioning of high-pressure steam pipelines, thereby further ensuring the successful first-time commissioning of the air separation unit. Since the beginning of this year, in order to achieve the set goal of completing and putting the project into operation on schedule, Tianzhi Chenye’s 100,000-ton construction project has accelerated its progress. A reward system has been implemented for the installation units involved in the project, in line with the construction timeline, to further boost morale and speed up the project’s development. Thanks to the day-and-night efforts of the workers at Tianye Construction, good news came from the air separation unit site regarding the pressure testing and purging processes. It can be said that the construction of this project embodies the dedication and wisdom of the people at Tianye, as well as the responsibilities and missions of every worker at Tianzhi Chenye. It is understood that the third-phase air separation unit was designed by Kaifeng Air Separation Co., Ltd., and it supplies the oxygen, nitrogen, instrument air, compressed air, liquid oxygen, and liquid nitrogen necessary for production, ensuring the safe and stable operation of the entire plant.