Why was the wax oil hydrogenation unit the second facility to come online at Hengli Petrochemical? ? ?
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At 15:58 on January 14, the first batch of diesel produced by the wax oil hydrogenation unit of the 20 million tons per year integrated refining and chemical project at Hengli (Dalian) Petrochemical, constructed by the 10th Construction Company of Refining and Chemical Engineering, was successfully introduced into the production system. This was achieved one day ahead of the target set by the project owner, marking the entry of this project into the phase of operational production. It is understood that this oil inlet pipeline constitutes the initial section of the feed for Unit 2B of the wax oil hydrogenation unit, with a length of approximately 1,045 meters. Diesel is introduced from the utility corridor at the plant boundary, flows through heat exchangers and filters, and then reaches the V4101 tank cluster. @great.wang @RedLee_ZZHI @liuquan1100 @ZhiZheMing @ylb913 Since New Year’s Day 2019, all the personnel involved in the project, under the scientific planning and careful organization of the project management team, have focused on what the clients needed and addressed the urgent requirements related to the start of construction. They took various measures to overcome the adverse effects of the low temperatures in the Dalian area, used pressure testing of the process pipelines to help complete the project, worked overtime to speed up progress, and ensured that the key construction tasks were carried out safely, with high quality and efficiency, prior to the start of operations. Through 14 days of strenuous efforts by all the personnel involved in the project, the material supply target set by the client was ultimately achieved. In light of the increased risks and potential hazards before and after material feeding into the facility, as well as the heightened difficulties in safety management, the project department issued notices in advance, requiring all subcontractor teams to strictly adhere to the work order system. It also emphasized the need to make full use of Monday’s safety meetings and pre-shift meetings to provide thorough instructions to all employees, as well as to conduct retraining, further education, and additional training on safety procedures after material feeding begins. In addition, clear signs were to be placed on the valves within the facility’s boundary areas, these valves were to be locked, and warning zones were to be established to ensure absolute safety during the facility’s operation and material feeding process. At present, the personnel working on the project team cooperate closely with the owners’ workshop staff 24/7 to ensure the continuous operation of the wax oil hydrogenation unit after material feeding. At the same time, the team leaders in charge of various aspects of the project went straight to the construction site to organize the remaining work ahead of and after the Spring Festival, and continued to refine the construction plan for the final stages of the project, thereby laying a solid foundation for the successful commissioning of the entire Hengli (Dalian) Petrochemical Integration Project on schedule.
From Hengli Changxing Island in Dalian, to Yushan Island in Zhoushan, Zhejiang, and then to Donghai Island in Zhanjiang, Guangdong, I’ve heard that Shijian Company has completed quite a number of projects recently, and it is thriving.
In terms of the sequence of operations, the steam/diesel hydrogenation unit should be started first, followed by the wax oil hydrogenation unit and the residue oil hydrogenation unit. Perhaps considering the difficulty in starting up the paraffin oil hydrogenation unit, diesel is purchased externally for startup.
I wonder if there is any presence of Shijian on Pulau Mora in Brunei Darussalam?
Brunei doesn’t have it; in Brunei, it’s China National Chemical Engineering Group that is responsible for the work, with Sinochem Second Construction Company handling the hydrogenation tasks.
Is starting the fractionation section considered to be starting up the plant, with the cracking feed oil being used in that process?
(1) Hengli does not have diesel hydrorefining. (2) The tail oil from diesel hydrocracking is fed into the wax oil hydrogenation unit; it represents a upstream-downstream relationship. (3) Diesel produced by the hydrogenation of wax oil is fed into the diesel hydrocracking unit.
The catalyst for the hydrocracking of wax oil uses low-nitrogen diesel as the sulfurizing oil. The tail oil from wax oil hydrocracking is sent to catalytic cracking units, ethylene plants, and lubricating oil production facilities. It can also operate in full circulation of tail oil.
Bro, it seems that Hengli’s wax oil hydrocracking unit hasn’t started operating yet, right?
Indeed, it’s still in the testing phase. On February 11th, the compression unit C4101 of the wax oil hydrogenation unit in Hengli (Dalian) Petrochemical’s 20 million tons per year integrated refining and petrochemical project, which was constructed by the 10th Construction Company for refining and chemical engineering projects, completed its initial test successfully, marking the full commencement of compressor testing for this unit. It is understood that the compression units of this facility are centrifugal types for circulating hydrogen, with a total of 8 units, and they constitute the core of the entire facility. The maximum temperature of the medium gas in the compressor unit is 150 ℃, while the standard steam temperature is 450 ℃. As Hengli (Dalian) Petrochemical is located in the Changxing Island area of Dalian, the site has been under cold weather conditions since the Spring Festival, which has had a negative impact on the temperature of the steam used in the commissioning of the compression units, resulting in a slower progress in the commissioning process. To this end, the responsible persons for various aspects of the compressor unit in the project team worked closely with the owner and supervisor during the Spring Festival, continuously optimizing the commissioning plan. After multiple cycles of increasing steam temperature and pressure, the commissioning process gradually got on track. Ultimately, it was achieved that the compressor unit operated stably with all parameters within normal ranges, and the commissioning was successful on the first attempt. It became the first unit in the entire plant to commence compressor unit commissioning, successfully meeting the owner’s set objectives and earning unanimous recognition from all parties. During the installation of the compressor unit, the project team mobilized its most skilled personnel to carry out the work. All personnel involved in the construction maintained a commitment to excellence in their work. Information regarding the installation procedures for compressor units, the relevant regulations, and the performance characteristics of compressors was displayed on signs placed in prominent locations within the factory, serving as a constant reminder to the installers to pay close attention to every step of the process. At the same time, in accordance with the owner’s schedule requirements, the project team carefully detailed the daily work plans for each task team, ensuring that responsibilities were assigned to specific individuals. This approach helped keep the safety, quality, and progress of the compressor unit construction under control, thereby creating favorable conditions for the successful first trial run of the compressor unit.