[Haichuan Chemical News] Shaanxi Jingyi Chemical’s 500,000 tons/year coal tar deep processing and multi-product integrated production project is entering its final stages
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The 500,000 tons per year coal tar deep processing and multi-product integrated utilization project at Shaanxi Jingyi Chemical Co., Ltd. is entering its final stages. Recently, the company has made every effort to complete the final work related to this project, advancing the commissioning of the production facilities; full-scale trial production is expected to begin by the end of June. To date, 96% of the work for this project has been completed; the civil construction is virtually finished, and the equipment installation is almost complete. The hydrogen production heat recovery unit, the hydrogen production PSA unit, the oil pretreatment unit, and the oil PSA unit are ready for commissioning. All compressors, except those in the refrigeration station, are ready for individual testing. Activities such as pipeline purging, pressure testing, flushing, inspection of equipment internals, and unit commissioning are progressing in an orderly manner as planned; significant progress has been made in the commissioning of large-scale units and pipeline purging. Of the 56 public external pipeline networks, 49 have been purged and flushed and are ready for operation ； All pipes within the plant area that meet the conditions for purging have been purged. Regarding individual unit testing, 12 out of the 28 reciprocating compressors have already been tested, with the remaining 16 scheduled to be tested by April 20. By the end of April, all civil engineering works are expected to be completed, and utility systems such as the fire water system, finished product storage areas, and external utility pipelines will all be put into operation. Multiple units, including air separation, purification, methanol synthesis, methanol distillation, oil pretreatment, and PSA, will complete their construction phases. By then, individual unit tests will gradually give way to system integrated tests. It is understood that the total investment in this project is 4.6 billion yuan, and it mainly includes: a 550,000-ton/year coal tar pretreatment unit, a 500,000-ton/year coal tar fluidized-bed hydrocracking unit, a 450,000-ton/year coal tar fixed-bed hydrocracking unit, a 400,000-ton/year naphtha continuous reforming unit, a 170,000-ton/year aromatic extraction unit, a 50,000 cubic meters per hour coal-to-hydrogen production unit, a 50,000 cubic meters per hour air separation unit, a 100,000-ton/year methanol synthesis unit, as well as related supporting facilities such as hydrogen purification (PSA) units, sulfur recovery units, phenol-amine recovery units, storage and transportation systems, as well as other auxiliary and environmental protection systems.
On November 2, 2019, at 22:26 on October 30, good news came from the power center of Shaanxi Jingyi Chemical Co., Ltd.: the steam turbine engine of Unit 1 was successfully started and maintained at a speed of 3,000 revolutions per minute. This marked a significant achievement in the commissioning process of Unit 1’s complete set of equipment, creating favorable conditions for the subsequent 168-hour trial operation of the unit.
At 8:28 on October 30, the No. 1 boiler in the power plant was started up. After more than 3 hours of heating and pressure building, at 18:41, the turbine began to operate. Following low-speed, medium-speed, and high-speed warm-up phases, at 22:26, the No. 1 turbine reached its rated speed of 3000 rpm, with parameters such as temperature and vibration remaining normal and stable. Subsequently, the turbine team will carry out OPC overspeed tests, electrical overspeed tests, main steam valve tightness tests, and control valve tightness tests, while the electrical team will conduct pre-grid connection tests such as no-load tests, short-circuit tests, and pseudo-synchronization tests, marking the successful completion of the commissioning of the turbine generator in Unit 1 of Lean Chemical Company’s Power Center.
Shaanxi Jingyi Chemical Co., Ltd. is a new-type coal chemical enterprise jointly invested in by Shaanxi Yulin Energy Group Co., Ltd. (as the holding party), Shaanxi Hengyuan Investment Group Co., Ltd., and Shenmu Financial Holding Group Co., Ltd. Leveraging the abundant resources of coal, coal tar, and coal-derived naphtha in northern Shaanxi, it explores new ways for the clean, differentiated utilization of coal in accordance with a three-step development strategy. The first phase of this project, with a capacity of 500,000 tons per year for the deep processing and integrated utilization of coal tar, is the first coal-based aromatics project in China. It is located in the Jinjie Industrial Park in Shenmu, Shaanxi Province. The project utilizes a combination of boiling-bed hydrogenation for quality improvement of coal tar across all fractions and fixed-bed hydrocracking; it uses medium- and low-temperature coal tar as raw material to produce high-value chemical products derived from aromatics. It achieves comprehensive and systematic differentiated, in-depth utilization of coal, representing a new industrialized approach to coal conversion and utilization. The estimated investment for the project is 4.6 billion yuan, and construction began in August 2017.
The project mainly includes a 550,000-ton/year coal tar pretreatment unit, a 500,000-ton/year coal tar fluidized-bed hydrocracking unit, a 450,000-ton/year coal tar fixed-bed hydrocracking unit, a 400,000-ton/year naphtha continuous reforming unit, a 170,000-ton/year aromatic extraction unit, a 50,000 cubic meters per hour coal-to-hydrogen unit, a 50,000 cubic meters per hour air separation unit, and a 100,000-ton/year methanol synthesis unit. It also includes related supporting facilities such as hydrogen purification (PSA) units, sulfur recovery units, phenol-amine recovery units, storage and transportation systems, as well as other auxiliary and environmental protection systems.
On May 1, 2019, at 9:36 on April 29, as the last torch tip of the torch system was successfully placed on the cylinder, the main structure of the torch system at Yueneng Jingyi Chemical Company was lifted into place, marking another significant breakthrough in the development of the company’s utility systems for its projects.
The flare system of the Lean Chemicals project consists of four parts, with a total height of 97 meters, and is lifted using large crawler cranes.
On November 27, at 13:45, the single-unit test of the turbine in the hydrogen production air separation unit of Shaanxi Jingyi Chemical Co., Ltd.’s project for the deep processing and multi-product utilization of coal tar was a complete success. This marked a major achievement in the testing of this air separation unit, creating favorable conditions for the subsequent production of high-quality oxygen and nitrogen products.