Recently, the 15 million tons/year coal separation, clean and efficient conversion demonstration project of olefins, aromatics and deep processing engineering basic design internal construction meeting of Shaanxi Coal Group Yulin Chemical Company was held in Donghua Science and Technology.

At the meeting, Zhu Dinghua, member of the Donghua Science and Technology Party Committee and deputy general manager, listened to reports on the work of the overall institute and the three device institutes, including project background, design input, organizational division of labor, work plans, and precautions. He asked: First, we must attach great importance to the promotion of this project, and continue to do sufficient and in-depth general plan planning and 30% model review. The second is to continuously develop new products and new technologies in the construction of this ultra-large modern coal chemical project, and promote the construction of smart factories. The third is to pay enough attention, be rigorous enough, and be bold enough, fully learn from the experience of similar excellent projects, not stick to the traditional management model, let go, keep an eye on design optimization, do a good job in top-level design, high standards and strict requirements, and hand over a safer , more reliable, more energy-efficient, more innovative, and more forward-looking satisfactory answers.

Participants discussed the next step work plan and the problems that need to be solved urgently. Various departments stated that the Shaanxi Coal Phase II Project is a key project of each design unit, and will attach great importance to it, so as to implement responsibilities, strengthen resources, continuously strengthen, equip, and optimize all kinds of talents, conduct more research, learn more, and communicate more , go all out to promote related basic design work.

In April 2023, Shaanxi Coal Group Yulin Chemical Co., Ltd.'s 15 million tons/year coal quality-based clean and efficient conversion demonstration project phase II olefins, aromatics and deep processing engineering basic design promotion meeting was held in Donghua Engineering Technology Co., Ltd. On January 4, 2023, Shaanxi Coal Group Yulin Chemical Co., Ltd.'s 15 million tons/year coal quality-based utilization project started project feeding and the 500,000 tons/year DMC project site commencement ceremony was successfully held.

Construction in two phases

In the first stage, the 1.8 million tons/year ethylene glycol project and the 15 million tons/year coal separation clean and efficient transformation demonstration project pyrolysis start-up project will be constructed. The ethylene glycol project started construction in September 2019, and completed the half-way handover of the device on April 28, 2022. On October 9, 2022, a single series of one-time start-up successfully produced polyester grade ethylene glycol products, and in November 2022 On the 25th, the whole series of processes were opened up, and the whole system is currently running at full capacity. The pyrolysis start-up project and the ethylene glycol project were constructed at the same time, and were successfully handed over on October 30, 2022. On December 26, 2022, the pulverized coal pyrolysis project was put into trial operation and pulverized coke and coal tar were produced. At present, the technological process has been completely opened up, and the device is running smoothly.

In the second phase, a 15 million tons/year coal quality-based, clean and efficient conversion demonstration project of olefins, aromatics and deep processing projects will be constructed. The second phase builds on the basis of the first phase to build olefins, aromatics and deep processing projects, and arranges a series of deep processing projects, involving 46 sets of chemical equipment, focusing on 4 major areas of high value-added materials, degradable plastics, battery electrolytes and special oils. The main products include acrylic acid, super absorbent resin (SAP), purified terephthalic acid (PTA), polyester (PET), polycarbonate (PC), bisphenol A, ethylene-octene copolymer (POE) and PBAT , PBS, EVA, PVA and more than 20 kinds.

It is worth noting that the second-stage olefins, aromatics and deep-processing project of the 15 million tons/year coal-based clean and efficient conversion demonstration project is the top priority of the entire coal-based utilization of new chemical materials demonstration project. Only the second-stage olefins, aromatics After the completion of the deep processing project and the complete completion of the deep processing project, it will be possible to further extend the creation of four major types of end products, including high value-added materials, battery electrolyte solvents, degradable plastics and special oil products, and form a demonstration effect of the advanced technology of coal quality classification and utilization in Shaanxi Coal. The magnification effect of oil and gas substitution and the strategic effect of technology migration have realized the high-end, diversified and low-carbon development of the energy and chemical industry base in northern Shaanxi. Editor/He Yuting