It is understood that ethylene glycol is an important chemical raw material and strategic material for manufacturing polyester. In recent years, the market demand for polyester industry has been huge. It can further produce polyester, beverage bottles, cosmetics, etc., and can also be used as solvents and antifreeze. and raw materials for synthetic polyester.
According to reports, Qianxi Chemical has an annual production capacity of 300,000 tons of ethylene glycol and is currently the largest coal-to-ethylene glycol production base in Southwest China. The market covers South China, East China, Sichuan and other places, accounting for an important share of the ethylene glycol consumption market dominated by the polyester industry. In 2020, the total industrial output value reached 1.151 billion yuan.
Last year, Guizhou Yuneng Investment Co., Ltd., a subsidiary of Qianxi Chemical, ranked among the top 20 of the “Top 100 Guizhou Manufacturing Enterprises in 2020” with a revenue of 3,928.68 million yuan, ranking No. No. 19, Qianxi Chemical Industry can be said to have contributed a lot. “Coal-to-ethylene glycol” uses coal instead of petroleum ethylene to produce ethylene glycol, which has the characteristics of “reduction, reuse and resource utilization”. Qianxi City and surrounding areas are rich in coal resources and have the advantage of on-site deep processing of coal. They are the main raw material supplier for Qianxi Chemical Industry.
At the same time, Qianxi Chemical’s 300,000-ton coal-to-ethylene glycol project is a landmark project for Bijie City to accelerate the new coal chemical industry. Pan Bin, head of the production technology department of Qianxi Chemical Industry, said that the base adopts the most advanced coal-to-ethylene glycol production process, which is highly automated and safe. After coal is gasified under pressure, the carbon conversion rate can reach more than 99%. It is a typical representative of clean utilization of coal.
To make the coal chemical industry bigger and stronger, Qianxi City will accelerate the promotion of new industrialization, give full play to the chemical resource endowment of Qianxi, and lengthen the industrial chain through strengthening the chain and extending the chain. Increase the added value of the industry in an all-round way. Pu Jian, director of the Mass Department of the Qianxi Chemical Workers’ Party, said: “At present, the company has made an overall layout of the upstream and downstream industrial chains and by-product production lines. In addition to the coal-to-ethylene glycol project, there are 4 new planned projects.
Among them, the dimethyl carbonate (DMC) project with an annual output of 10,000 tons has been put into operation, and plans to expand the production capacity to 50,000 tons; the investment promotion project with an annual output of 150,000 tons of hydrogen peroxide is about to be launched; The 300,000-ton methanol project is progressing in an orderly manner; the ethylene glycol distillation and dealcoholization tower energy-saving project has entered the trial stage. After being put into operation, it will be upgraded from industrial-grade ethylene glycol to polyester-grade ethylene glycol, further improving market competitiveness and Economic benefits.” It is worth mentioning that after the 300,000-ton methanol project is put into operation, it will not only be used as a raw material for the production of dimethyl carbonate, but also provide supporting equipment for the PGA project of Guizhou Zhijin Sinopec Great Wall Energy and Chemical Co., Ltd., while solving the problem of Bijie The problem of methanol new energy vehicle fuel supply in the city and even the province.
In view of this, Qianxi Chemical has been actively implementing energy-saving and green environmental protection projects around the construction of green and environmentally friendly factories since it was put into operation in June 2018. “For production wastewater, the base has built a 200 cubic meter sewage treatment system; in terms of waste gas, it has set up 3 flue gas treatment devices, and invested 45 million to introduce a desulfurization system to treat acidic gases to ensure that water and gas emissions meet standards; in terms of solid waste , gasification ash and boiler ash are transported to brick factories and cement plants for treatment, and plans to introduce third parties for quality improvement and treatment. In terms of noise, 19 million yuan was invested in the air compressor factory building, air separation air filter installation area, and power plant factory building. and other high noise sources for sound insulation and noise reduction.” Song Guangjun, director of the Safety and Environmental Protection Department of Qianxi Chemical Industry, introduced. What is still fresh in my memory is that before the sound insulation equipment was installed, everyone would even have to “shout at the top of their lungs” when meeting face to face in the factory. But now the entire factory is quiet, but the products are flowing out of the assembly line in an orderly manner.
It is understood that in order to reduce carbon emissions, the company supplied all the carbon dioxide generated during the production process to a 10-year-old company in the park as early as two years ago. A company that produces 10,000 tons of food-grade carbon dioxide, which is used to make carbonated drinks, achieving zero carbon dioxide emissions from the company. In the next step, Qianxi Chemical will focus on the coal chemical project and use the production conditions of hydrogen and dimethyl carbonate to attract hydrogen raw material battery, lithium battery and other manufacturing companies to settle in the park to achieve industrial cluster development. At the same time, it will try to develop nitrogen to serve medical care. industry.
Project Overview
Qianxi Coal The chemical industry uses 3 space furnaces to produce 300,000 tons of ethylene glycol, and uses high-chemical complex CTEG synthesis gas to produce ethylene glycol technology. It was put into production in May 2018.
Since the unit was put into operation, Qianxi Chemical Gasification Plant has controlled the source of materials, scientifically blended coal, and improved the grindability index of raw coal in terms of production management and equipment maintenance; strict control The temperature and flow rate of the burner cooling water can reduce the thermal stress of the burner; ensure the stable load of the gasifier and reduce pressure fluctuations; optimize and upgrade the limestone transportation system to reduce the ash melting point and control the gasification temperature as low as possibleLow range; reasonably control the pressure difference to ensure that the burner head is as far away from the high temperature area as possible; appropriately increase the protective gas flow rate and other measures to scientifically manage the burner.
The Qianxi 300,000 tons/year ethylene glycol project successfully completed a commissioning trial on May 31, 2018. The system has been running smoothly and all performance indicators of the ethylene glycol product have been met. The design requirements laid a solid foundation for the completion and settlement of the project. Qianxi Coal Chemical Industry’s 300,000-ton coal-to-ethylene glycol project uses coal as raw material, is gasified in a space furnace, and produces ethylene glycol using Japan’s Ube process. It was put into operation in May 2018, with a total investment of 6.3 billion yuan. It is currently the largest single set of coal-to-ethylene glycol equipment in the country and the largest coal-to-ethylene glycol base in Southwest China.
On March 14, 2019, the daily output of Guizhou Yuneng Qianxi Chemical’s 300,000 tons/year coal-to-ethylene glycol unit reached 1,095.09 tons, breaking through the design value for the first time and achieving full load. Production. </p
