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**The gasifier of the Yulin energy and chemical project, with a coal feeding rate of 3,000 tons per day, was successfully ignited for the first time during its drying process

2020-08-25View Original

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**The gasification furnace at the Yulin project of Energy Chemical Group, with a coal feeding rate of 3,000 tons per day, was successfully ignited during its first heating trial. Author/Source: Huahua Network – Coal Chemicals. Date: August 25, 2020. Clicks: 10. At 22:48 on August 18, the gasification furnace at the Yulin project was successfully ignited for the first time during its heating trial; this marked the official start of the heating process for the world’s largest single-nozzle Texaco water-coal slurry gasification furnace. This event represented a significant advancement in the commissioning phase of the Yulin project. The Yulin Circular Economy Coal Comprehensive Utilization Project (Phase I) of the chemical company includes a 1.86 million tons per year coal-to-methanol plant and a 400,000 tons per year syngas-to-ethylene glycol plant. At present, the gasifiers in domestic coal-to-methanol projects with an annual production capacity of 1.8 million tons are generally configured on a 5-in-service-2-backup basis, with a capacity of 1,500 tons per day. These systems suffer from frequent shutdowns, heavy maintenance tasks, and high maintenance costs. The Yulin project marked the first design, manufacture, and application of a gasification furnace with a coal feeding capacity of 3,000 tons per shift in a gasification unit. It operates on a 3-in-service-2-on-backup basis, which increases the production capacity per furnace and reduces the number of furnaces in operation, thereby lowering the frequency of maintenance tasks. Additionally, the installation of facilities for recycling fine slag improves the carbon conversion rate; estimates indicate that this approach can save approximately 9.8 million yuan in raw coal costs each year. The main purpose of heating the gasification furnace is to dry the refractory materials, remove the adsorbed water and crystalline water from the refractory lining, and ensure that the refractory bricks as well as the entire gasification furnace equipment meet the temperature requirements for normal production processes. The first-phase project of the Shenhua Yulin Circular Economy Coal Comprehensive Utilization Project is a preliminary phase of this project (referred to as the CTc Project). It also serves as a facility for producing methanol raw materials to support the already completed Shenhua Shaanxi Methanol Downstream Processing Project (SSMTO). The construction includes facilities for producing 1.8 million tons per year of methanol along with 400,000 tons per year of ethylene glycol. This involves processes such as air separation, gasification, shift reaction, acidic gas removal, methanol synthesis, sulfur recovery, and ethylene glycol production, along with the necessary utility systems and auxiliary facilities. Once completed, it will enable integrated production and management together with the SSMTO project. The Shenhua Yulin Circular Economy Coal Comprehensive Utilization Project (CTc Project) was officially approved by the **National Development and Reform Commission on March 16, 2015 (Document No. FGJN [2015] No. 508). The total investment for this project amounts to 120 billion yuan. Among them, the total investment in the current phase of the Shenhua Yulin Circular Economy Coal Comprehensive Utilization Project amounts to 382.2 billion yuan. The third-phase project of Shenhua Yulin Circular Economy Coal Comprehensive Utilization Project has a total investment of 20 billion yuan, and the preliminary stage was initiated in 2020. It is reported that the first phase of Shenhua Yulin Circular Economy Coal Comprehensive Utilization Project is scheduled to be fully completed by 2020 (with delivery during the construction period); testing operations will begin in the second half of that year, and qualified products will be produced by the end of 2020. Once the project is put into operation, it will completely resolve the current issues of complete reliance on market purchases for methanol and the uncontrollable costs. The project utilizes General Electric’s (GE) high-efficiency water-cooled coal slurry gasification technology, featuring 5 gasifiers in a single series with a coal feeding capacity of 3,100 tons per day on a dry basis; these gasifiers operate under a pressure of 6.5 MPa. The facility is capable of producing 1.8 million tons of methanol per year for use in olefin production, as well as 400,000 tons of ethylene glycol and other high-value downstream products. Methanol synthesis uses the David technology, while ethylene glycol employs the Shanghai Pujing technology.

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