【Major industrial equipment in the chemical industry】It continues to grow in size; the 800,000-ton per year olefin production facility in Zhundong will use a counter-flow multi-nozzle coal-based semi-waste boiler gasifier with a diameter of 4,500 mm and a capacity of 3,000 tons
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The 800,000 tons per year coal-to-olefins project at Wucaiwan in Zhundong, Shaneng Xinjiang, uses coal as raw material and proceeds with methanol synthesis through pressurized coal gasification, shift reaction and heat recovery, as well as low-temperature methanol washing. Methanol is sent to downstream methanol-to-olefins units to produce polyolefins, while by-products such as sulfur, mixed C4 and C5 compounds, and propane are generated. The total investment for the project is 2,026,181 million yuan. Shandong Energy Group developed dry coal powder gasification technology at an early stage, but it has never been put into industrial use. The open-pit mine No. 4 at Wucailan has a high coal-water content, resulting in poor slurry-forming properties; the concentration of the coal slurry is only around 54%. In other words, the coal quality characteristics in Zhundong are not suitable for large-scale development of water-coal slurry gasification. On the other hand, the pulverized coal water-cooled wall gasification technology does not require good slurry-forming properties of the coal, thereby greatly increasing its adaptability to different types of coal. By utilizing the coal powder gasification technology owned by Shandong Energy Group, a large-scale coal powder gasification demonstration facility in Zhundong can be established, which enables the on-site conversion of coal from Zhundong and serves as a model for coal gasification in this area. According to the publicly released environmental impact assessment documents, the environmental protection demonstration task assigned to the coal-to-olefins project is the use of a new type of multi-nozzle opposed pulverized coal pressurized gasification system. The project will construct 4 counter-flow multi-nozzle pulverized coal semi-waste boiler gasifiers with a diameter of 4500 mm. The nominal capacity of a single furnace is 3,000 tons per day. Vaporization pressure: 4.5 MPa, operating temperature: ~1400°C; in normal operation, 3 units are in use while 1 is on standby. https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=3351263&extra=&mobile=2&shareuid=715815
Engineering demonstration of the multi-nozzle opposed coal pressurized gasification technology: The details of the demonstration are as follows: (1) Development of high-temperature resistant, long-life dry coal powder gasification process nozzles and ignition start-up nozzles. Study the nozzle performance and operational control strategies under the co-treatment of organic wastewater, in order to achieve efficient and sustainable treatment of such wastewater into useful resources. (2) Study the matching characteristics between multi-nozzle arrangement and the flow field in the gasification furnace. (3) Design optimization and operational characteristics study of a large-scale high-pressure coal powder feeding system. To address issues such as high pressure differences (1.0 MPa) in coal powder transportation and high gas consumption in high-pressure feeding systems, a super-concentrated phase stable and controllable transportation technology with low pressure differences (0.6–0.7 MPa) has been developed. The design and scaling methods for large coal powder lockhoppers and dense-phase pneumatic conveying systems were developed, resulting in a high-concentration, stable, and controllable high-pressure coal powder feeding technology suitable for large-scale multi-nozzle opposed gasifiers. (4) Research on the optimization of process equipment for syngas quenching, washing, and dust removal. (5) Research on coal quality modification for low-quality coals based on their physicochemical properties and slag melting flow characteristics
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Will this furnace be made by Dongfang Boiler?