Sinochem Southwest Chemical Research and Design Institute Co., Ltd. received orders for six sets of large-scale high-pressure pressure swing adsorption units

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Sinochem Southwest Chemical Research and Design Institute Co., Ltd. received orders for six large-scale high-pressure pressure swing adsorption units. Author/Source: Huahua Network Coal Chemicals; Date: December 11, 2022; Clicks: 19. On December 6, Sinochem Southwest Chemical Research and Design Institute Co., Ltd. received orders for six such units, and will provide its proprietary technology, comprehensive engineering design, key equipment, as well as round-the-clock technical support for the PSA units used in the hydrogen recovery system of the methanol synthesis unit within Inner Mongolia Baofeng Coal-based New Materials Co., Ltd.’s innovative demonstration project aimed at reducing carbon emissions through the integration of green hydrogen and coal chemical processes. The innovative demonstration project on carbon emission reduction through the integration of green hydrogen and coal chemical industry by Inner Mongolia Baofeng Coal-based New Materials Co., Ltd. is the world’s first project to use green hydrogen on a large scale to replace fossil fuels in the production of olefins. This project employs a synergistic production process that combines green hydrogen with modern coal chemical technologies. The total capacity for olefins production is 3 million tons per year, of which 400,000 tons are supplied as green hydrogen and green oxygen through an integrated demonstration project for producing hydrogen from wind and solar energy. In other words, green hydrogen is used to replace the raw coal used in the methanol synthesis process, thereby reducing carbon dioxide emissions from the industrial process. Meanwhile, the oxygen produced as a by-product is used as an alternative fuel to coal in the gasification process, helping to reduce the energy consumption of the air separation units. For the methanol synthesis unit supporting this project, there are a total of six PSA units in the hydrogen recovery system for the off-gases from methanol synthesis. These units employ a two-stage PSA process to recover hydrogen from the off-gases generated during methanol synthesis and to produce high-purity hydrogen. There are 3 series in total, with 2 PSA units in each series; the production capacity of each series exceeds 50,000 standard cubic meters per hour. The operating pressure of the PSA unit is as high as 5.8 MPaG. Most of the hydrogen produced in the first stage of PSA is recycled to the methanol synthesis unit to increase methanol production, while some of the hydrogen goes to the second stage of the PSA unit for the production of high-purity hydrogen. It is reported that all six PSA units utilize the high-pressure PSA technology developed by the Southwest Research Institute, allowing for the direct production of high-pressure, high-purity hydrogen without the need for pressure reduction of the methanol synthesis off-gases. High-pressure PSA technology achieves a higher hydrogen recovery rate; it not only avoids pressure losses in the feed gas and reduces energy consumption, but also saves on the total investment required for the project. Innovative Demonstration Project for Carbon Emission Reduction through the Coupling of Green Hydrogen and Coal Chemical Industry by Inner Mongolia Baofeng Coal-Based New Materials Co., Ltd.
Nature of construction: New construction
Location: Tuk Industrial Project Area, Sulihe Economic Development Zone, Wushen Banner, Ordos City, Inner Mongolia Autonomous Region; located in the reserved area in the northern part of the park, between Weiqi Road and Weijiu Road, as well as Jing San Road and Jingba Road
Constructor: Inner Mongolia Baofeng Coal-Based New Materials Co., Ltd.
Land area: 594.43 hectares
Total workforce: 3,500 people
Total project investment: The approved total investment amounts to 478,113.7 million yuan, of which the construction cost (including value-added tax) is 443,110.9 million yuan, interest during the construction period is 31,529.6 million yuan, and working capital required for startup is 34,732 million yuan (the above figures are based on normal operating conditions).
Operating hours per year: 8,000 hours
Scale of construction: The project will mainly include 3 × 2.2 million tons/year methanol production units (including 7 × 110,000 Nm3/h oxygen generation units, 3 × 562,000 Nm3/h gasification, shift conversion, and heat recovery units, as well as low-temperature methanol washing units); 3 × 1 million tons/year methanol-to-olefins production units (including olefin separation units); 3 × 500,000 tons/year polypropylene production units; 3 × 550,000 tons/year polyethylene production units; a 200,000 tons/year unit for producing 1-butene from C4 compounds; and a 200,000 tons/year steam cracking unit. In addition to producing polypropylene and polyethylene, it also produces by-products such as sulfur, heavy naphtha, C5+, ethylene tar, and MTBE. Product process plan: http://img.yf116.cn/image/img/20221211/1520375523710.jpg. The project is based on a coal-to-olefins production capacity of 2.6 million tons per year; it relies on a separate demonstration project for integrated wind and solar hydrogen production to supply green hydrogen and green oxygen over time. The hydrogen supplied is directly used in the methanol synthesis unit, thereby reducing the load on the conversion and heat recovery systems – conversion involves the reaction of CO with H2O to produce H2 and CO2, in order to achieve the required H2/CO ratio for subsequent methanol synthesis reactions – and this helps to reduce CO2 emissions from the process system ； The additional oxygen is used as oxygen for gasification, reducing the load on the air separation unit and thereby decreasing the amount of coal fuel required. With the coal consumption remaining constant, the production of domestically produced methanol is increased by adding hydrogen and oxygen year by year; by the fifth year of hydrogen supplementation, the output of domestically produced methanol is sufficient to meet the demand for methanol in olefin production, while simultaneously achieving a year-by-year reduction in CO2 emissions. The main process of this project involves pressurized gasification of raw coal using water-coal slurry (in a quenching process), followed by shift reaction and purification to produce purified gas. This purified gas is mixed with hydrogen generated by the integrated demonstration project for hydrogen production from wind and solar energy, to serve as the feed gas for methanol synthesis. MTO-grade methanol is produced through low-pressure methanol synthesis technology, and then polymeric-grade ethylene and propylene are manufactured using methanol-to-olefins technology. Polyethylene and polypropylene products are obtained by polymerizing polymeric-grade ethylene and propylene respectively. To make rational use of various by-products, the ethane, propane, and saturated light hydrocarbons produced as by-products of olefin separation, as well as those generated from the conversion of C4 compounds into 1-butene, are subjected to steam cracking to increase the production of ethylene and propylene ； 1-butene is obtained by separating the mixed C4 produced as a by-product of the olefin separation process, to be used as a raw material for polyethylene production. The main products of this project are polyethylene and polypropylene, while the by-products include sulfur, MTBE, ethylene tar, heavy naphtha, and C5, among others. The project includes a total of 12 sets of production units, such as an air separation unit, a gasification unit, a shift and heat recovery unit, a low-temperature methanol washing unit, a sulfur recovery unit, a methanol synthesis unit, a DMTO unit, an olefin separation unit, an SCU unit, a C4 unit for producing 1-butene, a polyethylene unit, and a polypropylene unit ； Utilities include power stations, water supply and drainage systems, sewage treatment plants, recycled water facilities, main substations, and power distribution systems ； Auxiliary production facilities include the central control room, central laboratory, heat exchange station, flare system, hazardous chemicals storage area, hazardous waste temporary storage area, plant fire protection system, and comprehensive office building ； The storage and transportation system includes the coal transportation and storage system as well as tank farms, etc. The disposal of general solid waste is carried out through the General Industrial Solid Waste Disposal and Resource Recovery Storage Site project in the Sulihe Economic Development Zone (referred to as the industrial zone waste dump), while hazardous solid waste is sent to qualified entities for disposal.