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A country's coal-based energy structure is unlikely to change in the coming decades, but the traditional way of the use of coal waste resources, pollute the environment, unsustainable development. IGCC coal gasification based polygeneration in our current energy and environmental issues facing the backdrop made of energy, resources, environment and sustainable development in the integration of clean and efficient energy system that can meet China's economic and social development of electricity , liquid fuels and chemicals and other needs. The idea is to break the boundaries of the industry, coal gasification core, combined with the energy, chemical, metallurgical and other original independent production process, through the production process of the organic coupling and optimization, so that each product of the process, equipment is simplified, investment and operating costs can be reduced, so as to achieve optimal efficiency and pollution minimal overall effect. Paper relies on the Shanghai Science and Technology Commission research programs \. Mainly done the following several aspects: First, in the analysis of coal-based electricity, methanol polygeneration system construction principle, the system features, based on the establishment of a Texaco gasifier, two-stage air gasifier, syngas dust removal and desulfurization systems, gas turbine combined cycle system and the mathematical model of methanol system and verified, the results show that the model established in this paper can be used in coal-based electricity, methanol polygeneration system simulation. Secondly, based on coal-based chemical power polygeneration system integration and integration of the principles of theoretical ideas, that considering the \Parallel multi-generation systems, coal-based electricity, methanol series polygeneration system. According to the system model results, comparative analysis of the overall performance of the three systems and the advantages and disadvantages of each system, and concluded: holistically, coal-based electricity, methanol parallel polygeneration system is superior to coal-based electricity, methanol series polygeneration system. Finally, in the coal-based electricity, methanol parallel polygeneration system without water gas shift reaction and methanol optimization program, through the membrane separating hydrogen, will go to the gas turbine combined cycle syngas H: separated for Adjust methanol synthesis gas hydrocarbon ratio. Details of the hydrogen membrane separation technology, the establishment of a new type of membrane separation with coal-based electricity, methanol parallel polygeneration system model. Using this model, we calculate a new type of coal-based electricity, methanol parallel polygeneration system performance, and with a coal-based power conversion process, methanol parallel polygeneration systems are compared. Of new coal-based electricity, methanol parallel polygeneration system, with the increasing concentration of CWS, H2 content decreased very little, CO levels have a clear upward trend, C02 and H20 have a downward trend, increased production of methanol, power generation in the fall. Oxygen-coal ratio increases, H2 and CO decreased relative, C02 and H20 relative content increased, methanol production and power generation system volume on the decline. When the methanol synthesis gas changes from 0.2 to 0.3, methanol production soared, and the system generating capacity is declining.
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