Traditional coal-fired, coal gasification boilers and their power generation technologies are all in the form of “a fire-burning coal” with low total energy efficiency and coal-to-electricity conversion rate, serious pollution and large water consumption. Power Engineering, Xi'an Jiaotong University, Multiphase Flow State Key Laboratory of Professor Guo Liejin team led by "973" program at the National Outstanding Youth Science Foundation, National Natural Science Foundation of major projects and innovative community projects, the national "863" plan and other projects Under continuous support, after 20 years of scientific and technological research, we have developed a series of technologies for “coal supercritical water gasification and hydrogen production multi-generation”, commonly known as “supercritical water steaming”.

This technology proposes a new gasification principle for the complete endothermic-reduction hydrogen production of coal in supercritical water. It uses the temperature and pressure to reach or exceed the critical point of water (374.3 °C, 22.1 MPa), that is, the special water of supercritical state. Physicochemical properties, using supercritical water as a homogeneous, high-speed reaction medium for coal gasification, and gasification of carbon, hydrogen and oxygen in coal into hydrogen and carbon dioxide by means of a supercritical fluidized reaction bed invented by the team. At the same time, thermochemical decomposition of some supercritical water to produce hydrogen, the coal chemical energy is directly and efficiently converted into hydrogen energy.

The “supercritical water steaming” technology has advanced technologies such as more efficient, clean and pollution-free, no need for tail flue gas desulfurization and denitrification and CO2 enrichment and capture, low water consumption or even no water consumption, and can be combined with organic waste pollutant treatment and operation. Low cost, high return on investment, and complete independent intellectual property rights are a revolutionary technology that is expected to eradicate the source of smog generated by coal utilization. Compared with traditional coal-fired power generation and coal gasification hydrogen production technology, the new technology has significantly improved power generation and hydrogen production efficiency. The investment and operating costs after large-scale reduction are significantly reduced, and coal-to-electricity and energy-carrying industrial products can be realized. And "three conversions" of high value-added products such as chemical products.

In order to deepen the cooperation between industry, universities and research institutes and promote the transfer of scientific and technological achievements in schools, China National Nuclear Investment Fund Management (Beijing) Co., Ltd., Hong Kong Rich Investment Co., Ltd. and Xi'an Beiqi Energy Technology Development Co., Ltd. jointly initiated the establishment of a technology investment in mixed ownership. The company promoted the industrialization of the technology, and Xi'an Jiaotong University transferred the intellectual property rights and related technologies of the technological achievements to the industrialized investment company at a price of 150 million yuan. The company will initially raise 1 billion yuan for engineering demonstration of technology industrialization. It is understood that the project industrialization company plans to complete the construction and operation of the first industrialization demonstration project of the technology within three years, and accelerate the promotion and application of the technology in the efficient and clean use of coal and environmental protection. At present, it has been determined that the 50MW power generation and cogeneration unit and the coal-fired industrial heating steam boiler replacement products will be used as the entry point for the project demonstration.

According to reports, the industrialization of this technology has created a new model of transformative and original industrialization transformation of various social forces and resources through effective integration. In particular, the integration and listing of Hong Kong capital will promote the introduction of international capital and accelerate the transformation and upgrading of the original extensive energy industry in Shaanxi Province to high-efficiency and clean high-value-added industries, and accelerate the formation of China's unique coal clean and efficient water-saving. Transforming and utilizing the technology industry provides a technical guarantee for China to embark on a new path that relies entirely on its own rich coal, lack of oil and gas, and supports new construction and development. The industrialization of the project will also implement the spirit of the Central Economic Work Conference, promote the “deepening of the structural reforms on the supply side and the key areas of tackling the key areas”, and implement the strategic layout of the central “with mixed ownership reform as a breakthrough”, taking the lead in electricity, oil , The implementation of mixed ownership reform in monopoly areas such as natural gas has great practical significance.

As a coal producing and consuming country, China's coal-based energy structure will not change in the short term, and the traditional coal utilization method will inevitably increase the difficulty of environmental problems such as smog at the expense of the environment. In this context, the industrialization of “supercritical water steaming” technology is based on China's national conditions, giving full play to the advantages of rich coal resources, seizing the opportunities for energy transformation, ensuring energy strategy security, accelerating pollution control, reducing environmental impact, etc. And far-reaching significance, it is expected to fundamentally solve the air pollution caused by the utilization of coal burning in China for a long time and the smog problem which is greatly aggravated during the heating period in winter.

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