Method and system for producing hydrogen oil by converting ultrahigh-temperature fly ash

Abstract

The invention discloses a method and a system for producing hydrogen oil by converting ultra-high-temperature fly ash, and the system for producing hydrogen oil by converting ultra-high-temperature fly ash is used for mixing fly ash and urban garbage according to a certain proportion, granulating and molding, and then carrying out ultra-high-temperature gasification to generate molten slag and mixed gas. The mixed gas is subjected to reforming and water-gas shift under the action of a high-selectivity catalyst to generate hydrogen and carbon dioxide, the hydrogen is subjected to a gas purification section to prepare purified hydrogen, and the purified hydrogen and a liquid organic hydrogen storage carrier are subjected to a hydrogenation reaction to obtain hydrogen oil which can be stored at normal temperature and normal pressure. According to the comprehensive utilization system for the fly ash, various pollution sources generated in the fly ash treatment process can be fundamentally eradicated, the requirements of all environmental protection standards in the world at present are met, the fly ash can be converted into hydrogen energy and various useful substances, and good environmental protection and economic values are achieved.

Description

Technical field [0001] The present invention belongs to the field of hydrogen energy technology, particularly relates to an ultra-high temperature fly ash conversion method and system for hydrogen oil. Background [0002] Fly ash is a tiny ash particle, also known as fly ash or soot, that is emitted during the combustion of fuel (mainly coal). The main physical phases of fly ash are vitreous, accounting for 50% to 80%; the crystal minerals contained are mullite, α-quartz, calcite, calcium feldspar, calcium silicate, hematite and magnetite, as well as a small amount of unburned carbon. Fly ash mainly comes from the incineration of domestic waste and coal-fired fly ash, according to the "2018 National Annual Report on the Prevention and Control of Environmental Pollution by Solid Waste in Large and Medium-sized Cities" issued by the Ministry of Ecology and Environment, its annual output is about 490 million tons. According to other statistics, due to the high margin, the total accu...

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Problems solved by technology

Taking Germany as an example, the liquid organic hydrogen storage technology developed can realize the hydrogen absorption and desorption cycle under relatively mild conditions, but the released hydrogen contains by-product gases that are poisonous to fuel cells, and there are also important problems such as low capacity and inconvenient use. Defects: Japan is currently developing hydrogen storage technology based on traditional organic materials such as toluene, but the dehydrogenation temperature is too high (greater than 300°C), and there is also the problem of poisoning fuel cells by by-products

Therefore, the large-scale application of these two normal temperature and pressure liquid organic hydrogen storage technologies is restricted.

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