Waste comprehensive treatment process and equipment for solid fuel generating station

Abstract

The invention discloses a waste comprehensive treatment process and equipment for a solid fuel generating station. In the process, thermal refined seawater containing metal ions like Na<+>, K<+>, Ca<2+> and Mg<2+> is electrolyzed and generates alkaline matters and acid gas, the alkaline matters are used to absorb carbon dioxide in emitted fuel gas of the generating station, and the carbon dioxide is treated in a harmless manner and then emitted to the sea to be stored, the acid gas is used to synthesize hydrochloric acid and conducts a dissolution replacement reaction with coal ash, biomass ash or cheap silicate salt mine emitted by the generating station, the separated dissolved solution containing the ions of Na<+>, K<+>, Ca<2+>, Mg<2+> and Cl <->is recycled and returned to the thermal refined seawater to continue to be electrolyzed, and the separated SiO2 is used as an industrial raw material, so that virtuous circle of comprehensive treatment of the waste of the generating station is formed. The equipment mainly comprises an electrolysis device, a carbon dioxide absorption tower, a hydrogen chloride synthesis tower, a silicate reactor, a cyclone separator and a vacuum belt conveyer, so that the waste of the generating station can be comprehensively utilized to the greatest extent.

Description

technical field [0001] The invention relates to the environmental protection technology of a power station, in particular to a solid fuel power station waste comprehensive treatment process and equipment thereof. Background technique [0002] At present, most of the raw materials used in solid fuel power stations are coal, and a small part of them use recyclable biomass. my country is the largest coal-fired power generation country in the world. Coal-fired power generation units account for about 70% of all power generation units, and biomass power generation is relatively small. The waste fly ash and greenhouse gas carbon dioxide emitted by my country's coal-fired power generation ranks first in the world, and the biomass ash produced by burning biomass is also increasing year by year. According to statistics, the total emission of fly ash in my country has exceeded 375 million tons, and the annual emission of carbon dioxide has exceeded 6.1 billion tons, and the emissions...

AI Technical Summary

Problems solved by technology

Among the three storage methods, the first geological storage technology has been applied to a certain extent, but the change of geological conditions will lead to the increase of unsafe factors, and with the extension of time, its unsafety will become more and more prominent

The second deep-sea storage technology is easy to damage the deep-sea ecological environment, and it is rarely used at present

The third carbonate storage technology, also known as mineral storage technology, has the best fixation effect on carbon dioxide in theory, and the carbon dioxide converted into salt will not be released into the atmosphere again, so it has received widespread attention, but it still remains In the experimental stage of fixing carbon dioxide, it is still far from practical application

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