Desulfuration process and device thereof

Abstract

The invention discloses a desulfuration process. The process comprises the following steps of: combusting a desulfuration agent and coal together to generate smoke and cinder, treating the smoke by using water, flushing the cinder, treating the formed waste water, and then treating the smoke produced by the combustion of the desulfuration agent and the coal and flushing the cinder produced by the combustion of the desulfuration agent and the coal by using the waste water so as to form a circulating system. The process saves a gypsum crystallization system, a drying system and a limestone slurry-making system in a wet limestone / lime-gypsum desulfuration device so as to greatly simplify the structure and reduce the cost; and the process recycles the cinder flushing water to remove sulfur-containing gas from the smoke and uses the desulfuration agent taking sludge as a main raw material, so the method reduces secondary pollution, can save the coal by 6 to 12 percent, has the desulfuration efficiency of 95 percent, and has remarkable environmental benefit and economic benefit.

Description

technical field [0001] The invention relates to a coal-fired electric power and industrial coal-fired technology, in particular to a flue gas desulfurization process and a device thereof. Background technique [0002] According to the environmental quality announcement, my country's total sulfur dioxide emissions rank first in the world, exceeding the capacity of the atmospheric environment by 80%. By the end of 2005, more than 50 desulfurization companies in China have successively introduced flue gas desulfurization technology and devices in other countries, but these technologies and devices were applied in developed countries in the 1930s, and most of them are wet limestone / lime-gypsum desulfurization methods. The wet limestone / lime-gypsum desulfurization method The advanced desulfurization process includes crushing and grinding limestone to prepare limestone slurry by stirring, sending the limestone slurry to the spray tower to spray the flue gas in the flue, the gypsum p...

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Problems solved by technology

[0002] According to the environmental quality announcement, my country's total sulfur dioxide emissions rank first in the world, exceeding the capacity of the atmospheric environment by 80%. By the end of 2005, more than 50 desulfurization companies in China have successively introduced flue gas desulfurization technology and devices in other countries, but these technologies and devices were applied in developed countries in the 1930s, and most of them are wet limestone / lime-gypsum desulfurization methods. The wet limestone / lime-gypsum desulfurization method The advanced desulfurization process includes crushing and grinding limestone to prepare limestone slurry by stirring, sending the limestone slurry to the spray tower to spray the flue gas in the flue, the gypsum produced is discharged after crystallization and drying system treatment, and the waste water produced The desulfurization method is not only complicated in process and high in system operating costs, but also complex in device structure and high in investment costs, and most of the formed waste water gypsum slurry has no recycling value due to quality and other reasons, causing serious pollution to the environment

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