Device achieving dedusting, desulfuration and denitration by means of acid and alkali potential water

Abstract

Provided is a device achieving dedusting, desulfuration and denitration by means of acid and alkali potential water. The device comprises an electrolysis reactor, a boiler, a chimney, a flue gas induced draft fan, a flue gas desulfurization spray device, a flue gas denitration spray device, a desulfurization circulating pool, a denitration circulating pool, a desulfurization circulating pump and a denitration circulating pump. The bottom of the flue gas desulfurization spray device and the bottom of the flue gas denitration spray device are installed in the desulfurization circulating pool and the denitration circulating pool respectively. Alkali reduction potential water and acid oxidation potential water which are generated by the electrolysis reactor are connected with spray heads in the flue gas desulfurization spray device and the flue gas denitration spray device and the circulating pumps through water delivery pipelines to achieve desulfuration and denitration of the potential water respectively. The device has the advantages that the effects of dedusting, desulfuration and denitration of flue gas are achieved simultaneously, the structure is simple, the operating cost is low, hazardous pollutants are removed thoroughly, and secondary pollution is not caused; the device can be applied to dedusting, desulfuration and denitration of flue gas which is produced in industries such as coal-fired power plants, chemical engineering, metallurgy and building materials and contains sulfur dioxide and nitric oxides.

Description

technical field [0001] The invention relates to air pollution prevention and control technology, in particular to a dust removal, desulfurization and denitrification device using acid and alkali potential water. Background technique [0002] In recent years, with the rapid development of my country's economy and the significant improvement of the level of industrialization, air pollution has become increasingly serious, and pollution such as sulfur dioxide, nitrogen oxides, and fine particulate matter (PM2.5) has become a prominent environmental pollution problem in my country. High-level departments have successively introduced strict air pollution prevention and control policies. Nowadays, integrated desulfurization and denitrification technologies are widely used, mainly the combination of wet flue gas desulfurization and selective catalytic reduction or selective non-catalytic reduction technology denitrification. Wet flue gas desulfurization is commonly used in the calc...

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Problems solved by technology

Wet flue gas desulfurization is commonly used in the calcium method using lime or limestone to generate calcium sulfite hemihydrate or gypsum, and the desulfurization efficiency is greater than 90%. The disadvantage is that the project is huge, and the initial investment and operating costs are high. Not high, causing difficulties in reuse or disposal, and easy to form secondary pollution

Selective catalytic reduction denitrification and selective non-catalytic reduction denitrification technologies are mature and reliable. The disadvantages are that the investment in process equipment is large, the flue gas needs to be preheated to ensure the reduction denitrification temperature, the denitrification efficiency is low, the catalyst is expensive and the service life is short, and there are ammonia leakage, Equipment is prone to corrosion and other problems

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