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Integrated equipment for desulfurization, denitrification and dedusting by coal ash and oxidant applying method under acidic condition

A technology for desulfurization, denitrification, and acidic conditions, which is applied in chemical instruments and methods, separation methods, and the use of liquid separation agents, etc. It can solve the problems of high investment in dust removal equipment, large floor space, and low desulfurization efficiency.

Inactive Publication Date: 2009-09-16
李成岳
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, in industrial enterprises, especially in mines, factory workshops and other places, a large amount of dust-containing gas is produced. All parties are trying to solve the problem of dust removal, desulfurization and denitrification during smoke exhaust. The existing dust removal equipment is expensive and occupies a large area. Low desulfurization efficiency

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  • Integrated equipment for desulfurization, denitrification and dedusting by coal ash and oxidant applying method under acidic condition
  • Integrated equipment for desulfurization, denitrification and dedusting by coal ash and oxidant applying method under acidic condition
  • Integrated equipment for desulfurization, denitrification and dedusting by coal ash and oxidant applying method under acidic condition

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Embodiment Construction

[0040] The dust-laden gas enters through the air inlet, the airflow impacts the water surface, and the larger dust particles fall into the water, and the gas containing smaller dust particles passes through the 2-S channel at a speed of 18-25 m / s, arousing a large number of water splashes, making the air flow Fully contact with water, the fine dust particles are mixed into the water to purify the dust-containing gas; at the same time of dust removal, the sulfur-containing gas is in contact with the atomized water to produce acidic water, which reacts with the alkaline substances in the coal ash and the added iron elements , to complete the desulfurization process; at the same time, due to the addition of elemental iron, it is ensured that the system contains a large amount of abundant Fe(II), Fe(II) reacts with nitrogen oxides, and reduces nitrogen oxides to nitrogen while itself being oxidized , so as to achieve the denitrification effect, and the first-level dust removal, des...

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Abstract

The invention relates to integrated equipment for desulfurization, denitrification and dedusting by coal ash and oxidant applying method under acidic condition. In first-stage dedusting and desulfurization, flue gas and water react as follow: SO2+H2O=H2SO3=H<+>HSO3<->=2H<+>+SO3<-2> (1); (Na2O.K2O)+H2SO3=(Na.K)2SO3+H2O (2); (MgO.Ca2O)+H2SO3=(Mg.Ca)SO3+H2O (3); 4H<+>+2SO3<-2>+Fe2O3=FeSO4+FeSO3+2H2O (4); 4Fe<+2>+4H<+>+O2=4F<+3>+2H2O (5); NO+FeSO3=Fe(NO)SO3 (6); and 2Fe(NO)SO3+O2+H2SO4=Fe2(SO4)3+N2+H2O (7). In second-stage dedusting and desulfurization, a spray method is adopted to further increase desulfurization and dedusting efficiency and remove moisture in the flue gas. The present invention adopts novel iron ion desulfurization and denitrification process, utilizes iron ion to carry out desulfurization and denitrification, in actual operation, desulfurization reaches 95%, and denitrification reaches 60%. Compared with other desulfurization agent cost, expense is saved by 80%. Because iron ion is used as additive and can form flocculant by itself, water is not turbid and deposition is accelerated in operation process.

Description

technical field [0001] The patent of the present invention relates to a device for integrating desulfurization, denitrification and dust removal by using coal ash and an external oxidant under acidic conditions. Background technique [0002] At present, in industrial enterprises, especially in mines, factory workshops and other places, a large amount of dust-containing gas is produced. All parties are trying to solve the problem of dust removal, desulfurization and denitrification during smoke exhaust. The existing dust removal equipment is expensive and occupies a large area. The desulfurization efficiency is low. The dedusting equipment uses the effective substances in the fly ash for many times under acidic conditions, and when necessary, desulfurizes, denitrogenates and dedusts by adding an oxidant. Reduce the cost of desulfurization per unit of use, and realize energy saving and emission reduction. Contents of the invention [0003] The purpose of the patent of the ...

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Application Information

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IPC IPC(8): B01D53/60B01D53/78B01D47/06
Inventor 李成岳
Owner 李成岳