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Spray absorption type system for simultaneous desulphurization and denitration of sintering flue gas

A technology for desulfurization, denitrification, and sintering flue gas, which is applied in the fields of air quality improvement, combined device, and dispersed particle separation. Cost, low cost effect

Active Publication Date: 2015-02-04
SOUTHEAST UNIV
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  • Abstract
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Problems solved by technology

[0004] In addition, sintering flue gas has a large amount of flue gas, NO x Low concentration (generally 200-700 mg / m 3 ), low temperature and large changes (generally 80-180°C), it is not suitable to use high-temperature denitrification methods such as selective catalytic reduction or selective non-catalytic reduction

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  • Spray absorption type system for simultaneous desulphurization and denitration of sintering flue gas
  • Spray absorption type system for simultaneous desulphurization and denitration of sintering flue gas

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] like figure 1 Shown is a spray absorption sintering flue gas simultaneous desulfurization and denitrification system, including flue gas reaction and purification system, new solution addition system and recirculation solution system.

[0033] The flue gas reaction and purification system includes a first bag filter 1, a spray absorption tower 2, a second bag filter 3 and a chimney 4; the gas outlet of the first bag filter 1 is connected to the flue gas inlet of the spray absorption tower 2, and the spray The flue gas outlet of the absorption tower 2 is connected to the gas inlet of the second bag filter 3, and the gas outlet of the second bag filter 3 is connected to the chimney 4; wherein the flue gas inlet of the spray absorption tower 2 is set in the middle of the spray absorption tower 2, in the The top of the spray absorption tower 2 is provided with a sp...

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Abstract

The invention discloses a spray absorption type system for simultaneous desulphurization and denitration of sintering flue gas; the system includes a flue gas reaction and purification system, a new solution adding system and a recirculation solution system, the flue gas reaction and purification system comprises a first cloth bag dust collector, a spray absorption tower, a second bag dust collector and a chimney, the new solution adding system comprises a sintering lime solution tank, an oxidant solution tank and a mixing digestion tank, and the recirculation solution system includes a recirculation desulfurization denitration slag filtering device, a recirculation oxidation absorption liquid pool and an oxidation absorption liquid tank. The system aims to use lime produced in sintering process for desulfurization and meanwhile removal of nitrogen oxides in the sintering flue gas, and is a high-efficiency energy-saving cost-saving flue gas purification system and method.

Description

technical field [0001] The invention relates to a system for simultaneously desulfurizing and denitrifying sintering flue gas of a spray absorption type, which belongs to flue gas purification technology. Background technique [0002] According to the statistics of the iron and steel industry department, in all production processes of iron and steel complexes (including mining and dressing, sintering (pellet), coking, ironmaking, steelmaking and steel rolling): nitrogen oxides (NO x ) has the highest emission per ton of product, and the NO emitted in the sintering process x Accounting for nearly 55% of the main process of iron and steel; sulfur dioxide (SO 2 ) has the highest emissions per ton of product, and SO emissions from the sintering process 2 It accounts for more than 70% of the main process of iron and steel. Therefore, the control of flue gas nitrogen oxides and sulfur dioxide in the sintering process is the focus of reducing the emission of nitrogen oxides in i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D50/00B01D53/78B01D53/60
CPCY02A50/20
Inventor 李颖钟文琪居静
Owner SOUTHEAST UNIV
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