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Denitration system for flue gas denitration by using chlorine dioxide and packed tower

A technology of chlorine dioxide and packed tower, applied in the field of denitrification system, which can solve the problems of high cost and poor denitrification effect of chlorine dioxide

Pending Publication Date: 2020-06-05
SHANDONG NORMAL UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the above technical problems, the present invention provides a denitrification system using chlorine dioxide and a packed tower for flue gas denitrification, which can solve the technical problems of poor chlorine dioxide denitrification effect and high cost in the prior art

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  • Denitration system for flue gas denitration by using chlorine dioxide and packed tower

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Embodiment Construction

[0073] best practice

[0074] combined with figure 1 , the present invention is described:

[0075] The packed tower is a cylinder with a diameter of 0.8m, a tower height of 5m, and a wall thickness of 8mm, made of 304L stainless steel. The flue gas inlet 1 is set on the top of the packed tower, and a 90° conical solid nozzle 2 is installed in the upper part of the tower. The nozzle 2 is a nitric acid distributor, and the nozzle 2 is connected to the acid inlet pipe 3 of nitric acid; the position 0.5 meters below the nozzle 2 A chlorine dioxide distributor 4 is arranged at the place, and the chlorine dioxide distributor 4 is a 120° solid conical atomizing nozzle, and the distance from the packing layer 6 is 0.5m. The chlorine dioxide distributor 4 is connected to the chlorine dioxide inlet pipe 5, and the chlorine inlet pipe 5 is connected to the chlorine dioxide generator 10, and a gas booster pump 11 and a flow regulating valve 12 are also arranged on the pipeline. The lowe...

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Abstract

The invention discloses a denitration system for flue gas denitration by using chlorine dioxide and a packed tower. The denitration system comprises a packed tower, a chlorine dioxide supply system and a nitric acid supply system, a packed layer is arranged in the packed tower; a flue gas inlet of the packed tower is arranged above the packed layer; the flue gas outlet is arranged below the packedlayer, the chlorine dioxide supply system conveys chlorine dioxide to the upper part of the packed layer of the packed tower through a chlorine inlet pipe, the nitric acid supply system conveys nitric acid to the upper part of the packed layer through an acid inlet pipe, NO in flue gas is oxidized by chlorine dioxide in the packed layer, and nitric acid absorbs the oxidation product at the same time. The problem of low denitration efficiency in a conventional oxidation technology is solved, and a packed tower is combined with chlorine dioxide and nitric acid to carry out denitration, and thedenitration system generates good economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of flue gas denitrification, in particular to a denitrification system for flue gas denitrification by using chlorine dioxide and a packed tower. Background technique [0002] Coal-fired power generation, steelmaking in steel mills, and other processes that use coal and petroleum as heat sources are one of the main sources of increased nitrogen oxides in the environment. In order to reduce the impact on the environment, various manufacturers have adopted many methods to reduce the emission of nitrogen oxides in the combustion tail gas ("flue gas" mentioned in the present invention), that is, to perform denitrification treatment on the flue gas. In general flue gas, NO often accounts for about 90% of the total nitrogen oxides, but NO is difficult to dissolve in water, so it is difficult to remove it by washing with water or neutralizing with nitric acid, which is also the difficulty of flue gas denitrificatio...

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Application Information

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IPC IPC(8): B01D53/75B01D53/76B01D53/78B01D53/56
CPCB01D53/56B01D53/75B01D53/76B01D53/78B01D2251/108B01D2258/0283
Inventor 刘明张菡英赵莉钤小平
Owner SHANDONG NORMAL UNIV