Ammonia spraying pipeline and denitration ammonia spraying device

Abstract

The invention relates to the technical field of denitration ammonia spraying devices, in particular to an ammonia spraying pipeline and a denitration ammonia spraying device. The ammonia spraying pipeline comprises an ammonia spraying pipeline body, a nozzle and protective angle steel, wherein the nozzle is arranged on the ammonia spraying pipeline body and is communicated with the interior of the ammonia spraying pipeline body; the protective angle steel is arranged on the outer surface of the ammonia spraying pipeline body, is arranged at a near-wind end of theflue gas flowing direction S2 relative to the nozzle, and is suitable for at least partially covering the nozzle; the section, which is perpendicular to the ammonia gas conveying direction S1, of the ammonia spraying pipeline body is of a water-drop-shaped structure; and the size of the maximum width part of the ammonia spraying pipeline body vertical to the flue gas flowing direction S2 is smaller than that of the maximum width part of the ammonia spraying pipeline body parallel to the flue gas flowing direction S2. According to the ammonia spraying pipeline, the wind blocking area of the ammonia spraying pipeline can be reduced as much as possible, the resistance of a system is reduced, the efficiency of the system is improved, and precise energy saving is achieved.

Description

technical field [0001] The invention relates to the technical field of denitrification ammonia injection devices, in particular to an ammonia injection pipeline and a denitrification ammonia injection device. Background technique [0002] Flue gas from thermal power plants contains a large amount of nitrogen oxides. If these exhaust gases are not treated, they will cause pollution and form acid rain when they are discharged into the atmosphere. In order to reduce the emission of nitrogen oxides, it is necessary to denitrify the flue gas after combustion. In the prior art, thermal power plants often need to use flue gas denitrification devices. Many ammonia injection devices are installed in the vertical section of the denitrification reactor for the injection of ammonia gas. Ammonia gas is used as a reducing agent. Nitrogen oxides are released from the reaction in the vessel. The existing ammonia injection device is made of circular steel pipes, holes are opened on the circ...

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the projected area of ​​the ammonia injection pipe occupies a relatively large proportion of the cross-sectional area of ​​the flue in the flue, thereby providing a method to reduce the flow rate of the ammonia injection while ensuring that the flow rate of the ammonia injection remains unchanged. The ratio of the projected area of ​​the small pipe in the flue to the ammonia injection pipe

[0005] Another technical problem to be solved by the present invention is to overcome the defect in the prior art that the projected area of ​​the ammonia injection pipe occupies a relatively large proportion of the cross-sectional area of ​​the flue in the flue, thereby providing a method of reducing the flow rate of the ammonia injection while keeping the flow rate of the ammonia injection unchanged. The ratio of the projected area of ​​the small pipe to the flue is a denitrification and ammonia injection device

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