A double-rotation scr denitrification device with energy saving and emission reduction

Abstract

The invention belongs to the technical field of flue gas nitrifying, in particular to a double rotary type SCR (selective catalytic reduction) denitrifying device with energy-saving and emission-reduction effects. The double rotary type SCR denitrifying device comprises a box body, an ammonia gas cyclone atomizing spray nozzle, an ammonia water storage box, a waste gas intake module, a catalyst module and an ammonia gas collecting module, wherein the ammonia water storage box is used for storing the collected ammonia water; the ammonia gas cyclone atomizing spray nozzle is positioned at the right side of the waste gas intake module, and is arranged on the box body; the waste gas intake module is positioned above the ammonia water collecting box, and is used for leading the dedusted waste gas into the box body; the catalyst module is arranged in the box body, and is used for catalyzing the ammonia gas and the waste gas to react, so as to denitrify the waste gas; the ammonia gas collecting module is positioned at the upper end of the box body, and is used for collecting the unreacted ammonia gas, and the unreacted ammonia gas is dissolved in water to be reutilized. The double rotarytype SCR denitrifying device has the advantages that the waste gas of a thermal power plant is denitrified and dedusted, the dedusting effect is good, and the escape rate of ammonia gas is low.

Description

technical field [0001] The invention belongs to the technical field of flue gas denitrification, in particular to a double-rotation SCR denitrification device with energy saving and emission reduction. Background technique [0002] Nitrogen oxides are the most influential pollutants in air pollution. They can form photochemical smog, acid rain, destroy the ozone layer, and even cause serious greenhouse effects, which are extremely harmful to the human body, the environment and the ecosystem. Therefore, the treatment of nitrogen oxides and the improvement of denitrification technology are of great significance to the protection of the ecological environment and the sustainable development of our country. [0003] Studies have shown that due to the influence of the gas-solid contact area of ​​denitrification equipment at home and abroad, the flow field distribution of flue gas in the tower body is uneven, the contact time between flue gas and reducing agent and catalyst is lim...

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Problems solved by technology

[0006] In the above-mentioned patent documents, when the flue gas enters the flue gas inlet pipe, it is entrained and mixed with the ammonia gas sprayed by the swirl atomizing nozzle, and spirals in a tangential manner from top to bottom along the circumference of the first swirl catalytic reaction chamber. sinks, and under the action of the cyclone, it spirals up along the circumference of the second cyclone catalytic reaction chamber from bottom to top in a tangential manner, but this technical solution is not ideal for the removal of dust contained in the exhaust gas. It only depends on the gravity of the dust to settle, the dust removal efficiency is low, and the collection effect on the escape of ammonia gas is not good, and the collected ammonia gas cannot be reused

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