Online regeneration catalytic denitration and dioxin removal reaction device

Abstract

The invention provides an online regeneration catalytic denitration and dioxin removal reaction device. The device comprises an SCR reaction mechanism, a flue gas regeneration mechanism and a desulfurization mechanism. The SCR reaction mechanism comprises a plurality of SCR reactors, an ammonia injection assembly and an ammonia-flue gas static mixer; wherein the inlet end of the ammonia-flue gas static mixer is respectively connected to the ammonia injection assembly and a flue gas inlet pipeline, an outlet pipeline is respectively connected to inlets of the SCR reactors correspondingly, the inlet end of the flue gas regeneration mechanism is connected to a flue gas exhaust pipeline, and the outlet end of the flue gas regeneration mechanism is respectively connected to inlets of the SCR reactors correspondingly. On the premise of not firstly raising the temperature for desulfurization, the online regeneration catalytic denitration and dioxin removal reaction device provided by the invention adopts an integrated catalytic denitration and dioxin removal catalyst to achieve up-to-standard emission of flue gas, and under the condition of catalyst poisoning and failure in high-sulfur content flue gas, online regeneration can be realized.

Description

Technical field: [0001] The invention relates to the technical field of denitrification reaction, in particular to an online regenerative catalytic denitrification and dioxin removal reaction device. Background technique: [0002] In the follow-up flue gas treatment systems of many domestic hazardous waste and chemical industry incineration plants, they all face the same dilemma, that is, due to the complex types of hazardous waste involved in the incineration and high sulfur and nitrogen content, the incineration process will A large amount of nitrogen oxides and sulfur dioxide are produced. In order to achieve the standard discharge of flue gas, denitrification must be carried out. However, in order to achieve the best efficiency of the catalytic denitrification catalyst, the traditional process is to remove the sulfur dioxide in the flue gas to below 50mg / NM3, and then By means of heating, the desulfurized flue gas is heated to about 180-200°C for catalytic denitrificatio...

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Problems solved by technology

[0002] In the follow-up flue gas treatment systems of many domestic hazardous waste and chemical industry incineration plants, they all face the same dilemma, that is, due to the complex types of hazardous waste involved in the incineration and high sulfur and nitrogen content, the incineration process will A large amount of nitrogen oxides and sulfur dioxide are produced. In order to achieve the standard discharge of flue gas, denitrification must be carried out. However, in order to achieve the best efficiency of the catalytic denitrification catalyst, the traditional process is to remove the sulfur dioxide in the flue gas to below 50mg / NM3, and then By means of heating, the flue gas after desulfurization is heated to about 180-200°C for catalytic denitrification. Although the flue gas can meet the emission standards of this traditional process, its operation is uneconomical and the production cost is high.

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