Thermal regeneration device and method for ammonium bisulfate poisoning denitration catalyst

Abstract

The invention relates to a thermal regeneration device and method for an ammonium bisulfate poisoning denitration catalyst. The device comprises a supply unit, a first thermal regeneration reaction unit, a second thermal regeneration reaction unit, an ammonia concentration detection unit and a driving unit, the first thermal regeneration reaction unit is used for communicating with the thermal regeneration medium supply unit, and the outlet end of the first thermal regeneration reaction unit and the inlet end of the second thermal regeneration reaction unit are respectively used for extending into the reactor to be connected with the inlet and the outlet of the same catalyst module; and the driving unit is used for driving the first thermal regeneration reaction unit and the second thermal regeneration reaction unit to move in the reactor, so that the first thermal regeneration reaction unit and the second thermal regeneration reaction unit are respectively connected with inlets and outlets of different catalyst modules. By means of the first thermal regeneration reaction unit and the second thermal regeneration reaction unit which are convenient to move, thermal regeneration of all catalyst modules in the whole denitration reactor is achieved, and the efficiency and safety of regeneration work are improved.

Description

technical field [0001] The invention belongs to the field of thermal regeneration of catalysts, and in particular relates to a thermal regeneration device and method for ammonium bisulfate poisoned denitrification catalysts. Background technique [0002] Waste incineration power plants will produce a large amount of NOx during the production process, and SNCR and SCR flue gas denitrification processes are the main ways for waste power plants to deal with NOx. With the continuous tightening of NOx emission standards, the SNCR method alone can no longer meet the requirements, and the SCR denitrification process has been adopted by more and more waste power plants as a supplement. The catalyst is the core of the SCR denitrification device. In the waste power plant, the temperature of the SCR denitrification device setting area is between 180 and 240°C. Under this temperature range, the SO in the flue gas 3 、H 2 O and reducing agent NH 3 The ammonium bisulfate (ABS) produced ...

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Problems solved by technology

However, this plan needs to add a separate biogas generation and incineration system, which requires a huge investment. At the same time, the regenerated heat flue gas is directly mixed with the original flue gas of the system, which puts forward higher technical requirements and practical operation difficulties for flow diversion and flow equalization. The disadvantages of economy and convenience are obvious

At the same time, there is a lack of timely and reliable methods for the technical evaluation of the completion of regeneration, and there are certain deficiencies in technology

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