Method for regeneration of spent denitration catalyst

A denitrification catalyst and catalyst module technology, which is applied in the field of regeneration of invalid denitrification catalysts, can solve the problems that the active components of the catalyst cannot be selectively replenished, and the rust defects of the metal module frame cannot be effectively removed.
CN106902895AInactive Publication Date: 2017-06-30黑龙江丰迪环保科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
黑龙江丰迪环保科技有限公司
Publication Date
2017-06-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for regeneration of a spent denitration catalyst, and relates to a composition for a cleaning solution and an application thereof, and an activity recovering method for a spent SCR catalyst. The invention is used for solving the technical problems in the prior art that a lost catalyst active component in a regeneration process cannot be selectively supplemented and an iron rust defect of a metal module framework cannot be effectively eliminated. The method comprises the following steps: one, dust cleaning; two, spraying; three, cleaning; four, re-cleaning; five, acidification; six, pre-drying; and seven, activity supplementing. Cleaning media of sodium hydroxide and potassium hydroxide can dissolve inactivated V2O5 and toxic element arsenic on the surface of the catalyst. While the method can selectively supplement the catalyst active component (TiO2), the iron rust removal rate of the metal module framework reaches 19% to 24%. The invention belongs to the field of spent denitration catalyst regeneration.
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Description

technical field

[0001] The invention relates to a composition for cleaning liquid, its application and a method for restoring the activity of the spent SCR catalyst. Background technique

[0002] my country mainly uses coal as the main energy structure, and its combustion emits a large amount of nitrogen oxides (NOx) into the atmosphere, which is an important precursor of pollution events such as regional smog and acid rain, and is the most important air pollutant in my country. one. In this situation, my country's environmental regulations on NOx emissions have become more stringent since the "Twelfth Five-Year Plan". The "Emission Standards of Air Pollutants for Thermal Power Plants" implemented on January 1, 2012 stipulates that the NOx emission of newly built thermal power units must reach 100mg / Nm 3 . On August 23, 2014, the National Development and Reform Commission, the Ministry of Environmental Protection, and the National Energy Administration jointly issued the "...

Claims

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