Treatment method of high-vanadium regeneration wastewater of SCR (selective catalytic reduction) denitration catalyst

Abstract

The invention discloses a treatment method of high-vanadium regeneration wastewater of an SCR (selective catalytic reduction) denitration catalyst. The treatment method comprises the steps of: a: allowing the wastewater to enter a presedimentation tank for sedimentation, b: allowing the wastewater to enter a flow cell, adding an NaOH agent into the flow cell and then allowing the wastewater to flow into a wastewater tank, c: lifting the wastewater to an iron-carbon micro-electrolysis tank with a pump, d: allowing the wastewater to enter a triple tank, adding FeSO4 into a reaction tank, addingalkali into a neutralization tank and adding a coagulant aid into a flocculation tank, e: allowing the wastewater to enter a sedimentation tank for sedimentation to remove vanadium and other heavy metals from the water, f: allowing the wastewater to automatically flow into an integrated MBR (membrane bioreactor) system, h: allowing the MBR system to suck and pump the wastewater to an ozone oxidation tower for further removal of difficulty degradable organic substances and decoloration, and i: allowing the wastewater to flow into a clean water tank automatically, wherein the triple tank comprises the reaction tank, the neutralization tank and the flocculation tank that are arrayed in sequence. The method has the benefits that the treatment efficiency of the high-vanadium regeneration wastewater of the SCR denitration catalyst can be improved; the treatment cost is lowered; and the volume of a solid waste is reduced.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a method for treating regenerated waste water of a high-vanadium SCR denitrification catalyst. Background technique [0002] Thermal power plants burn a large amount of coal to produce electricity, and the flue gas after combustion contains a considerable proportion of nitrogen oxides, which need to be treated with SCR denitrification catalysts to reduce the content of nitrogen oxides and meet the emission standards. The SCR denitration catalyst needs to be regenerated after a period of use to restore its catalytic activity. At present, SCR commercial catalysts basically use TiO2 as the base material, V2O5 as the main active component, and WO3 and MoO3 as anti-oxidation and anti-poisoning auxiliary components. Chinese patent document CN104667997A disclosed "a SCR catalyst regeneration method" on June 3, 2015, which is aimed at vanadium-containing SCR denitrati...

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Problems solved by technology

[0003] The technical problem to be solved in the present invention is that the existing high-vanadium SCR denitrification catalyst regeneration wastewater is high in vanadium, high in organic matter, and heavy metals, has poor biodegradability, high pollution, high processing difficulty, and large waste volume, thereby providing a high-vanadium SCR The denitrification catalyst regeneration wastewater treatment method can improve the treatment efficiency, reduce the treatment cost and reduce the volume of solid waste

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