Efficient silicon and fluorine removal system and method for photovoltaic wastewater

Abstract

The invention discloses an efficient silicon and fluorine removal system for photovoltaic wastewater. The system comprises a homogenizing regulating tank, a shallow air floatation unit, a primary silicon and fluorine removal unit and a secondary fluorine removal unit which are connected in sequence, and sludge generated by the system is deeply dehydrated and then transported outwards. A self-priming pump is arranged between the homogenizing regulating tank and the shallow air floatation unit, the shallow air floatation unit, the primary silicon and fluorine removal unit and the secondary fluorine removal unit are connected through gravity flow pipelines, sludge generated by the system is pumped to a deep dehydration system through a sludge pump, and sewage enters a subsequent treatment unit after silicon and fluorine removal treatment; by reasonably arranging the treatment procedures, the silicon and fluorine removal effect is ensured, meanwhile, the chemical adding amount is saved, the operation cost is reduced, and stable operation of a subsequent treatment system is guaranteed.

Description

Technical field: [0001] The invention relates to the field of special industrial wastewater treatment, in particular to a high-efficiency silicon and fluorine removal system and method for photovoltaic wastewater. [0002] technical background: [0003] Photovoltaic enterprises use a large amount of hydrofluoric acid in the production links of cleaning, grinding, fine grinding, cutting, and etching of silicon materials, resulting in a large amount of high-concentration silicon- and fluorine-containing wastewater, which directly affects the follow-up treatment and recycling process. Stable operation. [0004] Most of the existing photovoltaic wastewater treatment methods only focus on the removal of fluoride, and do not consider the removal of silicon and its compounds, resulting in serious fouling of subsequent treatment pipelines and treatment facilities, making it difficult to operate normally, and the treated sewage cannot be recycled. There are a series of problems such ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a high-efficiency defluorination and silicon removal system for photovoltaic wastewater, which adds a silicon removal system on the basis of the existing photovoltaic wastewater defluorination process, and solves the subsequent treatment system pipes and facilities. The problem of reuse, through the selection of dosing agents and reasonable control conditions, reduces the amount of dosing and processing costs

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