Novel and efficient wastewater flocculation treatment system and method

Abstract

The invention discloses a novel and efficient wastewater flocculation treatment system and method. The system comprises a dosing equipment unit, a rapid mixing unit, an efficient flocculation reactionunit and a mixed sludge reinforced granulation and clarification unit, wherein the dosing equipment unit used for adding the flocculant to wastewater is arranged in front of the rapid mixing unit formixing a flocculant and wastewater; the efficient flocculation reaction unit used for flocculating uniformly mixed wastewater containing the flocculant is arranged behind the rapid mixing unit; the mixed sludge reinforced granulation and clarification unit used for granulation and clarification of the flocculated wastewater from the efficient flocculation reaction unit is arranged behind the efficient flocculation reaction unit. The flocculant is added to wastewater through the dosing equipment unit, is stirred uniformly by the rapid mixing unit and enters the efficient flocculation reactionunit for a flocculation reaction and the mixed sludge reinforced granulation and clarification unit for granulation and clarification.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a novel waste water high-efficiency flocculation treatment system and method, and the waste water may be desulfurization waste water. Background technique [0002] Desulfurization wastewater has high salt content, high turbidity, high hardness, high chloride, and high sulfate; it contains heavy metals, fluorides, sulfides, ammonia nitrogen, silicon, organic matter, etc.; the water temperature is about 50°C; especially contains WHO and my country Strictly controlled pollutants, etc.; and affected by coal combustion, desulfurization process water quality, desulfurization agents, etc., desulfurization wastewater has complex components and frequent fluctuations. [0003] In recent years, with the increasingly prominent environmental problems, new environmental protection policies have been promulgated, and the implementation of environmental protection policies has been strengthen...

AI Technical Summary

Problems solved by technology

[0005] (1) Acid and alkali are added, equipment and pipelines are corroded and blocked seriously;

[0006] (2) The process is long, the one-time investment of equipment is large, the operating cost is high, and the task of equipment management and maintenance is heavy;

[0007] (3) There are many types of medicines, large reserves, and certain potential safety hazards;

[0008] (4) When the water quality composition, concentration, etc. fluctuate, multiple chemicals need to be coordinated and controlled at the same time, the on-site operation and control are complicated, and it is difficult for the on-site personnel to regulate and meet the standards;

[0009] (5) After the traditional "three-box" chemical precipitation method, the dissolved salt (mainly chloride, sulfate) and organic matter in the wastewater can hardly be removed

It can neither be directly discharged nor reused, and can only be used for dry ash humidity control, ash yard or coal yard spray, dry slag humidity control, wet slag removal water, natural or mechanical spray evaporation, etc.

However, the water consumption of dry ash humidity control, ash field spraying, dry slag humidity control, and wet slag removal is limited; natural or mechanical spray evaporation is restricted by weather and environmental factors; although coal field spraying can consume a certain amount of desulfurization wastewater treated effluent However, a large amount of alkali metal sulfate or chloride remaining in the water is brought into the combustion chamber of the boiler, causing ash deposits and slagging and severe corrosion on the inner wall of the furnace and the heating surface, and also increases the difficulty of the desulfurization system, and significantly reduces the sulfur gypsum. Improve conversion efficiency and increase the water production of desulfurization wastewater

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