Preparation method of slaked lime emulsion for wastewater treatment and apparatus thereof

Abstract

The invention provides a preparation method of slaked lime emulsion for wastewater treatment and an apparatus thereof, and relates to an industrial wastewater treatment apparatus. The invention solves the problems in prior art, such as many faults and a large amount of dust. The method comprises the following steps: slaked lime powder is added into a lime cabin; the slaked lime is vibrated and falls into a mixer; the slaked lime is metered and added; water is added through a sprayer for contacting the slaked lime in the mixer according to a ratio; the slaked lime and the water are stirred by air-flow; the slaked lime is mixed and dissolved with the water; the lime emulsion is formed and is added into each process point of waste water treatment by a pressure pump. The sprayer and the mixer are used for contacting and proportioning the slaked lime and the water, lower water inlet is changed into upper water inlet for arranging lime, so that mixing time is increased; with the effect of a water film of the sprayer, dust pollution of pulverized limestone is reduced, and blocking rate of a downcomer of lime is reduced. Air-flow stirring of the air-flow stirrer is used for improving mixing efficiency of lime and water, so that utilization rate of the slaked lime is improved, and capability of continuous operation of the apparatus is improved.

Description

Technical field [0001] The invention relates to an industrial wastewater treatment device, in particular to a method and device for preparing a slaked lime emulsion for acid wastewater treatment. Background technique [0002] In the treatment of industrial acidic water, lime is the most commonly used neutralizer. It has the advantages of low cost, good for flocculation and precipitation of sludge, and easy use during use. [0003] Currently, there are two types of lime dosing: dry and wet. Among them, a lime emulsion prepared by slaked lime and water is generally used in the wet dosing method to adjust the PH value of the water. [0004] The lime emulsion preparation device uses quicklime and slaked lime to make a certain concentration of lime emulsion through nitrification and dissolution. The made lime emulsion can be used to adjust the PH value of water, assist in coagulation of colloidal particles in wastewater, reduce water hardness, and perform industrial acid-containing wast...

AI Technical Summary

Problems solved by technology

In the prior art, the dissolving tank adopts the method of feeding water from the bottom, and the way of feeding from the top makes the mixing of lime and water insufficient, and the lime enters the dissolving tank and is still in a hardened state, the mixing time is short, and the lime cannot be completely eliminated in the water. Solution, part of the lime is pumped out without forming an emulsion state, the utilization rate of lime is low, and the lime concentration cannot meet the process requirements

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