Slaked lime feeding system in water processing system

Abstract

The invention provides a slaked lime feeding system in a water processing system. The slaked lime feeding system comprises a lime powder bin. An outlet of the lower end of the lime powder bin is provided with a feeding machine. The feeding machine is connected with a metering conveying machine. The metering conveying machine is connected with a feeder though a pipeline made of transparent materials. The feeder is connected with a lime milk solution. The lime milk solution tank is provided with an automatic sand draining valve and communicated with a lime milk feeding water tank through a lime milk chemical feeding pipe. According to the slaked lime feeding system, through the pipeline made of the transparent materials, the whole process of material conveying and flowing can be observed, and dredging can be conducted conveniently and timely once blocking is found; due to the fact that the automatic sand draining valve is arranged, automatic sand draining can be conducted regularly; the labor intensity of workers is lowered, deposition and blocking caused by sand grains are reduced, the concentration of a lime agent prepared through a limb chemical feeding device keeps stable, the error does not exceed + / -0.5%, precise control over the PH value of feeding points can be guaranteed, and the error does not exceed + / -0.3.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a slaked lime dosing system in a water treatment system. Background technique [0002] Slaked lime (scientific name calcium hydroxide, chemical formula Ca(OH) 2 ) is a commonly used agent in water treatment systems, and is widely used in industrial water supply, urban reclaimed water and various waste water treatment fields, as well as advanced reclaimed water treatment, desalination pretreatment, desulfurization wastewater treatment and other processes. In the water treatment system adding slaked lime, the quality of the effluent depends on the accuracy of the pH control after the lime milk is added and the continuous operation of the lime dosing equipment. [0003] The traditional dry lime dosing system generally uses a star feeder to transport lime powder to the lime milk solution tank through mechanical vibration and screw conveying. As a large amount of...

AI Technical Summary

Problems solved by technology

As a large amount of water vapor generated during the lime milk preparation process rises along the feeder to the bottom of the powder bin, the feeding pipeline is easily blocked, resulting in large lime measurement errors; the mechanical vibration process is very noisy, the fly ash is serious, and the working environment is harsh

In addition, most of the existing milk of lime dosing methods use slurry pumps to directly dosing into the pool, lime metering is only linked to the incoming water flow, resulting in lagging pH feedback and untimely adjustments

When dosing, the pH fluctuation range is large, and the control is not precise; the dosing pipeline is hard-connected, lacks a pipeline flushing system, and the frequency of pipeline blockage is high

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