Slaked lime dosing system in a water treatment system

Abstract

A slaked lime dosing system in a water treatment system, including a lime powder silo, a feeder is installed at the outlet of the lower end of the lime powder silo, the feeder is connected to a metering conveyor, and the metering conveyor is connected to a dosing conveyor through a transparent material pipeline. The doser is connected with a milk of lime solution tank, which is equipped with an automatic sand discharge valve, and the milk of lime solution tank is connected with the milk of lime dosing pool through the milk of lime dosing pipe. In the present invention, since the pipeline of transparent material is used, the transportation and flow of materials can be observed in the whole process, and once a blockage is found, it can be unblocked in time and conveniently handled. Due to the automatic sand discharge valve, the sand can be automatically discharged at regular intervals; the labor intensity of workers and the problem of sedimentation and blockage caused by sand particles are reduced, and the concentration of lime agent prepared by the lime dosing device remains stable, with an error of no more than ±0.5%, which can ensure that the input Add point pH value control is precise, the error is not more than ± 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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