Automatic preparation device and method for flocculant solution

Abstract

The invention discloses an automatic preparation device and a method for flocculant solution. The automatic preparation device comprises a powder silo, a screw powder supply mechanism, a measuring pocket, a mixer, a first dissolving tank, a second dissolving tank and a controller in sequence. The preparation method includes: delivering flocculant powder stored in the powder silo to the measuring pocket through the screw powder supply mechanism, feeding the powder into the mixer under the action of compressed air to enable the powder to be uniformly mixed with water under the pressure of 0.12-0.2MPa, allowing obtained mixed materials to sequentially enter the first and second dissolving tanks, and stirring to obtain the flocculant solution with mass concentration being 3-5%o. The automatic preparation device and method for the flocculant solution have the advantages that automatic control can be realized, thorough mixing and dissolving of flocculant in water can be guaranteed, the prepared flocculant solution can be directly fed to each dosing point through dosing pumps to guarantee the flocculant solution against deterioration failure caused by long-term storage, and accordingly influences on wastewater treatment effects are avoided.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to an automatic preparation device and method for a flocculant solution. Background technique [0002] Industrial steelmaking produces a large amount of wastewater from pickling, cold rolling and coating units. Since the suspended solids produced in wastewater treatment are tiny suspended particles and colloidal particles, they are dispersed and suspended in water, and are extremely difficult to settle and delaminate from water. The water content is high and the volume is large, which is very important for transportation and subsequent treatment. inconvenient. Therefore, in the process of wastewater treatment, it is necessary to add flocculants to several links such as emulsion neutralization tank, elevated tank, sedimentation tank, acid wastewater neutralization tank and suspension tank, so as to facilitate the subsequent dehydration process. [0003] Floc...

AI Technical Summary

Problems solved by technology

There are a series of problems in the specific use of this type of technology, for example: the flocculant dosing device directly uses the conveyor to send the powder into the waste water tank, and the flocculant powder is dosed through the control of the valve. It is easy to agglomerate, not easy to dissolve, and after a long time, it will block the valve or adhere to the conveyor, causing equipment failure and affecting the metering of powder

[0006] The existing device does not match the dissolution time and stirring speed during the preparation of the flocculant solution, and the flocculant has higher requirements on the stirring speed

If the stirring speed is too fast and the time is too short, the long-chain structure of the flocculant will be destroyed and the flocculation effect will be lost; if the stirring speed is too slow and the time is too long, the powder will not be fully dissolved, and will also agglomerate or deteriorate, which will block the subsequent dosing pipeline and cause Equipment failure, so it is necessary to determine the appropriate stirring speed and dissolution time according to the nature of the flocculant

In addition, due to the special properties of the flocculant, the concentration of the flocculant solution is required to be high. If the concentration is too high, the viscosity will be greater, and the liquid level gauge of some preparation devices will be easily bonded during use, and the pipeline will be easily blocked, thus affecting The preparation accuracy of the flocculant solution is improved

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