Device and method for separating and collecting sand and scum in bottom mud sediment

Abstract

The invention relates to a device and method for separating and collecting sand and scum in bottom mud deposits, including a device shell, a self-mixing pipeline type agitator, a lotus-shaped sand settling device, a sand settling secondary separation device, and microporous aeration device and scum flotation unit. When the mixed sediment that needs to be separated is pumped into the pipeline mixer through the feed inlet, it moves downward under the action of gravity and push flow, coupled with the impact of microbubbles from the bottom-micro jet flow, the sediment with a larger specific gravity passes through the pipeline The type agitator enters the lotus-shaped grit settling device to accelerate its deposition at the bottom of the device shell, and then is pumped out through the sand pumping pipe; the sinking mud with a small specific gravity can be discharged through the mud pipe. At the same time as the sand is lifted, due to the turbulent mass transfer of the sinking mud and rising microbubbles, the scum is floated to the scum flotation device above the device for collection. This device realizes the efficient collection of scum in the bottom mud sediment and the separation and recovery of mud and sand, and has the characteristics of simple operation and continuous operation.

Description

technical field [0001] The invention belongs to the technical field of recycling utilization of bottom mud resources, and in particular relates to a device for separating and collecting sand and scum in bottom mud sediments and a method thereof. Background technique [0002] There are many ways to utilize sediment as a resource, mainly including direct land use, filling utilization, preparation of building materials, composting and fermentation, etc., and these are the utilization of sediment as a whole, which will limit the wide application of sediment. For example, when making bricks from bottom mud, the formula ratio of bottom mud should not exceed 50%, otherwise, the compressive and flexural strength of bottom mud bricks will be greatly reduced, which cannot meet the standard of market bricks, so bottom mud lifts sand and becomes bottom mud A necessary step before resourceization. [0003] At present, in the process of on-site collection of dredged sediment, a series of...

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Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the object of the present invention is to provide a device and method for separating and collecting sand and scum in bottom mud deposits, aiming at solving how to separate mud and sand, how to collect mud, Sand and scum and other problems

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