Blue alga and aquatic plant treatment ship and method

Abstract

A blue alga and aquatic plant treatment ship comprises a liftable water feeding system, a pretreatment tank, an ionic gas flotation device and a precipitation accelerating tank which are arranged on a cabin or deck, wherein the liftable water feeding system is communicated with the pretreatment tank through a raw water pump or a pipeline, the pretreatment tank is communicated with the ionic gas flotation device through a secondary pump and a pipeline, and the ionic gas flotation device is communicated with the precipitation accelerating tank through a clear water outlet pipeline. The ship further comprises an alga slurry tank communicated with the pretreatment tank and the ionic gas flotation device, and an alga slurry dewatering system is arranged in the alga slurry tank. According to the glue alga and aquatic plant treatment ship and method, the blue alga and aquatic plant treatment system is arranged on the cabin and the deck of the ship and becomes a mobile blue alga treatment work station. Larger algae in inflow water can be removed through a blue alga pretreatment device comprising the liftable water feeding system, the pretreatment tank, a rotary filter belt and the like, and raw water filtrate with certain concentration enters the efficient ionic gas flotation treatment device to be treated and is discharged after meeting the standard.

Description

technical field [0001] The invention relates to a ship for treating cyanobacteria and water plants and a method for treating cyanobacteria and water plants. Background technique [0002] Existing cyanobacteria salvage ships use filtration technology to filter raw water, which is divided into pressure filtration and gravity filtration. Since the concentration of algae in algae water changes with the eutrophication of the water body, in most cases the water contains algae cells. The quantity is large, the density of the filter screen is too dense, it will be blocked frequently, and the filter screen is too loose, it will not be able to filter. Therefore, the existing cyanobacteria salvage ship technology has a poor treatment effect, and neither gravity filtration nor pressure filtration can effectively remove algae cells, especially a large number of microalgae cells, and the water output effect is poor. If the filter material is blocked, it needs to be stopped for maintenanc...

AI Technical Summary

Problems solved by technology

[0002] Existing cyanobacteria salvage ships use filtration technology to filter raw water, which is divided into pressure filtration and gravity filtration. Since the concentration of algae in algae water changes with the eutrophication of the water body, in most cases the water contains algae cells. The quantity is large, the density of the filter screen is too dense and it will often be blocked, and the filter screen is too loose, it will not be able to filter

Therefore, the existing cyanobacteria salvage ship technology has a poor treatment effect, and neither gravity filtration nor pressure filtration can effectively remove algae cells, especially a large number of microalgae cells, and the water output effect is poor. If the filter material is blocked, it needs to be shut down for maintenance, which is time-consuming and labor-intensive. The maintenance and management work is heavy and the work efficiency is low.

[0003] In the prior art, the filtration of cyanobacteria and aquatic plants basically adopts polyurethane belt filtration. In order to improve the phenomenon of clogging the filter material, it is necessary to set up water pipes halfway for backwashing to remove the blockages in the pores of the filter belt. This method has three major disadvantages: 1. Rinsing water needs to be stored

2. It needs to be shut down during backwashing

3. Backwashing is easy to cause secondary pollution

In addition, in the traditional air flotation device, it is inevitable that mud, sand or flocs will sink to the bottom of the pool. In order to prevent the mud and sand from the bottom of the pool, the outlet pipe is generally suspended at a height of 300mm.

In the traditional air flotation device, the residence time of the water body is generally controlled at 20-30 minutes; the dissolved air system is equipped with a dissolved air tank, and if calculated according to the actual volume of the dissolved air tank, its hydraulic retention time is 2-4 minutes; the slag scraper The scum layer is regularly removed, and it is impossible to selectively clean it according to the floating time of the scum, so it not only disturbs the water body, but also has a large moisture content of the scum

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