Equipment and process for removing cyanobacteria provenance overwintering at the bottom of the lake

Abstract

The invention discloses lakebed overwintering cyanobacteria provenance removing equipment and a process thereof. The lakebed overwintering cyanobacteria provenance removing process comprises the following steps of natural coagulating sedimentation, enhanced sedimentation and mechanical dehydration. Equipment for realizing the process comprises at least seven sealed cabins, a drawing head, a waterwheel, a three-dimensional travelling crane, an underwater travelling paddle wheel and a centrifugal machine. The sealed cabins form a carrier platform. The drawing head, the waterwheel, the three-dimensional traveling crane, the centrifugal machine and the underwater traveling paddle wheel are sequentially arranged on the carrier platform from left to right. The lakebed overwintering cyanobacteriaprovenance removing equipment and process are scientific, reasonable and safe and convenient to use, the lakebed overwintering cyanobacteria provenance can be removed before the cyanobacteria recovery season, the scale and time of whole lake cyanobacteria bloom in the next year are delayed, and the lakebed overwintering cyanobacteria provenance removing equipment and process have great benefits for preventing local water area algal source flooding and reducing bottom mud nutrient salt release.

Description

technical field [0001] The invention relates to a process for clearing the provenance of overwintering cyanobacteria at the bottom of a lake, including natural coagulation sedimentation, enhanced sedimentation, and mechanical dehydration. [0002] The invention also relates to equipment for clearing the source of overwintering cyanobacteria at the bottom of the lake, including at least seven sealed compartments, a suction head, a water wheel, a three-dimensional driving vehicle, an underwater walking paddle wheel, and a centrifugal machine. Background technique [0003] At present, more than 66% of the key lakes and reservoirs in my country are at the level of eutrophication, of which 22% are medium eutrophication and super eutrophication. great concern. [0004] In recent years, my country has made rapid progress in the research on the causes of cyanobacterial blooms. Some researchers have proposed a "four-stage theory" for the formation of cyanobacterial blooms. stage. Du...

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Problems solved by technology

[0006] The bottom flocculent surface sediments rich in overwintering cyanobacteria need to be effectively quantitatively removed by negative pressure suction. The sediment is sucked into the suction head through negative pressure, enters the delivery pipeline and is extracted to the carrier platform. The entire suction head can During the traveling operation, it fluctuates up and down with the bottom terrain, so that the extraction head can fit the bottom of the water and improve the extraction efficiency. When the lake bottom overwintering cyanobacteria provenance removal equipment is fully loaded, the total mass exceeds 100 tons, and 10 underwater extraction heads are towed behind. , to drive such a giant and overcome underwater resistance, the traditional propeller propulsion method obviously cannot meet the requirements, so a special underwater walking paddle wheel is designed to provide traction for the equipment

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