Vertical mixing system for water current in estuary and control method

Abstract

The invention relates to a vertical mixing system for water current in an estuary and a control method. By using an electrically controlled water pump device (1) installed on a floating body platformon the marine water surface, fresh water in the surface layer is pumped when tide water rises and sprayed into a salt-water wedge in the bottom layer, vertical mixing of salt-fresh water is promoted so that salt water which remains in grooves at the river bottom and cannot be carried by moderate and small tides into a sea can be diluted, redundant chloride ions can enter a superficial water area and can be carried by large tides into the sea in time, the risk of taking the salt water can be reduced in the end, and the time for a water plant to take fresh water is prolonged. A salinity measurement meter (7) arranged on the upper stream is adopted to measure the concentration of the chloride ions in the water from the upper stream, so that the effect that the water discharge of the system can be self-adjusted is achieved, the form of an original salt-water wedge can be effectively destroyed, vertical water mixing is improved, the concentration of the accumulated salt water is reduced, and the situation is avoided that when the plant takes water in an estuary area, the concentration of the pumped river water is over high to cause unnecessary economic losses.

Description

technical field [0001] The invention relates to an estuary water flow vertical mixing system and a control method, belonging to the technical field of estuary salt water treatment. Background technique [0002] In river estuaries, the interface between saltwater in the ocean and freshwater in the river moves periodically forward and backward as tides and runoff reciprocate. Since the density of ordinary fresh water is 1g / cm 3 , the density of ordinary seawater is 1.025g / cm 3 , so in the irregular tidal estuary area, the seawater will form a wedge and lie under the fresh water. In the groove of the river bottom, the saltwater will stay here for a long time. If it is not dealt with in time, it will go up with the next high tide. The fusion of seawater leads to a higher concentration, and the saltwater accumulated in the groove cannot be brought out from the bottom of the estuary during the neap tide period, but it will go up a long distance with the tide during the spring ti...

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Problems solved by technology

However, one well with two pumps consumes a lot of energy, and the mobilization of water is also large, so a mature and perfect pipeline system is required

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