Rotary filtration, concentration and sewage discharge device and method for shrimp pond

Abstract

The invention discloses a rotary filtration, concentration and pollution discharge device and method for a shrimp pond. The device is characterized by comprising a sewage suction pipe and a water pump which are arranged in a culture pond, and an outer cylinder which is arranged inside / outside the culture pond and is through up and down, a filter screen lifting basket, a filter cylinder and a filtered water pipe are sequentially arranged in the outer cylinder from top to bottom, and a sewage collection bin is arranged at the bottom of the outer cylinder; a blow-off pipe with a blow-off valve is arranged at the bottom of the sewage collection bin; a top outlet of the sewage suction pipe penetrates through the outer cylinder wall to be communicated with the filter screen lifting basket, the top of the filter cylinder is closed, an opening is formed at the bottom of the filter cylinder, the filter cylinder is in butt joint communication with the filtered water pipe, the filtered water pipe is connected with the water pump, and a water outlet pipe of the water pump is connected with a plurality of water ejectors; and an impeller is arranged at a top inlet of the filtered water pipe, a rotating shaft fixedly connected with the filter cylinder is fixedly arranged in the center of the impeller, and a plurality of mud scraping plates are arranged between the outer cylinder and the filter cylinder, the device has the advantages that shrimp shells, dead shrimps and sick shrimps with poor vigor can be separated in time, residual feed and excrement are concentrated and then discharged, and the water consumption of sewage discharge is low.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a device and method for rotating, filtering, concentrating and discharging sewage in a shrimp pond. Background technique [0002] In shrimp farming, it is necessary to promptly discharge residual bait, feces, shrimp shells, dead shrimp, and diseased shrimp with poor vitality from the farming system, so that the farming system can maintain a good water quality environment for a long time, reduce diseases, and protect shrimps. survival rate and breeding success rate. In addition to the circulating aquaculture mode, which continuously discharges the water in the aquaculture pond, and then returns it to the aquaculture pond after a series of physical and biochemical purification, most of the current shrimp aquaculture methods still adopt the direct discharge method, that is, through the center of the bottom of the pond. Sewage collection device, regularly discharge r...

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Problems solved by technology

The devices proposed by these two inventions can only collect shrimp shells, dead shrimp, and diseased shrimp with poor vitality, so as to prevent overflow and escape of shrimp, but there is no interception of the most important pollutants such as residual bait and feces that cause water pollution in aquaculture. It can only be connected to the subsequent separation device for further separation and treatment. It is an intermediate device used in the water purification device in the circulating aquaculture system. It cannot guarantee the quality of aquaculture water when used alone.

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