Sand filtering device for aquaculture

Abstract

The invention discloses a sand filtering device for aquaculture. The device includes a sand filtering system and a backwashing system. The sand filtering system comprises a water inlet channel, and sand filtering areas are arranged on two sides of the water inlet channel respectively; the backwashing system comprises a backwashing clean water tank, a backwashing air source and a backwashing drainage channel, and a water outlet pipeline is arranged on the backwashing clean water tank. The backwashing system disclosed by the invention has backwashing water intake and backwashing air intake functions at the same time, so that the backwashing function of the sand filtering system is greatly improved; a gravel cushion layer is additionally arranged in the sand filtering areas to prevent quartzsand from blocking through holes in a backwashing gas distribution pipe and a water distribution pipe; civil engineering facilities are fully utilized for additional arrangement of a Chinese character"pin" shaped modular sterilization and disinfection apparatus so as to reach sterilization and disinfection effect on microbial pathogens in a water body; the sand filtering device is simple in design, reasonable in hierarchical layout, low in cost, economical and efficient, and overcomes the defects in the traditional technology, thus being a novel sand filtering device for aquaculture.

Description

technical field [0001] The invention relates to the field of aquaculture water source water treatment, in particular to a sand filter device for aquaculture. Background technique [0002] In recent years, with the development of the economy, the discharge of industrial sewage and domestic sewage has increased significantly, causing environmental pollution, river pollution, and coastal waters pollution; at the same time, periodic river water has become muddy and seawater pathogenic microorganisms have increased, resulting in Deterioration of source water quality. In the aquaculture industry, accidents of dead fish due to deterioration of water quality and pollution have occurred from time to time, and the survival rate of aquaculture has been greatly reduced, especially in the nursery industry that has very strict requirements on water quality. In recent years, due to regional environmental pressure, closed factory recirculating aquaculture has become the only way for the de...

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Problems solved by technology

However, due to its simple design and unreasonable structural layout, the backwashing system only adopts simple water backwashing, lacks water and gas synchronous backwashing, and the effect is poor, resulting in substandard water filtration and purification; at the same time, it also lacks necessary sterilization methods At present, many products and equipment have appeared in the market to replace the facility-type sand filter system, but because the equipment is expensive, the backwashing intensity is high, and the energy consumption is large, which greatly increases the cost of the aquaculture industry, which is not conducive to popularization.

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