Six questions and six answers for aquaculture equipment aerator

At present, there are impellers, waterwheels, jets, water jets, inflatables, and vortex aerators in the market. What is the difference between their working principles?

Answer: The motor speed of the jet aerator is 2850 rpm, which directly drives the rotating shaft, rotates the blades, releases oxygen, and dissolves in water. The motor speed of other aerators such as impeller type, waterwheel type, water jet type aerator, inflatable type and eddy current type is 1450 rpm. They all use the reducer to convert the reduction ratio and put the air in The oxygen is dissolved into the water.

There are many types of aerators, different pond conditions, and different breeds. How should farmers choose to match aerators?

Answer: The climate of mainland China is divided into tropical, subtropical, temperate, and cold zones. There are also many breeds. The southern coast is dominated by shrimp farming. The ponds built are generally small, mostly below 5 acres, and the density is 100,000 to 350,000. /mu. Pond aeration is generally divided into three aspects: aeration on the surface, aeration on the middle, and aeration on the bottom.

A. The “source-pass” waterwheel aerator has higher efficiency when surface aeration. He uses a 36-slot motor, which saves 30% of the electrical energy than a domestic 24-slot motor. Up to 2m and depth of 1m.

B. Middle-layer aeration is generally represented by a jet aerator. This aerator can adjust different heights according to the depth of the pond. Through the high-speed rotation of the motor, the blades in the water can achieve the effect of aeration.

C. Bottom oxygenation generally uses a Roots fan to compress the air, and quickly transfer the oxygen in the air to the bottom of the pond through pipes and nanotubes.

Use cases of aeration equipment by region:

How to configure aerator in practical application?

Answer: The configuration amount of aerators is mainly determined by the conditions of water source, breeds, breeding density, total intake and drainage energy consumption, etc.

A. Water source status: Whether the water source is abundant and whether the water quality has always been good; if the water quality is good, you can consider less allocation, otherwise it is more, and change the water when the water quality is good.

B. Cultured species: Penaeus vannamei is an oxygen-consuming species, and the bottom fish of the four major fish requires less oxygen.

C. Breeding density (mu production): the higher the more, the lower the less.

D. Energy consumption of total intake and drainage: If the energy consumption of intake and drainage is less, the aerator can be considered less; the energy consumption is larger, and the configuration amount should be larger.

E. Economic Analysis: Consider the electricity price and relative price of fish and shrimp. If the local electricity price is relatively high and the price of fish and shrimp is relatively low, consider less allocation; otherwise, more allocation.

In the breeding process, how to use the aerator correctly in different time periods such as sunny noon, cloudy early morning and rolling rain in the middle of the night?

Answer: The aerator must be operated under safe conditions, and switch on and off according to the stocking density of the fish in the pond, the growing season, the water quality conditions of the pond, and weather changes. To correctly grasp the start-up time, "six open three open". "Six openings": 1) Turn on at noon on a sunny day; 2) Turn on at early morning on a cloudy day; 3) Turn on at midnight during rainy days; 4) Turn on at midnight during heavy rain; 5) Turn on in time when there is a large temperature difference; 6) Special circumstances Power on at any time. "Three no open": 1) do not turn on after sunrise in the morning; 2) do not turn on in the evening; 3) do not turn on in the rainy daytime. When there is a sudden change in the weather or the fish has a floating head due to a lot of water, fat, and fish, the startup time can be flexibly controlled to prevent floating heads or pan ponds from occurring.

During the breeding process, the aerator must be overhauled regularly. The motor, reducer, impeller, and floating body must be overhauled. The junction box that has been eroded by water should be replaced in a timely manner. At the same time, the overhauled parts should be placed in a ventilated and dry place, and then assembled into a complete machine when needed. .

How to maintain oxygen equipment?

Answer: Regardless of whether it is freshwater or marine aquaculture, after raising a fish and shrimp, you must take the aeration equipment to the shore to clean up algae and shellfish, remove the rusted parts of cast iron, and re-coat Rust paint. The northern breeding equipment is stored in the warehouse in winter to prevent frostbite of plastic parts.

Current status of domestic breeding equipment? Is there any research and development of new breeding equipment aimed at saving breeding costs?

A: Current status of domestic breeding equipment: Mutual imitation, plagiarism, lower quality and sales, and makeovers to produce high-energy-consuming products. Some production companies are blindly pursuing money. They do not consider the breeding efficiency and service life of farmers, and innovative aeration. There are few machine parts manufacturers, and few companies have R & D.