High pressure ring blower: the fish pond is oxygenated and upgraded to escort efficient ecological farming
In aquaculture, dissolved oxygen is the "lifeline" of aquatic organisms such as fish, shrimp and crabs, and it is also the core factor that determines the culture density, survival rate and culture benefit. With the transformation of aquaculture to intensive and high density, the traditional oxygen-increasing equipment has been difficult to meet the needs of oxygen-increasing and uniform oxygen supply in deep water bodies.
With the advantages of high efficiency, energy saving and stability, the high-pressure blower has gradually become the core equipment for oxygen-increasing in fish ponds, injecting new impetus into modern ecological aquaculture and solving the pain points of hypoxia, water quality deterioration and high aquaculture risk in traditional aquaculture.
High pressure ring blower, also known as high-pressure blower and vortex air pump, is often used in conjunction with microporous aeration tray, nano-aeration tube and other equipment in the oxygen-increasing scene of fish ponds, and its core working principle revolves around "efficient oxygen transfer and global coverage".
When the high-pressure blower is started, the impeller rotates at high speed to generate a negative pressure area, which sucks and pressurizes the air from the air inlet, and then transports the high-pressure air to the aeration device at the bottom of the pool through the gas pipeline, and finally releases it evenly into the water body in the form of tiny bubbles.
These microbubbles are only 1-3 mm in diameter, with slow rising speed, long staying time in water and large contact area, which can fully dissolve oxygen into water, realize three-dimensional aeration from the bottom of the pool to the water surface, and completely solve the disadvantage that traditional aeration equipment can only act on surface water and deep oxygen deficiency. At the same time, the bubble rising process will drive the water body to convection up and down, break the stratification phenomenon of water temperature and dissolved oxygen, and transport the saturated dissolved oxygen generated by photosynthesis of phytoplankton on the surface to the bottom, effectively repay the oxygen debt at the bottom, and further improve the overall oxygen-increasing effect.
Compared with traditional aeration equipment such as waterwheel type and impeller type, high pressure ring blower shows irreplaceable advantages in pond aeration and becomes the key for farmers to reduce costs and increase efficiency.
First, the aeration efficiency is high and the energy consumption is low. Practice has proved that the dissolved oxygen efficiency of the high-pressure blower is more than 40% higher than that of the traditional aerator, and the dissolved oxygen per unit water body can quickly reach more than 4.5mg/L, while the energy consumption is only a quarter of that of the traditional equipment. The bottom aeration system of 3 kW can supply oxygen to 20 mu of pond at the same time. Compared with the energy consumption of the traditional aerator of 1,000 watts/mu, the long-term operation can greatly save the electricity bill, and the energy consumption can be reduced by 60% in some scenarios.
Secondly, the whole area is evenly oxygenated, which is suitable for diversified culture scenes. Whether it is an ordinary open-air fish pond, an industrial circulating water culture pond, a nursery pond or a wintering pond, the high-pressure blower can provide oxygen to the whole water area without dead ends through reasonable arrangement of aeration devices, which is especially suitable for deep ponds and high-density culture, and can provide a stable dissolved oxygen environment for fish, shrimp and crabs, and significantly improve the survival rate of nursery and finished product culture. For example, in the culture of Penaeus vannamei, the high-pressure blower can be used for oxygenation, and the stocking density per mu can be improved.
Third, improve water quality and reduce the risk of breeding diseases. Sufficient dissolved oxygen can activate aerobic microorganisms in water, accelerate the decomposition of organic substances such as residual bait and fish and shrimp feces, reduce the accumulation of sludge at the bottom of the pond, promote the escape of toxic gases such as ammonia nitrogen and hydrogen sulfide, reduce the contents of nitrite and Escherichia coli, and effectively avoid eutrophication and black odor in water. After the water quality is improved, the use of disinfectants and fungicides can be reduced, and the drug cost can be reduced from 0.5 yuan/kg to 0.2 yuan/kg.
At the same time, the stress reaction of fish and shrimp can be reduced, the incidence of diseases can be reduced, green ecological farming can be realized, and the quality and market competitiveness of aquatic products can be improved. Fourth, it is safe, stable and convenient to maintain. The high-pressure blower is designed for oil-free operation and installed on the shore, which avoids the risk of leakage of underwater equipment and being entangled by garbage, and will not pollute the water body; The equipment has simple structure, no moving parts under water, and low failure rate.
The maintenance cost is much lower than that of traditional oxygen-increasing equipment, and some models are equipped with frequency conversion function, which can adjust the air volume in real time according to the change of dissolved oxygen in water, further optimizing energy consumption.
In practical application, the selection, installation and use of high-pressure blower directly affect the oxygen-increasing effect and the service life of equipment. When selecting the type, it is necessary to comprehensively consider the fish pond area, water depth, culture density and breed: pond culture (10-30 mu, water depth 2-3 meters) can choose the model with air flow of 10-30m/min and pressure of 40-60kPa, and the supporting motor power is 11-30kW；; In high-density breeding or nursery ponds, it is necessary to appropriately raise the air volume and pressure standards, and reserve 10%-15% air volume redundancy to cope with the sudden drop of dissolved oxygen in rainy days and high temperature seasons.
At the same time, the open-air fish pond should be made of rain-proof, sun-proof and motor protection grade IP55 or above, and the mariculture should be made of 316L stainless steel to resist seawater corrosion. In terms of installation, two methods are commonly used: disc installation is simple and fast, and the aeration pipes are fixed on the steel plate frame, with 3-4 pieces installed per mu, 10-20 cm away from the bottom of the pool; The strip-type installation and distribution are more uniform. The total length of aeration pipes is 10-40m, the distance between pipes is about 10m, and it is also 15-20cm away from the bottom of the pool. During installation, it is necessary to ensure that the aeration devices are at the same level to ensure uniform gas supply. During use, the startup time should be arranged reasonably according to the change law of dissolved oxygen in water: it should be started at midnight in rainy days from April to May; Start the machine for 2-3 hours in the afternoon of June-October and 2-3 hours before and after sunrise.
In case of continuous rainy or low-pressure weather, start the machine continuously from 21: 00 at night to noon the next day; In the later stage of culture, it is necessary to start the machine frequently to ensure that the dissolved oxygen in the water remains in the best range of 6-8 mg/L. If possible, it can be matched with dissolved oxygen meter to realize accurate start-up and oxygenation.
In addition, daily operation and maintenance should also pay attention to details: check the filter device at the air inlet of the fan regularly to prevent dust and water vapor from entering the internal wear parts; Clean the aerator in time to avoid the blockage of micropores affecting the aeration efficiency; When installing the fan, ensure ventilation and heat dissipation, avoid direct sunlight and rain soaking, and prolong the service life of the equipment; After the end of the annual breeding cycle, it is necessary to thoroughly clean the pipes and aeration devices to prepare for the next round of breeding.
With the continuous upgrading of aquaculture industry, "energy-saving, high efficiency and ecology" has become the core trend of aquaculture development. As the upgrading equipment of fish pond aeration, high-pressure blower not only solves many pain points of traditional aeration mode, but also helps farmers to improve aquaculture density, reduce operating costs and improve product quality, which provides a reliable guarantee for intensive and large-scale aquaculture. Whether it is a small fish pond for ordinary farmers or a large aquaculture base, the rational use of high-pressure blower can achieve the dual goals of "increasing oxygen, improving quality, saving energy and increasing income" and promote the development of aquaculture industry in a green, efficient and sustainable direction. In the future, with the continuous optimization of technology, high-pressure blower will be combined with intelligent control system to realize automatic monitoring of dissolved oxygen and automatic adjustment of air volume, further reducing the labor cost of aquaculture and injecting more scientific and technological strength into modern aquaculture.