The core value of oxygen genertors in agriculture lies in the on-demand preparation of low-cost oxygen, which enables a large-scale, stable oxygen supply through PSA/VPSA technology. Combined with micro nano bubble dissolution technology, it can significantly increase the dissolved oxygen content in irrigation water (up to 15-30mg/L) and break through the bottleneck of soil permeability.
The future development direction is to couple photovoltaic power generation with energy reduction and to develop modular, portable devices that meet the needs of small and medium-sized farms.
Description of Oxygen Generator
Oxygen generators mainly concentrate oxygen from the air or decompose oxygen-containing compounds to produce oxygen through physical or chemical means. Their core principles include molecular sieve adsorption separation (PSA/VPSA). The working principles and applicable scenarios of different technical routes are as follows:
1. Working principle
Molecular sieve adsorption separation method (PSA/VPSA)
Core steps:Compressed air: The air is pressurized to 4-8 bar by a compressor.
Adsorption and impurity removal: Air passes through a zeolite molecular sieve bed (such as 13X type), and nitrogen (N ₂) and water vapor are preferentially adsorbed (molecular sieve pore size 3-5 Å, N ₂ molecular diameter 3.6 Å, O ₂ 3.46 Å), while oxygen penetrates and filters out.
Desorption regeneration: Reduce pressure to atmospheric pressure to release adsorbed nitrogen gas, and regenerate molecular sieves.
Purity and efficiency:Oxygen purity of 90% -95%, energy consumption of 0.4-0.6kWh/m3.
VPSA (Vacuum Pressure Swing Adsorption) can handle larger gas volumes and reduce energy consumption by over 30%.
2. Integration of agricultural oxygen supply system
Dissolving and enhancing technology:
Venturi jet injector
Inject oxygen output from the generator into the water flow, with a mixing efficiency greater than 80%.
Nanobubble generator
Breaks down oxygen into<1 μ m bubbles, with a water retention time of>24 hours, and the dissolved oxygen content can reach 10 times that of conventional methods.
Intelligent control
The soil oxygen sensor provides real-time feedback data and adjusts the power of the oxygen generator (such as automatically starting when dissolved oxygen is less than 5 mg/L).
3. Precautions
Molecular sieve maintenance: It needs to be replaced regularly (with a lifespan of 2-5 years) to prevent oil/dust blockage.
Safety protection: Fire prevention is required in high-concentration oxygen environments (steel ignition point reduced to 300 ℃), and grease sealing is prohibited in conveying pipelines.
Economy: The investment in PSA/VPSA equipment is relatively high, but the long-term operating cost is lower than that of liquid oxygen tanks.
This picture shows the oxygenation system used in the customer’s mushroom cultivation project, and the actual feedback is excellent. By using an oxygen generator combined with a micro nano bubble generator, the dissolved oxygen in the water is effectively increased, fully meeting the cultivation needs, and the growth performance of mushrooms is significantly improved.
The main advantages brought by this system include:
1.Increase yield: The vitality of mycelium is enhanced, the uniformity of mushroom production is high, and the yield is significantly increased.
2.Quality improvement: The mushroom has a full and plump shape, a white color, and significantly enhanced product attributes.
3.Disease prevention: effectively inhibit anaerobic harmful bacteria and reduce the risk of disease occurrence.
4.Efficient: shortened growth cycle, accelerated tide conversion, and improved utilization of planting facilities.
