Micro-nano bubble oxygenation irrigation system with precise feedback control

Abstract

The invention discloses a micro-nano bubble oxygenation irrigation system with precise feedback control, which comprises a nutrient filling unit, a micro-nano bubble generation device and a dissolvedoxygen concentration detection feedback unit, the micro-nano bubble oxygenation irrigation system is characterized in that the right side of the micro-nano bubble generation device is in fixed connection with a venturi feeding device, the upper end of the venturi feeding device is spirally mounted with a first pressure gauge, and the right side of the venturi feeding device in fixed connection with a left-handed gas filling device and a right-handed gas filling device. By mounting the nutrient filling unit, the micro-nano bubble generation device and the dissolved oxygen concentration detection feedback unit, the requirement of oxygenation concentration and oxygen source ratio according to the types of crops and various growth periods can be realized, and oxygenation concentration and thetype of gas sources can be set.

Description

technical field [0001] The invention relates to the technical field of micro-nano bubble oxygenation equipment, in particular to an accurate feedback-controlled micro-nano bubble oxygenation irrigation system. Background technique [0002] At present, in the process of plant growth, the amount of dissolved oxygen in irrigation water is an important factor affecting the growth and development speed. If the dissolved oxygen is sufficient, the growth will be fast. If the dissolved oxygen is low, the growth will be slow, and it will be lower than the critical value of dissolved oxygen required by plants. There will also be root rot due to hypoxia, so in terms of production, increasing dissolved oxygen in water is the main technology for crop irrigation. No matter how diverse the cultivation mode is in the circulation mode, it is ultimately based on the improvement of dissolved oxygen as the feasibility of its mode. Guarantee, all technical measures that can increase dissolved ox...

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Problems solved by technology

[0004] In traditional gardening and crop irrigation, measures such as air pump oxygenation are generally used to increase the dissolved oxygen in water, but this method of air injection has large bubbles, which makes it difficult to rapidly increase the dissolved oxygen in irrigation water, and the bubbles are preserved in the soil. The time is short and the utilization efficiency is low. In order to enhance the persistence of oxygenation, many scholars have proposed to use pure oxygen micro-nano bubbles for oxygenation irrigation. For example: Chinese patent CN202823183U discloses irrigation water oxygenation equipment for increasing the dissolved Oxygen content, using air or pure oxygen as the oxygen source, to achieve good results

However, this method can only be used to add oxygen to the water source, and it cannot be directly connected to the irrigation pipeline for direct use. It will also cause rapid growth of aerobic microorganisms and some algae in the irrigation and nutrient solution, which will increase the risk of blockage of the emitter

Chinese patent CN103858730B discloses an irrigation water micro-nano bubble oxygenation system. The dissolved oxygen concentration of this system is indirectly measured by a flow meter, which cannot truly reflect the dissolved oxygen value in irrigation water.

Moreover, micron-scale bubbles are produced, and the residence time in water is less than one hour. There may be problems for large-scale irrigation: when the end of irrigation is reached, the oxygen bubbles may have dissipated.

Chinese patent CN102765797B discloses an irrigation water oxygenation device. The bubbles of this system can reach the micro-nano level, but the water output of a single micro-nano bubble generator is only 1m3 / h, and large-scale irrigation requires multiple micro-nano bubbles to generate device, the equipment cost is high; how to design a new micro-nano bubble oxygen irrigation system is very important

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