Acid and chlorine adding control method and system capable of preventing drip irrigation emitter from being blocked

Abstract

The invention relates to an acid and chlorine adding control method and system capable of preventing a drip irrigation emitter from being blocked. The method includes (1) chemically adding acid and chlorine in coordination with pipeline washing; (2) a system head acid chlorine adding calculation method based on tail pH control. Acid and chlorine adding in coordination with pipeline washing specifically includes the steps of firstly, adding acid 0.5-1.5mg / L in concentration to a drip irrigation system for 20 minutes to 1 hour to allow the drip irrigation system to be in a meta-acid state; secondly, adding chlorine 0.8-2.5mg / L in concentration to the drip irrigation system for 1-3 hours to inhibit the growth of blocking substance biological films and promote the same to fall off; thirdly, washing the drip irrigation system to discharge the fell-off blocking substance out of the system so as to reduce the blocking risk of the drip irrigation emitter. By the method, the washing water of the previous row and previous line of a rotation irrigation group is used as the drip irrigation water of the next row and next line of the rotation irrigation group, water resources are saved, and water resource utilization is maximized. The method is widely applicable to crop field drip irrigation.

Description

technical field [0001] The invention relates to a control method and system for preventing clogging, in particular to a control method and system for adding acid and chlorine to prevent clogging of drip irrigation emitters. Background technique [0002] The shortage of water resources in our country is deepening day by day. If no effective measures are taken, the shortage of water resources will become a major factor restricting the development of our country. Agricultural water consumption accounts for 70% of the country's total water consumption, of which farmland drip irrigation water consumption accounts for 90% to 95% of agricultural water consumption. Drip irrigation is recognized as one of the most water-saving irrigation technologies in the world because of its precise controllability, energy saving and production increase. The emitter is the most critical component of the drip irrigation system, and the emitter flow path is narrow (generally only 0.5-1.2mm), and im...

AI Technical Summary

Problems solved by technology

At present, many experts and scholars have proposed anti-clogging systems and methods for emitters, such as the use of filtration systems, pipe network systems and drip irrigation emitters. Although it is a good solution to the existing drip irrigation systems that are prone to blockage when using recycled water drip irrigation However, it only strengthens the filtration measures, and the relationship between the clogging of emitters and the formation and growth of internal biofilms has not been paid attention to, so that it cannot effectively inhibit the growth of biofilms and promote the shedding of biofilms, etc.

Although the drip irrigation system with the aid of an ozone generator effectively kills microorganisms in the flow channel, its structure is relatively complicated and the cost is high, so it is not suitable for widespread application in the field

Images