Precautions for using the fertilizer tank in an intelligent water and fertilizer integrated device
Author:
Release time:
2020-05-11
Precautions for using the fertilizer tank of the intelligent water and fertilizer integrated equipment are as follows:
①When the tank is small (less than 100L), dissolve the solid fertilizer completely before pouring it into the fertilizer tank, otherwise it may clog the tank, especially when the pressure is low.
②Some fertilizers may contain some impurities. Before pouring them into the fertilizer tank, dissolve and filter them with a 100-200 mesh filter screen. If solid fertilizer is added directly, a 1/2" sieve filter must be installed at the outlet of the fertilizer tank in the water and fertilizer integrated project. Or install the fertilizer tank before the filter in the main pipeline.
③After each fertilization, the pipeline should be flushed with irrigation water to remove the remaining fertilizer solution in the pipeline. Generally, it takes 20-30 minutes for drip irrigation systems, 10-15 minutes for micro-sprinkler irrigation, and no requirements for sprinkler irrigation systems. If some drip irrigation systems have many rotational irrigation areas, and fertilization is required to be completed in the shortest possible time, the change in the conductivity at the dripper can be measured to determine the cleaning time. Generally, the larger the irrigation area at the head, the longer the water supply pipeline, and the longer the cleaning time. Flushing is a necessary process. Because the remaining fertilizer solution remains in the pipeline and drippers, it is easy to breed algae, moss and other lower plants, clogging the drippers; when the hardness of irrigation water is high, the remaining fertilizer solution forms precipitation at the drippers, causing blockage. Timely flushing can basically prevent blockage. According to the author's investigation, most of the clogging of drippers after irrigation fertilization is related to the failure to flush them in time after fertilization.
④The pressure difference required for the fertilizer tank is obtained from the regulating valve between the inlet and outlet. Because the irrigation time is usually longer than the fertilization time, the shut-off valve should be fully open when not fertilizing. Frequent adjustment of the valve may lead to inconsistent pressure differences each time fertilization (especially when the pressure gauge range is too large, it is difficult to judge), thus making it difficult to accurately grasp the fertilization time.
In order to obtain a constant pressure difference, the shut-off valve can be replaced by a flow meter (water meter). The flow of water through the water meter will cause a small pressure difference, which can be used for the fertilizer tank. When not fertilizing, close the small pipes at both ends of the fertilizer tank, and the pressure difference on the main pipe still exists. In this case, the pressure on the main pipe is balanced whether fertilization is carried out or not.
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