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| DOI：10.13522/j.cnki.ggps.2021335 |
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| Optimizing Operating Condition of the Filters in Micro-irrigation Pump |
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TAO Hongfei, SHEN Pingping, ZHOU Yang, WU Zijing, LI Qiao
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1. College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China;
2. Xinjiang Key Laboratory of Hydraulic Engineering Security and Water Disasters Prevention, Urumqi 830052, China
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| Abstract: |
| 【Objective】A porous filter is often used in micro-irrigation systems to filter debris and sand particles. Its performance depends on many factors. The purpose of this paper is to present a method to optimize its operating conditions. 【Method】The studies were based on a micro-pressure filter. We took water pressure loss, sand interception rate and filtration efficiency as assessment criteria. In the experiments we measured and calculated the combined impact of inlet flow, sediment content, water-separator type, and filter area on operation of the filter. The results were processed using the analysis of range and variance. 【Result】The factors that affected the head loss of muddy water across the filter were ranked in the descending order of inlet flow > sediment content > filter area > water separator type. The factors that impacted the mass of sand trapped by the filter were ranked in the descending order of sediment content > filter area > water separator type > inlet flow rate. The factors that affected the total filtration efficiency were ranked in the descending order of filter area > sediment content > water separator type>inlet flow rate. 【Conclusion】The two factors that affected water head loss across the filter, sediment filtration and total filtration efficiency most are sediment content and filter area. Comprehensive analysis shows that the optimal operating conditions for the filter are sediment concentration 0.36 kg/m3, inflow rate 4 m3/h, water separator type Type 3, filter area 2 060 cm2. |
| Key words: filter; micro-irrigation; orthogonal design; analysis of variance |
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