Gravel filter in the application of micro-irrigation project - sand filter

Gravel filter in the application of micro-irrigation project - sand filter

Abstract: The sand filter used in micro-irrigation projects, both to improve the quality of agricultural micro-irrigation, micro-irrigation equipment and guarantee the integrity and good use, reducing crop pests, beneficial to agriculture yield, yield. In the drought year, demonstrated the irrigation irrigated yield. Only to develop irrigation project to ensure sustained and stable development of agricultural production. In recent years, two cities from promoting water-saving micro-irrigation to improve agricultural production conditions and ecological environment to start the development of "two highs and one superior" Agriculture and water-saving agriculture, improve land utilization and cropping index, and through adjusting agricultural planting structure, raise the overall quality and efficiency of agriculture and increase farmers income.

Enhance the collective economic strength, increase revenue, a new leap for the agricultural economy lay the foundation for the promotion of traditional agriculture to modern agriculture, accelerate the pace of agricultural modernization. Sand filters used in micro-irrigation projects, help to improve the efficiency of micro-irrigation projects, to ensure that agricultural yield, yield. 1 filter structure and working principle Gravel filter is used to filter sand and gravel as the media device. Mainly by the tank inlet, outlet, outfall, sand bed and other parts. Accessories are water valve, drain valve, flush valve and pressure gauge, etc., see Figure 1. According to the design flow of micro-irrigation demands first hub, multi-tank parallel can be used in combination, for the steel cylindrical tank. Graded sand bed particle size 1.5 ~ 4.0mm, by the laying of different sizes made of a variety of gravel layer, the upper small particle size, bottom size large. The filtering principle is to contain sediment and other impurities in the water into the tank and entered the sand bed filtration process through the pores of the filter medium between the twists and turns to complete, sediment trapped in the sand bed filter unit, filtering water through sand bed filter unit into the two screen-type filter. Course of their work when the pressure exceeds the maximum allowed pressure drop, it should be manually cleared or backwash. 2 the performance of gravel filter Gravel filter is mainly used for reservoirs, pools, dams, open channels, rivers and other water containing organic matter and sediment in the water filter, especially for algae, floating debris and other debris processing. According to the type of emitter used, the general need to mesh filter or a matching laminated filter used in tandem. Gravel filter the main technical parameters in Table 1. 3 advantages of micro-irrigation gravel filter (1) micro-irrigation for dry crops, the main methods are: water truck from the sand filter tank low pressure connection hose, hose on the hole every 30cm 1 micro-irrigation, water tankers on the move to micro- irrigation. The method of low cost, each cost less than 42,000 yuan.

Easy to use, simple operation, more than border irrigation ditch water-2P3, without drainage pipes and building plot ridge, both to improve land use efficiency, but also saving time and labor, hilly to apply. 1.5 million yuan as investment, purchase of 28 sets of micro-irrigation equipment, micro-irrigation area up to 280 hm2. (2) micro-irrigation for the Vegetables Greenhouse temperature can increase 1 ~ 3 , reduce pests, improve yield and quality of vegetables, is the best water efficient irrigation methods, such as increasing input of promising.

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