过滤器是滴灌的重要设备。水质过滤的好坏是滴灌成败的关键。据调查,我区吐鲁番县兴建的几个滴灌试点工程中,大部份都因水质过滤不好,造成滴头堵塞而先后报废。滴灌过滤器的形式多种多样,我国目前多采用立式(或卧式)网筛过滤器,筛网一般用80～120目尼龙丝布,相应网眼孔径为0.177～0.125毫米。我们知道,细砂分级粒径为0.10～0.25毫米,极细砂为0.05～0.10毫米,这样,采用80～120目的网筛 The filter is an important device for drip irrigation. The quality of water filtration is the key to the success or failure of drip irrigation. According to the survey, most of the pilot projects of drip irrigation constructed in Turpan County of our district have been scrapped due to poor water quality filtration, causing the drippers to become clogged. Drip filter in a variety of forms, our country now use more vertical (or horizontal) mesh filter, the screen generally 80 ~ 120 mesh nylon cloth, the corresponding mesh aperture of 0.177 ~ 0.125 mm. We know that fine grading particle size of 0.10 to 0.25 mm, very fine sand 0.05 to 0.10 mm, so that the use of 80 to 120 mesh screen