皇冠足球比分

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PE管道输水灌溉中的淤堵原因与防控措施

作者: 浙江水利水电学院 何文学 岳文俊 段永刚 王茜 编辑: 来源: 《中国水利》 发布日期: 2019.05.23
信息摘要:
管道输水灌溉工程由水泵加压或自然落差形成有压水流,通过hde灌溉管道输送到田间给水装置,并采用地面灌溉,具有节水、节地、省劳、増产、管理方便…

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YI、YUDUYUANYIN 

1.WULIYUDU

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皇冠足球比分 2.HUAXUEYUDU 

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3.SHENGWUYUDU

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ER、YUDUFANGKONGCUOSHI

CONGQIANSHUYUANYINFENXIKEZHI,NONGTIANGUANGAISHUIYUANZHONGCANCUNDEXUANFUKELIWU、SHUITIPHZHI、HANYANLIANG、WEISHENGWUZHONGLEIYUSHULIANG、HUAXUECHENDIANWUZHONGLEIYUSHULIANG、YOUJIZHIHANLIANG、DANLINYINGYANGWUHANLIANGDENG,SHIGUANDAOCHUXIANYUDUXIANXIANGDENEIYIN。GUANDAO JIEGOUXINGSHIDERENHEBIANHUA,DOUKENENGDAOZHILIUCHANGLIUSUFENBUZHUANGKUANGDEBIANHUA,CHUXIANJUBUDILIUSU、JINGSHUIQUZAISUONANMIAN,ERGUANGAIGUANWANGDEJIANXIEXINGYUNXING,YOUQISHIGUANSHUIZHOUQI、GUANSHUIPINLV、GONGZUOYALI、GONGZUOFANWEIHUOQUYUDENGYINSU,YEHUIYINQIGUANWANGXITONGGONGZUOZHUANGTAIDEGAIBIAN,ZHEIXIEDOUSHIDAOZHIhdpeGUANDAOYUDUXIANXIANGFASHENGDEWAIYIN。 RENQINGYINQIPENONGTIANGUANGAIGUANDAOYUDUDEYUANYIN,JIUNENGGOUYOUZHENDUIXINGDICAIQUXIANGYINGDEJISHUCUOSHI,QIFANGKONGCUOSHIFENSHURUXIA。 

1.KONGZHIGUANGAISHUIYUANSHUIZHUODU

NONGTIANGUANGAISHUIZHIBIXUFUHE《NONGTIANGUANGAISHUIZHIBIAOZHUN》(GB 5084-2005)。 GAIBIAOZHUNSHEDINGDEKONGZHIXIANGMUGONGJI27XIANG, QIZHONGNONGTIANGUANGAIYONGSHUISHUIZHIJIBENKONGZHIXIANGMU16XIANG,XUANZEXINGKONGZHIXIANGMU11XIANG。 ZHEIXIEJIBENDELIHUAJIANCEZHIBIAOZHUYAOSHIWEILEFANGZHITU RANG、DI XIA SHUI HE NONG CHAN PIN WU RAN,BAOZHENGNONGCHANPINPINZHIHEBAOZHANGRENTIJIANKANG,YUNONGTIANGUANGAI GUANDAOFANGKONGYUDUGUANXIBINGBUDA。 《WEIGUANGONG CHENGSHEJIGUIFAN》DUISHUIYUANZHONGXUANFUGUTIWU、YINGDU、BURONGGUTI、pHZHIYIJIFe、Mn HEH2SHANLIANGDEYUZHITICHULEGUIDING, QIEGUIDINGJINRUWEIGUANGUANWANGDESHUIBUYINGYOUDALIJINGNI SHA、ZACAO、YULUAN、ZAOLEIDENGWUZHI”,ZHUYAOSHIWEILEFANGZHIGUANSHUIQIDUSAI,ZHIYUSHUSHUIGUANWANG DEYUDUWENTI,BINGWEIJIYUTEBIEGUANZHU。《GUANDAOSHUSHUIGUANGAIGONGCHENGJISHUGUIFAN 》(GB/T 20203-2017)ZHISHICONGGUANWANGSHEJIDEJIAODUCHUFA,DUIFANGKONGGUANGAISHUIZHONGDEXUANYIZHINISHATICHULEBUYUYUNXULIUSUKONGZHITIAOJIAN,DANPENONGTIANGUANGAIGUANWANGDEYUNXINGBINGFEIZHIYOUSHEJIGONGKUANG,GUANDAOZHONGDELIUSUBIANHUAYEJIAODA,QIEGUANGAISHUIYUANDESHUIZHICHULEXUANYIZHINISHAZHIWAI,HAIYOUQITAWEISHENGWU、YOUJIXUANFUWUDENGCUNZAI。 ANZHAO《NONGTIANGUANGAISHUIZHIBIAOZHUN》(GB 5084-2005)KONGZHINONGTIANGUANGAISHUIZHI,ANZHAO《GUANDAOSHUSHUIGUANGAIGONGCHENGJISHUGUIFAN》(GB/T 20203-2017)KONGZHIGUANWANGLIUSUDAYUBUYUYUNXULIUSU,BINGFEINENGYOUXIAOFANGKONGGUANWANGSHUSHUIGUOCHENGZHONGDEYUDU,YINGKONGZHIGUANGAISHUIYUANSHUIDEZHUODU,YIZUIDAXIANDUJIANGDIGUANWANGYUDUFENGXIAN。

皇冠足球比分 2.GOUZHUDUOJICHENDIANGUOLVXITONG

从管道输水灌溉工程长期正常稳定运行的角度考量,有必要构筑多级沉淀过滤系统,以尽可能减少灌溉水中含有的颗粒悬浮 物、微生物、藻类 、水草等 ,降低水源与浊度,降低管壁结垢风险或减缓灌溉管道内壁生长环的生长速度。尽管有相关研究提出可采用磁化技术对灌溉水 进行前处理,或添加化学制剂、生物菌剂等对灌溉水进行后处理,以减轻淤堵问题,但水处理成本相对较高 ,某些杀藻剂 、杀菌剂(水霉 菌)、管道清洁剂(一般是酸性化学物质)等会对农作物生长带来不利影响,实际工作中也很少应用。 换言之,农田灌溉水不可能也没有必要像自来水一样进行预处理,其处理成本也是灌溉工程不可能承受的,只能采取造价相对低廉的沉淀过滤系统 。初步设想的多级沉淀过滤系统应由以下三部分组成:
①拦污栅。在水源取水口设置多级多规格拦污栅,以拦截河流底部较大粒径的推移质泥沙以及枯枝败叶、水草等水面漂浮物,实现水源的初级清洁。
②沉淀池。 根据悬移质泥沙的粒 径与水源水质特点,在拦污栅后设置沉淀池。沉淀池应根据当地地形情况、地质条件、来水水质状况等,通过多方案比较,确定其结构型式。沉沙池应具有排沙、冲沙功能,以去除池底沉积的泥沙等杂物。沉沙池应尽可 能具备较大的容积,以兼具澄清、絮凝作用。在地表水环境状况普遍较差的现实条件下, 根据需要与可能,设计必要的辅助性水环境改善措施,如设置适量的生物浮床,养殖适量的食藻食草生物等,以达到在沉淀池改善 水质之目的。
③砂石过滤系统。 农业生产或农产品品质对灌溉水水质要求更高时, 可考虑设置砂石过滤系统,以进一步 提高灌溉水质量,实现水源水的精细过滤。对于采用水肥一体化的项目,更要注意评估管道输送过程中灌溉水质对管网输水能力的不良影响,以保证HDPE灌溉管道长期高效运行。

3.SHEJISHANGYOUXIANBAOZHENGGUANWANGLIUSUDADAOYUNXULIUSU

皇冠足球比分 GUANDAODEYUNXULIUSUSHIGUANGAISHUSHUIGUANWANGYUNXINGGUOCHENGZHONGCHUXIANDEJISHUSHANGKEKAO、JINGJISHANGHELIDELIUSU,QIZHIYINGDAYULINJIEBUYULIUSU,QIEBUZHIYINQIGUODADESHUIJIYAQIANG SHENGGAOZHI。CONGGONGCHENGSHEJIYUYUNXINGGUANLIDEJIAODUKAOLV,DANGGUANDAOLIUSUMANZUYIXIAJIFANGMIANYAOQIUSHI,KEYIRENWEIDADAOLEYUNXULIUSUYAOQIU。①ZAISHEJILIULIANGXIA,PEGUANNEIZUIXIAOLIUSUBUYIDIYU0.3m/s;DANGPEISHUIGUANWANGJIANYOUSHIFEIHUOSHIYAORENWUSHI,GUANNEIZUIXIAOLIUSUBUYIDIYU0.6m/s。②ZIYAGUANDAOSHUSHUIGUANGAIXITONGSHEJILIUSUBUYIDAYU2.5 m/s;JIYAGUANDAOSHUSHUIGUANGAIXITONGSHEJILIUSUBUYIDAYU2.0m/s。③CAIYONGDUONISHASHUIYUANSHI,GUANDAOSHUSHUIGUANGAIXITONGDESHEJILIUSUYINGDAYUGUANDAOLINJIEBUYULIUSU。CONGJIANGDINIANYUNXINGFEIYUFANGZHIPEGUANDAOSHUIJIYINGXIANGDEJIAODUKAOLV,YAOQIUDEDUANMIANPINGJUNLIUSUDOUBUKENENGHENDA。ERGUANZHUGUANDAOYUDUWENTI,ZEGENGYINGGAIGUANZHUBUYUYUNXULIUSU。BUYUYUNXULIUSUZHIDEXUANZE,JIYINGXIANGSHUSHUIGUANWANGDEZHENGCHANGWENDINGYUNXING,YEZHIJIEYINGXIANGGUANWANGGONGCHENGDENIANYUNXINGFEI。XUANZEDEBUYULINJIELIUSUZHIPIANDA,WUXINGZHONGHUIZENGDAGONGSHUISHUIBENGDESHEJIYANGCHENG,DAOZHIGONGCHENGTOUZICHENGBENYUNIANYUNXINGFEIZENGJIA。XUANZEDELINJIEBUYULIUSUZHIPIANXIAO,YOUJIYIYINQIGUANDAOJIEGOUHUOXUANYIZHINISHACHENJI。《GUANDAOSHUSHUIGUANGAIGONGCHENGJISHUGUIFAN》(GB/T 20203-2017)FULUZHONGTUIJIANLEDUONISHASHUIYUANGUANDAOSHUSHUILINJIEBUYULIUSUDEJISUANGONGSHI,DUIYUGUANGAISHUIZHONGHANYOUDEYOUJIXUANFUWU、ZAOLEI、WEISHENGWUDENGQINGKUANG, ZEQUESHAOXIANGYINGDEBUYUPANDUANBIAOZHUNHUOXIANGYINGDEZUIXIAOLIUSUYUZHI。

4.JIAQIANGGONGCHENGYUNXINGWEIHUYUGUANLI

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SAN、JIELUNHEJIANYI

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