Research on high-pressure water jet technology for sediment dredging of sewage pipeline in old urban area
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摘要:
以我国南方某县城区实际污水管道为研究对象,测定城区中居民小区与菜市场区域污水管道内沉积现状及沉积物的性质,通过各种清淤方法的对比,选择高压水射流法进行清淤工作,使用新型充气式污水管道封堵装置、清洗-吸泥一体化车辆以及KEG帝王喷头,进行喷头出口压力与喷头移动速度的正交试验,对比清淤效果、油耗、水耗、清淤时间及总成本,筛选高效低成本最佳清淤参数。结果表明:居民小区污水管道淤积程度为50%左右,菜市场污水管道淤积程度为40%~50%,居民小区管道内淤泥的流动性比菜市场好,选用较低喷头出口压力能满足清淤工作;适用于居民小区污水管道的最佳清淤参数为喷头出口压力9 MPa和喷头移动速度0.3 m/s,适用于菜市场污水管道的最佳清淤参数为喷头出口压力12 MPa和喷头移动速度0.3 m/s。
Abstract:Taking the actual sewage pipeline in the urban area of a county in southern China as the research object, the sedimentation status and sediment properties of sewage pipelines in the residential quarter and vegetable market in the urban area were determined. By comparing various dredging methods, the high-pressure water jet method was selected for silting removal. The new inflatable sewage pipe plugging device, washing-suction integrated vehicle and KEG Emperor spray head were used. The orthogonal test of nozzle outlet pressure and nozzle moving speed was carried out to compare the silting effect, oil consumption, water consumption, silting time and total cost, and the best silting parameters with high efficiency and low cost were selected. The results showed that the degree of sewage pipeline silting in the residential quarter was about 50%, and that in the vegetable market was about 40%-50%. The fluidity of sludge in pipelines of the residential quarter was better than that of the vegetable market. Lower pressure at the nozzle outlet could satisfy sludge cleaning. The optimum dredging parameters for sewage pipes in the residential quarter were spray head outlet pressure 9 MPa and spray head movement speed 0.3 m/s, and the optimum dredging parameters for sewage pipes in the vegetable market were spray head outlet pressure 12 MPa and spray head movement speed 0.3 m/s.
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表 1 管道内沉积物基本性质
Table 1. Basic properties of sediments in pipelines
管道区域 含水率/% 粒径分布/% MLVSS/
(mg/L)MLSS/
(mg/L)密度/
(g/cm3)黏度/
(Pa·s)含油量/
(g/kg)<60目 60~
100目100~
150目150~
300目>300目 居民小区 72.01~
78.830.86~
1.0443.84~
4.1674.88~
81.1215.36~
16.640.96~
1.04157.44~
170.56208.32~
225.682.37~
2.5911.856~
13.1042.19~
2.37菜市场 76.47~
84.530.95~
1.054.75~
5.2571.25~
78.7516.15~
17.851.90~
2.10130.56~
141.44170.88~
185.122.10~
2.3014.345~
15.8554.42~
4.77表 2 居民小区管道试验清淤效果
Table 2. Effect of pipeline orthogonal experiments on silt removal in residential quarter
组别 喷头出口
压力/MPa移动速度/
(m/s)清淤效果/% 1次 2次 3次 4次 方案1 12 0.1 83.3 100 方案2 12 0.3 72.2 100 方案3 12 0.6 44.5 60.0 75.0 100.0 方案4 10 0.1 71.4 100.0 方案5 10 0.3 60.0 100 方案6 10 0.6 37.2 54.5 60.0 100 方案7 9 0.1 63.0 100 方案8 9 0.3 57.0 100 方案9 9 0.6 34.3 47.8 50.0 100 表 3 菜市场管道试验清淤效果
Table 3. Effect of pipeline orthogonal experiments on silt removal in vegetable market
组别 喷头出口
压力/MPa移动速度/
(m/s)清淤效果/% 1次 2次 3次 4次 5次 6次 方案1 12 0.1 43.7 55.5 100 方案2 12 0.3 31.3 47.7 60.9 100 方案3 12 0.6 6.3 6.7 8.9 13.7 13.6 15.8 方案4 10 0.1 25.0 29.2 52.9 100 方案5 10 0.3 15.6 20.4 25.6 37.5 70.0 100 方案6 10 0.6 4.7 4.9 10.3 11.5 13.1 15.0 方案7 9 0.1 15.6 18.5 27.3 37.5 65.0 100 方案8 9 0.3 6.3 6.7 10.7 12.0 15.9 19.0 方案9 9 0.6 3.1 3.2 6.7 8.7 9.8 13.0 表 4 居民小区管道清淤试验全过程时间成本及总成本
Table 4. Time cost and total cost of pipeline desilting experiment in residential quarter
组别 时间/min 成本/(元/m) 现场勘探及毒气检测 QV内窥检测 封堵和抽水 冲洗和吸泥 拆堵 转运 总计 冲洗和吸泥段 总计 方案1 15 5 40 17.33 10 5 92.33 3.96 69.94 方案2 15 5 40 8.44 10 5 83.44 2.75 66.47 方案3 15 5 40 12.44 10 5 87.44 2.28 67.08 方案4 15 5 40 17.33 10 5 92.33 3.90 69.53 方案5 15 5 40 8.44 10 5 83.44 2.73 66.31 方案6 15 5 40 12.44 10 5 87.44 2.27 67.02 方案7 15 5 40 17.33 10 5 92.33 3.83 69.13 方案8 15 5 40 8.44 10 5 83.44 2.71 66.21 方案9 15 5 40 12.44 10 5 87.44 2.25 66.94 表 5 菜市场管道清淤试验全过程时间及总成本
Table 5. Time cost and total cost of pipeline desilting experiment in vegetable market
组别 时间/min 成本/(元/m) 现场勘探及毒气检测 QV内窥检测 封堵和抽水 冲洗和吸泥 拆堵 转运 总计 冲洗和吸泥段 总计 方案1 15 5 40 26.00 10 5 101.00 5.44 72.53 方案2 15 5 40 16.89 10 5 91.89 2.81 68.74 方案3 15 5 40 >18.67 10 5 >93.67 >2.49 >56.69 方案4 15 5 40 34.67 10 5 109.67 6.01 74.20 方案5 15 5 40 25.33 10 5 100.33 3.57 70.57 方案6 15 5 40 >18.67 10 5 >93.67 >2.42 >55.62 方案7 15 5 40 52.00 10 5 127.00 7.33 77.74 方案8 15 5 40 >25.33 10 5 >100.33 >3.27 >57.47 方案9 15 5 40 >18.67 10 5 >93.67 >2.10 >56.30 -
[1] 高原, 王红武, 张善发, 等.合流制排水管道沉积物及其模型研究进展[J]. 中国给水排水,2010,26(2):15-18. doi: 10.19853/j.zgjsps.1000-4602.2010.02.004GAO Y, WANG H W, ZHANG S F, et al. Current research progress in combined sewer sediments and their models[J]. China Water & Wastewater,2010,26(2):15-18. doi: 10.19853/j.zgjsps.1000-4602.2010.02.004 [2] CHEBBO G, LAPLACE D, BACHOC A, et al. Technical solutions envisaged in managing solids in combined sewer networks[J]. Water Science and Technology,1996,33(9):237-244. doi: 10.2166/wst.1996.0220 [3] 李海燕, 梅慧瑞, 徐波平.北京城市雨水管道中沉积物的状况调查与分析[J]. 中国给水排水,2011,27(6):36-39. doi: 10.19853/j.zgjsps.1000-4602.2011.06.011LI H Y, MEI H R, XU B P. Investigation and analysis of storm sewer sediments in Beijing[J]. China Water & Wastewater,2011,27(6):36-39. doi: 10.19853/j.zgjsps.1000-4602.2011.06.011 [4] 张伟, 余健, 李葳, 等.广州市排水管道沉积现状研究分析[J]. 给水排水,2012,48(7):147-150. doi: 10.3969/j.issn.1002-8471.2012.07.035 [5] 徐祖信, 张竞艺, 徐晋, 等.城市排水系统提质增效关键技术研究: 以马鞍山市为例[J]. 环境工程技术学报,2022,12(2):348-355. doi: 10.12153/j.issn.1674-991X.20210842XU Z X, ZHANG J Y, XU J, et al. Study on key technologies for improving quality and efficiency of urban drainage system: a case of Ma'anshan City[J]. Journal of Environmental Engineering Technology,2022,12(2):348-355. doi: 10.12153/j.issn.1674-991X.20210842 [6] 孙菲, 高书连, 袁鹏, 等.青岛市李村河黑臭水体整治案例分析[J]. 环境工程技术学报,2020,10(5):740-745. doi: 10.12153/j.issn.1674-991X.20200110SUN F, GAO S L, YUAN P, et al. Case analysis on the treatment of black and odorous water body in Licun River, Qingdao City[J]. Journal of Environmental Engineering Technology,2020,10(5):740-745. doi: 10.12153/j.issn.1674-991X.20200110 [7] 高丹英, 杨娇艳, 王文玲, 等.黑臭水净化菌株的筛选及其水质改善能力[J]. 环境科学研究,2010,23(3):350-354. doi: 10.13198/j.res.2010.03.104.gaody.014GAO D Y, YANG J Y, WANG W L, et al. Screening of microorganisms for treatment of black and odorous water and study on their water quality improvement ability[J]. Research of Environmental Sciences,2010,23(3):350-354. doi: 10.13198/j.res.2010.03.104.gaody.014 [8] 刘丽香, 韩永伟, 刘辉, 等.曝气技术对黑臭水体治理效果影响的研究进展[J]. 环境科学研究,2020,33(4):932-939. doi: 10.13198/j.issn.1001-6929.2020.01.02LIU L X, HAN Y W, LIU H, et al. Research progress on the effect of aeration on urban black-odor water ecosystem[J]. Research of Environmental Sciences,2020,33(4):932-939. doi: 10.13198/j.issn.1001-6929.2020.01.02 [9] 汤霞, 陈卫兵, 李怀正.城市排水系统沉积物特性及清淤方式研究进展[J]. 城市道桥与防洪,2013(3):106-110. doi: 10.3969/j.issn.1009-7716.2013.03.031TANG X, CHEN W B, LI H Z. Study on characteristics of sediments in urban sewer system and its desilting mode[J]. Urban Roads Bridges & Flood Control,2013(3):106-110. doi: 10.3969/j.issn.1009-7716.2013.03.031 [10] ASHLEY R M, CRABTREE R W. Sediment origins, deposition and build-up in combined sewer systems[J]. Water Science and Technology,1992,25(8):1-12. doi: 10.2166/wst.1992.0173 [11] 黄乃先, 齐一凡, 金伟.排水管道沉积物控制的研究进展[J]. 环境工程技术学报,2021,11(3):507-513. doi: 10.12153/j.issn.1674-991X.20210017HUANG N X, QI Y F, JIN W. Research progress on the control of sediments in the drainage pipe[J]. Journal of Environmental Engineering Technology,2021,11(3):507-513. doi: 10.12153/j.issn.1674-991X.20210017 [12] GRABOWSKI R C, DROPPO I G, WHARTON G. Erodibility of cohesive sediment: the importance of sediment properties[J]. Earth-Science Reviews,2011,105(3/4):101-120. [13] GHANI A A. Sediment transport in sewers[D]. Newcastle: Newcastle University, 1993. [14] BERTRAND-KRAJEWSKI J L, BARDIN J P, GIBELLO C. Long term monitoring of sewer sediment accumulation and flushing experiments in a man-entry sewer[J]. Water Science & Technology,2006,54(6/7):109-117. [15] SHAHSAVARI G, ARNAUD-FASSETTA G, CAMPISANO A. A field experiment to evaluate the cleaning performance of sewer flushing on non-uniform sediment deposits[J]. Water Research,2017,118:59-69. doi: 10.1016/j.watres.2017.04.026 [16] 刘翠云, 张效华, 杨钰婷, 等.雨水管道沉积物冲刷特性[J]. 安全与环境学报,2019,19(2):635-642. doi: 10.13637/j.issn.1009-6094.2019.02.040LIU C Y, ZHANG X H, YANG Y T, et al. Analysis of scouring features of sedimental left-over elements in rainwater pipes[J]. Journal of Safety and Environment,2019,19(2):635-642. doi: 10.13637/j.issn.1009-6094.2019.02.040 [17] 唐磊, 车伍, 赵杨, 等.合流制溢流初期冲刷及其控制策略研究[J]. 给水排水,2014,50(5):24-30. doi: 10.3969/j.issn.1002-8471.2014.05.007 [18] 李茂英, 李海燕.城市排水管道中沉积物及其污染研究进展[J]. 给水排水,2008,44(增刊1):88-92. doi: 10.3969/j.issn.1002-8471.2008.z2.024 [19] 刘志长. 合流制排水管道沉积物的沉积状况及控制技术研究[D]. 长沙: 湖南大学, 2011. [20] 杨云安. 合流制排水系统管道沉积物控制技术研究[D]. 北京: 清华大学, 2011. [21] 董梅, 胡晔, 杨洋, 等.关于排水管道沉积物控制及水力清淤的思路[J]. 市政技术,2018,36(6):113-115. doi: 10.3969/j.issn.1009-7767.2018.06.037DONG M, HU Y, YANG Y, et al. Concept of sediment control and hydraulic dredging of drainage pipeline[J]. Municipal Engineering Technology,2018,36(6):113-115. doi: 10.3969/j.issn.1009-7767.2018.06.037 [22] 徐迪, 阮怡洁.略论城市排水管道中沉积物及控制对策[J]. 科学技术创新,2018(18):105-106. [23] 翟亮.城镇排水管道的养护技术[J]. 西南给排水,2013(4):74-80. [24] 边艳玲, 董巍.排水管道中的清淤方法[J]. 黑龙江水利科技,2003,31(3):95. doi: 10.3969/j.issn.1007-7596.2003.03.074 [25] 孙勇, 杨向东, 孙建宇, 等.排水管道清淤方法及开发新设备的构想[J]. 给水排水,1996,22(8):52-54. doi: 10.13789/j.cnki.wwe1964.1996.08.015SUN Y, YANG XD, SUN J Y, et al. Recent status and new ideas on equipment development of sewer dredging technology[J]. Water & Wastewater Engineering,1996,22(8):52-54. doi: 10.13789/j.cnki.wwe1964.1996.08.015 [26] APHA. Standard methods for the examination of water & wastewater[S]. Washington DC: American Public Health Association, 2005. [27] 李伟, 文向峰, 熊习旺, 等. 充气式污水管道封堵装置: CN213982495U[P]. 2021-08-17.