工程技术方案内容
一、输水方案和生产工艺流程
1、输水方式
采用二级泵房加压输水。
2、输水主管线路
从净水厂出水总管→沿信安公路→过信安公路大桥→再沿城信大道→（工业园管委会）与现有管网连接。管长11.5km，本项目完成管长1000m，两根管径DN800的输水管，每根管输水5万m3/日。
3）生产工艺流程设计
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加矾|
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一次加氯
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桃江河|
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取水泵房|
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管式混合器|
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网格反应
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平流沉淀|
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气水反冲洗滤池|
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送水泵房 |
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清水池|
城市管网 |
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二次加氯 |
上清水
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沉泥池|
桃江 |
Chapter Four Content of Engineering Scheme
I. schemes of the water transmission and production process
- Water-carrying schemes
Adopt second pumping station for pressurizing and water-carrying schemes process.
2. Main pipeline of water transmission
From discharge main pipeline of water treatment plant →along the Xinan highway →Pass Xinan highway bridge →And then along Chengxin main road →(the management committee of industrial park) and connect with existing pipeline network. The pipe is 11.5km in length. The length of pipeline finished in this project is about 1000m; the diameter of two water transmission pipelines is about DN800; the water transmission capacity of each pipe is about 50,000m3 / day.
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Alum dosing|
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First chlorine dosing
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Tao river|
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Water intake pumping house|
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Tube-type blender|
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Grid reaction
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Advection sedimentation|
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Air-water backwash filter|
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Water-supply station |
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Clean water tank|
City pipe network |
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Second chlorine dosing |
Clean water adding
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Slime pit|
Tao river |
二、取水工程
1、取水头部
工程采用新工艺的虹吸式“悬臂真空罐取水头部”。悬臂真空罐取水拖部由钢筋砼悬臂管架、真空罐、吸水管和岸边片石挡土墙组成。
2、取水泵房
根据计算取水泵房需要安装3台水泵，每台负荷2.5万吨/日，二用一备。
桃江河取水泵房：泵房分为四大间，即配电间12m×5m，变电间6m×4m设在地面以上，自控、值班室6m×4.0m，与配电间一样设在地面以上，核心的取水泵房20m×9.0m，地面以下部分深9.28m。水泵的拟选用规格型号：350S526型三台，每台电机功率132km。
龙井水库取水泵房：泵房分为四大间，即配电间12m×5m，变电间6m×4m设在地面以上，自控、值班室6m×4.0m，与配电间一样设在地面以上，核心的取水泵房20m×9.0m，地面以下部分深6.10m。水泵的拟选用规格型号：500S22三台，每台电机功率185km。
3、浑水管
桃江河总浑水管采用DN1200mm球墨铸管，长175m；DN800mm管长为85m；龙井水库总浑水管采用DN1200mm球墨铸管，长33km，基本沿大桥镇至信丰县城公路路径走向安装。
三、净水厂
1、平面布置
（1）布置原则：
II. Water intake engineering
- Water intake head
Project adopts siphon type new craft for “cantilever vacuum pot water intake head”. The water transmit part of cantilever vacuum pot is consisted by the concrete cantilever pipe carrier of reinforcing bar, vacuum pot, suction duct and block of stones wall of bank side rubble.
2. Water intake pumping house
3 water pumps are required to install in water intake pumping house according to the calculation. The load of each pump is 25,000 ton per days. Two pumps are applied in application and one pump is furnished as stand-by pump.
The water intake pumping house of Taojiang river: The pump house is divided into four major room, i.e. distribution room is about 12m * 5m; power transformation room is about 6m * 4m and located on the ground; automatic control room and duty office is about 6m * 4.0m, which is located on the ground as distribution room. The central water intake pump house is about 20m * 9.0m. The part under the ground is about 9.28ms in depth. The three 350S526 type water pumps are to be adopted and the electrical power of each unit is about 132km.
The Longjing reservoir water intake pump: The pump house is divided into four major room, i.e. distribution room is about 12m * 5m; power transformation room is about 6m * 4m and located on the ground; automatic control room and duty office is about 6m * 4.0m, which is located on the ground as distribution room. The central water intake pump house is about 20m * 9.0m. The part under the ground is about 6.10ms in depth. The three 500S22 type water pumps are to be adopted and the electrical power of each unit is about 185km.
3. Turbid water pipe
The total turbid water pipe of Taojiang River adopts the nodular cast iron tube of DN1200mm, which is 175m in length and 85m in type of DN800mm; the total turbid watepipe of the Longjing reservoir adopts nodular cast iron tube of DN1200mm, which is 33km in length. The pipe is installed along bridge town and towards highway route of Xinfeng County.
III. Water treatment plant
1. Plane layout
- Layout principle:
①满足工艺流程要求，力求流程简短，避免迂回；
②根据现有地形合理布置，节约用地；
③考虑近期相对功能完善，又考虑近远结合；
④功能分区明确，交通顺畅，管理方便；
⑤厂区环境协调优美。
（2）布置方案：
按提供不规则梯形场地布置，东西较短，南北方向稍长，其西面是信丰至安远公路，跨过公路往西20多米就是桃江，南面为山地。
本设计水厂大门设在西北角现有公路东侧。入厂的主道路宽6米，设环行车道一圈，围墙以内为10万吨/日水厂用地，共约53330m2。
水厂主要分为三个功能区：第一功能区为生产和辅助生产区：主生产含环行车道内及厂区主道路以西的反应、沉淀池、滤池及清水池、送水泵房，辅助生产含家药间、机修、校表和仓库。第二功能区为污泥处理区：含污泥池和污泥干化场，位于厂区西南山坡地上。第三功能区为办公区：含综合楼、门卫、车棚和停车场，位于大门边的一侧，厂区西北角。详细布置方案见“信丰县第二水厂平面布置图”。
2、高程布置
（1）布置原则
①充分利用地形，尽量减少土方工程量：并保持场内石方挖填平衡；
②满足工艺流程的净水和排水高差要求；
③满足场地雨水排放，洪水期厂区不被淹没；
1). Meet the requirements of technological process, aiming at formulating a brief procedure, and avoid indirection arrangements;
2).Rational arranged according to the existing topography; economize the planning area;
3).Considers the perfection of relative functions recently; and combines with the future consideration as well;
4).Clearly divides the area of function; smooth transportation; and convenient management;
5) The factory environment is coordinated gracefully.
- Scheme assignment:
According to the irregular ladder-shaped place, the scheme assignment is relatively short in east and west direction and slightly longer in north and south direction; stretch from Xinfeng County to highway of Anyuan in the west; across the highway it is Taojiang in the west less than 20 meters; in the south is the mountain area.
In this design the water plant gate is located in the east of the existing highway of northwest corner. The main road entering into the factory is about 6 meters in width; has a circle lane; the planning land for 100,000 ton per days of factory is enclosed with wall and there are altogether 53330m2.
The water plant is divided into three function districts: The first function district is the production and production auxiliary area: The production area mainly includes reaction pool, sediment pool, filter pool, clear pool and water supply pump house, inside the circle lane and west to the main road of factory; the auxiliary area includes chemical room, mechanical repairing room, meter calibration room and warehouse. The second function district is the sludge disposal area: includes the sludge pool and sludge drying bed, which located in the southwest hillside of the factory. The third function district is the office area: Includes complex building, entrance guard, car shed and parking area, which located on one side of the gate in northwest corner of the factory. Detail scheme assignment see “layout plan of the second water plant of Xinfeng County”.
2. Elevation arrangement
(1) Assignment principle
1).Fully utilizes topography; do the best to reduce the earthwork volume: and maintain the balance of the stonework digging and filling on site;
2).Meet the requirements of water purification and elevation of water drainage of technological process;
3). Meet the requirements of rainwater discharge on work site; factory shall not be flooded in flood period;