Category:water

Question:
when out of water from the Yangtze River, in what kind of water going through the process to the final domestic use.
urgent! Re-lines, and professional answers.

Answer:
first production process - reaction, the process including “raw water - → mixing trough - → Grid reaction tank.” Raw water refers to the production of raw water for tap water. Usually carries the raw water such as algae, humus, sand-like particles slightly, when tap water production process is the first vote in raw water by adding “purifying” - Basic aluminum chloride (commonly known as alum), Basic aluminum chloride in the raw water can produce a positive charge, so that a small water particles formed by the electrostatic interaction of particles larger groups in order to easily precipitate. The “pre-chlorination” can choose whether or not the situation according to the original water dosing, and its role mainly: ① coagulant is mainly humus and colloidal water oxidation, so that it can produce coagulation and sedimentation; ② algae-killing agent, based on the original the number of algae in water content in deciding whether to vote plus (high levels of algae in water can produce odor) in order to kill algae. “Former Canadian mud” is too much algae in the water, an increase in water absorption capacity, so that can play a more effective role in purifying agent. “Former Canadian base” is the PH value of raw water is too low, the impact effect of coagulation and sedimentation of water bodies, so they will vote for lime and other bases, increasing sedimentation effect of water and make treated water maintained at neutral PH value. Raw water in the purifying agent and many other pharmaceutical dosing, after that, through the mixing tank and mesh reactor, so that a small water particles have enough time to form larger particle clusters.

second production processes - precipitation, the process including “grid reactor - → inclined tube sedimentation tanks.” At this time, the original water from the reactor into the grid inclined tube sedimentation tank, larger particles in the water through the sedimentation tank regiment of the ramp board, will be attached, and precipitated to the bottom of ramp, after this treatment, the water quality is almost clear as a mirror. And settle down in the mud on a regular basis to drain away through the mud truck, sedimentation tanks to keep clean.

The third production processes - filtration, the process including “Sedimentation tank - → air-water backwashing filter - → clean water tank.” Murmur along the inclined tube sedimentation tank a clean set of the above together into the filter tank, the water was fine impurities in the filter sand filter filtration and adsorption later (when the filter impurities in the fine sand accumulated to a certain extent, the filter should on a regular basis 〃 〃 clean air-water backwashing in order to maintain a good filtering effect), clean the filter to clarify the post-flow of water along the pipe to the clean water tank for storage and re-investment in clean water by adding chlorine for a period of time to disinfect the water body bacteria, E. coli bacteria to kill, the entire water treatment process of this have been completed.

fourth working procedure - pressurized water, the process including “clean water tank - → 2 Pumping Station - → water supply pipe network.” Sterile tap water stored in clean water after the pool, through the water pump pressure after the two pumping stations, clean water along the water supply pipe, into millions of households.

Chinese:水从水源出来到生活用水的过程

类别: 供水

问题:
当水从长江抽出来，在水厂经历一些什么过程到{zh1}的生活用水。
急！再线等专业答案。

回答:
{dy}道生产工序－－反应，其过程包括“原水－－→混合槽－－→网格反应池”。原水是指未经加工的自来水生产用水。通常原水中都带有诸如藻类、腐殖质、泥沙之类的轻微颗粒，这时自来水生产的{dy}道工序就是在原水中投加“净水剂”——碱式氯化铝（俗称为矾），碱式氯化铝在原水中可产生正电荷，令水中的轻微颗粒受静电作用而形成较大的颗粒团，以易于沉淀。而“前加氯”则可根据原水情况选择是否投加，其作用主要有：①助凝剂，主要是氧化水中的腐殖质和胶体，使之能产生混凝沉淀；②杀藻剂，根据原水中的藻类含量多少而决定是否投加（水中藻类的含量过高可产生异味），以杀灭藻类。“前加泥”是水中藻类过多时，增加水中的吸附能力，使净水剂能起到更有效作用。“前加碱”是原水PH值过低时，影响水体的混凝沉淀效果，故要投加石灰等碱类，增加水的沉淀效果，并使其出厂水PH值保持在中性。原水在投加净水剂等多项药剂之后，再经过混合槽和网格反应池，这样水中的轻微颗粒就有足够的时间形成较大的颗粒团。

第二道生产工序－－沉淀，其过程包括“网格反应池－－→斜管沉淀池”。这时，原水从网格反应池流入斜管沉淀池，在水中较大的颗粒团在通过沉淀池的斜板时，就会附着并沉淀到斜板的底层，经此处理后的水质变得近乎清澈如镜。而沉淀下来的污泥定期经排泥车排走，保持沉淀池的洁净。

第三道生产工序－－过滤，其过程包括“斜管沉淀池－－→气水反冲洗滤池－－→清水池”。潺潺清流顺着斜管沉淀池上面的集水槽汇集流入滤池，水中的细微杂质被滤池中的滤沙过滤和吸附之后（当滤沙中的细微杂质累积到一定程度后，滤池也要定期进行〃气水反冲洗〃清洗，以保持良好过滤效果），洁净澄清的滤后水沿着管道流往清水池进行贮存，并在清水中再次投加入液氯进行一段时间xx，对水体的xx、大肠杆菌等病菌进行杀灭，整个净水处理过程到此就已完成。

第四道工序－－加压供水，其过程包括“清水池－－→二级泵房－－→供水管网”。经xx后的自来水贮存在清水池中，通过水厂二级泵房的水泵加压之后，洁净的自来水沿着供水管道，流入千家万户。