污水厂高密度沉淀池

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,高密度沉淀池工艺设计参数计算表,,,,,,,,

,分类,区域,部位,各部位明细项,参数,单位,说明/判定/范围,,

,一、已知条件/基础参数,/,/,设计规模,120000,m3/d,,,

,,,,变化系数,1.3,,,,需要填入的参数

,,,,最大瞬时流量Qmax,6500,m3/h,,,

,,,,,1.806,m3/s,,,

,,,,沉淀池分组n=,4,组,,,尺寸/区域/字母示意图

,,,,每组设计流量QD=,0.451,m3/s,,,

,,,,水温,10,℃,,,

,二、设计计算,1、沉淀池,清水区,表面负荷q=,16,m3/(m2·h）,,,

,,,,斜管占用百分数,4%,,,,

,,,,清水区面积,105.625,m2,,,

,,,,斜管区平面长度=,9.6,m,,,

,,,,斜管区平面宽度=,11,m,,,

,,,,出水渠宽度B0=,1.0,m,,,

,,,,出水渠壁厚=,0.2,m,,,

,,,,沉淀区长度L1=,12.4,m,,,

,,,进水区,宽度B1=,2.3,m,,,

,,,,流速,0.0158,m/s,,,

,,,集水槽,堰壁高度P=,0.28,m,小矩形出水堰,,

,,,,堰宽b=,0.05,m,,,

,,,,集水槽数量n=,12,个,,,

,,,,单个集水槽矩形堰数量,44,个,,,

,,,,总矩形堰数量n总=,528,个,,,

,,,,每个小矩形堰流量q=,0.00085,m3/s,,,

,,,,流量系数m=,0.43,,,,

,,,,堰上水头,0.043,m,,,

,,,,单个集水槽水量q'=,0.0376,m3/s,,,

,,,,集水槽宽度取值b'=,0.4,m,,,

,,,,末端临界水深,0.097,m,,,

,,,,集水槽起端水深h=1.73hk,0.17,m,,,

,,,,集水槽水头损失Δh=h-hk,0.071,m,,,

,,,,集水槽水位跌落,0.1,m,,,

,,,,槽深,0.4,m,,,

,,,池体高度,a.超高H1=,0.4,m,,,

,,,,b.斜管沉淀池清水区高度H2=,1,m,,,

,,,,c.斜管倾角=,60,°,,,

,,,,斜管长度=,0.75,m,,,

,,,,斜管区高度H3=,0.65,m,,,

,,,,d.斜管沉淀布水区高度H4=,1.5,m,,,

,,,,e.污泥回流比R1=,2%,,设计流量的百分数,,

,,,,污泥浓缩时间tn=,8,h,,,

,,,,污泥浓缩区高度,2.5,m,,,

,,,,f.储泥区高度H6=,0.95,m,,,

,,,,沉淀池总高度H=,7.0,m,求和H1至H6,,

,,,出水渠,末端临界水深,0.275,m,,,

,,,,起端深度,0.476,m,,,

,,,,水位低于清水区,0.2,m,上缘与池顶平,,

,,,,最大水深,0.5,m,,,

,,,,渠高HC=,1.1,m,,,

,,2、絮凝区,絮凝池尺寸,絮凝池水深H7=,6,m,,,

,,,,反应时间t2=,10,min,,,

,,,,絮凝室面积,45.14,m2,,,

,,,,絮凝室分格n=,2,格,正方形且并联工作模式,,

,,,,边长,4.75,m,,,

,,,导流筒,絮凝回流比R2=,10,,,,

,,,,筒内设计流量,2.483,m3/s,,,

,,,,筒内流速V1=,0.5,m/s,0.5-0.6之间,,

,,,,导流筒直径,2.51,m,导流筒外流速控制在0.1-0.3m/s，出口区流速控制在0.05-0.1m/s,,

,,,,喇叭口高度H8=,0.7,m,,,

,,,,角度,60,°,,,

,,,,下缘直径,3.21,m,,,

,,,,筒上缘以上部份流速V2=,0.25,m/s,,,

,,,,筒上缘距水面高度,1.3,m,,,

,,,,筒外喇叭口上部面积,17.60,m2,,,

,,,,筒外部喇叭口以上流速,0.141,m/s,,,

,,,,筒外喇叭口下缘面积,14.46,m2,,,

,,,,筒外喇叭口下缘流速,0.17,m/s,,,

,,,,筒喇叭口下部流速V5=,0.15,m/s,,,

,,,,筒下缘距池底高度,1.64,m,,,

,,,过水洞,每格絮凝室设计流量QDG=QD/2=,0.226,m3/s,,,

,,,,絮凝室出口过水洞流速V6=,0.06,m/s,,,

,,,,过水洞宽度B3=,4.75,m,,,

,,,,高度H10=,0.79,m,,,

,,,,水头损失h=,0.00019,m,,,

,,,出口区,出水区长度L2=,4.75,m,,,

,,,,出口区上升流速V7=,0.06,m/s,,,

,,,,出口高度B3=,0.792,m,,,

,,,,出口区停留时间t3=,1.667,min,,,

,,,出水堰高度,过堰流速V8=,0.05,m/s,,,

,,,,堰上水深H11=,0.950,m,,,

,,,搅拌机,提升水量QT=QN=,2.483,m3/s,水密度γ=1000kg/m³,,

,,,,提升扬尘HT=,0.15,m,,,

,,,,效率=,0.75,,,,

,,,,搅拌轴功率N絮=,4.87,Kw,,,

,,,,取值=,5.5,Kw,,,

,,,,桨叶直径=,1.4,m,根据上面的计算寻找合适品牌定出搅拌机主要技术参数,,

,,,,转速=,53.4,r/min,,,

,,,,排液量=,2.62,m3/s,,,

,,,,电机功率=,5.5,Kw,,,

,,,絮凝区GT值,不含出口区停留时间T=,10,min,,,

,,,,,600,s,,,

,,,,动力黏度μ=,0.0013050,Pa·s,1.305×10-3,,

,,,,GT值=,99582.17874,,,,

,,,,,9.95×104,＜1×105,,,

,,3、混合室,混合池尺寸,长度L3=,2.9,m,,,

,,,,宽度B4=,1.9,m,,,

,,,,水深H12=,6.2,m,,,

,,,,停留时间t1=(L3×B4×H12)/DQ=,75.682,s,,,

,,,,,1.26,min,,,

,,,搅拌机功率,混合室G取,500,s-1,,,

,,,,搅拌机轴功率N混=,11.15,Kw,,,

,,,水力计算,出水管总长L4=,1.8,m,,,

,,,,直径D3=,0.8,m,,,

,,,,流速V9=,0.90,m/s,,,

,,,,出水总管沿程水头损失h11=,0.0022,m,,,

,,,,出水总管局部水头损失h12=,0.144,m,,,

,,,,混合池出水支管L5=,7.4,m,,,

,,,,直径D4=,0.7,m,,,

,,,,流速V10=,0.59,m/s,,,

,,,,出水支管沿程水头损失h21=,0.0048,m,,,

,,,,出水支管局部水头损失h22=,0.035,m,,,

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