折板絮凝平流沉淀池設(shè)計(jì)計(jì)算

--PAGE10設(shè)計(jì)規(guī)模：5給水排水工程快速設(shè)計(jì)手冊(cè)1 本次設(shè)計(jì)共設(shè)置兩座折板絮凝池（與平流式沉淀池合建Q=50000×1.05=26250m3/d=0.304m3/s20.608m3/s0.3046條廊道，三檔流速。3500mm，夾9060mm1-1所示。1-1異波折板示意圖0.9mv10.3m/s，則L=13.1m612b

=???6b2?5b1?12t=13.1?6×1.27?5×0.56?12×0.04= ==①中間部分

=ε??12???22=0.5×0.32?0.1332= 漸縮段損失：h2=[1+ε2

=[1+0.1?

=33②側(cè)邊部分11漸放段損失：h，=11

??1

=0.5

=

222漸縮段損失：h，=[1+22

?(1)

=[1+0.1?

)1。

=6H40.68m，H31.0m。進(jìn)口流速：v30.4m/shh④總損失

=3

2×

+6×3

2×

+6×1.8

2×

=1第一絮凝區(qū)總損失：H=h=hhh=0.1980.00580.0845=1

=??×??×??=0.9×13.1×3.8=

1 = =1

3500mm，夾9060mm1-2所示。1-2同波折板示意圖0.9mv10.16m/s，則L=13.1m8b3+b4：b3b4=13.11.06×70.048= v，：v，=Q/(b×b)=0.152/(2.5×0.9)=0.068m/sv，：v

=ε??12=0.6×

=

429011漸放段損失：h，=11

??1

=0.5

=

222漸縮段損失：h，=[1+22

?(1)

=[1+0.1?

)

=6H40.68m，H31.0m。進(jìn)口流速：v30.25m/shh

=3

2×

+4×3

2×

+4×1.8

2×

=2第二絮凝區(qū)總損失：H=h=hhh=0.032760.0006480.0496=2

=??×??×??=0.9×13.1×3.8=

2 = =2

1-3所示。1-3平行直板示意圖0.95mv10.10m/s，則L=13.1m8側(cè)邊間距0.10m/s，轉(zhuǎn)彎及進(jìn)口ε3.0h為h=8×3

2×

+3

2×

=第三絮凝區(qū)總損失：H3=

=??×??×??=0.95×13.1×3.8=

3 = =3

1-11-1水頭損失GT1-41-51-61-41-51-6DN200mm45°方向向下開(kāi)φ30mm@300mm18根排泥管。2座。采用平流沉淀池,Q2

×1.05=v=15mm/s。2-12-1沉淀池面積 A=??

= 沉淀池長(zhǎng)度 L=vT=15×10?3×3600×1.5=沉淀池寬度 B=??=506.67=6.26m，取 實(shí)際沉淀池面積 A=81×6.5=實(shí)際截留沉速 u=??=0.304=0

沉淀池有效水深 H=????=0.304×1.5×3600=3.12m，取3.2m， 實(shí)際停留時(shí)間 T=BLH=6.5×81×3.2= 實(shí)際水平流速 v=??

= T=1.54h1.5~3.0hv=14.61mm/s10~25mm/s的要求H=3.2m3.0~3.5m的要求B=6.5m3~8m長(zhǎng)度與寬度之比為：??=81=12.46>4 長(zhǎng)度與深度之比為：??=81=25.31>10

0.1m/s，盡量做到在進(jìn)水?dāng)嗝嫔纤?.5m3.5m3.2m2-2所示。2-2i=1%泥斗集泥，根據(jù)平面布置尺寸，故第一道穿孔花墻采用0.5+0.5=1.0m0.5+0.4=0.9m。0.1m，結(jié)合絮凝池水深需要，根3.7m孔口個(gè)數(shù)為：3.04/0.0576=5351155個(gè)1.0m，則豎向的計(jì)算高度為：0.24×5+0.25×4+0.5+1.0=3.7m，可以?？卓趥€(gè)數(shù)為：3.04/0.014=217925225個(gè)0.9m，則豎向的計(jì)算高度為：0.12×9+0.15×8+0.5+0.9=3.6m，可以。2-32-42-32-43hdd=√0.7BL??0.5=√0.7×6.5×81×3.20.5=0.247md=DN250mm

d=35mm0.07m0.05m，則每孔流量為：q，=0.62×??×0.0352√2??×0.07=6.99×4集水槽每邊開(kāi)孔個(gè)數(shù)為：0.0608/(2×6.99×10-4)=43個(gè)按孔口間距@=180mm45個(gè)。1.0m3則出水渠起端水深H=√3×

=0.23+0.30+0.05+0.07=0.65m1.0m0.7m。2-52-5數(shù)：Fr=??2=

=1.35×10?5 雷諾數(shù)：Re=????=1.4