đồ án xử lý nước ngầm công suất 15000 m3ngđ

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CHƯƠNG I: ĐÁNH GIÁ CÁC CHỈ TIÊU CHẤT LƯƠNG NGUỒN NƯỚC
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Chỉ tiêu Đơn vị
đo
Giá
trị
QCVN:
02:2009/BYT
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
Chương II : ĐỀ XUẤT DÂY CHUYỀN CÔNG NGHỆ XỬ LÝ
1. Các Phương Pháp xử lý nước ngầm
1.1 Kiểm tra mức độ cần thiết clo hóa sơ bộ
^<%d'eK*,'YK>R8*#
+ _f,;#)'g))K)hUi%W)A/jO')Rc')kR[H
+ lU$'YKL'JKK?;X'+''T>N,U$'YKKK'JKK%WX,'#'
-OheK>m
+ lU$'YK-''T>%WO'I#
+ 6/'JKK,)K'#'*,/K)Yd'')A/j
+ *,'YK>R8JY-;<n'Ho'-/)WeK/,N/&/,RW'S
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/&HRW*pN*#n'g))KeK'Oq*pE
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RW*p*#n)-'#'UI*V
6Q'T*V;,/&KK'r'$/,Y'mKLNKK.#
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 ]KO')O)P'YK%W*,X)RsK,)E]tJ*X)*+*,;/,E

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 6)h'#'O'I*,;KO')*pRuK/)v)7K
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1.2 Công trình làm thoáng
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2
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2

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-/{'*#',-
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`1Ca1b6'c^K) 6/K2
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wCA'='|'=)

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1.3 Bể lắng
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'+'eKLNKKt%+*L?RW*LN8't%+;ˆZKRW*p
.#%+*pX'X)%YE]K%YNt%+O'I/jRu*,/K.#;ˆ.#,RW
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H%+)'/KQRW*L.#HK/IK*p%+r/X)RW'mKH
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CHƯƠNG III : TÍNH TOÁN – THIẾT KẾ
1. Tính toán thùng quạt gió.
1r*)A)hUiR&/,*#;j ƒ/82 Ea#$ %H-''K
 '#'*N*pUh.Y.)*O)K.#-''KR#-g
%„*#'#'ƒ)h;)A • NE
a. Diện tích thùng quạt gió
}x7
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- 0**+d',-0x 
!
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!
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- g%8Kd',-7
!

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2
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- aj.r*)A)hUi*##/~Z
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xz : 7
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*+ZKƒ)'j
Z
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!
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a)Ad'ƒ)'j*#

Žxxx!N7
2
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_d''ƒ)'jZX)YKxxxN37@
b. Tính chiều cao thùng quạt gióE
')PK,'jZX)Y%+d''~,'m
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7@
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Cx NDw2wN2x!NF
6'g))K*/,'jZX)Y
6xxx N 37'@x!z27@

c. Chọn bơm quạt gió.
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!
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!
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]16C^K)_'-'C#

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- C
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- C
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 E6M'ZK*#'|'=)E
- C
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xE6M'ZK='|'=)E
76M'ZK*.r*)A)hUi*$Ru! "')PK,.r*)ANM
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!
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xE ‘!x N7’@
d. Tính hệ thống phân phối nước lên mỗi thùng quạt gió.

 *>.#,ƒ)'jZX)Y
ZxxxDN27
!
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'p.r='S$/,=*#.
=
x"7))'X','f*# NF:N2
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 CA'='|'=)','jZX)YE
CA'=''=)','jZX)Y)#='d'.#='-'
%+R=/d'{'U>-E
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Hàm lượng cặn phát sinh sau làm thoáng

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Cặn Mn(OH)
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3. Bể lọc nhanh 2 lớp vật liệu lọc.
 Nhiệm vụ: ,X)Rs/)A%W-H'K*L.#O'*L%+?RW*L%mE
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+ -'X'K'
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- gOd'>%>;
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a. Tính kích thước bể
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 Diện tích mỗi bể:
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xxx3ND7
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2
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 Chiều cao của bể lọc nhanh hai lớp vật liệu:

pnvlS
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W'|'=)/IK*pK;j'A'='<*p-%).QKY/‚')YNS
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')P;#)F2E
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 Tổng số chụp lọc trên toàn bộ bể là:
]16C^K)_'-'C#

`1Ca1b6'c^K) 6/K\
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xxx ND7@
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 Tổn thất qua hệ thống phân phối bàng chụp lọc.
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'A=**+eK'<*pEx N
'xx Nz7@
c. Tính hệ thống rửa lọc
'pR)A'-/IKRWRu)YEOh'+E4>O'd.)g%82 *"E
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d. Tính toán ống dẫn nước rửa 1 bể lọc:
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6K'p.
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xy'p%gOd'=*#;
/
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Tính toán hệ thống cấp khí rửa lọc:
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2
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Z
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!
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Đường kính ống dẫn gió là:
;
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=x7@xy;

x xy.
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Chọn đường kính ống xả kiệt D = 100mm.
-$RW*pX,%8;=)x E .P'dK=USO)AE%=*LO',-E
Đường kính ống dẫn nước đã lọc ra khỏi một bể lọc
a

=xx N2zF7@
xya
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Đường kính ống dẫn nước đã lọc tập trung sang bể chứa

a=xx Nz\
'pax 
e. Tính toán máng phân phối thu nước rửa lọc
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%+*'>2N2@
 Lưu lượng nước rửa thu vào mỗi máng:
mm
ldWq
××=
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2
E
]16C^K)_'-'C#
`1Ca1b6'c^K) 6/K3
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;O',S-')TK-|-E;x2
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 Chiều rộng của máng
( )

2
5
3
1,57
m
m
q
B K
a
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+
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!
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
@.)IK')P/8eK
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_CA=%=).))h;)A-K)-E_x2E
xx2NEx N
xy'p4

x 
 Chiều cao phần hình chữ nhật:
xKExN!Ex N!!7@
 Chiều cao phần hình tam giác
'p'

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 Tổng chiều cao của máng thu nước:
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w'
;
x N!!w N2x N!
 Khoảng cách từ bề mặt vật liệu đến mép trên máng thu:
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N!w N Ex NF7@
 Máng thu nước rửa lọc tập trung của 1 bể
Khoảng cách từ đáy máng thu đến đáy máng tập trung
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
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)K=/p/gRu3EF"
2

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 Tổng chiều cao của máng thu nước rửa lọc tập trung
C
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K/XUI*V
f. Tính công suất bơm
4>/IK*pY-'=K
a)Ad'RW*pzUx2 7
2
@
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/
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/IK@.#Ru27"@E
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agOd'=;ˆz 
_'=)*+/)&eK?')A%8*#.)AEρx33F7O"

!
@
Tính cột áp cần thiết của bơm:
8-eKR>%+U-%c''~,'m
C
R>
xC

wC
2
wC
!
6/,%YC

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'/,RW'mK%hf-'/IKE
C
2
B*#8-%WO'L'<M'/,RW*pRK,M'ZK*s)%„E
M'ZK*.r*)A*p.#M'-*oO')'-.„OhRK%eK*
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6KY
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1.5 B*#%8K,Q*/&jeKRW'mK%h%-$RW*pE

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6KY
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