7 - energetski parni kotlovi
DESCRIPTION
KOTLOVITRANSCRIPT
-
, . . , , .
, , .
-
, , , 25 % . , .
, .
D
-
: - , - , - - .
D
-
.
, , . s1 = 2(dnc +d ), dnc [mm] - , d [mm] - .
-
.
-, . , . .
-
, . .
, s1 = 2d.
-
.
- , - . , - -, .
-, , . .
-
. d = 31,8 mm s1 = 100 mm s2 = 50 mm d = 38 mm s1 = 110 mm s2 = 55 mm. .
- , - . - - - .
- , , .
-
, , . , . , .
- - - , , , .
-
- - - , .
-
, .
- - . - - , -. , , .
- .
-
5 - 8 % ( 1,8 m) . .
0,7 m, .
-
- D = 6,944 kg/s
- ps = 16 bar
- ts = 350 oC
- tnv = 110
-
-
-
.
( ), , .
:) , ) ) .
() .
-
, , . , .
, , .
-
. (3) (2) (4) .
, , 40 1,5 mm 51 1,5 mm, .
-
. , , . wg = 10 - 14 m/s, wv = 6 - 8 m/s. , . (7).
-
(6) (9) , (8) , , (), . (5) .
, (1).
-
, , .
.
-
. , .
- . , - - (400 ). - - -.
-
, , . , .
, , , .
-
- D = 22,222 kg/s
- ps = 46 bar
- ts = 450 oC
- ()
-
- , , -, , .
K - , (Ljungs-trm) .
(3) (1) (2) .
-
- (4). - - . - (5) (6) , (7) (8) -. , . . , - , .
-
, - . -, . , - - , - , - , .
, - , (2 3 o/min).
-
, . zv = 0,2 (zv = 0,3 - 0,35).
[ W ]
[ W ]
( )giggg ttHQ = 1 ( )vvivv ttHQ = 2
1 ; 2 [W/m2] - ,
Hg ; Hv [m2] - - ,
tg ; tv [C] -
git ;
vit [C] -
.
-
, ,
[ W ]
, ,
[ oC ]
[ oC ]
, ,
[ W ]
QQQ vg ==
g
gig H
Qtt1
=
vv
vi H
Qtt2
=
( )[ ]vigivgvg
tttt
HH
Q +
=21
111
-
Hg = x1H ; Hv = x2H [ m2 ]
, (tg - tv) ,
[ W ]
[ W/m2K ]
vi
gii ttt =
( )vgvgi
ttH
xx
ttt
Q +=
2211
11
1
tkHQ =
2211
11
1
xx
ttt
k vgi
+=
-
,
.
= 1 - - . , , - n = 1,5 o/min. - .
=
+=
+=
vg
irek
vg
ivg
i
reg tttk
ttt
xxxx
ttt
k 11111
11
1
22112211
vg
i
ttt
=1
-
, . , , , .
, , , .
: , . , .
-
( )
- P = 160 MW
- D = 160 kg/s
- ps = 174 bar
- ts = 538 oC