|
1376*0,949(16/160)=130,6 kg/t.
FeO quyidagicha tiklanadi:
(FeO^ + Q0K *FeOda5t) - (* FeO^J = [1175,2 + (1376 * 0,01)] - 1006,3 * 0,059
kg
= 1129,6 —
FeO ni tiklashda quyidagicha kislorod ajratib olinadi:
1129,6 - 1006,3 Femet=1129,6 - 1006,3*0,873=251,1 kg,t.
Jami quyidagicha kislorod ajratib olinadi:
O2=130,6+251,1=381,7 kg/t yoki
* 22,4/32= 267,2 nm3/t Aylanma sovituvchi gaz sarfini aniqlash Sovitish zonasining issiqlik balansi.
Issiqlik kelishi:
metallangan okatishlar bilan:
gmoCt = 1006,3 * 0,167 * 835 = 140365 kkal (586726 kJ/t), bunda, 0,167- 0-900 °C oralig‘ida metallangan okatishlarning issiqlik sig‘imi, kkal/(kg-°C) (0,698 kJ/(kg-°C); 835- metallangan okatishlarning sovitish zonasiga kirishdagi harorati, °C;
qaytar sovituvchi gazlar orqali:
VEq7yCpt = 0,3135* 40 = 12,54^(52,42 kj}. pech devorlari orqali:
40000 : 50,5 = 792 kkal (3310,6 kJ)
Jami a) va b) punktlar bo‘yicha 11901 kkal (49746,6 kJ) bunda, 50,5 - pech unumdorligi, t/s.
Aylanma sovituvchi gaz quyidagicha issiqlikni olib ketadi:
(C™ = 0,3260 kkal/(nm3 * °C}}.
VE™y = 0,3260.750 = 246,13y“£fefeai(1028,8fe/).
Komponent
|
Furma gazi
|
Aylanma sovituvchi gaz
|
Parchalanishi
|
Tiklagich gaz
|
CO2
|
1.9/25.9
|
1.5/8.2
|
-/-
|
1.7/34.1
|
CO
|
30.5/427.6
|
32.0/176.0
|
-/-
|
30.7/603.6
|
H2
|
55.4/775.6
|
59.4/326.7
|
+33.0/-
|
57.8/1135.3
|
CH4
|
1.7/23.4
|
1.0/5.5
|
16.6/-
|
0.6/12.4
|
N2
H2O
I
|
2.4/33.9
|
4.5/24.8
|
-/-
|
3.0/58.7
|
8.1/113.2
|
1.6/8.8
|
-/-
|
6.2/122.0
|
100/1399.7
|
100/550
|
16.5/-
|
100/1966.2
|
140365 + 12,54V™
11901+ 246,131V™;
(536726 + 5242V™) = (49746,6 + 1028,8V™};
= 550 nm3
Aylanma sovituvchi gaz quyidagini tashkil etadi
140365 + 12,54V™ 11901+ 246,131V™;
536726 + 5242V™) = (49746,6 + 1028,8V™};
Tiklagich gaz tarkibi (surat -%, maxraj - nm3)
Tiklagich gazning umumiy sarfini hisoblash
Okatishlarning 267,2 nm3 kislorodini ajratib olishga va uni gazga aylantirishga O2 + 2CO = 2CO2 va O2 + 2H2 = 2H2O; reaksiyalar bo‘yicha CO va H2 sarflanadi 267,2 * 2 = 534,4 nm3.
Gazda tiklagichlarning ~ 85% miqdorida va pech orqali bir o‘tishda gazdan 32% foydalanish darajasida gazning umumiy sarfi:
Vum = 534,4/(0,32 * 0,85) = 1965nm3/t.
550 nm3/t sovitishga furma gazi sarfi (aylanma gaz sarfini hisobga olib) quyidagini tashkil etadi: 1965-550=1415 nm3/t.
Aralash gaz sarfi (qisman gaz quvurda va qisman pechda parchalanadigan, furma oldidagi 28 nm3/t tabiiy gazni, shuningdek, haroratni tartibga solish uchun 10 nm3/t gacha sovuq aylanma gazni berishni hisobga olish bilan) quyidagini tashkil etadi:
1415- (28-2+10) = 1349 nm3/t.
Konversiyalangan va aylanma gazlar sarfini (ularni aralashtirish balansi bo ‘yicha) aniqlash
Konversiyalangan gaz sarfini- X; aylanma gaz sarfini - (1349-X), bunda X*1400*0,3509 + (1349 - X)40*0,3135 = 1349*1000*0,3373, X=915 nm3/t qabul qildik.
Aylanma gaz sarfi: 1349 - 915 = 434 nm3/t (4.15-jadval).
Aralash gaz haroratini tekshirish:
VkrtkrC^ + Vqay-gtq!iyClay = 915 * 1400 * 0,3509 + 434 * 40 * 0,3135 = 1349^ * 0,3373,
= 1003DC.
Trakt bo‘yicha issiqlik talafotini hisobga olish bilan VTKM konverteridan halqali gaz quvurigacha aralash gaz harorati 1000 °C tashkil etadi.
Aralash gaz tarkibi (surat -%, maxraj - nm3)
Komponent
|
Konversiyalangan
gaz
|
Aylanma gaz
|
Aralash gaz
|
CO2
|
2.1/19.2
|
1.5/6.5
|
1.9/25.7
|
CO
|
31.2/285.5
|
32.0/138.9
|
31.5/424.4
|
H2
|
53.2/486.8
|
59.4/257.8
|
55.2/744.6
|
CH4
|
0.4/3.7
|
1.0/4.3
|
0.6/8.0
|
N2
H2O
I
|
1.5/13.7
|
4.5/19.5
|
2.5/33.2
|
11.6/106.1
|
1.6/6.9
|
|
100/915
|
100/434
|
100/1349
|
Tiklagich gaz tarkibi va haroratini aniqlash
Aralash (yoki konversiyalangan) gaz quvuriga kiritiladigan va qorakuyali
uglerod hosil bo‘lishi (~ 5 g/nm3) bilan parchalanadigan tabiiy gazni qo‘shishni 28
nm3/t, 45% deb qabul qilamiz. Qolgan miqdor furma gaziga puflanadi va tiklash
zonasi pechida parchalanadi.
Shunday qilib, aralash gazga 28-0,45=12,6 nm3/t tabiiy gaz puflanadi. Tabiiy
gazning ushbu miqdori parchalanishida SN4 -S+2N2 reaksiyasi bo‘yicha (12/22,4)
12,6* 0,997= 6,73 kg/t uglerod; 12,6-2-0,997 =25,1nm3/t vodorod hosil bo‘ladi, bunda 0,997 - tabiiy gazdagi uglevodorodlar ulushi (SN4 ko‘rinishida shartli qabul qilingan).
Pechga tabiiy gaz bilan birga quyidagilar kiritiladi: [(28-12,6)0,997]= 15,3CH4, nm3/t (furmaga); 28*0,009=0,25 N2, nm3/t; 28*0,003=0,1 CO2, nm3/t.
Furma gaziga uning haroratini tartibga solish uchun 10 nm3/t aylanma gaz puflanadi.
Furma gazining tarkibi (surat -%, maxraj - nm3)
Komponent
|
Aralash gaz
|
Aylanma gaz
|
Tabiiy gaz
|
Furma gazi
|
CO2
|
1.9/25.7
|
1.5/0.1
|
0.1/-
|
1.9/25.9
|
CO
|
31.5/424.4
|
32.0/3.2
|
-/-
|
30.5/427.6
|
H2
|
55.1/744.6
|
59.4/5.9
|
25.1/-
|
55.4/775.6
|
CH4
|
0.6/8.0
|
1.0/0.1
|
15.3/-
|
1.7/23.4
|
N2
H2O
I
|
2.4/33.2
|
4.5/0.5
|
0.2/-
|
2.4/33.9
|
8.5/113.0
|
1.6/0.2
|
-/-
|
8.1/113.2
|
100/1349.0
|
100/10.0
|
40.7/-
|
100/1399.7
|
Furma gazi harorati
Issiqlik kelishi:
aralash gaz bilan:1349*1000*0,3373=455018 kkal (1901975 kJ); tabiiy gaz bilan: 28*30*0,369=310 kkal (1296 kJ); aylanma gaz bilan: 10*40*0,3135=125 kkal (523 kJ).
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