1. design(ed) value
boiler duty:320t/h
Boiler quantity：1set
flue gas volume：600000m3/h
Flue gas inlet temperature：140℃
Inlet SO2 concentration in flue gas：2000mg/Nm3
SO2 emission concentration of net flue gas at outlet：＜35mg/Nm3
Export dust content: ＜5mg/Nm3
sulphur removal efficiency＞99%
2.Index consumption
Removal of SO2： 779.34kg/h， 6234.71t/a
Waste ammonia water（10%）： 4.27t/h, 34160t/a
By-product ammonium sulfate： 1623.62kg/h， 12988.98t/a
water deprivation ： 13.6m3/h， 108800m3/a
power consumption： 740kw/h 592ten thousandkw·h /a
3.Unit cost
Including: raw and auxiliary materials costs, power fuel costs, personnel wages, maintenance costs, the following price calculation:
Waste ammonia water（10%）： 100yuan/ton
fresh water (FW) ： 2yuan/ton
electrovalence： 0.5yuan/kWh
staff wages： 40000yuan/year
ammonium sulphate： 500yuan/ton
Comparison of ammonia method and calcium method in magnesium consumption
| ammonia absorption process | Calcium absorption process | magnesium reduction process |
Unit cost | Waste ammonia water（10%）：100yuan/ton | CaO(80%)： 350元/吨 | MgO (78%)： 700元/吨 |
economic indicator consume | Removal of SO2： 6234.71t/a | Removal of SO2： 6234.17t/a | Removal of SO2： 6234.17t/a |
| ammonia desulfurization | Calcium desulphurization | Desulfurization by Magnesium Oxide process | |||||||||
project | specifications | unit | Annual consumption | Cost / million yuan | specifications | unit | Annual consumption | Cost / million yuan | specifications | unit | Annual consumption | Cost / million yuan |
desulfurizer | 10% | 100yuan/t | 34160 | 341.6 | 80% | 350yuan/t | 7023.18 | 245.8 | 78% | 700yuan/t | 5145.19 | 360.16 |
water |
| 2yuan/t | 108800 | 21.76 |
| 2yuant | 128000 | 25.6 |
| 2yuan/t | 121073 | 24.2 |
electricity |
| 0.5yuan/kWh | 5920000 | 296 |
| 0.5yuan/kWh | 1179.4 | 589.7 |
| 0.5yuan/kWh | 852.6 | 426.3 |
wages for workmen |
| 40000.person·year | 8 | 32 |
| 40000.person·year | 8 | 32 |
| 40000.person·year | 8 | 32 |
unkeep |
| million | 20 |
| million |
| 25 |
| million |
| 25 | |
Direct operating cost subtotal |
| million | 711.36 |
| million |
| 918.1 |
| million |
| 867.66 | |
by-product |
| 400yuan/T | 12988.98 | 519.559 |
| 5yuan/T | 20176.63 | 10.09 |
| 100yuan/T | 23962.6 | 239.6 |
Annual comprehensive desulfurization cost deducted from sales income |
| million | 191.801 |
| million |
| 908.01 |
| million |
| 628.06 | |