Coal-fired boiler
Steam Boiler is a necessary Auxiliary Equipments for a paper mill, there are coal fired boiler and gas/oil fired boiler. It is for supplying the steam for the dryer cylinder of paper machine so as to dry the paper.
DZH Coal-fired boiler:
| Type | DZH1-0.7-AII | DZH2-1.0-AII | DZH4-1.25-AII |
| Rated evaporation (t/h) | 1 | 2 | 4 |
| Rated working pressure (MPa) | 07,1.0,1.25 | 1.0,1.25 | 1.25 |
| Rated steam temperature | 171,184,194 | 171,184,194 | 194 |
| Rated feed-water temperature | 20 | 20 | 20 |
| Reference heating area(m2) | 36.5 | 76.12 | 135.98 |
| Gate area(m2) | 1.9 | 3.74 | 4.3 |
| Fuel | Coal | Coal | Coal |
| Thermal efficiency (%) | 77.16 | 77 | 78 |
| Consumption of fuel (kg/h) | 120 | 240 | 360 |
| Dimension (L*W*H) (m) | 3.88*1.84*3.12 | 4.46*2.24*3.32 | 5.32*2.4*3.65 |
| Approximate weight (T) | 9.58 | 13 | 15.14 |
| Main steam valve(mm) | DN50 | DN80 | DN100 |
| Feed-water valve(mm) | DN32 | DN40 | DN40 |
| Safety valve (mm) | 2*DN40 | 2*DN50 | 2*DN50 |
| Drain valve (mm) | DN40 | DN40,DN50 | DN40,DN50 |
| Liquid level meter (mm) | DN25 | DN25 | DN25 |
DZL Coal-fired boiler:
| Type | DZL6-1.25-AII | DZL8-1.25-AII | DZL10-1.25-AII |
| Rated evaporation (t/h) | 6 | 8 | 10 |
| Rated working pressure (MPa) | 1.25 | 1.25 | 1.25 |
| Rated steam temperature | 194 | 194 | 194 |
| Rated feed-water temperature | 20 | 20 | 20 |
| Reference heating area(m2) | 226.72 | 396.26 | 412.3 |
| Gate area(m2) | 7.22 | 10.3 | 11.8 |
| Fuel | Coal | Coal | Coal |
| Thermal efficiency (%) | 81 | 81 | 79.6 |
| Consumption of fuel (kg/h) | 888 | 1185 | 1507 |
| Dimension (L*W*H) (m) | 6.92*2.83*3.72 | 7.56*3.28*4.25 | 9.5*3.35*4.9 |
| Approximate weight (T) | 38.13 | 54.26 | 57.63 |
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