As Chinese coal drying industry set design, production, sales in the integration of science and technology enterprises. After nearly 20 years of rapid development, Dingli has gradually become a steadily drying equipment industry in China and the first brand of the company. This set of equipment technology is advanced, stable running, convenient operation and maintenance.
This type of equipment available to dry all kinds of coal, carbon coal, charcoal, anthracite coal, lean coal, coking coal, lignite, coal washing, screening, raw coal, tail coal, raw coal, etc. Equipment can be made according to the customers' requirements.
Anthracite coal drying technology is divided into drum drying and drum distillation units-two kinds of technology. Drum drying means adopting rotary drum dryer for drying to reduce the water moisture, its products are high heat value quality coal; Drum drying distillation technology refers to using rotary drum dryer and rotary distillation machine together, the dryer dehydration and heat of coal , dry distillation machine dry distillation of coal removal volatile part and the internal moisture, the product is high heat value, low sulfur, low water moisture, low volatile of dry distillation upgrade coal .
Coal rotary dryer mainly by the heat source, belt feeding machine, rotary drum, belt discharging machine, induced draft fan, cyclone dust collector, bag filter, nitrogen or carbon dioxide gas oxygen concentration prosecution explosion-proof security system, power distribution and temperature, pressure, oxygen concentration, speed of interlocking spreading system. The equipment adopts the countercurrent (or downstream) drying technology, its working principle is as follows:
wet material after entering drying drum points divided into the following workaround:
1. Feeding area, the coal into the area with high-temperature hot air quickly evaporates moisture, the material in large Angle of guide plate copy, to be imported into the next workspace.
2. Copy the plate area, the coal in this area is lifting by copy board and forming curtain material status, the coal temperature gradually increased to more than 150-250 ℃ (different types of coal with different temperature), at this time the material has good contact with hot air, the moisture in coal rapid evaporation and become water vapor, water vapor was siphoned off by induced draft fan, so as to achieve the aim of depth drying. The coal in this area was dried into the moisture content less than 5% (or much lower) with state loose, after heat exchange materials achieved the required moisture state, into the final discharging area.
3. Discharging area, the dryer does not set a copy plate in the region, the material in this area with scroll taxiing to the discharge port, to complete the whole drying process.
| Model | Capacity(T/D) | Initial moisture(%) | Final moisture(%) | Main power(kw) | Covering area(m²) |
| DLMG1920 | 300 | 15-30 | ≤5 | 150 | 8*32 |
| DLMG2224 | 500 | 200 | 10*40 | ||
| DLMG2528 | 700 | 265 | 10*45 | ||
| DLMG2830 | 1000 | 320 | 10*50 | ||
| DLMG3432 | 1500 | 460 | 12*50 | ||
| DLMG4035 | 2000 | 550 | 15*55 |
