The raw materials to be treated should distribute on the conveyer beltthrough suitable mechanism such as star distributor, swing belt, crusher orgranulator, The conveyer passes through the channel including of one or several heating unit. Each heating unit is equipped with air heater and circle system. Each channel has one or several damp discharge systems. When the conveyer passes through it, hot air will pass through the raw material from up to low or from low to up. In this way the raw materials can be driedevenly.
The materials are uniformly put on the mesh-belt by the material charger. The mesh-belt uses generally 12-60 mesh stainless stainless steel wire net and it is drawn and moved inside the drier by a transmission device. The drier is composed of several unit. For each unit, the hot air is circulated separately. Some exhausted gas is discharged with a special moisture elimination blower. The waste gas is controlled through an adjustment valve.
The hot air passes through the mesh-belt covered with the materil from the top to the bottom of from the bottom to the top and this will complete the heat and mass transfer process. This process will bring the material water away. The mesh-belt moves slowly. Running speed can be freely adjusted according to the material temperature. The top and low circulation units can be freely equipped accord ing to the users'demand. The unit number can be selected according to the demand.
If used for dehydrated vegetable, in general, adapt three sets of equipment in series, l.e. primary drying section, middle section and final section. At primary drying section, because raw material contains high moisture and has poor air p[r]meability, the spread thickness is thin and the speed of operation is quick and the drying temperature is high. For raw materials that its drying temperature cannot be permitted over 60℃, at primary drying section, the drying temperature can be low 120℃, the stay time of raw material at final drying section will be that of 3-6 times of primary drying section and the spread thickness of raw material will be that of 2-4 times of primary drying section. For raw materials that its drying temperature should not be over 60℃, adapt about 80℃ of dryingf air. Adapt combination of several sections, the properties of drier can be developed better and the drying will be uniform better.
The belt dryer is an ordinary continuous drying equipment. It is widely used for chemical industry, foodstuff industry, pharmaceutical industry, construction materials industry, electronics industry and so on. Especially it is suitable for drying raw materials that are good in breathability and have the shape of pieces or strip of granule. It is also possible to dry the pasted raw materials such as filter cake after shaped through granulator or extruder.
| Type | DW-1.2-8 | DW-1.2-10 | DW-1.6-8 | DW-1.6-10 | DW-2-8 | DW-2-10 | |
| Quantity of unit | 4 | 5 | 4 | 5 | 4 | 5 | |
| Width of belt (m) | 1.2 | 1.6 | 2 | ||||
| Length of drying section (m) | 8 | 10 | 8 | 10 | 8 | 10 | |
| Thickness of spread raw material (mm) | 10–80 | ||||||
| Temperature of operation (℃) | 50–120 | ||||||
| Pressure of steam (Mpa) | 0.2–0.5 | ||||||
| Consumption of steam (kg/h) | 120–300 | 150–375 | 150–375 | 170–470 | 180–500 | 225–600 | |
| Area of heat exchange (m2) | 272 | 340 | 352 | 440 | 448 | 560 | |
| Drying time (h) | 0.2–1.2 | 0.25–1.5 | 0.2–1.2 | 0.25–1.5 | 0.2–1.2 | 0.25–1.5 | |
| Drying strength kg/h | 60–160 | 80–220 | 75–220 | 95–250 | 100–260 | 120–300 | |
| Qty of fan | 5 | 6 | 5 | 6 | 5 | 6 | |
| Total power of fan (kw) | 9.9 | 12.1 | 9.9 | 12.1 | 18.2 | 22.2 | |
| Total power of equipment (kw) | 11.4 | 13.6 | 11.4 | 13.6 | 19.7 | 23.7 | |
| Overall dimensions | L (m) | 9.77 | 11.77 | 9.77 | 11.77 | 9.77 | 11.77 |
| W (m) | 1.5 | 1.5 | 2.24 | 2.24 | 2.66 | 2.66 | |
| H (m) | 2.83 | 2.83 | 2.83 | 2.83 | 3.5 | 3.5 | |
| Weigh (kg) | 4800 | 5780 | 5400 | 6550 | 6350 | 7800 | |
| Item \ Model | DWC-20 | DWC-25 | DWC-32 4M | DWC-36 4.5M | DWC-48 6M | DWC-60 7.5M | DWC-80 10M |
| Loading area (m²) | 20 | 25 | 32 | 36 | 48 | 60 | 80 |
| Stream consumption (Mpa) | 0.4–0.7 | ||||||
| Steam consumption (kg/h) | 150–300 | 180–375 | 240–480 | 270–540 | 360–720 | 450–900 | 600–1200 |
| Drying consumption (min) | 20–300 | 60–600 | 100–1000 (no grade) | ||||
| Evaporation capacity (kg.H₂O/h) | 100–200 | 125–250 | 160–320 | 180–360 | 300–480 | 300–600 | 400–800 |
| Power (kw) | 5.5 | 5.5 | 5.5 | 5.5 | 14.2 | 15.2 | 15.2 |
| Weight (T) | 8 | 8 | 8.5 | 10 | 11 | 13 | 15 |
| Overall dimensions (mm) | 8875 × 2408 × 3385 | 9875 × 2408 × 3385 | 11475 × 2408 × 3385 | 11475 × 2408 × 3385 | 14675 × 2408 × 3385 | 14675 × 2840 × 3385 | 15675 × 2840 × 3385 |
