Pellet Machine-Kingwood 688
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Dryer
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Overview
With the shortage of environmental resources, the comprehensive utilization of biomass energy has been increasingly valued by us, and biomass pellet fuel manufacturing equipment has been further developed. In the utilization of biomass energy, due to the high water content of wood chips, sawdust, broken wood, straw, etc., direct combustion, low thermal efficiency, incomplete combustion, and gasification of moisture takes away a large amount of high-temperature heat energy, and generates a large amount of smoke, which increases environmental protection. Dust removal costs. The international general biomass utilization method is: biomass raw materials are crushed, dried and dehydrated, deashed, and formed under high pressure. The moisture is dried to 12-15%, the calorific value is 4200-4800kcal/kg, and the ash content is ≤1% to make energy accumulation. The pellet fuel is used efficiently. Our company has developed a three-layer single-channel dryer for raw materials according to market demand, which is suitable for wood chips, sawdust, bamboo chips, wooden shavings, shavings, barley straw, oat straw, wheat straw, rye straw, straw, Sorghum stalks, corn stalks, potato vines, bean stalks drying, peanut vines and other materials with a moisture content of 35-45%. According to the characteristics of each biomass material, output size, application requirements, cost control, degree of automation, on-site working conditions, etc., optimize the drying process technology. Recommended product: Three-layer single-channel rotary drum dryer. This equipment has large output, high efficiency and energy saving, and has a small footprint. It can save energy by 30-50% compared with ordinary dryers, which can maximize energy saving and drying costs.
Working principle
The material flow is: the crushed material with a moisture content of about 35-50% is fed into the drum by the conveyor to achieve downstream drying. The material is continuously picked up and scattered under the inner layer of the copying plate and moves forward in a spiral manner, passing through the inside, middle and outside Three layers, to realize the heat exchange between the material and the hot air, the material that achieves the drying effect travels quickly and is discharged out of the drum under the action of the wind, and the wet material that does not achieve the drying effect cannot travel quickly due to its own weight. The material is fully dried in the control stroke. To achieve the drying effect, the moisture content of the material is reduced to 12-15%, and the drying process is completed and discharged by the screw conveyor. A shock cleaning device is installed inside the drum to prevent the material from adhering to the wall of the drum.
The gas flow is: the air is pressurized by the hot blast stove blower and enters the hot blast stove for combustion and heating, and the temperature reaches 500-550℃. After the dryer, the induced draft fan sucks into the dryer to dry the material and evaporate the moisture. The temperature is reduced to 55-60℃ and discharged. In the dryer, the dust-containing moisture is collected by the cyclone dust collector, and the wet dust collector is purified and discharged up to the standard.
Main feature
1. It can realize intelligent control, one-button ‘dumb’ operation, automatic adjustment of operating parameters, and the dryer is always running in the best condition to ensure that the moisture of the dried wood chips is even and stable, which is more energy-efficient than traditional dryers.
2. Automatic impurity removal and iron removal to ensure that the impurities of the wood chips to be baked do not enter the subsequent process.
3. The thermal efficiency of the barrel self-insulation is as high as 70% or more (the thermal efficiency of the traditional single-cylinder dryer is only 35%), and the thermal efficiency is increased by more than 30%.
4. Using four-wheel drive, the transmission is more stable and reliable.
5. Compared with the single-cylinder dryer, it occupies about 50% less land, and the civil construction investment is reduced by about 50%.
6. The internal structure of the dryer adopts a variety of high-efficiency lifting plate combination modes, which can effectively control the drying process and heat distribution, with high heat utilization, and the exhaust gas exhaust temperature is lower than 50°C.
7. Using frequency conversion speed control to control the material flow, the final moisture index can be easily adjusted according to user needs.
8. Modular dust collection, dust removal and purification heat recycling configuration, safe and environmentally friendly.
9. Equipped with a variety of energy-saving new hot air stoves, which are highly energy-efficient, controllable heating, and simple to operate. Energy consumption can be reduced by about 30%, power consumption can be reduced by 20%, and operating costs are lower.
Technical parameters (moisture from 50% to 15%)
| Specification | Output (kg/h) | Evaporation capacity (kg/h) | Dimensions (diameter X length) | Heat demand (kcal/hour) |
| SG-10 | 1000 | 700 | ∅2000X4550 | 70X10^4 |
| SG-15 | 1500 | 1050 | ∅2000X6550 | 105X10^4 |
| SG-20 | 2000 | 1400 | ∅2300X6040 | 140X10^4 |
| SG-25 | 2500 | 1750 | ∅2300X7100 | 175X10^4 |
| SG-30 | 3000 | 2100 | ∅2300X9060 | 210X10^4 |
| SG-40 | 4000 | 2800 | ∅2700X9660 | 280X10^4 |
| SG-50 | 5000 | 3500 | ∅3000X10570 | 350X10^4 |
| SG-60 | 6000 | 4200 | ∅3450X10200 | 420X10^4 |
Evaporation capacity = production X<(1-15%)/(1-initial moisture)-1>=3x<(1-15%)/(1-50%)-1>=2.1 tons
The dryer evaporates 60 kg of water per cubic meter. To evaporate 1kg of water, 800-1000 calories are needed;
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