Focus on heavy equipment
Focus on heavy equipment
Paper sludge dryer is widely in drying paper sludge, pulp, pulp sludge, pulp fiber, papermaking fiber, etc.
Paper sludge dryer is widely in drying paper sludge, pulp, pulp sludge, pulp fiber, papermaking fiber, etc.
Paper mill sludge is the sludge produced by the wastewater treatment system of paper mills. It contains organic components, inorganic components, and water. The organic components are wood and cellulose fibers of varying lengths, lignin, and a small amount of organic binders. The main inorganic components are kaolinite (clay) and calcium carbonate (paper mill additives). Paper mill sludge has a high moisture content, is unstable, easily decomposes and emits foul odors, and has high transportation and disposal costs. It must be dried before further treatment or resource utilization. Based on the characteristics of paper mill sludge, we have developed this drying equipment for drying paper mill sludge—a three-stage multi-loop rotary drum dryer. By reducing volume and moisture content, it increases solids content, ultimately yielding a stable product. The dried sludge can be used as fuel in cement plants or combined heat and power plants, significantly improving energy efficiency.
Our drying solutions are applicable to all stages of paper production. Besides papermaking sludge, they can also treat:
Pulp: Pulp is a fibrous pulp formed from wood or non-wood fiber raw materials through chemical or mechanical pulping. Its moisture content is typically 85-95%, and while the fiber structure is intact, it is sensitive to temperature and mechanical shock. After dewatering, the pulp runs at low speed and low board height within the drum. Hot air is used within a controlled temperature range and evenly distributed along the material's axis, allowing moisture to evaporate slowly and preventing over-drying of the fibers. The dried pulp exhibits improved stability, meeting the needs of repulping or further processing.
Pulp Fiber: Pulp fiber is the effective fiber component separated from the pulp and is a core raw material for subsequent papermaking and specialty fiber products. It requires high fiber strength, length, and integrity. For drying pulp fiber, the drum features a large diameter, low linear velocity design, with internal flexible boards and a uniformly dispersed structure. This allows the fibers to form a loose curtain within the drum, ensuring sufficient but gentle contact with the hot air. The dried pulp fiber retains its paper-forming properties and physical strength well.
Papermaking Fiber: Papermaking fiber refers to the effective fiber system used directly in the papermaking process after screening, pulping, and proportioning. It typically includes virgin and recycled fibers. Our drying system employs a zoned temperature-controlled drum dryer process, ensuring thorough fiber agitation while avoiding strong mechanical shearing. The hot air flow field is optimized to ensure uniform fiber heating and prevent clumping.
Pulp Sludge: Pulp sludge is the sludge generated in the pulping process. Its main components are underutilized fibers, fine fibers, and a small amount of inorganic impurities. The moisture content is generally 60–75%, with a high organic matter content. After being crushed and dispersed, the pulp sludge is evenly fed into the drum dryer. Inside the drum, heavy-duty tumblers and scattering ensure thorough dispersion of the sludge. Forced heat exchange with high-temperature hot air achieves rapid moisture evaporation, creating conditions for incineration, co-firing, or energy utilization.
Widely used for drying paper sludge, pulp, pulp sludge, pulp fiber, papermaking fiber, etc.
After dewatering, the papermaking sludge first enters the rotary drum dryer via a conveying and crushing device. The material is evenly dispersed before entering the main dryer to prevent clumping and sticking to the walls. The drying system employs a three-section, multi-loop rotating drum structure. Each section of the drum is configured with different diameters, rotation speeds, and internal lifting plate designs based on the sludge's moisture content. The drums rotate slowly, and the internal lifting plates continuously lift, tumble, and scatter the sludge, ensuring full contact with hot air and achieving uniform moisture evaporation.
The material moves slowly along the drum's axial direction. As the moisture content decreases, the volume shrinks, and the solid content increases, resulting in a stable and efficient drying process. The multi-section drum and zoned temperature control design effectively prevent localized overheating or carbonization, ensuring uniform drying. The exhaust gas generated during evaporation is treated by a cyclone and bag filter system to control dust and odor.
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1. The three-cylinder structure significantly reduces the equipment's footprint while ensuring thorough material drying.
2. The equipment is easy to operate, with a digital control panel that is user-friendly and easy to maintain. It requires minimal labor and can operate stably for 24 hours continuously with a low failure rate.
3. The low-temperature, high-volume drying process ensures high drying efficiency and low energy consumption, while maintaining stable quality of the dried pulp or fiber materials.
4. The equipment has a large processing capacity and high thermal energy utilization rate, reducing energy consumption and production costs. Low-cost energy sources such as steam, biomass, natural gas, or coal can be selected as heat sources.
5. The entire system operates in a sealed manner and uses a negative pressure process, eliminating any risk of combustion or explosion. High-temperature drying simultaneously sterilizes and deodorizes the sludge.
6. Sludge weight can be reduced by approximately 60%, and its volume reduced by 4-5 times, lowering transportation costs, increasing calorific value, and achieving resource utilization.
| Model | Capacity(t/h) | Evaporation Moisture Capacity(t/h) | Initial Material(%) | Final Moisture Content(%) | Drying Temperature (℃) | Power(kw) | Total Weight (kg) | Area(m²) |
|---|---|---|---|---|---|---|---|---|
| JTNG1412 | 5.4 | 1.2 | 60-80% | 10-20%（adjustable) | 850±100℃ | 65 | 25000 | 6m*18m |
| JTNG1615 | 6.6 | 1.9 | 115 | 48000 | 6m*18m | |||
| JTNG1916 | 13.5 | 3.0 | 138 | 67000 | 8m*24m | |||
| JTNG2218 | 19.8 | 4.4 | 170 | 85000 | 10m*24m | |||
| JTNG2518 | 25.6 | 5.7 | 240 | 92000 | 10m*30m | |||
| JTNG2522 | 31.5 | 7.0 | 320 | 110000 | 10m*36m | |||
| JTNG2823 | 41.4 | 9.2 | 450 | 150000 | 10m*36m | |||
| JTNG3430 | 80.0 | 17.7 | 680 | 265000 | 10m*48m |
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