Paper making sludge dryer

Paper making sludge refers to the sediment, particulate matter, and floating particles generated after treating wastewater using physical, chemical, chemical, and biological methods. Sludge generally refers to a thick substance between liquid and solid. Paper making sludge can be divided into biological sludge, alkali recovered white sludge, and de ink sludge according to their sources.
Paper making sludge is the terminal product of wastewater treatment in the pulp and paper process. For every ton of paper produced, about 700kg of sludge with a water content of 30% -98% is produced, which is 5-10 times the output of municipal sewage treatment plants of the same scale. Moreover, the composition is complex, the water content is high, and the treatment difficulty is high. Therefore, the disposal of sludge has become a major problem that restricts the development of paper making enterprises.
Poor disposal of papermaking sludge can cause secondary pollution to the environment and also affect people's health. To treat papermaking sludge, it is necessary to usePaper making sludge dryerThis is a built-in mixer that allows sludge to fully contact the heat carrier, thereby achieving the function of drying sludge. The sludge can be used as a soil amendment, fuel, and raw material for brick making, thus achieving the goal of turning waste into treasure, energy conservation and emission reduction, green environmental protection, and increasing the economic income of paper making enterprises.

Equipment Introduction

Our company's designed and manufactured "Double Spiral Paper making Sludge Drying Machine" can dry paper making sludge with a moisture content of 80% -90% after dewatering (such as pressure filtration). The moisture content of the dried sludge reaches 20% -30%. After treatment, the heat generation per ton of dry sludge reaches 1200-2000 calories (equivalent to 220KG-480KG of coal). It can be mixed with coal and burned together in the boiler, effectively solving the problems of sludge transportation and landfill.

Performance Characteristics

The characteristics of the paper sludge dryer are as follows:
1. The paper mill sludge dryer has low energy consumption: due to indirect heating, it does not carry a large amount of air and take away heat, and the outer wall of the dryer is also equipped with insulation layer.
2. Low cost of use: Having a larger heat transfer surface per unit effective volume shortens processing time, reduces equipment size, and significantly reduces building area and space.
3. Wide range of material processing: using different heat media, it can handle both thermosensitive materials and materials that require high-temperature treatment. Common media include water vapor, thermal oil, hot water, cooling water, etc., which can be operated continuously or intermittently. Can be applied in many fields.
4. Low environmental pollution: No use of portable air, minimal dust and material entrainment, low solvent evaporation of materials, easy to handle. Closed loop circulation can be used for materials that are contaminated or for conditions that require solvent recovery.
5. Low operating costs: low-speed mixing and reasonable structure, minimal wear and tear, and low maintenance costs.
6. Stable operation: Due to the special compression expansion stirring effect of the wedge-shaped blade, the material particles are fully in contact with the heat transfer surface. In the axial range, the temperature, humidity, and mixing degree of the material are very small, thereby ensuring the stability of the process.

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