Drum Scream

In the paper industry, the Drum Screen is an indispensable and crucial piece of equipment primarily utilized for the meticulous screening and profound purification of pulp. Its core function lies in precisely separating the fiber components that meet specific size, shape, and quality standards from the pulp mixture while efficiently eliminating various impurities such as sand grains, fiber bundles, plastic fragments, stickies, and overly large or small fiber segments. Through this screening and purification process, the purity and uniformity of the pulp are significantly enhanced, providing a high-quality and consistent raw material basis for the subsequent papermaking processes, thereby robustly guaranteeing the quality and performance of the final paper products.

Used to treat coarse and big impurities from waste paper breaking system. Optimized screw blades and shower system can ensure high-purity impurities and small fiber loss.High screen efficiency and large equipping capacity.

1.Rotational Screening
The drum of the Drum Screen rotates at a stable and uniform speed continuously. When the pulp is introduced into the interior of the drum, due to the interaction of centrifugal force, gravity, and the flow characteristics of the pulp itself, the fibers and impurities in the pulp present complex yet orderly movement trajectories within the drum.

The fine fibers and minute impurities that comply with the preset sieve pore size can smoothly pass through the sieve pores under the combined effect of gravity and centrifugal force and fall into the collection device below. Meanwhile, the larger impurities, such as fiber bundles and plastic pieces, as well as oversized fibers that do not meet the requirements, being unable to pass through the sieve pores, are intercepted within the drum and gradually move forward as the drum continues to rotate, eventually being discharged from a specific outlet.

2.The Role of Internal Structure
The interior of the drum is typically elaborately equipped with spiral guide plates, raised structures, or special textures. These internal structures play significant guiding and auxiliary roles during operation, helping to more effectively direct the flow direction and speed distribution of the pulp.

Enabling the pulp to make more uniform and thorough contact with the sieve surface, avoiding local accumulation or poor flow conditions, thereby significantly enhancing the screening effect and improving the efficiency and precision of the screening process.
 

1.Drum
Generally fabricated from high-strength, wear-resistant, and corrosion-resistant stainless steel materials. The surface of the drum is evenly distributed with elaborately designed sieve pores, and the size, shape, and arrangement of the sieve pores are precisely customized based on specific screening requirements and pulp characteristics.
The edges of the sieve pores are usually subjected to special treatments to prevent wear, deformation, or clogging during use, ensuring long-term stable screening performance.

2.Drive Unit
Comprises a high-performance motor, precise speed reducer, and reliable transmission components such as belts, chains, or gears. This drive system collaborates to provide a powerful and stable power source for the rotation of the drum.
Simultaneously, through an advanced control system, precise adjustment and stable control of the rotational speed can be achieved to adapt to the requirements of different pulp characteristics and production processes.

3.Feed and Discharge Ports
The design of the feed port takes full consideration of fluid dynamics principles to ensure that the pulp can enter the drum interior in a uniform and stable manner, avoiding phenomena such as impact, splashing, or local high concentration.
The discharge ports are divided into the good pulp outlet and the tail pulp outlet. The good pulp outlet is used to discharge the qualified fiber pulp after screening, and its position and structural design aim to ensure the smooth outflow of the good pulp, reducing resistance and turbulence. The tail pulp outlet is used to collect the tail pulp containing impurities for subsequent processing or recycling.

4.Support and Fixing Devices
Composed of a sturdy metal frame, base, and supporting components, it is used to bear the weight of the entire Drum Screen and provide stable support and fixation during the operation of the equipment.
These support and fixing devices typically undergo strict mechanical calculations and structural optimizations to ensure they can withstand the vibration, impact, and load changes of the equipment, while guaranteeing the stability, safety, and accuracy of the equipment during operation.
 

1.Efficient Screening

Possesses a strong processing capacity and is capable of rapidly handling a large volume of pulp within a unit time. Its efficient screening mechanism and optimized internal structure enable the pulp to undergo a sufficient screening process in a short period, significantly enhancing production efficiency and meeting the demands of large-scale papermaking production.

2.High-Precision Screening

Through the adoption of high-precision sieve pore manufacturing techniques and advanced screening technologies, extremely precise separation of fibers and impurities can be achieved. The size and shape of the sieve pores exhibit good consistency, ensuring the accuracy and stability of the screening results.

Simultaneously, the internal flow control and guiding structures further optimize the screening process, allowing only fibers that meet the requirements to pass through the sieve pores, thereby providing highly consistent pulp raw materials for the subsequent papermaking processes.

3.Low Energy Consumption

The overall structural design is reasonable, featuring low operating resistance and high transmission efficiency. The drive system employs energy-saving motors and efficient speed reducers, capable of providing sufficient power while minimizing energy consumption to the greatest extent.

Additionally, the optimized screening process and reasonable rotational speed control also avoid unnecessary energy waste, endowing the equipment with outstanding energy-saving performance during operation, contributing to the reduction of production costs and environmental burdens.

4.Stable Operation

Boasts a robust and durable mechanical structure and a reliable transmission system. The manufacturing process of the drum is exquisite, ensuring its balance and stability during high-speed rotation. The transmission components undergo strict quality inspection and selection, capable of withstanding long-term working loads and impacts.

Simultaneously, the advanced control system can monitor the operating status of the equipment in real-time, promptly adjust parameters, and avoid issues such as abnormal vibration and overheating, thereby ensuring the equipment can operate stably for an extended period, reducing downtime due to faults, and enhancing production efficiency and equipment utilization.

1.Operating Key Points

Operators need to possess extensive professional knowledge and experience, being familiar with the characteristics of the pulp and the principles of adjusting operating parameters under different production requirements.

During the operation process, based on the characteristics of the pulp such as concentration, fiber length, and impurity content, the feed rate should be reasonably adjusted to ensure the pulp enters the Drum Screen uniformly and stably, avoiding insufficient screening caused by excessive feed rate or low production efficiency due to slow feed rate.

Precise control of the rotational speed of the drum is one of the critical operations. An overly high rotational speed may lead to excessive fiber damage and energy waste, while a too low rotational speed may affect the screening effect. Operators need to adjust the rotational speed to the optimal range based on the actual situation through the control system to achieve efficient and high-quality screening.

Pay close attention to the operating status of the equipment, including indicators such as sound, vibration, and temperature, promptly detect and handle possible issues such as clogging, slurry leakage, and abnormal noise. For minor clogging, it can be addressed through brief reverse rotation or appropriate flushing; for severe clogging or other faults, the equipment should be immediately shut down for maintenance.

2.Maintenance Work

Regular comprehensive inspection and cleaning of the drum is an important part of the maintenance work. Use professional tools and methods to remove clogging materials, fiber residues, and impurity accumulations on the sieve pores, ensuring smooth and precise screening.

Regular lubrication and maintenance of the drive unit and transmission components are crucial. Select the appropriate lubricating oil or grease and add or replace them according to the prescribed cycle and dosage to reduce wear, friction, and heat generation, and extend the service life of the components.

Checking the wear condition is a routine content of maintenance work. Carefully inspect the sieve pores on the drum surface, the internal guide structures, gears, belts, etc. of the drive components, promptly detect and replace severely worn parts to ensure the normal operation and stable performance of the equipment.

Regular inspection of the support and fixing devices of the equipment is necessary to ensure their firm connection, absence of looseness, and deformation. Simultaneously, check the stability and levelness of the foundation and make timely adjustments and repairs to prevent operational failures and safety hazards caused by equipment displacement or inclination.

1.Enhancing Paper Quality

By precisely removing impurities and poor-quality fibers, the fiber composition and uniformity of the pulp are effectively improved, resulting in superior physical properties of the produced paper.

The paper exhibits higher strength, capable of withstanding greater tensile and compressive forces, reducing the risk of rupture and damage during use. It also possesses better smoothness and flatness, enhancing the quality of printing and writing. Moreover, more uniform air permeability enables the paper to demonstrate superior performance in specific applications.

2.Optimizing Production Process

As a key link in the papermaking production line, its stable and efficient operation plays a vital role in coordinating the production rhythms of the preceding and subsequent processes and ensuring the smooth and stable operation of the entire production process.

It can promptly and effectively handle impurities and unqualified components in the pulp, providing a stable and high-quality raw material supply for the subsequent processes, reducing production interruptions and adjustments caused by pulp quality fluctuations, and improving production efficiency and product consistency.

3.Reducing Production Costs

By enhancing the utilization rate of the pulp, raw material waste and loss are reduced. Simultaneously, due to the improvement in the screening effect, the demand for chemical reagents, energy, and equipment in the subsequent processing processes is decreased.

The frequency of equipment maintenance and replacement is reduced, and the service life of the equipment is prolonged, thereby jointly reducing production costs in multiple aspects and enhancing the economic benefits and market competitiveness of enterprises.

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