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In the pulping process of paper making Trommel Screen machine is used for reject handling and fiber recovery from pulp slurry containing lite particles larger than 8-10mm rejected by the secondary screen after pulper. Trommel Screen is typically installed in the initial stages of the process to remove non-fiber particles like plastic and other contaminants from the pulp mixture ensuring no loss of valuable fiber.
The main component of the trommel screen is a cylindrical drum, usually made of steel or stainless steel. The drum is mounted horizontally or inclined at an angle. It rotates on its axis driven by a motor or gearbox.
The drum is perforated with holes or slots of customised sizes. The hole diameter and pattern choice depend on the desired classification and separation efficiency. The size of the perforations determines the maximum particle size that can pass through the screen. The helical Screw of same length as Perforated Screen is welded to an inner diameter of the perforated Screen drum. As the drum rotates in a circular motion, the material inside the drum moves forward with Crests of helical screws.
Trommel Perforated Screen
The drum is supported by a sturdy frame or chassis, typically made of steel. It provides structural integrity and stability to the Trommel Screen.
The drum is supported by a series of support rollers or trunnions, which facilitate the smooth rotation of the trommel screen. These rollers are often adjustable to maintain proper tension and alignment of the drum.
A motor or gearbox is used to provide rotational motion to the drum. The drive system should be capable of controlling the rotation speed and direction of the Trommel Screen machine as needed.
The spray system consists of multiple high-pressure water showers mounted inside the Perforated screen drum is a potion in that all the large-size particles get washed efficiently leaving fiber to water.
In Paper Manufacturing, the Trommel Screen machine is mostly used in recycled paper mills. The recycled paper as raw material contains plastics and tapes, a lite material called Lite Rejects in Paper Manufacturing Process.
The plastic lite particles get rejected from secondary screens and the pulp slurry goes through acceptance for further process. Fibrous materials, which are valuable for sustainable manufacturing also must be on the lite particles rejected. Hence the fiber must be recovered from this rejection before it is removed from process. The Trommel Screen is designed for fiber recovery from lite particles.
Trommel Screen Pulper Cleaning Systeam
Reject from the secondary screen is an inlet to Trommel Screen. In cylindrical drum lite reject material get efficiently washed due to water spray from high-pressure showers and Cataract motion of particles in drum due to its circular motion.
The Perforated Screen drum is also can installed in a Inclined position keeping its inlet in a lower position and reject it to the higher position, this mechanism insures that lite material washed efficiently and for a sufficient time.
Parason Trommel Screen at Stark Ridge Paper Mill JharkhandWhile the lite reject is being washed, due to the circular motion of drum helical screw, it directs the lite particles towards the reject end of the Trommel Screen this reject is final reject containing plastics and other non-fibers particles finally dropped out from the pulping process. While the fiber on lite reject goes to the accept of trommel with water through the holes or slots of Perforated Screen drum. The accept from Trommel Screen, which is of a low pulp consistency goes back to pulper chest for further process.
By employing the Trommel Screen machine, up to 10% of Fiber can be recovered from reject of a Secondary Screen in Pulping loop of Recycled Paper Manufacturing.
In mining and mineral processing operations, Trommel Screen machine play a crucial role in material classification, separating valuable minerals from waste rock, and preparing ores for subsequent stages of processing.
Trommel screen machines are extensively used in waste management and recycling facilities. It efficiently separates different types of waste materials, such as plastics, paper, glass, and metals, facilitating recycling processes and reducing landfill waste.
Construction and demolition sites generate substantial amounts of debris and waste materials. Trommel screen machines aid in sorting and segregating these materials, allowing for efficient recycling, reuse, or appropriate disposal.
In composting and organic waste processing facilities, Trommel screen machines help separate organic matter from composting materials. This ensures the production of high-quality compost by removing contaminants and achieving consistent particle size.
The Trommel Screen machine is a vital component in the pulping process of paper making, specifically in the recovery of valuable fiber from rejected pulp slurry. Its efficient design and working principle allow for the removal of non-fiber particles, such as plastics and lite contaminants, while preserving the valuable fiber for further processing. The machine’s construction, including the perforated screen drum, helical screw, frame, support structure, and drive system, ensures reliable operation and easy maintenance.
The importance of the Trommel Screen machine in the paper industry cannot be overstated. By utilizing this technology, paper manufacturers can recover up to 10%. The machine’s advantages, such as high efficiency, versatility, customization options, low maintenance requirements, and the ability to perform scalping and cleaning simultaneously, make it a valuable asset in papermaking and other industries.
Moreover, the Trommel Screen machine finds applications beyond the paper industry. Its working principle is utilized in mining and mineral processing operations for material classification, waste management and recycling facilities for waste separation, construction and demolition sites for debris sorting, and composting and organic waste processing facilities for organic matter separation. These diverse applications showcase the versatility and effectiveness of the Trommel Screen Machine in various industries. Overall, the Trommel Screen Machine is a reliable and efficient solution for screening, separating, and recovering valuable materials. Its widespread use in paper-making and other industries demonstrates its effectiveness in optimizing processes, reducing waste, and promoting sustainable practices. With ongoing advancements and innovations, the Trommel Screen Machine continues to play a significant role in enhancing productivity and environmental stewardship across different sectors.
From basic questions to complex compliance inquiries about the Trommel Screen Machinery, we’re here to help you. Contact us today!
Paper Mill Plant Related Machinery List –
Pulping, Cleaning, Screening, Dispersion System, Deinking, Thickening, Refining, Deflaker, Agitation, Reject-handling, Effluent Treatment Plant, Headbox
Efficiency and productivity are vital in the world of waste reduction—especially in the wood waste recycling market. To optimize your horizontal grinder’s performance and your operation overall, incorporating supporting equipment from a trusted manufacturer is key.
Let’s delve into three significant benefits your grinder can reap from a supporting trommel screen.
#1: Increase End Product Consistency
Integrating a trommel screen into your horizontal grinding operation presents a significant advantage by reducing the need for double grinding. Double grinding occurs when irregularly sized material passes through the grinder multiple times. This results in inconsistent material sizes, something that can be problematic for operations trying to meet the demanding size specifications of their industry.
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By incorporating a trommel screen, operators can bypass this issue and achieve more consistent, uniform final end product sizes. The trommel screen acts as a highly effective size separator, sorting out overs that may require a second pass from similarly sized material that is ready for the next stage of processing or bagging.
This saves your operation time and ensures only oversized material needs to pass through the grinder again. The result is a more streamlined and efficient workflow that minimizes double grinding.
Minimize Fines
Rotochopper’s trommel screens can help minimize the inclusion of fine materials in your end product. The screen’s rotating drum effectively separates the ground material based on size. The sorted fines can be discarded or sold as a secondary product for use in compost, wood flour, or wood pulp production.
Consistent Color
Like Rotochopper’s patented horizontal grinder screen change system, changing the screen on your trommel is quick and easy. For operators looking to produce high-quality colored landscaping mulch or playground chips with the MT 175, the screen can be swapped with a solid drum and paired with our colorizer system. The drum angle can also be hydraulically adjusted to ensure consistent color throughout your end product.
Adding a trommel screen to your horizontal grinding operation ultimately improves the overall quality of your end product and enhances the efficiency of your wood waste recycling operation.
#2: Minimize Equipment Wear and Tear
The trommel screen reduces the amount of wood waste that requires a second grind, which, in turn, minimizes the strain on your horizontal grinder’s components, including teeth, screens, and bearings. As a result, operators can reduce maintenance costs and downtime associated with frequent wear part replacements.
Rotochopper MT trommel screens are also completely compatible with our supporting technology, RotoLink®, which can help reduce wear on your trommel screen itself. The RotoLink remote monitoring system allows operators to access real-time telematics—any time from anywhere. With access to information on wear part lifespan, maintenance needs, and machine health, you can count on increased uptime, improved reliability, and a longer operational life for your equipment.
#3: Reduce Operational Costs
Incorporating supporting equipment like a trommel screen into your grinding business improves operational efficiency and offers significant cost-saving benefits. One of the primary cost-saving factors is the reduction in processing time.
The trommel screen effectively separates the desire-sized end product early, allowing some material to bypass the grinder and proceed directly to the next stage. This streamlined material flow minimizes the need for multiple passes and translates into substantial time savings, enabling you to process more material in less time and increase overall productivity.
Eliminate Inefficiencies
As previously mentioned, Rotochopper’s trommel screens are compatible with RotoLink. Along with maintenance needs, RotoLink can monitor production rates, uptime, and machine performance, allowing operators to spot and easily correct inefficiencies in their workflow.
The hydraulically foldable conveyors on the MT series trommel screens can also help reduce unnecessary material handling, further minimizing your operation’s labor or equipment costs.
Lower Fuel Costs
Using a trommel screen can lead to lower fuel consumption. By reducing the amount of unnecessary grinding, you optimize fuel efficiency and minimize energy waste. This lowers operational costs and contributes to a more sustainable and environmentally friendly operation.
Fines Reduction
The trommel screen’s reduction of fines lowers the weight of your end product, making it more cost-effective to bag and transport. If your operation is producing colored mulch, the exclusion of fines additionally reduces the amount of colorant needed, further cutting costs.
Reduced double grinding and reduced production of fine materials also result in less wear and tear on the grinder’s components, leading to decreased maintenance and replacement costs over time. These savings can positively impact your bottom line while you maintain high-quality output.
Optimize Your Grinding Operation With Rotochopper
Incorporating supporting equipment, specifically a trommel screen, into your grinder setup brings undeniable benefits to your wood waste recycling operation. If you’re interested in exploring how our MT series trommel screens can benefit your wood waste horizontal grinding operation, contact Rotochopper today.
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