Supplier sign in
Home
STAY INFORMED
Subscribe to our monthly newsletter.
Your email address will never be disclosed to any third party.
Read our privacy notice.

       

Insight
08.11.2023  |  1139x
Share this item
Allow (tracking) cookies from YouTube and Vimeo to watch videos
Lignin

Screening machines for dedusting and classification of lignin

Screening machines optimize the quality of lignin by removing impurities and dust, classifying lignin pellets by size and eliminating lumps.
Lignin is the second most common biopolymer on earth after cellulose. In the industrial processing of wood, especially in paper production, lignin is produced in large quantities as a by-product. In the past, this by-product was often burned to generate energy, but due to its chemical structure and properties, it is now used as a filler, additive, binder, reinforcing agent or adsorbent. The use of lignin in these and other applications is in line with the trend towards the bioeconomy, in which renewable, plant-based raw materials are used instead of fossil resources.

Improved lignin quality
Screening machines help improve the quality of the produced lignin and prepare it for specific applications or further processing steps:
  • Cleaning and separation: Lignin obtained from the pulping process of lignocellulosic materials may contain impurities or undesirable solid components. Screening machines can help to remove these impurities.
  • Classifying: Lignin particles may be of different sizes depending on how they were produced or processed. Screening machines can be used to classify lignin particles by size, which may be important for certain applications or downstream processing steps.
  • Avoiding lumps: In some processing steps, lignin can tend to form lumps or agglomerates. Screening machines can help break these lumps or prevent them from forming in the first place.
  • Dust removal & quality control: Screening machines can also serve as a quality control tool in lignin production by ensuring that the final product is dust-free and meets specified size requirements.

Selecting the screening machine

The best choice of a screening machine for lignin depends on the specific requirements of the process, including desired particle size, throughput, material properties and other specific criteria. The following factors should be considered when processing lignin:
  • Particle size: The desired particle size of the screened lignin determines the drive principle and mesh size of the screen. Powdery and dusty materials require precise screening with high-frequency vibrations
  • Throughput: The amount of material to be screened per time unit influences the size and type of machine.
  • Material properties: Lignin can have different properties depending on its origin and processing method, e.g. it can be moist, sticky or dusty.
  • Cleaning and maintenance: Lignin can tend to clog screens, therefore it is recommended to select a machine with an effective self-cleaning function.

Screening and dedusting

The RHEsono® screening machine from RHEWUM is extremely suitable for screening and, in particular, dedusting of lignin pellets. Its direct drive technology allows the finest particles to be effectively separated from the main product, while the automatic cleaning system ensures that the screening mesh does not become clogged even during intensive operation. RHEWUM screening machines thus ensure the quality and homogeneity of the pellets, which is essential for downstream industrial applications and processes.

Company information

More items

Building materials - sieving with finest separations Calcium carbonate is a material that originated from the remains of single-celled sea creatures over millions of years of Earth’s history.
Building materials - sieving with finest separations
Calcium carbonate is a material that originated from the remains of single-celled sea creatures over millions of years of Earth’s history. Today, it is the basis for a range of commonly used building materials, including limestone and dolomite. Finest separations up to 0.1 mm A British customer discussed with RHEWUM ways to renew an aging installation for processing calcium carbonate. Several existing sieving machines and sifters were to be replaced. Fine separations up to 0.1 mm were performed. Setting vibration during operation Machines with direct excitation of the screen fabrics were planned as the machine type. Drives for the decks on which coarser separations were to be performed were unbalanced motors. The decks for fine separations were equipped with oscillating heads that allow the vibration to be changed during operation via thyristor controllers. The machine types of choice were then RHEsono, RHEmoto and RHEfino as a combination of both types. For the task of feeding the material onto the machines, RHEside feeders with lateral feeding were used. Customer requirements were met With
11.09.2023  |  1442x  |  Product description  | 
High precision, high throughput at screening of sugar Sugar is among the most demanding screening materials. The RHEsono vibration screening machine by RHEWUM precisely separates sugar at high throughputs
High precision, high throughput at screening of sugar
Sugar is among the most demanding screening materials. The RHEsono vibration screening machine by RHEWUM precisely separates sugar at high throughputs Sugar is among the most demanding screening materials. It draws moisture, tends to agglomerate and has abrasive properties. To achieve maximum precision in separation under these conditions, vibration screening machines with direct excitation of the screening mesh are a good choice. The RHEsono vibration screening machine utilizes magnetic vibrating heads to transfer motion impulses directly to the screening mesh. The impulse can be precisely adjusted to the properties of sugar. The screening mesh begins to vibrate, the sugar is deimpacted at a high frequency, agglomeration is reduced. To counter any clogging that might nevertheless occur, the RHEsono has an additional cleaning pulse which clears the screening mesh at regular intervals. This neither interrupts the screening process, nor does the pulse negatively affect separation precision. This technology allows the RHEsono to achieve highest precision in separation at high throughputs, in this case more than
09.12.2021  |  3217x  |  Product news  | 
Increased soda production with modern screening machines from RHEWUM Sodium carbonate is difficult to screen as its hydrophilic properties cause agglomerations. RHEWUM’s high quality sieving technology increases production.
Increased soda production with modern screening machines from RHEWUM
Sodium carbonate is difficult to screen as its hydrophilic properties cause agglomerations. RHEWUM’s high quality sieving technology increases production. Soda ash is obtained from sustainable production sources, such as the processing of wood. Soda ash is an indispensable raw material in partticular for the glass industry, but also used as a bleaching agent in the chemical industry and not least in the lye of Bavarian pretzels. The demand for high-quality soda ash is high. The quality of the soda granulate is significantly influenced by the performance, and thus the quality, of the screening machine in use. Soda ash is considered to be a difficult material to sieve, which easily sticks to the screening mesh and tends to form lumps due to its hydrophilic properties. The screening mesh can quickly become clogged and the entire production come to a standstill. Thus, the reliable supply of soda ash for important industrial sectors, and with it the capacity of soda ash producing plants, depends on the screening machine. With the RHEWUM WA, RHEWUM offers a state-of-the-art screening machine with direct excitation of the
16.08.2021  |  3319x  |  Product news  | 
Gentle sieving for use in large mealworm farms In cooperation with biologists, Rhewum has developed a new screening machine for sorting mealworms. Screening mealworms poses unique technical challenges with regard to animal health and safety.
Gentle sieving for use in large mealworm farms
In cooperation with biologists, Rhewum has developed a new screening machine for sorting mealworms. Screening mealworms poses unique technical challenges with regard to animal health and safety. Rhewum joins the Food Revolution, with a newly gentle sieving developed method for use in large mealworm farms In cooperation with biologists, Rhewum has developed a new screening machine for sorting mealworms. Mealworms are gaining importance in the food industry as a sustainable source of high quality protein, and screening them in an animal friendly way poses unique technical challenges. Top quality protein Mealworms have long been regarded as unwanted additions by the food industry, but they have enormous potential for making our future more sustainable. Mealworms may not look like much, but they contain top quality protein and unlike other animals raised for meat, their impact on the environment is much less and they have few requirements for a healthy existence in accord with their needs. Increasing demand for sustainable, climate friendly alternatives to conventional animal protein means an increase in the demand for mealworms. Highly specialized sieving Mealworms
18.05.2021  |  4259x  |  Product news  | 
PORTALS
BulkSolids-Portal Schuettgut-Portal Recycling-Portal
Related
Bulkgids.nl
SIGN UP FOR OUR NEWSLETTER
Newsletter archive
Service and contact
ContactDisclaimerPrivacyAdvertising
FOLLOW US
Linked