The pressure sieve is a pulp screening equipment in the pulp and paper industry machinery equipment.The screen drum is a cylindrical structure with holes/slots.It is usually made of stainless steel.It is an important part of the pressure screen.The entire pulp screening. (roll collection accessories)
The process isall round the sieve drum.Qualified fibers pass through the screen drum depending on the pressure difference between the inside and outside of the screen drum,the pressure pulses of the rotor blades,and the size of the screen slot to obtain a good pulp.
The quality of the screen drum directly affects the screening efficiency,screening quality and the service life of the screen drum itself.
Screen basket (roll collection accessories)
BANNOR mechanical screen drum design was considered from many aspects such as the selection of rods/processing of the drum ring/welding of the screen drum/stress relief/subsequent treatment/chrome plating of the screen drum,etc.,adopting advanced innovative technology and stable products The quality guarantees the good screening performance and longer service life of the screen drum.
Reasonable rod selection
The screen drums for different purposes are selected to match the bar type to meet the requirements of different screening procedures and concentrations.The bars are precisely coordinated to maintain consistency.The unique corrugated shape only causes tiny surface turbulence,which increases the productivity of the screen drum.
Precise cutting control
The special design of the middle drum ring(reinforced ring)ensures the strength and maximum opening ratio of the screen drum.
Maintain the verticality of the final screen slot,improve the accuracy of the final screen slot,improve the roundness of the screen drum,and ensure a more accurate rotor clearance.
Strengthen the ring
Design Features
Finished by wire cutting once,the function is to fix the bar
High precision bar/tolerance
The high-strength reinforcing ring makes the thickness further reduced and improves the opening rate of the screen drum
Good pulp side expansion guarantees lower pressure drop
Wear resistance,chemical resistance,long service life of equipment
Screen basket (roll collection accessories)
Screen basket in processing
High-strength reinforced ring reduces the chance of screen drum damage.
The precise positioning processing technology ensures the uniform distribution and spatial layout of the screen drum bars,improves the removal efficiency of impurities,and the screen slot size can be as small as 0.1mm.
Using imported high-quality rods. (roll collection accessories)
Cooperate with colleges and universities to carry out computer fluid finite element analysis, optimize structural design,and extend the service life of the screen drum.
Special welding process
Special welding and processing techniques ensure the overall strength of the screen drum and the elimination of residual stress during the welding process of the screen drum.Under the condition of high-speed rotor rotation,the bar does not fall off,the screen slot size is relatively stable,and the quality of the good pulp is greatly improved.
Strict quality inspection
The surface of the sieve drum is smooth and flat,and the silk is wiped with cotton.
No indentation (depression),deformation,foreign matter and slag inclusion on screen drum.
Visual inspection shall be carried out for all welds to ensure that they are even and free of defects such as porosity,slag inclusion,undercut,crack,crater,welding slag and incomplete fusion.
Special welding process
The follow-up treatment of screen drum mainly includes integral processing /acid passivation/electro polishing and chrome plating of screen drum.Excellent rod material can ensure thecoating thickness to reach 150-250um. (roll collection accessories)
BANNOR Machinery’s pressure screening technology is constantly undergoing technological
innovation in the field of pulping to meet customers’ different working conditions.
Screen basket (roll collection accessories)
Screen basket action
Separate impurities to ensure clean slurry
The diameter of the screen hole and the width of the screen slotdirectly affects the efficency of bulk slurry and the quality of the slury passed
The surface of the screen drum is chrome-plated to maintain the profile of the bar,reduce wear and prolong service life Using the strongest screen frame on the market,the compact design combined with the mature bar structure can obtain a larger opening area to achieve higher productivity
Lowes investment cost,longer service life-the screen frame is made of unique materials,which hasthe characteristics of wear resistance and chemical resistance,which can guarantee a longer service life
Tailor-made,according to different working conditions,choose the most suitable sieve drum
Performance characteristics of hole screen
Mainly used for coarse screening of waste paper pulp such as oCC/MOW/ONP and all kinds of primary pulp Ultra-high stability at higher pulp concentration and speed;especially suitable for broken paper and coarse screening
Different types of screen holes are available for efficient screening.The minimum screen hole diameter can be φ1.2mm
Higher hole area enables higher productivity
The greater thickness of chrome plating(150-250μm)improves the wear resistance of the screen drum and prolongs the service life of the screen drum while ensuring that it is firmly combined with the screen drum and does not fall off
Optimized the design of the spoiler,saving the screening energy consumption,improving the impurity removal rate,and avoiding the problems of kinking and winding inside the screen drum
Low equipment maintenance costs
Performance characteristics of slot screen
The screen drum adopts wedge-shaped bar design,with different bar widths,angles and shapes,so as to realize efficient screening of different pulps such as waste paper pulp,deinking pulp and various types of primary pulp.
The optimized gear cuTting process makes the uniformity of the screen gap extremely high,ensuring the accuracy of the screen drum.The minimum size of the slot can be 0.1mm.
High-current low-temperature welding process reduces welding stress and ensures the uniformity of the slot.
The greater thickness of chrome plating(150-250μm)improves the wear resistance of the bar and extends the service life of the screen drum while ensuring that it is firmly combined with the bar and does not fall off.
A variety of different types of rods can be perfectly matched with different slurry types and different process conditions,so as to achieve the requirements of efficient screening. (roll collection accessories)
Higher hole area enables higher productivity
Low equipment maintenance costs
Screen basket
Performance characteristics of screen drum in front of screen
The special rod designed for the special requirements of the conveying system has significant effects on reducing the pulse,increasing the throughput and avoiding the winding of the fiber knots
The optimized cutting technology ensures the high uniformity of the screen seam and the accuracy of the screen drum.The minimum size of the screen seam can be 0.1mm
The high current and low temperature welding technology reduces the welding stress and ensures the uniformity of the screen seam;
The greater chrome plating thickness(150-250μm)improves the wear resistance of the bar and prolongs the service life of the screen drum,while ensuring the firm combination with the bar without falling off
Higher open hole area for higher capacity
Low equipment maintenance cost
Performance characteristics of milled screen drum
Special sieve drums designed for chemicalfiber and other special fibers and special process conditions to avoid fiber bridging,fiber knot winding and paste sieve
The optimized milling process makes the screen slot more uniform and the surface smooth,which improves the throughput of the screen drum.
The greater thickness of chrome plating(150-250μm)improves the wear resistance of the bar and extends the service life of the screen drum while ensuring that it is firmly combined with the bar and does not fall off
Low equipment maintenance costs
Spare parts of hydrapulper
The impeller of the pulper is designed with advanced three-dimensional software,which can simulate the fuid operation in the running state,so as to achieve high efficiency and energy saving.
IMPELLER/SIEVE PLATE
Vokes impeller
The largest impeller produced by the company is 145m³
water crushing impeller.
Purpose/Features
Used to shred pulp board,damaged paper and waste paper.
Usedto s ereroy-saving Vokes rotor enhances the efficiency of hydraulic circulation and fiber disintegration.It can be continuously broken down and cooperated with the sieve plate to achieve energy saving and consumption reduction and improve the fiber disintegration efficiency.
Strong crushing ability,large output;easy disassembly and installation;easy maintenance.
Replaceable Blade Structure
The blade material is cast stainless steel ZG2Cr13,after heat treatment,the hardness is HRC40-45;the wear resistance is good and the service life is long;the blade is fastened on the impeller with bolts,which is easy to replace.
Larger impellers are welded with wear-resistant materials on the slurry surface to improve wear resistance.
Surfacing Wear-Resistant Material Structure
Larger impellers are welded with wear-resistant materials on the slurry surface to improve wear resistance.
Impeller/sieve plate
FSV medium concentrated hydra pulper rotor
Purpose/Features
It is mainly used for medium-concentration disintegration of cleaner materials such as wood pulp.
Energy-saving medium-concentrated rotor,the gap between the rotor and the sieve plate is adjustable.
High concentration hydrapulper impeller
Purpose/Features
Used for shredding waste paper under high concentration.The rotor adopts a combination structure of a three-headed spiral and a toothed flying knife.The oblique spiral blade and large specific surface area transfer the energy to the fiber to achieve a mild beating in a high-concentration state.The fiber is stripped of the ink without breaking the impurities.The integrally cast rotor has strong wear resistance.
Effective ink removal
Larger specific surface area reduces power consumption
Compared with the low-concentration hydraulic pulper,only one third of the water is heated,saving steam consumption
Increase the efficiency of chemical use and reduce chemical consumption under high concentration
High-concentration pulping has high production efficiency and small footprint
Impeller/sieve plate
Sieve plate
The sieve plate is made of CNC machining,special wear-resistant stainless steel,after heat treatment,the hardness can reach HRC40-45,and the service life is long.
Reasonable screen hole layout,the opening rate is up to 45%,which improves the throughput of slurry.
The service life of the sieve plate bottom knife will greatly affect the service life of the sieve plate,so the selection of the material of the sieve plate bottom knife is very important.Our bottom knife is made of wear-resistant material and heat treated by tempering.Its hardness can reach HRC40-45.
REFINER PLATES
Precautions for use of refiner plate
When moving the grinding disc,handle it gently to avoid damaging the grinding teeth.
When the grinding disc is installed,the sundries on the rotary table shall be cleaned to ensure the flatness of the grinding disc.It is forbidden to strike with heavy hammer to prevent deformation and crack.
During slurry grinding,it is strictly prohibited to operate without gaps to prevent direct friction between the grinding disc and the grinding disc,and foreign matters in slurry are strictly prohibited to enter the slurry grinder,so as not to cause the grinding disc to be toothed and broken.
When the automatic control system of the refiner is out of order,it is necessary to stop the machine immediately for maintenance and replacement,so as to avoid the impact of the grinding disc and damage of the grinding disc.
Refiner plate material
In terms of grinding disc materials,through years of res earch and cooperation with various engineering colleges and universities,our company has been cultivating materials and improving detection.According to different working conditions
Plate tooth
Refiner plates
Causes of refiner plate deviation/furrow phenomenon
Low slurry concentration
Slurry flow is small
Can’t guarantee advanced pulp before feeding
Turntable(spindle)movement is not flexible
The flakes in the inner grinding zone did not come off after the knife was retract
Unbalanced feed flow/pressure in internal and external mills
Failure to flush as required after shutdown
Unreasonable tooth shape selection
For these reasons,BANNOR Machinery will choose the appropriate and accurate grinding disc model for the customer to meet the needs of all the sections of the customer and ensure the smooth and effective operation of the refiner.
Technical Service Support
Refining is a very important process to obtain a good shape of the fiber.BANNOR Machinery has been focusing on optimizing and improving the refining system.We seek and collect the operating data and the influencing factors of the design of the grinding disc,in order to continuously improve and improve in the field of refining Innovation is more suitable for the refining needs of different
working conditions
To save energy in the paper industry,
BANNOR Machinery can also provide the following services for your factory
Replacement and upgrade of existing equipment and spare parts
Repair and reconstruction of second-hand equipment
Design and manufacture of non-standard products
Surveying,drawing processing and repair of spare parts
Professional technical service team can provide the most reasonable design plan for the optimization and upgrade of your entire production line
