Rotor pumps are widely used in the papermaking industry.As the industry places increasing demands on refined production and energy efficiency management,rotor pumps have become the ideal choice for key applications such as starch conveying,coating conveying,sizing agent dosing,chemical metering,and papermaking wastewater treatment,thanks to their unique operating principle and excellent adaptability to working conditions.

I.Typical Media Conveyed by Rotor Pumps in the Paper Industry

Bonve Pump Industry has been deeply engaged in rotor pump technology for over two decades.Targeting the complex characteristics of papermaking media,we have continuously researched and innovated,and now offer five dedicated pump series:papermaking starch rotor pumps,papermaking coating rotor pumps,papermaking chemical rotor pumps,papermaking wastewater rotor pumps,and papermaking sizing agent rotor pumps,comprehensively covering the conveying needs for typical materials.

-Typical papermaking starch media:starch slurry,starch emulsion,starch recovery residue,etc.

-Typical papermaking coating media:calcium carbonate(with solid content up to 70%),coating(pre-coat,mid-coat,top-coat,back-coat),etc.

-Typical papermaking sizing agent media:surface sizing agent,cooked starch,spray starch,etc.

-Typical papermaking chemical media:polyacrylamide(PAM),defoamer,rosin size,filler,dry strength agent,wet strength agent,retention aid,dye,AKD,softener,etc.

-Typical papermaking wastewater and sludge media:pulping wastewater,comprehensive workshop wastewater,and chemical wastewater.

II.Advantages of Rotor Pumps in Papermaking Processes

01 High wear resistance and corrosion resistance

Rotor pumps form continuous sealed cavities between the rotating cam lobes and the pump casing,smoothly pushing the medium from the inlet to the outlet.The specially selected materials for wetted parts,combined with optimized mechanical seals,effectively resist the erosion of abrasive particles(such as calcium carbonate,fibers,sand)and chemical corrosion(from acidic or alkaline agents),significantly extending the pump's service life and reducing the frequency of spare parts replacement.

02 Online maintenance and cleaning

There is no need to disassemble pipelines or remove the pump body,nor is a special lifting device or multi-person coordination required.Only one ordinary worker is needed,using the maintenance space reserved at the front end of the pump head and the supplied special tools,to quickly complete inspection and parts replacement.This greatly shortens downtime and simplifies maintenance procedures.

03 Precise and controllable flow rate

Flow rate can be accurately controlled simply by adjusting the output speed of the geared motor,without the need for additional throttling devices.The response is rapid and the adjustment range is wide,enabling precise metering for chemical additions and coating applications.

04 Constant output pressure

When the rotor pump changes speed,only the flow rate changes proportionally,while the pressure remains stable.This stability has no adverse effect on pressure-sensitive process stages such as subsequent coating and sizing,ensuring consistent product quality.

05 Flexible selection to adapt to complex working conditions

In view of special medium properties,installation space constraints,or diverse control requirements,Bonve rotor pumps offer a rich combination of configurations(including wetted materials,seal types,drive modes,frequency control,etc.),ensuring that each working condition gets the optimal matching solution.

III.Applications of Rotor Pumps in Papermaking Processes

01 Papermaking starch conveying pump

During cooking and sizing feeding,starch exhibits characteristics such as high temperature and high viscosity,which impose high demands on conveying equipment.Bonve rotor pumps,based on their positive displacement working principle,can be selectively configured according to different material properties and working conditions.This can greatly reduce later equipment operating costs and improve production efficiency,which has earned them wide recognition and adoption by users.

02 Papermaking coating conveying pump

Papermaking coatings contain multiple chemical raw materials.Because the properties of various chemical raw materials differ,the requirements for the conveying pump also vary.Bonve cam rotor pumps employ self-developed special mechanical seals,and the wetted parts are made of special materials.This gives the pumps excellent wear resistance,low energy consumption,and fewer wearing parts during operation.

03 Papermaking sizing agent conveying pump

Sizing agents(including surface sizing agent,cooked starch,spray starch,etc.)are mostly weakly acidic and have a certain viscosity.The working conditions for internal sizing and surface sizing differ greatly,and strong shear action can easily cause demulsification of the sizing agent,affecting paper strength and sizing performance.Bonve rotor pumps are specially optimized for sizing agent applications in terms of wetted materials and seal structures.The low-shear conveying protects emulsion stability,and the output flow has low pulsation and accurate metering,meeting the requirements for quantitative feeding.This ensures safe,efficient,and consistent sizing processes.

04 Papermaking chemical conveying pump

Papermaking chemicals refer to the general term for various chemical agents and additives used in the papermaking process(such as rosin,dry strength agent,wet strength agent,sizing agent,retention and drainage aid,defoamer,etc.).Chemical addition requires high metering accuracy,and the pH value and viscosity of different chemicals vary,while the complexity of addition points also differs.Therefore,high pump performance is demanded.Bonve rotor pumps are based on application technology,with different configurations selected according to specific material properties and working conditions.They convey materials smoothly,safely,and with high efficiency.

05 Papermaking wastewater and sludge conveying pump

Papermaking wastewater and sludge contain hard impurities such as sand grains,coal slag,and paper pulp fibers,which cause severe wear on the pump.Conventional pumps require replacement of a large number of wearing parts every year,and maintenance is complicated and labor-intensive.Bonve rotor pumps have a new model specifically developed for wastewater conditions,which particularly enhances the wear resistance of wetted components,reducing maintenance costs for wearing parts.The pump is designed for simple and convenient disassembly and assembly.

Bonve pump always adheres to the philosophy of "Wholeheartedly Making Good Rotor Pumps," committed to providing global customers with customized conveying and mixing solutions. If you have technical inquiries, selection needs, case references, or other cooperation intentions related to Bonve rotor pumps, please feel free to contact us.  

Service Hotline: 0574-87588986 13586591794  

Official Website: www.bvpumps.com  

Business Email: market@bonvepumps.com  

We look forward to working with you to drive efficiency and innovation in industrial fluid transmission with precision technology.