Pulp washing is a very crucial process in pulping production. It is the separation of the pulp and black liquor, and very helpful for filtration and bleaching. Pulp washer is a kind of pulp washing equipment.
Pulp washer is used for extracting black liquor from pulp. The purpose of washing is to wash the pulp and increase the extraction rate of black liquor and create conditions for chemical recovery. Therefore, the washing index has the following two points: washing degree and extraction rate.
Vacuum pulp washer
Vacuum washer is a kind of common pulp washing equipment. It is suitable for various pulps such as wood pulp, straw pulp and so on. It is key technical equipment for the paper making industry to solve the wastewater pollution and implement the alkali recovery project. It is mainly composed of drum, tank body and plane distribution valve, washing device, stripping device, screen washing device, transmission device, screw conveyor, etc. It is composed of a single unit or a group in series.
Pressure pulp washer
Pressure washer is a new type of pulp washing equipment. Its main features are: the operation under sealing and positive pressure; the adaptability to the feeding amount and concentration; not easy to fall off the screen and be stacked up; be allowable for higher washing temperature to reduce heat loss and improve black liquor temperature; not easy to produce vaporization and foam of the filtrate. It consists of a drum, a drum sealed groove, sealing rolls and an outer casing.
Displacement pulp washer
Displacement washer is an original meaning of “diffusion washer” in English, so the equipment is also called diffusion scrubber. However, with the in-depth study of the pulp washing principle, it is considered that the washing process of this equipment is completely a displacement process.
Twin roll displacement press pulp washer
Twin roll displacement press washer is a pulp washer that combines three functions of dilution, dehydration, displacement and pressing. It can effectively remove soluble solids in the pulp, reducing the bleaching chemical consumption.
Displacement drum washer
Displacement drum washer is referred to as DD washer. It is divided into multiple sections for washing on one rotary drum, and one washer can complete all washing work. It has the characteristics and advantages of vacuum washer and pressure washer.
Through the above introduction, we believe that you’ve known much relevant knowledge about pulp washing equipments. We hope that you can send your inquires for further setting up the cooperation and business with us!