The needs of pumping in the paper and pulp industry They can be quite challenging because the raw material is extremely difficult to transfer. In addition, several chemicals are used to obtain the necessary quality of the final product and the process is also significantly temperature sensitive. Maintaining all these requirements, the pneumatic pumps They are designed to be robust, durable and highly efficient.
Four main types of ingredients that are used as a raw material for cellulose
> Resíduos de papel são reciclados para fazer celulose
> A serragem é reciclada para fazer celulose
> Algodão ou outra fibra natural são usados para fazer celulose
> Troncos de árvores são os mais comumente usados para fazer polpa
> Os processos mecânicos e químicos podem ser usados para converter toras de madeira em celulose.
In the mechanical process, chopped wood logs are dumped into huge drums to remove the shell. This peeled wood is then shredded between huge swivel plates to make pulp. The pulp is then filtered to remove any strange particles.
In the chemical process, peeled wood is cut into small pieces of wood. These wooden chips are sent to large digestors to be cooked under pressure in a solution of water, sodium, hydroxide and sodium sulfate. After a few hours of pressure under pressure in this solution, wooden chips dissolve into pulp.
The pulp is then sent for crushing and compression in a process called 'beat'. Several fillings such as titanium dioxide can be added at this stage. These additives determine the color, opacity and other qualities of the finished role. Paper absorption capacity is also controlled at this stage, in a process called collage, which involves the addition of thin clay, resin or starch.
This pulp is then pumped to large automatic paper manufacturing machines. In this machine, the pulp is placed in a mobile strap of thin mesh screen. The strap pulp is compressed by a series of rollers while the suction device is used to remove excess water from the pulp.
Then, in the machine pressing section, the pulp is pressed between the rollers and the wooden felt. The paper then goes through a series of heated cylinders to remove the remaining water.
Finally, this paper is wrapped in large coils for posterior processing. The paper is smoother and compacted when passing through rolls called calendars, which give the paper the desired finish, whether matte or soft, shiny or matte. More finished in the form of chemical or pigmented coating can be added to the surface of the paper, shine can be added in a process called super calendar stratification and then the paper is cut in the desired sizes.
| Main fluids pumped into the paper and pulp industry |
| Anhydride Alquenil succinic (wing) |
| Reain coteno (AKD) |
| Alum |
| Aluminum chloride |
| Aluminum sulfate |
| Bagasse |
| Binding agent |
| Biocida |
| Black liqueur |
| Calcium carbonate |
| Calcium stearate |
| Carbon dioxide |
| Caustic soda caustic soda |
| Cellulose |
| Cellulose acetate |
| chinese clay |
| Coloring agent |
| Cor |
| Cooked starch |
| Anti-pumpean agent |
| Dispersion agent |
| Effluent |
| Glues and paste |
| Green liquor |
| Hydrogen peroxide |
| Caulino |
| Kitchen coating paste |
| Latex |
| Lemon milk |
| Low density pulp |
| Middle / High Consistency Pulp |
| Melanin |
| Mineral fillings |
| Neutral sizing |
| Optical |
| Paper mud |
| Papier -softener |
| Plastic pigment |
| Acetato de Poliacril |
| Poliacrilamida |
| Polyelelectropolite |
| Polymer |
| Polyvinila acetate |
| Polyvinyl alcohol |
| Rags / Papel lying down |
| Retention agent |
| Resin |
| Chemical sizing |
| Sodium carbonate |
| Sodium hydroxide |
| Sodium sulfide |
| Amido paste |
| Sulfate / sulfite pulp |
| Talc |
| Titanium dioxide |
| Cera |
| white paper |
