The production of paper pulp is described as chemical pulping. Manufacturers conduct pulp cooking, pulp screening, pulp washing, and pulp bleaching to complete the whole process. So, it is obvious that the Paper Pulp Manufacturers uses multiple machines to complete the chemical pulping process.
There are various machines such as a pulp digester, disc filter, blow tank, vacuum drum, roll press and other machines as well as related parts. All these are used by paper pulp manufacturers to finish the process. These machines have advanced the traditional process of pulp making in the industry of papermaking.
Thechemical process turns wood chips or fibrous sources into a pulp of paper. Thequality of pulp making decides the quality of papers obtained. This processallows the pulp to contain hemicelluloses and lignin, which ensureshigh-quality paper.
However,depending on the working mechanisms, you can see two types of pulp makingprocess. They are-
- Continuousprocess of pulp cooking
- Batchprocess of pulp cooking
Dependingon the chosen mechanism, these machines are necessary to complete the pulpcreation process:
1.Pulp digester
Pulpdigester looks like a huge vessel, which is used for the steaming of dissolvedfibers and chemical pulping. This machine cooks multiple raw materials such asbamboo grasses, wood, and others. A chemical compound is added to react withthe raw materials to obtain paper pulp. This pulp contains cellulose mostly.
Afterthe digestion process, the pulp becomes ready for the washing bleaching beforethe process of papermaking. Manufacturers may choose between horizontal andvertical digester, depending on the required chemical pulping process.
Forthe super batch style of pulping, a vertical digester is used. This is when thedisplacement process of cooking is preferred to keep the pulp quality high andkeep the costs low.
2.Blow tank
Blowtanks are designed with carbon steel along with an additional inner layer ofantiseptic treatment. The outer body of the blow tank contains insulation tomaintain the desired temperature inside when keeping the pulp.
3.Displacement digester system or DDS
TheDDS machine is a whole system used in the process of pulp digestion. Thismachine is the latest technology used in pulp cooking. This machine is usedwhen creating wood pulp or bamboo pulp with an annual output of 50 to 300thousand tons. This machine system contains a storage tank, a separator, a blowtank, a conveyer, a heat exchanger, a digester, a foam breaker, and with filterand pump for black liquor. Along with all that, this system contains fourunits- heat exchange, cooking, separation of exhaust gas and filter for blackliquor.
Hereare the benefits of this displacement digester, for which it is used bymanufacturers:
- High-qualitypulp
- Washingfunction built-in
- Stableand reliable system
- Greatproduction efficiency
- Flexibleprocessing of pulp
- Lessconsumption of steam
- Reducedenvironmental pollution
4.Tubular continuous digester
Whenit comes to pulp making with non-wood fiber, this machine is prioritized bypulp manufacturers. This machine proves to be useful in chemi-mechanical andchemical pulping both. Sometimes, the same machine is also applied to completethe process of chemi-thermo mechanical pulp making as well as bio-mechanicalpulp making process. Wood shaving, non-wood fiber and other materialscontaining low-density are cooked perfectly in this machine. The process iscalled the wet-method of material preparation.
Hereare the advantages why manufacturers utilize this tubular continuous digester:
- Stableconsumption of steam and electricity without any peak load limitation
- Highyield of stable and coarse pulp with evenly distributed quality
- Lesspollution and flexible adjustment of liquid ratio
- Greatlevel of automation, simpler process adjustments, impressive productionefficiency.
- Continuousproduction with lesser production cost
- Reductionin the consumption of chemicals and energy
All these machines are used in the production of paper pulp and paper packaging board. Manufacturers define the process before choosing the equipment for cooking the pulp. This helps to obtain the desired quality.
FAQs
Screening Machines – With two types of screening machines i.e. Coarse screening and Fine screening ranging from high, medium, and low consistencies and includes other types of equipment like turbo separator, fractionator, fibermizer, combo scree, etc.
What are the machines used in paper industry? ›
Screening Machines – With two types of screening machines i.e. Coarse screening and Fine screening ranging from high, medium, and low consistencies and includes other types of equipment like turbo separator, fractionator, fibermizer, combo scree, etc.
What is the chemical process of pulp and paper industry? ›
Chemical wood pulping involves the extraction of cellulose from wood by dissolving the lignin that binds the cellulose fibers together. The 4 processes principally used in chemical pulping are kraft, sulfite, neutral sulfite semichemical (NSSC), and soda.
What are the different types of paper machines? ›
Paper machines are classified into the following types depending on their functionalities and types of paper manufactured. These are – Non-woven Fabric Production Mill, Tissue Mill, Kraft Paper Mill, Paper Machine, Kraft Line Paper Printing, Writing Paper, Paper/Board Machine Trim Width. etc. Paper is made from pulp.
What is a paper making machine called? ›
The Fourdrinier Machine is the basis for papermaking. There are four main sections used in the Fourdrinier Machine. In order to make paper the pulp has to be prepared from trees, which need to have the bark removed. The first section is typically known as the wet end.
What is paper pulp machine? ›
A pulping machine is an industrial machine that is used to make pulp in the paper industries. The pulp is the basic component of manufacturing paper. The pulp is soupy like material which is obtained from fiber and water. It is the mixture to form paper that separates cellulose fiber from the fiber.
What is a machine that refines pulp called? ›
The conical refiner is a machine used in the refining of pulp in the papermaking process. It may also be referred to as a Jordan refiner, after the American inventor Joseph Jordan who patented the device in 1858. Jordan patent. The conical refiner is a chamber with metal bars mounted around the inside of the container.
What is the machine used for pulping? ›
The fruit pulp making machine is composed of broken blades, propellers, rotor paddle, screen sieves, gripper, frame, transmission system, pulp collecting tank and other components. Among them, the crushing blade can crush the fruit by friction and extrusion. The screw propeller feeds the fruit into the crushing blades.
What do chemical engineers do in the pulp and paper industry? ›
You apply your knowledge of chemistry, physics, math, and engineering to design, optimize, and troubleshoot processes that produce paper, cardboard, tissue, and other fiber-based products.
What is the technology of making pulp and paper? ›
' In principle, paper is made by: 1) pulping, to separate and clean the fibers; 2) beating and refining the fibers; 3) diluting. to form a thin fiber slurry, suspended in solution; 4) forming a web of fibers on a thin screen; 5) pressing the web to increase the density of the material; 6) drying to remove the remaining ...
Pulp and paper processing equipment includes Fourdrinier machines, pulpers, digesters, refiners, chippers, chip processors, and other specialized machinery for processing pulp and forming paper webs. Typically, paper is made of wood pulp; plant, polymer, or inorganic fibers; or non-fibrous materials.
What is the machine used for paper? ›
The Fourdrinier machine used a specially woven fabric mesh conveyor belt (known as a wire, as it was once woven from bronze) in the forming section, where a slurry of fibre (usually wood or other vegetable fibres) is drained to create a continuous paper web.
How many types of machines are there? ›
Machines are broken into two basic categories, simple and complex. There are six simple machines. They are levers, wheel / axle, pulley, inclined plane, wedge, and the screw, Simple machines do a single basic function.
What equipment is used to make paper? ›
Pulp and paper processing equipment includes Fourdrinier machines, pulpers, digesters, refiners, chippers, chip processors, and other specialized machinery for processing pulp and forming paper webs. Typically, paper is made of wood pulp; plant, polymer, or inorganic fibers; or non-fibrous materials.
What is used in paper industry? ›
The process of papermaking uses raw materials including water, energy, chemicals and wood chips (1), that contain cellulose. Cellulose is the fiber component of wood, and exists naturally in most plant life. The paper mill boilers (2) produce steam for turbines (3) that make electricity for motors and pumps.
What machines are used to make tissue paper? ›
A paper machine that has a single large steam heated drying cylinder, also known as the Yankee dryer, attached with a hot air hood is used to produce a tissue paper. Paper pulp is the raw material used in the production process. To make the paper stick the Yankee cylinder is sprayed with adhesives.
What machine is used to make newspaper? ›
Newspaper printing machines are heavy-duty machines made for meeting the requirements of any newspaper house. They have offset web presses that make use of high-quality iron and steel in their manufacturing.
