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What is a paper machine?

Views: 4     Author: Site Editor     Publish Time: 2022-04-25      Origin: Site

The paper machine is a complete set of equipment that makes the pulp form the paper web, including the headbox, wire section, press section, drying section, calender, paper reel, as well as the main engine such as the transmission section and steam, water, vacuum , lubrication, heat recovery and other auxiliary systems. The wire part that forms the wet paper web is the core of the paper machine, so the paper machine can be divided into fourdrinier wire paper machine, clip wire paper machine and rotary wire paper machine according to the structure of the wire part.

The headbox is a device that uniformly and stably sends the slurry of appropriate concentration to the net through the pulp distributor, rectifier, weir tank, weir plate nozzle and other components, also known as the head box; the slurry is sprayed from the headbox to the copper After the wire, the wet paper sheet is formed on the wire part and dehydrated; after that, the pressing, that is, the moisture of the wet paper sheet from the wire part is mechanically squeezed out, the dryness of the paper sheet is improved, and the surface properties of the paper sheet are improved at the same time. , eliminate the net marks and increase the smoothness, tightness and strength; then enter the drying section to further dehydrate the wet paper sheet after pressing, so that the paper sheet shrinks, the fibers are tightly combined and the strength is increased.

After the paper sheet coming out of the drying section is calendered by the calender, the smoothness, gloss and tightness of the paper sheet can be improved, the thickness of the paper sheet can be uniform across the whole width, and the air permeability can be reduced; The web is rolled into a paper roll, that is, the main process of papermaking is completed. In order to meet different needs in the future, there are also super calenders, rewinders, paper cutters, etc. after the reel in the paper workshop.

The paper industry consumes a lot of raw materials, water, electricity and chemicals, and produces a lot of waste water and waste residue. Therefore, the future of papermaking machinery will develop towards the use of a wide range of papermaking raw materials, reducing material and energy consumption in the papermaking process, and reducing environmental pollution.


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