Method for dewatering double sides of asbestos-free papermaking plate

Abstract

The invention discloses a method for dewatering double sides of an asbestos-free papermaking plate. The method includes the steps of (1) adding polyacrylamide (PAM) and bentonite into slurry after the slurry leaves a pressurized screen; (2) subjecting the slurry flowing into a slurry box to slurry distribution and rectification; (3) the slurry flows onto a papermaking screen with two sides sealed at a slurry outlet of the slurry box to form two an upper layer and a lower layer, wherein the lower layer is a slurry layer and the upper layer is a water layer, in the flowing process of the slurry, the water layer enters a slurry and water separation box suspended above the papermaking screen and is absorbed and discharged by vacuum water suction tubes in the slurry and water separation box, and the slurry layer penetrates the bottom of the slurry and water separation box and is dewatered by water scraping plates arranged at the bottom of the papermaking screen. By the aid of the method, double sides of the slurry can be dewatered on a screen portion of a paper making machine, the problem about dewatering difficulty of the slurry on the screen portion of the papermaking machine is solved, and continuous production of the asbestos-free papermaking plate is realized.

Description

technical field

[0001] The invention relates to a method for double-sided dehydration of asbestos-free latex sheet, specifically refers to a method for realizing double-sided dehydration of slurry used for preparing asbestos-free latex sheet in the wire section of a paper machine, belonging to the rubber industry and the paper industry the cross field. Background technique

[0002] At present, most of the asbestos-free latex paper-making boards are produced by traditional papermaking methods. First, the asbestos-free fibers are dispersed in water, and then fillers are added for beating. The raw materials are sent to the flow delivery system before the wire of the paper machine, pass through the pulp pump and the pressure screen, enter the headbox, and add retention and filter aids in front of the headbox; finally, they are dehydrated, formed, pressed, dried, and Calendering to produce non-asbestos latex sheet. Asbestos-free latex sheet is a cross field involving rubber ind...

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