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Method for dewatering double sides of asbestos-free papermaking plate

A technology of latex copy board and double-sided dehydration, which is applied in textiles and papermaking, papermaking, paper machine wet end, etc., can solve problems such as difficulty in dehydration, achieve high water filtration performance and ensure uniformity

Active Publication Date: 2012-12-19
南阳国宇实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a method for double-sided dehydration of asbestos-free latex sheet, which can realize double-sided dehydration of the pulp in the wire section of the paper machine, and can solve the problem of pulp dehydration in the paper machine. The problem of difficult dehydration in the wire section enables continuous production of asbestos-free sheet, greatly improving production efficiency and reducing production costs

Method used

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  • Method for dewatering double sides of asbestos-free papermaking plate

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specific Embodiment 1

[0021] Below, in conjunction with accompanying drawing and specific embodiment, the present invention is described further:

[0022] refer to figure 1 , the double-sided dehydration method of a kind of non-asbestos latex sheet of the present invention, at first put non-asbestos fiber into water to disperse, after adding filler and beating, add coloring agent, latex, vulcanizing agent, anti-aging agent according to formula requirement, mix uniform; then send the uniformly mixed slurry into the paper machine wire flow delivery system, and the slurry passes through the pulp pump and pressure screen;

[0023] The method also includes the steps of:

[0024] 1) After the slurry leaves the pressure screen, add polyacrylamide (PAM) and bentonite to the slurry; the amount of polyacrylamide added is 0.05% of the mass of asbestos-free fiber, and the amount of bentonite added is asbestos-free 0.25% of fiber mass;

[0025] 2) The slurry enters the headbox for slurry distribution and rec...

specific Embodiment 2

[0032] The characteristics of this embodiment are: in step 1), the addition amount of the polyacrylamide is 0.04% of the mass of the asbestos-free fiber, and the addition amount of the bentonite is 0.2% of the mass of the asbestos-free fiber; other and specific examples 1 is the same.

specific Embodiment 3

[0033] The characteristics of this embodiment are: in step 1), the addition amount of the polyacrylamide is 0.06% of the mass of the asbestos-free fiber, and the addition amount of the bentonite is 0.3% of the mass of the asbestos-free fiber; other and specific examples 1 is the same.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F1/82
Inventor 王虎栓彭涛亓明海杨克刘毅李岩王希敏
Owner 南阳国宇实业有限公司
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