Paper web sizing method and system thereof

Abstract

The invention provides a paper web sizing method and a system thereof, wherein starch paste prepared in a starch preparation workshop is sent into a paper machine supply tub and is pumped to a pressurized screen through a screw pump. After being screened by the pressurized screen, the starch paste is conveyed to an up-and-down sizing machine. An up-and-down sizing roller drives the delivery of a paper web. When the up-and-down sizing roller drives the delivery of the paper web, the starch paste is sprayed on the surface of the paper web. The sizing is realized in a spraying mode, so that the starch paste is high in concentration, non-return, greatly lowered in energy consumption, power consumption and gas consumption and low in manufacturing cost.

Description

technical field [0001] The invention relates to a sizing machine, especially a method and system for sizing paper web surface by spraying. Background technique [0002] The current paper web sizing method adopts the immersion sizing mode and the starch paste feeding system. The system includes: a starch preparation workshop 10, a paper machine supply barrel 20, a pressure screen 30, an upper and lower sizing machine 40, A coarse sieve 50 and a vibrating sieve 60 etc. (as shown in Fig. 1, 2). When sizing, the starch paste solution 80 prepared by the starch preparation workshop 10 is sent to the paper machine supply bucket 20, and the paper machine supply bucket 20 sends the starch paste solution 80 to the second application of the size machine 40 through the pressure screen 30. Between the rubber rollers 70, when the two sizing rollers 70 drive the paper web 90 to pass through the starch paste 80 between the two sizing rollers 70, at the same time the paper web 90 absorbs th...

AI Technical Summary

Problems solved by technology

[0004] Because the above-mentioned traditional method is immersion sizing, the concentration of starch paste used is low, and the water content of the paper web after sizing is high and difficult to dry.

Secondly, during normal production, the reflux flow of starch paste is large, and the reflux starch paste contains a large amount of fiber, so a vibrating sieve is required to process the fibers in the reflux starch paste. If a large amount of fiber-containing starch paste refluxes, the vibrating sieve cannot handle it. , the fiber-containing starch paste directly flows into the ditch, or the vibrating screen bypasses, and the fiber-containing starch paste directly enters the paper machine supply barrel and then enters the system again. When the fiber enters the system, the pressure screen is blocked, and the paper machine supply barrel The starch paste liquid is directly transported to the sizing machine, while the starch paste liquid clogged inside the pressure screen is bypassed and discharged to the ditch. In this way, the system continues a vicious cycle. The starch paste liquid not only loses a large amount, but also continuously causes the paper machine to break. In turn, energy consumption, electricity consumption, and steam consumption increase

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