Starch preparation system for papermaking

Abstract

The invention discloses a preparation system of starch for papermaking. The preparation system comprises an upper control computer, an unprocessed starch storage tank, an alkali liquor adding assembly, a starch dissolving tank and a starch cooking tank, and the unprocessed starch storage tank is connected with the starch dissolving tank through a first starch conveying pipe, and a first control valve is arranged on the first starch conveying pipe. The preparation system has the advantages that the upper control computer is electrically connected with the second control valve, and when the PH value, collected by the second control valve, of the starch solution is smaller than a set threshold value, the alkali liquor adding assembly is started to add alkali liquor to the starch dissolving tank. By applying the technology, acidification of surface sizing finished paper can be reduced, generation of peculiar smell of the finished paper is reduced, regulation and control of the pH value of a starch preparation system are achieved, meanwhile, the recovered glue solution has certain adjustment on the pH value of the pulp, and great help is provided for improving the product quality.

Description

technical field [0001] The invention relates to the field of papermaking, in particular to a starch preparation system for papermaking. Background technique [0002] In the production process of container board paper, surface sizing is an indispensable link to ensure the strength and water resistance of paper. The sizing material is mainly dissolved by starch, steamed and glued to the paper surface by sizing machine, but starch is generally acidic. The longer the storage time, the higher the degree of acidification. During the papermaking process, customers pay more attention to the smell of cartons. Obviously, the sour taste of paper is unacceptable to customers. [0003] The pH value of the starch preparation system for papermaking cannot be adjusted, and the powder recovery is chemically or biologically degraded during the water cycle and cannot be used, which reduces the utilization efficiency of starch. Contents of the invention [0004] The technical problem to be s...

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Problems solved by technology

[0002] In the production process of containerboard paper, surface sizing is an indispensable link to ensure the strength and water resistance of the paper. The sizing material is mainly dissolved by starch, steamed and glued to the paper surface with a sizing machine, but starch is generally acidic. The longer the storage time, the higher the degree of acidification. During the papermaking process, customers pay special attention to the smell of cartons. Customers cannot accept the obvious sour taste of paper.

[0003] The pH value of the starch preparation system for papermaking cannot be adjusted, and the powder recovery is chemically or biologically degraded during the water cycle and cannot be used, which reduces the utilization efficiency of starch

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