Paper pulp bleaching device with double-layer liquid mixing disc
A pulp bleaching and mixing technology, which is applied in pulp bleaching, post-processing of cellulose pulp, papermaking, etc., can solve the problems of uneven mixing of bleaching agent and pulp, reducing bleaching efficiency, etc.
Active Publication Date: 2017-05-03
安徽永利纸业有限公司
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Problems solved by technology
In this process, high pulp concentration helps to reduce the use of bleaching solution, but pulp with too high concentration is prone to uneven mixing of bleaching agent and pulp, reducing bleaching efficiency
Method used
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[0017] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0018] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...
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The invention belongs to the field of paper pulp bleaching technical equipment, and especially relates to a paper pulp bleaching device with a double-layer liquid mixing disc. The paper pulp bleaching device comprises a machine shell; the machine shell comprises an upper-part bleaching chamber and a lower-part dilution chamber; the bleaching chamber and the dilution chamber communicate with each other through a paper pulp conveying pipeline at the middle part; the top of the interior of the bleaching chamber communicates with a paper pulp conveying pipe, and the bleaching chamber is internally successively provided with a bleaching liquid input pipe, a primary liquid mixing disc, a primary dilution liquid input pipe and a secondary liquid mixing disc from top to bottom; the paper pulp conveying pipe is correspondingly arranged above the primary liquid mixing disc; the bleaching liquid input pipe and the primary dilution liquid input pipe communicate with the outside, and the primary liquid mixing disc and the secondary liquid mixing disc are fixed with the bleaching chamber together respectively; the dilution chamber communicates with a secondary dilution liquid input pipe, and the bottom of the dilution chamber communicates with a paper pulp output pipe.
Description
technical field [0001] The invention belongs to the technical equipment field of pulp bleaching for papermaking, in particular to a pulp bleaching device with double-layer liquid mixing discs. Background technique [0002] At present, the pulping stage in the bleaching process for softwood pulp and hardwood pulp generally includes several steps of "raw material selection→cooking and separating fibers→washing→bleaching→washing and screening→concentrating or copying into pulp sheets→storage for future use", among which In the bleaching step, the uncolored pulp is treated with a bleaching agent to remove the colored substances in the pulp to improve the brightness. This process usually requires the use of special bleaching equipment for pulp bleaching. The traditional pulp bleaching tower directly uses a pulp input port and Bleaching agent inlet, the two pipes are mixed with each other to get bleached pulp. In this process, high pulp concentration helps to reduce the use of bl...
Claims
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CPCD21C9/1057
Inventor 江昊
Owner 安徽永利纸业有限公司