A white water treatment system for a paper machine wire press section spray water

By introducing clean water pretreatment, ultra-high pressure liquid supply, water quality stabilization, zoned spraying and recycling units, and intelligent control into high-speed paper machines, the problems of fabric clogging and uneven cleaning in high-speed paper machines have been solved, achieving efficient recycling of spray water and improved production stability.

CN122166954APending Publication Date: 2026-06-09JIANGSU LEE & MAN PAPER MFG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU LEE & MAN PAPER MFG
Filing Date
2026-03-23
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In modern high-speed paper machines, the forming wire and press blanket are easily clogged by impurities such as fine fibers, adhesives, and twigs, resulting in uneven dewatering performance, longitudinal stripes on the paper, and paper breaks that cause machine shutdowns. Traditional high-pressure spray cleaning devices are prone to clogging, consume a lot of clean water, breed bacteria, and cannot be cleaned online without stopping the machine, thus affecting production efficiency.

Method used

It employs a clean water pretreatment unit, an ultra-high pressure liquid supply unit, a water quality stabilization unit, a zoned spraying unit, a recycling unit, and an online cleaning unit, combined with an intelligent control unit, to achieve purification, pressurization, stabilization, cleaning, and recycling of spraying water. Through high-precision filtration, chemical dosing, vacuum suction, and cationic passivating agent spraying, it ensures the cleanliness of the spraying water and the protection of fabrics.

Benefits of technology

It achieves efficient recycling of spray water, reduces clean water consumption and wastewater discharge, improves dewatering efficiency and production stability, extends equipment life, improves paper dewatering uniformity and product quality, and increases production efficiency.

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Abstract

The present application belongs to the field of papermaking industry water treatment and clean production, especially to a white water treatment system suitable for the spraying water of the wire section and press section of a paper machine, which comprises: a clean water pretreatment unit for high-precision filtration of clean water to remove suspended solids and particulate impurities in the water and ensure the cleanliness of the spraying water; a high-pressure liquid supply unit connected with the clean water pretreatment unit for pressurizing the pretreated clean water to ultrahigh pressure and secondary precision filtration to provide a stable high-pressure cleaning water source; a water quality stabilization unit connected with the high-pressure liquid supply unit for adding a compounded agent to the high-pressure spraying water and real-time regulation and control of the water quality to inhibit bacterial growth and scaling corrosion; and a partition spraying unit connected with the high-pressure liquid supply unit for ultrahigh-pressure precision cleaning of the forming wire and press felt of the wire section and press section of the paper machine. The present application provides a high-integration, recyclable, energy-saving and consumption-reducing spraying water white water treatment system.
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