Papermaking white water recovery device

Abstract

The invention provides a papermaking white water recycling device, which comprises a white water pool, the white water pool is connected with an electromagnetic ultrasonic filtering all-in-one machinethrough a vacuum pump, and a pulp outlet of the electromagnetic ultrasonic filtering all-in-one machine is connected with a recycled pulp pool; the electromagnetic ultrasonic filtering all-in-one machine comprises a machine shell with the upper end open, a disc is fixedly arranged on a main shaft; the filter disc comprises a frame fixed on the disc and a sieve sheet fixed in the frame; the filtering disc stations comprise a first filtering station, a second filtering station and a third filtering station; a fixed disc is fixed to the machine shell, a gap is formed between the lower end of thefixed disc and the bottom of the machine shell, a groove is formed in the fixed disc, the bottom of the groove is communicated with a muddy water pool, a clean water pool and an ultra-clean water pool through pipelines, an electromagnetic-ultrasonic device is installed in the machine shell, and a pulp stripping and net washing spraying device is installed on a cross beam. Through combination of electromagnetism, ultrasound and multi-stage vacuum negative pressure filtration, the fiber recovery rate is far higher than that of a traditional multi-disc filter structure, the automation degree ishigh, and operation is easy, convenient and reliable.

Description

technical field [0001] The invention relates to white water treatment and reuse technology, in particular to a papermaking white water recycling device. Background technique [0002] The paper industry consumes a lot of water, which is also one of the important sources of environmental pollution. Papermaking white water contains fibers and fillers. The direct discharge of white water not only seriously pollutes water sources, but also causes a lot of waste of resources. [0003] At present, most of the papermaking white water in domestic paper mills uses the method of closed loop recycling. The fine fibers and fillers are recycled in the entire large system, which has many disadvantages, seriously affects the product quality, and causes a great burden on water treatment. Specific problems as follows: [0004] White water contains various dissolved organic matter, inorganic matter and microorganisms. When the white water system of the paper machine is closed, the amount of ...

AI Technical Summary

Problems solved by technology

Papermaking white water contains fibers and fillers. The direct discharge of white water not only seriously pollutes water sources, but also causes a lot of waste of resources.

[0003] At present, most of the papermaking white water in domestic paper mills uses the method of closed loop recycling. The fine fibers and fillers are recycled in the entire large system, which has many disadvantages, seriously affects the product quality, and causes a great burden on water treatment. Specific problems as follows:

[0004] White water contains various dissolved organic matter, inorganic matter and microorganisms. When the white water system of the paper machine is closed, the amount of fresh water entering the system and the amount of waste water discharged will greatly reduce, and the harmful substances accumulated in the system will increase greatly. Cause water quality to drop, produce foam, produce sludge, pH value is out of control, it is difficult to sizing, produce sedimentation and dirt, block mesh and felt, increase viscosity, difficulty in drainage, etc., affect the wet end of the paper machine and paper performance

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