Recycle process of white water of papermaking system

Abstract

The invention discloses a recycle process of white water of a papermaking system, which comprises the following steps in sequence: (1) delivering the white water generated by a papermaking mesh vat and a vacuum pump in a papermaking workshop to a collecting tank; (2) delivering the white water to a pulping workshop to be supplied to a pulper for pulping; (3) delivering sewage generated by other parts of the papermaking system to a shallow water treatment system to be treated, and delivering 80 to 90 percent of the treated sewage back to the papermaking workshop to be reused, and draining the residual sewage after the sewage meets the emission standard; and (4) pressing staple fiber waste pulp generated in the shallow water treatment system to dryness through a filter press, and packaging the dried waste pulp. By the recycle process of white water, the white water generated in different parts is treated in different ways according to the respective characteristics, thus not only the treatment cost of white water is greatly reduced, but also plant fibers in the white water is recycled to the maximum extent, and the economic benefit is further improved; and the vast majority of white water is recycled, thus the sewage discharge of papermaking enterprises is reduced, and significant social benefit and environmental protection benefit are created.

Description

technical field [0001] The invention relates to a wastewater treatment process, in particular to a papermaking system white water reuse process. Background technique [0002] The paper industry is a major water and water polluter. As long as paper is mentioned, many people think it is the source of pollution. The paper industry has indeed brought a lot of pollution, especially the pollution of water sources. At present, many paper companies have sewage stations. However, the treated sewage is basically discharged to the outside and has not been fully reused. As we all know, in order to ensure the water balance of the paper industry, the amount of sewage discharged every day must be supplemented with fresh water. Due to the discharge of sewage, the water used in the paper industry volume increased substantially. In fact, we know that the waste water released from the wire and press parts of the paper machine during the sheet forming process of plant fiber wet-process paperma...

AI Technical Summary

Problems solved by technology

Although some papermaking enterprises have recycled white water from papermaking at present, the current white water recycling process is unreasonable, and the cost of white water treatment is relatively high. For this reason, the applicant

Images