Water circulation system and water circulation treatment method for box paperboard production

Abstract

The invention discloses a water circulation system and a water circulation treatment method for box paperboard production. A neutral-alkaline pulping environment is formed without changing the paper strength of box paperboards, so the trend that a traditional box paperboard system is acidic is changed, and alkaline pulping causes less pollution to the environment, does not generate unpleasant smell, and is environmentally friendly. The method can improve the retention of fine components, reduce the COD of tail water and relieve the sewage treatment pressure.

Description

technical field [0001] The application belongs to the technical field of pulping and papermaking, and in particular relates to a water circulation system for producing container boards and a water circulation treatment method. Background technique [0002] In the production process of containerboard paper, the water in the pulping, flow conveying and paper machine systems is continuously circulated. In the process of recycling, affected by the raw materials, the pH value of the system shows a downward trend, and the residual starch in the waste paper Such organic substances degrade quickly in acidic conditions, causing bacteria to breed in water and produce odors. Controlling the pH value of white water and reducing the degradation rate of starch is the main control direction. If the residual starch can be kept in the system without being degraded, it will not only increase the retention rate of fine components, but also reduce the COD of workshop drainage and reduce the pre...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem that the pH value of the water environment in the production system drops and becomes acidic, which leads to the degradation of starch in the white water, a set of systems for maintaining the medium-alkaline environment of the circulating water in the pulping and papermaking production is designed, which can well maintain the circulating water in the system The medium-alkaline environment can significantly reduce the odor caused by the degradation of residual starch, improve the retention of fine components, and improve the odor of white water circulation

[0004] In the original technical solution, the pH of the system is basically maintained at around 6.0, which is relatively easy to form an acidic environment, which will cause the degradation of starch molecules in white water, resulting in the breeding of bacteria and the production of foul-smelling gases

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