A sedimentation system for improving the cleanliness of surface sizing starch liquid

Abstract

The invention belongs to the field of papermaking surface sizing starch liquid filtering equipment and in particular relates to a sedimentation system for improving the cleanliness of a surface sizingstarch liquid and the circulating utilization rate of the starch liquid. The sedimentation system comprises a starch glue charging bucket which is connected with a starch glue filter; the starch gluefilter is connected with a sizing machine; and the sizing machine is internally provided with a scraping rod and a rubber roller to form a glue film on a paper surface. The sizing machine is connected with a square vibration sieve; the square vibration sieve is connected with the starch glue charging bucket; and a reflowed starch liquid is subjected to primary impurity removal through the squarevibration sieve. The sedimentation system is provided with a sedimentation tank; the sedimentation tank is provided with a feeding opening and a discharging opening; the starch glue filter is providedwith a filtering region and a centrifuging region; the filtering region is provided with an outlet for discharging thick and large impurities; an outlet is formed in an inner layer of the centrifuging region and is connected with the feeding opening of the sedimentation tank; the starch liquid containing heavy impurities enters the sedimentation tank to be treated; and an outlet is formed in an outer layer of the centrifuging region and is connected with the sizing machine to discharge good glue. The discharging opening of the sedimentation tank is connected with a round vibration sieve; theround vibration sieve is connected with the starch glue charging bucket; and after the starch liquid is treated through the sedimentation tank, the starch liquid is filtered through the round vibration sieve again and then is returned back into the charging bucket.

Description

technical field [0001] The invention belongs to the field of filtering equipment for surface sizing starch liquid in papermaking, and in particular relates to a sediment system for improving the cleanliness of surface sizing starch liquid. Background technique [0002] High-strength packaging paper has strict requirements on the strength index and water absorption performance of the paper. At present, the mainstream papermaking process will use the surface sizing system to sizing the surface of the kraft linerboard to improve the physical strength index of the paper and reduce the water absorption capacity of the paper. At present, most paper mills are using waste paper raw materials for pulping and papermaking. Due to the low quality of waste paper raw materials, high content of impurities, and high content of fine fibers, a large amount of impurities and paper wool will adhere to the surface sizing backflow glue solution during the surface sizing process of papermaking, a...

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Problems solved by technology

The system filters the glue through a multi-stage pressure sieve, and the filtering effect is limited

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