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CN-121974523-A - Fine gluing thing purification and separation system of papermaking white water

CN121974523ACN 121974523 ACN121974523 ACN 121974523ACN-121974523-A

Abstract

The invention discloses a purification and separation system for fine adhesives of papermaking white water, and belongs to the technical field of pulping and papermaking wastewater treatment. The device comprises a physical grading deslagging unit, a chemical modification treatment unit, a biological enzymolysis reaction unit and a slurry forming unit which are communicated sequentially through a first conveying pipeline, wherein a second conveying pipeline is arranged between a feed inlet of the physical grading deslagging unit and a waste slurry discharge outlet of the slurry forming unit, a white water depth filtration unit is arranged on the second conveying pipeline, and a white water reflux circulation path can be formed between the physical grading deslagging unit, the chemical modification treatment unit, the biological enzymolysis reaction unit and the white water depth filtration unit through the first conveying pipeline and the second conveying pipeline. The purification and separation system for the fine adhesives in the papermaking white water can realize the grading and accurate removal of the adhesives with large, medium and small particle sizes in the papermaking white water, and effectively solves the problem of deposition scaling of the adhesives in equipment.

Inventors

  • LI WENBIN

Assignees

  • 江苏理文造纸有限公司

Dates

Publication Date
20260505
Application Date
20260304

Claims (8)

  1. 1. A purification and separation system for fine adhesives of papermaking white water is characterized by comprising a physical grading deslagging unit (1), a chemical modification treatment unit (2), a biological enzymolysis reaction unit (3) and a slurry forming unit (4) which are communicated sequentially through a first conveying pipeline (6); a second conveying pipeline (7) is arranged between a feed inlet of the physical grading deslagging unit (1) and a waste pulp discharge outlet of the pulp forming unit (4), and a white water depth filtering unit (5) is arranged on the second conveying pipeline (7); The physical grading deslagging unit (1), the chemical modification treatment unit (2), the biological enzymolysis reaction unit (3) and the white water depth filtration unit (5) can form a white water reflux circulation path through the first conveying pipeline (6) and the second conveying pipeline (7).
  2. 2. The fine stickies purification and separation system of papermaking white water according to claim 1, wherein the physical classification deslagging unit (1) comprises a fine screening device (11) and a heat dispersing device (12), a feed inlet of the fine screening device (11) is communicated with the first conveying pipeline (6), and a discharge outlet of the fine screening device (11) is communicated with a feed inlet of the heat dispersing device (12) through the first conveying pipeline (6).
  3. 3. The purification and separation system for fine stickies of papermaking white water according to claim 1, wherein the chemical modification treatment unit (2) comprises a mixing reaction tank (21), and a plurality of auxiliary agent adding ports are arranged on the mixing reaction tank (21).
  4. 4. The purification and separation system for fine stickies in papermaking white water according to claim 1, wherein the biological enzymolysis reaction unit (3) comprises an enzymolysis tank (31), and a temperature regulation module and a PH detection module are arranged in the enzymolysis tank (31).
  5. 5. The fine stickies purification and separation system of papermaking white water as claimed in claim 4, wherein the slurry forming unit (4) comprises a forming machine (41) and a squeezer (42), and a feed inlet of the forming machine (41) is communicated with a discharge outlet of the enzymolysis tank (31) through a first conveying pipeline (6).
  6. 6. The fine stickies purification and separation system of papermaking white water according to claim 1, wherein the white water depth filtration unit (5) comprises a multi-disc filter (51) and a white water pretreatment tank (52) with a filter aid adding port arranged at the top, and a discharge port of the white water pretreatment tank (52) is communicated with a feed port of the multi-disc filter (51).
  7. 7. The fine stickies purification and separation system of papermaking white water according to claim 1, wherein a first flow control valve (61) is arranged on a first conveying pipeline (6) between the physical classification deslagging unit (1), the chemical modification treatment unit (2), the biological enzymolysis reaction unit (3) and the slurry forming unit (4), and a second flow control valve (71) is arranged on a second conveying pipeline (7) between the slurry forming unit (4) and the white water depth filtration unit (5).
  8. 8. The purification and separation system for fine adhesives of papermaking white water as claimed in claim 1, wherein a slurry pump (8) is arranged on the first conveying pipeline (6) and the second conveying pipeline (7).

Description

Fine gluing thing purification and separation system of papermaking white water Technical Field The invention belongs to the technical field of pulping and papermaking wastewater treatment, and particularly relates to a purification and separation system for fine adhesives of papermaking white water. Background Waste paper recycling is an important mode for realizing resource recycling in pulping and papermaking industry, but a large amount of adhesives are generated in the recycling process for many times, the adhesives are easy to deposit and scale in papermaking equipment and white water circulating pipelines, the pipelines are blocked, normal operation of a paper machine is affected, indexes such as breaking length and burst index of finished paper are reduced, and the quality of the finished paper is reduced. At present, the papermaking industry adopts single physical, chemical or biological methods to remove the sticky matters, the corresponding treatment device can only realize single functions, such as a pure fine screen deslagging device, a chemical adsorption reaction tank and the like, the classification and accurate removal of the sticky matters with different particle diameters can not be realized, and the treatment links lack of effective connection, the white water purification effect is poor, and the recycling rate is low. Disclosure of Invention The invention aims to overcome the defects in the prior art, and provides a purification and separation system for fine adhesives in papermaking white water, which can realize the grading and accurate removal of the adhesives with large, medium and small particle diameters in the papermaking white water and effectively solve the problem of deposition scaling of the adhesives in equipment. In order to achieve the aim, the technical scheme adopted by the invention is that the papermaking white water fine adhesive purifying and separating system comprises a physical grading deslagging unit, a chemical modification treatment unit, a biological enzymolysis reaction unit and a slurry forming unit which are communicated sequentially through a conveying pipeline I; a second conveying pipeline is arranged between a feed inlet of the physical grading deslagging unit and a waste pulp discharge outlet of the pulp forming unit, and a white water depth filtering unit is arranged on the second conveying pipeline; The physical grading deslagging unit, the chemical modification treatment unit, the biological enzymolysis reaction unit and the white water depth filtration unit can form a white water reflux circulation path through the first conveying pipeline and the second conveying pipeline. Optionally, the physical classifying deslagging unit comprises a fine screening device and a heat dispersing device, wherein a feed inlet of the fine screening device is communicated with the first conveying pipeline, and a discharge outlet of the fine screening device is communicated with a feed inlet of the heat dispersing device through the first conveying pipeline. Optionally, the chemical modification treatment unit comprises a mixing reaction tank, and a plurality of auxiliary agent adding ports are arranged on the mixing reaction tank. Optionally, the biological enzymolysis reaction unit comprises an enzymolysis tank, and a temperature regulation module and a PH detection module are arranged in the enzymolysis tank. Optionally, the slurry forming unit comprises a forming machine and a squeezer, wherein a feed inlet of the forming machine is communicated with a discharge outlet of the enzymolysis tank through a first conveying pipeline. Optionally, the white water depth filtration unit comprises a multi-disc filter and a white water pretreatment tank with a filter aid adding port arranged at the top, and a discharge port of the white water pretreatment tank is communicated with a feed port of the multi-disc filter. Optionally, a first flow regulating valve is arranged on the first conveying pipeline between the physical grading deslagging unit, the chemical modification treatment unit, the biological enzymolysis reaction unit and the slurry forming unit, and a second flow regulating valve is arranged on the second conveying pipeline between the slurry forming unit and the white water depth filtering unit. Optionally, a slurry pump is arranged on the first conveying pipeline and the second conveying pipeline. Compared with the prior art, the invention has the beneficial effects that the four core functional units of the physical grading deslagging unit, the chemical modification treatment unit, the biological enzymolysis reaction unit and the white water depth filtration unit are arranged, and the units are communicated in sequence, so that the grading and accurate removal of the adhesive can be realized. Specifically, firstly, removing the large-particle-size adhesive by a physical grading deslagging unit, then adsorbing and passivating the fine adhesive by a chemical modi