Regenerative case paper board sludge reuse method

A technology for producing sludge and sewage, which is applied in the field of papermaking, and can solve problems such as the inability to reuse activated sludge, pollute white water of paper machines, sticky felts, etc.

Inactive Publication Date: 2018-02-16
嘉兴市博莱特纸业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method provided by this patent application cannot actually reuse the recycled boxboard, especially the activated sludge in the papermaking sludge, which will cause problems such as sticking rollers and felt sticks during recycling, and will pollute The white water of the paper machine has a peculiar smell in the paper and produces a lot of foam, which affects the dehydration of the wire part

Method used

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  • Regenerative case paper board sludge reuse method
  • Regenerative case paper board sludge reuse method
  • Regenerative case paper board sludge reuse method

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Main sources of sludge: soaking waste paper pulping wastewater in the papermaking process, pulp rinsing wastewater, and wastewater discharged in the papermaking process.

[0025] Sewage water quality: pH: 6.5-7.0, COD: 2020mg / L, BOD: 1080mg / L, SS: 1640mg / L.

[0026] The waste water in the production process of the boxboard is removed by the grid to remove the suspended matter, and then the fibers filtered by the inclined screen 1 are directly transported to the pulping pre-processing pool after being passed through the stirring device. 10g / m3 of polyethyleneimine was put into the water for stirring reaction for 30 minutes, and then PAC was put into it for coagulation reaction, and the input amount of PAC was 10g / m3 of water. After being filtered by inclined screen 2, it enters the primary sedimentation tank for sedimentation for 2 hours, and the generated sludge is discharged into the sludge tank at a discharge rate of 50 tons / hour, and then discharged into the A / O tank...

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PUM

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Abstract

The invention belongs to the field of papermaking, and in particular relates to a method for reusing sludge from recycled boxboard. Pool, inclined net 2, primary settling pool, A / O pool 1, secondary settling pool, A / O pool 2, final settling pool and then discharged into the clear water pool. The treated sewage is normal in various indicators and can be recycled. Step 2: Discharge the sludge in the primary settling tank, the secondary settling tank and the final settling tank into the sludge tank, and the sludge in the sludge tank passes through the inclined mesh 3 in turn, and then enters the pre-pulping pool and is mixed with the good pulp. Enter the paper machine to make paper. Using the technical scheme of the present invention, the sludge can be completely reused and zero discharge can be realized.

Description

technical field [0001] The invention belongs to the field of papermaking, and in particular relates to a method for reusing sludge from recycled box boards. Background technique [0002] Papermaking sludge is actually fine fibers and fillers in papermaking wastewater. Recently, with the promotion and application of surface glue technology, cornstarch, tapioca starch, synthetic starch, etc. have been used in large quantities, resulting in a significant increase in national waste OCC fillers and a significant concentration of papermaking wastewater. Although some papermaking enterprises have tried to reuse sludge for papermaking, it is difficult to control the amount of sludge generated, mildew, blackening and odor, etc., which directly leads to the serious impact of reuse on the speed and speed of paper machines. As for the quality of finished paper, many enterprises have failed to achieve 100% recycling, especially activated sludge. At present, most papermaking enterprises ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F11/12D21H17/01C02F103/28
CPCC02F9/00C02F1/001C02F1/52C02F1/5245C02F1/5263C02F1/56C02F3/30C02F3/34C02F11/121C02F2103/28C02F2203/006C02F2301/08D21H17/01
Inventor 王建平黄鹏程陈林忠
Owner 嘉兴市博莱特纸业股份有限公司
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