Optimizing, energy saving and carbon reducing method of DCS (Distributed Control System) for papermaking

A DCS system and carbon reduction technology, applied in the field of papermaking, can solve problems such as difficulties and low output

Inactive Publication Date: 2021-04-13
GUANGXI KELIN CHENGLIN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Control of the refining process For low-speed paper machines, due to low output, the fiber can be treated well with disc refiner equipment; but for high-speed paper machines, it is very difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: eucalyptus fiber double disc mill 25 g / m 2 Mixed pulp advanced household paper

[0020] (1) The raw material is eucalyptus fiber, and the product is 25 g / m 2 For high-grade household paper with mixed pulp, the speed of the paper machine is 1500m / min, and the total refining power is set to be 150kwh / t pulp, the refining concentration is 10%, the beating current is 198A, and the optimal refining concentration is 9% when the disc refiner is started. , The core layer in the core layer slurry mixing system occupies 70% of the slurry volume, and the surface layer and bottom layer in the surface layer bottom layer slurry mixing system occupy 30% of the slurry volume.

[0021] (2) The total refining power input by DCS is set to maintain 150kWh / t pulp, and the refining method of double disc refiners in series is adopted, and the refining power distribution ratio is 9:10 and 10:9.

[0022] (3) Analysis of fiber morphology, physical properties and energy saving and...

Embodiment 2

[0025] Embodiment 2: bagasse fiber three-disc mill 38 g / m 2 Mixed pulp advanced household paper

[0026] (1) The raw material is bagasse fiber, and the product is 38 g / m 2 For high-grade household paper with mixed pulp, the speed of the paper machine is 1000m / min, and the total refining power is set to be 160kwh / t pulp, the refining concentration is 12%, the beating current is 200A, and the optimal refining concentration is 10% when the disc refiner is started. , the core layer in the core layer slurry mixing system occupies 75% of the slurry volume, and the surface layer and bottom layer in the surface layer bottom layer slurry mixing system occupy 25% of the slurry volume.

[0027] (2) The total refining power input by DCS is set to maintain 160kWh / t pulp, and the refining method of three disc refiners in series is adopted, and the refining power distribution ratio is 3:5:7 and 7:5:3.

[0028] (3) Analysis of fiber morphology, physical properties and energy saving and carb...

Embodiment 3

[0031]Embodiment 3: softwood fiber double disc mill 14 g / m 2 Pure wood pulp advanced household paper

[0032] (1) The raw material is coniferous wood fiber, and the product is 14 g / m 2 For pure wood pulp high-grade household paper, the speed of the paper machine is 2000m / min, and the total refining power is set to be 140kwh / t pulp, the refining concentration is 4%, the beating current is 195A, and the optimal refining concentration is 6 when the disc refiner is started. %, the core layer in the core layer slurry mixing system occupies 65% of the slurry volume, and the surface layer and bottom layer in the surface layer bottom layer slurry mixing system occupy 35% of the slurry volume.

[0033] (2) The total refining power input by DCS is set to maintain 140kWh / t pulp, and the refining method of double disc refiners in series is adopted, and the refining power distribution ratio is 7:9 and 9:7.

[0034] (3) Analysis of fiber morphology, physical properties and energy saving a...

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Abstract

The invention relates to an optimizing, energy saving and carbon reducing method of a DCS (Distributed Control System) for papermaking. A DCS is adopted. Firstly, according to the types of raw materials, the performance characteristics of a product, the speed of a paper machine and the like, the pulping concentration, the pulping current, the optimal pulping concentration of starting of a disc mill, the ratio of a core layer and the ratio of a surface layer to a bottom layer are reasonably controlled, and then the DCS is used for controlling different pulping power distribution and disc mill series connection modes; a pulping result is comprehensively analyzed to obtain related data; the data is fed back to the DCS control for comprehensive processing to obtain optimized data; and finally, the DCS makes adjustment according to the optimized data to control different pulping power distribution and disc mill series connection modes, and optimization, energy conservation and carbon reduction of the DCS for papermaking are achieved. Compared with the prior art, the DCS control system is comprehensively applied and optimized according to relevant characteristic parameters and consumption data of raw materials of the paper machine, so that the optimal strength performance of paper under the condition of lowest energy consumption is achieved, and optimization, energy conservation and carbon reduction of the papermaking system are achieved.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to a method for optimizing energy saving and carbon reduction of a DCS system for papermaking. Background technique [0002] The pulping and papermaking process is a complex industrial process and a highly technical work with high uncertainty, nonlinearity, correlation, large hysteresis and state incompleteness. The characteristics of the production process of papermaking enterprises are as follows: many technological processes, complex technological process and technological process; high temperature, strong corrosion, serious electric energy pollution, and serious damage to production equipment; large capacity of electrical equipment for papermaking, prone to electricity safety accidents . Therefore, according to the production process requirements of paper-making enterprises, paper-making enterprises do a good job in scientific electricity use and power-saving pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21D1/30D21H11/00D21H11/12
CPCD21D1/303D21H11/00D21H11/12
Inventor 罗佐帆谢清若黄一峰彭小玉农韦健黄恩福梁善宝
Owner GUANGXI KELIN CHENGLIN SCI & TECH
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