Retrofit Approach for the Reduction of Water and Energy Consumption in Pulp and Paper Production Processes

The pulp and paper (P&P) sector is a dynamic manufacturing industry and plays an essential role in the Austrian economy. However, the sector, which consumes about 20 TWh of final energy, is responsible for 7% of Austria’s industrial CO2 emissions. This study, intending to assess the potential for improving energy efficiency and reducing emissions in the Austrian context in the P&P sector, uses a bottom-up approach model. The model is applied to analyze the energy consumption (heat and electricity) and CO2 emissions in the main processes, related to the P&P production from virgin or recycled fibers. Afterward, technological options to reduce energy consumption and fossil CO2 emissions for P&P production are investigated, and various low-carbon technologies are applied to the model. For each of the selected technologies, the potential of emission reduction and energy savings up to 2050 is estimated. Finally, a series of low-carbon technology-based scenarios are developed and evaluated. These scenarios’ content is based on the improvement potential associated with the various processes of different paper grades. The results reveal that the investigated technologies applied in the production process (chemical pulping and paper drying) have a minor impact on CO2 emission reduction (maximum 10% due to applying an impulse dryer). In contrast, steam supply electrification, by replacing fossil fuel boilers with direct heat supply (such as commercial electric boilers or heat pumps), enables reducing emissions by up to 75%. This means that the goal of 100% CO2 emission reduction by 2050 cannot be reached with one method alone. Consequently, a combination of technologies, particularly with the electrification of the steam supply, along with the use of carbon-free electricity generated by renewable energy, appears to be essential.

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Waste management from pulp and paper production in the European Union

Waste Management ◽

10.1016/j.wasman.2008.02.002 ◽

2009 ◽

Vol 29 (1) ◽

pp. 293-308 ◽

Cited By ~ 302

Author(s):

M.C. Monte ◽

E. Fuente ◽

A. Blanco ◽

C. Negro

Keyword(s):

European Union ◽

Waste Management ◽

Pulp And Paper ◽

The European Union ◽

Paper Production

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Deriving Wealth from the Dry Matter of Some Under-Utilised Plant Parts

International Journal of Scientific Research and Management ◽

10.18535/ijsrm/v8i02.pb01 ◽

2020 ◽

Vol 8 (02) ◽

pp. 293-299

Author(s):

Otoide J. E.* ◽

Ihinmikaiye, S. O. ◽

Otoide, T. F.

Keyword(s):

Carica Papaya ◽

Raw Materials ◽

Slenderness Ratio ◽

Pulp And Paper ◽

Panicum Maximum ◽

Wealth Creation ◽

Plant Materials ◽

Suitable Alternative ◽

Paper Production ◽

Production Industry

The possibility of creating wealth in pulp and paper industry from the underutilized dry matters of the leaf sheaths of the pseudostem (Musa paradisiaca and M. sapientum), leaf stalk (Carica papaya) and stems (Panicum maximum and Andropogon tectorum) have been established from the anatomical parameters and indexes (fibre lengths and diameters, lumen width, cell wall thickness, Runkels ratio, flexibility coefficient (%) and slenderness ratio) of the fibres using standard procedures. Results obtained revealed that the Runkels ratio of the fibres in the five dry matters were 0.60, 0.44, 0.40, 0.87 and 0.93 for Musa sapientum, M. paradisiaca, Carica papaya, Panicum maximum and Andropogon tectorum respectively. These values, each been less than 1 (˂ 1) recommends each of the dry matters as suitable alternative source of raw materials for pulp and paper production industry. It was recommended that these dry plant materials be henceforth harnessed as alternative sources of raw materials for pulp and paper production industry as another means of wealth creation instead of allowing them to waste and cause environmental nuisance.

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INFLUENCES OF LOCAL RESISTANCES OF TECHNOLOGICAL CHANNELS OF PULP AND PAPER PRODUCTION ON THE OPERATION OF VORTEX FLOW METERS OF WATER AND WATER SUSPENSIONS OF LOW CONCEN-TRATIONS

chemistry of plant raw material ◽

10.14258/jcprm.2019035113 ◽

2019 ◽

pp. 307-314

Author(s):

Iuriy Davydovich Alashkevich ◽

Mikhail Semenovich Lur’e ◽

Ol'ga Mikhaylovna Lur’e ◽

Aleksandr Sergeyevich Frolov

Keyword(s):

Strouhal Number ◽

Measurement Range ◽

Pulp And Paper ◽

Hydrodynamic Resistance ◽

Experiment Planning ◽

Straight Section ◽

Local Resistance ◽

Paper Production ◽

Water Suspensions ◽

Low Concentrations

The question of the features of operation of submersible vortex flowmeters of water and water suspensions of low concentrations in pulp and paper production, which are installed in process pipelines with local hydraulic resistance, is considered. It is shown that with an insufficient straight section after local resistance, an additional error appears, which appears due to the influence of local resistance (transition or retraction) on the symmetry of the velocity diagram in front of the device. This error arises due to a change in the Strouhal number (Sh) and is related to the measurement method. The Strouhal number begins to depend on both the distance to the local resistance and the fluid flow rate. Identify this relationship and is dedicated to this work. Recommendations on the length of straight pipeline sections in front of the flow meter have been developed, which can be significantly reduced by limiting the range of operating flow rates. The studies were carried out by the method of numerical simulation of hydrodynamic processes with subsequent processing of the results by the method of experiment planning. The dependence of the number Sh on the length of the relative diameter of the pipeline L/ for hydrodynamic resistance in the form of a transition is presented. This error shows that the measurement error is within 2% already with a straight section in front of the flowmeter equal to 5–7 diameters. The response surface for pipe bends (rotations) is considered at 90º from which it follows that while maintaining the length of the straight section within 5–7 pipe diameters, it is necessary to narrow the measurement range of the instruments 2.5 times.

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A Study on Fiber Characteristics of Melocanna baccifera (Roxb.) Kurz for the Suitability of Pulp and Paper Production

Indian Journal of Forestry ◽

10.54207/bsmps1000-2016-qh1dl3 ◽

2016 ◽

Vol 39 (1) ◽

pp. 27-30

Author(s):

Shardesh Chaurasia ◽

Satya Singh ◽

Sanjay Naithani

Keyword(s):

Pulp And Paper ◽

Paper Production ◽

Fiber Dimensions

Fiber dimensions of Melocanna baccifera was examined to assess their suitability for pulp and paper production. Fifty mature culms of M. baccifera were obtained from Forest of Silchar, Cachar District of Assam, India. Samples taken from the top, middle and basal portions were thoroughly mixed and used in the study.

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