scholarly journals A Method to Reduce Steam Consumption of ECF Bleaching Based on Operation Optimizing

Processes ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 928
Author(s):  
Shaoxu Chen ◽  
Zhichao Ma ◽  
Jiang Liu ◽  
Jingjing Yang ◽  
Yongjun Yin ◽  
...  
Keyword(s):  
Paper Industry ◽  
Urgent Problem ◽  
Quality Indices ◽  
Steam Consumption ◽  
Energy And Environment ◽  
Bleached Pulp ◽  
The Cost ◽  
Ecf Bleaching ◽  
Reducing Energy

Development of paper industry has been restricted by resources, energy and environment deeply; further reducing energy consumption becomes an urgent problem to be solved. In this paper, the calculating model of steam consumption in bleaching process is established under the premise of ensuring product quality and controlling bleaching cost. Then, an optimization model for minimizing steam consumption is constructed. Compared with before optimization, the steam consumption of the optimized bleaching system reduced by 19.48% (0.5014 t/adt) at a loss of 0.11% brightness (0.1 ISO%) and 5.17% viscosity (33 mL/g). The amount of chemicals should be increased to ensure the quality of the pulp while decreasing the bleaching temperature to reduce steam consumption, the cost of bleaching pulp has decreased by 1.62% (3.19 USD/adt) after optimization. The verification experiments showed all the pulp quality indices can meet the requirements of bleached pulp.

scholarly journals Quality Classification of Injection-Molded Components by Using Quality Indices, Grading, and Machine Learning

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 353
Author(s):  
Kun-Cheng Ke ◽  
Ming-Shyan Huang
Keyword(s):  
Machine Learning ◽  
Integrated Circuit ◽  
Quality Indices ◽  
Statistical Process ◽  
Suitable Alternative ◽  
Quality Grading ◽  
Quality Of Products ◽  
The Cost ◽  
Mlp Model

Conventional methods for assessing the quality of components mass produced using injection molding are expensive and time-consuming or involve imprecise statistical process control parameters. A suitable alternative would be to employ machine learning to classify the quality of parts by using quality indices and quality grading. In this study, we used a multilayer perceptron (MLP) neural network along with a few quality indices to accurately predict the quality of “qualified” and “unqualified” geometric shapes of a finished product. These quality indices, which exhibited a strong correlation with part quality, were extracted from pressure curves and input into the MLP model for learning and prediction. By filtering outliers from the input data and converting the measured quality into quality grades used as output data, we increased the prediction accuracy of the MLP model and classified the quality of finished parts into various quality levels. The MLP model may misjudge datapoints in the “to-be-confirmed” area, which is located between the “qualified” and “unqualified” areas. We classified the “to-be-confirmed” area, and only the quality of products in this area were evaluated further, which reduced the cost of quality control considerably. An integrated circuit tray was manufactured to experimentally demonstrate the feasibility of the proposed method.

Coal blend properties and evaluation on the quality of stamp charging coke from weakly coking blends

2018 ◽  
Vol 115 (4) ◽  
pp. 421 ◽  
Author(s):  
Xue-yan Liu ◽  
Xing Han ◽  
Huan Cheng ◽  
Xi-Tao Yin ◽  
Rui Guo ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Temperature Dependence ◽  
Quality Indices ◽  
Coke Strength ◽  
Coking Coal ◽  
Iron And Steel ◽  
Coal Blend ◽  
Coking Properties ◽  
The Cost

Stamp charging coking can use weakly coking coal effectively, which can cut the cost for iron and steel enterprises. However, the quality of stamp charging coke has been debated due to lower CSR index. In this paper, the correlation between blend coking properties and quality indices of stamp charging coke is given out through statistical analysis of data from coking production, the effect of blend properties and stamping on the properties of stamp charging coke is estimated through microstructure, and the strength after reaction of stamp charging coke is evaluated through temperature dependence of reacted coke strength and BF smelting. The results show that the stamping permits to use the weakly coking blend with lower G index without impairing the M10 and M40 indices, but the CSR index is decreased. Meanwhile, the reason that the stamp charging coke with lower CSR index can also be used smoothly in BF is presented. The present works are significant to guide the blending of increasing weakly coking coal and evaluate reasonably the quality of stamp charging cokes.

The Use of Oil Palm Empty Fruit Bunches (OPEFB) Fibers as Partial Replacement for Imported Recycled Fibers

2017 ◽  
Vol 737 ◽  
pp. 335-340 ◽  
Author(s):  
A.B. Khairul Hafizuddin ◽  
Roslan Rohaizu ◽  
W.D. Wan Rosli
Keyword(s):  
Oil Palm ◽  
Paper Industry ◽  
Strength Properties ◽  
Partial Replacement ◽  
Paper Strength ◽  
Empty Fruit Bunches ◽  
Recycled Pulp ◽  
Recycled Fibers ◽  
The Cost

Papermaking in Malaysia is basically based on recycled (secondary) fibers which are sourced from various parts of the world with prices depending on the quality of the fibers procured. The costs of paper production could possibly be reduced by using local fibers as partial replacement provided that the strength requirements are not compromised; and one such type is the oil palm fibers which are obtained as the by-product of the palm oil industry. This paper reports the use of the oil palm empty fruit bunch (OPEFB) fiber as a partial substitute in the production of corrugating medium. Both unbleached and totally chlorine free (TCF) bleached OPEFB pulps were mixed in different ratios with high quality recycled pulps which had been mechanically and chemically treated. Burst strength results indicate as high as 70% recycled pulp can be replaced by OPEFB pulps yet still having strength properties that are comparable with the industrial produced corrugating medium. Although the effect of bleached pulp is significant at high addition levels of more than 70%, the cost-energy balance will not be effective to use these bleached fibers, and furthermore the utilization of unbleached pulps also gave the same desired results. The use of the underutilized OPEFB fibers for replacement of imported recycled fibers without compromising the paper strength qualities could help the Malaysian paper industry in their quest for finding fiber alternatives.

scholarly journals PENGARUH PENAMBAHAN XILANASE PADA PROSES PEMUTIHAN SISTEM ELEMENTAL CHLORINE FREE (ECF)

2016 ◽  
Vol 3 (01) ◽  
Author(s):  
Krisna Septiningrum ◽  
Susi Sugesty
Keyword(s):  
Solid Phase ◽  
Acacia Mangium ◽  
Kappa Number ◽  
Bacillus Circulans ◽  
Extractive Content ◽  
Physical Strength ◽  
Bleached Pulp ◽  
Elemental Chlorine ◽  
Ecf Bleaching

This research aims to investigate the effect of xylanase pretreatment on elemental chlorine free (ECF) bleaching process, the quality of bleached pulp and wastewater characteristics. At first, xylanase was produced from Bacillus circulans using solid-phase fermentation and then used for pre- bleaching of Acacia mangium and commercial pulp (Kappa Number of 12-16) and then bleached with D0ED1D2 bleaching sequences. The bleached pulp obtained was tested for physical and optical properties; COD and AOX content of wastewater generated were tested as well. The results showed that the xylanase pretreatment increase the brightness, physical strength (tensile and bursting index) of Acacia mangium and commercial pulp at xylanase dose of 0.5 kg/ton. The xylanase decrease the extractive content of Acacia mangium pulp but increase it at a commercial pulp. In contrary, the dirt content of Acacia mangium pulp was increase while it was decrease at a commercial pulp. These were obtained at a dose of xylanase of 0.5 kg/ton. The addition of xylanase on prebleaching process could increase the COD value but decrease significantly the AOX content in effluent.Keywords: xylanase, Bacillus circulans, pre-bleaching, Acacia mangium, ECF  ABSTRAKPenelitian ini bertujuan untuk mengetahui pengaruh perlakuan awal xilanase pada pemutihan pulp sistem elemental chlorine free (ECF), kualitas pulp putih dan pengaruhnya terhadap karakteristik air limbah yang dihasilkan. Mula-mula, xilanase diproduksi dari Bacillus circulans menggunakan fermentasi fase padat kemudian digunakan pada perlakuan awal pemutihan (pre-bleaching) pulp Acacia mangium dan pulp komersial (Bilangan Kappa 12-16). Pulp lalu diputihkan dengan urutan D0ED1D2. Pulp putih yang diperoleh diuji sifat fisik dan optiknya, sedangkan air limbah yang  diperoleh diuji kandungan COD dan AOX. Hasil penelitian menunjukkan aplikasi xilanase dapat meningkatkan derajat putih, kekuatan fisik (indeks tarik dan retak) pulp Acacia mangium dan komersial pada dosis xilanase sebesar 0,5 kg/ton. Xilanase dapat menurunkan kandungan ekstraktif pada pulp Acacia mangium namun meningkatkan kandungan ekstraktif pada pulp komersial. Hal sebaliknya terjadi pada jumlah noda pada lembaran. Jumlah noda meningkat pada pulp Acacia mangium namun menurun pada pulp komersial pada dosis xilanase 0,5 kg/ton. Penambahan xilanase pada proses pre-bleaching meningkatkan kandungan COD pada air limbah proses pemutihan yang dihasilkan namun dapat menurunkan kandungan AOXKata kunci: xilanase, Bacillus circulans, pra-pemutihan, Acacia mangium, ECF

Application Of Cusum Chart In Control Of Paper Quality

GIS Business ◽  
2020 ◽  
Vol 14 (6) ◽  
pp. 1062-1069
Author(s):  
S.Ramesh ◽  
B.A.Vasu
Keyword(s):  
Process Parameters ◽  
Manufacturing Process ◽  
Paper Industry ◽  
Primary Data ◽  
Cusum Chart ◽  
Paper Machine ◽  
Statistical Control ◽  
Operating Characteristics ◽  
Small Shift

This paper is an attempt to assess if the manufacturing process of paper machine is in statistical control thereby improving the quality of paper being produced in a paper industry at the time of process itself. Quality is the foremost criteria for achieving the business target. Therefore, emphasis was made on controlling the quality of paper at the time of manufacturing process itself, rather than checking the finished lots at a later time.  This control on quality will help the industry deduct the small shift in the process parameters and modify the operating characteristics at the time of production itself rather than receiving complaints from customers at a later stage.  This paper describes controlling quality at the time of manufacture itself and helps the industry to concentrate on quality at low cost. The researcher has collected primary data at a leading paper industry during October, 2019.  Though X-bar and Range charges were primarily used, CUSUM charts were used to sense the minor shifts in manufacturing process, to explore the possibility of adjusting process parameters during manufacture of paper.

Pengaruh Kompetensi Coder terhadap Keakuratan dan Ketepatan Pengkodean Menggunakan ICD 10 di Rumah Sakit X Pekanbaru Tahun 2016

2018 ◽  
Vol 1 (1) ◽  
pp. 31-43
Author(s):  
Nur Maimun ◽  
Jihan Natassa ◽  
Wen Via Trisna ◽  
Yeye Supriatin
Keyword(s):  
Medical Record ◽  
Human Error ◽  
Medical Personnel ◽  
Quality Of Data ◽  
Accuracy And Precision ◽  
Result Show ◽  
Study Implementation ◽  
Icd 10 ◽  
The Cost

The accuracy in administering the diagnosis code was the important matter for medical recorder, quality of data was the most important thing for health information management of medical recorder. This study aims to know the coder competency for accuracy and precision of using ICD 10 at X Hospital in Pekanbaru. This study was a qualitative method with case study implementation from five informan. The result show that medical personnel (doctor) have never received a training about coding, doctors writing that hard and difficult to read, failure for making diagnoses code or procedures, doctor used an usual abbreviations that are not standard, theres still an officer who are not understand about the nomenclature and mastering anatomy phatology, facilities and infrastructure were supported for accuracy and precision of the existing code. The errors of coding always happen because there is a human error. The accuracy and precision in coding very influence against the cost of INA CBGs, medical and the committee did most of the work in the case of severity level III, while medical record had a role in monitoring or evaluation of coding implementation. If there are resumes that is not clearly case mix team check file needed medical record the result the diagnoses or coding for conformity. Keywords: coder competency, accuracy and precision of coding, ICD 10

ABOUT NECESSITY OF MATHEMATICAL MODELING OF THE BUSINESS PROCESS OF COST ESTIMATE CALCULATIONS IN THE CONSTRUCTION OF OIL AND GAS FACILITIES

2017 ◽  
pp. 139-145
Author(s):  
R. I. Hamidullin ◽  
L. B. Senkevich
Keyword(s):  
Mathematical Modeling ◽  
Quality Assessment ◽  
Business Process ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Gas Industry ◽  
Construction Organizations ◽  
The Cost ◽  
Cost Of Construction

A study of the quality of the development of estimate documentation on the cost of construction at all stages of the implementation of large projects in the oil and gas industry is conducted. The main problems that arise in construction organizations are indicated. The analysis of the choice of the perfect methodology of mathematical modeling of the investigated business process for improving the activity of budget calculations, conducting quality assessment of estimates and criteria for automation of design estimates is performed.

Return on Invesment (ROI) of Software Product: A Systematic Literature Review

2015 ◽  
Vol 6 (1) ◽  
pp. 50-57
Author(s):  
Rizqa Raaiqa Bintana ◽  
Putri Aisyiyah Rakhma Devi ◽  
Umi Laili Yuhana
Keyword(s):  
Return On Investment ◽  
Assessment Criteria ◽  
Software Product ◽  
And Performance ◽  
Rational Consideration ◽  
Actual Return ◽  
The Cost ◽  
Investment Models ◽  
The Impact

The quality of the software can be measured by its return on investment. Factors which may affect the return on investment (ROI) is the tangible factors (such as the cost) dan intangible factors (such as the impact of software to the users or stakeholder). The factor of the software itself are assessed through reviewing, testing, process audit, and performance of software. This paper discusses the consideration of return on investment (ROI) assessment criteria derived from the software and its users. These criteria indicate that the approach may support a rational consideration of all relevant criteria when evaluating software, and shows examples of actual return on investment models. Conducted an analysis of the assessment criteria that affect the return on investment if these criteria have a disproportionate effort that resulted in a return on investment of a software decreased. Index Terms - Assessment criteria, Quality assurance, Return on Investment, Software product

Strategy for Protecting the North Sea: A Chemical Industry Perspective

1991 ◽  
Vol 24 (10) ◽  
pp. 269-276
Author(s):  
J. R. Lawrence ◽  
N. C. D. Craig
Keyword(s):  
North Sea ◽  
Chemical Industry ◽  
Important Research ◽  
The Public ◽  
The North ◽  
Anthropogenic Inputs ◽  
Seven Principles ◽  
The North Sea ◽  
The Cost

The public has ever-rising expectations for the environmental quality of the North Sea and hence of everreducing anthropogenic inputs; by implication society must be willing to accept the cost of reduced contamination. The chemical industry accepts that it has an important part to play in meeting these expectations, but it is essential that proper scientific consideration is given to the potential transfer of contamination from one medium to another before changes are made. A strategy for North Sea protection is put forward as a set of seven principles that must govern the management decisions that are made. Some areas of uncertainty are identified as important research targets. It is concluded that although there have been many improvements over the last two decades, there is more to be done. A systematic and less emotive approach is required to continue the improvement process.

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