scholarly journals Experimental study on the structure and properties of modified nonwoven filter fibers by impregnation with carbon black

2020 ◽  
Vol 15 ◽  
pp. 155892502091301
Author(s):  
Xin Zhang ◽  
Yue-sheng Fan ◽  
Huan Wang ◽  
Jiaxin Zhang ◽  
Shuxuan Wei ◽  
...  
Keyword(s):  
Carbon Black ◽  
Reference Value ◽  
Nonwoven Fabric ◽  
Filtration Efficiency ◽  
Improve Performance ◽  
Fabric Filter ◽  
Filter Materials ◽  
Black Coating ◽  
Before And After ◽  
Fiber Materials

With the increasingly serious air pollution, it is urgent to build a good indoor environment. How to improve performance of filter fiber materials has become the mainstream approach. In this article, the structure and filtration performances of nonwoven filter fibers before and after impregnation with carbon black were tested and analyzed. The results showed that a carbon black coating layer was wrapped on the surfaces of the changed nonwoven fabric filter fibers. The porosity of fibers decreased from 97.81% to 95.35%. The filtration efficiency of PM1.0, PM2.5, and PM10 increased by 16.8%, 28.0%, and 11.7%, respectively, at the best filtration velocity of 0.8 m/s. The filtration efficiency of PM2.5 had the most significant improvement. But the resistance increased by 1.18 times at the same time. The matching between filtration efficiency and resistance should be considered in using. This study provides reference value for the synthesis and application of new filter materials.

Development of polyester needle-punched nonwoven fabrics for filter press applications

2018 ◽  
Vol 48 (10) ◽  
pp. 1566-1579 ◽  
Author(s):  
G Thilagavathi ◽  
N Muthukumar ◽  
S Neelakrishnan ◽  
R Santhosh Egappan
Keyword(s):  
Nonwoven Fabric ◽  
Filtration Efficiency ◽  
Filter Press ◽  
Woven Fabric ◽  
Nonwoven Fabrics ◽  
Fabric Filter ◽  
Cake Discharge ◽  
Fibre Fineness ◽  
Filtration Properties ◽  
Filter Fabrics

This paper reports the development of nonwoven fabric by needle-punching technique for filter press application in textile effluent treatment plant. For filter press development, the nonwoven fabric was reinforced with the nylon scrim as the central layer in order to withstand the filtration pressure. The nonwoven fabrics were developed using different denier polyester fibres and changing punch density. The influence of fibre fineness and punch density on the properties of nonwovens was investigated. The filtration parameters such as filtration efficiency, dewatering efficiency, blinding tendency and cake discharge properties of the developed nonwoven filter fabrics filter fabrics were evaluated and compared with existing woven fabric filter media. The influence of calendering on the filtration properties of the nonwovens was also studied. The results showed that bursting strength of the developed nonwovens increased with increase in fibre fineness and decrease in punch density. It was also found that the air permeability of the developed nonwovens varied inversely in relation to punch density and the proportion of fine fibres. It was observed that developed nonwovens had 8% higher filtration efficiency and 6% higher dewatering efficiency compared to the existing woven fabric filter media. The blinding resistance and cake discharge properties were slightly lower than that of woven fabric filter. It was found that calendering improves filtration properties of the developed nonwoven fabrics.

A Technological Method to Improve the Filtration Efficiency of Fiber Materials

2013 ◽  
Vol 690-693 ◽  
pp. 995-998
Author(s):  
Wan Jun Fu ◽  
Wei Liang
Keyword(s):  
Filtration Efficiency ◽  
Porous Structures ◽  
Pass Filter ◽  
Removal Capacity ◽  
Filter Materials ◽  
Fiber Arrangement ◽  
Pass Through ◽  
Fiber Materials ◽  
Filter Bed ◽  
Water Passage

Fiber is a new and efficient water treatment and environmental protection material. The key to improve the filtration efficiency of fiber materials is that water pass through the fiber bed, the porous structures of fiber in-depth bed is controlled by the internal construction, fiber arrangement, and fiber zigzag degree. This study presented a method to improve the removal capacity of fiber filtration materials. There are three kinds of porous structures discovered here: Tubular water passage hole (T-pass), Curvilinear water passage hole (C-pass), Labyrinth water passage hole (L-pass). The T-pass let water more easily go through but less sediment and rush strongly off suspensions deposit on the surface of filter materials. The L-pass has resistance to flow and suspension intend to deposit at backside area of filter materials, where not advantage to rush but sediment easily. The function of C-pass is between that of T-pass and L-pass. The experiment shows that C-pass filter bed is the idea structure which can be increased the efficiency of 5-10 times than others.

scholarly journals Electrical Behaviour of a Carbon Black-Filled Polymer-Based Concrete

1996 ◽  
Vol 5 (5) ◽  
pp. 096369359600500
Author(s):  
L. Rejón ◽  
R. Flores ◽  
M. A. Ponce ◽  
V.M. Castaño
Keyword(s):  
Carbon Black ◽  
Electrical Performance ◽  
Electrical Behaviour ◽  
Filled Polymer ◽  
Carbon Black Concentration ◽  
Before And After

The electrical performance (current, I vs. voltage, V) of a novel polymer-based composite, modified with varying amounts of carbon black, was studied. Distinctive regimens of the I vs. V curves, before and after a critical carbon black concentration, were found and the feasible mechanisms for such behaviour are discussed.

Direct numerical simulation and experimental validation of flow resistivity of nonwoven fabric filter

AIChE Journal ◽  
2019 ◽  
Vol 66 (2) ◽  
Author(s):  
Mohammad Irwan F. Rozy ◽  
Masaki Ueda ◽  
Tomonori Fukasawa ◽  
Toru Ishigami ◽  
Kunihiro Fukui
Keyword(s):  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Experimental Validation ◽  
Nonwoven Fabric ◽  
Fabric Filter ◽  
Flow Resistivity

Keyframe-Based Vehicle Surveillance Video Retrieval

2018 ◽  
Vol 10 (4) ◽  
pp. 52-61
Author(s):  
Xiaoxi Liu ◽  
Ju Liu ◽  
Lingchen Gu ◽  
Yannan Ren
Keyword(s):  
Video Retrieval ◽  
Public Security ◽  
Video Content ◽  
Surveillance Video ◽  
Forensic Evidence ◽  
Improve Performance ◽  
Retrieval Method ◽  
Deep Feature ◽  
Before And After ◽  
Short Video

This article describes how due to the diversification of electronic equipment in public security forensics, vehicle surveillance video as a burgeoning way attracts us attention. The vehicle surveillance videos contain useful evidence, and video retrieval can help us find evidence contained in them. In order to get the evidence videos accurately and effectively, a convolution neural network (CNN) is widely applied to improve performance in surveillance video retrieval. In this article, it is proposed that a vehicle surveillance video retrieval method with deep feature derived from CNN and with iterative quantization (ITQ) encoding, when given any frame of a video, it can generate a short video which can be applied to public security forensics. Experiments show that the retrieved video can describe the video content before and after entering the keyframe directly and efficiently, and the final short video for an accident scene in the surveillance video can be regarded as forensic evidence.

Nanocomposite polymer carbon-black coating for triggering pyro-electrohydrodynamic inkjet printing

2015 ◽  
Vol 106 (26) ◽  
pp. 261603 ◽  
Author(s):  
S. Coppola ◽  
L. Mecozzi ◽  
V. Vespini ◽  
L. Battista ◽  
S. Grilli ◽  
...  
Keyword(s):  
Carbon Black ◽  
Inkjet Printing ◽  
Nanocomposite Polymer ◽  
Black Coating

Motion Parallax and Distance Estimation Underwater

1974 ◽  
Vol 38 (3) ◽  
pp. 747-750
Author(s):  
Steven H. Ferris
Keyword(s):  
Head Movement ◽  
Distance Perception ◽  
Motion Parallax ◽  
Distance Estimation ◽  
Vertical Axis ◽  
Improve Performance ◽  
Water Turbidity ◽  
Position Constancy ◽  
Before And After ◽  
Positive Results

The possible value of monocular motion parallax for improving distance perception underwater was investigated. Submerged Ss either kept their heads stationary or rotated their heads about a vertical axis while judging the distance of objects placed 4 to 15 ft. away. Both before and after training with feedback to increase accuracy of judgment, head movement did not significantly improve performance. Water turbidity and loss of position constancy are two probable reasons for the failure to replicate the positive results previously obtained in air.

Study on Mercury Emission Control of Dust Removal System for 300MW Coal-Fired Units

2014 ◽  
Vol 556-562 ◽  
pp. 2133-2136
Author(s):  
Fan Wang ◽  
Jin Wei Zhu ◽  
Qing Cao ◽  
Xiang Feng Wang ◽  
Fan Zhang ◽  
...  
Keyword(s):  
Fine Particles ◽  
Electrostatic Precipitator ◽  
Flue Gas Desulfurization ◽  
Dust Removal ◽  
Mercury Removal ◽  
Fabric Filter ◽  
Gaseous Mercury ◽  
Before And After ◽  
Us Epa ◽  
Removal System

In this study we researched on the gaseous mercury removal performances of fabric filter (FF), electrostatic precipitator (ESP) and wet flue gas desulfurization (FGD) technologies on 300 MW coal-fired boilers, gaseous mercury sampling was conducted according to US EPA Method 30B and Method 29, and the changes of various forms of mercury before and after the dust removal treatment were analyzed. The results show that FF is the most effective for fine particles removal, and more than 99.5 % of the particulate mercury was removed; the gaseous mercury removal efficiency of ESP was only 30%, while the efficiency of FF was 45% or higher; the combination of FF and wet FGD could remove 63.65 % of the gaseous mercury.

scholarly journals Analysis of Literary Situation and Reconstruction of the Writing Subject in Literary Education by Educational Psychology

2022 ◽  
Vol 12 ◽  
Author(s):  
Gaonan Xu ◽  
Zhaoming Li ◽  
Fengrui Zhang ◽  
Bojing Liu
Keyword(s):  
Influencing Factors ◽  
Educational Psychology ◽  
Teaching Strategy ◽  
Reference Value ◽  
Teaching Writing ◽  
Literature Teaching ◽  
Literary Education ◽  
Motivation For Learning ◽  
Before And After ◽  
Teachers And Students

Educational psychology focuses on the laws of change in the knowledge, skills, and individual psychology of the educatees in the process of education and teaching. Writing teaching is a key and difficult point in literature teaching. Nowadays, it is common for students to be afraid and tired of writing in school literature education. In view of these problems, the present work optimizes the teaching mode of writing from the perspective of reconstructing the writing subject. Through literature research and interdisciplinary analysis, a questionnaire is designed to analyze the literary situation and the reconstruction of writing subjects in literary education. The questionnaire is aimed at three aspects, namely the hidden educational effect of teachers’ personality charm, the influencing factors of students’ psychology and students’ learning effect, and the influencing factors of psychology of the communication between teachers and students and teachers’ teaching effect. Then, the changes of students’ performance in literary class in these three aspects before and after using the teaching strategy of writing subject reconstruction are analyzed. Finally, the changes of students’ grades in the literary course are investigated. In this experiment, a total of 400 questionnaires were distributed, and a total of 389 questionnaires were collected. The survey results show that the number of students who feel the classroom atmosphere is active increases by 10%, the number of students who listen carefully and take notes increases by 7%, and 45% of students have improved their grades. Besides, after the implementation of the teaching strategy, most students change their attitude to the literature course, become more active, and significantly improve their motivation for learning. This study has a certain reference value for the analysis of literary situations and the reconstruction of writing subjects in literary education from the perspective of educational psychology.

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