IMPROVEMENT OF ELECTROSTATIC FILTRATION AIR OF INDUSTRIAL SPACES OF AGRIBUSINESS

2020 ◽  
Vol 18 (4) ◽  
pp. 117-123
Author(s):  
S.A. Dobrin ◽  
◽  
S.Yu. Shubkin ◽  
S.S. Buneev ◽  
S.V. Eletskikh ◽  
...  
Keyword(s):  
Aerosol Particles ◽  
Operating Principle ◽  
Fine Dust ◽  
Cleaning Efficiency ◽  
Food Industries ◽  
Clean Technologies ◽  
High Degree ◽  
Degree Of Purification

The aim of the study was to develop a promising filtering device for cleaning industrial premises from fine dust of aerosol particles, providing increased cleaning efficiency and safety. A high degree of purification is guaranteed by electrostatic filters of the order of 90-95%. However, they also have a number of disadvantages that require improvements in the operating principle and design. In connection with the development of "clean" technologies in medicine, in the electronic and food industries, this direction of research is relevant.

Reduction o Air Pollution from Fine Dust by Increasing Efficiency of Gas Emission Purification Sintering Furnaces

2021 ◽  
Vol 25 (12) ◽  
pp. 4-9
Author(s):  
E.V. Kiryushin ◽  
O.V. Pilyaeva ◽  
I.I. Shepelev ◽  
E.N. Eskova
Keyword(s):  
Air Pollution ◽  
Gas Purification ◽  
Fine Dust ◽  
Gas Emission ◽  
Atmospheric Air ◽  
Gas Cleaning ◽  
Waste Gas ◽  
Purification Unit ◽  
High Degree ◽  
Degree Of Purification

The installation of an additional stage of the "wet" waste gas purification unit at the alumina sintering furnaces ensured the achievement of a high degree of purification of gas emissions from fine impurities up to 96 % and the standards of maximum permissible emissions of solid pollutants into the atmosphere established for an industrial enterprise. The formed slude after gas cleaning is proposed to be sent for further processing to the hydrochemistry workshop, thereby ensuring its disposal without contamination of the natural environment. The analysis of air pollution indicators confirmed a decrease in emissions of solid pollutants in the atmospheric air of Achinsk.

Technology of the manufacture of Mesolithic Bone Arrowheads on the Upper Volga

1998 ◽  
Vol 1 (2) ◽  
pp. 149-176 ◽  
Author(s):  
Mickle G. Zhilin
Keyword(s):  
Stone Tools ◽  
Secondary Treatment ◽  
Fine Dust ◽  
Upper Volga ◽  
Lithic Tools ◽  
High Degree ◽  
Tubular Bones

Excavations of stratified peat sites, carried out by the author on the Upper Volga during recent years, yielded a large number of varied bone projectile heads. Among these, arrowheads are most numerous. Half-finished artifacts of this group were also found together with lithic tools used for boneworking. Traceological studies enabled the author to identify various features left by lithic tools on the surface of the bone artifacts. A programme of experiments helped in the understanding of the operational chain during their manufacture, and what tools were used for each stage.Long tubular bones were used to make the majority of the arrowheads. They were either broken into long pieces with a hammerstone or use was made of the ‘groove and splinter’ technique. Direct percussion with hammerstones was used for other bones. Secondary treatment included more accurate flaking and retouch, cutting, planing, scraping, sawing with the help of stone tools, usually flint burins, knives, scrapers and saws. Abrasive slabs were used for grinding, while fine polishing was achieved with the help of leather, sometimes, with fine dust-like abrasive agents.The operational chain for the manufacture of arrowheads was the following: (1) obtaining a splinter of bone; (2) removal of unnecessary mass of bone with the help of burin and scraper to create a pre-form; (3) cutting of slots for inserts (for composite arrowheads); (4) planing of the surface with a knife, carving of details and, engraving of ornamentation. Many arrowheads were then polished, except for their bases. Specific variants of secondary treatment were observed on some arrowheads. The study showed a high degree of development of boneworking, with standardization of designs and technological operations, especially during Boreal times. Later, many arrowheads were crudely made, though wear traces and resin at their bases indicate that these are finished tools which were used.

Analysis and Research of Hydraulic Roof Bolter in Performance Testing

2015 ◽  
Vol 733 ◽  
pp. 607-610
Author(s):  
Bin Zhou ◽  
Ying Yang ◽  
Kun Ming Yang ◽  
Yuan Bo Dong
Keyword(s):  
Rotational Speed ◽  
Performance Testing ◽  
Test System ◽  
Test Methods ◽  
Operating Principle ◽  
Roof Bolter ◽  
Speed Flow ◽  
High Degree

We propose a test system which is easy to operate, and has high degree of automation, and introduce its detail of operating principle and test methods, and according to the requirements of the hydraulic jumbler performance, mainly test the rotational speed, flow, torque and propulsion and other performances of the hydraulic bolt rig. The measured results were analyzed and studied, and then the measures for improvement were proposed.

scholarly journals Separation of Contaminants in The Freeze/Thaw Process

2017 ◽  
Vol 38 (2) ◽  
pp. 249-264 ◽  
Author(s):  
Janusz A. Szpaczyński ◽  
Jeffrey A. White ◽  
Caroline L. Côté
Keyword(s):  
High Efficiency ◽  
Solid Particles ◽  
Liquid Volume ◽  
Freezing And Thawing ◽  
Repeated Freezing ◽  
Clay Slurry ◽  
Thawing Processes ◽  
High Degree ◽  
Degree Of Purification ◽  
Significant Concentration

AbstractThese studies examined the concept of concentration and purification of several types of wastewater by freezing and thawing. The experiments demonstrated that freezing of contaminated liquid contributed to concentration of contaminants in solution as well as significant concentration and agglomeration of solid particles. A high degree of purification was achieved for many parameters. The results of comparative laboratory tests for single and multiple freezing are presented. It was found that there was a higher degree of concentration of pollutants in wastewater frozen as man-made snow than in bulk ice. Furthermore, the hypothesis that long storage time of liquid as snow and sufficient temperature gradient metamorphism allows for high efficiency of the concentration process was confirmed. It was reported that the first 30% of the melted liquid volume contained over 90% of all impurities. It gives great opportunities to use this method to concentrate pollutants. The results revealed that the application of this process in full scale is possible. Significant agglomeration of solid particles was also noted. Tests with clay slurry showed that repeated freezing and thawing processes significantly improve the characteristics of slurry for sedimentation and filtration.

ABOUT EFFICIENCY OF INDIVIDUAL PROTECTION EQUIPMENT OF RESPIRATORY ORGANS AS PROPHYLACTICS OF DISEASES (REVIEW)

2018 ◽  
pp. 2-6 ◽  
Author(s):  
V. A. Kaptsov ◽  
A. V. Chirkin
Keyword(s):  
Respiratory Protection ◽  
Ability To Work ◽  
Individual Protection ◽  
High Degree ◽  
Degree Of Purification

The review of publications evaluating the effectiveness of personal respiratory protection (RPE) as means of reducing morbidity (occupational and morbidity with temporary loss of ability to work) and indicators of the degree of purification of the inhaled air is presented. It is revealed that with a high degree of probability, systematic studies in this field were not carried out and that in some cases the effectiveness was overestimated by incorrect justification.

scholarly journals Geographical Classification of Tannat Wines Based on Support Vector Machines and Feature Selection

Beverages ◽  
2018 ◽  
Vol 4 (4) ◽  
pp. 97 ◽  
Author(s):  
Nattane Costa ◽  
Laura Llobodanin ◽  
Inar Castro ◽  
Rommel Barbosa
Keyword(s):  
Feature Selection ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Feature Selection Method ◽  
Chemical Components ◽  
Support Vector ◽  
Food Industries ◽  
Vector Machines ◽  
Matthew’S Correlation Coefficient ◽  
High Degree

Geographical product recognition has become an issue for researchers and food industries. One way to obtain useful information about the fingerprint of wines is by examining that fingerprint’s chemical components. In this paper, we present a data mining and predictive analysis to classify Brazilian and Uruguayan Tannat wines from the South region using the support vector machine (SVM) classification algorithm with the radial basis kernel function and the F-score feature selection method. A total of 37 Tannat wines differing in geographical origin (9 Brazilian samples and 28 Uruguayan samples) were analyzed. We concluded that given the use of at least one anthocyanin (peon-3-glu) and the radical scavenging activity (DPPH), the Tannat wines can be classified with 94.64% accuracy and 0.90 Matthew’s correlation coefficient (MCC). Furthermore, the combination of SVM and feature selection proved useful for determining the main chemical parameters that discriminate with regard to the origin of Tannat wines and classifying them with a high degree of accuracy. Additionally, to our knowledge, this is the first study to classify the Tannat wine variety in the context of two countries in South America.

scholarly journals IMPROVING THE EFFICIENCY OF DUSTING IN PRODUCTION PORTLAND CEMENT

2018 ◽  
Vol 1 (12) ◽  
pp. 93-96
Author(s):  
Nikolay Samohvalov ◽  
Yuliya Zykova
Keyword(s):  
Portland Cement ◽  
Hydraulic Resistance ◽  
The State ◽  
Operating Principle ◽  
Dust Collector ◽  
Ball Mills ◽  
Cleaning Efficiency ◽  
Dust Collection

The analysis of the state of dust collection in the production of Portland cement is presented. A new scheme of purification of aspiration air from ball mills, when crushing clinker, using slotted filters and jet-filtration dust collector. The description and operating principle of recommended dust collectors are given. This scheme will improve the cleaning efficiency and reduce the hydraulic resistance during dust collection.

VI.—Note on the Lakes of Zurich and Wallen

1893 ◽  
Vol 10 (5) ◽  
pp. 222-225
Author(s):  
C. S. Du Riche Preller
Keyword(s):  
Drainage Area ◽  
High Degree ◽  
Degree Of Purification

In the course of the summer 1892, I had occasion to visit and examine the drainage area of the Lake of Zurich, including that of the Wallensee; and this gave rise to some interesting observations relating more especially to the origin of those lakes, to the high degree of purification of their waters by chemical and mechanical agency, and to some noteworthy effects of certain geological changes in their watersheds.

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