scholarly journals Development of ultraviolet bactericidal recirculator for air purification of livestock buildings

2019 ◽  
pp. 149-155
Author(s):  
Dovbnenko, O. ◽  
Kolesnik, I.
Keyword(s):  
Engineering Calculation ◽  
Air Purification ◽  
Uvb Radiation ◽  
Purification Process ◽  
Technical Parameters ◽  
Livestock Buildings ◽  
Air Capacity ◽  
Installed Capacity ◽  
Bactericidal Efficiency ◽  
Grounded Design

Purpose. Improving the efficiency of the air purification process through the use of the created design and determining the rational parameters of the luminescent ultraviolet bactericidal air recirculator for livestock buildings. Methods. Methods of analysis, mathematical modeling and engineering methods for calculating irradiation installations are used. Results. The methods of application of ultraviolet bactericidal (UVB) plants for purification and disinfection of the air environment in agricultural premises are analyzed. Impact mechanism established of UVB radiation and ozone for pathogenic microflora and harmful impurities in the air of livestock premises is substantiated. The grounded design, the method of engineering calculation and the technical parameters of the UVB air recirculator are determined. Experimental samples of UVB recirculators of air in livestock buildings were made and the results of their production tests are presented. Conclusions. UVB recycle converter with application of luminescent UVB lamps with installed capacity = 180 W and air capacity = 1800 m3/h provides bactericidal efficiency = 75%, and with = 1000 m3/h – bactericidal efficiency = 90%. Keywords: recirculator, ultraviolet, bactericidal, ozone, air purification, disinfection, microclimate of livestock buildings.

Coordination of energy parameters of the ultraviolet bactericidal recirculator of air of livestock premises

2020 ◽  
pp. 187-193
Author(s):  
O. F. Dovbnenko
Keyword(s):  
Radiation Power ◽  
General Purpose ◽  
Specific Power ◽  
Uvb Radiation ◽  
Energy Parameters ◽  
Industrial Enterprises ◽  
Radiation Sources ◽  
Cleaning And Disinfection ◽  
Installed Capacity ◽  
Bactericidal Efficiency

Annotation Purpose. Coordination of energy parameters of the ultraviolet bactericidal recirculator of air of animal premises for achievement of the set value of bactericidal efficiency. Methods. Methods of analysis, mathematical modeling and engineering methods of calculation of ultraviolet bactericidal installations are used. Results. Methods of application of ultraviolet bactericidal (UVB) installations for cleaning and disinfection of indoor air are analyzed. Substantiated design, UVB air recirculator. The dependences of the bactericidal power of UVB radiation sources in the recirculator on air productivity and bactericidal efficiency are determined. The specific power of UVB radiation to achieve the specified value of bactericidal efficiency and rational values of bactericidal efficiency of recirculates for industrial enterprises and general purpose premises are established. Conclusions 1. The specific power of UVB radiation to achieve the specified value of bactericidal efficiency in the range of 80…99.9% with the use of UVB air recirculators. To ensure bactericidal efficiency of 80%, the specific power of bactericidal radiation is 6.5 W/100 m3, and for 99.9% 4.3 times more than – 27.9 W/100 m3. 2. Due to the need to significantly increase the installed capacity of irradiators, ultraviolet air recirculators with bactericidal efficiency of more than 95% should be used in premises of categories 1 and 2, as well as in agricultural production facilities for feasibility study. 3. To achieve a recirculator RPB 1.0 with air productivity = 1000 m3/h bactericidal efficiency = 90% required bactericidal radiation power = 93 W, and for = 99% – = 186 W. Keywords: ultraviolet bactericidal recirculator, air purification and disinfection, bactericidal power of ultraviolet irradiators, bactericidal efficiency of recirculator.

scholarly journals Technological Aspects of Energy-Efficient High-Quality Cleaning of Indoor Air from Harmful Impurities

2021 ◽  
Vol 24 (4) ◽  
pp. 17-24
Author(s):  
Valeriy Adamchuk ◽  
Oleg Dovbnenko ◽  
Yuriy Danik ◽  
Oleh Skydan
Keyword(s):  
Power Systems ◽  
Indoor Air ◽  
Energy Efficient ◽  
High Speed ◽  
Engineering Calculation ◽  
Research Process ◽  
High Rate ◽  
Air Purification ◽  
High Quality ◽  
Technical Parameters

Bringing to safe health standards and maintaining the basic parameters of the air (microclimate) in the premises for various purposes within the established limits with a high level of efficiency, pro-vides an opportunity to solve the problem of national importance – public health and the necessary environmental characteristics. The purpose of the study is to develop technology and foundations for the construction of universal systems of automated high-quality air purification in rooms for various purposes. Methods of analysis, synthesis, mathematical modelling, and engineering calculations were used in the research process. The technology, composition, and structure of universal systems for au-tomated cleaning and maintenance of the required indoor air quality, which provides automatic control of air parameters, have been developed. The composition and features of software and hardware are substantiated, the method of engineering calculation, structure of air purification system is developed and its technical parameters are defined. The synergetic effects in the implementation of air purification, which are achieved through a comprehensive, consistent with the procedures and pro-cesses of sequential parallel processing of injected and filtered air, have been investigated and proved. Developed technology and systems provide the ability to purify large volumes of air at high speed and quality in rooms with different levels of mechanical contamination, microflora, other harmful impurities, including microorganisms, allergens, dangerous viruses that cause infections with pathogens diseases characterised by mass and high rate of spread, such as COVID-19. For the first time, the problem of creation of energy-efficient high power systems of complex air purification for industrial premises of large sizes, which are 2.5-4 times more effective on all basic indicators in com-parison with the best analogues has been solved

scholarly journals Designing the ultrasonic system used in industrial air filtration based on the ultrasonic cavitation phenomenon

2019 ◽  
Vol 290 ◽  
pp. 11009
Author(s):  
Dan Niţoi ◽  
Zoia Apostolescu ◽  
Constantin Petriceanu ◽  
Corneliu Rontescu
Keyword(s):  
Ultrasonic Transducer ◽  
Ultrasonic Cavitation ◽  
Ultrasonic Transducers ◽  
Air Purification ◽  
Acoustic System ◽  
Purification Process ◽  
Air Filtration ◽  
Air Filter ◽  
Cavitation Phenomenon ◽  
Working Method

The paper presents the activity developed developed in the field of polluted air purification from industrial shop (paint shops, foundries, welding constructions, forging, etc.). The advantages of using ultrasounds in the pollutant air filtration and purification process and an ultrasonic filter designed are presented considering the ultrasonic cavitation phenomenon. The main computational and construction elements of the ultra-acoustic system used in the design of the air filter are presented in the paper. The work focuses in the design of the main part of the ultrasonic system represented by ultrasonic transducer. In this case, the transducer network that is used in ultrasonic cavitation method consists of ten ultrasonic transducers. Each one of them consists of asymmetrical passive elements (reflector and radiant element).The design steps and the use of FEM as working method will provide the theoretical basis of the operation of the ultrasonic system so that it allows air filtration based on the ultrasonic acoustic cavitation phenomenon.

scholarly journals Determination parameters of the precipitating electrode of the electrotechnical means for cleaning air of livestock buildings from harmful gases and bacterial contamination

2019 ◽  
pp. 141-148
Author(s):  
Gerasymchuk, Y. ◽  
Adamenko, O. ◽  
Lavrishchev, A. ◽  
Novoselytskiy, Y.
Keyword(s):  
Bacterial Contamination ◽  
Cold Season ◽  
Air Purification ◽  
Chemical Methods ◽  
Livestock Buildings ◽  
Basic Parameters ◽  
Purification Methods ◽  
Cleaning And Disinfection ◽  
Experimental Researches

Purpose. Get dependence to determine the mass of the chemical adsorbent which is contained on the rotating precipitating electrode of the electrotechnical means, taking into account the kinetics of the process of air purification of livestock buildings from harmful gases and bacterial contamination with the complex use of electrophysical and chemical methods of decontamination and air purification. Methods. Analysis of the influence of chemical adsorbent and crown discharge field on the efficiency of air purification of livestock buildings from harmful gases and bacterial contamination. Experimental researches for determination of basic parameters of a precipitating electrode of an electrotechnical means. Results. Scheme of the electrotechnical means with the complex using of electrophysical and chemical methods of purification and disinfection of recirculation air of ventilation emissions from ammonia, carbon dioxide, hydrogen sulfide and bacterial contamination. Polynomial dependence for determining the mass of a chemical adsorbent which is contained on a rotating depositing electrode. Conclusions. Complex using of the electrotechnical means for air purification from harmful gases and bacterial contamination of the recirculation air flow and the utilization heat of ventilation emissions with the implementation anti-icing protection heat exchange surface of the recuperative heat utilizers allows to reduce the level of air exchange and significantly reduce energy costs to provide regulatory airspace of livestock buildings in the cold season. On the disks of precipitating electrodes of an electrotechnical mean for cleaning and disinfection of recirculation air of ventilation emissions, it is necessary to fix a polymer mesh with an area of cellules of 16 mm2, and the frequency rotation of the discs to support within the range from 0.25 s-1 to 1 s-1. Keywords: microclimate, heat utilizer, recuperate, air purification, corona discharge, precipitating electrode.

Analysis of galanthamine and related alkaloids in plant extracts and during the purification process by GC-MS

Planta Medica ◽  
2007 ◽  
Vol 73 (09) ◽  
Author(s):  
S Berkov ◽  
C Codina ◽  
F Viladomat ◽  
J Bastida
Keyword(s):  
Plant Extracts ◽  
Purification Process

Review of methods of slag removal from melt surface in hot metal and steel ladles

2020 ◽  
Vol 76 (12) ◽  
pp. 1243-1252
Author(s):  
B. A. Sivak ◽  
A. V. Protasov ◽  
L. A. Smirnov
Keyword(s):  
Settling Tank ◽  
Necessary Condition ◽  
Hot Metal ◽  
Slag Removal ◽  
Production Scale ◽  
Technical Parameters ◽  
Ecological Requirements ◽  
The Usa ◽  
Work Done ◽  
Technological Methods

The removal of slag from melt surface of hot metal and steel ladles is a necessary condition to provide a deep desulphurization and dephosphorization of hot metal and steel in the process of their processing. A review of methods of slag skimming presented, mainly based on slag mechanical shoveling and its removal out of ladles by vacuum sucking. It was shown, that manipulators design for the slag skimming working instrument moving depends on the production scale, mass of the processed heats, amount and properties of the slag to be removed, production process intensity and ecological requirements. Peculiarities of designs and technical parameters of machines for slag skimming presented, designed by Irkutsk plant of heavy machinery, Scientific and Production Enterprise n.a. M.I. Platov, VNIIMETMASH, Kuznetsk and Novolipetsk steel plants. Technological methods of control of slag composition and physical properties considered, first of all of viscosity and fluidity, which have significant effect on selection of a method of slag skimming. Advantages and drawbacks of actions, aimed at more complete slag removal from metal surface by a scraper noted including bath blowing off by an inert gas, liquid slag tapping into am intermediate settling tank following its removal into a slag bowl. In case of satisfactory fluidity it is possible to slag removal by vacuum sucking, which at the same time promoted the melt degassing. Work done in this area abroad noted. Methods of vacuum slag removal developed in the USA and Japan described.

PENGARUH PELARUT KLOROFORM DALAM PEMURNIAN GLISEROL DENGAN PROSES ASIDIFIKASI ASAM KLORIDA

2016 ◽  
Vol 5 (3) ◽  
pp. 38-43
Author(s):  
Windi Monica Surbakti ◽  
Gerson Rico M.H ◽  
Mersi Suriani Sinaga
Keyword(s):  
Fatty Acid ◽  
Volume Ratio ◽  
Biodiesel Production ◽  
Extraction Time ◽  
Glycerol Concentration ◽  
Purification Process ◽  
Soap Content ◽  
Test Volume ◽  
Base Content ◽  
Water Salt

Glycerol as a byproduct of biodiesel production was approximately formed 10% of the biodiesel weight. Impurities which contained in the glycerol such as catalyst, soap, methanol, water, salt, and matter organic non glycerol (MONG) have a significant effect on the glycerol concentration. So, it is necessary to treat the impurities. The purpose of this study is to know the effect of chloroform to glycerol purification process with acidification method using hydrochloric acid as pretreatment process. This research was begun with acid addition to the glycerol to neutralize the base content and to split the soap content into free fatty acid and salt, that are more easily separated from glycerol. Then the process was continued with extraction by the solvent chloroform using the variable of test volume ratio (v/v) (1:1, 1:1.5, 1:2)  and the extraction time (20, 40, and 60 minutes). The results showed that the more volume of solvent used, gave less extraction time to produce high purity of glycerol. The highest purity produced in this study amounted to 90,9082% is obtained at the ratio of the volume solvent (v/v) 1:1 with extraction time 60 minutes.

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