scholarly journals Wet Air Cleaning of Inorganic Gases and Dust With Brush Gun

2015 ◽  
Vol 4 (3) ◽  
pp. 44-47
Author(s):  
Губин ◽  
A. Gubin ◽  
Суханов ◽  
P. Sukhanov ◽  
Гавриленков ◽  
...  
Keyword(s):  
General Scheme ◽  
Air Purification ◽  
Gas Mixture ◽  
Air Cleaning ◽  
Purification Unit

Brush type sprayer was applied to increase the efficiency of catching dust and inorganic gases. Molasses solution in various concentrations was used as an absorbent. Evaluation of capturing the model gas mixture components was carried out. The general scheme of air-purification unit is proposed.

scholarly journals INVESTIGATION OF EFFICIENCY OF AIR CLEANING FROM ACETONE USING A SEGMENTAL CONSTRUCTION BIOFILTER / ACETONO VALYMO IŠ ORO EFEKTYVUMO TYRIMAI, TAIKANT SEGMENTINĖS KONSTRUKCIJOS BIOFILTRĄ

2015 ◽  
Vol 7 (4) ◽  
pp. 380-384
Author(s):  
Denas Bacevičius ◽  
Alvydas Zagorskis
Keyword(s):  
Organic Compounds ◽  
Air Purification ◽  
Maximum Efficiency ◽  
Experimental Investigations ◽  
Test Results ◽  
Acetone Vapor ◽  
Cleaning Efficiency ◽  
Air Cleaning ◽  
Volatile Organic ◽  
Purification Unit

Volatile organic compounds, e. g. acetone, have a direct impact on climate change, decrease of ozone in the air, and on the growth of greenhouse effect. One of the most popular air purifying methods from VOC is a biological air cleaning. Experimental investigations were conducted to determine the efficiency of the new structure of biofilter with polypropylene plates segments. During the investigations the efficiency of segmental construction biofilter of air purification at different initial concentrations of pollutants was determined. Different concentrations of pollutants were estimated during the acetone dilution with water. During the tests the efficiency of biofilter air purification from acetone vapor and its change under different concentrations of vapors was set. Based on test results, the maximum efficiency of biofilter air purification was up to 93%. Studies have shown that increasing the allowable pollutant concentration, the efficiency of air purification unit decreases. Increasing the concentration of supplied acetone vapor into the biofilter from 232 to 701 mg/m3, cleaning efficiency decreased from 92.8 to 82.3%. Since microorganisms fail to oxidize organic compounds, the filter works better at lower initial concentrations of pollutants. Lakieji organiniai junginiai, tokie kaip acetonas, turi tiesioginę įtaką klimato kaitai, ozono kiekio ore mažėjimui, šiltnamio efekto susidarymui. Vienas populiariausių oro valymo nuo LOJ metodų yra biologinis oro valymas. Eksperimentiniai tyrimai atlikti siekiant nustatyti naujos konstrukcijos biofiltro, užkrauto polipropileno plokštelių segmentais, efektyvumą. Tyrimų metu buvo nustatinėjamas segmentinės konstrukcijos oro valymo biofiltro efektyvumas, esant skirtingoms pradinėms teršalo koncentracijoms. Skirtingos teršalo koncentracijos gautos acetoną skiedžiant vandeniu. Bandymų metu nustatytas biofiltro oro valymo nuo acetono garų efektyvumas, jo kaita esant skirtingoms garų koncentracijoms. Remiantis bandymų rezultatais, didžiausias nustatytas biofiltro oro valymo efektyvumas siekė 93 %. Tyrimų metu nustatyta, kad didinant leidžiamo teršalo koncentraciją, įrenginio valymo efektyvumas mažėja. Padidinus į biofiltrą tiekiamų acetono garų koncentraciją nuo 232 iki 701 mg/m3, valymo efektyvumas sumažėjo nuo 92,8 iki 82,3 %. Kadangi mikroorganizmai nespėja oksiduoti organinių junginių, filtras geriau veikia esant mažesnėms pradinėms teršalų koncentracijoms.

scholarly journals Development of an Air-Purification Unit Using a Photocatalysis-Plasma Hybrid Reactor

2011 ◽  
Vol 79 (10) ◽  
pp. 838-841 ◽  
Author(s):  
Tsuyoshi OCHIAI ◽  
Kazuya NAKATA ◽  
Taketoshi MURAKAMI ◽  
Yuko MORITO ◽  
Shunsuke HOSOKAWA ◽  
...  
Keyword(s):  
Air Purification ◽  
Hybrid Reactor ◽  
Purification Unit

scholarly journals PLASMA COATING FORMED TIO2 CATALYSTS USAGE IN CLEANING THE AIR FROM NITROGEN OXIDES AND CARBON MONOXIDE / PLAZMINIU PURŠKIMU SUFORMUOTŲ TIO2 KATALIZATORIŲ TAIKYMAS VALANT IŠ ORO AZOTO OKSIDUS IR ANGLIES MONOKSIDĄ

2015 ◽  
Vol 7 (4) ◽  
pp. 365-371
Author(s):  
Vitalij Kolodynskij ◽  
Pranas Baltrėnas
Keyword(s):  
Carbon Monoxide ◽  
Nitrogen Oxides ◽  
Plasma Coating ◽  
Air Purification ◽  
Average Flow Rate ◽  
Cleaning Efficiency ◽  
Average Flow ◽  
Air Cleaning ◽  
Air Stream ◽  
Cleaning Device

The present catalytic air purification device–air cleaning device is capable to reduce nitrogen oxide sand carbon monoxide concentrations in polluted air stream and to achieve high cleaning efficiency. The principle of operation of catalytic air cleaning device is based on plasma coating formed catalysts usage. At high temperatures and oxygen concentrations in the experimental device channel, catalysts become active and reactions of conversion of pollutants start. In this research, the efficiency of cleaning the air from nitrogen oxides and carbon monoxide, by using plasma coating formed titanium oxide and copper-chromium catalysts, is carried out. 50% propane – 50% butane gas mix was used to generate polluted air flow. The maximum cleaning efficiency, cleaning the air of nitrogen oxides and carbon monoxide, reached 86% and 77%, when the average flow rate of polluted air was 0.10 m/s, oxygen concentration in II section of device was 0.5–0.6% and in I section – 0.1–0.2%. Nagrinėjamas įrenginys – katalitinis oro valymo įrenginys, mažinantis azoto oksidų ir anglies monoksido koncentracijas užterštame oro sraute. Katalitinis oro valymo įrenginys veikia naudodamas plazminiu purškimu suformuotus katalizatorius. Esant aukštai temperatūrai ir optimaliai deguonies koncentracijai įrenginio eksperimentiniame kanale, katalizatorių paviršius tampa aktyvus, ir vyksta sudėtingos teršalų konversijos reakcijos. Atliktuose tyrimuose nagrinėtas suminis titano oksido ir vario-chromo oksido katalizatorių, kurie buvo pagaminti plazminio purškimo metodu, srauto, užteršto azoto oksidais ir anglies monoksidu, valymo efektyvumas. Užterštam oro srautui sugeneruoti buvo naudojamas 50 % propano – 50 % butano dujų mišinys. Didžiausias valymo efektyvumas, valant orą nuo azoto oksidų ir anglies monoksido, atitinkamai siekė 86 % ir 77 %, esant 0,10 m/s vidutiniam užteršto srauto greičiui, 0,5–0,6 % deguonies koncentracijai II-ojoje įrenginio sekcijoje ir 0,1–0,2 % deguonies koncentracijai I-ojoje įrenginio sekcijoje.

scholarly journals Analysis of Air Purification Methods in Operating Rooms of Chinese Hospitals

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Bingli Zhang ◽  
Liuyi Li ◽  
Xi Yao ◽  
Yuxiu Gong ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Operating Rooms ◽  
Air Purification ◽  
Eastern Region ◽  
Urgent Problem ◽  
General Hospitals ◽  
Air Cleaning ◽  
Tertiary Hospitals ◽  
Grade Ii ◽  
Purification Methods ◽  
Cleaning Technology

This research demonstrates the current use of air purification methods in the operating rooms (ORs) in China. 154 hospitals from 6 provinces were included in this survey to reflect the air purification methods of ORs in 2017. Air cleaning technology (ACT) is used in 124 (80.52%) hospitals. We find that the rates of using grade I, III, or IV clean operating room (COR) in tertiary hospitals are all higher than in lower level hospitals; the rate of using ACT in the ORs is higher, too. In addition, general hospitals have higher rate in using ACT in the ORs than specialized hospitals. The highest rate of using ACT in the ORs is in the eastern region of China. The number of hospitals using ACT, ultraviolet light disinfection, and air sterilizers (such as circulating air UV sterilizer) increased yearly. All grades of CORs can be maintained as required by more than 90% hospitals except grade II COR. In this research, we found air purification methods, especially the ACT, are widely used in hospitals’ ORs. However, finding the way to select and use different air purification methods correctly is an urgent problem to be solved next.

scholarly journals Testing a compact mobile air purification unit, does it do the job

2015 ◽  
Vol 4 (S1) ◽  
Author(s):  
P De Waegemaeker ◽  
J Boelens ◽  
I Leroux-Roels
Keyword(s):  
Air Purification ◽  
Purification Unit

scholarly journals Studies on the Effects of Gaseous Ions on Plant Growth

1962 ◽  
Vol 45 (5) ◽  
pp. 897-904 ◽  
Author(s):  
Albert P. Krueger ◽  
J. C. Beckett ◽  
Paul C. Andriese ◽  
Sadao Kotaka ◽  
Keyword(s):  
Air Pollution ◽  
Plant Growth ◽  
Air Pollutants ◽  
Biological Effects ◽  
Air Purification ◽  
Purification Unit

Air pollutants seriously interfere with the maintenance of unipolar ionized atmospheres required in experimenting with the biological effects of gaseous ions. The construction and operation of an air purification unit designed to reduce air pollution to tolerable levels are described; it has functioned satisfactorily in conducting experiments with plants and animals.

Air Purification from CO2 Gas Using a Scrubber and Suggestions to Reach a Better Efficiency

2019 ◽  
Vol 955 ◽  
pp. 1-6 ◽  
Author(s):  
Jaroslav Vlasák ◽  
Tomáš Svěrák ◽  
Lukáš Dreveny ◽  
Josef Kalivoda
Keyword(s):  
Solid Particles ◽  
Capture Efficiency ◽  
Air Purification ◽  
Gas Mixture ◽  
University Of Technology ◽  
Wet Scrubber

This thesis deals with the testing of our wet scrubber by a laboratory at the Faculty of Chemistry, Brno University of Technology. On this wet scrubber, the CO2 capture efficiency is tested with a splash liquid consisting of 1 % NaOH. An overview of the system, which could increase the capture efficiency of CO2 from the gas mixture or other harmful particulates in the air, could be improved after introduction. The thesis also deals with finding methods to better capture efficiency of solid particles and gases on the wet scrubber.

scholarly journals Indicator materials on the base of fibrous ion exchangers for visualizing of the sorption resource of the chemical air cleaning filters

2020 ◽  
Vol 56 (2) ◽  
pp. 143-149
Author(s):  
E. G. Kasandrovich ◽  
V. S. Soldatov ◽  
L. N. Shachenkova
Keyword(s):  
Color Change ◽  
Resource Depletion ◽  
Air Purification ◽  
Protective Equipment ◽  
Ion Exchangers ◽  
Air Cleaning ◽  
Fibrous Ion Exchangers ◽  
Acidic Nature ◽  
Production And Operation ◽  
Filter Layer

On the base of fibrous ion exchangers, indicator materials were obtained for sorbates of an alkaline and acidic nature, intended to visualize the working time of the filter layer during ion exchange air purification. The optimal conditions for their production and operation were determined. The practical applicability for the manufacture of indicator cartridges for filters of deep air purification and personal protective equipment for human respiratory organs and skin with the aim of timely visualizing of the sorption resource depletion, due to the contrast and sensitivity of the color change, was demonstrated.

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