Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 10

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
Wyszukiwano:
w słowach kluczowych:  gas treatment
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
PL
W pracy przedstawiono wyniki wstępnych badań nad efektywnością ograniczenia stężenia tlenków azotu w gazach odlotowych z instalacji wypalania klinkieru metody suchej z długim piecem obrotowym przy wykorzystaniu nadtlenku wodoru o stężeniu 30%. Badania przeprowadzono na doświadczalnej instalacji o przepustowości gazów wynoszącej 5000 m3n/h, przy temperaturze na wejściu do instalacji ok. 170°C i wilgotności gazów na poziomie 3–4%. Podczas badań w sposób ciągły kontrolowano parametry gazu, takie jak: strumień gazów, temperatura, skład gazów. Efektywność usuwania NOx z gazów wynosiła od 10 do 60%. Podstawowe czynniki wpływające na tę efektywność to strumień masy dozowanego nadtlenku wodoru oraz skład oczyszczanych gazów.
EN
This paper presents the results of preliminary research on efficiency of nitrous oxides concentration reduction in exhaust gases from long dry kiln using 30% hydrogen peroxide solution. Research was conducted on an experimental installation with a gas throughput of 5000 nm3/h at the gas inlet temperature of 170°C and gas moisture of 3–4%. During the tests parameters such as: gas flow rate, temperature and gas composition were monitored constantly. The efficiency of removing NOx from exhaust gases was from 10 to 60%. Primary factors influencing this efficiency are mass flow rate of hydrogen peroxide and composition of exhaust gas.
EN
A technical approach based on microbial technology is proposed to help resolve the problems caused by explosive gases in coal mines. The proposed technique uses methanotrophic bacteria to oxidize methane. In laboratory experiments, the oxidation effect of hanging nets impregnated with liquid containing methanotrophic bacteria was investigated at different air flow-rates. The experimental results showed that the volume of gas degraded and the gradient of degradation both increased as the gas concentration increased at constant air flow-rates. At fixed gas concentrations, the volume of degraded gas increased with increasing flow-rates of air at low flow-rates. However, the volume of degraded gas slightly decreased with increasing flow-rates of air at high flow-rates. These experimental results provide a theoretical basis for the treatment of explosive gases during exploration for natural gas and to treat potentially dangerous concentrations of gas in gobs, caves and upper corners of mineshafts. They will also be of great practical significance in coal mining.
3
Content available remote Grain size and leaching test analysis of fly ash from sludge incinerator
EN
The contribution deals with grain size analysis and leaching test of fly ash as a solid waste from gas treatment technology at sludge incinerator. Grain size analysis and leaching test was carried out to determine hazardous substances which have adverse effect on environment. Sludge incinerator is a part of petrochemical complex and it’s used for ecological disposal of mechanical and biological sludge from the wastewater treatment plant (Géci 2013). Incineration technology of thermal oxidation is divided in two steps. In first step mixed sludge is warmed, dried and organic matter is burned off. In second step flue gas emissions are cleaned in four-step cleaning technology to keep up air emission quality. Product of the treated gas, during combustion process, is fly ash where annually production is approximately 600 t per year (Polc et al. 2013) and depends on chemical composition of burned sludge, working time per year and air emission quality. Fly ash is a mixture of inorganic compounds, salts of acidic flue gas components dissolved in water (fluorides, sulphates) and insoluble components (zeolite and activated carbon). It is a fine powder of light brown to light grey color. It contains unreacted NaHCO3, Na2SO3, Na2SO4, NaCl, NaF (Špak et al. 2012, Polc et al. 2013), further small content of silicon, calcium, magnesium, iron, sodium and potassium oxides and traces of heavy metals adsorbed on the zeolite and activated carbon. The samples used for mineralogical composition were then studied at diffractometer Philips PW 1710. X-ray diffraction sample record has a relatively high background, indicating the presence of amorphous phase (23.1 wt. %), which seems to be the amorphous glass or unburnt organic material. Mineral phase gehlenite (46.9 wt. %) has the highest proportion in the sample, followed by maghemite (12.7 wt. %), hematite (6 wt. %) and thenardite (6 wt. %). In granulometry analysis has been shown that fly ash is very fine material, were 97% mass fraction is under 0.09 mm grain size. Overall results are that 2% of mass fraction is under 0.04 mm gran size, 79 wt. % under 0.063 mm, 97.0 wt. % under 0.09 mm, 99 wt. % under 0.125 mm and 100 wt. % under 0.25 mm grain size. In leaching test, there was in execution potential of hazardous compounds discharge to environment. Leaching test was executed in water solution according Annex 22 and 23 of the Decree No. 310/2013, which implements certain provisions of the Waste Act and this method is suitable mainly for inorganic parts of waste. Leaching of trace elements from ash is affected by the chemical composition of the solution during weathering distribution of these elements in the solid matrices and secondary phases. Secondary phases produced during weathering, have a significant control to their mobility in ash (Eary et al. 1990). Given that the flue gas cleaning technology aims to reduce emissions of acidic compounds into the atmosphere. Therefore there is the “enrichment” of these components in the waste, which leads to concentration of f luorides, sulphates, and other components in leachate. Potentially toxic elements shows decreasing leaching tendency from Al > V > Pb > Mo > As > Sn > Zn. According to high proportion of acidic components and fine fraction, leaching is also an important parameter in terms of determine the way of next handling (landfilling) of fly ash. The stabilization of waste is particularly important because of the potential leaching of acidifying components – fluoride, sulfate and total dissolved solids into environment.
EN
Odorization is the process which has crucial impact on the safety of the distribution and usage of natural gas. A very small amounts of odorant are added into naturally odorless fuel. The odorant has distinctive and well odor. Traditionally, used for decades, odorants are based on sulfur compounds. More recently in some countries sulfur-free compound is used as odorant. This article is an attempt to determine the applicability of sulfur-free odorant in natural gas distribution network in Poland. This includes the possibility of implementing a new odorant for the usage in the aspect of existing legislation in the area of odorization. The existing infrastructure used in the process of natural gas odorization has been analyzed and range of necessary adaptation actions has been indicated. The issue of smell diversity in comparison sulfur-free with traditionally used odorants has also been discussed. At the end, the ecological aspects of new odorant usage on a larger scale and re being taken under consideration.
5
Content available remote Low-temperature plasma for exhaust gas purification from paint shop - a case study
EN
Devices generating and using non-thermal plasma are often critical parts of industrial set-ups, for purification of exhaust gases. Many research groups work on improvements of plasma generators for ozone (alone or in combination with other oxidants such as H2O2, OH radicals, etc.) production. Such oxidants' generators can be successfully applied in the case of "point" gas emissions like chimneys of factories or farms and also for "line" emissions caused by road traffic. Presented work describes plasma generator used for the treatment of factory exhaust gas containing hydrocarbons. Data from plasma burn-up of gas from mold painting factory using gliding arc reactor are presented.
PL
Urządzenia do generowania i zastosowań plazmy niskotemperaturowej są niejednokrotnie ważnymi elementami instalacji przemysłowych do oczyszczania gazów odlotowych. Wiele grup badawczych pracuje nad udoskonaleniem generatorów różnorakich związków utleniających stosowanych do rozkładu polutantów biologiczno-chemicznych. Reaktory plazmowe mogą być używane zarówno w przypadku zanieczyszczeń punktowych takich jak kominy fabryk czy farmy jak też do kontroli zanieczyszczeń liniowych powodowanych przez ruch uliczny. Praca przedstawia generator plazmowy ze ślizgającym się łukiem stosowany do usuwania związków zawierających węglowodory Analizowany jest przypadek plazmowego dopalania gazów odlotowych z lakierni zakładu odlewniczego.
PL
W pracy podjęto badania mające na celu wykorzystanie szczepów bakteryjnych do regeneracji sorbentów stosowanych do usuwania lotnych związków organicznych ze strumienia gazu. Dla wybranych związków: benzenu i butanolu-1 opracowano równania kinetyczne, równowagę procesu adsorpcji i absorpcji oraz desorpcji i ekstrakcji a następnie przeprowadzono proces zintegrowany: desorpcji z węgla aktywnego lub ekstrakcji z absorbera organicznego i biodegradacji.
EN
Studies devoted to microbial regeneration of sorbents used to remove volatile organic compounds from gas stream are presented in the paper. For selected compounds: benzene and butanol-1 kinetic equations and equilibrium of adsorption, absorption from gas, desorption and extraction to water phase were developed. Then the integrated process: desorption from activated carbon or extraction from organic absorbent and biodegradation process was carried out.
8
Content available remote Oczyszczanie gazu składowiskowego
PL
W referacie dokonano przeglądu metod oczyszczania biogazu z zanieczyszczeń stanowiących źródło emisji szkodliwych zanieczyszczeń do powietrza oraz mogących zakłócać przebieg procesów związanych z późniejszym wykorzystaniem gazu, np. energetycznym.
EN
In this paper, methods of biogas treatment has been reviewed. Some landfill gas pollutants may cause damaging emissions to the air and may disrupt course of processes connected with gas utilisation (i.e energetic use).
PL
W artykule opisano przebieg adsorpcji metanolu na węglu aktywnym i jego desorpcję oraz przebieg procesu regeneracji węgla aktywnego gazem obojętnym - azotem - w prezentowanej instalacji. Zamieszczono przykładowe procedury obliczeniowe dla oczyszczania powietrza technologicznego z jednoczesnym odzyskiwaniem adsorbowanej substancji. Przytoczono wartości poszczególnych parametrów techniczno-technologicznych jako rezultat przeprowadzonych obliczeń. W wyniku powyższych prac powstały wytyczne do projektowania i użytkowania konkretnej instalacji adsorpcyjno-desorpcyjnej o znacznie sprawniejszych i tańszych procesach technologicznych
EN
The course of methanol adsorption on active carbon as well as its desorption and course of regeneration of active carbon with a neutral gas (nitrogen) in the presented system are presented in the paper. Calculation procedures for cleaning technological air with concurrent recovery of the adsorbed substance are given in the paper. The values of calculated technical and technological parameters are presented. Guidelines for a specific adsorption-desorption system having efficient and cheaper technological processes have been worked out on the basis of these studies
10
PL
W opracowaniu przedstawiono metodę modyfikacji właściwości odlewniczych stopów aluminium za pomocą aktywnych chemicznie odmian gazów otrzymywanych przez obróbkę w polu elektrycznym za pomocą urządzeń, których przykładem jest generator ozonu. Stosując typowe techniki transportu pneumatycznego wykonano kompozyt oraz przedstawiono jego składniki strukturalne. Opracowanie dotyczy obróbki znormalizowanego stopu AM-4.
EN
In work the casting properties of aluminum alloy modification with electricity activated gas method has been presented. Applying typical pneumatic conveying methods the composite was made and their structural composition has been shown. The work concern treatment of standard AM4 alloy.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.