Calculation and Treatment Measures of Sulfur Dioxide Emission in Waste Gas of Ceramic Industry

The emission index of sulfur dioxide in the exhaust gas of the ceramic industry is an important indicator of the green production of enterprises and the green development of society. This article analyzes the emission sources of sulfur dioxide in the exhaust gas of the ceramic industry, and gives the calculation method for calculating the sulfur dioxide emissions in raw materials and fuels. At the same time, it compares the two-alkali wet desulfurization, limestone-gypsum wet desulfurization, and semi-dry desulfurization. The three governance measures provide references for ceramic companies to evaluate sulfur dioxide emissions and treatment.

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Research on the Application of Porous Ceramic Waste Gas Purification Device in Ceramic Kiln

Materials Science Forum ◽

10.4028/www.scientific.net/msf.980.410 ◽

2020 ◽

Vol 980 ◽

pp. 410-418

Author(s):

Shan Xin Feng ◽

Shi Qiang Pan ◽

Yu Rong Wang

Keyword(s):

Particulate Matter ◽

Ceramic Industry ◽

Porous Ceramic ◽

High Energy ◽

Exhaust Gas ◽

Gas Purification ◽

Waste Gas ◽

High Resource ◽

Purification Plant ◽

High Energy Consumption

Ceramic kiln in the use of the process of high energy consumption, high resource consumption, serious environmental pollution and other problems are the current ceramic industry development of serious problems.Kiln combustion exhaust gas pollution types mainly include: SO2, NOx, CO, particulate matter, lead, cadmium, nickel and its compounds, fluoride and chloride and so on, and the traditional kiln direct emissions into the atmosphere, causing serious pollution to the environment, the need to have reliable purification treatment devices to meet emissions requirements, but the original purification plant purification effect is poor, process complex aspects of problems.This paper introduces a new porous ceramic purification device to improve the electric kiln exhaust gas purification to improve the catalytic conversion of CO, NOX, SO2 desulfurization and particulate matter purification.

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Reduction of Gaseous Boron Compounds in the Waste Gas of Glass Melting Furnaces

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.39-40.641 ◽

2008 ◽

Vol 39-40 ◽

pp. 641-646

Author(s):

K. Gitzhofer

Keyword(s):

Gas Flow ◽

Raw Materials ◽

Glass Melting ◽

Alkaline Solutions ◽

Exhaust Gas ◽

Boron Compounds ◽

Waste Gas ◽

Gaseous Fraction ◽

Run Up ◽

Control Technologies

For boron containing glasses, you have to consider a gaseous fraction in the exhaust gas besides the particulate boron compounds. Within the framework of a research project finished in the year 2005 investigations into the emission of particulate and gaseous boron compounds were carried out on 18 glass melting furnaces with boron containing batch. The plants are different with regard to the molten glasses, furnace type, type of firing as well as downstream emission control technologies. The precipitation of particulate boron compounds is unproblematic. The precipitation of gaseous boron compounds is clearly more difficult and further measures have to be taken in respect of the effective precipitation. In a current follow up project, especially the reduction potential of gaseous boron compounds is investigated through the installation of a high temperature sorption stage (injection of fine-ground glass raw materials into the exhaust gas flow behind the superstructure at exhaust gas temperatures of 1400 °C) and/or the injection of alkaline solutions into the waste gas at lower temperatures. Investigations in the exhaust gas of E-glass melters were carried out successfully. Reduction rates of more than 95 % could be proved for gaseous boron compounds. The activities are supported by thermo-chemical calculations in the run up and during the measurements.

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MATHEMATICAL MODELING OF OPTIMIZED RECEPTURAL OF LOW-LACTOSE SYNBIOTIC YOGHOURT ICE CREAM

Animal Science and Food Technology ◽

10.31548/animal2020.02.083 ◽

2020 ◽

Vol 11 (2) ◽

pp. 73-82

Author(s):

А. Trubnikova ◽

О. Chabanova ◽

S. Bondar ◽

Т. Sharakhmatova ◽

Т. Nedobijchuk

Keyword(s):

Concentration Factor ◽

Raw Materials ◽

Ice Cream ◽

Test Sample ◽

Protein Concentrate ◽

Important Indicator ◽

Free Protein ◽

Mass Fractions ◽

New Type ◽

Main Components

Optimization of the formulation of synbiotic yogurt ice cream low-lactose using lactose-free protein concentrate of buttermilk and yogurt with low lactose content is the goal of expanding the range of low-lactose dairy products and improving the functional and health properties of ice cream. Low-lactose ice cream formulation optimization was performed using a gradient numerical method, namely conjugated gradients (Conjugate Gradient). The optimization algorithm is implemented in Mathcad. An array of data with a set of indicators for the choice of a rational ratio of lactose-free protein concentrate of buttermilk and yogurt base and inulin content for ice cream mixtures is presented. The influence of the ratio of the main components of the mixtures on the foaming ability, which determines the quality of the finished product, has been studied. An important indicator is taken into account - the concentration factor of buttermilk, which is additionally purified from lactose by diafiltration. The graphic material presented in the work clearly demonstrates that the rational ratio of yogurt base and lactose-free protein concentrate of buttermilk, obtained by ultrafiltration with diafiltration purification at a concentration factor of FC = 5 is 40.6: 59.4. The content of additional components included in the recipe of a new type of ice cream is optimized in the work, the mass fractions of which were: inulin - 3.69 %; lactulose – 1 %; ginger - 0.3 %; citric acid - 0.15 %; stabilization system - 0.2 %. The chemical composition and quality indicators of the mixture for ice cream low-lactose synbiotic yogurt, consisting of raw materials in the optimal ratio, were determined. The lactose content in the test sample of the ice cream mixture was 0.99%, the antioxidant activity was 3.1 times higher than in the mixture for traditional yogurt ice cream. The most likely number of lactic acid microorganisms, CFU / cm3 is (2.8 ± 0.9) · 108, the number of bifidobacteria, CFU / cm3 is (2.5 ± 0.2) · 109. The results of the research will be implemented in dairy companies in the production of ice cream.

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Advanced Kinetic Modeling of Bio-co-polymer Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Production Using Fructose and Propionate as Carbon Sources

Processes ◽

10.3390/pr9081260 ◽

2021 ◽

Vol 9 (8) ◽

pp. 1260

Author(s):

Stefanie Duvigneau ◽

Robert Dürr ◽

Jessica Behrens ◽

Achim Kienle

Keyword(s):

Kinetic Model ◽

Kinetic Modeling ◽

Feed Rate ◽

Raw Materials ◽

Carbon Sources ◽

Exhaust Gas ◽

Current Yield ◽

Promising Alternative ◽

Parameter Variations ◽

Online Measurements

Biopolymers are a promising alternative to petroleum-based plastic raw materials. They are bio-based, non-toxic and degradable under environmental conditions. In addition to the homopolymer poly(3-hydroxybutyrate) (PHB), there are a number of co-polymers that have a broad range of applications and are easier to process in comparison to PHB. The most prominent representative from this group of bio-copolymers is poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV). In this article, we show a new kinetic model that describes the PHBV production from fructose and propionic acid in Cupriavidus necator (C. necator). The developed model is used to analyze the effects of process parameter variations such as the CO2 amount in the exhaust gas and the feed rate. The presented model is a valuable tool to improve the microbial PHBV production process. Due to the coupling of CO2 online measurements in the exhaust gas to the biomass production, the model has the potential to predict the composition and the current yield of PHBV in the ongoing process.

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