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Experiments On Additive Desulphurisation By Sodium Bicarbonate In Coal-Fuel Boilers

100%

Kolat P., Čech B., Vrtek M., Tomášek D.

Chemical and Process Engineering

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2013

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vol. 34

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issue 1

77-86

EN

This paper describes experiments on the application of sodium bicarbonate desulphurisation in the coal-fuel boiler. The boiler has been in operation for several years now and it has refiably fulfilled the original assignment to reduce SO2 emissions from the value of 1200 - 1500 mg/Nm3 to 400 mg/Nm3. Higher desulphurisation efficiency is determined only by the ratio of Na/S sorbent dosage. The resulting product of desulphurisation is stored together with fly ash in underground mines, and has no influence on the groundwater. Positive experience of the tests and boiler operation lies in higher reactivity of sodium and sulphur as compared with conventional methods based on limestone. Within the scope of the secondary measures of elimination of sulphur oxides in combustion products, an experimental dry-method desulphurisation of combustion products was performed by blasting an agent containing sodium bicarbonate NaHCO3 (99.6 %) into the flue ways before the electrostatic precipitator in a coal-fuel furnace with the steam output of 220 t/h.

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Experiments On Additive Desulphurisation By Sodium Bicarbonate In Coal-Fuel Boilers

88%

Kolat P., Čech B., Vrtek M., Tomášek D.

Chemical and Process Engineering

|

2013

|

issue 1

3

Dual concentration in karate and its use in diagnosis of sport

75%

Pivovarník J.

Physical Activity Review

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2016

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vol. 4

81-88

EN

Introduction: The goal of our study was to identify and compare impact of specific dual focus of concen tration known in Goju - ryu school as a system of KZR (closed hands kata) - heishu, conce ntration inside the body versus KOR (open hands kata) - kaishu, conce ntration outside of the body . Method: . St udysample consisted of Karate Dojo Pivovarník karateka from Hanušovce nad Topľou, Slovak republic (n=7, 6 m en and 1 woman), all of them were holders of at least . 1 st . Dan maste r grade, they were able to practice in dual focus. We h ave compared the trainings performed by both system s KZR vs. KOR while respecting relatively identical co nditions. At the same time we observed physiologi cal, biochemical and somatic indicators. P articipants completed a questionnaire , consent form and filled out personality questionna ire . The data were evaluated with statistical programs MS Excel, SPSS Statistics, bio chemical results were obtained in laboratory Synlab Sl ovakia s.r.o, Prešov and the data were ca lculated by Dorste, Planta  14  . To determine the significance of difference s at entrances and exits KZR vs. KOR we used the Mann - Whitne U – test and Wilco xon test . S tatis tical significance was set at (p < 0. 01 , p < 0.05). Result: We assumed that the dual concentration will not ca use any significant differences from training KZR com pare to KOR. However, that was not confirmed. We have detected several statistically significant physiological biochemical and somatic differences. Summary: Our results po int to the possibility of efficiency gains and prediction in g training (performance, i ntensity etc. ). Nevertheless, this pilot study does not allow the results to be generalized for relatively small sample size , and the number of such studies, in spite of thisour study points out the high potential and possible future objectification.

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2 Chemical and Process Engineering

1 Physical Activity Review

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2 Kolat P.

2 Tomášek D.

2 Vrtek M.

2 Čech B.

1 Pivovarník J.

Experiments On Additive Desulphurisation By Sodium Bicarbonate In Coal-Fuel Boilers

Experiments On Additive Desulphurisation By Sodium Bicarbonate In Coal-Fuel Boilers

Dual concentration in karate and its use in diagnosis of sport