Separation of gaseous air pollutants using membrane contactors

Svěrák, Tomáš; Bulejko, Pavel; Ostrezi, Jakub; Krištof, Ondřej; Kalivoda, Josef; Kejı́k, Pavel; Mayerová, Karolína; Adamčík, Martin

doi:10.1088/1755-1315/92/1/012061

Cited by 12 publications

(7 citation statements)

References 1 publication

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“…This is very important due to associated health and environmental concerns [18,19]. Comparing the ability to remove particulate and gaseous pollutants, gas scrubbers have lower efficiency in one cleaning cycle but are able to treat a significantly higher amount of polluted air compared to, for example, air filtration or membrane contactors [20][21][22][23]. In these applications, filter/membrane causes additional resistance to airflow, thus disabling processing of huge amounts of polluted air generated in large-scale industrial processes.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Spray Breakup in Turbulent Atomization Using a Spiral Nozzle

2019

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Spiral nozzles are widely used in wet scrubbers to form an appropriate spray pattern to capture the polluting gas/particulate matterwith the highest possible efficiency. Despite this fact, and a fact that it is a nozzle with a very atypical spray pattern (a full cone consisting of three concentric hollow cones), very limited amount of studies have been done so far on characterization of this type of nozzle. This work reports preliminary results on the spray characteristics of a spiral nozzle used for gas absorption processes. First, we experimentally measured the pressure impact footprint of the spray generated. Then effective spray angles were evaluated from the photographs of the spray and using the pressure impact footprint records via Archimedean spiral equation. Using the classical photography, areas of primary and secondary atomization were determined together with the droplet size distribution, which were further approximated using selected distribution functions. Radial and tangential spray velocity of droplets were assessed using the laser Doppler anemometry. The results show atypical behavior compared to different types of nozzles. In the investigated measurement range, the droplet-size distribution showed higher droplet diameters (about 1 mm) compared to, for example, air assisted atomizers. It was similar for the radial velocity, which was conversely lower (max velocity of about 8 m/s) compared to, for example, effervescent atomizers, which can produce droplets with a velocity of tens to hundreds m/s. On the contrary, spray angle ranged from 58° and 111° for the inner small and large cone, respectively, to 152° for the upper cone, and in the measured range was independent of the inlet pressure of liquid at the nozzle orifice.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Spray Breakup in Turbulent Atomization Using a Spiral Nozzle

2019

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“…PHFHE can be applied in such fields as heat recovery systems [6], evaporative cooling systems, desiccant cooling systems, and electronic device cooling [7], [8]. Also, PHFHEs with a membrane polymeric hollow fibers can be applied for filtration processes, chemical separation or medical treatment [9][10][11]. Most commercially available polymer heat exchangers can be used in low temperature applications.…”

Section: Introductionmentioning

confidence: 99%

Testing of Polymeric Hollow Fibre Heat Exchanger with Crossed Hollow Fibres

Bartuli¹,

Kroulíková²

2019

Proceedings of the 5th World Congress on Mechanical, Chemical, and Material Engineering

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The results of the development and experimental investigation of a polymeric hollow fibre heat exchanger are presented. A heat exchanger of a shell-and-tube type with an outer diameter of 80mm and a length of 350mm containing 2200 206mm-long polyamide hollow fibres with an outer diameter of 0.8mm cross-wound at an angle to the axis of the heat exchanger. Cross-winding was realized with the help of the modified winding system X-Winder. Cold water with a temperature of 13°C and a constant flow rate of 2160l/h was fed through the hollow fibres. The dependences of heat transfer characteristics on the shell fluid temperature and fluid flow rate are presented. The device was able to transfer 38kW at a shell water temperature of 70°C and a shell fluid flow rate of 800l/h. In these conditions, the maximum overall heat transfer coefficient reaches 1950W/m²K.

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“…These membranes have the same advantages as polymer hollow fibre heat exchangers and can be used for example in filtration processes, chemical separation or for medical treatment. [8], [9], [10]…”

Section: Introductionmentioning

confidence: 99%

Life Expectancy of Polymeric Hollow Fibre Heat Transfer Surfaces

Brožová¹,

Kroulíková²

2019

Proceedings of the 5th World Congress on Mechanical, Chemical, and Material Engineering

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This article deals with polymer hollow fibre heat exchangers as an alternative to the common metal heat exchangers. These heat exchangers are made of hundreds or even thousands of polymer hollow fibres. The heat exchangers provide such benefits as low weight, corrosion resistance, and easy shaping and machining. Moreover, they are environmentally friendly. These fibres are the key part of such heat exchangers. Therefore, it is necessary to ensure their durability during their lifetime. The paper shows tests the life expectancy of hollow fibres by internal pressure loading. The tests are performed in a water bath at a temperature of 80°C. This simulates the operating conditions of the heat exchangers.

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Separation of gaseous air pollutants using membrane contactors

Cited by 12 publications

References 1 publication

Experimental Study on Spray Breakup in Turbulent Atomization Using a Spiral Nozzle

Experimental Study on Spray Breakup in Turbulent Atomization Using a Spiral Nozzle

Testing of Polymeric Hollow Fibre Heat Exchanger with Crossed Hollow Fibres

Life Expectancy of Polymeric Hollow Fibre Heat Transfer Surfaces

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