RVT Process Equipment GmbH

Steinwiesen, Germany

RVT Process Equipment GmbH

Steinwiesen, Germany
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Bauer M.,University of Bayreuth | Hopf N.,Nurnberg University of Applied Sciences | Hofstetter E.,RVT Process Equipment GmbH | Peiffer S.,University of Bayreuth
Chemie-Ingenieur-Technik | Year: 2013

An innovative, technical approach for the reduction of CO2 emissions is presented that utilizes alkaline wastes to capture CO2 from flue gases in stable mineral form. Comprehensive pilot-scale experiments were conducted with the developed flue gas scrubbing system at a power plant site. By optimizing the process parameters gas flux, CO2 partial pressure, circulation flux and suspension liquid-to-solid ratio, a CO 2 binding of 40-90 g kg-1 waste could be reached and up to 25 % of the CO2 could be captured. The new technique is economically advantageous especially when both alkaline waste and CO2 are produced on site and when the carbonated products can be used as secondary resources. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Wolf V.,University of Leoben | Lehner M.,University of Leoben | Hoffmann K.,RVT Process Equipment GmbH
Chemical Engineering Research and Design | Year: 2015

The standardisation of mass transfer measurements for absorption systems is a key factor for the deduction of accurate mass transfer models for random and structured packing. Several papers (Hoffmann et al. (2007). Trans IChemE, A, 85 (A1), 40; Kunze et al. (2012). Chem. Ingen. Techn., 84, 1931; Rejl et al. (2009). Chem. Eng. Res. Des., 87, 695) already deal with this problem and recommendations are given for appropriate test systems, the execution of the experiments and particularly also for the experimental setup to be used. However, systematic investigations of the influences of the experimental setup configuration on the results of mass transfer measurements in absorption systems are published rarely.Mass transfer measurements with the system ammonia-air/water have been performed at a pilot plant consisting of a DN 600 saturation column and a DN 450 measuring column, both made from polypropylene, and equipped with different random and structured packing. Although the used experimental setup of the pilot plant follows strictly the recommendations published in Hoffmann et al., experimental results may differ significantly depending on, for example, the locations of the gas and liquid sampling in the column, the raw gas concentrations of ammonia or the pre-treatment of packing.The paper presents the results of the test series considering different effects on the derived mass transfer performance of the packing and addresses also problems as well as solutions concerning the sampling in a two-phase regime. The aim is to provide a valuable contribution to the efforts for the standardisation of mass transfer measurements in absorption systems. © 2015 The Institution of Chemical Engineers.


Wolf V.,University of Leoben | Lehner M.,University of Leoben | Hoffmann K.,RVT Process Equipment GmbH
Kister Distillation Symposium 2015 - Topical Conference at the 2015 AIChE Spring Meeting and 11th Global Congress on Process Safety | Year: 2015

If a new packing is developed and introduced to the market, a reliable calculation of the properties is hard to perform as the known correlations are not able to consider all the special influences of the geometrical properties of a packing. Therefore, the published hydraulic models only work acceptable for validated packing types. To ensure a good rating of a newly developed packing for different application areas, a reliable forecast of the hydraulic properties has to be guaranteed. Therefore, the following models from literature have been examined on their ability to model a newly developed grid-structured packing: SRP-Model, Delft-Model, NNA-Model of Piché et al., Billet and Schultes-Model, Maćkowiak-Model and Stichlmair-Engel-Model. Unfortunately, none of them is able to calculate the hydraulic properties of the grid structured packing satisfactorily. The best modelling results could be reached with the model of Billet and Schultes. As a result of that and the fact that the Billet and Schultes-Model is applicable for structured as well as for random packing, it was examined more in more detail. Due to a relatively simple but physically justified modification of the Billet and Schultes-Model good modelling results can be reached. Furthermore, it can be shown that this adjustment also leads to a better prediction of the wet pressure drop of further examined packing types. Moreover, the area of validity of the Billet and Schultes-Model of 0.61 - 60 m3/(m2∗h) can be extended to an irrigation density of 120 m3/(m2∗h) for the calculation of the wet pressure drop.


Lehner M.,University of Leoben | Hoffmann K.,RVT Process Equipment GmbH | Geipel W.,RVT Process Equipment GmbH
Heat and Mass Transfer/Waerme- und Stoffuebertragung | Year: 2011

The hydraulic and mass transfer characteristic of a novel grid-structured plastic packing is presented. The geometry of this structured packings differ substantially from conventional corrugated structured packings resulting in an open structure which enables a free exchange of vapour and liquid also in horizontal direction. The hydraulic performance has been measured by air-water experiments in a 440 mm diameter column, the mass transfer characteristic has been determined with the absorption system ammonia-air-water. Is is shown that the grid-structured plastic packing is highly efficient, particularly in terms of the hydraulic capacity compared with random plastic packings. Beside this, the main advantage of the packing is the easy handling and installation as well as the low investment costs compared to the well-known conventional corrugated structured packings. © 2011 Springer-Verlag.


Patent
RVT Process Equipment GmbH | Date: 2015-10-09

A process-technology column including a novel liquid distributor which is to be as insensitive as possible to dirt or solids carried in the liquid and which can be operated over a load range as great as possible without the possibility of the delivered liquid being excessively easily entrained by the gas flow which rises in the column is provided. The liquid distributor includes a liquid feed for conducting a liquid and at least 2 nozzles connected thereto for producing a respective liquid jet. The nozzles are flat-jet nozzles for producing a respective flat jet. The flat-jet nozzles are so oriented that the flat jet produced by them impinges on a drain element which is arranged at the liquid distributor and at which the liquid of the flat jet can drain away.


Patent
RVT Process Equipment GmbH | Date: 2013-06-10

A low-load distributor is disclosed for mass transfer columns for applying liquid onto the surface of packing stages of the mass transfer columns with at least one liquid supply, a plurality of liquid dispensing points and dwell time delay devices disposed between the liquid supply and the liquid dispensing points. An exemplery low-load distributor can be easily manufactured for a very low liquid flow rate and is characterized by high operation reliability. A dwell time delay devices can include absorbent open-pored storage material and the flow resistance of the storage material can increase in the liquid flow direction, starting from the liquid supply in the direction towards the liquid dispensing points.


Patent
RVT Process Equipment GmbH | Date: 2015-10-09

A process-technology column including a novel liquid distributor which is to be as insensitive as possible to dirt or solids carried in the liquid and which can be operated over a load range as great as possible without the possibility of the delivered liquid being excessively easily entrained by the gas flow which rises in the column is provided. The liquid distributor includes a liquid feed for conducting a liquid and at least 2 nozzles connected thereto for producing a respective liquid jet. The nozzles are flat-jet nozzles for producing a respective flat jet. The flat-jet nozzles are so oriented that the flat jet produced by them impinges on a drain element which is arranged at the liquid distributor and at which the liquid of the flat jet can drain away.


The invention relates to a corrugated packing grid with consecutively arranged wave crests and wave troughs for a structured packing, which is assembled from several packing grids, for gas-liquid contacting apparatuses, and to a packing assembled from said packing grids. The aim of the invention is to provide a packing grid and a packing which have a large mass transfer area and a low pressure drop at the same time and which offer a high mechanical strength. According to the invention, this is achieved in that elements lie in the region of the wave troughs of the packing grid, said elements extending into the wave troughs.

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