BMA Braunschweigische Maschinenbauanstalt AG
BMA Braunschweigische Maschinenbauanstalt AG
BMA Braunschweigische Maschinenbauanstalt AG | Date: 2017-08-02
The invention relates to a method and an arrangement for wastewater treatment, in which at least portions of the sewage sludge contained in the wastewater (0) are subjected to a hydrolysis (8). The hydrolysis (8) is carried out as a thermal hydrolysis. After the hydrolysis step (8), a drying process is (19) carried out. The drying process (19) is a process operating with positive pressure in the steam region. At least parts of the steam resulting from the drying process (19), which operates with positive pressure, are fed (20) to the portions of the sewage sludge in the thermal hydrolysis (8).
Bma Braunschweigische Maschinenbauanstalt Ag | Date: 2015-03-09
The present invention relates to a device for removing fluids and/or solid substances from a mixture of particle-shaped materials with a container which forms a ring-shaped process chamber with a plurality of cells separated from each other by walls, comprising an inlet cell, intermediate cells and an outlet cell, a feeding installation for conveying the mixture to be treated into the inlet cell of the process chamber, a discharge installation for discharging the mixture treated from the outlet cell of the process chamber, a ventilation installation for feeding in a first fluidisation agent, in particular in the form of overheated vapour, from below into the process chamber through an inflow floor for generating a fluidised bed in the process chamber, a heating installation for preparing the first fluidisation agent in the flow direction before the ventilation installation, swirl impellers for conditioning the flow in the container from the process chamber to the heating installation and which in part also leads to a vapour outlet, and a dust removal installation in the flow path between the process chamber and the heating installation, wherein dust can be guided to the outlet cell via the dust removal installation, wherein in order to support a transportation of the mixture from the inlet cell to the outlet cell and/or a turbulence of the mixture in the process chamber, the inflow floor comprises first unevenness and/or at least at times a second fluidisation agent, in particular in the form of overheated vapour, can be fed at least into the inlet cell essentially parallel to the inflow floor by means of first nozzles, and/or first flow guidance members are provided above the inflow floor and/or second flow guidance members are provided below the inflow floor.
BMA Braunschweigische Maschinenbauanstalt AG | Date: 2017-03-08
The present invention relates to an apparatus (1000) for removing fluids and/or solids from a mixture of particulate materials, having a container (21) which forms a ring-shaped process chamber (23) with a multiplicity of cells separated from one another by walls (25), said cells comprising an inlet cell (201), intermediate cells and an outlet cell (202), having an introduction device (1) for the introduction of the mixture for treatment into the inlet cell (201) of the process chamber (23), having a discharge device (3) for the discharge of the treated mixture out of the outlet cell (202) of the process chamber (23), having a fan device (7, 7) for feeding a first fluidization medium, in particular in the form of superheated steam, into the process chamber (23) from below through an inflow base (24, 24, 24, 24) in order to generate a fluidized bed (2) in the process chamber (23), having a heating device (6) for the preparation of the first fluidization medium upstream of the fan device (7, 7) as viewed in the flow direction, swirl blades (29) for conditioning the flow (110-160) in the container (21) from the process chamber (23) to the heating device (6) and, in part, to a vapour outlet (5), and having a dust extraction device (4) in the flow path between the process chamber (23) and the heating device (6), wherein, by way of the dust extraction device (4), dust can be conducted to the outlet cell (202), and to assist transportation of the mixture from the inlet cell (201) to the outlet cell (202) and/or a swirling of the mixture in the process chamber (23), the inflow base (24) has first unevennesses (342), and/or a second fluidization medium, in particular in the form of superheated steam, can at least intermittently be fed at least into the inlet cell (201) substantially parallel to the inflow base (24) by means of first nozzles (302), and/or first flow-guiding elements (303) are provided above the inflow base (24) and/or second flow-guiding elements (501, 502, 503, 600, 700) are provided below the inflow base (24, 24, 24).
Both S.,Clausthal University of Technology |
Eggersgluss J.,Clausthal University of Technology |
Lehnberger A.,BMA Braunschweigische Maschinenbauanstalt AG |
Schulz T.,BMA Braunschweigische Maschinenbauanstalt AG |
And 2 more authors.
Chemical Engineering and Technology | Year: 2013
Extraction of sugar from sugar beets is a process optimized over decades based on experience gathered during production. This process improvement is achieved without any systematic approach for optimization which raised the question whether such a mature process can be further optimized effectively, applying methods developed in the last decade like statistical experiment design or physicochemical modeling. Viable areas of operation for the respective approaches will be assessed and discussed using the example of sucrose extraction from sugar beet. Operating conditions are optimized regarding extraction kinetics and equilibrium behavior. Physicochemical modeling, however, requires detailed information on phase equilibria, fluid dynamics, and mass transfer effects. Here, the phase ratio can be identified as a sensitive parameter and process performance like the HETP (high equivalent of a theoretical plate) value can be enhanced. Therefore, the volumetric productivity serves as indicator. Potentials of process design and process optimization by a combination of statistical design of experiments and physicochemical modeling approaches are assessed, and respective possibilities and limitations are discussed. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Stiegert S.,BMA Braunschweigische Maschinenbauanstalt AG |
Geyer I.,BMA Braunschweigische Maschinenbauanstalt AG |
Spangenberg D.,BMA Braunschweigische Maschinenbauanstalt AG |
Lehnberger A.,BMA Braunschweigische Maschinenbauanstalt AG
International Sugar Journal | Year: 2012
For many decades, centrifugals have been absolutely vital for sugar production. In the course of time, their design and features have been modified and upgraded many times. Could it therefore be that they have reached the final stage of development? BMA's new batch centrifugal of the E-series is setting an impressive example of how much potential for development an already highly sophisticated product still offers: As before, the sugar is spun to separate the sugar crystals from the mother liquor but the subtle difference is in the detail. This article explains what concrete benefits users will derive from the latest technical and technological insights that have been incorporated into this generation of BMA centrifugals. First practical experience confirms the success that this consistent development has brought.
Hafemann H.,BMA Braunschweigische Maschinenbauanstalt AG |
Griebel H.,BMA Braunschweigische Maschinenbauanstalt AG
Zuckerindustrie | Year: 2012
BMA develops and builds equipment for drying and cooling sugar since quite a number of decades. The following products came out of this long period like the drum dryer/cooler and horizontal fluidised bed cooler. The latest application is BMA's vertical fluidised bed cooler, type VFC, which has been installed and successfully been taken into operation e.g. at Imperial Sugar, Savannah USA. This paper focuses on the importance of taking into account the individual requirements and specific ambient conditions to adequately choose the drying and cooling equipment.
Bma Braunschweigische Maschinenbauanstalt Ag | Date: 2010-05-14
A continuously operating centrifuge serves for centrifuging sugar massecuites. it has elements (20, 30, 40, 50) which rotate about a common axis (16). Furthermore, there is provided a drive unit (70), an outer housing incorporating a framework (10) having a base (11) and side walls (12) and vibration damping elements (82). An inner housing (80) is provided around the elements (20, 30, 40, 50) rotating about the common axis (16). The vibration damping elements (82) are arranged between the inner housing (80) and the base (11) of the framework (10) of the outer housing.
Bma Braunschweigische Maschinenbauanstalt Ag | Date: 2010-05-14
A continuously operating centrifuge for centrifuging sugar massecuites has an upwardly flaring conical sieve basket (20) which rotates about a vertical axis (16). A product distributor (40) flares downwardly and extends into the bottom region of the sieve basket (20). The product distributor (40) is substantially coaxial with respect to the sieve basket (20), has a discharge rim and rotates about the same vertical axis (16) as the sieve basket (20). Within and in the upper region of the product distributor (40), there is provided a distributor pot (30) which serves as a feeding device for the sugar massecuites in the axial region of the centrifuge. The peripheral wall of the product distributor (40) is divided up into a plurality of ring elements (41, 42, 43) which overlap in the direction of the axis (16) and the internal diameters of which differ from each other. A bell (50) surrounds the product distributor (40) and flares conically downwardly. A device (61, 62) incorporating air directing elements is provided between at least two of the ring elements (41, 42, 43) of the product distributor (40).
BMA Braunschweigische Maschinenbauanstalt AG | Date: 2012-11-20
A discontinuous centrifuge consists of a rotatable centrifuge drum incorporating a drive spindle, a casing and a base. A hub of the centrifuge drum comprises a plurality of arms for the indirect or direct connection of the casing of the centrifuge drum to the drive spindle of the centrifuge drum. A scraper serves for scraping a product off the inner wall of the casing of the rotatable centrifuge drum. The scraper comprises an element which is pivotal about an axis, which axis extends in parallel with the axis of rotation of the centrifuge drum. The element comprises a blade which extends over almost the entire height of the centrifuge drum and makes contact with the product after the pivotal movement. The scraper is not moveable vertically. The arms of the hub have upper surfaces which are located below the drum base. The scraper is mounted independently of the swinging suspension of the centrifuge drum.
Bma Braunschweigische Maschinenbauanstalt Ag | Date: 2013-03-13
A device having a centrifuge operating discontinuously in batch-type manner for separating syrup from sugar massecuites including a centrifuge housing having a wall and a base, as well as a cylindrical centrifuge drum in a centrifuge housing having discharge openings. A first receiving container serves for the reception of a green discharge. A second receiving serves for the reception of a white discharge. A control device and valve or shut-off assemblies controllable by the control device are provided at or in the discharge opening or in connecting lines for the purposes of separating the green discharge and the white discharge. At least one sensor is provided in the transport path of the syrup. The sensor includes a measuring device for the measurement of a physical value which is representative of the difference between green discharge and white discharge. The control device controls the valve or shut-off assemblies in dependence on the measured values of the physical value transmitted by the sensor.