Device and method for removing a liquid from a process container
A process container and liquid technology, applied in the system field of the device, can solve the problem that the penetration of non-sterilized substances is not excluded.
Active Publication Date: 2015-10-28
ENDRESSHAUSER CONDUCTA GMBHCO
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Problems solved by technology
Furthermore, in the case of a leak in the membrane, or in the case of a sampling probe containing the membrane, here if the washing liquid and the compressed air become contaminated due to a leak in the tube or a malfunction of the sterilizing filter, unless Penetration of bacterial material into the container may not be ruled out
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[0106] Figure 1a Schematically shows the pressure difference Δp due to the hydrostatic pressure prevailing at the end of the liquid line normally opening into the vessel i, regardless of the gas pressure Hydro,i association. This is derived from the hydrostatic pressure p Hydro,Leitung,i and the hydrostatic pressure across the column of liquid outside the line in vessel i The difference between is calculated.
[0107] Figure 1b Schematically shown are means for drawing liquid from a process vessel 1 and transferring it to a receptacle 9 which receives the drawn liquid 10 . The process vessel 1 is connected to a receiver 9 via a liquid line 2 having a first end connected to the process vessel 1 and a second end leading to the receiver 9 . In this example, the first end of the liquid line 2 is designed as a standpipe descending into the liquid contained in the process vessel. Effective hydrostatic pressure difference Δp Hydro-eff by Δp Hydro,1 and Δp Hydro,2 The diffe...
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The invention relates to a device for removing a liquid from a process container (1), in particular a process container to be protected against contamination, comprising: a first collection vessel (9) for accommodating the liquid (10) removed from the process container (1); a first liquid line (2), which connects the process container to the first collection vessel (9) and which has a first end that can be connected to the process container (1) and a second end that leads into the first collection vessel (9); and at least one first valve assembly (3), which is arranged between the first end and the second end of the first liquid line (2) and which is designed to alternatively block or allow liquid transport through the first liquid line (2), the device comprising at least one pressure sensor (6), which is connected to the first collection vessel (9), in particular in order to detect a pressure present in the first collection vessel (9), and / or is arranged at the second end of the first liquid line (2), the device being designed to transport liquid from the process container (1) into the first collection vessel (9) in a first operating mode, characterized in that the device is designed to block liquid transport from the process container (1) into the first collection vessel (9) in a second operating mode, the device being designed in such a way that there is a pressure difference (P1-P2) between the first end and the second end of the first liquid line (2) that is greater than or equal to zero, in particular greater than a specified permissible minimum value, both in the first operating mode and in the second operating mode and so long as the first end of the first liquid line (2) is connected to the process container (1) and the process container (1) is to be protected against contamination.
Description
technical field [0001] The invention relates to a device and a method for drawing liquid from a process vessel. The invention also relates to a system comprising means for drawing liquid from a process vessel and means for treating the drawn liquid. Background technique [0002] Automatic or semi-automatic analytical measuring systems are used in analytical measurement technology, for example in industrial chemistry, biotechnology, pharmaceutical and food technology processes, in laboratories and in environmental monitoring. These are generally designed to pretreat the liquid sample to be analyzed (optionally, with the addition of reagents) so that in the presence of the analyte in the sample, a chemical reaction occurs which is detectable by means of physical, eg optical, methods. The analyte content of a sample can be determined, for example, by illuminating a liquid sample with electromagnetic radiation (eg visible light) from a radiation source, and the reflected radiat...
Claims
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IPC IPC(8): G01N1/14C12M1/26G01N1/10
CPCG01N1/14C12M33/12G01N2001/1037G01N2001/1445C12M37/00G01N1/28G01N2001/1025G01N2001/1418
Inventor 安哥拉·奥比施迈克尔·汉克托马斯·赫内梅拉妮·米勒托马斯·施特肯赖特
Owner ENDRESSHAUSER CONDUCTA GMBHCO