Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing liquid or solid sample
Patent
1996-08-05
1998-03-03
Le, Long V.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing liquid or solid sample
422 681, 422100, 436 43, 436 52, 436174, 436180, 73863, 7386331, 7386381, G01N 120
Patent
active
057230935
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an apparatus for continuously sampling and analyzing a liquid effluent, e.g. from an industrial installation.
Most industrial installations discharge effluents, which are subject to ever stricter monitoring by the public authorities and to ever stricter environmental discharge standards. More particularly in industrial chemical treatment plants (e.g. surface treatment), in chemical industries or in nuclear centres, the quantity of anions and cations present in the industrial effluents must be measurable in both a precise and time-regular manner.
At present, e.g. in a nuclear centre, all water from different buildings within the centre is collected in a collecting basin with a capacity of about 100 m.sup.3, followed by the treatment thereof. Such water comes both from sanitary installations and laboratories and e.g. consists of water used in production processes, water used in cooling or recycled water, i.e. water used in e.g. heat exchangers. In the collecting basin located within the water treatment station, said water undergoes a flocculation treatment with the aid of iron sulphate and lime, followed by the settling of the sludge. All these operations are performed accompanied by stirring, e.g. by injecting air bubbles. The aim of this treatment is to eliminate the heavy metals. Following this treatment, the water is collected in a secondary basin, where analysis takes place, prior to the discharge thereof into the environment. This analysis is usually performed manually on the basis of one or two daily sampling operations carried out in said secondary basin. Each sample is analyzed, e.g. using a plasma torch coupled to a mass spectrometer. These methods make it possible to measure several elements present in a sample.
This effluent discharge monitoring procedure is obviously very imprecise, because it does not take account of the evolution of the composition of the discharges during the day, which can sometimes be very important. It also has a relatively long reaction time between the moment when a polluted effluent enters the secondary basin and the moment when the pollution is detected.
The evolution of effluent treatment methods and in particular the appearance of the so-called "streamline" treatment has led to a different procedure being adopted in the checking of discharges. Thus, spent water from different points (e.g. different buildings within a nuclear centre) will be collected in a buffer basin, where all the aforementioned water treatment operations will be carried out and then the treated water from the different buffer basins will be collected in a storage basin prior to discharge into the environment. The checking and analysis of the effluents will take place in a streamline manner, i.e. in the pipe between one of the buffer basins and the storage basin and this will be performed continuously. It is therefore desirable to develop an apparatus making it possible to very rapidly and precisely detect a variation in the concentration of elements polluting a discharge, so as to be able to immediately isolate the polluted effluent and recycle it in the buffer basin for a second water treatment.
At present, the apparatuses used for the analysis of industrial effluents, such as ionic chromatographic equipment or capillary electrophoresis equipment do not permit working on a continuous sample of said effluent. In fact, they are designed to function on samples collected from test tubes and the latter are placed on a turntable so that said samples are brought in turn in front of the sampling means thereof. This leads to an extremely long, manual manipulation incompatible with a continuous effluent monitoring. The object of the invention is to solve this problem.
The invention therefore relates to an apparatus for the continuous sampling and analysis of a liquid effluent.
According to the features of the invention, said apparatus comprises: analyzed in the direction of first distribution means, to the inlet of a sampling cell, least one measuring device and designed so as to s
REFERENCES:
patent: 3798972 (1974-03-01), Collins, Jr.
patent: 3929411 (1975-12-01), Takano et al.
patent: 4795713 (1989-01-01), Koop et al.
patent: 4800763 (1989-01-01), Hakkers et al.
patent: 4873057 (1989-10-01), Robertson et al.
patent: 5073505 (1991-12-01), Nalette et al.
patent: 5077017 (1991-12-01), Gorin et al.
patent: 5101670 (1992-04-01), Steger et al.
De Bruyne Thierry
Juhel Thierry
Leduc Eric
Commissariat a l''Energie Atomique
Le Long V.
LandOfFree
Apparatus for the continuous sampling and analysis of a liquid e does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for the continuous sampling and analysis of a liquid e, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for the continuous sampling and analysis of a liquid e will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2245393