Liquid purification or separation – With gas separator
Patent
1994-11-10
1996-10-15
Hruskoci, Peter A.
Liquid purification or separation
With gas separator
2101953, 210197, 210220, 210255, 210262, 2105121, C02F 328, C02F 322, B01D 1900
Patent
active
055650988
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a reactor for the biological treatment of water, comprising a reactor vessel, a fermentation chamber bounded in said vessel, means for introducing influent into the fermentation chamber, a settling chamber above the top boundary of the fermentation chamber, for separating out sludge from treated water, a downer extending downwards from the settling chamber through the fermentation chamber, for returning separated-out sludge to the fermentation chamber, and means for discharging effluent from the settling chamber.
BACKGROUND OF THE INVENTION
Such reactors are known for both aerobic and anaerobic treatment of water. An example of an embodiment for anaerobic treatment is described in U.S. Pat. No. 4,609,460.
A driving force for the downward flow of recirculation water and sludge is obtained by producing a gas lift effect in such a treatment (in which case the gas-containing liquid outside the downer is lighter than the non-gas-containing liquid in the downer).
SUMMARY OF THE INVENTION
The object of the invention is to provide a simple way of improving the separation of sludge from effluent and also the circulation in the reactor.
According to the invention, for this purpose the reactor is characterised in that at least one liquid and/or gas supply line opens out in the settling chamber by way of a tangential discharge end, for producing a whirlpool in said settling chamber.
SUMMARY OF THE INVENTION
The whirlpool effect arising through the tangential supply of gas into the settling chamber gives an additional driving force to the downward flow of separated-out sludge and recirculation water. The sludge separation itself is improved.
Where the reactor is intended for anaerobic water purification, the supply line opening out tangentially into the settling chamber is a pipe for liquid and biogas. In that case it is connected to the fermentation chamber.
Where the reactor is intended for aerobic water purification, the supply line opening out tangentially into the settling chamber is an air or oxygen pipe.
The gas inlet line opening out into the settling chamber can be situated with its outlet end in a space which is separated by a cylindrical partition from the tangential inlet of the effluent discharge means.
An additional improvement of the downward flow in the downer can also be achieved if the means for introducing influent at least partially consist of one or more pipes opening tangentially downwards into the bottom part of the downer.
In order to prevent short-circuit currents in the bottom section of the reactor and to fluidise the bottom bed on the bottom, a number of gas inlet pipes can open out Just above the bottom of the fermentation chamber. In that case the whirlpool effect and the recirculation can also be adjusted to some extent with the influent introduction.
In the case of anaerobic purification, the settling in the settling chamber can be hampered by gas bubbles which occur in the case of oversaturation of (carbon dioxide) gas in the liquid/sludge mixture leaving the fermentation chamber. In order to solve this problem, the reactor can be provided with a gas stripper in the form of one or more cascade chambers, into which the liquid/sludge mixture to be supplied to the settling chamber is introduced, and out of which the liquid/sludge mixture flows through a tangential outlet into the settling chamber.
The cascade chambers are preferably fitted in the annular space between the cylindrical reactor wall and a cylindrical boundary wall of the settling chamber. A cyclone can be connected upstream of the cascade chambers, in order to separate out the coarse gas.
Of course, the place where effluent is discharged must lie at a good distance from the place where the liquid/sludge mixture is supplied tangentially to the settling chamber. The tangential outlet of the cascade chambers and the inlet of the effluent outlet will therefore lie at an angular distance of little less than 360.degree., viewed in the whirlpool direction.
BRIEF DESCRIPTION
REFERENCES:
patent: 3910838 (1975-10-01), Kaelin
patent: 4357242 (1982-11-01), Chandler
patent: 4609460 (1986-09-01), Vellinga
patent: 4707252 (1987-11-01), Durot et al.
patent: 4759854 (1988-07-01), Wilson
patent: 4818393 (1989-04-01), Durot et al.
patent: 4948518 (1990-08-01), Turgay
patent: 4950396 (1990-08-01), Scaar et al.
patent: 5344563 (1994-09-01), Noyes
patent: 5407584 (1995-04-01), Broussard, Sr.
patent: 5441634 (1995-08-01), Edwards
Green Theodore M.
Hruskoci Peter A.
Paques B.V.
LandOfFree
Reactor for the biological treatment of water does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reactor for the biological treatment of water, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reactor for the biological treatment of water will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1243158