Gas and liquid contact apparatus – Multiple gas – Furnace-gas type
Patent
1986-11-13
1988-11-15
Miles, Tim
Gas and liquid contact apparatus
Multiple gas
Furnace-gas type
261109, 261 792, 261DIG46, 261DIG11, 55242, 552571, 01F 304, B01F 304
Patent
active
047848103
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATION
This application is a national phase application corresponding to PCT/EP86/00111 filed Mar. 4, 1986 and based, in turn, upon West German National application Nos. P35 09 542.3 and P35 09 543.1 filed Mar. 16, 1985.
FIELD OF THE INVENTION
The present invention relates to a cooling tower for the cooling water that drains from the condensor of a steam generator or from the condensors of a plurality of steam generators; the tower is fitted with large-area inserts and these form a heat-exchange area into which the cooling water is passed; a rising flow of air passes through this zone in counterflow to the cooling water, the cooling tower being provided with a smoke-gas feed to introduce cleaned, preferably wet-cleaned, smoke gas into the flow of cooling air, which is connected to a plurality of gas outlet pipes, the outlet cross-sections of which open out into the cooling tower above the heat-exchange zone.
BACKGROUND OF THE INVENTION
As a rule, it is only possible to maintain the limiting values for concentrations of toxic substances in smoke gas that is released into the atmosphere, which are laid down in the regulations governing the operation of major furnace systems by treating all of the smoke gas that results from combustion in a wet-washing system, with the addition of suitable absorbents. The purified smoke gas leaves the smoke gas sulfur removal plant at a temperature that is between 40.degree. and 60.degree. C. and for this reason must be reheated to approximately 80.degree. to 120.degree. C. before being able to rise when introduced into a chimney. It is obvious that a great deal of energy is needed in order to do this. As an example, in a 70 MW power station operating under full load in excess of 2.5 million cubic meters of smoke gas has to be reheated every hour.
In order to avoid having to reheat the smoke gas that is produced in power stations, it has already been proposed that the purified smoke gases be introduced into the flow of cooling air above the heat exchange zone and the cooling air that is flowing upwards be used as a means of transporting the purified smoke gases so as to introduce them into the atmosphere. By so doing, it is possible to avoid the costs involved in reheating the smoke gases. Furthermore, it becomes possible to dispense with the construction of a chimney in power stations that are to be built. A further advantage of this procedure is the additional dilution of the smoke gases and thus the concentration of residual toxic materials that is obtained thereby. However, a prerequisite for this is a thorough and even mixing of the smoke gases that are introduced with the rising cooling air.
In a known plant of this type the introduction of the smoke gases into the flow of cooling air in the cooling tower takes place through chimney-like gas outlet pipes arranged above the heat-exchange zone in the vicinity of the center of the cooling tower; these gas outlet pipes are connected to a central smoke gas feed. The ends of the gas outlet pipes are angled so that the flow of smoke gas has a radial flow component that is directed into the cooling tower cross-section. This is indispensable for thorough mixing with the cooling air. In order to improve the smoke-gas distribution in the flow of cooling air, immediately behind the outlet cross-section of the gas outlet pipes there are insert plates; these essentially extend these pipes on the flow surface, broaden out towards their ends, and are wound spirally, being intended to swirl the flow of smoke gas that is introduced and thereby contribute to an intensive mixing with the cooling air that is moving upwards. These insert plates, which are at their end areas almost normal to the direction of flow of the cooling air, have an undesirable effect on the cooling-air flow itself. At least a part of the cooling air that flows upwards is deflected and additionally swirled. The loss of energy for the cooling-air flow that is connected with this leads, ultimately, to a reduced exit velocity and, a
REFERENCES:
patent: 2970671 (1961-02-01), Warner
patent: 3488960 (1970-01-01), Kirkpatrick
patent: 3550356 (1970-12-01), Abboud
patent: 3581467 (1971-06-01), Donnelly
patent: 3841208 (1974-10-01), Knox
patent: 3914378 (1975-10-01), Selmeczi
patent: 3944636 (1976-03-01), Schuldenberg et al.
patent: 4031173 (1977-06-01), Rogers
patent: 4095964 (1978-06-01), Carnicle
patent: 4157368 (1979-06-01), Fernandes
patent: 4273146 (1981-06-01), Johnson
patent: 4371563 (1983-02-01), Muehlberger
patent: 4397793 (1983-08-01), Stillman et al.
The Condensed Chemical Dictionary, Hawley, Tenth Ed., Van Nostrand Reinhold Co.
Dewert Heribert
Gresch Heinrich
Holter Heinz
Igelbuscher Heinrich
Jorzyk Sigurd
Dubno Herbert
Lianides Ronald
Miles Tim
Saarbergwerke Aktiengesellschaft
LandOfFree
Smoke gas exhaust by way of a cooling tower does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Smoke gas exhaust by way of a cooling tower, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Smoke gas exhaust by way of a cooling tower will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1102570