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Showing papers on "Spray tower published in 1995"


Patent
07 Jul 1995
TL;DR: In this paper, a method for processing waste liquids, having high solids content, is described, which includes the steps of spraying and evaporating the waste liquid together with a dry gas in a counterflow of dry gas within a spray tower, collecting the solids of the waste water in a lower section of the spray tower.
Abstract: A method for processing waste liquids, having high solids content. The process includes the steps of spraying and evaporating the waste liquid together with a dry gas in a counterflow of dry gas within a spray tower, collecting the solids of the waste water in a lower section of the spray tower, discharging the moist gas from an upper section of the spray tower, and bringing the moist gas in heat exchange with an evaporator of a refrigerating means to condensed the liquid from the evaporator. The cooled dry gas is directed in heat exchange with the condenser of said refrigerating means and heated to be returned in a closed loop to repeat the cycle of operation.

25 citations


Journal ArticleDOI
TL;DR: In this paper, a general approach for spray tower design is presented, which includes the presence of a continuous gas phase, the nature of the spray nozzle, the dispersion of the droplets as well as the apparition of a film along the column wall.

16 citations


Patent
30 Oct 1995
TL;DR: In this article, an apparatus to mix a slurry mixture with an oxidization air within a reaction tank of a wet scrubber spray tower of a flue gas desulfurization system for a furnace is described.
Abstract: An apparatus to mix a slurry mixture with an oxidization air within a reaction tank of a wet scrubber spray tower of a flue gas desulfurization system for a furnace. The apparatus improves the contact between forced oxidization air and slurry mixture within the reaction tank.

13 citations


Journal ArticleDOI
TL;DR: In this paper, the authors used a spray column with poly(ethylene glycol) and a modified starch-Reppal PES 100 to transfer protein from the dispersed phase to the continuous phase, and the effect of dispersed phase superficial velocity, system composition, continuous phase height and distribution system design on either overall protein mass transfer coefficient or column hold-up is described.
Abstract: The characterization of Bovine Serum Albumin mass transfer mechanisms in a spray column using an aqueous two-phase system composed of poly(ethylene glycol) and a modified starch-Reppal PES 100-is done. The poly(ethylene glycol) rich phase is used as the dispersed phase and protein transfer takes place from the dispersed phase to the continuous phase. The effect of dispersed phase superficial velocity, system composition, continuous phase height and distribution system design on either overall protein mass transfer coefficient or column hold-up is described. It is shown that continuous phase superficial velocity and phase composition are the main controlling factors for protein transfer. It is also observed that, with the tested system, only at very low dispersed phase superficial velocities is it possible to operate the spray column as an extraction column. In this system the upper operating limit of the dispersed phase velocity is ten times smaller than in other aqueous two-phase systems.

13 citations


Patent
18 Apr 1995
TL;DR: In this article, an integrated spray header tray assembly for a wet flue gas desulfurization spray tower is presented, where a series of spray headers having opposed nozzles are located along a perforated plate acting as one set of baffles.
Abstract: An integrated spray header tray assembly (18) for a wet flue gas desulfurization spray tower (10) wherein a series of spray headers (22) having opposed nozzles (26) for desulfurizing spray are located along a perforated plate (24) acting as one set of baffles (30) while a second set of baffles (32) positioned perpendicularly thereto forms a baffled tray with the perforated plate (24) and headers (22) while allowing the introduction of desulfurizing spray from the header nozzles (22) parallel to the perforated tray (24).

9 citations


Patent
07 Mar 1995
TL;DR: In this paper, a spray tower with a part 2 expanding successively from the top of the tower having a gas inlet 1 and an expanding part for spraying water and/or a liq. absorbent to cool and humidify the gas and remove a harmful component or a spray nozzle fixed directly behind the expanding part and never generates waste water.
Abstract: PURPOSE:To provide a spray tower for cooling, humidifying and cleaning a gas without generating waste water due to the collision of the sprayed droplet with the inner wall of the tower and without dust being stuck to the inner wall. CONSTITUTION:This dry spray tower has a part 2 expanding successively from the top of the tower having a gas inlet 1 and an expanding part for spraying water and/or a liq. absorbent to cool and humidify the gas and/or to remove a harmful component or a spray nozzle fixed directly behind the expanding part and never generates waste water. A gas flow straightening device 6 is provided to the expanding part 2 on the upstream side of the nozzle 4 to make the flow velocity of the downward component higher at the peripheral part than at the central part. Accordingly, a perforated plate with the rate of perforation made larger at the peripheral part than at the central part, a perforated plate with the peripheral part slit, etc., are preferably used as the device 6.

4 citations


Patent
18 Apr 1995
TL;DR: In this paper, a plurality of net bodies 6a-6d of sufficient size to cover the cross-sectional surface of the area are arranged at intervals in the direction in which the gaseous mixture is advanced and are fixed.
Abstract: PURPOSE:To provide a gas-liquid contacting device in gas absorption which has the advantage of a spray tower of simple construction, low cost and little pressure drop and also where liquid to be sprayed is uniformly dispersed even when it is in a state of slurry of low concentration and recovery efficiency and removal efficiency are improved. CONSTITUTION:In a gas-liquid contacting area where a liquid for absorbing gas jetted from jetting nozzles 2a, 2b, 3a, 3b and a gaseous mixture come into contact with each other, a plurality of net bodies 6a-6d of sufficient size to cover the cross-sectional surface of the area are arranged at intervals in the direction in which the gaseous mixture is advanced and are fixed. The plural net bodies 6a-6d are fixed by pulling the opposite end parts so that the opening of the mesh may be expanded. The jetting nozzles may be arranged opposite to each other so that the net bodies 6a-6d may be put between the upstream side and the downstream side of the flow of the gaseous mixture in the gas- liquid contacting area.

4 citations


Patent
19 Jul 1995
TL;DR: In this paper, the authors proposed a double-function purifier for smoke gas, which is suitable for purifying smoke dust and SO2 in smoke gas of boilers and industrial furnaces.
Abstract: The utility model relates to a desulfurizing and dust removing double-function purifier for smoke gas, which is suitable for purifying smoke dust and SO2 in smoke gas of boilers and industrial furnaces. The utility model is composed of a main barrel of which the upper part is provided with an absorbing tower plate, auxiliary cylinders or venturi pipes, etc., wherein, A section of circular cylinder is arranged under the lowest absorbing tower plate in the main cylinder, and a cyclone water film dust remover or a spray tower composed of the circular cylinder forms a secondary purifying device with the absorbing tower plates or forms a three-stage purifying device with the absorbing tower plates and the venturi pipes. The utility model has the advantages of high desulfurizing a dust removing efficiency, no scale formation, no waste water discharge and recovery of all slag water. Cheap lime cream can be used for circulating desulfurization, so that desulfurizing agents have a high utilization rate, and the utility model is made of granite or other material, so that the investment is low.

2 citations


Journal Article
TL;DR: In this paper, the most important parameters in determining particle collection efficiency are inlet dust particle size, followed by (in decreasing order of importance) gas velocity, collector droplet size, liquid-to-gas ratio, and length of scrubber.
Abstract: Spray tower wet scrubbers are used for control of particulates (as well as gaseous pollutants). The author has found that in cocurrent spray scrubbers, the most important parameter in determining particle collection efficiency is inlet dust particle size, followed by (in decreasing order of importance) gas velocity, collector droplet size, liquid-to-gas ratio, and length of scrubber. In countercurrent scrubbers, the most important parameters are collector droplet size, liquid-to-gas ratio, length of scrubber, and gas velocity. Note that some of these factors are directly related to collection, and some are related indirectly. This article provides equations, based on theoretical considerations and empirical data, for predicting particle collection efficiencies. The parameter ranges covered are typical of those encountered in the practical operation of conventional spray towers that use a ``cool`` (or cooled) inlet gas stream, so the equations are applicable to many industrial spray tower systems. The results are limited based on the ranges of the parameters evaluated, and while it may be possible to extrapolate beyond that, this has not been verified. (The initial model was for a flue-gas desulfurization system at a large power station that requires both particulate removal and SO{sub 2} absorption.)

2 citations