Showing papers on "Spray tower published in 1997"
TL;DR: In this paper, a model based on penetration theory has been developed to calculate the dynamic absorption rate of sulfur dioxide into a droplet of limestone slurry, which includes both instantaneous equilibrium reactions and reactions with finite rates; limestone dissolution, sulfite oxidation, gypsum crystallization and the hydrolysis reaction of CO2.
153 citations
TL;DR: In this article, measurements of local fluxes of the sprayed liquid, local number fluxes, and local drop size distributions were made for wide ranges of liquid and gas flow rates.
Abstract: In order to investigate spray properties, measurements of local fluxes of the sprayed liquid, local number fluxes of drops and local drop size distributions were made for wide ranges of liquid and gas flow rates. An empirical correlation for the volume mean diameter of sprayed drops at the nozzle exit was obtained. Experimental studies of gas absorption with a spray column were carried out for carbon dioxide-air-water and carbon dioxide-air-aqueous sodium hydroxide solution systems over wide ranges of liquid flow rates, feed gas concentrations and initial alkaline concentrations. The observed data for dimensionless rates of absorption of carbon dioxide were compared with the values predicted by a solid sphere penetration model.
25 citations
TL;DR: In this article, the balance of forces acting on droplets falling down inside a co- or counter-current spray tower was analyzed analytically for slurry droplet motion in the range of 400
Abstract: On the basis of the balance of forces acting on droplets falling down inside a co- or counter-current spray tower, a model of scrubber aerodynamic characteristics was developed. Relations between pressure drop caused by spray, droplet concentration and residence time distribution of the dispersed phase were found analytically for slurry droplet motion in the range of 400
21 citations
Patent•
27 Feb 1997
TL;DR: In this paper, a spray tower is equipped with a tank that serves as a reservoir for an alkaline slurry used to remove acidic gases and particulate matter from the flue gases.
Abstract: A method for scrubbing flue gases utilizing a spray tower for removing acidic gases and particulate matter from flue gases produced by processing operations of the type carried out in utility and industrial facilities. The spray tower is equipped with a tank that serves as a reservoir for an alkaline slurry used to remove acidic gases and particulate matter from the flue gases. The slurry is pumped from the tank to spraying devices located within the tower. The spray tower further includes an internal structure that enables the slurry to be oxidized and gently agitated within a limited region of the tank, and without the requirement for two separate aeration and agitation devices. As a result, the construction, operational and maintenance costs of the spray tower are significantly reduced as compared to prior art spray towers.
13 citations
TL;DR: In this paper, a computer model characterizing the performance of a spray tower oxygen absorption system was developed based on finite difference mass transfer calculations, which was assessed in terms of oxygen utilization, transfer efficiency, and economy.
8 citations
Patent•
24 Sep 1997
TL;DR: In this paper, a magnetized water back spray dust remover for a cement vertical kiln is proposed, where a spray head device is arranged at the upper part of the tower, and a magnetizer is arranged on a spray pipe which is connected with the spray head and a clear water pool.
Abstract: The utility model relates to a magnetized water back spray dust remover for a cement vertical kiln. The smoke gas outlet of a vertical kiln is communicated with a spray tower. After entering the spray tower, the smoke gas with dust is sprayed in a reverse direction to remove dust through a spray head which is arranged at the upper part of the tower, and is discharged from a discharge outlet. Powder dust is collected and enters an ash and water separator following sewage to be processed. The spray head device is arranged at the upper part of the tower, and a magnetizer is arranged on a spray pipe which is connected with the spray head and a clear water pool. Thus, the activity of spray water is reinforced, the capacity for capturing small fine dust through liquid drop is enhanced, and the dust removing efficiency is increased. The structure of the utility model is simple, and the dust removing efficiency reaches more than 98 %.
2 citations
Patent•
06 May 1997
TL;DR: In this paper, a spray tower (saturating unit) feeds the water supplied by a spray nozzle 64 downward, and conditions the air flowing upward in the tower 10 to predetermined temperature and humidity.
Abstract: PROBLEM TO BE SOLVED: To limit the flow rate of the air for conditioning the temperature and humidity to the minimum limit by bringing the air flowing upward in a saturating unit into contact with the water flowing downward in the unit, and conditioning the air to predetermined degrees of temperature and humidity. SOLUTION: A spray tower (saturating unit) 10 feeds the water supplied by a spray nozzle 64 downward, and conditions the air flowing upward in the tower 10 to predetermined temperature and humidity. The water flow is circulated in the tower 10 by a pump 18. Thus, the air flow is brought into contact with water for a suitable time in the tower 10, sufficiently moistened (i.e., relative humidity of 100%) to be saturated, and the wet bulb temperature of the air flow output from the tower 10 is substantially equal to the temperature of the water introduced to the power 10. The exhaust air flow is brought into contact with a heat exchanger 68, which gives a predetermined quantity of heat to the air blow to desired dry and wet temperatures. Since the heat added to the exhaust air flow is constant, the treating control becomes minimum limit as log as the air flow is retained constantly.
1 citations