Showing papers on "Spray tower published in 1993"

Simultaneous removal of NO and SO2 in packed scrubbers or spray towers

Abstract: Nitric oxide and sulfur dioxide can be removed from flue gas by scrubbing with a lime slurry containing ferrous EDTA. Tests in a 0.90m diameter column with several commercial packings gave 99 to 99.9 percent SO2 removal and 10 to 60 percent NO removal. The absorption of NO is controlled by the liquid-film resistance, and the number of transfer units varies with the square root of the ferrous EDTA concentration, the 0.4 to 0.6 power of the liquid rate, and the − 1.0 power of the gas velocity, in agreement with predictions. The height of a transfer unit for NO absorption, corrected for end effects, was 10 to 15m, about 30 times the estimated values for SO2 absorption, which is gas-film controlled. The spray tower gave lower removal rates for both gases, but the ratio of transfer units was about the same as for the packed columns.

Countercurrent extraction of nicotine from tobacco juice

Abstract: The countercurrent extraction of nicotine from aqueous solution and tobacco juice, using kerosene and hexane as solvents, was investigated A 57-mm-diameter column was operated in three modes: as a spray tower, packed with Raschig rings, and packed with Multifil high-efficiency packing Volume-based mass-transfer coefficients and HTU (height of a transfer unit) values were evaluated for various solvent/liquid ratios and various pH values The HTU values were found to vary between 101 and 07 m depending on the operating parameters selected

Device for treating waste combustion gas and treating method therefor

Abstract: PURPOSE:To provide a waste combustion gas-treating device enabling to enhance thermal efficiency without requiring a heating furnace even in the case a denitrification equipment to remove NOx, etc., is installed and a treating method therefor. CONSTITUTION:This device is a waste combustion gas-treating device for treating waste combustion gas discharged from an incinerator 1, etc., and it is constituted of a spray tower 4 for removing an acidic component in the waste combustion gas by spraying a neutralizer, a ceramic filter 5 for collecting incinerated ash and reactional products in the waste combustion gas passed through the spray tower 4, and a reaction tower 6 for spraying ammonia into the waste combustion gas passed through the ceramic filter 5 and denitrifying with a catalyst.

Boiler dust catcher with power saving function

Abstract: The utility model relates to a boiler dust catcher with power saving function, comprising a spray tower, a settling basin, a circulation pump, a smoke inlet, a smoke outlet, a sewage pipeline, etc. The smoke inlet and the sewage pipeline are respectively connected with the spray tower, and the other end of the sewage pipeline is connected with the settling basin. After the dusty smoke passes through a purifying cavity which is arranged in the spray tower, harmful gas and powder dust is removed. The blackness of the smoke which is decontaminated by the device is the first level of Ringelmann number, and the concentration of the dust exhausting is 180 mg of one standard cubic meter. The dusty waste water is precipitated in the settling basin, and the fly ash collected in the settling basin can be recycled periodically. The utility model has the effect of saving energy, which is suitable for removing dust in one or more boilers which use various fuel. The utility model has the advantages of compact structure, reliable performance, convenient operation, less disposable investment and quick effect.

Spray tower type wet flue gas desulfurization apparatus

Abstract: PURPOSE:To provide a flue gas desulfurization apparatus which has high power with no need of increasing the tower height even in the case where high desulfurization efficiency is required and is provided with a simple and spray tower-type absorption tower. CONSTITUTION:A contact region of a gas and a sprayed absorbing liquid in the absorbing tower is divided into a counter-current contacting region (a gas inlet side region) 31 and a co-current contacting region (a gas outlet side region) 32 and the gas passing cross section area of the gas inlet side region is made larger than the gas passing cross section area of the gas outlet side region, so that the gas flow rate at the gas inlet side region 31 is higher and the collision speed of the gas and the sprayed drops of the absorbing liquid becomes high and thus SO2 absorption is acceralated. Also, since a supply line 21 of a make-up absorbing liquid is installed in the circulation tank 3 near an absorbing liquid circulating flow route of the gas outlet side region 32, the drops of the sprayed absorbing liquid contain a large amount of a fresh absorbing agent and thus the absorption of SO2 is acceralated even if SO2 concentration is low. In this way, the height of the absorption tower can be lowered.

Verfahren zur Herstellung von Alkylsulfat-Pulvern mit hohem Schüttgewicht

Abstract: The invention relates to a process for the preparation of alkyl sulfate powders with a bulk density of at least 300 g / l by spray drying an aqueous solution of alkyl sulfate with a solids content of 10 to 60 wt .-% in a spray tower, in the head part of which the liquid is applied by pressure from 10 to 10 Pa sprayed through single-substance nozzles and the resulting spray mist is dried in cocurrent with hot inert gas.

Animal feed supplement prodn.

Abstract: The supplement is based on animal fat, which is treated in molten state in a spray tower with a combination of elevated temp., vacuum and dispersion. The resulting spray granules are immediately passed to an oven maintained at 35 deg.C and sprayed with a vitamin complex, which remains fixed to the surface when the granules are cooled.