Showing papers on "Spray tower published in 1986"

Recovery of light oil in coke oven gas

Abstract: PURPOSE:To enhance the efficienty of recovering a light oil fraction in coke oven gas by using a multistage spray tower, by filling each stage of the multistage spray tower with a filler to a specified level. CONSTITUTION:Each stage of a multistage spray tower is filled with a filler such as polypropylene moldings to a level 0.1-0.21 time as high as the stage interval. Coke oven gas is introduced from the bottom of the multistage spray tower andbrought into countercurrent gas/liquid contact with an absorbent liquid such as an arom. one sprayed from the top of the tower, to absorb and recover a light oil fraction such as benzene, toluene or xylene in the coke oven gas in the absorbent liquid. Thus it is possible to recover the light oil fraction in the coke oven gas in a high efficiency, which causing little pressure loss and little possibility of blocking due to tar, naphthalene, etc.

Apparatus for treating dry cell containing mercury

Abstract: PURPOSE:To recover and reutilize mercury by crushing and heating a spent mercury-contg dry cell, cooling the obtained mercury vapor, sending the dry- distilled gas to a spray tower to remove a trace of mercury and then removing the remaining trace amt of mercury with the final treating device CONSTITUTION:A mercury-contg dry cell is crushed by a crusher 1, the crushed material is heated in an external-heating dry distillation furnace 2 at a temp above the bp of mercury, the gaseous distillate discharged from the furnace 2 is cooled by a condenser 3 to condense the mercury vapor and the condensed mercury is recovered a mercury recovery vessel 4 The trace amt of mercury in the waste gas from the vessel 4 and suspended dust are removed in a spray tower 6, small amts of impurities and moisture are separated from the waste gas from the tower 6 by a cushion tank 81 in the final treating part 8, then the minor amt of remaining mercury which has not been removed in the tower 6 and hydrocarbons in the waste gas are adsorbed and removed by the activated carbon and silica gel in a packed tower 84 and the waste gas after passing through the tower 84 is discharged to the atmosphere from a waste gas stack 85

Method of burner combustion with low nox

Abstract: PURPOSE:To save the consumed fuel and make it possible to carry out low NOx combustion for a burner by dividing the combustion air heated by the exhaust gas into two parts and leading one part to at least one of combustion air inlets that are provided at three points in a burner and leading the other part as steam-containing air to the combustion air inlets. CONSTITUTION:The piping on the discharge side of a blower 4 is branched, one being connected directly to a burner A and the other to the burner A through a spray tower 5. In the burner A a primary air inlet 7, a secondary air inlet 8 and tertiary combustion air inlet 9 are formed, and one of the branched pipings is further branched via a damper, and again the branched pipings are connected to the primary combustion air inlet 7 and the air inlet 8 of the secondary combustion air inlet 8 of the burner A via dampers. The other piping is connected to the spray tower 5. The heated combustion air becomes steam-containing air by passing through the spray tower 5, and it is connected to a tertiary combustion air inlet 9 of the burner A. The combustion temperature is lowered by the evaporation heat of the steam and NOx development is suppressed.