Spray lance arrangement

Abstract

A two media spray lance and nozzle useful for moistening at least a portion of absorbent material present in a mixer. The nozzle includes a central body with a connecting portion for connecting the nozzle to the two media spray lance for a supply of liquid and gas thereto, and an atomizing portion. The atomizing portion delivers droplets of liquid to the absorbent material present in the mixer to obtain moistened absorbent material.

1 . A method of moistening absorbent material for use in removing gaseous pollutants from a process gas, the method comprising:
 using a mixer having at least one two media spray lance and nozzle combination for spraying liquid onto absorbent material present inside of the mixer, with the two media spray lance and nozzle combination comprising a nozzle with a central body comprising a connecting portion for fluidly connecting the nozzle to a liquid supply pipe for a supply of liquid thereto from a liquid supply, with the liquid supply pipe comprising a portal with an air supply pipe arranged therethrough with a first opening arranged external to the liquid supply pipe and fluidly connected to a supply of air from an air supply, and a plurality of second openings arranged internal within the liquid supply pipe for air flow from the supply of air through the air supply pipe and into the flow of liquid to disperse the liquid and form air dispersed liquid prior to the air dispersed liquid entering the nozzle, and   atomizing the liquid droplets with the nozzle to moisten at least a portion of the absorbent material present inside the mixer.   
     
     
         2 . A method according to  claim 1 , wherein the nozzle further comprises a cleaning chamber defined by the atomizing portion. 
     
     
         3 . A method according to  claim 1 , wherein the nozzle further comprises a deflecting plate with a deflection surface having a surface roughness, R a , of 0.01 to 2.0 micrometer. 
     
     
         4 . A method according to  claim 3 , wherein an angle α between the deflection surface and a center line of the liquid supply pipe is in the range of 15-25°. 
     
     
         5 . A method according to  claim 3 , wherein the deflecting plate has lateral edges extending from the deflection surface at an angle γ of 10-40° to a normal line of the deflection surface.