Liquid fuel industrial burner

Abstract

A liquid fuel burner comprising a burner tip outputs a thin ring of oil that may be more easily atomized by the flow of atomizing oxidant at lower pressures. The liquid fuel burner comprises a fuel conduit and an atomizing oxidant conduit coaxial about the fuel conduit. The fuel conduit and atomizing oxidant conduit output fuel and oxidant into a furnace through the burner tip. The burner tip includes a central dispersion head in the output end of the fuel conduit which operates to fan the liquid fuel oil outward into a thin fan shaped ring that then is atomized by the surrounding flow of high velocity oxidant.

What is claimed is:  
     
         1 . A liquid fuel industrial burner for burning liquid fuel and oxidant, comprising: 
 a liquid fuel conduit having a liquid fuel inlet for receiving pressurized liquid fuel and a first discharge end for discharging liquid fuel;    an atomizing media conduit surrounding the liquid fuel conduit having an atomizing media inlet for receiving pressurized atomizing media and a second discharge end for discharging atomizing media; and    a burner tip at the discharge ends of the of the liquid fuel conduit and the atomizing media conduit, the burner tip including a dispersion head arranged in the first discharge end forming an annular discharge orifice between the first discharge end and the dispersion head.    
     
     
         2 . The liquid fuel industrial burner of  claim 1  wherein the dispersion head has a conical deflecting surface at the annular discharge orifice, the conical deflecting surface adapted to impart radial components to discharged liquid fuel and direct discharged liquid fuel into the path of discharged atomized media for atomization of the liquid fuel.  
     
     
         3 . The liquid fuel industrial burner of  claim 1 , further comprising a combustion oxidant conduit for receiving pressurized oxidant adapted to discharge oxidant downstream of the first and second discharge ends for completing stochiometric combustion of atomized liquid fuel.  
     
     
         4 . The liquid fuel industrial burner of  claim 1  wherein the first and second discharge ends lie in substantially the same plane such that during operation rapid expansion of atomizing media discharged through the second discharge end atomizes liquid fuel via the venturi effect.  
     
     
         5 . A liquid fuel industrial burner for burning liquid fuel and oxidant, comprising: 
 an inner pipe for transmitting liquid fuel toward an atomization region;    an outer pipe coaxial about the inner pipe for transmitting atomizing media toward the atomization region;    a burner tip comprising a liquid fuel nozzle and an atomizing nozzle;    the liquid fuel nozzle mounted on an end of the inner pipe including (a) a nozzle sleeve and (b) a nozzle stem, the nozzle sleeve having a central through hole extending toward an annular first discharge end proximate the atomization region, the nozzle stem mounted into the through hole and having an enlarged dispersion head forming an annular discharge orifice between the dispersion head and the annular first discharge end, the dispersion head arranged and configured to form a thin ring of liquid fuel that includes radial and axial components;    the atomizing nozzle mounted on an end of the outer pipe coaxial about the liquid fuel nozzle adapted to output a atomizing flow of atomizing media through a second discharge end for atomizing said thin ring of liquid fuel.    
     
     
         6 . the liquid fuel industrial burner of  claim 5  wherein the dispersion head is frusto-conical having a conical surface substantially parallel to a conical surface of the annular discharge end.  
     
     
         7 . The liquid fuel industrial burner of  claim 6  wherein the nozzle stem is mounted into the nozzle sleeve, the stem including an internal passage fluidically connecting the interior of the inner pipe to an internal annular chamber formed between nozzle stem and the nozzle sleeve proximate the dispersion head.  
     
     
         8 . The liquid fuel industrial burner of  claim 6  wherein the respective discharge ends of the atomizing nozzle and the liquid fuel nozzle lie in substantially the same plane such that during operation rapid expansion of atomizing media discharged through the second discharge end atomizes liquid fuel via the venturi effect.  
     
     
         9 . The liquid fuel industrial burner of  claim 6  wherein the burner tip includes a plurality of radially projecting ribs between the inner surface of the atomizing nozzle and the outer surface of the liquid fuel nozzle centering the inner pipe inside of the outer pipe, flow channels being formed between adjacent ribs for communicating atomizing media therethrough.  
     
     
         10 . The liquid fuel industrial burner of  claim 9  wherein the inner pipe is movable along an axis relative to the outer pipe to adjust the relative positions of the atomizing nozzle and liquid fuel nozzle and thereby the characteristic of the burner tip, further comprising a control mechanism adapted for adjusting the position of the inner pipe.  
     
     
         11 . The liquid fuel industrial burner of  claim 6  wherein the second discharge end converges radially inward toward the atomization region, and wherein the head includes a diversion surface along the discharge orifice that diverges radially outward as in extends toward the atomization region.  
     
     
         12 . The liquid fuel industrial burner of  claim 6  wherein the nozzle sleeve is connected to the inner pipe via threads, further comprising a ring gasket arranged between the inner pipe and the nozzle sleeve for preventing liquid fuel leakage therebetween.  
     
     
         13 . The liquid fuel industrial burner of  claim 6  wherein the liquid fuel industrial burner is an oxy-oil industrial burner.  
     
     
         14 . The liquid fuel industrial burner of  claim 6  wherein the liquid fuel industrial burner is an oil only industrial burner.  
     
     
         15 . The liquid fuel industrial burner of  claim 6  wherein the liquid fuel industrial burner is a preheated air-oil burner wherein the air is preheaded.  
     
     
         16 . The liquid fuel industrial burner of  claim 6 , further comprising a combustion oxidant conduit coaxial about the inner and outer pipes for receiving pressurized oxidant adapted to direct oxidant toward the first and second discharge ends for completing combustion of atomized liquid fuel.  
     
     
         17 . An oxy-liquid fuel industrial burner system for burning liquid fuel and oxygen, comprising: 
 a liquid fuel supply;    a liquid fuel flow control train connected to the liquid fuel supply adapted to control a pressurized flow of liquid fuel    an oxygen plant producing a pressurized source of oxygen;    a combustion oxygen flow control train connected to the oxygen plant adapted to control a pressurized flow of oxygen;    an atomizing oxygen flow control train connected to the oxygen plant in parallel with the combustion oxygen flow control train adapted to control a pressured flow of atomizing oxygen; and    a liquid fuel industrial burner comprising: 
 (a) a liquid fuel conduit having a liquid fuel inlet connected to the liquid fuel flow control train for receiving pressurized liquid fuel and a first discharge end for discharging liquid fuel;  
 (b) an atomizing oxidant conduit surrounding the liquid fuel conduit having an atomizing oxidant inlet connected to the atomizing oxygen flow control train for receiving pressurized oxidant and a second discharge end for discharging atomizing oxidant;  
 (c) a burner tip at the discharge ends of the of the liquid fuel conduit and the atomizing oxidant conduit, the burner tip including a dispersion head arranged in the first discharge end forming an annular discharge orifice between the first discharge end and the dispersion head; and  
 (d) a combustion oxidant conduit connected to the combustion oxygen flow control train for receiving pressurized oxidant adapted to discharge oxidant downstream of the first and second discharge ends at a selected location for completing stochiometric combustion of atomized liquid fuel.  
   
     
     
         18 . The oxy-liquid fuel industrial burner of  claim 17  wherein the oxygen plant produces oxygen at a pressure of between about  10  and about 15 psi, wherein no booster compressor is used in the atomizing oxidant flow.  
     
     
         19 . A liquid fuel industrial burner, comprising: 
 a liquid fuel conduit connected to a supply of liquid fuel;    an atomizing media conduit coaxial about the liquid fuel conduit connected to a source of pressurized atomizing media;    a burner tip at ends of the liquid fuel conduit and atomizing oxidant conduit comprising a fuel nozzle for the liquid fuel conduit and an atomizing nozzle for the atomizing media conduit coaxial about the fuel nozzle forming a venturi about the fuel nozzle, the fuel nozzle having an outlet orifice with an enlarged dispersion head therein imparting axial and radial components to liquid fuel exiting the outlet orifice and intersecting atomizing media flowing through the venturi.    
     
     
         20 . The liquid fuel industrial burner of  claim 19  wherein the fuel nozzle is a multiple piece assembly comprising a nozzle stem mounted into a nozzle sleeve, the stem providing the enlarged dispersion head.  
     
     
         21 . The liquid fuel industrial burner of  claim 19 , further comprising a combustion oxidant conduit coaxial about the liquid fuel and atomizing conduits connected to a source of pressurized oxidant, the combustion oxidant conduit adapted to direct oxidant toward the first and second discharge ends for completing combustion of atomized liquid fuel.  
     
     
         22 . The liquid fuel industrial burner of  claim 19  wherein the enlarged dispersion head is frusto-conical.