Method of treating oily smoke, fumes, vapor or ordors

Abstract

The invention relates to a method for treating oily smoke, fumes, vapor or odors produced when cooking. According to this method, the oily smoke, fumes, vapor or odors coming from cookers placed over an oven will be drawn and mixed with a part of air to form gaseous mixture under the action of drawing fan. Then, the formed gaseous mixture will be forced to enter at least one preheating region. In the said preheating region, the said gaseous mixture is preheated. After preheated, the said gaseous mixture is forced to enter at least one heating source region of the said oven. A part of thermal energy provided by the heating source located in the center of the said heating source region is used for preheating the said gaseous mixture filling in the said preheating region. In the heating source region the temperature of the preheated gaseous mixture will raise to a high enough level so that the pollutants contained in the said gaseous mixture can be decomposed and/or fully reacted with the oxygen in the gaseous mixture. A part of thermal energy provided by the said heating source is used for initiating and/or accelerating the decomposition and/or oxygenation of the pollutants. Then, the products of the said decomposition and/or oxygenation reactions and the un-reacted matter contained in the said gaseous mixture are discharged from the said heating source region by passing through at least one filter. In the present invention, the said heating source can be a gas, fuel oil, electric or coal range. When the heating source is gas, fuel oil or coal range, the oxygen contained in the said gaseous mixture can accelerate and improve the combustion of gas, fuel oil or coal. On the other hand, the oxygenation of pollutants contained in oily smoke, fumes, vapor and odors can also have some contribution to maintain the high temperature of the said heating source region because their oxygenation reactions are all exothermal reactions.

What I claimed as my invention is:  
     
         1 . A method for treating and removing oily smoke, fumes, vapor, or odors. According to this method, the oily smoke, fumes, vapor or odors produced from at least one cooker placed over an oven are drawn by at least one drawing fan and mixed with a part of air to become at least one gaseous mixture under the action of the said drawing fan. Then, the said gaseous mixture of air and oily smoke, fumes, vapor or odors is forced to pass through at least one passage and then enter at least one preheating region. In the said preheating region, the said gaseous mixture is preheated. After preheated, the said gaseous mixture is forced to enter at least one heating source region of the said oven. A part of thermal energy provided by the heating source located in the said heating source region is used for preheating the said gaseous mixture filling in the said preheating region. A part of thermal energy provided by the said heating source is used for initiating and/or accelerating the decomposition and/or oxygenation of the pollutants contained in the said gaseous mixture filling in the said heating source region. Then, the products of the said decomposition and/or oxygenation reactions and the un-reacted matter contained in the said gaseous mixture are discharged from the said heating source region by passing through at least one filter.  
     
     
         2 . A method for treating and removing oily smoke, fumes, vapor, or odors as claimed in  claim 1 , wherein the said heating source is a gas range and the said heating source region is a gas combustion region.  
     
     
         3 . A method for treating and removing oily smoke, fumes, vapor, or odors as claimed in  claim 1 , wherein the said heating source is a fuel oil range and the said heating source region is a fuel oil combustion region.  
     
     
         4 . A method for treating and removing oily smoke, fumes, vapor, or odors as claimed in  claim 1 , wherein the said heating source is a coal range and the said heating source region is a coal combustion region.  
     
     
         5 . A method for treating and removing oily smoke, fumes, vapor, or odors as claimed in  claim 1 , wherein the said heating source is an electric range and the said heating source region is an electrically heating region.  
     
     
         6 . A method for treating and removing oily smoke, fumes, vapor, or odors as claimed in  claim 1 , wherein the said passage is a pipe, through which the said gaseous mixture of air and oily smoke, fumes, vapor or odors drawn by the said drawing fan can enter at least one said preheating region.  
     
     
         7 . A method for treating and removing oily smoke, fumes, vapor, or odors as claimed in  claim 1 , wherein the said heating source is surrounded with the said preheating region. The said heating source region is formed between the said heating source and the said preheating region.  
     
     
         8 . A method for treating and removing oily smoke, fumes, vapor, or odors as claimed in  claim 7 , wherein the said heating source region and said preheating region are connected through a series of holes.