Burner for regeneration of diesel engine particulate filter and diesel engine particulate filter having the same

Abstract

Provided are a burner for regenerating a diesel particulate filter and a diesel engine particulate filtering apparatus having the same. The burner includes: an exhaust gas flow channel; a swirler disposed between the exhaust gas flow channel and a combustion chamber for swirling the exhaust gas; a carburetor for gasifying a liquid fuel; a fuel injection nozzle for mixing the gasified fuel from the carburetor with an air for burning, and supplying the mixed gas made of the gasified fuel and the air to the combustion chamber; a combustor disposed in the combustion chamber for injecting the mixed gas supplied from the fuel injection nozzle; an igniter for igniting the mixed gas injected from the combustor by generating sparks; and a flame sensor for sensing whether the flame is made on the combustor or not.

1 . A burner for regenerating a diesel particulate filter, comprising: an exhaust gas flow channel of a diesel engine, which is disposed at the front of a combustion chamber on the same axis of the combustion chamber; at least one of swirlers disposed between the exhaust gas flow channel and the combustion chamber for swirling the exhaust gas flowing into to the combustion chamber through the exhaust gas flow channel; a carburetor including a gasifying chamber for gasifying a liquid fuel, a fuel pump for supplying the liquid fuel into the gasifying chamber, and a convey air inflow path for supplying an air into the gasifying chamber to convey the gasified fuel into a fuel injection nozzle; a fuel injection nozzle for mixing the gasified fuel from the carburetor with an air for burning, and supplying the mixed gas made of the gasified fuel and the air to the combustion chamber; a combustor disposed in the combustion chamber for injecting the mixed gas supplied from the fuel injection nozzle; an igniter for igniting the mixed gas injected from the combustor by generating sparks; and a flame sensor for sensing whether the flame is made on the combustor or not. 
   
   
       2 . The burner of  claim 1 , wherein the fuel injection nozzle includes: a mixing chamber for forming a mixed gas by mixing a gasified fuel and an air for burning; a burning air inflow path communicated with the mixing chamber for forming a passage to flow the air for burning into the mixing chamber; a fuel inflow path communicated with the gasifying chamber and the mixing chamber for forming a passage to flow a gasified fuel from the gasifying chamber to the mixing chamber; and a mixed gas inflow path communicated with the mixing chamber and the combustion chamber for forming a passage to flow the mixed gas from the mixing chamber to the combustion chamber. 
   
   
       3 . The burner of  claim 2 , wherein the mixed gas made of the gasified fuel from the gasifying chamber and the air for conveying from the convey air inflow path flows into the combustion chamber through the mixed gas inflow path of the fuel injection nozzle, and other air is not flew through the fuel injection nozzle. 
   
   
       4 . The burner of  claim 2 , wherein the fuel injection nozzle is one of a ventury type, an expanding type, and a swirling type. 
   
   
       5 . The burner of  claim 2 , further comprising a supplementary air inflow path com-municated with the exhaust gas flow channel of the diesel engine for supplementary supplying an air to the exhaust gas flow channel. 
   
   
       6 . The burner of  claim 1 , further comprising a control unit for electrically feedback controlling: a temperature and a pressure in at least one of spots in the combustion chamber; a temperature and a pressure of an air for conveying and an amount of flowing the air for burning which flows into the gasifying chamber; a temperature and a pressure of an air for burning and an amount of flowing the air for burning which flows into the fuel injection nozzle; an amount of liquid fuel supplied from a fuel tank using a fuel pump; and operations of the combustor, the igniter, the flame sensor, and the fuel supply pump. 
   
   
       7 . The burner of  claim 6 , further comprising a temperature and pressure sensor for sensing the temperature and pressure of the air for conveying and transfers the sensed temperature and pressure to the control unit, wherein the temperature and pressure sensor includes a convey air controlling valve for controlling an amount of flowing the air for conveying, which flows through the convey air inflow path. 
   
   
       8 . The burner of  claim 6 , further comprising a temperature and pressure sensor for sensing the temperature and pressure of the air for burning and transfers the sensed temperature and pressure to the control unit, wherein the temperature and pressure sensor includes a burning air controlling valve for controlling an amount of flowing the air for burning, which flows through the burning air inflow path. 
   
   
       9 . The burner of  claim 6 , further comprising: a clean air inlet for the igniter, which is communicated with the outside for sustaining an igniting member of the igniter to be clean; and an electric valve for controlling an amount of a fresh external air flowing through the clean air inlet or the igniter in response to the control unit. 
   
   
       10 . The burner of  claim 6 , further comprising: a clean air inlet for the flame sensor, which is communicated with the outside for sustaining a sensing member of the flame sensor to be clean; and an electric valve for controlling an amount of a fresh external air flowing through the clean air inlet for the flame sensor in response to the control unit. 
   
   
       11 . The burner of  claim 6 , further comprising: a clean air inlet for the flame sensor, which is communicated with the outside for sustaining a sensing member of the flame sensor to be clean; and an electric valve for controlling an amount of a fresh external air flowing through the clean air inlet for the flame sensor in response to the control unit. 
   
   
       12 . The burner of  claim 1 , wherein the porous material of the combustor is one of heat-resistant porous materials including a met type metal fiber, a ceramic, and a foam metal. 
   
   
       13 . The burner of  claim 12 , wherein the combustor has one of a cylinder shape, a cone shape, a rectangle pipe shape and a disk shape, and has a volume and a surface area, which is formed of an inside where the mixed gas inflows and an outside where the mixed gas is injected through. 
   
   
       14 . The burner of  claim 1 , wherein the combustor further includes a porous supporting member coupled to the inner side of the porous material for holding the shape of the porous material. 
   
   
       15 . The burner of  claim 1 , further comprising at least one layer of a porous cylinder shaped flame holder disposed to surround the external circumference of the combustor. 
   
   
       16 . The burner of  claim 1 , further comprising a combustion chamber where a mixed gas, which is made of an exhaust gas and a mixed gas supplied from the fuel injection nozzle, is burned. 
   
   
       17 . The burner of  claim 16 , wherein the inner wall of the combustion chamber is lined with at least one of fireproof insulators including asbestos, ceramicwool, cerakwool and firebrick. 
   
   
       18 . A diesel engine particulate filtering apparatus comprising: a combustion chamber; an exhaust gas flow channel of a diesel engine, which is disposed the front of the combustion chamber on the same axis of the combustion chamber; at least one of swirlers disposed between the exhaust gas flow channel and the combustion chamber for swirling the exhaust gas flowing into to the combustion chamber through the exhaust gas flow channel; a carburetor including a gasifying chamber for gasifying a liquid fuel, a fuel pump for supplying the liquid fuel into the gasifying chamber, and a convey air inflow path for supplying an air into the gasifying chamber to convey the gasified fuel into a fuel injection nozzle; a fuel injection nozzle for mixing the gasified fuel from the carburetor and an air for burning, and supplying the mixed gas made of the gasified fuel and the air to the combustion chamber; a combustor disposed in the combustion chamber for injecting the mixed gas supplied from the fuel injection nozzle; an igniter for igniting the mixed gas injected from the combustor by generating sparks; a flame sensor for sensing whether the flame is made on the combustor or not; and a diesel particulate filter disposed at one end of the combustion chamber. 
   
   
       19 . The diesel engine particulate filtering apparatus of  claim 18 , further comprising an adaptor disposed at one end of the combustion chamber and including a contracted portion at the center thereof. 
   
   
       20 . The diesel engine particulate filtering apparatus of  claim 18 , further comprising a temperature uniformization unit disposed at one end of the combustion chamber for accelerating mixing the high temperature gas with the exhaust gas.