Coke Oven Doors Having Heating Function

Abstract

An air chamber unit provided for a coke oven door enabling to suppress the generation of poor quality coke and reduce tar adhesion to coke oven door by accelerating coking reaction in the vicinity of coke oven door plug. An air chamber unit ( 17 ) is installed to control air supply to the bottom-less combustion space provided in hollow metallic coke oven door plug. For the purpose of long lasting stable air supply for said combustion space, air space ( 20 ) in the air chamber unit ( 17 ) is divided into two sections (A) and (B) by labyrinth partition to give different function for each of those section. Air intake pipe ( 27 ) is fitted in section (A) through bottom plate ( 21 ) of air chamber unit ( 17 ), wherein check valve plate ( 35 ) and other related components are provided as air supply control segments. Air supply pipe ( 30 ) or air delivery cup having one or more air inlet holes in upper portion is fitted in section (B) through bottom plate ( 21 ) of air chamber unit ( 17 ), wherein roles to remove contaminant particles suspended in backward flow gas are provided.

1 . An air chamber unit being connected to bottom-less combustion space provided in hollow metallic door plug of a coke oven door comprising: an air space divided into two sections  1  and  2  by a plurality of labyrinth partition plates working as gas passage guide; said section  1  equipped with air intake pipe having horizontal top edge inserted into said section  1  through bottom plate of said air chamber unit; said section  2  equipped with air supply pipe or air supply cup having at least one air inlet hole laterally in upper part of said air supply pipe or air supply cup being inserted through said bottom plate of said air chamber unit; top end of said air supply pipe or at least one air inlet hole of said air supply cup to work as air inlet; lower end of said air supply pipe or said air supply cup to work as air exit; exit end of said air supply pipe or air supply cup connecting to air supply line supplying air to said bottom-less combustion space provided in said hollow metallic door plug; a removable check valve plate mounted on top of said air intake pipe delivery end; a suspension coil spring fitted surrounding said air intake pipe to keep said check valve plate in floating position; at least one guide piece arranged outside of said suspension coil spring assuring correct up and down movement of said check valve plate; a stopper plate supported and placed above said check valve plate by said guide piece to prevent excess jump-up of said check valve plate; a cylinder-shaped air and/or gas flow guide plate fitted to exterior of upper part of said guide pieces keeping gap between said guide piece and said guide plate; a ring fitted to the lower surface of said check valve plate to keep appropriate relative position between said check valve plate and said coil spring head within a preferred range; and another ring fixed on a said ring-bracket fitted to said air intake pipe body or to said bottom plate of said air chamber unit keeping the bottom end of said suspension coil spring within a preferred position. 
   
   
       2 . An air chamber unit connected to bottom-less combustion space provided in hollow metallic door plug of a coke oven door comprising: an air space divided into two sections  1  and  2  by a plurality of labyrinth partition plates working as gas passage guide; said section  1  equipped with air intake pipe with horizontal top edge inserted into said section  1  through bottom plate of said air chamber unit; said section  2  equipped with air supply pipe or air delivery cup having at least one air inlet hole laterally in its upper part of said air supply pipe or air delivery cup being inserted through said bottom plate of said air chamber unit; top end of said air supply pipe or at least one air inlet hole of said air delivery cup to work as air inlet; lower end of said air supply pipe or said air delivery cup to work as air exit; exit end of said air supply pipe or air delivery cup connecting to air supply line supplying air to said bottom-less combustion space provided in said hollow metallic door plug; a hood with a diameter larger than that of said air supply pipe or said air supply cup with its bottom up position installed in said section  2  to provide a gas stagnant space; a removable check valve plate mounted on top of said air intake pipe delivery end; a suspension coil spring fitted surrounding said air intake pipe keeping said check valve plate in floating position; one or more guide pieces arranged outside of said suspension coil spring assuring correct up and down movement of said check valve plate; a stopper plate supported and placed above said check valve plate by said guide pieces to prevent excess jump-up of said check valve plate; a cylinder shaped air and/or gas flow guide plate fitted to exterior of upper part of said guide pieces keeping gap between said guide pieces and said guide plate; a ring fitted to the lower surface of said check valve plate keeping appropriate relative position between said check valve plate and said coil spring head within a preferred range; and another ring fixed on a said ring-bracket fitted to said air intake pipe body or to said bottom plate of said air chamber unit keeping the bottom end of said suspension coil spring within a preferred position. 
   
   
       3 . An air chamber unit being connected to bottom-less combustion space provided in hollow metallic door plug of a coke oven door comprising: an air space divided into two sections  1  and  2  by a plurality of labyrinth partition plates working as gas passage guide; said section  1  equipped with air intake pipe having horizontal top edge inserted into said section  1  through bottom plate of said air chamber unit; said section  2  equipped with air supply pipe or air delivery cup having at least one air inlet hole in upper portion of said air supply pipe or air delivery cup being inserted through said bottom plate of said air chamber unit; impingement vanes or pieces inserted inside of said air supply pipe or air delivery cup; said section  2  equipped with said air supply pipe or said air delivery cup; exit end of said air supply pipe or said air delivery cup connecting to air supply line sending air to said bottom-less combustion space of said hollow metallic door plug; a removable check valve plate mounted on top of said air intake pipe delivery end; a suspension coil spring being fitted surrounding said air intake pipe keeping said check valve plate in floating position; at least one guide piece arranged outside of said suspension coil spring assuring correct up and down movement of said check valve plate; a stopper plate supported and placed above said check valve plate by said guide piece to prevent excess jump-up of said check valve plate; a cylinder-shaped air and/or gas flow guide plate being fitted to exterior of upper part of said guide piece keeping gap between said guide piece and said guide plate; a ring fitted to the lower surface of said check valve plate keeping appropriate relative position between said check valve plate and said coil spring head within a preferred range; and another ring fixed on a said ring-bracket being fitted to said air intake pipe body or to said bottom plate of said air chamber unit to keep the bottom end of said suspension coil spring within a preferred position. 
   
   
       4 . An air chamber unit being connected to bottom-less combustion space provided in hollow metallic door plug of a coke oven door comprising: an air space divided into two sections  1  and  2  by a plurality of labyrinth partition plates which work as gas passage guide; said section  1  equipped with air intake pipe with horizontal top edge inserted into said section  1  through bottom plate of said air chamber unit; said section  2  equipped with air supply pipe or air delivery cup having at least one air inlet hole laterally in upper portion of said air supply pipe or air delivery cup being inserted through bottom plate of said air chamber unit; a hood having a diameter larger than that of said air supply pipe or said air delivery cup being fitted to above said air supply pipe or said air delivery cup to provide a gas stagnant space in said section  2 ; a removable check valve plate mounted on top of said air intake pipe delivery end; a suspension coil spring fitted to surrounding said air intake pipe to keep said check valve plate in floating position; at least one guide piece arranged outside of said suspension coil spring assuring correct up and down movement of said check valve plate; a stopper plate supported and placed above said check valve plate by said guide pieces to prevent excess jump-up of said check valve plate; a cylinder shaped air and/or gas guide plate fitted to exterior of upper part of said guide pieces keeping gap between said guide pieces and said guide plate; a ring fitted to the lower surface of said check valve plate to keep appropriate relative position between said check valve plate and said coil spring head within a preferred range; and another ring fixed on a said ring-bracket fitted to said air intake pipe body or to said bottom plate of said air chamber unit to keep the bottom end of said suspension coil spring within a preferred position. 
   
   
       5 . An air chamber unit of a coke oven door according to any one of  claims 1  to  4 , further including; more than two plates shorter than the distance between top and bottom plate of said air chamber unit; top or bottom edge of each of said plates fixed to top or bottom plate of said air chamber unit; said plates provided additional gas passage opening on their left or right corners; and labyrinth unit structured by said plates as labyrinth elements. 
   
   
       6 . An air chamber unit of a coke oven door according to  claims 3  or  4 , further including impingement vanes or pieces mounted on suspension shaft being fixed to top plate of air chamber unit or top of air delivery cup.