Coating the crude gas tract of a fly-stream gasification plant with a heat-resistant anti-stick layer

Abstract

A fly-stream gasification device for a process that employs powdery or liquid fuels—where liquid fuels are to be understood as oils, or oils containing solids, and water or oil suspensions containing fuels ground to the consistency of dust or inorganic additives—at pressures of between ambient pressure and 8 MPa and gasification temperatures of between 1,200 and 1,900° C., and which has a gasification means containing free oxygen, comprising a gasification chamber, a quenching device, and an element that belongs to the crude gas tract and ducts the crude gas, is embodied in such a way that an element ducting crude gas is made of heat-resistant carbon steel and furnished on surfaces in contact with the crude gas with an anti-stick layer able to withstand a temperature of 250° C. for preventing the carbonates that form from sticking.

1 .- 8 . (canceled) 
     
     
         9 . A fly-stream gasification device for use with powder or liquid fuels at pressures between ambient pressure and 8 MPa and gasification temperatures of between 1,200 and 1,900° C., and has a free oxygen gasification, comprising:
 a gasification chamber;   a quenching device; and   an element ducting the crude gas that belongs to a crude gas tract, wherein the quenching process operates at a pH value of >6.5 and the element ducting crude gas is made substantially of heat-resistant carbon steel and furnished on surfaces in contact with the crude gas with an anti-stick layer capable of withstanding a temperature of 250° C. for preventing the carbonates that form from sticking.   
     
     
         10 . The fly-stream gasification device as claimed in  claim 9 , wherein liquid fuels are selected from the group consisting of: oils, oils containing solids, water suspensions containing fuels ground to the consistency of dust or inorganic additives and oil suspensions containing fuels ground to the consistency of dust or inorganic additives. 
     
     
         11 . The fly-stream gasification device as claimed in  claim 9 , wherein the element ducting the crude gas is a pipeline. 
     
     
         12 . The fly-stream gasification device as claimed in  claim 9 , wherein the element ducting the crude gas is a washer. 
     
     
         13 . The fly-stream gasification device as claimed in  claim 9 , wherein the element ducting the crude gas is a Venturi tube. 
     
     
         14 . The fly-stream gasification device as claimed in  claim 13 , wherein the anti-stick layer is chemical nickel. 
     
     
         15 . The fly-stream gasification device as claimed in  claim 13 , wherein the anti-stick layer is chemical nickel PTFE. 
     
     
         16 . The fly-stream gasification device as claimed in  claim 13 , wherein the anti-stick layer is a fluoropolymer coating. 
     
     
         17 . The fly-stream gasification device as claimed in  claim 13 , wherein the anti-stick layer is an enamel.